JP2000310023A - Pressure sensitive adhesive sheet and joint processing method of backing material using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint processing method without damaging finished material by laminating net-like reinforcing material with the covering rate set to a fixed value and tensile strength set over a fixed value on the one face of acrylic adhesive layer with elongation set over a fixed value. SOLUTION: An acrylic monomer composition is uniformly mixed, and it is spread on a mold release processed PET film to manufacture an acrylic pressure sensitive adhesive sheet. Next, a net-like reinforcing member is laminated thereon to be a pressure sensitive adhesive sheet. In the acrylic pressure sensitive adhesive sheet, elongation prescribed by JIS Z0237 is set to be over 100%, the tensile strength of the net-like reinforcing member is set to be over 5 kg/50 mm, and it covers 10-80% of the adhesive layer face. The surface end edge of backing material 1 such as adjoining concrete is filled with caulking material 2 or the like to be flush, and after sticking the pressure sensitive adhesive tape 3, a decorative sheet is stuck thereon, or it is decorated by finishing material by painting. Hereby, by a simple work, a crack or creases can be prevented from generating due to expansion/contraction of the backing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive sheet and a method for treating a seam of a base material using the same.

[0002]

2. Description of the Related Art Conventionally, when exterior and inner walls of a building are subjected to decorative finishing, as shown in FIG. 4, a seam 11 of a base material 1 is usually filled with a putty or a caulking material 2 and then painted or wallpapered. Has been applied to finish 4. In these makeup finishing methods, due to changes in climate such as temperature and humidity,
Alternatively, due to the stretching force applied to the putty or the caulking material at the joints due to various vibrations, cracks 5 or defects are generated in the putty or the caulking material 2 itself, causing wrinkles or cracks in the paint film or wallpaper. There was a problem that entered.

As a method for solving the above-mentioned problem in a joint portion of a base material joined by abutting end surfaces thereof, the present applicant has previously disclosed in Japanese Patent Application Laid-Open No. An outer wall board joint treatment material having an adhesive layer provided with a fixed gap or a fluidized layer at a position corresponding to the gap between the outer wall boards, which is adhered so as to straddle both end edges, is applied to both ends of the outer wall board. Affixed to the edge, so as to cover the outer wall board seam treatment material,
The present invention has disclosed and disclosed a seam treatment method between outer wall boards in which an elastic putty material is applied to the surface of an outer wall board so as to make the surface smooth, and then a finish coating is performed.

[0004] In the above-mentioned seam treatment method between outer wall boards, by providing a fixed gap or a fluidized layer with a smaller width in the adhesive layer, it is possible to prevent the adhesion layer and the reinforcing layer from being fixed and to cope with large elongation. It was made. Therefore,
At least insulation from the external environment was achieved, but once the seam treatment material was opened, it was difficult to return to the original condition. Or

Further, it is necessary that a certain gap or a fluidized layer of the pressure-sensitive adhesive layer provided on the seam treatment material be accurately stuck on the seam between the outer wall boards, and as the width of the seam treatment material becomes narrower. However, it takes some skill to attach to the above-mentioned position, and there is also a limitation on the place of application.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and has as its object to expand and contract following expansion and contraction at joints of a base material, and to expand and contract the base material. It is an object of the present invention to provide a pressure-sensitive adhesive sheet that insulates a finishing material and does not damage a finishing material, and a method for easily and reliably performing a joint processing method for a base material using the same.

[0007]

According to the first aspect of the present invention, there is provided a pressure-sensitive adhesive sheet according to the first aspect of the present invention, which is provided on one surface of an acrylic pressure-sensitive adhesive layer having an elongation (at the time of cutting) of 100% or more as specified in JIS Z 0237. The specified tensile strength is 5k
g / 50 mm or more of a net-shaped reinforcing member is laminated, and 10 to 80% of the surface of the pressure-sensitive adhesive layer is covered.

According to a second aspect of the present invention, there is provided a seam treatment method for a base material, in which a decorative sheet or a paint is applied on the base material, and a joint portion of the base material joined by abutting adjacent end faces. The pressure-sensitive adhesive sheet according to claim 1 is stuck on the surface on which the net-like reinforcing member is not laminated, over the ends of both base materials including the base material.

[0009] JIS Z 0237 of the acrylic pressure-sensitive adhesive layer used in the pressure-sensitive adhesive sheet according to the first aspect of the present invention.
If the elongation (at the time of cutting) specified by is less than 100%,
Since the pressure-sensitive adhesive sheet cannot sufficiently follow the expansion and contraction of the base material joint, the pressure-sensitive adhesive sheet peels off from the application surface of the base material joint, and the pressure-sensitive adhesive sheet cracks, the content is limited to 100% or more.

If the thickness of the acrylic pressure-sensitive adhesive layer is too small, it cannot follow the expansion and contraction of the joint of the base material sufficiently. If the thickness is too large, the step between the acrylic pressure-sensitive adhesive layer and the base material becomes large, and the surface of the finished material becomes large. Is preferably 0.03 to 2 mm, since the appearance is significantly deteriorated, for example, by projecting into the shape.

The acrylic pressure-sensitive adhesive is not particularly limited as long as it satisfies the physical properties described above. For example, the pressure-sensitive adhesive is mainly composed of an alkyl (meth) acrylate having 1 to 14 carbon atoms, and has a functional group. An acrylic copolymer obtained by copolymerizing a modifying monomer or the like having a monomer and cross-linking with a cross-linking agent as necessary. The monomer may be copolymerized with an olefin polymer having a polymerizable unsaturated double bond at a terminal in order to improve adhesion to a net-like reinforcing member described later.

As the alkyl (meth) acrylate having 1 to 14 carbon atoms, for example, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate,
Examples include 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, n-octyl (meth) acrylate, lauryl (meth) acrylate, and isomyristyl (meth) acrylate.

Examples of the modifying monomer include a carboxyl group-containing monomer such as acrylic acid, maleic acid, fumaric acid, and itaconic acid, or an anhydride thereof, acrylonitrile, for the purpose of improving the cohesive force of the pressure-sensitive adhesive. N
-Nitrogen-containing monomers such as vinylpyrrolidone, N-vinylcaprolactam, acryloylmorpholine, (meth) acrylamide, dimethylaminoethyl acrylate, dimethylaminopropylacrylamide, 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl acrylate, caprolactone-modified ( Examples include hydroxyl group-containing monomers such as (meth) acrylate, polyoxyethylene (meth) acrylate, and polyoxypropylene (meth) acrylate.

Examples of the olefin polymer having a polymerizable unsaturated double bond at a terminal include an ethylene-butylene random copolymer and an ethylene-propylene copolymer which can be copolymerized with other polymerizable monomers at the terminal. An olefin polymer having a polymer structure composed of a suitable double bond and an olefin main skeleton.

Examples of the crosslinking agent for the acrylic copolymer include an isocyanate crosslinking agent, an epoxy crosslinking agent and an aziridine crosslinking agent. When the acrylic copolymer having a crosslinked structure is obtained by bulk polymerization in a photopolymerization method using ultraviolet rays, a monomer having two or more copolymerizable unsaturated double bonds in the molecule is used.

Examples of such a monomer include hexanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, and neopentyl glycol di (meth) acrylate. , Pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, allyl (meth) acrylate, vinyl (meth) acrylate, divinylbenzene,
Other examples include epoxy (meth) acrylate, polyester (meth) acrylate, and urethane (meth) acrylate.

In the bulk polymerization of the photopolymerization method, a photopolymerization initiator is added to the acrylic monomer composition. Examples of the photopolymerization initiator include 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone [trade name “Darocur-
2959 "], α-hydroxy-α, α'-dimethylacetophenone [trade name" Darocur-11 "manufactured by Merck & Co., Ltd.
73 "], methoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone [manufactured by Ciba-Geigy,
Trade name "Irgacure 651"], 2-hydroxy-2
-Cyclohexyl acetophenone (manufactured by Ciba Geigy,
Such as acetophenone-based photopolymerization initiators such as trade name "Irgacure 184"], ketal-based photopolymerization initiators such as benzyldimethyl ketal, and other halogenated ketones, acylphosphinoxides, and acylphosphonates.

The method for polymerizing the acrylic copolymer is not particularly limited, and examples thereof include solution polymerization, bulk polymerization, emulsion polymerization, and suspension polymerization. In the bulk polymerization, a photopolymerization method using ultraviolet light is preferably used in that a uniform polymer is easily obtained.

As the acrylic pressure-sensitive adhesive, an acrylic copolymer obtained by polymerizing the above monomers in a solvent may be used as a solvent-type acrylic pressure-sensitive adhesive. It may be used as a system adhesive.

These acrylic copolymers may contain various additives such as tackifier resins, plasticizers, softeners, inorganic fillers, organic fillers and pigments, if necessary. .

Examples of the tackifying resin include rosin resins, modified rosin resins, terpene resins, terpene phenol resins, C5 and C9 petroleum resins, cumarone resins and hydrogenated products thereof. . These can be used alone or in combination of two or more.

The means for preparing the acrylic pressure-sensitive adhesive layer from the acrylic pressure-sensitive adhesive is not particularly limited. For example, a method of performing bulk polymerization of a coating film of an acrylic monomer composition by a photopolymerization method, a solvent method, and the like. A coating method in which an acrylic pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive or an emulsion-type pressure-sensitive adhesive is applied using a coater and dried.

The release paper temporarily attached to the pressure-sensitive adhesive layer is, for example, a kraft paper, a semi-bleached paper, a high-quality paper, a glassine paper or the like as a base material, and after a sealing material is laminated as necessary. A release paper having a thickness of about 70 to 150 μm coated with a silicone release agent at a basis weight of about 50 to 150 g / m ² is used.

If the tensile strength of the net-like reinforcing member laminated on one surface of the pressure-sensitive adhesive layer is less than 5 kg / 50 mm, the net-like reinforcing member cannot withstand expansion and contraction of the joint of the base material, and is stretched or cut to expand and contract. It is impossible to fulfill the role of reinforcement, that is, to maintain the shape of the finishing material by expanding and contracting the finishing material together with the acrylic pressure-sensitive adhesive layer that cushions the surface, and cracks and wrinkles may be added to the finishing material such as paint film or wallpaper, so the above range Is limited to

When the ratio of the net-like reinforcing member covering the pressure-sensitive adhesive layer surface is less than 10%, the mesh of the net-like reinforcing member becomes large. Partially tell the finishing material in the mesh,
If the cracks or wrinkles are added to the finishing material such as a coating film or wallpaper, and if it exceeds 80%, the mesh of the net-like reinforcing member becomes small, and the adhesive layer behind the mesh has a finishing material in the mesh. Is difficult to be restrained by bonding, so that a finishing material such as a coating film or wallpaper floats up or peels off, so that it is limited to the above range.

The net-like reinforcing member may be non-adhesive or slightly adhesive, and is not particularly limited as long as it satisfies the above-mentioned conditions of the tensile strength and the area covered with the pressure-sensitive adhesive layer. Although not a thing, for example, a woven fabric made of a drawn tape yarn such as polyethylene or polypropylene, a mesh made of fibers such as polyester yarn or vinylon yarn,
Examples include molded nets made of polyester resin, polyolefin resin such as polyethylene and polypropylene, perforated sheets such as polyethylene foam and polypropylene foam, and metal nets such as brass and stainless steel.

The thickness of the net-like reinforcing member is preferably smaller as long as it satisfies the above-mentioned conditions of the tensile strength and the area covered with the pressure-sensitive adhesive layer. It is 0.1 mm or less, more preferably 0.03 mm or less.

Among them, a weft orthogonally laminated nonwoven fabric in which stretched tape yarns are vertically laminated in the vertical direction and the horizontal direction and the intersection is fixed is preferably used. The above-mentioned weft-laminated nonwoven fabric is not particularly limited, but may be, for example, a polyethylene stretched tape yarn having a thickness of 20 to 100 μm.
m and a basis weight of about 5 to 50 g / m ² .
Further, the mesh width of the above-described weft orthogonally laminated nonwoven fabric is preferably 3 to 6 mm.

In the method for treating a base material according to the second aspect of the present invention, the decorative sheet used for makeup is not particularly limited, but examples thereof include a synthetic resin sheet such as a polyester resin sheet and paper. And a decorative sheet having a pressure-sensitive adhesive layer on the back surface as necessary. Further, the paint and the coating method used for painting are not particularly limited, and any paint and painting method used for construction can be used. The base material is not particularly limited, and examples thereof include concrete, mortar, wood wool cement board, and various wood boards.

The method for treating a seam of a base material according to claim 2 will be described below with reference to the drawings. 1 to 3
Is a drawing explaining the pretreatment of the construction of the finishing material,
FIG. 1 shows a case where a chamfer is formed in a V shape along a surface edge of an adjacent base material 1 such as concrete.
The grooves are filled with a caulking material 2 or the like, and the joints of the base material 1 are subjected to a pretreatment at the same level as the surface of the other base material 1,
The pressure-sensitive adhesive tape 3 according to claim 1, over the end surfaces of both base materials 1 including the pretreated seam portion 11,
Adhesive layer 32 on which net-like reinforcing member 31 is not laminated
After that, the decorative sheet is applied or finished with a finishing material 4 made of paint.

FIG. 2 shows that the base material 1 is provided with a prismatic notch at the surface side edge, and the adjacent end faces are loosely abutted to form a gap 11 therebetween. The gap 11 is formed like a dropping hole of a funnel. 2 shows a base on which shallow grooves are formed. When there are large gaps 11 at the joints from the beginning as described above, these gaps 11 are filled with the caulking material 2 and the like, and the adhesive tape 3 of the present invention is attached as in FIG. Alternatively, it is decorated with a finishing material 4 made of paint. In the embodiment shown in FIG. 2, since the paint 4 is used as a decorative finish, only the gap 11 between the adjacent end faces is coked. When a decorative sheet such as wallpaper is used as the finishing material 4 or when the stepped portion of the prismatic notch is large, as shown in FIG. 1, the joint of the base material 1 is at the same level as the surface of the other base material. And a finishing material is applied.

FIG. 3 shows a case in which the adjacent end faces of the base material 1 in FIG. 2 are closely butted against each other without any gap. If such a base is used, the base processing using a caulking material or the like is not required. After applying the pressure-sensitive adhesive tape 3 of the present invention over both base materials 1 including the seam 11 and one end surface, the finishing material 4 may be applied.

The pressure-sensitive adhesive tape according to the first aspect of the present invention is a
The elongation (at the time of cutting) specified by SZ0237 is 100
% Or more of the acrylic pressure-sensitive adhesive layer, JIS L 1
A net-like reinforcing member having a tensile strength of 5 kg / 50 mm or more specified by No. 096 is laminated, and 10 to 10
Since it is 80% covered, the acrylic pressure-sensitive adhesive layer expands and contracts following the expansion and contraction of the base material. However, the expansion and contraction is absorbed by the acrylic pressure-sensitive adhesive layer, and the net-like reinforcing member substantially absorbs the expansion and contraction. The finishing material made of a decorative sheet or a coating film, which does not extend, is a material in which the adhesive layer is locked to the net-like reinforcing member and is firmly fixed, so that cracks or wrinkles are caused by expansion and contraction of the base material. This makes it possible to maintain beautiful makeup for a long time without causing peeling or peeling off.

According to a second aspect of the present invention, there is provided a method for treating a joint of a base material, the method comprising: forming a decorative sheet or a coating on the base material; A very simple operation of attaching the pressure-sensitive adhesive sheet according to claim 1 to the surface on which the net-shaped reinforcing member is not laminated over the end portions of both base materials including the base material, and is composed of expansion and contraction of the base material and a decorative sheet or painting. It can be insulated from the finishing material, and can secure a strong bonding by anchoring the bonding surface of the decorative sheet or paint by the mesh of the net-like reinforcing member. There is no cracking or wrinkling in the film finishing material, and it can keep beautiful makeup for a long time without floating or peeling It is.

[0035]

Embodiments of the present invention will be described below.

Example 1 20 parts by weight of isomiristyl acrylate, 80 parts by weight of 2-ethylhexyl acrylate, 2 parts by weight of acrylic acid, 0.0 part of n-dodecanethiol
2 parts by weight, 2,2-dimethyl-2-phenylacetophenone (trade name "IRGACURE 65" manufactured by Ciba Geigy)
1)) An acrylic monomer composition comprising 0.1 part by weight and hexanediol diacrylate 0.05 part by weight is uniformly mixed, and a release treatment of a 38 μm-thick polyester film (PET film) which is release-treated. The surface is coated so that the thickness at the end of polymerization is 1 ± 0.1 mm, and the release treated surface of a 38 μm-thick PET film that has been release-treated in the same manner as described above is in contact with the coated surface. Covered coated surface.

Next, the acrylic monomer composition was irradiated with ultraviolet light at an irradiation intensity of ² mW / cm ² for 10 minutes from above the PET film using a chemical lamp and polymerized to produce an acrylic pressure-sensitive adhesive sheet. . The elongation (at the time of cutting) of the acrylic pressure-sensitive adhesive sheet measured according to JIS Z 0237 was 1000%.

One of the above acrylic pressure-sensitive adhesive sheets, PE
The T film was peeled off to expose the pressure-sensitive adhesive layer, and a net-like reinforcing member (trade name “Sof HN3” manufactured by Sekisui Chemical Co., Ltd.)
3 ", a thickness of 30 μm, and a tensile strength of 10 kg / 50 mm measured according to JIS L 1096) were laminated to produce an adhesive sheet. The fraction of the area of the pressure-sensitive adhesive layer covered by the net-like reinforcing member was 27%.

Example 2 Instead of the net-like reinforcing member of Example 1, a net-like reinforcing member (trade name “Sof HN55”, manufactured by Sekisui Chemical Co., Ltd., thickness 70 μm, JIS L109)
(Tensile strength measured according to No. 6 35 kg / 50 mm)
A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the adhesive sheet was used. The fraction of the area of the pressure-sensitive adhesive layer covered by the net-like reinforcing member was 67%.

Example 3 Instead of the acrylic monomer composition of Example 1, 30 parts by weight of lauryl acrylate was used.
70 parts by weight of butyl acrylate, 4 parts by weight of acrylic acid,
2,2-dimethyl-2-phenylacetophenone (trade name “IRGACURE 651”, manufactured by Ciba Geigy) 0.1
A pressure-sensitive adhesive sheet was prepared in the same manner as in Example 1, except that an acrylic monomer composition comprising parts by weight and 0.05 parts by weight of hexanediol diacrylate was used. JIS Z 0237 of the obtained acrylic pressure-sensitive adhesive sheet
The elongation (at the time of cutting) measured in accordance with was 400%.

(Comparative Example 1) Instead of the net-like reinforcing member of Example 1, a net-like reinforcing member (trade name “Glass Soft” manufactured by Sekisui Chemical Co., Ltd., thickness: 200 μm, tensile strength measured according to JIS L 1096) A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the strength was 50 kg / 50 mm). The fraction of the area of the pressure-sensitive adhesive layer covered by the net-like reinforcing member was 7%.

(Comparative Example 2) A net-like reinforcing member (manufactured by Nisseki Plast Co., Ltd., trade name “EX-24”, a thickness of 130 μm, JIS L109) was used instead of the net-like reinforcing member of Example 1.
(Tensile strength measured according to No. 6 30 kg / 50 mm)
A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the adhesive sheet was used. The fraction of the area of the pressure-sensitive adhesive layer covered by the net-like reinforcing member was 81%.

Comparative Example 3 Instead of the acrylic monomer composition of Example 1, 2-ethylhexyl acrylate 8
0 parts by weight, 20 parts by weight of acrylic acid, 0.01 parts by weight of n-dodecanethiol, 0.1 part by weight of 2,2-dimethyl-2-phenylacetophenone (trade name “Irgacure 651”, manufactured by Ciba Geigy) and hexanediol A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1, except that an acrylic monomer composition comprising 0.05 parts by weight of diacrylate was used. J of the obtained acrylic pressure-sensitive adhesive sheet
The elongation (at the time of cutting) measured according to IS Z 0237 was 80%.

In order to evaluate the performance of the pressure-sensitive adhesive tapes obtained in Examples 1 to 3 and Comparative Examples 1 to 3, the following method was used.
The elongation of the coating film and the state of cracking of the coating film with time were examined. The test results are shown in Table 1.

1. Elongation of coating film: Ceramic siding material (manufactured by Ask Corporation, trade name "Flat SG", size: 12
mm x 150 mm x 150 mm) to form a continuous plane, and the resulting joint has a width of 50 m over the ends of the left and right base materials including the joint.
m, and then a seam treatment is performed on the base material by applying an adhesive tape having a thickness of 500 μm using a paint (trade name “V-Seran” manufactured by Dainippon Paint Co., Ltd.). Paint with a brushing method so that
A tensile force was applied to the coating at a speed of mm / min, and the distance at which the coating first cracked was measured.

2. Crack: Ceramic siding material (manufactured by Ask Corporation, trade name "Flat SG", size: 12 mm
× 465 mm × 3030 mm) at the end face of its long side to form a continuous outer wall surface, and the thickness of the coating film was 500 μm using a paint (trade name “V-Seran” manufactured by Dainippon Paint Co., Ltd.). The coating was applied by a brush coating method so that the condition of damage such as cracks after one year was visually inspected.

[0047]

[Table 1]

[0048]

Since the pressure-sensitive adhesive sheet according to the first aspect of the present invention is constituted as described above, it does not crack or wrinkle due to expansion and contraction of the base material.
It can keep beautiful makeup for a long time without lifting or peeling.

Further, since the method for seaming a base material according to the second aspect of the present invention is configured as described above, the end portions of both base materials including the seam portion of the pressure-sensitive adhesive sheet according to the first aspect of the present invention. It is possible to insulate the expansion and contraction of the base material and the decorative sheet or the finishing material made of paint, and to attach the decorative sheet or paint to the surface to secure strong adhesion. Since the mesh of the net-like reinforcing member that can be realized is formed, cracks and wrinkles do not occur in the decorative material or the finishing material made of the coating film due to expansion and contraction of the base material, and floating is not caused. It can keep beautiful makeup for a long time without causing peeling.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of an embodiment of a method for processing a joint of a base material using an adhesive tape of the present invention.

FIG. 2 is a cross-sectional view showing another example of the implementation of the method for treating a joint of a base material using the pressure-sensitive adhesive tape of the present invention.

FIG. 3 is a cross-sectional view showing another example of the implementation of the method for treating a joint of a base material using the adhesive tape of the present invention.

FIG. 4 is a cross-sectional view showing an example of an embodiment of a conventional base material joint processing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 11 Seam 2 Caulking material 3 Acrylic adhesive sheet 31 Net reinforcement member 32 Adhesive layer 4 Finishing material 5 Crack

Claims (2)

[Claims] 1. An acrylic pressure-sensitive adhesive layer having an elongation (at the time of cutting) defined by JIS Z 0237 of 100% or more has a tensile strength specified by JIS L 1096 of 5 k.
A pressure-sensitive adhesive sheet, wherein a net-like reinforcing member of g / 50 mm or more is laminated, and 10 to 80% of the pressure-sensitive adhesive layer surface is covered. 2. The method according to claim 1, wherein, when a decorative sheet or a decorative material is applied on the base material, both ends of the base material including the seam portion of the base material joined by abutting end surfaces thereof are joined to each other. The method according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive sheet is attached on a surface on which the net-like reinforcing member is not laminated.