JP2002069789A - Woven fabric for artificial leather and artificial leather - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain both a woven fabric for an artificial leather, capable of providing a high interlacement strength of single yarn and extrafine yarn of woven fabric, excellent surface flatness, high fiber napping density in the case of napping, excellent lighting effect and excellent natural leather-like appearance, high stretchability and soft feeling and an artificial leather. SOLUTION: (1) This woven fabric for an artificial leather is a woven fabric using a false twisted yarn of a polytrimethylene terephthalate fiber multifilament at least in wefts in which the false twisted yarn is a finished yarn twisted at 0-800 T/m twist count in the direction opposite to the twisting direction of false twisting. (2) This artificial leather is obtained by impregnating a polymer elastic body to texture gaps of a base fabric for an artificial leather obtained by interlacing an extrafine yarn having <=1.1 dtex average fineness of single yarn and the woven fabric for an artificial leather. Elongation at 4.9 N stress per cm width of the artificial leather in the weft direction is 15-45%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial leather fabric and an artificial leather, and more particularly to an artificial leather fabric using trimethylene terephthalate fiber multifilament false twisted yarn and a surface flatness using the fabric. The present invention relates to artificial leather having excellent elasticity, high entanglement strength and soft texture.

[0002]

2. Description of the Related Art Artificial leather for clothing which requires wearing comfort or artificial leather used for sports such as golf and baseball and leisure gloves such as hunting is required to have excellent elasticity. Conventionally, for artificial leather, false twisted yarn such as polyethylene terephthalate has been used in an amount of 200 to 1200 T / m.
And a multifilament such as polyethylene terephthalate having a thickness of 100 to 1500 T /
woven fabric composed of multifilaments having a twist of m (Japanese Patent Application Laid-Open No. 57-82583) and false-twisted multifilament yarns such as polyethylene terephthalate.
Woven fabric having a twist of 199 turns / m (JP-A-58-126)
379). However, the artificial leather using these woven fabrics hardly exhibited elasticity, and had a relatively hard texture.

[0003] As artificial leather having elasticity, 500
An artificial leather having a weft elongation of 20% or more under a load of g / cm (4.9 N / cm) has been proposed (JP-A-61-1326).
No. 84). For this artificial leather, a plain woven fabric having a shrinkage rate of 6.5% in warp and 11.0% weft in hot water using false twisted yarn made of polyethylene terephthalate fiber is used. Shrink 13% in the direction
An artificial leather exhibiting a 6.8% weft elongation is obtained. But,
Due to the large shrinkage in the weft direction in the dyeing process, the artificial leather has small chinchilla-like or grain-like irregularities on its surface, resulting in poor appearance and reduced surface flatness. Further, when the surface is raised with sandpaper or the like to raise the fine fibers, there is also a problem that the surface flatness is inferior, the nap density is reduced, and the lighting effect and the appearance are inferior. Such a problem becomes more remarkable as the elongation rate of the artificial leather in the weft direction is increased. When the elongation is 30% or more, only those having no commercial property can be obtained. As described above, the application of the high stretch property and the application of the surface flatness are in a mutually contradictory relationship, and it has been an extremely difficult technical task to achieve both of these properties. There is also a problem that the texture of the obtained artificial leather is relatively hard.

Further, Japanese Patent Application Laid-Open Nos. 10-331075 and 11-269975 propose using polytrimethylene terephthalate fiber for a woven fabric for artificial leather. In the former, a plain fabric made of a polytrimethylene terephthalate strongly twisted yarn (2000 T / m) is used, and in the latter, a plain fabric made of a 100 d / 48 f drawn polytrimethylene terephthalate drawn yarn twisted at 2500 T / m is used. Have been. However, these artificial leather woven fabrics are made of untwisted raw yarns, so that there is almost no void between the single yarns constituting the multifilament, and the single yarns of the woven fabric and the ultrafine fibers Hardly occurred, and the peel strength (entanglement strength) between the woven fabric and the ultrafine fiber layer was low, which was insufficient for artificial leather products. For example, when artificial leather using the above woven fabric is used for golf or baseball gloves, the microfiber layer on the surface is partially peeled off during playing, and the inner woven fabric is exposed. The appearance is significantly reduced. Moreover, since the fabric for artificial leather uses raw yarns, the stretchability and texture were insufficient.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to provide a high entanglement strength between a single filament of a multifilament constituting a woven fabric and an ultrafine fiber, and to have excellent surface flatness. When raised, the nap density is high, a natural leather-like excellent appearance having an excellent lighting effect, a high elasticity and a soft texture can be imparted to the artificial leather fabric and the artificial leather using the same. To provide.

[0006]

Means for Solving the Problems In view of the above problems, the present inventors have conducted intensive studies, and as a result, the design of a woven fabric used for artificial leather is an important factor, and a specific false twisted yarn is used as the weft of this woven fabric. By using or by performing a specific twist in a direction different from the false twist direction of the false twisted yarn, the entanglement strength of the single yarn of the multifilament constituting the woven fabric and the ultrafine fiber is improved, and the surface is flat. Nevertheless, they have found that artificial leather having excellent stretchability can be obtained, and have completed the present invention. That is, the invention claimed in the present application is as follows.

(1) A woven fabric using a polytrimethylene terephthalate fiber multifilament false twisted yarn as at least a weft, wherein the false twisted yarn has a twist number of 0 to 800 T / in a direction different from the false twisting direction. A woven fabric for artificial leather, wherein the woven fabric has a twist of m. (2) As the warp of the woven fabric, a false twisted yarn of polyethylene terephthalate fiber multifilament, or a false twisted yarn of polytrimethylene terephthalate fiber multifilament is twisted in the same direction as the false twisting direction. The woven fabric for artificial leather according to (1), wherein a processed yarn twisted at several 300 to 1200 T / m is used. (3) The artificial leather according to (1) or (2), wherein the woven fabric has a longitudinal boiling water shrinkage of 5% or less and a weft boiling water shrinkage of 10 to 35%. fabric. (4) The artificial leather woven fabric according to any one of (1) to (3), wherein the woven fabric has an elongation ratio of 15 to 45% under a 4.9 N stress per 1 cm width in a weft direction.

(5) A tissue gap of a base fabric for artificial leather in which ultrafine fibers having an average fineness of a single fiber of 1.1 dtex or less are entangled with the woven fabric for artificial leather according to any of (1) to (4). Artificial leather impregnated with a polymer elastic material, wherein the artificial leather has an elongation rate under a 4.9 N stress per 1 cm width in the weft direction of 15 to 45%. (6) The artificial leather according to (5), wherein the confounding strength of the surface layer of the artificial leather is 5.8 N or more per 1 cm width.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION At least the weft of the artificial leather fabric according to the present invention is a false twisted yarn of polytrimethylene terephthalate fiber multifilament, and has a twist of 0 to 800 T in a direction different from the false twist direction. / M twisted processed yarn is used. In the present invention, the polytrimethylene terephthalate fiber refers to a polyester fiber having a trimethylene terephthalate unit as a main repeating unit, and the trimethylene terephthalate unit has about 50 mol% or more, preferably 70 mol% or more, and more preferably 80 mol%. Above, more preferably 90 mol% or more. Therefore, the total amount of the other acid component and / or glycol component as the third component is in a range of about 50 mol% or less, preferably 30 mol% or less, further 20 mol% or less, more preferably 10 mol% or less. And polytrimethylene terephthalate.

[0010] Polytrimethylene terephthalate is synthesized by polycondensing terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst. In this synthesis process, one or more third components may be added to form a copolymerized polyester. Polytrimethylene terephthalate other than polytrimethylene terephthalate, such as polyethylene terephthalate or nylon, and polytrimethylene terephthalate may be separately synthesized and blended, or composite spinning (sheath core, side-by-side, etc.) may be performed.

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). Also one or three
Compounds having more than one ester-forming functional group (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, antioxidants such as hindered phenol derivatives,
A flame retardant, an antistatic agent, a pigment, a fluorescent brightener, an infrared absorber, an antifoaming agent, and the like may be contained.

The method of spinning the polytrimethylene terephthalate fiber is not particularly limited. For example, a method in which an undrawn yarn is obtained at a winding speed of about 1500 m / min and then stretched at a rate of about 2 to 3.5 times, A direct drawing method (spin draw method) in which a spinning-drawing process is directly connected, and a high-speed spinning method (spin take-up method) with a winding speed of 5000 m / min or more are exemplified. In the present invention, the polytrimethylene terephthalate fiber is used in the form of a multifilament yarn, and may have a uniform thickness or a fine width in the length direction. In addition, the cross section may be a polygonal shape such as a round shape, a triangular shape, an L shape, a T shape, a Y shape, a W shape, an eight leaf shape, a flat shape, a dog bone shape, a multi-leaf shape, a hollow shape, or an irregular shape. Particularly, a round shape is preferable. The fineness of the polytrimethylene terephthalate fiber multifilament is preferably 30 to 280 dtex, which is generally used, and more preferably 50 to 170 dtex. Further, it is preferable that the single yarn fineness is about 1 to 6 dtex. If the single yarn fineness is less than 1 dtex, yarn breakage may occur during false twisting, and if it exceeds 6 dtex, the texture may become hard.

Regarding the physical properties of the polytrimethylene terephthalate fiber, the strength is preferably at least 2.6 cN / dtex, more preferably in the range of 2.6 to 5.0 cN / dtex. If the strength is less than 2.6 cN / dtex, the strength of the false twisted yarn may be low. The elongation is preferably at least 40%, more preferably in the range of 45 to 60%. If the elongation is less than 40%, the frequency of yarn breakage during false twisting may increase. Further, the elastic modulus is preferably 30 cN / dtex or less, and
More preferably, it is ２７27 cN / dtex. 30
If it exceeds cN / dtex, artificial leather with poor softness may be obtained. Furthermore, the elongation recovery rate at 20% elongation is 7
It is preferably at least 0%, more preferably from 80 to 100%. If the elongation recovery rate is less than 70%, the recovery rate against elongation when used for artificial leather tends to decrease.

The false twisted yarn of the polytrimethylene terephthalate fiber multifilament may be of any type such as a pin type, a friction type, a nip belt type and an air twist type, but a more uniform crimped state can be obtained. The pin type is preferable in terms of ease. The false twisted yarn may be either a single-heater false twisted yarn (non-set type) or a two-heater false twisted yarn (set type), but is preferably a single-heater false twisted yarn. By using a false twisted yarn of one heater, an artificial leather having a higher elongation can be obtained due to an extremely high elongation / elongation (300-450%) and a high elongation / elasticity (85% or more). The stretch ratio and stretch modulus of the false twisted yarn are values measured according to the stretch test method (Method C) of JIS-L-1090.

As the physical properties of the false twisted yarn, the elongation recovery rate at 20% elongation is preferably 70% or more,
More preferably, it is 80 to 100%. If the elongation recovery rate is less than 70%, the recovery rate against elongation when used for artificial leather tends to decrease. In order to obtain a false twisted yarn having an elongation recovery rate of 70% or more at 20% elongation, the heat setting temperature during false twisting is preferably in the range of 150 ° C to 190 ° C. If the heat setting temperature exceeds 190 ° C, yarn breakage tends to occur, and if it is lower than 150 ° C, the elongation recovery rate decreases,
The elastic recovery of the stretch material may be insufficient. In addition, the number of false twists T is calculated by dividing the value of the coefficient K by
It is preferably calculated as 00 to 36000, and more preferably in the range of 27000 to 34000. T (T / m) = K / (fineness of original yarn (dtex)) ^1/2

In the present invention, the false twisted yarn of the polytrimethylene terephthalate fiber multifilament has a twist number of 0 to 800 T / m, preferably 0 to 700 T / m, particularly preferably in the direction different from the false twist direction. 100-600T
/ M twist. 800 twists applied to false twisted yarn
If it exceeds T / m, the entanglement strength between the fibers constituting the woven fabric and the ultrafine fibers becomes insufficient. Examples of the form of the false twisted yarn include a form of a non-twisted false twisted yarn, a form of a different direction twisted false twisted yarn that has been twisted in a different direction from a false twist direction, and a yarn that has been previously twisted. The form of the false twisted twisted yarn in which the false twisting is performed in the twisting direction and the different direction may be mentioned, but the crimp shape of the false twisted yarn is fine and uniform, and the spiral core structure is used. Therefore, the form of the different direction additional twist false twisted yarn or the different direction first twist false twisted yarn is preferable. High entanglement strength is obtained by using these processed yarns, and a spring effect is generated by the spiral core structure, and high stretchability and stretchback properties of woven fabric and artificial leather using it are obtained, and the surface is flat. Is easily obtained.

In the case of twisted false twisted yarn, when the twisting is performed in the same direction as the false twisting direction, as the number of times of twist increases, the surface of the woven fabric becomes flat, but on the contrary, the stretchability decreases. ,
When the number of twists is 600 T / m or more, a fabric in which no stretch is expressed can be obtained. This phenomenon is peculiar to the polytrimethylene terephthalate fiber and is not seen in the polyethylene terephthalate fiber. After the false twisted yarn has been twisted, 70% by steam setting or the like.
It is preferable to apply a twisting set at a temperature of ８０80 ° C. for 30 to 60 minutes. Different direction pre-twisted false twisted yarn is a yarn obtained by twisting an original yarn and then false twisting in a direction different from the twisting direction of the twisted yarn.
Since the elongation recovery rate at 0% elongation is 80% or more, a woven fabric having a higher stretch rate can be obtained. If the twist direction of the pretwisted yarn is the same as the twist direction of the false twist, the grain develops on the surface of the woven fabric, and the stretchability decreases. The pre-twisted yarn to which the pre-twist has been added prior to the false twisting process is heated at a temperature of 70 to 80 ° C. for 30 to 60 °
It is preferable to perform twisting for a minute in order to secure workability in the subsequent false twisting step.

The fiber property of the twisted yarn obtained by twisting the false twisted yarn is preferably 2.5 cN / dtex or more, more preferably 2.5 to 5.0 cN / dt.
ex. If the strength is less than 2.5 cN / dtex, the strength of the woven fabric tends to be insufficient. The elongation is preferably 35% or more, more preferably 35 to 60%. If the elongation is less than 35%, the stretchability of a woven fabric tends to be insufficient. The elastic modulus is preferably 20 cN / dtex or less, more preferably 13 to 18 cN / dtex. If the elastic modulus exceeds 20 cN / dtex, the fabric tends to have poor softness. Further, the elongation recovery rate at 20% elongation is preferably 70% or more, more preferably 80 to 1%.
00%. If the elongation recovery rate is less than 70%, the elongation recovery rate when used in a woven fabric tends to decrease.

In the present invention, there is no particular limitation on the warp fibers used in the artificial leather fabric, and for example, polyamide fibers such as polytrimethylene terephthalate fiber, polyethylene terephthalate fiber, polybutylene terephthalate fiber, nylon 6, nylon 66, and acetate. Synthetic fibers such as fibers, natural fibers such as cupra, rayon, cotton, hemp, and wool, and fibers in which these are mixed can be used. These fiber forms may be either long fibers or short fibers, and may be raw yarns or bulky yarns represented by false twisted yarns, but from the viewpoint of high entanglement with ultrafine fibers and soft texture, multifilaments are used. The use of false twisted yarn is preferred.

As will be described later, it is preferable from the viewpoint of surface flatness to set the shrinkage ratio of boiling water in the warp direction of the artificial leather woven fabric low, so that the shrinkage ratio can be set lower. (I) Polyethylene terephthalate False twisted yarn of fiber multifilament, (ii) False twisted yarn of polytrimethylene terephthalate fiber multifilament in the same direction as the false twist direction, with a number of twists of 300 to 1200 T / m, preferably 5
(Iii) a false twisted yarn of polyethylene terephthalate fiber multifilament in the same direction as the false twist direction in the number of twists of 300 to 1200T.
/ M, preferably in the range of 500 to 1000, particularly preferably used. (ii) and (iii)
The processed yarn may be either a co-twisted false twisted yarn or a pre-twisted false twisted yarn, but is more preferably a co-twisted false twisted yarn.

[0021] The boiling water shrinkage of the woven fabric for artificial leather in the present invention is preferably 5% or less, more preferably 4% or less in the warp direction, from the viewpoint of obtaining artificial leather having a flat surface and high elasticity. In the direction, it is preferably 10 to 35%, more preferably 13 to 30%. If the boiling water shrinkage in the warp direction exceeds 5%, it becomes difficult to obtain artificial leather having a smooth surface. The shrinkage rate of boiling water in the weft direction is 10%.
If it is less than 15%, the stretch ratio in the weft direction of the artificial leather is less than 15%, and the stretchability is insufficient, and sometimes the stretchable artificial leather cannot be obtained. On the other hand, if it exceeds 35%, the artificial leather having a smooth surface cannot be obtained. There is. In addition, the elongation rate under a 4.9 N stress per 1 cm width in the weft direction of the woven fabric for artificial leather is 15 from the viewpoint that the surface flatness and the artificial leather having a high elongation rate can be obtained.
Preferably it is 45%, especially 20-40%.

The woven structure of the artificial leather woven fabric in the present invention is not particularly limited, and may be a plain woven structure, a twill woven structure, a satin woven structure,
Various types of changing structures derived therefrom can be applied, but from the viewpoint of the surface flatness of the artificial leather, a relatively plain weaving structure, for example, a plain weaving structure, a 2/2 weft ridge structure (two vertical lines) Weft ridge structure), a twill weave structure, and the like are preferable, and a plain weave structure is most preferable particularly in view of cost.

The warp density and the weft density at the greige stage when weaving a woven fabric for artificial leather differ depending on the total fineness to be used. It is preferable to appropriately adjust the density so that the boiling water shrinkage is 10 to 35%. For example, a false twisted yarn of 165 dtex / 48f polyethylene terephthalate multifilament is used as the warp yarn and 800 T / M twisted in the same direction as the false twist direction, and a false twisting process of 165 dtex / 48f polytrimethylene terephthalate multifilament is used as the weft. The proper warp density when producing a greige machine using a processed yarn obtained by twisting a yarn in a direction different from the false twist direction by 0 to 800 T / m is 42 yarns / 2.
54cm-57 / 2.54cm, preferably 46 /
It is 2.54 cm-53 lines / 2.54 cm. The appropriate weft density is 50 yarns / 2.54 cm to 62 yarns / 2.54 c.
m, preferably 54 / 2.54 cm to 58 / 2.5
4 cm. However, the present invention is not limited to this density range.

The arrangement of the warp and / or weft is Z
/ Z arrangement (array of only Z twisted yarn), S / S array (array of only S twisted yarn), S / Z alternate array (S twisted yarn and Z
One or two twisted yarns may be alternately arranged, or even three or more twisted yarns may be arranged alternately. However, the alternate arrangement of S / Z reduces the torque of the fabric. This is more preferable because the resulting fabric is flat and has no fabric curl. Weaving machines for textiles include fluid jet looms such as air jet looms and water jet looms, rapier rooms, gripper rooms,
Although it is possible to use a fly shuttle room, etc., since it maximizes the stretchability in the weft direction and suppresses the dispersion of the stretch rate in the width direction of the fabric, low tension weft insertion is possible and it is a weft-friendly air jet A fluid jet loom such as a room or a water jet loom is preferred, and an air jet loom is particularly preferred.

The woven fabric for artificial leather in the present invention can be obtained by relaxing and scouring the greige fabric to develop a width, drying, and then heat setting. The equipment used for relaxing scouring of greige machines is U-shaped softer, horizontal softer, open soaper,
A liquid jet dyeing machine or the like can be used, but it is preferable to use a U-shaped softer capable of softly rubbing the greige fabric with a jet stream pressurized in a spread state from the viewpoint of obtaining a flat surface property. The temperature at this time is preferably from 80C to 100C. After that, it is also effective to use a method called a shrink surfer, which passes through an overfeed dry heat relaxing step in a spread form. The temperature at this time is 100 ° C ~
160 ° C is preferable, and more preferably 120 ° C to 150 ° C.
° C. The heat setting temperature is important in determining the boiling water shrinkage of the woven fabric, and is preferably in the range of 130 to 170C, particularly preferably 140 to 160C. When the heat setting temperature is lower than 130 ° C., the setting property is poor, the shrinkage ratio of the water in the warp direction is more than 5% and the shrinkage ratio in the weft direction is more than 35%, and it is difficult to obtain artificial leather having a flat surface. on the other hand,
If the temperature exceeds 170 ° C, the boiling water shrinkage in the weft direction of the fabric is 10%.
, And it is difficult to obtain artificial leather with elasticity.

Next, an artificial leather using the above-described artificial leather fabric will be described. The artificial leather in the present invention is obtained by impregnating a polymer elastic body into a tissue gap of an artificial leather base cloth obtained by entanglement of ultrafine fibers having an average single fiber fineness of 1.1 dtex or less and the above-described artificial leather fabric. The artificial leather has an elongation ratio under a stress of 4.9 N per 1 cm width in the weft direction in the range of 15 to 45%, preferably 20 to 40%. The base fabric for artificial leather used in the present invention is obtained by entanglement of ultrafine fibers and the woven fabric for artificial leather. The entanglement may be in any form as long as the fibers constituting the woven fabric and the ultrafine fibers are intertwined with each other. The form of the ultrafine fibers may be any of a single fiber, a fiber bundle in which the single fibers are collected, and a mixture of the single fibers and the fiber bundle. In addition, either long fibers or short fibers may be used, but short fibers are preferred because high confounding strength can be obtained.

The polymer constituting the ultrafine fibers is not particularly limited, and examples thereof include synthetic fibers such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, nylon 6, nylon 66, and polyacrylonitrile, rayon, cupra rayon, and the like. ,
Particularly, polyethylene terephthalate, polytrimethylene terephthalate, or a mixture thereof is preferably used from the viewpoints of wear resistance, weather resistance and the like. The average fineness of the single fibers of the ultrafine fibers needs to be 1.1 dtex or less.
If the average fineness of a single fiber exceeds 1.1 dtex, the surface quality and feel of the artificial leather become poor, a good writing effect cannot be obtained, and the texture becomes hard. In addition, the surface brushed fibers are liable to cause pilling in terms of abrasion resistance. The smaller the average fineness of the single fibers, the better the texture, surface touch, and lighting effect of the brushed artificial leather. However, if the average fineness is too small, the single yarn strength of the ultrafine short fibers becomes extremely weak, and the surface is easily worn out by abrasion. The average fineness of single fibers of the ultrafine fibers is preferably 0.001 to 0.6 dtex, more preferably 0.01 to 0.3 dtex, and most preferably 0.05 to 0.2 dtex.

The shrinkage of boiling water in the longitudinal direction of the base fabric for artificial leather is 5
% Or less and the shrinkage ratio of boiling water in the weft direction is in the range of 10 to 30%, because an artificial leather having a flat surface and excellent elasticity can be obtained. If the longitudinal boiling water shrinkage exceeds 5%, artificial leather having a smooth surface may not be obtained.
If the boiling water shrinkage in the weft direction is less than 10%, the stretch ratio in the weft direction of the obtained artificial leather is less than 15%, the stretchability is insufficient, and it is difficult to obtain a stretchable artificial leather. If the shrinkage exceeds 30%, it is also difficult to obtain artificial leather having a smooth surface. More preferably, the boiling water shrinkage in the warp direction is 4% or less, and the boiling water shrinkage in the weft direction is 12 to 25%. The base fabric for artificial leather can be obtained, for example, by superposing the above-described woven fabric for artificial leather on a microfiber sheet and performing an entanglement treatment.

The artificial leather of the present invention can be obtained by impregnating the inside of the above-mentioned base cloth for artificial leather with, for example, 3 to 20% by weight of the weight of the artificial leather. As a result, an artificial leather having an effect of preventing extra fine fibers from coming off and an appropriate rigidity, and having an elongation rate of 15 to 45% under a 4.9 N stress per 1 cm width in the weft direction and an elongation recovery rate of 80% or more can be obtained. In addition, the surface is extremely excellent in flatness. If the elongation is less than 15%, the elasticity is insufficient, and if it exceeds 45%, the surface flatness becomes poor. The preferred range of the elongation is 20 to 40%, and the preferred range of the elongation recovery is 85% or more.

The artificial leather according to the present invention has a surface layer having an entangling strength of 5.8 N or more, particularly 6.0 N per 1 cm width.
It is preferable that it is above. If it is less than 5.8N, when used for golf or baseball gloves, the ultrafine fiber layer on the surface is partially peeled off during play, and the woven fabric of the content is exposed, resulting in poor wearing feeling and appearance. There are cases. Since the base fabric for artificial leather used in the present invention has excellent surface smoothness, the nap density of the ultrafine fibers is extremely high by raising the surface layer before or after impregnation of the polymer elastic body. Suede-like artificial leather that is high and has an excellent lighting effect can be obtained. In addition, by coating a polymer elastic body on the surface of the base fabric for artificial leather, it is possible to obtain a grainy artificial leather having excellent surface properties.

Examples of the polymer elastic material used in the present invention include polyurethane elastic material, synthetic rubber such as acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, polybutadiene, neoprene (registered trademark), and polyacrylate. And the like. The preferred impregnation rate of the polymer elastic body to artificial leather is 3 to 20% by weight,
More preferably 4 to 20% by weight, further preferably 5-1.
5% by weight. Further, in order to obtain a brushed artificial leather having a high degree of softness and abrasion resistance which cannot be obtained by conventional brushed artificial leather, it is preferable to use a polyurethane elastic body among the above polymer elastic bodies. Polyurethane elastics include, for example, polyester diols such as polyethylene adipate glycol and polybutylene adipate glycol as polyol components; polyether glycols such as polyethylene glycol (PEG), polypropylene glycol (PPG) and polytetramethylene glycol (PTMG); Polycarbonate diol (PC
G) or the like, and aromatic isocyanate (MDI) such as diphenylmethane-4,4'-diisocyanate, dicyclohexylmethane-
Using an alicyclic isocyanate such as 4,4'-diisocyanate (H12-MDI), an aliphatic diisocyanate such as hexamethylene isocyanate (HMDI),
Glycols such as ethylene glycol as chain extenders,
It is obtained by appropriately selecting and synthesizing diamines such as ethylenediamine, 4,4'-diaminodiphenylmethane, and further, trifunctional alcohols and amines.

Further, a water-dispersed polyurethane elastic material obtained by forced emulsion polymerization from the above-mentioned polyol component, diisocyanate component and chain extender can be used. When the fiber has a strong gripping force and is impregnated into the tissue gap of a nonwoven sheet-like material integrally embedded in the fabric in the inner layer area or the back layer area, the impregnation rate of the water-dispersed polyurethane is 3 to 3. It is possible to suppress the content to the range of 20% by weight, and it is possible to obtain a brushed artificial leather having high abrasion resistance as well as a soft texture and excellent dimensional stability. In this case, the impregnation rate of the water-dispersed polyurethane elastic body to artificial leather is preferably 4 to 15% by weight, more preferably 5 to 12% by weight.

As the water-dispersed polyrethan elastic body, PP
G, PTMG and other polyether glycols and HMDI,
A polyether-based non-yellowing polyurethane elastic material and a polycarbonate-based non-yellowing polyurethane elastic material obtained from H12-MDI or the like are preferable from the viewpoint of heat resistance, hot water resistance, and light resistance. Further, an antioxidant, a light stabilizer and the like as a heat resistance improver may be used in combination with the water-dispersed polyurethane elastic body. These additives and the like can be added during the polymerization of the aqueous polyurethane, in the form of an emulsion after the completion of the polymerization, or in both steps. As antioxidants, hindered amines, hindered phenols and hydrazines are generally used, and hindered amine-based high molecular weight grades exhibit particularly excellent effects.

Hereinafter, the method for producing artificial leather of the present invention will be described with reference to an example of raised artificial leather, but the present invention is not limited to these methods. First, the average single fiber fineness is 1.1
After the ultrafine fibers of dtex or less are cut into short fibers of 20 mm or less, an ultrafine fiber sheet is formed by a wet method. The artificial leather fabric of the present invention is inserted between the two ultrafine fiber sheets, and entangled and integrated by needle punching or high-pressure water flow to obtain an artificial leather base fabric. After buffing the surface of the base fabric for artificial leather with sandpaper or the like, the surface is raised and impregnated and dried with an emulsion of a water-dispersed polyurethane elastic material, or a solution-type polyurethane elastic solution dissolved in a solvent such as DMF. The body is impregnated and wet solidified. Then dyeing treatment,
The artificial leather of the present invention is obtained by post-processing such as antistatic water-repellent treatment.

For the dyeing treatment, a device having a relatively strong rubbing effect such as a jet dyeing machine is used, and the dyeing temperature is from 100 to 135.
C., particularly 110 to 130.degree. C., and the dyeing time is preferably 20 to 100 minutes, particularly 30 to 60 minutes. The artificial leather using the base fabric for artificial leather hardly shrinks in the warp direction by this dyeing treatment, but shrinks relatively largely only in the weft direction. This makes it possible to obtain highly elastic artificial leather having a remarkably flat surface. When a polymer that can be melt-spun is used, an ultrafine fiber web having an average fineness of 0.001 to 0.06 dtex is produced by a melt blow method, and the ultrafine web and the fabric for artificial leather are similarly subjected to a needle punch method or a high pressure water flow. In this manner, the artificial leather of the present invention can be obtained in the same manner as described above by three-dimensionally entangled with each other by the fluid entanglement method.

A sea-island fiber having a sea component of a block polyether polyethylene terephthalate polymer or polystyrene or the like obtained by copolymerizing polyethylene glycol in an amount of 10% by weight or more, and melt-spinning a polymer as an island component is melt-spun. An ultrafine fiber can be obtained by dissolving and removing the block copolymer ester and polystyrene with a 5% hot alkaline aqueous solution or trichloroethylen. The ultrafine fibers thus obtained are also cut into short fibers of 20 mm or less, and then a base cloth for artificial leather and artificial leather can be obtained in the same manner as the ultrafine fibers obtained by the direct spinning method as described above. Further, before the ultrafine treatment of the composite fiber, cut into short fibers of 20 to 80 mm,
A composite fiber web is formed by a known dry method such as a card method or an air lay method, and a woven fabric for artificial leather is laminated, and three-dimensionally entangled by a needle punch method and a columnar flow entanglement method to form a base fabric for artificial leather and an artificial fabric. You can also get leather.

As another method, a composite fiber arranged in a petal type (for example, divided into 5 to 10 parts) is obtained as a first component of a polymer capable of being melt-spun and a second component of another polymer capable of being melt-spun. The composite fiber is cut into a length of 10 mm, and a sheet is formed by a wet method.
Artificial leather is also artificially inserted by inserting a woven fabric for artificial leather between the sheets and dividing it into ultrafine fibers composed of two types of polymers having a single fiber fineness of 1.1 dtex or less by columnar flow entanglement and the like, and at the same time three-dimensionally entangled. A base fabric for leather and artificial leather can be obtained.

[0038]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to Examples.
The evaluation in the examples and comparative examples was measured by the following method. (1) Measurement of ηSP / C ηSP / C is obtained by dissolving a polymer in 0-chlorophenol at a concentration of 1 g / deciliter at 90 ° C., then transferring the obtained solution to an Ostwald viscometer and measuring at 35 ° C. It was calculated by the equation. ηSP / C = (T / T ₀ −1) / C T: Fall time of sample solution (second) T ₀ : Fall time of solvent (second) C: Solution concentration (g / deciliter)

(2) Evaluation of strength and elongation characteristics of fiber Using Tensilon manufactured by Toyo Baldwin Co., Ltd., sample length 20
cm and a tensile speed of 20 cm / min.
N / dtex), elongation at break (%), initial elastic modulus (cN /
dtex) was measured. In addition, from the stress-strain curve, it is assumed that the value
The elongation at 8826 cN / dtex was measured. (3) Elastic recovery rate of fiber at 20% elongation 0.0294 cN / d at 20 cm distance between chucks
tex with an initial load, attached to a tensile tester, and stretched at an elongation rate of 20 cm / min to an elongation rate of 20%.
Let stand for minutes. Thereafter, the material is contracted again at the same speed, and a stress-strain curve is drawn. During shrinkage, the stress is 0.0294 cN /
The elongation at dtex is defined as residual elongation (A). The elastic recovery was determined according to the following equation. Elastic recovery at 20% elongation (%) = [(20−A) / 2
0] × 100 (4) Fiber boiling water shrinkage (BWS) Measured according to JIS-L-1013 hot water shrinkage test method (B). The hot water temperature is about 100 ℃ (boil)
And (5) Boiling water shrinkage of fabric Measured according to JIS-L-1042 B method (boiling water immersion method).

(6) Elongation rate and elongation recovery rate of fabric A test piece of 2.5 cm width × 20 cm length was subjected to an initial stress of 2.942 cN using Tensilon manufactured by Toyo Baldwin Co. 5cm, grip distance 10c
m, the sample is stretched in the weft direction at a tensile speed of 10 cm / min and stretched until a stress of 12.25 N (4.9 N per 1 cm width) is applied. The elongation at this time is defined as L ₁ (mm). Immediately at the same speed, a stress-strain curve is drawn, and the residual elongation when the stress becomes the same as the initial stress is expressed as L ₂ (m
As m), the elongation rate and the elongation recovery rate were determined according to the following equations. Elongation _{(%) = [L 1/} 100] × 100 elongation recovery rate _{(%) = [(L 1} -L 2) / L 1] × 100

(7) Entangling Strength A rectangular sample of 2.5 cm in length and 10 cm in weft is cut out from the artificial leather cloth, and a synthetic rubber adhesive three bond is applied to the entire surface of the sample (the brushed side in the case of brushed artificial leather). 1521 (manufactured by ThreeBond) is applied. Separately, a rectangular thick cloth having a length of 2.5 cm and a length of 10 cm is prepared as a reinforcing cloth, the same adhesive is applied to the entire surface of one side of the reinforcing cloth, and the adhesive-applied surfaces are immediately attached to each other. After the laminated sample is compressed with a mangle, the sample is left at room temperature for 5 hours or more to dry and adhere. Cut this sample with scissors at both ends in 2.5 mm pieces to make a sample of 2.0 cm x 10 cm, cut a boundary between the artificial leather fabric part and the microfiber layer part from the short and long sides with a razor blade, and then use your fingers. Peel off about 2 cm. Using A & D Tensilon Universal Testing Machine (Model RTC-1210A), grip length 2 cm,
Crosshead speed 100 mm / min, recording paper speed 50 mm
/ Min and peel strength is measured. Of the plurality of peaks in the obtained chart, the peak value of three large peaks from the largest peak and the peak value of three small peaks from the smallest peak are read, and the average value of a total of six points is obtained. This was measured for two samples, and the average value (n = 2) divided by 2 (the value per 1 cm width) was defined as the confounding strength.

(8) Surface Appearance The appearance of 10 subjects was visually judged. The surface smoothness and the lighting effect were evaluated by rubbing the surface with a finger. One point was determined to be good and 0 point was determined to be poor. Each person was evaluated, and the surface appearance was determined from the total points according to the following criteria. 9-10 points: 、, 7-8 points: ○, 4-6 points: △, 0-3
Points: × (9) Texture The texture is judged by the tactile sensation of 10 subjects, and the texture flexibility is 1
The points (hardness) were set to 0, and each person was evaluated. From the total score, the texture (softness) was determined according to the following criteria. 9-10 points: 、, 7-8 points: ○, 4-6 points: △, 0-3
Points: ×

Example 1 From 1,3-propanediol and dimethyl phthalate,
Polymerization was conducted by a conventional method to obtain a polytrimethylene terephthalate polymer having [η] of 0.7. This polytrimethylene terephthalate polymer was spun at a spinning temperature of 280 ° C. using a spinneret having a hole diameter of 0.1 mmφ and 350 holes,
It was extruded at a discharge rate of 11.7 g / min. Cooling was performed while blowing cooling air toward the spinning surface immediately below the spinning nozzle to obtain an ultrafine multifilament undrawn yarn at a winding speed of 1200 m / min. Subsequently, the obtained undrawn yarn was drawn at a draw ratio of 2.5 times to obtain a drawn yarn of 165 dtex / 48f. The obtained fiber had a strength of 3.6 cN / dtex, an elongation of 45%, an elastic modulus of 22 cN / dtex, a 20% elongation recovery rate of 88%, and a boiling water shrinkage rate of 13%. The polytrimethylene terephthalate fiber obtained by the above method is subjected to a false twist number of 2500 T / m (false twist coefficient of 32) using a pin type false twisting machine.
307), false twisting was performed at a false twisting temperature of 170 ° C. to obtain a false twisted yarn of one heater (non-set type), and the processed yarn was used as a weft.

On the other hand, for the warp, 165 dtex / 48f
Of a 1-heater false twisted yarn obtained by false twisting polyethylene terephthalate fiber in the Z direction using a double twister DT-308 manufactured by Murata Machinery. Using. At a density of 51 warps / inch and 56 wefts / inch, weft yarns were alternately driven into S / Z, one by one, to obtain a plain weave fabric. Using a U-shaped softer, spread the sculpture at 90 ° C, relax the spread,
After spreading and drying and relaxing the heat at 140 ° C. using a shrink surfer, heat setting was performed at 150 ° C. using a tenter to obtain a woven fabric having a density of 59 yarns / inch and a density of 60 yarns / inch. As shown in Table 1, the obtained woven fabric had high stretchability in the weft direction, was extremely excellent in flatness of the surface, and had a soft texture.

After cutting ultrafine fibers of 35d / 350f polyethylene terephthalate fibers to a length of 3 mm, they were dispersed in water to prepare papermaking slurries for the surface layer and the back layer. Surface basis weight 55 g / m ^2, and a back layer having a basis weight 22 g / m ^2, and inserting the fabric to form a laminated structure the fiber sheet, and then to obtain a three-dimensional entangled sheet by jetting a high-speed water flow. The high-speed water flow is treated with a straight flow injection nozzle with a hole diameter of 0.15 mmφ at a pressure of 340 Pa from the surface layer and 240 Pa from the back layer, a 60-mesh wire mesh is inserted between the sheet and the nozzle, treated at a water pressure of 240 Pa, and dried with a pin tenter. Then, the entangled sheet was manufactured continuously. After buffing the surface layer of this sheet with # 400 emery paper, the emulsion of 7% concentration of emulsion of "Evaphanol AP-12" (Nippon Kagaku Co., Ltd.) (forced emulsification type nonionic polyether non-yellowing type polyurethane elastic body). Sodium sulfate was added as a heat-sensitive coagulant to prepare an impregnating liquid. The squeezing adhesion rate was adjusted with a mangle so that the impregnation rate became 160%. Thereafter, the resultant was continuously dried by heating at 130 ° C. for 3 minutes using a pin tenter dryer. This artificial leather material was dyed at 130 ° C. for 30 minutes using a jet dyeing machine. The resulting brushed artificial leather has a basis weight of 18
4g / m ² , thickness 0.57mm, soft texture,
It had a luxurious soft touch feeling and a surface quality with an excellent lighting effect, and had unprecedented high stretchability and high confounding strength. Table 1 shows the performance data of this artificial leather.

Examples 2 to 6 In Example 1, a false twisted yarn of polytrimethylene terephthalate fiber was used as the weft, and a double twister DT-308 manufactured by Murata Machine Co., Ltd. was used to obtain 500 T / s in a direction different from the false twist direction.
m, twisted at 80 ° C, steamed at 80 ° C for 40 minutes, and used as a plain weave with a density of warp 48 / inch, weft 56 / inch obtained by alternately driving one into S / Z. Except that the tissue greige was treated at each of the heat setting temperatures shown in Table 1, fabrics for artificial leather were produced in the same manner as in Example 1 with a woven density of 58 yarns / inch and a weft of 61 yarns / inch. Then, artificial leather was obtained. Examples 2, 3, 4, 5
As shown in Table 1, the artificial leather obtained in was excellent in surface appearance, had high stretchability and high confounding strength in the weft direction, and had a soft texture. Since the artificial leather obtained in Example 6 had a low heat setting temperature of 120 ° C. of the woven fabric, the longitudinal shrinkage of boiling water in the woven fabric was slightly increased, and the artificial leather obtained from this woven fabric had a high elongation rate. However, the surface appearance was slightly inferior, and the texture was slightly hard.

Example 7 In Example 1, a Z-direction false twisted yarn of polytrimethylene terephthalate fiber was used as a warp yarn in a double twister DT-308 manufactured by Murata Machinery Co., Ltd. for 800 T in the same direction as the false twist direction (Z direction). The fabric for artificial leather and the artificial leather were obtained in the same manner as in Example 1 except that the processed yarn which had been subjected to steam setting at 80 ° C. for 40 minutes was used. As shown in Table 1, the obtained woven fabric was excellent in flatness of the surface and had appropriate stretchability in the weft direction. Further, as shown in Table 1, the obtained artificial leather had excellent surface appearance, high stretchability in the weft direction, high confounding strength, and soft texture.

Example 8 In Example 7, a false twisted yarn of polytrimethylene terephthalate fiber was used as the weft in a different direction from the false twisting.
A woven fabric for artificial leather and an artificial leather were obtained in the same manner as in Example 1 except that the processed yarn having a twist of 00 T / m was used. As shown in Table 1, the obtained woven fabric was excellent in flatness of the surface and had appropriate stretchability in the weft direction. Further, as shown in Table 1, the obtained artificial leather had excellent surface appearance, high stretchability in the weft direction, high confounding strength, and soft texture.

Example 9 In Example 1, as the warp, a textured twisted yarn of polytrimethylene terephthalate fiber in the Z direction was twisted at 800 T / m in a different direction (S) from the false twisting direction. A woven fabric for artificial leather and artificial leather were obtained in the same manner as in Example 1 except for the difference. As shown in Table 1, the woven fabric has a relatively large shrinkage ratio of boiling water in the longitudinal direction, so that the artificial leather obtained from the woven fabric had a slightly inferior surface appearance.

Comparative Example 1 In Example 8, a false twisted yarn of polytrimethylene terephthalate fiber was used as the weft in a direction different from that of the false twisting by 90%.
Example 1 except that a processed yarn twisted at 0 T / m was used.
In the same manner as in the above, a woven fabric for artificial leather and artificial leather were obtained. Since the woven fabric has a large number of false twists of the false twisted yarn, the artificial leather obtained from the woven fabric has low entanglement strength and a slightly poor surface appearance, and is not suitable as artificial leather.

Comparative Example 2 Example 7 was repeated except that, as the warp and the weft, a textured twisted yarn of a polytrimethylene terephthalate fiber yarn was twisted at 700 T / m in the same direction as the false twisting direction. A fabric for artificial leather was obtained in the same manner as in Example 7. As shown in Table 1, this woven fabric had a remarkably low boiling water shrinkage and elongation in the weft direction, and was not at all suitable as a base fabric for artificial leather.

Comparative Example 3 The same procedure as in Example 1 was repeated except that the warp and the weft were formed into a polytrimethylene terephthalate fiber yarn without false twisting.
A woven fabric for artificial leather and artificial leather were obtained in the same manner as in Example 1, except that a strong twisted yarn having a twist of 000 T / m was used. As shown in Table 1, this woven fabric has a low boiling water shrinkage ratio and elongation ratio in the weft direction, and artificial leather obtained from this woven fabric has poor elongation ratio and extremely low entanglement strength, and is not suitable as artificial leather. there were.

Comparative Example 4 A fabric for artificial leather and artificial leather were obtained in the same manner as in Example 8, except that polyethylene terephthalate fiber was used instead of polytrimethylene terephthalate fiber. As shown in Table 1, this woven fabric had a low boiling water shrinkage and elongation in the weft direction, and the artificial leather obtained from this woven fabric had low elongation and elongation recovery. In addition, since this fabric has a large boiling water shrinkage in the longitudinal direction, artificial leather obtained from this fabric has poor surface flatness, and has small irregularities on the entire surface that look like a chinchilla-like pattern, and also has a lighting effect. It was low and the surface appearance was poor. The texture was also hard.

[0054]

According to the woven fabric for artificial leather and the artificial leather of the present invention, the entanglement strength between the single filament of the multifilament constituting the woven fabric and the ultrafine fiber is high, the surface flatness is excellent, and the nap is raised when raised. A natural leather-like excellent appearance having a high density and an excellent lighting effect, and high elasticity and a soft texture can be provided.

[0055]

[Table 1]

Continued on the front page F term (reference) 4F055 AA01 AA27 BA02 EA04 EA11 EA22 EA28 FA15 GA03 HA04 4L035 BB40 BB55 BB91 DD13 EE02 EE08 EE20 FF01 FF08 FF10 4L036 MA05 MA33 PA06 RA03 RA04 4L048 AA21 CAA18 AB11

Claims (6)

[Claims] 1. A woven fabric using a false twisted yarn of a polytrimethylene terephthalate fiber multifilament at least for a weft, wherein the false twisted yarn has a twist number of 0 to 800 T / m in a direction different from the false twisting direction. A woven fabric for artificial leather, characterized in that the woven fabric is a twisted yarn. 2. A warp yarn of the polyethylene terephthalate fiber multifilament or a false twisted yarn of the false twisted yarn or polytrimethylene terephthalate fiber multifilament as the warp of the woven fabric, in the same direction as the false twist direction. The woven fabric for artificial leather according to claim 1, wherein a processed yarn having a number of twists of 300 to 1200 T / m is used. 3. The artificial leather according to claim 1, wherein the woven fabric has a warp boiling water shrinkage of 5% or less and a weft boiling water shrinkage of 10 to 35%. fabric. 4. The method according to claim 1, wherein the width of the fabric is 1 cm in the weft direction.
The fabric for artificial leather according to any one of claims 1 to 3, wherein an elongation rate under a 9N stress is 15 to 45%. 5. A polymer in an interstitial space of an artificial leather base fabric in which ultrafine fibers having an average fineness of a single fiber of 1.1 dtex or less and the artificial leather fabric according to claim 1 are entangled. An artificial leather impregnated with an elastic body, wherein the artificial leather has an elongation rate of 1 under a 4.9 N stress per 1 cm width in a weft direction.
Artificial leather characterized by being 5-45%. 6. The entanglement strength of the surface layer of the artificial leather is 1c.
6. The structure according to claim 5, wherein the width is 5.8 N or more per m width.
The artificial leather according to 1.