Well-known engineering thermoplastic elastomer (ETES) has higher strength than rubber (generally 2-6 times).
As a result, engineering thermoplastic elastomers can replace rubber products in many applications, save material and processing time. Because engineering thermoplastic elastomers are "functionally equivalent" to structural plastics in thick or support areas and elastic in thin areas; they can serve as versatile materials in many applications. Flexural modulus of thermoplastic elastomers for chemical engineering ranges from 34.5 (about 3 times rigidity of rubber) to 1379 MPa (similar to rigidity of nylon).
1. It is a high-strength, high-performance material.
2. Its elasticity (elastic limit) and strength can be recovered between hard engineering plastics and rubber.
3. Their high elasticity is useful in applications that must quickly return to shape after continuous shock, vibration, bending - such as automotive bumpers, hinges, springs, snaps, balls, shock absorbers, flexible transmissions and seal.

 

This resin is a random block copolymer of crystalline hard segments of polyester and soft segments of amorphous diols. A range of resins can be made by varying the ratio of hard and soft segments.
Mechanical properties: Strength and stiffness of engineering thermoplastic elastomers are 2-6 times and 3-100 times, respectively, that of "typical" rubber (hardness of Shore A70).
Strength, stiffness and elasticity of general engineering thermoplastic elastomer resins are half, one third and three times that of unreinforced nylon, respectively.
Ultimate elongation of engineering thermoplastic elastomers is about 500%, and elastic limit is 7-25% strain (depending on different grades).
This resin has superior flex life, spring properties and creep resistance. It retains its properties over a wide temperature range.

A distinguishing feature of engineering thermoplastic elastomers is their very good dynamic properties. Properly designed parts undergo repeated tension and compression without losing their mechanical properties, can withstand millions of bending cycles (even at low temperatures of -40°F).

This resin has good toughness even at low temperatures. A softer, more flexible grade of engineering 13 thermoplastic elastomer that does not break in standard laboratory Izod impact testing and can be used as a resistance to polyester, vinyl, polyacrylate and styrenic plastics. Impact modifier.

Engineering thermoplastic elastomers perform well in temperature range of 40 to 300°F. Mechanical properties range from low to very high temperatures and are more stable than other thermoplastic elastomers and many rubber materials.

Engineering thermoplastic elastomers have good dielectric strength at 600 volts.
For example, in low-voltage lines, engineering thermoplastic elastomers can replace cross-linked polyethylene products with only one-third of thickness of insulating sheath. Therefore, both in terms of performance and economics, are very profitable.
Unmodified engineering thermoplastic elastomer with flammability is designated as UL's HB grade; mixing grade with additives is designated as UL94-2 and ULV-0 grade respectively.

Engineering thermoplastic elastomer resins have a high degree of chemical and heat resistance. High stiffness grade engineering thermoplastic elastomers perform best in hot hydrocarbon environments; ideal for use in hot oils, greases, fuel oils, and hydraulic oils. Engineering thermoplastic elastomers also have low permeability to fuels. Radiation resistance of engineering thermoplastic elastomers has great advantages in nuclear energy engineering and medical products (sterilization).

Engineering thermoplastic elastomers should be protected from ultraviolet radiation. UV-blocking additive and carbon black concentrate can be added by metered blending on molding machine.
Data from ten years of testing shows that properly stabilized resins can be used in all climatic conditions.
Due to flexibility of this resin, it must be taken into consideration to prevent its compression and deformation during ejection. Therefore, it is recommended to use a large thrust device with a large ejector pin and release plate, a mandrel.
Engineering thermoplastic elastomer resins can be molded to a Class A finish that reproduces mold surface. This allows production of painted automotive parts without secondary processing.

Engineering thermoplastic elastomers can replace many materials due to their combination of mechanical properties, resistance to environmental influences, ease of processing, and versatility in processing. Including: metal, leather, rubber and cast, reaction injection molded (RIM) polyurethane.
Products manufactured using it mainly include: auto parts, industrial products, and transportation tools. Consumer products, communications, business equipment, and medical products.
New markets have been opened up in painted automotive exterior parts. Including: dashboard, bumper skin, and veneer cladding, etc. Main reasons for this are low price, good surface properties and superior durability of engineering thermoplastic elastomers.
Another new trend is "injection moldable leather". Original replacement for leather was in footwear industry. Engineering thermoplastic elastomers can be injection molded into products with same texture and texture as leather, have high tear strength for easy sewing and bonding.