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Three-dimensional forming method of laminated film

A three-dimensional forming and film technology, which is applied in sacks, packaging, flexible containers, etc., can solve the problems of forming injection and discharge ports, and achieve the effects of reducing load, reducing forming load, and reducing costs

Active Publication Date: 2020-12-11
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned three-dimensional forming method, the injection and discharge ports cannot be formed in the state where the two laminated films are superimposed in advance, and deviation due to processing elongation accompanying press forming occurs, and a margin is provided to take this deviation into consideration. Therefore, there is a problem that only a protrusion smaller than the size of the injection and discharge port can be formed.

Method used

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  • Three-dimensional forming method of laminated film
  • Three-dimensional forming method of laminated film
  • Three-dimensional forming method of laminated film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The surface roughness (Ra) of the molding die attached to the processing roll was set to 2.7 μm, the width of the protruding processed portion (in the processing roll width direction) was set to 30 mm, and the length of the protruding processed portion (in the processing roll rotation direction) was set to 3 mm, the surface roughness (Ra) of the anvil roll was set to 0.02 μm, and the set gap L between the forming die attached to the processing roll and the anvil roll was set to 50 μm. Next, the laminated film is supplied between the rolls with the outer surface film (stretched nylon film) on the processing roll side and the inner surface film (linear low-density polyethylene film) on the anvil roll side, and compression molding is performed by cold working. The forming height h of the protruding processed portion protruding toward the outer surface side was measured. The results are shown in Table 1.

Embodiment 2

[0076] Compression molding was performed in the same manner as in Example 1 except that the surface roughness (Ra) of the anvil roll was 0.5 μm, and the molding height h of the protruding processed portion protruding toward the outer surface side was measured. The results are shown in Table 1.

Embodiment 3

[0084] The surface roughness (Ra) of the molding die attached to the processing roll was set to 1.0 μm, the width of the protruding processed portion (in the width direction of the processing roll) was set to 50 mm, and the length of the protruding processed portion (in the direction of rotation of the processing roll) was set to 3 mm, the surface roughness (Ra) of the anvil roll was set to 0.5 μm, and the set gap L between the forming die mounted on the processing roll and the anvil roll was set to 10 μm, 30 μm, and 50 μm, respectively. Next, the laminated film is supplied between the rolls with the outer surface film (stretched nylon film) on the processing roll side and the inner surface film (linear low-density polyethylene film) on the anvil roll side, and compression molding is performed by cold working. The forming height h of the protruding processed portion protruding to the outer surface side was measured, and the presence or absence of wrinkles and rough surface trac...

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Abstract

The present invention provides a method for the three-dimensional molding of a layered film, in which a layered film, formed by laminating an inner-surface film that is soft on at least the innermost surface and an outer-surface film that is strong on the outer-surface side, is compression-molded using a molding die and an anvil and the compression-molded section is made to protrude to the outer-surface side, wherein the method is characterized in that the surface roughness (Ra) of the anvil is 0.5 µm or less. Due to this configuration, even if the molded height of the section processed to protrude is increased, a load on the layered film or molding equipment can be lightened and a section processed to protrude with outstanding visual properties can be molded efficiently.

Description

technical field [0001] The present invention relates to a three-dimensional forming method of a laminated film, and more specifically, to a laminate capable of forming a protruding processed portion having a sufficient height without causing wrinkles or the like and capable of forming a protruding processed portion excellent in appearance characteristics Three-dimensional forming method of film. Background technique [0002] A flexible packaging body (bag (Japanese: パウチ)) used for refilling, which is used to seal and package fluid contents such as liquids and powders and transfer them to another container for use, The injection and discharge ports and the like are formed by performing three-dimensional molding so that the laminated film constituting the package protrudes to both outsides. [0003] As such a three-dimensional forming method, a method of preheating a laminated film and then press-forming it while cooling in a mold (Patent Document 1), and a method of heating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C43/58B29C43/30B29C43/36B29L9/00B65D33/38
CPCB29C43/30B29C43/36B29C43/58
Inventor 安海隆裕弓削秀树
Owner TOYO SEIKAN KAISHA LTD