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Method of producing sheet joined body and apparatus for producing sheet joined body

A manufacturing method and technology for manufacturing devices, which are applied in the directions of lamination devices, chemical instruments and methods, synthetic resin layered products, etc., can solve problems such as decreased manufacturing efficiency

Inactive Publication Date: 2012-05-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to join the terminal portion and the tip portion, the drawing of the material film is temporarily stopped, and during this stop period, when the feeding of the material film is stopped, the stretching is stopped during the stopping of the feeding of the material film. There is also a problem that manufacturing efficiency decreases in the manufacturing method

Method used

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  • Method of producing sheet joined body and apparatus for producing sheet joined body
  • Method of producing sheet joined body and apparatus for producing sheet joined body
  • Method of producing sheet joined body and apparatus for producing sheet joined body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] The following resin sheet members and conditions were used.

[0141] ・Material film: Triacetyl cellulose resin (TAC) film (manufactured by Fujifilm Corporation, thickness 80 μm, width 1330 mm)

[0142] Lamination width: width 1.5mm

[0143] ・Heating fusion bonding method: laser

[0144] Laser: semiconductor laser (wavelength 940nm, power 80W, spot diameter φ2mm, power density 2547W / cm 2 , scanning speed 70mm / sec, cumulative exposure 102J / cm 2 , top hat beam)

[0145] Light absorber: trade name "Clearweld LD 120C" (manufactured by Gentex Corporation in the United States, with an absorption rate of 30% for light with a wavelength of 940 nm, and acetone as a solvent), with a width of 5.0 mm, 10 nL / mm 2 Coated on the upper surface of the new material film arranged on the underside

[0146] ・Pressure member: flat plate of fused silica glass (thickness 15mm)

[0147] ・Pressure conditions: with a load of 50kgf / cm 2 Press material film laminated part

[0148] The above-...

Embodiment 2

[0151] As the old and new resin sheet members, polyvinyl alcohol resin (PVA) film (manufactured by Kuraray Co., Ltd., thickness 75 μm, width 3000 mm) was used, and Figure 13 In the stretching device as shown, the stretching ratio is 2.6 times in the swelling tank, 3.4 times in the dyeing tank, 3.6 times in the crosslinking tank, and 6.0 times in the stretching tank. After the stretching, the old PVA film and the new PVA film were joined together in the same manner as in Example 1, and the new PVA film was stretched following the old PVA film, except that the resin sheet member was passed through the cleaning tank.

[0152] As a result, the old and new PVA films were well conveyed to the stretching device while the new and old PVA films were being joined, and the old and new PVA films were also favorably conveyed to the stretching device after the joining of the new and old PVA films. In addition, in the stretching device, after being stretched through each chemical solution t...

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PUM

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Abstract

Producing method and apparatus for a sheet assembly are provided to prevent the breaking of a joint from a rear processing region, and to combine a resin sheet member without stopping a returning process of a sheet member. A producing method for a sheet assembly comprises the following: supporting the tip end of a second resin sheet member(1b); spreading a light absorbing agent to the tip end of the second resin sheet member; laminating a first resin sheet member(1a) flowing from the upper side, and discharging the laminated first resin sheet member to the lower direction; returning the first resin sheet member to a processing region through a sheet lamination unit having the same carrying-in speed and carrying-out speed of the first resin sheet member; returning the first resin sheet member on the lower side of the sheet lamination unit, and stopping the returning process of the first resin sheet member on the upper side of the sheet lamination unit; cutting the first resin sheet member, and folding the tip end and the cut end of the first resin sheet member using a light absorbing agent; and fusing the ends using a laser.

Description

technical field [0001] The present invention relates to a method for manufacturing a sheet bonded body and an apparatus for manufacturing a sheet bonded body by bonding two or more resin sheet members by irradiating laser light to form a sheet bonded body. Background technique [0002] Conventionally, optical films including polarizing films and the like have been used in image display devices such as liquid crystal display devices. [0003] As a method of manufacturing such a polarizing film, a method is adopted in which a material film (resin sheet member) is sent out from a material roll, and the material film is passed through A device that guides multiple rollers and various chemical solution tanks to stretch the material film. The material roll is a strip-shaped resin sheet member such as polyvinyl alcohol resin (PVA) film that is used as a raw material. For example, the method of moving the material film along its longitudinal direction to continuously immerse the ma...

Claims

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Application Information

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IPC IPC(8): B29C65/16
CPCB29C66/43B29C65/1616B29C65/1635B29C66/71B29C66/855B29C65/1687B29C2793/0081B29C65/1683B29C66/83221B29C66/1122B29C65/1619B29C65/1667B29C65/1654B29C65/7847B29C66/81267B29C65/7891B29C66/73921B29L2011/00B29K2029/04B29K2079/085B29K2077/00B29K2075/00B29K2071/00B29K2069/00B29K2067/006B29K2067/003B29K2059/00B29K2027/06B29K2025/06B29K2023/38B29K2023/18B29K2023/12B29K2023/083B29K2023/06B29K2001/08B32B27/08B32B37/02G02B5/30G02F1/1335
Inventor 松尾直之山口康雄
Owner NITTO DENKO CORP
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