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AssigneeFuji Photo Film Co., Ltd.
InventorsTadahiro Kegasawa, Ryuichi Katsumoto, Masanori Takase, Hidetoshi Okamura
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In the resin film forming method for extruding a fused resin from an extruder die to form a resin film, the second resin forming both ends in width direction of the resin film uses a resin greater in extension viscosity than the first resin forming the center in width direction of the resin film. Thereby, even if production conditions such as resin condition and operating conditions change, faults such as neck-in and its resultant thickening at both ends of the resin film can be suppressed. In the production of a laminate by nipping a support and a resin film of a thermoplastic resin by means of a nip roller and a cooling roller while coating the resin film onto the surface of the support, the accompanying air following the rotation of the cooling roller to the nip point is shut off by blowing a gas permeable through the resin film from a gas jet nozzle toward the surface of the cooling roller. Thereby, the occurrence of craters can be inhibited, a laminate excellent in surface appearance can be produced and the production of a laminate effective especially at the time of a line speed rise in the laminate production is performable.
A resin film forming method for extruding fused resin from an extruder die to form a resin film, wherein a resin forming both ends in width direction of the resin film has an extension viscosity higher than that of a resin forming a center in width direction of the resin film.
A resin film forming method for extruding fused resin from an extruder die to form a resin film, wherein a resin forming both ends in width direction of the resin film has an MFR smaller than that of a resin forming a center in width direction of the resin film.
A resin film forming method for extruding fused resin from an extruder die to form a resin film, wherein a resin forming both ends in width direction of the resin film has a higher extension viscosity and smaller MFR than those of a resin forming a center in width of the resin film.
A laminate production method for producing a laminate by nipping a running support and a resin film of thermoplastic resin by means of a nip roller and a cooling roller while coating the surface of the support with the resin film, wherein the accompanying air brought with rotation of the cooling roller to a nip point for the support and the resin film is shut off by blowing a gas permeable through the resin film toward the surface of the cooling roller.
A laminate production apparatus for producing a laminate by nipping a running support and a resin film of thermoplastic resin by means of a nip roller and a cooling roller while coating the surface of the support with the resin film, wherein a gas jet nozzle for jetting a gas permeable through the resin film toward the surface of the cooling roller is provided near a nip point for the support and the resin film.
Dependencies are inferred from the claim text.