950results about "Filament manufacture" 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.

A 3D extrusion print process for producing multicolored three-dimensional objects is provided. The process produces mechanically stable, multicolored 3D objects with good color definition. The process according to the invention is based on coating, upstream of the printing head, of the polymer strand used for producing the actual object, and on fixing of the coating upstream of entry of the polymer strand into the printing head. Downstream of the extrusion process in the printing head, the coating remains predominantly at the surface of the extruded strand.

The present invention relates to a novel process for the production of coated filaments for subsequent application as print in extrusion-based 3D printers, e.g. FDM printers (fused deposition modelling printers). The filaments are coated in a separate process outside of the printer, and can also be used in a conventional extrusion printer. The present invention further relates to the coating device for application of the coating to the filament and to a roll containing the coated filaments.

The invention relates to medical chitosan fiber in the textile processing field and a preparing method thereof, the method for preparing spinning fluid comprises the following steps: arranging the chitosan powder in glacial acetic acid water solution and slowly dissolving by stirring under the condition of controlling temperature and time, wherein the dissolution temperature is 10-30DEG C, the dissolution time is 10-48h, and the stirring speed is 60-180r/min, wherein the chitosan powder occupies 3%-10%, dissolvent glacial acetic acid occupies 1%-5% and the other is water in the spinning raw materials, the chitosan content is more than 99.9% in chitosan fiber, and the chitosan fiber has higher molecular weight, sufficient amido, steady fiber structure, and good antibacterial property, brute force and hygiene security property.

The invention discloses a preparation method of nylon fibers. The preparation method comprises the following steps: directly spinning after taking raw materials containing 1,5-pentamethylene diamine and adipic acid to react. The invention further provides the nylon fibers prepared by the method. The method adopts a manner of combining nylon polymerization and fusion direct spinning to prepare nylon 56 wires so that the production cost is reduced, the waste gas is reduced and the pollution to the environment is reduced. The high-performance nylon fibers prepared by the method can be further used for preparing textile materials including yarns, woven fabrics, knitted fabrics or non-woven fabrics, can be widely applied to the fields of clothing material industries, decoration carpets and the like, and has a wide industrial application prospect.

A multi-component conductive yarn which includes a primary component and a secondary component. The primary component consists of at least one elongated filament formed of polymeric material while the secondary component consists of a blend of polymeric material and carbon nanotubes. The secondary component is bonded with the primary component along its length. The carbon nanotubes comprise up to 20% of the secondary component. The conductive yarn comprises no more than 10% carbon nanotubes.

PCT No. PCT/JP97/04541 Sec. 371 Date Dec. 18, 1998 Sec. 102(e) Date Dec. 18, 1998 PCT Filed Dec. 10, 1997 PCT Pub. No. WO98/45515 PCT Pub. Date Oct. 15, 1998The present invention provides a method and apparatus, in which a reinforcing fiber bundle consisting of a plurality of paralleled single fibers is or a plurality of mutually paralleled reinforcing fiber bundles respectively consisting of a plurality of paralleled single fibers are driven to run through a plurality of rolls while being bent to open the fiber, and in which the opened reinforcing fiber bundle is impregnated with resin to produce a prepreg, comprising vibrating at least one of the rolls in the axial direction of the roll, to open the reinforcing fiber bundle(s), pressing the reinforcing fiber bundle(s) to the peripheral surface of a roll located immediately downstream of the vibrating roll without vibrating the roll, and bringing the opened reinforcing fiber bundle(s) into contact with the peripheral surface of the non-vibrating roll with a contact length of not less than twice the contact length of the reinforcing fiber bundle(s) on the vibrating roll, for retaining the opened state of the reinforcing fiber bundle(s). The present invention allows the reinforcing fiber bundle(s) to be opened stably with little fuzzing caused, for producing a uniform and thin reinforcing fiber sheet, and from the uniform and thin reinforcing fiber sheet, a uniform and thin crack-less prepreg with a good grade can be obtained.

After yarns or tows (10) have been pre-spread and placed side by side substantially in a common plane, their surface is swept by at least one jet of air (22) displaced transversely relative to the longitudinal direction of the yarns or tows so as to obtain a substantially unidirectional sheet (20) that is uniform.

The invention provides a cotton-simulated terylene short fiber. Concave pits are formed on the surface of the cotton-simulated terylene short fiber; and the cotton-simulated terylene short fiber comprises 0-1 percent by weight of calcium sulphate, 1-10 percent by weight of PEG (Polyethylene Glycol) and 1-10 percent by weight of ECDP (Easy Cationic Dyeable Polyester). The invention also provides a preparation method of the cotton-simulated terylene short fiber, comprising the following steps of: slicing the PET; drying a mixture of the calcium sulphate, the ECDP and the PEG and fusing and spinning the mixture into a terylene raw filament at 270-280DEG C by using a profile spinneret; carrying out winding, doffing, balanced bundle collection, wire guiding, pre-stretching and oiling; after primary or secondary stretching, dissolving out partial calcium sulphate in the soaking process by alkali treatment to form mocropores on the surfaces of fibers; and finally carrying out tense heat setting, curling, loosed heat setting, cutting and packaging to obtain the cotton-simulated terylene short fiber. The invention solves the problems that a compound spinning process in the prior art is not only complicated, but also has low yield and makes up the defects that the terylene has poor hydrophilicity and the textile is humid and muggy to wear.

Apparatus for automatically controlling the spreading of a textile sheet made up of a plurality of tows coming from a tow feed module and serving to feed a drive module, the apparatus comprises means for measuring the positions of the longitudinal edges of each tow, means for individually adjusting the width of each tow, means for individually adjusting the position of each tow in a direction perpendicular to a tow advance direction, and digital processor means responsive to said position measuring means to control the adjustment means in such a manner that the textile sheet presents determined width and position.

The invention relates to a method for preparing high-performance polyacrylonitrile-based carbon fiber protofilament through dry spraying and wet spinning, which comprises the following steps: preparing a polyacrylonitrile spinning stock solution; filtering and metering the polyacrylonitrile spinning stock solution after the demonomerization and deaeration; squeezing obtained materials through a spinning jet for forming fine spinning streams for entering a coagulating bath for coagulating forming through an air section; and carrying out drafting, water washing, drying densification, steam drafting and drying hot forming to obtain the high-performance polyacrylonitrile-based carbon fiber. The fiber firstly passes through a section of air layer, and then enters the coagulating bath for spinning forming by a wet method. The fine streams of the spinning solution is in a cylindrical shape after leaving spinneret orifices under the action of the gas-liquid interface tension, a primary cuticular layer is formed, and the cuticular structure is smooth. The method has the advantages of simple process, easy control and relatively low cost. In addition, the method also has the advantages that the spinning speed is high, the production efficiency can be improved, in addition, the surface of the obtained protofilament is smooth, the residual quantity of the solvents is greatly reduced, the quality homogenization degree of the protofilament is improved, and the mechanical property is excellent.

The present invention has an object to provide a fiber-spreading method which can form a thin spread fiber sheet having a large and uniform spread width by uniformly distributing fibers of a fiber bundle having an increased number of fibers. Since a set of regions S_i each including a pair of a fiber-spreading region A_i and an expansion region B_i are arranged in a movable region M set so that the fibers of the fiber bundle can move in the width direction, the fiber-spreading region A_i moving the fibers in the width direction while bending the fibers by letting a fluid pass through the fiber bundle, thereby spreading the fiber bundle to a spread width W_i (i=1, . . . , n), and the expansion region B_i which is set on the upstream side in the feeding direction corresponding to the fiber-spreading region A_i and in which the width of the fiber bundle expands toward the end with movement of the fibers in the width direction in the fiber-spreading region A_i, by performing pre-spreading in which a movement phenomenon in the width direction caused by distribution of the fibers of the fiber bundle occurring in the fiber-spreading region A_i is made to act on the expansion region B_i on the upstream side, the fibers can be uniformly distributed in the fiber-spreading region A_i and the spread width can be expanded to a predetermined width so as to make the thickness uniform.

The invention discloses a one-step preparation method of stranding composite yarn of fully drawn yarn/pre-oriented yarn and a device thereof. The method includes that an FDY filament device is adopted to haul part tow on the back of a spinning box to two clod godet rollers to obtain POY yarn. The left tow is hauled to two hot godet rollers to obtain FDY yarn. The two tows are winded with a speed of 2800-3200m/min after being networked through a network device to obtain multi-strands of stranding composite yarn of fully drawn yarn/pre-oriented yarn. The device is to add two cold godet rollers on the filament device. The network device and a winding device are arranged to the back of the cold godet rollers and two hot godet rollers. The invention shortens the production process, reduces theequipment occupying space, lowers the consumption of the production cost, raw materials and energies and effectively solves the technical problem of finishing the spinning and the stranding in one step. The whole process is stable. The product quality is reliable. The quality defect that monofilament in yarn is easy to appear in a composite yarn product can be completely eliminated. The yield is three times of that of the prior art. And the production efficiency can be improved greatly.

A method is disclosed for fabricating a ribbon yarn, the method including: spreading the yarn such that not more than five filaments are lying over one another, fixing the yarn by forming a matrix of one or more fixatives, winding the fixed yarn, wherein the fixative or fixatives are selected from a group consisting of copolyamides, copolyesters and silicones and also mixtures or blends thereof. Also described is the ribbon yarn and the application of the ribbon yarns for airbag fabrics, as a tire reinforcement and in textile construction.

The invention belongs to the material field, and provides a method for preparing a regenerated cellulose fiber by double solidification bath. The method comprises the following steps: precooling cellulose to a temperature of between 8 DEG C below zero and 12 DEG C below zero in a mixed solution which contains the following compositions in weight percentage: 7 to 10 percent of sodium hydroxide, 4.5 to 7 percent of thiourea, 1 to 10 percent of urea, and 73 to 87.5 percent of water to prepare a cellulose solution with concentration of between 2 and 12 percent through filtering and defoaming; spinning the cellulose solution through a spinning machine, and presolidifying and predrafting the cellulose solution in a first solidifying bath; sufficiently solidifying, regenerating, drafting and orientating the cellulose in a second solidifying bath; washing and drying cellulose; and finally, oiling the fiber through a prepared composite oil solution, and winding the fiber to obtain the regenerated cellulose fiber with excellent mechanical performance.

The invention discloses a preparation method of a fishery polyamide wear-resistant monofilament. The fishery polyamide wear-resistant monofilament comprises polyamide resin, ultra-high molecular weight polyethylene powder, active nano silicon dioxide and PE (polyethylene) grafting maleic anhydride. The preparation method is characterized by comprising the following steps of: mixing polyamide resin, ultra-high molecular weight polyethylene powder, active nano silicon dioxide and PE grafting maleic anhydride; stirring by a stirrer after mixing, heating by a twin screw and granulating into particles by a granulator, mixing and melting the mixed particles through a plastic extruding machine with a mixing head, extruding through a high pressure metering pump, cooling molten and extruded monofilament to put in a drawing machine for drawing with the drawing temperature of 90-95 DEG C and the drawing time of 5-6.5 times, putting the drawn monofilament in a setting machine for setting, carrying out surface coating treatment on the monofilament through an antistatic oil, and winding the set monofilament on a winding machine, wherein the winding tension of 0.06-6mm monofilament is 50-800cN, and the winding speed is 10-200m/min.

The invention discloses a preparation method of regenerative colored polyester fiber, comprising the following steps of: selecting supplementary materials; drying the materials; carrying out spinning preparation and post-spinning extension; evenly extending by two traction rollers under a heating state; rolling the extended raw tows; drying and thermally forming the raw tows; and finally, cutting the dried tows according to customer demands to obtain the regenerative colored polyester fiber with needed lengths. Because the produced regenerative colored fiber is directly spun in the natural color, the traditional color difference is greatly reduced. The obtained product has even color, is colorfast and has high strength, good thermal stability, good elasticity, good wear resistance, low water absorption moisture regain, good acid and base resistance, bio-incising resistance, and the like.

The present invention provides a lenticular lens and method for manufacturing the lens, and in particular when the lens is a lenticular lens web, such that finishing operations (e.g., cutting, laminating, etc.) and various end-use applications of the lens (e.g., labeling) can be achieved or accommodated in-line with the manufacture of the lens web. A lenticular pattern-forming device comprising a housing that is rotatable about a central longitudinal axis is disclosed. The housing has an outer surface having a groove pattern. The groove pattern includes circumferentially and longitudinally extending grooves on the outer surface and the grooves have substantially equal groove widths. The longitudinally extending grooves are substantially parallel with the central longitudinal axis and grooves cover the outer surface of the housing. In addition, the invention further includes a method of using the lenticular pattern-forming device to produce a lenticular lens web, which can be used to make a lenticular image web. The image web can be used to create end products such as wallpaper, banners, labels and the like.

The invention discloses a continuous electrospinning method for polyamide 6/66 copolymer filament yarns. The polymer particles dissolve in formic acid to obtain 10-25% of spinning fluid by mass percent. The bath liquid is prepared by peregal O, using electrospinning method. Under high voltage electrostatic field, fibres of millimicron or submicron size are formed by unstable scourge action and multiple splitting. The fibres are accumulated in the surfactant bath liquid and the residual solvent diffuses in the liquid. After accumulating, the fibres are winded into initial yarns, and then through heating and succeeding stretch, the polyamide 6/66 copolymer filament yarns are obtained. The said polyamide 6/66 copolymer filament yarns formed by fibres with diameter of hundreds nanometer are prepared in the invention, and there in no broken thread during continuous spinning for above 12 hours. At the same time, the invention solves the problem that it is difficult to effectivle improve the structure and performance of fibre through suceeding stretch and heat setting processing by the general electrospinning method.