JPH07216696A - Spacer fabric and method for preparing it and warp knitting machine for executing this method - Google Patents

Abstract

PURPOSE: To provide a spacer fabric equipped with pile on the surface, which can be manufactured by reducing a material and workload, a manufacturing method therefor and a manufacturing device therefor. CONSTITUTION: The spacer fabric 14 has pile yarn 11 knitted into one side texture 4 only and holding yarn 12 intersecting the above pile yarn 11 knitted into the other side texture 8 only. The pile yarn 11 is drawn out outward. Further, the method for manufacturing such a spacer fabric 14 and a two needle bed-warp knitting machine for executing this method are presented. By such a constitution, the spacer fabric 14 equipped with the pile 19 can be manufactured with lower material expenditure and lower working expenses than heretofore.

Description

Detailed Description of the Invention

[0001]

The invention relates to a spacer fabric according to the preamble of claim 1, a method for producing the spacer fabric according to the preamble of claim 3, and a preamble to claim 10. It concerns a two-needle bed warp knitting machine for carrying out this described method.

[0002]

BACKGROUND OF THE INVENTION Spacer fabrics in which the outer material and the lining are joined by intermediate threads have various application purposes in the fields of engineering, the textile industry, automobile manufacturing, medical fibers, sports clothing, etc. . The spacer fabric can be endowed with a number of desirable properties such as pressure, air permeability or flexibility for moisture transport. Raw materials made of polyester, polyamide, polypropylene and the like can be used in a pure state (state in which they are not mixed with other raw materials), and therefore can be easily recycled.

Heretofore, if a special surface texture was desired, for example when the pile was to be obtained in the form of velours or plushes, an auxiliary layer with such surface texture had to be applied to the spacer fabric. This is stated in general terms in European Patent Application No. 529 671. In this spacer fabric, intermediate yarns are alternately bonded to the outer material and the inner material. Thus
A coating material is obtained which is suitable for automobile seats, armrests and side wall linings.

In the two-needle bed warp knitting machine known from US Pat. No. 4,302,953, the intermediate yarn connecting the front and back fabrics is cut with a knife to obtain two plush fabrics.
Each plush fabric can have a pile loop on the outer surface. This loop is generated by feeding the pile yarn around the knitting needle of the two needle bars that is not used for forming the stitch and subsequently discharging the pile yarn. In such a knitting method, only the second knitting needles form the stitches, so that the density of the final fabric is lowered.

It is an object of the present invention to provide a spacer fabric having piles on the surface which can be manufactured with reduced material and work, a method for manufacturing the spacer fabric, and a manufacturing apparatus for the spacer fabric.

[0006]

According to the present invention, the above-mentioned problems are solved by the spacer fabric defined in claim 1.

With this spacer fabric, the attachment of the auxiliary layer is unnecessary. Rather, the pile yarn is knit with one fabric and is securely locked in the spacer fabric by intersecting the retaining yarn. When pulling out the pile yarn, the distance between the outer material and the inner material is certainly narrowed. However, the properties of the spacer fabric are maintained since it does not fall below the spacing determined by the length of the retaining thread. This spacer fabric not only saves the steps of manufacturing the auxiliary layer and the application step, but also saves considerable weight and material. Further material and weight savings are achieved because the retaining threads, which are important for the compression behavior of the spacer fabric, are knitted only with the other fabric. Omitting the adhesive also saves weight. Moreover, the fabric manufacturer does not have to invest in a bonding machine.

To form a plush or velour,
Alternatively, in order to make the surface uniform, the pile yarn can be shaved as described in claim 2.

For manufacturing such a spacer fabric, the method as claimed in claim 3 is preferred. Since the pile yarn and the holding yarn cross each other and are connected to each other, the distance between the front fabric and the lining when pulling out the pile yarn becomes short as long as the length of the holding yarn allows. As a result, the pile forming portion of the pile yarn is stored between the facing and the backing when manufacturing the spacer fabric. After withdrawal, the compression properties are determined by the holding thread. This method of making piles does not require knitting needles that can be stitchlessly fastened. Rather, the pile yarns and the holding yarns can be fed using all knitting needles.

According to the fourth aspect of the invention, the simplest and most rapid manufacturing method is that the pile yarn is pulled out by the raising process.

According to the steps described in claims 5 and 6,
A velour surface or a plush surface is obtained. Irregularities during brushing are eliminated.

As described in claim 7, it is particularly preferable that the yarns of one yarn system and the pile yarns are knitted in reverse.
For example, the first yarn system is fed so as to have a closed stitch, and the pile yarn system is fed so as to have an open stitch. From this, the effect of splicing can be obtained. That is, the fabric is covered with the stitches of the pile yarn. As a result, the head and legs of the stitch come to the outer surface of the cloth surface, and as a result, they can be gripped particularly easily by the raising device of the independent raising machine.

Advantageously, the retaining thread has an advantageous construction.
It may be a monofilament as described in (1). In that case, the holding thread has a certain elasticity, so that the desired restoring properties are obtained.

By the process described in claim 9, it becomes possible to determine the height of the pile yarn to be drawn.

A double needle bed warp knitting machine as set forth in claim 10 is desirable for manufacturing such a spacer fabric. In this case, it is particularly important that the pile yarn and the holding yarn are knitted with only one fabric and intersect each other.

By design, this intersection claims a guide bar.
It can be most easily achieved when arranged as described in 11.

The desired effect of splicing can be obtained by the control such as the reverse hooking described in claim 12.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the preferred embodiments shown in the drawings.

The two-needle bed warp knitting machine schematically shown in FIG.
It has a front side needle shuttle 1 with a knock over comb 2 and a knitting needle 3 for producing a lining 8 and a back side needle shuttle 5 with a knock over comb 6 and a knitting needle 7 for producing a lining 8.

The guide bars are four with the reference symbols L1 to L4. The guide bar L1 supplies the first yarn system 9 forming the dress material 4. The guide bar L4 is the second thread system that forms the lining 8.
Supply 10. The guide bar L3 supplies the pile yarn 11 so that the pile yarn 11 is knitted only on the outer material 4. The guide bar L2 supplies the holding yarn 12 so that the holding yarn 12 is knitted only with the lining 8, and the holding yarn 12 is a pile yarn at a position 13
The pile yarn 11 and the holding yarn 12 are connected to each other by intersecting with 11.

A relevant knitting organization chart is shown schematically in FIG. In this case, it should be noted that the row of the front side knitting needles 3 is indicated by V and the row of the back side knitting needles is indicated by H. In this embodiment, all yarn systems are fed as tricot knitting, and the guide bars L1 and L3 cooperate only with the knitting needles of the front row V,
L2 and L3 cooperate only with the back row H knitting needles. Since the guide bar L3 is attached to the pile yarn 11 and the guide bar L2 is attached to the holding yarn 12, both yarns intersect in this case. Pile yarn
While the yarn is fed so that 11 becomes the open stitch, the first yarn system 9
The yarn is fed so that it becomes a closed eye. From this, the overlap of both yarn systems is performed in reverse, and as a result, the dress material 4 is covered with the stitches of the pile yarn 11.

As shown in FIG. 3, the spacer fabric 14 thus produced advances in the direction of arrow 15. The raising machine 16 has a raising tool 17 on a rotating support 18.

The raising tool 17 is a pile thread 11 on the upper surface of the dress material 4.
The part is gripped and pulled outwards, thus obtaining the pile loop 19 on the outside, or when this loop is torn off by the tufting device 17, the velour is obtained. The pile loop 19 can be pulled out until the holding yarn 12 comes into contact with the dress material 4. As a result, the volume of the spacer fabric 14 is reduced to a size determined by the length of the holding thread 12. Subsequently, the pile loop 19 is shaved by the shaver 20, so that the velor or the plush remains on the front outer surface of the spacer fabric 14.

In this way, a spacer fabric 21 is obtained, which is shown diagrammatically in FIG. 4, which has a face material 4 and a lining material 8 with a holding thread 12 in between and a pile thread 11 on the outer surface.

Knockover comb 2, 6 spacing (outer material
(Gap between (4) and lining (8)) a, pile yarn 11 and holding yarn 12
Various pile heights can be formed by changing the yarn feeding speed ratio of the. At a predetermined interval a, FIG.
The pile feed speed of the pile yarn 11 is
When the yarn feeding speed is slower than the above, a small pile loop having a height b1 and a holding loop having a large height C1 are obtained. Also,
When the yarn feeding speed of the pile yarn 12 is set higher than the yarn feeding speed of the holding yarn, a high pile height b2 and a low holding loop height C2 are obtained. For example, the loop height C1 of the holding thread 12 is 4 mm, and the pile height after subtracting the estimated 2 mm contraction of the raw material
If b1 is 2mm, the knockover comb spacing must be adjusted to 8mm.

The illustrated embodiments can be modified in various respects without departing from the basic idea of the invention. It is also possible to replace the function of the pile yarn 11 and the function of the holding yarn 12 with each other and pull out the pile loop from the outer surface of the lining 8. It can also be applied to other ground and pile structures such as plain cords, atlas knits or tufts. More guide bars can be used to produce special effects. It is also possible to reduce the volume of the spacer fabric 14 again and pull the retaining yarn 12 outwards in the same manner as outlined for the pile yarn and to treat it like the pile yarn shown in FIG. As the thread material, all known synthetic resins and other materials can be considered. In particular, the holding thread should be constructed as a monofilament with elastic restoring force.

The novel spacer fabric can be applied for the purposes mentioned at the outset and for many other known or novel purposes. It ’s the equipment inside the car,
It is especially suitable as a covering material for furniture and the like.

[0028]

As described above, according to the present invention, a spacer fabric having piles on its surface can be manufactured by reducing the material and the work.

[Brief description of drawings]

FIG. 1 is a diagram showing a knitting region of a two-needle bed warp knitting machine according to the present invention.

FIG. 2 is a diagram showing an example of a knitting organization chart.

FIG. 3 is a schematic view showing a manufacturing process.

FIG. 4 is a schematic diagram showing a spacer fabric finished according to the present invention.

FIG. 5 shows a spacer fabric with short pile threads.

FIG. 6 shows a spacer fabric with long pile threads.

[Explanation of symbols]

 4 ... Outer fabric (fabric) 8 ... Lining (fabric) 11 ... Pile thread 12 ... Holding thread

Claims (12)

[Claims] 1. A spacer fabric comprising a surface and a lining bonded by an intermediate thread and a pile on the surface, wherein a pile yarn (k) is woven only into one of the material (4) of the surface and the lining. 11) and the holding yarn (12) knitted only in the other fabric (8) of the outer material and the lining intersect with each other, and the pile yarn (11) is drawn outward on the surface. Characteristic spacer fabric. 2. Spacer fabric according to claim 1, characterized in that the pile threads (11) are sheared. 3. A method for producing a spacer fabric having a pile on the surface according to claim 1 or 2, wherein at least one first yarn system is a surface material and at least one second yarn system is a backing material. However, in the method in which both are knitted at the same time and the two are joined to each other by an intermediate yarn, the pile yarn (11) knitted only into the fabric (4) of either one of the outer material and the inner material, and the outer material and the inner material of the inner material. The holding yarn (12), which is woven only into the other fabric (8) and intersects the pile yarn (11), is fed as the intermediate yarn, and then the pile yarn portion on the outer surface of the fabric is grasped, A method characterized by being pulled out. 4. A method according to claim 3, characterized in that the knitting step is followed by a raising step, the latter pulling the pile yarn (10) outwards. 5. The pile thread (11) is pulled out outward in a loop shape and is then bristled.
The method described in. 6. Method according to claim 3 or 4, characterized in that the pile thread (11) is torn off when pulled out and then sheared. 7. The yarn of one yarn system (9) and the pile yarn (11) knitted with this yarn are knitted in reverse during overlap. The method according to any one of items. 8. A method according to any one of claims 3 to 7, characterized in that the holding thread (12) is a monofilament. 9. A predetermined distance from the lining (8) to the outer material (4)
When having (a), the height of the pulled-out pile yarn (11) can be adjusted by changing the ratio of the yarn feeding speed of the pile yarn (11) and the holding yarn (12). The method according to any one of claims 3 to 8, characterized in that 10. A two-needle bed warp knitting machine for carrying out the method according to any one of claims 3 to 9, comprising at least one first guide bar for producing a first fabric, What provided at least one 2nd guide bar which produces | generates 2nd cloth, and at least 1 3rd and 4th guide bar which supplies the intermediate thread which couple | bonds 1st cloth with 2nd cloth, The third guide bar (L3) is controlled so as to knit the pile yarn (11) only on one of the first fabric and the second fabric (4), and the fourth guide bar (L2). ) Is the holding thread
It is controlled so that (12) is crossed (13) with the pile yarn and knitted only into the other fabric (8) of the first fabric and the second fabric, which is a two-needle bed warp. Knitting machine. 11. A first guide bar (L1) and a second guide bar.
Of the 3rd and 4th guide bars arranged between (L4),
The third guide bar (L3) is adjacent to the second guide bar (L4), and the fourth guide bar (L2) is adjacent to the first guide bar (L1). 2-needle bed warp knitting machine. 12. The first guide bar (L1) and the third guide bar
12. The two-needle bed warp knitting machine according to claim 10 or 11, characterized in that (L3) is controlled so as to feed yarn in reverse during overlap.