JP2015045102A - Knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a telescopic knitted fabric in which the temperature of the knitted fabric increases upon knitted fabric elongation, and heat evolution is maintained even if telescopic motion is continuously repeated.SOLUTION: Provided is a knitted fabric obtained by incorporating a non-elastic crimp-worked yarn in 5 wt.% or higher in a nonelastic yarn and also imparting an inorganic substance thereto, in which the heat evolution temperature in the longitudinal direction and the horizontal direction of the knitted fabric after 40% stretching is repeated at a speed of 100 times/min is 0.5°C or higher.

Description

  The present invention relates to a knitted fabric. More specifically, the present invention relates to a knitted fabric made of inelastic yarn, and the temperature of the knitted fabric itself rises when the knitted fabric is stretched, and the heat generation continues when the stretch is continuously repeated.

  Conventionally, as a knitted fabric whose temperature rises when worn, a knitted fabric that absorbs infrared rays and generates heat, a knitted fabric that absorbs moisture and generates heat, and the like have been proposed. However, in order to generate heat, external factors such as moisture and light are necessary, and there is a problem that heat is not generated without external factors.

In response to this problem, Patent Document 1 discloses a knitted fabric that contains 40 g / m ² or more of elastic yarn and inserts and knits the elastic yarn in the warp direction of the knitted fabric, thereby generating heat instantaneously at 100% elongation. The ground is listed. Patent Document 2 discloses that a warp knitted fabric containing 40 g / m ² or more of elastic yarn, at least a part of the elastic yarn is knitted with a looping structure, and the elastic yarns are fixed at the intersection of the elastic yarns. A knitted fabric that generates heat instantaneously at 100% elongation is described. However, a knitted fabric using elastic yarn is not only difficult to knit, but also difficult to manage temperature during pretreatment and presetting, and process management during dyeing. Moreover, when an actual wearing condition is considered, there is no body part which extends 100%, and it is lacking in practicality.

JP 2011-195970 A JP 2012-1112078 A

  The present invention has been made in view of such a current situation, and provides a knitted fabric in which heat generation is sustained when the temperature of the knitted fabric itself rises when the knitted fabric is stretched and continuously expands and contracts. is there.

  The present invention is a knitted fabric formed by adding 5% by weight or more of a crimped yarn of an inelastic yarn to a knitted fabric made of an inelastic yarn and adding an inorganic substance at a rate of 100 times / minute. The knitted fabric has a heat generation temperature of 0.5 ° C. or more in the warp direction and the lateral direction of the knitted fabric after 40% elongation is repeated three times or more.

The fineness of the inelastic yarn is preferably 15 dtex or more and 300 dtex or less.
Moreover, it is preferable that the stress at 40% elongation is 300 cN or less in the vertical direction and 30 cN or less in the horizontal direction.

  ADVANTAGE OF THE INVENTION According to this invention, when the temperature of knitted fabric itself rises at the time of knitted fabric expansion | extension, and the expansion and contraction is repeated continuously, the knitted fabric which generates heat continuously can be provided.

  The knitted fabric of the present invention is a knitted fabric formed by adding 5% by weight or more of a crimped yarn of inelastic yarn to a knitted fabric made of inelastic yarn, and adding an inorganic substance, 100 times / minute The exothermic temperature at the time of 40% elongation in the warp direction and the horizontal direction of the knitted fabric after repeating 40% elongation at a speed of 3 times or more is 0.5 ° C. or more.

  The exothermic temperature at the time of 40% elongation of the knitted fabric in the present invention is that the knitted fabric is stretched by 40% in one direction using a repetitive stretching tester under the condition that it receives no external energy supply other than stretching. Next, the process of returning to the original length is repeated once, and the temperature of the knitted fabric at 40% elongation after stretching 3 times and 50 times is measured by thermography, and the difference from the knitted fabric temperature before starting the test. It is a value calculated from

  If the knitted fabric temperature after repeating 40% elongation three times is higher than the knitted fabric temperature before the start of the test, it indicates that heat is generated instantaneously. Since the friction between the loops continues while continuing to expand and contract continuously as it is, heat generation is maintained and the knitted fabric temperature does not significantly decrease. In the knitted fabric of the present invention, the exothermic temperature at 40% elongation in the warp direction and the horizontal direction of the knitted fabric after repeating 40% elongation three times or more at a rate of 100 times / minute is 0.5 ° C. or more, Preferably it is 1 degreeC or more. If the heat generation temperature is 0.5 ° C. or higher, heat generation can be felt when wearing clothes. Further, the higher the exothermic temperature, the better, and the upper limit is not particularly limited as long as it does not adversely affect the human body, but it is preferably 10 ° C or lower, more preferably 5 ° C or lower. When the heat generation temperature is 10 ° C. or lower, not only can the heat be felt when wearing clothes, but also the texture such as the touch is good.

  In the knitted fabric of the present invention, the exothermic temperature at 40% elongation in the warp direction and the horizontal direction of the knitted fabric after repeating 40% elongation at a rate of 100 times / min. The knitted fabric is adhered with an inorganic substance that hinders movement between loops. Since an inorganic substance that hinders movement between loops adheres to the knitted fabric, the coefficient of friction between the loops of the knitted fabric increases, and the heat generation temperature increases.

  The inorganic substance used in the present invention is not particularly limited as long as the coefficient of friction is increased, and examples thereof include silica, zeolite, and titanium oxide. Of these, silica as the main component is preferable from the viewpoint of cost and feel of the knitted fabric after processing.

  The average particle size of the inorganic substance is preferably 10 to 100 nm, and more preferably 20 to 30 nm. If it is 10 nm or more, the movement between loops is inhibited, so that sufficient heat generation can be obtained. Moreover, if it is 100 nm or less, the movement between loops will not be inhibited completely, and the texture of the knitted fabric after processing will not be impaired.

  In the present invention, an anti-slip agent containing an inorganic substance having an average particle diameter of 20 to 30 nm may be used. For example, commercially available “NC-66” (Takamatsu Yushi Co., Ltd.), which is an anti-slip agent in which colloidal silica as a main component is dispersed in water, can be used.

  The use concentration of the anti-slip agent containing the inorganic substance is preferably 0.5 to 10% ows, and more preferably 1 to 5% ows. If the use concentration of the anti-slip agent is 0.5% ows or more, the movement between the loops is inhibited, so that sufficient heat generation can be obtained. Moreover, if it is 10% ows or less, textures, such as the touch of the knitted fabric after a process, will not be impaired.

  Furthermore, in order to improve washing durability, it is preferable to use a fixing agent in combination to firmly fix the inorganic substance between the loops.

  The sticking agent used is not particularly limited, and is a solvent volatile type curable type such as natural polymers such as chitin, chitosan, sodium alginate, chloroprene rubber, synthetic rubber latex, vinyl acetate resin emulsion, acrylic resin emulsion, etc. Examples include adhesives, urea resin-based, melamine-urea copolymer resins, phenolic resin-based, resorcinol resin-based, chemically reactive curable adhesives such as urethane resins and epoxy resins. These fixing agents may be used alone or in combination, and an isocyanate, epoxy, or melamine crosslinking agent may be used in combination in order to improve adhesion and washing durability.

  The inelastic yarn used in the present invention is not particularly limited as long as it is a synthetic fiber yarn, and examples thereof include polyester fibers such as polyester and polytrimethylene terephthalate, polyamide fibers, and polypropylene. Further, these bright yarns, semi-dal yarns, full-dal yarns, and the like can be arbitrarily used. Further, the cross-sectional shape of the fiber is not particularly limited, and a round shape, an elliptical shape, an M shape, an X shape, a hollow fiber and the like can be arbitrarily used, and further, a long fiber, a spun yarn, and a blended yarn can be used. .

  The inelastic yarn used in the present invention contains 5% by weight or more of a crimped yarn that has been subjected to processing such as woolly or pin false twisting from the viewpoint of heat generation during repeated elongation. The more the crimped yarn is contained, the higher the exothermic temperature becomes, so that the content is preferably 10% by weight or more. If the crimped yarn is contained in the knitted fabric in an amount of 5% by weight or more, the raw yarn may be contained within a range that does not affect the heat generation effect during repeated stretching.

  The fineness of the inelastic yarn used in the present invention is preferably 15 to 300 dtex, and more preferably 30 to 200 dtex in terms of texture and thickness.

  In addition, when the knitted fabric is sewn and worn on the garment, the knitted fabric expands and contracts with a relatively weak force, so that a comfortable wearing feeling and a sufficient heat generation effect are exhibited. Therefore, the stress at 40% elongation is 300 cN in the vertical direction. It is preferable that the horizontal direction is 30 cN or less.

  The knitted fabric of the present invention can be produced by any method such as a warp knitting machine, a circular knitting machine, a flat knitting machine, and a knitting machine capable of jacquard knitting, and is not particularly limited.

  The knitted fabric of the present invention can be pretreated, dyed and the like by a known method.

  The use of the knitted fabric of the present invention is not particularly limited, but it is suitably used for clothing such as sports and innerwear. Then, if the knitted fabric of the present invention is sewn to the garment, the knitted fabric is stretched by folding or stretching of the arm, etc., so that it generates heat of 0.5 ° C. or more and is warm while the body is moving. A sustainable product is obtained.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to an Example. In addition, each characteristic value in an Example and a comparative example was measured with the following method.

(1) Exothermic temperature at 40% elongation The exothermic temperature at 40% elongation is measured by repeatedly stretching the knitted fabric by 40% in one direction using a stretch tester and then returning it to its original length. This is a value calculated from the difference from the knitted fabric temperature before the start of the test by measuring the knitted fabric temperature at 40% elongation after performing 3 times and 50 repeated stretches once.
Repeated stretch tester: Fatigue durability tester (manufactured by Kato Tech Co., Ltd.)
Sample size (excluding the gripping part): width 50 mm, length 70 mm
Measurement environment: constant temperature and humidity chamber with a temperature of 20 ° C. and a humidity of 65% RH Extension amount: 40% in the length direction
Repeated expansion / contraction cycle: 100 times / min Thermography camera: Ti30 THERMAL IMAGER (manufactured by FLUKE Corporation)

(2) Stress at 40% elongation The stress at 40% elongation is evaluated by the following method.
Universal tensile testing machine: Shimadzu Autograph AG-IS MO type series (manufactured by Shimadzu Corporation)
Sample size (excluding grip): width 25 mm, length 100 mm
Tensile speed: 150 mm / min Measurement: Obtain stress at 40% elongation under the above conditions.

[Prescription A]
NC-66 (Anti-slip agent, manufactured by Takamatsu Yushi Co., Ltd.) 1.5% ows
Pluscoat Z-561 (sticking agent, manufactured by Kyoyo Chemical Co., Ltd.) 1.0% ows
Nice pole FE-26 (Antistatic agent, manufactured by Nikka Chemical Co., Ltd.) 0.5% ows

[Example 1]
Using a single circular knitting machine, a knitted fabric of Swiss pique is knitted using a 56 dtex / 24 filament semi-dal polyester raw yarn and an 84 dtex / 36 filament semi-dull polyester woolly crimped yarn (shown as Woolie in Table 1). did. At that time, the mixture ratio of the crimped yarn was 25%. The knitted fabric was scoured, preset, dyed and temporarily dried by a known method. At the time of final finishing, Formulation A was padded at a pickup rate of 70% and set at 135 ° C. for 90 seconds to obtain the knitted fabric of Example 1.

[Example 2]
Using a single circular knitting machine, a 84 dtex / 36 filament semi-dal polyester raw yarn, a 120 dtex / 72 filament cationic dyed polyester woolly crimped yarn and an 84 dtex / 36 filament semi-dull polyester pin false twist crimped yarn (table In Example 1, a knitted fabric of Example 2 was obtained in the same manner as in Example 1 except that the knitting structure knitted a micro Kanoko knitted fabric. In addition, the mixture ratio of the crimped yarn was 15%.

[Example 3]
Using a single circular knitting machine, a 56 dtex / 72 filament full dull polyester 1 heater yarn (shown as 1H in Table 1) and a 56 dtex / 24 filament semi-dull polyester woolly crimped yarn, A knitted fabric of Example 3 was obtained in the same manner as Example 1 except that the knitted fabric was knitted. The blend ratio of the crimped yarn was 12.5%.

[Example 4]
A single circular knitting machine was used to knitted a mini-mesh knitted fabric using a 84 dtex / 72 filament full dull polyester 1 heater yarn and a 56 dtex / 24 filament semi-dull polyester woolly crimped yarn. A knitted fabric of Example 4 was obtained in the same manner as Example 1. The blend ratio of the crimped yarn was 5%.

[Example 5]
Using a single circular knitting machine, a knitting structure using 84 dtex / 36 filament full-dal polyester 1 heater yarn, 84 dtex / 24 filament semi-dull polyester woolly crimped yarn and 78 dtex / 24 filament nylon woolly crimped yarn A knitted fabric of Example 5 was obtained in the same manner as in Example 1, except that knit a mesh knitted fabric. In addition, the mixture ratio of the crimped yarn was 20%.

[Comparative Example 1]
Using a single circular knitting machine, using a 90 dtex / 72 filament semi-dal polyester raw yarn and a 56 dtex / 24 filament semi-dal polyester 1 heater yarn without using crimped yarn, a knitted fabric with a knitted structure is made of tengu. A knitted fabric of Comparative Example 1 was obtained in the same manner as Example 1 except that the knitting was performed.

[Comparative Example 2]
A knitted fabric of Comparative Example 2 was obtained in the same manner as in Comparative Example 1, except that the prescription A was not padded at the time of final finishing.

[Comparative Example 3]
A knitted fabric of Comparative Example 3 was obtained in the same manner as in Example 1 except that the formulation A was not padded at the time of final finishing.

[Comparative Example 4]
A knitted fabric of Comparative Example 4 was obtained in the same manner as in Example 1 except that the content of the crimped yarn was 3.6%.

Table 1 shows the stress and heat generation temperature at 40% elongation of the knitted fabrics obtained in [Examples 1 to 5] and [Comparative Examples 1 to 4].

Claims (3)

  A knitted fabric made of inelastic yarn, containing 5% by weight or more of crimped yarn of inelastic yarn and added with an inorganic substance, and stretches 40% at a rate of 100 times / minute. A knitted fabric having a heat generation temperature of 0.5 ° C. or more in the vertical direction and the horizontal direction of the knitted fabric after repeating three or more times.   The knitted fabric according to claim 1, wherein the fineness of the inelastic yarn is 15 dtex or more and 300 dtex or less.   The knitted fabric according to claim 1 or 2, wherein the stress at the time of 40% elongation is 300 cN or less in the warp direction and 30 cN or less in the width direction.