Production technology of extrahigh viscosity refining cotton

Abstract

The present invention relates to a production process of extra high viscosity refined cotton. Said production process includes the following procedure:(1) selecting material; (2) cooking; (3) washing pulp; (4) bleaching pretreatment; (5) bleaching; and (6) rolling, dewatering and drying to obtain finished product. Said invention also provides the concrete requirements and steps of every procedure.

Description

technical field

[0001] The invention relates to a production process of refined cotton, more specifically to a production process of ultra-high-viscosity refined cotton with a viscosity exceeding 800 mPa·s. Background technique

[0002] Extra-high-viscosity refined cotton refers to ultra-high-viscosity refined cotton with a viscosity exceeding 800 mPa·s. Mainly used as a chemical thickener, the higher the viscosity, the better the thickening property. The traditional refined cotton production process generally adopts the following production processes: 1), material selection; 2) cooking: put cotton linters into steaming balls, and add alkali; 3), pulp washing: the cooked pulp is washed by rotary pulp; 4), pretreatment before bleaching; 5), bleaching; 6), rolling, dehydrating, and drying to make finished products. Such as: CN1470688A (application number: 02128307.9) discloses a kind of degreasing bleached cotton fiber for spunlace non-woven fabric and its production method....

Examples

Embodiment Construction

[0004] 1) Material selection: select cotton linters with maturity ≥ 80%, no miscellaneous appearance, no foreign fibers, and fiber length between 8-10 mm as raw materials;

[0005] 2) Cooking:

[0006] a. Pre-cooking: put the raw materials into the steaming ball, add NaOH and Na 2 SO 3 Aqueous solution, pH value 8-10, dissolving ratio 1: 3-5, containing NaOH and Na by weight 2 SO 3 The concentration of NaOH in the aqueous solution is 2.1-2.6%, Na 2 SO 3 The concentration is 1-3%, and the ball is steamed at room temperature for 15-30 minutes;

[0007] b. The first stage of cooking: control the temperature in the steaming ball at 110-120°C, control the pressure at 0.1-0.3MPa, and cook for 50-70 minutes in the first stage;

[0008] c. Final stage cooking: control the temperature inside the steaming ball between 130-150°C, control the pressure at 0.3-0.6MPa, and final stage cooking for 70-120 minutes;

[0009] 3) Pulp washing: wash pulp with clean water or neutralized and r...

technical field

[0001] The invention relates to a production process of refined cotton, more specifically to a production process of ultra-high-viscosity refined cotton with a viscosity exceeding 800 mPa·s. Background technique

[0002] Extra-high-viscosity refined cotton refers to ultra-high-viscosity refined cotton with a viscosity exceeding 800 mPa·s. Mainly used as a chemical thickener, the higher the viscosity, the better the thickening property. The traditional refined cotton production process generally adopts the following production processes: 1), material selection; 2) cooking: put cotton linters into steaming balls, and add alkali; 3), pulp washing: the cooked pulp is washed by rotary pulp; 4), pretreatment before bleaching; 5), bleaching; 6), rolling, dehydrating, and drying to make finished products. Such as: CN1470688A (application number: 02128307.9) discloses a kind of degreasing bleached cotton fiber for spunlace non-woven fabric and its production method....

Examples

Embodiment Construction

[0004] 1) Material selection: select cotton linters with maturity ≥ 80%, no miscellaneous appearance, no foreign fibers, and fiber length between 8-10 mm as raw materials;

[0005] 2) Cooking:

[0006] a. Pre-cooking: put the raw materials into the steaming ball, add NaOH and Na 2 SO 3 Aqueous solution, pH value 8-10, dissolving ratio 1: 3-5, containing NaOH and Na by weight 2 SO 3 The concentration of NaOH in the aqueous solution is 2.1-2.6%, Na 2 SO 3 The concentration is 1-3%, and the ball is steamed at room temperature for 15-30 minutes;

[0007] b. The first stage of cooking: control the temperature in the steaming ball at 110-120°C, control the pressure at 0.1-0.3MPa, and cook for 50-70 minutes in the first stage;

[0008] c. Final stage cooking: control the temperature inside the steaming ball between 130-150°C, control the pressure at 0.3-0.6MPa, and final stage cooking for 70-120 minutes;

[0009] 3) Pulp washing: wash pulp with clean water or neutralized and r...