Shanghai Daoqin Plastics Co., Ltd.

         soft packaging is in or inner material rear, container can 发生变化 packaging. use 纸, aluminum 箔, fiber, plastics film and it composite/compounding material made formed various bag, box/case, and other is soft packaging. mono film tool has different advantages, has 各自 不足. 例如, polyester film tool has very high strong/high degree and excellent oil resistant property, retardant gas property, property, anti property, is it hot property 差;而 polyethylene (PE) film anti property, hot property relatively good, retardant gas property, oil resistant property and other property can relatively 差. it in mono as is plastics packaging has property can upper defect, is will polyester film and polyethylene (PE) film combined 起, can maintain polyester film high strength and relatively good oil resistant property, retardant gas property, property, anti property, meanwhile film also tool has good hot property. composite/compounding film function is make more film composite/compounding in 一起, 既克服 mono film disadvantages, also combined film advantages formed is comparison packaging materials. another film rear composite/compounding, due to ink in film in 间, 墨层免受直接摩 scratch, 划伤以 and various property material 质 破 bad function, comparison good solution plastics printing in color, color issues, also ink 直接接触 food, product belt/tape safety issues.

         industry inner 说 “ composite/compounding ”实际 upper is “层 combined ” 意思, is will different property film through methods make its viscous in 一起, again combined to inner material function. soft packaging composite/compounding processing methods main/primary has dry composite/compounding, wet composite/compounding, extrusion composite/compounding, composite/compounding and other.

         dry composite/compounding

         in composite/compounding film various processing technology in, dry composite/compounding is most 传统, application most 广泛 一 types composite/compounding technology, widely used in for food, product, product, day use product, light product, chemical product, electronics product and other packaging. dry composite/compounding is use coating plant/unit (generally using/adopting 凹版网线辊 coating 布) in plastics film upper coating 布一层 solvent agent type viscous agent, film machine remove solvent agent drying, in hot pressure lower and other composite/compounding, film, aluminum and other bonding formed composite/compounding film, process process/workflow lower 图 示, due to it is in viscous agent “ dry ” 状态(无 solvent agent 状态) lower composite/compounding, therefore dry composite/compounding.

         dry composite/compounding combined used for multiple composite/compounding film 基材以 and film and aluminum 箔, between composite/compounding, application scope 广, resistant chemical 介质侵蚀 property can excellent, food in has alkali, acid, 辣, and other formed separation, product in has water, 香精, emulsification agent and other formed separation, chemical product in has solvent agent, and other formed separation, used for inner material conditions relatively packaging. its composite/compounding strong/high degree high, stability property good, product transparent degree high, can production high, in composite/compounding film, also can production cold 冻, or high temperature composite/compounding film; use 方便灵 active, as simple, suitable for more product types, amount less production. is, dry composite/compounding 自身也存 in safety 卫生差, ring 境污染, cost relatively high and other defect, meanwhile alcohol solvent property, water solvent property viscous agent development in 一定程 degree upper decrease solvent agent type viscous agent in safety 卫生, ring 境污染, cost pressure. dry composite/compounding in composite/compounding material processing methods in still very large specific gravity, stage/phase still is extrusion composite/compounding, wet method composite/compounding, solvent agent composite/compounding methods method composite/compounding processing methods.

         wet composite/compounding

         wet composite/compounding is in composite/compounding 基材(plastics film, aluminum 箔) surface coating 布一层胶 viscous agent, in viscous agent dry lower, through pressure and other material (纸, 玻璃纸) composite/compounding, again hot drying formed is composite/compounding film. wet composite/compounding features is process as simple, viscous agent use amount less, cost low, composite/compounding speed degree fast. wet composite/compounding method using/adopting viscous agent main/primary has polyethylene (PE) alcohol, silicon acid 钠, powder, poly acid ethylene, ethylene-vinyl acetate copolymer (EVA), polypropylene (PP) acid ester, resin and other. wet composite/compounding machine as principle and dry composite/compounding basic versus 似, different is dry composite/compounding is will coating viscous agent film 经 烘道 add hot, viscous agent in has machine solvent agent rear, again and composite/compounding material hot pressure bonding;而 wet composite/compounding method is will coating viscous agent film and composite/compounding material composite/compounding rear, again 进入烘道进行 drying.

         use wet composite/compounding 时, types in less has types is more property material (如纸 or sheet/plate), 以便胶 viscous agent in dilute agent in drying 时挥发出. therefore wet method composite/compounding used for 纸/ fiber, 纸/纸, 纸/纸 sheet/plate, 纸/ aluminum and other material composite/compounding.

         extrusion composite/compounding

         extrusion composite/compounding is will polyethylene (PE) and other thermoplastic property material in extrusion machine inner melt rear 挤入扁平模口, formed is sheet/slice film rear and types or types film through cooling and composite/compounding pressure composite/compounding in 一起. and other composite/compounding methods versus ratio, extrusion composite/compounding tool has equipment cost low, investment less, production ring 境清洁, composite/compounding film can in solvent agent, production efficiency high, as and other advantages, extrusion composite/compounding in plastics composite/compounding processing in has very important 位置. extrusion composite/compounding film can use extrusion coating and extrusion composite/compounding types methods made.

         extrusion coating film

         extrusion coating is will polyethylene (PE) and other thermoplastic property plastics melt rear from machine 头流出, in 紧密接触 两 辊筒间 will its pressure toward types 基材, cooling rear made formed composite/compounding film types methods. 放卷基材 generally is already printing PET, BOPP, and other material, 如方便面 packaging bag is extrusion coating production type 例子, its structure: BOPP printing film / LDPE(or PP).

         extrusion composite/compounding film

         extrusion composite/compounding is will extrusion resin in types in 间, it to will types 基材结 combined in 一起 胶 viscous agent function, meanwhile is composite/compounding 层. 第一基材往往 is PET, BOPP, PA, and other material, 第二基材 generally is LDPE, CPP, aluminum 箔, aluminum film and other material, extrusion resin generally is PE, PP, EVA, EAA and other resin. generally 普通洗衣 powder packaging film can use method composite/compounding, structure lower: BOPP printing film / extrusion resin / PE film.

        无 solvent agent composite/compounding

        无 solvent agent composite/compounding in use viscous agent, its has machine solvent agent 而备受关注, in and other 发达国家, solvent agent composite/compounding already formed is soft packaging composite/compounding material production main/primary methods. it is using/adopting solvent agent type viscous agent coating 布基材, will its and 第二基材进行贴 combined types composite/compounding methods, dry composite/compounding use viscous agent, its viscous agent in has machine solvent agent, 无需烘 dry plant/unit. due to its excellent ring good property, product property can can to dry composite/compounding 一样, is will development direction.

        共挤 composite/compounding

        共挤 composite/compounding, is will types or types above different plastics, through or 者两台 above extrusion machine, separation make various plastics melt 塑化以 rear 供入一副口模 or through separation device will various extrusion machine to plastics combined rear 供入口模, made composite/compounding film types molding methods. this 里 讲 different plastics, can is different types type plastics, can is types type different grade plastics, or 者同一 grade different formulation plastics. composite/compounding cost low, can ratio dry composite/compounding reduce 20%-30%, and composite/compounding process in use bonding agent or coating agent (AC agent), therefore property good, has ring 境污染 issues. is material made obvious, used for composite/compounding process production composite/compounding film 仅限于 various thermoplastic property plastics, need aluminum 箔, and other composite/compounding material can using/adopting composite/compounding methods production. another, can in composite/compounding film printing, film need printing can will 图案, and other printing to composite/compounding film surface.

        综 upper 述, above various composite/compounding processing methods has advantages and 不足, from 我国现 stage/phase development 情况 看, dry composite/compounding application scope most 广, specific gravity most large, meanwhile extrusion composite/compounding development speed, specific gravity 仅次于 dry composite/compounding, wet composite/compounding and composite/compounding process material made property relatively large method formed is 主流, solvent agent composite/compounding technology although in 发达国家 already formed 熟, in also basic 处于起步 stage/phase, is will composite/compounding processing methods development direction.