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Loudi recalls expired antioxidants
Can chemical raw material recycling factories accept a small amount? We recycle a wide variety of resins. We recycle resins no matter how large or small, we recycle resin products, we come to our door, and we collect high-priced cash from all over the place.
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Recycling dyes manufacturer Bokai Chemical Trade Recycling Company said that acid dyes are widely used in fabric dyeing and people often use them, but the color fastness of these dyes is usually very poor. Recycled dye manufacturers say that some users repair dyes that meet the standards. However, we need to pay attention to certain things that need to be paid attention to when fixing dyes. Let us take a look!
Loudi recalls expired antioxidants
For some heat-sensitive substrates and large parts, heating cannot be used to crosslink, and room temperature crosslinked water-based polyurethane coatings must be used. By combining with water-dispersible polyheterogeneity, the properties of water-based polyurethane prepolymer/ester mixtures, especially ester mixtures, can be improved. This type of waterborne polyurethane coatings uses a multi-heterocrosslinking agent, that is, a heteroprepolymer containing -NCO end groups, which is dispersed in a variety of polymers after hydrophilic treatment to form a dispersion. The water dispersion constitutes a polyurethane water-based coating that can be cured at room temperature. Compared with its solvent-based products, polyurethane (PU) emulsion and poly(PA) emulsion have the advantages of low cost, no burning, and no pollution to the environment.
Applicable technical guide: applied to dye nylon fibers with acid dyes, and then process the dyed products. After dyeing nylon fibers with acid dyes, the dyed product can be treated with NBS to improve its wet fastness, especially to water, sea water, washing, and sweat. The fastness can be significantly improved. Similar to all such additives, The degree of improvement in fastness varies depending on the dyeing method and fiber.
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Concentration of acid dye: 1.0-2.0% (owf) NBS (calculated based on cloth weight) After dyeing nylon fiber with TELONL, SUPRANOL or other selected acid dyes, wash it with soft water, and then dye the dyed product with NBS at PH4.5, 70-80℃, 20-30 minutes, post-treatment.
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Note: If you increase the amount of NBS by one third, you can also use hot air to complete the fixation operation. The wet fastness has been improved to a considerable extent, but the temperature should not exceed 180-185℃. If the temperature exceeds, or the saturated steam is treated, it will affect the NBS. When dissolving or diluting NBS, it is necessary to prevent direct contact with concentrated acetic acid. The contact of NBS with concentrated acetic acid will cause precipitation. Any precipitation that has occurred can be easily dissolved by adding a small amount of ammonia.
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If there are non-ionic additives in the post-treatment, it will cause precipitation and impair the NBS effect (before fixing, it can be washed with a soaping agent to prevent abnormalities). If the dyed product is coated with PU or film in the later process, do not fix it with NBS, otherwise it will affect its adhesion effect. The nylon batting that uses NBS as a post-treatment feels very rough, which will affect its subsequent weaving operations. Therefore, for this kind of dyeing, only dyes with higher wet fastness should be selected for dyeing, without fixing treatment.
Loudi recalls expired antioxidants
Substances that can significantly pollute the environment, such as benzene, and the emission of hazardous waste gas pollutants (HAPs), as a solvent system coating, it also has good coating and construction performance, and can be constructed under low temperature conditions in winter. In addition, due to the low solubility of the solvent in the coating system, it will not cause corrosion, so it is easy to recoat. It can also be used to spray materials that are easily corroded by solvents. 2. Component number Polyester paint (PE): 3-4 components, 3 components are non-wax polyester paint, 4 components are wax type polyester paint. Component one is the benzene solution of unsaturated polyester (main agent); component two is the initiator (also known as curing agent, hardener, common name white water);
In summary, the contents of the above are related matters shared by the recycled fuel manufacturers. Bokai Chemical Trade Recycling Co., Ltd. supports door-to-door recycling of chemical raw materials, recycling of dyes, recycling of paint raw materials, high-priced recycling and other businesses. If you have any needs in this regard, please call for consultation!
