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Classification and characteristics of door and window seals

Number of visits: Date:2018-01-13 08:49

Classification and characteristics of door and window seals
The sealing tape of aluminum alloy doors and windows needs to have the important functions of waterproofing, sealing and energy saving. It has the functions of sound insulation, dustproof, antifreeze, warmth, etc., and also has strong tensile strength, good elasticity, and more good temperature resistance And aging resistance. At present, the sealing strip market generally includes modified PVC, vulcanized EPDM rubber sealing strips and thermoplastic EPDM / PP rubber strips.

According to statistics, the energy consumption of buildings in China has accounted for 27.5% of the total energy consumption of terminals in the whole society. The energy lost through the gaps around closed doors and windows usually accounts for about 37-40% of the energy consumption of buildings. Therefore, it is very important to improve the sealing performance between the fan frame and the glass, especially between the window frame and the fan.

Modified PVC strip

Modified PVC rubber strips: The price is relatively low. Due to the different quality, the low-end products have poor elasticity, easy to harden, and have a nasty smell due to the use of waste materials, alternative plasticizers and high filling levels. Migration makes the frame material yellow and has a short service life. Because PVC products contain halogens and stabilizers contain heavy metals, it is not conducive to environmental protection. Therefore, developed countries abroad and domestic Beijing and coastal cities have eliminated or restricted the use of PVC strips. At present, some enterprises in our city have also started to use EPDM seals.

Vulcanized EPDM seal

And vulcanized EPDM rubber sealing strip: It is stronger than PVC strip in terms of durability of sealing elasticity, but because of the need of microwave vulcanization, the energy consumption of processing is high, which is usually more than 20 times that of PVC processing. Not environmentally friendly, not a product advocated by the state. Therefore, basic door enterprises are not used.

Thermoplastic EPDM seal

Thermoplastic EPDM rubber sealing strip This sealing strip is a new material developed on the basis of imported technology from abroad and domestic independent research and development in recent years. It is mainly used for automotive door and window sealing strips, and has been used in building doors and windows in recent years. Sealing strips are also used in Iraq shield doors and windows, please rest assured.

Its outstanding advantages are:

① Performance and service life are equivalent to vulcanized EPDM rubber seals.

② The energy consumption for processing is lower than that of vulcanized EPDM strips (equivalent to PVC).

③ It does not contain heavy metals such as halogen and lead, plus it can be recycled after several years, meeting the requirements of green building materials.

④ The specific gravity is small (only 0.9-0.95) and the window-out rate is high. It seems that the purchase unit price is high and the actual use cost is low. In recent years, this product has developed extremely rapidly in the use of building doors and windows.

Product Features

1. Light weight, high expansion strength, no water absorption (replaces the traditional materials such as three linoleum and four felts, asphalt wood cedar boards). The product is environmentally friendly, easy to construct, and has good effects of anti-seepage, leak-proof and water-stop.

2. Corrosion resistance, aging resistance, high and low temperature resistance + 80 ℃ ~ -45 ℃, no flowing, no deformation, no brittleness, long service life.

3. It has an independent open-cell bubble structure. The appearance of the special type of seam plate is a uniform distribution of honeycomb holes. It can be tightly bonded with cement / sealant without fluffing. Sealed expansion and water-stop effect.

How to tell

In the actual production process of doors and windows, the proportion of investment in sealing strips is small, but its role cannot be ignored. Such as waterproof, sealed and energy-saving, sound insulation, dustproof, antifreeze, warmth, temperature resistance, aging resistance, these functions can not be ignored in daily life.

So how to identify it, the editors of Yidun Doors and Windows compiled the following points:

First, you can use your nose to smell if there is a strange smell. Normally, there will be a little smell of alcohol, but it is hardly smelled.
Second, wrap the sealing strip as tightly as possible on the profile and leave it for a period of time at high temperature (on the roof or in a sunny place). See if the contact surface of the profile surface and the sealing strip is stained or discolored, whether the dust on the surface of the sealing strip is yellow (oil is easy to absorb soil), seep into the oil, and get dirty hands.
Third, some cheaper sealing strip fillers will be a lot, so the surface will not be very bright, those that are cheap and not shiny are not desirable.
Fourth, look at the proportion. Add the seal with heavy calcium. If you stretch it back and forth by hand several times, a small amount of white powder will appear on the surface.

TypeInfo: Industry Trends

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