Shanghai Daoqin Plastics Co., Ltd.

  foaming plastics it tool has non more excellent features, use 起 也 is separation 方便. is foaming plastics it is separation formed multiple different types type. types type foaming plastics it tool has application industry is large same.

          一, what is foaming plastics

        foaming plastics is thermoplastic property or hot solid property resin is 基体, its internal tool has micro small gas plastics. foaming is plastics processing important methods 之一, plastics foaming to foam plastics has gas solid 两项— gas and solid 体. gas 体以泡孔 形式存 in foam in, and 泡孔互 versus formed is 闭孔, 连通 称 is 开孔, from has foam plastics and foam plastics separation. foam structure or is Raw Materials property can and its processing process 决定.

        foaming plastics

       二, foaming agent         

        foaming agent can simple coarse separation is material foaming agent and chemical foaming agent type.         

        1. material foaming agent        

        for material foaming agent requirements is: 无毒, 无臭, 无腐蚀 function, 不燃烧, heat stabilized property good, gas lower 不发生 chemical reaction, gas in plastics melt in expand dispersion speed degree low 于早空 gas in expand dispersion speed degree.

        2. chemical foaming agent

        chemical foaming agent is types hot can 释放出 gas 体诸如 nitrogen gas, oxidation carbon and other material 质, for chemical foaming agent requirements is: its separation understanding 释放出 gas is 无毒, 无腐蚀 property, 不燃烧, for products molding and material 理, chemical property can effect/influence, gas speed degree can control, foaming agent in plastics in tool has good dispersion property.

        三, foaming process

        1, material foaming method

        simple 讲, is utilizing material methods make plastics foaming, generally has types methods:

        a.先 will inert property gas in pressure lower solvent plastics melt or material in, again decrease pressure 释放出 gas 体, from in plastics in formed gas foaming;

        b. through for solvent polymer melt in low liquid 体进行蒸发 make 之汽化而 foaming;

        c. in plastics in add micro 球而形 formed foaming and other.

        material foaming method use material foaming agent cost versus for relatively low, especially is oxidation carbon and nitrogen gas cost low, also can flame retardant, 无污染, therefore application value relatively high; but also material foaming agent foaming rear 无残余 material, for foaming plastics property can effect/influence large. is it need specialized injection molding machine and equipment, technology difficult degree very large.

        2, chemical foaming method

        chemical foaming method is utilizing chemical methods generate gas make plastics foaming: for add plastics in chemical foaming agent add hot make separation understanding 释放出 gas foaming; another can utilizing plastics separation between versus 互发生 chemical reaction 释放出 gas foaming.

        using/adopting chemical foaming agent foaming plastics injection molding process basic upper and generally injection molding process same. plastics add hot rise temperature, mixed combined, and large separation foaming 膨胀都 is in injection molding machine in formed.

        总之, 不论选取哪一 types plastics raw materials, 也不论 using/adopting types foaming methods, its foaming process generally need 经 形 formed bubbles 核, bubbles 核膨胀, solid type and other stage/phase.