JPS6328226Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a double-sided blanket used for rugs, blankets, bedsheets, shawls, etc.

Conventional technology After knitting two base fabrics in a double layer, top and bottom, and connecting them with pile threads, the pile threads connecting the upper and lower fabrics are cut at the center to create a pile surface. Double warp knit pile fabrics, which are manufactured in two layers facing each other, are used for rugs (cut pile), chair upholstery (sheet fabric), and the like.

In the knitting process, the pile yarn 18 is pulled out from the beam and fed through the reed hole 19 so as to alternately connect the needles 20 for the upper fabric and the needles 20' for the lower fabric to form chain stitches forming the base fabric. 21 and the continuous yarn 24 of the joint stitch 23 that wraps and connects the wales of the chain stitch 21.

Meanwhile, the pile yarn 18 has a reed hole 19 on the upper fabric needle bed 2.
0 and the lower cloth needle bed 20' at high speed and undergo intense vibration and tension changes, and when bending and passing through the reed hole 19, needle 20, and sinker 25 that move vertically or horizontally. It is strongly rubbed, and when passing through the previously formed stitch 26 to form a new stitch, it also rubs strongly against the stitch 26.

Therefore, the pile yarn 18 is worn out during the knitting process, becomes fluffy, and becomes clogged, which in turn causes yarn breakage.

For this reason, the pile yarn 18 is made of filament yarn or strongly twisted spun double yarn, which is less likely to wear out.General spun yarns other than strongly twisted spun yarn are not used as the pile yarn because they tend to cause tension unevenness. .

The fiber length of the raw cotton (staple fiber) used in spun yarn is less than 15 cm, and is usually around 10 cm.

Problems that the invention aims to solve Since spun yarn is spun by blending several lots of raw cotton, color differences between lots and color spots within a lot are averaged out, and color spots that continue long in the wale direction on the pile surface are created. In addition, even if there is an extreme color difference between lots, a heathered pattern will appear, or by mixing several colors, the hue of the entire pile surface will become deeper, producing better results.
Such color differences and color spots in raw cotton hardly cause any appearance defects on the pile surface.

In addition, each short fiber of the raw cotton in the spun yarn has a length L from one end 27 to the other end 28 of the U-shaped cut pile at the center cut when forming the cut pile, that is, twice the pile length H. Sa(L=
2H), and the short fiber end portion 30 has a length less than twice the pile length H (L'<2H), and the short end portion 30 has a tip 31. On the other hand, the tip 32 of the intermediate portion 29 becomes the tip of the cut pile 11 and appears like a bristle on the pile surface 13. Since the fibers have different lengths, the pile surface 13 has a nice texture similar to natural fur, which is made up of downy hair and matted hair.

On the other hand, some terminal portions 30 of short fibers whose length is less than twice the pile length H are cut even shorter into lengths less than or equal to the pile length H (L″<H) 3
3 also exists. The terminal part 33 is extremely short like that.
The hair is not secured to the base fabric by the chain stitch 21, but is merely interposed in the cut pile, and when the pile surface is rubbed, it comes out and becomes loose hair (waste hair/waste hair). I get used to it.

Therefore, the loose hair 33 must be removed by thorough brushing after center cutting, but since the spun yarn used for pile yarn is highly twisted, the brushing process must be repeated over and over again. This makes the finishing process after knitting inefficient, and firstly, loose hair is loss of pile yarn, so it is uneconomical to have a lot of loose hair.

In addition, since the short fibers of highly twisted spun yarns are twisted and set, it is difficult to open the yarn into bulky yarns, and a pile fabric with a good texture cannot be obtained.

In this respect, the filament fibers constituting the filament yarn are of the same length as the filament yarn and are continuous for a long time without interruption, and there is no possibility of yarn breakage during the knitting process, and there is no need for twisting. Since the filament fibers are intertwined to form a single filament yarn, the length of the filament fibers that are center-cut to form the cut pile 11 is 2 of the pile length.
The brushing process can be as simple as straightening the pile because the hair is straightened at a constant double (2H), therefore no loose hair 33 is generated, and the hair is opened immediately by the center cut.

On the other hand, since the length of all the fibers contained in the cut pile is constant, the pile surface does not have the texture of a natural blanket with long and short fluff, and the pile surface does not have a texture similar to that of a natural blanket. Since a single filament yarn is not produced by combining them, if there is a color spot in the spinning rod, it will create a color spot warp defect that continues uninterrupted in the wale direction. A lot with uneven color cannot be used for pile yarn, and if it is discovered after knitting, all the pile fabrics in that lot will be defective. Furthermore, filament fibers must be carefully spun and drawn so that they are continuous forever, so that they do not break in the middle and that uneven spinning or drawing occurs, so even if they are cut into short fibers. Another problem is that the manufacturing cost is relatively high compared to good quality raw cotton.

Purpose of the invention The present invention has the respective advantages of conventional double warp knit pile fabrics made of filament yarns and double warp knit pile fabrics made of strong twist spun yarns, eliminates their drawbacks, The double-sided warp knitting method efficiently uses a double-sided warp-knitted fabric that has no flaws, has a bulky feel similar to natural fur, and has a fur-like feel on the backstitched side, with less shedding. The purpose is to obtain.

Structure of the invention The double-sided covered fabric 15 according to the invention is made by opening the pile surface 13 of the double warp knitted pile material 12 which has been center-cut to form the cut pile 11, and by raising the backstitch surface 14. , the pile yarn 18 has a fiber length of 50% by weight or more of short fibers of 20
The filament fibers 17 are twisted and tied into a sliver 16 of ~100 cm, and the filament fibers 17 account for the total denier of the yarn 18.
The denier ratio of is 5% or less, and the sliver 1
The number of twists of filament fiber 17 for 6 is 2
It is characterized by being less than 3 times/cm.

The sliver 16 is a fiber bundle obtained by blending 50% by weight or more of staple fibers with a fiber length of 20 to 100 cm, aligning them through a spinning card, and going through a drafting process.
There are 1 denier fibers with a fiber length of 25 to 40, 5 denier fibers with a fiber length of 25 to 40 cm, 20 denier fibers with a fiber length of 30 to 45 cm, and 30 denier fibers with a fiber length of 35 to 50 cm. Filament fiber 17 made by mixing several types (at least three types) of raw cotton with different thicknesses ranging from 1 to 30 denier and tying them together at 50 cm.
It is best to use one or several strands of the same material as the raw cotton and one of the thicknesses of the above raw cotton so that the total denier is around 20 denier.More preferably, The number of twists for the sliver is preferably 1 twist/cm or less. Blending several types of lots with different fiber lengths in this way is necessary to improve the drafting properties of the wrap (fiber bundle) that exits the spinning card.

The pile surface 13 is opened with a brush roller 34.
Further, the backstitch surface 14 is raised using a raising roller 35 wrapped with clothing, and in that case, the hair may be opened and then the raised process is performed, or vice versa. Alternatively, if necessary, the backstitch surfaces of the front and back sides of the original fabric can be preliminarily brushed.
Alternatively, the pile surface may be treated with a hair raising roller (so-called hair splitting treatment).

The center cut has a belt cutter 3 that rotates endlessly from one edge of the raw fabric 12 to the other edges.
6 is used, and the center cut may be performed at the raw fabric outlet of the warp knitting machine, or may be performed separately after the raw fabric is taken out from the warp knitting machine.

Effects of the invention According to the invention, it has the advantages of the conventional double warp knit pile fabric made of filament yarn and double warp knit pile fabric made of strong twist spun yarn, and has the advantages without the respective disadvantages. It has a good texture with bulky hair like natural fur, and the backstitch side also has a fur-like feel, and the double warp knitting method uses double warp knitting to prevent shedding or loose hair. can be obtained efficiently. That is: (1) The fiber length of most of the short fibers in the sliver 16 constituting the pile yarn 18 is 20 to 100 cm, which is significantly longer than that of the raw cotton of the spun yarn conventionally used for pile yarn; It is only lightly bundled by a small amount of filament fibers 17 whose denier ratio is less than 5% of the total denier of 18, and is not set in a strong twist. After the hair is opened, the fibers in the cut pile 11 are loosened one by one by the subsequent hair opening process, and the fibers in the cut pile 11 are unraveled one by one and become bulky.
3 is formed. On the other hand; (2) Since the short fibers that make up the majority of the pile yarn 18 are mixed, even if there are spinning lot irregularities or other color irregularities in the raw cotton, they are averaged out, and the color that was conventionally seen on the pile surface of filament yarn is reduced. There is no occurrence of irregular warp defects, and there is no inconvenience that all the pile fabrics in the entire pile yarn lot will be defective. (3) Due to the center cut, the short fibers in the sliver 16 have an intermediate portion 29 with a length twice the pile length H (L=2H), and a length shorter than that (L′<
2H) is cut into the terminal part 30, and
Since the sliver 16 is composed of various short fibers with different fiber lengths and thicknesses, the cut pile 11 is composed of various long fiber pieces. A pile surface 13 with a soft texture close to that of natural fur is formed. (4) The short fibers in the sliver 16 are significantly longer than those in conventional spun yarns, so each short fiber has two short end portions 30 at both ends and a large number of intermediate portions 29. The ratio of the intermediate portion 29 to the total number of pile fiber pieces made from one short fiber is greater than that of conventional spun yarn, and therefore, the degree of occurrence of loose hair 33 is also relatively high. (5) The tips 31 of the short fibers that become the end portions 30 due to the center cut not only protrude from the pile surface 13, but also from the backstitch surface 14.
The filament fibers 1 exist in the form of fluff, and the pile yarns 18 are untwisted and bind the sliver.
Since the number of twists in 7 is only 1 to 2 times/cm,
(6) During the knitting process, the pile yarn 18 is violently vibrated by the reed holes 19, is strongly rubbed against the needles 20, sinkers 25, etc., passes through the stitches 26, and is knitted. However, most of the short fibers are in the reed hole 1.
Since the length is 20 cm or more, which is much longer than the distance from the trick bar 37 to the trick bar 37 (base fabric), it can pass through these continuously without clogging, just like filament yarn, and is efficient without causing thread breakage. organized into.

(7) The back stitch surface 14 has a bulky fluff due to the nap, and the fluff 38 becomes entangled with each other, so the cut pile 11 is integrally joined with the chain stitch 21 and the joining stitch 23 at the root, increasing the resistance to pulling out the pile threads, and thus improving the latex. The double-faced carpet 15 of the present invention, which is finished without applying backing adhesive finish such as the like, can be used as a carpet as it is, and since no adhesive backing process is required, it is flexible and bendable, making it easy to pack and store. A carpet that is easy to store can be obtained.

(8) Since the pile yarn 18 is made of short fibers, the production cost is lower than that of filament yarn, which is spun and drawn in a long continuous manner without any irregularities, and the pile surface is lower than that of conventional spun yarn. The double-sided fabric 15 of the present invention is efficient and economical because the hair opening process 13 and the raising process on the backstitch surface 14 are simplified, and it can be knitted at high speed without causing yarn breakage, similar to filament yarns. Furthermore, as mentioned above, it is flexible and has a good texture similar to natural fur without generating loose hairs, so the present invention is extremely practical and convenient.

[Brief explanation of the drawing]

FIG. 1 is a partial enlarged cross-sectional view of a double-sided blanket according to the present invention, and FIG. 2 is a process diagram showing a partially connected side view of the cross-sectional side of a manufacturing apparatus for a double-sided blanket according to the present invention. 11...cut pile, 12...original fabric, 13...
...Pile, 14...Back stitch, 15...Double-sided cloth, 16...Sliver, 17...Filament fiber, 18...Pile yarn, 19...Reed hole, 20...Needle, 21...Chain stitch , 22
... ground thread, 23 ... joint stitch, 24 ... continuous thread, 2
5...Sinker, 26...stitch, 27...one end,
28...Other end, 29...Intermediate portion, 30...Terminal portion, 31...Tip of terminal portion, 32...Tip of intermediate portion, 33...Free hair, 34...Brush roller, 35...Nursed hair Roller, 36...belt cutter, 37...trick bar, 38...fluff.

Claims (1)

[Scope of Claim for Utility Model Registration] In a double-sided cloth 15 in which the pile side 13 of the double warp knitted pile material 12 which is center cut to form the cut pile 11 is opened and the backstitch side 14 is raised, the pile yarn is 18: (1) Fiber length of 50% or more short fibers is 20 to 100 cm
filament fiber 17 to sliver 16
(2) The denier ratio of the filament fibers 17 to the total denier of the pile yarn 18 is 5% or less, and (3) the filament fibers 1 to the sliver 16 are
7. A double-sided blanket characterized by having a twist number of 2 twists/cm or less.