How to distinguish the quality of rubber seals_Rubber seals_Rubber seal manufacturers

How to distinguish the quality of rubber seals?  The performance of rubber seals largely affects the air tightness, water tightness, heat loss and other important performance indicators of doors and windows and the firmness of doors and windows. To this end, the country has long formulated the national standard GB12002-89 'Seals for Plastic Doors and Windows'. To standardize the production and inspection of rubber seals.  However, the quality and price of rubber, plastic and rubber seals for doors and windows in the building materials market are very confusing. The expensive ones are 15,000 or 6,000 yuan per ton, and the cheap ones are only 6,000 yuan per ton. The price difference is nearly 10,000 yuan, and the quality varies greatly, which makes people at a loss. Many rubber seals seal manufacturers claim that their products are in compliance with the GB12002-89 national standard, and can issue test reports qualified by authoritative institutions. According to the provisions of GB12002-89 standard, the heating weight loss index in the hot air aging performance item of rubber seals should be ≤3%. However, the heating weight loss of the actual test results is: 7.17% to 22.54%. far beyond the scope of national standards.  Such rubber seals have a large amount of low-boiling plasticizers or substitutes for plasticizers added to the formula. Such rubber seals have good elasticity and softness when they are new. However, over time, when the plasticizer volatilizes more, the elasticity and softness of the rubber seals will deteriorate, which will affect the sealing performance of doors and windows in light, and will also affect the firmness of door and window assembly.  In addition, the rubber seals seal with too high plasticizer content will also migrate to the PVC profile in contact with it during use. Causes local coloring and swelling of the frame and fan profiles. That is, on the sealing surface of the profile in contact with the rubber seal, there is a dark stain of different width, which cannot be wiped off or washed off, which forms a strong contrast with the white profile body, which greatly affects the appearance. At the color stain, it is partially raised due to the migration of plasticizer. (For sliding doors and windows, since the contact part between the rubber seal and the profile is not exposed, the local coloring and swelling of the profile cannot be observed under normal circumstances. When the casement door and window are in the open state, the rubber seal is out of contact with the corresponding profile, and the profile is partially The coloring and swelling phenomena are fully exposed.) Although the local coloring and swelling of the profiles will not cause serious consequences of the failure of the frame and fan profiles, it seriously affects the appearance of plastic doors and windows. After all, this is a defect, after all, it will have an extremely bad influence on the image of plastic doors and windows.  Ruichen Sealing specializes in the production of rubber seals, single hydraulic prop seals and other seals, if you have product needs, please call to order.
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