33results about How to "Improve beating degree" patented technology

The invention discloses a method for producing latex paper by using a circular-net multi-cylinder paper machine. 50 to 60 percent of bleached sulfate soft wood pulp, 35 to 45 percent of non-bleached sulfate soft wood pulp and 5 percent of manmade fiber are adopted, and the following technology is used at the same time so as to make the product better: defibrinating by using a previous-low-concentration fiberizer and a rear-middle-concentration fiberizer so that the beating degree is higher and the length of the fiber can be retained to the maximum extent, and the body paper has higher tensilestrength and flexibility and is hard to break during use; besides the two different soft wood pulps, a certain amount of manmade fiber is added into the fiber raw material, so that the strength and the anti-abrasion performance of latex paper are enhanced; the body paper subjected to dipping treatment according to an optimized latex formula has higher strength and water, oil and high temperature resistance performance; a specific surface coating and back coating mode is performed on the dipped body paper, so the tensile strength, the bending resistance and the liquid resistance of the finished paper are enhanced; meanwhile, the latex paper is softer and durable, and higher in the surface strength.

The invention discloses a sterile tissue and a production process thereof, and belongs to the technical field of tissue production. The tissue is prepared from, by weight, 20-60% of bleached sulfate softwood pulp, 30-70% of CPMP and 0-10% of broken paper pulp. According to the method, by adopting an appropriate principle and ratio, wet strength agents with low organic chlorine, biodegradable non-toxic fungicides and FDA-authenticated coatings, adopting forming equipment with a low vertical-horizontal tension ratio, a drying and sterilization process at the temperature higher than 40 DEG C andsafe non-toxic chemicals, and combining appropriate pressing printing processes, the produced tissue has the advantages of being low in quantification, low in vertical-horizontal tension ratio, sterile, environmentally friendly and high in water absorption performance.

The invention discloses a preparation method of an acrylic board veneer protection base paper; the following steps are carried out: taking 3-10 parts of cellulase, 1-8 parts of pectinase and 3-10 parts of xylanase in parts by weight , 0.1-0.8 part of alkanolamide, 0.1-0.6 part of Span-600.1-0.6 part, 75.7-88.8 part of water to prepare composite biological enzyme agent; add 1-5 parts of mixed pulp plate in pulper by weight, add 95- 99 parts of water, then add a compound biological enzyme agent of 100ppm-300ppm relative to the dry pulp weight, decompose for 5-30 minutes, and make a mixed pulp; send the mixed pulp into a refiner for refining, and the beating concentration is 1% ‑4%, refining to a beating degree of 20‑45°SR; the pulp is sequentially diluted, netted, pressed, dried and curled to obtain the finished product. The invention improves the beating degree of the pulp, shortens the refining time, reduces energy consumption, reduces pollution, and improves the specific gravity of the fiber form in the pulp by adding the compound biological enzyme agent with an optimized ratio in the pulping process of the base paper, so that the base paper The volume index of paper has been significantly improved.

The invention relates to the technical field of special synthesized fiber manufacturing, and in particular to a method for washing meta-aramid fibrid. The method comprises the following steps: performing continuous washing for six stages in sequence, from the sixth time of washing, performing countercurrent washing with pure water, recycling separated washing water for a former washing stage, and adding acid into washing water of the fourth stage to the first stage so as to acidify the fiber in an acid washing solution, so that the caked surface of the fiber is loosed, the infiltration rate of the washing water is increased, and diffusion dissolution of Cl- and chlorizated salts in the washing water in the fiber is accelerated; meanwhile, oligomers in the acid washing solution can be subjected to acidolysis and can be decomposed into acid hydrolysate which can be dissolved in the washing water, so that the product quality can be improved. By adopting the method, the content of Cl- ions of a fibrid product obtained by using the method can be less than or equal to 50PPm, the original beating degree of the fibrid product can be 35-50 DEG SR, the thermal shrinkage rate of the fibrid product at 240 DEG C is less than or equal to 20%, and the washing water equivalent of the fibrid product on a dry basis Kg is less than or equal to 40Kg.

High-strength, water-resistant and environment-friendly kraft paper is characterized by comprising a printing layer, a waterproof layer, a sandwich layer, a lining layer and a bottom layer, wherein paper pulp for the printing layer is 100% wood paper pulp, the waterproof layer adopts domestic waste paper pulp added with 2%-5% of a waterproof agent, paper pulp for the sandwich layer is 100% domestic waste paper pulp, the liner layer adopts mixed paper pulp of non-plant fibers and domestic waste paper pulp, and paper pulp for the bottom layer is 100% imported waste paper pulp. The preparation method comprises steps as follows: (1) preparation of ingredients; (2) pulping; (3), grit removal; (4) fiber sieving; (5) pulp refining; (6), layered water filtering and papermaking; (7), pre-drying; (8) coating; (9) pressing; (10) drying; (11) paper formation. The high-strength, water-resistant and environment-friendly kraft paper has the benefits as follows: the kraft paper has advantages of high strength, water resistance and easiness in printing, meanwhile, the cost of kraft paper is reduced by about 20%, and greater benefits are brought to enterprises.

The invention provides a production method of chemi-mechanical pulp, which comprises the following steps: first pulping pulpwood and defibering and bleaching, thus obtaining defibered pulp; and then screening and thickening the defibered pulp, and conducting secondary thick grinding, thus obtaining single-fiberized chemi-mechanical pulp and directly delivering the single-fiber chemi-mechanical pulp to a papermaking shop. The production method of chemi-mechanical pulp reduces lumps in the pulp, effectively reduces power consumption during secondary thick grinding, reduces abrasion of a mill stone and improves the service life thereof, also obviously improves the pulping effect of the pulp, and leads to high single-fiberization rate and higher pulping degree of the pulp; and an adjusting tower is adopted in the production method for storing and thickening the pulp, and simultaneously the pulp can be further leached, therefore, the concentration of the pulp can be better controlled and can be even in the process, thus facilitating the follow-up working procedures.

The invention discloses a forming method for a multi-element alloy abrasive disc with coarse particles on the surface. The forming method comprises the steps that metal particles and non-metal particles of different granularity are added into an appropriate adhesive according to different proportions to prepare a rack to be adhered to the surface of a casting mold cavity; and then metal liquids are poured at a high temperature, multi-element alloy particles and substrate metal are fused and permeated under the high-temperature action of the metal liquids, so that a hard multi-element alloy layer with relatively high impact resistance and high wear resistance is prepared on the surfaces of grinding teeth. According to the forming method, the multi-element alloy particles are fused and permeated with the substrate metal so that the hard multi-element alloy layer with the relatively high impact resistance and the high wear resistance can be prepared on the surfaces of the grinding teeth,and the surface of the abrasive disc rack is provided with certain coarse grains and micro-pores; and due to the fact that the surface of the abrasive disc rack is provided with the certain coarse grains and the micro-pores, in the pulping process, the friction force of the coarse grains and the micro-pores of the rack on fibers can be increased, and the fibrillation of the fibers and binding force between the fiber can be promoted.

The invention discloses a method for preparing a nano-amphoteric polyacrylamide accessory ingredient used for reclaiming sediment in paper making waste. The method comprises the steps as follows: Span80, Tween60, normal butyl alcohol and isooctane are added into a four-opening reaction bulb and are beaten for emulsification. AM, MA and DMDAAC monomers are mixed to get solution; a reducer which issodium bisulfite is added; subsequently, the solution is dropped into the four-opening reaction bulb; when the solution is heated to the initiation temperature, potassium persulfate is dropped; polymerization is initiated under the protection of N2. On completion of the reaction, heating, supply of N2 and beating are stopped; micro-emulsion is poured into an excessive dose of acetone for emulsionbreaking and settlement; the solution is filtered, washed with acetone and dried, thus getting the product; the product is preserved in a sealed container. The method solves the problems of the interference of small quantity of fiber remaining in the sediment of paper making waste, poor paper strength, anion waste on papermaking wet ends. By adopting the method, the sediment can be reclaimed and used in production as a paper making raw material. In addition, the method eliminates the secondary pollution caused by the sediment resulting from the traditional paper making waste processing technology.