JP2002201548A - Uphostery fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upholstery fabric which has durable elasticity free from loosening, rich in dimensional stability, has wear resistance and very soft touch feeling, thus excellent in human body-holding property due to high elongation recovery and stress-retention. SOLUTION: This upholstery fabric has at least ground yarn comprising polytrimethylene terephthalate fiber being >=70% in elastic recovery both longitudinally and transversely in 10% elongation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric used as a skin material for chairs, sofas, beds, hammocks and the like. In more detail, it has a durable resilience, no slack, rich dimensional stability, fits body movements, and has good follow-up properties because of its soft texture, excellent stretch recovery and stress retention. The present invention relates to a fabric for skin material which is good and has excellent abrasion resistance.

[0002]

2. Description of the Related Art At present, fabrics using bulky yarns of polyamide fibers or polyester fibers are widely used for skin materials such as chairs, sofas and beds. Since the skin material is a part that directly touches the body, it needs to have a soft feel as a woven fabric and not to impair the cushioning properties required for chairs, sofas, beds, and the like. In order to follow the movement of the cushion material, it is necessary that the skin material also has appropriate softness, extensibility, resilience, and flexibility and has excellent dimensional retention. For this reason, as a fabric for the skin material, a fabric is used which is made of a yarn obtained by covering a polyurethane fiber with a raw yarn of a polyamide fiber or a polyester fiber, a yarn obtained by covering with a bulky processed yarn, or a twisted yarn, and imparting appropriate elongation and good return. ing.

However, the skin material of a chair or the like, unlike ordinary clothing, has a large total fineness of yarn used and a large basis weight. The contribution to the good growth and good return is small. As a result, even with polyurethane fibers, the softness and elongation / recovery are not enough, so the texture is moderate to the human body and holdability, that is, it fits the body and follows the movement of the body easily. It is difficult to obtain a woven fabric with high performance, and it is not deformed with good responsiveness to the movement of the cushioning material and does not bend even after repeated use, and it is difficult to obtain a woven fabric with excellent dimensional retention. The development of was strongly desired.

[0004] In many chairs and the like, urethane foam or the like having a high elasticity is usually used as a cushion material, and a skin material made of a woven or knitted material is stretched on the cushion material. However, in recent years, from the viewpoint of recycling for protecting the global environment, there has been an increasing demand for deurethane for chairs for homes, offices, vehicles, and the like. For this reason, without the use of urethane foam cushioning material, the sheet is composed of only a skin material that has high resilience and cushioning properties, has good recoverability when deformed, and has durability against deflection and settling. The desire to do so is also increasing.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to an epidermis having a soft texture, a stretch property, no sagging, an excellent hold property for the human body, an excellent stretch recovery property and an excellent stress retention property. It is intended to provide a woven fabric for materials.

[0006]

Means for Solving the Problems As a result of intensive studies on the above-mentioned problems, the present inventors have found that at least the warp or the weft is a woven fabric composed of polytrimethylene terephthalate fiber, and the warp and weft directions of the woven fabric are constant. The inventors have found that the above problem can be solved by setting the elastic recovery rate at the time of extension to 70% or more, and have accomplished the present invention. That is, the present invention provides (1) a woven fabric in which at least the warp or weft is composed of polytrimethylene terephthalate fiber, and (2)
A woven fabric for a skin material, wherein the woven fabric has an elastic recovery rate of 70% or more at 10% elongation in the warp and weft directions. The fabric for the skin material of the present invention is a conventional skin material that covers the skin of a chair, a sofa, a bed, or the like with a cushion material, and further, without using a cushion material.
It is a woven fabric for a skin material having cushioning properties by using only this woven fabric.

[0007] In the present invention, polytrimethylene terephthalate fiber is a general term for fibers made of polytrimethylene terephthalate. Here, polytrimethylene terephthalate will be described. Polytrimethylene terephthalate is a polyester having trimethylene terephthalate units as main repeating units, and contains trimethylene terephthalate units in an amount of about 50 mol% or more, preferably 70 mol% or more, further 80 mol% or more, and more preferably 90 mol% or more. % Or more. Therefore, the total amount of the other acid component and / or glycol component as the third component is about 50 mol% or less, preferably 30 mol% or less,
Furthermore, 20 mol% or less, more preferably 10 mol%
The polytrimethylene terephthalate contained in the following range is included.

[0008] Polytrimethylene terephthalate is synthesized by combining terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this synthesis process, one or more appropriate third components may be added to form a copolymerized polyester, or
Polyesters other than polytrimethylene terephthalate such as polyethylene terephthalate and polybutylene terephthalate, and nylon and polytrimethylene terephthalate may be separately synthesized and then blended.

As the third component to be added, aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexane dicarboxylic acid, etc.), aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.) ), Aliphatic glycols (ethylene glycol, 1,2
-Propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexane dimethanol, etc.), aliphatic glycols containing aromatics (1,4-bis (β-hydroxyethoxy) benzene, etc.), polyether glycols (polyethylene glycol) , Polypropylene glycol and the like), aliphatic oxycarboxylic acids (such as ω-oxycaproic acid), and aromatic oxycarboxylic acids (such as p-oxybenzoic acid). Compounds having one or more ester-forming functional groups (such as benzoic acid or glycerin) can also be used as long as the polymer is substantially linear.

Further, matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, lubricating agents such as aerosil, and antioxidants such as hindered phenol derivatives. Agents, flame retardants, antistatic agents, pigments, optical brighteners, infrared absorbers, defoamers, and the like. The polytrimethylene terephthalate fibers include so-called multifilament yarns and monofilament yarns. The fibers may be long fibers or short fibers, and may be uniform or thick in the length direction. Round, triangular, L
Type, T type, Y type, W type, Yaba type, flat (flatness 1.3 ~
About 4 types, such as W type, I type, Boomerang type, corrugated type, skewered dumpling type, cocoon type, cuboid type, etc.), polygon type such as dog bone type, multi-leaf type, hollow type, etc. It may be indefinite.

Regarding a method for producing a polytrimethylene terephthalate fiber multifilament yarn (hereinafter, referred to as a multifilament yarn), after obtaining an undrawn yarn at a winding speed of about 1500 m / min, it is about 2-3.5 times. Winding at a spinning speed of 3000 m / min or more to obtain a pre-oriented undrawn yarn, followed by drawing, a spin draw method directly connecting the spinning-drawing process, and a winding speed of 5000 m / min or more. Any method such as a high-speed spinning method (spin take-up method) or a water cooling method of drawing once after spinning, followed by cooling in a water bath may be employed.

The method for producing a polytrimethylene terephthalate fiber monofilament yarn (hereinafter, referred to as a monofilament yarn) may include, for example, the following steps. The dried polytrimethylene terephthalate pellets are supplied to an extruder, melted, fed to a spin head, spun out from a spinneret, and cooled to a predetermined fineness while cooling in a cold water bath as filaments. After forming into a drawn monofilament, it is first drawn in a hot water bath at a predetermined temperature, and then heat-treated in a steam bath at a predetermined temperature for a fixed length or relaxation, and wound up by a winder. In this step, a heat treatment step may be further provided to adjust the boiling water shrinkage of the monofilament yarn.

The intrinsic viscosity of the polytrimethylene terephthalate fiber is preferably 0.8 to 1.3 dl / g.
More preferably, it is 0.8 to 1.1 dl / g. 0.
If it is less than 8 dl / g, not only the toughness of the polytrimethylene terephthalate fiber is low, but also when it is used in a woven fabric, an appropriate resilience cannot be obtained, and settling may occur. If it exceeds 1.3 dl / g, the production of the polytrimethylene terephthalate fiber may be difficult, and the warp of the monofilament yarn may become large, making the processing of the fabric difficult.

The physical properties of the polytrimethylene terephthalate fiber used in the present invention are as follows: strength is 2.0 cN / dt.
ex or more, especially in the case of a multifilament yarn, it is preferably 2.6 cN / dtex or more, more preferably in the range of 2.6 to 5.0 cN / dtex. This is a preferable characteristic for preventing a tear accident when used as a skin material. The tensile elongation of polytrimethylene terephthalate fiber is 35%
It is more preferably at least, and more preferably in the range of 35 to 60%. If the tensile elongation is less than 35%, the frequency of yarn breakage during false twisting or fluid jetting may increase.

The initial tensile resistance is 26.5 cN / dtex.
Is preferably 17.6 to 26.5 cN /
More preferably, it is dtex. 26.5 cN / d
If the tex exceeds tex, the fabric for the skin becomes unsatisfactory in softness, and the soft fabric for the skin material, which is the object of the present invention, cannot be obtained. In addition, the polytrimethylene terephthalate fiber used in the present invention needs to have an elongation recovery rate at the time of 10% elongation of preferably 70% or more, more preferably 80 to 100%. If the elongation recovery rate is less than 70%, the rate of recovery from load elongation when used as a skin material will be poor, resulting in loosening and sagging of the woven fabric and insufficient dimensional stability in some cases.

Among the polytrimethylene terephthalate fibers used in the present invention, the single filament fineness of the multifilament yarn is preferably 0.1 to 20 dtex. When the single yarn fineness is smaller than 0.1 dtex, the abrasion resistance as a woven fabric is reduced, and when the single yarn fineness is larger than 20 dtex, the texture may be hard. The total fineness of the yarn of the polytrimethylene terephthalate fiber used in the present invention (both multifilament yarn and monofilament yarn) is from 56 to 1 from the viewpoint of arbitrarily setting the design strength and thickness of the woven fabric.
It is preferably 670 dtex. In the case of a monofilament yarn, the fineness of a single yarn is preferably about 56 to 1670 dtex in terms of characteristics as a woven fabric.

The form of the yarn is not particularly limited, and is a spun yarn such as a ring spun yarn or an open-end spun yarn, or a multifilament raw yarn having a single yarn denier of about 0.1 to 5 deniers (including an ultrafine yarn). , Sweet twisted to strong twisted yarns, false twisted yarns (including POY drawn false twisted yarns), fluid (air) jetted yarns, push-in yarns, knit denitted yarns, molding yarns, and the like. Here, in the case of the molding yarn, both the core and the sheath may be made of polytrimethylene terephthalate fiber, or the sheath may be made of another fiber. Also, in terms of being able to express smooth and beautiful surface properties, among the loop fluffs formed in the surface layer portion, the number of fluff lengths of 0.6 mm or more is 30 to 1
It is preferable to use a fluid jet processed yarn composed of a multifilament yarn having a speed of 00 cores / m. As a method of forming such a fluid jet processing yarn, there are 1 feed and 2 feeds. In the case of 2 feeds, for example, by providing a feed difference, a fluid injection processing yarn having a sheath-core structure composed of a sheath yarn and a core yarn is obtained. A fluid jet processed yarn by any method may be used.

The processing speed during the fluid jet processing may be arbitrarily set, but is preferably 50 to 500 m / min, and more preferably 100 to 500 m / min.
300 m / min and the fluid turbulent pressure is 3.0-1
It is in the range of 0.0 kg / cm ² . 2. Fluid disturbance pressure
If it is less than 0 kg / cm ² , entanglement between filaments may be weakened, and if it is more than 10.0 kg / cm ² , fluffing or yarn breakage may occur, which is not preferable. By applying an appropriate amount of water to the supply yarn at the time of this fluid jet processing, the entanglement between the multifilaments can be made uniform and strong,
Furthermore, a uniform entangled yarn can be obtained. The feed amount of the yarn at the time of fluid jetting may be set arbitrarily, but is + 5% to + 30% in the case of simultaneous feed, and the overfeed rate is + 5% in case of providing a feed difference.
By setting + 20%, + 10% to + 40% for the sheath yarn, and +5 to + 30% for the feed difference, it is possible to obtain a fluid jet processed yarn optimal for the present invention.

Among the polytrimethylene terephthalate fibers of the present invention, from the viewpoint of elongation recovery characteristics and stress retention when a woven fabric is formed, a latent crimp-expressing polyester having at least one component being polytrimethylene terephthalate is preferred. Fiber. Latent crimp-expressing polyester fiber is a fiber composed of at least two kinds of polyester components (specifically, bonded to a side-by-side type or an eccentric sheath-core type), and expresses crimp by heat treatment. Is what you do. The composite ratio of the two types of polyester components (generally, most are in the range of 70/30 to 30/70), and the shape of the joint surface (there is a straight or curved shape) are not particularly limited. The fineness is 20-300 dtex,
The fineness of single yarn is preferably 0.5 to 20 dtex, but is not limited thereto.

The latent crimp developing polyester fiber used in the present invention is a conjugate fiber in which two kinds of polyester polymers are joined in a side-by-side type or an eccentric sheath-core type. In the case of the side-by-side type, the melt viscosity ratio of the two polyester polymers is preferably 1.00 to 2.00, and in the case of the eccentric core-sheath type, the alkali weight reduction ratio between the sheath polymer and the core polymer is 3 times or more. Preferably, the sheath polymer is fast. Specific combinations of polymers may include polytrimethylene terephthalates, polytrimethylene terephthalate and other polyethylene terephthalates, polybutylene terephthalates, and copolymers thereof.
Also, of course, the aforementioned matting agents, flame retardants, antistatic agents,
An additive such as a pigment may be contained.

As described above, the latent crimp developing polyester fiber used in the present invention is particularly preferably one in which at least one of the polyester components constituting the fiber is polytrimethylene terephthalate. A combination of polytrimethylene terephthalate and copolymerized polytrimethylene terephthalate and a combination of two types of polytrimethylene terephthalate having different intrinsic viscosities are preferred.

In particular, in the case of the fiber obtained by the composite spinning, it is preferable that the polytrimethylene terephthalate component is disposed inside the developing crimp. Further, in the present invention, when the latent crimp-expressing polyester fiber,
The initial tensile resistance is preferably from 10 to 30 cN / dtex, and more preferably from 20 to 27 cN / dtex. Further, the stretching / elongation ratio of the actual crimp is preferably 10 to 100%, more preferably 10 to 60%. Further, the stretching elastic modulus of the actual crimp is preferably 80 to 100%, particularly 85 to 100%, and more preferably 85.
When the content is up to 97%, a skin material having a soft feel and excellent stretch recovery characteristics and stress retention can be obtained.

The heat shrinkage stress of the used polytrimethylene terephthalate fiber at 100 ° C. is 0.1 to 0.5 cN.
/ Dtex, especially 0.1 to 0.4
cN / dtex is more preferably 0.1 to 0.3 cN / dtex. The heat shrinkage stress at 100 ° C. is
This is an important requirement for developing crimps in the scouring and dyeing processes of textiles. That is, in order to overcome the restraining force of the woven fabric and develop the crimp, the heat shrinkage stress at 100 ° C. is preferably 0.1 cN / dtex or more.
The stretch ratio after hot water treatment is preferably 100 to 250%, more preferably 150 to 250%, and particularly preferably 180 to 250%. The elastic modulus after hot water treatment is preferably from 90 to 100%, more preferably from 95 to 100%.

As the latently crimp-expressing polyester fiber having such properties, for example, two fibers having different intrinsic viscosities are used.
Composite fibers in which various types of polytrimethylene terephthalate are composited with each other in a side-by-side type. The difference in intrinsic viscosity between the two types of polytrimethylene terephthalate is preferably 0.05 to 0.4 (dl / g),
The average intrinsic viscosity of this composite fiber is 0.7 to 1.2 (dl)
/ G) is good.

The intrinsic viscosity value in the present invention refers to the viscosity of the spun yarn, not the polymer used. The reason is that, as a disadvantage peculiar to polytrimethylene terephthalate, thermal decomposition tends to occur more easily than polyethylene terephthalate and the like. In the present invention, it is difficult to maintain a large difference in intrinsic viscosity between filaments, and in the present invention, the above-described method for producing a multifilament yarn can be employed for spinning of a latently crimp-expressing polyester fiber.

The polytrimethylene terephthalate fiber usually has a content of 50% by weight within a range not to impair the object of the present invention.
Other fibers such as natural fibers, synthetic fibers, etc. within a range of less than
Natural fibers such as cotton, wool, hemp, silk, etc., cupra, viscose, polynosic, purified cellulose, acetate, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and various artificial fibers such as nylon and acrylic; Furthermore, blending (co-yarn, silospan, silofil, hollow spindle, etc.) of these copolymer types and composite fibers (side-by-side type, eccentric sheath-core type, etc.) using the same or different polymers, covering (single, double), For example, blending or twisting with a low shrinkage yarn having a boiling water shrinkage of about 3 to 10% or a high shrinkage yarn having a boiling water shrinkage of about 15 to 30%,
False twisting (combination in elongation difference false twisting, POY stretching false twisting, etc.), and two-feed air jet processing may be used for mixing.

A feature of the present invention is that the elastic recovery at the time of 10% elongation in the warp and weft directions of the woven fabric is 70% or more. In the case of a skin material that can be stretched by receiving a continuous load over a long period of time, if the elastic recovery rate is less than 70%, the elasticity of the skin material is poor after the stretch is released. Disappears, the fabric sags, and distortion remains. When the elastic recovery is less than 70%,
The holdability (fitness and followability) with respect to the human body and the movement of the human body is also poor, resulting in poor sitting comfort and sleeping comfort. When the holdability is reduced, the load on the body is increased, and there is a possibility that long-term use may not be possible. Further, when the stress retention after 15 minutes under 10% elongation is less than 70%, the fatigue phenomenon due to stress relaxation of the woven fabric stretched by sitting increases, and as a result, strain tends to remain, which is preferable. Absent. In addition, the hold property on the human body is also reduced. As described above, a woven fabric using polytrimethylene terephthalate fiber for at least the warp or the weft has a 10%
Only when the elastic recovery rate at the time of elongation satisfies both conditions of 70% or more, the fabric for the skin is soft, has excellent holdability to the human body, has no looseness or sag, and has excellent dimensional stability. can get.

Further, the fabric of the present invention is subjected to a force at least equivalent to the weight of a person. Therefore, it is preferable to have a certain degree of tensile strength as a woven fabric. The tensile strength is at least 98 N / in both the longitudinal direction and the weft direction, although it depends on the area where it is used by extending it on a cushioning material, using it alone without using a cushioning material, or depending on the part used.
The width is preferably 2.5 cm or more, more preferably 196 to
1960 N / 2.5 cm width. 98N / 2.5cm
If the width is less than the width, there is a risk of causing a tear accident when used as a skin material.

The tensile elongation at break varies depending on the use condition as well as the tensile strength, but is preferably at least 10% or more, more preferably 30 to 8 in both the longitudinal direction and the weft direction.
0%. When the tensile elongation at break is less than 10%, there is a possibility that a breakage accident may be caused by a stress on a human body or a movement of the human body when used by a human. On the other hand, if it exceeds 80%, the holdability (fitness and followability) may decrease due to the elongation as the skin material, and it may not withstand long-time comfortable use.

Further, when a force is applied by leaning on a chair or a bed using the woven fabric of the present invention, the woven fabric can be easily deformed while being fitted to the body with a constant length and weft. Are preferably similar. 98
If the elongation ratio in the weft direction to the warp direction at the time of N stress (per 2.5 cm width) is 0.5 to 1.5, the elongation in the warp direction and the weft direction is almost similar, so that the woven fabric Is stretched without difficulty, and distortion and the like hardly remain. Exceeding this range is not preferable, especially when used for a long period of time, since bending, settling, and distortion often remain.

The fabric structure is not particularly limited. As well as a plain weave structure, a twill weave structure, a pattern structure, a multi-woven fabric having three axes, four axes, or the like, or a kami weave can be used. Concerning density standards of textiles, meet the specifications (width, thickness, design strength, etc.) of skin materials (can also be used as cushion materials) for chairs, beds, sofas, etc.
It is preferable to carry out an optimal design in consideration of the strength and fineness of the polytrimethylene terephthalate fiber to be used, and also the woven structure.

In the dyeing and finishing step of the fabric for the skin in the present invention, the same steps as those of the conventional skin material can be used. The woven fabric may be formed by using a yarn dyed by a package dyeing machine or the like, such as a cheese dyed yarn, or may be formed by a post-dyed yarn. The dyeing method is not particularly limited as long as it does not have the excellent elongation-recovery property, looseness, or sag which is a feature of the present invention. Depending on the form of the polytrimethylene terephthalate fiber thread or the woven fabric used, a step of imparting a greige set can be taken in the case of the post-dyeing method.

In order to further improve the abrasion resistance of the woven fabric, the fabric may be impregnated with a water-soluble polyurethane resin having excellent abrasion resistance and a flexible resin film. Further, in order to improve the surface smoothness of the woven fabric and the slipperiness between the fibers to improve the stress dispersibility, the elastic recovery and the durability, a silicone-based smoothing agent may be blended into the resin liquid.

It is also possible to change the expression on the surface of the woven fabric by performing a raising process. The brushing method may be a commonly used method, and may be either brushed or brushed. The skin material of the present invention can be used as a skin material for cushion materials such as chairs, beds and sofas. In addition, it may be used as a skin material having a cushioning property without using a cushioning material such as urethane foam by utilizing the excellent elastic recovery property.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples. The evaluation in Examples and Comparative Examples was measured by the following method. (1) Intrinsic viscosity Intrinsic viscosity [η] (dl / g) is a value obtained based on the definition of the following equation. [Η] = Lim (ηr-1) / C C → 0 In the definition, ηr is a solution of a polytrimethylene terephthalate yarn or a diluted solution of a polyethylene terephthalate yarn dissolved in an o-chlorophenol solvent having a purity of 98% or more at 35 ° C. It is a value obtained by dividing the viscosity by the viscosity of the solvent measured at the same temperature, and is defined as a relative viscosity. C is g
/ 100 ml of polymer concentration.

In the case of composite multifilaments using polymers having different intrinsic viscosities, it is difficult to measure the respective intrinsic viscosities of the multifilaments.
Each type of polymer was spun alone, and the intrinsic viscosity measured using the obtained yarn was defined as the intrinsic viscosity of the composite multifilament.

(2) Initial tensile resistance: JIS L10
13 Test method for chemical fiber filament yarn 0.882 per unit fineness of sample according to the test method for initial tensile resistance
A tensile test was performed by applying an initial load of mN / dtex, and the initial tensile resistance (cN / dte) was obtained from the obtained load-elongation curve.
x) was calculated, and an average value of 10 times was obtained.

(3) Stretch elongation rate, stretch elastic modulus: JIS
L1090 Synthetic fiber filament bulky processed yarn test method Elasticity test method Measurement was performed in accordance with Method A, and the elastic elongation (%) and the elastic modulus (%) were calculated, and the average value of 10 measurements was obtained. The stretch ratio and the stretch modulus of the actual crimp were determined by measuring the sample unwound from the winding package at a temperature of 20 ±
The measurement was performed after standing for 24 hours in an environment of 2 ° C. and a humidity of 65 ± 2%. The stretch ratio after stretching with hot water and the stretch modulus were measured using a sample which was immersed in hot water at 98 ° C. for 30 minutes with no load, and then naturally dried for 24 hours with no load.

(4) Thermal shrinkage stress: Using a thermal stress measuring device (trade name KE-2 manufactured by Kanebo Engineering Co., Ltd.)
A sample is cut to a length of 20 cm, a ring is formed by connecting both ends, and the ring is loaded on the measuring device. The initial load is 0.044 cN / dte.
x, the heat shrinkage stress was measured under the conditions of a heating rate of 100 ° C./min, and 1 was obtained from the change curve of the heat shrinkage stress with respect to the obtained temperature.
The heat shrinkage stress at 00 ° C. was read.

(5) Evaluation of elastic recovery rate at 10% elongation of woven fabric Using a tensile tester manufactured by Shimadzu Corporation, grip width 2.5 cm, grip interval 10 cm, tensile speed 10 cm /
After elongating to 10% elongation in 10 minutes, the sample is shrunk at the same rate and a stress-strain curve is drawn. The elongation when the stress becomes 0 during the shrinkage is defined as residual elongation A. The elastic recovery was determined according to the following equation. Elastic recovery at 10% elongation = [(10−A) / 10] ×
100%

(6) Evaluation of stress retention at 10% elongation Using a tensile tester manufactured by Shimadzu Corporation, grip width 2.5 cm, grip interval 10 cm, tensile speed 10 cm /
In 10 minutes, elongate to 10% and leave for 15 minutes in this state. The stress value (A) at 10% elongation and the stress value (B) after 15 minutes are read. The stress retention was determined by the following equation. Stress retention = [B / A] × 100 (%)

(7) Evaluation of texture, resilience, set and holdability The fabric was stretched on a steel pipe frame to make a trial summer bed. The texture, cushioning,
The holdability was sensory evaluated by 10 subjects. Also 2
After 0 minutes, the degree of sagging of the fabric was visually judged.

(8) Evaluation of Recovery from Constant Deformation The woven fabric is sandwiched between two steel plates having a circular hole having a diameter of 15 cm and fixed so as not to shift. An elliptical spherical strain having a height of 38 mm is given by using a hemispherical weight having a diameter of 10 cm, and left for 10 minutes. At this time, the stress for giving a constant deformation, the strain area A after demining after 10 minutes, and the strain area B after 15 hours are read. The recoverability from distortion is determined from the following. Strain recovery = (AB) / A × 100 (%)

(9) Evaluation of Biaxial Tensile Tester Using a biaxial tensile tester manufactured by Shimadzu (Osaka AIST), the operation of elongating 10% vertically and horizontally at the same time and returning was repeated 10 times. . From the hysteresis loss curves (Y axis: stress, X axis: elongation) of the warp and weft obtained at this time, the stress at the time of 10% elongation, the first time recovery rate with time, and the time-dependent recovery rate were determined. The formulas for obtaining the test conditions and the recovery rate are as follows. Sample shape: 28 × 28 cm ² gripping area 20 × 20
cm ² Tensile speed: 100 mm / min Recovery rate = (10−X1) / 10 × 100% X1: The elongation (%) at which the stress becomes 0 when returning from the 10% elongation.

[0045]

Example 1 A polytrimethylene terephthalate having ηsp / c = 0.8 was spun at a temperature of 265 ° C. and a spinning speed of 1200 m.
/ Min to obtain an undrawn yarn, then hot roll temperature 60 ° C,
It was stretched at a hot plate temperature of 140 ° C., a draw ratio of 3 and a drawing speed of 800 m / min to obtain a drawn yarn of 167 dtex / 48f. The strong elongation, elastic modulus, and elastic recovery at 10% elongation of the drawn yarn were 4.0 cN / dtex and 46 cN, respectively.
%, 26.5 cN / dtex and 98%. One 167 dtex / 48f polytrimethylene terephthalate fiber yarn obtained by the above method was used as a core yarn at a feed rate of 10%, and three 167 dtex / 48f polyethylene terephthalate fiber yarns were used as a sheath yarn at a feed rate of 15%. This was processed to obtain a fluid jet textured yarn.

<Fluid Injection Processing Conditions> Processing Speed 400 m / min Fluid Disturbing Pressure 7.0 kg / cm ² Nozzle Hema T-321 Feed Rate Core Yarn: 10% (One 167 dtex / 48f Yarn) Sheath Yarn: 15% ( 167dtex / 48f thread 3)

The obtained fluid jet yarn is soft-wound.
And a winding density of 0.35 g / cm ^TwoAnd roll 1kg,
Set this cheese on a package dyeing machine manufactured by Hisaka Works
And after scouring at a flow rate of 40 liters / min,
Performs dyeing dyeing to obtain cheese dyed fluid jetted yarn
Was. Use the obtained cheese dyeing fluid jet processed yarn for weft
61, longitude / 2.54cm, latitude 44 / 2.54cm
After that, two wefts were aligned to obtain a flat fabric. This fabric
Has a breaking strength of 627 N for a width of 2.5 cm and a weft of 90
2N and breaking elongation were 70% and 89%, respectively. Obtained
The woven fabric has excellent elastic recovery and stress as shown in Table 1.
It has a retention rate and cushions with a soft texture
Excellent in properties and holding properties, and
It had no distortion and no distortion.

[0048]

Example 2 In Example 1, the woven texture was changed to 61 /
A woven fabric was obtained in the same manner except that the structure was 2.54 cm and the weft was 58 lines / 2.54 cm, as shown in FIG. The breaking strength of this woven fabric was 823 N for warp and 882 for weft per 2.5 cm width.
N and elongation at break were 68% and 86%, respectively. As shown in Table 1, the obtained woven fabric has excellent elastic recovery rate and stress retention rate, and has a soft texture, excellent cushioning properties and holding properties, and has a set and sag after use. There was no distortion and no distortion remained.

[0049]

Example 3 The fluid jet yarn obtained in Example 1 was
Using the weft, a raw material having a warp density of 53 strands / 2.54 cm, a weft density of 43 strands / 2.54 cm, and two wefts was obtained to obtain a flat-structured green fabric. After scouring the greige machine and setting it at 160 ° C., it was subjected to disperse dye dyeing at 120 ° C. with a liquid jet dyeing machine, and set at 150 ° C. to have a density of 61 pieces / 2.54 cm and a weft density of 44 pieces / piece.
A 2.54 cm woven fabric was obtained. The breaking strength of this woven fabric is 2.
657 N, 902 N of weft, and elongation at break were 72% and 88% per 5 cm width, respectively. As shown in Table 1, the obtained woven fabric has excellent elastic recovery rate and stress retention rate, and has a soft texture, excellent cushioning properties and holding properties, and has a set and sag after use. Without
No distortion remained.

[0050]

Example 4 Two kinds of polytrimethylene terephthalates having different intrinsic viscosities were extruded in a side-by-side type at a ratio of 1: 1 to obtain an undrawn yarn at a spinning temperature of 265 ° C. and a spinning speed of 1500 m / min, and then a hot roll temperature of 55 ° C. A hot plate temperature of 140 ° C., a stretching speed of 400 m / min, and a stretching ratio were set such that the fineness after stretching was 84 dtex, and the mixture was stretch-twisted to obtain a 84 dtex / 12f side-by-side composite multifilament. The intrinsic viscosity of the obtained composite multifilament was [η] = 0.88 on the high viscosity side and [η] = 0.70 on the low viscosity side. In addition, the initial tensile resistance, the elongation / elongation / elongation of the actual crimp, the elongation / elongation after hot water treatment, and the heat shrinkage at 100 ° C. are 25 cN / dtex, 25% / 89%, respectively. , 204%
/ 99%, 0.21 cN / dtex.

The resulting 84 dtex / 12f side-by-side type composite multifilament yarns were combined to form 1
Twist of 50 t / m was put, and steam setting was performed at 60 ° C. for 20 minutes. Using this thread for warp and weft, warp density 58 yarns /
A green fabric having a flat structure was obtained by aligning two wefts of 2.54 cm and a weft density of 43 / 2.54 cm. After the greige was scoured with an open-sawper scouring machine, it was set at 160 ° C. in the middle, and the disperse dye was dyed at 120 ° C. with a jet dyeing machine. An inch fabric was obtained. Table 1 shows the evaluation results of the obtained woven fabric. This woven fabric had very excellent elastic recovery and stress retention, and also had excellent softness and cushioning and holding properties. In addition, there was no sagging or bending after use, and no distortion remained.

[0052]

Comparative Example 1 167 dtex / 4 as sheath yarn and core yarn
A fluid jet textured yarn was obtained in the same manner as in Example 1 except that 8f polyethylene terephthalate fiber yarn was used. This processed yarn was dyed using a package dyeing machine under ordinary conditions to obtain a cheese dyed fluid jet processed yarn. Using this thread,
A woven fabric was prepared in the same manner as in Example 1, and a woven fabric was obtained. The breaking strength of this woven fabric was 745 N per 2.5 cm width, weft 1
058N, elongation at break was 39% in longitude and 38% in weft. As shown in Table 1, the obtained woven fabric has a low elastic recovery property and a low stress retention property, has a very hard feeling, has no cushioning property or hold property, and is liable to cause sagging or bending after use. Was left as is.

[0053]

Comparative Example 2 A woven fabric was obtained in the same manner as in Comparative Example 1, except that the weaving structure was the same as in Example 2. The breaking strength of this woven fabric was 941 N per 2.5 cm width, weft 1
019N, elongation at break was 37% in warp and 34% in weft. As shown in Table 1, the obtained woven fabric has low elastic recovery property, low stress retention property, very hard feeling, poor cushioning property and holding property, and is liable to generate sagging and bending after use.
As a result, the distortion remained.

[0054]

[Comparative Example 3] Three 167 dtex / 48f polyethylene terephthalate false twisted yarns were aligned and used as a warp yarn.
392 dtex fluid jet processing yarn made of polyethylene terephthalate yarn processed under normal conditions, two twisted yarns, and a core yarn of 155 dtex spandex, and 392 dtex yarn of polyethylene terephthalate yarn processed under normal conditions A yarn obtained by covering two fluid jet processing yarns alternately was driven into the weft to form a greige machine having the structure shown in FIG. This greige was processed through a normal process to obtain a woven fabric of Comparative Example 3 having a warp density of 66 pieces / inch and a weft density of 29 pieces / inch × 2. The breaking strength of this woven fabric is 1136 N for warp and 1254 N for weft per 2.5 cm width, and the breaking elongation is 49 for each.
%, 48%. As shown in Table 1, the obtained woven fabric has low elastic recovery property and low stress retention property, very hard feeling, poor cushioning property and holding property, and is liable to cause sagging and bending after use, and has a strain. Was left as is.

[0055]

Example 5 167d spun in the same manner as in Example 1
tex / 48f polytrimethylene terephthalate fiber yarn is twisted to 2400T using a pin type false twisting machine.
/ M produced false twisted yarn. The two false twisted yarns are aligned to form a double twister DT-Murata Kikai Co., Ltd.
Twist 130 T / m using 308 and 40
A steam set for minutes was performed to obtain a twisted yarn. Using this yarn for warp and weft, a green fabric having the same structure as that of Example 2 having a warp density of 61 threads / 2.54 cm and a weft density of 59 threads / 2.54 cm was prepared. This greige machine was scoured, dyed, and set in the same manner as in Example 3, and had a length of 74 pieces / 2.54 cm and a weft of 62 pieces / 2.54c.
m were obtained. This woven fabric had an excellent elastic recovery rate and stress retention rate, had a soft feel, was excellent in cushioning properties and holding properties, had no sagging or bending after use, and had no distortion.

[0056]

Comparative Example 4 In Example 5, a 167 dtex / 48f polyethylene terephthalate yarn, which was false-twisted and twisted under ordinary conditions, was used, and a dyeing temperature of 130 ° C. was used. The same as all 65
A woven fabric having a density of 59 pieces / inch and a weft density of 59 pieces / inch was obtained. This woven fabric has a very hard feel, poor elastic recovery and stress retention, poor cushioning and holding properties, and is liable to set or sag after use, and as a result, distortion remains Was to become.

[0057]

Example 6 A monofilament yarn of 390 dtex was produced using polytrimethylene terephthalate having an intrinsic viscosity of 0.92 dl / g and a titanium oxide content of 0.1% by weight under the following production conditions. Polymer discharge rate 2.62 g / min Spinning temperature 265 ° C. Cooling bath temperature 40 ° C. Peripheral speed of take-off roll (first roll) 16.5 m / min Stretching bath water temperature 55 ° C. Peripheral speed of draw roll (second roll) 82.5 m / min Heat treatment bath steam temperature 120 ° C Third roll peripheral speed 75m / min Winding speed 75m / min

The above-mentioned monofilament yarn was used as the warp, and the weft was used as in Example 1;
A greige machine with a flat structure was prepared by aligning four lines / inch and two wefts. After setting the greige machine at 160 ° C, then scouring it in a liquid jet dyeing, dyeing it with a disperse dye at 130 ° C,
To obtain a woven fabric. Table 1 shows the evaluation results of the woven fabric. This woven fabric had an excellent elastic recovery rate and stress retention rate, had a soft feel, was excellent in cushioning properties and holding properties, had no sagging or bending after use, and had no residual strain.

[0059]

[Table 1]

According to the present invention, since it has excellent elongation recovery and stress retention, it has durability and elasticity, does not cause loosening or sag, and has high dimensional stability. It is possible to provide a skin material having abrasion resistance, having a very soft texture, and being excellent in holdability for a human body.

[Brief description of the drawings]

FIG. 1 is a woven fabric diagram used in Example 2 of the present invention.

FIG. 2 is a woven fabric diagram used in Comparative Example 3 of the present invention.

Claims (2)

[Claims] 1. A woven fabric in which at least the warp or the weft is composed of polytrimethylene terephthalate fiber, wherein the woven fabric has an elastic recovery rate of 70% or more at 10% elongation in the warp and weft directions. Fabric for skin material. 2. The fabric for a skin material according to claim 1, wherein the stress retention after 15 minutes under 10% elongation in the warp and weft directions of the fabric is 70% or more.