LAMINATE FILM, MOLDED LAMINATE, AND METHOD FOR PRODUCING SAME
Provided is a laminate film that exhibits an excellent appearance, chemical resistance, and weather resistance, and suppresses yellowing even after long-term heating. The laminate film is formed from a surface layer including a vinylidene fluoride resin (F) and an acrylic resin composition (Y) layer, the acrylic resin composition (Y) containing a hindered amine light stabilizer having a molecular weight of 1400 or more. Further provided is a molded laminate including a base material and the laminate film laminated to the base material. Further provided is a method for producing a molded laminate including a step for producing a preform body by vacuum forming or pressure forming the laminate film in a first die, and a step for integrating the preform body and the base material by injection molding the resin that is to be the base material in a second die.
1 . A laminate film comprising:
a surface layer comprising a vinylidene fluoride-based resin (F), and
a layer comprising an acrylic resin composition (Y),
wherein the acrylic resin composition (Y) comprises a hindered amine-based light stabilizer having a molecular weight of 1400 or more.
2 . The laminate film according to claim 1 , wherein the surface layer further comprises an acrylic resin (A F ).
3 . The laminate film according to claim 1 , wherein:
the surface layer further comprises an acrylic resin (A F ),
the vinylidene fluoride-based resin (F) is present in the surface layer in an amount of 62% by mass or more, based on a total mass of the vinylidene fluoride-based resin (F) and the acrylic resin (A F ) in the surface layer and
the acrylic resin (A F ) is present in the surface layer in an amount of 38% by mass or less, based on the total mass of the vinylidene fluoride-based resin (F) and the acrylic resin (A F ) in the surface layer.
4 . The laminate film according to claim 1 , wherein:
the surface layer further comprises an acrylic resin (A F ),
the vinylidene fluoride-based resin (F) is present in the surface layer in an amount of 62% to 78% by mass, based on a total mass of the vinylidene fluoride-based resin (F) and the acrylic resin (A F ) in the surface layer, and
the acrylic resin (A F ) is present in the surface layer in an amount of 22% to 38% by mass, based on a total mass of the vinylidene fluoride-based resin (F) and the acrylic resin (A F ) in the surface layer.
5 . The laminate film according to claim 1 , wherein the hindered amine-based light stabilizer is present in the acrylic resin composition (Y) in an amount of 0.1 to 5 parts by mass relative to 100 parts by mass of a resin component in the acrylic resin composition (Y).
6 . The laminate film according to claim 1 , wherein the molecular weight of the hindered amine-based light stabilizer is 2000 or more.
7 . The laminate film according to claim 1 , wherein the molecular weight of the hindered amine-based light stabilizer is 2400 or more.
8 . The laminate film according to claim 1 , wherein a 10% mass reduction temperature of the hindered amine-based light stabilizer is 380° C. or higher based on thermogravimetric analysis.
9 . The laminate film according to claim 1 , wherein the hindered amine-based light stabilizer has, in its molecular structure, a piperidine skeleton and an amino group other than the piperidine skeleton.
10 . The laminate film according to claim 9 , wherein the amino group is an amino group derived from a tertiary amine.
11 . The laminate film according to claim 1 , wherein the hindered amine-based light stabilizer is a copolymer of a reactive hindered amine-based light stabilizer.
12 . The laminate film according to claim 1 , wherein the acrylic resin composition (Y) further comprises a hindered amine-based light stabilizer having a molecular weight of less than 1400, in an amount of 1 part by mass or less relative to 100 parts by mass of a resin component in the acrylic resin composition (Y).
13 . The laminate film according to claim 1 , wherein the surface layer further comprises a hindered amine-based light stabilizer, in an amount of 0.1 part by mass or less relative to 100 parts by mass of a resin component in the surface layer.
14 . A molded laminate comprising:
a base, and
the laminate film according to claim 1 , laminated on the base.
15 . A method for producing a molded laminate, comprising:
producing a preliminary molded article by vacuum molding or pressure molding the laminate film according to claim 1 in a first die; and
integrating the preliminary molded article and a base by injection molding a resin that is to be the base in a second die.
16 . A laminate film comprising:
a surface layer comprising a vinylidene fluoride-based resin (F), and
a layer comprising an acrylic resin composition (Y),
wherein:
an increase in an amount of yellowness (ΔYI) after heating for 500 hours in an atmosphere with a temperature of 100° C. is 3.0 or less when compared to before heating, and
a light transmittance T 1080 at a wavelength of 323 nm after having exposure to an integrated light amount of 1080 MJ/m 2 by using an ultra accelerated weathering tester is 20% or less.