Method for producing sheetlike detergent
AssigneeKao Corporation
InventorsHideo Kobayashi, Masaki Sakamoto, Masahide Okumura, Hironobu Kawajiri, Keiichi Onoda, Masayasu Sato, Katsuhiko Kasai
Life of this patent
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Abstract
A method of producing a sheet type laundry detergent which comprises continuously or discontinuously applying a doughy detergent composition that has been prepared so as to have a viscosity of 1,000 mPa·s to 50,000 mPa·s at a shear rate of 10 s−1 to 1,000 s−1 onto a flexible support of continuous length that is running continuously in a prescribed direction under a shear rate condition of 10 s−1 to 1,000 s−1 by an application to form a thin layer of the doughy detergent composition.
Claims24
A method of producing a sheet laundry detergent which comprises continuously or discontinuously applying a doughy detergent composition on a flexible support of continuous length that is running continuously in a direction under a shear rate condition of 10 s−1 to 1,000 s−1 by an application means that is an extrusion die coater, to form a thin layer of said doughy detergent composition, wherein said flexible support is soluble or dispersible in water,
- wherein the doughy detergent composition has a viscosity of 16,450 to 35,000 mPa·s at a shear rate of 10 s−1 and a viscosity of 1,205 to 2,312 mPa·s at a shear rate of 1,000 s−1.
A method of producing a sheet laundry detergent which comprises continuously or discontinuously applying a doughy detergent composition on a flexible support of continuous length that is running continuously in a direction under a shear rate condition of 10 s−1 to 1,000 s−1 by an application means, wherein said flexible support is soluble or dispersible in water,
- wherein the doughy detergent composition has a viscosity of 16,450 to 35,000 mPa·s at a shear rate of 10 s−1 and a viscosity of 1,205 to 2,312 mPa·s at a shear rate of 1,000 s−1.
A method of producing a sheet laundry detergent which comprises forming a doughy detergent composition having a viscosity of 16,450 to 35,000 mPa·s at a shear rate of 10 s−1 and a viscosity of 1,205 to 2,312 mPa·s at a shear rate of 1,000 s−1, and wherein said doughy detergent composition comprising at least one each of surface active agents, alkalis, and sequestering agents is formed into a thin layer while said doughy detergent composition has a thixotropic flow index TR of 60 or smaller, wherein said doughy detergent composition is applied continuously or discontinuously on a water-soluble or water-dispersible flexible support of continuous length which is continuously running in a direction by an application means to form said thin layer, said thixotropic flow index TR being represented by formula (1):
- TR=(Δη(1)+Δη(10))×100 (1)
- wherein
- Δη(1)=η(1)UP−η(1)DOWN
- Δη(10)=η(10)UP−η(10)DOWN
- wherein η(1) is a viscosity measured at at shear rate of 1 s−1;
- η(10) is a viscosity measured at at shear rate of 10 s−1;
- subscript UP indicates “measured during loading”;
- and
- subscript DOWN indicates “measured during unloading”.
A method of producing a sheet laundry detergent which comprises forming a doughy detergent composition having a viscosity of 16,450 to 35,000 mPa·s at a shear rate of 10 s−1 and a viscosity of 1,205 to 2,312 mPa·s at a shear rate of 1,000 s−1, and wherein said doughy detergent composition comprising at least one each of surface active agents, alkalis, and sequestering agents is formed into a thin layer while said doughy detergent composition has a plastic flow index BF of 6 or smaller, wherein said doughy detergent composition is applied continuously or discontinuously on a water-soluble or water-dispersible flexible support of continuous length which is running continuously in a direction by an application means to form said thin layer, said plastic flow index BF being represented by formula (2):
- BF
- =
- (
- D
-
-
- η
- 2
- -
- D
-
-
- η
- 1
- D
-
-
- η
- 1
- )
- 2
- ×
- 100
-
-
- wherein
-
-
- D
-
-
- η
- 1
- =
- log
-
- η
-
- (
- 10
- )
- η
-
- (
- 1
- )
-
-
- D
-
-
- η
- 2
- =
- log
-
- η
-
- (
- 100
- )
- η
-
- (
- 10
- )
- (
- 2
- )
- wherein
- η(1) is a viscosity measured at a shear rate of 1 s−1;
- η(10) is a viscosity measured at a shear rate of 10 s−1;
- and
- η(100) is a viscosity measured at a shear rate of 100 s−1.
Dependencies are inferred from the claim text.