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Low-temperature activating and bleaching method by using water-soluble metalloporphyrin
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A metalloporphyrin, low-temperature activation technology, applied in the field of low-temperature activation and bleaching, can solve the problems of rough hand feeling, difficult penetration and low production efficiency of fabrics, and achieve the effects of reducing the pH of the working solution and shortening the stacking time.
Active Publication Date: 2010-12-22
DONGHUA UNIV
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Abstract
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Problems solved by technology
[0006] Disadvantages of high-temperature bleaching process: high energy consumption during processing, large reduction in fiber strength, rough fabric feel after treatment, etc.
[0008] Disadvantages of conventional cold pad batch bleaching: low process temperature, high alkali concentration, and difficult penetration. At present, the pretreatment time of cold pad batch is mostly about 24 hours, and the production efficiency is low.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Embodiment 1
[0034] (1) Preparation of bleaching liquid
[0035] Prepare the bleach in a 1000ml beaker, its components are, H 2 o 2 (30%) 30g / L, cobaltporphyrin tetrasulfonate 9 μmol / L, adjust the working solution to 7 with NaOH, penetrant 2g / L, stabilizer 0.2g / L.
[0036] (2) Padding process
[0037] Keep the liquid-carrying rate of 90%-100%, two dipping and two rolling.
[0041] Wash in hot water, wash in cold water and tumble dry in forced air oven.
Embodiment 2
[0043] (1) Preparation of bleaching liquid
[0044] Prepare the bleach in a 1000ml beaker, its components are, H 2 o 2 (30%) 30g / L, cobaltporphyrin tetrasulfonate 6 μmol / L, adjust the working solution to 9.5 with NaOH, penetrant 2g / L, stabilizer 0.2g / L.
[0045] (2) Padding process
[0046] Keep the liquid-carrying rate of 90%-100%, two dipping and two rolling.
[0050] Wash in hot water, wash in cold water and tumble dry in forced air oven.
Embodiment 3
[0052] (1) Preparation of bleaching liquid
[0053] Prepare the bleach in a 1000ml beaker, its components are, H 2 o 2 (30%) 30g / L, tetrasulfonate cobaltporphyrin 3 μmol / L. Regulate working solution with NaOH to 9.5, penetrant 2g / L, stabilizer 0.2g / L.
[0054] (2) Padding process
[0055] Keep the liquid-carrying rate of 90%-100%, two dipping and two rolling.
[0057] After padding the bleaching solution, put the fabric into a sealed bag and seal it tightly, and steam it in a blast oven at 80°C for 1 hour.
[0058] (4) Washing and drying
[0059] Wash in hot water, wash in cold water and tumble dry in forced air oven.
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Abstract
The invention relates to a low-temperature activating and bleaching method by using water-soluble metalloporphyrin, belonging to the field of low-temperature activating and bleaching method. The method comprises the following steps: (1) mixing the water-soluble metalloporphyrin, H2O2, a penetrant and a stabilizer to obtain a bleaching work liquid; (2) padding textiles in the bleaching work liquid; and (3) carrying out cold batching or steaming on the padded textiles, and then washing with water. The method is simple, has the advantages of low cost, high production efficiency, environmental friendliness and energy saving and is suitable for industrialized use. Besides, the method lowers the bleaching temperature, shortens the batching time and reduces damage to textiles on the premise of achieving a fine bleaching effect.
Description
technical field [0001] The invention belongs to the field of low-temperature activation bleaching methods, in particular to a low-temperature activation bleaching method using water-soluble metal porphyrins. Background technique [0002] Hydrogenperoxide bleaching is an important process in the pretreatment of textiles. The bleached fabric has high whiteness, no yellowing, and little environmental pollution, so it is widely used in the pretreatment bleaching process of various fabrics. [0003] Conventional hydrogenperoxide bleaching includes: high temperature bleaching and cold pad batch bleaching. [0004] 1) The technological process of high-temperature bleaching is: padding and bleaching solution→steaming→washing→drying. [0005] The bleaching solution contains hydrogenperoxide (100%) 2-15g / L, adjust the pH value to 10.5-11 with caustic soda, add a proper amount of stabilizer and wetting agent, pad the bleaching solution at room temperature, steam at 95°C-100°C for 4...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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