JP2007197890A - Woven or knitted fabric for laminating non-woven fabric, composite non-woven fabric and leather like sheet using the same, and method for producing the woven or knitted fabric for laminating non-woven fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woven or knitted fabric for laminating a non-woven fabric for producing a composite non-woven fabric having a stretching property and also flexibility, excellent in surface grace and without a tight feeling, and a composite non-woven fabric and leather like sheet using the same. <P>SOLUTION: The woven or knitted fabric for laminating with the non-woven fabric is provided to have a 15% tensile stress of 0.1 to 5.0 N/cm in at least one direction of length direction or width direction of the woven or knitted fabric for laminating the non-woven fabric. Preferably, fibers constituting the woven or knitted fabric is mainly a polyester side-by-side type conjugate fiber or eccentric sheath-core type conjugate fiber. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a woven or knitted fabric for laminating a nonwoven fabric for obtaining a composite nonwoven fabric excellent in stretchability and resilience, having no feeling of tension, excellent in surface quality, excellent in wear feeling and moldability, and the same. The present invention relates to a composite nonwoven fabric and a leather-like sheet.

  Nonwoven fabrics are used in a wide range of applications such as artificial leather, patch materials, carpets, filters, interior materials, cushion materials, and wipers. These applications require stretchability from the viewpoints of improvement in wear feeling, moldability, and usability, and various studies have been made so far.

  For example, a nonwoven fabric composed of latently crimpable polyester fibers in which two types of polytrimethylene terephthalate having a difference in intrinsic viscosity are combined in a side-by-side manner has been proposed (for example, Patent Document 1). However, the fact is that the latent crimpable polyester fibers constituting the nonwoven fabric have been extremely thinned due to lack of production stability. Accordingly, there have been problems such as difficulty in making the texture flexible and improving the quality of the surface appearance using the technology.

In addition, the artificial leather with excellent stretchability is proposed by laminating a woven or knitted fabric made of latently crimped polyester fibers using polytrimethylene terephthalate with the nonwoven fabric, rather than giving stretch properties to the fibers themselves constituting the nonwoven fabric. (For example, Patent Documents 2 and 3). If it is the said method, the problem mentioned above can be avoided and the manufacture becomes possible comparatively easily. However, although the stretchability has been improved by these methods, problems such as lack of flexibility and feeling of tension have been pointed out.
JP 2003-293255 A JP-A-11-269975 JP 2002-69789 A

  The present invention provides a woven or knitted fabric for laminating nonwoven fabrics for producing a composite nonwoven fabric that has stretch properties, is flexible, has excellent surface quality, and does not produce a feeling of tension.

  Further, another aspect of the present invention provides a composite nonwoven fabric and a leather-like sheet-like material that are excellent in stretchability, flexibility, and surface quality, and do not cause a sense of tension, in which the woven or knitted fabric for nonwoven fabric lamination of the present invention is laminated. To do.

  In order to solve the above problems, the present invention has the following configuration.

  That is, the nonwoven fabric lamination knitted or knitted fabric of the present invention is characterized in that the stress at 15% elongation in at least one of the vertical direction and the horizontal direction is 0.1 to 5.0 N / cm.

  The composite nonwoven fabric and leather-like sheet-like product of the present invention are characterized in that the woven or knitted fabric for laminating the nonwoven fabric of the present invention is laminated.

  The composite nonwoven fabric and leather-like sheet-like material using the above-described nonwoven fabric woven or knitted fabric of the present invention have stretch properties, are excellent in flexibility and surface quality, and do not cause a sense of tension. It is possible to provide excellent clothing and materials having excellent moldability, particularly three-dimensional moldability.

  The woven or knitted fabric for nonwoven fabric lamination of the present invention is a woven or knitted fabric intended to be laminated with a nonwoven fabric. In the present invention, the woven or knitted fabric is a generic term for woven fabric and knitted fabric. The woven fabric is not particularly limited in structure such as plain weave, twill weave and satin weave, but plain weave is preferred in terms of cost and excellent surface smoothness of the nonwoven fabric after lamination. Moreover, as a knitted fabric, a circular knitting, a tricot, Russell, etc. are good, However It does not specifically limit.

  In the present invention, the woven fabric is preferable to the knitted fabric in terms of excellent elongation recovery rate and durability and easy lamination. On the other hand, when the stress at 15% elongation is further reduced, or when it is used for clothing and the drapeability needs to be improved, a knitted fabric is preferable to a woven fabric.

  The woven density in the case of a woven fabric is preferably 50 to 200 / 2.54 cm in both warp and weft because it is difficult to separate from the nonwoven fabric. 70 / 2.54 cm or more is more preferable, and 80 / 2.54 cm or more is more preferable. Moreover, 180 / 2.54 cm or less is more preferable, and 160 / 2.54 cm or less is more preferable. If it is less than 50 / 2.54 cm, the woven fabric structure is difficult to be deformed, handling becomes easy, and physical properties such as strength become strong, which is preferable. However, it is not preferable that the number is 200 / 2.54 cm or less because the laminate property with the nonwoven fabric is lowered.

Basis weight of the woven or knitted fabric, it is 50 to 100 g / ^{m 2} is preferably use a composite nonwoven fabric obtained by laminating a nonwoven fabric is, for example, 250 g / ^{m 2} or lower basis weight, for example clothing use, in the proportion of non-woven fabric It is preferable in that it can be relatively enhanced and the quality and texture can be improved. The basis weight is more preferably 55 g / m ² or more, and further preferably 60 g / m ² or more. Moreover, it is more preferable that it is 85 g / m < ² > or less, and it is further more preferable that it is 80 g / m < ² > or less. When it is 50 g / m ² or more, the characteristics of the woven or knitted fabric can be sufficiently exhibited even after the nonwoven fabrics are laminated. On the other hand, when it exceeds 100 g / m ² , if the amount of the nonwoven fabric is increased accordingly, for example, exposure of the woven or knitted fabric to the surface can be suppressed, but as described above, 250 g / m after lamination of the nonwoven fabric. ^In the case of a low basis weight product of ² or less, it is not preferable in terms of deterioration of quality due to the exposure of the woven or knitted fabric or a texture like a woven or knitted fabric.

  Generally, when evaluating the stretchability of a composite nonwoven fabric (nonwoven fabric laminated with woven or knitted fabric), the stretchability (elongation rate) in a constant load range is emphasized (for example, Patent Document 3), but according to the knowledge of the present inventors. It was found that even a composite non-woven fabric having the same stretchability (elongation rate) as in the present invention has different flexibility and tension. This is a phenomenon that occurs only when a woven or knitted fabric and a nonwoven fabric are laminated, and cannot be assumed by a woven or knitted fabric or a nonwoven fabric alone. In particular, the tendency is remarkable when the nonwoven fabric and the woven or knitted fabric are integrated by entanglement instead of the adhesive. The present inventors have found that this flexibility and the feeling of tension are greatly influenced by the stress in the 15% elongation region, which is a specific elongation region of the woven or knitted fabric laminated on the nonwoven fabric, and have reached the present invention. In other words, in addition to stretchability, it is not enough to simply pursue a high elongation rate under a constant load in order to achieve both flexibility and lack of tension, and the warp or transverse direction of the woven or knitted fabric laminated on the nonwoven fabric By setting the stress at the time of 15% elongation of at least one of the above to a specific range, a composite nonwoven fabric that is excellent in stretchability, excellent in flexibility and surface quality, and does not cause a feeling of tension can be obtained. There is no clear reason why there is a correlation between the low stress at 15% elongation and the lack of tension and good comfort. For example, human skin is bent over elbows, knees, etc., 30% or more. Strictly speaking, it seems that the stress at 30% elongation is affected by the fact that it is stretched, but it is thought that the stress at the time of 15% elongation is affected because there are slippage and clearance in the clothes. It is done.

  In the present invention, the warp direction of the woven or knitted fabric means a warp direction in the case of a woven fabric, a wale in the case of a knitted fabric, and the horizontal direction means a weft direction in the case of a woven fabric and a course in the case of a knitted fabric.

  In the woven or knitted fabric in the present invention, the stress at 15% elongation in at least one of the vertical direction and the horizontal direction is 0.1 N / cm or more, preferably 0.3 N / cm or more, more preferably 0.5 N / cm or more, And it is 5.0 N / cm or less, Preferably it is 3.0 N / cm or less, More preferably, it is 2.0 N / cm or less, More preferably, it is 1.0 N / cm or less. If it is less than 0.1 N / cm, it is difficult to stably laminate. On the other hand, if it exceeds 5.0 N / cm, the texture becomes stiff and a feeling of tension is generated. Further, the 15% elongation stress in the vertical and horizontal directions is preferably 0.1 to 25.0 N / cm, more preferably 0.2 to 20 N / cm, still more preferably 0.5 to 12 N / cm. When it is, the effect of this invention is more remarkable.

  Here, the stress at 15% elongation was measured by a constant speed extension type tensile tester with a width of 2.5 cm and a gripping interval of 10 cm measured according to JIS L 1096 8.12.1 (1999). The sample is stretched in minutes and the stress at 15% elongation is used. From the obtained value, the load per 1 cm width was defined as a stress at 15% elongation (unit: N / cm).

  The fibers constituting the woven or knitted fabric of the present invention are not particularly limited in addition to ordinary drawn yarns, processed yarns, etc., but mainly two or more types of polyester polymers are side-by-side type along the fiber length direction. The bonded composite fiber, or the eccentric core-sheath type composite fiber forming the core-sheath structure in which two or more kinds of polyester polymers are eccentric can be more effective in the present invention, and cost and It is preferable in terms of ease of handling. As long as such a composite fiber is included, a normal fiber may be included as long as the effects of the present invention are not impaired. That is, for example, the composite fiber and another fiber may be combined to be used as a composite yarn, or in the case of a woven fabric, the composite fiber is used only for weft or warp, and the other is used as another fiber. May be used.

  The polyester polymer referred to in the present invention is a polymer such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate and the like. The term “two or more polyester polymers” means that two or more polyester polymers having different physical and / or chemical properties are used. That is, two or more polyester polymers joined in a side-by-side type or an eccentric core-sheath type means that two or more polyester polymers having different physical and / or chemical properties are in the fiber length direction. Is joined to the side-by-side type or the eccentric core-sheath type. Thereby, crimp can be expressed in the composite fiber due to physical or chemical factors. In view of easy crimp expression, it is preferable to use two or more polyester polymers having different heat shrinkability. Thereby, a crimp process can be easily expressed by performing a relaxation process, and the knitted and knitted fabric excellent in stretch property and resilience can be obtained. Examples of the polyester polymer having different heat shrinkability include those having different intrinsic viscosities and polymerization degrees of polymers, and blends of different polymers.

  Moreover, stretchability can be improved as at least 1 sort (s) is a polytrimethylene terephthalate among polyester polymers. In particular, polytrimethylene terephthalate is preferably used as the high shrinkage component because it has excellent stretch properties. In this case, the low shrinkage component of the composite fiber may be a fiber-forming polyester that has good interfacial adhesiveness with polytrimethylene terephthalate, which is a high shrinkage component, and has stable yarn forming properties. However, in consideration of mechanical properties, chemical properties and raw material prices, polytrimethylene terephthalate, polyethylene terephthalate, and polybutylene terephthalate having fiber forming ability are preferable.

  Here, the polytrimethylene terephthalate is a polyester obtained using terephthalic acid as a main acid component and 1,3-propanediol as a main glycol component. However, it may contain a copolymer component capable of forming another ester bond at a ratio of 20 mol%, more preferably 10 mol% or less. Examples of copolymerizable compounds include dicarboxylic acids such as isophthalic acid, succinic acid, cyclohexanedicarboxylic acid, adipic acid, dimer acid, sebacic acid, and 5-sodium sulfoisophthalic acid, ethylene glycol, diethylene glycol, butanediol, and neopentyl glycol. And diols such as cyclohexanedimethanol, polyethylene glycol, and polypropylene glycol, but are not limited thereto.

  On the other hand, when the polyester polymer is polyethylene terephthalate or a copolymer thereof, it is preferable in that the cost can be further reduced.

  If necessary, the polyester polymer may be added with a pigment such as titanium dioxide as a matting agent, fine particles such as silica or alumina as a lubricant, a hindered phenol derivative as an antioxidant, and the like. May be.

  In the present invention, the difference in intrinsic viscosity of the polymer forming the composite fiber is preferably 0.01 to 0.4. If it is 0.01 or more, the stretchability is improved, and if it is 0.4 or less, the spinning stability is good. At this time, a composite fiber in which a low-viscosity polyester having 0.35 to 0.55 and a high-viscosity polyester having an intrinsic viscosity of 0.65 to 0.85 are combined is preferable. In this case, in general, the high-viscosity polyester has higher heat shrinkability than the low-viscosity polyester. As the intrinsic viscosity IV, a value measured as an orthochlorophenol solution at a temperature of 25 ° C. was used.

  The composite ratio of two or more polyester polymers is preferably in the range of high shrinkage component: low shrinkage component = 75: 25 to 35:65 (% by weight), from 65:35 to 45, from the viewpoint of yarn production. : The range of 55 is more preferable.

  The average single fiber fineness of the composite fiber is not particularly limited, but is preferably 1 to 15 dtex. When it exceeds 1 dtex, stretchability and rebound are improved, and when it is less than 15 dtex, it is preferable in that the texture is more flexible.

  In the present invention, for the purpose of making a composite nonwoven fabric with excellent resilience, it is preferable that the fiber containing the composite fiber constitutes a multifilament, and the aggregate of the multifilament forms a spiral shape, More preferably, a hollow structure in the length direction is formed in the central portion of the spiral shape. In particular, when the composite nonwoven fabric of the present invention is a leather-like sheet-like material, substantially composed of fibers, or when the content of the polymer elastic body is 5% or less, the rebound sensation becomes poor, This is an effective means to compensate for this. The hollow structure does not have to be taken by all the fibers, and even if it is only partially formed, it has the effect of improving the feeling of rebound.

  Furthermore, the number of twists of the multifilament is preferably 500 to 3000 T / m, and more preferably 800 to 2000 T / m, in that this preferable shape can be easily obtained. In the case where the single filaments are dispersed or the phase of crimp is shifted, this preferred shape tends to be difficult to obtain.

The air permeability of the woven or knitted fabric of the present invention is preferably 60 cc / cm ² / sec or more, more preferably 110 cc / cm ² / sec or more, and further preferably 210 cc / cm ² / sec or more. If it is 60 cc / cm ² / sec or more, particularly when laminated with a nonwoven fabric by entanglement with a needle punch or water jet punch, lamination uniformity and peel strength are improved, which is preferable. Moreover, when laminating | stacking with a nonwoven fabric with an adhesive agent etc., it is preferable at the point which the drying efficiency or heating efficiency, etc. of an adhesive agent improve. The upper limit of the air flow rate is not particularly limited, and the higher the tendency is, the higher the lamination property is. However, the strength of the woven or knitted fabric tends to decrease. For this reason, the air flow rate is appropriately set with the required strength according to the purpose of use as the upper limit, but is usually 1000 cc / cm ² / sec or less, for example.

The value obtained by the JIS L 1096 8.27.1 (1999) A method (fragile type) is used as the air flow rate here. The upper limit of the air flow rate obtained by the method is limited by a measuring device, for example, about 400 cc / cm ² / sec, but the nonwoven fabric lamination knitted or knitted fabric of the present invention does not have this value as the upper limit, and the measurement limit It may be more than. The upper limit is appropriately set depending on the required strength of the composite nonwoven fabric.

  In order to obtain a composite nonwoven fabric having excellent surface quality, the warp direction elongation of the woven or knitted fabric is preferably 5% or more, more preferably 10% or more, and further preferably 15% or more. Moreover, 50% or less is preferable, 45% or less is more preferable, and 40% or less is further more preferable. If it is 5% or more, better stretchability can be obtained as a composite nonwoven fabric, and if it is less than 50%, the air permeability tends to be excellent, and as a result, the process passability during lamination and the laminateability with the nonwoven fabric are exhibited. It is preferable because it is excellent.

  Furthermore, it is preferable that the elongation recovery rate in the vertical direction or the horizontal direction of the woven or knitted fabric is preferably 75 to 100%, more preferably 80 to 100%, and more preferably 85 to 100%. More preferably it is. If it is 75% or more, deformation due to use hardly occurs, which is preferable.

  Moreover, it is preferable that the boiling water shrinkage rate of the woven or knitted fabric is less than 10% in both the vertical and horizontal directions, more preferably less than 8%, and even more preferably less than 5% in that the surface quality of the nonwoven fabric is excellent. When the content is less than 10%, the surface of the composite nonwoven fabric is less likely to be uneven due to storage or thermal history due to dyeing or aging after lamination with the nonwoven fabric, which is preferable. The lower limit is preferably 0% or more for the same reason as described above.

  The value obtained by the JIS L 1096 (1999) 8.64.4 B method (boiling water immersion method) is used for the boiling water shrinkage of the present invention.

  The woven or knitted fabric of the present invention is limited to the use laminated on the nonwoven fabric, but such nonwoven fabric is not particularly limited, short fiber nonwoven fabric or long fiber nonwoven fabric, needle punch nonwoven fabric or papermaking nonwoven fabric, spunbond nonwoven fabric or melt blown nonwoven fabric, It can be applied to all nonwoven fabrics expressed in various categories such as electrospun nonwoven fabric. It is preferable that it is a short fiber nonwoven fabric rather than a long fiber nonwoven fabric at the point which can exhibit the effect of this invention more.

  In the case of a short fiber nonwoven fabric, the fiber length is preferably 10 mm or more, more preferably 20 mm or more, and further preferably 30 mm or more. Moreover, 70 mm or less is preferable and 60 mm or less is more preferable. It is preferable that the fiber length is 10 mm or more because the fiber is less likely to fall off due to friction and is excellent in wear resistance and surface quality. Moreover, it is preferable for it to be 70 mm or less, since the entanglement is improved and pilling is less likely to occur.

  The fiber length refers to a case where 100 fibers are randomly sampled from the surface of the nonwoven fabric and at least 50 fibers are in the range.

  Moreover, in this invention, the single fiber fineness which comprises a nonwoven fabric becomes like this. Preferably it is 0.001-0.3 dtex, More preferably, it is preferable that it is 0.005-0.15 dtex. When it is 0.001 dtex or more, for example, when the composite nonwoven fabric is used for applications that require strength such as clothing and furniture, it is preferable because it has sufficient strength for practical use. Moreover, it is preferable that it is 0.5 decitex or less because the texture becomes more flexible and the effects of the present invention can be further exhibited. In addition, the fiber of the fineness outside the said range may be contained in the range which does not impair the effect of this invention.

  The method for laminating the nonwoven fabric and the woven or knitted fabric for laminating the nonwoven fabric of the present invention is not particularly limited, and can be performed by adhesion or entanglement. Among these, it is preferable to be laminated by entanglement from the viewpoint of excellent flexibility and stretchability. The entangled state is not particularly limited, and examples thereof include a state in which the woven and knitted fabric and the ultrafine fibers are entangled with each other three-dimensionally. The ultrafine fiber may include a bundle of ultrafine fibers, but there is one ultrafine fiber until almost no bundle of ultrafine fibers is observed in terms of improving the peel strength from the fabric. Most preferably, it is dispersed in one.

  Another aspect of the present invention is a composite nonwoven fabric in which the woven or knitted fabric for nonwoven fabric of the present invention is laminated. The composite nonwoven fabric in which the woven and knitted fabric for nonwoven fabric lamination and the nonwoven fabric according to the present invention are laminated has advantages such as excellent stretchability, flexibility, surface quality, and no feeling of tension. It can be suitably used for interior materials.

  Among these uses, it is preferable to use a leather-like sheet in that the effects of the present invention can be used more effectively. Conventionally, a leather-like sheet is generally produced by impregnating an appropriate amount of a polymer elastic body, but in the present invention, in particular, it eliminates the feeling of tension and exhibits good stretchability and flexibility. Therefore, even when impregnated, the amount of the polymer elastic body such as polyurethane is preferably less than 10% by weight, more preferably less than 5% by weight, and less than 3% by weight. Is more preferable. Furthermore, it is most preferable that it is not contained substantially.

  That is, it is most preferable that it is substantially made of a fiber material and does not substantially contain a polymer elastic body. If the polymer elastic body is contained in a large amount, the adhesiveness between the fibers increases and the stretchability deteriorates, which is not preferable. Here, “substantially made of a fiber material” means that it consists only of a fiber material that is a constituent element of a general leather-like sheet-like material and a fiber material of a polymer elastic body. Other processing agents used in processing, for example, dyes, softeners, abrasion resistance improvers, various fastness improvers, antistatic agents or fine particles may be included in the leather-like sheet of the present invention. .

  Here, “substantially made of a fiber material” means that the elastic polymer is not substantially observed when the surface is observed with an SEM, a microscope or the like.

  When a polymer elastic body is included in the leather-like sheet-like material of the present invention, the polymer elastic body is not particularly limited. For example, polyurethane, acrylic, which has been conventionally used for leather-like sheet-like materials, Alternatively, styrene-butadiene or the like can be used. Among these, it is preferable to use polyurethane in terms of flexibility, strength, quality, and the like. The method for producing polyurethane is not particularly limited, and can be produced by appropriately reacting a conventionally known method, that is, polymer polyol, diisocyanate, and chain extender. Moreover, although it may be a solvent type or an aqueous dispersion type, an aqueous dispersion type is preferred from the viewpoint of the working environment.

  Further, the leather-like sheet material of the present invention preferably has a vertical elongation of 5-30% as defined by JIS L 1096 (1999) 8.14.1 A method, and is 7-25%. More preferably, it is more preferably 10 to 20%. If it is 5% or more, the stretchability becomes better, and an excellent design is possible when it is used as clothing, which is preferable. On the other hand, if it is 30% or less, production management such as tension and wrinkles becomes particularly easy, which is a preferable range.

  Moreover, it is preferable that the elongation rate of a horizontal direction is 10 to 50%, It is more preferable that it is 15 to 40%, It is further more preferable that it is 20 to 35%. If it is 10% or more, better stretch properties can be obtained, and if it is 50% or less, a good elongation recovery rate can be obtained, and a leather-like good texture can be obtained, which is preferable.

  In addition, it is preferable that the stretch rate in the horizontal direction is larger than that in the vertical direction because a good silhouette can be expressed particularly in the case of clothing.

  Furthermore, the elongation recovery rate specified by JIS L 1096 (1999) 8.14.2 A method is preferably 75 to 100% in both the vertical and horizontal directions, more preferably 80 to 100%, and 85 ˜100% is more preferable. It is preferable for the elongation recovery rate to be 75% or more because it is less likely to lose its shape due to strain due to use.

  In the present invention, the formation direction of the nonwoven fabric is the vertical direction, and the width direction of the nonwoven fabric is the horizontal direction. The formation direction of the nonwoven fabric can generally be determined from a plurality of factors such as the fiber orientation direction, streak traces due to needle punching or high-speed fluid treatment, and treatment traces. If it is impossible to estimate and judge the vertical direction for reasons such as conflicting judgments due to these multiple factors, lack of clear orientation, or streak traces, the maximum tensile strength The vertical direction is the vertical direction, and the direction perpendicular thereto is the horizontal direction.

  Next, an example of the preferable manufacturing method of the woven / knitted fabric for nonwoven fabric lamination of this invention is shown.

  The 15% elongation stress of the nonwoven fabric woven or knitted fabric can be easily brought within the scope of the present invention by the fiber or the woven or knitted fabric structure. For example, imparting stretchability to the fiber is a preferred method. The means is not particularly limited, but is mainly a composite fiber in which two or more kinds of polyester polymers are bonded side-by-side along the fiber length direction, or a core sheath in which two or more kinds of polyester polymers are eccentric. It is preferable to use an eccentric core-sheath type composite fiber forming the structure from the viewpoint of cost and ease of handling. The production method of the composite fiber is not particularly limited, but for example, it is obtained by forming a side-by-side composite flow using two types of polyester polymers and then discharging the composite fiber from a discharge hole for obtaining a desired cross-sectional shape. Can do. After the discharged yarn is cooled and solidified, it may be produced by a two-step method in which it is wound once and then stretched or stretched false twisted. Alternatively, it may be directly stretched by drawing directly after spinning. It may be manufactured.

  In order to stably manufacture such a composite fiber, the intrinsic viscosity of each component and the intrinsic viscosity difference between the components are important. Even in the case of a composite fiber, it is not practical if the viscosity of one side component is too low to have fiber forming ability, or conversely, it is too high to require a special spinning device. Further, the difference in viscosity between the components determines the degree of yarn bending (bending phenomenon) immediately below the discharge hole, which greatly affects the yarn-making property.

  After the production of the fiber, it is then made into a woven or knitted fabric. Here, when manufacturing a woven fabric, the loom is not particularly limited to a shuttleless loom such as a water jet loom or an air jet loom, a fly shuttle loom, a tappet loom, a dobby loom, a jacquard loom or the like. The stress at 15% elongation can be controlled by the number of warp yarns. When the same fiber is used, the stress at 15% elongation tends to decrease as the number of warp yarns decreases. Further, in order to increase the air flow rate, it can be obtained by reducing the cover factor of the fabric.

  The knitted fabric may be either a weft knitting or a warp knitting. The weft knitting is manufactured by, for example, a weft knitting machine, a circular knitting machine, etc., and the warp knitting is produced by a tricot machine, a miranese machine, a Russell machine, etc. Can do. The knitted fabric can reduce the stress when stretched by 15% from the woven fabric.

Next, the woven or knitted fabric is contracted by relaxing as necessary, and intermediate setting is performed. It is a preferable production method of the present invention that the stress at 15% elongation and the boiling water shrinkage rate are within the scope of the present invention depending on the relaxing conditions and the intermediate setting conditions. Even in a woven or knitted fabric manufactured from the same fiber, this process is important in the present invention because the stress at 15% elongation and the boiling water shrinkage ratio differ greatly depending on the relaxation treatment and the intermediate set. In general, when a woven or knitted fabric woven using the same fiber and under the same conditions is used, the known relaxation conditions and intermediate set conditions have been optimized using the target elongation rate as an index. Therefore, in the woven or knitted fabric for laminating nonwoven fabrics, the necessary elongation rate of the woven or knitted fabric is usually determined by using the elongation rate of the composite nonwoven fabric as the object laminated with the nonwoven fabric as an index. At this time, if the same elongation rate can be obtained, generally, a condition in which the shrinkage rate of the woven fabric is as small as possible is set from the viewpoint of the cost and the lamination property with the nonwoven fabric. However, in the case of the woven or knitted fabric for laminating the nonwoven fabric of the present invention, in order to obtain the reduction of the feeling of stickiness and the flexibility which are the effects of the present invention, the elongation rate is not used as an index as described above, and the stress at 15% elongation is used as an index. Set the conditions as follows.
When performing relaxation treatment, open spreader, continuous expansion relaxer, expansion continuous refining machine, softer (manufactured by Nissen Co., Ltd.), conveyor refining machine, etc., continuous expansion relaxing machine, beam, airflow, rotary washer, jigger, wins The shrinkage treatment is performed at a temperature of 80 ° C. or higher, preferably 90 ° C. or higher, more preferably 105 ° C. or higher by a batch type processing machine such as a liquid dyeing machine. The upper limit is 140 ° C. or lower, preferably 130 ° C. or lower, more preferably 120 ° C. or lower. When the temperature is less than 80 ° C. or exceeds 140 ° C., the stress at 15% elongation tends to increase, which is not preferable. In the present invention, since the elongation rate of the nonwoven fabric is not determined by the elongation rate of the woven or knitted fabric, it is not particularly necessary to emphasize the elongation rate of the woven or knitted fabric. It is preferable to appropriately set conditions for low stress at 15% elongation. It should be noted that a relaxation treatment that shrinks while being accompanied by a stagnation action, particularly a relaxation treatment using a liquid dyeing machine, is particularly preferable in the present invention because it is easy to lower the 15% elongation stress of the fabric. Is the method. Other methods for performing a relaxation treatment that shrinks while squeezing in a batch type include a method using a rotary washer, an air current, and a Wins dyeing machine.

  Prior to the relaxation process using a liquid dyeing machine, a two-stage relaxation process is performed in which a pre-shrinking process is performed with a continuous spreading-type continuous relaxation processing machine, that is, shrinking into a continuous spreading pattern and then further shrinking while squeezing in a batch system. Is preferable in that a uniform shrinkage treatment can be performed. When performing a two-stage relaxation process, it is preferable to perform the first-stage continuous expansion shrinkage process at 80 to 105 ° C. 90 degreeC or more is preferable and 95 degreeC or more is further more preferable. Shrinkage occurs at 80 ° C. or higher, but if it exceeds 105 ° C., the shrinkage in the horizontal direction increases, making it difficult to balance the vertical direction. Moreover, when shrinking with a stagnation action in the second stage batch system, it is preferably performed at 100 to 140 ° C. 105 degreeC or more is more preferable, and 110 degreeC or more is further more preferable. Moreover, 130 degrees C or less is more preferable, and 120 degrees C or less is still more preferable. By giving a stagnation action at a temperature of 100 ° C. or higher, the stress at 15% elongation can be lowered. On the other hand, if it exceeds 140 ° C., the stress at 15% elongation tends to increase, which is not preferable.

  If the shrinkage rate is increased, the stretchability of the woven or knitted fabric can be increased, but on the other hand, the air permeability is reduced.

  The intermediate set is an important process in that the stress at 15% elongation of the woven or knitted fabric and the boiling water shrinkage of the woven or knitted fabric can be controlled. Generally, the intermediate set temperature is 100 to 190 ° C. with dry heat or wet heat, but in the present invention, the boiling water shrinkage can be easily controlled within the preferred range of the present invention, and the surface quality when a composite nonwoven fabric is obtained is excellent. In this respect, the temperature is preferably 140 ° C. or higher, more preferably 165 ° C. or higher, and further preferably 175 ° C. or higher. When the temperature is less than 140 ° C., the laminated composite nonwoven fabric is shrunk due to thermal history such as dyeing or a change with time, and the surface quality is deteriorated. In addition, it is preferable to carry out by dry heat rather than wet heat because it is simple and has a cost reduction effect.

  Further, in the intermediate set, overfeeding in the vertical direction is preferable in that the stress at 15% elongation of the nonwoven fabric lamination knitted or knitted fabric of the present invention can be reduced. The overfeed rate is preferably 1 to 15%, more preferably 2 to 10%.

  By laminating the woven or knitted fabric for laminating the nonwoven fabric thus obtained with the nonwoven fabric, it is possible to obtain a composite nonwoven fabric which is rich in stretch properties and is flexible and free of tension.

  Next, an example of the manufacturing method of the nonwoven fabric laminated | stacked with the woven / knitted fabric for nonwoven fabric lamination of this invention, the composite nonwoven fabric formed by laminating the nonwoven fabric for nonwoven fabric lamination and a nonwoven fabric, and a leather-like sheet-like manufacturing method is demonstrated.

  The single fiber fineness of the nonwoven fabric laminated on the woven or knitted fabric for nonwoven fabric of the present invention is preferably 0.0001 to 0.5 dtex as described above, but the production of so-called ultrafine fibers in which the single fiber fineness is in the range. The method is not particularly limited, and may be a method of producing a nonwoven fabric such as a spunbond method, a melt blow method, an electrospinning method, a flash spinning method, etc. in addition to a normal filament spinning method. In addition, as a means for obtaining ultrafine fibers, a method of directly spinning ultrafine fibers, a fiber having a fineness and capable of generating ultrafine fibers (hereinafter referred to as ultrafine fiber-generating fibers), and then spinning ultrafine fibers are obtained. A method of generating fibers may also be used.

  Here, as a method of obtaining ultrafine fibers using ultrafine fiber generation type fibers, specifically, a method of removing sea components after spinning sea-island type fibers, or splitting after spinning of split-type fibers Thus, it is possible to adopt means such as a method of ultra-thinning.

  Among these means, in the present invention, it is preferable to produce ultrafine fibers from the viewpoint that ultrafine fibers can be obtained easily and stably. Further, when a leather-like sheet is used, the same kind is used. It is more preferable to manufacture with an island-in-sea fiber in that an ultrafine fiber made of the same kind of polymer that can be dyed with a dye can be easily obtained.

It does not specifically limit as a method of obtaining a sea-island type fiber, For example, the method etc. which are described in the following (1)-(4) are mentioned.
(1) A method of spinning by blending two or more polymers in a chip state.
(2) A method in which a polymer of two or more components is kneaded in advance to form a chip and then spun.
(3) A method in which two or more polymers in a molten state are mixed in a spinning machine pack by a static kneader or the like.
(4) A method of manufacturing using a die such as Japanese Patent Publication No. 44-18369 and Japanese Patent Application Laid-Open No. 54-116417.

  In the present invention, it can be satisfactorily produced by any of the methods, but the method (4) is most preferable because the selection of the polymer is easy.

  In the method (4), the cross-sectional shape of the island fiber obtained by removing the sea-island fiber and the sea component is not particularly limited. For example, the shape is round, polygonal, Y-shaped, H-shaped, X-shaped. Examples include a mold, a W-shape, a C-shape, and a π-shape.

  Examples of a method for producing a composite nonwoven fabric in which an ultrafine fiber nonwoven fabric and a woven or knitted fabric are laminated include, for example, a method of making a slurry for making ultrafine fibers in a woven or knitted fabric, and entanglement and integration of an ultrafine fiber generating fiber and a woven or knitted fabric Thereafter, a method of generating ultrafine fibers, a method of producing an ultrafine fiber nonwoven fabric, and then entangled and integrated the knitted and knitted fabric can be adopted, although it is not particularly limited, but a high quality surface can be obtained. Once the ultrafine fiber nonwoven fabric is manufactured, a method of entanglement and integration with the woven or knitted fabric is preferable. At this time, the woven or knitted fabric may be disposed on one side or between the nonwoven fabrics, and is not particularly limited.

  As a method for obtaining the ultrafine fiber nonwoven fabric, a wet method or a dry method may be used, but a dry method is preferable in that the fiber is less dropped during friction.

  The fiber length is preferably cut to 10 to 70 mm for the dry method and 0.1 to 20 mm for the wet method.

  As a preferable production method as a dry method, a method of producing a short fiber nonwoven fabric by a needle punch method using 1 to 10 dtex ultrafine fiber generation type fibers capable of generating ultrafine fibers, and then obtaining an ultrafine fiber nonwoven fabric by ultrafinening Is mentioned. In addition, it is preferable that the short fiber nonwoven fabric of the ultrafine fiber generating fiber is excellent in surface quality and shape stability when it is shrunk by dry heat or wet heat, or both, and further densified.

  The nonwoven fabric obtained in this way is then laminated with the woven or knitted fabric for nonwoven fabric lamination of the present invention. As the means, it can be performed by adhesion, entanglement or the like, but in terms of flexibility, lamination by entanglement is preferable. When laminating by entanglement, for example, needle punching or high-speed fluid treatment can be performed, and high-speed fluid treatment that can laminate without damaging the woven or knitted fabric of the present invention is particularly preferable.

  As the high-speed fluid processing, water jet punch processing is preferable from the viewpoint of the working environment. At this time, the water flow is preferably performed in a columnar flow state. The columnar flow is usually obtained by ejecting at a pressure of 1 to 60 MPa from a nozzle having a diameter of fluid injection holes of 0.06 to 1.0 mm. In this treatment, in order to obtain efficient entanglement and good surface quality, the diameter of the nozzle (fluid injection hole) is preferably 0.06 to 0.15 mm, the nozzle interval is preferably 5 mm or less, and the diameter is 0. 0.06 to 0.12 mm, and the nozzle interval is more preferably 1 mm or less. These nozzle specifications do not need to be all the same when processing multiple times. For example, a nozzle having a large hole diameter and a small hole diameter can be used in combination, but the nozzle having the above configuration is used at least once. It is preferable.

  Further, in order to achieve uniform entanglement in the thickness direction and / or to improve the smoothness of the nonwoven fabric surface, it is preferable to perform high-speed fluid treatment repeatedly many times. Moreover, the water flow pressure is appropriately determined according to the basis weight of the nonwoven fabric to be treated, and the higher the basis weight, the higher the pressure.

  Further, for the purpose of highly entanglement of the ultrafine fibers, it is preferable to treat at least once with a pressure of 10 MPa or more, and more preferably at least once with a pressure of 15 MPa or more. In addition, the upper limit is not particularly limited, but the cost increases as the pressure increases, and the nonwoven fabric may be non-uniform if the basis weight is low, or fluff may be generated due to fiber cutting, which is preferable. Is 40 MPa or less, more preferably 30 MPa or less.

  Thus, the composite nonwoven fabric of this invention can be manufactured by laminating the nonwoven fabric lamination knitted fabric of this invention and a nonwoven fabric. The composite nonwoven fabric of the present invention has stretchability, flexibility, excellent surface quality, and no feeling of tension, so a leather-like sheet, a patch material, clothing, furniture, carpet, a filter, an interior material, a cushion material, It can be used for wipers, polishing cloths, etc. In particular, the leather-like sheet is preferable as an application of the composite sheet of the present invention.

  When the leather-like sheet-like material of the present invention includes a polymer elastic body, the polymer elastic body is impregnated in a solution or dispersion state. In terms of excellent working environment, it is particularly preferable to impregnate in the state of an aqueous dispersion dispersed in water. A heat-sensitive gelling agent, a crosslinking agent, a stabilizer, a penetrating agent, and the like may be added to the dispersion of the water-dispersed polymer elastic body.

  After impregnating the dispersion of the water-dispersed polymer elastic body, the nonwoven fabric containing the dispersion is heated with dry heat, hot water, hot water, atmospheric or high-pressure steam, microwaves, etc. to gel (solidify) ) Process. For example, an apparatus for heating with steam includes an atmospheric steamer, a high temperature steamer, and the like. It is preferable to use an apparatus that can use both steam and microwave because a high migration preventing effect can be obtained.

Further, in order to obtain a surface with a silver tone according to the use, a surface layer portion made of a polymer elastic body may be further formed on the surface by coating or lamination.
In order to finish the surface with a raised surface, an appropriate method such as buffing with sandpaper or the like can be employed.
The leather-like sheet of the present invention is preferably dyed by a liquid dyeing machine. Further, after dyeing, various functional processing such as water repellent processing, antibacterial processing, anti-pill processing, or high color processing can be performed in addition to soft processing.

  The leather-like sheet-like material of the present invention thus obtained has no tension, is rich in flexibility, has excellent stretch properties, moldability, and surface quality, such as clothing, car seats, sundries, or materials. Can be used for a wide range of applications.

  Hereinafter, the present invention will be described in detail with reference to examples. In addition, the following method was used for the measuring method of each physical-property value in an Example.

  In addition, Reference Examples 1 to 3 described below describe the manufacturing conditions of the woven fabric and the nonwoven fabric used in the examples.

A. Intrinsic viscosity IV
0.8 g of the sample polymer was dissolved in 10 ml of orthochlorophenol (hereinafter abbreviated as OCP), the relative viscosity ηr was determined from the following equation using an Ostwald viscometer at 25 ° C., and the intrinsic viscosity IV was calculated.

ηr = η / η0 = (t × d) / (t0 × d0)
Intrinsic viscosity IV = 0.0242ηr + 0.2634
Where η: viscosity of the polymer solution
η0: OCP viscosity
t: Dropping time of solution (second)
d: Density of solution (g / cm ³ )
t0: OCP fall time (seconds)
d0: OCP density (g / cm ³ ).

B. Stress at 15% elongation JIS L 1096 (1999) 8.12.1 Standard time In method A (label strip method), the test piece width was 2.5 cm, the distance between grips was 10 cm, and the elongation rate was 100% / min. The stress at the time of elongation was obtained and defined as the stress per 1 cm width (N / cm).

C. Elongation rate In JIS L 1096 (1999) 8.14.1 A method (constant speed extension method), it measured as 20 cm of grip intervals.

D. Elongation recovery rate JIS L 1096 (1999) 8.14.2 Measured according to A method (repetitive constant speed extension method) with a grip interval of 20 cm.

E. Aeration rate Measured according to JIS L 1096 8.27.1 A method (Fragile method) (1999) using a Frazier type fabric permeability tester (model AP-360, manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.).

F. Boiling water shrinkage rate Measured by JIS L 1096 (1999) 8.64.4 B method (boiling water immersion method).

G. Flexibility In the same manner as in Section B, the stress at 10% elongation was measured (N / cm) and used as the index. The smaller the value, the better the flexibility.

H. Surface quality A 30 cm test piece was prepared, and the surface was touched by 10 panelists, and the unevenness was relatively evaluated. The evaluation was made in four stages (◎: no unevenness, ○: almost no unevenness, Δ: somewhat unevenness, ×: unevenness).

I. Tightness feeling Ten panelists wear the sample stitched to the jacket elbow, 4 stages (◎: No feeling of feeling, ○: Little feeling of feeling, △: Some feeling of feeling of tension It was felt, and it was evaluated as “x: there was a sense of tension and the comfort was poor”.

Reference example 1
A low-viscosity component consisting of 100% polyethylene terephthalate having an IV of 0.50 and a high-viscosity component consisting of polyethylene terephthalate having an IV of 0.75 are bonded to the side-by-side at a weight compound ratio of 50:50 and spun and stretched. A composite fiber of decitex 12 filaments was obtained. This was additionally twisted at 1500 T / m and steam set at 65 ° C. Using this yarn, a woven fabric (A) having a 2/2 oblique structure with a warp density of 95 / 2.54 cm and a weft density of 85 / 2.54 cm was produced.

Reference example 2
A woven fabric (B) was produced in the same manner as in Reference Example 1 except that a plain woven fabric having a warp density of 94 / 2.54 cm and a weft density of 65 / 2.54 cm was used.

Reference example 3
A web was prepared through a card and a cross wrapping using sea island type short fibers having a single fiber fineness of 3 dtex, 36 islands and a fiber length of 51 mm consisting of 45 parts of polystyrene as a sea component and 55 parts of polyethylene terephthalate as an island component. Then, 1 is treated with implantation density of 1500 / cm ² at barb type needle punch machine to obtain a short fiber non-woven fabric of fibers apparent density 0.21 g / cm ^3. Next, it is immersed in an aqueous solution of polyvinyl alcohol (PVA) 12% having a polymerization degree of 500 and a saponification degree of 88% heated to about 95 ° C. so as to give an adhesion amount of 25% based on the weight of the nonwoven fabric. Simultaneously with the impregnation of PVA, a shrinkage treatment was performed for 2 minutes, and dried at 100 ° C. to remove moisture.

The obtained sheet was treated with trichrene at about 30 ° C. until the polystyrene was completely removed, and ultrafine fibers having a single fiber fineness of about 0.046 dtex were obtained. Then, using a Murota Seisakusho Co., Ltd. standard漉割machine, the split processing of a split cut into two in a direction perpendicular to the thickness direction, to obtain a fiber in terms of basis weight 90 g / m ² nonwoven fabric .

Reference example 4
0.1 decitex polyethylene terephthalate fiber was cut into a length of 0.5 cm, and a paper web having a basis weight of 31 g / m ² was obtained by a paper making method.

Example 1
The fabric obtained in Reference Example 1 was treated at 95 ° C. with a continuous expansion relaxer, then at 110 ° C. with a liquid dyeing machine, and then an intermediate set at 180 ° C. with an overfeed rate of 3%. As a result, a nonwoven fabric lamination fabric having a warp density of 136 / 2.54 cm, a weft density of 105 / 2.54 cm, and a basis weight of 75.5 g / m ² was obtained. As a result of SEM observation of the cross section of the obtained woven fabric, it was confirmed that the fibers constituting the woven fabric formed a spiral structure in a multifilament state, and the central portion formed a hollow structure. The evaluation results of this nonwoven fabric lamination fabric are shown in Table 1.

Example 2
The woven fabric obtained in Reference Example 1 was treated at 95 ° C. with a continuous expansion relaxer, then further treated at 130 ° C. with a liquid dyeing machine, and then at 180 ° C. with an overfeed rate of 3% with a pin tenter. An intermediate set was performed to obtain a nonwoven fabric lamination fabric having a warp density of 158 yarns / 2.54 cm, a weft density of 110 yarns / 2.54 cm, and a basis weight of 89.1 g / m ² . As a result of SEM observation of the cross section of the obtained woven fabric, it can be confirmed that the fibers constituting the woven fabric form a spiral structure in a multifilament state as in Example 1, and the central portion forms a hollow structure. It was. The evaluation results of this nonwoven fabric lamination fabric are shown in Table 1.

Example 3
The woven fabric obtained in Reference Example 2 was treated in the same manner as in Example 1, and a nonwoven fabric laminated fabric having a warp density of 113 / 2.54 cm, a weft density of 82 / 2.54 cm, and a basis weight of 53.6 g / m ^2. Got. As a result of SEM observation of the cross section of the obtained woven fabric, it can be confirmed that the fibers constituting the woven fabric form a spiral structure in a multifilament state as in Example 1, and the central portion forms a hollow structure. It was. The evaluation results of this nonwoven fabric lamination fabric are shown in Table 1.

Example 4
The knitted fabric obtained in Reference Example 1 was treated in the same manner as in Example 1 except that the intermediate setting was performed at 140 ° C., and the warp density was 132 / 2.54 cm, the weft density was 100 / 2.54 cm, and the basis weight was 72. A nonwoven fabric lamination fabric of .8 g / m ² was obtained. As a result of SEM observation of the cross section of the obtained woven fabric, it can be confirmed that the fibers constituting the woven fabric form a spiral structure in a multifilament state as in Example 1, and the central portion forms a hollow structure. It was. The evaluation results of this nonwoven fabric lamination fabric are shown in Table 1.

Comparative Example 1
The woven fabric obtained in Reference Example 1 was treated at 95 ° C. with a continuous expansion relaxer, followed by intermediate setting at 130 ° C. with a 3% overfeed rate with a pin tenter, and a warp density of 131 yarns / 2.54 cm. to give weft density 93 present per 2.54 cm, the nonwoven laminated fabrics having a basis weight of 64.7 g / ^{m 2.} As a result of SEM observation of the cross section of the obtained woven fabric, some of the fibers constituting the woven fabric formed a helical structure in a multifilament state less frequently than in Examples 1 to 4, but the hollow portion was observed. I couldn't. The evaluation results of this nonwoven fabric are shown in Table 1.

Comparative Example 2
A warp density of 105 yarns / 2.54 cm, a weft density of 99 yarns / 2.54 cm, except that the temperature of the continuous spreading relaxer was 70 ° C. and the temperature of the liquid dyeing machine was 85 ° C., A nonwoven fabric lamination fabric having a basis weight of 55.6 g / m ² was obtained. As a result of SEM observation of the cross section of the obtained woven fabric, a part of the fibers constituting the woven fabric was less than Examples 1-4, forming a helical structure in a multifilament state more frequently than Comparative Example 1, The hollow portion could not be observed. The evaluation results of this nonwoven fabric are shown in Table 1.

Examples 5-8
The nonwoven fabric fabric obtained in Examples 1 to 4 and the papermaking web obtained in Reference Example 4 were overlapped to form a water jet punch machine having a nozzle diameter of 0.1 mm from the papermaking web side and nozzle heads of 0.6 mm intervals. The water jet punching was performed at a processing speed of 6 m / min and a pressure of 9 MPa. Next, the nonwoven fabric obtained in Reference Example 3 was layered on the fabric side, and from the nonwoven fabric side, water jet punching was performed at a processing speed of 1 m / min, pressures of 10 MPa and 20 MPa, and the same processing was performed from the back side, and the composite nonwoven fabric. Got.

  The surface of the composite nonwoven fabric thus obtained was subjected to raising treatment with sandpaper. Further, the laminated sheet was dyed with a liquid dyeing machine using a “Sumikaron Blue S-BBL200” (manufactured by Sumika Chemtex Co., Ltd.) at a concentration of 20% owf at 120 ° C. for 45 minutes. did. The obtained sheet is immersed in an aqueous solution containing a softening agent (amino-modified silicone emulsion “Aldac AN980SF” manufactured by One Corporation) and fine particles (colloidal silica “Snowtex 20L” manufactured by Nissan Chemical Industries, Ltd.), and colloidal silica. After squeezing to a content of 0.1%, it was dried at 100 ° C. while brushing.

  The leather-like sheet-like material thus obtained was excellent in stretchability and flexibility as well as in surface quality, had no feeling of tension, and had a texture with a moderate resilience and fullness. The leather-like sheet material (Example 6) using the woven fabric obtained in Example 2 is more stretchable than the leather-like sheet material (Example 5) using the woven fabric obtained in Example 1. Were almost the same, but they were excellent in flexibility and lack of sense of tension. Further, focusing on the boiling water shrinkage, the leather-like sheet obtained from the fabric of Example 1 having a small boiling water shrinkage (Example 5) is the leather-like obtained from the fabric of the Example 4 having a large boiling water shrinkage. The surface quality was superior to that of the sheet-like material (Example 8). The evaluation results of the obtained leather-like sheet are shown in Table 2.

Example 9
The composite nonwoven fabric prepared in the same manner as in Example 5 was adjusted with emulsion polyurethane ("Evaphanol APC-55" manufactured by Nikka Chemical Co., Ltd.), migration inhibitor ("Neo Sticker N" manufactured by Nikka Chemical Co., Ltd.) and water. The obtained dispersion was impregnated so that the solid content of polyurethane was 2% by weight, and heat-treated at 140 ° C. for 5 minutes.

  Then, in the same manner as in Example 5, brushing and dyeing were performed, and a softening agent and colloidal silica treatment were performed. The obtained leather-like sheet was slightly reduced in elongation rate and flexibility as compared with Example 5. The obtained results are shown in Table 2.

Comparative Examples 3 and 4
A leather-like sheet was obtained in the same manner as in Example 5 except that the nonwoven fabric lamination fabric obtained in Comparative Examples 1 and 2 was used. The leather-like sheet (Comparative Example 3) using the woven fabric obtained in Comparative Example 1 was very inferior in surface quality as a result of shrinkage caused by dyeing and formation of irregularities on the surface. Moreover, although the leather-like sheet-like article (Comparative Example 4) using the woven fabric obtained in Comparative Example 2 was excellent in surface quality as in Example 5, it was said that the feeling of stickiness exceeded the allowable range. Evaluation results were obtained and the texture was firm. The results are shown in Table 2.

Claims (20)

A woven or knitted fabric for laminating a nonwoven fabric, wherein a stress at 15% elongation in at least one of a vertical direction and a horizontal direction is 0.1 to 5.0 N / cm.   The fiber constituting the woven or knitted fabric is mainly a composite fiber in which two or more kinds of polyester polymers are bonded side by side along the fiber length direction, or a core sheath in which two or more kinds of polyester polymers are eccentric. The woven or knitted fabric for laminating a nonwoven fabric according to claim 1, which is an eccentric core-sheath type composite fiber forming a structure.   The woven or knitted fabric for nonwoven fabric lamination according to claim 2, wherein the polyester polymer is polyethylene terephthalate or a copolymer thereof.   The woven or knitted fabric for nonwoven fabric lamination according to any one of claims 1 to 3, wherein the fibers constituting the woven or knitted fabric are multifilaments, and the multifilaments have a spiral shape. The woven or knitted fabric for nonwoven fabric lamination according to any one of claims 1 to 4, wherein the air permeability of the woven or knitted fabric is 60 cc / cm ² / sec or more.   The woven or knitted fabric for laminating nonwoven fabric according to any one of claims 1 to 5, wherein the boiling water shrinkage is less than 10% in both the vertical and horizontal directions.   The woven or knitted fabric for nonwoven fabric lamination according to any one of claims 1 to 6, wherein the weave density is 50 to 200 / 2.54 cm in both warp and weft. Nonwoven laminating woven or knitted fabric according to any one of claims 1-7, characterized in that the basis weight is 50 to 100 g / ^{m 2.}   The woven or knitted fabric for laminating nonwoven fabric according to any one of claims 1 to 8, which is used for a leather-like sheet.   A woven or knitted fabric for laminating nonwoven fabric according to any one of claims 1 to 9 and a nonwoven fabric composed of fibers having a fiber length of 10 to 70 mm are laminated.   The composite nonwoven fabric according to claim 10, wherein the nonwoven fabric is composed of ultrafine fibers of 0.0001 to 0.5 dtex.   The leather-like sheet-like article which consists of a composite nonwoven fabric of Claim 10 or 11.   The leather-like sheet-like product according to claim 12, which is substantially made of a fiber material.   The leather-like sheet-like material according to claim 12, wherein the polymer elastic body is contained in an amount of less than 10% by weight. A method for producing a woven or knitted fabric according to any one of claims 1 to 9, wherein the following steps are performed in this order.
A. Mainly a composite fiber in which two or more kinds of polyester polymers are bonded side-by-side along the fiber length direction, or an eccentric core having a core-sheath structure in which two or more kinds of polyester polymers are eccentric. The process of manufacturing a woven or knitted fabric using a sheath type composite fiber.
B. A process of relaxing the knitted or knitted fabric by shrinking it into a continuous expanded form, and then shrinking it further with a batch method.
C. The process of performing an intermediate set.   The method for producing a woven or knitted fabric for laminating a nonwoven fabric according to claim 15, wherein the shrinkage of the continuous expanded fabric is performed at 80 to 105 ° C.   The method for producing a woven or knitted fabric for laminating nonwoven fabric according to claim 15, wherein the shrinkage performed while the batch type stagnation is performed by a liquid dyeing machine.   The method for producing a woven or knitted fabric for laminating nonwoven fabric according to any one of claims 15 to 17, wherein the shrinkage performed while batch-type stagnation is performed at 100 to 140 ° C.   The method for producing a woven or knitted fabric for nonwoven fabric lamination according to any one of claims 15 to 18, wherein the intermediate setting is performed at 140 to 190 ° C.   The method for producing a woven or knitted fabric for nonwoven fabric lamination according to any one of claims 15 to 19, wherein an overfeed rate of the intermediate set is 1 to 15%.