Method for producing laminate
The present invention is to provide a method for producing a laminate having excellent adhesion properties. An embodiment of the present invention is a method for producing a laminate, the method including: a step 1 of dry-treating a surface A of a plastic to obtain a dry-treated plastic having a surface B that has been dry-treated; a step 2 of wiping the surface B with a cleaning tool containing a composition for wiping, the composition containing at least one solvent selected from the group consisting of water and polar solvents, and a silane coupling agent, to obtain a cleaned plastic having a surface C that has been wiped with the cleaning tool; and a step 3 of applying at least one selected from the group consisting of adhesives and primers on the surface C to obtain a laminated body.
1. A method for producing a laminate, the method comprising:
a step 1 of dry-treating a surface A of a plastic to obtain a dry-treated plastic having a surface B that has been dry-treated;
a step 2 of wiping the surface B with a cleaning tool containing a composition for wiping, the composition containing at least one solvent selected from the group consisting of water and polar solvents, and a silane coupling agent, to obtain a cleaned plastic having a surface C that has been wiped with the cleaning tool; and
a step 3 of applying at least one selected from the group consisting of adhesives and primers on the surface C to obtain a laminate.
2. The method for producing a laminate according to claim 1 , wherein the plastic is at least one selected from the group consisting of polyolefins, polyethylene terephthalates, polymethyl methacrylate resins, polycarbonate resins, polystyrene resins, acrylonitrile styrene copolymer resins, polyvinyl chloride resins, acetate resins, acrylonitrile butadiene styrene resins, polyester resins, and polyamide resins.
3. The method for producing a laminate according to claim 1 , wherein the dry treatment is at least one selected from the group consisting of plasma treatment, corona treatment, flame treatment, ITRO treatment, ultraviolet treatment, and excimer treatment.
4. The method for producing a laminate according to claim 1 , wherein, in the step 2, the surface B is wiped with the cleaning tool by applying a force from 25 to 0.25 kPa to the surface B.
5. The method for producing a laminate according to claim 1 , wherein the composition for wiping contains water as the solvent.
6. The method for producing a laminate according to claim 1 , wherein the silane coupling agent is an amine-based silane coupling agent.
7. The method for producing a laminate according to claim 1 , wherein
the silane coupling agent is at least one selected from the group consisting of
a silane compound having a hydrolyzable silyl group and an aliphatic hydrocarbon group having at least one selected from the group consisting of an amino group and an imino group,
a hydrolyzed condensate of the silane compound, and
an organic polymer-type silane coupling agent having a hydrolyzable silyl group and at least one selected from the group consisting of an amino group and an imino group and having an organic polymer as a main chain.
8. The method for producing a laminate according to claim 1 , wherein the silane coupling agent is water soluble.
9. The method for producing a laminate according to claim 1 , wherein a content of the silane coupling agent is from 0.01 to 30 mass % relative to a total amount of the composition for wiping.
10. The method for producing a laminate according to claim 1 , wherein a wetting tension of the surface B is 39 mN/m or greater.
11. The method for producing a laminate according to claim 1 , wherein a wetting tension of the surface C is 34 mN/m or greater.
12. The method for producing a laminate according to claim 1 , wherein the wetting tension of the surface B is greater than 65 mN/m.
13. The method for producing a laminate according to claim 12 , wherein the wetting tension of the surface C is greater than 45 mN/m.