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Packaging container

A technology for packaging containers and thermoplastic materials, which is applied in the production of bulk chemicals and layered products, etc., can solve the problems of waste of raw materials and energy, and achieve the effects of reduced necking, firm combination, and long shelf life

Inactive Publication Date: 2015-04-08
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] like 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 adhesive layer 25 comprises metallocene catalyst polymerized linear low density polyethylene (MLLDPE) and low density polyethylene (LDPE), wherein the metallocene catalyst polymerized 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,...

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Abstract

The invention provides a packaging container which is characterized by comprising a thermoplastic material outermost layer, a sandwich layer, a thermoplastic material intermediate layer, a blocking layer, an adhesion agent layer and a thermoplastic material innermost layer from the outside in, wherein the adhesion agent layer comprises metallocene linear low density polyethylene (MLLDPE) and low density polyethylene (LDPE); the MLLDPE comprises the following parameters: average density of 0.88 g / cm<3> to 0.925 g / cm<3>, melt flow index (190 DEG C, 2.16kg) of 5 g / 10 min to 20 g / 10 min, peak melting point of 85 DEG C to 130 DEG C and expansion ratio of 1.2 to 1.8; and the LDPE comprises the following parameters: average density of 0.90 g / cm<3> to 0.925 g / cm<3>, melt flow index (190 DEG C, 2.16kg) of 5 g / 10 min to 20 g / 10 min, peak melting point of 85 DEG C to 110 DEG C and expansion ratio of 1.2 to 1.8. The longitudinal sealing part can be heat-sealed during the process of preparing the packaging container, the sealing strength is good, the prepared packaging container has high percent of pass, and the shelf life of liquid 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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Patent Type & Authority Patents(China)
IPC IPC(8): B32B1/02B32B7/12C08L23/08C08L23/06B32B1/00
CPCY02P20/52
Inventor 吴壮
Owner TAIZHOU ZHUYE MACHINERY SCI & TECH
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