Biodegradable fiber and non-woven fabric
AssigneeChisso Corporation
InventorsYuji Nakajima, Masahiko Taniguchi
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Abstract
There is disclosed a biodegradable composite fiber comprising a first component consisting of a single component fiber produced by melt-spinning a biodegradable polymer composition consisting of a starch-based polymer, a partially hydrolyzed copolymer of vinyl acetate and an unsaturated monomer containing no functional groups, an aliphatic polyester, a decomposition accelerating agent, and a plasticizer, or such a biodegradable polymer composition; and a second component consisting of an aliphatic polyester, in which the first component is present continuously in the lengthwise direction over at least a part of the surface of the fiber of the second component, and there is also disclosed a non-woven fabric, a knitted fabric, and a molded article produced from this fiber.
Claims15
A biodegradable composite fiber comprising a core component comprising of a biodegradable aliphatic polyester and a sheath component surrounding said core component comprising a biodegradable polymer composition comprising a starch-based polymer and a polymer selected from the group consisting of an aliphatic polyester, a partially hydrolyzed copolymer of vinyl acetate and an unsaturated monomer containing no functional groups, and mixtures thereof, wherein the surface of the sheath component is treated with a metal salt of an alkyl phosphate to control discoloration of the starch-based polymer by air.
A process for producing a non-woven fabric comprising the steps of forming a web of fibers and bonding the fibers to form said non-woven fabric, wherein each of said fibers comprises a core component comprising of a biodegradable aliphatic polyester and a sheath component surrounding said core component comprising a biodegradable polymer composition comprising a starch-based polymer and a polymer selected from the group consisting of an aliphatic polyester, a partially hydrolyzed copolymer of vinyl acetate and an unsaturated monomer containing no functional groups, and mixtures thereof, the surface of said sheath component being treated with a metal salt of an alkyl phosphate to control discoloration of the starch-based polymer by air.
Dependencies are inferred from the claim text.