JP2867113B2 - Hook fastener female material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female fastener material, particularly to a female fastener material suitable for disposable products such as disposable diapers.

[0002]

2. Description of the Related Art Normally, a hook-and-loop fastener is composed of a female member having a loop shape and a male member having a hook portion such as a hook type or a mushroom type engaged with the female member. Since the hook-and-loop fastener can be used easily, the opening / closing part of clothes, bags, shoes, daily necessities, etc.
It is used by being provided in a mounting portion of a vehicle seat cover. Recently, in order to fix and fix a disposable diaper, a fastener having a hook-and-loop fastener attached to a waist portion of a diaper has been proposed and put to practical use. In general, as a female material of a surface fastener, a sheet in which a loop formed of a monofilament or a multifilament of synthetic fibers protrudes from one side of a woven or knitted fabric is generally used. Such a female material is very useful because the engaging force with the male material is very strong, and the engaging force does not deteriorate even after repeated use.

[0003] However, such a female material is not suitable for use in a disposable diaper or the like. This is because a female material having a structure in which a loop protrudes from a woven or knitted fabric is generally bulky and lacks flexibility, and thus gives a discomfort to a diaper wearer. Also, the production costs of such female materials are generally high, so the use of such female materials in price-competitive disposable goods is almost unrealistic. In other words, the performance of the hook-and-loop fastener used for a disposable diaper or the like has an engagement force enough to withstand human movement, and a durability and an engagement performance enough to endure about 4 to 5 repeated attachments and detachments during use. Since it is sufficient, the manufacturing cost is more important than the engaging force.

[0004] Therefore, various surface fasteners have been conventionally proposed in which the manufacturing cost is emphasized. For example, JP
In Japanese Patent No. 38105, a hook-and-loop fastener member is proposed in which a non-woven sheet is stitched to project a loop on the surface of a non-woven fabric. In addition, Japanese Patent Application Laid-Open No.
According to No. 2, a multi-filament yarn having a large number of loops, coils, and the like on a surface thereof is inserted into a fabric by a fluid disturbance treatment to obtain a non-bulky surface fastener female material having a sufficient engaging force. Are listed. Japanese Unexamined Patent Publication No. Hei 6-33359 discloses a female surface fastener made of a long-fiber nonwoven fabric having a large number of wrinkles on the surface.

[0005]

However, these female fasteners have the following disadvantages.
That is, the fastener member disclosed in Japanese Patent Application Laid-Open No. 62-38105 has no problem in terms of engaging force, but the stitching of the nonwoven fabric inevitably leads to an increase in manufacturing cost, resulting in intense price competition for disposable products. Is still unsuitable for Similarly, the female material described in Japanese Patent Application Laid-Open No. 4-105602 has no problem with respect to peel strength and tensile strength, but the production cost increases because it is necessary to weave using at least one specific multifilament. On the other hand, the long-fiber nonwoven fabric disclosed in JP-A-6-33359 can be manufactured at a low cost and is suitable for so-called disposable products, but has a weak engaging force with a male material. There is a problem that it is easy to separate due to the movement of. In other words, a female material having a hook-and-loop fastener that shows an engaging force that can be used for a diaper or the like without a strong engaging force like a general-purpose female material and that is economically advantageous has not yet been obtained. .

Accordingly, the present inventors have conducted intensive studies so as to eliminate the inconvenience seen in the conventional female fastener of hook-and-loop fastener and to provide an inexpensive female member having an engaging force suitable for disposable diapers and the like. After laminating a fibrous web comprising at least 50% by weight of heat-shrinkable fibers having a maximum heat shrinkage of at least 50% on a relatively coarse knitted fabric, and intermingling the fibers to integrate them, By applying heat treatment, heat shrinking the fibrous web and gathering the knitted fabric,
When a composite sheet was formed on the surface of which a loop portion made of a yarn constituting a knit was formed, the composite sheet was found to be suitable for a hook-and-loop fastener female material, and the present invention was reached.

[0007]

According to the present invention, a fibrous web containing at least 50% by weight of a heat-shrinkable fiber having a maximum heat shrinkage of at least 50% is laminated with a coarse knitted fabric. The coarse knitted fabric is gathered to form a large number of loops formed of yarns constituting the knitted fabric on the surface, and the fiber web and the coarse knitted fabric are integrated by the inter-fiber entanglement in the portion where the loop is not formed. It is a hook-and-loop fastener female material characterized in that it is formed.

According to the present invention, a heat-shrinkable fibrous web is laminated with a coarse knitted fabric (hereinafter simply referred to as a knitted fabric) which does not substantially shrink at a temperature at which the heat-shrinkable fibrous web shrinks. The knitted fabric is gathered by utilizing the difference, so that a large number of loop portions suitable for engaging with the hook portions of the male material are formed on the surface thereof. Therefore,
The fibrous web must contain heat shrinkable fibers. The maximum heat shrinkage of the heat-shrinkable fibers is desirably at least 50%, and the fibrous web preferably contains such heat-shrinkable fibers in an amount of 50% by weight or more. Here, the maximum thermal shrinkage refers to the maximum thermal shrinkage of the heated fiber while maintaining the fiber shape. When a heat-shrinkable fiber having a maximum heat shrinkage of less than 50% is used, the heat shrinkage of the entire fibrous web is insufficient, so that the knitted fabric cannot be gathered well, and a loop portion suitable for engagement with a male material is formed on the surface. Cannot be formed. Similarly, when the proportion of fibers contained in the fibrous web is less than 50% by weight, the fibrous web does not shrink sufficiently, and no loops are formed on the surface of the knitted fabric.

If the heat shrinkable fiber is contained in an amount of 50% by weight or more, other fibers can be mixed with the fibrous web. The fibers to be mixed are not particularly limited, and recycled fibers such as rayon, semi-synthetic fibers such as acetate, polyamide fibers such as nylon 6, nylon 66, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, polyethylene, polypropylene and the like. One or more selected from polyolefin fibers can be used.

In the present invention, as a heat-shrinkable fiber having a maximum heat shrinkage of at least 50%, an ethylene-propylene random copolymer having a melting peak temperature (Tm ° C.) in the range of 130 <Tm <145 ° C. Of a polymer containing 70% by weight or more of the polymer. Here, the melting peak temperature means a differential scanning calorimeter (D
SC) when the heat of fusion of the polymer was measured by SC)
The temperature when the C curve shows the highest value. Here, when the melting peak temperature is lower than 130 ° C., the polymer exhibits rubber-like elasticity, and there is an inconvenience that the card passing property of the fiber is deteriorated. On the other hand, if the temperature exceeds 145 ° C., the dry heat shrinkage of the fiber becomes about the same as ordinary polypropylene, which is not preferable.

[0011] The ethylene-propylene random copolymer is a polymer exhibiting excellent shrinkage within the above-mentioned temperature range, and a three-fold stretched fiber consisting of the ethylene-propylene random copolymer can be obtained at 130 ° C just below the melting point within one minute. Shows a heat shrinkage of 93%. Therefore, it is advisable to mix and use other polymers in order to control the heat shrinkability. At this time, the proportion of the ethylene-propylene random copolymer is desirably 70% by weight or more. If the content is less than 70% by weight, the maximum heat shrinkage of the obtained fiber is less than 50%. As the other polymer to be mixed, a terpolymer of ethylene-butene-1-polypropylene or an olefin-based polymer such as polypropylene can be preferably used.

The form of the fibrous web may be any of a parallel web made of staple fibers, a cross web, a semi-random web, a random web, and a spunbond web in which continuous fibers are accumulated. However, if the direction of the thermal shrinkage of the fibrous web is concentrated in one direction, the gathering of the knitted fabric can be easily uniformly generated, and a female material having an orderly appearance can be obtained. Therefore, in the present invention, a parallel web composed of staple fibers having a fiber length of 25 to 151 mm, more preferably 38 to 76 mm can be preferably used. Also,
The basis weight of the fibrous web can be appropriately selected according to the thickness of the female material to be finally obtained, and in the present invention, the basis weight is particularly preferably 10 to 30 g / m ² . If it is less than 10 g / m ² , the inter-fiber entanglement with the knitted fabric tends to be insufficient.
If it exceeds 0 g / m ² , the thickness of the fibrous web after heat shrinkage becomes large, the whole fastener becomes bulky, and the flexibility becomes poor.

In the present invention, the knitted fabric is integrated with the fibrous web so that a large number of loop portions are developed by heat shrinkage of the fibrous web. Therefore, the knitted fabric used here may be made of a material that does not essentially shrink at the temperature at which the heat-shrinkable fibers contained in the fiber web shrink,
Rayon, cotton, acetate, nylon, polyester,
A yarn knitted with a spun yarn made of polyethylene, polypropylene, or the like, a monofilament, a multifilament, a split yarn, or the like can be used arbitrarily. Above all, a knitted fabric composed of a monofilament or a multifilament obtained by melt-spinning nylon or polyester can be obtained at a low cost, and is suitable for a female surface fastener used in disposable products such as diapers.

[0014] After the heat-shrinkable fiber layer and the non-heat-shrinkable fiber layer are integrated, a sheet-like material having irregularities formed on the non-heat-shrinkable fiber layer by heat shrinkage of the heat-shrinkable fiber layer is better known than before. However, the present invention is characterized in that a knitted fabric is used as the non-heat-shrinkable fiber layer. In the present invention, the knitted fabric is most preferably used because the structure has a structure having relatively voids between constituent yarns. That is, when a heat treatment is applied to a material obtained by integrating a knitted material and a fibrous web containing heat-shrinkable fibers, and the knitted material is gathered by using the heat shrinkage force of the fibrous web, the convex portions formed on the surface thereof are formed of yarn. Thus, a kind of loop having an opening between the thread and the thread is obtained, and a loop very suitable for engagement with the hook portion of the male material can be obtained. Therefore, in order to obtain a convex portion or a loop portion suitable for engaging with the hook portion of the male material, it is desirable to use a relatively open knitted fabric having a small knitting density. If the density of the knitted fabric is large, the gap between the yarns in the loop formed by gathering becomes too dense, and the number of open portions decreases,
This is because it becomes impossible to smoothly engage the hook portion of the male member.

Another reason for using the knitted fabric in the present invention is that the yarns constituting the knitted fabric are continuous. That is, when the knitted fabric is gathered to form a loop portion, the base of the loop, that is, the portion where the loop is not formed is held by the fibrous web, and the thread of the loop portion does not easily come off. Loop detachment is less likely to occur when peeling. Therefore, the female material of the present invention has an advantage that a change in the surface state is small even when it is repeatedly used, and a decrease in the engaging force can be suppressed.

In the present invention, the softer and thinner the knitted fabric is, the easier it is to gather, and a fine loop portion can be formed. Furthermore, if the yarn constituting the knitted fabric is composed of a plurality of yarns such as a multifilament, one loop portion is composed of a large number of fibers. Is advantageous.

More specifically, the number of wales is 20 to 60 knitted with a monofilament having a fineness of 10 to 60 denier or a multifilament having a total fineness of 10 to 60 denier.
A warp knitted fabric such as a tricot having a number of pieces / inch and a course number of 15 to 50 pieces / inch, or a flat knitted fabric is preferably used. Further, those obtained by subjecting these knits to resin processing can also be preferably used. In this case, since the elongation of the knitted fabric is suppressed, the handleability in the manufacturing process is improved, and a female fastener material having excellent dimensional stability can be obtained.

After laminating the fibrous web and the knitted fabric having the above-described structure, intermingling the fibers to integrate the two, heat treatment is performed, and the fibrous web is shrunk to gather the knitted fabric. In the portion where the loop portion is formed and where the loop portion is not formed, the female member of the hook-and-loop fastener of the present invention in which the knitted fabric and the fiber web are integrated by inter-fiber entanglement can be obtained. Hereinafter, a specific manufacturing method will be described.

The integration of the fibrous web and the knitted fabric is achieved by entanglement between the fibers constituting both. Examples of the method for causing entanglement between fibers include high-pressure water flow treatment and needle punching. Among them, the high-pressure water-flow treatment is the most preferable entanglement means because a sheet-like material having less fuzz and having a good surface condition can be obtained. The high-pressure water flow treatment can be performed according to a usual method. Specifically, a laminate of a fibrous web and a knitted fabric is placed on a wire mesh of 90 to 120 mesh (mesh: the number of openings per inch), and the lamination is performed according to the basis weight of the fibrous web and the density of the knitted fabric.
Water may be ejected from a nozzle having a hole diameter of 0.1 mm to 0.2 mm at a pressure of 0 to 150 kg / cm ² to act on the laminate.
For example, the number of wales is 20 to 60 pieces / inch and the number of courses is 15 to 5 knitted with a fiber web having a basis weight of 10 to 30 g / m ² and a monofilament having a fineness of 10 to 60 denier or a multifilament having a total fineness of 10 to 60 denier.
In the case where a warp knitted fabric or a flat knitted fabric of 0 pieces / inch is integrated, the pressure of the jetted water is preferably 30 to 70 kg / cm ² . In addition, when the water stream is applied from the fiber web side, the entanglement of both can be performed more effectively.

Next, a heat treatment is applied to the integrated laminate. The heat treatment is performed to gather the knitted fabric by heat shrinking only the fibrous web and to form a large number of loops on the surface of the knitted fabric. The heat treatment is performed under the condition that the heat-shrinkable fibers contained in the fibrous web are heat-shrinked and the area of the entire web is heat-shrinked by 30 to 85%, that is, the area after heating becomes 70 to 15% before heating. It is good to perform under such conditions. At this time, if the shrinkage is less than 30%, the shrinkage is insufficient and a loop portion cannot be sufficiently formed on the surface of the knitted fabric, which is not preferable. Also, as the shrinkage ratio increases, the number of loop portions formed per unit area increases, which is suitable for engagement with a male material. However, the number of loop portions is reduced by 85% or more to form a large number of loop portions. However, the engagement force does not change, but rather the thickness increases and the flexibility is lost, which is not preferable.

The heat treatment can be performed, for example, by a hot air penetration type dryer. In this case, the heat shrinkage is determined by the temperature and the residence time. For example, when a fiber made of the above-mentioned ethylene-propylene random copolymer is used as the heat-shrinkable fiber, the heating temperature (T ° C.)
Heat treatment may be performed at this temperature within a range of 0 <T <Tm + 130 for 30 seconds to 1 minute. If the heating temperature is less than 100 ° C., the heat shrinkage is insufficient, and if it exceeds Tm + 130 ° C., the fibers are completely melted and the shrinkage stress is remarkably reduced, which is not preferable.

Due to the thermal shrinkage of the fibrous web, a large number of loops made of yarn constituting the knit are formed on the surface of the knit. As shown in FIG. 2, a part of the knitted fabric (2) is separated from the fibrous web (3) in the loop portion (4), and the fibrous web (3) is formed.
Is formed as a result of the exfoliated portion becoming an excessive portion and floating in an arch shape due to the surface shrinkage. Therefore, the knitted fabric (2) and the fibrous web (3) are still entangled between the fibers in the portion where the loop portion (4) is not formed,
The presence of the confounding portion ensures the integrity of the two.

As described above, the area of the fibrous web is 30 to
When it is contracted by 85%, a number of loop portions having a height of 1 to 3.5 mm suitable for engaging with the hook portion of the male material are formed. The number, shape, size, etc. of these loops vary depending on the basis weight of the fibrous web, the type of constituent fibers, the density and thickness of the knitted fabric, etc. Then, a fiber web or a knitted fabric may be selected so as to form a desired loop portion. For example, fiber web (3)
Using a parallel web made of the above-mentioned staple fiber, using a tricot knitted fabric as the knitted fabric (2),
The two layers are laminated such that the fiber direction (longitudinal direction) in the fiber web and the wale direction of the tricot knitted fabric are parallel to each other, and when this is subjected to heat treatment, the tricot knitted fabric is contracted exclusively in the longitudinal direction. As a result, as shown in FIG. 1, the ridge portion (5) having a length of about 0.5 to 5 cm formed by connecting a plurality of loop portions (4) forms an angle of 90 ° with the fiber direction in the fiber web. Since a large number of them are formed in the direction (lateral direction) to be formed and they are arranged in parallel, a beautiful surface fastener female material (1) exhibiting a neat appearance can be obtained.

[0024]

In the present invention, the fibrous web containing the heat-shrinkable fibers is heat-shrinked by the heat treatment, and the knitted fabric is gathered by the heat-shrinking force generated at that time. Further, since the basis weight of the web is increased by the heat shrinkage, the dimensional stability of the entire surface fastener is also improved. Many loops are formed on the surface of the knitted fabric due to the gathering of the knitted fabric. Here, when a coarse knitted fabric is used, the formed loop portion is open because the gap between the constituent yarns is large, so that the loop portion is very suitable for engagement with a male material. Therefore, in the present invention, the knitted fabric easily and firmly engages with the hook portion of the male material, and directly contributes to the improvement of the engagement force of the entire fastener.

[0025]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples. In addition, the engaging force of the obtained surface fastener female material was evaluated as tensile strength and peel strength, and each was measured by the following method.

[Tensile Strength] Male material (hook: hook type, width 25 mm) of a commercially available hook-and-loop fastener (manufactured by Kuraray Co., Ltd .: trade name: Velcro) and female hook-and-loop fastener material (width 25 mm) prepared in the examples With a length of 8 cm
Weighted engagement with a roller of kg. Then, using Tensilon manufactured by Orientec Co., Ltd., the upper and lower sides of the unengaged portion of the male and female members were gripped at an interval of 10 cm, a tensile strength test was performed at a speed of 10 cm / min, and the maximum strength was read. This was defined as tensile strength. In addition, the strength was measured for the first time and for the case where attachment / detachment was repeated five times.

[Peeling Strength] A female material and a female material are engaged in the same manner as the tensile strength described above, and then one end of the engaged one (4 cm in total (8 cm in total of the male material and the female material)) is peeled off to obtain an angle of 180 °. Divided into upper and lower parts in the direction of degree, and using Orientec Co., Ltd. Tensilon, the speed was 10 cm /
Peeling was performed about 3 cm at a chart speed of 10 cm / min. Then, six maximum points and six minimum points were read from the graph, and the average value was taken as the peel strength. In addition, the strength was measured for the first time and for the case where attachment / detachment was repeated five times.

Example 1 As a heat-shrinkable fiber, a fiber obtained by melt-spinning an ethylene-propylene random copolymer having a melting peak temperature of 136 ° C. at 260 ° C. and drawing 3.5 times was used (in the table). , PN
E). This fiber exhibited a dry heat shrinkage of 92% when placed in an atmosphere at 150 ° C. for 1 minute. This is fineness 2
Denier, staple fiber with a fiber length of 51 mm,
A parallel web having a basis weight of 10 g / m ² was prepared using a parallel card. This parallel web (3) has a wale number of 24 knitted with a 15 denier nylon monofilament.
The tricot knitted fabric (2) having 20 pieces / inch and the number of courses 20 / inch is laminated so that the fiber direction (longitudinal direction) in the web and the wale direction of the tricot knitted fabric are parallel to each other, and 100
The fibers were entangled by high-pressure water flow treatment at a water pressure of 40 kg / cm ² from the web side on the mesh wire mesh, and the two were integrated. Subsequently, using a hot air penetration type dryer, 12
A heat treatment was performed at 0 ° C. for 30 seconds to thermally shrink the web to gather the tricot knitted fabric, thereby forming a loop portion (4) on the surface to obtain a female hook-and-loop fastener material (1).
On the surface of the tricot knitted fabric (2), a loop portion (4) having a length of 0.5
A large number of ridges (5) of about 5 cm were formed in a direction (lateral direction) at an angle of 90 degrees with the fiber direction in the fiber web (3), and they were arranged in parallel. And about 3 to 4 such ridges (5) were formed per 1 cm in the vertical direction. By engaging this female material with the male material, tensile strength,
Table 1 shows the results of measuring the peel strength. In the table, the tensile strength and peel strength in the vertical direction refer to the strength when the fiber direction in the fiber web is engaged with the male material as the length direction of the female material, and the strength in the horizontal direction is the strength in the fiber web. The direction at an angle of 90 degrees with the fiber direction is defined as the longitudinal direction of the female material and refers to the strength when engaged with the male material. In the table, the number of loops is the number of loops formed per 1 cm in the vertical direction.

[Examples 2 to 9] Using the heat-shrinkable fibers (PNE) and the tricot knitted fabric used in Example 1 and changing the basis weight and heating temperature of the web, the same method as in Example 1 was used. A hook-and-loop fastener female material was made. As in Example 1, the surface of the obtained female material had a large number of ridges formed by connecting loops in the lateral direction, and these were arranged in parallel. Table 1 shows the performance of each of the surface fastener female members.

[0030]

[Table 1]

Example 10 Using a staple fiber (PNE) having a denier of 2 denier and a fiber length of 51 mm made of the ethylene-propylene random copolymer used in Example 1, a parallel card having a basis weight of 15 g / m ² was obtained with a parallel card. Created the web. On this parallel web, a tricot knitted fabric having a wale number of 40 / inch and a course number of 20 / inch knitted with multifilaments having a total fineness of 30 denier composed of nylon filaments having a fineness of 5 denier is laminated, and is laid on a wire mesh of 100 mesh. Water pressure 4 from web side
The fibers were entangled with each other by high-pressure water flow treatment at 0 kg / cm ² , and both were integrated. Subsequently, a heat treatment was performed at 130 ° C. for 30 seconds using a hot air penetration type drier, the web was thermally shrunk and the knitted fabric was gathered, and a loop portion was formed on the surface to obtain a hook-and-loop fastener female material. Similar to Example 1, the surface of the tricot knitted fabric had a large number of ridges formed by connecting loops in the lateral direction, and these were arranged in parallel. Table 2 shows the performance of the obtained surface fastener female member.

[Examples 11 to 13] In Example 10, a female fastener material was produced in the same manner as in Example 10, except that the basis weight and the heating temperature of the web were changed. On the surface of the obtained female material, as in Examples 1 to 10, a large number of ridges formed by connecting loops were formed in the weft direction, and they were arranged in parallel. Table 2 shows the performance of each of the surface fastener female members.

[Examples 14 to 16] Fineness 2 consisting of the ethylene-propylene random copolymer used in Example 1
Denier, staple fiber with 51mm fiber length (PN
E) 70% by weight, 30% by weight each of rayon having a fineness of 2 denier and a fiber length of 51 mm, polypropylene fiber (PP) and polyester fiber (PET) were mixed, and three kinds of parallel webs having a basis weight of 15 g / m ² were obtained with a parallel card. Created. The nylon tricot knitted fabric used in Example 10 was laminated on this parallel web, and subjected to high-pressure water flow treatment at a water pressure of 40 kg / cm ² from the web side on a 100-mesh wire mesh to entangle the fibers. Integrated. Subsequently, a heat treatment was performed at 130 ° C. for 30 seconds using a hot air penetration type drier, the web was thermally shrunk and the knitted fabric was gathered, and a loop portion was formed on the surface to obtain a hook-and-loop fastener female material. The surface of each tricot knitted fabric,
Similarly to Examples 1 to 13, a large number of ridges formed by connecting loops were formed in the horizontal direction, and they were arranged in parallel. Table 2 shows the performance of the obtained surface fastener female member.

Comparative Example 1 Using a staple fiber (PNE) having a fineness of 2 denier and a fiber length of 51 mm made of the ethylene-propylene random copolymer used in Example 1, a parallel card having a basis weight of 15 g / m ² was obtained with a parallel card. Created the web. The parallel web is made of rayon having a fineness of 2 denier and a fiber length of 51 mm, and has a basis weight of 15 g / m.
^{The two} parallel webs were laminated and subjected to a high-pressure water flow treatment at a water pressure of 40 kg / cm ² from the heat-shrinkable fiber web side on a 100-mesh wire net to entangle the fibers and to integrate them. Subsequently, using a hot air penetration type dryer, 130
A heat treatment was performed at 30 ° C. for 30 seconds to thermally shrink the heat-shrinkable fibrous web to form a large number of wrinkled convex portions on the surface of the rayon web, which was used as a female surface fastener. Table 2 shows the performance of the female surface fastener material. In addition, the female material of this hook-and-loop fastener, "peel off" occurred remarkably when the male material was peeled off. Therefore, when the attachment and detachment were repeated five times, the engagement with the male material became impossible, and the tensile strength and peel strength were measured. I couldn't do that.

[0035]

[Table 2]

[Evaluation of rigidity] The female material of the hook-and-loop fastener of Examples 1, 2, 3, and 6 and the female material of a commercially available hook-and-loop fastener (manufactured by Kuraray Co., Ltd., trade name: Velcro Velcro) were respectively cantilevered. (JIS L 1018
6.22.1 Method A) to measure the bending length,
The rigidity was evaluated. Table 3 shows the obtained results. In the table,
The bending length in the vertical direction is measured with the fiber direction in the fiber web taken as the length direction, and the bending length in the horizontal direction is defined as the length direction taking the direction at an angle of 90 ° with the fiber direction in the fiber web. Measured.

[0037]

As described above, since the female fastener material of the present invention is composed of the fibrous web composed of the heat-shrinkable fibers and the coarse knitted fabric, the female fastener material is significantly more flexible than the general-purpose female fastener material. It is rich in nature.
Therefore, when this is used for disposable diapers, for example,
There is no discomfort to the wearer. Further, the loop portion formed on the surface of the knitted fabric is made of a yarn constituting the knitted fabric,
Since the base of the loop is held by the fibrous web, the thread is less likely to fall off even when the male material is peeled off, and its good surface condition can be maintained even when it is repeatedly used. Further, the female fastener material of the present invention has an advantage that it can be manufactured at low cost without going through a complicated manufacturing process. Therefore, the hook-and-loop fastener female material of the present invention can be particularly preferably used for disposable products such as diapers that require flexibility and low cost.
In addition, if a strong engagement force is not particularly required,
The present invention can also be applied to other products, for example, clothing, a mounting portion of a vehicle seat cover, and the like.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a female surface fastener material of the present invention.

FIG. 2 is a longitudinal sectional view showing an example of a female fastener material of the present invention.

[Explanation of symbols]

 Reference Signs List 1 surface fastener female material 2 knitted fabric 3 fiber web 4 loop part 5 ridge part

[Table 3]

Claims (5)

(57) [Claims] 1. A fibrous web comprising at least 50% by weight of heat-shrinkable fibers having a maximum heat shrinkage of at least 50% and a coarse knitted fabric are laminated, and the coarse knitted fabric is gathered. A large number of loops made of yarns constituting a knitted fabric are formed on the surface, and in a portion where the loops are not formed, the fibrous web and the coarse knitted fabric are integrated by inter-fiber entanglement. Hook fastener female material. 2. The heat-shrinkable fiber has a melting peak temperature (Tm).
2. The surface fastener female material according to claim 1, wherein the fiber is a fiber made of a polymer containing at least 70% by weight of an ethylene-propylene random copolymer having a temperature of 130 <Tm <145. 3. 3. The female fastener material according to claim 1, wherein the fibrous web is a fibrous web having a basis weight of 10 to 30 g / m ² in which constituent fibers are arranged in one direction. 4. A wool number of 20 in which the coarse knitted fabric is knitted with a monofilament having a fineness of 10 to 60 deniers or a multifilament having a total fineness of 10 to 60 deniers.
The warp knitted fabric or the flat knitted fabric having a size of 60 to 60 pieces / inch and the number of courses is 15 to 50 pieces / inch.
3. The hook-and-loop fastener female material according to 3. 5. A fibrous web comprising at least 50% by weight of heat-shrinkable fibers having a maximum heat shrinkage of at least 50% on a coarse knitted fabric, and subjected to a high-pressure water flow treatment from the fibrous web side. After confounding and integrating the two, a heat treatment is applied to reduce the area of the fiber web by 30 to 85.
A method for manufacturing a female fastener material, comprising forming a large number of loops formed of yarns constituting the knitted material on the surface of the knitted material by gathering the knitted material by heat shrinkage.