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2020-08-03
What is the material of TPU phone case? Will it turn yellow?
What is the material of TPU phone case? Will it turn yellow? Many users will give the phone with a "jacket" (phone case), so that accidentally dropped, can largely reduce the damage, these cases are also a variety of materials, such as silicone, plastic, resin, TPU, etc.. Today, Shangri-Li is going to explain the knowledge of TPU material phone case, mainly to answer the question of what material is TPU phone case? Is it soft? Will it turn yellow? How to do if it turns yellow? What is TPU phone case material? Polyurethane thermoplastic elastomer (TPU), also known as polyurethane rubber, belongs to a class of elastic polymer materials containing more carbamate groups (-NHCOO-) in the molecular chain. It is a plastic material that can be softened or changed repeatedly under certain heat, while at room temperature it can keep its shape unchanged can play the role of support and protection, and is widely used in shoe materials, adhesives, pipes, films, synthetic leather, wires and cables, instrument panels, cell phone cases, medical bandages, etc. If you are careful enough, you can find it on the fabric logo of some clothes and shoes. With the enhanced performance of TPU materials, sports equipment and shoes are increasingly inclined to TPU products, especially UV-resistant and transparent materials. Therefore, TPU materials have great potential for development in the field of sporting goods and sports footwear materials. Is TPU phone case hard or soft? TPU cases are soft, but silicone is a little harder and stronger, TPU is a block copolymer, and the ratio of hard to soft components determines the performance of TPU. TPU has excellent flexibility and resilience, from very soft to very hard, from good flexibility to great rigidity, or from hydrophilic type that can absorb moisture to water-repellent type that repels water, and maintain high elasticity in a wide range of hardness (Shore A10-D75), and in the same hardness Under the same hardness than other elastomers bearing capacity. Will TPU phone case turn yellow? Yes, if you buy a light color case such as transparent or white, it will turn yellow after three or four months at most. But if it only turns yellow without fogging or sticking to your hands, it means the quality of TPU case you bought is still good. The TPU case becomes yellow how to do? Either change, or stickers, or turn a blind eye. TPU phone case yellowing and the choice of raw materials have a relationship, aliphatic anti-aging properties than aromatic some good, in addition, you can add antioxidants and anti-UV additives to improve the problem of yellowing. The above is about TPU cell phone case is what material? Is it soft? Although TPU phone case will turn yellow, I still choose TPU case because it has high transparency and high wear resistance, outstanding bearing capacity, impact resistance and shock absorption performance. Shangli Plastic is looking forward to your call! Contact:139 2505 9389 Mr. Yan For more information, please see: http://www.dgshangli.cn http://1806260057.pool2-site.make.yun300.cn/product/16/
2020-07-27
TPE material color matching problem
TPE material color matching problem Recently, many customers are also consulting me about how to match the color of TPE materials, in fact, TPE materials are generally selected to color mixing color powder, because now the market, or no special for SEBS that is TPE particles specifically produced a masterbatch, the first TPE particles itself has its limitations, he is almost a modified material, but also belongs to the plastic class. Most TPE, TPR is transparent, translucent, this white, is very easy to color, should choose the appropriate color powder or color masterbatch coloring. Generally based on SBC. TPE/TPR is better than other types in coloring TPE/TPR materials. SBC-based TPE/TPR materials only need a small amount of color masterbatch to achieve the desired color effect, and the matched color is more pure and vivid than other types of TPE/TPR. It should be noted that the viscosity of masterbatch should be lower than that of TPE/TPR, because the melt index of TPE/TPR is higher than that of masterbatch, which is good for dispersion and makes the color distribution more even. 1) For TPE/TPR with SBS as the base, it is better to use polystyrene or EVA type color carrier. 2) For TPE/TPR with SEBS as the base, it is better to use polypropylene color carrier. 3) Softer TPE/TPR with SEBS as the matrix, it is better to use low-density polyethylene or ethylene vinyl acetate copolymer instead of polypropylene carrier, in order to avoid the hardness of the composite material being affected by polypropylene carrier. 4) SBS, SEBS are not allowed to use PVC as the base color masterbatch. 5) For some applications of overmolded TPE/TPR, polyethylene carrier should be avoided because polyethylene carrier may adversely affect the adhesion between TPE/TPR and the substrate. In fact, many times it is not only necessary to choose the color masterbatch. We also need to adjust the melt index of TPE, and familiarity with injection molding equipment is also essential. http://1806260057.pool2-site.make.yun300.cn/product/5/#c_product_list-15330035904672074-2
2020-07-22
What material to do the toy is safe
What material to do the toy is safe Most toys are based on synthetic resins, which can be divided into two categories: thermoplastics and thermosets. The former mainly has a chain-like linear structure that softens when heated and can be repeatedly molded, while the latter has a net-like body structure when formed, which cannot be softened by heat and cannot be repeatedly molded. In the toy industry, plastic and plastic is a kind of thing. Select plastic toys also pay attention to. * Wipe with cloth: qualified plastic toys, plastic on the coloring agent is usually used organic dyes and inorganic dyes, the use of high temperature coloring, even if you rub again hard will not lose color. * Finished product thickness: plastic toys can not be too thin, in general, there are corners or curves where the plastic wall should be thicker than the rest, so as to increase the bearing capacity of the toy when it falls to the ground without being destroyed. * Check the gap: screws and other fastening head can not protrude from the surface of the toy, flat head, round head wood screws should have countersunk holes. Plastic toys should be assembled to fit, there should be no gaps. * closed transmission mechanism: toys with transmission mechanism (gear drive, chain drive), such as all kinds of toy cars, its transmission mechanism should be covered, so that the baby's hands can not reach in. These safety materials can be found on the logo of the toy What material will be shown on the toy logo, in the purchase of toys, don't finish checking the toy logo, to find a trusted material, but also to choose a toy suitable for the age of the baby, which is also very important Oh. Shangri-Li Plastics is looking forward to your call! Contact:139 2505 9389 Mr. Yan For more information, please see: http://www.dgshangli.cn http://1806260057.pool2-site.make.yun300.cn/product/13/
2020-07-14
Is it better to use TPU for shoe soles than tire soles and why?
Is it better to use TPU for shoe soles than tire soles and why? TPU is only part of the support in the midsole, not the entire sole. The general sole is a composite of several materials. The outsole (that is, the part of the ground) is generally made of rubber, the tire sole that the questioner said should be the V-sole, very wear-resistant, but only part of the sole. TPU, plastic and carbon fiber are only the support part of the sole, which gives the shoe good torsional resistance and power transmission. So a shoe sole is a composite, different materials play different roles, should be considered. Shangri-Li Plastics is looking forward to your call! Contact:139 2505 9389 Mr. Yan For more information, please see: http://www.dgshangli.cn http://1806260057.pool2-site.make.yun300.cn/product/16/