WO2023224126A1

WO2023224126A1 - Knitted product, and production method for knitted product

Info

Publication number: WO2023224126A1
Application number: PCT/JP2023/018819
Authority: WO
Inventors: 友厚山尾
Original assignee: 株式会社ジェーピー・アバンス; アバンスインターナショナルカンパニーリミテッド
Priority date: 2022-05-19
Filing date: 2023-05-19
Publication date: 2023-11-23
Also published as: JPWO2023224126A1

Abstract

[Problem] To provide: a knitted product which uses natural fiber yarn and/or synthetic fiber yarn, and in which elongation and contraction of ground yarn can be effectively inhibited without using a large-scale thermal treatment device; and a production method for the knitted product. [Solution] According to the present invention, thermal fusion bonding yarn that melts at 105°C or lower is fusion-bonded to all or a portion of ground yarn that is natural fiber yarn and/or synthetic fiber yarn. A knitted product, in which the thermal fusion bonding yarn is not melted, is efficiently produced by forming using a flat knitting machine while knitting the thermal fusion bonding yarn into all or a portion of the ground yarn. Since the thermal fusion bonding yarn melts at 105°C or lower, the thermal fusion bonding yarn can be melted by an electric steam iron so as to be fusion-bonded to the ground yarn, without using a large-scale thermal treatment device. Since the thermal fusion bonding yarn is fusion-bonded to the ground yarn of the knitted product, elongation and contraction of the ground yarn can be inhibited.

Description

Knit products and methods of manufacturing knit products

The present invention relates to knit products such as sweaters and cardigans.

High-stretch and low-stretch parts are used as circular knit fabrics for knit products such as complementary innerwear products such as girdles, leggings, and bras, as well as compression wear such as sports bottom wear and sports underwear. (For example, see Patent Document 1).

In the circular knitted fabric of Patent Document 1, the ground yarn is the same in the low elongation part and the high elongation part, the low elongation part contains heat-fusible yarn, and at least a part of the heat-fusible yarn is mutually bonded. It is heat fused. As the ground yarn in the circular knitted fabric of Patent Document 1, elastic yarns such as polyurethane-based and polyetherester-based yarns are used. The heat-fusible yarn in the circular knitted fabric of Patent Document 1 is a fiber that has the property of being melted and fused by heat treatment at 120° C. for 1 minute with dry heat or heat treatment at 110° C. for 30 seconds with wet heat, and is a polyamide fiber. , polyester fiber, polyurethane fiber, etc. are used.

Patent No. 5688240

Because knits have continuously connected loops, they have advantages over woven fabrics, such as being highly stretchable and flexible, as well as being highly effective at retaining heat.

However, knitted products that use natural fiber yarns and/or synthetic fiber yarns in general have disadvantages such as being prone to losing their shape, such as stretching due to gravity when hung on a hanger, and shrinking when washed. be.

In particular, in the case of knitted products using natural fiber yarns, when washed with water, the hydrophilic fibers absorb water and become thicker and shorter, sometimes shrinking by about 10%, for example.

In addition, when the natural fiber yarn is wool, the fibers become entangled and shrink (felted) when knitted products are subjected to force such as kneading, rubbing, or pressing while wet, such as when washing them with water. There are disadvantages.

In knit products such as sweaters and cardigans using natural fiber yarns and/or synthetic fiber yarns, when using the heat-fusible yarn in the circular knitted fabric of Patent Document 1 to suppress the expansion and contraction of the ground yarns, heat is applied to the ground yarns. In order to fuse the fusible yarn, it is necessary to perform a heat treatment with dry heat at 120° C. for 1 minute or with wet heat at 110° C. for 30 seconds. When performing heat treatment at 120°C dry heat for 1 minute or heat treatment at 110°C wet heat for 30 seconds, depending on the natural fiber yarn and/or synthetic fiber yarn used for the knit product, the fibers may be damaged and the texture may be impaired. There is.

In addition, in order to perform heat treatment at 120℃ dry heat for 1 minute or heat treatment at 110℃ wet heat for 30 seconds, after knitting the knitted fabric containing heat-fusible yarn, use a pin tenter dry heat setting machine or autoclave moist heat treatment. It is necessary to use large-scale heat treatment equipment such as a setting machine. Therefore, a necessary capital investment is required and small-lot production becomes difficult. When requesting heat treatment of knitted fabrics containing heat-fusible yarn to a factory that has the above-mentioned large-scale heat treatment equipment, the production period becomes long.

The purpose of the present invention is to effectively suppress the expansion and contraction of the base threads of knit products using natural fiber yarns and/or synthetic fiber yarns without impairing the texture and without using large-scale heat treatment equipment. do.

The knit product according to the first aspect of the present invention is a knit product using natural fiber yarn and/or synthetic fiber yarn. In the knit product, a heat-fusible yarn that melts at 105° C. or lower is fused to all or part of the ground yarn.

A knit product according to a second aspect of the present invention is a knit product according to the first aspect, in which the knit product is produced using a flat knitting machine.

The knit product according to the third aspect of the present invention is the knit product according to the first aspect or the knit product according to the second aspect, wherein the heat-fusible yarn is a nylon heat-fusible yarn having a melting point of 75°C or more and 90°C or less. It is.

In the knit product according to the fourth aspect of the present invention, in the knit product according to the first aspect, the fineness of the heat-fusible yarn is 30 denier or more and 150 denier or less.

The method for producing a knitted product according to the fifth aspect of the present invention includes knitting a heat-fusible yarn that melts at 105° C. or lower into all or part of the base yarn, which is a natural fiber yarn and/or a synthetic fiber yarn, while A first step of manufacturing a knit product in which the heat-fusible yarn is not melted using a flat knitting machine; and a step of melting the heat-fusible yarn using a steam iron for the knit product that has undergone the first step; and a second step of fusing the heat-fusible yarn to the base yarn.

A method for producing a knit product according to a sixth aspect of the present invention is a method for producing a knit product according to the fifth aspect, wherein the heat-fusible yarn is a nylon heat-fusible yarn having a melting point of 75° C. or more and 90° C. or less. .

The knit products according to the present invention and the knit products manufactured by the method for manufacturing knit products according to the present invention use natural fiber yarns and/or synthetic fiber yarns. Since the heat-fusible yarn is fused to all or part of the base yarn, expansion and contraction of the base yarn, which is a natural fiber yarn and/or a synthetic fiber yarn, can be suppressed.

While knitting the heat-fusible yarn into all or part of the ground yarn, which is a natural fiber yarn and/or synthetic fiber yarn, the knit product is knitted with the heat-fusible yarn in a state where the heat-fusible yarn is not melted, for example, using a flat knitting machine. By manufacturing by forming knitting by using knitting, it is possible to efficiently manufacture a knit product in which the heat-fusible yarn is not melted while reducing the amount of yarn used and cutting loss.

Since the heat-fusible yarn melts at a temperature of 105° C. or lower, the steam iron can be moved to apply steam to the desired location of the knit product where the heat-fusible yarn is present, without using a large-scale heat treatment device. The heat-fusible yarn can be melted and bonded to the base yarn by an efficient operation using an iron. Therefore, the texture of the knitted product is not impaired, and small-lot, short-cycle production that meets the individualization and diversification of consumer needs becomes possible.

It is a knitting diagram of Milano rib knitting. It is a knitting diagram of single ridge knitting.

<Knit products>
The knitted product of the present invention uses natural fiber yarn and/or synthetic fiber yarn. That is, the knitted product is one that uses only natural fiber yarn, one that uses only synthetic fiber yarn, or one that uses blended yarn that is a mixture of natural fiber and synthetic fiber at a predetermined mixing ratio. The fineness of the yarn is from 1st to 100th. As the natural fiber yarn, for example, cotton yarn, wool yarn, animal wool yarn, etc. are used. As the synthetic fiber thread, acrylic, polyester, etc. are used.

The knitted products of the present invention include all knitted products made using a flat knitting machine, such as clothing such as sweaters, cardigans, dresses, and skirts, bags such as tote bags, handbags, and backpacks, and shoulder pads and knee pads. These are retrofitted pads for clothing such as clothing.

The type of knitting method for the knitted product of the present invention is not limited. That is, the knitting method for the knit product of the present invention may be any method as long as it can be flat knitted, such as jersey knitting, rib knitting, Milano rib knitting, ridge knitting, pique knitting, garter knitting (purl knitting), and openwork knitting.

In the knit product of the present invention, a heat-fusible yarn that melts at 105° C. or lower is fused to all or part of the base yarn, which is a natural fiber yarn and/or a synthetic fiber yarn. The heat-fusible yarn melts at a temperature of 105°C or less, and is, for example, a nylon heat-fusible yarn with a melting point of 75°C or more and 90°C or less.

The fineness of the heat-fusible yarn is 30 denier or more and 150 denier or less, and is used depending on the thickness and hardness of the knitted fabric to achieve the desired texture.

In the knit product of the present invention, since the heat-fusible yarn is fused to all or part of the ground yarn, which is a natural fiber yarn and/or a synthetic fiber yarn, expansion and contraction of the ground yarn can be suppressed. The shrinkage ratio of the natural fibers can be controlled by knitting the natural fibers of the ground yarn and the heat-fusible yarn in a required distribution.

<Manufacturing method of knit products>
The knitted product of the present invention is manufactured using a flat knitting machine that creates a shape according to a pattern. In other words, a knit product in which a heat-fusible yarn that melts at 105° C. or lower is knitted into all or part of the ground yarn, which is a natural fiber yarn and/or a synthetic fiber yarn, but the heat-fusible yarn is not melted. is manufactured using a flat knitting machine (first step). For example, by manufacturing knit products by forming knitting using a flat knitting machine, knit products can be efficiently manufactured in a state where the heat-fusible yarn is not melted while reducing the amount of yarn used and cutting loss. can.

Next, the heat-fusible yarn is melted using a steam iron that injects high-temperature steam from a hole in the bottom of the knit product in which the heat-fusible yarn is not melted, and the heat-fusible yarn is melted onto the base yarn. Fusing the heat-fusible thread (second step). Since the heat-fusible yarn melts at temperatures below 105°C, it is possible to apply an electric current of, for example, 1000W to 1500W to apply steam to the required locations of the knit product where the heat-fusible yarn is present, without using a large-scale heat treatment device. The heat-fusible yarn can be melted and bonded to the ground yarn by efficient operation using the steam iron by moving the steam iron.

<Example of heat-fusible yarn that melts at 105°C or lower>
In a preferred embodiment, a nylon heat-fusible thread having a melting point of 75°C or more and 90°C or less is used as the heat-fusible thread that melts at 105°C or less.

Examples of nylon heat-adhesive threads with a melting point of 75°C or more and 90°C or less include CHANGZHOU CITY LINGXIAN TEXTILE EQUIPMENT CO., LTD.'s "nylon heat-adhesive thread" (melting point 80°C) or Mitsubishi Chemical Corporation's "Nylon heat-adhesive thread" (melting point 80°C) Japanese heat-sealing yarn 78T (melting point: 85°C) can be used.

<Example of how to insert heat-fusible thread>
(1) When suppressing vertical and horizontal elongation In jersey knitting, rib knitting, ridge knitting, etc., ground yarn and heat-fusible yarn are used throughout. Double mill knitting is desirable, in which two different threads are knitted at the same time. The base yarn and the heat-fusible yarn head from individual yarn insertion ports to the head of the flat knitting machine and join at the head.

(2) When stopping horizontal elongation while maintaining vertical elongation For example, in the Milano rib knitting diagram shown in Figure 1, the ground yarn (1) looped by the latch needles on the front needle bed and the latch needles on the rear needle bed. Among the ground yarns of rubber knitting (rib knitting), (2) the ground yarns that loop only with the back needles on the back needle bed, and (3) the ground threads that loop only with the back needles of the front needle bed, (2) ) and (3), align the heat-fusible yarn with the ground yarn (knit the heat-fusible yarn).

For example, in the knitting diagram of single ridge knitting shown in Figure 2, of the ground yarn of (1) tuck knitting and the ground yarn of (2) rubber knitting, heat-fusible yarn is added to the ground yarn of (1). Pull them together (weave in heat-fused yarn).

(3) When maintaining form stability while maintaining elasticity of the knitted fabric For example, in the knitting diagram of Milano rib knitting shown in Figure 1, heat-fusible yarn is aligned with the ground yarn of rubber knitting in (1) (heat-fusible yarn ).

For example, in the knitting diagram of single ridge knitting shown in FIG. 2, the heat-fusible yarn is aligned with the ground yarn of the rubber knit (2) (the heat-fusible yarn is knitted).

<Specific method for adjusting the tension of knit products>
The magnitude of the tension (width of expansion and contraction) of a knitted product is adjusted as follows, for example, by how the heat-fusible yarn is inserted into the base yarn of the course, which is a row of loops arranged in the horizontal direction of the knitted fabric.

(1) When the tension is to be very low Knit the base yarn of all courses together with the heat-fusible yarn.

(2) When lowering the tension Three courses of ground yarn are knitted together with heat-fusible yarn, two courses are knitted only with ground yarn, and these steps are repeated.

(3) When setting the tension to normal Knit one course of ground yarn together with heat-sealable yarn, knit one course only with ground yarn, and repeat these steps.

(4) When increasing the tension Two courses of the ground yarn are knitted together with the heat-sealable yarn, the third course is knitted only with the ground yarn, and these steps are repeated.

(5) When the tension is to be extremely high: Knit one course of ground yarn together with heat-sealable yarn, knit nine courses only with ground yarn, and repeat these steps.

<Evaluation of washing resistance>
(Evaluation method)
Washing was carried out based on the C4M method of JIS L 1930:2014 "Home washing test method for textile products" (washing at 40℃ for 6 minutes, rinsing for 2 minutes twice, dehydrating for 3 minutes each time, and hanging to dry). And the dimensional change rate after drying is calculated as [(length after treatment) - (length before treatment)]/(length before treatment).

(Evaluation target)
The object of evaluation is a Milanese rib knit sweater (ground yarn is 100% cotton with a count of 2/100).

(Example and comparative example)
In the knitting diagram of Milano rib knitting shown in Figure 1, only the ground yarn of rubber knitting (1 x 1 rib) in (1) is made of Mitsubishi Chemical Corporation's 50 denier "Japanese heat-sealing yarn 78T" (melting point 85°C). In this example, the sweater is produced by aligning the above-mentioned sweaters using a flat knitting machine, and the heat-fusible yarn is melted and fused to the base yarn using a steam iron. The sweater without the heat-fusible yarn is taken as a comparative example.

(Evaluation results)
After washing and drying the washing test method of the evaluation method once and after repeating the washing and drying 5 times, calculate the dimensional change rate for body length, body width, sleeve length, and hem width. It is shown in Table 1. Positive numbers represent "growth" and negative numbers represent "shrinkage."

After washing and drying the sweater of the comparative example once, the body length, body width, and sleeve length have shrunk, and the hem width has lengthened. After washing and drying the sweater of the comparative example five times, the body length and body width have shrunk, and the sleeve length and hem width have increased. After washing and drying the sweater of the comparative example five times, the amount of shrinkage in the length was as large as 6.3%.

On the other hand, the length, body width, sleeve length, and hem width of the sweater of the example were shrunk both after washing and drying once and after washing and drying five times.

After washing and drying the sweater of the example once, the amount of shrinkage of the body length, which has the largest amount of shrinkage, is 1.7%. This amount of shrinkage in body length (1.7%) was suppressed to about 57% compared to the amount of shrinkage in body length (3.0%) after one wash and drying of the sweater of the comparative example. Further, after washing and drying the sweater of the example five times, the amount of shrinkage of the garment length, which is the largest amount of shrinkage, was 3.7%. This amount of shrinkage in the length (3.7%) was suppressed to about 59% compared to the amount of shrinkage in the length of the sweater of the comparative example (6.3%) after washing and drying 5 times.

As described above, it can be seen that the sweater of the example has much higher shape stability after repeated washing and drying and the maximum amount of shrinkage is significantly smaller than the sweater of the comparative example.

<Effect>
The knit products according to the embodiments of the present invention as described above use natural fiber yarns and/or synthetic fiber yarns. Since the heat-fusible yarn is fused to all or part of the base yarn, which is a natural fiber yarn and/or a synthetic fiber yarn, expansion and contraction of the base yarn can be suppressed.

By knitting the heat-fusible yarn into all or part of the ground yarn, and producing a knit product in which the heat-fusible yarn is not melted, for example, by forming knitting using a flat knitting machine. , it is possible to efficiently produce a knit product in which the heat-fusible yarn is not melted while reducing the amount of yarn used and cutting loss.

The above description of the embodiments is all illustrative, and the present invention is not limited thereto. Various improvements and changes can be made without departing from the scope of the invention.

Claims

A knitted product using natural fiber yarn and/or synthetic fiber yarn,
A heat-fusible yarn that melts at 105°C or less is fused to all or part of the base yarn.
knitted products.
The knitted product is made using a flat knitting machine.
The knitted product according to claim 1.
The heat-fusible thread is a nylon heat-fusible thread with a melting point of 75°C or more and 90°C or less.
The knit product according to claim 1 or 2.
The fineness of the heat-fused yarn is 30 denier or more and 150 denier or less,
The knitted product according to claim 1.
While knitting a heat-fusible yarn that melts at 105°C or less into all or part of the ground yarn, which is a natural fiber yarn and/or a synthetic fiber yarn, the knit product in which the heat-fusible yarn is not melted is woven horizontally. The first step of manufacturing with a knitting machine,
A second step of melting the heat-fusible yarn with a steam iron for the knit product that has undergone the first step, and fusing the heat-fusible yarn to the ground yarn;
including,
Method of manufacturing knitted products.
The heat-fusible thread is a nylon heat-fusible thread with a melting point of 75°C or more and 90°C or less.
The method for manufacturing a knit product according to claim 5.