Five ways to identify the quality of sealing strips


Take a piece of rubber strip with your hands, pick up the thin part and pull it. The more force you use, the greater the amount of glue is, which may prove that the better its overall performance is.

Five ways to identify the quality of sealing strips

(1) Take a piece of rubber strip with your hands, pick up the thin part and pull it. The more force you use, the greater the amount of glue is, which may prove that the better its overall performance is.

(2) Hand-pull type, hold it in your hand like pulling a rope. First, check whether it can be broken, and secondly, whether it can rebound to its original length. The better the elasticity, which means that after installation in the future, it will not be deformed due to long-term closing pressure of the door.

(3) Fingernail scraping. If the material is not very good and the amount of glue is not high, the surface of the sealing strip will be easy to paint. After it is installed on the door, as long as there is a hard bump or a slight scratch, the image will be "broken." ", it is very unsightly, and many consumers will mistakenly think that the raw materials of the door leaf are poor.

(4) Visually, it all depends on the cross-section of the sealant strip. If it is bright and close to the surface color, it means that the material contains very little filler.

(5) Smell, if you smell an odor or a plastic smell, it is not suitable for use on wooden doors. Standardized rubber sealing strips should be odorless or have a slight scent of natural rubber (easy to identify when rolled into a roll). In the market, many illegal elements use recycled old cable sheaths as the main raw materials, and add some cheap Fangjing waste engine oil and heavy calcium powder to adjust the softness and hardness of the strips, and use fake and shoddy products to monopolize prices. Experts believe that such illegal products contain a variety of harmful elements that are harmful to the human body. When the weather is hot or exposed to the sun, a layer of oily substance often appears on the surface. The evaporated smell can cause people to faint or even cause cancer, and it is very easy to consume. It hardens, shrinks quickly, and changes shape with a light touch.

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The Difference Between Sealant Strips and Adhesives

The key difference between sealants and adhesives is that sealants generally have relatively lower strength and relatively higher elongation than adhesives. Because the main purpose of a sealant is to seal components and joints, the sealant has sufficient adhesion to the substrate and is resistant to natural conditions beyond the required service life of the components to maintain a tight connection. When the sealant sheet has different coefficients of linear expansion or elongation under different working pressures, it needs to have sufficient flexibility and elongation. Sealants generally have inert fillers and are generally configured with elastomeric materials to achieve the required flexibility and elongation. They tend to have a sticky consistency so as to fill in the differences between substrates. It often needs to be folded down after use. Sealants can be formulated into many adhesives.

Regardless of the application, sealant has three basic elements.

1. Fill the gap between two or several silicon wafers.

2. Form a natural barrier based on the physical properties of the sealant itself and through its adhesion to the material.

3. Maintain the life span of the sealing performance, service standards and environment.

 


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图片ALT信息: Jiangxi Fenfa Technology Co., Ltd.

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