41results about How to "Increased fibrillation" patented technology

The rubber-reinforcing fiber of the present invention is provided with a coating layer of a thickness of 10 Å to 40 mum. The coating layer is formed by dry plating and contains at least one metal and/or metal compound selected from the group consisting of cobalt, zinc, copper, titanium, silver, nickel and compounds of the aforesaid metals. With such a coating layer, the rubber-reinforcing fiber of the present invention forms a firm adhesion to a rubber component and drastically improves the fatigue resistance and durability of a rubber article, particularly, a pneumatic tire.

A process for making fibrillated fibers includes preparing a fluid suspension of fibers, low shear refining the fibers at a first shear rate to create fibrillated fibers having a reduced CSF, and subsequently higher shear refining the fibers at a second shear rate, higher than the first shear rate, to increase the degree of fibrillation of the fibers. The refining at the first shear rate may be with a rotor at a first maximum shear rate and the refining at the second shear rate may be with a rotor at a second maximum shear rate, higher than the first maximum shear rate. The process may further include pre-treating the fibers by high shear refining with impact to stress the fibers prior to low shear refining.

Methods and apparatus are disclosed herein that advantageously combine beneficial aspects of overdrive pacing and multi-site atrial pacing in order to provide an improved treatment for atrial fibrillation. The methods and apparatus include sensing of atrial activity at multiple sites within the atria at an overdrive pacing rate to detect intrinsic atrial depolarization, and delivery of pacing pulses to multiple sites within the atria to prevent or terminate arrhythmias such as atrial fibrillation.

This invention relates to a modifying method with enzyme method to sulfate wood pulp, in which, enzyme is added into the sulfate wood pulp before beating, the proportion of enzyme and the pulp is 20-1000g/t, the density is 3-15%, temperature: 20-60deg.C, time: 0.5-4h, pH: 5.0-8.5.

The invention discloses a method for improving the performance of wood chemimechanical pulp through biological enzyme pretreatment. Wood chips are subjected to material preparation, spiral extrusion,biological enzyme pretreatment, chemical impregnation and pulp grinding treatment to obtain the chemimechanical pulp, and the chemimechanical pulp is subjected to latency elimination, washing, screening and purification to form paper pulp for paper pulp performance testing. According to the method, biological enzyme pretreatment is carried out on the pulp before chemical impregnation, so that lignin on surfaces of fibers partially falls off, more fine fibers are exposed, more hydroxyl groups are exposed on the surfaces, and reaction between a chemical impregnation section and a liquid medicineis facilitated. The swelling degree of the fibers is increased, the binding force among the fibers is improved, and the interweaving force among the fibers is enhanced. When the method is used for treating broad-leaved wood such as poplar and eucalyptus, the bursting strength, tensile strength and tearing strength of the prepared chemimechanical pulp are remarkably improved, and meanwhile, pulping energy consumption is reduced.

The invention discloses high-stiffness sucker facial tissue and a preparation method thereof. The method comprises the following steps that 1, a bleaching needle and hardwood pulp are subjected to enzyme pretreatment with a biological enzyme, pulping is conducted, fiber is only subjected to longitudinal devillicate brooming, a filler, nano-crystalline cellulose, a sizing agent, a wet strength agent, a retention aid and the like are added, and fiber pulp capable of being applied to a net is obtained through deslagging and concentration adjusting; 2, the fiber pulp is formed and squeezed througha fourdrinier machine, rapid drying is conducted through a large-diameter dryer, surface sizing, drying, press polish and winding are conducted, and the high-stiffness sucker facial tissue is obtained. The prepared high-stiffness sucker facial tissue has very good stiffness and physical strength, forming is easier when the tissue is secondarily processed into a sucker, all indexes meet national food packaging material safety standards.

The invention discloses a grinding table of a disc grinder for preparing synthetic fiber pulp, which comprises a grinding plate, wherein the working surface of the grinding plate is provided with a plurality of grooves; the grooves are distributed in a multiple-layer concentric circle mode around the grinding plate; the grooves are evenly distributed on each layer of the concentric circle; grinding teeth are formed on the grinding plate between every two adjacent grooves on the same circle; and a pulp baffle plate is formed at the gap between any two adjacent layers. The invention can prolongthe the residence time of materials in the disc grinder, weaken the cut-off function of the grinding table, enhance the effects of crushing, kneading and fibrillation on the fibers, and greatly improve the microfibrillation degree of the pulp fibers.

A method for manufacturing improved regenerated cellulose fiber, by adding a crosslinking agent having two or more reactive functional groups in a molecule to a cellulose viscose solution and mixing, then extruding the viscose solution into a coagulation and regeneration bath, followed by applying a heat treatment, or followed by contacting obtained regenerated cellulose fiber with an aqueous solution of a crosslinking agent having two or more reactive functional groups in a molecule then applying a heat treatment.

Absorbent product including a laminate of at least two plies, wherein the absorbent product has a measured Y-Connected Area parameter greater than 20 and a Surface Channel Spacing of less than 2.5 mm. The absorbent product has high strength and low machine direction stretch.

The present invention provides a pharmaceutical composition for the treatment of diastolic congestive heart failure containing at least one active ingredient selected from the group consisting of icosapentaenoic acid, a pharmaceutically acceptable salt thereof, and an ester thereof.

Absorbent product including a laminate of at least two plies, wherein the absorbent product has a measured Y-Connected Area parameter greater than 20 and a Surface Channel Spacing of less than 2.5 mm. The absorbent product has high strength and low machine direction stretch.

The invention relates to the field of papermaking, in particular to a stickies control process in a process of producing high wet strength paper for daily use. The stickies control process comprises the following steps: selecting pulp, dispersing pulp, removing residues, milling, mixing, diluting, screening, shaping on a net, dehydrating and squeezing, drying and wrinkling. Pulp with low ash content is selected, the condition that stickies are produced by cohesion of resins and PAE wet strength agents is avoided, the long fiber proportion is increased, separating and brooming of fibers can be improved, partial wet strength is improved by improving the winding function of finished paper, and usage of the wet strength agents is reduced; moreover, according to a dry strength agent, the utilization efficiency of the wet strength agents can be improved, the dry strength agent has a temporary wet strength agent effect, has no adhesiveness in water and cannot deposit, the wet strength agent is efficiently utilized, a glyoxal polyacrylamide dry strength agent is coordinated with a PAE wet strength agent, the utilization effect of the wet strength agent can be improved due to mixed utilization, and the glyoxal polyacrylamide dry strength agent has no adhesiveness under a wet condition, so that the problem that the wet strength agent is adhered to a felt to cause stickies is solved.

The invention relates to a preparation process of baking raw paper. Bleached sulfate needlebush chemical pulp and bleached sulfate broadleaf wood chemical pulp are used as fiber for papermaking; a finished product is obtained through the steps of pulp sieving by thick pulp sieve, proportioning, slushing, sand removal and gas removal, sizing, fine sieving, net part dewatering shaping, squeezing, pre-drying, surface glue application, post drying, calendering, rolling and packaging. The raw paper prepared by the process has the advantages of high physical intensity (including deflection and folding resistance), high-temperature resistance, good dimension stability, uniform thickness, good smoothness, small surface adsorption performance and good shaping performance.

The subject matter of this invention is directed towards chemically and thermodynamically stable single-chain insulin (SCI) analogues that are resistant to deamidation and fibrillation. The invention further discloses improved methods for the recombinant expression, purification and refolding of SCI.

Modified fine cellulose fibers are produced by impregnating a cellulose with a reactive fibrillation solution or mixture containing a catalyst including a base catalyst or an organic acid catalyst, a monobasic carboxylic anhydride, and an aprotic solvent having a donor number of not less than 26 to esterify and chemically fibrillate the cellulose. This method provides a simple efficient process for producing modified fine cellulose fibers that have a diameter from several nano-meters to submicrometers, a large aspect ratio, a high degree of crystallinity, less damage in the shape or crystalline structure of the fine fibers, a large aspect ratio, and an excellent dispersibility in an organic solvent; The catalyst may contain a pyridine compound. The monobasic carboxylic anhydride may be a C_2-4aliphatic monocarboxylic anhydride. The resulting modified fine cellulose fibers modified with a monobasic carboxylic anhydride may have a degree of crystallinity of not less than 70%, an average fiber diameter of 20 to 800 nm, and an average fiber length of 1 to 200 μm.

The invention discloses a wood chip ultrasonic assisted chemical impregnated pulping bleaching method. Wood tips are sequentially subjected to preparation, ultrasonic pretreatment, spiral extrusion, chemical impregnation and defibrination treatment. By means of the ultrasonic cavatition, a channel where liquid flows inside wood is broken through, the fluid permeability of the wood to be impregnated is enhanced, the effective channel area inside the wood is enlarged, and the impregnation efficiency is improved. The wood chips obtained after ultrasonic treatment are subjected to dual-screw extrusion, chemical impregnation is performed on extruded raw materials, then, defibrination treatment is performed, and finally latency, washing, screening and purifying are performed to obtain paper pulp. By adopting the ultrasonic assisted chemical impregnation method, the impregnation homogeneity of chemical drugs is improved, the defibrination energy consumption is lowered, the paper pulp fiber quality is improved, and finally paper pulp with the high whiteness and good strength can be obtained.

The invention discloses a beating system for improving fiber beating degree, which comprises a beating machine body and a base, a bottom plate is provided at the lower part of the beating machine body, and two symmetrically arranged weight sensors are arranged between the bottom plate and the base. There is a stirring tool in the beater body, and the stirring tool is connected to the drive motor through the bottom plate. A beating enzyme feeding device is provided on the upper right side of the beating machine body, and the beating enzyme feeding device is connected to the inside of the beating machine through a pipeline. Cavity, the left side of the upper part of the beater body is provided with a water supply device, and a control device is provided below the water supply device, and the control device is connected to a weight sensor. The beating system of the present invention can automatically determine the fiber weight in the beater body when beating. According to the weight of the fiber, beating enzyme is added to modify and soften it, and then it is mechanically beaten with a stirring knife, which improves the beating degree of the fiber and saves energy consumption.

Synthetic paper, including: between 10 and 90 wt. % of structural fibers, and between 90 and 10 wt. % of bonding fibers. The structural fibers are poly(p-phenylene telephthalamide) (PPTA) fibers having a fineness of between 1 and 2 d, and a length of between 3 and 10 mm. The bonding fibers are fibrids or a pulp of the PPTA. The structural fibers and the bonding fibers are shaped by a wet-forming papermaking method, and hot rolled to form the synthetic paper.

A method for producing cellulose diacetate with bamboo fibers as a raw material having the steps of soaking, treating with ultrasonic sound, de-acidifying, acetylating, hydrolyzing, precipitating, screening, extruding, washing, rolling, and drying. The method reduces the material loss and pollution, completely swells and dissolves the bamboo fibers, accelerates the fibrillation, reduces the crystallinity, improves the accessibility of the fibers, recycles acetic acid, and reduces the material consumption.

The invention relates to the technical field of papermaking, in particular to an enzymatic pulping process. The enzymatic pulping process comprises the following steps: 1, modifying first laccase andsecond laccase separately to obtain modified first laccase and second laccase; 2, defibering a needle leaf wood-pulp board by a hydrapulper, then stirring, adding the first laccase and nanometer bentonite suspension liquid, reacting for 2 hours and pulping, wherein the use amount of the first laccase is 0.3 kg per ton of pulp; 3, defibering a broad leaf wood-pulp board by the hydrapulper, then stirring, adding the second laccase and the nanometer bentonite suspension liquid, reacting for 2 hours and pulping, wherein the use amount of the second laccase is 0.3 kg per ton of pulp; and 4, mixingthe needle leaf wood pulp and the broad leaf wood pulp, then adding composite enzyme, performing treatment, feeding into a pulping machine and pulping. The technical problem that the energy consumption is reduce less in the existing the enzymatic pulping process is solved.