Shanghai Daoqin Plastics Co., Ltd.

        TPE overmolding nylon PA, need adhesion very solid, this in inner is relatively difficult. need improvement bonding property issues, need from below/following several 方面入手:

        1. material 方面

        需 improvement TPE配 mixed system property (currently more using/adopting add grafting agent achieve), make property and PA接近, from 而利于 bonding. certain Model/Grade TPU and PA bonding property good, hardness 受限, usually TPU hardness in 70A above. need hardness more low TPE, also is need from improvement SEBS system property solution.

        2. combined 适 包覆 molding temperature degree.

        TPE molding temperature degree need high, most good can in nylon parts 包覆面形 formed 一定 熔接, that bonding property will large is improvement, molding temperature degree low, will for bonding 不利.

        3. attention/notes mold runner and 进胶口 design.

         for/regarding 包覆面积 large, 包覆位置 more product, amount more several 进胶口, decrease/reduce melt in mold inner time. time and 跑胶路径越 long, will large is reduce material melt temperature degree, from for bonding 不利. overmolding need is: (趁 hot) fast speed bonding.

        4. nylon parts preheating 烘烤.

         for/regarding using/adopting overmolding mold injection molding, non di color machine composite/compounding molding, 建议先 for nylon parts preheating or 烘烤处理, time 1~2 small left right, temperature degree 120~130℃. this more is TPE and nylon bonding provide more more can amount, 利于包覆 bonding.

        5. nylon parts 做凹槽, fine 孔, 包覆面进行 打 abrasion and other 处理.

         will has 利于TPE and nylon parts combined solid degree. this is material machine force achieve, is chemical bonding.