US2009191410A1PendingUtilityA1

Resin joined body

60
Assignee: NITTO DENKO CORPPriority: Oct 5, 2006Filed: Mar 24, 2009Published: Jul 30, 2009
Est. expiryOct 5, 2026(~0.2 yrs left)· nominal 20-yr term from priority
Inventors:Naoyuki MatsuoAtsushi HinoMasayuki Kaneto
B29C 66/65B29C 65/1638B32B 27/34B29K 2909/08B32B 27/12B29C 66/7292B29K 2277/10Y10T428/31728B29C 66/81267B29C 66/43B29C 66/919B32B 27/08B29C 65/8207B29C 66/8122B29C 66/9161B32B 27/02B29C 65/8253B32B 7/12B29C 66/723Y10T428/31504B29C 66/73921B29C 65/1616B29L 2009/00B29C 65/1635B29K 2105/0854B29C 66/71B29C 66/342B29C 66/1122B32B 27/36B29C 65/1654B29C 66/8322B29K 2995/0027B29C 66/934B29C 66/939Y10T442/659B29C 2035/0822B29K 2711/12B29C 66/72328
60
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Claims

Abstract

In a resin joined body including at least one member made of a resin material that forms a first resin layer and a second resin layer, the at least one of the first and second resin layers having the rear side from which the laser beam has been irradiated has an absorption constant of 50 to 5000 m−1 for the wavelength of the laser beam, and the fuse bonded portion is formed to have a relationship of X>Y, wherein a light transmittance of light passing from the first resin layer to the second resin layer via the fused portion is designated as X(%), and a light transmittance of light passing continuously from the first resin layer to the second resin layer via a portion other than the fused portion is designated as Y(%).

Claims

exact text as granted — not AI-modified
1 . A resin joined body comprising:
 at least one member made of a resin material that forms a first resin layer and a second resin layer,   said first resin layer and said second resin layer being held in surface-to-surface contact with each other to form a joined portion,   said joined portion having a fuse bonded portion formed by fuse bonding of the resin material without using absorbent,   wherein the resin joined body being obtained by holding the first resin layer and the second resin layer in surface-to-surface contact with each other, irradiating a laser beam from a rear side of at least one of the first and second resin layers to said surface-to-surface contact portion, and irradiating the laser beam so as to be focused during the travelling from said rear side to a front side of said at least one of the first and second resin layers so that the resin material on the front side is heat fused to form said fuse bonded portion,   wherein said at least one of the first and second resin layers having the rear side from which the laser beam has been irradiated has an absorption contact of 50 to 5000 m−1 for the wavelength of the laser beam, and   the fuse bonded portion is formed to have a relationship of X<Y, wherein a light transmittance of light passing from the first resin layer to the second resin layer via the fused portion is designated as X(%), and a light transmittance of light passing continuously from the first resin layer to the second resin layer via a portion other than the fused portion is designated as Y(%).   
     
     
         2 . The resin joined body according to  claim 1 , wherein the fuse bonded portion is formed to have a value of the X and a value of the Y satisfying a relationship of X>1.2Y. 
     
     
         3 . The resin joined body according to  claim 1 , wherein the fuse bonded portion is formed with an interface between the first resin layer and the second resin layer being eliminated. 
     
     
         4 . The resin joined body according to  claim 1 , wherein the members to be fused together are of the same material.

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