266results about "Severing to form staple fibres" patented technology

In one embodiment, a fiber treatment system includes a rotatable nubbed roller including an axis of rotation, a surface, and a number of spaced apart nubs projecting away from the surface, the number of spaced apart nubs imparting a number of spaced apart openings in a fiber tow. In another embodiment, the fiber treatment system further includes an optionally rotatable spreader roller for flattening the fiber tow. In yet another embodiment, the loosened, but still continuous fiber tow is chopped by a downstream chopper to form short fibers with reduced tow sizes.

The invention discloses a method for directly producing felt base cloth polyester short-fiber by recovered polyester bottle sheets, comprising the steps as follows: the recovered polyester bottle sheets are sorted, crushed, cleaned, dried, extruded in a melting state, filtrated, measured, spinned, cooled by circular wind, coiled and oiled, pulled, fed, dropped in a barrel, balanced, collected into bundles, primarily pulled by oil bath, secondarily pulled by steam, tensioned and thermally shaped, oiled, folded, curled, loosened and thermally shaped, cut off and finally packaged. Compared with the felt base cloth polyester short-fiber produced by taking the polyester new material as raw material, the felt base cloth polyester short-fiber produced by the method has almost the same performances and lower price, does not affect the production, processing and use of the next user product, still keeps all product performances of the next user product, lightens the harms of the wastes on the environment, and solves the environmental protection problem.

The invention relates to a method for preparing polyester staple fibers from waste polyester fibers and belongs to the technical field of chemical fiber preparation. The method includes leading recycled waste polyester cloth, waste polyester fiber or waste polyester lumps into a crusher, leading the crushed materials into a compacting device for water removal and compaction to obtain dried polyester waste with the moisture content being less than 200PPm, then feeding the dried polyester waste into a screw extruder for melt extrusion, meanwhile vacuumizing to remove low molecular weight substances brought into the raw materials, filtering melt extruded via a screw extruder, leading the filtered melt into a spinning box via a metering pump for melt spinning, cooling and solidifying filaments extruded from a spinneret plate via cross air blow, oiling the filaments, gathering the filaments into tows and spooling to obtain nascent fibers; gathering the nascent fibers into tows via a creel, leading the tows into a drafting system via a godet machine for drafting, discharging from the drafting system to obtain draft filaments, and performing crimping, drying, relaxation setting, cutting off and packing to obtain finished products. The process is concise, and process stability is ensured; resources are saved; preparation efficiency is high.

The present invention discloses one kind of yarn cutting machine, which includes one frame, one yarn feeding mechanism, one yarn cutting mechanism, and one intermittent driving mechanism for driving the yarn feeding mechanism and the yarn cutting mechanism. The yarn cutting mechanism includes one fixed cutter mounted on the frame, one moving cutter moving in the direction perpendicular to the yarn feeding direction, one cutter holder for the moving cutter to be mounted on, one yarn clamping unit on the cutter holder and one moving cutter driving reciprocator. The present invention has simple structure, convenient use and great cutting capacity.

A method for separating long, unwound items like fiber, fiber strands, yarn, etc. having a liquid chemical sizing on the surfaces into short lengths by chopping is disclosed.

Improved chopping life is achieved by using blades, or at least blade edges of cemented tungsten carbide, and selecting the liquid chemical sizings having a pH of about 7 or greater to apply to the surfaces of the items being chopped. Also disclosed are blades having at least the sharp edges of the chopping blades coated with various materials including a material selected from a group consisting of tungsten carbide, titanium nitride, diamond like carbon, polycrystalline diamond, polycrystalline cubic boron nitride, cemented tungsten carbide, or mixture of two or more of these materials. These coated blades can be used to separate items having both neutral, basic and acidic sizings thereon

A process for debundling a carbon fiber tow into dispersed chopped carbon fibers suitable for usage in molding composition formulations is provided. A carbon fiber tow is fed into a die having fluid flow openings, through which a fluid impinges upon the side of the tow to expand the tow cross sectional area. The expanded cross sectional area tow extends from the die into the path of a conventional fiber chopping apparatus to form chopped carbon fibers, or through contacting tines of a mechanical debundler. Through adjustment of the relative position of fluid flow openings relative to a die bore through which fiber tow passes, the nature of the fluid impinging on the tow, the shape of the bore, in combinations thereof an improved chopped carbon fiber dispersion is achieved. The chopped carbon fiber obtained is then available to be dispersed in molding composition formulations prior to formulation cure.

The invention discloses ultrahigh molecular weight polyethylene short fiber and a preparation method thereof. The preparation method includes: preparing protofilament of the ultrahigh molecular weight polyethylene short fiber, subjecting the protofilament to assembly winding and bundling, and cleaning oil on the protofilament; applying anionic high-strength polyethylene short fiber oil, performing cold crimping, and loosening and setting the crimped fiber at 80-120 DEG C, wherein drying time is 5-30min, and drying thermosetting temperature is 90-100 DEG C; adjusting tension, and cutting to obtain ultrahigh molecular weight polyethylene short fiber of 3-10/25mm in crimp number, wherein cutting length is 3-102mm. The section of the ultrahigh molecular weight polyethylene short fiber is special-shaped, the short fiber has certain natural crimping characteristic and is easy to comb and glue, and cohesion, spinnability and blending performance of the short fiber are improved; fiber number of the short fiber is 0.5-2.5dtex, cutting length is 3-102mm, and strength is 10-40cN/dtex, so that requirements on different styles of subsequent spinning processes can be met.

The invention relates to an ultra-fine denier nylon stable fiber production method which solves technical problems that a conventional spinning device can produce ultra-fine denier nylon, the spun ultra-fine nylon has stable performance and is easily dyed, and the production cost is substantially reduced. The production method comprises the following steps: (1) spinning, on a double-screw melt-spinning device, master batches are added and mixed with nylon slices to lead that the content of the master batches is 1-10%, the melt mixture fusant is extruded into a spinning pack by a screw, filtered by sea sand and squeezed out by a spinneret orifice to form silk flock, wherein the diameter of the spinneret orifice is 0.15-0.35mm and the length-diameter is 2-4; the pressure of the screw is 80-100kg/cm<2>; sea sand is 60 meshes, 80 meshes or 100 meshes; and a filter screen is 250 meshes or 400 meshes; (2) cooling; (3) oiling and winding; (4) bundling; (5) oil immersion; (6) drawing; (7) curling; (8) loosing and heat shaping; (9) cutting, obtaining the product.

An article of manufacture making system for making an article of manufacture containing a plurality of dry solid additives, such as fibers, that utilizes a dry solid additive delivery system with a relatively low Stokes Number for the dry solid additives.

A device for chopping fiber strand includes a form, and a strand feeding mechanism that delivers the strand to the form and conveys the strand along the form. First and second grinding wheels may be included to cut the strand into individual segments of desired length as the strand is conveyed along the form. A method of chopping a fiber strand includes the steps of delivering a continuous strand onto a base end of a form, conveying the continuous strand along the form from the base end toward a discharge end and cutting the continuous strand into individual segments of desired length, for example using first and second grinding wheels.

The invention discloses a preparation method of a micro/nano fiber aerogel composite filter material, and belongs to the field of textile materials. The specific preparation method comprises the following steps: (1) preparing micro/nano fibers; (2) shearing and crushing the micro/nano fibers prepared in the step (1) to prepare a dispersion liquid; (3) impregnating a base material in the fiber dispersion liquid obtained in the step (2), carrying out freeze-drying molding, carrying out suction filtration on the base material and the fiber dispersion liquid by adopting a vacuum suction filtrationmethod to obtain a wet-state composite material, and performing freeze drying on the wet composite material to prepare an aerogel material; and (4) reinforcing the aerogel composite filter material obtained in the step (3) to obtain the micro/nano fiber aerogel composite filter material. According to the invention, the micro/nano fiber aerogel composite filter material with the continuous gradient structure is prepared by adopting a vacuum filtration method, is high in filtration efficiency, and is suitable for the fields of high-temperature flue gas filtration, oil/water, heat insulation, sound absorption, fiber reinforced composite materials and the like.

The invention provides a preparation method for regenerative polyester staple fiber, comprising the following steps: drying polyester regenerated material, mixing the polyester regenerated material with inorganic granule, melting by a screw melt extrusion spinning machine, spinning, cooling, bundling and applying oil, falling bucket in reciprocating manner and bundling; carrying out first-stage oil bath traction by a traction machine, carrying out second-stage steam traction by the traction machine, carrying out tension heat shaping by the traction machine, cooling and applying oil, carrying out three-stage tension by the traction machine, and cutting by a staple fiber cutting machine; the method has low production cost, high efficiency, energy-saving and environment-friendly performances; the fiber prepared by the invention has high density, large oil absorbing quantity and has good dispersity, and is not easy to intertwist, thereby improving mechanical property, remarkably reducing thermal shrinkage and aging resistance; and, the bond stress with the aggregate is enhanced in the asphalt concrete, thereby remarkably improving the reinforcing effect of asphalt concrete.

The invention discloses a subsection ramie unglued producting method which determines the different branch numbers according to fiber length, it includes raw ramie pre-process, coming unglued, post process, its character lies in: in pre-process, the raw ramite are divided into segments, the length is from 50 to 400 mm. The invention shortens the craft, and enhances the quality of coming unglued.

A blade cartridge for a fiber roving chopper comprises an annular support and a plurality of blade holders. Each of the plurality of blade holders comprises a main body portion, a first end, a second end, and a blade. The first end of the main body portion is connected to the annular support. The second end of the main body portion is opposite the first end such that the main body portion is cantilevered from the annular support. The blade is integrally seated in the main body portion and extends between the first end and the second end. In a further embodiment of the invention, the main body portion of the blade holder includes first and second end notches that extend through the main body portion and the blade.

A cutting device for shear-cutting of fibre strands comprises at least two cutting units which are rotatably drivable about an axis of rotation and two counter cutting units which are rigidly mounted relative to a base frame. The cutting edges of the cutting units as well as the counter cutting edges of the counter cutting units are positionable relative to a common cutting plane independently of each other. The forces acting on the counter cutting edges are measured during a cutting process by means of corresponding measuring sensors, allowing the position of the counter cutting edges to be controlled by means of a control unit via electrically driven displacement devices.

An air cannon, formed by associating an air amplifier and an outlet cone with one another, receives chopped fibers and forcefully deposits the chopped fibers on a collection surface or web moving beyond an outlet end of the outlet cone. The air amplifier includes insert structure formed of an abrasion resistant material to prevent abrasive wear within the air amplifier caused by the chopped fibers. A binder is applied to the resulting mat of chopped fibers, the binder is activated by the application of energy with the resulting treated mat being compacted, cooled and rolled up to form a chopped strand mat package. For wide mats, one or more banks of air cannons extend across the moving collection web. The air cannons of each bank are alternately directed up-line and down-line of the web to reduce interference between the air cannons by means of L-shaped support rods which have generally horizontal and generally vertical legs which are separated from one another by acute and obtuse angles for up-line and down-line direction, respectively. The air cannons can also be individually adjusted to vary the aimed direction of the air cannons across the web by rotation of the generally horizontal legs of the L-shaped support rods. The air cannons forcefully direct chopped fibers to the web to overcome air turbulence within a forming hood and forces due to static electricity.

A powder metal mixture comprises a lubricant powder conventionally used to produce powder metal parts in combination with micronized cellulose fibers in an amount less than 2% by weight of the mixture. The addition of fibers with the lubricant increases green strength of a part made by compacting the mixture and improves dimensional conformance.

A method and apparatus for chopping long unwound items like fiber, fiber strands, yarn, etc. having an idler roll for pressing the item(s) against a backup roll for pulling the item(s) into the chopper, the idler roll being an assembly allowing the idler roll to pivot around a pin inside the idler roll assembly to keep the surface of the idler roll in proper contact with the items being chopped.

Provided is a production device for chopped glass strands wherein deep grooves do not easily form in the surface of a rubber-covered roller even when the peripheral speed of a cutter roller is set faster than the peripheral speed of the rubber-covered roller. A production device (100) for chopped glass strands equipped with a rubber-covered roller (11) for conveying downstream glass strands (F) supplied from upstream and a cutter roller (10) for cutting the glass strands (F) while rotating in contact with the surface (11a) of the rubber-covered roller (11), in which the rubber-covered roller (11) and the cutter roller (10) each rotate in a manner such that the slip ratio (S) of the cutter roller (10) to the rubber-covered roller (11) represented by formula (1) constantly varies by positive values. (1) S(%)=(v1/v2-1)×100 (v1: peripheral speed of outer periphery of cutter roller; v2: peripheral speed of outer periphery of rubber-covered roller.)