The barbaric growth and vicious competition of rubber foam seals have brought great negative impacts to the rubber and plastics industry. Industry users and the media began to question the actual effect of rubber foam seals, which became cautious from the original advocacy.
Market sales have also slowed down in a few years, and even some areas have seen a decline in sales. At the same time that domestic rubber foam sealing strip enterprises are facing difficulties, foreign rubber foam sealing strip brands have entered the Chinese market in secret.
Of course, despite the chaotic state of the market, domestic big brands are rushing forward and gradually find their own development direction. A foamed sealing strip is a kind of sealing strip which is processed to have pores inside it by using the characteristics of certain materials.
It is divided into EPDM foam sealing strip, silicone foam sealing strip and PU foam sealing strip. The foam sealing strip is formed by microwave vulcanization technology at one time, and the surface is smooth and beautiful without any trace. Excellent elasticity and resistance to shrinkage and excellent aging resistance.
Excellent flame retardant function, low smoke and low toxicity; stable product function and high scale accuracy.
Rubber foam seal characteristics:
★Used the leading thermoplastic rubber Santoprene? (TPE) or NBR to combine with chlorosulfonated polyethylene;
★ Anti-ozone property, anti-UV optical rotation performance, good chemical resistance, wide temperature range (-60 ° C to 135 ° C);
★It has strong tear resistance and tear resistance. The temperature range is between -10 °C and 150 °C. After millions of twists and turns, it will not break.
★ Quickly restore the original appearance after compression, and maintain its original flexibility even in harsh environments;
★ Environmentally friendly rubber-plastic composite rubber, non-toxic, environmentally friendly, and pollution-free. Because EPDM sealant strips lack polarity and low unsaturation, it is suitable for various polar chemicals such as alcohols, acids, alkalis, oxidants, refrigerants, detergents, animal and vegetable oils, ketones and fats. Good resistance;
However, it is less stable in aliphatic and aromatic solvents (such as gasoline, benzene, etc.) and mineral oil. The function should also be reduced under the effect of concentrated acid for a long time. In ISO/TO 7620, nearly 400 materials with corrosive gaseous and liquid chemicals for various rubber functions are assembled.
And rules 1-4 indicate the degree of effect, the effect of corrosive chemicals on rubber function