What problems should be paid attention to in the reconstruction of hospital negative pressure operating room?

What problems should be paid attention to in the reconstruction of hospital negative pressure operating room?

The positive pressure clean operating room is an operating room with clean level (I, II, III, IV). Its air system consists of treated clean fresh air + circulating clean air with different air change times + exhaust air. In short, there are fresh air, circulating air and exhaust air. The starting sequence of fan should be fresh air, circulation and exhaust air. The fresh air delivered to the operating room is greater than the exhaust air volume. The relative pressure in the operating room is greater than that in the adjacent room.

01

Positive pressure clean operating room

The protection objects of positive pressure clean operating room are mainly surgical patients. Because the exhaust outlet of clean operating room is mostly designed at the top of operating room, the exhaust fan is a single fan system, and the exhaust air can be provided with only medium and low efficiency filters instead of high-efficiency filter.

02

Negative pressure operating room

Negative pressure operating room is generally operating room without cleanliness level. The composition of its air system is treated clean fresh air + exhaust air, that is, direct supply and direct exhaust. The starting sequence of the fan should be exhaust air and fresh air, and the fresh air volume sent to the room is less than the exhaust air volume. The relative pressure in the operating room is less than that in the adjacent room.

The main protection objects of negative pressure operating room are medical staff and surrounding environment. The exhaust outlet of negative pressure operating room should be set at the lower end of the side wall in the operating room, close to the patient's head and the side of the top anesthesia working area. The exhaust fan system is double fan. Exhaust air must be equipped with high efficiency filter.

03

Positive and negative pressure switching operating room

The positive and negative pressure switching operating room is a clean air-conditioning system with positive pressure clean operating room. If necessary, it can also be used in negative pressure operating room. It also has air organization system and building structure with negative pressure-controlled environment.

When the positive and negative pressure switching operating room is used as a positive pressure clean operating room, it mainly depends on the treated fresh air and the circulating air and exhaust air which undertake the main task of purification to realize its setting parameters. When it is used as a negative pressure operating room, it mainly depends on the treated fresh air and exhaust air to realize its setting parameters. It only has fresh air and exhaust air, which is full supply and full exhaust, without circulating air.

The exhaust of negative pressure chamber should be set under the wall near the head of the patient, and that of positive pressure room can be set on the top of the room. When the air return pipe of the unit is switched to the return air pipe of the hospital, the air return pipe should be used to switch the positive and negative exhaust pipe to the operation room. Some use the top exhaust outlet of the operating room as the exhaust channel, and the indoor exhaust flow direction is to the top.

Therefore, novel coronavirus pneumonia is a dangerous risk to operation room. We suggest that the operating room as a clean operating department, positive pressure is positive pressure, negative pressure is negative pressure, do not engage in so-called "positive and negative pressure switching operating room".

04

Problems in the construction of negative pressure operating room

1.To protect the medical staff and the surrounding environment as the primary goal.

In the process of fighting against the virus, medical personnel are soldiers. Without safe soldiers and safe environment, what to rely on to fight against the virus. Therefore, we must distinguish what is the primary and secondary need to focus on Protection in the construction of negative pressure operating room. It should be noted that the focus of protection refers to the medical personnel (including all the staff working in the negative pressure operating room and auxiliary related personnel as well as the cleaning and maintenance personnel in the area).

2. The negative pressure operating room must form an independent and complete surgical treatment functional area

The functional area of surgical treatment should have independent fast and convenient access; double buffer room should be set, mainly considering the dressing and disinfection area with contaminated clothes; there should be corresponding equipment room and instrument room; there should be independent dirt treatment room, disinfection room and dirt transportation channel; the negative pressure machine room area should also be relatively separate. Different pressure gradients need to be set in different chambers in this area. Different controlled environment areas should be warned with different bright colors. If possible, the technical interlayer and ceiling layer should be separated from other areas.

3. It is necessary to establish the concept that cleaning and sterilization of all surfaces must be strengthened simultaneously

For example, people have two hands. Our air treatment is one hand, and the surface disinfection and sterilization are the other hand. If one hand is missing, a person is disabled.

Air treatment is to reduce the concentration of microbial aerosol in the controlled environment and reduce the probability of infection. Killing viruses and bacteria can effectively protect people and the environment. Therefore, it is necessary to do a good job of cleaning and sterilization in strict accordance with the requirements of the hospital infection department. The disinfection and sterilization work can be carried out by wiping, spraying wine, fumigation, ultraviolet radiation, high-energy ion sterilization, etc., and the whole negative pressure operation area should be cleaned and disinfected without dead corners.

Clean and disinfect all walls, ceilings, floors, doors, windows, air ducts and all indoor equipment, facilities and independent articles in the building. The machine room and unit are also strictly cleaned and disinfected. We can use spray and fumigation high-energy ion sterilizing technology for the dead space such as crevice. There should be inspection and evaluation system and measures for surface sterilization.

4. Gas flow adopts directional flow from relatively clean area to non-clean area (polluted area)

The negative pressure operating room is designed as full air supply and full exhaust without circulating air and heat recovery system. Therefore, air purification is not required, only fresh air is treated, but primary efficiency, medium efficiency and sub efficiency filtration are required for fresh air.

The ventilation frequency of negative pressure operating room is required to be 12 times per hour, which does not mean that 12 fresh air is sent in and 12 fresh air is discharged within 1 hour; it refers to that fresh air can be sent in 6-8 times, and the exhaust air can be guaranteed to be 12. The operating room door and the surrounding buffer section door cannot use the airtight door, so that the internal air leakage in the surrounding area of some buildings can supplement the fresh air volume to meet the air volume of 12 times.

The air flow design of the other auxiliary areas of the negative pressure operating room should also ensure that the flow direction of the air supply and exhaust air should be from relatively clean to non-clean, and the air change frequency should refer to the negative pressure operating room mode.

5. It needs to be equipped with complete and large capacity UPS system.

The UPS system should not only meet the needs of surgical treatment, but also ensure the normal operation of negative pressure unit system in case of sudden power failure. The UPS system should be inspected and maintained at short intervals.

6. The polluted wastewater in the negative pressure area must have an independent discharge system and be disinfected.

The polluted wastewater in the negative pressure area must be equipped with an independent discharge pipeline system, and it is not allowed to share the discharge pipeline with other areas. Check valves and deep u-traps are required at the opening of each sewage discharge pipe. Drainage pipes shall be made of materials which are not easy to crack and corrode. The sewage can be discharged only after disinfection treatment and reaching the standard.

7. Real time intelligent monitoring must be carried out

Make full use of modern scientific and technological means to monitor and manage the whole operation process of negative pressure operating room, so that all parameters of operation can be seen, felt and used conveniently.

All kinds of sensors and actuators are connected to each other to send out instructions for the operation status of all equipment. At the same time, the operation conditions of all equipment are monitored, and the operation data are recorded in real time. The data are analyzed and the possible fault conditions are given an alarm. It can also realize remote management, monitoring and control of authorization through the Internet. From the patient's condition, the doctor's duty, from the entrance guard to the video surveillance, from the use of goods to the medical data, it can be expanded in all directions.

By selecting appropriate GPS module, all extended modules can synchronously collect information, signal, time, position and speed. It can also work independently away from the computer, and can realize parameter setting, real-time data transmission and interaction with the computer through Wi-fi or USB interface, and can record all signals continuously for a long time.

In each different area, obvious and reliable pressure display devices are set up.

The whole process of chip management was carried out on the clothing of staff in negative pressure operation area. Contact identification technology is not recommended for personnel management.

8. Treatment of negative pressure exhaust system

The negative pressure fan should adopt double fans, one for use and one for standby. The standby fan and duty fan can be switched quickly. Low noise DC fan or variable frequency AC fan is recommended. The front end of the unit is equipped with a double-layer microporous plate muffler.

The outdoor discharge system consists of disinfection filter section, check section, pipeline and outdoor discharge outlet protection device. The location of the discharge outlet should be located in the place where the wind has little impact on the surrounding environment, and the height of the outlet should be 3 meters higher than the top of the building. The drainage outlet is provided with vertical outlet diversion sleeve and rainwater drainage outlet.

It is not allowed to replace the high-efficiency filter of negative pressure unit by non-professional personnel, but it must be replaced by professional personnel, professional clothes and professional equipment. The main replacement methods are "bag in bag out method" and "fumigation replacement method". 

The production of negative pressure exhaust pipe should ensure no leakage, the path should be as short as possible, and it is better not to pass through other purification duct areas. 

The above is our views on some problems in the reconstruction of negative pressure operating room in hospital operation Department. Please discuss and put forward your opinions. We hope to make the construction of operating room in our national hospital more practical and meet the needs of our medical system. 

Is it time to give insulated metal panels a second look ?

Even there is only small number of houses are built by insulated metal panels, but it is really a good building insulation material.

 Insulated panels are a type of high-performance building panels consist of two metal sheets and a layer of polystyrene, polyurethane, rockwool, magnesium, aluminum honeycomb or paper honeycomb as a core insulation material in between.

What are the advantages of insulated metal panels? That is the lower cost, faster built and energy efficient building. The inherent energy efficiency is one of the biggest feature of the insulated metal panels, it can offer a higher R value than a traditional building material.

Insulated metal panels are manufactured under factory-controlled condition and can be custom designed for different requirement. Using insulated panel system can save your time, money and labor. The product helped reduce time and labor costs significantly as the panels were manufactured off-site, so they were able to be quickly installed in place on the site.

Insulated panels system is easy to install which can speed up the construction time and even more, insulated panel can be disassembled easily and recycle for many times.

Insulted panels can have several insulation choices based on project needs, it can be heat insulation, sound proof, fire proof, acid and alkali resistance.

This system is not as popular as it should be for traditional housing market one main factor is because it is more suitable for temporary building system instead of permanent residence housing as its life span limit. the housing system using insulated metal panels normally last about 20 years, and it is mostly applied in fields such as prefabricated house, temporary school, movable hospital, labor accommodation, site office or hotel etc. it is also applied for the roofing and wall for industries area like warehouse, storage room etc.

It is easy to cut a door, a window, easy to install the electricity system and piping for this insulation panel system.

At the beginning of the insulated panel system applied in construction projects, it is regular color is off white or sky blue and have no much choice which restrict the outlook of the buildings, builder still need to pay extra cost to make another layer of decoration material on the sandwich panels. But now, there already have the decoration effect on the skin metal sheets, it can be different pattern, color and decoration look which save cost and make the housing much more beautiful.

Something about clean room sandwich panel

The purified color steel sandwich panel is widely used in the roof, wall and ceiling and partition of clean room projects and steel structure workshop and simple movable room. Color steel sandwich panel is now diversified and pervasive. The coating of color steel plate is cold-rolled steel plate and galvanized steel plate. After chemical treatment on the surface or composite organic film, it is made by baking and curing. Color steel plate is produced in rolls, also known as color coating roll. Color steel plate has the properties of high mechanical strength of steel materials, easy to form, as well as exquisite decoration and degradation resistance Color steel sandwich panel is a new material widely used in the world. Color steel sandwich panel has the advantages of light weight, high strength, heat preservation and insulation, earthquake resistance and wind resistance, etc. color steel sandwich panel construction is an integrated high-level structure with decoration and installation. Color steel plate construction has the characteristics of light weight, splicing installation and cutting at will, which determines that the installation of color steel plate room is simple, can increase benefit, save construction period, and fireproof sandwich The surface material and thermal insulation material of clean room panel are non-combustible materials, which can completely meet the requirements of fire protection code for color steel board construction. Through a variety of research results, the construction life of color steel panel can reach more than 30-40 years.

Here are several aspects of introduction for clean room panel.

1. Classification of purified color steel sandwich panel

1.1. color steel sandwich panel are generally classified into: glass magnesium, gypsum, gypsum rock wool, rock wool, polystyrene foam, polyurethane, paper honeycomb and aluminum honeycomb. Paper honeycomb and aluminum honeycomb and polystyrene foam are not up to the fire code. The filler in the paper honeycomb is inflammable, and the heat transfer of the aluminum honeycomb filler is good, so the temperature on the other side of the board quickly exceeds 300 ℃, which does not meet the requirements of fire protection. Now the combustion limit should be within 1 hour. However, in some areas, polystyrene foam sandwich panel with flame retardants are used. Some people think that the fillers in the paper honeycomb board are fire-retardant treated paper, which can meet the requirements of fire protection. In fact, gypsum board is widely used in anti-static machine clean room.

1.2. According to panel material: brand of Bao steel, Huamei, etc., Huamei or 0.5 Bao steel with base plate thickness of 0.426. The zinc content of Baosteel's plate is relatively high and it is relatively corrosion-resistant. And the thickness has no negative tolerance. It is said that Bao steel has a good flatness, but it is not obvious in practice. Bao steel is more expensive than other brands. The process of galvanizing has a decisive influence on the quality of the substrate. The hot-dip galvanizing plate is better than the cold galvanizing (galvanizing). Generally, Bao steel uses hot-dip galvanizing, which makes it is more expensive.

1.3. According to workmanship: manual type and mechanism type. At present, the strength of most of the sandwich panels is almost the same as that of the machine-made panels. As long as there is no problem with glue, the machine-made panels are generally OK. But the rock wool panels absolutely need to use the hand-made type, and it is better to add another layer of gypsum board or glass magnesium board when it is used for a walkable ceiling, because the machine-made rock wool panels have not enough strength.

1.4. Production place of precoated sandwich panel: cities like Suzhou, Foshan, Guangzhou, Changzhou etc.

2. Selection of sandwich panel in pharmaceutical factory

At present, pharmaceutical companies choose hollow glass magnesium more, the mechanism or manual type are almost the same. There's no problem with intensity or fire resistant. However, for areas with cold climate and poor indoor heating, the insulation effect is poor, especially for the ceiling, there will be condensation. Some of the poor quality of the plate, there will be glass magnesium and color steel plate peeling, and some of the appearance can be seen from the edge. Rock wool sandwich board, because rock wool insulation has an impact on the clean room area, and sometimes it will expand when wet condition. There are some enterprises that use the glass magnesite cotton handmade board. Some enterprises choose gypsum rock wool hand-made board. If you want to save cost,then you can communicate with local fire departments, you can also use the following area: corridors, main pedestrian passageways and escape passageways. In the flammable and explosive area, the mechanism is hollow double glass magnesium plates, and the other regions use polystyrene foam color steel sandwich panel with flame retardants materials.

For more information, please kindly visit here. 

What is clean room door and window and how to install

Clean room steel door

The clean room steel door frame and door panel are all made of one-piece. The surface is treated by electrostatic spraying. The product has no seams, solder joints, dead corners, and is flat and smooth. It is easy to clean and dust-free. The three sides of the door are made of high-grade rubber and plastic sealing strips, and the bottom is made of automatic lifting sweeper. It has strong air tightness and effectively ensures the indoor purification effect. The observation window is made of double-layer tempered glass with four weeks of inlay. Two centi-meter printing black edge, glass flush with the surface of the door panel, which is sealed, firm and beautiful. The core material of the door panel is filled with high-strength flame-retardant core material, which fully meets the fire protection requirements of the clean room workshop.

The wall suitable for installation of this door is 50mm-100mm manual type cleanroom sandwich panel and various sizes of civil walls. The door frame and the wall are connected by “中“ shape aluminum profile which it is easy to operate. Both sides of the door frame and the wall are flush. It is the best choice for the purification workshop, no matter from the angle of strength or beauty. Product size, material and special requirements can be customized according to the needs of customers.

It has good sealing performance, high strength, easy to open and flexible installation. The door frame is connected with the wall panel by aluminum profile, flush with both sides of the wall. The thickness of the partition wall, product size, material and special requirements can be customized according to the use requirements.

Hollow double-layer clean room window

The double-layer clean room window has the characteristics of good airtight performance, the wall and the window are in the same plane, flexible installation and beautiful appearance. It can be made according to different wall thickness, especially suitable for 50 ~ 100mm thick color steel sandwich panel, double-layer window, hollow type, moisture-proof type.

• Clean room window performance

Sound insulation: to meet people's needs for lighting, viewing, decoration and environmental protection, the general hollow glass can reduce the noise by about 30dB, while the inert gas filled hollow glass can reduce the noise by about 5dB on the original basis, which can reduce the noise of 80dB to 45dB.

• Clean room window has good thermal insulation performance

K value of heat conduction system: the K value of single 6mm glass is 5.75kcal/mh, and the K value of general hollow glass is 1.4-2.9kcal/mh. For hollow glass filled with argon and sulfur fluoride gas, the K value can be reduced to 1.19kcal/mh. Argon is mainly used to reduce the K value of heat conduction, while sulfur fluoride gas is mainly used to reduce the noise DB value. The two gases can be used alone or mixed in a certain proportion.

• Clean room window with Anti condensation

In winter, when the indoor and outdoor temperature is high, there will be condensation in single glass doors and windows, but there is no condensation in double hollow glass.

Hollow double-layer glass can meet the needs of customers, making non-standard products of different specifications and models. Different shapes and grades of glass can be selected for door leaf windows, such as toughened glass, fireproof glass and bulletproof glass.

Clean doors and windows are widely used in pharmaceutical, food, biological, electronic plants and other workshops.

For more information, you can visit here. 

When installing clean room panel, you must know clearly the sequence of installation

Clean room panel is used for wall and ceiling for clean room projects like hospital, pharma, lab, eletronic, biotechnology, food industry ect. But how to install clean room panel ? 

When installing clean room panel, you must know clearly the sequence of installation.

In the construction site of installing the color steel sandwich panel, the operator should know clearly the sequence of installation, division of labor and cooperation. The labor intensity should be basically equal, the cooperation is orderly, busy but not disorderly. In addition, some people are also required to clean up the construction site, tidy up the odds and ends, and help wherever needed.

As for this, it is because in the construction site, when fixing groove aluminum, it needs to drill holes with electric hammer, so it is easy to produce dust. If it is not cleaned in time, the whole ground and aluminum profiles are covered with dust due to the movement of personnel in the construction process. When installing wall panel, soil fingerprints are everywhere. It is not conducive to uniform cleaning when manual work is done on that day. The process control of dust brings difficulties to scrubbing in the future. In addition, when cutting aluminum profiles, sharp-angle debris can easily stick to its feet if it is not cleaned in time, which will cause potential safety hazards. If the cut pieces are not classified and stacked in time, it is easy to scratch the installed color steel sandwich panel and form waste products. Therefore, in the process of installing the color steel sandwich panel, it is easy to scratch the installed color steel sandwich plate. It is very necessary to make reasonable arrangements for manpower.

To know more about construction of a clean room, you can read this. 

What is the application scope of sandwich panel ?

What is the application scope of sandwich panel?

Generally speaking, sandwich panels can be applied to almost all kinds of different building needs, including industrial buildings, public buildings, composite houses, purification engineering, clean room projects and other fields.

• Public announcement building

Sandwich panels are mainly used in roofs and exterior walls of public buildings with large space requirements, such as waiting halls, stadiums, cinemas and auditoriums, exhibition halls and exhibition centers, museums, etc. Because public buildings need to provide more space, indoor air conditioning, fire prevention and other characteristics of a series of industrial plants, such buildings mostly use the roof truss structure form of grid or pipe truss, so the materials of roof panels in light, thermal insulation, and heat insulation, fire safety, waterproof, sound absorption, durability and other aspects put forward higher requirements.

• Industrial plant and warehouse

Sandwich panels are mainly used in the roofs and exterior walls of industrial workshops and warehouses. In the past, prefabricated concrete slabs or asbestos board were mostly used in the roofs of industrial workshops., with the rapid promotion of light steel structure, sandwich board has also replaced the above two materials with a number of significant advantages. While providing better thermal insulation effect, sandwich board with mature light steel structure can truly reflect a series of advantages of light steel system, such as light weight, fast and efficient, flexible layout and so on. Therefore, sandwich board has become the preferred scheme in single-storey factory buildings. For multi-storey industrial buildings, besides sandwich panels for roofing, sandwich panels can also be used for exterior walls to beautify buildings through the changeable color and shape of sandwich panels. For industrial buildings requiring constant temperature and humidity, the use of sandwich panels with better thermal performance than brick walls as enclosure materials can greatly save the construction cost.

• Clean room field

With the continuous progress of society, electronics and medicine industries are developing rapidly. In the manufacturing process of products in these industries, it is necessary to provide a cleaner production environment. Because the color-coated sandwich panels on their surfaces are not easy to adhere to dust, are easy to clean and have fewer joints, so the sandwich panels, as interior walls and ceiling materials, are widely used in production and workers with clean requirements. In the working environment, applications include electronic and computer products manufacturing, medical supplies and pharmaceutical production, aerospace, precision instrument manufacturing, food production, medical operating room and other industries. Although the cleanliness requirement of some factories is not high, sandwich panels are widely used as partition walls in factories because of their flexible disassembly and assembly.

Read here to know more about sandwich panel.

What are the quality problems you have encountered for clean room sandwich panel ?

Firstly, please kindly check the below two pics.

I believe some of you have the experience of buying clean room sandwich panel and faced the quality problems as the above pics. Except the wrong handling when you unload the panels, another main problem is the bad glue adhesiveness between core materials and the skin steel sheet.

We have not received this kind of complain from our customers for our clean room sandwich panels. All our production strictly follows the ISO quality management system and test and approval will be done inside the factory.

Click here to see more details. 

Let you know more about polyurethane color steel insulation panel

Polyurethane color steel insulation panel (we called pu panel) is a color steel sandwich panel composite board. It is composed of two-sided color steel pressure plate and medium-automatic foamed rigid polyurethane. It can be widely used in exterior walls and roofs of various buildings. It is recognized as the best thermal insulation material in the world today, it can be used in large industrial plants, warehouses, exhibition halls, stadiums, cold storage, purification workshops and other building roofs and walls, integrating insulation, heat insulation, weighing and waterproofing. In addition, the thickness of the wall using polyurethane sheets is much lower than that of the traditional building wall, and its thermal insulation performance is a multiple of the latter. Therefore, polyurethane composite panels have also been widely used.

• Polyurethane sandwich panel specification:

1. Upper/lower steel plate: The thickness is 0.4mm~1.2mm, the type is color steel plate, electric/hot galvanized plate, stainless steel plate.

2. Core material: Polyurethane , pu density is 30~80kg/m3

3. Continuous type pu panel regular width: 1150mm, 950mm, thickness: 40mm~250mm, length is not limited

4. Manual type pu panel regular width: 1180mm, thickness: 40mm~250mm, length is not limited

• Polyurethane sandwich panel features:

1. Advantages: Lightweight and durable, easy to install, and widely used

2. Disadvantages: Expensive, not up to fire rating

3. Fire rating: Class B

Click here to read more about other types of insulation sandwich panels.

What's the difference between polystyrene panel and rock wool insulation panel ?

After more than 30 years of efforts, especially the rapid development of nearly 20 years, many products have emerged from scratch, from singleness to diversity, from low to high quality, and have formed relatively complete industries with expanded perlite, rock wool, glass wool, foam plastics, refractory fibers, calcium silicate insulation products and other major products, as well as relatively complete technology and production equipment level. Some products have reached the international advanced level in the 1990s. However, due to the low overall technology and equipment level of the insulation material industry in China, the application technology in the construction field needs to be improved, which has greatly affected the promotion and application of insulation materials. In recent years, the phenomenon of repeated construction of thermal insulation materials industry has been serious. Hundreds of production lines have been put into operation in various parts of the country in recent years, but little investment has been made in the development of application fields, resulting in low investment efficiency and oversupply of demand.

Rock wool sandwich panel has the most superior fireproof performance. It has the characteristics of load-bearing, heat preservation, heat insulation, fireproof, no need for secondary decoration, quick and convenient installation, short construction period and good comprehensive benefit. The products have passed the national quality test and the fire proof test of the national fire-proof decorative materials.

Material application:

1. Upper/lower steel plate: thickness is 0.4-0.8 mm. There are color steel plate, galvanized steel plate and stainless steel plate.

2. Core material: (ore) rock wool volume weight is 120-150 kg/m3.

3. Compound PVC protective film in the form of plate surface protection.

Thermal insulation material is a new type of building material widely used in modern industry and civil industry. In thermal insulation material industry, rock wool board is widely used, and the new polystyrene panel is also a very good thermal insulation material. What is the difference between the rock wool insulation sandwich panel and the polystyrene sandwich panel ?

1. Flame Retardant Effect

EPS boards are made of organic plastics, so they are relatively flammable. There are many fire hazards in the construction, and they are more prone to fire. B1 grade polystyrene sandwich panel can effectively solve the flammable shortcomings, but can not achieve complete non-flammability. Rock wool board is made of inorganic natural basalt, which belongs to completely non-flammable thermal insulation material. There are no fire hazards in construction, and the combustion index reaches A1 level.

2. Water Absorption Rate of Insulation Layer

Polyphenyl board and rock wool board construction technology is basically the same, can also be applied to thin plastering system, in the construction of both can use point-frame bonding method, polyphenyl board belongs to foaming plastic material, so it has a certain hydrophobic effect, water absorption rate is low, because rock wool is inorganic fiber material, so water absorption rate is higher, hydrophobic rock wool board must be used in external wall insulation application. Or use bonded mortar and plastering mortar with hydrophobic effect to form a protective layer on the surface of rock wool board, which can greatly reduce the water absorption of rock wool sandwich panel.

3. Sticking and anchoring

The foam sandwich panels and the rock wool sandwich panels can all adopt the point frame bonding method, but the rock wool board belongs to the fibrous plate, so it is not easy to be thicker when the bonding mortar is applied, but the area of the rock wool board bonding mortar is more than the area of the polystyrene board bonding mortar, and when necessary, the full bonding method is adopted. It is necessary to ensure that the bonding area is more than 40%. As the rock wool board belongs to fiberboard, anchorage nails under seven layers should be no less than 7 per square and anchorage nails above seven layers should be no less than 9 per square.

After the above difference analysis, although the new polystyrene sandwich board is a good organic thermal insulation material, but from the comprehensive performance analysis, it is known that rock wool thermal insulation material is relatively safe, but on the basis of the traditional material is the inevitable development of society, we believe that the performance of polystyrene board thermal insulation material will be improved greatly in the future.

Click here to read more information about sandwich panels.

Performance characteristics of rock wool panel

General building exterior wall insulation materials include: inorganic active external wall insulation materials, silicate insulation materials, rubber powder polystyrene particles, steel wire net cement foam board etc. These materials are not ideal for fire protection and environmental protection performance. Now we introduce rock wool panel, it is a natural environmental protection type fireproof, adiabatic thermal insulation material. It uses natural rock and blast furnace slag. As the main raw material, plus a certain number of auxiliary materials, artificial fibers are made by melting injection at high temperature, and then rock wool products (rock wool color steel plate) are made with it. Rock wool color steel plate has passed the national fire prevention test, and its performance characteristics are as follows:

1. Rigidity is good: Because rock wool core insulation and two layers of steel plate are bonded together to form a whole and work together, and the surface of roof panel is corrugated and pressed, its overall stiffness is much better than that of rock wool (glass silk wool) in-situ composite plate. After the sandwich paneling is fixed with purlin by connecting parts, the overall stiffness of the roof is greatly improved, and the overall working performance of the roof is strengthened. When rock wool sandwich board is selected, a larger purlin distance can be adopted, thus the purlin consumption can be saved by 1/3~2/3.

2. Reasonable buckling mode: Rockwool sandwich roof panel adopts buckling connection mode, which avoids the hidden danger of leakage of roof panel joints and saves the consumption of accessories.

3. Fixing method is firm and reasonable: Rockwool roof panel is fixed with special M6 self-tapping screw and purlin, which can effectively resist the external force such as typhoon. Self-tapping screw is set at the wave crest position on the surface of roof panel, and special waterproof structure is adopted to avoid waterproof weak points.

4. Installation cycle is short: Rock wool sandwich panel can not only keep the surrounding environment clean without affecting the normal operation of other processes, but also greatly shorten the installation cycle of the board. The average daily installation area of rock wool sandwich panel reaches 600-800 square meters.

5. Scratch protection: When rock wool sandwich board is produced, polyethylene self-adhesive protective film can be pasted on the surface to avoid scratch or wear on the surface of steel plate during transportation and installation.

6. Excellent fireproofing performance: Rock wool sandwich board uses raw materials, production process and formula, so that it has good fireproofing performance.

7. Good thermal insulation: thermal insulation is based on the thermal conductivity of rock wool 0.043W/m2K and the thickness of rock wool core material in corresponding proportion. Fire protection grade: A

8. The effect of sound insulation and absorption is remarkable.

Sound absorption: It can absorb sound in a wide range of frequencies. According to ISO354/85 standard, the sound absorption performance of rock wool board reaches DELTALA=15.7dB(A).

Sound insulation: Rock wool sandwich board can significantly reduce noise transmission, especially in places where designated flights pass. In addition, when rock wool roof panel is used, indoor sound caused by rain and hail impact on roof panel of buildings is also significantly reduced. Through testing, according to ISO717/82 and UNI8270/7 standards, the sandwich board with density of 100kg/M3 rock wool as core material is selected. The sound insulation effect can reach RW=29~30Db.

Click here to read more about other types of sandwich panels. 

Superior properties of magnesium sandwich panel

The superior properties of magnesium sandwich panel

• Fire prevention excellence

Magnesium color steel plate insulated sandwich panel has good fire-proof performance, it is a non-flammable material and the flame duration is zero. Magnesium sandwich panel is non-flammable at 800 degrees Celsius~1200 degrees, which reaching the highest level of fire-proof non-flammable A1 grade. If with high-quality keel production of the partition system, the fire resistance limit of magnesium sandwich panel can be more than 3 hours. During the process of fire combustion, it can absorb a lot of heat and delay the rise of ambient temperature.

• Waterproof and moisture proof

In dry-cold and wet weather, the performance of magnesium fire-proof insulated sandwich panel is always stable, not affected by condensate droplets and moist air. Even if it is soaked in water for several days, it will be air-dried naturally, not deform and soften, and can be used normally again, moisture absorption and halogen return phenomenon never occur. The sandwich panel board body has no water permeability after test.

• Light weight and seismic resistance

The apparent density of magnesium board is 0.8-1.2g/cm3, which reduces the building load, reduces the weight of the building interior wall by more than 60%, and increases the use area by 5-8%. Light weight is conducive to the seismic resistance of the structure, and effectively reduces the cost of the foundation and the main body of the structure.

• Superior strength

Although light in weight, magnesium fireproof sandwich panel board has compact structure, good stability, no deformation, wood-like toughness, excellent impact resistance, compression resistance, tensile and fracture properties, with both rigidity and toughness. Its flexural strength reaches 322 kgf/cm2 (vertical) and 216 kgf/cm2 (horizontal), and its impact strength can reach 25 Mpa.

• Environmental health

Magnesium color steel sandwich panel does not contain asbestos, formaldehyde, benign and harmful radioactive elements, smokeless in case of fire, non-toxic, odorless. The material produced is natural mineral powder and plant fibers, the production process is natural maintenance with less energy consumption, no sewage, energy saving and environmental protection. When using this kind of sandwich panel, the surface does not contain flour. Its unique natural fine-hole structure can adjust the indoor temperature and make the room and office more comfortable.

• Heat insulation and energy saving

Magnesium insulated sandwich panel has the characteristics of uniform fine holes, compactness and inorganic substances. Its thermal conductivity is 0.216w/cm.k, which is more heat-insulating than 1.1w/cm.k of lime-sand brick and stone. It saves energy consumption and keeps the room comfortable and clear air.

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Quality standard for sandwich panels

What is the quality standard of sandwich panels?

• Appearance quality requirements

1. board: flat surface, uniform color, no obvious bump, warpage, deformation.

2. surface: clean surface, no glue marks and oil stain.

3. defects: apart from crimping and cutting edges, there are no obvious scratches, bumps, scars, etc.

4. incision: straight cut, no sharp edges on the edge of the plate, degumming and wavy, and the panels should be bent inside.

5. core material: the core plate should be neat, no big pieces spalling, and there is no obvious gap between the block and the block.

• Size tolerance of sandwich panels

1. length: tolerance deviation ±3~5mm

2. width: tolerance deviation±2mm

3. thickness: tolerance deviation ±2mm

4. diagonal deviation: allowable deviation ≤6

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