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AssigneeOji Yuki Goseishi Co., Ltd.
InventorsTakashi Toyoda, Yasuji Hosono, Takashi Funato, Takao Yazaki, Akihiko Egashira, Takumi Matuno, Tokmi Chiba
Estimating the term…
A laminated resin sheet comprising (A) a laminated base material composed of (A.sup.1) an expanded resin layer and (A.sup.2) a non-expanded resin layer obtained by co-extrusion of (a.sup.1) a blowing agent-containing thermoplastic resin and (a.sup.2) a filler-containing thermoplastic resin containing 9 to 80% by weight of a filler through a T die, having laminated on at least one side thereof (B) synthetic paper comprising a stretched porous thermoplastic resin film containing an inorganic filler. The laminated resin sheet is light and highly rigid and exhibits a beautiful appearance with satisfactory printability and is therefore useful as various display materials and thermoformable sheeting for food trays, etc.
A laminated resin sheet capable of being thermoformed and having a thickness of from 60 to 5,000 .mu.m, comprising (A) a laminated base material having a three layer sandwich structure composed of (A.sup.2) a non-expanded resin layer, (A.sup.1) an expanded resin layer and (A.sup.2) a non-expanded resin layer, said laminated base material (A) being obtained by a process consisting essentially of co-extrusion of (a.sup.1) a thermoplastic resin containing a blowing agent and (a.sup.2) a thermoplastic resin containing from 9 to 80% by weight of a filler through a T die, said laminated base material (A) having laminated thereon, on at least one side thereof, void-containing synthetic paper (B) comprising a stretched film of a thermoplastic resin containing an inorganic filler.
A laminated resin sheet capable of being thermoformed and having a thickness of from 60 to 5,000 .mu.m, comprising (A) a laminated base material having a three layer sandwich structure composed of (A.sup.2) a non-expanded resin layer, (A.sup.1) an expanded resin layer and (A.sup.2) a non-expanded resin layer, said laminated base material (A) being obtained by a process consisting essentially of co-extrusion of (a.sup.1) a thermoplastic resin containing a blowing agent and (a.sup.2) a thermoplastic resin containing from 9 to 80% by weight of a filler through a T die, said laminated base material (A) having laminated thereon, on at least one side thereof, void-containing synthetic paper (B) having a thickness of from 10 to 300 .mu.m and comprising a biaxially stretched film of a thermoplastic resin containing from 8 to 65% by weight of an inorganic filler in such a manner that the void-containing synthetic paper (B) is positioned as the outermost layer of the laminated resin sheet.
A laminated resin sheet capable of being thermoformed and having a thickness of from 100 to 5,000 .mu.m, comprising (A) a laminated base material having a three layer sandwich structure composed of (A.sup.2) a non-expanded resin layer, (A.sup.1) an expanded resin layer and (A.sup.2) a non-expanded resin layer, said laminated base material (A) being obtained by a process consisting essentially of co-extrusion of (a.sup.1) a thermoplastic resin containing a blowing agent and (a.sup.2) a thermoplastic resin containing from 9 to 80% by weight of a filler through a T die, said laminated base material (A) having laminated thereon, on at least one side thereof, composite synthetic paper (B) having a thickness of from 50 to 500 .mu.m and comprising (B.sub.1) a biaxially stretched thermoplastic resin film having voids as a base layer and (B.sup.2) a uniaxially stretched thermoplastic resin film containing from 0.1 to 65% by weight of an inorganic filler as a paper-like layer in such a manner that the uniaxially stretched thermoplastic resin film (B.sup.2) is positioned as the outermost layer of the laminated resin sheet.
Dependencies are inferred from the claim text.