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TPE promotes new development of 3D printing materials

TPE promotes new development of 3D printing materials

We learned earlier that 3D printing now mainly uses ABS as the main substrate, but the softness of ABS material is very bad. How to make ABS material softer and more in line with user requirements? Add appropriate amount of thermoplastic elastomer (TPE material)! As early as last year, a "chemical copolymer of TPE and nylon" appeared, allowing users to print a wider range of flexible designs without the need for users to set the peripheral and internal fillers during slicing according to different nozzle sizes. So why is TPE material so closely related to 3D printing? TPE material is a copolymer based on SEBS. It has gained wide attention in the market with better comfort and softer tension. It is now widely used in "adult products, smart wearables, auto parts", etc. The field is modified high-quality materials. Adding appropriate TPE materials to the 3D printed hard glue can make the products more comfortable and meet the basic needs of people. The steady development of 3D printing is inseparable from more and more high-tech materials supporting it. New concepts and new technologies are used to promote the vigorous development of Chinese manufacturing. TPE materials are more in line with demand.

Post time:2020-04-14

Talking about the water resistance and oil resistance of thermoplastic elastomer TPE?

Talking about the water resistance and oil resistance of thermoplastic elastomer TPE?

Thermoplastic elastomer TPE water resistance or oil resistance determines the scope of application of elastomers, but it is rarely heard that TPE elastomers have good water resistance and oil resistance, either water resistance or oil resistance, or oil resistance and water resistance, just like fish and bear palms Get. Today, the author talks about the problems of water resistance and oil resistance of TPE, as well as the reasons for water resistance and oil resistance. Let me talk about the classification of thermoplastic elastomer TPE: styrenes, polyolefins, polyurethanes, polyesters, polyamides. The first two styrenes and polyolefins are regarded as general-purpose elastomer materials, and the last three polyurethane-based polyesters and polyamides are considered engineering-grade elastomer materials. The material, engineering grade oil resistance is very good, water resistance is slightly worse. This is related to the substrate or macromolecular structure of the material. TPE, TPR, TPO can be filled with oil regardless of whether the base material is SEBS or SBS or EPDM, because the butadiene section of SBS, the EB section of SEBS and the EP of EPDM can absorb oil and plasticize. Well. TPU, TPEE, and TPAE all have a polyester structure. Those who have learned organic chemistry should be very impressed by the reaction of acetic acid and ethanol to produce ethyl acetate. This is a reversible reaction. The reaction of ethyl acetate and water can also produce acetic acid and ethanol. Explain that ester can react with water, commonly known as hydrolysis, so polyester materials must be fully dried before use. Such as PA, PET, and TPAE, TPEE, etc.

Post time:2020-04-14

Disadvantages of thermoplastic elastomer TPE and rubber performance comparison

Disadvantages of thermoplastic elastomer TPE and rubber performance comparison

Thermoplastic elastomer products have developed rapidly in recent years. It is said that "the global demand for thermoplastic elastomers (TPE) will continue to grow at an annual growth rate of 5.5%, and the global demand will reach 5.8 million tons by 2017." It is "2013 global rubber demand was 11.32 million tons, and the global rubber demand growth rate in 2014 was 3.9%." It can be seen that the output of thermosetting rubber is about twice that of thermoplastic elastomers, although the growth rate of thermoplastic elastomers is faster However, it takes a long time to exceed thermosetting rubber. In addition to the price, in terms of product performance, thermoplastic elastomers also have their soft ribs, which is the main reason why the current output of rubber can be so high. So what are the soft ribs of thermoplastic elastomers compared to thermosetting rubber? 1. Insufficient resilience, compression deformation, and tear resistance The cross-linking of thermoplastic rubber belongs to physical cross-linking, and thermosetting rubber is an authentic chemical cross-linking, so it is far inferior to thermosetting rubber in terms of tensile strength, compressive strength resilience, tear resistance, etc. This is not easy Modification can be achieved, so in tire applications for automobiles, heavy vehicles, aircraft, etc., it is not related to thermoplastic elastomers, at least for the moment (I heard that there have also been cutting-edge researches on the application of thermoplastic elastomers and tires) 2. Insufficient high temperature resistance The reason why thermoplastic elastomers have superior processing properties of thermoplastic resins is that the physical crosslinking of thermoplastic elastomers disappears at high temperatures, but this is both an advantage and a disadvantage, so under long-term high-temperature conditions, some properties of thermoplastic elastomers will be greater Decreases in amplitude, for example, TPE products can maintain their strength and resilience within 80 to 90 ° C for a few hours, but if they take too long, they will soften and lose their use value. Still taking tires as an example, during continuous driving Even if the tire continues to heat up, it still needs to maintain good mechanical properties, which is obviously not suitable for thermoplastic elastomers; 3. The solvent resistance is poorer than thermosetting rubber Thermoplastic elastomers have poor resistance to mineral oil and polar solvents (such as toluene, gasoline, etc.). For example, TPE can be easily dissolved in toluene solution, and it will also swell or even dissolve in gasoline. Thermosetting rubber is at most swellable, NBR It is rubber with good oil resistance, so this is also a major shortcoming of thermoplastic elastomers.

Post time:2020-04-14

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