JP3070633B2 - Manufacturing method of knitted fabric by single knitting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a knitting machine which can be suitably used as a base cloth for clothing such as golf gloves, a base cloth for synthetic leather, and a wipe for optical lenses such as eyeglass lenses by a single knitting machine. It relates to a manufacturing method.

[0002]

2. Description of the Related Art Conventionally, as a base cloth of golf gloves, a knitted fabric having microfine fibers densely formed on its surface has been used.
The reason for using the ultrafine fibers is to improve the feel and feel of the surface, or to increase the frictional resistance to prevent slippage. However, when a knitted fabric is obtained using a thread made of ultrafine fibers, only a knitted fabric lacking in tension and waist and lacking dimensional stability can be obtained. This is because the ultrafine fibers themselves do not have sufficient rigidity.

[0003] For this reason, attempts have been made to increase the knitting density of the knitted fabric so as to give the knitted fabric a tension, waist, or dimensional stability. However, when a single knitting machine was used, the knitting density could not be extremely increased in practice. Therefore, it has been difficult to impart satisfactory tension and waist to a knitted fabric using a single knitting machine. On the other hand, it has been attempted to use a double knitting machine to extremely increase the knitting density and give the knitted fabric a tension or a waist. However, when the knitting density is increased by using only ultrafine fibers, the weight per unit area becomes extremely heavy, and thus it is not suitable as a base cloth for golf gloves or a wipe for optical lenses. Further, since a large amount of ultrafine fibers are used per unit area, the resulting knitted fabric is expensive.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a specific method which is a single knitting machine using a yarn made of ultrafine fibers and a yarn made of large fineness fibers having certain physical properties. By knitting the knitted fabric, and then shrinking the knitted fabric, it is possible to obtain a knitted fabric having sufficient tension, waist, and the like, and having a relatively light weight per unit area due to the presence of large fineness fibers. It is assumed that.

[0005]

That is, the present invention provides a fineness of 2
1010 denier, hot water shrinkage 15-40%, and the maximum thermal stress value 0.4-0.8 g / d. And the hot water shrinkage and the maximum thermal stress value are located at the outer side of the stitch the yarn B made of ultrafine fibers smaller than the fineness fiber, the stitches are two yarns of yarn A and yarn B After knitting the knitted fabric with a single knitting machine so that it is formed, the knitted fabric is subjected to a hot water treatment to shrink the large fineness fibers, thereby revealing ultrafine fibers on the surface of the knitted fabric. And a method for producing a knitted fabric using a single knitting machine.

[0006] In the present invention, first, a yarn A made of a fine fiber is prepared. This large fineness fiber has a fineness of 2 to 10
Denier. If the fineness is less than 2 denier, the rigidity of the large fineness fiber itself is low, and the resulting knitted fabric cannot have sufficient tension and waist. Conversely, the fineness of the large fineness fiber
If it exceeds 10 denier, the rigidity of the large fineness fiber itself becomes too high, and the texture of the resulting knit becomes coarse and hard.

[0007] The large fineness fiber has a hot water shrinkage of 15%.
~ 40%. If the hot water shrinkage of the fine fiber is less than 15%, the knitted fabric cannot be sufficiently shrunk, and the resulting knit cannot have sufficient dimensional stability, tension, or the like, which is not preferable. Conversely, if the hot water shrinkage of the large fineness fiber exceeds 40%, the knitted fabric shrinks too severely, the arrangement of the stitches tends to be disordered, and a knitted product having a uniform appearance cannot be obtained. In the present invention, it is particularly preferable to set the hot water shrinkage of the large fineness fiber within the range of 20 to 30%. Here, the measuring method of the hot water shrinkage ratio is as follows. That is, once the fiber is fixed, and (1/10) g /
Apply an initial load of d, measure 500 mm correctly, and mark two points. Then, after taking an initial load and immersing it in boiling water for 30 minutes, take it out, lightly drain it with blotting paper or cloth, and air dry naturally in a horizontal state. Then, apply the initial load again and
Measure the length Lmm between points. Perform the above Lmm measurement 10 times each,
Then, the shrinkage is calculated by the formula [(500−L) / 500] × 100, and the average value is defined as the hot water shrinkage (%).

[0008] The large fineness fiber has a maximum thermal stress value.
0.4 to 0.8 g / d. The above hot water shrinkage is 15-40%
If the maximum thermal stress value is not in the range of 0.4 to 0.8 g / d, it is not possible to impart preferable shrinkage to the knitted fabric. For example, the maximum thermal stress value is 0.4 g / d
If it is less than this, the entire stitch composed of the yarn A is not sufficiently shrunk, which is not preferable. Conversely, the maximum thermal stress value is 0.
If it is more than 8 g / d, the entire stitch composed of the thread A is strongly shrunk, and the stitch is disturbed.
In the present invention, in particular, the maximum thermal stress value of the fineness fiber is
It is preferable to set within the range of 0.5 to 0.6 g / d. Here, the maximum thermal stress value is measured by the following method. That is, using a commercially available dry heat shrinkage stress measuring instrument, the sample was formed into a ring having a diameter of 15 cm, and the initial tension was 60 mg / d.
, And the stress is measured at a heating rate of 300 ° C./60 sec. Then, the maximum value of the developed stress is set as the maximum thermal stress value.

Specific examples of the large fineness fiber having the hot water shrinkage and the maximum thermal stress value as described above include a copolymer of polyethylene terephthalate and isophthalic acid or a copolymer of polyethylene terephthalate and bisphenol It is preferable to use polyester-based fineness fibers melt-spun using a polyester-based copolymer such as Then, a plurality of such thick fine fibers are bundled to form a yarn A.

On the other hand, a yarn B made of ultrafine fibers having a fineness of 0.1 to 0.5 denier is prepared. If the fineness of the ultrafine fiber exceeds 0.5 denier, the rigidity of the fiber increases, and the feel and feel of the surface of the obtained knitted fabric are undesirably reduced. Conversely, it is difficult to make the fineness of the ultrafine fibers less than 0.1 denier in the production of the ultrafine fibers. Further, the hot water shrinkage rate and the maximum thermal stress value of the ultrafine fiber are smaller than the hot water shrinkage rate and the maximum thermal stress value of the large fineness fiber. If the hot water shrinkage ratio of the ultrafine fiber is larger than that of the large fine fiber, when the large fine fiber is shrunk, the ultrafine fiber will not appear on the surface of the knitted fabric and will be embedded inside the knitted fabric. Is not preferred. The yarn B is made of such ultrafine fibers, and the fineness of the yarn B is preferably about 30 to 150 denier. Thread B
When the fineness of the stitch becomes less than 30 denier, the yarn B
Is difficult to position, and the reversal phenomenon of the yarn A and the yarn B occurs, and the yarn B tends to be positioned inside the stitch. When the fineness of the yarn B exceeds 150 denier, the yarn B becomes too heavy, and the weight of the obtained knitted fabric tends to be heavy. In particular, the fineness of the yarn B is preferably set within a range of 50 to 75 denier.

The yarn B may be formed by bundling a plurality of the above-mentioned ultrafine fibers or by bundling a plurality of split-type fibers obtained by bonding the above-described ultrafine fibers with a bonding agent. It may be. In particular, in the present invention, it is preferable to use splittable fibers. Various conventionally known splitting fibers can be used. For example, as shown in FIG. 1, a plurality of wedge-shaped ultrafine fibers (1b) bonded with a bonding agent (1a) can be used. From this splittable fiber, the bonding agent (1
If a) is removed, the splittable fiber is split into a bundle of ultrafine fibers (1b) as shown in FIG. When a splittable fiber is used, it is necessary to split the fiber at an optional step to develop an ultrafine fiber. Generally, after knitting a knitted fabric, the splittable fibers are split before shrinking the large fineness fibers.
However, before knitting the knitted fabric or after shrinking the fine-fiber fibers, the splittable fibers may be split to express ultrafine fibers.

As the composition of the ultrafine fibers, various known compositions can be used. In the present invention, it is particularly preferable to use polyester ultrafine fibers. In particular, use a fiber formed of a polyester polymer having low alkali solubility as the ultrafine fiber (1b), and use a fiber formed of a polyester polymer having high alkali solubility as the bonding agent (1a) It is preferable to use a polyester-based splittable fiber. As the polyester polymer having low alkali solubility, a polyester having an ethylene terephthalate structural unit in which 90 mol% or more is generally used, and as the polyester polymer having high alkali solubility, sodium sulfoisophthalic acid 1 Copolymerized polyesters containing up to 5 mol% and 10 to 30% by weight of polyalkylene glycol are generally used. In the case where such a polyester-based splittable fiber is used, a bundle of ultrafine fibers is generated by removing the binder (1a) with an aqueous alkaline solution or the like. Such a division is generally performed by applying an alkali reduction treatment to a knitted fabric or the like. And
The alkali weight loss rate is preferably about 10 to 30%, particularly preferably 20 to 30%.
Most preferred is about 25%. If the alkali weight loss rate is less than 10%, the division is insufficient, and a tendency to generate a bundle of ultrafine fibers tends to be difficult. When the alkali weight loss rate exceeds 30%, the ultrafine fibers are also eroded, and the strength of the resulting knitted fabric tends to decrease.

Using the yarn A and the yarn B described above, knitting is performed with a single knitting machine. In the present invention, knitting is performed such that the yarn A is located inside the stitch and the yarn B is located outside the stitch. That is,
The stitch is composed of two yarns A and B, and the yarn A is located inside the stitch and the yarn B is located outside the stitch.
When the yarn A is located outside the stitch and the yarn B is located inside the stitch, even if the yarn A is shrunk, the ultrafine fibers constituting the yarn B are hard to appear on the surface of the knitted fabric. It is not preferable. Specifically, the yarn A and the yarn B may be separately and regularly arranged and knitted at a two-hole yarn feeder of a single knitting machine as shown in FIG. Thus, a knitted fabric having a stitch formed by the yarn A and the yarn B is obtained. In addition,
The knitting structure is preferably the sheet knitting structure shown in FIG. 4, but other knitting structures such as a fawn knitting structure may be used. Further, the gauge of the single knitting machine is preferably about 16 to 32 gauge, and most preferably about 24 to 28 gauge.

The knitted fabric is immersed in hot water or the like and subjected to a hot water treatment to shrink. Specifically, the knitted fabric is immersed in hot water at the time of dyeing or finishing, and contraction occurs during these processes. The yarn A located inside the stitch constituting the knitted fabric has a hot water shrinkage factor of the fine fiber of 15% which is a constituent fiber thereof.
Because it is ~ 40%, it shrinks greatly. On the other hand, the yarn B located on the outer side of the stitch is such that the hot water shrinkage of the microfiber as a constituent fiber thereof is smaller than the hot water shrinkage of the fineness fiber, so that the yarn B rises on the surface of the knitted fabric. It is manifested in a dense state. After such a hot water treatment, a brushing process may be performed to further raise the ultrafine fibers on the surface of the knitted fabric. As the raising process, a conventionally known raising process such as an emery raising process or a needle cloth raising process is employed. As described above, a knitted fabric excellent in surface feel and feeling can be obtained. In addition, when using what consists of the split type fiber which the ultrafine fiber was joined as the thread B, the split type fiber may be divided | segmented before a shrinkage | reduction process, and an ultrafine fiber may be expressed, At the same time, the splittable fibers may be split.
The splittable fibers may be split after the shrinking step.

[0015]

EXAMPLES As a yarn A, a multi-filament yarn of 30 denier / 12 filaments was used. The fineness of this filament (large fineness fiber) was 2.5 denier, the hot water shrinkage was 25%, and the maximum thermal stress value was 0.5 g / d.
The component of the large fineness fiber is a copolymer of polyethylene terephthalate and 10 mol% of isophthalic acid.

As the yarn B, a false twisted yarn obtained by false twisting a 70-denier / 48-filament multifilament composed of splittable fibers as shown in FIG. 1 was used.
Here, the component of the wedge-shaped ultrafine fiber (1b) is polyethylene terephthalate having an intrinsic viscosity of 0.67, and the component of the bonding agent (1a) bonding the ultrafine fiber (1b) is polyethylene glycol having a molecular weight of 6000 and 23% by weight. 2 mol% of sulfoisophthalic acid
Is a copolymerized polyester. In addition, very fine fibers (1
The weight ratio between b) and the bonding agent (1a) is as follows:
a) = 4: 1, so that the fineness of the microfiber (1b) is about 0.15
Denier. The hot water shrinkage of the ultrafine fiber (1b) is 5
%, And both the hot water shrinkage ratio and the maximum thermal stress value were significantly smaller than those of the large fineness fiber.

The yarn A and the yarn B were knitted with a single knitting machine (single knitting machine XL-3FA type, manufactured by Fukuhara Seiki Co., Ltd.) having a two-hole yarn feeder shown in FIG. The yarn A was fed with a tension of 4 g to the α-hole of the two-hole yarn feeder, and the yarn B was fed with a tension of 3 g to the β-hole. The reason for providing the difference in the yarn feeding tension is to ensure that the yarn A is positioned inside the stitch and the yarn B is positioned outside the stitch. The yarn feed length was set to be 17.0 cm at 100 wales. Here, the yarn feed length is a mark at any position on the wale,
The wales were counted and marked, and the length between the marks after the knitting was applied with a load of (1/10) g per total denier, and the length was measured. In addition, as shown in FIG. 4, a so-called sheet-knit knitting structure of all-needle knitting was used as the knitting structure. In FIG. 4, the dotted line indicates the yarn A, and the solid line indicates the yarn B. It was knitted with a hook diameter of 26 "and a gauge of 28G.

The knitted fabric obtained as described above was subjected to an alkali weight reduction treatment. As a result, the weight of the knitted fabric was reduced by 20% by weight, the bonding agent (1a) of the splittable fibers constituting the yarn B was removed, and a bundle of ultrafine fibers (1b) was developed. Thereafter, dyeing and finishing were performed according to a conventional method. Since this dyeing-finishing process is performed with hot water, the fineness fibers constituting the yarn A shrink, and the surface of the knitted fabric is covered with the ultrafine fibers.
The knitted fabric thus obtained has a width of 110 cm and a basis weight of 200 g /
m, density 50 courses / inch and 57 wale / inch. The surface of the knitted fabric had a good feel and feel, had tension and waist, and had excellent dimensional stability. In addition, this knitted fabric has a washing shrinkage ratio (JIS L-0217
Method), pilling (JIS L-1076 method), snacking (JIS
L-1058 method) and physical properties such as iron shrinkage.

[0019]

As described above, the method for producing a knitted fabric according to the present invention has a fineness of 2 to 10 deniers, a hot water shrinkage of 15 to 40%, and a maximum thermal stress value of 0.4 to 0.8 g / d. In the yarn A consisting of the fine fiber of d, and the fineness of 0.1 to 0.5 denier,
And the hot water shrinkage and the maximum thermal stress value using two yarns of the yarn B consisting of ultrafine fibers smaller than the fineness fiber,
After knitting the knitted fabric with a single knitting machine so that the yarn A is located inside the stitch and the yarn B is located outside the stitch,
This knitted fabric is subjected to hot water treatment to shrink the large fineness fibers. Therefore, even if the knitted fabric is knitted at a low density (low density) by a single knitting machine, the high-density fiber contracts later and the entire knitted fabric contracts, whereby a high-density knitted fabric can be obtained. Furthermore, the knitted fabric is knitted with a relatively large rigidity and large fineness fiber. Therefore, the densification of the knitted fabric and the presence of the large fineness fibers in the knitted fabric can provide the knitted fabric with satisfactory tension and waist, and further, dimensional stability. Furthermore, since the fineness fibers are present in the knitted fabric, even if the knitted fabric is densified, the weight per unit area can be reduced as compared with the case where only microfibers are used. This has the effect that the price of the product can be reduced.

By subjecting the knitted fabric to a hot water treatment,
The ultrafine fibers having a smaller hot water shrinkage ratio than the large fine fibers will appear on the surface of the knitted fabric as the large fine fibers shrink. Therefore, the obtained knitted fabric has an effect that the fine fibers are present in a raised state on the surface, and the texture is good and the feeling is good with a peach skin tone. Accordingly, the knitted fabric obtained by the method according to the present invention is suitable for a cloth for clothing such as golf gloves, a cloth for synthetic leather, a wipe for optical lenses such as lenses for eyeglasses, or various other uses. It can be used.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a cross section of a splittable fiber containing ultrafine fibers used in the present invention.

FIG. 2 is a view showing a cross section in a case where the splittable fiber shown in FIG. 1 is split and ultrafine fibers are developed.

FIG. 3 is a schematic side view of an example of a yarn feeding device of a single knitting machine used in the present invention.

FIG. 4 is a diagram showing an example of a knitting structure used in the present invention.

[Explanation of symbols]

 (1b) Microfiber A yarn A B yarn B

Continuation of the front page (56) References Japanese Utility Model Sho 58-83487 (JP, U) Japanese Utility Model Sho 54-14074 (JP, U) Patent 2781826 (JP, B2) Patent 3023896 (JP, B2) (58) Field (Int.Cl. ⁷ , DB name) D06C 3/00-29/00 D04B 1/00-1/28

Claims (1)

(57) [Claims] 1. A fineness of 2 to 10 denier and a hot water shrinkage of 15 to 4
A yarn A of 0% and a large fineness fiber having a maximum thermal stress value of 0.4 to 0.8 g / d is positioned inside the stitch, and the fineness is 0.1 to 0.5.
Denier, the hot water shrinkage and the maximum thermal stress value, the yarn B consisting of ultra-fine fibers smaller than the fineness fiber is located outside the stitch, the stitch is two yarn A and yarn B After knitting a knitted fabric with a single knitting machine so as to be formed of yarn, the knitted fabric is subjected to a hot water treatment to shrink the large fineness fiber, thereby forming an ultrafine fiber on the surface of the knitted fabric. A method for producing a knitted fabric using a single knitting machine, characterized by manifesting.