Shanghai Daoqin Plastics Co., Ltd.

         plastics film product types more, can according to its different features application in 农业, day use product, product, construction and water 处理, solar energy electrical, battery film, anti elastic and other more field/area.

         film molding

         plastics film molding methods has very more, its in 流延, extrusion, blow molding this types process relatively is Common:

        流延 method : through melt 流涎骤 cold process, production types tensile, non toward film. process production film in obvious orientation structure.

         extrusion method : Common has mono toward tensile and di toward tensile method. di toward tensile basic principle: high poly material raw materials through extrusion machine by add hot melt extrusion formed thick sheet/slice, again in 玻璃化 temperature degree above, melting point below/following temperature degree scope/range inner, through tensile machine rear toward and toward 进行一定倍数 tensile, make separation in 平行于 film upper orientation has 序 排列, rear in 拉紧状态 lower hot type, make orientation large separation structure solid 定, most rear cooling and rear 续处理 formed film.

         blow molding method : usually is extrusion blow molding method manufacturing, material material extrusion, formed tube/pipe 坯吹胀 molding, again cooling, 牵引, 卷取. blow molding film is has orientation. blow molding formed film process simple, is most commonly used formed film process. multiple film features

        HDPE

        HDPE film by is film or anti film. its melting point is 110℃-130℃, versus for density 0.918-0.965kg/cm3. is types crystallization degree high, non property thermoplastic property resin, 原态HDPE outer table/sheet white, in micro thin 截面呈一定程 degree semi transparent 状. tool has good resistant high low temperature property and impact resistant property, in -40F low temperature degree lower 亦如此. its chemical stability property, rigid property, tough property, machine strong/high degree, resistant strong/high degree property can very excellent, density upper rise, mechanical properties, retardant property can, resistant strong/high degree and heat resistant property versus improve/increase, can resistant acid, alkali, has machine solvent agent and other 腐蚀. method: more semi transparent, 手感似腊, plastics bag or scratch has 沙沙声.

        LDPE

        LDPE film density relatively low, soft/flexible, low temperature resistance property, resistant impact property chemical stability property relatively good, generally lower resistant acid (remove strong/high oxidation property acid outer), alkali, salt type 腐蚀, tool has good electrical insulation property. LDPE more use plastics bag, 标示材质符号 is ——4号, its products more application in engineering and use field/area, 如土工 film, film (棚 film, film, cover/cap film, film and other). its recycled material, material and other can again made formed waste 桶, tool 箱, 脚踏车踏垫, waste and other tool elastic property plastics again products. method: LDPE做 formed plastics bag relatively soft/flexible, 揉搓时 relatively 不会发出沙沙声, outer packaging plastics film soft easy is LDPE, relatively hard is PVC or PP film.

        PP

        普通PP film using/adopting blow molding, process simple, cost low, optical property can low 于CPP and BOPP. PP most large features is high temperature resistance (约-20℃~120℃), melting point high 达167℃, 适于装填豆浆, and other need gas products. its hardness relatively PE high, use manufacturing container bottle cover/cap more, 标示材质符号 is 5号. method: generally 说PP hardness relatively high, surface relatively has gloss, 燃烧时不 generate property odor, 而PE则 has relatively heavy wax 烛味.

        PVA

         polyethylene (PE) alcohol (PVA) high retardant composite/compounding film, is polyethylene (PE) plastics is 基材, will modified polyethylene (PE) alcohol water solvent property liquid coating in upper formed tool has high retardant property film. due to polyethylene (PE) alcohol high retardant composite/compounding film tool has good retardant property can, combined environmental protection requirements, therefore, types packaging materials market outlook/prospects separation light 明, in food industrial in has vast market 空间.

        CPP

        流延 polypropylene (PP) film (CPP) is through melt 流延骤 cold production types tensile, non toward film. it features is production speed degree fast, output/production volume high, film transparent property, gloss property, retardant property, soft/flexible property, thick degree uniform property good, can high temperature resistance 蒸煮(蒸煮 temperature degree in 120℃ above) and low temperature hot 封(hot temperature degree small 于125℃), property can balanced property excellent. rear as printing, composite/compounding 方便, widely used in textile product, 鲜花, food, day use product packaging, composite/compounding packaging inner 层基材, can long food shelf life, increase degree.

        BOPP

         di toward tensile polypropylene (PP) film (BOPP) is 20世纪60 year development 起 一 types transparent soft packaging materials, is use production will polypropylene (PP) raw materials and function property additives mixed combined, melt mixing/compounding, made formed sheet/slice 材, rear through tensile made formed film. this type of film not only tool has PP resin has density low, resistant property, heat resistant property good advantages, but also film optical property can good, machine strong/high degree high, Raw Materials 源丰富, tool has excellent printing property can, can and 纸, PET and other composite/compounding, tool has high degree and gloss degree, excellent and coating viscous force, high tensile strength, excellent retardant property can, low electrical features and other. in printing composite/compounding field/area application relatively 广, meanwhile in and other as is packaging materials.

        PET

         polyester film (PET) is types thermoplastic property engineering plastics. using/adopting extrusion method made formed thick sheet/slice, again di toward tensile made formed film material. polyester film features is mechanical properties excellent 良, rigid property, hardness and tough property high, resistant 穿刺, resistant scratch, resistant high low temperature, chemical resistant product property, oil resistant property, gas property and property good, is commonly used retardant property composite/compounding film 基材之一, resistant electrical property relatively 差, price relatively high. film thick degree generally is 0.12mm, commonly used packaging food packaging outer material, printing property relatively good. in plastics products in 标示材质符号 is 1号. its recycled material can again made formed: Monofilament → false 发, 拉链锯齿; thin sheet/slice → packaging box/case (蛋 box/case, tool L夹); polyester 棉→ filling 棉, 不织布, polyester material.

        PA

         nylon plastics film (polyamide (PA) PA) currently industrial production product types very more, its in use production film main/primary product types has nylon 6, nylon 12, nylon 66 and other. nylon film is types non tough film, transparent property good, tool has good gloss. resistant strong/high degree, tensile strength, resistant high low temperature property, oil resistant property, resistant has machine solvent agent property, wear resistance and resistant property very good, film comparison soft/flexible, retardant oxygen property excellent 良, for water gas retardant property relatively 差, 吸潮, wet property relatively large, hot property relatively 差. suitable for packaging hard property material product, 例如油腻 property food, products, food, true packaging food, food and other.

        PVC

        PVC film and PET advantages versus 似, tool transparent, gas, resistant acid features, many water packaging is using/adopting PVC bottle. 但PVC由於 manufacturing process can can separation mono polymerization full 而释放致癌 material, therefore 并不适於装填 food grade material 质, more already use PET bottle, 标示材质符号 is 3号. recycled material can again made formed: water tube/pipe 弯头, leather, electrical 线覆皮, anti building materials and other.

        PS

        PS film water property low, its dimensions property relatively good, can use 射模, pressure 模, pressure, hot molding processing. generally its is foaming made separation is foaming and foaming type. foaming PS main applications building materials, toys, tool and other, can Common made formed container filling 发酵乳 product (如养乐 more, 健健美, more more and other products or acid product) and other, in recent years a large amount of use made formed 免洗餐 tool, 标示材质符号 is 6号. recycled material can again made formed: can versus machine outer housing/shell, and other hard easy 碎, tool elastic property plastics again products.

        镀 aluminum

        镀 aluminum film tool plastics film and metal features. film surface aluminum function is light, anti outer 线照射, long inner material shelf life, also improve/increase film degree, from 一定程 degree upper aluminum 箔, tool has 价廉, and relatively good retardant property can. therefore, aluminum film in composite/compounding packaging in application separation 广泛, main applications dry and other drying, food packaging, and 一 医药, product outer packaging upper.