34results about How to "Low yellowness" patented technology

The invention provides a multifunctional screen protection film which sequentially comprises a release film layer, an optimal adhesive layer, a base material layer and a multifunctional layer, wherein the optical adhesive layer is arranged on the release film layer, the base material layer is arranged on the optical adhesive layer, and the multifunctional layer is arranged on the base material layer and comprises an anti-blue-light agent, an antistatic agent and anti-newton's-ring coating resin. The multifunctional screen protection film has antistatic, anti-blue-light and anti-newton's-ring functions and has better anti-blue-light performance and the lower yellowing degree, so that the comfort degree of the screen protection film in use is increased. Besides, the multifunctional screen protection film is high in hardness, large in adhesive force, simple in structure, easy to produce and low in cost.

Provided is a process for the production of polylactic acid, by which a high-molecular-weight polylactic acid can be obtained at a low cost. A process for the production of polylactic acid which comprises polymerizing molten lactide using at least one plug flow reactor that has a Xi(t) value of 0.3 or smaller as calculated from numerical formula (1) [wherein E(t) is a residence time distribution function found by an impulse response method with a starch syrup having a viscosity of 3Pas, and t is the ratio of elapsed time (Theta) to mean residence time (Theta0)].

A reducing and bleaching composition for decoloured waste pulp is prepared from sodium dithionite (5-15 wt.%), chelating agent (1.25-15), sodium carbonate or sodium hydroxide or their mixture (0.25-3) and water (79.5-93.5) through uniform mixing. Its bleaching method features that the stabilizer and said composition are cooperated, and the oil or solvent not dissolved in water is added to isolate air, so improving the stability of bleaching liquid, reducing consumption of sodium dithionite and improving bleaching effect. Its advantages include less damage to strength and opaqueness of paper fibres, less corrosion to pipeline, less pollution and low cost.

A colloidal suspension of tungsten-doped SnO₂ particles is provided. It also pertains to the method for preparing such colloidal suspension and to its uses, especially in the manufacture of an antistatic coating for an optical article, such as an ophthalmic lens.

A polyimide precursor, a resin composition comprising the same, a polyimide resin film, a resin film, and a method for manufacturing the same. Provided are: a polyimide resin film which has low residual stress, little warpage, low yellowness (YI value) at high temperatures (particularly 430 DEG C or higher), low haze (Haze value), and excellent laser peelability from a substrate; and a method for producing the polyimide resin film. A polyimide precursor comprising: (a1) a structural unit L represented by general formula (1); and (a2) a structural unit M represented by general formula (2). The ratio of the amount of the structural unit M to the total amount of the structural unit L and the structural unit M is 0.005-0.5 mol%.

An object of the present invention is to provide an optical film capable of simultaneously achieving low yellowness (ZI value) and high elastic modulus. The solution of the present invention is an optical film comprising a polyamideimide resin. When the cross section of the membrane was measured by time-of-flight secondary ion mass spectrometry, the intensity ratio (A / B) of the methoxyl ion intensity (A) to the silicon ion intensity (B) was greater than or equal to 0.02.

The invention discloses a multifunctional AMOLED screen protection film which comprises a PET structure unit. A releasing film layer is arranged on the upper surface of the PET structure unit, a silicone rubber layer is arranged on the upper surface of the releasing film layer, and a multifunctional layer is arranged on the upper surface of the silicone rubber layer. Compared with the prior art, a material having a color modulation function is added to a PET base material, the color modulation function is achieved, a functional film improving the color of an AMOLED screen is obtained, the multifunctional layer has an anti-scratching function, an anti-reflection function, an anti-static function and an anti-dazzle function, so that the AMOLED screen has better anti-blue-light performance and also has smaller yellowness, and the using comfort of the screen protection film is improved. In addition, the multifunctional AMOLED screen protection film is high in hardness, good in attachment, simple in structure, easy to manufacture and low in cost.

A method for producing an oxymethylene copolymer which gives molded articles that are inhibited from emitting formaldehyde and can be reduced in yellowness is provided. In producing an oxymethylene copolymer, an effective polymerization initiator amount is regulated to a value within a given range, the amount being calculated from the amount of perchloric acid or a derivative thereof contained in the polymerization initiator and the amount of triethanolamine contained in all the monomers comprising trioxane and comonomers, which are starting materials for the copolymer.

The embodiment of the invention provides a touch substrate, a preparation method thereof and a display device. The touch substrate comprises a visible region, and the touch substrate comprises a cover plate substrate; the touch structure layer is located on one side of the cover plate substrate; and the chromaticity function layer is at least located in the visible region and is configured to reduce the yellow chromaticity of the visible region of the touch substrate. The chromaticity function layer can reduce the yellow chromaticity of the visible region of the touch substrate, and the situation that the chromaticity of the visible region of the touch substrate is slightly yellow is avoided.

The invention provides a polymethacrylate composition, an optical device made therefrom, and a display apparatus. The polymethacrylate composition includes 50 to 85 parts by weight of methacrylate series polymer, and 15 to 50 parts by weight of styrene series-maleic anhydride series copolymer. The methacrylate series polymer includes methacrylate series monomer unit and acrylate series monomer unit and has a weight average molecular weight (Mw) in a range between 20,000 and 200,000. Based on the total weight of the styrene series-maleic anhydride series copolymer, the styrene series-maleic anhydride series copolymer includes 76.5wt%-90wt% of styrene series monomer unit, and 10wt%-23.5wt% of maleic anhydride series monomer unit. A range of molecular weight distribution index (PDI) of the styrene series-maleic anhydride series copolymer is from 1.5 to 2.05.

The present disclosure relates to the processing of a flexible polyvinyl chloride foam having predetermined characteristics formed from a polyvinyl chloride emulsion including polyvinyl chloride resin and a plasticizer by controlling one or more of the following: a concentration of stabilizer in the final foam, a heating rate during processing, a maximum temperature during fusion, and/or a total residence time during heating. Predetermined characteristics of interest for a flexible PVC foam may include, for example, low yellowness, uniform density, high compression modulus and/or a uniform cell morphology.

The purpose of the present invention is to provide a method for forming a resin thin film laminate that makes it possible to preserve the exceptional performance attributes of exceptional heat resistance, low retardation, exceptional flexibility, and exceptional transparency, said resin thin film laminate being applied to a plastic thin film having exceptional performance as a base film of a flexible device substrate such as a flexible display substrate that can be easily peeled from a glass carrier. A method for producing a resin thin film laminate, said resin thin film laminate being characterized in that after a peeling layer is formed on a support substrate using a peeling-layer-forming composition containing a heat resistant polymer and an organic solvent, a resin thin film is formedon the peeling layer using a resin thin film-forming composition containing a heat resistant polymer and an organic solvent, and the peeling layer and the resin thin film are subsequently peeled fromthe support substrate as a single entity, said method being further characterized in that silicon dioxide particles having an average particle diameter of 100 nm or less as calculated from the specific surface area measured by nitrogen adsorption are incorporated in substantially only the resin thin film-forming composition.