The developing direction of LDPE composite film products

Polar copolymer LDPE is LDPE maximum polarity is ethylene copolymer - Vinyl acetate copolymer ( EVA) 。 LDPE polar copolymer using ethylene as raw materials, the introduction of polar monomer, using high pressure method, peroxide trigger technology production, other copolymer and ethylene - Methyl acrylic acid copolymer ( EMAA) , ethylene - Methyl methacrylate copolymer ( EMA) , ethylene - Butyl acrylate copolymer ( EBA) , ethylene - Ethyl acrylate ( EEA) Copolymer has excellent transparency, oil resistance, resistance, printing and special performance, such as antistatic and adhesive. Ultra low density, low density products by metallocene catalyst and high pressure method ( Kettle or tubular) , has ene 1 or butene 1 ( Content of more than 20%) Copolymerization, the product side chain base long branches and high molecular weight, density of 0. 89g/cm3。 Ultra low density, very low density of the product is mainly used for geotechnical film, sheet, HDPE and impact modifier for PP blend resin, high impact strength, durable thorn, the flexural modulus low to 28 mpa, LDPE toughness, resilience, flexible, flexure life and EVA, good low-temperature impact resistance, film has better thermal viscous and heat sealing strength, workability and LDPE. The second generation LLDPE and the second generation LLDPE refers to has the mechanical properties of LLDPE and LDPE easy processing and transparent performance, adopting compound catalytic technology, three or four copolymerization of wide distribution of products. The second generation LLDPE production technology method, a double or multiple series of polymerization reactor, the reactor such as UnipolII more gas phase process, Borealis gas phase with loop, Phillips, multiple loop process and so on, this process the product cost is higher; The second is to use a single reactor, the use of two or more complex preparation of catalysts for easy processing of large peak or bimodal LLDPE, this method is the cost of production is lower than double reactor technology. Ultra low density, low density LLDPE ultra-low density, very low density special resin instead of LDPE, LLDPE for film strength and hexene LLDPE and ultra high molecular weight HDPE than beauty. The gas phase fluidized bed technology on foreign companies, Z - N/metallocene catalyst mixed butene copolymer wide distribution of production of ultra-low density products can reach 0. 900 - 0. 915 g/cm3, extremely low density products can reach 0. 880 - 0. 900g/cm3。 Sinopec tianjin ethylene plant development hexylene copolymer ultra low density polyethylene ( VLDPE） TJVL - 1210/0505 is the domestic first hexene copolymerization low density polyethylene, can be used to wrap film and composite packaging film, can also be used for PP alloy modification. Price is far lower than the POE products. Some large PP alloy modification of packaging film production companies and domestic well-known enterprises have formal use.