Patent ID: 9267058
Filing Date: 2016-02-23
CPC Classification: B32B,C09J,G02F

Claim Text:
1. A method for manufacturing a laminate including at least two adherends and a layer of adhesive composition, the at least two adherends are laminated with the adhesive composition which develops adhesive strength by irradiating electromagnetic wave or particle beam, the adhesive composition comprising an adhesive base agent consisting of at least one type of monomer and at least one type of polymerization initiator, wherein (1) the at least one type of monomer is a monofunctional (meth)acryloyl group-containing monomer having at least one of hydroxyl group, carboxyl group, cyano group, amino group, alicyclic hydrocarbon group, heterocyclic group, isocyanate group, lactone ring group or amido group and glass transition temperature after polymerization of the adhesive base agent is 50° C. or higher, (2) the at least one type of monomer is acrylonitrile, or (3) the at least one type of monomer is 2-hydroxyethylacrylate, wherein the adhesive strength of the adhesive composition changes in accordance with an increase of an irradiation amount of the electromagnetic wave or particle beam irradiated to the adhesive composition under a predetermined temperature environment, such that the adhesive strength (i) increases to a first value when the irradiation amount reaches to a first predetermined amount, (ii) subsequently decreases from the first value to a second value when the irradiation amount increases to a second predetermined amount, and (iii) increases from the second value so that the adhesive strength becomes greater than the first value after the irradiation amount increases to more than a third predetermined amount, the first value being greater than the second value, the first predetermined amount being smaller than the second predetermined amount which is smaller than the third predetermined amount, the method comprising steps of: irradiating the electromagnetic wave or particle beam to the adhesive composition to change a state of the adhesive composition to a viscoelastic state in which the adhesive strength increases by pressure, thereby temporarily bonding the at least two adherends via the adhesive composition in the viscoelastic state; inspecting the temporarily bonded at least two adherends to determine whether correction of lamination is required; when it is required as a result of the inspection to correct lamination of the temporarily bonded at least two adherends, further irradiating the electromagnetic wave or particle beam to the adhesive composition so that the adhesive strength becomes in a predetermined range where the adhesive strength is smaller than the first value and is equal to or more than the second value, such that it is possible to peel at least one of the at least two adherends and the layer of the adhesive composition at an interface therebetween; and when it is not required as a result of the inspection to correct lamination of the temporarily bonded at least two adherends, further irradiating the electromagnetic wave or particle beam to the adhesive composition such that the adhesive strength becomes more than the first value to fully bond the at least two adherends.