JP2020015216A - Laminate - Google Patents

Abstract

To provide a laminate that can be suitably used for the situations requiring air permeability and flexibility as well as antibacterial and fungicidal actions.SOLUTION: A laminate 10 has a porous support 11, a porous metal member 12, and a fibrous connection member 13 disposed between the support 11 and metal member 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminate that can be suitably used for applications requiring air permeability and flexibility in addition to an antibacterial and sterilizing action.

  It is known that metal members such as copper and silver have an antibacterial and sterilizing action (for example, see Non-Patent Document 1 below). The metal member is used for various applications, but in order to impart air permeability and flexibility in addition to the antibacterial and sterilizing effects, a method of directly electroless copper plating on cloth (for example, see Patent Document 1 below) In some cases, a cloth knitted by knitting with a silver thread made of a silver-plated fiber and a thread made of a natural fiber may be used (for example, see Patent Document 2 below).

JP-A-3-97901 JP 2008-150741 A

Makoto Kumada and 5 others “Antibacterial properties of copper surfaces” Journal of Copper and Brazing Technology Vol. 40 No. 1 (2001) p. 122-127

  However, when plated directly on a cloth, the yarns are fixed to each other and the flexibility is reduced. In addition, when copper or silver is plated on the fiber, the type of the fiber itself is limited, the method of plating is complicated, the work of fabricating the cloth is added, and the cost increases. Therefore, in applications that require air permeability and flexibility in addition to the antibacterial and bactericidal actions, a member that replaces plated fibers or the like is required.

  An object of the present invention is to provide a laminate that can be suitably used for applications that require air permeability and flexibility in addition to antibacterial and sterilizing actions.

  The laminate according to the present invention includes a porous support, a porous metal member, and a fibrous connection member disposed between the support and the metal member.

  In the laminate according to the present invention, air permeability and flexibility can be ensured by using a porous support, a porous metal member, and a fibrous connection member. Further, in the laminate according to the present invention, by using a porous metal member, it is possible to exert an antibacterial and sterilizing action not only on the surface of the metal member but also on the inner wall surface of a hole in the metal member. , A suitable antibacterial and bactericidal action can be obtained. The laminate as described above can be suitably used for applications requiring air permeability and flexibility in addition to the antibacterial and sterilizing actions (for example, articles that come into contact with or approach a living body).

  Advantageous Effects of Invention According to the present invention, it is possible to provide a laminate that can be suitably used for applications requiring air permeability and flexibility in addition to an antibacterial and sterilizing action (for example, articles that come into contact with or approach a living body).

It is a schematic cross section which shows an example of a laminated body. It is a schematic cross section which shows an example of a laminated body. It is a schematic cross section which shows an example of a laminated body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, the same reference numerals denote the same parts in different drawings, and a description thereof may be omitted. The preferable range of the thickness of each member can be applied both before and after lamination of each member.

  In this specification, a numerical range indicated by using “to” indicates a range including numerical values described before and after “to” as a minimum value and a maximum value, respectively. In the numerical ranges described stepwise in this specification, the upper limit or the lower limit of a numerical range in one step can be arbitrarily combined with the upper limit or the lower limit of a numerical range in another step. “A or B” may include one of A and B, and may include both. The materials exemplified in the present specification can be used alone or in combination of two or more, unless otherwise specified. The term "step" is included in the term as well as an independent step, even if it is not clearly distinguishable from other steps, provided that the intended action of that step is achieved.

In this specification, the air permeability can be measured by the JIS L 1096 A method (Fragile method). According to the quality standard of the Futon Land Distribution Association, the upper limit of the air permeability is specified for each type of fabric. Among them, the lowest value is a blend of polyester and cotton, which is 2 cm ³ / cm ² / s. Therefore, in the laminate according to the present embodiment, it was considered that if the minimum value of the futon cloth is 2 cm ³ / cm ² / s or more, sufficient air permeability can be secured.

In this specification, the bending resistance can be measured by the JIS L 1096 8.21 B method (slide method). That is, first, a test piece of 2 cm × about 15 cm is prepared. Further, the mass W per unit area of the test piece (unit: mN / cm ² = gf / cm ² ) is measured. Next, a slide-type testing machine having a fixed base and a movable base (for example, a jack) adjacent to the fixed base and having a variable height is prepared, and the heights of the main surfaces of the fixed base and the movable base are aligned. Subsequently, the test piece is placed on a surface constituted by the main surfaces of the fixed table and the movable table, and then a weight is attached on the test piece of the fixed table to fix the test piece. This weight is arranged so as to slightly overlap the moving table. At this time, the length L (unit: cm) of the test piece located on the moving table (the length from the boundary between the moving table and the fixed table to the tip of the test piece) is measured. Next, the moving table is gradually lowered, and the height difference δ (unit: cm) between the fixed table and the moving table when the tip of the test piece is separated from the moving table is measured. Then, the bending resistance B _τ (unit: mN · cm = gf · cm) is determined by the following equation. The bending resistance is expressed as a bending moment with respect to a unit curvature for a unit width of the test piece.

  The laminate according to the present embodiment includes a porous support, a porous metal member, and a fibrous connection member disposed between the support and the metal member. A member different from the connection member may be further arranged between the support and the metal member.

  The laminate according to the present embodiment can be suitably used for applications requiring air permeability and flexibility in addition to the antibacterial and sterilizing effects. Examples of such applications include articles that come into contact with living bodies (for example, humans, animals, and the like), and specifically, clothing such as masks, socks, shirts, hats, gloves, belts, bandages, eye patches, and the like. Mats; sheets; covers; pillows and the like.

  By the way, if a member having low air permeability is brought into contact with the skin for a long period of time, the skin may be stuffy, causing discomfort and causing dermatitis. On the other hand, since the laminate according to the present embodiment has good air permeability, even when the laminate is brought into contact with the skin for a long period of time, it suppresses the skin from becoming stuffy and causing discomfort and causing dermatitis. it can.

  Further, it is preferable that an article that comes into contact with a living body can appropriately retain moisture from the viewpoint of moisture retention. In this regard, in the laminate according to the present embodiment, moisture can be retained in the porous support.

  FIG. 1 is a schematic cross-sectional view illustrating an example of the laminate. The laminate 10 includes a porous support 11, a porous metal member 12, and a fibrous connection member 13 arranged between the support 11 and the metal member 12. The support 11 and the connection member 13 are in contact with each other. The metal member 12 and the connection member 13 are in contact with each other.

  As a porous support, a fibrous base material can be used. By using the fibrous base material, the air permeability and flexibility of the laminate can be ensured. As the fibrous base material, for example, cloth used for clothes, bed sheets, and the like can be used. Examples of the cloth material (fiber type) include cotton, silk, hemp, mohair, wool, cashmere, acetate, cupra, rayon, nylon, polyurethane, polyester, and regenerated fibers (for example, regenerated cellulose fibers). Even when the support is in contact with the skin for a long time, the support is preferably made of cotton, silk, and regenerated fibers (for example, cellulose) from the viewpoint that the skin is easily stuffed and uncomfortable and dermatitis is easily suppressed. At least one selected from the group consisting of regenerated fibers). The melt viscosity of the support is preferably higher than that of the connection member.

The air permeability of the support is preferably 50 cm ³ / cm ² / s or more in order to secure the air permeability of the laminate.

  The thickness of the support is preferably 300 μm or less for securing the flexibility of the laminate, but is preferably 30 μm or more for securing the durability. From these viewpoints, the thickness of the support is preferably 30 to 300 μm.

  As the porous metal member, a member having a hole communicating from one surface to the other surface of the metal member can be used. The metal member can have a plurality of through holes, and can have a plurality of through holes penetrating from one surface to the other surface of the metal member. The plurality of through holes are, for example, substantially parallel to each other.

  The hole of the porous metal member is preferably a circular shape having no corner serving as a starting point of tearing from the viewpoint of easily securing durability. Further, the hole diameter is preferably 200 μm or less. The arrangement of the holes is not particularly limited, and examples thereof include a lattice shape and a honeycomb shape.

  The aperture ratio of the porous metal member is preferably from 10 to 60% from the viewpoint of easily securing durability and the viewpoint of easily securing air permeability and flexibility.

  Examples of the metal of the metal member include copper, silver, and alloys thereof. The metal member is preferably a metal having a high antibacterial and sterilizing effect, and preferably contains at least one selected from the group consisting of copper and copper alloy, which are relatively inexpensive. As the metal member, a relatively inexpensive metal foil can be used. As the metal foil, a material obtained by forming a hole in an electrolytic copper foil can be used. As the metal foil, a metal foil described in Japanese Patent No. 5640396 may be used. As a specific example, for example, there is a TH-2000 series (for example, TH-2090) which is a functional foil manufactured by Hitachi Chemical Co., Ltd.

The air permeability of the metal member is preferably at least 300 cm ³ / cm ² / s in order to ensure the air permeability of the laminate.

  The thickness of the metal member is preferably 5 μm or more from the viewpoint of durability and handleability, and is preferably 50 μm or less from the viewpoint of securing flexibility. From these viewpoints, the thickness of the metal member is preferably 5 to 50 μm.

  The fibrous connecting member disposed between the support and the metal member ensures the air permeability, flexibility and handleability of the laminate, and also ensures the close contact between the support and the metal member. The connecting member can be formed by applying an adhesive to the support and / or the metal member. However, by using a fibrous connecting member, a laminate having particularly excellent air permeability can be obtained.

  Examples of the material of the connection member include a thermoplastic resin and the like, and nylon, polyethylene, polyvinyl chloride containing a thermoplastic agent, polyamide, polyurethane, polyester, and the like can be used. Preferably, the melt viscosity of the connecting member is lower than that of the support.

The fibrous connection member may include a nonwoven fabric from the viewpoint of ensuring the air permeability and flexibility of the laminate. The support and the metal member can be easily joined by the connection member by heat-pressing with the connection member including the nonwoven fabric disposed between the support and the metal member. Further, the fibers of the fibrous base material are fixed to each other, and the lint due to fraying when the fibers are cut can be suppressed. The basis weight of the nonwoven fabric is, for example, 0.5 to 15 g / m ² . A commercially available product (trade name: spider web sheet) such as Nippon Vilene Co., Ltd. or Nitto Bo Co., Ltd. can be used as the connection member including the nonwoven fabric.

The air permeability of the laminate according to the present embodiment is 2 cm ³ from the viewpoint that even when the laminate is brought into contact with the skin for a long time, the skin is easily stuffed to cause discomfort and to suppress dermatitis. / Cm ² / s or more is preferable.

  The rigidity of the laminate according to the present embodiment is preferably 100 mN · cm or less in order to reduce discomfort even when the laminate is brought into contact with the skin for a long time.

  The method for manufacturing a laminate according to this embodiment includes a laminate production step of arranging a fibrous connection member between a porous support and a porous metal member to obtain a laminate. As the fibrous connection member, the same member as the connection member of the laminate according to the present embodiment can be used. For example, a connection member including a nonwoven fabric can be used. In the laminate production step, each member can be laminated by thermocompression bonding. For example, when bonding the connection members by ironing, the support is pressed at about 160 ° C. when using a low heat-resistant polyester cloth (for example, Tetron cloth), and at about 200 ° C. when using a high heat-resistant cotton cloth. it can. When performing thermocompression bonding, the connection member made of a thermoplastic resin may ooze out of the hole of the porous metal member and adhere to heating means, for example, an iron or an ironing board, which makes thermocompression bonding difficult. is there. For this reason, it is preferable to perform thermocompression bonding in a state where a shielding member (for example, release paper) that is easily peeled off after thermocompression bonding is arranged between the member to be a laminate and the heating means.

  After laminating two members of the support, the connection member, and the metal member, the remaining members may be laminated, or the support, the connection member, and the metal member may be laminated simultaneously. The laminate production step may be a step of arranging a connection member between a porous support and a porous metal member to obtain a laminate, but may cause wrinkles or the like. Therefore, in the laminate production step, a laminate may be obtained by laminating a metal member on the connection member in a state where the support and the connection member are laminated. That is, the metal member may be thermocompression-bonded to the support member in which the connection member is thermocompression-bonded in advance. In the case of mass production, there is a method in which each component is bonded with a hot roll while applying tension. In the laminate according to the present embodiment, a metal member having high rigidity is arranged on one side and a flexible fibrous support is arranged on the opposite side, so that there is no warpage and the handleability is excellent.

  In the laminate according to the present embodiment, each of the support and the connection member may be a single layer or a plurality of layers. The laminate according to the present embodiment may have at least one laminated portion including a support, a metal member, and a connection member. A member may be further provided. For example, the laminate according to the present embodiment may include a porous support on the side of the metal member opposite to the connection member. Specifically, the laminate 20 shown in FIG. 2 has a structure in which the connection member and the porous support are arranged on the metal member surface of the laminate having the same structure as the laminate 10 described above. . The laminate 20 includes a porous support 21a, a porous metal member 22, a fibrous connection member 23a disposed between the support 21a and the metal member 22, and a connection member 23a of the metal member 22. Has a fibrous connecting member 23b and a porous support 21b which are sequentially arranged on the opposite side. This structure reduces air permeability and flexibility, but is preferable for applications in which the metal member is not exposed on the surface, and can be expected to improve tensile strength.

  The method for manufacturing a laminate according to this embodiment may further include a step of sewing the support and the metal member after the step of producing the laminate. An example is shown in FIG. The laminated body 30 is obtained by arranging a support on the metal member surface of the laminated body having the same structure as the above-described laminated body 10 and suturing the outer periphery with a thread. The laminate 30 includes a porous support 31a, a porous metal member 32, a fibrous connection member 33 disposed between the support 31a and the metal member 32, and a connection member 33 of the metal member 32. Has a porous support 31b disposed on the opposite side, and the outer periphery of the laminate 30 is sewn with a thread 34. Since the support 31b is fixed to the laminate having the same structure as the laminate 10 only at the stitched portion, it is expected that the breathability and the flexibility are improved as compared with the laminate 20 described above.

  Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited to the following Examples.

As a laminate having air permeability and flexibility in addition to the antibacterial and bactericidal actions, a laminate having the configuration shown in FIGS. First, the following support, metal member, and connection member were prepared as constituent members of the laminate. A lawn cloth (thickness: about 100 μm, air permeability: 62.6 cm ³ / cm ² / s), which is a thin cotton cloth, was used as a support. As a porous metal member (a metal member having a plurality of parallel through holes penetrating from one surface to the other surface), a functional foil manufactured by Hitachi Chemical Co., Ltd., which is a copper foil having a through hole (trade name: TH- 2090, thickness: 8 μm, pore diameter: 90 μm, aperture ratio: 34%, air permeability: 484 cm ³ / cm ² / s). Spider web sheet (trade name: 13 μm ² , weight: 13 g / m ² , manufactured by Japan Vilene Co., Ltd.) having a nonwoven fabric of a thermoplastic resin (nylon) disposed on release paper as a connection member 698 cm ³ / cm ² / s).

(Example 1)
The laminate 10 shown in FIG. 1 was produced. The above-mentioned connecting member was arranged on the surface of the above-mentioned support, and further, release paper was arranged thereon and thermocompression-bonded. Subsequently, the release paper was peeled off to obtain a laminate A in which the support and the connecting member were bonded. A metal member was arranged on the surface of the connecting member, release paper was arranged thereon, and thermocompression bonding was performed. Finally, the release paper was peeled off to obtain a laminate 10.

(Example 2)
The laminate 20 shown in FIG. 2 was produced. A laminate 20 was obtained by arranging the connection member surface of the laminate A described above so as to overlap the metal member surface of the laminate 10 of Example 1 and thermocompression bonding.

(Example 3)
The laminate 30 shown in FIG. 3 was produced. The support described above was arranged on the metal member surface of the laminate 10 of Example 1, and the outer peripheral portion was sewn with a thread to obtain a laminate 30.

The air permeability and the softness were measured using the obtained laminate.
First, the air permeability of the above-mentioned laminated body 10 was 29 to 40 cm ³ / cm ² / s, the air permeability was secured, and the softness was 1.1 to 2.6 mN · cm.
Next, the air permeability of the laminate 20 was 20 to 30 cm ³ / cm ² / s, and the bending resistance was 10 to 17 mN · cm. As a matter of course, as compared with the laminate 10, the air permeability and the flexibility were reduced, but the air permeability was secured and a certain degree of flexibility was obtained.
The air permeability of the laminate 30 was 24 to 33 cm ³ / cm ² / s, and the stiffness was 5.7 to 16.0 mN · cm. The air permeability and flexibility were improved as compared with the laminate 20.

  10, 20, 30 ... laminated body, 11, 21a, 21b, 31a, 31b ... support, 12, 22, 32 ... metal member, 13, 23a, 23b, 33 ... connection member, 34 ... thread.

Claims (4)

  A laminate comprising: a porous support; a porous metal member; and a fibrous connection member disposed between the support and the metal member.   The laminate according to claim 1, further comprising a porous support on the metal member on a side opposite to the connection member.   The laminate according to claim 1, wherein the connection member includes a nonwoven fabric.   The laminate according to any one of claims 1 to 3, wherein the metal member includes at least one selected from the group consisting of copper and a copper alloy.

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