Packaging container

A technology for packaging containers and thermoplastic materials, applied in packaging, wrapping paper, transportation and packaging, etc., can solve problems such as energy waste and raw material waste, achieve reduced necking phenomenon, high qualification rate, and suppression of energy and raw material waste. Effect

Inactive Publication Date: 2015-04-22
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

[0023] Such as figure 2 and 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 outermost layer 21 of thermoplastic material comprises metallocene-catalyzed linear low-density polyethylene (MLLDPE) and low-density polyethylene (LDPE), wherein the 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...

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Abstract

The invention provides a packaging container which comprises an outmost thermoplastic material layer, a core layer, an intermediate thermoplastic material layer, a blocking layer and an innermost thermoplastic material layer from outside to inside. The outmost thermoplastic material layer contains metalloscene catalyst polymerized linear low density polyethylene (MLLDPE) and low density polyethylene (LDPE), the MLLDPE has following parameters: average density of 0.88g / cm3-0.925g / cm3, melt flow index (190 DEG C, 2.16kg) of 5g / 10min-20g / 10min, peak melting point of 85 DEG C-130 DEG C, and expansion ratio of 1.2-1.8, and the LDPE has following parameters: average density of 0.90g / cm3-0.925g / cm3, melt flow index (190 DEG C, 2.16kg) of 5g / 10min-20g / 10min, peak melting point of 85 DEG C-110 DEG C, and expansion ratio of 1.2-1.8. A longitudinal sealing portion can realize quick thermal sealing during the process of manufacturing the packaging container, sealing intensity is high, and the manufactured packaging container is high in pass percentage and long in shelf life of liquid food.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B65D65/40B65D85/72B32B27/32C08L23/08C08L23/06
Inventor 吴壮
Owner TAIZHOU ZHUYE MACHINERY SCI & TECH
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