WO2019146573A1

WO2019146573A1 - Stretchable fiber sheet and method for manufacturing stretchable fiber sheet

Info

Publication number: WO2019146573A1
Application number: PCT/JP2019/001786
Authority: WO
Inventors: 山田菊夫
Original assignee: 山田菊夫
Priority date: 2018-01-23
Filing date: 2019-01-22
Publication date: 2019-08-01

Abstract

The present invention provides a stretchable fiber sheet in which the quality of external appearance is improved in a state in which an elastic member is contracted, and a method for manufacturing the stretchable fiber sheet. A stretchable fiber sheet 1 comprises a fiber sheet 2 on which a repeated pattern 3 is applied by repeatedly disposing a pattern unit 4 formed in a prescribed shape, and an elastic member 5 joined to the fiber sheet 2. The repeated pattern 3 is divided, in a plan view of the fiber sheet 2, into a visible part 34 configured from a portion visible from the outside when the elastic member 5 is contracted, and a non-visible part 35 configured from a portion outside the visible part 34. A pleated structure 60 is formed in the fiber sheet 2 so that the proportion of the non-visible part 35 in the repeating pattern 3 increases as the stretching ratio of the elastic member 5 increases.

Description

Stretchable fiber sheet and method for producing the same

The present invention relates to an elastic fiber sheet and a method for producing the elastic fiber sheet.

The stretchable fiber sheet is used, for example, as a fabric for textiles such as diapers, sanitary goods, underwear for temporary use for travel, disaster prevention, outdoor, and welfare, clothing, bedding, etc. There is. Such a fabric is required to have a good balance between the function of the fiber product and the appearance.

When the textile product is, for example, a diaper, a sanitary product or an underwear, good functions include good fit with the body, good sense of contact when in contact with the skin, good breathability, and absorption of sweat. Good moisture transpiration ability to be dried is required. In particular, the softness | flexibility etc. of fabric itself are calculated | required by the fabric for disposable fiber products which touch human skin directly.

In the case where the fiber product is a diaper, non-woven sheets and paper are widely used as the diaper fabric. Therefore, even when a non-woven fabric sheet or paper is used as the fabric, the fabric is required to have a fit as well as breathability.

In this respect, as a fabric for a textile product, the first and second fibrous sheets having breathability and the fibrous material having liquid diffusibility interposed between the first and second fibrous sheets are included. In addition, a sheet composed of a laminated sheet formed by laminating the first and second fibrous sheets and the fiber material together with an elastic member has been proposed (for example, Patent Document 1). The fabric is a stretchable fiber sheet having stretchability by an elastic member, and the ridge portion is formed by the contraction of the elastic material.

Patent No. 6072992

The stretchable fiber sheet, which is a fabric for fiber products of Patent Document 1, is capable of obtaining a fiber product having an excellent fit feeling by having an elastic material and having a structure having stretchability.

Such a fabric is also required to have good appearance in the contracted state of the elastic member. In particular, in order to obtain a fiber product having an excellent appearance in terms of color, a stretchable fiber sheet colored in a predetermined color type is required as a fabric. In general, a method of obtaining a colored fiber sheet as a stretchable fiber sheet is generally performed by coating a paint containing a pigment for coloring on the surface of the stretchable fiber sheet or a sheet constituting the stretchable fiber sheet by printing or the like. Manufactured. However, when the surface of the stretchable fiber sheet or the sheet constituting the stretchable fiber sheet is coated with a paint on one side, the stretchable fiber sheet becomes hard, and the stretch required when using the stretchable fiber sheet as the fabric There is a possibility that the sex may be lost.

In addition, since the paint is applied to one surface of the stretchable fiber sheet or a sheet constituting the stretchable fiber sheet, it is necessary to use a large amount of coloring pigment, which may increase the manufacturing cost.

Besides the color point, for example, a three-dimensional effect is also important for the good appearance of the fabric in the state where the elastic member is contracted. Bringing a three-dimensional effect to the fabric can be expected to lead to an improvement in the fit of the textile product. Therefore, the stretchable fiber sheet is expected to further improve the three-dimensional effect.

The stretchable fiber sheet described in Patent Document 1 has room for further improvement in terms of the appearance.

An object of this invention is to obtain the elastic fiber sheet which improved the goodness of the appearance in the state which the elastic member shrink | contracted, and to provide the manufacturing method of this elastic fiber sheet.

The present invention comprises a fiber sheet provided with a repeat pattern in which handle units formed in a predetermined shape are repeatedly arranged, and an elastic member joined to the fiber sheet, and the repeat pattern is a plan view of the fiber sheet. The elastic member is divided into a visible portion constituted by a portion visually recognized from the outside in a contracted state, and a non-visible portion constituted by a portion deviated from the visible portion; The gist of the present invention is a stretchable fiber sheet, in which the bowl-like structure is formed such that the ratio of the non-visible portion to the repeat pattern is higher as the expansion ratio of the fabric is higher.

In the present invention, a first sheet forming a first fiber layer, a second sheet forming a second fiber layer, a fiber material sheet forming a layer of fiber material, and a linear elastic member The method includes the steps of: supplying an elastic member group having a structure spaced apart from one another; and joining the first sheet, the elastic member group, the fiber material sheet, and the second sheet. A method of producing a stretchable fiber sheet, wherein the step of attaching an organic binder to the fiber material sheet prior to the bonding step is also summarized.

According to the present invention, it is possible to obtain a stretchable fiber sheet in which the appearance is improved in a state where the elastic member is contracted, and to provide a method of manufacturing the stretchable fiber sheet.

FIG. 1 is a schematic plan view schematically showing one of the examples of the stretchable fiber sheet of the present invention in a stretched state. FIG. 2 is a schematic side surface schematic view for schematically showing one example of the state of the stretchable fiber sheet when the elastic member is in a contracted state. FIG. 3A is a schematic view for schematically showing one embodiment in which the continuous handle is a lattice, and a schematic partial enlarged schematic view for explaining the handle unit shown in the area surrounded by the broken line. . FIG. 3B is a schematic view for schematically showing one embodiment in which the continuous pattern is a wave stripe pattern, and a schematic partial enlarged schematic view for explaining the handle unit shown in the area surrounded by the broken line. . FIG. 3C is a schematic view for schematically showing one embodiment in the case where the continuous handle is a composite handle, and a schematic partial enlarged schematic view for explaining the handle unit shown in the area surrounded by the broken line. . FIG. 4 is a schematic perspective schematic view for schematically showing an example of a hook-like structure formed in the stretchable fiber sheet. FIG. 5 is a schematic partial enlarged schematic view for schematically showing an example in which a part of a hook-like structure formed in a fiber sheet is enlarged. FIG. 6A is a schematic cross-sectional schematic view for explaining an example of the stretchable fiber sheet when the fiber sheet is a single layer sheet. FIG. 6B is a schematic cross-sectional schematic view and a schematic partial enlarged view for explaining an example of the stretchable fiber sheet when the fiber sheet is a laminated sheet. FIG. 7 is a schematic view showing an example of a production line of elastic fiber sheets in an embodiment of the present invention. FIG. 8A is a view for explaining the position of the continuous handle with respect to the convex portion and the concave portion in plan view of the fiber sheet in a state where the elastic member is contracted. FIG. 8B is a schematic cross-sectional schematic view for schematically showing the state of the cross section along line AA of FIG. 8A. FIG. 8C is a schematic cross-sectional schematic view for schematically showing the state of the BB line cross-section of FIG. 8A.

One of the embodiments of the stretchable fiber sheet of the present invention is described as follows using the drawings.

[Stretchable fiber sheet 1]
The stretchable fiber sheet 1 is provided with the fiber sheet 2 to which the handle 3 was given repeatedly, and the elastic member 5 joined to the fiber sheet 2, as shown in FIG.1, FIG.2, FIG.4 and FIG.

(Fiber sheet 2)
The fiber sheet 2 may be either a single-layer sheet or a laminated sheet in which a plurality of layers are laminated as shown in FIGS. 6A and 6B. From the viewpoint of efficiently and simultaneously achieving a plurality of effects such as the good appearance of the stretchable fiber sheet 1 and the goodness of functions such as fit and air permeability, it is preferable that the laminated sheet be used as the fiber sheet 2 . By causing each of the layers constituting the laminated sheet to have a predetermined function, the laminated sheet as a whole can exhibit a further excellent function.

The type of the fiber sheet 2 is not particularly limited, and examples thereof include paper such as tissue paper and thin paper such as crepe paper, or non-woven fabric such as spun bond non-woven fabric, spun lace non-woven fabric and thermal bond non-woven fabric. It is preferable that paper be used as the fiber sheet 2 from the viewpoint of easily achieving printing of a finer and repeated pattern and surface coating.

The non-woven fabric refers to a cloth other than a cloth made by longitudinally and horizontally weaving fibers. In addition to natural fibers (plant fibers (cellulose polymers), animal fibers (protein polymers), etc.), purified fibers (Lyocell, Tencel, etc.), regenerated fibers such as rayon, viscose rayon, acetate, etc. And synthetic fibers such as nylon, etc. are all included. These fibers are suitably selected according to the use applied. Moreover, the fiber used for a nonwoven fabric may be used individually by 1 type, and 2 or more types may be used together.

When the fiber sheet 2 is a laminated sheet, as shown in FIG. 6B, the first fiber layer 12 and the second fiber layer 13 having air permeability, the first fiber layer 12 and the first fiber layer 12 are used as the fiber sheet 2. A laminated sheet 2a having a structure in which a layer 14 of a fiber material having liquid diffusibility is interposed between the two fiber layers 13 may be employed. When the laminated sheet 2 a is used as the fiber sheet 2, the stretchable fiber sheet 1 has good air permeability, and is excellent in water transpiration ability to absorb and dry sweat. In addition, when the stretchable fiber sheet 1 using the laminated sheet 2a as the fiber sheet 2 is used as a fabric for a fiber product, as a fiber product, flexibility of the fabric itself, fit with the body, and contact with the skin You can get an excellent touch feeling when you are doing.

(Layer 14 of textile material)
The layer 14 of fiber material is excellent in liquid diffusibility. When applying the stretchable fiber sheet 1 in applications such as diapers and sanitary goods where the water absorption is required, secure sufficient absorbency in the stretchable fiber sheet 1 Is required. In this respect, when the laminated sheet 2a provided with the layer 14 of the fiber material is used as the fiber sheet 2, the stretchable fiber sheet 1 excellent in water absorption can be easily obtained.

In the case where the stretchable fiber sheet 1 is provided with the laminated sheet 2a as the fiber sheet 2, from the viewpoint of further improving the water absorption of the stretchable fiber sheet 1, the layer 14 of the fiber material is a paper sheet. Is preferred. As the paper sheet, it is possible to use pulp paper or a paper material formed of a material whose main raw material is pulp. That is, as the paper sheet, a paper material produced by processing the base paper sheet as the raw material sheet by a plurality of steps can be used. When the paper sheet is formed of a material having pulp as a main material, the blending of the pulp is preferably 30% or more, and more preferably 50% or more.

When the layer 14 of fiber material is a paper sheet, it is easy to apply a fine handle on the surface of the layer 14 of fiber material. For example, a fine handle can be easily applied to the surface of the layer 14 of fiber material by a technique such as inkjet printing or flexographic printing. When the fiber sheet 2 is the above-described laminated sheet 2a, it is preferable to form the handle 3 repeatedly on the layer 14 of the fiber material by a method such as printing.

When the fiber sheet 2 of the stretchable fiber sheet 1 is the laminated sheet 2 a and the handle 3 is repeatedly formed on the layer 14 of the fiber material by a method such as printing, the repeat handle 3 is a layer 14 of the fiber material. It may be formed on either of the surfaces. However, among the surfaces of the layer 14 of fiber material, it is preferable that the surface be formed so as to avoid that the elastic member 5 repeatedly coats a part of the handle 3. For example, in the laminated sheet 2a shown in FIG. 6B, it is preferable that the handle 3 be repeatedly formed on the surface of the layer 14 of the fiber material facing the second fiber layer 13.

(First fiber layer 12, second fiber layer 13)
Each of the first fiber layer 12 and the second fiber layer 13 may be appropriately used a sheet made of a non-woven fabric as described above which can be used as the fiber sheet 2. However, the first fiber layer 12 and the second fiber layer 13 are made of different materials from the fiber material layer 14. In addition, when the handle 3 is repeatedly formed in the surface side facing the 2nd fiber layer 13 among the surfaces of the layer 14 of a fiber material, the nonwoven fabric used for the 2nd fiber layer 13 is a fiber material It is preferable to select a material that allows the repetitive handle 3 formed on the layer 14 to be properly recognized from the outside.

The bonding state of the first fiber layer 12 and the layer 14 of fiber material, and the bonding state of the second fiber layer 13 and the layer 14 of fiber material are not particularly limited. For example, as shown in the example of FIG. 6B, in the fiber sheet 2 of the stretchable fiber sheet 1, the second fiber layer 13 and the layer 14 of fiber material are firmly joined via the layer 15 of adhesive. It may be joined intermittently. The first fiber layer 12 and the layer 14 of the fiber material are intermittently joined via an elastic member from the viewpoint of improving the functions of moisture transpiration, heat dissipation and moisture permeability in the stretchable fiber sheet 1 Is preferred.

(Elastic member 5)
The elastic member 5 is joined to the fiber sheet 2 as shown to FIG. 6A and FIG. 6B. When the fiber sheet 2 is a laminate type sheet, the elastic member 5 may be bonded to the outermost surface side of the fiber sheet 2 or may be interposed between layers constituting the laminate type sheet. When the elastic member 5 intervenes between the layers constituting the laminated sheet, the elastic member 5 is not exposed to the outer surface of the stretchable fiber sheet 1, and the appearance of both sides of the stretchable fiber sheet 1 is further facilitated. Can be improved.

As the elastic member 5, as exemplified in FIGS. 1, 2, 4 and 5, a linear elastic body 5 a having stretchability can be suitably used. As the linear elastic body 5a, a thread-like rubber material is suitably used.

As shown in FIG. 1 and FIG. 2 etc., a large number of elastic members 5 are arranged at intervals, and an elastic member row is formed by the elastic members 5. In the example of FIGS. 1 and 2, etc., the linear elastic body 5a which is the elastic member 5 is arranged such that the stretch direction is along the longitudinal direction of the fiber sheet 2 (X direction in FIG. 1, FIG. 2) . Then, a large number of linear elastic bodies 5a are arranged at predetermined intervals in the width direction (the Y direction in FIGS. 1 and 2) of the fiber sheet 2 in a state in which the expansion and contraction directions are aligned. 1 and 2, the X direction is the direction in which the elastic member 5 extends and contracts, and the Y direction is the direction orthogonal to the direction in which the elastic member 5 extends and contracts.

(Installation interval of elastic member 5)
The arrangement interval (indicated by symbol K in FIG. 1) of the adjacent elastic members 5 (linear elastic bodies 5a) can be selected as appropriate. The arrangement interval is preferably 1 mm or more and 6 mm or less, from the viewpoint of forming the ridge-like structure 60 with a good appearance by forming a large number of appropriately small convex portions 6 a and concave portions 6 b in the entire stretchable fiber sheet 1. It is more preferable that a value in the range of about 5 mm to 5 mm is selected.

Further, the arrangement interval of the elastic members 5 is approximately equal to the repetition period of the handle unit 4 described later, the balance between the size of the convex portion 6 a and the recess 6 b and the handle unit 4 becomes good, and the elastic fiber sheet It is preferable in that the design of the appearance of 1 is further improved.

(Expansion rate of elastic member 5)
The expansion and contraction rate of the elastic member 5 can be appropriately selected, but it is preferable that the non-visible portion can be more reliably formed on the repeat pattern 3 as being 1.6 times or more. The expansion ratio of the elastic member refers to the ratio (L1 / L2) of the length (L1) when the elastic member is most extended to the natural length (L2) of the elastic member. The expansion ratio of the elastic member 5 is preferably about 1.2 times to 5 times, and more preferably 1.5 times to 3 times. If the expansion and contraction ratio of the elastic member 5 is less than 1.2 times, it is difficult for the weir-like structure 60 to be sufficiently formed, and the fiber sheet 2 in a state where the elastic member 5 is stretched and a state where the elastic member 5 is contracted. There is a risk that the change of the handle 3 will be scarce. When the expansion ratio of the elastic member 5 exceeds 5 times, the area M2 of the portion facing the outside from the gap between the adjacent convex portions 6a described later becomes too small, and the three-dimensional effect of the stretchable fiber sheet 1 becomes thin. Cause a risk. Moreover, when the expansion ratio of the elastic member 5 exceeds 5 times, the quantity of the raw material of the fiber sheet 2 will become excessive, and there also exists a possibility of causing a significant raise of manufacturing cost.

(Material of elastic member 5)
As the elastic member 5, urethane, rubber based on silicon or the like, rubber made of other synthetic material, natural rubber, other elastic material or the like can be used.

(Joining of elastic member 5 and fiber sheet 2)
The bonding method of the elastic member 5 and the fiber sheet 2 can be selected appropriately, but it is firmly that the elastic member 5 is bonded to the fiber sheet 2 by adhesion using an adhesive. It is preferable from the viewpoint of securing bonding with the fiber sheet 2. Although an adhesive agent can be selected suitably, a hot melt adhesive agent is preferably selected in the point which joins the elastic member 5 and the fiber sheet 2 more easily and reliably. At this time, the hot melt adhesive is not limited to a specific adhesive. As a hot melt adhesive, known adhesives, for example, EVA (ethylene vinyl acetate copolymer) type, PO (polyolefin) type, PA (polyamide) type, SR (synthetic rubber) type, ACR (acrylic) type, It is possible to use PUR (polyurethane, moisture curing type) or the like. These adhesives may be used alone or in combination of two or more. Bonding of the elastic member 5 and the fiber sheet 2 may be carried out by bonding the elastic member 5 in which an adhesive is applied to the fiber sheet 2, or an adhesive is applied to bond the elastic member 5 to the fiber sheet 2. May be implemented.

(Repeated pattern 3)
The fiber sheet 2 is repeatedly provided with a handle 3. When the fiber sheet 2 is a single layer sheet, the handle 3 is repeatedly provided on at least one of the surfaces of the fiber sheet 2. When the fiber sheet 2 is a laminate type sheet, the handle 3 is repeatedly provided on the surface of at least one of the layers constituting the fiber sheet 2. In the case where the fiber sheet 2 is the laminated sheet 2a shown in FIG. 6, as described above, of the faces of the layer 14 of the fiber material, on the side facing the second fiber sheet, the handle 3 is repeatedly Is preferably applied.

In a state in which the elastic member 5 of the stretchable fiber sheet 1 is stretched, the repeat handle 3 has a configuration in which handle units 4 (4a) formed in a predetermined shape are repeatedly arranged in a predetermined pattern in plan view of the fiber sheet 2 Equipped with Here, the planar view of the fiber sheet 2 indicates a state in which the fiber sheet 2 is viewed with the direction along the thickness direction of the fiber sheet 2 as the line-of-sight direction.

(Pattern unit 4)
The handle unit 4 is not particularly limited as long as it is formed into a predetermined shape by a point, a line, or the like. The line usable as an element for forming the handle unit 4 may be a straight line, a curved line, or a combination thereof. Specifically, as shown in FIG. 3A, FIG. 3B, and FIG. 3C, the pattern unit 4 includes geometric figure patterns, line patterns, patterns combining them, and patterns combining plural types of geometric figures. Can. Moreover, two or more types of handle units 4 may exist in the fiber sheet 2.

The repeated handle 3 is specified by the shape of the handle unit 4 and the arrangement pattern thereof.

In a state in which the elastic member 5 of the stretchable fiber sheet 1 is stretched, the repeat handle 3 shown in the example of FIGS. 1 and 3A is a grid handle, and the handle unit 4a is formed in a rhombus shape with four line segments There is. The repeat handle 3 is formed by using one of the vertexes of the handle units 4a adjacent to each other in the stretch direction (X direction) of the elastic member 5 and the direction (Y direction) orthogonal to the stretch direction. It is an arrangement pattern in which the handle units 4a are repeatedly arranged in the Y direction.

In the example of the repeated handle 3 shown in FIG. 1, the handle unit 4 a is disposed such that the elastic member 5 obliquely intersects the line (line segment) forming the handle unit 4 in the planar view of the fiber sheet 2 It is done. The shape of the handle unit 4 in the planar view of the fiber sheet 2 is likely to be a different shape in the contracted state of the elastic member 5 and in the expanded state of the elastic member 5. The appearance of the elastic fiber sheet 1 can be reliably changed.

In the example of FIG. 3B, in a state in which the elastic member 5 of the stretchable fiber sheet 1 is stretched, the repetitive handle 3 has a wave stripe pattern. The wave stripe pattern can be formed by arranging a plurality of corrugations 10 in which the pattern units 4 (4b) of the waveform are repeatedly connected in the X direction while sharing one end of the waveform with each other at intervals in the Y direction.

In the example shown in FIG. 3C, in the state in which the elastic member 5 of the stretchable fiber sheet 1 is stretched, the repeat handle 3 is a composite handle in which the apexes of the diamonds constituting the lattice pattern are replaced by circles. The handle unit 4 (4c) forming this composite handle has a shape obtained by fusing a circle (reference numeral 40 in FIG. 3C) centered on each position of the four apexes of the diamond with respect to the diamond. In this example, the composite handle is formed as follows. A plurality of handle units 4c are repeatedly connected in the X direction and the Y direction while one of the four circular portions 40 is shared with each other to form the handle 3 repeatedly.

In the example of FIG. 3A to FIG. 3C, the handle units 4 are connected to each other to form a continuous handle in the example of FIGS. 3A to 3C, but the handle units 4 are repeatedly arranged in a state of being separated from each other to form the repeat handle 3 It is also good. Specifically, the repeat pattern 3 may be a water drop pattern. However, from the viewpoint of making the stretchable fiber sheet look colored in a predetermined color when the repeatable pattern 3 is a colored part and the stretchable fiber sheet 1 is seen from a distance, the repeat pattern 3 has a continuous pattern Is preferred. When the stretchable fiber sheet 1 is viewed from a position separated from the stretchable fiber sheet 1 by a predetermined distance or more, the stretchable fiber sheet 1 has the color of the colored portion 30 and the non-colored portion 31 in the contracted state of the fiber sheet 2 It can be made to look like a sheet that exhibits a mixed color with the color of.

(Repeat cycle of pattern unit 4)
In the stretchable fiber sheet 1, as described above, the repetition cycle of the handle unit 4 is preferably substantially the same as the interval between the adjacent elastic members 5. The repetition cycle of the handle unit 4 corresponds to the one end 11a of one handle unit 4 and the one end 11a of the other handle unit 4 in the two handle units 4 adjacent along the expansion and contraction direction of the elastic member 5 It can be defined as the distance W to the portion 11 b.

(Candid 60)
The elastic fiber sheet 1 is in a state where the elastic member 5 joined to the fiber sheet 2 is contracted in a state where no load is applied from the outside. In this state, the stretchable fiber sheet 1 forms a cocoon-shaped structure 60.

The bowl-like structure 60 is formed as follows. For example, after the elastic member 5 is bonded to the fiber sheet 2 in a stretched state in which a load is applied, the elastic force of the elastic member 5 acts when the elastic member 5 is released from the stretched state. . With this restoring force, the elastic member 5 is contracted, and in the region between the adjacent elastic members in the fiber sheet 2, a large number of convex portions in the expansion and contraction direction of the elastic member 5 (X direction in FIGS. 2 and 4) 6a and the recessed part 6b are formed, and the uneven | corrugated row 6 is formed. Moreover, in the example of FIG. 2, FIG. 4, the groove part 7 is formed along the junction part with the elastic member 5 in the fiber sheet 2, and the uneven row 6 and the groove part 7 line up with the elastic member 5 (FIG. 2, FIG. In the Y direction). Thus, a bowl-like structure 60 is formed. In addition, the ridge-like structure 60 is not limited to when the groove part 7 is formed in the joining part with the elastic member 5 in the fiber sheet 2. FIG. The groove 7 is formed in a part of the bonding portion of the fiber sheet 2 with the elastic member 5, and the non-formed portion of the groove 7 is present in a part of the bonding portion of the fiber sheet 2 with the elastic member 5 It is also good. Moreover, the convex part 6a and the recessed part 6b may be formed so that the non-formation part may be crossed.

In the fiber sheet 2, the wedge-shaped structure 60 is formed such that the ratio of the non-visible portion 35 to the repeat pattern 3 is higher as the expansion ratio of the elastic member 5 is higher. Here, the ratio of the non-viewing portion 35 to the repeat pattern 3 means that the selected repeat pattern 3 is selected when a portion of the repeat pattern 3 having a predetermined length is selected along the repeat direction of the repeat pattern 3 The length of the non-viewing portion 35 (length along the repetition direction) is shown.

(Visual unit 34 and non-visual unit 35)
In a state in which the stretchable fiber sheet 1 forms the ridged structure 60 in the fiber sheet 2, as shown in FIGS. 8A, 8B, and 8C, the repeated handle 3 of the fiber sheet 2 is a plan view of the fiber sheet 2. It is divided into a visible portion 34 which can be viewed from the outside of the repeat pattern 3 and a non-viewing portion 35 which is configured by another portion of the repeat pattern 3 which is deviated from the visible portion 34. The visible portion 34 of the repeat pattern 3 is formed in an exposed surface area 32 of the fiber sheet 2 described later, and the non-visible portion 35 of the repeat pattern 3 is formed in an unexposed surface area 33 described later.

In the ridge-like structure 60, as shown in FIG. 8B in plan view of the fiber sheet 2, the convex portion 6a and the concave portion 6b are formed such that the convex portion 6a covers at least a part of the concave portion 6b. The surface of the sheet 2 is divided into an exposed surface area 32 and a non-exposed surface area 33. The exposed surface area 32 is formed by an area M1 of the projecting end portion 36 of the convex portion 6a and an area M2 of a portion of the bottom portion 37 of the concave portion 6b facing outward from the gap between the adjacent convex portions 6a. The non-exposed surface area 33 is formed in the area of the surface of the fiber sheet 2 excluding the exposed surface area 32.

In the ridge-like structure 60, as the expansion ratio of the elastic member 5 joined to the fiber sheet 2 is higher, the portion of the bottom 37 of the recess 6b covered by the protrusion 6a tends to increase, and the number of the protrusions 6a and the recesses 6b The concavo-convex row 6 formed more densely is easily formed, and the difference in height (symbol H in FIG. 8B) between the projecting end 36 of the convex portion 6 a and the bottom 37 of the concave portion 6 b tends to increase. In the case where the ridge-like structure 60 is configured in this manner, the higher the expansion ratio of the elastic member 5 joined to the fiber sheet 2, the more the non-exposed surface area 33 increases. The ratio of 35 is high. For example, as shown in FIG. 8C, when the arrangement pattern of the repetitive pattern 3 applied to the fiber sheet 2 is a continuous pattern applied across the exposed surface area 32 to the unexposed surface area 33, the unexposed surface With the increase of the area 33, the ratio of the non-viewing portion 35 to the repeat pattern 3 is more reliably increased.

Further, according to the stretchable fiber sheet 1, in the state where the elastic member 5 is contracted, the higher the expansion ratio of the elastic member 5 is, the more densely the convex portion 6 a and the concave portion 6 b are formed, The proportion of non-visible parts in the For this reason, even if many convex parts 6a and concave parts 6b are formed densely, the part of repeat pattern 3 formed in field M1 of projection end 36 of convex part 6a among visual recognition parts 34 and convex part 6a The portion of the repetitive handle 3 formed in the area M2 of the portion facing the outside from the gap between the two is unlikely to be an excessively dense arrangement pattern in a plan view of the fiber sheet 2. Therefore, the portion of the repeat pattern 3 formed in the area M1 and the portion of the repeat pattern 3 formed in the area M2 can be easily visually distinguished, and the stretchable fiber sheet 1 can be easily provided with a sense of depth. Thus, the stretchable fiber sheet 1 can be further improved in the three-dimensional effect of the whole.

According to the stretchable fiber sheet 1, the ridge-like structure 60 is formed such that the proportion of the non-visible portion 35 in the handle 3 repeatedly increases as the stretch ratio of the elastic member 5 in the stretchable fiber sheet 1 increases. Then, the state of the repeated handle 3 seen from the appearance of the fiber sheet 2 in a state in which the elastic member 5 is stretched and the state of the repeated handle 3 seen from the appearance of the fiber sheet 2 in a contracted state of the elastic member 5 are changed appropriately. The stretchable fiber sheet 1 can be used as a fabric to obtain a fiber product having an excellent appearance.

(Colored part 30 and non-colored part 31)
It is preferable that the colored part 30 and the non-colored part 31 be formed on the surface of the fiber sheet 2 as shown in FIG. The surface of the fiber sheet 2 referred to herein indicates the surface of the fiber sheet 2, but in the case where the fiber sheet 2 has another layer sandwiched between sheets constituting the surface like the laminated sheet 2 a, In the range which is a layer which can be visually recognized from the surface of textile sheet 2, the surface of other layers is also included. Therefore, when the fiber sheet 2 is the laminated sheet 2a, the layer 14 of the fiber material is also a target of the layer forming the colored portion 30. In addition, the colored portion 30 is a portion colored in a color different from the ground color of the fiber sheet 2, and the non-colored portion 31 is configured by a portion which is separated from the colored portion 30. At this time, it is preferable that the coloring part 30 forms the handle 3 repeatedly. Thus, when the stretchable fiber sheet 1 is viewed from a position away from the stretchable fiber sheet 1 by a predetermined distance or more, the stretchable fiber sheet 1 is formed by the fiber sheet 2. In the contracted state, the sheet can be made to look like a sheet exhibiting a mixed color of the color of the colored portion 30 and the color of the non-colored portion 31. That is, the stretchable fiber sheet 1 is printed entirely on the stretchable fiber sheet 1 with the ink or paint of the color corresponding to the mixed color, or the ink or paint of the color corresponding to the mixed color is not entirely coated. 1 can be colored to correspond to the mixed color.

[Method of producing stretchable fiber sheet 1]
About the manufacturing method of the elastic fiber sheet 1, the case where the fiber sheet 2 which comprises the elastic fiber sheet 1 is the lamination sheet 2a is demonstrated as an example.

In the method of manufacturing the stretchable fiber sheet 1, the first sheet forming the first fiber layer, the second sheet forming the second fiber layer, and the fiber material sheet forming the layer of the fiber material and the wire Supplying an elastic member group having a structure in which a plurality of elastic members are arranged separately from each other, and a joining step of joining the first sheet, the elastic member group, the fiber material sheet, and the second sheet Is included. Moreover, in the manufacturing method of the elastic fiber sheet 1, it is preferable that the process to which the organic binder is made to adhere to the sheet made from fiber material be performed as a softening process of a fiber sheet before a joining process.

These steps will be further described using a production line 200 illustrated in FIG.

FIG. 7 is a schematic view showing a production line 200 of the stretchable fiber sheet 1. In addition, manufacture of the elastic fiber sheet 1 is normally performed by control of the control apparatus (not shown) provided with CPU. Hereinafter, the manufacturing method of the elastic fiber sheet 1 is demonstrated using FIG. The layout of the manufacturing line 200 shown in FIG. 7 is an example, and the arrangement and combination of various devices may be appropriately changed depending on the space of the factory, the application of the stretchable fiber sheet 1, and the like.

(Process of supplying sheet 24 made of fiber material)
A continuous pattern corresponding to the repeat pattern 3 of the stretchable fiber sheet 1 is printed in advance, and the sheet 24 made of fiber material is wound in a roll shape to be in a state of the sheet roll 201.

The fiber material sheet 24 wound in the state of the sheet roll 201 is fed out in the -V direction. An adhesive is applied to the surface of the fiber material sheet 24 by the first adhesive application device 203 before being bonded to the second sheet 23 by the pressing roll 209a. Preferably, a hot melt adhesive is used as the adhesive, but this does not exclude the use of anything other than a hot melt adhesive as the adhesive.

(Softening treatment of the sheet 24 made of fiber material)
Preferably, the fiber material sheet 24 is subjected to a softening treatment such as a chemical softening treatment or a mechanical softening treatment before the adhesive is applied to the surface thereof by the first adhesive applying device 203. . Such softening treatment corresponds to the softening treatment of the fiber sheet of the stretchable fiber sheet. That is, by applying such a softening treatment to the sheet 24 made of fiber material, the flexibility as the whole fiber sheet is improved, and as the expansion ratio of the elastic member 5 becomes high, the convex portion 6a and the concave portion are formed on the fiber sheet 2 It becomes easier to form a state in which 6b is formed in a more dense state. Then, it becomes easy to form the weir-like structure 60 on the fiber sheet 2 so that the proportion of the non-visible portion 35 in the handle 3 repeatedly increases as the expansion ratio of the elastic member 5 increases.

(Chemical softening process)
It is preferable that the process of allowing the binder spraying device 221 to attach an organic binder to the sheet 24 made of a fiber material drawn out from the sheet roll 201. As an organic binder, EVA (ethylene vinyl acetate copolymer) etc. can be illustrated.

The fiber material sheet 24 to which the organic binder is attached is dried by passing through the drying furnace 222.

(Mechanical softening process)
The sheet 24 made of fiber material is further subjected to mechanical softening treatment by being embossed by the pair of embossing rolls 202a. Since a plurality of embossing rolls 202 are used in the manufacturing line 200, an alphabet is added and explained. However, in each part of the manufacturing line 200, the emboss roll 202 having the same emboss pattern, size, and material may be used, or the emboss roll 202 having different emboss pattern, size, and material may be used.

(Supply process of the second sheet 23)
The second sheet 23 wound in the state of the sheet roll 207 is drawn out by the conveyance roll 208a and is fed out in the -Z direction.

(Joining process of the second sheet 23 and the sheet 24 made of fiber material)
The second sheet 23 is joined to the fiber material sheet 24 and joined to the fiber material sheet 24 by the pressing roll 209a.

In addition, in the manufacturing line 200, since several conveyance roll 208 is used, an alphabet is added and demonstrated. In each part of the manufacturing line 200, conveyance rolls having the same size and rotational speed may be used, or conveyance rolls having different sizes and rotational speeds may be used. Moreover, in the manufacturing line 200, since the several press roll 209 is used, an alphabet is added and demonstrated. In each part of the manufacturing line 200, the pressing rolls 209 having the same size and the like may be used, or pressing rolls having different sizes and the like may be used. The number, size, pressing force and the like of the pressing rolls 209 can be set as appropriate.

After the second sheet 23 and the fiber material sheet 24 are joined, a functional material may be applied to the fiber material sheet 24 according to the purpose or application. As a functional substance, a deodorant, an insect repellent, a fragrance, a waterproofing agent, an antifouling agent, an antibacterial agent etc. can be illustrated.

The functional substance can be applied to the surface of the sheet 24 made of fiber material that is not facing the second sheet 23 using the functional substance application device 150. In the production line 200, a plurality of functional substance application devices 150 may be provided.

By applying the softener with the functional substance application device 150, the fiber material sheet 24 can be made more flexible. As the softener, a polyol (for example, glycerin) which is a polyhydric alcohol can be used. The functional material is applied after the fiber material sheet 24 passes through the emboss roll 202a and the mechanical softening process is performed. If the functional material (for example, glycerin) is applied to the fiber material sheet 24 before passing through the embossing roll 202a, there is a possibility that the fiber material sheet 24 may be broken at an unplanned part.

The composite sheet of the second sheet 23 and the fibrous material sheet 24 is conveyed in the + Z direction by the conveying roll 208 b.

(Supply of elastic members 25)
A large number of elastic members 5 are arranged in a state in which the expansion and contraction directions are aligned to form an elastic member group 25. The elastic member group 25 is in a state of being wound in a roll, and becomes an elastic roll 210. The elastic member group 25 is drawn out from the state of the elastic roll 210, and the adhesive is applied to the individual elastic members 5 constituting the elastic member group 25 by the second adhesive application device 211. As an adhesive applied by the second adhesive application device 211, it is preferable to use a hot melt adhesive. However, this does not limit the adhesive applied by the second adhesive application device 211 to a hot melt adhesive. Also, the adhesive applied by the second adhesive application device 211 may be the same as or different from the adhesive applied by the first adhesive application device 203.

(Step of supplying the first sheet 22)
From the sheet roll 207 formed by winding the first sheet 22 in a roll, the first sheet 22 is drawn out by the conveyance roll 208 c and conveyed in the −Z direction.

(Step of Joining First Sheet 22, Elastic Member Group 25, Second Sheet 23, and Sheet 24 Made of Fiber Material)
The composite sheet of the second sheet 23 and the sheet 24 made of fiber material, the first sheet 22 and the elastic member group 25 are merged by the pressing roll 209 b. At this time, the first sheet 22 and the composite sheet (the composite sheet of the second sheet 23 and the sheet 24 made of fiber material) are pressed through the elastic member 5 to which the adhesive is applied. As a result, the first sheet 22, the elastic member group 25, the second sheet 23, and the sheet 24 made of fiber material are joined to each other. Thus, the laminated sheet 2a to be the fiber sheet 2 is manufactured, and a state in which the elastic member 5 is joined to the fiber sheet 2 is formed, and the stretchable fiber sheet 1 is obtained. The obtained stretchable fiber sheet 1 has a laminated structure in which a first fiber layer 12, an elastic member 5, a layer 14 of fiber material, and a second fiber layer 13 are laminated in order as shown in FIG. 6B. .

(Post-processing process)
The stretchable fiber sheet 1 is preferably further subjected to mechanical softening treatment by embossing with a pair of embossing rolls 202b. The pair of embossing rolls 202 b may be provided after the heating device 215 or may be provided before and after the heating device 215. Also, the pair of embossing rolls 202b may be omitted.

(Heating process)
The stretchable fiber sheet 1 is preferably subjected to heat treatment. When the stretchable fiber sheet 1 is subjected to heat treatment, even if the stretchability of the elastic member 5 is weakened in the manufacturing process, the stretchability of the elastic member 5 can be restored to some extent or the stretch ratio can be increased.

In the heat treatment step, the stretchable fiber sheet 1 is conveyed in a stretched state (or a stretched state to some extent).

In the manufacturing line 200, as shown in FIG. 7, non-contact heating by the heating device 215 and contact heating by the heating rolls 216a, 216b, 216c, and 216d are performed as the heat treatment. However, either one may be omitted.

The heating device 215 is, for example, a non-contact heating device that supplies hot air at 30 to 80 ° C. The plurality of heating rolls 216 can be, for example, rolls heated to 30 to 80.degree. The heating rolls 216a and 216c contact the lower second sheet 23 of the stretchable fiber sheet to heat the stretchable fiber sheet 1. The heating rolls 216b and 216d contact the upper first sheet 22 of the stretchable fiber sheet to heat the stretchable fiber sheet 1. The number of heating rolls 216 is not limited to the example shown in FIG.

(Processing process)
The heat-treated stretchable fiber sheet 1 may be subjected to a processing step depending on the application. For example, the processing process may be drilling using a drilling device 217. As the punching device 217, for example, a die cut roll can be used, but it is not limited thereto.

Further, the processing process may be a folding process by the folding device 218 for folding the stretchable fiber sheet at a predetermined position. In this case, a bonding process may be performed in which a predetermined position of the folded back elastic fiber sheet 1 is bonded by the bonding device 219.

(Cutting process)
And the elastic fiber sheet 1 may be cut | judged by the cutting device 220 provided with the cutter as needed.

The embodiments described above are examples of preferred implementations of the invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 elastic fiber sheet 2 fiber sheet 3 repeating handle 4 handle unit 5 elastic member 5a linear elastic body 6a convex part 6b recessed part 6 uneven | corrugated row 7 groove part 10

wave pattern

11a, 11b end of handle unit 12 1st fiber layer 13 Second fiber layer 14 Fiber material layer 15 Adhesive layer 22 First sheet 23 Second sheet 24 Fiber material sheet 25 Elastic member group 30 colored portion 31 non-colored portion 32 exposed surface region 33 unexposed surface region 34 The visible portion 35 the non-visible portion 60

Claims

A fiber sheet provided with a repeat pattern in which pattern units formed in a predetermined shape are repeatedly arranged;
Comprising an elastic member bonded to the fiber sheet,
In a visible portion constituted by a portion where the repetitive handle is visually recognized from the outside in a state where the elastic member is contracted in plan view of the fiber sheet, and a non-visual portion constituted by a portion deviated from the visible portion Divided,
When the elastic member is shrunk, the fiber sheet is formed in a hook-like structure such that the ratio of the non-visible portion in the repetitive handle increases as the elastic modulus of the elastic member increases. Fiber sheet.
The surface of the fiber sheet is divided into a colored portion colored in a color different from the background color of the fiber sheet and a non-colored portion constituted of a portion separated from the colored portion,
The elastic fiber sheet according to claim 1, wherein the repeated handle forms the colored portion.
The elastic member is linear,
The plurality of elastic members are arranged at predetermined intervals from one another,
The elastic fiber sheet according to claim 1, wherein a repetition cycle of the handle unit corresponds to an arrangement interval of the elastic members.
The repeating pattern is a lattice pattern,
The elastic fiber sheet according to claim 1, wherein the elastic member is joined to the fiber sheet so as to obliquely intersect a line forming the lattice pattern.
The fiber sheet comprises a layer of fibrous material having liquid diffusivity between the first fiber layer and second fiber layer having air permeability, and the first fiber layer and second fiber layer. A laminated sheet having a
The elastic fiber sheet according to claim 1, wherein the elastic member is disposed between the first fiber layer and the layer of the fiber material.
The stretchable fiber sheet according to claim 1, wherein the fiber sheet is subjected to a softening treatment.
Fiber material sheet and linear elasticity forming a first sheet forming a first breathable fiber layer, a second sheet forming a breathable second fiber layer, and a layer of fiber material Supplying an elastic member group having a structure in which the members are arranged separately from each other;
And a joining step of joining the first sheet, the elastic member group, the fiber material sheet, and the second sheet,
The manufacturing method of the elastic fiber sheet which performs the process to which the organic binder is made to adhere to the said sheets made of fiber material before this joining process.