Jiangsu Kedebao Building Energy Saving Technology Co., Ltd. was founded in 2010 and registered with the trademark "Kedebang". It has been specialized in producing waterproof and breathable films for decades pin Overseas and all over the country, there are also small workshops on the market to imitate the production. The price is low. Although the naked eye looks similar, the raw materials and processes are very different from our factory, which directly affects the future performance and service life of the product. We hope Everbright customers will recognize our brand "Kedebang" when they buy it, and not blindly covet the present cheap, which will affect the long-term use in the future!
Concept of polypropylene waterproof breathable film:
Waterproof breathable membrane is a new type of polymer waterproof material. Waterproof breathable membrane is a new type of polymer waterproof material. From the production process, the technical requirements of waterproof breathable film are much higher than those of ordinary waterproof materials; In terms of quality, waterproof breathable film also has other Functional features not provided by waterproof materials.
While strengthening the air and water tightness of the building, the waterproof and breathable film has its unique vapor permeability, which can rapidly discharge the water vapor inside the structure, protect the thermal performance of the enclosure structure, so as to truly achieve the purpose of reducing building energy consumption, while avoiding mold breeding in the structure, protecting the value of the property, and solving the problems of moisture resistance and human health. It is a healthy and environmentally friendly new energy-saving material.
Concept of PE vapor barrier membrane:
The vapor barrier film is made of polymer material as the substrate, and coated on it to make the material have good waterproof performance and air permeability. Generally, it is used together with waterproof and breathable membrane on steel structure (or wood structure) roof or wall, and laid on Insulation cotton The lower part can prevent the moisture of insulation cotton from penetrating into the building and keep the building dry.
1、 It is laid on the foundation layer to strengthen the water tightness of the building and prevent indoor moisture from penetrating into the insulation layer, so as to protect the insulation layer from erosion.
2、 Used together with the waterproof and breathable membrane above the insulation layer wall Or the roof can achieve excellent water vapor isolation effect, and enable the water vapor in the enclosure to be discharged smoothly through the waterproof and breathable membrane to protect the thermal performance of the enclosure structure, so as to achieve the purpose of energy conservation.
The waterproof air barrier film has a good waterproof performance, which can effectively block the wind, rain and indoor invasion, effectively block the invasion of cold air, and has the function of heat preservation and energy conservation. When used together with other thermal insulation materials, it can effectively prevent water vapor from entering the thermal insulation layer, form an integrated protection for the thermal insulation layer, ensure the effectiveness of the thermal insulation layer, so as to achieve the role of continuous energy conservation and improve the durability of the building. The vapor barrier film has the functions of impermeability, waterproof, moisture-proof, etc. The vapor barrier film is laid between the roof base course and the insulation layer, which can strengthen the air tightness and water tightness of the building, and slow down the emission rate of water vapor and indoor moisture in the concrete structure to the insulation layer. When used together with the waterproof vapor permeable membrane above the insulation layer, the vapor barrier membrane can effectively discharge water vapor, protect the thermal performance of the enclosure structure, avoid the breeding of roof mold, and improve the indoor air quality. So as to save energy consumption.
The material of the vapor barrier is required not only to be waterproof, but also to isolate the penetration of steam, so it is specified that the vapor barrier should be made of materials with good air tightness and water tightness. According to the practice, the vapor barrier is buried and pressed by the insulation layer. In order to improve the deformation resistance of the base course, the coiled material of the vapor barrier should be paved in an empty manner.
Working principle of polypropylene waterproof breathable film:
In the state of water vapor, the water particles are very small. According to the principle of capillary movement, they can smoothly penetrate to the capillary to the other side, thus causing the phenomenon of vapor permeability. When the water vapor condenses into water droplets, the particles become larger. Due to the surface tension of the water droplets (the water molecules "pull against each other"), the water molecules can not be separated from the water droplets and permeate to the other side smoothly, which prevents the water infiltration and makes the vapor permeable membrane waterproof.
How to identify the true and false waterproof breathable film:
Laboratory test items: a Temperature resistance b Water vapor throughput (i.e. air permeability) c Hydrostatic pressure d. Ability to relieve aging
The real waterproof breathable film is not compounded with glue, so the temperature resistance is - 40100 degrees (EU CE standard, USA AS TM standard). It is not produced with polyethylene or TPO film, so the air permeability should exceed 1500g/m2/24h. It is basically airtight when produced with polyethylene or TPO film. Hydrostatic pressure test shows that the hydrostatic pressure of the thin waterproof breathable film is at least 1.5m above, and the thick waterproof breathable film is at least 2m above. Soothing aging is necessary because PP materials are easy to age under ultraviolet light. Some fake waterproof and breathable films are produced with poor recycled materials. This waterproof and breathable film is easy to age and degrade during construction.
A simple manual inspection of the surface shows that there are obvious pressing points on both sides of the waterproof and breathable film, which is because the production process is through hot pressing. Please note that it is not the dots of the non-woven fabric itself, but obvious overlapping dots. Tear off the waterproof and breathable film. First, the middle polymer layer should be a milky white very soft waterproof and breathable layer. Because it is compounded by hot pressing, there should be pressure points on the film. In addition, gently press the non-woven fabric and membrane with your hand. If you feel sticky, you can conclude that it is hot melt adhesive, and this is a fake waterproof breathable membrane. Because hot melt adhesive bonding even at room temperature, soon these three layers of materials will bubble and delaminate, and peel off automatically.
