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Laminated packaging material

A technology of packaging materials and thermoplastic materials, applied in the field of laminated packaging materials, can solve problems such as waste of raw materials and energy waste, and achieve the effects of reduced necking, firm combination, and long shelf life

Inactive Publication Date: 2013-05-15
TAIZHOU ZHUYE MACHINERY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All three solutions require the extruder die to be much wider than the width of the paper substrate and barrier layers, requiring more heat to heat and melt the thermoplastic material, wasting energy, and cutting off after lamination is complete Defects on both sides of packaging materials, resulting in waste of raw materials

Method used

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Embodiment Construction

[0022] Such as figure 2 As shown, a laminated packaging material of the present invention comprises an outermost layer 21 of thermoplastic material, a core layer 22, an intermediate layer 23 of thermoplastic material, a barrier layer 24, an adhesive layer 25 and an innermost layer 26 of thermoplastic material from outside to inside.

[0023] The thermoplastic middle layer 23 comprises metallocene catalyst-polymerized linear low-density polyethylene (MLLDPE) and low-density polyethylene (LDPE), wherein the metallocene-catalyzed linear low-density polyethylene (mLLDPE) has the following parameters: the average density is 0.88g / cm 3 ~0.925g / cm 3 , Melt flow index (190℃, 2.16kg) is 5g / 10min~20g / 10min, peak melting point is 85℃~130℃, expansion ratio is 1.2~1.8; low density polyethylene (LDPE) has the following parameters: average density 0.90g / cm 3 ~0.925g / cm 3 , Melt flow index (190℃, 2.16kg) is 5g / 10min~20g / 10min, peak melting point is 85℃~110℃, expansion ratio is 1.2~1.8, l...

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Abstract

The invention provides a laminated packaging material. The laminated packaging material comprises an outermost thermoplastic material layer, a sandwich layer, an intermediate thermoplastic material layer, a barrier layer and an innermost thermoplastic material layer from outside to inside, wherein the intermediate thermoplastic material layer is made of metalloscene-catalyst-polymerized linear low-density polyethylene (mLLDPE) and LDPE; for the metalloscene catalyst polymerized mLLDPE, the mean density is 0.88-0.925g / cm<3>, the melt flow index (190 DEG C and 2.16kg) is 5-20g / 10min, the peak melting point is 85-130 DEG C and the expansion ratio is 1.2-1.8; and for the LDPE, the mean density is 0.90-0.925g / cm<3>, the melt flow index (190 DEG C and 2.16kg) is 5-20g / 10min, the peak melting point is 85-110 DEG C and the expansion ratio is 1.2-1.8. Packaging containers with good sealing strength can be obtained by using the laminated packaging material, the percent of pass of the prepared packaging containers is high, and liquid food in the prepared packaging containers is long in quality guarantee period.

Description

technical field [0001] The invention relates to a laminated packaging material, in particular to a laminated packaging material for packaging liquid food. Background technique [0002] At present, disposable disposable packaging containers for liquid food have shapes such as bricks, squares, triangles, octahedrons with hexagonal cross-sections, and pillows. Usually, the laminated packaging materials used to manufacture these packaging containers include sequential layers. The outermost layer of thermoplastic material, the core layer, the middle layer of thermoplastic material, the barrier layer, the adhesive layer and the innermost layer of thermoplastic material, and there are also low-density polyethylene (LDPE) / printing ink layer / paper ( fiber) base layer / LDPE / aluminum foil AL / LDPE / LDPE, LDPE / printing ink layer / paper base layer / LDPE / LDPE, printing ink layer / LDPE / paper base layer / LDPE / LDPE, such as LDPE / printing ink layer / paper Laminated packaging materials with multi-lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B65D65/40B32B1/00
Inventor 吴壮
Owner TAIZHOU ZHUYE MACHINERY SCI & TECH
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