Shanghai Daoqin Plastics Co., Ltd.

        随 automotive light amount 化 不断推进, for/regarding glass fiber reinforced modified plastics has more more 关注. 今天就 and large 家聊聊 how to from equipment and process upper ensure glass fiber (GF) in resin in has long degree, 首先我们先 need understanding glass fiber (GF) modified in has long degree specific 意义.

         glass fiber (GF) in resin in most long degree

         glass fiber (GF) in resin in long degree short, to filler function, to reinforcement function (就 and CaCO3一样 效果, 亏死你);太 long, although reinforcement significantly, is effect/influence glass fiber (GF) in resin in dispersion property, molding processing properties and products use property can.

         therefore, generally is in thermoplastic property 树基体 in glass fiber (GF) long degree is its long degree 5倍. long degree is for/regarding to 定直径 fiber reinforcement thermoplastic property plastics in glass fiber (GF) 承受 应 force to its impact fracture 时 应 force value most low long degree.

        因 is in glass fiber reinforced plastics in, glass fiber (GF) long degree has to long degree can 传递应 force, to reinforcement material function, 否则就 is high CaCO3. is is 像武侠 small that 样“一寸 long, strong/high ”, is has most long degree. in addition, 就算找 to this most long degree value, can 100% ensure products in glass fiber (GF) has long degree is this value, is processing equipment and process for glass fiber (GF) most has long degree has very large effect/influence, good ratio, 你 裤子 sink marks. therefore, lower small to large 家聊聊 how to in equipment and process upper ensure glass fiber (GF) has long degree.

         equipment factors

        （1） screw type and machine 筒配置

         suitable for made glass fiber (GF) plastics di screw type design and machine 筒配置 总 target/goal is:

        ① anti 止基体 resin degradation, can make glass fiber (GF) uniform dispersion 于基体 resin in;

        ② ensure fiber by polymer melt most large degree lubricating wet;

        ③ will fiber short to most long degree, ensure mixed combined material to most large reinforcement 效果;

        ④ extrusion process in material can dry 净.

         glass fiber (GF) add 入出 螺槽应 using/adopting large 导程, make polymer 充满螺槽, 以流出足够 空间容 nano glass fiber (GF). in addition, is add by polymer 堵死, short glass fiber (GF) using/adopting 螺纹原 parts 导入, long glass fiber (GF) can use use less for combined parts 导入.

         glass fiber (GF) add lower screw type design has glass fiber (GF) long degree and 均化. long glass fiber (GF) is 无头, add screw rear must formed long degree and melt mixed combined very good, mixed combined 段应当由 distribution mixed combined parts formed, or thin combined 盘, mixed combined parts. short glass fiber (GF), main/primary is polymer melt will fiber wet dispersion, mixed combined can has thin combined formed combined block or in upper 开槽 螺纹原 parts or type parts formed.

        黏 degree high polymer or high glass fiber (GF) content (>40%) screw type ratio low viscosity polymer or glass fiber (GF) content low screw type provide force need and 一点, ensure glass fiber (GF) degree 折断.

        （2）排 gas 段 设置

         long glass fiber (GF) in add fiber is 经 石 wax emulsification type agent 处理, 而无捻 fiber is strong/high agent 处理. in temperature degree lower, in glass fiber (GF) in melt mixed combined rear, glass fiber (GF) upper agent and strong/high agent in extrusion process in high temperature rear formed 会发组 separation, 需设排 gas 段进行 troubleshooting. gas 段应位于 glass fiber (GF) add lower 游, in gas upper 游近排 gas 口处, 应设置密封 property screw parts, anti true function lower pellets by 抽出, toward 螺纹原 parts or toward combined block.

        （3） screw most rear 区段（均化 and pressure 段）

         is make mixed combined material extrusion pelletizing, using/adopting small positive toward 输送螺纹原 parts, 以建立 extrusion pressure. in gas and screw most rear between, has need 设置齿形盘原 parts, for fiber 进行均化, ensure glass fiber (GF) uniform distribution.

         process factors

        （1） glass fiber (GF) add 入

         long glass fiber (GF) and short glass fiber (GF) add using/adopting different methods.

        ① short glass fiber (GF) generally use amount add material plant/unit add 入, is short glass fiber (GF) long degree large 于6mm is, can using/adopting 振动计 amount add material plant/unit, will polymer and glass fiber (GF) mixed material add 入, 否则会造 formed fiber and resin separation 离. is improve/increase output/production volume, can using/adopting add material plant/unit add material add 入.

        ② long glass fiber (GF) comparison easy add 入, need especially add material plant/unit, need add long glass fiber (GF) di screw add material can.

        （2） glass fiber (GF) add 入 位置

         generally lower, polymer is in 第一(主) add material add 入, its melt rear, again will glass fiber (GF) in lower add material add 入, using/adopting rear add material. is rear add material, glass fiber (GF) is add to already melt polymer in, melt and fiber mixed combined rear, fiber 包起, to lubricated function, decrease/reduce fiber and resin mixed combined process in degree 折断, has glass fiber (GF) in melt in dispersion and distribution.

         summary

         in glass fiber (GF) modified especially is long glass fiber (GF) modified plastics process in, effect/influence glass fiber (GF) has long degree factors very more, upper simple analysis separation relatively is key/critical factors. therefore, most also is from product property can 进行反馈, process, equipment and formulation is 否恰当.