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Method for manufacturing laminated packaging material

A packaging material and extrusion lamination technology, applied in the field of laminated packaging materials for packaging liquid food, can solve the problems of energy waste, raw material waste, etc., and achieve reduced necking, high pass rate, energy and The effect of suppressing waste of raw materials

Inactive Publication Date: 2015-07-15
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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  • Method for manufacturing laminated packaging material
  • Method for manufacturing laminated packaging material
  • Method for manufacturing laminated packaging material

Examples

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Embodiment Construction

[0029] Such as figure 2 As shown, a laminated packaging material manufactured by the method 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 of thermoplastic material from outside to inside. Layer 26.

[0030] 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℃~...

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Abstract

The invention provides a method for manufacturing laminated packaging material. The method for manufacturing the laminated packaging material comprises the following steps: step 1, pressing crease lines and stamping open holes in a core layer; step 2, extruding laminated thermoplastic material on the outer side surface of the core layer to form an outermost layer; step 3, extruding laminated thermoplastic material on the inner side surface of the core layer to form an intermediate layer and combining a blocking layer with the inner side surface of the core layer through the intermediate layer at the same time; step 4, extruding laminated thermoplastic material on the blocking layer to form an adhesive layer; and step 5, extruding laminated thermoplastic material on the adhesive layer to form the innermost layer. In the step 3, the thermoplastic material of the intermediate layer is formed by the blending metallocene catalyst polymerized linear low density polyethylene (MLLDPE) and low density polyethylene (LDPE). According to the invention, during the process of manufacturing a packaging container by the laminated packaging material manufactured by using the method, heat seal can be quickly performed on the longitudinal sealing part, so as to obtain the packaging container with good sealing strength, the manufactured packaging container has a high qualification rate, and the liquid food can be preserved for a long time.

Description

technical field [0001] The present invention relates to a method for manufacturing a laminated packaging material, in particular to a method for manufacturing a laminated 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B37/02B32B37/12B29C47/06
CPCB29C48/18B32B37/0023B32B37/02B32B37/10B32B37/12B32B37/1284B32B37/153B32B2307/72B32B2311/24B32B2317/12B32B2323/046B32B2439/70B65D65/40B65D2565/38
Inventor 吴壮
Owner TAIZHOU ZHUYE MACHINERY SCI & TECH
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