Households on the use of seals why shorten it

Now home windows and doors on the doors and windows sealed more or less have appeared shortened problems, specifically what causes it, today I talk about why, For professionals, this saw will know what the reasons are, But there are a lot of people do not understand, in fact, this is not a difficult thing.vehicle seals

The first reason is that the doors and windows when the doors and windows sealed stretched, that is more than its own length, after some time it will return to its original length, so that doors and windows on the doors and windows sealed to shorten, The second reason is that doors and windows sealed province's problems, good quality windows and doors is not such a problem, the quality times will be shortened, discoloration, and even some steel profiles also appear on the yellow mark, it is because seal unreasonable proportion of raw ingredients, that in the case of unreasonable occurs without mutual decomposition of several raw materials synthesis of new molecular components, this will cause unstable performance, after a long period of sun and wind seal of the molecule will change. Say these two points is our common problem, EPDM seal, rubber seal, thermoplastic elastomers, etc. are basically two reasons.plastic truck seals