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TPE material color matching problem

Release time:

2020/07/27

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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.

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TPE,TPR material is maturely used in bicycle and motorcycle handlebar cover

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