14 results about "Cellulose triacetate" patented technology

The invention relates to an ultra-thin dye polaroid, a preparation method and an ultra-thin circular polaroid, and the ultra-thin dye polaroid comprises polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol and a dye dispersed in the polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol in a dissolving mode. According to the invention, dye is dissolved and dispersed in polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol, and the ultrathin dye polaroid is finally obtained through the steps of mixing, extrusion, coating, curtain coating, one-way calendering, stretching and drying. On one hand, a dissolving and dispersing mode is adopted, dye dispersion is more uniform, and the polarization degree and the light transmittance of all parts of the polaroid are guaranteed; on the second aspect, the polaroid does not need to be clamped and fixed by a cellulose triacetate film, so that the thickness of the polaroid can be further reduced; and thirdly, the retarder is compounded on the ultrathin dye polaroid, so that the purpose of manufacturing the ultrathin circular polaroid is achieved.

The invention relates to the technical field of fibers, and discloses a cellulose acetate composite fiber and a preparation method and application thereof in yarns, the cellulose acetate composite fiber comprises polyacrylonitrile, cellulose triacetate and cyano ester polyquaternium according to a ratio of (65-80) g: (20-35) g: (3-8) g; the compatibility between the cellulose triacetate and the polyacrylonitrile is improved by the cyano ester polyquaternium, and the breaking strength and the breaking elongation of the composite fiber are remarkably improved. The cyano ester polyquaternary ammonium salt contains a large number of antibacterial quaternary ammonium salt groups and is uniformly dispersed in matrixes of cellulose triacetate and polyacrylonitrile, so that more antibacterial sites are provided, the antibacterial property of the fiber is remarkably improved, and the antibacterial property of the fiber is remarkably improved.

The invention belongs to the technical field of water treatment membranes, and particularly relates to a spiral-wound membrane grid material as well as a preparation method and application thereof. A preparation method of a spiral-wound membrane grid material comprises the following steps: S1, dissolving cellulose triacetate in a solvent to form a cellulose triacetate solution, dissolving polyethylene glycol in deionized water to form a polyethylene glycol solution, mixing the cellulose triacetate solution and the polyethylene glycol solution, adding an emulsifier, and carrying out emulsification treatment to obtain an emulsion, performing electrostatic spinning on the emulsion to form a fiber membrane on a supporting grid, and performing vacuum drying to obtain a composite membrane; s2, washing the composite membrane with deionized water, and soaking the composite membrane in a modification liquid for post-treatment to obtain a porous composite membrane; s3, the porous composite film and the porous grid are alternately stacked and subjected to hot pressing combination, then winding forming is conducted, and a roll type film grid material is obtained; the spiral-wound membrane grid material has high porosity and good desalination rate, and can be applied to the fields of separation, filtration or catalysis and the like.

The utility model relates to the field of optical lenses, in particular to a polarized glasses lens which comprises a first coating layer, a first reinforcing layer, a polarized layer, a color layer, a light conversion layer, a second hardening layer and a second coating layer which are sequentially arranged in a stacked mode in the light incidence direction. The first reinforcing layer adopts a specific film and is bonded through optical transparent ultraviolet curing, the polarization layer is a linear polarizer with a specific structure and forms a certain included angle with the light conversion layer, the color layer is a blue light, color light and other light filtering layer, and the light conversion layer adopts a cellulose triacetate film subjected to uniaxial stretching treatment. The second hardening layer is an ultraviolet curing resin layer, and the second coating layer is an anti-reflection and anti-reflection film layer so as to improve light transmittance and reduce reflection. Various technical effects of resisting reflection, enhancing the strength of the lens, realizing a polarization function, filtering blue light, converting a light polarization state, depolarizing and the like are achieved.

An environmentally friendly, low-leaching cellulose triacetate (TAC) membrane comprises a three-layer or higher laminated structure. The raw materials include cellulose, plasticizer, leaching-resistant UV absorber, leaching-prone UV absorber, and organic solvent. The preparation method is as follows: S1, preparing a steel strip layer, an intermediate layer, and an air layer for the TAC membrane, forming corresponding sizing solutions; S2, extruding the three-layer sizing solutions and evenly spreading them onto a stainless steel strip to form a liquid film, which is then formed through multi-layer casting. The liquid film is placed in a drying oven for preliminary drying, and when its moisture content reaches 25 wt%, it is peeled off from the steel strip and enters the transition and post-drying stages; S3, edge trimming, balancing, embossing, and winding yield the TAC membrane. This invention employs a multi-layered, differentiated layout of UV absorbers and precise process control, significantly reducing UV absorber leaching; it uses an environmentally friendly UV absorber system with low halogen content; the raw materials are readily available and low-cost; the process is compatible with existing production lines and is easy to mass-produce.

The present patent of invention relates to an innovative composition with excellent non-flammable and self-extinguishing properties for composite materials, from which many useful molded materials can be produced, and also to the provision of inorganic compounds coated with an inert material, defined as a material that does not exhibit reactivity with the inorganic compounds. The present invention provides organic materials and, more particularly, relates to highly polymeric materials having excellent fire-retardant properties, such as those employed in the manufacture of molding and extrusion compositions, film sheets, fibers, textiles, papers, surface or coating compositions, impregnating agents, solid forms, rubbers, and the like. The invention may also be applied especially to wet-spun and dry-spun fibers, such as acrylic fiber, polyvinyl alcohol fiber and viscose rayon, and melt-spun fibers, such as nylon, polyester fiber, and other fibers, such as di- or triacetate cellulose fibers. The invention is also applicable to plastics and films, by adding said inorganic compounds prior to molding. Another noteworthy feature of this invention is that when, for example, fibers produced by the process are ignited, no toxic gas is generated before the fire is extinguished.

A laminated pane includes first and second panes, a layer stack arranged therebetween including a first thermoplastic intermediate layer, a separating layer, a photopolymer layer with at least one holographic element, a carrier layer, and a second thermoplastic intermediate layer, wherein the photopolymer layer has a thickness of 5 μm to 50 μm, the carrier layer contains polyethylene terephthalate (PET), polyethylene (PE), polymethyl methacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinyl chloride (PVC), and / or cellulose triacetate (TAC) and has a thickness of 20 μm to 100 μm, wherein the carrier layer is arranged directly adjacent the photopolymer layer, and the separating layer contains polyethylene (PE), polyvinyl chloride (PVC), and / or polymethyl methacrylate (PMMA) and has a thickness of 10 μm to 300 μm.

The invention provides a homogeneous preparation method of cellulose triacetate, which comprises the following steps: S1, dissolving cellulose in a eutectic solvent under the condition of supercritical carbon dioxide to obtain a homogeneous cellulose solution; s2, adding acetic anhydride and a dehydrating agent into the homogeneous cellulose solution, and carrying out esterification reaction under the condition of supercritical carbon dioxide; and S3, after the reaction is finished, precipitating the reaction liquid, and purifying and drying the obtained precipitate to obtain the cellulose triacetate. The method has the characteristics of uniform reaction, high efficiency and environmental protection.

The invention relates to an ultra-thin iodine polaroid, a preparation method and an ultra-thin circular polaroid, and the ultra-thin iodine polaroid comprises polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol and iodine and / or potassium iodide dispersed in the polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol in a dissolving manner. According to the invention, iodine and / or potassium iodide are / is dissolved and dispersed in polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol, and the ultrathin iodine polarizer is finally obtained through the steps of material mixing, distillation, extrusion, coating, curtain coating, one-way calendering, stretching and drying. On the first aspect, iodine and / or potassium iodide are dispersed more uniformly by adopting a dissolving and dispersing mode, so that the degree of polarization and the light transmittance of each part of the polaroid are guaranteed; on the second aspect, the polaroid does not need to be clamped and fixed by a cellulose triacetate film, so that the thickness of the polaroid can be further reduced; and thirdly, a retarder is compounded on the ultra-thin iodine polaroid, so that the purpose of manufacturing the ultra-thin circular polaroid is achieved.

This invention discloses a high-adhesion-strength TAC film and its preparation method, belonging to the field of polymer protective film technology. The preparation method includes the following steps: mixing cellulose triacetate, a stabilizer, a plasticizer, a UV stabilizer, and a solvent, dissolving them under heating and stirring conditions to form a homogeneous TAC solution, and obtaining a TAC base film through casting and drying; subjecting the TAC base film to low-temperature plasma treatment, and then drying it at a temperature of 80-100℃ to obtain a high-adhesion-strength TAC film; the stabilizer is phenylboronic acid-terminated cellulose acetate. This invention provides a high-adhesion-strength TAC film and its preparation method. Through the synergistic effect of low-temperature plasma surface activation and phenylboronic acid-terminated cellulose acetate stabilizer, the surface adhesion performance of the TAC film is significantly improved while effectively solving the problem of decreased mechanical properties caused by plasma treatment, achieving a balance between high adhesion strength and excellent mechanical properties.

The invention discloses a gypsum product which comprises a gypsum body. The gypsum body is formed by gypsum slurry. The gypsum slurry comprises water, gypsum powder and a reinforcing agent. The reinforcing agent comprises a polymer component and a silicon compound component. The polymer component comprises cellulose triacetate, a polyester material and iodized polyvinyl alcohol. The iodinated polyvinyl alcohol is formed by polyvinyl alcohol and an iodine source. The gypsum product prepared by using the reinforcing agent has high compressive strength.

A filter rod for flue gas filtration is disclosed, the filter rod being made of bulky yarn; the bulky yarn comprises a central, high-shrinkage core yarn and a surrounding, low-shrinkage outer yarn, the outer yarn forming multiple sequentially connected loops along the core yarn. The core yarn is made from any one or a mixture of polylactic acid, polypropylene carbonate, polylactic-co-hydroxyacetic acid copolymer, polybutylene adipate / terephthalate, polycaprolactone, poly-β-hydroxybutyrate, polyhydroxyalkanoate, and polybutylene succinate. The outer yarn is made from any one or a mixture of cellulose fiber, cellulose monoacetate fiber, cellulose diacetate fiber, cellulose triacetate fiber, alginate fiber, chitosan fiber, milk silk fiber, soybean fiber, and silk fiber. This design not only replaces diacetate fiber in the application of tobacco filter rods but also frees up production capacity.

A water-resistant lens and eyeglasses. The water-resistant lens comprises a substrate layer, an adhesive, and a polarizing lens (500). The substrate layer is made of a polycarbonate film material, the adhesive is a photocurable resin adhesive, and the adhesive is provided between the substrate layer and the polarizing lens (500), such that the substrate layer and the polarizing lens (500) are bonded. In the water-resistant lens, the polycarbonate film material is used as a substrate to replace a traditional cellulose triacetate substrate, and the photocurable resin adhesive is used to replace a traditional water-based adhesive, thereby improving the problem of poor water resistance of traditional multi-layer laminated polarizing eyeglasses.

The invention relates to the technical field of polarizers, and discloses a pretreatment method of dichroic dye, a dye-based polarizer and a preparation method of the dichroic dye, and the pretreatment method comprises the following steps: filtering the dichroic dye through a mesh screen, mixing and stirring the dichroic dye with pure water, adding a boric acid solution to adjust the pH value to weak acidity, separating out the dye and dissolving impurities in water, and drying to obtain the dichroic dye. And filtering with filter cloth, and carrying out forced air drying to obtain a purified dichroism dye finished product. The method takes water as a medium in the whole process, does not need an organic solvent and is green and environment-friendly. When the purified dichroism dye finished product is used for preparing the polaroid, swelling, dip dyeing, stretching in a boric acid solution and drying are carried out on a PVA film to prepare a polaroid, then the polaroid is compounded with an anti-ultraviolet cellulose triacetate film, and gluing is carried out, so that the prepared dye system polaroid has high degree of polarization, high transmittance and excellent weather resistance; the optical performance change rate is less than or equal to 5% after dry heat and damp heat tests, no depolarization phenomenon exists, and the strict application requirements of high-end vehicle-mounted display and the like are perfectly met.