JP2002302844A - Nylon spun woven fabric and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new fabric for simultaneously meeting lightweightness and thermal insulation, and to provide a method for producing such a fabric by a special and ideal hollow structure forming process comprising fabric formation followed by running out and removing the core component in the dyeing finishing step. SOLUTION: This nylon spun woven fabric has a basis weight of <=300 g/m<2> and a CLO value indicating thermal insulation of >=0.75. the other objective method for producing the above spun nylon woven fabric comprises making a fabric using conjugate spun yarns each composed of a polyamide as the sheath component and a polyester as the core component and then treating the fabric with a hot aqueous alkaline solution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a nylon spun woven fabric.

More specifically, the present invention relates to a woven fabric made of a polyamide and polyester core-sheath composite spun yarn having excellent properties such as heat retention and light weight.

[0003]

2. Description of the Related Art Synthetic fibers such as polyesters and polyamides are used in a wide range of fields in terms of excellent strength and easy care. Since these synthetic fibers, particularly filaments, have a cold feel and are unsuitable as winter outer materials, many methods for containing a large air space are employed.

[0004] For example, in the case of a filament, a method of increasing the heat retaining performance by applying false twisting or looping to the yarn to increase the bulk, or by forming the yarn into a multilayer structure in a woven structure has been adopted. In the post-processing, a method of fuzzing or raising the surface of the woven fabric is adopted, and a method of increasing the heat retention by adopting a hollow fiber structure as a yarn structure is adopted.

[0005] On the other hand, polyester fibers have been mainly used for spun fabrics up to now. However, due to the unique dryness and crispness of polyester, in recent years, new textures, namely soft and moist textures, have been developed. ,
Nylon spun woven fabrics have been reviewed in terms of physical properties such as high strength.

[0006] From the above background, nylon spun woven fabrics are widely used for sports clothing such as skiing, snowboarding, casual sports and the like, which are representative of winter sports, and for winter clothing.

However, since many of these are used in the cold season, the material itself becomes very thick, and as a result,
The disadvantage of becoming heavy is caused.

As one means for solving such a problem, it is conceivable that the yarn has a hollow structure. However, since ordinary polyamide fibers are produced by melt spinning, unlike polyester fibers, they are unlikely to have a high hollow structure, and since the modulus of the polymer itself is low, it passes through a spinning process, a weaving process, a dyeing process, and the like. At the time, there is a problem that the hollow structure is collapsed,
The measures were not effective.

[0009]

SUMMARY OF THE INVENTION Therefore, the present invention is excellent in comfort, excellent in heat retention and light weight, and has a soft and moist feeling which could not be obtained by the prior art as described above. An object of the present invention is to provide a nylon spun woven fabric having a unique texture and a method for producing the same.

[0010]

The nylon spun woven fabric of the present invention which achieves the above object has the following constitutions (1) and (2). (1) A nylon spun woven fabric having a basis weight of 300 g / m ² or less and a CLO value indicating heat insulation of 0.75 or more. (2) The nylon spun woven fabric according to claim 1, which is used for cold protection such as skiing and snowboarding.

The method for producing a nylon spun woven fabric of the present invention has the following constitutions (3) to (6). (3) A method for producing a nylon spun woven fabric, comprising forming a fabric using a composite spun yarn having a sheath component made of polyamide and a core component made of polyester, and then treating with a heated alkali aqueous solution. (4) The composite ratio (% by weight) of the core component / sheath component is 25/7
The method for producing a nylon spun woven fabric according to the above (3), which is in a range of 5 to 60/40. (5) The composite spun yarn in which the sheath component is made of polyamide and the core component is made of polyester, the composite ratio of the core component / sheath component (% by weight) is in the range of 25/75 to 60/40, and
The method for producing a nylon spun woven fabric according to the above (3), wherein the composite spun yarn is used for warp yarn and / or weft yarn and woven. (6) The nylon as described in (3) above, wherein a composite spun yarn obtained by copolymerizing a sulfonated aromatic dicarboxylic acid with the polyester of the core component in a range of 3.0 to 10.0 mol% by weight is used. Manufacturing method of spun fabric.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.

That is, according to the present invention, a fabric is formed using a spun yarn made of a core-sheath composite raw cotton of a polyester and a polyamide, and then subjected to a heating alkali treatment by a dyeing process to elute the polyester in the core to form a hollow. By forming the structure, the weight (weight per unit area) of the woven fabric per unit area is light, and the presence of an air layer with low thermal conductivity in the hollow part has realized a woven fabric that is lightweight and has excellent heat retention. Things.

In the nylon spun woven fabric of the present invention, it is important that the weight per unit area (basis weight) is 300 g / m ² or less, and that the CLO value indicating heat retention is 0.75 or more.

In general, factors that can be considered as factors when the garment has high heat retention include a low thermal conductivity of the material itself and a large thickness of the woven fabric.
For example, it may include many air layers. Therefore, in order to enhance the heat retention, the fabric should be designed so that the basis weight is increased. However, in that case, the lightness is completely impaired.

Since the textile material of the present invention is typically used for winterization in winter, the weight of various sub-materials in addition to the weight of the fabric is added, so that the weight of the final material is considerable. Therefore, the basis weight of the dough is 300 g / m
It is important that it is ² or less, more preferably 26
0 g / m ² or less.

[0017] The nylon spun woven fabric according to the present invention realizes such a lightweight feeling and lightness, and furthermore, a CL showing heat insulation.
The O value exhibits a high value of 0.75 or more.
The LO value of 0.75 or more satisfies the heat retention performance required for light exercise in winter.

As shown in Table 1, in the same kind of conventional woven fabric according to the conventional method, the CLO value is about 0.725 even though the basis weight is about 338 g / m ² . In the spun fabric of the present invention, the hollow ratio is 30%.
The product has a basis weight of 240 g / m ² , a CLO value of 0.772, and a product with a hollow ratio of 50% has a basis weight of 177 g / m ² .
It is possible to obtain a very high lightweight and heat retaining performance such as an LO value of 0.823.

According to various studies by the present inventors, the nylon spun woven fabric of the present invention has a basis weight of 200 to 240 g / m ² and a CLO value of 0.762 to
With a product of about 0.772 level and 50% hollowness, the basis weight is 15
0-177 g / m ² , CLO value 0.812-0.82
Lightweight and heat insulating performance of about three levels can be achieved.

In the present invention, the conjugate spun yarn refers to a spun yarn obtained by spinning a staple raw fiber conjugate fiber.

The composite spun yarn used in the present invention comprises:
The conjugate fiber is made of raw fiber of core-sheath conjugate fiber, the sheath component of which is a polyamide-based polymer, and the core component of which is a conjugated wool made of a polyester-based polymer.

In the present invention, as the polyamide constituting the sheath portion, polyhexamethylenadipamide (nylon 6
6) and polyamides composed of poly-ε-capramide (nylon 6) are suitable, but polyamides containing sebacic acid, isophthalic acid, para-xylene gamide or the like, or copolymerized polyamides thereof may also be used.

It is important that the polyester constituting the core is a readily soluble polymer because it is subjected to an alkali treatment in the dyeing process to be dissolved and removed.

As such a readily soluble polyester, for example, a sulfonated aromatic dicarboxylic acid-modified polyester, and a modified polyester in which a compound having a sulfone group is contained in a part of a chain or a terminal of the polyester can be used. Things. More specifically,
It is preferable to use a modified polyester obtained by copolymerizing polyethylene terephthalate or polybutylene terephthalate, or a copolymerized polyester containing these as a main component with a sulfonated aromatic dicarboxylic acid or a salt thereof.

A typical example of the sulfonated aromatic dicarboxylic acid is dimethyl 5-sodium sulfoisophthalate, which can be preferably used in the present invention. The copolymerization amount is preferably in the range of 3.0 to 10 mol% by weight based on terephthalic acid. If the copolymerization amount is too low, the desired effect may not be sufficiently obtained.On the other hand, if the copolymerization amount is too large, the crystal structure of the modified polyester may be disturbed, leading to a significant decrease in mechanical properties. Absent.

The composite ratio (% by weight) of the sheath portion and the core portion is important from the viewpoints of characteristics such as lightness and heat retention and feeling. The core-sheath composite ratio is preferably in the range of core: sheath = 25: 75 to 60:40. More preferably, core: sheath = 3
0:70 to 50:50.

The size of the core-sheath composite ratio does not matter much in the spinning and weaving processes, but since it is eluted by alkali treatment in the dyeing process to form a hollow structure in the fiber, the ratio of the core component is large. That is, although the lightness is improved as the hollow ratio increases, the hollow structure tends to easily deform when a physical force is applied in the state of the fabric. Generally, the deformed portion has a flat shape and is in a direction in which desired functions and characteristics cannot be exhibited. From this point, the ratio of the core component is preferably 60% or less. Conversely, if the ratio of the core component is small, the hollow structure is less likely to be deformed, but it is difficult to exhibit desired functions and characteristics. Regarding the preferred lower limit of the ratio of the core component, if the ratio of the core component is too small, it takes a long time to remove the decomposed product by penetrating the inside of the sheath during the step of eluting and removing the core component, From this point, the core component ratio is preferably 25% or more.

The fiber cross-sectional shape of the conjugate fiber (raw cotton) is not particularly limited, but a concentric core-sheath composite form is typical and preferable in production, but the core-sheath is relatively eccentric. Alternatively, the shape may be a polygonal shape such as a triangular shape, a quadrangular shape, or an elliptical shape. Further, the core may be a single core instead of a single core.

In the spinning process, the above-mentioned raw cotton is 100%
Is more effective in fully exhibiting the properties of the present invention, such as heat retention and lightness, but the nylon spun woven fabric according to the present invention uses 100% of the raw cotton. It is not limited to the above, but may be a blended product with other raw cotton or a spin-twisted product with a filament yarn (a so-called long and short composite spun yarn), which is a feature that cannot be obtained by the conventional technology. Nylon spun textile products can be created.

At this time, in order to perform elution by alkali treatment in the dyeing process, it is practical to consider a combination with a material resistant to alkali. The production conditions of the spun yarn in the spinning process are basically not particularly different from those in the case of using ordinary polyester or polyamide fibers.

From the viewpoint of fabric design, the spun yarn may be used for warp and weft, or may be used for warp only or weft only.

That is, although a woven fabric having a characteristic can be obtained by interweaving and arrangement with other materials, it is practical to consider a combination with a material which is resistant to alkalis as described above. .

The weaving step may be performed in the same manner as in a normal spun fabric. The loom that can be used is not particularly limited.
It can fully respond to innovative looms such as air jet looms and rapier looms.

In the alkali treatment for eluting and removing the polyester component such as the modified polyester in the core, a caustic alkali such as caustic soda and caustic potash may be used as a chemical. The processing conditions vary depending on the core-sheath composite ratio and the mixing ratio of the raw cotton constituting the fabric.
Generally, the conditions of the caustic alkali concentration of 10 to 80 g / liter and the treatment temperature of 80 to 120 ° C. may be used.
Dyeing may be carried out using dyes and dyeing conditions that are generally used for dyeing polyamide.

The nylon spun woven fabric obtained according to the present invention is suitably used for winter sports and casual uses, etc., because of its light weight and heat retaining properties, and can sufficiently exhibit its functional characteristics.

That is, conventionally, the woven fabric used for the application is inevitably heavy because it is formed into a woven fabric with a high density and a large count. Generally, the basis weight of about 400 g / m ² is generally used. However, the feeling of weight significantly impaired wearing comfort. According to the present invention, when the composite ratio of the polyester component is 40%, for example, the weight reduction of about 40% can be realized.

Further, assuming a scene in which these are used, a heat retaining property is also indispensable, and it is possible to provide a fabric having heat retaining properties in addition to lightweight properties.

[0038]

The present invention will be described below in detail with reference to examples. The evaluation method in the example is shown below. (1) Basis weight: A 25 cm × 25 cm fabric test piece was collected, dried sufficiently until the equilibrium level ratio was equal to or less than 20 ° C.
After standing in a room of 65% RH for 24 hours to achieve level equilibrium, the weight of the test piece is measured. The weight of the obtained test piece was converted per 1 m ² , and represented by an average value of two cloth pieces. (2) Heat retention (CLO value): Two 50 cm × 50 cm test pieces are collected. Using an ASTM heat retention tester, the test piece is attached to a hot plate at a hot plate temperature of 40 ° C. and left for 60 minutes. Read the energization time (seconds) of the integrating wattmeter after leaving the measurement time, and the outside air temperature (° C) of the measuring instrument.

The state in which the test piece is not attached is read. From the energizing time (sec) when the test piece was not attached, the energizing time (sec) when the test piece was attached, and the outside air temperature determined above, the heat retention rate (%) and the CLO value were obtained by the following equation, and the average of the two sheets was obtained. Expressed by value.

Heat retention rate (%) = (ab) / a × 100 CLO value = (6.54 × (40−t)) / b / 0.18 where a: when no test piece is attached Energizing time (s
ec / hr) b: energization time when a test piece is attached (sec / h)
r) t: outside air temperature (° C.) indicated by the measuring instrument Example 1 A polyester obtained by copolymerizing 8.0 mol% of dimethyl 5-sodium sulfoisophthalate as a core component, and nylon 66 as a sheath component was used. After spinning at a spinning speed of 1300 m / min with a sheath composite ratio (weight%) of core: sheath = 30: 70, ordinary drawing was performed at 3.0 times, crimping was applied, and then cut to obtain a single fiber fineness. 1.7 dtex, fiber length 3
A composite fiber raw cotton consisting of a composite fiber of 8 mm was obtained.

Subsequently, a roving of 0.76 count is produced by a usual spinning method using 100% of the composite fiber raw cotton, a spinning draft of about 21 times, a twist number of 16.1 t / inch (inch), a cotton A composite spun yarn having a count of 16 s was produced.

The spun yarn was used for warp and weft, and the woven fabric was woven in an air jet loom with a woven density of 101 / inch × width / 82 / inch and a woven structure of a slanted weave.

In the dyeing process, the thus obtained greige fabric is refined and relaxed, and then adjusted to a concentration of 50 g / liter of an aqueous solution of caustic soda at a processing temperature of 110 ° C. and a processing time of 60 g / l.
The polyester component of the core was eluted and removed using a jet dyeing machine.

Subsequently, ordinary nylon dyeing at 100 ° C.
The dyeing was performed in 45 minutes, and the density after finishing was 115 lines / inch × 94 lines / inch. Example 2 Example 1 was repeated except that a polyester obtained by copolymerizing 8.0% by mole of dimethyl 5-sodium sulfoisophthalate as a core component and nylon 66 was used as a sheath component in a core-sheath composite ratio (weight%) of 50:50. In the same manner as in the above, a fabric was prepared in the spinning, weaving, dyeing steps and conditions. Comparative Example 100% of nylon 66, that is, not a core-sheath composite,
After spinning at a spinning speed of 1300 m / min, normal stretching is performed at 3.0 times, cut after crimping is applied, and the single yarn fineness is 1.7d.
A raw cotton having te × fiber length of 38 mm was obtained. Spinning, weaving process,
The conditions were set in the same manner as in Example 1 to obtain a greige.

In the dyeing process, the greige machine was refined and relaxed, and then processed under ordinary nylon dyeing conditions. The density after finishing was 115 lines / inch × 95 lines / inch.

Table 1 shows the results of evaluation of the above three points of spun fabrics.

[0047]

[Table 1]

[0048]

According to the present invention, it is possible to provide a novel spun woven fabric which has not only the prior art but also has a light weight and a heat retaining property and also has a supple texture unique to spun nylon.

The spun fabric according to the present invention has a light weight
Because of its features of heat retention, it is suitably used for winter sports and casual uses. Of course, other applications (outdoor clothing and supplies, mountain clothing,
Supplies, etc.).

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // D06M 101: 34 D06M 3/32 F term (Reference) 4L031 AA18 AA20 AB10 AB32 BA11 CA01 4L036 MA05 MA06 MA15 MA19 MA35 MA37 PA31 RA04 UA25 4L041 AA07 BA02 BA05 BA14 CA11 CA25 DD01 DD11 4L048 AA21 AA24 AA28 AA39 AA47 AB01 CA10 DA03 EA01

Claims (6)

[Claims] 1. A nylon spun woven fabric having a basis weight of 300 g / m ² or less and a CLO value indicating heat retention of 0.75 or more. 2. The nylon spun woven fabric according to claim 1, which is used for cold protection such as skiing and snowboarding. 3. A method for producing a nylon spun woven fabric, comprising forming a fabric using a composite spun yarn comprising a polyamide as a sheath component and a polyester as a core component, and treating with a heated alkali aqueous solution. 4. The composite ratio (wt%) of the core component / sheath component is 2
The method for producing a nylon spun woven fabric according to claim 3, characterized in that it is in the range of 5/75 to 60/40. 5. A composite spun yarn comprising a polyamide as a sheath component and a polyester as a core component, wherein the composite ratio (% by weight) of the core component / sheath component is in the range of 25/75 to 60/40,
4. The method for producing a nylon spun woven fabric according to claim 3, wherein the composite spun yarn is woven using a warp yarn and / or a weft yarn. 6. The composite spun yarn according to claim 3, wherein a sulfonated aromatic dicarboxylic acid is copolymerized with the polyester of the core component in a range of 3.0 to 10.0 mol% by weight. Manufacturing method of nylon spun fabric.