Patent ID: 8252136
Filing Date: 2012-08-28
Classification: B29C,B29K,B29L,G02B,G02F,Y10T

Abstract:
1. A process for production of an optical display unit, comprising: a step of providing a connected sheet product produced by a process for production of the connected sheet product, the process comprising: first feeding a first long sheet product from a material roll; next feeding a second long sheet product from a material roll; and sequentially connecting a rear end of the first sheet product to a front end of the second sheet product, wherein the first sheet product has a first surface protecting film, a first optical member, a first pressure-sensitive adhesive layer, and a first release film provided in this order, the second sheet product has a second surface protecting film, a second optical member, a second pressure-sensitive adhesive layer, and a second release film provided in this order, a transverse end face of the first sheet product is opposed to a transverse end face of the second sheet product, the first release film and the second release film are connected with a first connecting member, the first surface protecting film and the second surface protecting film are connected with a second connecting member, the relation C≧A>B is satisfied, wherein A represents an adhering force between the first connecting member and the second release film, B represents an adhering force between the second release film and the second pressure-sensitive adhesive layer, and C represents an adhering force between the second connecting member and the second surface protecting film, and the adhering forces A and C are each ten times or more greater than the adhering force B; a step of cutting the connected sheet product with exception of the first and second release films into a piece with a predetermined size by cutting means; and a bonding step comprising bonding the piece with the predetermined size to a substrate with the pressure-sensitive adhesive interposed therebetween while removing the release films continuously.