Laminated packaging material

A technology of packaging materials and thermoplastic materials, applied in the field of laminated packaging materials, can solve problems such as energy waste and raw material waste, and achieve the effects of reduced necking, good sealing strength, and suppression of energy and raw material waste

Inactive Publication Date: 2015-04-08
TAIZHOU ZHUYE MACHINERY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 innermost layer 26 of thermoplastic material comprises metallocene-catalyzed linear low-density polyethylene (MLLDPE) and low-density polyethylene (LDPE), wherein metallocene-catalyzed linear low-density polyethylene (mLLDPE) has the following parameters: average density 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, low dens...

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Abstract

The invention provides a laminated packaging material which comprises an outermost thermoplastic material layer, a core layer, a middle thermoplastic material layer, a blocking layer and an innermost thermoplastic material layer from the outside in. The innermost thermoplastic material layer comprises metallocene catalyst polymerized linear low density polyethylene (MLLDPE) and low density polyethylene (LDPE), wherein MLLDPE has the following parameters that the average density is 0.88g / cm<3>-0.925g / cm<3>; a melt flow index (190 DEG C, 2.16kg) is 5g / 10min-20g / 10min; a peak fusing point is 85 DEG C-130 DEG C; and an expansion ratio is 1.2-1.8. LDPE has the following parameters that the average density is 0.90g / cm<3>-0.925g / cm<3>; the melt flow index (190 DEG C, 2.16kg) is 5g / 10min-20g / 10min; the peak fusing point is 85 DEG C-110 DEG C; and the expansion ratio is 1.2-1.8. Heat sealing can be conducted on a longitudinal sealing part quickly when the laminated packaging material is used for manufacturing a packaging container; the packaging container with high sealing strength is obtained; the manufactured packaging container is high in qualified rate; and a quality guarantee period of liquid food is long.

Description

technical field [0001] The invention relates to a laminated packaging material, in particular to a 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-layer structu...

Claims

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Application Information

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