The classification of soft packaging and materials

In the national packaging general terms ( GB4122— 83). , flexible packaging is defined as: flexible packaging refers to after filling or remove the built-in container shape can change of packing. Paper, aluminum foil, fiber, plastic film and their compounds made all kinds of bags, boxes, set for flexible packaging, coating, etc. According to the material classification: laser aluminized film compound paper material, laser transfer paper, paper composite materials, aluminum composite material, plastic composite material, fabric composites, etc. According to the packing in the form of classification: three autoregulating, yuanyang bag, seal, organ bags, self-supporting bag, zipper bag, eight autoregulating, straw bags, special bags, cover material, labeling, etc. According to the production process categories: dry composite membrane, extrusion ( A total of extrusion) Composite membrane, solvent-free composite film, laminating, etc. Classified by function: high separation membrane bags, cooking membrane bags, anti-static film bag, antibacterial film bag, anti-fog film bag, vacuum bag, bag, resistance to chemical oxygen packaging film bag, air bag packaging film, etc. Packaging material 1, LDPE, LLDPE resin and film production simple floor or of the layer of composite material. Such as extrusion laminating BOPP/PE, paper/PE, pp/PE; Dry type composite BOPP/PE, PET/PE, BOPP/AL/PE, PET/AL/PE, etc. , including LDPE resin and film, often blending proportion of LLDPE, in order to enhance the strength and stiffness. Mainly used in instant noodles, biscuits, preserved szechuan pickle food packaging. General coating grade of LDPE resin have; IC7A, n430 L420, 19, 7500, etc; Blown film grade LDPE resin: Q200, Q281, F210 - 6, 0274, etc; LLDPE resins are: 218 w, 218 f, FD21H, etc. 2, CPP film, CPE film as a new generation of the introduction of flexible packaging equipment and stretch film, packaging inclusions to further expand the scope of, some of the transparency of puffed food, cereals and other packaging requirements higher, and boil, high-temperature sterilization products and the introduction of successive also increase accordingly to the requirement of packaging material, lining material is given priority to with LDPE and LLDPE can not meet the requirements of the above products. Use LiuYanFa production has good heat sealing. Oil resistance, transparency, and the special low damp and hot sealing and high-temperature cooking CPP is widely used in the packing. On the basis of the development of aluminium coated CPP, because of its metallic luster, beautiful, blocking performance quickly and also used in abundance. And using LiuYanFa producing CPE membrane, because of its ChanXiangYi tearing resistance, low temperature heat sealing, good transparency is also further use. 3, MLLDPE resin as the packaging market developing and changing, to the special requirement of the packaging is also more and more. The DOW chemical company with metallocene catalytic polymerization production of metallocene polyethylene MLLDPE. Such as APFINITY, POP1880, 1881, 1840, 1450 resin, etc. Then the United States exxon. Japan's mitsui, the United States Philip MLLDPE and production. The EX - such as exxon CEED350D60, d65, mitsui petrochemical E - 350 VOLVE SP0540, SP2520, Philip MPACT D143, D139, etc. Because MLLDPE and LDPE, LLDPE, good blending and workability, can be mixed in blown film and stretch film processing MLLDPE, mixing ratio from 20% to 70%. Such membrane has good tensile strength, impact strength, good transparency, and good low-temperature heat sealing and stain resistance, with the inner lining of the composite material is widely used in refrigeration, frozen food, shampoo, oil, vinegar, soy sauce, detergent, etc. Can solve the above mentioned products in packaging packaging speed, torn bags in the process of production, transportation, leakage, seepage, etc. 4, tectorial membrane lining material jelly, juice, yogurt, fruit milk, liquid liquid packaging cup, etc. Bottle, its main material is HDPE. PP, PS etc. Cover of the packaging film, both must consider shelf-life, also want to consider to cover film between the glass and heat sealing strength, consider consumers use convenient & ndash; — Easy tear. Achieve the particularity, the inner material only with cup, the formation of interfacial bonding strength, but can't completely penetration, fusion together. Using the modified EVA resin. Such as the United States dupont APPEEL53007. Toyo TOPCO L - 3388, the French LOTRYL 20 ma 08, Japanese HIRO. DINE WT231, etc. The structure can be as follows: PET/PE/HM, BOPA/PE/HM, PET/VMPET/PE/HM, PET/AL/PE/HM, paper/PE/AL/PE/HM. For cover film and bottom lid tightly, not tear, general requirements bottom cup material and tectorial membrane lining material is consistent, so that the two kinds of materials when heat sealing completely fusion. Such as HDPE cup cover the membrane lining material: LDPE or EAA; PP cup, the lid of the membrane lining for CPP film; PET bottle, we have found a after coating modification of PET film as the heat sealing layer, block pesticide PET bottle, achieved satisfactory results. 5, co-extrusion film with single LDPE/LDPE blend with other resin production of thin films, the performance of a single, cannot satisfy the requirement of modern development of packaging items, thus by co-extrusion blown film or co-extrusion flow delay co-extrusion film production equipment, improve the comprehensive performance. Such as the membrane properties, mechanical strength, heat sealing and heat sealing temperature, barrier property, open sex, stain resistance, such as comprehensive performance improvement, and the processing cost is reduced, is widely used. Such as H co-extrusion blown film layer of hot melt adhesive film, PE/HM, cable membrane PE/EAA, MLLDPE low-temperature heat sealing film, EVA cover film and antistatic film, smooth film.
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