Packing container

A technology for packaging containers and thermoplastic materials, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of raw material waste, energy waste, etc., and achieve the effects of reduced necking, firm combination, and long shelf life

Inactive Publication Date: 2013-05-08
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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Examples

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Embodiment Construction

[0023] Such as figure 2 with image 3 As shown, a packaging container of the present invention includes the outermost layer 21 of thermoplastic material, the core layer 22, the middle layer 23 of thermoplastic material, the barrier layer 24, the adhesive layer 25 and the innermost layer 26 of thermoplastic material from outside to inside.

[0024] 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...

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Abstract

The invention provides a packing container which comprises a thermoplastic material outermost layer, a sandwich layer, a thermoplastic material middle layer, a blocking layer and a thermoplastic material innermost layer from exterior to interior, wherein the thermoplastic material middle layer comprises a linear low density polyethylene (MLLDPE) polymerized by a metalloscene catalyst and a low density polyethylene (LDPE); the linear low density polyethylene (MLLDPE) polymerized by a metalloscene catalyst has the following parameters as follows: the average density is 0.88g / cm<3>-0.925g / cm<3>, the melt flow index (190 DEG C,2.16 kg) is 5g / 10 min-20g / 10 min, the peak value melting point is 85 DEG C-130 DEG C, and the expansion ratio is 1.2-1.8; and the low density polyethylene (LDPE) has the following parameters as follows: the average density is 0.90g / cm<3>-0.925g / cm<3>, the melt flow index ( 190 DEG C,2.16 kg) is 5g / 10 min-20g / 10 min, the peak value melting point is 85 DEG C-110 DEG C, and the expansion ratio is 1.2-1.8. A longitudinal sealing part in a preparing process of the packing container provided by the invention can rapidly carry out hot seal, the sealing intensity is good, the qualification rate of the prepared packing container is high, and the quality protecting time of a liquid state food is long.

Description

technical field [0001] The invention relates to a packaging container, in particular to a packaging container used 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 structure ...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/10B65D65/40
Inventor 吴壮
Owner TAIZHOU ZHUYE MACHINERY SCI & TECH
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