JP2017087498A - Laminated body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate body excellent in releasability with the material to be contacted and also suppressed in the adhesion of the material to the surface of the laminated body upon peeling.SOLUTION: Provided is a laminated body having a network between base material films, in which the network body being a braided fabric or a woven fabric having a plurality of the first yarns 1 arranged along the first direction and a plurality of the second yarns 2 arranged so as to be crossed to the right-angle direction or oblique direction of the first direction, and in which the higher thickness of the thickness D1 of the first yarn and the thickness D2 of the second yarn 2 is 0.20 mm or higher.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminate.

  Conventionally, rubber materials having adhesiveness such as unvulcanized rubber have been used for various purposes. Such a rubber raw material is processed into a sheet shape, and is transported and stored.

  When the rubber material having the above-described adhesiveness is transported, stored or the like, the rubber material is wound while sandwiching the protective material, and is handled in a roll shape.

  As a laminate used as a protective material used when winding an adhesive rubber material, a release sheet is disclosed in which a release film is subjected to a release treatment on the surface of a rigid film such as a PET film. (For example, refer to Patent Document 1).

JP-A-4-363377

  However, when the release sheet disclosed in Patent Document 1 is used as a protective material, when the release sheet is peeled from the rubber material, the adhesiveness with the rubber material is too high, and the peeling work is performed. Since excessive force is required when performing, there is a problem that workability is low.

  Moreover, in patent document 1, suppression of adhesion to the release sheet of a rubber material is not examined. When the release sheet is used, there is a problem that the rubber material adheres to the surface of the release sheet when the rubber material is peeled off, and the surface of the rubber material is damaged.

  Therefore, development of a laminate that is excellent in releasability and that suppresses material adhesion to the surface during peeling is desired.

  The present invention has been made in view of the above, and provides a laminate that is excellent in releasability from a material to be contacted, and that suppresses adhesion of the material to the surface of the laminate upon peeling. The purpose is to do.

  As a result of intensive studies to achieve the above object, the present inventor is a laminate having a network between base films, and a plurality of the networks are arranged along a first direction. It is a braided or woven fabric having a first yarn and a plurality of second yarns arranged intersecting at right angles or oblique directions with respect to the first direction, and the thickness D1 of the first yarn And it discovered that the said objective could be achieved by making the larger thickness more than specific thickness among thickness D2 of said 2nd yarn, and came to complete this invention.

That is, this invention relates to the following laminated body.
1. A laminate having a network between base films,
The mesh body includes a plurality of first yarns arranged along a first direction and a plurality of second yarns arranged so as to intersect the first direction at right angles or obliquely. Having a braided or woven fabric,
Of the thickness D1 of the first yarn and the thickness D2 of the second yarn, the larger thickness is 0.20 mm or more.
A laminate characterized by the above.
2. Item 2. The laminate according to Item 1, wherein at least one of the plurality of first yarn intervals S1 and the plurality of second yarn intervals S2 is 2.5 to 7.0 mm.
3. Item 3. The laminate according to Item 2, wherein S1 and S2 are 2.5 to 7.0 mm.

  The laminate of the present invention has a network between base films, and the plurality of first yarns arranged along the first direction and the direction perpendicular to the first direction or A braided or woven fabric having a plurality of second yarns arranged crossing each other in an oblique direction, the larger one of the thickness D1 of the first yarn and the thickness D2 of the second yarn Since the thickness of the material is 0.20 mm or more, it is possible to reduce the area that comes into strong contact with the material to be contacted, it is excellent in releasability, and the material adheres to the surface of the laminate during peeling. It is suppressed.

It is a schematic diagram which shows an example of the mesh body which comprises the laminated body of this invention. It is a schematic diagram which shows an example of the mesh body which comprises the laminated body of this invention. It is a schematic diagram which shows the form which evaluates mold release property with a tensile testing machine. It is a schematic diagram which shows the measuring method of the aperture ratio of the mesh body which comprises the laminated body of this invention. It is a schematic diagram which shows the measuring method of the aperture ratio of the mesh body which comprises the laminated body of this invention.

  Hereinafter, embodiments of the present invention will be described in detail.

  The laminated body of the present invention has a network between base films, and the network includes a plurality of first yarns arranged along a first direction, and a direction perpendicular to the first direction. Or, it is a braided or woven fabric having a plurality of second yarns arranged crossing each other in an oblique direction, and is larger among the thickness D1 of the first yarn and the thickness D2 of the second yarn. The thickness of the direction is 0.20 mm or more.

  The laminated body of the present invention having the above characteristics has a larger thickness of 0.20 mm or more among the thickness D1 of the first yarn and the thickness D2 of the second yarn. The difference in height between the first yarn and the second yarn of the network is large, and the unevenness of the laminate of the present invention having the network is sufficient between the base films, and strongly contacts the contact material. Since the area is reduced, excellent releasability can be exhibited. Moreover, even when the laminate having the above-described structure is used as a protective material for a material such as an adhesive rubber material, adhesion of the material to the surface of the laminate is suppressed when peeling from the material. The

(Base film)
It does not specifically limit as a base film, The base film formed with the conventionally well-known resin can be used. Examples of the resin forming the base film include polyester resins, polyolefin resins, polystyrene resins, acrylic resins, urethane resins, and the like. Among these, polyester resins are preferable because they are excellent in rigidity, durability, and heat resistance. Examples of the polyester resin include polyethylene terephthalate (PET).

  The base film may be subjected to a release treatment on the surface opposite to the surface in contact with the mesh. By performing the release treatment, when the laminate of the present invention is used as a protective material for a material such as a rubber material, the releasability is further improved, and the effect of suppressing damage to the surface of the material is further improved. .

  The release treatment of the base film is not particularly limited as long as the release property of the laminate of the present invention can be further improved. For example, a release treatment for forming a release treatment layer containing a crosslinked olefin resin. Etc.

  The thickness of a base film is not specifically limited, 30-120 micrometers is preferable and 50-80 micrometers is more preferable. By setting the thickness of the base film in the above range, a three-dimensional honeycomb pattern (uneven shape) can be clearly formed on the surface of the laminate, and the releasability from the contacting material is further improved. In addition, adhesion of the material to the surface of the laminate can be further suppressed during peeling. In addition, by making the thickness of the base film within the above range, the laminate body is not damaged and the elongation and deformation of the laminate body are suppressed at the time of peeling, and the occurrence of breakage starting from the mesh opening is suppressed. can do.

(Reticulated body)
The net-like body is a member formed in a net-like sheet shape by intersecting yarns (fibers). The net has a plurality of first yarns arranged along the first direction and a plurality of second yarns arranged so as to intersect the first direction at right angles or oblique directions. In this case, a woven fabric or a braided fabric (nonwoven fabric) laminated without being woven may be used.

  The net-like body may be formed in a lattice shape in which a plurality of yarns intersects in two axial directions, for example, the vertical direction and the horizontal direction, or the plurality of yarns have three axial directions or more ( For example, it may be formed in a lattice shape so as to intersect (in the four-axis direction). When a plurality of yarns intersect in the biaxial direction, for example, the axes of each other may intersect at a substantially right angle, or may intersect at an angle smaller than the right angle. Further, for example, when a plurality of yarns intersect in the three axial directions, when the yarn intersects in three directions of the longitudinal direction, the lateral direction and the oblique direction of the mesh body, or the longitudinal direction of the mesh body and the longitudinal direction The case where it cross | intersects three directions of both diagonal directions with respect to a direction is mentioned.

  In the present specification, a net formed by a plurality of yarns intersecting in the biaxial direction is referred to as a “biaxial network”, and a net formed by a plurality of yarns intersecting in the three axial directions. The body is also referred to as a “triaxial network”. Among the meshes, the biaxial fabric is also referred to as “biaxial laminate fabric”, the triaxial fabric is represented as “triaxial laminate fabric”, and the biaxial plain weave fabric is “ The “biaxial plain woven fabric” and the triaxial woven fabric are also referred to as “triaxial woven fabric”.

  The first direction may be a first direction in which one specific type of yarn among the yarns forming the mesh body is the first yarn, and the first yarn is oriented. For example, in the case of a biaxial network, one of the two axes can be set as the first direction. In addition, in the case of a triaxial network, the axial direction of any one of the three axes is the first direction, and the axial direction of the other two axes that are arranged to intersect the first direction obliquely. The oriented yarn becomes the second yarn.

  In the triaxial net-like sheet, the “first direction” may be any direction, but is usually a direction in which a material such as a rubber material is peeled off in a braided or woven fabric. The orientation direction of the yarn oriented in parallel with the first direction may be the first direction.

  The kind of the yarn constituting the network is not particularly limited, and examples thereof include a round filamentary monofilament yarn; a flat yarn which is a uniaxially stretched tape formed of a synthetic resin such as polyolefin resin; and a multifilament yarn. From the viewpoint of productivity and cost, it is preferable to use monofilament yarns and flat yarns. These yarns may be used alone or in combination of two or more. Examples of the structure of the mesh body in which two or more kinds of yarns are mixed and used as the yarn constituting the mesh body include a structure in which a monofilament yarn is used as the first yarn and a flat yarn is used as the second yarn. .

  In the laminate of the present invention, the larger one of the thickness D1 of the first yarn and the thickness D2 of the second yarn forming the net is 0.20 mm or more. When the larger thickness is less than 0.20 mm, the unevenness of the laminate of the present invention having the mesh body between the base films becomes insufficient, and the area that is strongly in contact with the material to be contacted is sufficiently reduced. Cannot be released and the releasability becomes insufficient. Moreover, when the laminated body of this invention is used as a protective material of materials, such as a rubber material which has adhesiveness, adhesion of the material to the surface of a laminated body cannot fully be suppressed at the time of peeling with a material. Of the first yarn thickness D1 and the second yarn thickness D2, the larger thickness is preferably 0.25 mm or more, and more preferably 0.35 mm or more. The larger thickness is preferably 0.50 mm or less, and more preferably 0.40 mm or less. In addition, when said D1 and D2 are the same thickness, the thickness of D1 and D2 should just be 0.20 mm or more.

  In the case where the net is formed by crossing a plurality of yarns in three or more (for example, four-axis directions) directions, different yarns may be used for each axial direction. In this case, any one axial direction is the first direction, and the yarn oriented in the axial direction of the other two or more axes arranged intersecting the first direction is the second yarn. In the present invention, when the thickness of the yarn constituting the second yarn is different for each axial direction, the thickness of the thickest yarn among the yarns constituting the second yarn may be D2. Moreover, what is necessary is just to let the said thickness be D2, when all the yarns which comprise a 2nd yarn are the same thickness.

  The thickness of the yarn is not particularly limited as long as the larger one of the thickness D1 of the first yarn and the thickness D2 of the second yarn is 0.20 mm or more. For example, when using a monofilament yarn, the thickness (wire diameter) of the monofilament yarn is preferably 0.15 to 0.50 mm, more preferably 0.20 to 0.40 mm, and still more preferably 0.20 to 0.35 mm. Moreover, when using a flat yarn, 0.02-0.10 mm is preferable and, as for the thickness of a flat yarn, 0.05-0.09 mm is more preferable. Further, the width of the flat yarn is preferably 0.8 to 2.0 mm, more preferably 1.0 to 1.5 mm. By setting the width of the flat yarn within the above range, the flat yarn can be prevented from cracking and tearing, and variations in the width of the flat yarn during manufacturing can be suppressed.

  The fineness of the yarn is not particularly limited. For example, when a monofilament yarn is used, the fineness of the monofilament yarn is preferably 500 to 1200 dt, and more preferably 600 to 1000 dt. Moreover, when using a flat yarn, the fineness of the flat yarn is preferably 500 to 1500 dt, and more preferably 700 to 1200 dt. By setting the fineness of the yarn within the above range, the mesh body can exhibit an excellent uneven shape.

  The resin forming the yarn is not particularly limited, and examples thereof include polyolefin resins such as polyethylene and polypropylene; polyester resins such as PET; and aramid resins. Among these, PET is preferable in that it can be made into a single material, and polyethylene that can be heat-sealed in advance is preferable in that it does not easily impair the unevenness of the network.

  The yarn is not limited to being composed of one kind of material, and may be composed of a plurality of materials (so-called composite fibers). For example, in the case of a monofilament yarn, it may be a monofilament yarn having a core-sheath structure in which an HDPE layer is disposed in the core portion and an LDPE layer is disposed in the surface layer portion. In the case of a flat yarn, it may be a flat yarn having a three-layer structure in which an HDPE layer is disposed in a core portion and an LDPE layer is disposed on a surface layer portion (layer laminated on both surfaces of the core portion).

  The yarn interval S1 between adjacent yarns of the plurality of first yarns and the yarn interval S2 between adjacent yarns of the plurality of second yarns are not particularly limited as long as the effects of the present invention can be exhibited. For example, when a monofilament yarn is used, S1 and S2 are preferably 2.5 to 7.0 mm, and more preferably 4.0 to 6.0 mm. Moreover, when using a flat yarn, 2.5-7.0 mm is preferable and S1 and S2 have more preferable 2.5-4.0 mm. By setting the thread interval in the above range, the uneven shape of the network is sufficient, so that the unevenness of the laminate of the present invention having the network is sufficient between the base films, and the area that is in strong contact with the material in contact Is reduced and the releasability is further improved. Moreover, when using the laminated body of this invention as a protective material of materials, such as a rubber material which has adhesiveness, adhesion of the material to the surface of a laminated body at the time of peeling with a material can be suppressed more fully.

  In the network constituting the laminate of the present invention, among the yarn interval S1 between adjacent yarns of the plurality of first yarns, and the yarn interval S2 between adjacent yarns of the plurality of second yarns, It is preferable that at least one is 2.5-7.0 mm, and it is more preferable that it is 4.0-6.0 mm. In particular, the distance between the yarns having the larger thickness among the thickness D1 of the first yarn and the thickness D2 of the second yarn is preferably in the above range. With the above configuration, since the uneven shape of the network is sufficient, the unevenness of the laminate of the present invention having the network between the base films is sufficient, and the area that is strongly in contact with the material to be contacted is reduced. , Releasability is further improved. Moreover, when using the laminated body of this invention as a protective material of materials, such as a rubber material which has adhesiveness, adhesion of the material to the surface of a laminated body at the time of peeling with a material can be suppressed more fully. It is more preferable that both S1 and S2 are in the above range.

  When the mesh body is a triaxial mesh body, the oblique angle θ between the first yarn and the second yarn is preferably 45 to 60 °, and more preferably 60 °. By setting the oblique angle θ within the above range, the mesh body is excellent in terms of durability in the peeling direction. The oblique angle θ is an angle indicated by θ in FIG. 1 and is an angle on the apex side. When the mesh body is a biaxial mesh body, the oblique angle θ between the first yarn and the second yarn may be normally 90 °, but is not limited thereto.

  The opening ratio of the net-like body is preferably 40 to 80%, and more preferably 40 to 65%. When the aperture ratio of the network is in the above range, the uneven shape of the network is sufficient, and therefore the unevenness of the laminate of the present invention having the network is sufficient between the base films, and strongly with the material in contact. The contact area is reduced, and the releasability is further improved. Moreover, when using the laminated body of this invention as a protective material of materials, such as a rubber material which has adhesiveness, adhesion of the material to the surface of a laminated body at the time of peeling with a material can be suppressed more fully.

  In the present invention, the aperture ratio indicates the ratio of the through holes 1c in FIGS. 4 and 5, and is a numerical value obtained by the following calculation formula.

Opening ratio (%) = {a / (a + c)} ² × 100
[However, a: clearness (mm), b: number of yarns / inch, c: yarn width (mm),
a = (25.4 / b) −c. ]

  The laminated body of the present invention preferably has a configuration in which the yarn having the larger thickness of the first yarn and the second yarn is in contact with the base film. As such a configuration, there is a configuration in which a yarn is laminated without being woven (nonwoven fabric), and a yarn having a larger thickness is laminated on the base film side. By being the said structure, the unevenness | corrugation of the laminated body of this invention which has a network between base film becomes enough, the area which contacts strongly with the material which contacts is reduced, and a mold release property improves more. In addition, when used as a protective material for a material such as a rubber material having adhesiveness, adhesion of the material to the surface of the laminate can be more sufficiently suppressed when peeling from the material.

  In the laminate of the present invention, the yarn having the larger thickness of the first yarn and the second yarn is woven with the other yarn, and the yarn having the larger thickness is partially a base film. The structure which touches may be sufficient. As such a configuration, a configuration in which the net-like body is a woven fabric in which a first yarn and a second yarn are woven is cited. By being the said structure, an unevenness | corrugation becomes sufficient in both the front and back of a mesh body, and it becomes possible to manufacture without distinguishing the front and back of a mesh body in the case of manufacture of a laminated body.

  The network used in the laminate of the present invention can be produced by a known production method. When the net-like body is a triaxial laminated fabric (nonwoven fabric) composed of a longitudinal axis yarn and an oblique axis yarn, for example, it can be produced by the production method described in Japanese Patent No. 1442884 and Japanese Patent No. 1725947. it can.

  As a manufacturing method in case the said mesh body is a triaxial laminated fabric (nonwoven fabric), the following manufacturing methods are mentioned, for example. That is, a triaxial laminated nonwoven fabric can be manufactured using a laminating apparatus with a vertical axis yarn and an oblique axis yarn. Specifically, the vertical axis yarns are aligned at equal intervals and wound in one axial direction, and at the same time, the horizontal axis yarns are also aligned at equal intervals in the horizontal axis direction. The horizontal axis yarns are arranged in an oblique arrangement by traverse movement to form an oblique axis yarn, and the vertical axis yarn and the oblique axis yarn are stacked. Next, the vertical axis yarn and the oblique axis yarn are pressure-bonded on a heating roll at 115 to 120 ° C., so that a triaxial laminated body integrated into a sheet shape, which is a triaxial network, can be manufactured.

  Moreover, when the mesh body is a biaxial laminated fabric (nonwoven fabric) composed of a vertical axis yarn and a horizontal axis yarn, it can be manufactured, for example, by the manufacturing method described in Japanese Patent No. 1699011.

  As a manufacturing method in case the said mesh body is a biaxial laminated fabric (nonwoven fabric), the following manufacturing methods are mentioned, for example. That is, a biaxially laminated fabric can be manufactured using a laminating apparatus with a vertical axis yarn and a horizontal axis yarn. Specifically, the vertical axis yarns are aligned at equal intervals and wound in one axial direction, and at the same time, the horizontal axis yarns are also aligned at equal intervals in the horizontal axis direction. While transferring the horizontal axis yarn in an aligned state on the conveyor, it is cut with a heat cutter for each predetermined product width. The cut horizontal axis yarn is temporarily pressure-bonded to the belt surface using a large temporary pressure-bonding belt coated with a slightly sticky liquid. Next, the horizontal axis yarn temporarily bonded to the belt surface is transferred to a stacking portion with the vertical axis yarn and stacked. Next, the vertical axis yarn and the horizontal axis yarn are subjected to main pressure bonding on a heating roll of 115 to 120 ° C., and a biaxial laminated body integrated into a sheet shape, which is a biaxial network body, can be manufactured.

  It does not specifically limit as a lamination method which laminates | stacks the said network on a base film, It can laminate | stack by a conventionally well-known lamination method.

  Examples of the laminating method include, for example, a method in which each surface of the network and the substrate film or one of the surfaces is heated and melted and pressure-bonded; Sand laminating method in which it is poured and cooled and bonded; A method in which an acrylic or urethane adhesive is applied to each surface or one of the surfaces of the network and the base film and dried to bond them; And a method of bonding the base film and the base film with a double-sided tape. Among these, from the viewpoint of workability, a method of heat-melting and pressure bonding and a sand laminating method are preferable.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to the aspect of these Examples.

Example 1
As the first yarn, a monofilament yarn having a core-sheath structure in which an HDPE layer is disposed in the core portion and an LDPE layer is disposed in the surface layer portion and having a wire diameter of 0.28 mm and a fineness of 650 dt is prepared as a vertical axis yarn. As the second yarn, a flat yarn having a three-layer structure in which an HDPE layer is arranged in the core and an LDPE layer is arranged in the surface layer and having a yarn width of 1.2 mm, a thickness of 0.07 mm, and a fineness of 750 dt is prepared. Yarn.

  A triaxial laminated nonwoven fabric was prepared using a laminating apparatus with a vertical axis yarn and an oblique axis yarn. Specifically, the vertical axis yarns were aligned at equal intervals and wound in one axial direction, and at the same time, the horizontal axis yarns were also aligned at equal intervals in the horizontal axis direction. The horizontal axis yarns were aligned in an oblique arrangement by traverse movement to form an oblique axis yarn, and the vertical axis yarn and the oblique axis yarn were laminated. Then, the vertical axis yarn and the oblique axis yarn were pressure-bonded on a heating roll at 120 ° C. to prepare a triaxial laminated fabric integrated into a sheet shape, which is a triaxial network.

  As shown in FIG. 1, the prepared mesh body has the adjacent longitudinal yarns alternately bonded to both surfaces of the oblique axis yarns one by one, and the oblique angle θ of the oblique axis yarns is expressed by the vertical axis. It was 60 ° to the yarn. Further, the interval between the vertical axis yarns was 4.80 mm, the interval between the oblique axis yarns was 3.88 mm, and the aperture ratio of the mesh body was 44.0%.

  The prepared net was subjected to sand lamination. Specifically, a non-release treatment surface of a PET film (“Unipeel” (registered trademark) thickness 50 μm manufactured by Unitika Co., Ltd.) having a release treatment on one surface was melted at 310 ° C. Adhesion was performed through an extruded LDPE resin layer, and sand lamination was performed to obtain a primary laminate product.

  Next, the surface on the net side of the primary laminate and the non-release treated surface of the PET film are bonded via an LDPE resin layer melted and extruded at 310 ° C., and subjected to sand lamination. A laminate was produced.

(Example 2)
As the first yarn, a monofilament yarn having a core-sheath structure in which an HDPE layer is arranged in the core portion and an LDPE layer is arranged in the surface layer portion and having a wire diameter of 0.35 mm and a fineness of 940 dt is used as a vertical axis yarn. As the second yarn, a flat yarn having a three-layer structure in which an HDPE layer is arranged in the core portion and an LDPE layer is arranged in the surface portion and having a yarn width of 1.5 mm, a thickness of 0.09 mm, and a fineness of 1110 dt is prepared. It was.

  A biaxial laminated braid was prepared using a laminating apparatus with a vertical axis yarn and a horizontal axis yarn. Specifically, the vertical axis yarns were aligned at equal intervals and wound in one axial direction, and at the same time, the horizontal axis yarns were also aligned at equal intervals in the horizontal axis direction. The horizontal axis yarn was cut with a heat cutter for each predetermined product width while being transferred in a state of being aligned on the conveyor. The cut horizontal axis yarn was temporarily pressure-bonded to the belt surface using a large temporary pressure-bonding belt coated with a slightly sticky liquid. Subsequently, the horizontal axis yarn temporarily bonded to the belt surface was transferred to a stacking portion with the vertical axis yarn and stacked. Next, the vertical axis yarn and the horizontal axis yarn were subjected to main pressure bonding on a heating roll at 120 ° C. to prepare a biaxial laminated fabric integrated into a sheet shape, which was a biaxial network.

  In the prepared network, the vertical axis yarn and the horizontal axis yarn were laminated and pressed from both sides. The vertical yarn distance was 4.73 mm, the horizontal yarn distance was 2.73 mm, and the aperture ratio was 60.1%.

  The prepared net was subjected to sand lamination. Specifically, a non-release treatment surface of a PET film (“Unipeel” (registered trademark) thickness 50 μm manufactured by Unitika Co., Ltd.) having a release treatment on one surface was melted at 310 ° C. Adhesion was performed through an extruded LDPE resin layer, and sand lamination was performed to obtain a primary laminate product.

  Next, the surface on the net side of the primary laminate and the non-release treated surface of the PET film are bonded via an LDPE resin layer melted and extruded at 310 ° C., and subjected to sand lamination. A laminate was produced.

(Example 3)
As the first yarn, a monofilament yarn having a core-sheath structure in which an HDPE layer is arranged in the core portion and an LDPE layer is arranged in the surface layer portion and having a wire diameter of 0.25 mm and a fineness of 1000 dt is used as a vertical axis yarn. As the second yarn, a flat yarn having a three-layer structure in which an HDPE layer is arranged in the core portion and an LDPE layer is arranged in the surface portion and having a yarn width of 1.5 mm, a thickness of 0.08 mm, and a fineness of 1200 dt is prepared. It was.

  Except for the above, in the same manner as in Example 2, a biaxial laminated assembly that was a biaxial network and integrated into a sheet was prepared.

  As shown in FIG. 2, the prepared reticulate body had the adjacent vertical yarns alternately bonded to both sides of the horizontal yarn. The vertical yarn distance was 5.39 mm, the horizontal yarn distance was 3.58 mm, and the aperture ratio was 67.3%.

  A laminate was manufactured in the same manner as Example 2 except for the above.

Example 4
As a first yarn, a flat yarn having a thread width of 1.5 mm, a thickness of 0.09 mm, and a fineness of 1110 dt having a three-layer structure in which an HDPE layer is disposed in a core portion and an LDPE layer is disposed in a surface layer portion is used as a vertical yarn. . Further, as the second yarn, a monofilament yarn having a core-sheath structure in which an HDPE layer is disposed in the core and an LDPE layer is disposed in the surface layer and having a wire diameter of 0.35 mm and a fineness of 940 dt is used as a horizontal axis yarn.

  After winding the vertical axis yarn as a beam for weaving, a plain weaving machine was used to plain weave into a biaxial plain weave fabric using a vertical weaving machine and a horizontal axis yarn. Subsequently, the vertical axis yarn and the horizontal axis yarn were pressure-bonded on a heating roll at 120 ° C. to prepare a biaxial plain woven fabric integrated into a sheet shape, which was a biaxial network.

  The prepared mesh body had a vertical axis yarn interval of 2.73 mm, a horizontal axis yarn interval of 4.73 mm, and an aperture ratio of 60.1%.

  The prepared net was subjected to sand lamination. Specifically, a non-release treatment surface of a PET film (“Unipeel” (registered trademark) thickness 50 μm manufactured by Unitika Co., Ltd.) having a release treatment on one surface was melted at 310 ° C. Adhesion was performed through an extruded LDPE resin layer, and sand lamination was performed to obtain a primary laminate product.

  Next, the surface on the net side of the primary laminate and the non-release treated surface of the PET film are bonded via an LDPE resin layer melted and extruded at 310 ° C., and subjected to sand lamination. A laminate was produced.

  A laminate was manufactured in the same manner as Example 2 except for the above.

(Example 5)
As a first yarn, a flat yarn having a thread width of 1.5 mm, a thickness of 0.08 mm, and a fineness of 1200 dt having a three-layer structure in which an HDPE layer is disposed in a core portion and an LDPE layer is disposed in a surface layer portion is used as a vertical yarn. . As the second yarn, a monofilament yarn having a core diameter of 0.25 mm and a fineness of 1000 dt having a core-sheath structure in which an HDPE layer is arranged in the core portion and an LDPE layer is arranged in the surface layer portion was used as a horizontal axis yarn.

  Except for the above, in the same manner as in Example 4, a biaxial plain woven fabric that was a biaxial network and was integrated into a sheet was prepared.

  The prepared mesh body had a vertical axis yarn spacing of 3.58 mm, a horizontal axis yarn spacing of 5.39 mm, and an aperture ratio of 67.3%.

  A laminate was manufactured in the same manner as in Example 4 except for the above.

(Comparative Example 1)
A laminate was prepared in the same manner as in Example 1 except that a PET film (“Unipeel” (registered trademark) thickness 200 μm, manufactured by Unitika Ltd.) having a release treatment applied to one surface was used instead of the net-like body. .

(Comparative Example 2)
As a first yarn, a flat yarn having a thread width of 1.2 mm, a thickness of 0.07 mm, and a fineness of 750 dt having a three-layer structure in which an HDPE layer is disposed in a core portion and an LDPE layer is disposed in a surface layer portion is used as a vertical yarn. . Further, as the second yarn, the same flat yarn as the first yarn was prepared and used as the oblique axis yarn. Other than that was carried out similarly to Example 1, and prepared the triaxial laminated fabric which was a triaxial network body integrated in the sheet form.

  As in FIG. 1, the prepared mesh body has the adjacent vertical axis yarns alternately bonded to both sides of the oblique axis yarns one by one, and the oblique angle of the oblique axis yarn is the vertical axis yarn. The angle was 60 °. Further, the interval between the vertical axis yarns was 3.88 mm, the interval between the oblique axis yarns was 3.88 mm, and the aperture ratio of the mesh was 33.9%.

  A laminate was manufactured in the same manner as in Example 1 except for the above.

(Comparative Example 3)
As a first yarn, a flat yarn having a thread width of 0.8 mm, a thickness of 0.05 mm, and a fineness of 330 dt having a three-layer structure in which an HDPE layer is disposed in a core portion and an LDPE layer is disposed in a surface layer portion is used as a vertical yarn. . Further, as the second yarn, the same flat yarn as the first yarn was prepared and used as the oblique axis yarn. Other than that was carried out similarly to Example 1, and prepared the triaxial laminated fabric which was a triaxial network body integrated in the sheet form.

  As in FIG. 1, the prepared mesh body has the adjacent vertical axis yarns alternately bonded to both sides of the oblique axis yarns one by one, and the oblique angle of the oblique axis yarn is the vertical axis yarn. The angle was 60 °. Further, the interval between the vertical axis yarns was 4.28 mm, the interval between the oblique axis yarns was 4.28 mm, and the aperture ratio of the mesh was 52.0%.

  A laminate was manufactured in the same manner as in Example 1 except for the above.

(Comparative Example 4)
As a first yarn, a flat yarn having a thread width of 1.4 mm, a thickness of 0.09 mm, and a fineness of 1050 dt having a three-layer structure in which an HDPE layer is disposed in a core portion and an LDPE layer is disposed in a surface layer portion is used as a vertical yarn. . Further, as the second yarn, the same flat yarn as that of the first yarn was prepared and used as the horizontal axis yarn. Other than that was carried out similarly to Example 2, and prepared the biaxial laminated body fabric which was a biaxial network body integrated in the sheet form.

  In the prepared network, the vertical axis yarn and the horizontal axis yarn were laminated and pressed from both sides. The vertical yarn distance was 2.83 mm, the horizontal yarn distance was 2.83 mm, and the aperture ratio was 44.8%.

  A laminate was manufactured in the same manner as Example 2 except for the above.

(Comparative Example 5)
As a first yarn, a flat yarn having a thread width of 1.0 mm, a thickness of 0.04 mm, and a fineness of 350 dt having a three-layer structure in which an HDPE layer is disposed in a core portion and an LDPE layer is disposed in a surface layer portion is used as a vertical yarn. . Further, as the second yarn, the same flat yarn as that of the first yarn was prepared and used as the horizontal axis yarn. Other than that was carried out similarly to Example 4, and prepared the biaxial plain woven fabric which was a biaxial network body integrated in the sheet form.

  The prepared mesh body had a vertical axis yarn interval of 2.18 mm, a horizontal axis yarn interval of 2.18 mm, and an aperture ratio of 46.9%.

  A laminate was manufactured in the same manner as in Example 4 except for the above.

  The following evaluation was performed about the laminated body of each Example and the comparative example.

<Releasability>
The peel strength was measured and the releasability was evaluated by the following procedure. That is, a butyl tape No. 4420 (product name) (thickness 0.75 mm, width 50 mm) manufactured by Hitachi Maxell Corporation for waterproofing on the surface of the laminate is parallel to the longitudinal axis of the mesh of the laminate. And a 5 kg SUS plate as a weight, and allowed to stand on a flat surface for 1 hour.

  Next, test lines were prepared by drawing marked lines at intervals of 50 mm on a protective paper of butyl tape, and peeling the butyl tape to a position 30 mm away from the marked line.

  Using the above test piece, the peel strength was measured with a tensile tester Tensilon manufactured by Toyo Seiki Seisakusho. Specifically, as shown in FIG. 3, the laminate is fixed to the lower fixed chuck portion of the tensile tester so that the vertical axis of the mesh is in the vertical direction, and the test piece is peeled off in advance. The left butyl tape was fixed to the upper movable chuck portion.

  Next, peeling is performed under the conditions of a distance between chucks of 200 mm and a pulling speed of 200 mm / min, and fluctuations between the marked lines of 50 mm are recorded on chart paper, and an average of 10 points in total of 5 points on the maximum value side and 5 points on the minimum value side. The value was a measured value of peel strength.

  In addition, when using the laminated body of Example 4 and 5 as a protective material of materials, such as a rubber material, it is used so that the peeling direction of material may become parallel to the orientation direction of the horizontal axis | shaft yarn of a net-like body. For this reason, the butyl tape is laminated in parallel with the orientation direction of the horizontal axis yarn of the mesh body, and the direction from the fixed chuck on the lower side of the Tensilon to the upper movable chuck portion is parallel to the orientation direction of the horizontal axis yarn of the mesh body. The test piece was set so that

<Evaluation of material adhesion>
After the evaluation of releasability, the amount of butyl rubber remaining on the surface of the test piece used in each of the examples and comparative examples was visually observed and evaluated according to the following evaluation criteria.
1: Little adhesion of butyl rubber 2: Little adhesion of butyl rubber 3: Little adhesion of butyl rubber 4: Many adhesion of butyl rubber 5: Very much adhesion of butyl rubber

  The results are shown in Table 1.

DESCRIPTION OF SYMBOLS 1 ... Vertical axis | shaft yarn 2 ... Oblique axis | shaft yarn 3 ... Vertical axis | shaft yarn 4 ... Horizontal axis | shaft yarn 5 ... Fixed chuck | zipper part 6 of the lower side of a tensile testing machine ... Butyl tape h
7 ... Mesh body 8 ... Upper movable chuck portion 1b ... 1st yarn 1a, 1d ... 2nd yarn 1c intersecting the first yarn 1b in a direction perpendicular to or oblique to it ... An opening (through hole)
DESCRIPTION OF SYMBOLS 1A ... Yarn row | line 1B which arranged many yarn 1a, 1a ...... Yarn row | line | column 1D which arranged many yarn 1b, 1b ...... Yarn row | line | column which arranged many yarn 1d, 1d ...

Claims (3)

A laminate having a network between base films,
The mesh body includes a plurality of first yarns arranged along a first direction and a plurality of second yarns arranged so as to intersect the first direction at right angles or obliquely. Having a braided or woven fabric,
Of the thickness D1 of the first yarn and the thickness D2 of the second yarn, the larger thickness is 0.20 mm or more.
A laminate characterized by the above.   2. The laminate according to claim 1, wherein at least one of the plurality of first yarn intervals S <b> 1 and the plurality of second yarn intervals S <b> 2 is 2.5 to 7.0 mm. .   The laminate according to claim 2, wherein the S1 and the S2 are 2.5 to 7.0 mm.