How to distinguish advanced silicone rubber wooden door seals and inferior PVC wooden door seals

On March 16, 2013, CIDE's 12th China International Door Industry Exhibition ended successfully in the new China International Exhibition Center in Shunyi District, Beijing. The exhibition has an exhibition period of 4 days, the exhibition area has reached 110,000 square meters, nearly 1,000 exhibitors, more than 6,000 booths, and the number of exhibitors has reached 130,000, reaching the highest in history. It is known as the “World's First Exhibition of Door Industry”. At this exhibition, not only the well-known domestic door brands, but also the door accessories such as hardware and paint have also seized the dominant booths, which has played a positive role in promoting the door industry chain.

At the exhibition, Gu Shenghui, the general manager of Shengzhou Shenghui Silicone Rubber Products Co., Ltd., told the audience how to distinguish the common knowledge of advanced silicone rubber wooden door seals and inferior PVC wooden door seals. The following is a record of the manager of Gu Shenghui.

The basic function of the wooden door is insulation, energy saving, sound insulation, windproof and dustproof. The key point is the sealing, in which the function of the sealing strip is very important. The sealing material used in the market is generally PVC, and the plasticizer plays a key role in soft PVC. At present, relatively stable plasticizers are dioctyl phthalate and dibutyl acrylate. However, due to the high market prices, some unscrupulous traders have replaced them with cheap raw materials (waste oil, the remaining oil base of the refinery, etc.), which has brought great hidden dangers to consumers.

2013 12th International Exhibition

As the prices of various petrochemical products continue to rise, some irresponsible manufacturers have begun unfair competition in raw materials (so-called cut corners, shoddy goods). Talk about personal opinions on how to identify the quality of wooden door seals.

Traditional inferior PVC sealing strip product features:

1. Appearing on the surface of oil seepage, those waste oils are not compatible with PVC at all, the surface of the sealing strip is prone to oil, and the surface of the light-colored wooden door and the door leaf are also stained with yellow marks, resulting in product contamination and even production. A lot of volatiles pollute the air.

2. When the so-called plasticizer volatilizes or oozes out, the sealing strip loses its original softness, becomes very stiff, and quickly ages and contracts (length shrinkage, broken section shrinkage), so that the wooden door is closed. A part of the gap appears, the airtightness becomes very poor (water leakage, dust leakage), until the loss of the sealing sound insulation, the cost of air conditioning and heating is increased, and the life of the wooden door is greatly reduced due to the loss of the buffering effect.

In the process of making wooden doors, the input of seals accounts for a small proportion, but its role can not be ignored. So I don't think you should use fake and shoddy products to reduce costs. The advanced rubber sealing strip has incomparable advantages in environmental protection and performance, and has become the mainstream of the wooden door industry.

CIDE-2013 International Exhibition

How do you identify inferior PVC sealing strips and advanced silicone rubber sealing strips?

1. Use your nose to smell if there is any odor. The general PVC sealing strip will have a very pungent smell. The normal silicone rubber sealing strip has almost no taste.

2. At the same time, the PVC sealing strip and the silicone rubber sealing strip are placed at high temperature for a period of time (on the roof or in a sunny place). The PVC sealing strip will become soft in a short time, and the grease on the surface of the sealing strip will be deposited and contaminated. Dust, and yellowing (the oil is easy to absorb soil) oily, dirty hands. The physical properties of the silicone rubber sealing strip are unchanged. The household pressure cooker sealing ring is made of silicone rubber, which utilizes the high temperature resistance and non-toxic environmental protection performance of the silicone rubber. The physical properties of the silicone rubber in the working environment of 200 ° C have no significant change.

3. At the same time, the PVC sealing strip and the silicone rubber sealing strip are placed in the freezer of the refrigerator for a few hours. The PVC sealing strip will become very stiff and easy to break, and the physical properties of the silicone rubber sealing strip will not change. There is no significant change in the physical properties of silicone rubber at -50 °C.

4, some cheaper seal fillers will be a lot, so the surface will not be very bright, dull color, cut off the seal section will be very rough, feel stiff, pull almost inelastic. The silicone rubber sealing strip is bright in color, soft to the touch, extremely elastic in the pull, cut off the sealing strip, and has a broken cross section into a fine luster.

5, look at the proportion, how many meters per kilogram. PVC seal strip vendors are very versatile in the use of fillers. Some manufacturers are using fillers such as talcum powder and heavy calcium as a filler for the pursuit of greater production. This has greatly increased the proportion of seal products. (Our users generally buy in kilograms and use them by length.) This invisibly increases the cost and seriously reduces the quality, which is not worth the candle. Add a heavy calcium PVC seal that you stretch back and forth several times with a small amount of white powder on the surface. The density of PVC sealing strip should be 1.4-1.6. The silicone rubber sealing strip uses nano-scale silica as the filling reinforcing effect, the texture is light, and the density specific gravity is between 1.1-1.25, so the output rate is 20 more than the PVC sealing strip. %.

6, burning. PVC seals burn, foam, shrink, black pungent smoke, insufficient combustion, leaving a hard plastic residue.

The silicone rubber sealing strip burns almost smokeless, tasteless, burns well, and the burning substance is white powder.