Shanghai Daoqin Plastics Co., Ltd.

        牛奶 is day active in non Common food. 但不知 large is attention/notes packaging 形式, especially is soft packaging 形式. 本文会针 for soft packaging brief analysis, for 准备投身 related industry has 启发.

         Common soft packaging separation is full soft bag packaging and composite/compounding packaging large type. this large type also can fine separation is dry types different type type. 我们会逐一 introduction.

         pure PE黑白 film

         pure PE黑白 film is most 早 牛奶 soft packaging 形式. generally using/adopting 三层共挤吹 film process production. according to equipment 情况, can use 五层, 甚至七层共挤吹 film structure production. 顾名思义, this type of film outer is white, inner is black. this design is is in outer 侧白底 upper table/sheet 印; meanwhile utilizing inner black achieve 一定避 light 效果, long shelf life. is high value inner material, therefore for packaging strong/high degree requirements relatively high. therefore use 1MI线 property a small amount of low melt high pressure production, meanwhile in hot 封层添 add amount metallocene ensure hot 封效果.

        EVOH共挤黑白 film

         versus for/regarding pure PE黑白 film, EVOH共挤黑白 film in add EVOH retardant 隔层. therefore less need 五层共挤 structure production. upper, very more already in use 七层共挤 structure production, 以便于 optimization formulation function design. adhesion resin selection is EVOH共挤黑白 film formulation design in need heavy 考虑 一点. selection bonding resin formed EVOH bonding force 不足, 脱层, can can generate water issues. versus comparison pure PE黑白 film, EVOH共挤黑白 film retardant property to large improves. therefore commonly used in 夏秋季, gas temperature relatively high lower packaging.

        屋顶包

        屋顶包 名于 it in 顶端形似屋顶 倾斜 design. this type of packaging appearance 漂亮, show/display good, but also easy 于开启. structure simple, generally is PE淋 film sheet/plate. is is PE淋 film process processing temperature degree high, therefore need odor low film PE production. due to has retardant property, therefore 屋顶包 suitable for need cold 藏储存 巴氏杀菌奶.

        利乐包

        利乐包 is year fast speed development packaging 形式. it is company 发明 一 types aluminum composite/compounding structure packaging. according to can fine separation is 利乐枕, 利乐砖, 利乐钻 and other. due to company patent to 期, in recent years inner a large amount of Domestic 利乐包 production 厂. 利乐包 包材都 is through more 头共挤淋 film process one-time processing formed.

        第一步: through LDPE淋 film composite/compounding will printing good and aluminum bonding to 一起, to “纸张/LDPE/ aluminum 箔” structure;

        第二步: in aluminum 箔侧共挤淋覆EAA/ hot 封PE, to “纸张/LDPE/ aluminum 箔/EAA/ hot 封PE” structure;

        第三步: in outer 侧淋覆LDPE保护 outer printing, to most product “LDPE/纸张/LDPE/ aluminum 箔/EAA/ hot 封PE” structure.

         due to 利乐包 背封处 is structure, therefore in packaging process in need use especially hot strip/profile reinforcement strong/high degree.

        康美包

        康美包由SIG发明推广. 康美包 包材 structure and 利乐包 similar, therefore upper can use more 头共挤淋 film equipment production. generally 说康美包 纸张 thick degree more thick, but also due to hot methods different 康美包 for hot 封PE requirements 也不一样. 康美包 hot is utilizing hot 风吹扫 hot achieve, therefore for hot low temperature property can requirements more high. therefore 康美包 hot 封PE generally need use polyolefin property can meet/satisfy requirements.