Hebei Qinghe Hongfeng vehicle parts Co., Ltd. is a professional R & D company specializing in all kinds of sealing strip series products. It has established reliable supply and demand and long-term cooperation with more than 200 plastic steel doors and windows, glass curtain wall decoration companies, automobile, train, aircraft and ship manufacturers in Beijing, Tianjin, Shanghai, Guangzhou, Shenzhen and Qingdao. The products are widely used in automobile, ship, electrical appliance, construction, refrigeration, decoration and other industries. At the request of our customers, we have recently set up an external wholesale and retail joint venture business. Our high-quality products and good services have won the trust of our customers.

First, scrape with your fingernails. The surface of the sealing strip with poor material and low adhesive content is easy to turn white. If such a sealing strip is installed on the door, it will become ugly if it encounters hard objects or is slightly damaged.

Second, high temperature test. Wrap the sealing strip on the profile as firmly as possible, place it under high temperature for a certain time, and confirm whether the contact surface between the profile surface and the sealing strip is stained and discolored, whether the dust on the sealing strip surface is yellowing, whether the hands are dirty, and whether the sealing strip is of good material.

Third, smell. Smell it with your nose. Ordinary PVC materials only have a little alcohol smell, which can be almost ignored.

Fourth, pull by hand. Holding the sealing strip in hand, two people pull one end of the rope to both ends, first to see if it can break, and then to see if it can rebound to the original length. The higher the elasticity of the sealing strip, the better the performance. Tear a sealing strip with its thinnest part. The harder you use, the higher the rubber content. The comprehensive performance of the sealing strip is very good. You can consider buying it.

Fifth, weigh the sealing strip with the same material. The same amount of sealing strip is light if its material is excellent. If talc and heavy calcium are added to the sealing strip to increase the weight of the product, it will be much heavier than the regular addition of light calcium carbonate. In addition, since the sales of sealing strips are evaluated by weight, when selecting sealing strips, it is necessary to put the specific gravity on the sealing strips of the same material and model.

Sixth, observe the surface. Because there are many cheaper sealing strip fillers, the surface is not too bright, and cheap and bright things are not desirable. In addition, observe the cross-sectional joint of the sealing strip, and check whether the brightness of light is close to the color of the sealing strip surface. In recent cases, the sealing strip material contains very little filling material, so you can choose to buy it.