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Guangzhou sino-bond State Organic Silicone Material Co., Ltd.
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ADD：Baiyun District of Guangzhou City bell off the town of bamboo red bamboo Road on the 29th
The difference between sealant and adhesive
TIME：2016-10-17 20:49:48
The main difference between the sealant and the binder is that the sealant usually has a lower strength and higher elongation than the binder. Because the main purpose of the sealant is to seal the components and connectors, the sealant needs to have sufficient adhesion to the substrate and is resistant to environmental conditions to maintain the required life span of the components of the joint. When the sealant substrate has a different coefficient of thermal expansion or elongation under different pressures, they need to have sufficient flexibility and elongation at break. Sealant usually contains inert filler, usually formulated with elastomers, to obtain the desired flexibility and elongation. They usually have a paste consistency in order to make the gap between the filled substrates. Applications usually require low shrinkage. Sealant can be formulated as many adhesives.
The sealing material between high strength adhesive at one end and at the other end of the low strength putty and caulking glue. Putty filling service has only one function - space and fill the void. Sealant, on the other hand, although there is no strong strength, to convey some of the properties. They seal the substrate in the glue line, and they are particularly effective in keeping the moisture out or out of the components they are used in. They provide thermal insulation and sound insulation, which can be used as a fire barrier; sometimes they contain electrical properties. They can also be used for smoothing or fillet. In short, the sealant is usually required in performing these functions a.
No matter what kind of application, sealant has three basic functions.
1 to fill the gap between two or more substrates.
2 to form a barrier, by the physical properties of the sealant itself, and by the adhesion of the substrate.
3 maintain sealing performance of life expectancy, service conditions and environment.