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Laminated package material

A technology for packaging materials and thermoplastic materials, applied in the field of laminated packaging materials, can solve the problems of raw material waste, energy waste, etc., and achieve the effects of reduced necking phenomenon, good sealing strength, and rapid heat sealing

Inactive Publication Date: 2015-07-01
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 includes an outermost layer 21 of a thermoplastic material, a core layer 22, an intermediate layer 23 of a thermoplastic material, a barrier layer 24, an adhesive layer 25 and an innermost layer 26 of a thermoplastic material in order from the outside to the inside.

[0023] The innermost layer 26 of the thermoplastic material contains linear low-density polyethylene (MLLDPE) and low-density polyethylene (LDPE) polymerized with a metallocene catalyst, wherein the linear low-density polyethylene (mLLDPE) polymerized with a metallocene catalyst has the following parameters: average density 0.88g / cm 3 ~0.925 g / cm 3 , Melt flow index (190℃, 2.16kg) is 5 g / 10min~20 g / 10min, peak melting point is 85℃~130℃, expansion ratio is 1.2~1.8; low density polyethylene (LDPE) has the following parameters: The average density is 0.90g / cm 3 ~0.925 g / cm 3 , Melt flow index (190℃, 2.16kg) is 5 g / 10min~20 g / ...

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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

[0001] This invention patent application is based on the divisional application of the invention patent application named as a laminated packaging material filed by the applicant for the first time. The original application date is December 31, 2012, and the application number is 201210594098.9. Technical field [0002] The invention relates to a laminated packaging material, in particular to a packaging material for packaging liquid food. Background technique [0003] At present, disposable packaging containers for liquid food include bricks, squares, triangles, octahedral shapes with hexagonal cross-sections, pillow shapes, etc. The laminated packaging materials used to make these packaging containers usually include successive layers. The outermost layer, the core layer, the intermediate layer of the thermoplastic material, the barrier layer, the adhesive layer and the innermost layer of the thermoplastic material. There are also low-density polyethylene (LDPE) / printing ink laye...

Claims

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Application Information

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