JPH0576283B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a warp-knitted tape used for female surface fasteners, and in particular to a method for manufacturing a warp-knitted tape for use in female surface fasteners, and in particular for the production of warp-knitted tapes for use with engaging elements such as hooks and pine looms of male surface fasteners. The present invention relates to a method for manufacturing a warp-knitted tape for hook-and-loop fasteners having pile loops with good properties.

Prior Art A conventional method for manufacturing a warp-knitted tape for surface fastening is, for example, as shown in Japanese Patent Publication No. 57-381.
Using a warp knitting machine equipped with one needle bed, chain yarn A and insertion yarn B forming the ground texture are knitted by being thrown over the needles when the needles rise every other time. A warp-knit pile fabric for surface fasteners was manufactured by knitting the fabric by overlapping each time it was raised, thereby raising it above the stitch row to form a pile D. (Figures 6 and 7
(See figure) Problems to be Solved by the Invention Warp-knitted tapes for hook-and-loop fasteners manufactured using conventional manufacturing methods have low engagement strength because each pile loop is formed independently. It is easy to collapse or deform, and the shape retention is not sufficient, and there are problems with the degree of engagement with the hook of the male surface fastener and the engagement element in the form of a mushy loom.

Therefore, the present invention provides a method for manufacturing a warp-knitted tape for hook-and-loop fasteners that solves the conventional problems and has high engagement strength and has pile loops in a good shape that are less likely to collapse or deform. It is intended to.

Means for Solving the Problems In order to solve the problems of the conventional art, the present invention uses a warp knitting machine equipped with two rows of needle beds, and as shown in FIG. In the method of manufacturing a warp-knitted tape for hook-and-loop fastener by knitting a pile structure and a horizontal insertion structure on the other needle bed, in the pile structure, each pile loop P, P knitted along each wale. ₁ , P ₂ ...but
It is knitted so as to intertwine with the front and rear pile loops P, P ₁ , P ₂ ... to form a pile loop row linked in the longitudinal direction, and in the horizontal insertion structure, each pile loop P, P of the pile loop row ₁ , _P2 ...
The horizontal insertion yarn 6 made of water-soluble fibers is inserted and knitted under the pile loops P, P ₁ , P _{2 .} . . to knit the warp-knitted tape, and then the water-soluble The weft insertion yarn 6 made of fiber is removed from below each pile loop P, P ₁ , P ₂ . . . by dissolving it to form an engaged element of the female surface fastener by the chained pile loops. As a result, it is possible to manufacture a warp-knitted tape for hook-and-loop fasteners in which the pile loops have strong engagement strength and high engagement properties.

Example Next, embodiments of the present invention will be described based on the drawings.

The method for producing a warp-knitted tape for surface fasteners of the present invention is to knit a warp-knitted tape for surface fasteners (hereinafter simply referred to as tape) using a double ratchet knitting machine equipped with two rows of needle beds, and a pile loop When knitting, a yarn made of water-soluble fibers such as polyvinyl alcohol fibers is knitted as a horizontal insertion yarn below the pile loop to prevent deformation of the pile loop, and after knitting the warp knitted tape, to maintain the shape. A warp-knitted tape for hook-and-loop fasteners having pile loops, which are engaged elements with high engagement properties, is produced by dissolving and removing the wefted weft-inserted yarns made of water-soluble fibers through a blanching process. .

Figure 1 shows the tape immediately after knitting and before dissolution treatment.
This is an enlarged perspective view of a part of it. Regarding the ground structure, in order to make it easier to understand the condition of the threads of the pile loop P and the horizontally inserted threads 6, only the two end wales are shown as threads. The state is shown and other parts are omitted. There are two types of weft insertion threads: those inserted below the pile loop and those inserted into the ground structure.The former is called the weft insertion thread 6 at the end, and the latter is called the ground weft insertion thread 5 to distinguish it. .

First, a warp-knitted tape for hook-and-loop fasteners manufactured by the manufacturing method of the present invention will be described.

FIG. 2 is a tissue diagram of the final product tape after the horizontal insertion thread 6 has been dissolved and removed, and shows a wide pile section 1 in the center, ears 2 at both ends, and needles. The positions of back needle B and front needle F are shown alternately every other course.

The central pile portion 1 is knitted by pile yarns 3, ground yarns 4, and ground weft insertion yarns 5, and the pile loop P is formed by the pile yarns 3. This pile yarn 3 has a chain stitch (link number 2-0/0-2/2-0/0-2 or 2-0) as shown in Fig. 3A.
0/0-2/0-2/2-0), and the back needle B knits the ground yarn part together with the ground thread 4 and the ground weft insertion thread 5, and the front needle F knits the pile loop P. , Figures 1 and 5
The following course pile loop P ₁ as shown in the figure
The pile loops are intertwined in a double chain stitch pattern and connected in a chain in the wale direction to form a row of pile loops. This pile loop P is formed by passing the sinker loop of the chain stitch over the front needle F, so the length of the loop formed is always constant, and it is formed by intertwining with the front and rear pile loops, so that the pile loops are connected. In addition to increasing the joint strength, shape retention is improved by supporting the pile loops by the front and rear pile loops. As shown in Fig. 1, the pile loop is integrated with the ground thread 4 to knit a chain loop to form the ground thread portion, but the ground weft insertion yarn 5 is inserted into the stitches of this chain stitch loop. hand,
This is knitted so as to be held down by the sinker loop of the ground yarn 4, thereby preventing the pile loop from slipping out.

Next, to explain the tape before dissolving and removing the horizontally inserted yarn 6, the ground texture and pile texture remain the same before and after the treatment, but when knitting the pile texture with the front needle, the horizontally inserted texture is added to this. As shown in FIGS. 1 and 5, the weft insertion yarn 6 is inserted below the pile loop and knitted.

Figure 4 shows the horizontal insertion section (link number 4-4/0-0/4-4/
8-8), two to four horizontal insertion yarns 6 are knitted below the pile loop as shown in the perspective view of FIG. This horizontal insertion thread 6
The thread acts as a presser thread when knitting pile loops, and when knitting pile loops, the pile loops are pulled into the ground yarn section, and when the pile loops are pulled out from the front needle, they shrink, causing the knitted pile to become loose. This is woven to prevent the shape of the loop from deforming. Then, after knitting the tape, a blanching process is performed to dissolve and remove the horizontally inserted yarns 6 from the water-soluble fibers, thereby producing a tape having a bridge-like pile loop formed by a chain of pile loops that is uniform and high in height without collapse or deformation. This is how it was done. FIG. 5 is a side view of the part where the two lateral insertion threads 6, 6 are inserted below the pile loops, and as shown in FIG. The number of threads 6 is different.

It can also be applied to forming pile loops of tapes made stretchable by weaving elastic yarns of covered yarns such as synthetic rubber or spandex yarns in the warp direction of the tapes by warp insertion knitting.

The ears 2, 2 placed at both ends of the tape are
It is a narrow 3-way knit, as shown in Figure 2, and is knitted with ground threads 4 and ground weft insertion threads 5. In order to prevent curls at the selvedges, it is knitted with chain stitch or tricot stitch. It is best to thicken it by adding stitches. These ears 2, 2 have no pile loops and serve as sewing parts for attachment to clothing, bags, etc.

Effects of the Invention The present invention provides a manufacturing method as described above, in which each pile loop knitted along each wale by a pile structure is intertwined with the preceding and following pile loops to form a row of pile loops linked in the longitudinal direction. The fabric is knitted in such a way that it is formed, and horizontally inserted yarns made of water-soluble fibers are knitted below each pile loop, and the horizontally inserted yarns are dissolved and removed after tape knitting, so the front and rear pile loops are intertwined and supported. By knitting the pile loop while knitting the horizontally inserted yarn below the pile loop, the shape retention is further improved, and a pile loop with a uniform shape of pile loop height is formed. Since the weft-inserted yarn can be dissolved and removed by simple processing after tape knitting, it does not pose any problem when engaging with engaging elements such as the hook or pine loom of the male surface fastener. This is a very excellent manufacturing method, as it allows the fabrication of a hook-and-loop fastener shaped knitted tape with pile loops with high engagement strength and excellent engagement properties in a simple manner.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of a part of the tape during tape knitting in the manufacturing method of the present invention;
The figure shows the organization chart of the tape after the weft-inserted yarn has been dissolved and removed. A schematic side view showing the state of the weft-inserted yarn in the pile loop, and FIGS. 6 and 7 are side views showing the organization chart and the pile loop of a known warp knitted tape for surface fasteners. 1...Pile part, 3...Pile yarn, 4... Ground thread, 6...Weft insertion yarn, P, _P1 , _P2 ...Pile loop.

Claims (1)

[Claims] 1 Using a warp knitting machine equipped with two rows of needle beds, one needle bed knits the ground weave, and the other needle bed knits the pile weave and horizontal insertion weave to produce a warp knitted tape for surface fasteners. In this method, in the pile structure, each pile loop P, P _{1 , P 2 .} In addition, in the horizontal insertion structure, below each pile loop P, P ₁ , P ₂ ... of the pile loop row,
After the horizontal insertion yarn 6 made of water-soluble fibers is inserted and knitted to knit a warp-knitted tape, the horizontal insertion yarns 6 made of water-soluble fibers are inserted and knitted below each pile loop P, P ₁ , P ₂ ... A method for manufacturing a warp-knitted tape for a surface fastener, characterized in that the yarn 6 is removed by dissolving to form an engaged element of a female surface fastener made of chained pile loops.