阅读说明：本技术 一种单轴向纬编织物及制造方法 (Single-axial weft knitted fabric and manufacturing method thereof ) 是由 齐业雄 石艳锦 刘梁森 邵润泽 于 2021-01-29 设计创作，主要内容包括：提出了一种纬向高延伸、经向高强度的单轴向纬编织物及制造方法,主要是通过将衬经纱以平行顺直的方式交错衬于纬平针组织的沉降弧之间,纬平针组织通过织针弯纱成圈,再通过线圈的穿套形成捆绑系统的方式,实现了产品在纬向的高延伸,经向高强度的目的,从而可将该材料用于石油开采用膨胀管材料,满足了膨胀管沿轴向增强、径向高延伸的要求。该产品的制造方法主要包括以下步骤：(1)排针(2)排衬经纱(3)穿编织纱(4)编织。(The single axial weft knitted fabric with high weft extension and high warp strength and the manufacturing method thereof are mainly characterized in that lining warp yarns are staggered and lined between sinker loops of weft plain stitch tissues in a parallel and straight mode, the weft plain stitch tissues are subjected to yarn bending and looping through knitting needles, and then a binding system is formed through threading and sleeving of coils, so that the purposes of high extension and high warp strength of products in the weft direction are achieved, the material can be used as an expansion pipe material for oil exploitation, and the requirements of axial reinforcement and radial high extension of the expansion pipe are met. The manufacturing method of the product mainly comprises the following steps: (1) the lining warp (3) of the row of needles (2) is knitted by the knitting yarn (4).)

1. A uni-axial weft knit fabric comprising: the weft plain stitch as a binding system is a warp inserting yarn system for improving the warp direction high strength, and is characterized in that the warp inserting yarns are inserted between the sinker loops of the weft plain stitch in a parallel and straight mode, and the weft plain stitch is formed by bending yarns by a knitting needle to form loops and then threading loops.

2. A single axial weft knit according to claim 1 wherein the yarns used in the binding system are all textile yarns suitable for flat knitting machines having a fineness of between 32 and 60.

3. A uni-axial weft knit according to claim 1 wherein the yarns used in the warp-backed system are selected from the group consisting of glass fibers, carbon fibers, aramid fibers, ultra high molecular weight polyethylene fibers, high strength nylon, quartz fibers, and combinations thereof.

4. A unidirectional weft knit fabric according to claim 1, characterized in that the manufacturing method comprises the following steps:

step 1, needle arrangement: and selecting a flat knitting machine with a proper machine number, calculating the number of weaving needles according to the width of the single-axial weft knitted fabric, pushing the knitting needles in the non-working position to the working position, and ensuring that the knitting needles can smoothly enter the triangular track during weaving.

Step 2, arranging lining warp yarns: according to the position of the knitting needle at the working position, the lining warp yarn is led out from the bobbin, and is put between every two adjacent needles in sequence after passing through a warp yarn rod and a yarn divider, and the tail end of the lining warp yarn is connected to a drawing and curling mechanism below a needle bed.

Step 3, weaving yarns: the knitting yarn is led out from the yarn cylinder, passes through the tension device and enters the yarn guide.

Step 4, weaving: the binding yarn carrier moves from right to left along with the triangular seat, the knitting needle enters the triangular track, the knitting needle rises and penetrates through the warp insertion yarn gap, the old coil retreats from the hook to the needle rod, the knitting needle starts to descend after finishing the loop withdrawal, the knitting yarn is padded into the knitting needle, the knitting needle continues to descend for the loop bending and the loop forming, and when the knitting needle descends to the lowest point, the knitting of a weft plain stitch binding coil is finished. Then the triangular seat moves from left to right, the operations are repeated, the knitting of two courses of the weft plain knitting is finished, all the mechanisms return to the initial positions at the moment, and the knitting of a new repeated unit is carried out.

Technical Field

The invention relates to a weft knitting technology, in particular to a single-axial weft knitted fabric with high weft extension and high warp strength and a manufacturing method thereof, belonging to the technical field of advanced textiles.

Background

In the middle and later stages of oil exploitation, oil wells are frequently damaged, and the oil exploitation progress is seriously influenced, so that novel effective well repairing materials and techniques are urgently needed. The expansion pipe technology can effectively solve the problems, and the expansion pipe is applied to offshore oil exploitation at present, so that the exploitation cost is greatly saved. As a basic framework material of the expansion pipe, the material is required to have very high strength along the axial direction of the pipe so as to ensure the durability of the material, and the material is required to have very high elasticity in the radial direction so as to ensure that the expansion pipe can be propped open as required, and the material is matched with fiber drilling fluid to stabilize a well hole and ensure that drilling can be smoothly carried out.

The existing uniaxial fabric mainly comprises a warp-knitted uniaxial fabric with a main body layer in a weft direction (0 DEG direction) and an auxiliary layer in a warp direction (90 DEG direction). The warp knitting single axial direction is mainly through knitting binding coil and warp auxiliary layer with reinforcing yarn along latitudinal direction fix in the fabric, though the fabric has along latitudinal direction's high strength's yarn, because the existence of warp auxiliary layer, greatly restricted warp knitting single axial direction fabric along warp elasticity, can not satisfy the performance demand of expanding tube material for oil development.

Disclosure of Invention

The invention provides a single axial weft knitting fabric with high extension in the weft direction and high strength in the warp direction and a manufacturing method thereof, which mainly realize the purposes of high extension in the weft direction and high strength in the warp direction of a product in a mode that lining warp yarns are staggered between sinker loops of weft plain stitch tissues in a parallel and straight mode, the weft plain stitch tissues are bent into loops by a knitting needle, and then a binding system is formed by threading loops, so that the material can be used for an expansion pipe material for oil exploitation, and the requirements of axial reinforcement and radial high extension of the expansion pipe are met.

In order to achieve the purpose, the invention adopts the technical scheme that the single-axial weft knitting fabric is designed, and comprises the following components: the weft plain stitch as a binding system is a warp inserting yarn system for improving the warp direction high strength, and is characterized in that the warp inserting yarns are inserted between the sinker loops of the weft plain stitch in a parallel and straight mode, and the weft plain stitch is formed by bending yarns by a knitting needle to form loops and then threading loops.

Preferably, the yarns used by the binding system can be all textile yarns suitable for being knitted by a flat knitting machine, and the fineness of the yarns is between 32 and 60.

Preferably, the yarn used by the warp lining system can be one of glass fiber, carbon fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, high-strength nylon and quartz fiber, or a combination of the above fibers.

The invention solves the problem that the manufacturing method of the uniaxial weft knitting fabric comprises the following steps:

(1) needle arrangement: and selecting a flat knitting machine with a proper machine number, calculating the number of weaving needles according to the width of the single-axial weft knitted fabric, pushing the knitting needles in the non-working position to the working position, and ensuring that the knitting needles can smoothly enter the triangular track during weaving.

(2) Arranging and lining warp yarns: according to the position of the knitting needle at the working position, the lining warp yarn is led out from the bobbin, and is put between every two adjacent needles in sequence after passing through a warp yarn rod and a yarn divider, and the tail end of the lining warp yarn is connected to a drawing and curling mechanism below a needle bed.

(3) Weaving yarns: the knitting yarn is led out from the yarn cylinder, passes through the tension device and enters the yarn guide.

(4) Weaving: the binding yarn carrier moves from right to left along with the triangular seat, the knitting needle enters the triangular track, the knitting needle rises and penetrates through the warp insertion yarn gap, the old coil retreats from the hook to the needle rod, the knitting needle starts to descend after finishing the loop withdrawal, the knitting yarn is padded into the knitting needle, the knitting needle continues to descend for the loop bending and the loop forming, and when the knitting needle descends to the lowest point, the knitting of a weft plain stitch binding coil is finished. Then the triangular seat moves from left to right, the operations are repeated, the knitting of two courses of the weft plain knitting is finished, all the mechanisms return to the initial positions at the moment, and the knitting of a new repeated unit is carried out.

Compared with the prior art, the fabric has the beneficial effects that:

the invention has the following beneficial effects:

the invention utilizes high-performance yarn as a warp inserting yarn system, soft and thin yarn as a binding and killing system, and adopts a weft plain stitch structure mode to bind the warp inserting yarn through the sinker loop, thereby overcoming the defect that the weft plain stitch structure can not insert warp independently. Meanwhile, the purposes of high latitudinal extension and high longitudinal strength of the uniaxial weft-knitted fabric are realized by utilizing the characteristics of high strength and high modulus of the high-performance lining warp yarns and the characteristics of high extensibility of a weft plain-knitting binding system. The product of the invention has compact structure, good dimensional stability of the fabric, weft elasticity capable of keeping the elasticity of weft plain knitted fabric, and warp strength improved by dozens of times compared with weft plain knitted fabric.

Drawings

FIG. 1 is a schematic view of a construction of a uni-axial weft knit fabric according to the present invention;

in the figure, 1 is a weft plain-stitch binding system, 2 is a warp inserting system, and 3 is a sinker loop.

Detailed Description

The following describes the uniaxial weft knitting fabric of the present invention by means of specific embodiments and with reference to the accompanying drawings. The embodiments are illustrative and not restrictive of the scope of the invention, which is defined solely by the claims. It will be apparent to those skilled in the art that various modifications and substitutions of the machine number, warp density, weft density and width in the embodiments are possible without departing from the spirit and scope of the invention, and the specific parameters defined in the invention should be within the allowable error range.

Example 1: as an example of a specific embodiment, there is provided a uniaxial weft knit fabric comprising: the high-strength polyester weft plain stitch as a binding system is a T300 carbon fiber warp lining yarn system for improving warp direction high strength, and is characterized in that lining warp yarns are staggered and lined between sinker loops of the weft plain stitch in a parallel and straight mode, and the weft plain stitch is formed by bending yarns by a knitting needle to form loops and then threading and sleeving loops. Preferably, the yarn used by the binding system is 75 Dx 2 high-strength terylene. Preferably, the yarns used in the lining warp yarn system are T300-12K carbon fibers. The preparation method of the uniaxial weft knitting fabric comprises the following steps:

(1) needle arrangement: the flat knitting machine with the machine number of 6G is selected, the number of needles is 60, and the needles are pushed to the working position, so that the knitting needles can smoothly enter the triangular track during weaving.

(2) Arranging and lining warp yarns: according to the position of a knitting needle at a working position, the T300-12K carbon fiber is led out from a bobbin, and is put between every two adjacent needles in sequence after passing through a warp beam and a yarn divider, and the tail end of the carbon fiber is connected with a drawing and curling mechanism below a needle bed.

(3) Weaving yarns: the high-strength polyester yarn is led out from the yarn cylinder, passes through the tension device and enters the yarn guide.

(4) Weaving: the binding yarn carrier moves from right to left along with the triangular seat, the knitting needle enters the triangular track, the knitting needle rises and penetrates through the warp insertion yarn gap, the old coil retreats from the hook to the needle rod, the knitting needle starts to descend after finishing the loop withdrawal, the knitting yarn is padded into the knitting needle, the knitting needle continues to descend for the loop bending and the loop forming, and when the knitting needle descends to the lowest point, the knitting of a weft plain stitch binding coil is finished. Then the triangular seat moves from left to right, the operation is repeated in summer, the weft plain knitting two-course knitting is completed, all the mechanisms return to the initial positions at the moment, and the knitting of a new repeating unit is performed.

Example 2: as an example of a specific embodiment, there is provided a uniaxial weft knit fabric comprising: the weft plain stitch as a binding system is a carbon fiber and glass fiber mixed warp lining system for improving warp direction high strength, and is characterized in that lining warp yarns are staggered and lined between sinker loops of the weft plain stitch in a parallel and straight mode, and the weft plain stitch is formed by bending yarns by a knitting needle to form loops and then threading loops. Preferably, the yarns used in the binding system are 48 aramid spun yarns. Preferably, the yarns used in the lining warp system are T300-6K carbon fiber and 1560dtex glass fiber. The preparation method of the uniaxial weft knitting fabric comprises the following steps:

(1) needle arrangement: the flat knitting machine with the machine number of 6G is selected, the number of needles is 60, and the needles are pushed to the working position, so that the knitting needles can smoothly enter the triangular track during weaving.

(2) Arranging and lining warp yarns: according to the position of a knitting needle in a working position, respectively drawing out T300-6K carbon fibers and 1560dtex glass fibers from a bobbin, wherein 30T 300-6K carbon fibers and 30 1560dtex glass fibers are put between every two adjacent needles in sequence after passing through a yarn rod and a yarn divider, and the tail end of the drawing and curling mechanism is connected below a needle bed.

(3) Weaving yarns: the high-strength polyester yarn is led out from the yarn cylinder, passes through the tension device and enters the yarn guide.

(4) Weaving: the binding yarn carrier moves from right to left along with the triangular seat, the knitting needle enters the triangular track, the knitting needle rises and penetrates through the warp insertion yarn gap, the old coil retreats from the hook to the needle rod, the knitting needle starts to descend after finishing the loop withdrawal, the knitting yarn is padded into the knitting needle, the knitting needle continues to descend for the loop bending and the loop forming, and when the knitting needle descends to the lowest point, the knitting of a weft plain stitch binding coil is finished. Then the triangular seat moves from left to right, the operations are repeated, the knitting of two courses of the weft plain knitting is finished, all the mechanisms return to the initial positions at the moment, and the knitting of a new repeated unit is carried out.