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Joining method of resin components

A technology of resin components and bonding methods, applied in polarizing elements, optical elements, applications, etc., can solve the problems of original roll fracture, crystallinity hardening, polarizing film increasing tensile load, etc., and achieve the effect of suppressing fracture

Inactive Publication Date: 2016-04-13
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] It is difficult for a heat sealer to heat only a narrow area, so due to wide-area heating and heat transfer to the surrounding area, the crystallinity of the joint and its surrounding area increases and the local hardening
Therefore, if the tensile load is increased to improve the properties of the polarizing film, the original roll may break

Method used

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  • Joining method of resin components
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  • Joining method of resin components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0203] Under the above-mentioned basic conditions, an attempt was made to join the old and new rolls of film. As a result, the new and old rolls of film did not shift in position, and a good splicing was successfully achieved.

[0204] Furthermore, while the resulting conjugated body was figure 1 In the stretching device shown, the stretching ratio is 2.6 times in the swelling bath, 3.4 times in the dyeing bath, 3.6 times in the crosslinking bath, and 6.0 times in the stretching bath and washing bath Stretching was performed to manufacture polarizing films in batches, and as a result, no breakage occurred at the junction, and production was possible.

Embodiment 2

[0206] In addition to changing the interphase member to silicone rubber (thickness 5mm, hardness 50 degrees), under the above basic conditions, an attempt was made to join the old and new raw films. As in Example 1, the new and old raw films did not shift in position and were successfully achieved. Good engagement.

[0207] Furthermore, polarizing films were batch-fabricated from the obtained bonded body under the same conditions as in Example 1, and it was possible to manufacture without breaking at the bonded portion.

Embodiment 3

[0209] In addition to changing the interphase member to a laminated member of urethane rubber and cellulose triacetate film (manufactured by Fujifilm Co., Ltd., thickness 80 μm, placed on the non-joining member side), an attempt was made to join new and old raw film under the above basic conditions, and the results were the same as In the same manner as in Example 1, there was no misalignment of the old and new raw films, and good bonding was successfully achieved.

[0210] Furthermore, polarizing films were batch-fabricated under the same conditions as in Example 1 except that the obtained bonded body was stretched 5.5 times in a stretching bath and a washing bath, and it was possible to manufacture without breaking at the bonded part.

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Abstract

The present invention provides a joining method of resin members which can suppress cracking and can stably obtain a desired joining shape in joining of resin members using a laser. This method is characterized by including the step of arranging a plurality of resin members so as to at least partially overlap, and pressurizing the overlapped portion of the resin members with a rotatable cylindrical or spherical glass pressing member (50). The process of irradiating the overlapping portion with laser light L while sweeping the pressing member (50) and passing through the pressing member (50); (40), the interphase component (40) has a pressure surface larger than the pressure surface of the pressure component (50).

Description

technical field [0001] The present invention relates to a bonding method of resin members, and more specifically, to a method for bonding polarizing films, etc., used in image display devices such as liquid crystal display devices, electroluminescence (EL) display devices, plasma displays, and field emission displays, etc., using laser light. Method of film bonding. Background technique [0002] Conventionally, in image display devices such as liquid crystal display devices, optical films including polarizing films and the like have been used. [0003] As a method of manufacturing such a polarizing film, a method is adopted in which a strip-shaped polyvinyl alcohol (PVA)-based raw film is fed out from the leading end side while passing through a predetermined moving path, and stretched on the moving path, Thus forming a polarizing film. [0004] For example, a method is adopted in which the raw film is dyed by restricting the moving path with a plurality of rollers while s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/16
CPCB29C65/1616B29C65/1619B29C65/1635B29C65/1658B29C66/1122B29C66/43B29C66/71B29C66/723B29C66/73921B29C66/8122B29C66/81267B29C66/83441B29C66/8362B29C66/939B29C66/949B29L2011/00B29K2029/04B29K2079/085B29K2077/00B29K2075/00B29K2071/00B29K2069/00B29K2067/006B29K2067/003B29K2059/00B29K2033/12B29K2027/06B29K2025/06B29K2023/38B29K2023/18B29K2023/12B29K2023/083B29K2023/06B29K2909/08B29C65/16G02B5/30
Inventor 松尾直之高见伸行
Owner NITTO DENKO CORP
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