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4349 results about "Weft yarn" patented technology

High-grade flax fabric weaving method based on crystallized and modified flax yarns

The invention provides a high-grade flax fabric weaving method based on crystallized and modified flax yarns. The method comprises the following steps: in the material preparing stage, woven flax spun yarns are subjected to relaxation and winding, so as to form relaxed yarns on cones; the relaxed yarns on cones are subjected to crystallization and modification treatment; the crystallized and modified relaxed yarns on cones are simultaneously subjected to winding, electronic yarn clearing and waxing, so that weaving yarns on cones are obtained; the weaving yarns on cones are subjected to warping according to the quantity of warp yarns; in the weaving stage, flax grey cloth is woven by taking the weaving yarns on cones as weft yarns, the warp yarns after warping as warp yarns, and drawing weft and warp yarns in an air jet loom; in the dyeing stage, the woven flax grey cloth is subjected to hot dyeing or cold dyeing; in the after finishing stage, the dyed flax grey cloth is rinsed, dried, finalized, preshrunk, wound and packaged to form the high-grade flax fabric. According to the high-grade flax fabric weaving method, the bottleneck of wearability of traditional flax fabric is solved, the flax fabric is enabled to obtain the sense of cotton, the production efficiency is improved, the production cost is reduced, and the energy conservation and emission reduction in the production process are realized.

Production method for three-dimensional reinforced warp knitted spaced fabric

The invention relates to a manufacture method for three-dimensional reinforced warp knitted spaced fabric, and the warp knitted spaced fabric is produced on a modified double tricot raschel machine with full weft insertion devices. A main body of adopted raw materials is tows of high-performance fiber such as fiber glass, carbon fiber, aramid fiber, ultra high modulus polyethylene and the like. The manufacture method comprises the following steps: introducing high-performance fiber inserted weft yarns on the whole width of the machine in the X-axis direction through two weft insertion devices arranged on the front and the back of the machine; introducing high-performance fiber inserted warp yarns in the Y direction through guide bars; binding and fixing the inserted warp yarns and the inserted weft yarns through chain stitch or tricot stitch of common or high strength synthetic fiber filament yarns; adopting the high-performance fiber on upper and lower surface layer connecting yarns, ensuring the distance of 5 to 6 cm between the two surface layers, and providing reinforcing fiber in the Z-axis direction; and designing raw materials, densities, arrangement modes and interlayer thickness of the inserted warp and weft yarns of the surface layers and interlayer connecting yarns according to the requirements to form three-dimensional mesh structures with different mesh sizes and specifications. The manufacture method is characterized in that the high-performance fiber is extended and arranged in three-dimensional directions so as to overcome the defects and disadvantages of the prior spaced fabric taken as a reinforced material, and the manufacture method provides an ideal three-dimensional reinforced fabric for production of composite boards with good tensile, bending, shearing and compression properties and shock resistance.

Multicomponent fiber blended fabric and preparation thereof

InactiveCN101275327AComplementary advantage reductionReduce disadvantagesBiochemical fibre treatmentLoomsAntimicrobialWeft yarn
A multi-component fiber blended facing material is disclosed, whose weight proportion of spinning raw material is (the chaine is same with the weft yarn) 11-20% of tencel, 8-12% of ramee, 8-12% of bamboo fibre, 60-65% of terylene short fiber and 0.5-0.7% of conductive fibre. The invention implementing reasonable collocation and assembly of tencel, terylene, bamboo fibre, ramee and conductive fibre, which not only useds the large brute force and sticking dynam characteristic of terylene, but also full utilizes the superior characteristic and favorable wear behavior of tencel, bamboo fibre and ramee, thereby implementing ascendency complementary and inferior position elimination of various fibres, and meanwhile the conductive fibre has better and longer electrostatic resistance effect in the fibre blended yarns. The facing material has superior characteristics of moisture absorption, ventilating, electrostatic resistance, sticking, sliding, embonpoint hand feeling, good drapability, flokkit and pilling resistance, good model keeping performance, antimicrobial, etc. The invention has reasonable technique, resolve difficult problem of spinning and dyeing, and establish hardness foundation for the amenity and high-grade of the chemical fabrics facing material.

Weft-filled decorative fabrics in three-layer structure and production process thereof

InactiveCN101649522AStrong three-dimensional flower shapeObvious permanent bump effectWoven fabricsSurface layerEngineering
The invention discloses weft-filled decorative fabrics in a three-layer structure and a production process thereof. One of plain weave or twill weave is adopted as basic weave in a surface layer and aliner layer; warp yarns and weft yarns on the surface layer and the liner layer are woven into two-layer fabrics; 3/3 warp overlapped plain weave single-layer grid embedded strip yarns and 2/2 weft overlapped plain weave single-layer grid embedded strip yarns are respectively embedded and woven in an alternative arrangement mode on the surface layer and the liner layer in the warp direction and the weft direction; weft suspended filling yarns are woven between the surface layer texture of and the liner layer texture; the number R of full-texture circulating warp yarns of the whole fabrics satisfies an equation: R=10-16; and the decorative fabrics in the two-layer texture weft-filled three-layer structure are woven. The whole fabrics integrally have three-dimensional grid effect in a two-layer texture triple structure; under the supporting action of filled wefts in the weft direction, two-layer bag-shaped grids have permanent obvious swelling effect and form an air layer with a thickness of 1.2-1.8 mm in the fabrics, and the air layer has favorable functions of heat insulation, heat maintenance and sound shielding. Accordingly, the novel household decorative fabrics are ideal.

Prediction method for fatigue life of complex braided structure ceramic-based composite material

The invention discloses a prediction method for the fatigue life of a complex braided structure ceramic-based composite material.The prediction method comprises the steps that the fatigue performance under a cycle number and the fiber failure percentage under the cycle number are calculated; the relationship between the fiber failure percentage and a fiber failure critical value is determined; the unit-cell scale fatigue performance is calculated to obtain the maximum strain epsilon'max under the cycle; the relationship between the maximum strain epsilon'max and the maximum failure strain epsilonmax is determined; a fatigue life curve of the material is obtained.According to the prediction method, a microscale model taking account of fibers, a base body and pores and a unit-cell multi-scale prediction model taking account of warp yarn, weft yarn and holes are presented and overcome the defects that a micromechanical method cannot be directly applied to the braded material with the complex structure, and a macroscopic phenomenological method depends on a large quantity of tests and only can achieve prediction on the fatigue life of a special material, macromechanics and micromechanics are combined, a micromechanical stress strain field of a complex braided structure is supplied, and the application range of the material is widened while the fatigue life curve of the material is precisely predicted.

Machine side layer weave design for composite forming fabrics

A machine side layer weave design for use in woven composite fabrics, particularly papermakers forming fabrics having differing weave designs on each planar surface is provided. The composite fabric is comprised of two sets of weft yarns interwoven with at least one system of warp yarns. A first set of weft yarns is interwoven with the at least one system of warp yarns to form the paper side layer, while the second set of weft yarns is interwoven with the at least one system of warp yarns to form the machine side layer. In each repeat of the machine side layer weave design, at least 50% of the warp yarns pass under two adjacent weft yarns on the machine side of the fabric to form a double warp knuckle, and each double warp knuckle is bounded on either side by a single warp knuckle formed on each of the first and second weft passed under by the double warp knuckle. Further, in each repeat of the weave, each weft yarn is passed under by two adjacent warp yarns to form two adjacent single warp knuckles. In one embodiment, all of the warp yarns form double warp knuckles; in an alternate embodiment, 50% of the warp yarns form double warp knuckles. The knuckles are evenly distributed across the machine side surface so as to minimize any propensity for guiding. The machine side layer weave design of the invention is suitable for use in any composite fabric and is effective in minimizing or eliminating fabric edge curl, a problem common in fabrics of this type.

Normal reinforced 2.5D fabric and weaving method thereof

InactiveCN101775683AImprove integrityImprove longitudinal compressive performanceWoven fabricsEngineeringWeft yarn
The invention discloses a normal reinforced 2.5D fabric and a weaving method thereof. The fabric comprises a warp yarn system and a weft yarn system, wherein the warp yarn system and the weft yarn system are interwoven to form a layer-layer-corner interlocking structure. The fabric is characterized by also comprising a normal yarn system, wherein the normal yarn system is perpendicular to the interwoven warp yarn system and weft yarn system, penetrates through the thickness of the fabric, and is held by the adjacent warp yarn and weft yarn, thereby forming the normal reinforced 2.5D fabric. The fabric weaving method is realized in a way that: a technique normal yarn system is added based on the prior weaving method of the 2.5D fabric; and the normal yarn is perpendicularly led between every two adjacent warp yarn rows by a yarn leading device in the weft yarn direction in a certain leading way, penetrates through the thickness direction of the fabric and is held by the adjacent weft yarn rows, thereby weaving the 2.5D fabric. The method comprises the following steps: arranging yarn initially, making a shedding motion, leading in the weft yarn, leading in the normal yarn, making a shedding motion for the second time, leading in the weft yarn for the second time, and repeating the last three steps, thereby obtaining the normal reinforced 2.5D fabric.

Three-layer fabric and tatting technique thereof

The invention discloses a three-layer fabric and a tatting technique thereof. Side openings at both sides of the cloth width of the three-layer fabric are tatted into a single layer, a surface layer and a liner layer comprise foundation tissues and jacquard or pattern tissues, the foundation tissue of the surface layer is tatted by surface warp and surface weft, the jacquard or pattern tissue is tatted by liner warp and liner weft, the foundation tissue of the liner layer is tatted by the liner warp and the liner weft, the jacquard or pattern tissue is tatted by the surface warp and the surface weft, and a middle layer comprises a layer of middle weft and is clamped and fixed by a binding tissue in a complete tissue; at the junction of the foundation tissue and the jacquard or pattern tissue, surface-liner connection and liner-surface connection are carried out to form the binding tissue; the tatting technique comprises seven procedures of fabric design, warp beaming, loom tacking, tatting, desizing, softening and water washing, adopts a set of surface weft yarn system, a set of middle weft yarn system, a set of liner weft yarn system and two sets of warp yarn systems for tatting,and the tatting sequence is the surface firstly, the middle secondly and the liner thirdly or is reverse; and the invention solves the problem that the prior art is difficult to tatt a fabric which can be directly used for producing an air-conditioning bedding and has the required thickness, and has obvious use value and economic value.
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