Laminated polyolefin films and methods of production thereof by coextrusion
AssigneeTakemoto Yushi Kabushiki Kaisha
InventorsYukiyasu Itaya, Michiya Hiei, Toshiya Kamei
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Abstract
A laminated polyolefin film with two or more layers is produced by coextrusion. An outer-layer forming material is prepared by with olefin resin containing specified kinds of non-ionic surfactant and salt of organic sulfonic acid in a specified amount and at a specified ratio. In the production of the laminated polyolefin film by coextrusion, this outer-layer forming material is used to form either one or both of the outer layers if the laminated film is to have three or more layers and to form only one of the outer layers if the laminated film is to have only two layers.
Claims16
A method of producing a laminated polyolefin film with three or more layers including two outer layers, said method comprising the steps of:
- preparing an outer-layer forming material by causing olefin resin to contain a non-ionic surfactant and salt of organic sulfonic acid in a total amount of 0.05-3 weight % and at a weight ratio of 20/80-99/1;
- producing the laminated polyolefin film by using olefin resin and said outer-layer forming material in a coextrusion method and forming at least one of said outer layers from said outer-layer forming material;
- wherein said non-ionic surfactant comprises one or more selected from the group consisting of partial esters of polyoles with valence 3-6 and aliphatic monocarboxylic acid with 6-22 carbon atoms, alkyl diethanol amines with ailcyl group with 6-22 carbon atoms and alkyl diethanol amides with acyl group with 6-22 carbon atoms;
- and
- wherein said salt of organic sulfonic acid comprises one or more selected from the group consisting of alkali salts of alkyl sulfonic acid with alkyl group with 6-22 carbon atoms, alkali salts of alkyl aryl sulfonic acid with alkyl group with 2-22 carbon atoms and alkali salts of sulfo fatty acid ester with alkyl group with 2-22 carbon atoms.
A method of producing a laminated polyolefin film with two layers, said method comprising the steps of:
- preparing an outer-layer forming material by causing olefin resin to contain a non-ionic surfactant and salt of organic sulfonic acid in a total amount of 0.05-3 weight % and at a weight ratio of 20/80-99/1;
- producing the laminated polyolefin film with two layers by using olefin resin and said outer-layer forming material in a coextrusion method and forming one of said two layers from said outer-layer forming material;
- wherein said non-ionic surfactant comprises one or more selected from the group consisting of partial esters of pelyoles with valence 3-6 and aliphatic monocarboxylic acid with 6-22 carbon atoms, alkyl diethanol amines with alkyl group with 6-22 carbon atoms and alkyl diethanol amides with acyl group with 6-22 carbon atoms;
- and
- wherein said salt of organic sulfonic acid comprises one or more selected from the group consisting of alkali salts of alkyl sulfonic acid with alkyl group with 6-22 carbon atoms, alkali salts of alkyl aryl sulfonic acid with alkyl group with 2-22 carbon atoms and alkali salts of sulfo fatty acid ester with alkyl group with 2-22 carbon atoms.
Dependencies are inferred from the claim text.