WO2020090578A1

WO2020090578A1 - Engagement assembly kit and engagement assembly.

Info

Publication number: WO2020090578A1
Application number: PCT/JP2019/041514
Authority: WO
Inventors: 松下　和宏; 徹落合; 小野　悟; 晃一河端
Original assignee: 株式会社クラレ
Priority date: 2018-10-30
Filing date: 2019-10-23
Publication date: 2020-05-07
Also published as: JP2020069392A; TW202106197A

Abstract

Provided are: an engagement assembly kit which is configured from a male-type face fastener and a nonwoven fibrous structure and can be reliably engaged with each other; and an engagement assembly assembled by the engagement assembly kit. The engagement assembly kit 100 is configured from: a male-type face fastener 10 in which a plurality of male-type engagement elements 11 stand on a substrate; and a nonwoven fibrous structure 20 having self-standing property, wherein the nonwoven fibrous structure 20 is provided with at least engagement parts having a thickness no smaller than the heights of the male-type engagement elements 11. The male-type engagement elements 11 are each configured from a stem part and at least one grip part spread out from the stem part, the engagement part is composed of fibers having the average fiber diameter of 1-50 μm, and has a porosity of 80-98.5%, and the ratio (C/(F×1000)) of the inner depth (C: mm) of the grip part to the average fiber diameter (F: μm) is 2 or more.

Description

Engagement assembly kit and engagement assembly

Related application

This application claims the priority of Japanese Patent Application No. 2018-203568 filed on October 30, 2018 in Japan, and the whole of which is cited by reference as a part of this application.

The present invention relates to an engagement assembly kit that is composed of a male surface fastener and a non-woven fiber structure and can be favorably engaged with each other, and an engagement assembly in which the engagement assembly kit is assembled.

In recent years, non-woven fabrics have been adopted as engagement materials for male surface fasteners in sanitary goods such as diapers, but when non-woven fabrics are used for engagement, there is a problem that the engagement force is not sufficient. ..

For example, in order to improve the engaging property of a nonwoven fabric, Patent Document 1 (International Publication No. 2016/031623) discloses a surface fastener female member having an engaging layer engageable with a male member. Disclosed is a female member for a surface fastener, wherein the ply layer includes a nonwoven fabric of fibers, the density of the nonwoven fabric in the engagement layer is 5 kg / m ³ to 110 kg / m ³ , and the diameter of the fibers is 15 μm to 60 μm. Has been done.

International Publication No. 2016/031623

However, Patent Document 1 only describes that a soft material such as a disposable diaper is used as the female member for the surface fastener.

In recent years, there is a new need for engaging a self-supporting non-woven fiber structure with a male surface fastener. In this case, the soft material as disclosed in Patent Document 1 does not have self-supporting property and is inferior in handleability, so that such needs cannot be satisfied.
On the other hand, since the non-woven fiber structure having self-supporting property is inferior in the engaging property with the male surface fastener due to the rigid structure required for the self-supporting property, the non-woven fiber structure is used in the male surface fastener. It is difficult to engage the body to a workable level.

Therefore, an object of the present invention is to provide an engaging assembly kit and its engaging assembly which are composed of a male surface fastener and a non-woven fabric fiber structure which can be self-supporting, and which can be well engaged with each other. Especially.
Another object of the present invention is an engagement assembly kit and its engagement, which are composed of a frame body, a male surface fastener, and a non-woven fiber structure which can stand by itself, and which can be well engaged with each other. To provide an assembly.

The inventors of the present invention have earnestly studied to achieve the above object, and as a result, it is important in the engagement between the male surface fastener and the non-woven fiber structure having self-supporting property (i) The engaging element has a trunk portion and a grip portion projecting from the trunk portion. (Ii) In the non-woven fiber structure, the engaging portion for engaging the male engaging element has a predetermined porosity. (Iii) In the non-woven fiber structure, the constituent fibers of the engaging portion have a specific average fiber diameter, and (iv) the male engaging element and the non-woven fiber structure have a specific relationship. In such a case, even in the case of a non-woven fibrous structure having self-supporting property that could not be engaged at a practical level, (v) the male engaging element is When inserting into the woven fiber structure, use the voids of the engaging portion of the non-woven fiber structure having a predetermined fiber diameter Since it is possible to compress the fibers of the portion that comes into contact with the grip portion, the male engagement element can be easily fitted, and (vi) the specific relationship between the male engagement element and the non-woven fiber structure can be obtained. The present invention has been found to improve the engagement between the male engaging element and the non-woven fibrous structure even if the non-woven fibrous structure is self-supporting, and has completed the present invention.

That is, the present invention can be configured in the following modes.
[Aspect 1]
A male surface fastener in which a plurality of male engaging elements stand on the base material, and an engaging assembly kit composed of a self-supporting non-woven fiber structure,
The non-woven fibrous structure includes at least an engaging portion having a thickness equal to or greater than the height of the male engaging element,
The male engaging element is composed of a trunk portion and at least one grip portion extending from the trunk portion,
The engaging portion is composed of fibers having an average fiber diameter of 1 to 50 μm, and has a porosity of 80 to 98.5% (preferably 85 to 98%, more preferably 88 to 97.5%). ,
The pocket depth (C: mm) of the gripping portion is 2 times or more (preferably 2 to 100 times, more preferably 2.) as the ratio (C / F × 1000) of the average fiber diameter (F: μm). 5 to 80 times, and more preferably 3 to 70 times).
[Aspect 2]
In the engagement assembly kit according to the aspect 1, in at least one direction of the non-woven fiber structure, the bending resistance according to the 45 ° cantilever method according to JIS L-1906 is 10 cm or more (preferably 11 cm or more, more preferably 12 cm or more, especially Engagement assembly kit, preferably 14 cm or more).
[Aspect 3]
In the engagement assembly kit according to

aspect

1 or 2, the male surface fastener is formed of at least one selected from the group consisting of a polyolefin resin, a polyamide resin, a polyester resin, and a thermoplastic elastomer. Assembly kit.
[Mode 4]
In the engagement assembly kit according to any one of aspects 1 to 3, the height of the male engagement element is 0.2 to 5.0 mm (preferably 0.3 to 4.0 mm, more preferably 0.4 to Engagement assembly kit, which is 3.0 mm, especially 0.5-1.5 mm).
[Aspect 5]
In the engagement assembly kit according to any one of aspects 1 to 4, the apparent density of the engagement portion of the non-woven fiber structure is 30 to 300 kg / m ³ (preferably 40 to 280 kg / m ³ , more preferably 50 to 250 kg / m ³ ), an engagement assembly kit.
[Aspect 6]
In the engagement assembly kit according to any one of the aspects 1 to 5, the male engagement element is provided with a ratio of the depth of the grip portion (C: mm) and the average fiber diameter (F: μm) of the non-woven fibrous structure. C / F × 1000 × N × (1 / Dc), which is a value weighted by the number of umbrellas (N: number) and the density (Dc: kg / m ³ ) of the engaging portion of the non-woven fiber structure, An engagement assembly kit of 0.10 or more (preferably 0.13 or more).
[Aspect 7]
In the engagement assembly kit according to any one of aspects 1 to 6, the height (A: mm) of the male engagement elements, the number of umbrellas (N: pieces), and the element density (M: pieces / cm ³ ) (A × N × M) / Dc, which is a value obtained by dividing the product by the density (Dc: kg / m ³ ) of the engaging portion of the non-woven fiber structure, is 1.200 or more (preferably 1.300 or more, Engagement assembly kit, eg less than 10.000, preferably less than 8.000).
[Aspect 8]
The engagement assembly kit according to any one of aspects 1 to 7, wherein the apparent density D _{T of the} entire nonwoven fibrous structure and the apparent density Dc of the engagement portion are Dc ≦ D _T. ..
[Aspect 9]
In the engagement assembly kit according to any one of aspects 1 to 8, some of the fibers constituting the non-woven fiber structure are bonded (for example, bonded by an adhesive, bonded by heat fusion between fibers). , Engagement assembly kit.
[Aspect 10]
The engagement assembly kit according to any one of aspects 1 to 9, wherein a part of fibers constituting the non-woven fibrous structure is composed of a heat-adhesive fiber.
[Aspect 11]
In the engagement assembly kit according to any one of aspects 1 to 10, the ratio (mass ratio) of the heat-adhesive fibers (particularly the wet heat-adhesive fibers) and the non-heat-adhesive fibers in the fibers constituting the nonwoven fibrous structure. Where, heat-adhesive fiber / non-heat-adhesive fiber = 100/0 to 20/80 [(eg, 99/1 to 20/80), preferably 100/0 to 50/50 (eg, 95/5 to 50) / 50), more preferably 100/0 to 70/30)].
[Aspect 12]
The engagement assembly kit according to any one of aspects 1 to 11, wherein some of the fibers constituting the non-woven fibrous structure are composed of wet heat heat adhesive fibers.
[Aspect 13]
The engagement assembly kit according to any one of aspects 1 to 12, further comprising a frame.
[Aspect 14]
An engagement assembly comprising the engagement assembly kit according to any one of aspects 1 to 13, which is assembled by engaging a nonwoven fibrous structure with a male surface fastener.
[Aspect 15]
A non-woven fibrous structure for use in the engagement assembly of aspect 14.
[Aspect 16]
The male surface fastener used for the engagement assembly of aspect 14.

Note that any combination of at least two components disclosed in the claims and / or the description and / or the drawings is included in the present invention. In particular, any combination of two or more claims recited in the claims is included in the present invention.

According to the engagement assembly kit of the present invention, by satisfying an appropriate relationship between the male surface fastener and the non-woven fiber structure, even if the non-woven fiber structure having high self-standing property The engagement with the surface fastener can be improved.

The present invention will be understood more clearly from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for illustration and description purposes only, and should not be used to define the scope of the present invention. The scope of the invention is defined by the appended claims. In the accompanying drawings, the same part number in a plurality of drawings indicates the same part. The drawings are not necessarily shown to scale and are exaggerated to illustrate the principles of the invention.
It is a schematic partial perspective view for explaining the engagement assembly kit which concerns on the 1st Embodiment of this invention. It is a schematic partial cross section figure for demonstrating the engagement assembly kit which concerns on the 1st Embodiment of this invention. (A)-(d) is a schematic partial cross section figure for demonstrating the mechanism which the engagement assembly kit of 1st Embodiment engages. (A) And (b) is an enlarged photograph for demonstrating the state which the male type | mold engaging element used in Example 1 hold | maintains the fiber of a nonwoven fabric structure. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing for showing the modification of the male engaging element of this invention. It is a schematic sectional drawing and a schematic projection view of the substantially Y-shaped male engaging element of the present invention. FIG. 3 is a schematic sectional view and a schematic projection view of a mushroom-shaped male engaging element of the present invention. It is a schematic exploded perspective view for explaining an engagement assembly kit provided with a frame which is one embodiment of the present invention. FIG. 8 is a schematic side view showing an assembly structure in which the engagement assembly kit of FIG. 7 is assembled. 4 is an enlarged photograph (75 times) of the side surface of the male engaging element used in Example 1.

The present invention is an engagement assembly kit composed of a male surface fastener in which a plurality of male engagement elements stand on a base material, and a non-woven fiber structure having self-supportability.

The present invention will be described below with reference to the drawings. However, the present invention is not limited to the illustrated form. Further, in each drawing, the same number is assigned to the same item even if the shape is different. FIG. 1 is a schematic partial perspective view for explaining an engagement assembly kit according to a first embodiment, and FIG. 2 is a schematic sectional view for explaining an engagement assembly kit according to the first embodiment. It is a figure.

In the first embodiment, the engagement assembly kit is a combination including a male surface fastener and a non-woven fiber structure. As shown in FIG. 1, the engagement assembly kit 100 includes a male surface fastener 10 and a nonwoven fibrous structure 20. In the male surface fastener 10, a plurality of male engaging elements 11 are erected on the base material 12. The plurality of male engagement elements 11 can be arranged appropriately (for example, randomly), but for example, as shown in FIG. 1, a male engagement element that spreads in the X direction (width direction or left-right direction). The elements 11 are often arranged in rows in the Y direction (depth direction or front-back direction) that is a direction orthogonal to the X direction, and further, the respective rows are often arranged in parallel with each other. Since the male surface fastener 10 is combined with the non-woven fiber structure 20 having a specific relationship with the male surface fastener 10, the male surface fastener 10 and the non-woven fibrous structure 20 are well engaged. Can be combined.

As shown in FIG. 2, in the male surface fastener 10, the male engaging element 11 projects from the base material 12. Further, the male engaging element 11 has a trunk portion 13 standing up from the base material 12, and a trunk portion 13. From the left side to the right side in the drawing.

In the cross-sectional view of the male surface fastener 10, the height of the male engaging element 11 from the surface of the base material 12 is indicated by A, the width of the entire grip portion 14 is D, and the width of the most constricted portion of the trunk portion 13 is D. It is designated E as the width of the cadre.

Further, regarding the male engaging element 11, the pocket depth C of the grip portion 14 is calculated by the following formula, where the width D of the entire grip portion and the width E of the trunk portion 13 are the most constricted portions of the trunk portion. It
Pocket depth C = (width D of gripping portion−width E of trunk portion) / number of gripping portions In the male engaging element shown in FIG. 2, the gripping portion 14 spreads to the left and right with respect to the trunk portion 13, that is, in two directions. Therefore, the number of grips is “2”.
Then, in the male engaging element 11, the pocket depth C of the grip portion 14 has a specific relationship with the average fiber diameter of the fibers forming the non-woven fiber structure 12.
The male engaging elements usually have the same shape in the male surface fastener, but when male engaging elements having different shapes are mixed in the male surface fastener, the male engaging elements of the respective shapes are engaged. A pocket depth is calculated for the element. Then, 80% or more of the total number of male engaging elements in the male surface fastener may have a specific relationship with the average fiber diameter.

On the other hand, the non-woven fibrous structure 20 includes at least an engaging portion 21 having fibers having a specific porosity and a specific average fiber diameter (for example, fibers 22 in the drawing). The engaging portion 21 is arranged to engage with the male engaging element 11 of the male surface fastener 10. The engaging portion 21 has the same thickness as the height A of the male engaging element 11. As a result, the male engaging element 11 can penetrate into the non-woven fibrous structure 20 even through the fibrous structure having the specific porosity of the engaging portion 21, even if it penetrates the most. Is possible.

The non-woven fiber structure 20 may be configured to have the same structure as the engaging portion 21 as a whole. Alternatively, the non-woven fibrous structure 20 includes the engaging portion 21, and includes the first layer 24 having the same structure as the engaging layer and the second layer 25 having a different structure from the engaging portion 21. May be. In this case, the second layer 25 may be a dense fiber layer that is more dense than the first layer 24.

3A to 3D are schematic partial cross-sectional views for explaining a mechanism in which the engagement assembly kit of the first embodiment engages. First, FIG. 3A shows a state in which the male surface fastener 10 comes into contact with the engaging portion 21 of the non-woven fiber structure 20. The nonwoven fibrous structure 20 is composed of a plurality of fibers, and although the fiber cross section is conceptually illustrated by using circles for the sake of description in the drawing, the nonwoven fibrous structure 20 is configured. There are a large number of fibers other than the fibers indicated by circles. The outline of the non-woven fiber structure 20 is indicated by a line.

FIG. 3B shows a state in which the male surface fastener 10 begins to enter the engaging portion 21 of the non-woven fiber structure 20. When the male engaging element 11 of the male surface fastener 10 is pushed toward the engaging portion 21 of the non-woven fibrous structure 20, the engaging portion 21 has a predetermined porosity, so that the male type The grip portion 14 of the engagement element 11 can enter into the engagement portion 21 by utilizing the void existing in the engagement portion 21. Then, the gripping portion 14 starts to compress the fibers 22 existing in the engaging portion 21 in the pushing direction (the arrow Z direction in the drawing).

FIG. 3C shows a state in which the male surface fastener 10 further penetrates into the engaging portion 21 of the non-woven fiber structure 20. When the gripping portion 14 further enters, due to the rigidity of the fiber 22, a compressive force that some fibers of the fibers 22 compressed by the gripping portion 14 in the engaging portion 21 receive from the pushing direction of the gripping portion 14. Begins to repel. Then, the repulsed fibers flow toward the outside of the grip portion 14 so as to avoid the grip portion 14, not in the pushing direction Z from the grip portion 14.

FIG. 3D shows a state in which the male surface fastener 10 is inserted into the engaging portion 21 of the non-woven fiber structure 20. The fibers 22 flowing toward the outside of the grip portion 14 further move by utilizing the repulsive force, and the fibers 22 try to return to the surface layer portion of the engagement portion 21 existing before the intrusion of the grip portion 14. .. Then, some of the fibers 22 are present between the base material 12 of the male surface fastener 10 and the grip portion 14, that is, in the pocket portion 15 of the grip portion 14. Since the pocket portion 15 of the grip portion 14 has a specific relationship with the average fiber diameter of the fibers forming the engaging portion 21, even if the non-woven non-woven fibrous structure 20 has the pocket portion 15, the fibers 22 are formed by the pocket portion 15. Are satisfactorily gripped, and as a result, the male surface fastener 10 and the non-woven fibrous structure 20 can be satisfactorily engaged with each other.

FIG. 4 is an enlarged photograph for explaining a state in which the male engaging element used in Example 1 holds the fibers of the non-woven fiber structure. In (a), the fibers constituting the non-woven fiber structure are not gripped by the grip of the male engaging element, but as shown in (b), the male engaging element is Fiber can be hooked. When the male engaging element is pulled in the direction opposite to the pushing direction (Z direction in FIG. 3), the fiber grasped in the grasping portion serves as a stopper, and the male engaging element is removed from the non-woven fiber structure. Prevent you from leaving.

FIG. 5 is a schematic cross-sectional view showing another example of the male engaging element used in the present invention. 5A is a male engaging element having a substantially Y-shaped cross section illustrated in FIG. 2, FIG. 5B is a male engaging element having an umbrella-shaped cross section, and FIG. 5C is a male engaging element having a substantially T-shaped cross section. Element, FIG. 5D is a male engaging element having a mushroom-shaped cross section, FIG. 5E is a male engaging element having an arrowhead-shaped cross section, and FIG. 5F is a male engaging element having a two-step arrowhead-shaped cross section. 5G shows a male engaging element having a wavy cross section, and FIG. 5H shows a male engaging element having a hook-shaped cross section.

5A to 5H are merely examples, and the shape of the male engaging element used in the present invention is the same as that shown in FIGS. 5A to 5H as long as the fibers of the non-woven fibrous structure can be engaged. Without being limited thereto, the male engaging element used in the present invention also includes male engaging elements having other shapes.

Regarding these male engaging elements, the calculation method of the pocket depth C of each gripping part will be described. First, the male engaging element having the substantially Y-shaped cross section shown in FIG. 5A has the same shape as the male engaging element 11 as described in FIG. In the male engaging element 11, the width E of the trunk portion 13 is represented by the most narrowed portion of the trunk portion 13. Specifically, the waist of the trunk 13 is determined as follows. First, in the cross-sectional view of the male engaging element 11, the surface of the base material 12 with which the male engaging element 11 contacts is referred to as a reference surface 17. The male engaging element 11 has two

gripping portions

14a and 14b which spread to the left and right respectively.

First, regarding the width D of the grip portion 14, the straight lines orthogonal to the reference plane 17 from the widest point of the grip portion in the X direction are defined as

straight lines

141a and 141b for the

grip portions

14a and 14b, respectively. Then, the width D of the grip portion 14 can be calculated as the distance between the straight line 141a and the straight line 141b.

Next, for example, regarding the grip portion 14a on the left side of the drawing, while drawing a straight line orthogonal to the reference plane 17 along the lower contour line of the grip portion 14a, a straight line that is most distant from the straight line 141a and intersects with the contour line. Is a straight line 131a, and a point where the straight line 131a intersects with the contour line is a point 132a.
In this case, it can be determined that the trunk portion 13a and the grip portion 14a are in contact with each other with the point 132a as a boundary.
Also for the right grip portion 14b, the straight line 131b and the intersection point 132b can be determined in the same manner as the grip portion 14a. The width E of the trunk portion 13 can be calculated as the distance between the straight line 131a and the straight line 131b.

Then, the pocket depth C of the pocket portion 15 of the grip portion 14 can be calculated by the following formula.
Pocket depth C = (width of grip D-width of trunk E) / number of grips

Regarding the height of the male engaging element 11, the distance between the reference surface 17 and the point farthest from the reference surface 17 can be calculated as the height A of the male engaging element 11.

Next, in the example of FIG. 5, the male engaging element FIGS. 5A to 5E are similar to the male engaging element 11 described in FIG. It is possible to calculate the size C.

Next, as shown in FIG. 5F, the male engaging element has a two-step arrow-shaped cross section, so that the gripping portions that spread to the right and left are present in two steps, upper and lower. Therefore, the male engaging element FIG. 5F shows that the grip portion 14a that spreads leftward in the upper stage, the grip portion 14b that spreads rightward in the upper stage, the grip portion 14c that spreads leftward in the lower stage, and the grip portion that spreads rightward in the lower stage. The total of 14d has four grips.

The gripping portions 14a to 14d constitute pocket portions 15a to 15d capable of engaging with the fibers 22 of the non-woven fiber structure 20, respectively. In this case, as for the pocket depth C of the grip portion, the first width D1 of the grip portion 14 and the first width E1 of the trunk portion 13 are calculated for the upper row, and the second width D2 of the grip portion 14 is calculated for the lower row. The second width E2 of the trunk portion 13 is calculated.

Specifically, first, for the

upper grip portions

14a and 14b, the

straight lines

141a and 141b and the width D1 of the first grip portion are determined in the same manner as in FIG. 5A.
Then, instead of the

grips

14a and 14b, the straight lines 141c and 141d and the width D2 of the second grips are determined for the

grips

14c and 14d in the same manner as in FIG. 5A.

Further, regarding the first trunk portion between the

upper grip portions

14a and 14b, the

straight lines

131a and 131b and the width E1 of the first trunk portion are determined in the same manner as in FIG. 5A. Next, for the second trunk portion between the

lower grip portions

14c and 14d, the straight line 131c and the straight line 131d and the width E2 of the second trunk portion are determined in the same manner as in FIG. 5A.

Then, in the case of FIG. 5F, the pocket depth C of the pocket portion 15 of the grip portion 14 can be calculated by the following formula.
Pocket depth C = {(first width D1 of grip portion-first width E1 of trunk portion) + (second width D2 of grip portion second width E2 of trunk portion)} / number of grip portions ( Here 4)

Also, in the male engaging element 11 having the wavy cross section shown in FIG. 5G, the necking of the trunk portion 13 is determined as follows. In the cross-sectional view of the male engaging element 11, the male engaging element 11 has only the gripping portion 14 that expands in one direction, so the number of gripping portions is 1, and the gripping portion 14 exists only on the left side of the drawing. is doing.

Regarding the grip portion 14 in the figure, first, in the X direction, a straight line orthogonal to the reference plane 17 from the point where the grip portion spreads most to the left is defined as a straight line 141a. Next, while drawing a straight line orthogonal to the reference surface 17 along the lower contour line of the grip portion 14, a straight line that is farthest from the straight line 141a and intersects with the contour line is a straight line 131a, and the straight line 131a is the contour line. The point that intersects the line is a point 132a. The trunk portion 13a and the grip portion 14 are in contact with each other with a point 132a as a boundary. When a point 132b is a point where a straight line 131c that passes through the point 132a and is orthogonal to the straight line 131a intersects the contour line on the opposite side of the trunk portion 13, the width E of the trunk portion 13 can be calculated as the distance between the

points

132a and 132b.

Next, on the side where the grip portion does not exist, a straight line orthogonal to the reference plane 17 is defined as 141b from the point 132b intersecting with the contour line 13b, and the width D of the grip portion 14 is the distance between the straight line 141a and the straight line 141b. Can be calculated as

Then, the pocket depth C of the pocket portion 15 of the grip portion 14 can be calculated by the following formula.
Pocket depth C = (width D of grip-width E of trunk) / number of grips (1 here)

Further, in the male engagement element 11 having the hook-shaped cross section (substantially J-shaped or fishhook-shaped cross section) shown in FIG. 5H, the necking of the trunk portion 13 is determined as follows. In the cross-sectional view of the male engaging element 11, the male engaging element 11 has only the gripping portion 14 that expands in one direction, so the number of gripping portions is 1, and the gripping portion 14 exists only on the left side of the drawing. is doing.

points

132a and 132b.

As described above, the pocket depth C of the pocket portion can be appropriately calculated according to the shape of the male engaging element, and the pocket depth C and the engagement portion of the non-woven fiber structure are configured. By having a specific relationship with the average fiber diameter of the fibers, the male surface fastener and the non-woven fiber structure can be maintained in a good engagement state. When there are a plurality of male engaging elements having different shapes, the pocket depth C may be understood as an average value of the pocket depth C calculated for 50 randomly selected male engaging elements. ..

The male type fastener and the non-woven fiber structure will be described in more detail below.

(Male type surface fastener)
There are roughly two types of male surface fasteners: male molded surface fasteners and male woven surface fasteners. In the male molded surface fastener, a base material is a plastic substrate, and a large number of male engaging elements are erected on the plastic substrate. On the other hand, in the male woven surface fastener, the base material is a woven or knitted material, and a large number of male engagement elements are provided upright on the surface of the woven or knitted material. These male surface fasteners can be manufactured by a known or conventional method as long as they can satisfy a specific relationship with the non-woven fiber structure.

For example, in a male molded surface fastener, a tape-shaped material having a predetermined shape is molded into a plurality of rows on a plastic substrate. Next, the obtained tape-like material is cut into the root at predetermined intervals. Then, by stretching the plastic substrate at a predetermined ratio so that the cuts spread, for example, as shown in FIG. 2, a plurality of plate-shaped male engaging elements are arranged in a row from one tape-shaped object. It is possible to obtain a lined male molded surface fastener.

On the other hand, a male woven surface fastener has a predetermined shape by implanting a monofilament as an engaging element material on a base cloth made of a woven or knitted fabric and then appropriately heating and / or cutting the implanted monofilament. It is possible to obtain a male surface fastener having an engaging element having a mushroom-shaped, arrowhead-shaped, or hook-shaped tip (for example, a tip portion).

The shape of the male engaging element erected on the male surface fastener is not particularly limited as long as the fibers in the engaging portion of the non-woven fiber structure can be engaged, and male engaging elements of various shapes are used. can do. The male engaging element may have a two-dimensional shape such as a substantially plate shape, or may have a three-dimensional shape.

The two-dimensional shape means a shape in which a projected view of the male engaging element with respect to the reference surface 17 has a longitudinal shape (for example, longitudinal / short side = 3 or more as an aspect ratio). Further, the male engagement element has a cross section in a plane which is orthogonal to the reference plane 17 and parallel to the longitudinal direction, for example, a substantially Y-shaped cross section, an umbrella-shaped cross section, a substantially T-shaped cross section, a mushroom-shaped cross section, an arrowhead shape It may have a cross section, a two-step arrowhead-shaped cross section, a wavy cross section, a hook-shaped cross section, or the like.

The three-dimensional shape means a shape in which the projected view of the male engaging element with respect to the reference surface 17 is a non-longitudinal shape (for example, a circle, a polygon, an irregular shape, etc.). Also in this case, the male engaging element has, for example, a substantially Y-shaped cross section, an umbrella-shaped cross section, a substantially T-shaped cross section, a mushroom-shaped cross section, an arrowhead-shaped cross section, a two-step arrowhead-shaped cross section, in a cross section orthogonal to the reference plane 17. It may have a sectional shape such as a wavy section or a hook-shaped section. The plurality of male engaging elements in the male surface fastener may have a single shape or a combination of a plurality of shapes.

A typical example of the two-dimensional shape is a male engaging element having a plate-shaped substantially Y-shaped cross section (upper figure) shown in FIG. 6A. Derived from the plate-like shape, the projection view of the male engaging element with respect to the reference surface 17 (lower view) shows a rectangular shape having a longitudinal direction in the left-right direction (X direction) in the drawing. The depth of the male engaging element means the width in the direction (Y direction) orthogonal to the longitudinal direction. That is, in FIG. 6A, the male engaging element 11 can measure the height A, the depth B, the width E of the trunk portion 13, the width D of the grip portion 14, and the depth C of the pocket portion 15 of the grip portion 14. It is prepared as a factor.

On the other hand, the mushroom-shaped male engaging element shown in FIG. 6B is a male engaging element having a mushroom-shaped cross section (upper figure). Derived from the mushroom-shaped shape, the projected view of the male engaging element with respect to the reference surface 17 (below) shows a circular shape. In this case, the depth of the male engaging element means the width in the direction (Y direction) orthogonal to the lateral direction (X direction) in the drawing. That is, in FIG. 6B, the male engaging element 11 can measure the height A, the depth B, the width E of the trunk portion 13, the width D of the grip portion 14, and the depth C of the pocket portion 15 of the grip portion 14. It is prepared as a factor.

From the viewpoint of engaging the fibers forming the engaging portion of the non-woven fibrous structure (hereinafter, may be simply referred to as engaging portion fibers), in the male engaging element, the depth of the gripping portion (C: mm) is twice or more as a ratio (C / F × 1000) of the average fiber diameter (F: μm) of the engaging part fibers. This makes it possible to satisfactorily hold the fibers of the engaging portion in the grip portion of the male engaging element. Further, from the viewpoint that the gripping part holds the engaging part fiber and the engaging part fiber satisfactorily wraps around the gripping part, the ratio (C / F × 1000) is preferably 2 to 100 times, and more preferably 2 It may be 0.5 to 80 times, more preferably 3 to 70 times.

Further, since the engaging portion fibers satisfactorily wrap around the grasping portion when the grasping portion enters, the width D of the grasping portion may be, for example, 4 to 200 times the average fiber diameter of the engaging portion fibers. Good, preferably 6 to 100 times, more preferably 8 to 50 times.

From the viewpoint of increasing the rigidity of the male engaging element to facilitate entry, the width E of the trunk of the male engaging element may be, for example, 100 μm or more, and preferably 150 μm or more. On the other hand, the width E may be 1500 μm or less, preferably 1000 μm or less, from the viewpoint of reducing the resistance received from the non-woven fiber structure when the male engaging element enters.

The height A of the male engaging element may be, for example, 0.2 to 5.0 mm, and is preferably 0. It may be 3 to 4.0 mm, more preferably 0.4 to 3.0 mm. In particular, in the present invention, in order to properly combine the male engaging element and the non-woven fibrous structure, even if the male engaging element is small, the non-woven fibrous structure having self-supporting property is engaged. Can be held. In such a case, the height A of the male engaging element may be about 0.5-1.5 mm. Further, in the male engaging element, the height A and the width E of the trunk may be about A / E = 1 to 5.

Further, in order to promote the engagement portion fibers to go around the grip portion, it is preferable that the tip of the grip portion of the male engaging element is directed to the base material side. For example, it can be said that all the male engaging elements shown in FIGS. 5A to 5C and 5E to 5H have the tips of the gripping portions facing the base material side. Also in FIG. 5D, the tip of the grip portion may be directed to the base material side, if necessary.

Further, when focusing on the entire male surface fastener, it is possible to set appropriately according to the individual size of the male engaging element, from the viewpoint of improving the engagement, the male surface fastener, For example, about 10 to 200, preferably about 15 to 180, more preferably about 20 to 150 male engaging elements may be provided per square centimeter on the surface of the base material.

For example, in the present invention, the ratio between the pocket depth (C: mm) of the grip portion of the male engaging element and the average fiber diameter (F: μm) of the non-woven fiber structure is determined by the number of umbrellas of the male engaging element. (N: number) and the engaging portion density (Dc: kg / m ³ ) of the non-woven fiber structure, which is a value weighted by C / F × 1000 × N × (1 / Dc), is, for example, 0. It may be 10 or more, more preferably 0.13 or more. The upper limit is not particularly limited, but may be 5 or less, for example.
A larger ratio of the pocket depth (C) of the grip portion of the male engaging element to the average fiber diameter (F) of the non-woven fibrous structure allows the grip portion to hold fibers, and The larger the number of umbrellas, the higher the engagement of the male engagement element. On the other hand, it is preferable that the density of the engaging portions of the non-woven fibrous structure is low from the viewpoint of facilitating penetration of the male engaging elements.

In addition, the male surface fastener has a height (A: mm) of male engaging elements, a number of umbrellas (N :), and an element density (M) from the viewpoint of improving engagement maintainability after being engaged. : Pieces / cm ³ ) is high, the non-woven fiber structure easily penetrates into the non-woven fibrous structure and is then easily retained by the non-woven fibrous structure. The lower the / m ³ ) is, the easier it is for the engaging element to enter.
Therefore, between the male surface fastener and the non-woven fiber structure to be combined, the above A × N × M / Dc may be, for example, 1.200 or more, and preferably 1.300 or more. May be. Although the upper limit is not particularly limited, it may be 10.000 or less, and preferably 8000 or less.

Further, in the present invention, by making the product of the density of the engaging portion of the non-woven fiber structure and the width of the trunk portion of the male engaging element within a predetermined range, the ease of engagement and the retention of the engagement are maintained. Can be improved. When the width of the trunk portion of the male engaging element is large, the density of the engaging portion of the non-woven fibrous structure is lowered to promote the penetration of the male engaging element, and the holding force after that is increased, while When the density of the engaging portions of the non-woven fiber structure is high, it is possible to reduce the width of the trunk portion of the male engaging element to promote the penetration of the male engaging element and to improve the engaging property. It is possible.

In this case, the product of the density of the engaging portions of the non-woven fiber structure and the width of the trunk portion of the male engaging element may be, for example, about 20 to 29, preferably about 21 to 28, and more preferably. It may be about 22 to 27.

The material for forming the male surface fastener is not particularly limited as long as it can form a predetermined shape, but a resin material is preferably used from the viewpoint of moldability and handleability. The base material and the male engaging element may be formed of different resins, but from the viewpoint of productivity, they are preferably formed of the same resin.

The resin used is not particularly limited, and examples thereof include polyolefin resins such as polyethylene and polypropylene, polyamide resins such as polyamide 6 and polyamide 66, polyethylene terephthalate, polybutylene terephthalate, polyester resins such as polylactic acid, and polyvinyl chloride. Examples of the resin include styrene resin, styrene resin, acrylic resin, and thermoplastic elastomer. You may use these resins individually or in combination of 2 or more types. The thermoplastic elastomer is a copolymer composed of a hard segment and a soft segment. Specifically, depending on the type of the hard segment, a styrene elastomer, an olefin elastomer, a vinyl chloride elastomer, a urethane elastomer, an ester. Examples of such elastomers include amide elastomers. Of these, the resin used is preferably at least one selected from a mixture of a thermoplastic elastomer (particularly an olefin elastomer) and a polyolefin resin, a polyamide resin, and a polyester resin.

(Nonwoven fiber structure)
The non-woven fibrous structure is not particularly limited as long as it has an engaging portion having a predetermined porosity and has self-sustaining property, and within a range satisfying the relationship with the male engaging element of the male surface fastener. Any non-woven fibrous structure can be used.

The non-woven fibrous structure is not particularly limited as long as it has self-supporting property, and may be formed of any of wet non-woven fabric, dry non-woven fabric and spun directly-bonded non-woven fabric. It may be fixed by fusion treatment (such as hot embossing), adhesion with a binder component, or fusion treatment. Furthermore, these non-woven fabrics may constitute the non-woven fiber structure alone, or a plurality of types of non-woven fabrics may be combined to form the non-woven fiber structure. In the present specification, the self-supporting property can be evaluated by the bending resistance of the non-woven fiber structure described in Examples described later. For example, if the non-woven fiber structure has a bending resistance in at least one direction of 10 cm or more (preferably 11 cm or more, more preferably 12 cm or more, particularly preferably 14 cm or more) in the 45 ° cantilever method according to JIS L-1906, It can be said that the non-woven fibrous structure is self-supporting. The higher the bending resistance, the better the independence.

Preferred non-woven fiber structures include, for example, non-woven fiber structures composed of various dry non-woven fabrics such as chemical bonds, thermal bonds, needle punches, spunlaces (hydroentanglement), stitch bonds, air-laids, and the like. Further, a non-woven fiber structure obtained by further fixing by partial heat-pressure fusion treatment (such as hot embossing) or adhesion or fusion treatment with a binder component can be used.

The non-woven fiber structure is provided with at least an engaging portion for engaging with the male engaging element of the male surface fastener. The whole non-woven fiber structure may be formed by the engaging portion, or may be formed by combining the engaging portion and another layer. The other layer may be a layer having a higher porosity than the engaging portion or a layer having a lower porosity than the engaging portion. From the viewpoint of improving the self-supporting property, the non-woven fiber structure preferably includes at least an engaging portion and a layer having a lower porosity than the engaging portion.

The fibers constituting the non-woven fiber structure (particularly the engaging portion) may be either non-composite fibers or composite fibers. Examples of the conjugate fiber include core-sheath type, sea-island type, side-by-side type or multi-layer laminating type, radial laminating type, random conjugate type and the like. Alternatively, the fibers constituting the non-woven fabric may be coating fibers in which the surface of the non-composite fibers is coated with another type of resin. You may use these fibers individually or in combination of 2 or more types. In the case of a composite fiber or a coating fiber, for example, the ratio of the first resin and the second resin is 90/10 to 10/90, preferably 80/20 to 15/85, more preferably 60/40 to 20. It may be about / 80.

The fibers constituting the non-woven fabric are not particularly limited as long as they form a non-woven fiber structure, and include natural fibers (animal fibers such as wool, plant fibers such as hemp), semi-synthetic fibers (eg rayon fibers, acetate). Cellulosic fibers such as fibers) and synthetic fibers may be used. Preferably, synthetic fibers are used, and examples of the resin that constitutes the synthetic fibers include polyolefin resins, (meth) acrylic resins, polyvinyl alcohol resins, vinyl chloride resins, styrene resins, polyester resins, and polyamide resins. Examples thereof include resins, polycarbonate-based resins, polyurethane-based resins and thermoplastic elastomers. Among these resins, polyester resins, polyamide resins, thermoplastic elastomers and the like are widely used.

Examples of the polyester resin include aromatic polyester resins such as poly C _2-4 alkylene arylate resins (polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), and particularly polyethylene such as PET. A terephthalate resin is preferred. The polyethylene terephthalate-based resin is, in addition to the ethylene terephthalate unit, other dicarboxylic acids (eg, isophthalic acid, naphthalene-2,6-dicarboxylic acid, phthalic acid, 4,4′-diphenyldicarboxylic acid, bis (carboxyphenyl) ethane. , 5-sodium sulfoisophthalic acid) and diols (eg, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, cyclohexane-1,4-dimethanol, Units composed of polyethylene glycol, polytetramethylene glycol, etc.) may be contained in a proportion of about 20 mol% or less.

Examples of the polyamide resin include aliphatic polyamides such as polyamide 6, polyamide 66, polyamide 610, polyamide 10, polyamide 12, polyamide 6-12 and copolymers thereof, and semi-synthesized aromatic dicarboxylic acids and aliphatic diamines. Aromatic polyamide and the like are preferable. These polyamide-based resins may also contain other copolymerizable units.

The non-woven fibrous structure (or fiber) is further added with conventional additives such as stabilizers (heat stabilizers such as copper compounds, UV absorbers, light stabilizers, antioxidants, etc.), dispersants and thickeners. Agents, fine particles, colorants, antistatic agents, flame retardants, plasticizers, lubricants, crystallization rate retarders, lubricants, antibacterial agents, insect / anti-mite agents, antifungal agents, matting agents, heat storage agents, fragrances, fluorescent agents It may contain a whitening agent, a wetting agent and the like. These additives may be used alone or in combination of two or more. These additives may be supported on the surface of the structure or may be contained in the fiber.

Further, in the non-woven fiber structure, for example, inter-fiber bond points can be formed by fiber entanglement. As the interfiber bonding point, either fiber entanglement or fiber adhesion may be selected, or both may be selected. In the case of fiber entanglement, fibers can be physically bonded by entanglement to form an interfiber bonding point. Further, in the case of fiber bonding, fibers can be bonded by bonding (including fusion bonding) to form an interfiber bonding point.

In particular, in the present invention, among the above-mentioned non-woven fiber structures, the binder component (particularly, the polyester-based, polyamide-based, polyolefin-based, polyvinyl alcohol-based heat-adhesive resin-based heat-adhesive fiber A fibrous structure fixed by fusion bonding of (binder fibers) is preferable.

Nonwoven fibrous structures containing heat-bondable fibers (particularly wet heat-bonded fibers) not only have sufficient voids between the fibers to accommodate the male engaging elements, but also form a number of strong interfiber bond points. Has been done. Therefore, the network of fibers is strong, and the male engaging element of the male surface fastener can be strongly held. Moreover, even if the density is small and the thickness is thin, it can have appropriate rigidity. Further, it has an effect of high light transmittance. Furthermore, since the non-woven fiber structure containing the wet heat adhesive fiber has good dimensional stability and weather resistance, it can be used for a long period of time.

When the non-woven fibrous structure contains heat-adhesive fibers (particularly wet-heat adhering fibers), non-heat-bonding with the heat-adhesive fibers (particularly wet-heat adhering fibers) from the viewpoint of improving the handleability of the non-woven fibrous structure The ratio (mass ratio) to the heat-resistant fiber is thermal adhesive fiber / non-heat adhesive fiber = 100/0 to 20/80 (eg 99/1 to 20/80), preferably 100/0 to 50/50 (For example, 95/5 to 50/50), and more preferably about 100/0 to 70/30.
The non-heat-adhesive fiber can be selected according to the desired properties, and when it is combined with, for example, a semi-synthetic fiber such as rayon, a fiber structure having a relatively high density and high mechanical properties can be obtained.

In the present invention, the non-woven fiber structure in which the fibers are fixed by fusion bonding of the wet heat adhesive fibers (hereinafter, may be referred to as “nonwoven fiber structure containing wet heat adhesive fibers”) is high temperature (overheat or Since heating and steam are used for bonding, a large number of bonding points are formed in the surface direction or the thickness direction, and high strength can be secured while maintaining the fiber structure, which is particularly preferable.

In this non-woven fiber structure, the wet heat adhesive fiber is composed of at least a wet heat adhesive resin. The wet heat adhesive resin may be one that can flow or easily deform to exhibit an adhesive function at a temperature that can be easily realized by high temperature steam. Specifically, a thermoplastic resin that is softened by hot water (eg, about 80 to 120 ° C., particularly about 95 to 100 ° C.) and is capable of self-adhesion or adhesion to other fibers, such as ethylene-vinyl alcohol copolymer. Examples of the vinyl alcohol-based polymer, polylactic acid-based resin such as polylactic acid, and (meth) acrylic-based copolymer containing a (meth) acrylamide unit. Further, it may be an elastomer (for example, a polyolefin-based elastomer, a polyester-based elastomer, a polyamide-based elastomer, a polyurethane-based elastomer, a styrene-based elastomer, etc.) that can be easily flown or deformed by high-temperature steam to adhere. These wet heat adhesive resins can be used alone or in combination of two or more kinds. Of these, vinyl alcohol-based polymers containing α-C _2-10 olefin units such as ethylene and propylene, especially ethylene-vinyl alcohol-based copolymers are particularly preferable.

In the ethylene-vinyl alcohol-based copolymer, the content of ethylene units (copolymerization ratio) is, for example, 5 to 65 mol% (eg 10 to 65 mol%), preferably 20 to 55 mol%, and more preferably It is about 30 to 50 mol%. When the ethylene unit is in this range, it has a unique property that it has wet heat adhesiveness but does not have hot water solubility. If the proportion of ethylene units is too small, the ethylene-vinyl alcohol-based copolymer easily swells or gels with low-temperature steam (water), and the shape is likely to change even after being wet with water once. On the other hand, if the proportion of ethylene units is too large, the hygroscopicity decreases and fiber fusion due to wet heat becomes difficult to develop, so that it becomes difficult to secure practical strength. When the proportion of ethylene units is in the range of 30 to 50 mol%, the processability into a sheet or plate is particularly excellent.

The degree of saponification of vinyl alcohol units in the ethylene-vinyl alcohol copolymer is, for example, about 90 to 99.99 mol%, preferably 95 to 99.98 mol%, more preferably 96 to 99.97 mol%. %. If the degree of saponification is too small, the thermal stability will decrease, and the thermal decomposition and gelation will decrease the stability. On the other hand, if the degree of saponification is too large, it becomes difficult to manufacture the fiber itself.

The viscosity average degree of polymerization of the ethylene-vinyl alcohol copolymer can be selected as necessary, but is, for example, 200 to 2500, preferably 300 to 2000, and more preferably 400 to 1500. When the polymerization degree is in this range, the spinnability and the wet heat adhesiveness are well balanced.

The cross-sectional shape of the wet heat adhesive fiber (cross-sectional shape perpendicular to the length direction of the fiber) is limited to the general solid cross-sectional shape such as a round cross section or an irregular cross section [flat, elliptical, polygonal, etc.] However, it may have a hollow cross-section or the like.

The wet heat adhesive fiber is preferably a composite fiber composed of a plurality of resins including at least a wet heat adhesive resin. From the viewpoint of adhesiveness, the composite fiber preferably has a wet heat adhesive resin on at least a part of the fiber surface, and in particular, has a wet heat adhesive resin continuous in the length direction on the fiber surface. preferable. The wet heat adhesive resin has a coverage of, for example, 50% or more, preferably 80% or more, and more preferably 90% or more. From the viewpoint of adhesiveness, the moist-heat adhesive fiber has a core-sheath structure in which the wet-heat adhesive resin covers the entire surface of the fiber (that is, a core-sheath structure in which the sheath portion is composed of the wet-heat adhesive resin). Is particularly preferable.

When the wet-heat adhesive fiber is a composite fiber, the wet-heat adhesive resin may be combined with each other, or the wet-heat adhesive resin and the non-wet-heat adhesive resin may be combined. As the non-wet heat adhesive resin, water-insoluble or hydrophobic resin, for example, polyolefin resin, (meth) acrylic resin, vinyl chloride resin, styrene resin, polyester resin, polyamide resin, polycarbonate resin, Examples thereof include polyurethane resins and thermoplastic elastomers. These non-wet heat adhesive resins can be used alone or in combination of two or more.

Among these non-wet heat adhesive resins, from the viewpoint of heat resistance and dimensional stability, resins having a melting point higher than that of the wet heat adhesive resins (especially ethylene-vinyl alcohol copolymers), such as polypropylene resins and polyester resins. Resins and polyamide-based resins, particularly polyester-based resins and polyamide-based resins, are preferable from the viewpoint of excellent balance of heat resistance and fiber forming properties.

In the case of a composite fiber composed of a wet heat adhesive resin and a non-wet heat adhesive resin (fiber-forming polymer), the ratio (mass ratio) of both can be selected according to the structure (for example, core-sheath structure). From the viewpoint of achieving both fiber strength and wet heat adhesiveness, for example, wet heat adhesive resin / non-wet heat adhesive resin = 90/10 to 10/90, preferably 80/20 to 15/85, more preferably 60/40 It may be about 20/80.

The fibers constituting the non-woven fibrous structure (particularly the engaging portion) can be appropriately determined in accordance with the manufacturing method of the non-woven fibrous structure such as the fiber length and the presence or absence of crimp. The fibers constituting the woven fiber structure are preferably short fibers from the viewpoint of bulkiness, and the average fiber length thereof can be selected from the range of about 5 to 100 mm, preferably 10 to 80 mm, and more preferably May be about 15 to 75 mm. When the average fiber length is in this range, the fibers are sufficiently entangled with each other, so that the mechanical strength of the fiber structure is improved.

The crimping rate of the fibers constituting the non-woven fiber structure (particularly the engaging portion) is, for example, 1 to 50%, preferably 3 to 40%, and more preferably 5 to 30%. The number of crimps is, for example, 1 to 100 pieces / 25 mm, preferably 5 to 50 pieces / 25 mm, and more preferably about 10 to 30 pieces / 25 mm. Here, the crimping rate and the crimping number are values measured by the method described in Examples described later.

The non-woven fibrous structure (or non-woven fabric) may be a dry non-woven fabric obtained by a dry process or a wet non-woven fabric obtained by a wet process, but is preferably a dry non-woven fabric. In the dry method, a web (semi-random web, parallel web, etc.) is manufactured, and the obtained web is chemically bonded (chemical bond), thermal bond (thermal bond), or mechanical bond (needle punch, hydroentanglement, Stitch bond) is used to bond them. In the dry method, from the viewpoint that the structure can be made uniform, a card web (for example, a parallel web) in which fibers are unwound and formed into a sheet by the card method is preferable.

Specifically, using a web, for chemical bonding, an adhesive is applied to the web by a dipping method, a coating method, a foam impregnation method, a spray method, etc., and the fibers in the web are bonded by the adhesive. To obtain an integrated non-woven fiber structure.

In the case of thermal bonding (thermal bond), the web contains heat-bonding fibers, and the heat-bonding fibers are melted by heating with a heating roll, hot air, heating steam, etc., and the fibers in the web are integrated. It can be made into a non-woven fibrous structure.

From the viewpoint of achieving both a predetermined porosity and self-supporting property, it is preferable that the engaging portion of the non-woven fiber structure is composed of a chemical bond nonwoven fabric, a thermal bond nonwoven fabric, a needle punched nonwoven fabric, or the like. In particular, a non-woven fiber structure in which some of the fibers forming the engaging portion are bonded is preferable. In such a case, it is preferable to use a chemical bond nonwoven fabric in which some of the fibers are bonded by an adhesive or a thermal bond nonwoven fabric in which some of the fibers are bonded by heat fusion in the engaging portion.

In particular, the non-woven fibrous structure (engagement portion) containing the wet heat adhesive fiber can be obtained as a thermal bond nonwoven fabric, and is preferably a web (for example, a web obtained by using short fibers having a predetermined length). , Semi-random webs, parallel webs, etc.), high temperature steam at a temperature of about 70 to 150 ° C. (particularly 80 to 120 ° C.) and a pressure of about 0.1 to 2 MPa (particularly preferably 0.2 to 1.5 MPa) It can be obtained by the method of injecting.

The nonwoven fibrous structure is preferably composed of a thermal bond nonwoven fabric containing a wet heat adhesive fiber (hereinafter sometimes referred to as a wet heat adhesive thermal bond nonwoven fabric), in which case the entire nonwoven fibrous structure is uniform. It may be formed of a wet-heat adhesive thermal bond non-woven fabric, or a non-woven fibrous structure may be formed by combining a wet-heat adhesive thermal bond non-woven fabric with another non-woven fabric, preferably a plurality of wet-heat adhesive properties. A combination of thermal bond nonwoven fabrics (for example, a plurality of wet-heat adhesive thermal bond nonwoven fabrics having different structures (porosity, fiber composition, etc.)) may be combined.

Since the wet-heat adhesive thermal bond nonwoven fabric contains the wet-heat adhesive fiber, even different wet-heat adhesive thermal bond nonwoven fabrics can be thermally bonded by heating steam and can be easily composited. It is possible to obtain a non-woven fibrous structure including the wet-heat adhesive thermal bond nonwoven fabric.

The non-woven fiber structure used in the present invention is provided with an engaging portion on the surface that engages with the male surface fastener. From the viewpoint of ensuring a space into which the male engagement element can satisfactorily enter, the engagement portion has a porosity of 80 to 98.5%, preferably 85 to 98%, more preferably 88 to 97. It may be 5%.

Further, the engaging portion of the non-woven fiber structure has, for example, an apparent density of the engaging portion (hereinafter, may be referred to as engaging portion density) of 30 to 30 from the viewpoint of increasing the self-supporting property and ensuring a void. It may be 300 kg / m ³ , preferably 40 to 280 kg / m ³ , and more preferably 50 to 250 kg / m ³ .

The average fiber diameter of the fibers forming the engaging portion may be 1 to 50 μm, preferably 10 to 40 μm, and more preferably 15 to 30 μm from the viewpoint of giving rigidity to the fibers. Further, the average fiber length of the fibers forming the engaging portion may be, for example, 15 to 150 mm, preferably 20 to 130 mm, and more preferably 25 to 100 mm.

From the viewpoint of having self-supporting property, the non-woven fiber structure may have a bending resistance of at least one direction of 10 cm or more in the 45 ° cantilever method according to JIS L-1906, preferably in at least one direction. It may be 11 cm or more, more preferably 12 cm or more. The upper limit of the bending resistance is not particularly limited, but may be 20 cm or less.

The non-woven fibrous structure may have a multi-layered structure as long as it has self-supporting property as long as it has the engaging property in the engaging part. In the multilayer structure, for example, a layer having a high porosity and a layer having a low porosity can be freely combined. Therefore, the apparent density (sometimes referred to as the overall density) of the entire nonwoven fibrous structure may be 15 to 500 kg / m ³ , preferably 20 to 400 kg / m ³ , and more preferably 30 to 300 kg / m ^3. It may be m ³ .

For example, the non-woven fibrous structure overall density D _T and the engagement portion density Dc may satisfy the following relationship: Dc ≦ D _T.

Further, the non-woven fiber structure may be appropriately set in thickness, basis weight, air permeability, translucency, thermal conductivity, etc., depending on the application. The preferable thickness may be, for example, 0.3 mm to 20 mm, preferably 1.0 to 18 mm, and more preferably 2.0 to 15 mm. The thickness is a value measured by the method described in Examples below.

The basis weight of the non-woven fiber structure may be, for example, 100 to 1000 g / m ² , preferably 120 to 1000 g / m ² , and more preferably 140 to 1000 g / m ² . The basis weight is a value measured by the method described in Examples below.

The air permeability of the nonwoven fibrous structure can be appropriately set according to the purpose, and may be, for example, 50 to 300 cm ³ / cm ² / s, preferably 60 to 280 cm ³ / cm ² / s, It may be preferably 70 to 250 cm ³ / cm ² / s. The air permeability is a value measured by the method described in Examples below.

The visible light transmittance of the non-woven fiber structure can be appropriately set according to the purpose, and may be, for example, 0.5% or more, preferably 1.0% or more, more preferably 4.0. % Or more, more preferably 10% or more. The visible light transmittance is a value measured by the method described in Examples below. The upper limit of the visible light transmittance is not particularly limited, but may be 22% or less, for example.

The thermal conductivity of the non-woven fiber structure can be appropriately set according to the purpose, and may be, for example, 0.050 W / m · K or less, preferably 0.048 W / m · K or less, It may be preferably 0.046 W / m · K or less. The thermal conductivity is a value measured by the method described in Examples below.

In particular, the translucent heat-shielding sheet according to the present invention is a sheet composed only of the above-mentioned fiber structure, and the sheet which is the above-mentioned fiber structure has a density (weight per unit area) of 0.05 to 0.2 g / cm ^3. By setting the thickness to 50 to 2000 g / m ² and the thickness to 10 to 1 mm), the sheet can have a visible light transmittance of 10% or more and a thermal conductivity of 0.045 W / m · K or less. The density, basis weight, and thickness of this sheet may or may not be uniform over the entire sheet.

In the engagement assembly kit of the present invention, the engagement between the male surface fastener and the non-woven fiber structure is good even though the non-woven fiber structure is self-supporting. For example, the engagement force, the peel strength between the male surface fastener and the non-woven fiber structure, for example, may also be 1.4 N / cm ² or more, preferably 1.5 N / cm ² or more, more It may be preferably 1.6 N / cm ² or more. From the viewpoint of repetitive engagement, the peel strength may be, for example, 7.0 N / cm ² or less, or 5.0 N / cm ² or less. The shear strength between the male surface fastener and the non-woven fibrous structure may be, for example, 6.4 N / cm ² or more, and preferably 6.5 N / cm ² or more. From the viewpoint of repetitive engagement, the shear strength may be, for example, 20 N / cm ² or less, or 15 N / cm ² or less.
The peel strength and the shear strength are values measured by the methods described in Examples below.

Further, in the engagement assembly kit of the present invention, since the non-woven fiber structure has self-supporting property, it is easy to handle during construction, and the grip area where the male surface fastener and the non-woven fiber structure contact each other is small. Both can be assembled and integrated. For example, the ratio (cm ² / g) of the gripping area ratio (cm ² / m ² ) in the non-woven fiber structure to the basis weight (g / m ² ) of the whole non-woven fiber structure is, for example, 1 to 20000. May be, preferably 10 to 10000, and more preferably 100 to 5000.
Here, the gripping area ratio represents an area (cm ² ) per unit area (m ² ) where the male surface fastener is provided in the non-woven fiber structure.

In the engagement assembly kit of the present invention, further, by setting the basis weight of the non-woven fiber structure capable of holding the male engaging element per unit area in the male surface fastener within a predetermined range, the non-woven fibrous structure is formed. In addition to being able to be held, it is possible to reduce damage to the nonwoven fibrous structure that occurs when the nonwoven fibrous structure is removed.

For example, the ratio (g / mm ³ ) between the basis weight (g / m ² ) of the entire nonwoven fiber structure and the engagement element volume ratio (mm ³ / m ² ) per unit area in the male surface fastener is: It can be used as an index showing how much the unit weight of the engaging element can be held per unit area. For example, the former / the latter may be about 30 to 250, preferably about 40 to 200. And more preferably about 60 to 150.

For example, if this value is too low, it will be difficult to repeatedly engage the non-woven fibrous structure, while if this value is too high, the non-woven fibrous structure tends not to engage, Even if they are combined, the weight of the non-woven fiber structure tends to be too heavy for the engaging element.
Here, the engaging element volume per unit area in the male surface fastener represents the engaging element volume (mm ³ ) per unit area (m ² ) in the male surface fastener.

In the engagement assembly kit of the present invention, the engagement assembly can be produced by assembling and integrating the male surface fastener and the non-woven fiber structure. The engagement assembly should be usefully used in a wide range of applications as a building material, heat insulating material, decorative material, cover material, humidity control material, sound absorbing material (sound insulation wall material, vehicle sound insulation material, etc.), cushioning material, partitioning material, etc. You can

Furthermore, the engagement assembly kit of the present invention may be further combined with a frame body as the second embodiment. In the second embodiment, the engagement assembly kit is a combination including a male surface fastener, a non-woven fiber structure, and a frame body. For example, FIG. 7 is a schematic exploded perspective view for explaining an engagement assembly kit including a frame body according to the second embodiment of the present invention. As shown in FIG. 7, the engagement assembly kit 200 includes a male surface fastener 10, a non-woven fiber structure 20, and a frame 30. In this case, the male surface fastener 10 is attached to and integrated with the frame body 30, and the non-woven fiber structure 20 is attached via the male surface fastener 10 on the frame body 30. It is possible to assemble as.

In the engagement assembly kit 200 shown in FIG. 7, the male surface fastener 10 has at least one surface (front surface in the drawing) of the frame body 30 at each end of the frame body 30 in the left-right direction and / or the up-down direction. It is fixed by a suitable fixing means (not shown) such as an adhesive. Then, the non-woven fiber structure 20 can be engaged with the male surface fastener 10 fixed to the frame body 30.
8 is a schematic side view showing an assembly structure in which the engagement assembly kit of FIG. 7 is assembled. In the assembly structure 300, the non-woven fiber structure 20 and the frame 30 are integrated via a male surface fastener (not shown). Such an engagement assembly 300 can be used as, for example, a wall panel or the like.

The frame does not necessarily have to form a plane. For example, it may have a three-dimensional shape such as a cylindrical shape or a prismatic shape. Further, in the frame body, the surface on which the non-woven fiber structure is installed does not have to be the entire surface, and an opening is provided in at least a part of the frame, and the non-woven fiber structure is installed in the opening. Good. Since the non-woven fibrous structure is self-supporting, the engagement assembly obtained by assembling the engagement assembly kit including the frame body can be used for various applications depending on the type of the frame body. For example, such an engagement assembly may include Japanese sliding doors, doors, sliding doors, movable or fixed partitions, indoor openings, folding screens, sound absorbing panels, ceilings, walls, floors, lighting fixtures, and the like.

In addition, the male surface fastener and the non-woven fiber structure (the frame body, if necessary) described above can each be independently distributed as the material (for example, a replacement member) for the engagement assembly described above. ..

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the examples. In addition, in the following Examples and Comparative Examples, various physical properties were measured by the following methods.

[Average fiber diameter (μm)]
The surface of the engaging portion of the non-woven fiber structure was observed using a scanning electron microscope. The fiber diameters of 100 randomly selected fibers were measured from electron micrographs, and the number average fiber diameter was determined and used as the average fiber diameter of the fibers.

[Basis weight (g / m ² )]
The basis weight (g / m ² ) of the non-woven fiber structure was measured according to 6.1 of JIS L 1913 "General nonwoven fabric test method".

[Thickness (mm), apparent density (kg / m ³ )]
The thickness (mm) of the non-woven fiber structure is measured in accordance with 6.2 of JIS L 1913 "General nonwoven fabric test method", and the apparent density (kg / m ³ ) is calculated from this value and the weight value. did. The apparent density of the whole non-woven fiber structure was evaluated as the overall density, and the apparent density of the engaging portion of the non-woven fiber structure was evaluated as the engaging portion density.

[Porosity (%)]
The porosity was calculated as a gap other than fibers per unit volume. Specifically, the apparent density was multiplied by the specific gravity of the fiber to calculate the space occupied by the fiber per unit volume, and the porosity per unit volume was calculated by subtracting the ratio of the space from the unit volume.

[Bending flexibility (cm)]
Evaluation was carried out according to the 45 ° cantilever method in JIS L1906.

[Air permeability (cm ³ / cm ² / s)]
The air permeability (cm ³ / cm ² / s) was measured by the Frazier-type method according to JIS L 1096 “Test method for woven and knitted fabrics”, 8.26.

[Crimp ratio and number of crimps]
The crimp rate (%) was measured according to JIS L 1015 (8.12.2). The number of crimps (pieces / 25 mm) was measured according to JIS L 1015 (8.12.1).

[Visible light transmittance (%)]
It was measured by a spectrophotometer by the all wavelength range averaging method. The visible light range was 400 to 800 nm. The instrument used was a V-570 spectrophotometer INS-470 integrating sphere, manufactured by JASCO Corporation.

[Thermal conductivity(%)]
According to JIS A1412-2 (Method for measuring thermal resistance and thermal conductivity of heat insulating material-Part 2: Heat flow meter method (HFM method)).

[Peel strength and shear strength (N / cm ² )]
As the evaluation method of the engaging property, the tensile shear strength (shear strength) and the peel strength (peel strength) were measured according to JIS-L3416.

[Repeatability]
After engaging the non-woven fiber structure with the male surface fastener, they are separated in the same manner as in the peel strength test, and the engaging and peeling actions are repeated two more times, according to the following criteria. The engaging property was evaluated.
Good: Between the first engagement and the third engagement, the non-woven fiber structure and the male surface fastener can be engaged with each other to the same degree, and even after the third peeling, the non-woven fiber structure No excessive fluffing or tearing of the structure could be visually confirmed.
Poor: After the first peeling, excessive fluffing or breakage was visually confirmed in the nonwoven fibrous structure.

[Example 1]
(1) Manufacture of non-woven fiber structure Wet heat adhesive fibers were used as fibers constituting the non-woven fiber structure. As the wet heat adhesive fiber, the core component is polyethylene terephthalate, and the sheath component is ethylene-vinyl alcohol copolymer (ethylene content 44 mol%, saponification degree 98.4 mol%, core-sheath ratio = 50/50). A certain core-sheath type composite staple fiber (manufactured by Kuraray Co., Ltd., "Sofista", 3.3 dtex, 51 mm long, 21 crimps / inch, crimping rate 13.5%) was prepared.
A card web having a basis weight of about 100 g / m ² was prepared by the card method using the core-sheath type composite staple fiber.

This card web was transferred to a belt conveyor equipped with a 50 mesh, 500 mm wide stainless steel endless wire mesh. The same endless wire mesh was also installed above the wire mesh of the belt conveyor, and they were rotated in the same direction at the same speed. In the belt conveyor used, the distance between these wire meshes could be adjusted arbitrarily.

Then, the card web is introduced into a steam injecting device provided on the belt conveyor, a saturated steam of 0.1 MPa is ejected perpendicularly to the card web from the device to perform steam treatment, and the nonwoven fiber structure used in the present invention. Got the body In this steam injection device, a nozzle was installed in one conveyor so as to spray saturated steam toward the web via a conveyor net, and a suction device was installed in the other conveyor. In addition, another injection device, which is a combination in which the arrangement of the nozzle and the suction device is reversed, is installed downstream of the injection device in the web traveling direction. The water vapor injection nozzle had a hole diameter of 0.3 mm, and the nozzles were arranged in a row at a 1 mm pitch along the conveyor width direction. The processing speed was 20 m / min, and the distance between the nozzle and the conveyor belt on the suction side was 7.5 mm.
Steam treatment was applied in the thickness direction (vertical direction) of the card web to melt the heat-moisture bonding fibers to form bonding points between the fibers. The obtained card web had a board-like form and had a predetermined porosity. Then, a total of three card webs having a basis weight of 100 g / m ² were produced by the same method as described above, three card webs obtained were stacked, and the processing speed was 5 m / min, and the distance between the nozzle and the conveyor belt on the suction side was adjusted. A non-woven fiber structure was obtained by performing steam treatment under the same conditions except that the length was set to 3.0 mm and the steam injection device was introduced.

(2) Manufacture of male surface fastener A polypropylene resin (product number EA-7WD, manufactured by Nippon Polypro Co., Ltd.) is extruded from a nozzle, cooled, and a plurality of sections having a substantially Y-shaped cross section are formed in a direction orthogonal to the extrusion direction (length direction). A tape-shaped material having a cross section of engaging elements in which rows are arranged at a predetermined interval is formed. The number of row strips is 13, and the width of the tape-like material is 5 mm. Then, with respect to this row, cuts were made from the tip of the row to the vicinity of the base at intervals of 0.2 mm in a direction orthogonal to the length direction of the row. Next, the tape-shaped material was stretched in the length direction to manufacture a male surface fastener. The male engaging element of the obtained male surface fastener has a substantially Y-shaped cross section shown in FIG. 5A, and an enlarged photograph thereof is shown in FIG. Further, Table 1 shows the structures of the male surface fastener and the male engaging element.

Using the obtained non-woven fiber structure and the male surface fastener, the engaging property was evaluated. The tensile shear strength (shear strength) was 6.5 N / cm ² , and the peel strength (peel strength) was 1.8 N / cm ² . Table 1 shows the shape characteristics of the non-woven fiber structure and the male surface fastener, and the evaluation of the engaging property. The obtained non-woven fiber structure had good handleability and good repetitive engagement with the male surface fastener.

[Example 2]
(1) Manufacture of non-woven fiber structure Wet heat adhesive fiber and polyethylene terephthalate staple fiber used in Example 1 (Tetron T471, manufactured by Toray Industries, Inc., fineness: 1.6 dtex, fiber length: 51 mm, crimp number: 12 0.5 pieces / 25 mm, crimping ratio: 14.0%) were prepared. Wet-heat adhesive fibers / polyethylene terephthalate staple fibers = 55/45 (mass ratio) were mixed and mixed to obtain 50 card webs having a basis weight of about 100 g / m ² by the card method. First, 10 non-woven webs were laminated under the same conditions as in Example 1 except that the processing speed was 10 m / min and the distance between the nozzle and the conveyor belt on the suction side was 30.5 mm. Obtained. Next, the same conditions except that three non-woven fiber structures obtained were laminated, the processing speed was 3 m / min, the distance between the nozzle and the conveyor belt on the suction side was 30.5 mm, and the saturated vapor pressure was 0.3 MPa. A dense non-woven fiber structure was obtained. Further, the dense fibrous non-woven fiber structure was laminated so as to be sandwiched so as to be arranged, the processing speed was 2 m / min, the distance between the nozzle and the conveyor on the suction side was 90.5 mm, and the saturated vapor pressure was 0. A non-woven fiber structure was obtained under the same conditions as in Example 1 except that the pressure was 3 MPa. The obtained non-woven fibrous structure had a high density layer in the central portion.

(2) Manufacture of male surface fastener Polyamide resin (Toray Industries, Ltd. product number U141) is extruded from a nozzle, cooled, and a plurality of row strips having a substantially Y-shaped cross section are formed in a direction orthogonal to the extrusion direction (length direction). A tape-like material having a cross section of engaging elements arranged at predetermined intervals was molded. The number of row strips is 13, and the width of the tape-like material is 5 mm. Then, with respect to this row, cuts were made from the tip of the row to the vicinity of the base at intervals of 0.2 mm in a direction orthogonal to the length direction of the row. Next, the tape-shaped material was stretched in the length direction to manufacture a male surface fastener. The male engaging element of the obtained male surface fastener had a substantially Y-shaped cross section shown in FIG. 5A. Further, Table 1 shows the structures of the male surface fastener and the male engaging element.

Using the obtained non-woven fiber structure and the male surface fastener, the engaging property was evaluated. The tensile shear strength (shear strength) of both was 6.5 N / cm ² , and the peel strength (peel strength) was 1.8 N / cm ² . Table 1 shows the shape characteristics of the non-woven fiber structure and the male surface fastener, and the evaluation of the engaging property. The obtained non-woven fiber structure had good handleability and good repetitive engagement with the male surface fastener.

[Example 3]
(1) Manufacture of Nonwoven Fiber Structure Polyethylene terephthalate staple fiber (Tetron T471, manufactured by Toray Industries, Inc.) used in Example 2, fineness: 1.6 dtex, fiber length: 51 mm, crimp number: 12.5 / 25 mm, crimp ratio: 14.0%) was prepared and a card web having a basis weight of about 100 g / m ² was prepared by the card method. This card web was cross-laid with 6 layers and laminated, and the fibers were entangled by a needle punching method to obtain a non-woven fiber structure. The processing speed was 2.5 m / min, and the needle density (number of punches) was 1000 times / cm ^{2 in} total from both sides.

(2) Manufacture of male type surface fastener Polyamide resin (Toray Industries, Ltd. product number U141) is extruded from a nozzle, cooled, and in a direction orthogonal to the extruding direction (length direction), a plurality of row strips having a double-barbed cross section. Was molded into a tape-like material having engaging element cross sections arranged at a predetermined interval. The number of row strips is 13, and the width of the tape-like material is 5 mm. Then, with respect to this row, cuts were made from the tip of the row to the vicinity of the base at intervals of 0.2 mm in a direction orthogonal to the length direction of the row. Next, the tape-shaped material was stretched in the length direction to manufacture a male surface fastener. The male engaging element of the obtained male surface fastener had a two-stage barbed section shown in FIG. 5 (f). Further, Table 1 shows the structures of the male surface fastener and the male engaging element.

Using the obtained non-woven fiber structure and the male surface fastener, the engaging property was evaluated. Both tensile shear strength (shear strength) of 9.8 N / cm ^2, the peel strength (peel strength) was 2.7 N / cm ^2. Table 1 shows the shape characteristics of the non-woven fiber structure and the male surface fastener, and the evaluation of the engaging property. The obtained non-woven fiber structure had good handleability and good repetitive engagement with the male surface fastener.

[Example 4]
The same method as in Example 1 except that the engaging element density (M: pieces / cm ² ) and the engaging element volume density (mm ³ / cm ² ) of the male surface fastener were set as shown in Table 1. Using the obtained non-woven fiber structure and the male surface fastener, the engaging property was evaluated. The tensile shear strength (shear strength) was 5.1 N / cm ² , and the peel strength (peel strength) was 1.4 N / cm ² . Table 1 shows the shape characteristics of the non-woven fiber structure and the male surface fastener, and the evaluation of the engaging property. The obtained non-woven fiber structure had good handleability and good repetitive engagement with the male surface fastener.

[Comparative Example 1]
(1) Manufacture of non-woven fiber structure Using the same moist heat-bonding fibers as in Example 1, the same procedure as in Example 1 was used to obtain a card web having a basis weight of about 100 g / m ² . A nonwoven fibrous structure was obtained under the same conditions as in Example 1 except that 10 of the obtained card webs were stacked and introduced into a steam injection device at a processing speed of 3 m / min.

(2) Manufacture of male surface fastener Polyamide resin (Toray Industries, Ltd. product number U141) is extruded from a nozzle, cooled, and a plurality of rows having a substantially Y-shaped cross section are formed in a direction orthogonal to the extrusion direction (length direction). A tape-like material having a cross section of engaging elements arranged at predetermined intervals was molded. The number of row strips is 13, and the width of the tape-like material is 5 mm. Then, with respect to this row, cuts were made from the tip of the row to the vicinity of the base at intervals of 0.2 mm in a direction orthogonal to the length direction of the row. Next, the tape-shaped material was stretched in the length direction to manufacture a male surface fastener. The male engaging element of the obtained male surface fastener had a substantially Y-shaped cross section shown in FIG. 5A. Further, Table 1 shows the structures of the male surface fastener and the male engaging element.

Using the obtained non-woven fiber structure and male surface fastener, an attempt was made to evaluate the engaging properties, but they did not engage.

[Comparative Example 2]
(1) Manufacture of Nonwoven Fiber Structure Using the same method as in Comparative Example 1, a web having a basis weight of about 50 g / m ² was obtained. The resulting web was hydroentangled. In the hydroentangling treatment, a 76-mesh plain woven polyester net was used as a support by using nozzles provided with orifices having a hole diameter of 0.10 mm at intervals of 0.6 mm, and two nozzles were used for the first row. The water pressure of the water stream injected from the nozzle was 1.0 MPa, and the water pressure of the water stream injected from the nozzle in the second row was 1.0 MPa at a speed of 10 m / min.
The web (nonwoven fabric) in which the fibers were entangled by the hydroentangling treatment was dried at 140 ° C. using a cylinder type dryer heated with steam. Table 1 shows various properties of the obtained nonwoven fabric.

(2) Manufacture of male surface fastener The polypropylene resin used in Example 1 (Japan Polypro Co., Ltd., product number EA-7WD) was extruded from a nozzle, cooled, and then approximately Y in a direction orthogonal to the extrusion direction (length direction). A tape-shaped article having a cross section of engaging elements in which a plurality of rows having a character cross section are arranged at a predetermined interval is formed. The number of row strips is 13, and the width of the tape-like material is 5 mm. Then, with respect to this row, cuts were made from the tip of the row to the vicinity of the base at intervals of 0.2 mm in a direction orthogonal to the length direction of the row. Next, the tape-shaped material was stretched in the length direction to manufacture a male surface fastener. The male engaging element of the obtained male surface fastener had a substantially Y-shaped cross section shown in FIG. 5A. Further, Table 1 shows the structures of the male surface fastener and the male engaging element.

Using the obtained non-woven fiber structure and the male surface fastener, the engaging property was evaluated. As an evaluation method, tensile shear strength (shear strength) and peel strength (peel strength) were measured according to JIS-L3416. Tensile shear strength 6.3N / cm ^2, was peel strength 1.2 N / cm ^2. Table 1 shows the shape characteristics of the non-woven fiber structure and the male surface fastener, and the evaluation of the engaging property. The resulting nonwoven fibrous structure engaged but broke when disengaged. In addition, there was no independence, resulting in poor handling.

[Comparative Example 3]
(1) Manufacture of Nonwoven Fiber Structure Polyethylene terephthalate staple fiber (Tetron T471, manufactured by Toray Industries, Inc.) used in Example 2, fineness: 1.6 dtex, fiber length: 51 mm, crimp number: 12.5 / 25 mm, crimp ratio: 14.0%) was prepared and a card web having a basis weight of about 100 g / m ² was prepared by the card method. Three of the obtained card webs were laminated and subjected to hydroentangling treatment. In the hydroentangling treatment, a 76-mesh plain woven polyester net was used as a support by using nozzles provided with orifices having a hole diameter of 0.10 mm at intervals of 0.6 mm, and two nozzles were used for the first row. The water pressure of the water stream injected from the nozzle was 1.0 MPa, and the water pressure of the water stream injected from the nozzle in the second row was 1.0 MPa at a speed of 10 m / min.
The web (nonwoven fabric) in which the fibers were entangled by the hydroentangling treatment was dried at 140 ° C. using a cylinder type dryer heated with steam. Table 1 shows various properties of the obtained nonwoven fabric.

Using the obtained non-woven fiber structure and the male surface fastener, the engaging property was evaluated. Both tensile shear strength (shear strength) of 6.3N / cm ^2, the peel strength (peel strength) was 1.2 N / cm ^2. Table 1 shows the shape characteristics of the non-woven fiber structure and the male surface fastener, and the evaluation of the engaging property. The resulting non-woven fibrous structure was engaged but had no self-supporting property, resulting in poor handleability.

As shown in Table 1, comparing Example 1 with Comparative Examples 1 and 2, although they use the same male surface fastener, the engaging properties with the non-woven fibrous structure are significantly different. In Comparative Example 1, since the non-woven fiber structure does not have sufficient voids, the male engaging element should be engaged with the non-woven fiber structure in Comparative Example 1. I couldn't. Further, in Comparative Example 2, since the non-woven fiber structure had poor self-supporting property, the nonwoven fabric structure was torn when detached after being engaged, and thus it was not possible to repeatedly engage. Further, even when engaged, the peel strength was inferior to that of Example 1.
On the other hand, in Example 1, the engaging force was superior to Comparative Examples 1 and 2. Further, even when they were repeatedly engaged, they could be used without causing excessive fluffing or tearing in the non-woven fiber structure.

For example, a value obtained by dividing the product of the engaging element height (A), the number of umbrellas (N) and the engaging element density (M of the male surface fastener by the engaging portion density (Dc) of the non-woven fiber structure (Dc) ( Regarding A × N × M) / Dc, it was 1.323 in Example 1 and 0.397 in Comparative Example 1, showing a large difference.
Further, the product of the engaging portion density (Dc) of the non-woven fiber structure and the trunk width (E) of the male surface fastener was 24 in Example 1, but in Comparative Example 1, the relationship of the non-woven fabric structure was determined. It was 80 because the joint density was too high.
Furthermore, in Comparative Example 1, the ratio of the basis weight to the volume density of the engaging element was high, which was 87 in Example 1, but 289 in Comparative Example 1.

In Example 2, the non-woven fiber structure has a larger basis weight and a larger thickness than Example 1, but even in such a case, the structure of the male surface fastener and / or the non-woven fiber By adjusting the structure of the structure, it was possible to achieve good engagement as in Example 1. In particular, in Example 2, as compared with Comparative Example 1, it was possible to achieve good engaging properties, even though the basis weight of the non-woven fiber structure was five times as large.

Further, in Example 3, although the non-woven fiber structure does not use the wet heat bonding fiber, by controlling the structure of the male surface fastener, a better engaging property than in Examples 1 and 2 is obtained. I was able to achieve it.

On the other hand, in Comparative Example 3, although the male surface fastener having the same shape as that of Example 1 was used, the non-woven fiber structure was not self-supporting and was defective. Further, even when engaged, the peel strength was inferior to that of Example 1. Further, when repeatedly engaged, the non-woven fiber structure was excessively fluffed and the repetitive engagement property was poor.

Further, in Example 4, although the engaging element density and the engaging element volume density of the male surface fastener were lower than those of the male surface fastener used in Comparative Example 2, the peel strength was high and the non-woven fiber was used. Since the structure is highly self-supporting, the repetitive engaging property is good.

Since the engaging assembly kit of the present invention can satisfactorily engage even when a non-woven textile structure having self-supporting property is used, it is a building material, a heat insulating material, a decorative material, a cover material, and a humidity control. Materials, sound-absorbing materials (sound-insulating wall materials, sound-insulating materials for vehicles, etc.), cushioning materials, partition materials, and other engaging assemblies, as well as Japanese sliding doors using a frame, doors, sliding doors, movable or fixed partitions, indoor openings, It can be usefully used as a combination material (manufacturing kit) for forming an engaging assembly such as a folding screen, a sound absorbing panel, a ceiling, a wall, a floor, and a lighting fixture.

Although the preferred embodiments of the present invention have been described above, various additions, changes or deletions are possible without departing from the spirit of the present invention, and such things are also included in the scope of the present invention. Be done.

DESCRIPTION OF SYMBOLS 10 Male surface fastener 11 Male engaging element 12 Base material 13 Stem portion 14 Gripping portion 15 Boss portion 20 Nonwoven fiber structure 21 Engaging portion 22 Fiber A Height of male engaging element B Male engaging element Depth C Pocket depth D Width of grip E Width of trunk

Claims

A male surface fastener in which a plurality of male engaging elements stand on the base material, and an engaging assembly kit composed of a self-supporting non-woven fiber structure,
The non-woven fibrous structure includes at least an engaging portion having a thickness equal to or greater than the height of the male engaging element,
The male engaging element is composed of a trunk portion and at least one grip portion extending from the trunk portion,
The engaging portion is composed of fibers having an average fiber diameter of 1 to 50 μm and has a porosity of 80 to 98.5%.
An engagement assembly kit in which the pocket depth (C: mm) of the grip portion is twice or more as a ratio (C / F × 1000) of the average fiber diameter (F: μm).
The engagement assembly kit according to claim 1, wherein the non-woven fiber structure has a bending resistance of 10 cm or more by a 45 ° cantilever method according to JIS L-1906 in at least one direction.
The engagement assembly kit according to claim 1 or 2, wherein the male surface fastener is composed of at least one selected from the group consisting of a polyolefin resin, a polyamide resin, a polyester resin, and a thermoplastic elastomer. Combined assembly kit.
The engagement assembly kit according to any one of claims 1 to 3, wherein the male engagement element has a height of 0.2 to 5.0 mm.
The engagement assembly kit according to any one of claims 1 to 4, wherein the apparent density of the engagement portion of the non-woven fibrous structure is 30 to 300 kg / m 3 .
The engaging assembly kit according to any one of claims 1 to 5, wherein the ratio of the depth (C: mm) of the grip portion to the average fiber diameter (F: μm) of the non-woven fibrous structure is male-type engaged. C / F × 1000 × N × (1 / Dc), which is a value weighted by the number of umbrellas of the element (N: number) and the density of the engaging portion of the non-woven fiber structure (Dc: kg / m 3 ), , 0.10 or more, an engagement assembly kit.
The engagement assembly kit according to any one of claims 1 to 6, wherein the height (A: mm) of the male engagement elements, the number of umbrellas (N: pieces), and the element density (M: pieces / cm 3 ). (A × N × M) / Dc, which is a value obtained by dividing the product of the above by the density (Dc: kg / m 3 ) of the engaging portion of the non-woven fiber structure, is 1.200 or more. ..
The engagement assembly kit according to any one of claims 1 to 7, wherein the apparent density D T of the entire nonwoven fibrous structure and the apparent density Dc of the engagement portion are Dc ≤ D T. kit.
The engagement assembly kit according to any one of claims 1 to 8, wherein some of the fibers constituting the non-woven fiber structure are combined.
An engagement assembly kit according to any one of claims 1 to 9, wherein a part of fibers constituting the non-woven fiber structure is composed of a heat-adhesive fiber.
The engagement assembly kit according to any one of claims 1 to 10, wherein the ratio (mass ratio) of the heat-bonding fibers and the non-heat-bonding fibers in the fibers forming the non-woven fiber structure is the heat-bonding fibers. / Non-heat adhesive fiber = 100/0 to 20/80, engagement assembly kit.
The engagement assembly kit according to any one of claims 1 to 11, wherein a part of fibers constituting the non-woven fiber structure is composed of a wet heat heat adhesive fiber.
The engagement assembly kit according to any one of claims 1 to 11, further comprising a frame.
An engagement assembly constituted by the engagement assembly kit according to any one of claims 1 to 13 and assembled by engaging a non-woven fiber structure with a male surface fastener.
A non-woven fibrous structure used in the engagement assembly according to claim 14.
A male surface fastener used for the engagement assembly according to claim 14.