Introduction And Development Of PE Zipper Bag Material
Introduction and Development of PE Zipper Bag Material
PE Zipper Bag in the industrial development on the basis of the items of PE Zipper Bags have also been the corresponding development. From simple paper PE Zipper Bags, to single-layer plastic film PE Zipper Bags, the development of composite materials to the widespread use. Composite film can make PE Zipper Bag contents with moisturizing, fragrant, beautiful, fresh, dark, anti-penetration, to extend the shelf life and other characteristics, which has been rapid development.
Composite materials are two or more materials, after one or more composite process and combined together to form a certain function of the composite material. Generally can be divided into primary, functional and heat sealing layer. Grass-roots mainly from the beautiful, printing, moisture and so on. Such as BOPP, BOPO, BOPA, MT, KOP, KPET, etc .; functional layer mainly from the barrier, the role of dark, such as VMPET, AL, EVOH, PVDC; heat sealing layer and PE Zipper Bag items in direct contact, Resistance, permeability, good heat sealing, and transparency, such as LDPE, LLDPE, MLLDPE, CPP, VMCPP, EVA, EAA, E-MAA, EMA, EBA and so on. The following is a brief introduction to the development, development and present situation of the inner layer of composite soft PE Zipper Bag material.
LDPE, LLDPE resin and film
China's composite membrane is from the late seventies began, from the early eighties to the mid-term, China began to introduce some extruders, blown film and printing presses, the production of simple two or layer composite materials. Such as extruded composite BOPP / PE, paper / PE, pp / PE; dry composite BOPP / PE, PET / PE, BOPP / AL / PE, PET / AL / PE, etc., where LDPE resin and film, often Blending a certain percentage of LLDPE to enhance its strength and stiffness. Mainly used in instant noodles, biscuits, mustard and other food products PE Zipper Bags. LDPE resins are: Q200, Q281, F210-6,0274, etc .; LLDPE resin are: 218w, 218F, FD21H and so on. The LDPE resins are: IC7A, L420, 19N430, 7500 and so on.
CPP film, CPE film
From the late 1980s to the early 1990s, with the introduction of a new generation of soft PE Zipper Bag equipment and casting equipment, the scope of the contents of the PE Zipper Bag was further expanded, and the transparency requirements of some puffed food, cereal and other PE Zipper Bags High, and boil, high temperature sterilization products have to ask the city, the requirements of PE Zipper Bag material also increased accordingly to LDPE and LLDPE-based inner material has been unable to meet the requirements of these products. It is produced by casting method with good heat sealing. Oil resistance, transparency, fragrance and special low humidity heat sealing and high temperature cooking CPP in the PE Zipper Bags are widely used. On this basis, the development of aluminum CPP, because of its metallic luster, beautiful, barrier performance is also rapid and extensive use. As well as the casting method of CPE film, because of its one-way easy to tear, low temperature heat sealing, transparency is also good to be further use.
With the continuous development and changes in the PE Zipper Bag market, the special requirements for PE Zipper Bags are also more and more. DOW Chemical Company of the United States produced metallocene polyethylene MLLDPE with metallocene catalysis. Such as APFINITY, POP1880, 1881, 1840, 1450 and other resins. Then the United States of America Exxon. Japan's Mitsui, the United States Philip have also produced MLLDPE. Such as Exxon's EX-CEED350D60, 350D65, Mitsui Petrochemical E-VOLVE SP0540, SP2520, Philip's MPACT D143, D139 and so on. As MLLDPE and LDPE, LLDPE has good blending and easy processing, in the blown film or casting processing mixed MLLDPE, mixing ratio from 20% to 70%. The film has good tensile strength, impact strength, good transparency and good low temperature heat sealing and anti-pollution, with its inner layer of composite materials widely used in frozen, frozen food, shampoo, Oil, vinegar, soy sauce, detergent and so on. Can solve the above products in the PE Zipper Bag production and transportation of the PE Zipper Bag speed, broken package, leakage package, penetration and so on.