JPS63164989A - Spun like 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 (Industrial Field of Application) The present invention relates to a spun tMm fabric that has many minute loops protruding on the surface of one knitted fabric and has a downy feel, as well as a full and warm feel. It is.

(Prior technology) Conventionally, there has been a technology to produce knitted fabrics with a spun-like feel using yarn in which single filaments of multifilament yarn are entwined to form loops or slacks on the yarn surface, or to create a knitted fabric with a spun-like feel. As a yarn for obtaining woven or knitted fabrics with
Composite yarns obtained by subjecting two filament yarns to fluid treatment have been proposed.

For example, in Japanese Patent Publication No. 58-12949.

A loop yarn consisting of a core yarn and a decorative yarn with different single yarn deniers and a boiling water shrinkage rate of 10% or more is knitted so that 50% or more of all stitches are convex with respect to other stitches, and the knitted fabric is brushed. This paper proposes a method for producing flannel-like raised knitted fabrics.

However, the knitted fabric obtained by this method is often subject to restrictions in selecting the &I structure in order to satisfy the necessary conditions for convex knitting, and is inferior in versatility. Furthermore, the loop yarn is shrunk during the dyeing process to prevent the stitches on the raised side from being exposed, so the eyelets become tighter. As a result, the voids between the filaments of the yarns constituting the second stitch or stitches are reduced, resulting in a disadvantage that the fullness and flexibility of the nine-knit fabric tend to deteriorate.

Furthermore, in JP-A-55-76128, the winding portion is made up of two filament yarns having different elongations, and the high elongation yarns are wound in an alternately twisted manner to form an outer layer portion. proposed a composite winding yarn in which interlaced core parts formed by mixing and crossing each other and loops and slacks exist on the yarn surface. The resulting knitted fabric.

Since the yarn has a structure in which the yarn has winding portions and intertwined core portions alternately in the yarn axis direction, there are few voids between the filaments. Therefore, a uniformly large number of loops on the sheath thread.

Compared to knitted fabrics using bulky core-sheath yarns that form slack and have high air permeability, they have the disadvantage of being inferior to soft, puffy and warm sensations.

(Problems to be Solved by the Invention) The present invention solves the drawbacks of the prior art, and its purpose is to provide &W with a large number of fine loops protruding on the surface of the ground, giving it a downy hair-like feel. Our goal is to provide span 1) & I fabrics that are rich in volume and warmth.

(Means and actions to solve the problem) i.e. 2
The present invention consists of 9 synthetic fiber multifilament yarns, and has a core-sheath having a loop index of 80 or more at a height of 0.5f1 or more from the yarn surface and a loop index of 20 or less at a height of 2.0fi or more. A knitted fabric in which the structural yarn constitutes 50% or more of the number of surface stitches, and the stitch length J(xi) of the core-sheath structural yarn is 0.2 s <plo-<o, 4
s<where D is denier).

In the present invention, the loop index (hereinafter referred to as L index) with a height of 0.5 fi or more from the yarn surface and a height of 2.0 m
The loop index of m or more is J I 5-L-1905
This is a numerical value obtained by counting the loops measured by F-INDEX TESTER, an optical fluff counter manufactured by Suppinbo Co., Ltd., in accordance with the fluff test method specified in . The yarn to be measured is one that has been unknitted from a dyed knitted fabric, and the lowest tension is applied so that the wavy crimp of the first stitch becomes straight.

In addition, the yarn speed during measurement was 30 m/min, and the measurement time was 20 m/min.
Second, the number of measurements is 10 times.

On the other hand, in the present invention, &I eye length [! ] The measurement method is to mark the 1st and 100th wells between 100 wells on the surface of the knitted fabric that has been dyed and finished, and count the number of stitches (S) of the core-sheath structure yarn between the 100 wells. 9 Next, the core-sheath structure yarn was disassembled, and 0.1 g/d
(d is denier) under the load of 100 wale ink length (
M) is measured and the stitch length (N) is determined using a linear equation.

j! = - (fi) Span 1) &I fabric of the present invention is a core made of synthetic fiber multifilament yarn having an L index of 80 or more and a loop having a loop index of 20 or less at a height of 2.0 m or more from the yarn surface. It is necessary that the sheath structure yarn constitutes 50% or more of the total number of stitches on the nine surfaces. According to experiments conducted by the present inventors, in a knitted fabric after dyeing, the height of the loops on the surface of the yarns constituting the knitted fabric is 0.
When the weight is less than 5 n, it is difficult to simultaneously obtain excellent textures such as a downy, spun-like texture, a soft puffy texture, and a warm texture. Also, the loop height on the yarn surface is 2.
Even if there are too many relatively large loops of 0 or more,
It was also found that the so-called zipper phenomenon, in which the surfaces of knitted fabrics stick to each other, tends to occur, and that practical defects such as snagging and dust adhesion tend to occur frequently. As a result of repeated experiments, in the knitted fabric after dyeing and finishing, the core-sheath structure yarn making up the knitted fabric has an L index of 80 or more, and a loop index of 2.0fi or more at a height from the yarn surface of 20. It has the following loops, the number of stitches formed by the yarn is 50% or more of the total number of stitches on the surface, and the stitch length is j! (
m) satisfies 0.25<l/ψD<0.45, a knitted fabric with no practical problems and excellent downy hair-like spun feel, puffiness, and warm feel was obtained.

The present invention will be further explained in detail below.

The spun-like knitted fabric of the present invention exhibits an excellent effect due to the synergistic effect of such loop fluff characteristics and specific stitch formation, and is a knitted fabric after dyeing finish (hereinafter referred to as 1wI fabric). 9) If the yarn constituting the yarn has a specified number of loops with a height of 0.5 mm or more on the surface of the yarn, that is, the L index is 80 or more, the surface of the knitted fabric has a fluffy feel. has been improved, and the loop index with a height of 2.0f1 or more is 20
If the following conditions are met, defects such as zipper phenomenon, snagging, and dust adhesion will not occur. however.

If the ratio of the number of eyelets formed by yarn having such loops is too low, the absolute amount of loops that stand out on the second stitch will be small, resulting in a downy, span-like feel.
Even if the ratio of the number of &W stitches is high, unless the stitch size is long enough to exhibit yarn characteristics, it is difficult to obtain an excellent feeling of fullness and warm feel.

Since more than 50% of the total number of stitches on the nine surfaces of the span-like knitted fabric of the present invention is composed of yarns having the above-mentioned specific loops, the AI ground surface has a large number of loops protruding, giving it a soft downy texture. It has a span-like feel. moreover,
Stitch length l force<0.25<1/φ1. In other words, the stitches are quite coarse.

The minute voids between the filaments on the yarn surface and in the inner layer are not lost due to the tightening of the stitches.

Innumerable voids created by such minute voids and three-dimensional mesh structures are contained in the surface layer and inner layer of the knitted fabric, resulting in an extremely excellent feeling of fullness and warmth. However, if the yarn that does not have the above-mentioned specific loops is formed with stitches of 0.25〈1/qi-, there will be many gaps between the stitches, resulting in a so-called thin yarn that lacks bulging sensation and warm feel. It becomes a tactile knitted fabric. This stitch length l is
When 0.25〉l/X/"5''", the tightness of the 9th stitch increases and the yarn becomes taut, so the voids in the yarn and the voids between the stitches are reduced, causing swelling and confusion. The result is a knitted fabric that lacks a warm feel. Also, the span UEiW area of the present invention is as follows.

Since the stitch length l is o and 4s>tt/f1, the stitches on one surface are not excessive and the shape of the nine stitches is stable, and the shape is highly stable without causing problems such as snagging.

However, if o,4s<Il/fi-, some of the &I stitches will casually stand out on the surface, deteriorating the appearance and physical properties, and the gap between the two stitches will increase too much, resulting in poor form stability of the first knitted fabric. becomes defective.

Next, an example of the manufacturing method for obtaining the spun-like knitted fabric of the present invention will be explained using one drawing.

FIG. 1 is a schematic diagram of processing steps for obtaining a core-sheath structured yarn constituting the span BF74 km fabric of the present invention.

First of all, in FIG. 1, the core-sheath structure yarn constituting the spun-like knitted fabric of the present invention is shown in FIG. It is supplied to the nozzle (3) and taken up by the delivery roller (4). On the other hand, the multifilament yarn (B) constituting the core is supplied to the fluid disturbance nozzle (3) by the second feed roller (2) at a lower overfeed rate than the multifilament yarn (A), and ).

As described above, the multifilament yarn (A) and the multifilament yarn (B) are simultaneously supplied to the fluid agitation nozzle (3) with a difference in overfeed rate. Thread (A)
constitutes the sheath portion, and the multifilament yarn (B) with a low overfeed rate is intertwined with the multifilament yarn (A) to constitute the core portion.

In such a manufacturing example, the L index on the ground is 80 or more,
In order to obtain a yarn with a height of 2.0 mm or more and a loop index of 20 or less, first, the number of single filaments of the multifilament yarn (A) is preferably 30 or more, and the overfeed rate to the fluid disturbance nozzle must be adjusted. As for the multifilament yarn (A) that makes up the sheath part, it is 15 to 80%, while the multifilament yarn (B) that makes up the core part is 2 to 1%.
0% is preferred.

In addition to the above manufacturing method, two or more yarns with different elongations are simultaneously false-twisted to give yarn length differences.

In addition to a method in which a fluid treatment is carried out after that, a method in which two or more yarns with different elongations are subjected to a fluid treatment and then subjected to a false twisting process, a high elongation yarn is drawn and false twisted, and the false twisted yarn is sheathed. Any method such as distributing it on a thread may be used.

Next, using the core-sheath structured yarn obtained as described above,
An example of the method for knitting the span y1m fabric of the present invention will be described.

FIG. 3 is a knitting organization chart showing an example of manufacturing the span-like knitted fabric of the present invention. In Figure 2, Yarn supply Himaru (
In the 4 yarn feeders F3), (F4), (F6), and (F7), only the cylinder needle (CN) forms stitches, so all the stitches knitted with these 4 yarn feeders are knitted fabrics. Configure the front side. Therefore, the above four yarn feeders (F3.F4.
F6. If the core-sheath yarn is supplied to all of F7), all the stitches on the second front side will be formed by the core-sheath yarn. Here, the above four yarn feeders (F3.F4.F6.F
Among 7), if core-sheath structure yarn is supplied to two or more yarn feeders.

50% or more of the stitches on the front side are formed by core-sheath structure yarns, and the span ff1m fabric of the present invention is obtained. on the other hand.

At the yarn feeder holes (F2) and (F5), dial needles (D
Since only stitches are formed in yarn feeder N), these two yarn feeders (F2°F
All the stitches knitted in 5) are arranged on the back side of the knitted fabric.

Also, a yarn feeder! At 1h (Fl), dial hand (DN)
, cylinder needles (CN) are also tuck-knitted, so the stitches formed at this yarn feeder (Fl) do not appear on both the front and back surfaces.

The stitch length can be adjusted by a commonly used method, that is, by changing the stitch cam position of the knitting machine and the amount of yarn supplied.

However, the stitch length in the present invention refers to the value of a knitted fabric that has been dyed and finished, so the stitch length during knitting must be determined by calculating the heat shrinkage rate of the yarn.

(Example) The present invention will be specifically explained below with reference to two examples.

Example 1 Polyester 100 d as supply yarn (A) for sheath yarn
/48f, using polyester 75d/36f as the core yarn (B), three yarns were prepared under the processing conditions shown in Table 1 through the processing steps shown in FIG.

The loop index shown in Table 1 is the loop index of a height of 0.5 fi or more formed in the yarn after yarn processing.

Similarly to Table 1, the loop index for heights of 2.0w or more is also the value measured after yarn processing.

Subsequently, using these three yarns, nine knitted fabrics shown in Table 2 were created with the knitting structure shown in FIG. 3. In addition.

A 20-gauge circular knitting machine was used as the knitting machine, and the stitch composition ratio of the core-sheath yarn was yarn feeder N1 (F3) of the structure shown in FIG.

The yarn feeding ratios to (F 4), (F 6), and (F 7) are changed. Furthermore, interlaced yarns other than core-sheath yarns are
Polyester false twisted yarn (2 heaters) 150d/30
f, and the dyeing and finishing process was carried out by a conventional method.

The evaluation method was performed as follows.

(1) Bulk height Measured according to JIS-L-1018 bulk height measurement method.

Bulk height (cd/g) - T/Wx l Q'where, W:
Mass (g/coi) T: Thickness tm) (2) Feeling of fullness 1: Evaluated in 4 stages according to sensory test.

◎: Very good O: Good Good △: Fairly bad ×: Bad
After applying a load of kg for 1 minute, the weight was removed, and when one end of the upper sample piece was lifted, the condition of the lower sample piece being lifted up was evaluated in 3 grades.

○：I will not take you with me. △: He will take you up a little, but will leave you soon. ×: Do not leave while being taken away The evaluation of the obtained knitted fabrics is shown in Table 2.

The L index is 80 or more, the loop index is 20 or less with a height of 2.01■ or more, the composition ratio of 9 stitches is 50% or more, and the stitch length l is o
, zs<g/J6-<o, knitted fabric samples a to d satisfying all of 4s have a high bulkiness and feel good to the touch.

This is an extremely preferable Span 1JII fabric with excellent puffiness and no zipper phenomenon. On the contrary.

Height 2. O1) When the loop index of 1 or more exceeds 20.

The fastener phenomenon is strong, making it impractical for practical use, and even if the L index is 80 or more and the loop index is 20 or less for a height of 2.0 mm or more, the first stitch composition ratio is less than 50%, or the first stitch When the length i was 0.25>1/'JTf>-, the bulkiness was reduced and the feel to the touch and the feeling of swelling were poor.

Example 2 Highly oriented undrawn polyester yarn 1) 0d/36f was used as the supply yarn (C) for the sheath yarn, and polyester 75d/36f was used as the supply yarn (D) for the core yarn. 3 yarns N14.5.6 were created in the processing step shown in Table 3 under the processing conditions.

Table 3 Subsequently, using these three yarns, eight knitted fabrics shown in Table 4 were created with the knitting structure shown in FIG. 3. knitting machine.

The stitch composition ratio, cross-knitting yarn, and dyeing finish are the same as in Example 1.

The evaluation of the obtained knitted fabrics is as shown in Table 4. Samples Na1l, n, and r of the example had a high bulkiness and had an extremely good feel to the touch and a feeling of fullness.

It is a knitted fabric with a downy, span-like feel that does not exhibit the zipper phenomenon.

Here, in yarn processing IVk & 4, although the LJ season number is 72, the L index of the yarn obtained by disassembling the knitted fabric after dyeing is 8.
The score was 5.89, indicating a value exceeding 80. On the other hand, comparative samples mk, m, o, and p.

All 5 points of q have an L index of 80 or more.

Since it does not satisfy either the stitch composition ratio or the stitch length, it is a knitted fabric that has some drawbacks in terms of bulkiness, texture, swelling feeling, etc.

Note that the evaluation method is the same as in Example 1.

(Effects of the Invention) As described above, in the spun-like knitted fabric of the present invention, the core-sheath structure yarn forming the front side of the knitted fabric in a state after dyeing processing has a specific loop, and furthermore, the yarn has a specific loop. The stitch composition ratio of the strips is set to be 50% or more, and the stitch length is set within a specific range. Therefore, the span ff1m of the present invention is 9
The surface has a soft downy hair-like feel, a flexible swelling sensation, and a bulky, warm feel.Moreover, it has excellent anti-zipper and anti-snagging properties, and has a washability characteristic of synthetic fibers.
There are many (
It is a versatile knitted fabric that combines functionality.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are process schematic diagrams each showing an example of the manufacturing process of the core-sheath structure yarn of the present invention. FIG. 3 is a knitting organization chart showing an example of knitting the span 1ilJiH fabric of the present invention. 5---Yarn package 6--Feed roller 7--Heater 8--m=--Spindle 9--1st delivery - Roller 10 - - - Fluid disturbance nozzle 1 - - - Second delivery roller 12 - - -
--- Yarn package patent applicant Uni f:h
Co., Ltd. Figure 3 CN 'I'l'l'1 Procedural Specialist Ho Seishoba) March 19, 1988 1, Incident display address 1-50 Higashihonmachi, Amagasaki City, Hyogo Prefecture Name (45
0) Yu-Tei Chikara Co., Ltd. 541 Address 4-68 Kitakyutabe-cho, Higashi-ku, Osaka Name Yu-Tei Chikara Co., Ltd. Patent Department Telephone: 06-281-5258 (Dial-in) 4.
In Column 5 of "Detailed Description of the Invention" of the specification to be amended, contents of the amendment (1) "Figure 2" in line 5 of page 1 of the specification is corrected to "Figure 3."

Claims (1)

[Claims] (1) Made of synthetic fiber multifilament yarn, with a loop index of 80 or more at a height of 0.5 mm or more from the yarn surface;
and a knitted fabric in which 50% or more of the surface stitches are made up of core-sheath yarns having loops with a height of 2.0 mm or more and a loop index of 20 or less, and the stitch length of the core-sheath yarns is l. (mm) is 0.25<l/√D<0.45 (where D is denier).