38results about How to "Low tightness" patented technology

The invention relates to an anti-flaming non-woven paper and a preparation method thereof. The anti-flaming non-woven paper comprises the following raw materials by weight part: 70-99 parts of fiber slurry and 1-30 parts of adhesives, wherein the fiber slurry comprises a wood pulp fiber and a functional fiber; the quantity of the wood pulp fiber is 0%-95%; the quantity of the functional fiber is 5%-100%; and the anti-flaming non-woven paper is prepared by processing the functional fiber, the wood pulp fiber and the adhesives or mixing and processing the functional fiber and the wood pulp fiber and then using an adhesive machine for coating inside. A natural stripe appears on the surface of the anti-flaming non-woven paper provided by the invention; the appearance is beautiful; no additional treatment is required; and meanwhile, the anti-flaming non-woven paper product does not contract during a processing process and is free from moist feel; paper uncovering is complete; the flexibility of the paper is excellent; the paper is not burned under the flame and is free from flame; and the paper is only carbonized at the temperature above 400 DEG C, so that the product has excellent anti-flaming property.

The invention belongs to the field of electrolytic capacitor papers, in particular to a coating-enhanced low-density carbonization-free solid-state electrolytic capacitor paper and a preparation method thereof. The raw materials of the electrolytic capacitor paper comprise hemp pulp and chemical fibers; a beating degree of the hemp pulp is 10-30 degree SR, and a wet weight is 10-40 g; the length of the chemical fibers is 1.5-15 mm, and the fineness of the chemical fibers is 0.1-3 dtex; according to a dry weight percentage, the hemp pulp is 10-80% and the chemical fibers are 20-90%; and the surface of the electrolytic capacitor paper is coated with an enhancement layer through spraying or dipping, and the coating amount after coating is 1-10% of an absolute dry weight of the paper. The paper is coated, so that the paper strength can be further enhanced, and a smooth production of capacitors can be ensured.

The invention relates to a preparation method of a sound-absorbing flame-retardant fiber composite material. The method comprises the following steps of pulp selection, pulping, pulp preparation, papermaking, drying and impregnation. Pulp of the sound-absorbing flame-retardant fiber composite material comprises 30-70% of bleached softwood pulp, 20-40% of glass fibers and 10-30% of hardwood pulp, wherein the beating degree of the softwood is 18-30 degrees SR, and the beating degree of the hardwood pulp is 13-25 degrees SR. Then, 0.5-2% of a plasticizer, 1-3% of an adhesive and 3-5% of a flame retardant are adopted for impregnation. According to the method, various measures are combined to prepare the fiber composite material which is light in texture, good in air permeability and excellentin sound absorption performance and flame retardance performance, the application field of the glass fibers is widened, and the method has important significance in the development and cost reductionof novel building decoration materials.

The invention discloses a translucent-color-reduced eight-harness double-brocade woven label and a knitting method thereof. The woven label is a light-colored 'ground' and a deep-colored pattern and composed of one warp system and 3-12 weft systems; the weft system is based on the 'ground' and comprises a 'ground' organization layer, a lining organization layer and a netting shuttle organization layer. The 'ground' organization layer is an 8/5 or 8/3 weft face organization; the netting shuttle organization layer is an amplified organization of the 'ground' organization layer; a novel lining organization is adopted for the lining organization layer, and point loosening processing is conducted on netting shuttle points. The translucent color phenomenon of the eight-harness double-cotton multi-color woven label is reduced through a series of methods of selection of the lining shuttle, improvement of the lining shuttle organization, arrangement of the color shuttle from the light color to the deep color, selection of the netting shuttle mode, control over tension of warp and weft in the knitting process and the like.

The invention discloses a preparation method for improving the waterproof performance of a paper cup. The preparation method includes the following steps of mixing locust bean gum and sweet potato starch with water for pregelatinization, adding polyethylene glycol 4000 for uniform mixing, adding polyether amine D230 and tri-(dimethylamino methyl)phenol for uniform mixing, conducting vacuum degassing, adjusting the temperature for stirring, and conducting cooling, drying and smashing to obtain a first material; mixing straw stalks with locust tree bark, conducting disc grinding to obtain pulp,adjusting the concentration of the pulp, adding the first material, and stirring the mixture to obtain a second material; adding methyl silicone oil, paraffin and cocamidopropyl betaine into the second material for uniform mixing, then adding montmorillonite, trimethylethoxysilane, organic-silicone polymerized emulsion, bentonite and silicon carbide powder for uniform mixing, pumping the mixture into a die for paper pulp molding, making the mixture subjected to adsorption forming and then dried into raw paper, and conducting rolling, hot press, cropping and bonding forming to obtain the waterproof paper cup.

The invention discloses a preparation method of a plant fiber/glass fiber-based special thin-sheet substrate. The method comprises the steps that a commercial chemical pulp board is pretreated, fiberis dispersed, base paper is manufactured with pulp, a maceration extract is prepared, and the base paper is macerated and dried. The plant fiber/glass fiber-based special thin-sheet substrate preparedby combining various measures has the advantages that through maceration with different plasticizers, the compactness of the plant fiber/glass fiber-based special thin-sheet substrate is reduced, thebulk of the material is improved, the absorbing quality is better, and the brittleness of the material is ameliorated, so that the plant fiber/glass fiber-based special thin-sheet substrate is difficult to break during construction and better meets the needs for production and life.

The invention discloses E-grade paper tube base paper. Quantification of the paper tube base paper is 420 g/m < 2 >, 500 g/m < 2 > or 520 g/m < 2 >, a transverse quantification allowable error range is +/-3%, and a longitudinal quantification allowable error range is 1.5%. The tightness is 0.60-0.62 g/cm < 3 >, and the moisture of the finished paper is 6.0-8.0%; the longitudinal ring crush index is 7.5 +/-0.5 N.m/g, and the interlayer bonding strength is 100 +/-20J/m < 2 >. Meanwhile, the invention discloses a process for preparing the base paper by adopting the steps of pulping, spraying starch preparation, paper forming, rewinding and packaging, pulping is carried out separately during pulping, and spraying starch is sprayed among all layers during paper forming. The finished paper disclosed by the invention is high in strength index, low in tightness and good in appearance quality, can effectively solve the problem of cracking during production of paper angle beads, and is free of scrap and powder falling; the preparation process mainly adopts a production process of adding the spraying starch between layers without pulp grinding to prepare a finished product.

The invention discloses an environmentally-friendly ecologic paper and a making method thereof. The environmentally-friendly ecologic paper comprises, by mass, 15-20% of bleached softwood pulp, 40% of chemi-mechanical wood pulp, 30-35% of poplar wood powder and 10% of polyester fibers. The finished paper has the advantages of loose structure, high water absorption rate, great reduction of the production cost, high surface flatness (smooth paper surface), increase of the interweaving force among fibers, improvement of the bonding force of the fibers, and enhanced tensile strength.

The invention relates to the technical field of aluminum electrolytic capacitor paper new materials, in particular to low-voltage low-loss electrolytic capacitor paper and a preparation method and application thereof. The invention relates to low-voltage low-loss electrolytic capacitor paper, which is prepared from the following fiber raw materials in percentage by mass: 30 to 60 percent of hemp pulp, 20 to 50 percent of tencel pulp and 10 to 50 percent of polyolefin short fiber, the beating degree of the hemp pulp is 15-50 degrees SR; the beating degree of the hemp pulp is 40-70 degrees SR, the beating degree of the tencel pulp is 40-70 degrees SR, the hemp pulp, the tencel pulp and the polyolefin short fibers are uniformly mixed and then fed into a paper machine drifting system, then wet-process papermaking forming is performed to obtain raw paper, and the raw paper is shaped by adopting a shaping drying cylinder to obtain a finished product of the low-voltage and low-loss electrolytic capacitor paper. The product has good absorptivity, relatively low aperture and relatively high strength, the used raw materials are high in purity, the high purity of the electrolytic paper can be effectively ensured, and the risk of aluminum foil corrosion is avoided.