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Method of mfg. packaging laminate

A technology of laminated materials, manufacturing methods, applied in the direction of lamination, packaging, household packaging, etc.

Inactive Publication Date: 2005-02-09
NIPPON TETRAPACK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, suitable packaging materials, especially those made of paper (fiber), to be stored / sales displayed for several weeks or months under holding / heating conditions in vending machines or hot rooms have not yet been proposed.
Methods of making good packaging laminates without delamination (delamination) between layers have not been disclosed in the conventional art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A tape-shaped film laminate (30 μm thick poly vinyl layer, 10 micron thick layer of ethylene acrylic acid copolymer). A 9 micron thick aluminum foil was immediately laminated to the ethylene acrylic acid copolymer surface of the film laminate with polyurethane adhesive (trade name LX-747 A / KX-75, Dainippon Ink & Chemicals). Then, the laminate is wound into a roll. The roll laminate was aged at 40°C for 4 days to cure the adhesive resin. The heated food preservative, ie, ascorbic acid, is added through the aforementioned polyurethane binder.

[0072] Then, the laminated material is unrolled from the kept roll, and the surface of the aluminum foil is treated with corona discharge (corona discharge treatment machine, manufactured by PILLAR, output power 15W / m 2 ).

[0073] In the laminator provided in the next step of the corona discharge treatment step, the unprinted surface of the printing stock paper unrolled from the roll is laminated on the belt by extrusion lamin...

Embodiment 2

[0078] Use a polyester adhesive instead of a polyurethane adhesive, and use a heated food preservation agent containing an adhesive, wherein the adhesive contains a heated food preservation agent L-sodium ascorbate in an amount of adhesive (trade name: TAKERAK A-515 / A-50, Takeda Chemical) 100 parts by weight of solids use 10 parts by weight of preservative. In addition to applying these adhesives (dosage: about 3.0 g / m 2 (In the case of drying)) Except for obtaining the laminate and its thin layer, the preparation and evaluation of the packaging laminate of the present invention were the same as in Example 1, and the same results as above were obtained.

Embodiment 3

[0080] In addition to using vitamin E as a substitute for ascorbic acid and ionomer as a substitute for ethylene acrylic acid copolymer binder resin (Mitsui DUPONT POLYCHEMICAL, trade name HIMIRANE AM7207), the packaging laminates of the present invention were prepared and evaluated in the same manner as Example 1 was the same, and the same results as above were obtained.

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PUM

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Abstract

A method of manufacturing a packaging laminate including aluminium foil; specifically, a method of manufacturing a laminate free from delamination and most suitable for packaging, comprising the steps of coating the innermost film surface of polyolefin with an adhesive resin, pasting aluminium foil using a dry-lamination adhesive, taking up an elongated laminate on a reel for aging, pulling out the resulting laminate from the reel, subjecting the aluminium foil surface to corona discharging, subjecting molten polyolefin to extrusino lamination, and laminating a fibrous carrier layer, whereby the inter-layer adhesion strength of the laminate is improved.

Description

technical field [0001] The present invention relates to a method of manufacturing laminated materials for packaging. In particular, the present invention relates to a method for the manufacture of laminates for the manufacture of containers (or cartons) for filling and packaging hot liquid food sold in vending machines, etc. Laminated packaging material for preservatives for heated foods. Background technique [0002] Flexible packaging laminates have been used for liquid food packaging for many years. Packaging containers for milk, fruit juice, rice wine, distilled spirits, mineral water and other beverages are manufactured, for example, by applying creased tape to a fibrous substrate (e.g. paper, etc.) / plastic laminate Shaped packaging material is sealed longitudinally along the extension direction to form a tube, the contents are packed into the tube-shaped packaging material, and transversely sealed along the transverse direction of the tube-shaped packaging material t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08B32B15/20B32B27/12B32B27/32B32B37/02B32B37/12B32B37/15B32B38/00
CPCB32B37/12B32B2311/24B32B27/12B32B37/153B32B2553/00B32B15/08B32B2439/40B32B2323/00B32B2310/14B32B2309/04B32B37/02B32B2309/027B32B27/32B32B38/0008B32B15/20B32B7/12B32B15/085B32B2439/70
Inventor 池之谷正克
Owner NIPPON TETRAPACK KK