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Paper backing plastic aluminum compound packing material

A composite packaging material, plastic-aluminum technology, applied in the direction of packaging, wrapping paper, wrapping paper, etc., can solve the problems of large amount of base paper layer, large proportion of base paper, increased cost, etc., to reduce the amount of base paper, reduce product cost, increase The effect of intensity

Inactive Publication Date: 2008-06-11
MIANYANG XINKANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of the cost structure of this material, the base paper of the base paper layer accounts for a large proportion, and the large amount of base paper layer not only increases the unit weight of the material, but also increases the cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: The weight per unit area of ​​each layer of the paper-based plastic-aluminum composite packaging material is:

[0024] Polyethylene outer layer: 20g / m 2 ,

[0025] Base paper: 25g / m 2 ,

[0026] Polyethylene adhesive layer: 19g / m 2 ,

[0027] Base paper modified layer: 6g / m 2 ,

[0028] Aluminum foil: 20g / m 2 ,

[0029] Adhesive polyethylene layer: 17g / m 2 ,

[0030] Polyethylene inner layer: 18g / m 2 ;

[0031] The base paper modified layer is ethylene vinyl acetate copolymer.

[0032] The present embodiment is tested, and its hygienic performance index is as follows:

[0033] project

unit

Test results

Evaporation residue

4% acetic acid (60°C, Zhr)

65% ethanol (20°C, Zhr)

Alkane (10℃, Zhr)

mg / L

29.5

4.0

18.0

Potassium permanganate consumption (60℃, Zhr)

mg / L

＜0.3

Heavy metals (in pb)

4% acetic acid (60°C, Zhr)

mg / L

...

Embodiment 2

[0036] Embodiment 2: The weight per unit area of ​​each layer of the paper-based plastic-aluminum composite packaging material is:

[0037] Polyethylene outer layer: 19g / m 2 ,

[0038] Base paper: 40g / m 2 ,

[0039] Polyethylene adhesive layer: 18g / m 2 ,

[0040] Base paper modified layer: 1.5g / m 2 ,

[0041] Aluminum foil: 20g / m 2 ,

[0042] Adhesive polyethylene layer: 15g / m 2 ,

[0043] Polyethylene inner layer: 17g / m 2 ;

[0044] Among them: the modifier of the base paper modified layer is a mixture of rosin modified material and polyvinyl alcohol.

[0045] Its production process is to print on the base paper and heat-melt bond it with the polyethylene adhesive layer, then coat the base paper modifier, heat-melt bond the polyethylene outer layer after drying, then heat-melt bond the aluminum foil, and then heat-melt bond it. The polyethylene layer is bonded, and finally the polyethylene inner layer is hot-melt bonded.

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Abstract

The invention relates to a paper-base packing material, in particular to flexible packing material which is used for the long-acting sterility and fresh keeping of drinking food. The paper-base plastic-aluminum composite packing material of the invention comprises a polyethylene outer layer, a base paper layer disposed behind the outer layer, a polyethylene binding layer arranged behind the base paper layer, an aluminum leaf mounted behind the binding layer, and an adhesive polyethylene layer and a polyethylene inner layer positioned behind the aluminum leaf, wherein the base paper layer is coated with base paper modified layer, and the weight per unit area of each layer includes the polyethylene outer layer 19-20 g / m2, the base paper layer 20-40 g / m2, the polyethylene binding layer 18-20 g / m2, the base paper modified layer 1-8 g / m2, the aluminum leaf 20-22 g / m2, the adhesive polyethylene layer 15-17 g / m2, and the polyethylene inner layer 17-18 g / m2. Both the utilization per unit area of the base paper of the invention and the total weight per unit area of the products are greatly reduced, thereby reducing the cost of products under the pre-condition of guaranteeing each property of the products.

Description

(1) Technical field [0001] The invention is a paper-based packaging material, especially a soft packaging material for long-term aseptic fresh-keeping of drinking food. (2) Background technology [0002] In terms of the packaging of drinking food, the packaging materials must meet the conditions of water vapor, UV protection, oxygen resistance, and bacteria isolation, so as to ensure the long-term room temperature aseptic freshness of the food after it is loaded. At present, the flexible packaging of milk, juice and various beverages is made of paper-based plastic-aluminum composite packaging materials, and most of them are provided by Tetra Pak in Sweden. The composition of the above-mentioned paper-based plastic-aluminum composite packaging is as follows: [0003] Polyethylene outer layer: 20~22g / m 2 [0004] Base paper layer: 60~75g / m 2 [0005] Polyethylene adhesive layer: 18~20g / m 2 [0006] Aluminum foil: 20~22g / m 2 [0007] Adhesive polyethylene layer: 15~17g / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B32B27/10B32B15/04B32B7/12D21H27/32D21H27/10D21H21/18
Inventor 李华鼎吴建平
Owner MIANYANG XINKANG IND
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