Shanghai Daoqin Plastics Co., Ltd.

         front 几天, 一位朋友老王跟我唠嗑儿, to small rigid rigid 进入国 inner certain plastics modified company from flame retardant direction modified formulation design as. 初入职场 small 王, is 抱怨感觉 need 做完美 flame retardant plastics formulation design, has that 么一点点“ difficult ”.

         its 实, day active in 我们会遇 to very more plastics product, large separation using/adopting resin belongs to easy or can material.

         is decrease/reduce and reduce polymer 燃烧引起 经济 loss and 人员伤亡, usually need for plastics product flame retardant modified 处理. flame retardant, upper is 延缓, made 燃烧 传播, decrease/reduce hot 引燃出现 frequency rate.

         flame retardant methods, types is in combined formed resin selection has 卤, 磷, nitrogen and other flame retardant raw materials, from make resin tool has flame retardant property can, essence flame retardant, due to flame retardant 元素 含 has amount usually 不会太 more, flame retardant has 限;另一 types simple easy methods is in resin in add flame retardant.

essence flame retardant copolymer ester combined formed 示意图(欧育湘 教授)

        材 material features and material specific heat capacity, hot rate, hot separation understanding temperature degree, hot separation understanding material, hot and other has very large 关系. lower 面我 跟 large separation lower plastics modified how to selection flame retardant and add amount issues.

        首先, for modified plastics flame retardant, basic add type flame retardant is 主, main/primary is its tool has formulation active, product types type more features. therefore, selection combined flame retardant formed comparison important issues.

         usually, can use method formed.

        第一步: is types material: PP / PA6 / PA66 / PC / ABS and other.

        第二步: flame retardant rating 确认: 5VA, 5VB, V0, V1, V2, HB, is can 滴落, oxygen index (LOI) requirements.

        第三步: is has requirements. (卤素 content <500ppm, also is =0?)

        第四步: remove flame retardant property can outer, other property can requirements, force property can, electrical property can and other.

         lower table/sheet is comparison Common modified material commonly used flame retardant. 当然, remove table/sheet in 列出, many new nitrogen flame retardant already by development or positive in development in. although very more new product has various issues, is research research in-depth, versus this new product very fast used for industrial production in.

         understanding commonly used flame retardant modified additives rear, again formulation design in flame retardant add amount, generally can based on already has data 确定. usually is, oxygen index (LOI) in 22-27 between belongs to self-extinguishing property material, can in in 燃烧, 但离火 self-extinguishing.

         oxygen index (LOI)

         oxygen index (LOI) is rigid good certain plastics material 燃烧 需 oxygen / nitrogen mixed combined gas in most low oxygen content separation 数, therefore oxygen index (LOI) by is oxygen index (LOI). oxygen index (LOI) small, this type of plastics material more easy 燃, 反之则不 easy 燃烧. gas in oxygen content in 21% left right, therefore usually is large 于22% 才 tool has flame retardant property.

         lower table/sheet is plastics to self-extinguishing flame retardant content.

         according to table/sheet in flame retardant content and self-extinguishing 关系, can flame retardant use amount. in, x is upper table/sheet in flame retardant content value;n is flame retardant 元素 数.

        举 例子 说: saturated and polyester 玻璃钢 flame retardant formulation how to design?

        不 saturated and polyester oxygen index (LOI) is 20.6, is easy material, selection bromine and oxidation is flame retardant. bromine molecular weight is 551.49, bromine versus for quality is 79.9, according to upper table/sheet data, x is 8, n is 6, according to upper 面公式:

        即100份材 material in 需 六 bromine flame retardant is 9.2份, 同理, oxidation need amount can light 松 计算出 is 2份. how 样, this 样一看, flame retardant modified formulation design is is has that difficult.

        当然, above formulation design is as is flame retardant material development process in 一点参考, process in flame retardant formulation design can can ratio upper process complex more. application ring different for/regarding flame retardant type is important factors. in addition due to resin and flame retardant selection different and flame retardant requirements different, flame retardant add amount need according to requirements design.