JPH07156321A - Netlike body laminated material and netlike body obliquely intersecting laminated material - Google Patents

Abstract

PURPOSE:To obtain a netlike body laminated material stabilized in the widthwise dimension of the netlike body having widthwise shrinkability in the direction nearly perpendicular to tensile force by laminating together the netlike body having widthwise shrinkability in the direction nearly perpendicular to tensile force and a base material which is not widthwise shrinkable. CONSTITUTION:A first widthwise spread fiber opened net 7 is laminated to the one side of a base material 13 which is not widthwise shrinkable to form a laminated material. The widthwise spread fiber opened net 7 is a widthwise shrinkable net-like body which is spread to a required width after the uniaxial stretching of a synthetic resin film and the opening of the fiber. The widthwise spread fiber opened net 7 consists of a group of big trunk fibers 9 and a group of narrow branch fibers. The laminated body can be considerably improved in longitudinal strength. A net-like body obliquely intersecting laminated body is formed by laminating a second widthwise spread fiber opened net 7' to the widthwise spread fiber opened net 7 of the laminated body in such a manner that predetermined angles are formed between the trunk fibers 9 and 9', whereby the laminated body can be increased in lateral strength as well as longitudinal strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reticulated body laminate which is provided with excellent properties by laminating a reticulated body having shrinkability in the width direction on a substrate having no shrinkage in the width direction. The present invention relates to a widened mesh fiber oblique laminated material.

[0002]

2. Description of the Related Art A conventionally known mesh body is shown in FIG.
As shown in, the yarn 1 in the longitudinal direction (MD) and the width direction (C)
It is an orthogonal mesh body 3 in which the yarn 2 of D) intersects at a right angle, and even if a tensile force in the longitudinal direction acts on the mesh body, it does not contract in the width direction. On the other hand, the mesh 6 as shown in FIG.
Is an oblique mesh body in which both the yarn 4 and the yarn 5 are not arranged in parallel or at right angles in the longitudinal direction and the width direction, and when a tensile force in the longitudinal direction acts on the oblique mesh body, a contracting stress in the width direction is generated. As a result, the mesh body contracts in the width direction.

For example, the inventor of the present invention uniaxially stretches a synthetic resin film in the longitudinal direction and uses it for splitting fibers (for example, Jitsuko Sho 5).
No. 1-38979), and then devised a cross-woven laminated fiber nonwoven fabric 8 in which widened split fiber nets 7 (FIG. 3) and 7 ′ (FIG. 4) that have been widened to a required width are overlapped (FIG. 5, Jitsuko 56-32559). When a tensile force is applied to the split fiber nonwoven fabric 8 in the longitudinal direction, a width contracting stress is generated in the width direction. Widening split fiber net 7 which is a constituent material of split fiber nonwoven fabric
The same applies to 7'and itself. Moreover, since the widened split fiber nets 7 and 7 ′ are formed by expanding the split fibers by an external force and widening them, they have a tendency to always shrink in the width direction without exerting a tensile force.

Further, as disclosed in Japanese Patent Publication No. 62-44059, a synthetic resin film is quasi-uniaxially stretched in the longitudinal direction or rolled to form a large number of parallel cuts in a zigzag pattern. Although the present inventor has proposed a non-woven fabric in which a widening split film having a required width is laminated,
Similarly, the width-split membrane also has a tendency to generate a width-shrinking stress due to a tensile force in the longitudinal direction, and an inherent tendency to always shrink in the width direction without applying a tensile force.

[0005]

For the above reasons, the use of the obliquely laminated split fiber nonwoven fabric or the widened split membrane and the secondary processing method are naturally limited. Therefore, the present invention is to provide a reticulated body laminated material in which the widthwise dimension of the reticulated body is stabilized, and to solve such a conventional problem.

[0006] That is, an object of the present invention is to provide a reticulated body laminate having a widthwise shrinkage of the reticulated body having width shrinkability in a direction substantially perpendicular to a tensile force. It is another object of the present invention to provide a widened split fiber network and a widened split fiber network laminated material in which the widthwise dimensions of the widened split membrane are stabilized. Another object of the present invention is to provide a laminated material in which a base material having no width-shrinking property is provided with a width-splitting fiber network having a width-shrinking property and a width-splitting film to enhance the strength in the longitudinal direction. Another object of the present invention is to provide a cross-hatched laminate material in which the strength of the base material in the longitudinal and width directions is increased. Still another object of the present invention is to provide a widening split fiber network, a widening split membrane and a base material, and a laminating and adhering technique that can be easily laminated and bonded by simply heating and pressing.

[0007]

In order to achieve the above-mentioned object, a reticulated laminate material of the present invention comprises a reticulated body having a width shrinkability in a direction substantially perpendicular to a tensile force, particularly a widened split fiber mesh or It is characterized in that a widening split film and a base material having no width shrinkage are laminated. Hereinafter, the widening split fiber net will be mainly described as an example, but the present invention is not limited thereto. In addition, the cross-woven slanted laminated material of the present invention uses a widening split fiber net as a net having a width shrinkage property in a direction substantially perpendicular to the tensile force, and further uses a widening split fiber as a second net. It is a cross-layered mesh material of a mesh body in which a net is laminated such that the trunk fibers of the first and second mesh bodies form a certain angle. Further, the laminated material of the present invention is obtained by laminating and adhering the widened split fiber network, which is a constituent material of the nonwoven fabric, to the base material immediately after the split fibers are expanded and widened, and then the second widened split fiber network is similarly applied. It is laminated and fixed.

The first widened split fiber net 7 shown in FIG. 3 and the second widened split fiber net 7'shown in FIG.
9'and thin branch fiber groups 10, 10 '.
Angles 11 and 1 formed by the trunk fiber groups 9 and 9 ′ with the longitudinal direction of the net
1 ′ is preferably 15 ° or more and 75 ° or less. That is, it means that the angle 12 formed by the trunk fiber groups 9 and 9'in the reticulated diagonal cross-laminated material 8 (FIG. 5) in which the widened split fiber nets are laminated is 30 ° or more and 150 ° or less. When the angles 11 and 11 ′ are 15 ° or less, the strength (MD strength) in the longitudinal direction of the laminated material composed of the widened split fiber network and the base material is high, but the strength in the width direction (CD strength) is remarkably high. On the other hand, if it is 75 ° or more, the laminated material has a high CD strength but a significantly low MD strength, and the balance between the strength in the longitudinal direction and the strength in the width direction becomes poor.

As shown in FIG. 6, the first widening split fiber net 7 and the second widening split fiber net 7'are provided on the same surface of the base material 13.
Although it is possible to laminate the above, it is not always necessary, and if the adhesiveness between the laminated materials is good, the first widening split fiber network 7 and the second widening on both sides with the base material 13 sandwiched in between are possible. You may laminate | stack each with the split fiber network 7 '. In a base material that emphasizes MD strength, it is possible to omit the second widened split fiber net 7 ′ and form a laminated material with only the first widened split fiber net 7 and the base material 13. In that case, the angle 11
May be less than 15 °. It is also possible to use a widening split membrane instead of the above widening split fiber network. When increasing the widening ratio, it is desirable to form a large number of parallel cuts in a zigzag pattern on the synthetic resin film and then uniaxially stretch or roll-roll.

As the material of the reticulate body, high, medium or low density polyethylene, polypropylene, and other α
Examples include olefin homopolymers or copolymers, modified polyolefins, polycarbonates, polyesters and polyamides. Further, as the base material for lamination,
Papers, cloths, papers obtained by extrusion-laminating low-density polyethylene, various plastic films, metal foils and the like can be used, but are not limited thereto. Further, as the mesh body having a width shrinkage in a direction substantially perpendicular to the tensile force, in addition to the widened split fiber network, the widened split fiber network oblique nonwoven fabric, the widened split film, an oblique extrusion plastic net, a bias There are knitted and woven fabrics, bias nonwoven fabrics, and the like, and the technique of the present invention can be applied to the stabilization of the widthwise dimension thereof.

In order to easily laminate and adhere the above-mentioned widened split fiber network or widened split membrane to the substrate, when the first and second widened split fiber networks are laminated on the same surface of the substrate, the first And the second
In order to easily laminate and bond the widened split fiber networks to each other, at least two kinds of synthetic resin films, which are the raw materials, are selected from synthetic resin A and other synthetic resin B having a lower melting point or softening point than the synthetic resin A. It is a laminated film of at least two layers made of the synthetic resin of. Such a widened split fiber network and a widened split membrane can be easily laminated and bonded to a base material via, for example, an extrusion molten film of a synthetic resin B having a low melting point.

Examples of such resin combinations (A / B) include high density polyethylene / low density polyethylene, polypropylene / ethylene-vinyl acetate copolymer, polyethylene terephthalate / modified polyolefin, polyamide /
Examples include, but are not limited to, modified polyolefins. In addition, when the synthetic resin B is laminated and adhered to the base material in advance, the laminated base material and the multilayer widening split fiber network or the widening split fiber network can be formed by simply pressing under heating. It can be easily laminated and bonded.

[0013]

In the present invention, since the reticulate body having the width shrinkability in the direction substantially perpendicular to the tensile force is laminated on the base material having no width shrinkage, the dimension in the width direction is stabilized. This action is particularly effective not only for stabilizing the width of the cross-laminated split fiber nonwoven fabric, but also for stabilizing the width of the net material such as the widened split fiber net or the widened split membrane. In the case where these reticulate bodies are produced by using a two-layer film composed of two kinds of synthetic resins having different melting points as a material, extrusion melting of the synthetic resin having the lower melting point or the synthetic resin having heat fusion property therewith The film is heat-sealed to the base material and the net-like material, so that they can be easily laminated and bonded.

[0014]

[Film production example] Density 0.956 g / cm ³ , MFR
1.6 g / 10 min high-density polyethylene (manufactured by Nippon Petrochemical Co., Ltd., trade name: Nisseki Stafren E715) was used as an intermediate layer, and the density was 0.924 g / cm ³ , MFR 2.0 g /
10 min of low density polyethylene (Nippon Petrochemical Co., Ltd.)
Made, product name: Nisseki Lexlon F311) with the inner and outer layers as a total thickness of 120 μm, and the thickness ratio of each layer is 15:90:
A 3-layer polyethylene film having a width of 15 and a width of 90 cm was prepared by a coextrusion film manufacturing method.

[0015]

Example 1 The above film was uniaxially stretched 9 times in the longitudinal direction to form a uniaxially stretched film having a thickness of 40 μm and a width of 30 cm, and a splitting tool as described in JP-B-51-38979 was used. After splitting, the fiber was widened three times in the width direction to obtain a widened split fiber network having a width of 90 cm. In addition, the density is 0.
Kraft paper (grammage 78 g / m ² ) obtained by extrusion laminating 20 μm thick low density polyethylene (manufactured by Nippon Petrochemical Co., Ltd., trade name: Nisseki Lexron L501) with 917 g / cm ³ and MFR 7.0 g / 10 min. Then, the widened split fiber net was laminated immediately after the widening and immediately heated and pressed to obtain a net-like laminated material of the present application. The widened split fiber network in this reticulated laminate material was firmly laminated and adhered to the laminated paper and did not exhibit width shrinkage. In addition, the MD strength of the kraft paper was significantly improved by laminating the widened split fiber network.
Further, in the lamination of the widened split fiber network and the laminated paper, since the low density polyethylene layer is present in both layers, they were easily laminated and adhered by simply heating and pressing.

[0016]

Example 2 Instead of the laminated paper in Example 1, double-sided laminated paper in which low-density polyethylene was extrusion-laminated on both sides of kraft paper was used, and a widening split fiber network was formed on each side, and the trunk of each split fiber network. After laminating so that the angle formed by the fiber and the stem fiber would be 30 °, the mixture was heated and pressed to obtain a cross-hatched laminated material of the present application. Not only MD strength but also CD strength was significantly improved in this cross-woven structure of reticulated body, and the strength balance in the longitudinal direction and the width direction was good.

[0017]

The present invention has the following effects. Since the shrinkage of the width-shrinkable mesh body in the width direction can be prevented, the width dimension is stabilized. By diagonally stacking the widened split fiber nets,
It is possible to obtain a reticulated oblique laminate having a stable width dimension and a balanced strength in the longitudinal and width directions. By using the widening split fiber net made of a multilayer film, sandwich lamination with the base material by the extrusion laminating method becomes easy. By using a substrate that has been subjected to extrusion lamination,
The reticulate body and the laminated base material are laminated and bonded by simply heating and pressing.

[Brief description of drawings]

FIG. 1 is a partial plan view of a conventional orthogonal mesh body, showing an enlarged mesh (the same applies hereinafter).

FIG. 2 is a partial plan view of a conventional oblique mesh body.

FIG. 3 is a partial plan view of a first widening split fiber network.

FIG. 4 is a partial plan view of a second widened split fiber network.

FIG. 5 is a partial plan view of a cross-laminated split fiber nonwoven fabric.

FIG. 6 is a vertical cross-sectional view of an example of a diagonal cross-layered material of a mesh body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Longitudinal yarn 2 Widthwise yarn 3 Orthogonal reticulated body 4, 5 Diagonal direction yarn 6 Oblique reticulated body 7 First widening split fiber net 7'Second widening split fibrous net 8 Crosswise laminated split fiber non-woven fabric 9, 9'Stem fiber 10, 10 'Branch fiber 11, 11' Angle of stem fiber group with respect to longitudinal direction 12 Angle formed by stem fiber group 9 and 9'13 Base material

Claims (9)

[Claims] 1. A reticulated material laminate comprising: a reticulated material having a width-shrinking property in a direction substantially perpendicular to a tensile force and a base material having no width-shrinking property. 2. The reticulated body according to claim 1, wherein the reticulated body having a width-shrinking property is a widened split fiber network formed by uniaxially stretching a synthetic resin film, splitting the fibers, and then widening the fiber to a desired width. Laminated material. 3. The reticulate body having the width-shrinking property is obtained by quasi-uniaxially stretching or roll-rolling a synthetic resin film, forming a number of parallel cuts in a zigzag pattern, and then widening it to a desired width. The reticulated body laminate material according to claim 1, which is a widened split film. 4. The synthetic resin film is a multi-layer film comprising at least two layers of at least two kinds of synthetic resin, synthetic resin A and synthetic resin B having a lower melting point or softening point than the synthetic resin A. Alternatively, the reticulated laminate material according to item 3. 5. The reticulated body laminate according to claim 1, wherein the base material is paper or laminated paper in which a synthetic resin is previously laminated on paper. 6. The widened split fiber network or widened split membrane is firstly provided.
Of the reticulated body laminated material, which is a reticulated body, is laminated with a widening split fiber network or a widening dividing membrane as a second reticulation body, and the first reticulation body and the second reticulation body trunk fibers are mutually A reticulated oblique cross-laminated material, which is laminated so as to form a certain angle. 7. The reticulated oblique cross-laminated material according to claim 6, wherein an angle formed by the first reticulated trunk fibers and the second reticulated trunk fibers is in the range of 30 ° to 150 °. 8. The net-like structure cross-laminated material according to claim 6, wherein the first net-like body and the second net-like body are superposed and laminated on the same surface of the base material. 9. The reticulated oblique laminated material according to claim 6, wherein the base material is paper or a laminated paper in which a synthetic resin is laminated on paper in advance.