Patent name: A packaging material and its preparation method Patent applicant Beijing Lianbin Plastic Printing Co., Ltd. Principal Applicant Address 102605 Inventor Jiang Zhihong of Qingyundian Town Industrial Zone, Daxing District, Beijing Application (Patent) No. 200410078123.3 Application Date 2004.09.17 Certification Date Audit No. 1748997 Approved Announcement Date 2006.03.22 Manual Disc No. D0612-1 Main Classification No. B32B27/08 (2006.01) I Classification No. B32B27/08 (2006.01) I; B32B27/32 (2006.01) I; B32B27/20 (2006.01) I; B29C47/06 (2006.01) I Division of the original application No. priority Abstract This invention discloses a packaging material, divided into three layers, the outer layer of LDPE, LLDPE, MPE, white mother, open smoothing agent, It is made of lubricant; the middle layer is made of LDPE, LLDPE, MPE, white mother, black mother; the inner layer is made of LDPE, LLDPE, MPE. The preparation method includes the following steps: feeding the raw material with a hopper, heating and melting the screw, extruding the extruder, inflating into a bubble, and extinguishing the bubble by pulling the film roll, dicing and winding. The plastic taste is light; the friction coefficient is small, the handle is smooth and soft, the gloss is good, the tensile strength is increased, the barrier property is good, and oxidation is not easy; it is not easy to absorb static electricity. Sovereign item 1, a kind of packaging material, divided into three layers, characterized in that its raw material composition and its weight ratio are: Outer layer: LDPE, LLDPE, MPE, white mother, open smoothing agent, lubricant weight distribution The ratio is 45-55: 150-200: 22-27: 60-70: 1.8-2.2: 1.4-1.6; middle: LDPE, LLDPE, MPE, white mother, black mother and its weight ratio is 45-55: 180- 220:22-27:1.8-2.2, 15-17; Inner layer: LDPE, LLDPE, MPE weight ratio of 45-55: 110-130: 70-80 in the raw material, LDPE is high pressure low density polyethylene The use of LD100, LD165, LD605, LD104 or F222; LLDPE linear low-density polyethylene, using 21HS, 1001,1220 or 2230; MPE metallocene, using 1018, SP2520 or 2045; white mother with FOK96, FOK90, 2001 or 3001; black mother is 4681; opening slip agent is SHPE-6; lubricant is SPE-2.
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