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CPE heat-sealing composite film and preparation method thereof

A technology of composite film and heat-sealing layer, which is applied in the field of plastic film packaging, can solve the problems of high bag breaking rate and inability to realize heat-sealing, and achieve the effects of high heat-sealing strength, enhanced retort resistance, and excellent processing performance

Active Publication Date: 2019-11-19
福建立邦包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] PET (polyethylene terephthalate), its chemical formula is [COC 6 h 4 COOCH 2 CH 2 O] n , containing polar groups, the printing effect of PET is better, and the chemical formula of PE is [CH 2 CH 2 ] n , does not contain polar groups, resulting in the inability to achieve heat sealing between the PET layer and the PE layer. In automatic packaging, it mainly appears in the form of back sealing. When lap sealing is required in packaging, it is often necessary to use corona treatment. Heat sealing, but when corona treatment is used for heat sealing, the sealing strength is less than 10N. When packing heavy contents, stress concentration points are prone to appear, and the bag breaking rate is high

Method used

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  • CPE heat-sealing composite film and preparation method thereof
  • CPE heat-sealing composite film and preparation method thereof
  • CPE heat-sealing composite film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1-3

[0053] In the preparation example 1-3, the nano-silica is selected from the nano-silica of the model A200 sold by Shandong Youso Chemical Science and Technology Strength Co., Ltd., and KH560 is selected from the KH560 with the product number of 0795 sold by Dongguan Kangjin New Material Technology Co., Ltd., EVA Selected from Mitsui Chemicals 7A60H, ULDPE selected from Dow DuPont 4701.

preparation example 1

[0054] Preparation Example 1: (1) Mix nano-silica and KH560, add it to ethanol pentahydrate, and stir at 90°C for 30 minutes, take it out, filter it with suction, and vacuum-dry it at 140°C for 2 hours. The mass ratio is 1:0.2;

[0055] (2) Mix EVA, POP and ULDPE, add silicone powder and nano-silica, stir evenly at a speed of 600r / min, extrude and granulate at 220°C to obtain a modified heat-sealing compound, silicone powder The mass ratio to EVA is 1:0.9, the mass ratio of EVA, ULDPE and POP is 1:0.9:0.6, POP is Dow 1900, the melt index is 500g / 10min, and the mass percentage of vinyl acetate in EVA is 19% , the melt index is 400g / 10min, the melt index of ULDPE is 1g / 10min, and the density is 0.913g / cm 3 .

preparation example 2

[0056] Preparation Example 2: (1) Mix nano white carbon black and KH560, add it to ethanol pentahydrate, and stir at 95°C for 25 minutes, take it out, filter it with suction, and dry it in vacuum at 145°C for 1.8h. Nano white carbon black and KH560 The mass ratio is 1:0.25;

[0057] (2) Mix EVA, POP and ULDPE, add silicone powder and nano-silica, stir evenly at a speed of 700r / min, extrude and granulate at 225°C to obtain a modified heat-sealing compound, silicone powder The mass ratio of EVA to EVA is 1:1, the mass ratio of EVA, ULDPE and POP is 1:1:0.65, POP is Dow 1950, the melt index is 800g / 10min, and the mass percentage of vinyl acetate in EVA is 19% , the melt index is 400g / 10min, the melt index of ULDPE is 1g / 10min, and the density is 0.913g / cm 3 .

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Abstract

The invention discloses a CPE heat-sealing composite film and a preparation method thereof. The CPE heat-sealing composite film includes a corona layer, an intermediate layer and a heat-sealing layerconnected in sequence. The corona layer includes the following components by weight: 64-68 parts of LLDPE, 18-22 parts of LDPE, 4-6 parts of POE, 2-4 parts of MPE, 0.8-1.2 parts of an anti-block slipping agent and 0.8-1.2 parts of a modified heat-sealing material. The intermediate layer includes the following components by weight: 78-82 parts of LLDPE, 8-12 parts of LDPE and 8-10 parts of HDPE. The heat-sealing layer includes the following components by weight: 8-12 parts of mLLDPE, 5-7 parts of a modified heat-sealing material, 18-22 parts of LDPE, 42-46 parts of LLDPE and 1.8-2.2 parts of aprocessing aid. The CPE heat-sealing composite film of the invention has the advantages of good heat-sealing performance in overlapping sealing, good drop resistance, and low bag breaking rate.

Description

technical field [0001] The invention relates to the technical field of plastic film packaging, more specifically, it relates to a CPE heat-sealing composite film and a preparation method thereof. Background technique [0002] CPE film has uniform thickness, surface gloss, transparency and heat sealability than PE film, and can be printed on both sides. It is mainly used as the inner layer of composite bags and the packaging of chemicals, pickles and pastries. [0003] In actual use, plastic films need to be printed. At present, the liquid solid automatic packaging films are mainly single-layer polyethylene surface printing films and printed composite films. The single-layer polyethylene surface printing film is printed on the surface of the polyethylene film, but because the LDPE molecule only contains C and H elements, does not contain polar groups, and has high crystallinity and low surface free energy, resulting in LDPE and The affinity of the ink is poor, the printing e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06C08L23/08C08L23/06C08L83/04C08K9/06C08K3/36C08K9/04C08K3/34C08J5/18
CPCB32B27/08B32B27/32C08J5/18C08J2323/08C08J2423/06C08J2423/08C08J2483/04C08K3/346C08K3/36C08K9/04C08K9/06C08K2201/011
Inventor 邓根生
Owner 福建立邦包装有限公司
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