Shanghai Daoqin Plastics Co., Ltd.

         what is polyamide (PA) film （ nylon PA)?

        PA— separation 子链段 in has many heavy 复 酰 amine 基团(-CO-NH-) property high poly material, its specific gravity is 1.14g/cm3. polyamide (PA) (Polyamide, PA)指主链 upper tool has amine polymer, usually is nylon (Nylon).

         currently inner use nylon film is already inner amine ring polymerization to nylon 6 made formed, toward film. nylon film production molding process upper separation has: method (CPA), film method (IPA), di toward tensile method (BOPA). tensile method also separation is tensile and tensile types different process.

         nylon film belongs to toward film, toward film property can features is:

        A, 经纵横 toward tensile, polymer separation has high degree orientation, therefore hot property, 如BOPP, PET, BOPA and other;

        B, improve/increase crystallization degree, material force property can large large improve/increase, transparent degree improve/increase;

        C, 引发撕裂 strong/high degree very large, 但继发撕裂 strong/high degree large large reduce.

        1, is what nylon film easy 吸潮?

         nylon main/primary binary acid, amine or 由氨基 acid polycondensation formed. is polyamide (PA) separation inner has property amine 基, in production in is polyamide (PA) in separation can crystallization and separation 子配位, also has separation non crystallization polyamide (PA) property 基因 存 in, this separation non crystallization polyamide (PA) separation in amine can and water 配位, tool has water property, can absorption property very strong/high water separation 子, heavy in film surface formed water film, make nylon film retardant property and gas property large large decline.

        2, is what nylon film printing rear has generate color and color 渗透?

         color and color is different concept:

        1) color main/primary is in material small separation in temperature degree function lower 做剧烈 布郎运动, from 而脱离靠 micro low separation force formed 晶格,跟随 its it has machine separation 子一起做迁移运动, dispersion color;

        2) color 渗透则 is plastics printing upper lower combined, lower 边基材 surface by upper 面基材 printing 图案.

         main/primary causes is: printing has film plastics film polymer in, polymer/macromolecule 剧烈运动,形 formed has 间隙 孔隙,当 temperature degree rise high 时, its 孔隙也 expand large,而此时,颜 material separation 子也做剧烈 布朗运动, it 们就会 expand dispersion,透 孔隙形 formed 渗透. especially is color, color and other more easy color phenomenon.

        颜 material separation expand dispersion main/primary is in plastics film polymer/macromolecule hot 运动时 non crystallization inner 进行. nylon film, non type polyethylene (PE) and other type type film belongs to type plastics, due to it crystallization degree low, separation 子间隙 large, especially is in high temperature and wet degree large ring lower, easy hot deformation, water amount large, hot hydrolysis. therefore this category of type plastics film 就越容 easy certain color phenomenon.

        3, nylon film composite/compounding PE, lower machine 时剥离 strong/high degree also can, solid 化16h rear easy 剥离撕开 causes?

         has below/following types phenomenon:

        1) Raw Materials (printing material and hot material) electrical 晕面处理 degree is 否达标,(PA—52dny, PET—48dny, PE—40dny);

        2) printing and hot material additives (additives) more hot upper make composite/compounding degradation easy 剥离;

        3) upper amount 不够. generally small type bag 200g below/following has 2.5g/㎡, bag 应达3g/㎡, water bag 应达4.5g/㎡而蒸煮 bag 应蒸煮 bag large 于5g/㎡. (指 dry amount)参考GB/T10004---2008 standards;

        4)PE film slip agent amount high, additives content in 500PPm above, and film thick degree thick (60um above) additives add amount more 而引起剥离 degree low;

        5)熟化 conditions has combined requirements, or time short. various different viscous agent crosslinked 都不一样, is ensure water full crosslinked, need different grade water, different applications using/adopting different process;

        6) gas conditions. coating in understanding, generally ultra- 80% wet degree for/regarding dry composite/compounding is non 常不利, generally control in 23℃±3℃ and wet degree 65%±5%;

        7)胶 viscous agent inner in quality. is solid agent percentage content, generally solid agent percentage content less 于2%,配出 water viscosity need large 打折扣, its is solid agent ratio/proportion can large, large formed composite/compounding film 脆化撕裂.

        (无 solvent agent composite/compounding for solid chemical industry requirements non 常严格, another 讨论)

        4, is what nylon film composite/compounding CPP, formed product has 零星 起泡 phenomenon?

         this type of more is water bubbles high or is nylon film 受潮造 formed, and composite/compounding 层残留 solvent agent more 引起. in 南方潮 wet gas ring lower, this is packaging Common issues, this need add large 胶槽里胶 water ring amount, made bubbles 发生, or is add large printing and composite/compounding machine dry temperature degree, or in water increase large 于5% solid agent, but also gas good 时(wet degree small 于70%) printing good nylon film need upper composite/compounding, or use aluminum 箔纸包 good,建议不 need 搁置太久(5min以 inner), nylon film water 受潮, generate bubbles.

        5, nylon film use table/sheet composite/compounding again water easy generate causes?

         due to nylon water property, nylon film as table/sheet printing, composite/compounding again water or issues more large, heavy effect/influence strong/high degree, therefore generally water type viscous agent use resistant 121℃ below/following viscous agent. in BOPA/PE(115℃), BOPA/CPP121℃ structure in, can use resistant 135℃ 蒸煮胶 viscous agent, agent resistant temperature degree improve/increase 一 档次 and improve/increase upper amount. most good using/adopting has anti water coating more 理想, retardant water separation nylon film. nylon film rear has a small amount of phenomenon, make packaging bag generate Color Difference, need especially attention/notes.

        6, has BOPA film material combined, composite/compounding time rear generate bubbles 而BOPP则不会 causes?

        BOPA is types retardant property relatively good material, in printing composite/compounding process in solvent agent more, 经熟化不 can film 挥发掉而 still 残留于 film in, this is due to water separation and viscous agent in solid agent acid ester reaction, formed oxidation carbon is gas 体残留. 而BOPP retardant property relatively low, through 熟化,部 separation 残留于 film solvent agent from BOPP table/sheet 层挥发出. therefore, generally BOPP film composite/compounding rear generate bubbles less.

        7, OPA/AL/RCPP材质组 combined in 封口处 aluminum 箔出现 crazing fracture?

        BOPA film and aluminum is has 一定延展 property material, in processing formed packaging bag hot 封瞬间出现 破裂 phenomenon, generally is hot 封刀施 add to 包材 延伸 degree already ultra- 材 material can 接受 程 degree, therefore generate hot by pressure 破. is packaging di hot 封, also 应考虑 di 滚轮 凹凸形状 is 否 于尖锐而刺穿挤 pressure make aluminum 箔层破裂 formed crazing 状.

        8, use BOPA/AL/PE(15.07.60um) composite/compounding 时, made bag hot 封边沿 easy generate 脱层?

         due to made bag hot temperature degree relatively high, and generally 经二道 hot increase large hot 封位 受 hot temperature degree. in hot 封位置都 is 处于空白 transparent 状态. in film in low separation material (slip agent and other) in high temperature lower 会渗透 upper to upper, make viscous agent generate degradation 而脱层. 另一方面, AL in production process in 油污没 has 彻底清 remove dry 净, hot generate relatively large hot 间剥离距离而发生脱层.

        9, is what has nylon film combined, inner has bag printing ink easy color?

        材 material combined B0PA/AL/LDPE or PA/CPE. its 实,无论哪 types film combined has phenomenon generate. main/primary inner material 引起 褪 color. is inner has various product solid liquid food, its in chemical formed separation 同榨菜 bag 一样, very complex, has less is high force chemical material 质. is 此, inner can use LDPE or CPE, most good use resistant property good CCPP(流涎共 polypropylene (PP)) can resistant lower 10 degree 而不发脆, this 样渗透 to 墨层而起 chemical 变化概 rate small.