37 results about "Fiber Chemistry" patented technology

Ballistic resistant materials having improved strength and lighter weights. More particularly, improved ballistic resistant fabrics produced from drawn, high modulus fibers having a reduced fiber diameter and improved physical strength properties, without changing other properties such as fiber chemistry, binder resin type and binder resin content. The fabrics incorporate low denier per filament monofilament fibers, low denier per filament multifilament fibers, or a combination of low denier per filament monofilament fibers and low denier per filament multifilament fibers in a specialized fabric construction to form fine fiber layers and fabrics having enhanced strength and fiber areal density without altering the fabric weight, or having reduced fabric weight without a corresponding reduction in ballistic performance.

The invention relates to preparation methods of non-woven materials and particularly relates to a preparation method of regenerated leather. The preparation method comprises the following steps: sequentially extracting leather fibers, blending materials, distributing the materials, maintaining slurry, automatically draining water, dynamically pressing and dehydrating, flatly pressing and moulding at high pressure, drying, cutting edges, coiling, carrying out surface-treating, coating or moving a film to prepare a continuous broad product, wherein the fiber extraction step comprises the following steps: smashing leather and extracting fibers and putting the fibers in water and soaking; the material blending step comprises the following step: putting the soaked leather fibers and a chemical assistant in a stirring barrel to be uniformly stirred; the slurry maintaining step comprises the following step that the blended slurry is distributed on a conveyer belt to be fed above a slurry maintaining device to accomplish the polymerization reaction to form a basic form of leather blank slurry; the dynamically pressing and dehydrating step comprises the following step: pressing on the leather blank slurry through a flat pressing disc of a dynamic flat pressing device and squeezing water by means of weight of the flat pressing disc; the step of flat pressing and moulding at high pressure comprises the following step: pressing the leather blank to be moulded by an upper pressure plate of a hydraulic press which descends. The preparation method provided by the invention adopts a simple process flow, is low in cost, high in production efficiency, good in product quality, and wide in application range and has energy-saving and environment-friendly effects.

The invention relates to a composite material filament having rheological characteristics suitable for use in additive manufacturing by extrusion, a method for manufacturing a three-dimensional composite product with an additive manufacturing system from a filament of such composite material, and to a three-dimensional composite product obtained by an additive manufacturing system using such composite material. The filament is formed of material comprising semi-crystalline polylactic acid and chemical pulp of wood-based cellulose fibers, wherein the amount of chemical pulp of wood-based cellulose fibers is selected such that sufficient complex viscosity is obtained at melt state, such that upon additive manufacturing by extrusion, composite melt formed of the filament has a ratio of shear storage modulus to shear loss modulus G′ / G″ equal to or higher than 1.0 at a temperature equal to or higher than 133° C.

The invention discloses a preparation method of a graphene-based hybrid multilayer structure fiber material and application of a sensor material, and belongs to the technical field of preparation of functional nano materials. Transition metal ion cross-linked graphene oxide fibers are prepared through a wet spinning technology, the strength and the conductivity of the fibers are improved through chemical reduction, then the fibers and a proper amount of melamine are mixed in an inert gas atmosphere, thermal reduction in-situ catalytic growth of carbon nanotubes is conducted, and graphene-basedhybrid multilayer structure fibers are obtained. The material prepared by the preparation method of the graphene-based hybrid multilayer structure fiber material has the advantages of high sensitivity, large detection range, high response speed and good stability in sensor material application. The whole preparation process of the material is simple, no toxic product is generated in the reactionprocess, the energy consumption is low, and the method is environment-friendly and suitable for industrial large-scale production.

A benzoxazolium ion compound represented by the following formula X, a sizing agent comprising the compound, a preparation method and use thereof. The chemical structure of the benzoxazolium ion compound represented by formula X is similar to that of PBO fiber, which is beneficial to improve the compatibility of sizing agent and PBO fiber, and its preparation process is simple and easy to operate. The sizing agent overcomes the problems of poor compatibility between the existing sizing agent and PBO fibers, the need to use a large amount of flammable and explosive organic solvents in the sizing agent, and the difficulty in effectively covering the fiber surface with nano reinforcements in the sizing agent. The sizing agent uses water as a solvent, is green and efficient, is simple to prepare, and is environmentally friendly, and the sizing agent can not only maintain the original tensile strength of the PBO fiber, but also significantly improve the IFSS of the composite material.

The invention relates to coating and in particular relates to anticorrosion antistatic coating and a preparation method thereof. Raw materials of the anticorrosion antistatic coating comprise a film forming material, nano metal fibers, chemical antirust pigments, fillers and auxiliaries, wherein metal level of the nano metal fibers is lower than level of steel. The anticorrosion antistatic coating has the beneficial effects that nano zinc oxide fibers are adopted; the defect that nano zinc oxide can be easily agglomerated and is difficult to disperse is overcome; conductive fibers have small diameter and great length-diameter ratio, so that a small amount of conductive fibers can form a conductive network structure in coating, and influence on other properties of the coating can be reduced; and contradiction between static conductivity and corrosion prevention property of the coating in the traditional concept is surmounted, and the paint has two functions, namely corrosion prevention and static conduction.

The invention relates to the field of textile natural fibers, and provides a ramie fiber softening method comprising the following step (1) of immersing ramie fibers into a sodium hydroxide solution for swelling treatment; the step (2) of taking out the swelled ramie fibers, and placing the ramie fibers into water; gradually adding acidic solutions till pH is neutral, and washing the ramie fiberswith purified water; the step (3) of freezing and drying the washed ramie fibers, so that gaps of the ramie fibers are reserved; the step (4) of immersing the frozen and dried ramie fibers into ionicliquid with a certain concentration for ultrasonic treatment; the step (5) washing and drying the treated ramie fibers to obtain softened ramie fibers. According to the ramie fiber softening method, the crystallinity and modulus of the ramie fibers can be reduced obviously; since lots of gaps are increased in the ramie fibers, the moisture absorption and release properties of the fibers are improved; and meanwhile, by this way, the chemical composition of the fibers is not damaged, and the antibacterial component of the fibers can be reserved, so that the antibacterial activity of the fibers is reserved.

The invention relates to a method for chemical nickel-phosphorus plating of quartz fibers, and belongs to the technical field of chemical nickel plating. According to the method, the catalytic actionof nickel is utilized, an activating agent is added into a plating solution, through the matching effect of a rotor and the quartz fiber mechanical grinding, a nickel-phosphorus coating can be directly deposited on the surface of the quartz fibers, the pre-treatment process of coarsening, sensitizing and activating is omitted, meanwhile, the use of palladium chloride with toxicity and high price is avoided, the process flow is simplified, the cost is reduced, the operation safety is improved, and the method has a good industrial application prospect.

The invention belongs to the field of pulping and papermaking, in particular to a method for preparing natural-color bamboo fiber biochemical mechanical pulp. The method comprises the following steps: 1) using a dry method to prepare materials; 2) sending the bamboo chips obtained in step 1) into an extruder for pressing; 3) combining animal manure with bamboo chips, bamboo chips, bamboo pith and knots, etc. Fine debris, after mixing in proportion, carry out aerobic fermentation and composting, and add high-efficiency active biological complex bacteria at the same time; 4) After the fermentation is finished, carry out screening and dust removal treatment; 5) Wash the bamboo chips after screening and dust removal by washing machine Surface material and remove excess water; 6) pre-impregnation with lye; 7) pulping or beating; 8) copying. This method combines biological, chemical and physical methods to produce natural color bamboo fiber chemical mechanical pulp for packaging, and at the same time makes full use of the leftovers in the production process, turning waste into treasure, and realizing the fullness and high quality of bamboo raw materials use.

The invention discloses a filament bundle fiber chemical modification production device which sequentially comprises a bundle finishing machine, a hydrolysis reactor, a first presser, a first rinsing trough, a second presser, a descaling bath, a third presser, a second rinsing trough, a fourth presser, a dryer and a packer. The filament bundle fiber chemical modification production device is characterized in that the hydrolysis reactor comprises a hydrolyss tank and a filament reciprocating frame placed in the hydrolysis tank, wherein the filament reciprocating frame is of a rectangular frame structure and comprises an upper row of yarn guide rollers and a lower row of yarn guide rollers, the quantity of each row of yarn guide rollers is at least 10, and the quantity of the upper row of yarn guide rollers is 1 more than that of the lower row of yarn guide rollers; each presser mainly comprises a front pressure roller pair and a rear pressure roller pair and a middle yarn guide roller; and the second presser, the third presser and the fourth presser are same as the first presser in structures.