TPE(thermoplastic elastomer) seal strips

The raw materials of thermoplastic elastomeric seal is thermoplastic elastomeric for processing in accordance with its methods and mechanical properties named, as its composition and production process, the differences between the thermoplastic elastomeric. TPE is different. Thermoplastic elastomeric seal are thermoplastic processing, easy and quick without curing, processing and recycling can be repeated green products; it also has the function and nature of thermoset rubber (soft, flexible, tactile nature) .


Currently the largest amount of styrene thermoplastic elastomer is thermoplastic elastomer. It is made of plastic (usually polypropylene PP, PE PE, PS polystyrene) and styrene elastomers (eg SBS, SEBS, SEEPS, SIS, etc.) and plasticizer (mineral oil, naphthenic oil) and filler (calcium carbonate, talc, etc.) formed by twin-screw extruder granulation is made of thermoplastic elastomer styrene first of these components mixed in the mixing device, and then transported to the twin-screw extruder machine hopper, when through the barrel, the plastics and elastomers has melted, this time through the two screw fully dispersed and mixed, these components to fully integrated, the whole process is mainly from the physical changes. Saying the current line is also commonly referred to within the thermoplastic styrene elastomers TPE, TPR, in fact more appropriate name should be TPE-S.


And then there are thermoplastic vulcanizate (tpv) class elastomers. Its application relative to the thermoplastic styrene elastomer, the range is relatively narrow and biased in favor of industrial products in the field, it is mainly the lack of flexibility of thermoplastic vulcanized rubber formula, resulting in higher price. The initial commercial production by Monsanto (now AES Corporation, is a wholly owned subsidiary of EXXON) achieved in 1980. Thermoplastic vulcanizate composition to be divided according to PP + EPDM (PP + EPDM), PP + NBR (nitrile rubber), PA + ACM (acrylic rubber nylon +), the current 80% market share is PP + EPDM thermoplastic vulcanizate occupation (car doors, windows, doors and windows more areas of application). Process to point mainly by dynamic vulcanization of thermoplastic vulcanized rubber and thermoplastic vulcanized rubber physical blending current technology, the thermoplastic dynamically vulcanized vulcanized rubber technology is mature, stable performance. Since the main chain of EPDM is no double bond, so it is particularly resistant to climate (or called anti-aging / anti-ultraviolet / ozone), formed by the thermoplastic vulcanized EPDM rubber and therefore particularly resistant to aging. For thermoplastic vulcanizate containing vulcanized rubber particles have been, so it can withstand relatively high temperature, usually thermoplastic vulcanized EPDM rubber can withstand 135 ℃. Currently within the industry known as TPV.


For some conditions of use are not particularly demanding sealing products, PP / EPDM thermoplastic vulcanizates (TPV) is gradually replacing the traditional vulcanized rubber, especially in the need for timely delivery and high-volume production requirements, TPV better reflect the ease of processing fast, with TPV in this area therefore more competitive. With the increased environmental protection has become increasingly, elastomeric products, will also be biased in favor of TPV. In general, to 65 Shore A, for example, the temperature does not exceed 130 ℃, deformation requires no less than 35%, the tensile strength of not higher than 7MPa, oil requirements and vulcanized EPDM rather, you can rest assured that the choice of TPV.


Thermoplastic elastomer seal features

1. Excellent elasticity, toughness and strength, permanent deformation is small;

2. Excellent weather, ozone, ultraviolet, arc with good tolerance, can be comparable to vulcanized EPDM rubber;

3. And good resistance to high temperature, It still maintain good flexibility at -60℃, its performance does not change at 135 ℃;

4. The environmental performance of outstanding, non-PVC material, non-toxic, odorless, 100% recycling;

5. Low density, higher efficiency per unit weight;

6. Coloration is good, and can be made of strips of various colors;

7. Feel good, excellent surface quality;

product sample figure.