Method for modifying fibers
AssigneesAichi Prefectural Government, Ichinomy Fashion Design Center Foundation, Shin-Etsu Chemical Co., Ltd.
InventorsNaosuke Maruyama, Kazuhisa Hayakawa, Soji Tanioka, Hidenori Tsuduki, Tsuyoshi Shikano, Hiroshi Kawamura, Tsuneo Hayata
Life of this patent
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Abstract
A method for modifying fibers is provided, which method comprises suspending and dispersing in water under shear force a cellulose ether having such a low degree of substitution that a molar degree of substitution with an alkyl group and/or a hydroxyalkyl group ranges from 0.05 to 1.3, applying the resulting dispersion and a crosslinking agent or an aqueous resin emulsion to fibers, and thermally treating the applied fibers.
Claims16
A method for modifying fibers consisting essentially of the steps of:
- dispersing a cellulose ether having such a low degree of substitution that a molar degree of substitution with an alkyl group and/or a hydroxyalkyl group ranges from 0.05 to 1.3 in water, or an aqueous solution of an alkali and adjusting the concentration of alkali if the aqueous solution has a concentration of an alkali greater than 1% by weight, to produce a dilute alkali aqueous solution having a concentration of an alkali of 1% by weight or less, which is a dispersion to be sheared,
- shearing the dispersion to be sheared under shear force to produce a sheared dispersion,
- applying a combined composition of the resulting sheared dispersion and a crosslinking agent or an aqueous resin emulsion to said fibers, and
- thermally treating the dispersion-applied fibers;
- wherein the fibers are selected from the group consisting of wool, silk, cashmere, and blends of polyesters and wool.
A method for modifying fibers consisting essentially of the steps of:
- dissolving a cellulose ether having such a low degree of substitution that a molar degree of substitution with an alkyl group and/or a hydroxyalkyl group ranges from 0.05 to 1.3 in an alkali aqueous solution having a concentration of an alkali of 2 to 25% by weight, the alkali solution is then milled under shear by means of a colloid mill or ground through collision by use of a homogenizer while the solution is neutralized to a concentration of an alkali of 1% by weight or less, thereby obtaining a sheared dispersion,
- applying a combined composition of the sheared dispersion and a crosslinking agent or an aqueous resin emulsion to said fibers, and
- thermally treating the dispersion-applied fibers;
- wherein the fibers are selected from the group consisting of wool, silk, cashmere, and blends of polyesters and wool.
A method for modifying fibers consisting essentially of the steps of:
- dispersing a cellulose ether having such a low degree of substitution that a molar degree of substitution with an alkyl group and/or a hydroxyalkyl group ranges from 0.05 to 1.3 in water or an aqueous solution of an alkali and adjusting the concentration of alkali, if the aqueous solution has a concentration of an alkali greater than 1% by weight, to produce a dilute alkali aqueous solution having a concentration of an alkali of 1% by weight or less which is a dispersion to be sheared,
- shearing the dispersion to be sheared under shear force to produce a sheared dispersion,
- applying a combined composition of the resulting sheared dispersion and a crosslinking agent or an aqueous resin emulsion to said fibers, and
- thermally treating the dispersion-applied fibers;
- wherein said crosslinking agent is a polyfunctional isocyanate compound having more than one isocyanate group in a molecule.
A method for modifying fibers consisting essentially of the steps of:
- dispersing a cellulose ether having such a low degree of substitution that a molar degree of substitution with an alkyl group and/or a hydroxyalkyl group ranges from 0.05 to 1.3 in water or an aqueous solution of an alkali and adjusting the concentration of alkali, if the aqueous solution has a concentration of an alkali greater than 1% by weight, to produce a dilute alkali aqueous solution having a concentration of an alkali of 1% by weight or less which is a dispersion to be sheared,
- shearing the dispersion to be sheared under shear force to produce a sheared dispersion,
- applying a combined composition of the resulting sheared dispersion and a crosslinking agent or an aqueous resin emulsion to said fibers, and
- thermally treating the dispersion-applied fibers;
- wherein said cellulose ether is a low-substituted hydroxypropyl cellulose having a molar degree of substitution of from 0.1 to 0.7.
Dependencies are inferred from the claim text.