JPS61167064A - Double knitted fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a double knitted fabric that has a soft texture, is bulky and heat retaining, and has excellent sweat absorption and sweat repellency.

(b) Prior Art Various knitted fabrics using multifilament crimped yarns or spun yarns have been proposed as knitted fabrics with improved bulkiness, heat retention, sweat absorption, etc. However, knitted fabrics using, for example, multifilament curly yarns have drawbacks such as the cold feel characteristic of synthetic fibers, lack of heat retention, and poor sweat absorption. In addition, knitted fabrics using spun yarns have excellent heat retention and sweat absorption properties due to the large amount of fluff of the spun yarns, the twisted structure, and the sweat absorption properties of the fibers. Since it depends only on the structure and the hygroscopicity of the spun yarn itself, such as the hygroscopicity of its constituent fibers, its sweat repellency is poor and its sweat absorption is still insufficient. Furthermore, conventional knitted fabrics using such spun yarns have poor unwinding properties during the knitting stage, easy generation and mixing of fluff, and low yarn strength, resulting in poor knitting performance and quality. It also has serious drawbacks in terms of operation, such as a decrease in

(c) Problems to be solved by the invention The present invention solves the drawbacks of conventional knitted fabrics by forming one side of the knitted fabric with a specific composite yarn and the other side with filament yarn. The aim is to provide a double-knitted fabric with a soft feel, bulkiness, heat retention, sweat absorption and repellency, and good knitting properties.

(d) Means and action for solving the problems The present invention includes:
It is composed of burnt short fiber yarn and filament yarn with different heat shrinkability, and the intertwined part where both yarns are intertwined with each other and the parallel joint part where they are paralleled without being substantially entangled are separated in the longitudinal direction of the yarn. This is a double knitted fabric characterized in that one side of the fabric is knitted with composite yarns having alternating layers, and the other side is knitted with multifilament yarns.

As mentioned above, the knitted fabric of the present invention is composed of composite yarn on one side and multifilament yarn on the other side. The surface knitted with strips is called the knitted fabric surface.

In the knitted fabric of the present invention, as shown in FIG. 1, the loops on the surface of the knitted fabric are formed of composite yarn (1), and the loops on the back side of the knitted fabric are formed of multifilament yarn (2), for example. This can be obtained by knitting according to the knitting diagram shown in FIG. That is, from the yarn feeder (G+) to the composite yarn fl
knitting needles (N2), (N4), (Ng
), all the loops on the surface of the knitted fabric (7!z), (I14), (1
&), feed the multifilament yarn (2) from the yarn feeder (Gz), and knit the knitting needles (N+) and (N3).
, (between) the back side loop of the knitted fabric (4) , (A2) ,
form (mu). Further, for example, multifilament yarn (3) is supplied from the yarn feeder (G3), and the entire knitting needle (N+
) to (NG) to form front and back joining loops (T+) to (T6) to complete one complete knitting structure. Since the front and back joining loops are all knitted with tuck knitting needles, only the composite yarn (11) appears on the surface of the knitted fabric, and the back surface and inner layer of the knitted fabric are composed of multifilament yarns (2) and (3). In this case, the yarn (3) fed to the yarn feeder (G3), that is, the yarn for joining the front and back sides, may be the same as or different from the yarn forming the front or back side of the knitted fabric. In addition, in the above example, the front loop of the knitted fabric and the back loop of the knitted fabric are formed, and the front and back joining loops are formed using other yarns. A method of forming a loop on the back side of the knitted fabric with the multifilament yarn (2) and also forming a loop that joins with the back side of the knitted fabric, or a method of forming a loop on the back side of the knitted fabric with the multifilament yarn (2) and further forming a loop that connects with the front side of the knitted fabric, The knitted fabric of the present invention can be obtained by making the front and back joining loops into a tuck knit.

In the knitted fabric of the present invention, the composite yarn fl forming the surface of the knitted fabric
), as shown in Figure 2, consists of a heated short fiber yarn (Y) and a filament yarn (F), with intertwined parts (A) and parallel joint parts (B) alternately arranged in the longitudinal direction of the yarn. has.

Here, the entangled part (A) refers to the convergent burning part (Ya) of the heated short fiber yarn (Y) and the filament yarn (F) due to tension during knitting or heat shrinkage during dyeing. Parallel joints (B) refer to the parts that are directly and relatively firmly intertwined to the extent that they do not separate or shift relative positions. (Yb)
and the filament yarn (F) are partially intertwined, and the focused heating part (Ya) of the heated short fiber yarn (Y) and the filament yarn (F) are superficially joined without mixing, i.e. , refers to parts that are parallel to each other in a substantially parallel state without being substantially entangled. The composite yarn (11) has an extremely high interfiber porosity because it has the intertwined portion (A) and the parallel joint portion (B) as described above, and contains the heated short fiber yarn (Y). In the dyeing process of the knitted fabric, based on the yarn length difference caused by the inherent difference in heat shrinkage between the burnt short fiber yarn (Y) and the filament yarn (F),
Sag is formed and the interfiber porosity increases. Furthermore, the composite yarn (1) has properties and features such as extremely good bundling, less short fiber shedding and shedding, good unwinding properties, and easy handling of the yarn during knitting. are doing.

As mentioned above, the heated short fiber yarn (Y) and the filament yarn (F) that constitute the composite yarn (11) used in the present invention have a difference in heat shrinkability, but the heated short fiber yarn ( When the heat shrinkage rate of Y) is lower than that of the filament yarn (F), the heated short fiber yarn (Y) is preferentially exposed to the surface of the knitted fabric due to the heat treatment during the dyeing process, reducing the interfiber voids. On the other hand, when the heating short fiber yarn (Y) has a higher heat shrinkage rate than the filament yarn (F), The filament yarn (F) is preferentially exposed on the surface of the knitted fabric, and the softness is slightly reduced, but the short fiber yarn (F) is
There is no problem in increasing the interfiber voids due to the differential contraction effect of Y) and the filament thread (F), and the effect of the void formation can be fully exhibited. As for the difference in heat shrinkability between these heated short fiber yarn (Y) and filament yarn (F), it is desirable that the difference in shrinkage rate by hot water treatment is 5% or more. As a result, the above-mentioned phenomenon becomes even more pronounced. Here, the term "thermal shrinkage" includes shrinkage caused by stabilization of the fiber structure by heat treatment and shrinkage caused by crimp development by heat treatment. The shrinkage rate (%) due to hot water treatment is determined by the following measurement method.

That is, 2 n per indicated denier or equivalent denier on the sample.
Apply a load of v/d and measure the length i. Next, after removing the load, a boiling water treatment was performed for 30 minutes, the sample was taken out onto a filter paper and air-dried, and after drying, a load of 2 mg/d per displayed denier or equivalent denier was applied, and the length l was measured. It is calculated using the following formula.

! Note that the converted denier is the indicated number of heated short fiber yarns converted into denier.

The knitted fabric of the present invention has the above-mentioned structure, and when worn with the back side of the knitted fabric facing the desk, it exhibits excellent sweat absorption and sweat repellency. . That is, (1) the sweat adhering to the back side of the knitted fabric can be effectively transferred to the surface of the knitted fabric through the free fuzz of the heated short fiber yarn (Y) of the composite yarn (1) by capillary action. Furthermore, the multifilament yarn (2) on the back side of the knitted fabric has a low water supply property and excellent parallelism between filaments, which facilitates the transfer of sweat to the surface of the knitted fabric. ■The large number of interfiber voids formed on the surface of the knitted fabric can serve as countless seats for temporarily retaining moisture. ■Since yarns with low heat shrinkability are preferentially exposed on the surface of the knitted fabric, fine irregularities are created on the surface of the knitted fabric, which has a high proportion of contact with the outside air and has excellent moisture evaporation. It is thought that the above-mentioned characteristics are exhibited by a combination of the following effects.

From the above point of view, as the heated short fiber thread (Y) of the composite yarn (1) used in the present invention, for example, natural fibers such as cotton, wool, hemp, recycled cellulose fibers, or synthetic fibers having microporous, etc. It is desirable to use threads made of highly hygroscopic fibers, which can exhibit better sweat absorption effects. In addition, the filament yarn (F) and multifilament yarn (2) include polyester, polyamide,
Any synthetic fiber such as polyacrylonitrile may be used, and it may be crimped or non-crimped yarn, but by using crimped yarn, the bulkiness and stretch bank properties of the knitted fabric can be significantly improved. can be improved. The tSS tip yarn may be any material such as a false twisted crimped yarn, a stuffer crimped yarn, a shaped crimped yarn, or a latent crimped yarn.

(e) Examples Example 1゜English cotton count 12'S cotton roving twisted at a twist rate of 300T/M.
1.1%) and polyester multifilament yarn 10
0d/48f (?!Shrinkage rate due to water treatment...11%)
Using this method, fluid treatment was performed using an air injection nozzle for interlacing to obtain a composite yarn having alternating interlaced parts and parallel joint parts.

The composite yarn and polyester multifilament yarn 300
d/60f using a commercially available circular knitting machine (12 gauge.

(30 inch diameter, 36 yarn feeders), knitting was carried out according to the knitting diagram shown in FIG. The composite yarn is fed to the yarn feeder (G1) to form a surface loop of the knitted fabric, and the yarn feeder (Gz), (G9
) was fed with polyester multifilament yarn to form loops on the back side and inner layer of the knitted fabric to obtain a double knitted fabric.

When the above knitted fabric was dyed and finished, the cotton yarns with low heat shrinkage stood out on the surface of the knitted fabric at the parallel joints of the composite yarns on the surface of the knitted fabric, giving it a soft touch, heat retention, sweat absorption, and perspiration. An excellent product was obtained. Furthermore, the product exhibited a natural heathered tone due to the different dyeing properties of the cotton yarn and filament.

Example 2 A yarn made of 60'S worsted yarn with a twist count of 500 T/M (shrinkage rate due to hot water treatment: 2%),
Nylon multifilament false twisted crimped yarn 70d/3
4f (shrinkage rate: 7% due to hot water treatment) and nylon multifilament false twisted crimped yarn 14
0d/68f using a commercially available circular knitting machine (20 gauge,
Example 1. A double knitted fabric was obtained by knitting using the same structure as above to obtain a double knitted fabric in which the front surface was formed of the composite yarn and the back surface and inner layer were formed of the nylon multifilament false twisted crimped yarn. Next, this knitted fabric is dyed and finished, adding to the warm feel, tension and waist of worsted yarn,
A product was obtained that had both the bulkiness and stretch back properties of nylon crimped yarn, as well as excellent sweat absorption and liquid clarity.

(F) Effects of the Invention As mentioned above, the knitted fabric of the present invention is one side of the fabric knitted with a composite yarn consisting of burnt short fiber yarns and filament yarns having different heat shrinkability, and a multifilament yarn. It is a double knitted fabric with the other side knitted, and the synergistic effect of the characteristics of the composite system and multifilament yarn, the yarn form, and the knitted fabric structure provides a soft touch, a warm feeling, bulkiness, and heat retention. In addition, it has excellent sweat absorption and liquid clearness, and in particular, those that have been dyed have the effect of changing the shape of the yarn due to heat treatment during the processing stage, and the above characteristics are even more pronounced. . The knitted fabric of the present invention is suitable for sports clothing and the like.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the double knitted fabric of the present invention, and FIG.
The figure is a + 1 schematic diagram of composite yarn used in the double knitted fabric of the present invention, and FIG. 3 is a knitting diagram showing an example of knitting of the double knitted fabric of the present invention. (11...Composite yarn, (2)...Multifilament yarn. (Y)...Heat short fiber yarn. (F)...Filament yarn, (A)...Interlaced portion. (B)...Parallel interlaced part

Claims (2)

[Claims] (1) Consisting of a heated short fiber yarn and a filament yarn with different heat shrinkability, an intertwined part where both yarns are intertwined with each other and a parallel joint part where the yarns are paralleled without being substantially intertwined are separated. A double knitted fabric characterized in that one side of the fabric is knitted with composite yarns alternately arranged in the longitudinal direction, and the other side is knitted with multifilament yarns. (2) The double layer according to claim (1), characterized in that the difference in shrinkage rate due to hot water treatment between the heated short fiber yarn and the filament yarn of the composite yarn is 5% or more. knitted fabric.