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

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 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.