33results about How to "Bursting strength" patented technology

The invention described relates to a composition for a multilayer tube having an inner and an outer layer. Preferably the inner layer of the tube has at least one at least partially crosslinked, preferably polyethylene, which is less flexible than the adjacent more flexible outer layer, which is preferably a thermoplastic elastomer. The inner and outer layers are typically coextruded during manufacture, with at least one overmolded end, preferably crosslinked, which generally has an internal diameter which is essentially the same as the internal diameter of the multilayer tube. The multilayer tube is typically crosslinked, preferably by electron beam.

Balloon catheters are provided having the balloon length is substantially surrounded by an elastic cover. The balloon and the cover maintain a substantially and circular cross-section along the balloon length during inflation. The cross section is able to maintain a uniform size down the length of the balloon during inflation.

The invention discloses a high temperature resistant flame retardant filter paper used for a diesel filter and a preparation method thereof. The high temperature resistant flame retardant filter paper comprises the following raw materials in parts by weight: 60-70 parts of wood pulp celluloses, 30-40 parts of vinylon fibers, 10-15 parts of glass fibers, 2-5 parts of dolomite dust, 1-3 parts of nanometer titanium dioxide, 2-4 parts of light calcium carbonate, 1-2 parts of modified nano-carbon, 1-2 parts of nanometer titanium oxide, 0.5-0.8 part of ammonium dihydrogen phosphate, 3-4 parts of modified water-soluble phenolic resin emulsion, 2-5 parts of styrene-acrylic emulsion, 0.5-1 part of diethanolamide, 0.5-1 part of silane coupling agent KH550, 0.4-0.8 part of sodium laurylsulfate and 4-6 parts of a wet strength agent. The filter paper, prepared by the invention, has the advantages of good water permeability, large filtering area, small maximum aperture, high filtering precision, strong bursting strength, high temperature resistance and flame resistance, the filtering efficiency is 99.999%, the filter paper has stable performance index at normal temperature and high temperature, and better temperature resistance and filtering effect.

The invention discloses zirconium oxide-loaded silicone air filtration paper and a preparation method thereof. The air filtration paper comprises the following raw materials in part by weight: 70 to 80 parts of wood pulp, 20 to 30 parts of jute pulp, 10 to 20 parts of ceramic fiber, 2 to 5 parts of modified silicone, 1 to 3 parts of nano calcium carbonate, 2 to 4 parts of activated carbon, 1 to 2 parts of nano aluminium oxide, 0.5 to 0.8 part of ammonium polyphosphate, 2 to 3 parts of acrylic latex, 1 to 2 parts of polyethylene glycol, 0.5 to 1 part of tricresyl phosphate, 0.5 to 1 part of anilmomethyl triethoxy silane, 0.4 to 0.8 part of sodium lauryl sulfate and 2 to 5 parts of modified polyethyleneimine. The prepared filtration paper has the advantages of high water permeability, filtration accuracy, bursting strength and tensile strength, large filtration area, high temperature resistance and the like, the maximum aperture is small, and the filtration efficiency reaches 99.98 percent; and the filtration paper has a stable performance index under the working conditions of normal temperature and high temperature and has relatively good heat resistance and filtration effects.

The invention provides hot-pressing tympan paper and a manufacturing method thereof. The hot-pressing tympan paper is composed of a surface layer, a core layer and a bottom layer, wherein, the oven dry stock weight of the surface layer accounts for 20-30% of the total oven dry stock weight, the oven dry stock weight of unbleached pulp used by the bottom layer is the same as the oven dry stock weight of batter, the oven dry stock weight of unbleached pulp and coal ash fiber slurry used in a core layer accounts for 40-60% of the total oven dry stock weight, and the oven dry weight ratio of unbleached pulp to coal ash fiber slurry is 25-40:60-75. The method is characterized in that a multi-layer manufacturing technique of the core layer containing coal ash fiber is adopted to generate hot-pressing tympan paper, compared with a manufacturing technique adopted by current hot-pressing tympan paper, the produced hot-pressing tympan paper has the advantages of level surface, large bursting strength, strong buffering capacity, good temperature tolerance, good temperature conductivity and the like.

The invention discloses a rapid-growth poplar sodium hydroxide anthraquinone pulp biochemical method TCF bleaching process. The process is characterized in that the process comprises the steps that: (1) steaming is carried out, wherein rapid-growth poplar wood sheets are steamed in a steaming pot, such that an original pulp is obtained; washing and screening are carried out, such that paper pulp is obtained; (2) xylanase pretreatment is carried out; (3) TCF bleaching is carried out, wherein the treated paper pulp is bleached with one of the bleaching sequence selected from OP-Q-P, O1-O2P-Q-P and O1P-O2P-Q-P. According to the invention, paper pulp is pretreated by using xylanase, and bleaching is carried out with one of the three bleaching sequences of XOPQP, XO1O2PQP and XO1PO2PQP, such that paper pulp with higher whiteness and viscosity are obtained. Compared with paper pulp obtained by direct bleaching without xylanase pretreatment, the paper pulp provided by the invention has lower beating whiteness loss. A folding resistance is higher by 30-49 times, a burst index is higher by 0.3-0.6N.m.g<-1>, a breaking length is higher by 0.15-0.36KM, and a tearing index is not significantly changed. When a same or similar beating degree is reached, needed beating revolutions are less, and beating energy consumption can be saved by approximately 17.8%.

The invention discloses a starch-based fully-degradable nano antibacterial material and a preparation method thereof. The starch-based fully-degradable nano antibacterial material is prepared from thefollowing substances in parts by weight: 80 to 100 parts of starch, 5 to 50 parts of plant fibers, 0.1 to 3 parts of nano chitosan, 0.01 to 0.1 part of carbon nanotubes, 0.001 to 0.1 part of cellulose nanocrystals, 0.1 to 1 part of a surfactant and 65 to 200 parts of water. According to the invention, a plurality of methods such as starch modification, nano chitosan, carbon nanotubes, cellulose nanocrystalline, plant fiber modification, injection molding, micro-explosion foaming and the like are combined to obtain the light-weight, antibacterial and fully-degradable nano material; meanwhile,the material has stronger pressure resistance and bursting strength than common starch products; the whole production process is free of wastewater, waste gas and waste residues, safe and environment-friendly.

The invention discloses heat-resistant latex abrasive paper raw paper. The heat-resistant latex abrasive paper raw paper contains the following raw materials in parts by weight: 14 parts of a hydroxypolyacrylate emulsion, 5 parts of a cellulose acetate butyrate solution, 30 parts of bleached sulfate softwood pulp, 26 parts of broad-leaf blenched chemical wood pulp, 5 parts of a PVM/MA copolymer,6 parts of diacetone alcohol, 2.5 parts of an aqueous polyisocyanate solidifying agent, 5 parts of polyacrylamide, 14 parts of a 900-mesh environment-friendly pigment, 6 parts of talcum powder, 5 parts of an aid and 7 parts of a flame retardant. The invention further discloses a manufacturing method of the heat-resistant latex abrasive paper raw paper. The required materials are easily available,and the prepared heat-resistant latex abrasive paper raw paper has good bursting strength, folding strength, water absorption value and heat resistance.

A fruit-protecting bag for protecting growth of fruits is made up from paper pulp through digestion, bleaching, filtering, mixing it with durable non-toxic or low-toxin antibacterial chemical, stirring, making paper, baking and making the fruit-protecting bags. Its advantages include no need of spraying agricultural chemical, and high light shielding, wind and rain resistance, hydrophobicity and air permeability.

The invention relates to the field of special paper manufacturing, in particular to water-resistant transparent paper as well as a preparation method and application thereof. The cellulose water-resistant transparent paper with the fiber diameter of 5-999 nm is provided, the fibers are mutually entangled and do not depend on the maintenance of hydrogen bonds, and the cellulose water-resistant transparent paper still has high wet strength in water. The cellulose molecular structure is not modified, a hydrophobic additive difficult to degrade is not introduced, the influence on a cellulose crystal structure is reduced as far as possible, and the performance of a cellulose-based material is maintained, so that control on cellulose fibers with the diameter as low as 5nm is realized, excessive influence on the transparency of paper is avoided, the transparency can reach 92%, and the balance of water resistance and transparency of the cellulose paper is well realized. The water-resistant paper prepared by the invention is easy to degrade and environment-friendly, has excellent performance and wide application scene, and has good commercial prospect.