JP2019178452A - Composite laminate and its production method - Google Patents

Abstract

To provide a composite laminate which can combine functionality and an external aesthetic property, in particular, while remaining an amount used of an oil solution imparted to the elastic fiber externally as ever to the minimum least, by using the elastic fiber stably unwound, while preventing contamination of the device, has a high adhesive force due to an adhesive resin, and has excellent uniformity and retention of folds of a gather part, and excellent hold shape developability after storage by extension winding, and its production method.SOLUTION: It is a compound laminated body which has an elastic fiber arranged between the textiles of two sheets at two or more parallel, and resin which is installed side by side in two or more directions which intersect an elastic fiber, and joins an elastic fiber to each textile of two sheets, between the parts where resin which is adjacent to in the longitudinal direction of an elastic fiber, and an elastic fiber cross, each textile of two sheets and an elastic fiber have separated, this composite laminate has a ratio of a fineness of an elastic fiber to a fineness of a fiber constituting a fabric of 0.5 or larger and 300 or smaller and an elastic fiber contains 0.1 to 10 mass% of an agglutination prevention agent.SELECTED DRAWING: None

Description

  The present invention relates to a composite laminate and a method for producing the same, and more particularly, clothing that adheres to the skin, specifically underwear, sportswear, sanitary materials such as children's and adult paper diapers, sanitary products, and the like. It is a composite laminate with elasticity that can be suitably used for applications, has high adhesive strength between the elastic fibers used and the fabric, has excellent functionality, has excellent uniformity of wrinkles, and has a beautiful appearance In addition, the present invention relates to a composite laminate that can be stably unwound and prevent contamination of the apparatus while minimizing the use of conventional oil agents in the elastic fiber wound body during production, and a method for producing the same. Is.

  Conventionally, in applications that adhere to the skin such as sanitary materials such as disposable diapers, stretchable materials have been used in order to improve the feeling of wearing and the wearing stability. For example, in a paper diaper, a composite laminate in which elastic fibers are inserted between laminated nonwoven fabrics is used to improve the fit with the body such as underbody, abdomen, waist, etc., or to prevent urine leakage. Have been used.

  Such a composite laminate having elasticity is often manufactured by laminating a plurality of elastic fibers in a predetermined draft and laminating with a plurality of sheet-like fabrics such as a nonwoven fabric while maintaining the state. Many of the body forms have hot melt resin extending in the direction parallel to the elastic fibers in the sheet-like fabric such as non-woven fabric, and such a composite laminate is frequently used for paper diapers and is the mainstream gather member. (For example, Patent Document 1).

  Further, when forming the gather member, a plurality of elastic elastic members (elastic fibers) are arranged between sheet-like fabrics such as non-woven fabrics, and the heat-bonding fibers are extended in the direction intersecting the elastic elastic members, Gather member (for example, patent document 2) which fixed the elastic expansion-contraction member between the sheet-like fabrics by the heat-seal | fusing by the adhering fiber, or hot melt adhesive instead of the heat-sealable fiber is applied in a predetermined pattern in a predetermined range. Gather which is arranged in a striped pattern in a direction intersecting the elastic elastic member by a so-called application method called a design coat, and the elastic elastic member is intermittently fixed to the fabric in the longitudinal direction via the hot melt adhesive A member (for example, Patent Document 3) is known. Furthermore, regarding a design coat for forming a hot melt adhesive coating layer, a design coat coating system and a coating method using a design roller having an uneven plate are also known (for example, Patent Document 4).

  When manufacturing the composite laminate as described above, for example, elastic fibers (for example, polyurethane elastic yarn) are unwound from the elastic fiber wound body, and a predetermined draft (stretch ratio) is given to stretch the elastic fibers. The yarn is fed between sheet-like fabrics such as non-woven fabrics, and the elastic fibers and the sheet-like fabric are intermittently joined via an adhesive resin such as hot melt adhesive, and the fabric forms wrinkles in the unjoined section. It becomes possible, and the function of a gather part can be exhibited, and the composite laminated body provided with the gather part is manufactured.

  In the production of such a composite laminate, the elastic laminate is stable in a state without sticking from the elastic fiber wound body, because the composite laminate has a uniform wrinkle and has a desired gather section performance and a beautiful appearance. It is important to solve the problem. In order to improve the unwinding property of the elastic fiber, in particular, when the elastic fiber has a fineness, a silicone-based or mineral-based oil is generally applied (for example, Patent Document 5).

  However, the method of applying the oil agent to the elastic fiber from the outside of the elastic fiber has a problem that the oil agent mist is generated as the elastic fiber travels, so that the device is soiled. In addition, the oil agent has poor compatibility with the hot melt adhesive and the like as described above, and there is a problem that the adhesiveness (adhesive force) is lowered.

Japanese Patent Laying-Open No. 2005-320636 JP2013-202056A JP 2017-185336 A JP 2014-076077 A JP-A-6-41873

  Therefore, the object of the present invention is to achieve both the functionality and appearance aesthetics in the gathered portion required for advanced paper diaper products and clothing, and in particular, the use of an oil agent imparted to elastic fibers from the outside as in the past. By using elastic fibers that can be stably unwound while keeping the surface to a minimum, the adhesive strength of the adhesive resin is high while preventing contamination of the device, and the uniformity and retention of the wrinkles in the gathered area An object of the present invention is to provide a composite laminate that is excellent in wrinkle shape expression after winding and storage, and a method for producing the same.

  In order to solve the above problems, a composite laminate according to the present invention includes a plurality of elastic fibers arranged in parallel in one direction between two fabrics, and a plurality of fibers in one direction intersecting the elastic fibers. A composite laminate comprising the two fabrics arranged side by side and a resin for joining the elastic fibers, wherein the resin adjacent to each other in the longitudinal direction of the elastic fibers intersects the elastic fibers The two fabrics are separated from the elastic fibers, the ratio of the fineness of the elastic fibers to the fineness of the fibers constituting the fabric is 0.5 to 300, and the elastic fibers are anti-sticking agents. Is contained in an amount of 0.1 to 10% by mass.

  In such a composite laminate according to the present invention, the elastic fiber is a fabric on both sides through a resin that is accurately applied to a predetermined region of the composite laminate in a predetermined direction by a so-called design coat. A structure in which the elastic fibers are separated from each other between the portions where the resin and the elastic fiber are adjacently joined in the longitudinal direction of the elastic fiber and the adjacent resin and the elastic fiber intersect in the longitudinal direction of the elastic fiber. Is formed with high regularity and has a high degree of expansion and contraction function, and a composite laminate including a gather portion having a good fit at the time of wearing and a smooth and regular wrinkle is realized. And in order to improve the external appearance aesthetics of such a composite laminated body provided with such a gathered part, in particular, in order to obtain an external appearance in which the presence of elastic fibers is not conspicuous, in the present invention, elasticity with respect to the fineness of the fibers constituting the fabric is obtained. A configuration in which the ratio of the fineness of the fibers is 0.5 or more and 300 or less is adopted. And in order to enhance the appearance aesthetics of the composite laminate, the adhesive strength by the bonding resin as described above is high and the desired functionality is more reliably exhibited, and the uniformity of wrinkles in the gathered portion is high. In the invention, in particular, a configuration in which the elastic fiber itself contains 0.1 to 10% by mass of the anti-sticking agent is employed. Since the elastic fiber itself contains a specific amount of anti-sticking agent, the elastic fiber can be wound without causing the elastic fiber to stick together while minimizing the use of an externally applied oil agent. Since the yarn is stably unwound from the body and fed between two pieces of fabric, the form of the elastic fiber itself interposed between the two pieces of fabric and the form of joining of the elastic fiber and the two pieces of fabric are as follows: It becomes possible to stably maintain the target desired state, and as a result, the uniformity of wrinkles in the gathered portion is enhanced. Moreover, since the oil agent given from the outside like the conventional one is suppressed to the minimum, the decrease in the adhesive force due to the bonding resin is prevented, the desired high adhesive force is maintained, and the target in the gather portion Desirable functionality is ensured. Further, as will be described later, since the oil agent applied from the outside as in the prior art is minimized, contamination of the manufacturing apparatus by the oil agent mist is prevented in the manufacturing process.

  In the composite laminate according to the present invention, the anti-sticking agent is preferably a resin-based, hydrocarbon-based, fatty acid-based, aliphatic amide-based, aliphatic ester-based or metal soap-based anti-sticking agent.

  Specifically, cellulose ester, polyolefin and copolymer thereof, polystyrene and copolymer thereof, liquid paraffin, paraffin wax, synthetic polyethylene wax, stearic acid, stearyl alcohol, organic stearate, stearamide, oleamide, erucic acid Amide, methylene bis stearamide, ethylene bis stearamide, stearic acid monoglyceride, stearyl stearate, ethoxypolyethylene glycol stearate, lead stearate, zinc stearate, calcium stearate, magnesium stearate are preferred.

  Particularly preferred are resin-based anti-sticking agents and stearic acid derivatives such as amides, esters and metal soaps derived from stearic acid, and at least one selected from cellulose esters, calcium stearate, magnesium stearate, and organic stearates. It is preferable to contain. Of these, the cellulose ester is preferably composed of an acid containing an organic acid having 2 to 22 carbon atoms and a compound derived from cellulose. Most preferred is a combined use of a cellulose ester and a stearic acid derivative.

  Furthermore, the fabric preferably contains a resin-based, hydrocarbon-based, fatty acid-based, aliphatic amide-based, aliphatic ester-based, metal soap-based anti-sticking agent, and contains an anti-sticking agent similar to the elastic fiber. It is preferable that the same anti-sticking agent as the elastic fiber is contained.

Further, in the composite laminate according to the present invention, in order to further increase the commercial value of the composite laminate having a gathered portion, the elastic fiber in the composite laminate cannot be seen or the elastic fiber exists in the visual appearance. It is preferable to satisfy the requirement that the elastic fiber cannot be confirmed, or the elastic fiber is very difficult to see or its existence is very difficult to confirm. In order to satisfy such a requirement, the present invention employs a configuration in which the ratio of the fineness of the elastic fiber to the fineness of the fiber constituting the above-mentioned fabric is 0.5 or more and 300 or less, and the composite laminate is made of the elastic fiber. when the outer surface of the fabric from the outside of the composite laminate began to colorimetry by spectrophotometer in a direction intersecting with the elastic fibers in extended state extending direction to stretched to the maximum, L ^* value is a maximum value ^{L *} values at the point shown, ^{a *} value, ^{b *} value ^{(L * 1, a * 1} , b * 1) and ^{L * L} value at the point showing the minimum value ^* value, ^{a *} value, ^{b *} value ( L ^* 2, a ^* 2, b ^* 2) can be used to form a composite laminate having a color difference variation ΔE ^* v defined by the following formula of 1.0 or less.
^{ΔE * v = √ [(L} * 1-L * 2) 2 + (a * 1-a * 2) 2 + (b * 1-b * 2) 2]

This color difference variation ΔE ^* v is measured with a spectrocolorimeter in the direction in which the outer surface of the fabric intersects the elastic fiber from the outside of the composite laminate with the composite laminate stretched to the maximum in the extending direction of the elastic fiber. This is expressed by the above equation and indicates the degree of variation in color difference in the colorimetric direction. When the fabric and elastic fiber are of the same color system, the color difference variation ΔE ^* v is particularly affected by the degree of change in the L ^* value indicating the brightness, thereby confirming whether the elastic fiber is easily visible and visible. Ease and difficulty are affected. As the color difference variation ΔE ^* v is larger, the change in the color difference at the intersection with the elastic fiber is larger. Therefore, it is easier to see the elastic fiber and to confirm the presence of the elastic fiber in appearance. When the color difference variation ΔE ^* v is 1.0 or less, the elastic fiber cannot be seen or the presence of the elastic fiber cannot be confirmed, or the elastic fiber is very difficult to see or its existence is very difficult to confirm. The required characteristics will be met. Therefore, it has a desired stretch function, excellent fit when worn, smooth texture, good regularity of wrinkles, and an aesthetic appearance with a homogeneous appearance that makes the presence of elastic fibers inconspicuous when viewed from the outside. An excellent composite laminate is realized.

  Further, in the composite laminate according to the present invention, the fineness of the elastic fiber is not particularly limited, but is preferably in the range of 1 to 3000 dtex, more preferably 10 to 300, from the viewpoint of productivity. Decitex range.

  Moreover, in the composite laminated body which concerns on this invention, it is preferable that the thickness in the location where resin and elastic fiber which extend in one direction cross | intersect is 0.1 mm or more and 5.0 mm or less, and 0.1 mm or more and 2 More preferably, it is 0.0 mm or less.

  Further, in the composite laminate according to the present invention, the maximum value of the thickness of the composite laminate between the portions adjacent to the longitudinal direction of the elastic fiber and intersecting the resin extending in one direction and the elastic fiber is 1 mm or more and 20 mm. The following is preferable.

  Further, in the composite laminate according to the present invention, the width of one resin extending in one direction is 0.2 mm or more and 10 mm when the composite laminate is extended to the maximum in the extending direction of the elastic fiber. The following is preferable. Such a preferable resin width can be accurately adjusted by the design coat.

  In the composite laminate according to the present invention, the interval between the resins extending in one direction is preferably 1 mm or more and 20 mm or less in the state where the composite laminate is extended to the maximum in the extending direction of the elastic fiber. .

  Moreover, in the composite laminated body which concerns on this invention, it is preferable that the heat softening point of an elastic fiber is 100 degreeC or more and 240 degrees C or less. As a result, the bonding with the design-coated resin can be easily performed.

  Furthermore, in the composite laminate according to the present invention, the resin extending in one direction arranged in a direction intersecting with the elastic fiber contains the same component as the constituent component of the fabric and / or elastic fiber. Is preferred. This facilitates the bonding with the design-coated resin.

  In the method for producing a composite laminate according to the present invention, a plurality of elastic fibers are fed in parallel in one direction between two fabrics, and the resin that joins each of the two fabrics and the elastic fibers is The two fabrics and the elastic fibers are supplied or generated in parallel in one direction intersecting with the elastic fibers, and between the two fibers and the elastic fibers adjacent to each other in the longitudinal direction of the elastic fibers. When producing a composite laminate in which the fabrics are separated, the ratio of the fineness of the elastic fibers to the fineness of the fibers constituting the fabric is 0.5 or more and 300 or less, and the anti-sticking agent is 0.1 as the elastic fibers. It consists of the method characterized by using the elastic fiber containing 10 mass%.

  In the method for producing a composite laminate according to the present invention, a so-called design coat or the like is applied to a predetermined region with a required amount in a predetermined direction with high accuracy, or by ultrasonic waves or heating. The elastic fibers are intermittently bonded to the fabrics on both sides in the longitudinal direction in the longitudinal direction of the elastic fibers in a desired form through the bonding resin generated from the fabric itself and the elastic fibers themselves. The structure in which the two fabrics and the elastic fibers are separated between the portions where the resin and the elastic fibers adjacent in the direction intersect with each other is configured with high regularity and has a high degree of stretching function. It becomes possible to realize a composite laminate including a gather portion having a fit and a smooth and well-ordered ridge. In producing this composite laminate, in order to enhance the appearance aesthetics of the composite laminate having such a gathered portion, in particular, in order to obtain an appearance in which the presence of elastic fibers is not noticeable, the method according to the present invention is used. The ratio of the fineness of the elastic fiber to the fineness of the fiber constituting the fabric is 0.5 to 300. And in order to enhance the appearance aesthetics of the composite laminate, the adhesive strength by the bonding resin as described above is high and the desired functionality is more reliably exhibited, and the uniformity of wrinkles in the gathered portion is high. In the method according to the invention, in particular, an elastic fiber containing 0.1 to 10% by mass of an anti-sticking agent is used. Since the elastic fiber itself contains a specific amount of anti-sticking agent, the elastic fiber can be wound without causing the elastic fiber to stick together while minimizing the use of an externally applied oil agent. In order to be stably unwound from the body, the shape of the elastic fiber itself supplied between the two fabrics and interposed between the two fabrics, and the joining mode of the elastic fibers and the two fabrics are targeted. It is possible to stably maintain the desired state, and as a result, the uniformity of the wrinkles in the gathered portion is enhanced. Moreover, since the oil agent given from the outside like the conventional one is suppressed to the minimum, the decrease in the adhesive force due to the bonding resin is prevented, the desired high adhesive force is maintained, and the target in the gather portion Desirable functionality is ensured. Further, since the oil agent applied from the outside as in the past is minimized, oil agent mist is not generated in the manufacturing process, and contamination of the manufacturing apparatus by the oil agent is prevented.

  In the method for producing a composite laminate according to the present invention, as described above, the anti-sticking agent contains at least one selected from cellulose ester, calcium stearate, magnesium stearate, and organic stearate. It is preferable to use an anti-sticking agent. Of these, the cellulose ester is preferably composed of an acid containing an organic acid having 2 to 22 carbon atoms and a compound derived from cellulose.

  As described above, according to the composite laminate and the manufacturing method thereof according to the present invention, it is possible to obtain a composite laminate that achieves both functionality and appearance aesthetics in a gathered portion required for advanced paper diaper products and clothing. In particular, a conventional elastic fiber that can be stably unwound, that is, an elastic fiber containing a specific amount of an anti-sticking agent, is used while minimizing the use of an oil agent applied to the elastic fiber from the outside as in the past. As a result, it is possible to obtain a composite laminate having a high adhesive force due to the adhesive resin and excellent uniformity of wrinkles in the gathered portion while preventing contamination of the apparatus.

It is a schematic block diagram of the manufacturing apparatus of the composite laminated body used for implementation of the method which concerns on one embodiment of this invention. It is the external appearance photograph which image | photographed an example of the test piece of the composite laminated body which concerns on this invention from the substantially planar direction. It is the external appearance photograph which image | photographed the test piece of the composite laminated body of FIG. 2 from the substantially cross-sectional direction, A shows the thickness in the location where resin and elastic fiber which extend in one direction cross | intersect, and B extends in one direction The measurement location of the maximum value of the thickness between the locations where the resin and the elastic fiber intersect is shown. FIG. 3 is an external view photograph taken from a substantially planar direction showing a state in the middle of extension when the test piece of the composite laminate of FIG. 2 is manually extended in the extending direction of the elastic fiber. FIG. 5 is an appearance photograph taken from a substantially planar direction showing a state in which the test piece of the composite laminate of FIG. 4 is extended to the maximum in the same direction.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 shows a schematic configuration of an apparatus for producing a composite laminate used for carrying out a method according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a polyurethane elastic yarn 1 as an elastic fiber in the present invention, and the polyurethane elastic yarn 1 as an elastic fiber contains 0.1 to 10% by mass of an anti-sticking agent. As described above, the inhibitor preferably contains at least one selected from cellulose ester, calcium stearate, magnesium stearate, and organic stearate. Among these, the cellulose ester is preferably composed of an acid containing an organic acid having 2 to 22 carbon atoms and a compound derived from cellulose.

  The polyurethane elastic yarn 1 constitutes a yarn feeding roller on the upstream side in the yarn feeding direction among at least two yarn feeding rollers shown in the drawing, and is driven at a predetermined constant speed whose speed (circumferential speed) is set in advance. The yarn is fed downstream from the polyurethane elastic bobbin 2 as the elastic fiber bobbin while being unwound and unwound by the constant speed roller 3. In FIG. 1, for ease of explanation, the supply state of one polyurethane elastic yarn 1 is shown. However, actually, a plurality of polyurethane elastic yarns 1 are arranged in parallel (for example, on the paper surface of the figure). Are fed in one direction (in the direction of the arrow).

  Since the polyurethane elastic yarn 1 that is unwound from the polyurethane elastic bobbin 2 contains a predetermined amount of the anti-sticking agent as described above, the use of an externally applied oil agent is minimized. On the other hand, the polyurethane elastic yarn 1 is stably unwound from the polyurethane elastic bobbin 2 without causing the polyurethane elastic yarns 1 to stick together. As a result, when the yarn is fed between the two fabrics as described below, the form of the polyurethane elastic yarn 1 itself interposed between the two pieces of fabric and the joining form of the polyurethane elastic yarn 1 and the two pieces of fabric Can be stably maintained in a desired desired state, and the uniformity of wrinkles in the gathered portion to be formed is improved. Moreover, since the oil agent given from the outside like the conventional one is suppressed to the minimum, the decrease in the adhesive force due to the bonding resin is prevented, the desired high adhesive force is maintained, and the target in the gather portion Desirable functionality is ensured. Further, since the oil agent applied from the outside as in the prior art is minimized, the manufacturing apparatus is prevented from being contaminated by the oil agent mist in the manufacturing process.

  The polyurethane elastic yarn 1 fed downstream by the constant speed roller 3 constitutes a yarn feeding roller on the downstream side in the yarn feeding direction among the above-mentioned at least two yarn feeding rollers, and the speed (circumferential speed) is arbitrarily set. The yarn is taken up by a controllable variable speed roller 4 and fed further downstream. The speed control of the variable speed roller 4 controls the draft (yarn elongation ratio) applied to the polyurethane elastic yarn 1 between the two yarn feed rollers, that is, between the constant speed roller 3 and the variable speed roller 4. Further, the draft of the polyurethane elastic yarn 1 immediately before being inserted between the nip rollers 6 is controlled to the target draft by controlling the driving speed of a nip roller 6 described later disposed on the downstream side. In order to control or monitor the draft of the polyurethane elastic yarn 1 immediately before being inserted between the nip rollers 6 with the tension corresponding to the draft, the tension of the polyurethane elastic yarn 1 is arranged upstream of the nip roller 6 in the yarn feeding direction. The tension sensor 5 for detecting the tension is provided, and is controlled so that the tension of the polyurethane elastic yarn 1 becomes the target tension. The tension of the polyurethane elastic yarn 1 at the stage where it is removed from the polyurethane elastic bobbin 2 by the constant speed roller 3 changes as the diameter of the polyurethane elastic bobbin 2 changes. Is absorbed once by the operation of pulling out and feeding out the polyurethane elastic yarn 1 by the constant speed roller 3, and the tension (or draft) of the polyurethane elastic yarn 1 just before being inserted between the nip rollers 6 is variable from the constant speed roller 3. The tension is determined by a draft between the roller 4 and the nip roller 6, and the tension is controlled to a target tension which is not changed or extremely small even if there is a change by feedback of a detection signal from the tension sensor 5. It has become.

  The polyurethane elastic yarn 1 accurately controlled to the target tension (that is, stretched to a predetermined draft) is fed between the two upper and lower fabrics 8 drawn by the nip roller 6 from the upper and lower fabric rolls 7 in the drawing. Is done. At this time, for example, an adhesive resin such as a hot melt adhesive is intermittently applied in parallel to the nip inner surface side of one fabric by a coating roller 9 called a design roller, for example, and the adhesive resin is applied. The polyurethane elastic yarn 1 is intermittently joined to the two fabrics 8 at a predetermined interval, thereby forming a composite laminate 10 having stretchability. In this composite laminate 10, the polyurethane elastic yarn 1 is not joined with the adhesive resin and is separated from each fabric 8 in the section that is not joined with the adhesive resin, so that it can be stretched and bent in that section. As a result, the function as a gather member can be exhibited. Through these series of steps, even if elastic fibers with fineness are used, the composite laminate according to the present invention can maintain regular (highly uniform) wrinkles in the gathered portion and is excellent in appearance aesthetics. The body can be provided.

  Here, first, the form of the composite laminate obtained by the present invention will be described. FIG. 2 illustrates an appearance photograph taken from a substantially planar direction of a typical example of a composite laminate test piece manufactured according to the present invention. FIG. 3 shows an external appearance photograph of the test specimen of the composite laminate of FIG. 2 taken from a substantially cross-sectional direction, and A in the figure shows the thickness at the point where the resin extending in one direction and the elastic fiber intersect. , B indicates the measurement location of the maximum value of the thickness between the locations where the resin extending in one direction and the elastic fiber intersect. FIG. 4 illustrates an appearance photograph taken from a substantially planar direction, showing a state in the middle of extension when the test piece of the composite laminate of FIG. 2 is manually extended in the extending direction of the elastic fiber. FIG. 5 illustrates an appearance photograph taken from a substantially planar direction, showing a state in which the test piece of the composite laminate of FIG. 4 is extended to the maximum in the same direction.

  In the composite laminated body of this invention, it has the elastic fiber which consists of the polyurethane elastic yarn which was arrange | positioned in parallel in one direction between two fabrics, for example as mentioned above. The elastic fibers are arranged in a linear shape or a curved shape or a combination thereof, and are sandwiched between fabrics.

  In the composite laminated body of this invention, it has resin extended in one direction arranged in multiple numbers in the direction which cross | intersects an elastic fiber. That is, the resin is arranged in a direction that intersects the direction in which the elastic fiber is inserted. This resin is a resin for bonding two pieces of fabric to elastic fibers, and is a bonding resin that is accurately applied to a predetermined region in a predetermined direction by a so-called design coat. Alternatively, a bonding resin generated from the fabric itself or the elastic fiber itself (in particular, the fabric itself) by ultrasonic waves or heating may be used. The two fabrics and the elastic fiber are separated from each other between the portions where the adjacent resin and the elastic fiber intersect in the longitudinal direction of the elastic fiber. In the above, extending in one direction means that the resin is linear and is disposed in one direction as a whole. As the linear form, any of a linear form, a curved form, or a combination thereof can be adopted. Arranging in one direction as a whole means arranging such a linear form within a range of parallel lines within a width of 10 mm, and the direction in one direction is the direction of such virtual parallel lines. The direction. The angle at which the elastic fiber and the resin extending in one direction intersect is not particularly limited, but is preferably within a range of 90 ± 20 °, more preferably within a range of 90 ± 10 °, and more preferably 90 ± 5 °. It is more preferable if it is within the range of

  In the composite laminate in the present invention, each fabric and the elastic fiber are separated from each other between the elastic fiber and the resin extending in one direction adjacent to each other in the longitudinal direction of the elastic fiber.

  The thickness between the resin and the elastic fiber extending in one direction is preferably 0.1 mm or more and 2.0 mm or less, and more preferably 0.2 mm or more and 2.0 mm or less. When smaller than 0.1 mm, the presence of elastic fibers in the composite laminate may be visually determined, and when the composite laminate is stretched, the presence of elastic fibers can be more significantly determined. The appearance and aesthetics of the composite laminate may be reduced. If it is larger than 2.0 mm, the formed heel may tend to bend, and the fit when worn and the feel of the heel with smooth and regularity may be unsatisfactory.

  And between the said places adjacent to the longitudinal direction of an elastic fiber, it is preferable that the maximum value of the thickness is 1 mm or more and 20 mm or less, More preferably, it is 2 mm or more and 10 mm or less. If it is smaller than 1 mm, the presence of elastic fibers in the stretched composite laminate may be clearly discernable visually, and if the composite laminate is stretched, the presence of elastic fibers can be discriminated more significantly. The appearance and aesthetics of the composite laminate may be deteriorated. If it is larger than 20 mm, the formed heel may tend to bend, and the fit when worn and the feel of the heel with smooth and regularity may be unsatisfactory.

  The width of the resin extending in one direction is preferably 0.2 mm or more and 10 mm or less at the maximum extension, and more preferably 0.4 mm or more and 6 mm or less. If it is smaller than 0.2 mm, the elastic fibers in the composite laminate are easy to move, and when the expansion and contraction are repeated, the uniformity of wrinkles is reduced, or adjacent elastic fibers are close to each other, and the presence can be visually determined. In some cases, the appearance and aesthetics of the composite laminate may be reduced. When the thickness is larger than 10 mm, the presence of elastic fibers may be noticeable in a streak shape or a stripe shape when the composite laminate is viewed with transmitted light. Further, the elongation of the composite laminate may be reduced, and the placement size may be increased, or the fit when worn and the smooth and regular feel of the heel may be unsatisfactory.

  And it is preferable that the space | interval of the resin extended to one direction is 1 mm or more and 20 mm or less at the time of the largest expansion | extension of a composite laminated body, More preferably, it is 2 mm or more and 15 mm or less. The interval between the resins extending in one direction refers to the distance between the centers of the resins extending in one direction. When such an interval is smaller than 1 mm, the case where the presence of elastic fibers in the composite laminate can be clearly discerned appears, and when the composite laminate is stretched, it is more prominent. Aesthetics may be reduced. If it is larger than 20 mm, the formed heel may be easily cramped, and the fit of the garment when worn and the feel of a smooth and well-ordered heel may be unsatisfactory.

The fabric used in the composite laminate of the present invention is preferably a woven fabric, a knitted fabric, a non-woven fabric, etc., and a particularly preferable fabric is a non-woven fabric, a wet non-woven fabric manufacturing method such as a papermaking method, a resin bond method, a thermal bond method, a needle punch method. , Any of those obtained by a dry nonwoven fabric manufacturing method such as a spunbond method, a spunlace method, a melt blow method and a flash spinning method, and may be a single layer or a plurality of laminates. Good. Moreover, 10-20 g / m < ² > or less of the fabric weight of a nonwoven fabric is preferable, More preferably, it is 12-18 g / m < ² >.

  The material of the fibers constituting the fabric is not particularly limited, but polyester, polyamide, polyacrylonitrile, polypropylene, polyethylene, copolymers of various α-olefins such as propylene and ethylene, synthetic fibers such as polyurethane, regenerated fibers such as rayon and acetate, Semi-synthetic fibers, natural fibers such as wool and cotton are preferred.

  The form of the fibers constituting the fabric may be either long fiber filaments or short fiber spun yarns. Two or more types of fibers may be mixed or mixed, crimped, or other composites Fibers can be selected widely.

The composite laminate in the present invention is one in which elastic fibers are used at least in part.
The elastic fiber used in the present invention is a polyurethane elastic fiber, a polyether ester elastic fiber, a polyamide elastic fiber, or a so-called rubber thread made of natural rubber, synthetic rubber or semi-synthetic rubber, and an elastomer. Those obtained by cutting the film into fibers, or fibers obtained by combining or mixing with other organic synthetic resin bodies mainly composed of these, crimped fibers, etc. can be adopted, and the fibers themselves have enthalpy elasticity. preferable. From the viewpoint of better exhibiting stretchability as a composite laminate, the most preferred is a polyurethane elastic fiber (typically, the polyurethane elastic yarn as described above).

  The elastic fiber used in the composite laminate of the present invention may be a bare yarn or may be covered (covered) with other elastic fibers or non-elastic fibers. From the viewpoint of stretchability, the bare laminate is most preferable as the composite laminate.

  The polyurethane elastic fiber is a polyester mainly composed of a long-chain diol such as a copolyesterdiol as a soft segment, a diisocyanate such as diphenylmethane-4,4 diisocyanate as a hard segment, and a bifunctional hydrogen compound as a chain extender. Polyether methylene glycol having a polytetramethylene ether glycol as a soft segment, diphenylmethane-4,4 diisocyanate as a hard segment, and a low molecular weight difunctional hydrogen compound as a chain extender is preferred as a main component.

  In addition, the polyether / ester-based elastic fiber is preferably composed mainly of polytetramethylene ether glycol as a soft segment and polybutyl terephthalate or polybutyl isophthalate as a hard segment.

  In the present invention, from the viewpoint of imparting desired stretchability to the final product, it is preferable to use polyurethane elastic fibers as described above.

  The polyurethane polymer used in the polyurethane elastic fiber that can be used in the present invention is a soft segment, an isocyanate, and a chain extender, each having a long-chain polyether segment, a polyester segment, or a polyether ester segment as main components. It is preferable to be comprised from the hard segment which uses diamine or diol as a main structural component.

  The raw material constituting the soft segment of such a polyurethane polymer is 1) a polymer or copolymer obtained from tetrahydrofuran, tetramethylene glycol, 3-methyl-1,5-pentanediol, tetrahydrofuran, 3-methyltetrahydrofuran or the like. Some polyether segments, 2) Polyester segments obtained from diols such as ethylene glycol, tetramethylene glycol, 2,2-dimethyl-1,3-propanediol, and dibasic acids such as adipic acid and succinic acid, and 3) poly Polyether ester segments obtained from-(pentane-1,5-carbonate) diol, poly- (hexane-1,6-carbonate) diol, etc. can be used, but among them, polyether obtained from tetramethylene glycol Segment, i.e. polytetramethylene ether glycol (hereinafter, abbreviated as PTMG) are preferred.

  In the elastic fiber used in the composite laminate of the present invention, the polyurethane polymer is obtained by subjecting a prepolymer product obtained by polyaddition reaction of a hydroxyl-terminated soft segment precursor with an organic diisocyanate (capping reaction) to a diamine chain extender or diol. It can be obtained by chain extension with a chain extender. Furthermore, for the purpose of adjusting the thermal softening point, it is also preferable to obtain the prepolymer product by further reacting with an organic diisocyanate and then reacting with a chain extender.

  Examples of the organic diisocyanate used for the polyurethane polymer in the present invention include bis- (p-isocyanatophenyl) -methane (hereinafter abbreviated as MDI), tolylene diisocyanate (TDI), bis- (4-isocyanatocyclohexyl)- Methane (PICM), hexamethylene diisocyanate, 3,3,5-trimethyl-5-methylenecyclohexyl diisocyanate and the like can be used, and MDI is particularly preferable.

  Various diamines such as ethylenediamine, 1,3-cyclohexanediamine, 1,4-cyclohexanediamine and the like are preferably used as diamine chain extenders for forming polyurethaneurea.

  The diamine chain extender is not limited to only one type of diamine, and may be composed of a plurality of types of diamines. A chain terminator can be included in the reaction mixture to help control the final molecular weight of the polyurethaneurea. Usually, a monofunctional compound having active hydrogen as a chain terminator, such as diethylamine, can be used.

  Further, the chain extender is not limited to the diamine, and may be a diol. In particular, it is suitable for obtaining an elastic fiber having a heat softening point of 100 ° C to 180 ° C. For example, ethylene glycol, 1,3-propanediol, 1,4-butanediol, neopentyl glycol, 1,2-propylene glycol, 1,4-cyclohexanedimethanol, 1,4-cyclohexanediol, 1,4-bis (Β-hydroxyethoxy) benzene, bis (β-hydroxyethyl) terephthalate, paraxylylene diol, and the like can be used. The diol chain extender is not limited to only one type of diol, and may be composed of a plurality of types of diols. Moreover, you may use together with the compound containing one hydroxyl group which reacts with an isocyanate group. In this case, various methods such as a melt polymerization method and a solution polymerization method can be adopted as a method for obtaining such a polyurethane, and the method is not limited. The polymerization formulation is not particularly limited, and for example, a method of synthesizing polyurethane by simultaneously reacting a polyol, a diisocyanate, and a chain extender composed of a diol can be employed. It may be a thing.

  Furthermore, it is also preferable to blend a stabilizer, a thermal conductivity improver and a pigment within a range not impairing the effects of the present invention.

  For example, hindered phenol-based drugs such as so-called BHT and Sumitizer (registered trademark) GA-80 manufactured by Sumitomo Chemical Co., Ltd. Trademark) ”and other benzotriazole-based, benzophenone-based agents, phosphorus-based agents, various hindered amine-based agents, fluororesin powders or silicone resin powders based on polyvinylidene fluoride, metal soaps such as magnesium stearate In addition, bactericides and deodorants containing silver, zinc, and these compounds, as well as various lubricants such as lubricants such as silicone and mineral oil, barium sulfate, cerium oxide, betaine, phosphate compounds, and phosphate ester compounds An inhibitor or the like may be added, or may exist by reacting with the polymer. In particular, in order to further enhance the durability to light and various nitric oxides, a nitric oxide scavenger, for example, HN-150 manufactured by Nippon Hydrazine Co., “Hostanox (registered trademark)” SE10 manufactured by Clariant Corporation, etc. It is preferable to contain a thermal oxidation stabilizer.

  In order to promote melting and thermal softening, it is preferable to contain, for example, alumina, boron nitride, aluminum nitride, silica, silicon nitride, magnesium oxide, magnesium carbonate, silicon carbide or the like as a thermal conductivity improver.

  For example, the pigment preferably contains titanium oxide, zinc oxide, zirconium phosphate or the like. Among these, titanium oxide is preferred from the viewpoint of suppressing the glare caused by peeling of the elastic fibers and obtaining a composite laminate having a homogeneous appearance in which the elastic fibers are not noticeable. As long as it is titanium oxide, either a rutile type or an anatase type is preferably used. Further, from the viewpoint of suppressing reflection of light and stably producing a polyurethane elastic yarn, it is preferable that the average primary particle diameter is in the range of 0.15 μm to 0.3 μm. The content in the polyurethane elastic fiber is preferably 0.3% by mass or more from the viewpoint of preventing glare, and from the viewpoint of stably spinning the polyurethane elastic fiber to prevent clogging of the die. It is preferable that it is 3 mass% or less.

  In order to promote melting and thermal softening, it is preferable to contain, for example, alumina, boron nitride, aluminum nitride, silica, silicon nitride, magnesium oxide, magnesium carbonate, silicon carbide or the like as a thermal conductivity improver.

  N, N-dimethylacetamide (hereinafter abbreviated as DMAc), dimethylformamide, dimethyl sulfoxide, N-methylpyrrolidone and the like can be used as a solvent when the polyurethane polymer is used as a solution. It is the most commonly used solvent.

  The solution concentration of the polyurethane polymer is preferably a dry spinning method for obtaining filament yarns of polyurethane elastic fibers at a solution concentration of 30 to 50% by mass (based on the total mass of the solution).

  In the present invention, the method for spinning polyurethane-based elastic fibers from a polyurethane polymer is not particularly limited. For example, 1) As a spinning method for polyurethane-based elastic fibers using diol as a chain extender, melt spinning is used. A method, a dry spinning method or a wet spinning method can be employed. 2) As a spinning method for polyurethane-based elastic fibers using diamine as a chain extender, a normal dry spinning method can be employed.

  In the present invention, the use of a filament yarn of polyurethane-based elastic fiber is suitable from the viewpoint of high stretchability, particularly stretch recovery stress, but the elastic fiber itself tends to be noticeable. Therefore, the following fiber specifications and combinations are preferable.

  The fineness of the fibers and elastic fibers constituting the fabric can be appropriately selected according to the intended use, but is preferably in the range of 0.1 to 5000 dtex.

  The fineness of the fabric constituting the composite laminate in the present invention represents the maximum fineness of the fibers distributed on the fabric surface.

  The fineness of the fibers constituting the fabric is more preferably from 0.1 to 500 dtex, more preferably from 0.1 to 50 dtex, and most preferably from 0.3 to 30 dtex from the viewpoint of highly uniform wrinkle formation. It is. And from a viewpoint of the touch in a composite laminated body, Preferably, it is 0.2-5 dtex, Most preferably, it is 0.2-2.0 dtex.

  Moreover, as a fineness of an elastic fiber, 1-3000 dtex is preferable, More preferably, it is 10-350 dtex.

  When an elastic fiber having an elastic fiber fineness of less than 1 dtex is used, there is a tendency that the elastic fiber cannot withstand running friction at the time of production, and yarn breakage tends to occur, and when an elastic fiber exceeding 3000 dtex is used. During manufacturing, the sensor side tends to be damaged without being able to withstand running friction.

  In the composite laminate of the present invention, the ratio of the fineness of the elastic fiber to the maximum fineness of the fiber distributed on the fabric surface is preferably 0.5 or more and 300 or less from the viewpoint of appearance quality. More preferably, it is 0.5 or more and 200 or less.

  In order to obtain a composite laminate in which the presence of elastic fibers in the composite laminate is difficult to distinguish, i.e., a homogeneous laminate with inconspicuous elastic fibers, the influence of surface reflected light is more dominant than transmitted light. The maximum fineness of the fibers distributed in the fiber and the fineness ratio between the elastic fibers are important.

  If the ratio of the fineness of the elastic fiber to the maximum fineness of the fiber distributed on the fabric surface exceeds 300, the presence of the elastic fiber is noticeable and the appearance quality is impaired.

  When the ratio of the fineness of the elastic fiber to the maximum fineness of the fiber distributed on the fabric surface is 0.5 or more and 300 or less, the presence of the elastic fiber cannot be easily recognized visually, and the appearance quality is particularly excellent.

  This effect is more prominent when the maximum fineness of the fiber distributed on the fabric surface is in the range of 0.2 to 2.2 dtex, and more prominent is 0.5 to 2.0 dtex. If the ratio of the fineness of the elastic fiber to the maximum fineness of the fiber distributed on the fabric surface is greater than 300, the presence of the elastic fiber in the composite laminate may be clearly visually discernible. It becomes easier to discriminate visually, and the appearance and aesthetics of the composite laminate are deteriorated. More preferably, it is 0.5 or more and 160 or less. If it is less than 0.5, the elasticity of the elastic fiber is substantially insufficient, wrinkles are hardly formed, and stretchability is not exhibited.

Furthermore, in the method according to the present invention, in order to obtain a composite laminate 10 having a homogeneous appearance in which elastic fibers are not visible or inconspicuous, the color difference variation ΔE ^* v defined as follows is equal to or less than a specific value (1 0.0 or less). The color difference variation ΔE ^* v is a value calculated from an L ^* value, an a ^* value, and a b ^* value in a Lab color system using a non-contact type spectrocolorimeter, which will be described later. The L ^* value in the Lab color system is an index representing lightness, the a ^* value is a position between red and green, and the b ^* value is an index representing a position between yellow and blue. As the color difference variation ΔE ^* v is larger, the change in the color difference at the intersection with the elastic fiber is larger. Therefore, it is easier to see the elastic fiber and to confirm the presence of the elastic fiber in appearance. When the color difference variation ΔE ^* v is 1.0 or less, the elastic fiber cannot be seen or the presence of the elastic fiber cannot be confirmed, or the elastic fiber is very difficult to see or its existence is very difficult to confirm. The required characteristics will be met.

  In the present invention, the elastic fiber may be an original yarn, and it is also preferable to use a fabric or a fiber constituting the fabric that is colored in advance. Although it does not specifically limit about the coloring method of a fabric and the fiber which comprises it, From the viewpoint of coloring with the same color as an elastic fiber, it is also preferable to color by cheese dyeing etc. which can adjust a color.

  Preferred as the elastic fiber used in the present invention is that there is no practical problem, including process passability, and excellent shape at the point where the elastic fiber and the resin extending in one direction intersect. From the viewpoint of obtaining, those having a thermal softening point in the range of 100 ° C. or higher and 240 ° C. or lower are preferable. When the heat softening point is lower than 100 ° C., the form may be destroyed by heat treatment from a resin extending in one direction at the time of tumbler drying or composite laminate production, such as dyeing process and practical use. If it is higher, the compatibility between the resin extending in one direction and the elastic fiber is low, which may adversely affect the formation of wrinkles. The range of the thermal softening point is more preferably 110 ° C. or higher and 200 ° C. or lower, and most preferably 120 ° C. or higher and 160 ° C. Within this range, a heat roll, an ultrasonic welder, a high frequency welder, an electromagnetic induction welder, or a composite welder thereof, which is a well-known method, is used to extend in one direction in which a plurality of them are arranged in a direction crossing the elastic fiber. It is suitable for the resin constituting the elastic fiber and / or the material constituting the fabric to be softened or melted.

  In the fabric used for the composite laminate in the present invention, there are resins extending in one direction arranged in a direction intersecting with the elastic fibers, and the resins are hot melt adhesives, solvent-based adhesives, etc. Various adhesives and elastic fibers and / or materials constituting the fabric are heat-softened or melted.

  When the material constituting the fabric is heat-softened or melted, various known methods such as heat embossing and ultrasonic fusion can be employed.

  It is also preferable that a mechanical entanglement method such as a needle punch or a water jet is added to the resin region extending in one direction.

  Furthermore, a resin preferable as a resin extending in one direction is a resin containing the same kind of material as that of the fabric and elastic fibers in order that the present invention enhances the effect thereof, and more preferably includes a component of the fabric and elastic fibers. preferable. When a resin containing such a fabric or elastic fiber component is used as the resin extending in one direction, it is also preferable to thermally soften or melt the fabric or elastic fiber to form a resin extending in one direction. The most preferable case is when the fabric and the elastic fiber are both heat-softened or melted.

  The composite laminate of the present invention is a composite laminate having elasticity, and is a garment that is in close contact with the skin, specifically underwear, sportswear, diapers for children and adults, sanitary products, masks, and medical wear. It is suitable for use in hygiene materials such as surgical clothes, bandages, supporters, medical materials, etc., and also because of its excellent aesthetics, interior products such as curtains and furniture, bedding, lining, girdles, bras, inti Applications include mate products, clothing waistbands, stretch sportswear, and stretch outerwear.

  Hereinafter, evaluation of the regularity of wrinkles in the present invention will be described with reference to examples. First, a method for measuring and evaluating each characteristic used in the description of the present invention will be described.

[Thermal softening point]
The thermal softening point was measured as one of the heat resistance indicators of elastic fibers. The elastic fiber was measured for temperature dispersion of the dynamic storage elastic modulus E ′ at a heating rate of 10 ° C./min using a dynamic elastic modulus measuring device RSAII manufactured by Rheometric. The thermal softening point was determined from the intersection of the tangent line in the plateau region of the E ′ curve and the tangent line of the E ′ curve where E ′ descends due to thermal softening. Note that E ′ is a logarithmic axis, and temperature is a linear axis.

[Fineness of fabric]
The fibers on the surface of the fabric are observed using a scanning electron microscope, the maximum value (α) of the diameters of 10 randomly selected surface fibers is measured, and the density (ρ) g / m of the substance constituting the fabric ³ was obtained from the following formula.
Fineness (decitex) = ρ × π × (α / 2) ² × 10000

[Fineness of elastic fiber]
In the present invention, the fineness of the elastic fiber is an apparent fineness measured according to ISO2060, and the measurement method is as follows. The sample of the elastic fiber used for the measurement of the apparent fineness is a sample that is allowed to stand for 24 hours in an environment of 20 ° C. and 65% relative humidity. An elastic fiber is cut to a length d (unit: m) under no load, and an apparent fineness (decitex) = yarn mass (g) of length d (m) × 10000 ÷ d is obtained to one decimal place. Here, the length d is usually 0.1 m, but it is not necessary to be a single continuous fiber, and the total length d ′ of the plurality may be 0.1 m. In this case, when a sample of elastic fibers is taken out from the composite laminate, the elastic fibers arranged between the two fabrics may be sampled from a location separated from each fabric. For example, the composite laminate is cut with scissors along a resin extending in one direction and arranged in a direction intersecting the elastic fibers, and the elastic fiber pieces having a good linear shape have a total length. The dimensions are measured with an optical microscope until 0.1 ± 0.01 m, a plurality of elastic fiber pieces are selected, and the total length d ′ is obtained. Next, there is a method in which the total mass of a plurality of elastic fiber pieces selected with a precision balance is measured, and the total mass (g) × 10000 ÷ d ′ of the elastic fiber pieces is calculated to obtain the fineness of the elastic fibers.

[External shape evaluation of composite laminate ridges]
The composite laminate was stretched 20% in the MD direction, fixed at both ends with a length of 30 cm, and allowed to stand for 24 hours in a temperature of 20 ° C. and 65% relative humidity environment. Judgment was made.
《Evaluation of 襞》
A: There are no turbulences in the habit.
A: 1 to 3 wrinkle disturbances.
(Triangle | delta): The disorder | damage | failure of a ridge is 4-10 places.
×: 10 or more wrinkles

[External shape retention of composite laminate ridges]
The composite laminate was kept at a temperature of 35 ° C. and a relative humidity of 85% in a stretched state of 100%, and allowed to stand for 12 hours.

[Equipment of cocoon shape after elongate winding of composite laminate]
The composite laminate was left to stand for 24 hours under a temperature of 23 ° C. and a relative humidity of 65% in a state where the composite laminate was rolled up, and then the composite laminate was unwound from the roll-up state and subjected to the above << Evaluation of wrinkles >>.

[Measure color variation of composite laminate]
The composite laminate to be measured is stretched to the maximum in the stretching direction and fixed, and black on the lining (L ^* = 20 ± 1, a ^* = 0.2 ± 0.2, b ^* = 0.3 ± 0.2) ) Was placed. Using a color master (D25 DP-9000 type signal processor) as a non-contact type spectrocolorimeter, colorimetric diameter φ = 1 mm, L ^* value, a ^* value, b in L * a * b * color system ^* 40 values were measured at intervals of 0.5 mm in the width direction of the composite laminate. From the measurement results, the color difference fluctuation “ΔE ^* v” is set such that the point with the maximum value of L * is L ^* 1, a ^* 1, b ^* 1, and the point with the minimum value is L ^* 2, a ^* 2, b ^* 2. Was obtained from the following formula.
^{ΔE * v = √ [(L} * 1-L * 2) 2 + (a * 1-a * 2) 2 + (b * 1-b * 2) 2]

[Fit: Dispersion of tightening force of disposable diapers]
A sensory evaluation was performed in which ten judgment persons pressed the skin to observe whether the laminate used in the gathered part of the paper diaper felt that it was difficult for human skin to enter. The judgment results are displayed in the following categories.
A: Eight or more people felt that it was difficult to bite in.
○: Fewer than 8 people and 6 or more people felt difficult to bite.
Δ: Fewer than 6 and 4 or more felt that biting was difficult.
X: Fewer than 4 people felt that biting was difficult.

[Examples 1-6, Comparative Examples 1-6]
Using the apparatus shown in FIG. 1, polyurethane elastic yarns containing anti-sticking agents (Examples and Comparative Example 3) shown in Table 1 and polyurethane elastic yarns containing no anti-sticking agents (remaining comparative examples) were used as polyurethane elastic bobbins. Remove the warp from the thread, set the draft between the constant speed roller and nip roller (draft when inserted into the nip roller) to the value shown in Table 1, and adjust the speed while feeding back the tension detected by the tension sensor. The variable speed roller was controlled so that the tension of the polyurethane elastic yarn between the roller and the nip roller was controlled to the target tension, and the polyurethane elastic yarn was fed between the two fabrics. On the inner surface of the nip of one fabric, a hot melt adhesive resin is intermittently applied in parallel with a coating roller called a design roller, or the fabric or / and polyurethane elastic yarn itself by an ultrasonic welder. The adhesive resin is intermittently generated in parallel to extend in parallel, and the polyurethane elastic yarn is intermittently joined to the two fabrics at predetermined intervals via the adhesive resin. Under the conditions shown, a composite laminate having wrinkles and stretchability was produced, and each characteristic of the produced composite laminate was evaluated. The results shown in Table 1 were obtained.

  In each Example that satisfies the requirements defined in the present invention, good evaluation results were obtained, but in each Comparative Example that did not satisfy any of the requirements defined in the present invention, good evaluation results were not obtained. It was.

  A polyurethane solution (pu1, pu2) of the following polymer species was prepared, and a spinning solution was prepared as follows using the polyurethane solution. The spinning solution was spun and the composition and specifications shown in Table 1 were satisfied. A polyurethane elastic yarn (elastic fiber) was produced, and the produced polyurethane elastic yarn was used for producing a composite laminate.

Manufacturing conditions other than those shown in Table 1 are as follows.
Fabrics of Examples 1 to 5 and Comparative Examples 1 to 6: PP (polypropylene) spunbond, basis weight 17 g / m ²
Fabric of Example 6: PP spunbond containing 0.3% by mass of ethylenebisstearic acid amide, basis weight 17 g / m ²
Hot melt adhesive used for design coat: Rubber hot melt adhesive Hot melt adhesive Application amount: 20 g / m ²
Hot melt adhesive application temperature: 155 ° C
Peripheral speed of constant speed roller: 100m / min

pu1:
MDI was charged to 1.9 mol per mol of PTMG having a number average molecular weight of 2000, and reacted at 70 ° C., and the resulting reaction product was sufficiently stirred in N, N-dimethylacetamide (DMAc). And dissolved to obtain a solution. Next, 0.5 mol of MDI is added with respect to 1 mol of PTMG having a number average molecular weight of 2000, and the mixture is sufficiently stirred. Then, a DMAc solution containing 1,4-butanediol as a chain extender is added and stirred sufficiently. Further, a DMAc solution containing butanol as an end-capping agent was added to prepare a polyurethane solution pu1 having a polymer solid content of 35% by mass. The resulting solution had a viscosity of about 3500 poise at 40 ° C. The polymer had an intrinsic viscosity of 0.90 when measured in DMAc at a solution concentration of 0.5 g / 100 ml in a 25 ° C. environment.

A1:
Next, as an antioxidant, a polyurethane solution (“METACROL (registered trademark)” 2462D manufactured by DuPont) formed by a reaction of t-butyldiethanolamine and methylene-bis- (4-cyclohexyl isocyanate), An alternating polymer of p-cresol and divinylbenzene (“METACROL (registered trademark)” 2390D manufactured by DuPont) was mixed at a mass ratio of 2: 1, and an antioxidant DMAc solution (concentration 35% by mass) was mixed. Then, 96 parts by mass of the polyurethane solution pu1 and 4 parts by mass of the antioxidant solution were mixed to obtain a polymer solution (A1).

B1:
Next, as a white pigment, titanium oxide “TIPAQUE (registered trademark)” PF-711 manufactured by Ishihara Sangyo Co., Ltd. was dispersed in DMAc to prepare a 35 mass% DMAc dispersion (B1).

C1:
Next, a 35 mass% DMAc solution (C1) of cellulose ester (main component cellulose acetate butyrate, thermal softening point 135 ° C.) manufactured by Eastman Chemical Co. was prepared as an anti-sticking agent.

P1:
Next, in Examples 1 and 2, A1, B1, and C1 as a spinning solution were mixed at a mass ratio of 97.9: 0.1: 2.0 to obtain a spinning solution (P1).

Q1:
In Comparative Example 1, Comparative Example 2, Comparative Example 4, and Comparative Example 5, A1 and B1 were mixed as a spinning solution at a mass ratio of 99.9: 0.1 to obtain a spinning solution (Q1).

D3:
In Comparative Example 3, a 35 mass% DMAc solution (D3) of cellulose ester (main component cellulose acetate propionate, thermal softening point 150 ° C.) manufactured by Eastman Chemical Co. was prepared as an anti-sticking agent.

Q3:
In Comparative Example 3, A1, B1, and D3 were mixed as a spinning solution at a mass ratio of 97.9: 0.1: 2.0 to obtain a spinning solution (Q3).

C3:
As an anti-sticking agent, a 35 mass% DMAc dispersion slurry (C3) containing magnesium stearate and ethoxypolyethylene glycol stearate in a ratio of 5: 3 was prepared.

P3:
In Example 3, A1, B1, and C3 as a spinning solution were mixed at a mass ratio of 99.1: 0.1: 0.8 to obtain a spinning solution (P3).

pu2:
MDI was charged to 1.6 mol per mol of PTMG having a number average molecular weight of 2000, and reacted at 70 ° C., and the resulting reaction product was sufficiently stirred and dissolved in DMAc to obtain a solution. . Next, a DMAc solution containing ethylenediamine as a chain extender is added, and the mixture is sufficiently stirred. Further, a DMAc solution containing cyclohexylamine as an end-capping agent is added, and a polyurethane solution pu2 having a polymer solid content of 35% by mass is added. Was prepared. The resulting solution had a viscosity of about 3000 poise at 40 ° C. The polymer had an intrinsic viscosity of 0.95 as measured in DMAc at a solution concentration of 0.5 g / 100 ml in a 25 ° C. environment.

A2:
Next, as an antioxidant, a polyurethane solution (“METACROL (registered trademark)” 2462D manufactured by DuPont) formed by a reaction of t-butyldiethanolamine and methylene-bis- (4-cyclohexyl isocyanate), An alternating polymer of p-cresol and divinylbenzene (“METACROL (registered trademark)” 2390D manufactured by DuPont) was mixed at a mass ratio of 2: 1, and an antioxidant DMAc solution (concentration 35% by mass) was mixed. After adjusting, 96 parts by mass of the polyurethane solution pu2 and 4 parts by mass of the antioxidant solution were mixed to obtain a polymer solution (A2).

B2:
Next, as a white pigment, titanium oxide “TIPAQUE (registered trademark)” PF-711 manufactured by Ishihara Sangyo Co., Ltd. and anhydrous magnesium carbonate “magseeds (registered trademark)” manufactured by Kamishima Chemical Industry Co., Ltd. in a mass ratio of 1: 1. Dispersed in DMAc to prepare a 35 mass% DMAc dispersion (B2).

C4:
Next, in Example 4, a DMAc dispersion slurry (C4) having a concentration of 35% by mass of ethylenebisstearic acid amide was prepared as an anti-sticking agent.

P4:
Next, A2, B2, and C4 as a spinning solution of Example 4 were mixed at a mass ratio of 99.0: 0.5: 0.5 to obtain a spinning solution (P4).

P5:
Next, A2, B2, C1 used in Example 1, and C4 used in Example 4 were mixed at a mass ratio of 97.2: 0.5: 2.0: 0.3 as the spinning solution of Example 5. And a spinning solution (P5) was obtained.

P6:
Next, A2 and B2 as the spinning solution of Example 6 and C4 used in Example 4 were mixed at a mass ratio of 98.7: 0.5: 0.8 to obtain a spinning solution (P6).

Q6:
In Comparative Example 6, A2 and B2 were mixed at a mass ratio of 99.5: 0.5 as a spinning solution to obtain a spinning solution (Q6).

  The spinning solutions P1, P3 to P6, Q1, Q3, and Q6 are discharged from the spinneret into a high-temperature (350 ° C.) inert gas (nitrogen gas) as a multifilament and passed through a high-temperature gas atmosphere. The polyurethane elastic yarn shown in Table 1 was produced by drying and passing through an air jet type twist fiber machine so that the fibers in the middle of drying were twisted together, fusing the filaments and winding them at a speed of 500 m / min. The heat softening point of the polyurethane elastic yarn of Example 1 was 144 ° C., and the heat softening point of the polyurethane elastic yarn of Example 4 was 225 ° C.

  The composite laminate according to the present invention can be applied to any composite laminate that is required to have a stretchable gathered portion, and is suitable for underwear, sportswear, or hygiene items such as diapers for children and adults, sanitary products, etc. It is suitable for applications such as materials.

DESCRIPTION OF SYMBOLS 1 Polyurethane elastic thread 2 Polyurethane elastic thread wound body 3 Constant speed roller 4 Variable speed roller 5 Tension sensor 6 Nip roller 7 Fabric wound body 8 Fabric 9 Application roller 10 Composite laminated body

Claims (14)

Between two fabrics,
A plurality of elastic fibers arranged in parallel in one direction;
A composite laminate comprising a plurality of the fabrics arranged side by side in one direction intersecting with the elastic fibers and a resin that joins the elastic fibers and the elastic fibers,
The two fabrics and the elastic fibers are spaced apart from each other where the elastic fibers intersect in the longitudinal direction of the elastic fibers,
The ratio of the fineness of the elastic fiber to the fineness of the fiber constituting the fabric is 0.5 or more and 300 or less, and the elastic fiber contains 0.1 to 10% by mass of an anti-sticking agent. Composite laminate.   The composite laminate according to claim 1, wherein the anti-sticking agent contains at least one of cellulose ester, calcium stearate, magnesium stearate, and organic stearate.   The composite laminate according to claim 2, wherein the cellulose ester comprises an acid containing an organic acid having 2 to 22 carbon atoms and a compound derived from cellulose. When measuring the color of the outer surface of the fabric from the outside of the composite laminate in a direction intersecting with the elastic fibers with the spectrocolorimeter in a state where the composite laminate is extended to the maximum in the extending direction of the elastic fibers, L ^{* L *} value value at the point showing the maximum value, ^{a *} value, ^{b *} value ^{(L * 1, a * 1} , b * 1) and ^{L * L} value at the point showing the minimum value ^* value, a ^The color difference variation ΔE ^* v defined by the following formula using the ^* value and the b ^* value (L ^* 2, a ^* 2, b ^* 2) is 1.0 or less. The composite laminate described.
^{ΔE * v = √ [(L} * 1-L * 2) 2 + (a * 1-a * 2) 2 + (b * 1-b * 2) 2]   The composite laminated body in any one of Claims 1-4 whose fineness of the said elastic fiber is 10-300 dtex.   The composite laminate according to claim 1, wherein a thickness of the composite laminate at a location where the resin extending in one direction and the elastic fiber intersect is 0.1 mm or more and 2.0 mm or less.   The maximum value of the thickness of the composite laminate between the elastic fiber adjacent to the longitudinal direction of the elastic fiber and the elastic fiber intersecting with the elastic fiber is 1 mm or more and 20 mm or less. A composite laminate according to any one of the above.   The width | variety per one of the said resin extended in one direction in the state extended | stretched to the extension direction of the said elastic fiber to the maximum in the composite laminated body is 0.2 mm or more and 10 mm or less. The composite laminated body in any one.   The composite according to any one of claims 1 to 8, wherein an interval of the resin extending in one direction is 1 mm or more and 20 mm or less in a state in which the composite laminate is extended to the maximum in the extending direction of the elastic fiber. Laminated body.   The composite laminated body in any one of Claims 1-9 whose heat softening point of the said elastic fiber is 100 degreeC or more and 240 degrees C or less.   The composite laminate according to any one of claims 1 to 10, wherein the resin extending in one direction contains the same component as the constituent component of the fabric and / or the elastic fiber. Between two fabrics,
Supply multiple elastic fibers in parallel in one direction,
Supplying a plurality of resins that join the two fabrics and the elastic fibers in parallel in one direction intersecting the elastic fibers;
In producing a composite laminate in which the two fibers and the elastic fibers are separated from each other between the elastic fibers and the resin adjacent in the longitudinal direction of the elastic fibers,
The ratio of the fineness of the elastic fiber to the fineness of the fiber constituting the fabric is 0.5 to 300,
A method for producing a composite laminate, wherein an elastic fiber containing 0.1 to 10% by mass of an anti-sticking agent is used as the elastic fiber.   The method for producing a composite laminate according to claim 12, wherein an anti-sticking agent containing at least one of cellulose ester, calcium stearate, magnesium stearate, and organic stearate is used as the anti-sticking agent.   The method for producing a composite laminate according to claim 13, wherein the cellulose ester comprises an acid containing an organic acid having 2 to 22 carbon atoms and a compound derived from cellulose.