30results about How to "Maintain whiteness" patented technology

A heated mixture comprising dehydroxylated kaolin and a high refractive index pigment is disclosed. When the dehydroxylated kaolin is metakaolin, the heated mixture has a GE brightness greater than 86% and a Hunter yellowness index of less than about 11. When the dehydroxylated kaolin is fully calcined kaolin, the heated mixture has a GE brightness greater than 89%. The heated mixture is advantageously used in decorative paper.Also disclosed are methods of using and making the decorative paper, and decorative laminates containing the decorative paper.

The invention relates to a prescription of an anti-yellowing agent and in particular relates to a prescription of a anti-yellowing agent for fibers (such as nylon and nylon elastic fiber). The anti-yellowing agent is characterized by comprising the following components in parts by weight: 10.0-20.0 parts of an emulsifying agent, 20.0-50.0 parts of sulfonic acid, 10.0-40.0 parts of alcohols and the balance being 40.0-10.0 parts of water. The cost of the prescription of the anti-yellowing agent is low and reduced by 10-15% in comparison with the cost of imported finished products, and the anti-yellowing agent has a good anti-yellowing effect. The anti-yellowing agent has the advantages of no formaldehyde, no heavy metal ions, no teratogenesis, no mutagenesis, no carcinogenic actions, no toxic side effect on a human body, conforms to the requirements of the EU (European Union) OeKo-TEX Standard 100 and the requirements of the REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) standard, and can well keep the whiteness and the vividness of fabrics.

The invention provides a cleaning product containing styrene-acrylic acid-maleic anhydride copolymer. In the invention, the styrene-acrylic acid-maleic anhydride copolymer has a hydrophilic anion functional group and a hydrophobic carbon-carbon chain structure and is capable of endowing molecules with excellent hydrophilic and lipophilic properties; a styrene and acrylic acid chain has a functionof absorbing dirt; acrylic acid and maleic anhydride have electrostatic repulsion and can stably disperse the copolymer absorbing dirt in a cleaning solution, so that the copolymer can achieve an effect of resisting against dust deposition during the cleaning process. When the cleaning product provided by the invention is used for cleaning polyester fiber fabrics, an excellent effect of resistingagainst dust deposition can be achieved, the whiteness of fabrics can be maintained and the color and luster of fabrics can be protected.

The invention discloses a fiber antioxidant. The fiber antioxidant is prepared from the following components in parts by weight: 0.1 to 10 parts of emulsifier, 0.1 to 20 parts of surfactant, 10 to 50parts of alcohols, 0.5 to 15 parts of benzylhydroxylamine and 10 to 89.7 parts of water. The antioxidant has the advantages of low cost, good antioxidant effects on white and light fiber fabrics, capability of meeting relevant EU standards and no toxic or side effects on a human body. Meanwhile, the invention also discloses a preparation method of the fiber antioxidant. The preparation method comprises the following steps: firstly, adding an emulsifier and a surfactant into a reaction still according to component amounts and stirring; secondly, adding the benzylhydroxylamine and the alcohols according to the component amounts, heating and stirring for reacting, and adding water until the material reacts to obtain transparent liquid; thirdly, adding the remaining amount of water after cooling and stirring, thus obtaining a finished product. The preparation method is simple and easy to operate and easily realizes industrialization.

The present invention relates to a spandex fiber containing an inorganic chlorine-resistant agent, such as a hydrotalcite compound, a mixture mineral of huntite and hydromagnesite, hydromagnesite, zinc oxide, or magnesium oxide, and a symmetrically di-hindered hydroxyphenyl-based additive, which improves the chlorine resistance of the spandex fiber, and a production method thereof. The spandex fiber has excellent chlorine resistance, and thus can be more effectively used for sports or leisure wear such as swimwear.

The invention discloses a preparation method of core-shell structure high-white precipitated calcium carbonate. The method comprises the steps that digesting, screening, impurity removing and aging are conducted on low-quality-level and low-white quick lime, a crystalline form controlling agent is added to conduct carbonation reaction, and a formed low-white calcium carbonate particle is taken asa core; digesting, screening, impurity removing and ageing are conducted on high-white quick lime, the high-white quick lime is grafted to a core surface after carbonation reaction to be taken as a housing, filter pressing dehydrating, drying, pulverizing and grading are conducted after the reaction is completed, and the core-shell structure high-white precipitated calcium carbonate is obtained. According to the method, the white level of a calcium carbonate product with the white level of below 90 degrees can be improved to 90 degrees or above by the calcium carbonate prepared by the method,particular diameter distribution of the product is concentrated, the dispersing performance is good, the calcium carbonate is applied to PVC panels and tubular materials, and processing performance, whitening and toughening are achieved. The product technology is simple and implementable, the cost is low, the price is cheap, and the economic benefits are better.

The invention provides a modified-chitosan-containing anti-ultraviolet finishing agent for cotton fabric and anti-ultraviolet cotton fabric obtained by aid of the anti-ultraviolet finishing agent. The modified-chitosan-containing anti-ultraviolet finishing agent for the cotton fabric is a uniformly mixed solution of 3,4,5-trimethoxybenzoyl chitosan, a crosslinking agent, a penetrant and an acetic acid or lactic acid solution, wherein the crosslinking agent is organic polycarboxylic acid or amino-modified silicone oil emulsion; the penetrant is either JFC or peregal O. The anti-ultraviolet cotton fabric with anti-ultraviolet, anti-bacterial and anti-crease finishing functions is obtained through double-dip double-nip, water washing and drying, the anti-ultraviolet, anti-bacterial and anti-crease finishing functions are high in durability, the cotton fabric still maintains the original style of the fabric after finishing, the hand feel, the strength, the whiteness and the color of the cotton fabric are not affected, and the original human body affinity is maintained; the finishing agent is simple in composition and easy to prepare, and a finishing process is simple and environment-friendly.

An ink jet recording method includes: heating a recording medium; and ejecting a white color water-based ink composition from an ink jet head to a recording medium heated in the heating of the recording medium and causing the white color water-based ink composition to adhere to the recording medium, the causing of the white color water-based ink composition to adhere is performed by performing scanning, in which the ink composition is ejected while relative positions between the ink jet head and the recording medium are changed in a scanning direction, a plurality of times, and a maximum time of the scanning performed once is equal to or greater than 0.8 seconds, and the white color water-based ink composition contains first particles that are a white color pigment and second particles that are particles of a different kind from the first particles and that are inorganic fine particles.