JP2000170061A - Windbreaking knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a knitted fabric with excellent windbreaking and thermal insulation performance, having puffy feeling, soft touch and lightweight feeling without impairing the characteristics inherent therein, therefore suitable as a piece of autumn/winter clothing. SOLUTION: This knitted fabric is composed of heteroshrink composite multifilament yarns >=5% in thermal shrinkage difference; wherein the low- shrink constituent multifilament yarns is composed of single filaments each having a modified cross-section shape >=1.2 in peripheral length ratio Lr. This knitted fabric has a cover factor of 15,000-60,000 and air permeability of <=70 cc/cm2/sec.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a windproof knitted fabric used for general clothing, sports clothing and the like.

[0002]

2. Description of the Related Art Generally, a knitted fabric has a very high air permeability as compared with a woven fabric or the like, and has a drawback that when used as a fall / winter product, the wind easily passes and a wearer feels cold. A knitted fabric for clothing having low air permeability can be obtained by knitting the knitted fabric at a high density. However, there is a limit to the gauge of the knitting machine, and there is a limit to a method of knitting at a high density to obtain a knitted fabric with reduced air permeability.

[0003] In order to overcome the above-mentioned disadvantages of knitted fabrics for clothing, several methods for reducing the air permeability of the knitted fabric have been proposed. One of the methods is to coat the back surface of the knitted fabric with a resin or attach a film. For example, Japanese Utility Model Laid-Open No. 63-50891 discloses a resin coating applied to the surface of a high-gauge knitted fabric of a double-gauge knitted fabric made of different gauges to reduce air permeability and impart windproofness and heat retention. The knitted fabric is described. However, although this method has a great effect of reducing the air permeability, it has a drawback that the texture of the knitted fabric is made coarse and hard, and the inherent elasticity of the knitted fabric is also reduced.

[0004] Attempts to reduce air permeability by laminating a high-density woven fabric on the back surface of a knitted fabric are also known. Although the air permeability of the knitted fabric based on this idea is reduced, the knitted fabric is bulky and the original elasticity of the knitted fabric cannot be utilized. Japanese Patent Publication No. 58-773
As described in Japanese Patent Publication No. 8 (KOKAI) No. 8, a method of applying calendering to a knitted fabric is also known. This method calenders a knitted fabric inserted between stitches in the course direction as a weft using a composite yarn of an elastic fiber yarn and a bulky crimped yarn,
The idea is that the stretchable composite yarn is set in a state where the stretchable composite yarn is spread in the stitch, and the air permeability is reduced by closing the gap of the stitch and dividing the stitch. However, in this method, since the fabric is subjected to heat and pressure processing, the appearance, texture, and the like of the knitted fabric are impaired.

Japanese Utility Model Publication No. Sho 62-11981 discloses a method in which a highly crimped yarn is used as a constituent yarn of a knitted fabric. In this method, the inner layer loop and the outer layer loop of a double-sided knitted fabric are knitted with a high crimped yarn, and the voids in the knitted fabric structure are reduced by the high crimped yarn. According to this idea, a knitted fabric having a soft texture can be used to obtain a knitted fabric with low air permeability, but the effect of reducing the air permeability of the obtained knitted fabric is small.

Japanese Utility Model Registration No. 2567438 proposes a method using a high shrinkage yarn. This method heat-treats a knitted fabric obtained using air-blended high-shrinkage yarns or high-shrinkage yarns and false-twisted yarns on the skin surface to increase the cover factor of the knitted ground, thereby improving ventilation. The idea is to obtain a knitted fabric with good touch by reducing the properties. However, in this method, even when the high shrink yarn alone can increase the cover factor to reduce the air permeability, the texture becomes coarse and hard. In addition, in the case of the composite yarn, since a normal yarn (generally a high crimped yarn composed of a single yarn having a round cross section) is used as the false twisting yarn, the cover factor is increased to reduce the air permeability, and Even if an attempt is made to obtain a good knitted fabric, the knitted fabric has a swelling property, lacks soft touch properties, and has a rich texture unique to processed yarn, and thus cannot be said to be sufficient for clothing.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a knitted fabric which has a swelling / soft touch feeling and a light weight feeling and which is excellent in windproof and heat insulating performance without impairing the stretch characteristics of the knitted fabric. The purpose is to provide.

[0008]

That is, the present invention relates to a knitted fabric.
Having at least one layer of a heat shrinkage difference of 5% or more
A knitted fabric composed of a composite yarn, the composite yarn comprising
The circumferential ratio Lr obtained by the following equation is 1.2.
Multifilament consisting of a single yarn of irregular cross section
Cover yarn of a knitted fabric layer using the composite yarn.
15,000 to 60,000 and the air permeability of the knitted fabric is
70cc / cm^Two/ Sec or less
Lr = L which is a windproof knitted fabric₁/ L_Two (However, L in the formula₁Is the single yarn circumference (cm) of the low shrinkage component yarn
Represents, L_TwoIs the cross-sectional area S of the single yarn of the low shrinkage component yarn.₁(Cm^Two)
Represents the circumference (cm) of a circular section having the same area as _Two= 2
× (π × S₁)^0.5Is calculated.)

The windproof knitted fabric according to the present invention has an air permeability (JI
70cc / c by SL1096 Frazier method)
m ² / sec or less, preferably 50cc / cm ² / se
c or less. Air permeability is 70 cc / cm ² / se
If c is exceeded, when worn in a windy state (especially in a strong cold wind), a cold wind will enter the clothes and become difficult to withstand the cold.

[0010] The knitted fabric according to the present invention comprises one or more layers of knitted fabric and can be prepared using various knitting structures such as flat knitting, circular knitting, warp knitting and the like. do it. In the present invention, at least one layer of the knitted fabric is composed of a different shrinkage composite yarn having a difference in heat shrinkage of 5% or more. The layer of the composite yarn can be constituted by the entire knitted fabric, or a single-sided layer, a double-sided layer, or a middle layer of the knitted fabric, or a layer formed by inlaying any of these layers. This composite yarn is composed of a low shrinkage component yarn and a high shrinkage component yarn, and the difference in heat shrinkage between the two yarns is 5% or more, preferably 10 to 25%. The composite yarn may have three or more types of yarns as long as at least two types of yarns satisfy a difference in thermal shrinkage of 5% or more.

In the knitted fabric using the composite yarn, the high shrinkage component yarn is greatly shrunk by the subsequent scouring (70 to 100 ° C.) and dyeing (100 to 130 ° C.), and the knitted fabric is substantially shrunk. Then, the stitches are filled, and as a result, the knitted fabric has a reduced air permeability due to an increase in its cover factor. On the other hand, the low-shrinkage component yarn has a small shrinkage, and as a result, the high-shrinkage component yarn forms a core and forms a three-dimensional bulging structure so that the low-shrinkage component yarn is wound around the core. A bulky knitted fabric covered with the low shrinkage component yarn and given the characteristics of the low shrinkage component yarn itself.

If the difference in heat shrinkage between the two yarns is less than 5%, sufficient swelling cannot be obtained, and if it exceeds 25%, the swelling is too large and the physical properties such as snags are inferior. The high shrinkage component yarn preferably has a heat shrinkage of 10 to 30%. If the heat shrinkage is less than 10%, the knitted fabric does not shrink sufficiently, and it is not possible to reduce the air permeability. If it exceeds 30%, the shrinkage of the knitted fabric is too large, and the texture becomes coarse and hard.

The term "heat shrinkage ratio" as used herein means that an initial load (0.1 g / d) is applied to a sample, the length of the sample is measured at 500 mm, and two points are marked. After being treated in hot water for 30 minutes, dehydrated and air dried, an initial load is applied again, the length (L) between two points is measured, and the heat shrinkage is calculated by the following equation. Heat shrinkage (%) = ((500−L) / 500) × 100 In the present invention, the low shrinkage component yarn of the composite yarn needs to have a circumference ratio Lr obtained by the following formula of 1.2 or more. It is.

Lr = L ₁ / L ₂ (where L ₁ represents a single yarn perimeter (cm) of the low shrinkage component yarn, and L ₂ is a single yarn cross-sectional area S ₁ (cm ² ) of the low shrinkage component yarn. Represents the circumference (cm) of a circular cross-section yarn of the same area, L ₂ = 2
× (π × S ₁ ) ^0.5 ) By setting the circumference ratio Lr to 1.2 or more, the gap between the single yarns and the single yarns becomes extremely large, and the swelling and heat insulation when knitted are made. improves. Also, the low shrinkage component yarns between the knitting yarns form a micro-random air layer because the single yarn bundle is small, and the knitted fabric feel is soft. In addition, when the circumference ratio Lr is less than 1.2, the gap between the single yarns and the single yarns decreases, and the heat retention becomes insufficient. If the circumference ratio Lr exceeds 2.5, poor spinnability or non-uniform cross-sectional shape during yarn production may occur, and the circumference ratio Lr is preferably 1.3 to 2.5.
Is preferably used.

In the present invention, it is preferable that the low shrinkage component yarn is a modified yarn having a concave portion in a cross section of a single yarn in order to satisfy the perimeter ratio. By having the concave portion in the cross section of the single yarn, the gap between the single yarn and the single yarn increases. As the cross-sectional shape of the yarn, for example, a circular, triangular, polygonal or other cross-sectional shape with a concave portion formed therein, or an L-shaped, T-shaped, Y-shaped, W-shaped,
An irregular shape such as an H type, a π type, a ten type, a # type, a * type, a Yaba type, a dog bone type, or a cross sectional shape having a hollow portion in these yarns can be used.

In the present invention, it is preferable to use a multifilament yarn as the low shrinkage component yarn from the viewpoint of soft touch feeling and reduction of air permeability. The constituent single yarn is 0.5 ~
2.0 denier and 30 to 200 denier yarn are preferably used. If the single yarn is less than 0.5 denier, poor spinnability or uneven cross-sectional shape is caused. If it exceeds 2.0 denier, soft touch properties and air permeability are inferior. On the other hand, if the yarn is less than 30 denier, poor spinnability and poor cross-sectional morphology occur, and if it exceeds 150 denier, the knitted fabric becomes heavy and unsuitable for clothing.

The low-shrinkage component yarn is preferably a crimped yarn in order to further increase the voids between the single yarns to give a feeling of swelling, soft touch property and dry touch property. The crimp elongation of the crimped yarn is 20% or less, preferably 0.5 to 15%. If the crimp elongation is less than 0.5%, the feeling of swelling and the heat retention are reduced, and dry touch properties cannot be obtained. If it is larger than 20%, it swells,
Although the heat retaining property is increased, the texture is unique to false twisted yarn.

[0018] The crimped yarn is a commonly used pin,
It can be obtained by a false twisting method using a nip belt, a disk, etc., a shaping method using an edge, a shaping method using a gear, a knit denit, or a pressing method, a high pressure air jet method, a composite crimping method, etc. Control,
The false twist method is preferred from the viewpoint of uniformity, productivity and the like. In order to reduce the crimp of the processed yarn in this false twisting method, low-temperature false twisting in which the false twisting temperature is set to 120 to 180 ° C. by a one-heater method, and low twisting false twist in which the number of false twists is reduced by 10 to 40% as compared with a normal twist This can be achieved by a twisting method or a two-heater false twisting method in which a false twisted yarn treated by a first-stage heater by a two-heater method is reheat-treated by a second-stage heater to reduce crimp.

The low shrinkage component yarn constituting the composite yarn /
The fineness ratio of the high shrinkage component yarn is preferably 1.0 to 4.0.
When the fineness ratio is less than 1.0, the amount of the low shrinkage component yarn is too small, the bulkiness is high, and a soft texture cannot be obtained. The fineness ratio is 4.0
If it exceeds, the amount of the low-shrinkage component yarn is too large, and the texture becomes stiff. The fineness of the high shrinkage component yarn is 10 to 100.
Denier, preferably 20 to 50 denier. 10
If it is less than denier, the heat shrinkage stress is small and it is difficult to densify the knitted fabric. If it exceeds 100 denier, the heat-shrinkable yarn increases and the knitted fabric becomes coarse and hard. The fineness of single yarn is 1-5
Denier is preferred. If it is less than 1 denier, the knit of the knitted fabric is insufficient, and if it exceeds 5 denier, the texture of the knitted fabric becomes coarse and hard.

The composite yarn used in the present invention can be prepared by a method such as twisting, covering, air blending, false twisting, composite spinning or spinning blending. A structure in which a low-shrinkage component yarn is disposed around a shrinkage component yarn, that is, a core-sheath structure of a high-shrinkage component yarn in a core and a low-shrinkage component yarn in a sheath is preferable. Further, in the present invention, the cover factor of the knitted fabric layer using the composite yarn is 15,000 to 60,000, preferably 20,000 to
50,000. Here, the cover factor (K) is
K = W × C × D ^1/2 W is the well density (lines / inch),
C indicates the course density (book / inch), and D indicates the thickness of the yarn (denier). If the knitted fabric has a staggered or striped pattern and different materials are exposed on the surface, W1, W2,..., C1, C2.
Is calculated by the following equation. K1 = W1 x C1
× D1 ^1/2 , K2 = W2 × C2 × D2 ^1/2 ...
= K1 + K2 +... If the cover factor is less than 15,000, the stitch is coarse and the desired air permeability cannot be obtained. Cover factor of 60000
If it exceeds, the stitch is too dense and the texture becomes coarse and hard. Note that the cover factor referred to here is a product knitted fabric that has been subjected to a heat treatment (finished and dyed).

The density of the knitted fabric in the present invention is 0.1
0 to 0.25 g / cm ³ is preferred. 0.10g density
If it is less than / cm ³ , the air gap is too large to reduce the ventilation. If it exceeds 0.25 g / cm ³ , the texture becomes coarse and hard, and the weight cannot be reduced. The calculation of the density of the knitted fabric referred to in the present invention is obtained by measuring the weight and thickness of the knitted fabric and calculating the following formula.

Density (g / cm ³ ) = weight (g / cm ² )
/ Thickness (cm) As the low shrinkage component yarn used in the present invention, polyester fibers and polyamide fibers are preferable in view of processing characteristics and physical properties. In particular, polyester fibers are more preferable because they have good texture, wrinkle resistance, washing resistance, and dimensional stability.
The polyester fiber is, for example, a fiber of a polyester copolymer which may contain other copolymer components in addition to polyethylene terephthalate, polybutylene terephthalate, and a copolymer thereof. Examples of such a copolymer component include aliphatic dicarboxylic acids (such as oxalic acid and adipic acid), alicyclic dicarboxylic acids (such as cyclohexane dicarboxylic acid), and aromatic dicarboxylic acids (such as isophthalic acid and sodium sulfoisophthalic acid). ), Aliphatic glycols (ethylene glycol, 1,2
Propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexanediol, etc.), aromatic dioxy compounds (hydroquinone bisphenol A, etc.), aliphatic glycols containing aromatics (1,
4-bis (β-hydroxyethoxy) benzene, etc.),
Examples thereof include polyether glycols (eg, polyethylene glycol and polypropylene glycol), aliphatic oxycarboxylic acids (eg, ω-oxycaproic acid), and aromatic oxycarboxylic acids (eg, p-oxybenzoic acid). Compounds having one or more ester-forming functional groups (such as benzoic acid or glycerin) can also be used in a range where the polymer is substantially linear. Further, two or more of these copolymer components may be copolymerized.

On the other hand, examples of the high shrinkage component yarn include polyester obtained by copolymerizing a third component such as isophthalic acid, sulfoisophthalic acid, diethylene glycol, and 2,2-bis (4- (2-hydroxyethoxy) phenyl) propane. A single component yarn such as a cationic dyeable polyester or polybutylene terephthalate copolymerized with dimethyl (5-sodium sulfo) isophthalic acid, or a single component yarn of the single component yarn and a polyester copolymerized with ordinary polyethylene terephthalate or other components. Composite spinning (for example, conjugate yarn of side-by-side type, eccentric type, etc.) or mixed spun yarn can be used.

These low-shrink component yarns and high-shrink component yarns may have a matting agent such as titanium dioxide, a stabilizer such as phosphoric acid, an ultraviolet absorber such as a hydroxybenzophenone derivative, a zirconia, alumina,
Silica, titanium oxide, barium sulfate, calcium carbonate,
UV shielding agents such as boron nitride, strontium aluminate, and zinc sulfide; heat storage agents such as titanium nitride, zirconium carbide, titanium carbide, hafnium, tantalum, antimony-containing tin oxide, indium-containing tin oxide, and carbon;
Crystal nucleating agents such as talc, lubricating agents such as Aerosil, antioxidants such as hindered phenol derivatives, flame retardants, antistatic agents, pigments, fluorescent brighteners, infrared absorbers, heat-resistant agents, phosphorescent agents, and antibacterial agents Alternatively, a functionalized yarn containing an additive such as a deodorant may be used.

In the knitted fabric of the present invention, other yarns can be used in addition to the composite yarn. The yarn to be used in combination is not particularly limited, and may be appropriately selected depending on the use, function, and the like. For example, natural fibers such as cotton, hemp, wool, and silk, regenerated fibers such as rayon, semi-synthetic fibers such as acetate, and synthetic fibers such as polyester, polyamide, polyacryl, polyethylene, and polyvinyl chloride can be used.

Further, the knitted fabric of the present invention may have a water absorbing agent, a water repellent, a heat storage agent, an ultraviolet shielding or absorbing agent, an antistatic agent, an antibacterial agent, a deodorant, an insect repellent, a luminous agent, depending on the use and form of use. The function may be imparted by various processes such as a retroreflective agent. Further, physical processing such as brushing for imparting fluff, calendering for patterning, embossing, and the like may be performed.

The windproof knitted fabric of the present invention obtained by the above-described structure can reduce the air permeability while maintaining the stretch characteristics of the knitted fabric, and has a swelling, soft touch feeling and light weight feeling. Thus, it is possible to obtain a knitted fabric having excellent windproof and heat insulating properties, and it is extremely excellent as a fall / winter material for sports clothing including general clothing. In addition, by using the composite yarn of the present invention, a knitted fabric having a high cover factor can be obtained, and therefore, there is a great effect on UV cut properties (ultraviolet ray shielding properties).

[0028]

Embodiments of the present invention will be described below. The data measuring method used in the present invention is as follows. (1) Crimp elongation rate (%): 0.3
After heat treatment at 90 ° C. for 15 minutes under a load of mg / d, the yarn was removed from the skein which had been left unloaded for 24 hours, and an initial load (2 mg / d) was applied. Remove the initial load after marking between points,
Then, after applying a load (0.1 g / d), the length (L) between the two points is measured after 30 seconds, and the crimp elongation is calculated by the following equation.

Crimp elongation (%) = ((L−200) / 2
00) × 100 (2) Windproofness: Measure the wind speed (m / sec) on the back surface of the fabric when the wind is blown on the fabric surface at a wind speed of 10 m / sec. (3) Heat retention: Using a Thermolab II (manufactured by Kato Tech), set the hot plate at 32 ° C (△ T22 ° C) under an environment of 10 ° C, attach the dough by the space method (gap 10 mm), and attach it to the dough surface. The amount of heat loss (W / m ² ° C) when blowing a wind at a wind speed of 10 m / sec is measured (the smaller the value, the higher the heat retention).

(4) Swelling: The thickness is evaluated under a load of 0.5 g / cm ² . (5) Light weight: Weight (g / cm ² ) and thickness (cm) are measured, and weight / thickness = density (g / cm ³ ) is calculated.

(6) UV-cutting property: UV transmittance (integral value%) in a wavelength range of 280 to 400 nm is measured using a spectrophotometer equipped with an integrating sphere (manufactured by Shimadzu Corporation) and determined by the following equation. UV shielding property (%) = 100−UV average transmittance [Examples 1 to 3, Comparative Examples 1 and 2] As a low shrinkage component yarn,
A round section having a circumference ratio Lr of 1.00, 1.30, 1.8
A multifilament drawn yarn 75d / 72f made of polyethylene terephthalate single yarn having a π-shaped cross section of 0, 2.30, 2.70 is spun and subjected to false twist processing by a nip belt method under the following conditions (heat Shrinkage 2%, crimp elongation 5%). On the other hand, as a high shrinkage component yarn, 30d
An isophthalic acid copolymerized polyester multifilament drawn yarn having a / 12f round cross section (heat shrinkage of 20%) was spun.

Next, both yarns were aligned, and over-feed 1.5% and air pressure 2.0
A hetero-shrinkage composite yarn entangled and mixed under Kgf / cm ² (difference in heat shrinkage 1.8%) was obtained. The knitting of the composite yarn with a 28-gauge circular knitting machine to form a jersey fabric, followed by a scouring dyeing treatment (130
C. * 30 minutes), set the cover factor to 35,000, and finish set (180
C) was prepared.

The test results are shown in Table 1.
The swelling was small and lacked softness, and there was no light feeling. Moreover, ventilation was large and it was inferior to windproof heat retention. In Comparative Example 2, knitting could not be performed because of fluff. On the other hand, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties. Further, the ultraviolet shielding property was also good.

[0034]

[0035]

[Table 1]

Example 4, Comparative Examples 3 and 4 As a low shrinkage component yarn, a multifilament drawn yarn 75d / 186f (single yarn) made of a single yarn of polyethylene terephthalate having a π-shaped cross section having a circumference ratio Lr of 1.80. Thread 0.40d), 75d
/ 108f (single yarn 0.69d) and 75d / 30f (single yarn 2.50d) were spun and subjected to false twisting under the same conditions as in Examples 1 to 3 above (all heat shrinkage 2% , Crimp elongation rate 5%).

On the other hand, as a high shrinkage component yarn, 30d / 12f
An isophthalic acid copolymerized polyester multifilament drawn yarn having a round cross section (heat shrinkage 20%) was spun. Then, both yarns were aligned in the same manner as in Examples 1 to 3, and a different shrinkage composite yarn (a difference in heat shrinkage of 18%) entangled and mixed by an interlace method was prepared and subjected to a knitting finish treatment.
As shown in the test results in Table 2, Comparative Example 3 was difficult to knit due to frequent fluff. In Comparative Example 4, the texture was coarse and hard, the ventilation was large, and the windproof and heat insulating properties were poor. On the other hand, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties. Further, the ultraviolet shielding property was also good.

[0038]

[Table 2]

Examples 5 to 6 and Comparative Examples 5 to 6 As a low shrinkage component yarn, a multifilament drawn yarn 75 of polyethylene terephthalate having a π-shaped cross section having a circumference ratio of 1.80.
Processed yarn obtained by spinning d / 72f and performing false twisting under the same conditions as in Examples 1 to 3 (heat shrinkage 2%, crimp elongation 5%)
I got On the other hand, as a high shrinkage component yarn, a 30d / 12f round cross-section isophthalic acid copolymerized polyester multifilament drawn yarn has a heat shrinkage of 5%, 15%, 25%, and 35%.
Was prepared. Next, different shrinkage composite yarns (different in heat shrinkage of 3%, 13%, 23%, and 33%, respectively) entangled and mixed by the interlace method in the same manner as in Examples 1 to 3 above were prepared, and knitting finishing treatment was performed. Was done.

The test results are shown in Table 3, as shown in Comparative Example 5
Had a rough and hard texture, a large ventilation, and inferior windproof and heat insulating properties. Comparative Example 6 was excellent in windproof and heat insulating properties, but the texture was coarse and hard. On the other hand, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties.

[0041]

[Table 3]

Examples 7 to 8 and Comparative Examples 7 to 8 As a low shrinkage component yarn, a multifilament drawn yarn 75 of polyethylene terephthalate having a π-shaped cross section having a circumference ratio of 1.80.
Processed yarn obtained by spinning d / 72f and performing false twisting under the same conditions as in Examples 1 to 3 (heat shrinkage 2%, crimp elongation 5%)
I got On the other hand, as a high shrinkage component yarn, a 30d / 12f round cross-section isophthalic acid copolymerized polyester multifilament drawn yarn (heat shrinkage 20%) was spun. Next, a different shrinkage composite yarn (heat shrinkage shrinkage difference of 20%) in which both yarns were drawn and entangled and mixed by an interlacing method in the same manner as in Examples 1 to 3 was adjusted, and the knitting density was adjusted with a 28 gauge circular knitting machine. After changing the knitted fabric, performing a scouring dyeing treatment (130 ° C. * 30 minutes), a finishing set (180 ° C. treatment), and a cover factor of 13,000, 18,000, 56000,
68000 knitted fabrics were created.

As shown in Table 4, as shown in Table 4, Comparative Example 7 had large ventilation and was inferior in windproof and heat insulating properties. Comparative Example 8
Had excellent windproof and heat insulating properties, but had a rough and hard texture. On the other hand, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties. Further, the ultraviolet shielding property was also good.

[0044]

[Table 4]

Example 9 As a low shrinkage component yarn, a multifilament drawn yarn 75d / 60f of polyethylene terephthalate having a W-shaped cross section with a circumference ratio Lr of 1.50 was spun and spun under the same conditions as in Examples 1 to 3. In this manner, a textured yarn (heat shrinkage 2%, crimp elongation 5%) subjected to false twisting was obtained.

On the other hand, dimethyl (5-
Copolymerized polyester (ηsp / c = 0.57, containing 0.2% titanium oxide) containing 2.2 mol% of sodium sulfo) isophthalic acid and ordinary polyester (ηsp / c = 0.07) containing no copolymer. 70, containing 0.2% of titanium oxide) were separately melted, compounded into a side-by-side mixture having a mixing ratio of 1: 1, spun and wound. Then stretch to 30d / 12f
A polyester conjugate yarn having a circular cross section (heat shrinkage of 20%) was obtained.

Next, in the same manner as in Examples 1 to 3, both yarns were aligned and a different shrinkage composite yarn (heat shrinkage difference: 8%) entangled and mixed by an interlace method was adjusted, and a knitting finish treatment was performed. . As shown in the test results in Table 5, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties. Example 10 A low shrinkage component yarn having a circumference ratio Lr of 1.
Multi-filament drawn yarn 75d / 72f of polyethylene terephthalate having a π-shaped cross section of 80 (heat shrinkage of 7
%), While 30 d / 12 as a high shrinkage component yarn
f Spun isophthalic acid copolymerized polyester multifilament drawn yarn having a round cross section (heat shrinkage 20%). Next, both yarns are aligned and interlaced and mixed by an interlace method under an overfeed of 1.5% and an air pressure of 2.0 kgf / cm ² , and then false twisting by a nip belt method (processing condition: twister angle 100 °) , The first heater at 150 ° C.) to obtain a composite yarn (heat shrinkage 12%, difference in heat shrinkage 9% between both yarns, crimp elongation 16%). Next, the composite yarn was subjected to the same knitting finishing treatment as in Examples 1 to 3.

As shown in Table 5, the test results showed that the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties.

[0049]

[Table 5]

[Example 11, Comparative Example 9] Using a 28 gauge single circular knitting machine, using the composite yarns of Comparative Example 1 and Example 2 to knit a back fawn structure, the same scouring was performed. A knitted fabric having a dyeing finish and a cover factor of 25000 was prepared. The test results are shown in Table 5 as shown in Table 5.
Had a small swelling and was inferior in windproof and heat insulating properties. On the other hand, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties. Example 12, Comparative Example 10 Using a 28 gauge double knitting machine, the composite yarns of Comparative Example 1 and Example 2 were used for the outer material, and the ordinary polyester multifilament false twisted yarn 75d / After knitting a smooth structure using 36f, a knitted fabric having a cover factor of 23000 was prepared by performing similar scouring and dyeing finishing.

The test results are shown in Table 6, as shown in Comparative Example 1.
No. 0 had small swelling, lacked lightness, and had poor texture. On the other hand, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties. [Example 13 and Comparative Example 11] Using a 28 gauge double circular knitting machine, the outer fabric is made of a knitted fabric using the composite yarns of Comparative Example 1 and Example 2, and the lining is made of ordinary polyester multifilament. A false twisted yarn 75d / 36f was used to inlay a knitted fabric on a surface material in a mesh structure, knitted, and then subjected to the same scouring and dyeing finishing as in Example 2 to prepare a two-layer knitted fabric having a cover factor of 21000.

As shown in the test results, as shown in Table 6, Comparative Example 11 had a small swelling and was inferior in windproof and heat insulating properties.
On the other hand, the present invention had a bulky soft touch feeling, was lightweight, had low air permeability, and was excellent in windproof and heat insulating properties.

[0053]

[Table 6]

Example 14 and Comparative Example 12 As a low-shrinkage component yarn, a multifilament drawn yarn 75d / 72f of polyethylene terephthalate having a round section with a circumference ratio Lr of 1.00 and a π-section with 1.80. Was spun to obtain a processed yarn (heat shrinkage 2%, crimp elongation 5%) in which false twisting was performed under the same conditions as in Examples 1 to 3. On the other hand, as the high shrinkage component yarn, the same polyester conjugate yarn as the component used in Example 9 was spun at 50d / 12f (heat shrinkage 20%).

Next, as in the case of Examples 1 to 3, both yarns were aligned, and a different shrinkage composite yarn (18% heat shrinkage difference) entangled and mixed by the interlacing method was adjusted. Using a gauge, the composite yarn is used as ground yarn to form a sheeting structure, and simultaneously a normal polyester drawn yarn 50d / 36f
Was knitted into a ground structure as a pile yarn to prepare a pile knitted fabric having a single-sided pile structure. After scouring and dyeing the knitted fabric, it is brushed on both sides with a napping machine (hair length about 8 mm).
The knitted fabric having a cover factor of 35000 was prepared by heat setting finishing the double-faced raised cloth subjected to the heat treatment.

As shown in Table 7, as shown in Table 7, Comparative Example 12 had a small swelling, a rough texture, and was inferior in windproof and heat insulating properties. The embodiment of the present invention has a soft texture,
It was lightweight, low in air permeability, and excellent in wind and heat insulation.

[0057]

[Table 7]

[0058]

The windproof knitted fabric of the present invention is a knitted fabric which can reduce the air permeability without impairing the knitted fabric characteristics, and has a swelling feeling, a light weight feeling and a soft touch feeling, and is excellent in windproof and heat insulating performance. It has high commercial value as a material for clothing in autumn and winter.

Claims (1)

[Claims] At least one layer of the knitted fabric has a heat shrinkage difference of 5%.
A knitted fabric composed of the hetero-shrinkage composite yarn having the above, wherein the low-shrinkage component yarn constituting the composite yarn has a circumference ratio Lr determined by the following equation of 1.2 or more. And a cover factor of a knitted fabric layer using the composite yarn is 15,000 to 6,000.
0, and the air permeability of the knitted fabric is 70 cc / cm ² / sec or less Lr = L ₁ / L ₂ (where L ₁ is a single yarn of a low shrinkage component yarn Circumference (cm)
And L ₂ is the single yarn cross-sectional area S ₁ (c
m ² ) represents the circumference (cm) of a circular cross section having the same area as
₂ = 2 × (π × S ₁ ) ^0.5 ).