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Laminate sheet, laminate sheet roll, and producing method therefor

a technology of laminate sheets and rolls, applied in the field of laminate sheets, can solve the problems of data reading errors, roll collapse, etc., and achieve the effect of preventing the formation of defects

Inactive Publication Date: 2007-02-15
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] The present invention has been designed in consideration of such circumstances, and it is an object thereof to provide a laminate sheet which is capable of preventing the formation of defects on an adhesive sheet when the laminate sheet is wound into a roll and a producing method therefor, and a laminate sheet roll which is capable of preventing the formation of defects on an adhesive sheet and a producing method therefor.

Problems solved by technology

In order to prevent such arc-form traces from forming on the cover sheet portions 301P, the laminate sheet 1P may be wound at a reduced winding pressure, but the problem with a roll which has been wound at a reduced winding pressure is that the roll is likely to collapse.
Such arc-form traces and depressions formed in the cover sheet portions 301P as described above do not cause great problems in conventional optical discs, but in next-generation high capacity / high recording density optical discs (Blu-ray Discs), these arc-form traces and depressions become defects which may cause errors when data are read.

Method used

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  • Laminate sheet, laminate sheet roll, and producing method therefor
  • Laminate sheet, laminate sheet roll, and producing method therefor
  • Laminate sheet, laminate sheet roll, and producing method therefor

Examples

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Effect test

first embodiment

[0054] FIGS. 1(a) through 1(e) are sectional views showing a producing method for a laminate sheet according to a first embodiment of the present invention, FIG. 2 is a perspective view of the laminate sheet according to the first embodiment of the present invention, FIG. 3 is a plan view of the laminate sheet according to the first embodiment, and FIG. 4 is a perspective view of a laminate sheet roll according to the first embodiment.

[0055] In order to produce a laminate sheet 1A according to this embodiment, first, as shown in FIG. 1 (a), an adhesive layer 31A, a base material 32A, and a protective sheet 4A are successively laminated onto a release surface of a long release sheet 2A. Note that the adhesive layer 31A and base material 32A together constitute an adhesive sheet 3A.

[0056] A well-known sheet may be used as the release sheet 2A, for example a resin film such as a polyethylene terephthalate film or polypropylene film, or paper such as glassine paper, clay-coated paper,...

second embodiment

[0077] FIGS. 5(a) through 5(e) are sectional views showing a producing method for a laminate sheet according to a second embodiment of the present invention, FIG. 6 is a perspective view of the laminate sheet according to the second embodiment of the present invention, FIG. 7 is a plan view of the laminate sheet according to the second embodiment, and FIG. 8 is a perspective view of a laminate sheet roll according to the second embodiment.

[0078] In order to produce a laminate sheet 1B according to this embodiment, first, as shown in FIG. 5(a), an adhesive layer 31B, a base material 32B, and a protective sheet 4B are successively laminated onto a release surface of a long release sheet 2B. Note that the adhesive layer 31B and base material 32B together constitute an adhesive sheet 3B.

[0079] Similar materials to those used for the release sheet 2A, adhesive layer 31A, base material 32A, and protective sheet 4A of the laminate sheet 1A according to the first embodiment described abov...

third embodiment

[0088] FIGS. 9(a) through (d) are sectional views showing a producing method for a laminate sheet according to a third embodiment of the present invention.

[0089] In order to produce a laminate sheet 1C according to this embodiment, first, as shown in FIG. 9(a), an adhesive layer 31C and a base material 32C are successively laminated onto a release surface of a long release sheet 2C. Note that the adhesive layer 31C and base material 32C together constitute an adhesive sheet 3C.

[0090] Similar materials to those used for the release sheet 2A, adhesive layer 31A, and base material 32A of the laminate sheet 1A according to the first embodiment described above may be used as the materials for the release sheet 2C, adhesive layer 31C, and base material 32C.

[0091] Once the release sheet 2C and adhesive sheet 3C have been laminated as shown in FIG. 9(a), cuts which do not reach the release sheet 2C are made in the adhesive sheet 3C as shown in FIG. 9(b), whereby the adhesive sheet 3C is ...

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Abstract

An adhesive sheet 301A having a predetermined form is laminated onto a long release sheet 2A, and a protective member 5A which is thicker than the adhesive sheet 301A is provided in a position so as not to overlap the adhesive sheet 301A when a laminate sheet 1A is wound into a roll. According to this laminate sheet 1A, defects can be prevented from forming on the adhesive sheet 301A when the laminate sheet 1A is wound into a roll.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a laminate sheet constituted by an adhesive sheet having a predetermined form which is laminated onto a release sheet, and more particularly to a laminate sheet which is capable of reducing defects that may be formed on the adhesive sheet when the laminate sheet is wound into a roll. [0003] 2. Description of the Related Art [0004] A conventional laminate sheet in which adhesive labels are laminated onto a release sheet is shown in FIG. 20 (Publication of Examined Utility Model Application No. H6-18383 (FIG. 1), Publication of patent application Ser. No. H8-316175 (FIGS. 3 through 6)). In recent years, such laminate sheets have come to be used in the manufacture of optical discs in order to laminate a cover sheet onto the light-receiving surface of the optical disc. As shown in FIG. 20, a conventional laminate sheet 1P is constituted by a long release sheet 2P and cover sheet portions...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B33/00B32B27/08B32B7/12C09J7/20
CPCB32B7/12Y10S428/906C09J7/0232G11B7/26Y10T156/1052Y10T428/1471Y10T156/1057Y10T156/1084Y10T428/24793Y10T428/149Y10T428/14Y10T428/2495Y10T428/1495Y10T428/24777Y10T428/1476Y10T156/1085Y10T156/1075Y10T156/1082C09J7/02C09J7/20C09J7/403B32B27/08
Inventor KATOH, KAZUYAAKIWA, JUNNAKAYAMA, TAKEHITO
Owner LINTEC CORP