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39results about How to "Does not reduce viscosity" patented technology

Method for producing regenerative heavy denier profiled polyester staple fibres

The invention relates to a method for producing regenerative heavy denier profiled polyester staple fibres. The method comprises the following main procedures: selecting high-quality regenerative polyester bottle chips and spinning the bottle chips to form fibres with profiled sections through drying, melting spinning, cooling, drawing and setting. The method has the following main characteristics: A) after being dried, the moisture contents of the regenerative polyester bottle chips are below 80PPM; B) the melting temperature is controlled between 270 DEG C and 285 DEG C and the spin beam temperature is controlled between 275 DEG C and 278 DEG C; and C) a mist and recirculating air dual-purpose cooling device is adopted for cooling, the mist spray speed is 3.8-4.0m/s and the water temperature is not more than 30 DEG C. The method has the following positive effects: by adopting the cooling method and device combining mist spray cooling and recirculating air cooling for the fibres which are extruded, melted and spouted, the good setting property of the profiled sections of the fibres is ensured and the problem that the sections of the fibres tend to be round due to surface tension existing when the polymer melt is extruded from the spinneret orifice is solved, so that the fibres have multidimensional reflecting effects as the diamond shaped mirrors.
Owner:广东秋盛资源股份有限公司

Three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and preparation method thereof

The invention discloses a three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and a preparation method thereof. The preparation method comprises the following steps: (1) stabilizing aluminum oxide-zirconium oxide composite sol; (2) performing soaking, namely performing vacuum soaking on a three-dimensional silicon carbide fiber prefabricated part into the aluminum oxide-zirconium oxide composite sol; (3) drying the soaked three-dimensional silicon carbide fiber prefabricated part; (4) performing thermal treatment; (5) repeating the soaking-drying-thermal treatment process of steps (2) to (4) till the weight of a three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material intermittent is increased by less than 1% when being compared with that of a former soaking-drying-thermal treatment process, thereby obtaining the three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxidecomposite material. The three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material disclosed by the invention has the advantages of being good in high temperature resistance and oxidation resistance, excellent in mechanical property, and the like.
Owner:NAT UNIV OF DEFENSE TECH

Three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material and preparation method thereof

The invention discloses a preparation method of a three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The preparation method ofthe three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material comprises the following steps of (1) stabilizing SiO2-ZrO2 composite sol;(2) impregnating three-dimensional silicon carbide fiber prefabricated members into the stabilized SiO2-ZrO2 composite sol; (3) drying the impregnated three-dimensional silicon carbide fiber prefabricated members; (4) performing thermal treatment; (5) repeating the impregnation-drying-thermal treatment process in the steps of (2) to (4) until the weight gain rate of a three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material intermediate in a current impregnation-drying-thermal treatment process relative to a previous impregnation-drying-thermal treatment process is smaller than 1% to obtain the three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The prepared three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material has the advantages of being high in high-temperature resistance and antioxidant and mechanical performance and the like.
Owner:NAT UNIV OF DEFENSE TECH

Three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material and preparation method thereof

The invention discloses a preparation method of a three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The preparation method of the three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material comprises the following steps of (1) stabilizing SiO2-ZrO2 composite sol; (2) impregnatingthree-dimensional carbon fiber prefabricated members into the stabilized SiO2-ZrO2 composite sol; (3) drying the impregnated three-dimensional carbon fiber prefabricated members; (4) performing thermal treatment; (5) repeating the impregnation-drying-thermal treatment process in the steps of (2) to (4) until the weight gain rate of a three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material intermediate in a current impregnation-drying-thermal treatment process relative to a previous impregnation-drying-thermal treatment process is smaller than 1% to obtain the three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The prepared three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material has the advantages of being high in high-temperature resistance and antioxidant and mechanical performance and the like.
Owner:NAT UNIV OF DEFENSE TECH

Worn medical adhesive tape pull-parting device

The invention relates to a pull-parting device, in particular to a worn medical adhesive tape pull-parting device. For solving the technical problem, the worn medical adhesive tape pull-parting devicesimple in operation and making the stickiness of an adhesive tape not prone to reduction. According to the technical scheme, the worn medical adhesive tape pull-parting device comprises a columnar box body, a cover, a first bearing seat, a rotary shaft, a second bearing seat, a rotary rod and the like. The top of the columnar box body is provided with the cover, the cover is matched with the columnar box body, the middle of the bottom of the columnar box body is provided with the first bearing seat in an embedded way, and the rotary shat is connected in the first bearing seat and is providedwith a cavity. Under the effect of the first bearing seat, the rotary shaft can rotate with an adhesive tape so that a medical worker can better pull out the adhesive tape and pull the adhesive tape apart through a toothed blade, the operation is simple, and the stickiness of the adhesive tape is not reduced; the adhesive tape can be compressed through a compressing mechanism, the phenomenon is avoided that the adhesive tape rotates when the toothed blade pulls the adhesive tape apart, and accordingly the tooth blade can better pull the adhesive tape apart.
Owner:THE AFFILIATED HOSPITAL OF QINGDAO UNIV

Three-dimensional carbon fiber preform enhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material and preparation method thereof

The invention discloses a three-dimensional carbon fiber preform enhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material and a preparation method thereof. The composite materialcomprises a three-dimensional carbon fiber preform and yttrium oxide-aluminum oxide complex-phase ceramic, in the yttrium oxide-aluminum oxide complex-phase ceramic, the molar content of Al2O3 is 5%-95%, pores of a three-dimensional carbon fiber preform are uniformly filled with the yttrium oxide-aluminum oxide complex-phase ceramic, and the porosity of the three-dimensional carbon fiber preformenhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material is 10%-15%. The preparation method comprises the following steps; (1) preparing yttrium oxide-aluminum oxide composite sol; (2) carrying out dipping; (3) drying; (4) carrying out heat treatment; and (5) repeating a dipping-drying-heat treatment process in the step (2)-step (4). The composite material has the advantagesof low porosity, high compactness, high temperature resistance, oxidation resistance, excellent mechanical property and the like. The preparation method is high in preparation efficiency, and the compactness and mechanical property of the prepared composite material are improved remarkably.
Owner:NAT UNIV OF DEFENSE TECH

Method for producing regenerative heavy denier profiled polyester staple fibres

ActiveCN102094250BSolve the problem of aqueous high viscosity degradationHigh strengthFilament/thread formingMonocomponent polyesters artificial filamentPolyesterFiber
The invention relates to a method for producing regenerative heavy denier profiled polyester staple fibres. The method comprises the following main procedures: selecting high-quality regenerative polyester bottle chips and spinning the bottle chips to form fibres with profiled sections through drying, melting spinning, cooling, drawing and setting. The method has the following main characteristics: A) after being dried, the moisture contents of the regenerative polyester bottle chips are below 80PPM; B) the melting temperature is controlled between 270 DEG C and 285 DEG C and the spin beam temperature is controlled between 275 DEG C and 278 DEG C; and C) a mist and recirculating air dual-purpose cooling device is adopted for cooling, the mist spray speed is 3.8-4.0m / s and the water temperature is not more than 30 DEG C. The method has the following positive effects: by adopting the cooling method and device combining mist spray cooling and recirculating air cooling for the fibres which are extruded, melted and spouted, the good setting property of the profiled sections of the fibres is ensured and the problem that the sections of the fibres tend to be round due to surface tension existing when the polymer melt is extruded from the spinneret orifice is solved, so that the fibres have multidimensional reflecting effects as the diamond shaped mirrors.
Owner:广东秋盛资源股份有限公司

Three-dimensional carbon fiber reinforced silica-zirconia composite ceramic composite material and preparation method thereof

The invention discloses a preparation method of a three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The preparation method of the three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material comprises the following steps of (1) stabilizing SiO2-ZrO2 composite sol; (2) impregnatingthree-dimensional carbon fiber prefabricated members into the stabilized SiO2-ZrO2 composite sol; (3) drying the impregnated three-dimensional carbon fiber prefabricated members; (4) performing thermal treatment; (5) repeating the impregnation-drying-thermal treatment process in the steps of (2) to (4) until the weight gain rate of a three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material intermediate in a current impregnation-drying-thermal treatment process relative to a previous impregnation-drying-thermal treatment process is smaller than 1% to obtain the three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The prepared three-dimensional carbon fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material has the advantages of being high in high-temperature resistance and antioxidant and mechanical performance and the like.
Owner:NAT UNIV OF DEFENSE TECH

Defoaming agent suitable for curtain coating of mirror back coating, preparation method of defoaming agent and mirror back coating

The invention relates to the technical field of defoaming agents, and particularly discloses a defoaming agent suitable for curtain coating of a mirror back coating, a preparation method of the defoaming agent and the mirror back coating. The defoaming agent suitable for curtain coating of the mirror back coating comprises the following raw materials: a fluorine-containing acrylic monomer, a hydroxyl-containing acrylic monomer, an acrylic monomer without fluorine and hydroxyl, xylene, butyl acetate, an initiator and a silane coupling agent, wherein the initiator is one or more of dicumyl peroxide, benzoyl peroxide and azodiisobutyronitrile; the defoaming agent prepared in the invention has high defoaming performance and foam inhibition performance, hydroxyl in the hydroxyl-containing acrylic monomer is crosslinked with amino in the coating, CASS of a mirror back coating product is also protected to a certain extent, and meanwhile, the initiator is compounded to ensure that the prepared polymer does not cause a broken screen phenomenon, so that the defoaming agent has high defoaming performance and foam inhibition performance. And the coating has good compatibility with a mirror back coating, and meets the market demand.
Owner:TIANJIN CITY XINLIHUA COLOR MATERIAL
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