66results about How to "Reduce resin content" patented technology

The heat storage capacity of natural cellulosic products is increased by injecting nucleating products and / or heat storing material into unfilled cells thereby increasing the amount of material that can undergo phase change for transferring latent heat.

The invention relates to the technical field of pulping and papermaking, in particular to a method for pulping through needlebush pre-conditioning refiner chemical alkaline peroxide mechanical pulp (P-RC APMP), wherein the first period of extrusion processing of needlebush pieces after being steamed is subjected, the first period of chemical processing is subjected after chemical liquid A is added, the chemical liquid A contains sodium dodecyl benzene sulfonate and octyl phenol polyoxyethylene ether (10), the second period of extrusion processing is subjected, the second period of chemical processing is subjected by adding chemical liquid B after the second period of extrusion, the chemical liquid B contains the sodium dodecyl benzene sulfonate and the octyl phenol polyoxyethylene ether (10), the first period of defibrination is subjected after processing and stops, and then the second period of defibrination and eliminate hidden processing are subjected to obtain needlebush P-RC APMP paper pulp. The method for pulping through needlebush P-RC APMP strengthens chemical action of impregnation liquid and dissolution of reactants, softens fiber materials, reduces subsequent pulping energy consumption, improves fiber quality, increases pulp whiteness, reduces pulp resin content, and reduces resin obstacle.

The invention discloses a reaction device for continuous synthesis of 2-mercaptobenzothiazole. The reaction device comprises a raw material preheater, a micromixer, multistage reaction kettles and a stripping tower which are connected in series and sequentially complete the preheating, mixing, reacting and phase separating processes of raw materials; the raw materials comprise aniline, carbon disulfide and sulphur which are heated to the respective initial temperatures in the preheating device and then are subjected to insulation mixing in the micromixer, a raw material mixture sequentially enters from the bottom of the multi-stage reaction kettles which are connected in series, leaves from the tops of the multi-stage reaction kettles, and is subjected to multi-stage reaction to generate the 2-mercaptobenzothiazole; and the top of the last-stage reaction kettle communicates with the stripping tower, and the stripping tower is used for separating the reacted materials into tail gas anda 2-mercaptobenzothiazole coarse product. Continuous production can be achieved by using the reaction device, the yield of the 2-mercaptobenzothiazole reaches 92% or above, the resin content is less than 4%, the production efficiency is high, and the product stability is good.

The invention discloses a method for grading quartz sand by clamping the quartz sand with a glass-fiber reinforced plastic quartz-sand clamping tube through adopting the wet process. The method comprises the following steps of: taking 15 parts by weight of accessory in a first group, wherein the accessory in the first group is quartz sand with the particle size of 0.6-0.9mm; taking 29 parts by weight of accessory in a second group, wherein the accessory in the second group is quartz sand with the particle size of 0.5-0.56mm; taking 25 parts by weight of accessory in a third group, wherein the accessory in the third group is quartz sand with the particle size of 0.45mm; taking 21 parts by weight of accessory in a fourth group, wherein the accessory in the fourth group is quartz sand with the particle size of 0.355mm; taking 8 parts by weight of accessory in a fifth group, wherein the accessory in the fifth group is quartz sand with the particle size of 0.3mm; taking 2 parts by weight of accessory in a sixth group, wherein the accessory in the sixth group is quartz sand with the particle size of 0.25mm; and mixing the six groups of accessories uniformly according to the corresponding parts. The quartz-sand clamping layer of a product has low content of resin and is highly compact, thus the stable quality of the product is guaranteed, and the cost of the product is lowered.

The invention provides a cured resin for artificial quartz and the artificial quartz prepared by the cured resin, which relate to the cured resin for the artificial quartz and the artificial quartz prepared by the cured resin, in particular to a method for preparing the artificial quartz which has easy formability and appearance similar to marmoreal. The cured resin for the artificial quartz is in liquid state at normal temperature, and is prepared by a condensation reaction of polylol, saturated acid and unsaturated acid; an alcohol acid reaction system comprises the following components in percentage by weight: 37 to 47 percent of the polylol, 35 to 40 percent of saturated acid or estolide, and 18 to 23 percent of unsaturated acid or estolide, wherein 30 to 45 percent of cross-linking agent is added into the alcohol acid reaction system; the saturated acid or estolide is phthalic acid or phthalic anhydride; and the unsaturated acid or estolide is maleic acid or maleic anhydride. The cured resin for the artificial quartz can be used for preparing the artificial quartz, has sufficient curing, small internal stress inside the product and performance capable of reaching maximum.

The invention discloses a high-wettability epoxy resin composite material and an application. The high-wettability epoxy resin composite material is prepared from the raw materials including epoxy resin, a curing agent, an accelerant and an antifoaming agent. Based on the antifoaming effect of the antifoaming agent on the epoxy resin and a perfect wetting effect on carbon fiber when the proportion of the antifoaming agent in the epoxy resin system is over 1% and with the supplemented synergistic effect between appropriate curing agent and accelerant and excellent mechanical properties of the epoxy resin, the composite material shows good wetting property on the carbon fiber in use, and a carbon fiber prepreg with low resin content can be prepared; and moreover, the preparation method of the carbon fiber prepreg with low resin content has the advantages of easiness, high efficiency, low cost and huge potential of industrial production while the product has the characteristics of low porosity, high strength and the like.

The invention provides a cured resin for artificial quartz and the artificial quartz prepared by the cured resin, which relate to the cured resin for the artificial quartz and the artificial quartz prepared by the cured resin, in particular to a method for preparing the artificial quartz which has easy formability and appearance similar to marmoreal. The cured resin for the artificial quartz is in liquid state at normal temperature, and is prepared by a condensation reaction of polylol, saturated acid and unsaturated acid; an alcohol acid reaction system comprises the following components in percentage by weight: 37 to 47 percent of the polylol, 35 to 40 percent of saturated acid or estolide, and 18 to 23 percent of unsaturated acid or estolide, wherein 30 to 45 percent of cross-linking agent is added into the alcohol acid reaction system; the saturated acid or estolide is phthalic acid or phthalic anhydride; and the unsaturated acid or estolide is maleic acid or maleic anhydride. Thecured resin for the artificial quartz can be used for preparing the artificial quartz, has sufficient curing, small internal stress inside the product and performance capable of reaching maximum.

The invention discloses a solvent and method for removing resin from lignite wax by virtue of a crystallization process, belonging to methods for removing resin from lignite wax. The method comprises the following steps: (1) heating and dissolving, namely putting lignite wax particles into a crystallization kettle, injecting a cyclohexane solvent or an acetic ester solvent according to a material-liquid mass ratio of 1:(5-50), stirring, heating the crystallization kettle by using steam, and controlling the pressure of the container to be 1.0-5.0 MPa until the lignite wax particles are dissolved; (2) cooling and crystallizing, namely after the lignite wax particles are dissolved, stopping heating, performing water cooling on the crystallization kettle until the temperature is between -10 and 20 DEG C, and keeping the low temperature for crystallization for 10-50 minutes; (3) filtering and drying, namely after crystallization, filtering to separate filter residues and filtrate, performing reduced pressure drying on the filter residues at 40 DEG C in a vacuum drying machine, and then performing press forming; and (4) recovering the filtrate, namely recovering by virtue of rectification, and separating the solvent and resin for recycling. The solvent adopted in the method disclosed by the invention is cyclohexane or acetic ester, and the two solvents are nontoxic, cause small harm to human bodies, are not corrosive, can be recycled, are harmless to the ecological environment and are environment-friendly.

The invention provides an unmanned aerial vehicle body prepared from a composite material, and a preparation method thereof. The unmanned aerial vehicle body comprises an airframe and a wing group, wherein the wing group comprises a main wing and a tail wing arranged on two sides of the airframe respectively; two sides of the main wing are connected with a first or second side wing; materials of the airframe and the wing group are of a laminated structure; the material of the airframe comprises first carbon fiber cloth, second carbon fiber cloth, first polyvinyl chloride cloth and third carbon fiber cloth which are sequentially connected in a laminated manner; materials of the main wing and the first and second side wings respectively comprise first carbon fiber cloth, first polyvinyl chloride cloth and second carbon fiber cloth which are sequentially connected in a laminated manner; a material of the tail wing comprises first carbon fiber cloth, first polyvinyl chloride cloth and second carbon fiber cloth which are sequentially connected in a laminated manner. The composite material used for the airframe and the wings of the unmanned aerial vehicle body is light, the tensile strength and tear resistance of the materials of the airframe and the wings are improved, and the structural strength of the unmanned aerial vehicle can be ensured.

The invention relates to a new production method for knitting a high-strength rope from high-strength polyethylene fibers, which is superior to the current production method for ropes. The method of the invention comprises the following concrete steps: selecting high-strength large-tow polyethylene fibers; by homogenizing tension by a fiber tension device, twisting and stranding multiple tows of fibers; homogenizing the tension of multiple strands of twisted fibers according to the specification requirements of the rope, combining the multiple strands of twisted fibers, and then homogenizing the tension of the combined single-strand tows; knitting 12 strands of ropes by a knitting machine; and coating resin on the surface, drying and shaping to form a high-strength polyethylene fiber rope. The rope produced by the invention has the advantages of convenient use, high strength, corrosion resistance, wear resistance, excellent toughness and flexibility, long service life and the like, and can be widely applied to the fields of industries, national defense, physical education, oceans and the like.

The invention relates to the technical field of APMP (Alkaline Peroxide Mechanical Pulp) pulping, in particular to a method for the APMP pulping of a needlebush. The method comprises steps as follows: extruding a steamed needlebush piece at the first section; adding chemical medicine liquid A to the extruded piece for chemical processing at the first section, wherein the chemical medicine liquid A includes sodium dodecyl benzene sulfonate and octyl phenol polyoxyethylene ether; extruding at the second section after the first chemical processing; chemically processing after the extruding at the second section, wherein the chemical medicine liquid B includes sodium dodecyl benzene sulfonate and octyl phenol polyoxyethylene ether; then washing after the processing; grinding into pulp; and depositing so as to obtain the needlebush APMP pulping. According to the method, a chemical effect of dipping liquid is improved, a reaction product is deposited, a fiber material is softened, so that energy consumption in follow-up pulping is reduced, quality of the fiber is greatly improved, whiteness of the pulp is improved, content of resin of paper pulp is reduced, and a resin barrier is decreased.

Woven fabric of continuous, untwisted carbon yarn is impregnated with a modified cyanate ester resin or oligomer, preferably at least about 10% by weight of the combined weight of the cured resin and fabric. The cured fabric may be employed as a wet friction material suitable for use in transmission fluid couplings, and the like. The cured composite sheet can be backed with an adhesive film or liquid bonding paste for ease of bonding to one side of the metal portion of the transmission or clutch. Where thicker material is required, two or more cured composite sheets can be bonded together for applications such as transmissions.