Shanghai Daoqin Plastics Co., Ltd.

         has resin or film product its solid has property can 不适应 its processing process requirements, need add additives its processing property;另 has material processing properties relatively good, product property can can to requirements, need add additives its product property can.

         film for additives requirements

         versus property

         versus property good, 会引发“迁移” phenomenon, performance in liquid additives in is “出汗”, performance in solid additives in is “喷霜”.

         has in for film requirements 不太严格时, can its versus property 欠缺一, filling agent and resin versus property good. need filling degree small, still can meet/satisfy film property can basic requirements, use coupling agent or surface active property agent 处理一 lower, can more good its function. is has improvement film surface property can additives 如开口 agent, anti-static agent and other, requirements its need micro has 一 迁移 property, make its in film surface function.

         resistant property

         requirements additives long in film in basic or very less loss 失, 而 additives loss main/primary through strip/profile 途径: 挥发, and 迁移. this main/primary and additives molecular weight large small, in in solvent understanding degree and in resin in solvent understanding degree has 关.

         processing conditions

         certain resin processing conditions relatively 苛刻, processing temperature degree high, 应考虑 选 additives is separation understanding, additives for processing equipment has 无腐蚀 function.

         film applications

         different applications film for additives odor, property, weather resistance, thermal properties and other has different requirements. 例如装 food plastics bag, requirements 无毒, use additives and generally packaging use plastics bag additives is different.

         additives combined in function and versus resistant function

         in resin system in, has types additives generate “协同 function ”. if combined 不当, has additives can can generate “ versus resistant function ”, this 样会削 low types additives function, make its function, 如炭黑 and type antioxidant use generate for resistant function.

         can film packaging property can additives

         increase agent and heat stabilized agent

         increase agent and heat stabilized agent can in very large degree upper improve/increase film material versus property.

         increase agent, 顾名思义 is increase material property, 一方面 make resin in molding flow property increase large, improvement processing properties, 另一方面 can make made formed rear film flexibility property and elastic property increase material 质.

         heat stabilized agent main/primary is improvement resin heat stabilized property.

         light stabilizer

         polymer/macromolecule material in cationic light, light and high can 射线 照射 lower, speed aging, performance is 发黄, 变脆, crazing, surface gloss, mechanical properties and electrical property can large large reduce, 甚至失 use value. in this complex bad process in, outer is for polymer/macromolecule material aging function main/primary causes. main/primary is cationic light in outer and large gas in oxygen for polymer large separation combined function 结果.

         light stabilizer function:

         can has absorption long is 290~410nm outer 线, remove or low outer 线, polymer/macromolecule material film 免受紫 outer and oxygen bad, long use lifespan, improve/increase material lightfast property. due to light stabilizer large more can absorption outer light, also light stabilizer is outer absorption agent.

         light stabilizer add amount:

         according to light stabilizer function mechanism, can will its separation is: light agent (颜 material), outer absorption agent, outer 线淬灭 agent, 自由基捕获 agent. this types function methods formed light stabilization in in-depth 四 层次.

         add light stabilizer rear, tube/pipe use amount less, its anti aging 效果却十 separation significantly, generally add polymer weight 0.1%~0.5%.

         antioxidant

         for/regarding large more plastics product types 说, in its manufacturing, processing, and application process in, for oxidation degradation has 一定 敏感 property, oxygen plastics film in and large more polymer can reaction 而导致 degradation or crosslinked, from 而改变材 material property can. a small amount of oxygen can make this polymer/macromolecule material strong/high degree, appearance and property can 发生剧烈 变化. in hot processing and day lower, oxidation speed degree more fast. therefore, usually also will polymer oxidation separation is hot oxidation and light oxidation. most rear this type of reaction 结果则 is property can aging. this category of reaction if retardant 止, can very fast make polymer oxidation use value.

         different plastics for oxygen stability property is different, therefore has plastics in add antioxidant. has must add antioxidant, antioxidant function is active property 游离基, make reaction in 断, is plastics oxidation process and speed degree.

         generally 说, amine type antioxidant anti 护效 can ratio type high, due to amine type in to light, oxygen function lower, different degree color, suitable for shallow color, color and 透明 film, therefore in plastics film in application relatively less.

         according to resistant oxygen 效果, will antioxidant separation is antioxidant and antioxidant. amine type resistant oxygen relatively good, 但污染 property relatively large, main/primary used for products;酚 type resistant oxygen 效果稍差, 但污染 property relatively small, comprehensive relatively good, more used for plastics film in. usually will alcohol or ester, acid ester 划归辅助 antioxidant, and antioxidant use, generate 协同效果, long antioxidant can.

         lubricant

         high poly material in melt rear usually tool has relatively high viscosity, in processing process in, melt high poly material in through narrow 缝, gate and other runner 时, polymer melt need and processing machine surface generate scratch, this scratch make melt flow property reduce, meanwhile heavy scratch make film surface coarse 糙, gloss or 出现流纹. is 此, need add improve/increase lubricated property, decrease/reduce scratch, reduce interface viscous property can is additives.

         lubricant remove flow property outer, also can melt promote agent, anti viscous and anti-static agent, slip agent and other function.

         outer lubricant function main/primary is improvement polymer melt and processing equipment hot metal surface scratch, it and polymer versus property relatively 差, easy from melt inner outer 迁移, therefore can in plastics melt and metal interface formed lubricated thin 层.

         inner lubricant and polymer has good versus property, it in polymer internal to reduce polymer separation inner poly force function, from improvement plastics melt inner scratch hot and melt flow property.

        实际每一 types lubricant has can achieve certain requirements function, is inner outer lubricated function, is in certain 一方面 more 突出一. types lubricant in different polymer in or different processing conditions lower performance different lubricated function, high temperature, high pressure lower, inner lubricant by pressure 出 而 formed is outer lubricant.

         in plastics film production in, 我们会遇 to viscous phenomenon, ratio in plastics film production in, film easy separation 开, this to high speed packaging belt/tape difficult. is it, can toward resin in add a small amount of increase surface lubricated property additives, increase external lubricated property, generally as anti-blocking agent or slip agent. generally lubricant separation structure in, has long non property and property 基两部 separation, it in different polymer in versus property is 不一样, from 而显示 different inner outer lubricated function.

         in extrusion molding 时, can high flow property, improvement polymer material and material and mold property, anti decrease/reduce material. another also can improvement film appearance and gloss. lubricant use amount generally in 0.5%~1%.

         selection attention/notes:

        1, polymer flow property can already meet/satisfy molding process need, main/primary outer lubricated function, ensure inner outer balanced;

        2, outer lubricated is has 效, it can in molding temperature degree 时, in plastics 面层结 formed liquid film is 准, in addition lubricant melting point and molding temperature degree 接近, need versus 差10℃~30℃方 can formed film;

        3, surface force small, viscosity small, in interface expand property good, easy formed interface 层;

        4, heat resistant property and chemical stability property excellent 良, in processing in separation understanding, 不挥发;不腐蚀 equipment, 不污染 film, has property.

         different types type lubricant use features:

        天然石 wax more use external lubricated, can as is multiple plastics lubricant, demolding agent, generally use amount 0.2~1phr, its versus property, heat stabilized property and dispersion property is very good, use amount can large, most good and inner lubricant use;而白油 more use 做PVC, PS inner lubricant, lubricated property can good, heat stabilized property very good, generally use amount 0.5phr. it is product, can used for food packaging. has types micro wax: in plastics processing in it by used as lubricant, use amount 1~2Phr, heat stabilized property and lubricated property ratio 普通石 wax good. low molecular weight polymer 也广泛 use lubricant, polyethylene wax, low molecular weight polypropylene (PP), its inner, outer lubricated property relatively good, 且无毒. polyethylene wax suitable for PVC and other material 挤塑, calendering processing, use amount generally is 0.1~1phr, can improve/increase processing efficiency, anti film viscous 连, improvement filler or material dispersion property, versus property and transparent property is very good.

         anti agent

         transparent plastics film, sheet/slice or sheet/plate 材, in wet ring in, wet degree to below/following 时, in its surface 凝结一层 fine micro water 滴, make surface 模糊雾化, retardant light 波 透, utilizing film packaging product 时, 也会因结雾而看不见 inner material, but also generate also easy formed inner material loss bad.

         anti agent classification:

        ▷ inner add type anti agent is in material add to resin in, its features is easy loss 失, can 持久, for/regarding crystallization property relatively high polymer difficult obtain good anti property;

        ▷ outer coating type anti agent is solvent has machine solvent agent or water in rear, coating plastics film surface, use 简便, cost low, resistant property 差, easy by or scratch 掉, has in inner add type anti agent 无效 场 combined or requirements property use.

         anti agent can can separation is anti property, anti property, low temperature anti property and high temperature anti property types, types anti property very difficult tool types 效果, is according to film for anti 雾效果 requirements, selection types combined use.

         anti agent tool below/following property can:

        1, anti can high, 生效迅 speed, resistant property good;

        2, heat stabilized property good, easy hot separation understanding, but also separation understanding material 不导致 polymer degradation;

        3, and its it additives combined property good, 不妨碍 its it additives function;

        4, effect/influence film transparent property, electrical property can, viscous property, resistant property and other function.

        几 types type anti agent:

        甘油 mono acid ester white wax material, can as is inner add type anti agent, tool has good anti property and low temperature anti property, suitable for food packaging film, in polyethylene (PE) in generally use amount is 1~1.5份, in polyolefin in is 0.5~1份.

        山梨糖 alcohol mono acid ester is color material, is inner add type anti agent, 生效迅 speed 持久, is inner add type anti agent, it is color solid 体, melting point is 60℃, can 持久, used for use film, can used for as food packaging materials, it in polyvinyl chloride (PVC) in use amount generally is 1.5~1.8份, in poly acid ethylene ester in is 0.7~1份.

         poly ring oxygen 乙烷(20)甘油 mono hard acid ester is inner add type anti agent, 生效极 fast, tool has good and low temperature anti property. it is color liquid 体, meanwhile has anti-static can, suitable for food packaging film.