JP2024002344A - Laminated member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated member capable of suppressing shape change due to water infiltration.

SOLUTION: Laminated members 10, 110, 210 comprise upper layer members 20, 120 and waterproofing members 30, 230 provided on the underside of the upper layer members 20, 120.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

Patent Law Article 30, Paragraph 2 application filed Date of sale: March 28, 2020 Place of sale: Ansui Construction Co., Ltd.

The present invention relates to a laminated member.

As a laminated member, Patent Document 1 discloses a water-permeable cushioning material layer that is made of at least a crushed vulcanized rubber sponge and a crushed vulcanized rubber sponge and that is formed by adhering the crushed pieces to each other. (cloth, cheesecloth, etc.); a water-permeable sheet layer adhered to the lower surface of the cushioning material layer; and a water-permeable artificial turf layer adhered to the upper surface of the cushioning material layer. is disclosed.

Japanese Patent Application Publication No. 5-247904

In the laminated member disclosed in Patent Document 1 mentioned above, water infiltrates into the water-permeable cushioning material layer through the water-permeable sheet layer and the water-permeable artificial grass layer, and this infiltration changes the shape of the water-permeable cushioning material layer. As a result, there was a risk that the shape of the laminated member would change.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a laminated member that can suppress shape changes due to water infiltration.

In order to solve the above problems, a laminated member according to the present invention is characterized by comprising an upper layer member and a waterproof member provided on the lower surface of the upper layer member.

According to the laminated member according to the present invention, since the waterproof member is provided on the lower surface of the upper layer member, infiltration (infiltration) of water from the lower surface side of the upper layer member can be suppressed. Therefore, changes in the shape of the upper layer member due to infiltration of water can be suppressed, and in turn, changes in the shape of the laminated member can be suppressed.

Moreover, in the laminated member according to the present invention, it is preferable that the upper layer member includes a base member and a surface member provided on the upper surface side of the base member. According to this, it becomes possible to protect the upper surface side of the foundation member, where water infiltration from the lower surface side is suppressed by the waterproof member, by the surface member.

Further, in the laminated member according to the present invention, the upper layer member is provided between the base member and the surface member and serves as an adhesion aid for assisting the adhesion of the base member to the lower surface side of the surface member. Preferably, the device further includes a member. According to this, since the adhesion auxiliary member can assist in adhesion between the base member and the surface member, it is possible to appropriately adhere the base member and the surface member with a desired adhesive strength. .

Moreover, in the laminated member according to the present invention, it is preferable that the base member includes a pulverized material. According to this, it is possible to provide a waterproof member on the lower surface of the base member that has the crushed material, so it is possible to suppress water infiltration from the lower surface of the upper layer member that has the crushed material that is relatively likely to expand due to infiltration. can do. Therefore, changes in the shape of the upper layer member due to infiltration of water can be suppressed, and in turn, changes in the shape of the laminated member can be suppressed.

Moreover, in the laminated member according to the present invention, it is preferable that the surface member is artificial grass. According to this, when artificial turf is used as the surface material, even if the foundation material expands, the surface material layer can absorb the deformation, making it possible to suppress changes in the shape of the entire laminated material. .

Moreover, in the laminated member according to the present invention, it is preferable that the adhesion auxiliary member has waterproof properties. According to this, it is possible to provide the adhesion auxiliary member having waterproof properties on the upper surface of the base member, so that it is possible to suppress water infiltration from the upper surface side of the base member. Therefore, it is possible to suppress changes in the shape of the base member and ultimately the upper layer member due to water infiltration.

According to this invention, it is possible to provide a laminated member that can suppress shape change due to water infiltration.

1 is a sectional view showing an embodiment of a laminated member 10 according to the present invention. 1 is a cross-sectional view showing one embodiment of a method for manufacturing a laminated member 10 according to the present invention. 1 is a cross-sectional view showing one embodiment of a method for manufacturing a laminated member 10 according to the present invention. It is a sectional view showing a laminated member 110 according to a first modification. It is a sectional view showing a laminated member 210 according to a second modification.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the laminated member 10 and its manufacturing method by this invention is described with reference to drawings. However, the present invention is not limited to this embodiment, and can be implemented in various forms with various changes and improvements based on the knowledge of those skilled in the art.

(Laminated member)
As shown in FIG. 1, the laminated member 10 includes an upper layer member 20 and a waterproof member 30 provided on the lower surface of the upper layer member 20. The upper layer member 20 includes a surface member 21, a base member 22, and an adhesion auxiliary member 23. In the upper layer member 20, the surface member 21, the adhesion auxiliary member 23, and the base member 22 are laminated in this order. The surface member 21 is bonded to the adhesion auxiliary member 23 via the first adhesive layer 24 , and the base member 22 is bonded to the adhesion auxiliary member 23 via the second adhesive layer 25 . The waterproof member 30 is bonded to the base member 22 via the third adhesive layer 26.

The surface member 21 is artificial turf formed into a plate shape. The surface member 21 includes a grass portion 21a, a sheet portion 21b, and a protruding portion 21c. The grass portion 21a has a large number of lanceolate linear members. The lanceolate linear member is a flat, elongated member with a pointed end and a slightly wider base, and is made of polyethylene, polypropylene, etc., for example.

The sheet portion 21b is a sheet-like (or plate-like) member on which the grass portion 21a is planted, and is made of polypropylene, for example. The base of the lanceolate linear material of the grass section 21a is planted in the seat section 21b. For example, the base of the lanceolate linear material is sewn to the sheet portion 21b. The sewn portion protrudes from the back surface (lower surface) of the sheet portion 21b and forms a protruding strip portion 21c. In this way, the protruding portion 21c is provided on the back surface of the surface member 21, that is, the back surface of the sheet portion 21b. It is preferable that the protruding portion 21c is formed of the same material as the seat portion 21b or the same material as the grass portion 21a. It is preferable that the protruding portion 21c is a linear convex portion. Note that the protruding portion 21c may be formed by providing a plurality of protrusions intermittently on a straight line.

Incidentally, the protruding portion 21c protrudes from the back surface of the sheet portion 21b in order to plant the grass portion 21a. For example, the base of the grass portion 21a may pass through the seat portion 21b, and a protruding portion 21c may be formed to fix the protruding portion. Note that the protruding portion may form the protruding strip 21c as it is, or the protruding strip 21c may be formed to cover the protruding portion.

Further, the back surface of the surface member 21 is preferably coated with, for example, a rubber member. Examples of the rubber member include natural rubber and synthetic rubber. Examples of synthetic rubber include isoprene rubber, butadiene rubber, styrene-butadiene rubber, acrylic rubber, urethane rubber, and silicone rubber.

Note that the surface member 21 is not limited to artificial turf, and other members such as an outdoor flooring material or an indoor flooring material having a function of absorbing impact may be used. The surface member 21 may be formed not in a plate shape but in a sheet shape.

The base member 22 is a member to which the surface member 21 is adhered. The base member 22 is a member that is bonded to the surface member 21 to maintain the strength of the surface member 21 at a high level. The base member 22 is formed into a plate or sheet shape.

The base member 22 is made of natural rubber, ethylene propylene diene rubber (EPDM), styrene butadiene rubber (SBR), nitrile rubber (NBR), butadiene rubber (BR), butyl rubber (isoptylene/isoprene rubber) (IIR), or silicone rubber. It is preferably made of synthetic rubber such as fluororubber. The base member 22 is made of foamed rubber obtained by foaming a rubber material, rubber pellets obtained by crushing rubber material or foamed rubber and forming them into particles in a predetermined shape such as a sphere or cylinder, and hardening them, or pellets obtained by aggregating these pellets. Preferably, it is formed by agglomerates. Thus, the base member 22 preferably comprises pulverized material. Further, the base member 22 may be formed of a single piece.

Note that the base member 22 may be provided with cheesecloth. For example, cheesecloth is preferably laminated on the lower surface of the base member 22. According to this, when water enters the base member 22 and causes it to swell, it is possible to suppress the swelling due to water intrusion and to suppress deformation (warpage) of the base member 22.

The adhesion assisting member 23 is a member for assisting the adhesion between the surface member 21 and the base member 22. That is, it can also be said that the adhesion assisting member 23 is a member provided on the back surface (lower surface) of the surface member 21 to assist in adhering the base member 22 to the lower surface side of the surface member 21. In this case, the base member 22 is the member to be bonded to the surface member 21. Further, the adhesion assisting member 23 can also be said to be a member provided on the surface (upper surface) of the base member 22 to assist in adhering the surface member 21 to the surface side of the base member 22. In this case, the surface member 21 is the member to be bonded to the base member 22.

The adhesion auxiliary member 23 is formed into a plate shape. It is preferable that the thickness of the adhesion auxiliary member 23 is set to a value greater than the height of the protruding strip portion 21c. In this embodiment, since the height of the protruding strip 21c is approximately 3 mm, the thickness of the adhesion auxiliary member 23 is preferably set to a value greater than 5 mm. The adhesion auxiliary member 23 is made of a soft material whose hardness is less than a predetermined value. The hardness is preferably, for example, 80 (Shore A) or less, and more preferably 60 (Shore A) or less. Examples of the soft material include polyurethane, polystyrene, polyethylene (PE, including foamed material), polypropylene (PP, including foamed material), nonwoven fabric, ethylene vinyl acetate (EVA), thermoplastic elastomer, and the like. Examples of the thermoplastic elastomer include thermoplastic olefin elastomer (TPO), thermoplastic polyurethane elastomer (TPU), thermoplastic styrene elastomer (TPS), and soft polyvinyl chloride (PVC).

Note that the adhesion auxiliary member 23 is preferably waterproof. According to this, since the adhesion auxiliary member 23 provided on the upper surface of the base member 22 has waterproof properties, it is possible to suppress water infiltration (infiltration) from above the base member 22. Therefore, it becomes possible to suppress changes in the shape of the base member 22 and eventually the upper layer member 20 due to infiltration of water, and furthermore, it becomes possible to suppress changes in the shape of the laminated member 10.

Note that examples of the nonwoven fabric include short fiber nonwoven fabric and long fiber nonwoven fabric. Examples of short fiber nonwoven fabrics include spunlace nonwoven fabric, which is produced by intertwining the fibers (especially short fibers) in a web with a high-pressure water stream without using a binder (adhesive), and needle punch, which intertwines the fibers by reciprocating needles. Examples include nonwoven fabrics and thermal bond nonwoven fabrics using heat-welded fibers. Examples of long fiber nonwoven fabrics include spunbond nonwoven fabrics, melt blown nonwoven fabrics, flash spun nonwoven fabrics, and the like. Spunbond nonwoven fabrics are nonwoven fabrics made by melting or dissolving polymers and laminating continuous fibers (filaments) spun from a nozzle onto a moving screen using one or more bonding methods. Meltblown nonwoven fabrics are nonwoven fabrics made by spinning polymers into fibers in a high velocity hot gas stream, collecting them on a moving screen after cooling, and using one or more bonding methods. Flash-spun nonwovens are made by spinning a polymer solution through a nozzle under constant conditions, evaporating the solvent immediately after spinning, and layering these fibers on a moving screen to create a highly woven fabric made by one or more bonding methods. It is a nonwoven fabric made of fibrillated filaments. The above-mentioned polymer is a high-molecular organic compound, and is a thermoplastic resin (synthetic resin) such as polyamide, polyethylene, polypropylene, polyurethane, etc.

Moreover, it is preferable that the strain of the adhesion auxiliary member 23 is set to a larger value than the strain of the base member 22. The adhesion auxiliary member 23 is a member whose strain is within a predetermined range. The predetermined range is preferably 25 to 75%, more preferably 40 to 60%. Note that the strain is the ratio of the amount of deformation ΔL to the original (before deformation) length L (strain=ΔL/L).

The first adhesive layer 24 is a layer formed of a first adhesive. Preferably, the first adhesive is an adhesive that does not contain an organic solvent. For example, the first adhesive may be a hot melt adhesive. A hot-melt adhesive is an adhesive that is melted and bonded by applying heat, and the material used is a thermoplastic synthetic resin such as ethylene vinyl acetate (EVA). In this embodiment, a moisture-curable hot melt adhesive is used as the hot melt adhesive. Note that the second adhesive layer 25 is a layer formed similarly to the first adhesive layer 24, and is formed of a second adhesive similar to the first adhesive. Further, the third adhesive layer 26 is a layer formed similarly to the first adhesive layer 24, and is formed of the same third adhesive as the first adhesive.

The moisture-curing hot-melt adhesive is a urethane-based moisture-curing hot-melt adhesive, and has a urethane prepolymer as its main component. Moisture-curable hot melt adhesives are obtained by the reaction of polyester polyols and isocyanate compounds, and have isocyanate groups (NCO) at the ends. Particularly preferred is one having a terminal NCO% of 1 to 3%. In addition, polyester polyols include, for example, polycondensation of aliphatic carboxylic acids such as malonic acid, succinic acid, and adipic acid, aromatic carboxylic acids such as phthalic acid, and aliphatic glycols such as ethylene glycol, diethylene glycol, and propylene glycol. Examples include polyester polyols obtained by The polyester polyol is preferably one made of a dicarboxylic acid having 6 or more carbon atoms (adipic acid, sebacic acid, etc.), and furthermore, one containing 80% by weight or more of a crystalline ester polyol with a melting point of 45° C. or more as a polyol component is used. is more preferable. Note that alcohols having 4 or more carbon atoms (1,4-butanediol, 1,6-hexanediol, etc.) can be used as the glycol constituting the polyester polyol. Further, as the isocyanate compound, aromatic isocyanates are preferable, and diphenylmethane diisocyanate (MDI) is particularly preferable. Furthermore, the moisture-curable hot melt adhesive may contain additives such as a tackifier, wax, crystal nucleating agent, and antioxidant, if necessary. Further, the moisture-curing hot-melt adhesive is not limited to a urethane-based moisture-curing hot-melt adhesive, and a polyester-based or acrylic-based moisture-curing hot-melt adhesive may be used.

When bonding the surface member 21 and the adhesion auxiliary member 23, the moisture-curable hot melt adhesive is applied to the back surface (to be applied) of the surface member 21 by roll coating using a roll coater. applied. Note that the moisture-curing hot melt adhesive may be applied not only to the back surface of the surface member 21 but also only to the surface (to be applied) of the adhesion auxiliary member 23, and may be applied to the back surface of the surface member 21 and the adhesion auxiliary member 23. It may be applied to both surfaces. Moreover, when bonding the adhesion auxiliary member 23 and the base member 22, the moisture-curable hot melt adhesive may be applied to the back surface of the adhesion auxiliary member 23 and/or the surface of the base member 22. Furthermore, when bonding the base member 22 and the waterproof member 30, the moisture-curable hot melt adhesive may be applied to the back surface of the base member 22 and/or the surface of the waterproof member 30.

Examples of the roll coater used in roll coating include the roll coater described in JP 2018-184000A. This roll coater includes a feed roll, a supply roll, an applicator roll, and a hot melt adhesive storage tank. The molten moisture-curing hot melt adhesive stored in the hot melt adhesive storage tank is supplied between the supply roll and the application roll from the discharge section while the application target is being sent in one direction by the feed roll. be done. The molten moisture-curable hot melt adhesive supplied between the supply roll and the application roll is supplied to the upper surface (coating surface) of the object to be coated by rotation of the supply roll and the application roll. The molten moisture-curable hot-melt adhesive supplied to the upper surface of the object to be applied comes into contact with the lower end of the outer peripheral surface of the rotating application roll and is applied to the upper surface of the object to be applied.

In order to enable easy and good roll coating, moisture-curing hot melt adhesives are solid at room temperature, molten at 100°C or higher, and have a melt viscosity of 140°C (JIS K 6862). is preferably 5 to 15 Pa·s (Pascal seconds). Note that "solid at room temperature" means that it is solid at 20°C. Further, the temperature range of the molten state can be appropriately set in the range of 100 to 160°C. Furthermore, the moisture-curable hot melt adhesive is preferably a urethane prepolymer containing a crystalline ester polyol, and even if seasonal changes are taken into account, the crystalline polyester polyol is (1) solid at room temperature and has a melting point of 45°C or higher. (2) It is preferable that the solidification time at room temperature after melt coating is 1 to 5 minutes. In other words, in order for a moisture-curing hot-melt adhesive to quickly dry and harden at room temperature within a predetermined equipment length by applying it to a long sheet while being rolled back, it is necessary to The NCO content is preferably 1 to 3% and the number average molecular weight is preferably 1000 to 4000, more preferably 1500 to 2500.

Further, the coating amount of the moisture-curing hot melt adhesive is preferably 30 to 200 g/m ² , more preferably 50 to 150 g/m ² . Note that the coating method is not limited to roll coating, and spray coating may also be used.

Particularly preferred as spray coating is a curtain spray method in which a moisture-curable hot melt adhesive is discharged from a plurality of nozzles arranged in a row under heating and pressure, and is sprayed while being spun into threads to be laminated. According to the curtain spray method, filamentous molten resin is spun and stretched using high-temperature, high-speed airflow, and is directly sprayed onto the skin material to laminate the resin.

In spray application, hot melt adhesives are applied by well-known spray application equipment. As a spray coating device, one disclosed in Japanese Unexamined Patent Publication No. 2017-136735 is known. The spray coating device applies a molten moisture-curing hot-melt adhesive supplied from a moisture-curing hot-melt adhesive storage tank to an adhesive-coated surface to which the adhesive is to be coated.

The waterproof member 30 is formed of a waterproof material in a plate or sheet shape. The thickness of the waterproof member 30 is preferably set to 3 mm to 7 mm, although it depends on the material. In this embodiment, the thickness of the waterproof member 30 is set to 5 mm. The waterproof material is a material that has waterproof properties, and examples of waterproof materials include polyurethane, polystyrene, polyethylene (PE, including foaming), polypropylene (PP, including foaming), nonwoven fabric, ethylene vinyl acetate (EVA), Examples include thermoplastic elastomer. Examples of the thermoplastic elastomer include thermoplastic olefin elastomer (TPO), thermoplastic polyurethane elastomer (TPU), thermoplastic styrene elastomer (TPS), and soft polyvinyl chloride (PVC).

The waterproof member 30 prevents water from entering the base member 22 from the bottom side, so it prevents changes in the shape of the base member 22 (for example, warping at the four corners, warping at the center, protrusion, waving, depressions, etc.). Therefore, it becomes possible to suppress the change in shape of the laminated member 10.

(Manufacturing method for laminated members (manufacturing process))
Next, a manufacturing method (manufacturing process) of the above-described laminated member 10 will be described with reference to FIGS. 2A and 2B. The method for manufacturing the laminated member 10 includes a first application step S1, a first pressure bonding step S3, a second application step S5, a second pressure bonding step S7, a third application step S9, a third pressure bonding step S11, and a curing step S13. ing.

(First coating process/first pressure bonding process)
In the first application step S1, the hot melt adhesive 25a is applied to at least one of the front surface (upper surface) of the base member 22 and the back surface (lower surface) of the adhesion auxiliary member 23. In this case, hot melt adhesive 25a is preferably applied by roll coating (as described above). In this embodiment, the hot melt adhesive 25a is applied to both the front surface of the base member 22 and the back surface of the adhesion auxiliary member 23. In the roll coating, the hot melt adhesive 25a is applied by a well-known roll coating device (roll coater). The coating amount is preferably 30 to 200 g/m ² , more preferably 50 to 150 g/m ² . Furthermore, the coating method may be spray coating instead of roll coating.

In the first crimping step S3, the base member 22 and the adhesion auxiliary member 23 are crimped together after the first application step S1. In the first crimping step S3, first, the base member 22 and the adhesion auxiliary member 23 are overlapped with the surfaces coated with the adhesive 25a (adhesive coated surfaces) (if the adhesive is coated only on one side, , align the front surface of the base member 22 and the back surface of the adhesion auxiliary member 23). Thereafter, the laminated base member 22 and adhesion auxiliary member 23 are compressed by a predetermined compression amount using a press device. As a result, the first stage foundation member 41, which is the foundation member 22 to which the adhesion auxiliary member 23 is adhered, is formed.

Note that the predetermined compression amount is preferably an amount such that the ratio to the thickness of the object to be compressed is 40 to 60%, and in this embodiment, the ratio is set to 50%. Further, the compression is performed for a predetermined period of time (for example, 40 seconds). Note that the predetermined time is preferably set to 40 to 80 seconds.

(Second application process/second pressure bonding process)
In the second application step S5, the hot melt adhesive 26a is applied to at least one of the front surface of the waterproof member 30 and the back surface of the base member 22. In this case, hot melt adhesive 26a is preferably applied by roll coating (described above). In this embodiment, the hot melt adhesive 26a is applied to both the front surface of the base member 22 and the back surface of the waterproof member 30. The coating amount is preferably 30 to 200 g/m ² , more preferably 50 to 150 g/m ² . Furthermore, the coating method may be spray coating instead of roll coating.

In the second crimping process S7, the first stage foundation member 41 and the waterproof member 30 are crimped together after the second coating process S5. In the second crimping step S7, first, the first stage foundation member 41 and the waterproof member 30 are stacked together with the surfaces coated with the adhesive 26a (adhesive coated surfaces) (in the case where the adhesive is coated only on one side). (In order to match the front surface of the waterproof member 30 and the back surface of the foundation member 22.) Thereafter, the laminated first stage foundation member 41 and waterproof member 30 are compressed by a predetermined compression amount using a press device. Thereby, the waterproof member 30 is adhered to the lower surface of the first stage foundation member 41 (foundation member 22), and the second stage foundation member 42 is formed. In the second stage foundation member 42, the adhesion auxiliary member 23 is adhered to the upper surface of the foundation member 22, and the waterproof member 30 is adhered to the lower surface of the foundation member 22. Note that the predetermined compression amount and compression time are preferably set in the same manner as in the first crimping step S3 described above.

Incidentally, after the second pressure bonding step S7, it is preferable to harden the adhesives 25a and 26a of the second stage base member 42 laminated in the second pressure bonding step S7. In this curing step, for example, the second stage base member 42 after the second pressure bonding step S7 is stored at a predetermined temperature and a predetermined humidity for a predetermined period of time, so that the hot melt adhesive is naturally cooled and allowed to cool in the air. It reacts with moisture (humidification) and hardens. The curing time required for the hot melt adhesive to completely harden due to moisture curing is, for example, several hours to more than ten hours. Further, it is preferable that the predetermined time is set to 24 to 72 hours (hours), and in this embodiment, it is set to 24 hours. Preferably, the predetermined temperature is set to 5 to 40°C, and in this embodiment, it is set to 15 to 30°C (so-called room temperature). The predetermined humidity is preferably set to a relative humidity of 40 to 95%, and in this embodiment is set to 45 to 85% (so-called normal humidity).

(Third coating process/third crimping process)
In the third application step S9, the hot melt adhesive 24a is applied to at least one of the front surface of the adhesion auxiliary member 23 (second stage base member 42) and the back surface of the surface member 21. In this case, hot melt adhesive 24a is preferably applied by roll coating (as described above). In this embodiment, the hot melt adhesive 24a is applied to both the front surface of the adhesion auxiliary member 23 and the back surface of the surface member 21. The coating amount is preferably 30 to 200 g/m ² , more preferably 50 to 150 g/m ² . The amount of application is preferably set to an amount that can exhibit the desired adhesive strength and that does not fill the gaps between the protrusions 21c, that is, the recesses of the surface member 21, with the adhesive. Furthermore, the coating method may be spray coating instead of roll coating.

In the third pressure bonding step S11, the second stage base member 42 and the surface member 21 are bonded together after the third application step S9. In the third crimping step S11, first, the second stage foundation member 42 and the surface member 21 are stacked with their surfaces coated with the adhesive 24a (adhesive coated surfaces) aligned (in the case where the adhesive is coated only on one side). (In this case, the front surface of the adhesion auxiliary member 23 and the back surface of the front surface member 21 are aligned.) Thereafter, the laminated second stage foundation member 42 and surface member 21 are compressed by a predetermined compression amount using a press device. Thereby, the surface member 21 is adhered to the second stage base member 42, and the laminated member 10 is formed. Note that the predetermined compression amount and compression time are preferably set in the same manner as in the first crimping step S3 described above.

In the curing step S13, the adhesive 24a of the laminated member 10 laminated in the third compression bonding step S11 is cured, and the laminated member 10 is completed. In the curing step S13, the laminated member 10 after the third compression bonding step S11 is stored at a predetermined temperature and a predetermined humidity for a predetermined period of time, so that the hot melt adhesive naturally cools and absorbs moisture (humidification) in the air. Reacts and hardening progresses. Note that in the curing step S13, a curing step is performed in the same manner as the curing step performed after the second compression bonding step S7 described above.

EXAMPLES The present invention will be explained in more detail with reference to Examples below. However, the present invention is not limited to this embodiment, and can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art.

Using the surface member 21, base member 22, adhesion auxiliary member 23 (waterproof), waterproof member 30, and adhesive shown in Table 1, the laminated member 10 of Comparative Example 1 and the laminated member 10 of Examples 1 and 2 were prepared. Created.

The laminated member of Comparative Example 1 includes a surface member 21, a base member 22, and an adhesion auxiliary member 23, but does not include a waterproof member 30. The surface member 21 is artificial turf, and the base member 22 is foamed rubber pellets (thickness is 15 mm). The adhesion auxiliary member 23 is made of foamed polyethylene and has a thickness of 5 mm. The surface member 21 and the adhesion auxiliary member 23 and the adhesion auxiliary member 23 and the base member 22 are bonded together using a urethane-based hot melt adhesive. The urethane hot melt adhesive is applied by the method described above.

The laminated member 10 of Example 1 includes not only a surface member 21, a base member 22, and an adhesion auxiliary member 23, but also a waterproof member 30, unlike Comparative Example 1. The surface member 21 is artificial turf, and the base member 22 is foamed rubber pellets (thickness is 15 mm). The adhesion auxiliary member 23 is made of foamed polyethylene and has a thickness of 5 mm. The waterproof member 30 is made of foamed polyethylene and has a thickness of 5 mm. The surface member 21 and the adhesion auxiliary member 23 and the adhesion auxiliary member 23 and the base member 22 are bonded together using a urethane-based hot melt adhesive that does not contain an organic solvent. The base member 22 and the waterproof member 30 are bonded together using a urethane-based hot melt adhesive that does not contain an organic solvent.

The laminated member of Example 2 includes a surface member 21, a base member 22, and a waterproof member 30, and unlike Example 1, does not include an adhesion auxiliary member 23. The surface member 21 is artificial turf, and the base member 22 is foamed rubber pellets (thickness is 15 mm). The waterproof member 30 is made of foamed polyethylene and has a thickness of 5 mm. The surface member 21 and the base member 22 are bonded together using a chloroprene rubber solvent-based adhesive. The base member 22 and the waterproof member 30 are bonded together using a urethane-based hot melt adhesive that does not contain an organic solvent.

The laminated members 10 of each Example and each Comparative Example were evaluated for deformability due to infiltration. Specifically, the laminated member 10 of Example 2 and the laminated members (predetermined dimensions (e.g., 50 cm x 50 cm)) of Comparative Examples 1 and 2 are heated at a predetermined temperature (e.g., 90° C.) and a predetermined humidity (e.g., 95%). ) in a constant humidity and temperature chamber, and then check for changes in shape (especially the amount of warpage) of the laminated member 10 (check for changes over time).

In Comparative Example 1, all three test samples had four-sided warpage. Each amount of warpage was 5 to 17 mm, and the average amount of warp per sample was 9.8 mm. In Comparative Example 1, the adhesion auxiliary member 23 having waterproof properties is laminated on the upper surface of the foundation member 22, and although it is possible to suppress water from entering from the upper surface of the foundation member 22, it is possible to prevent water from entering from the lower surface of the foundation member 22. Therefore, the foundation member 22 is infiltrated from the bottom side. At this time, although the adhesion auxiliary member 23 and the surface member 21 are laminated on the upper surface of the base member 22, nothing is laminated on the lower surface of the base member 22, so the base member 22 that has been infiltrated and expanded is The lower surface side is expanded more than the upper surface side, and the upper side of the base member 22 is deformed so as to be warped.

On the other hand, in Example 1, although four-sided warpage occurred in almost all three test samples, the amount of each warp was 1 to 4 mm, and the average amount of warp per sample was 2.9 mm. In the first embodiment, a waterproof adhesion auxiliary member 23 is laminated on the upper surface of the base member 22, and a waterproof member 30 is laminated on the lower surface of the base member 22, so that the upper and lower surfaces of the base member 22 are laminated. It becomes possible to suppress water intrusion from both sides. As a result, the expansion of the foundation member 22 due to water intrusion (infiltration) can be suppressed as a whole (and the expansion of the lower surface side can be suppressed more than the upper surface side), and the upper side of the foundation member 22 is warped. deformation can be suppressed.

Furthermore, in Example 2, almost all of the three test samples did not suffer from warping at the four corners, but warping (convex portion) did occur at the center of the sample. Each amount of warpage was about half that of Comparative Example 1, and the average amount of warpage per sample was about 5 mm. In Example 2, the waterproof member 30 is laminated on the lower surface of the foundation member 22, and although it is possible to suppress water intrusion from the lower surface of the foundation member 22, it is possible to suppress water intrusion from the upper surface of the foundation member 22. Since this is not possible, the foundation member 22 is infiltrated from the top side. At this time, since the waterproof member 30 is laminated on the lower surface of the foundation member 22 and the surface member 21 is laminated on the upper surface, the foundation member 22 that has been infiltrated and expanded is expanded more on the upper surface side than the lower surface side. , the base member 22 is deformed so that its lower side is warped (that is, its central portion becomes convex).

As is clear from the above description, in the laminated member of Comparative Example 1, the four corners of the sample are relatively largely warped due to infiltration, so it cannot be said that the deformability is good from the viewpoint of appearance and usability. On the other hand, in the laminated member of Example 1, although the four corners of the sample were warped due to infiltration, the amount of warpage was reduced to a small extent, so it can be said that the deformability was good from the viewpoint of appearance and usability. In addition, in the laminated member of Example 2, although the central part of the sample warps due to infiltration, it is possible to suppress the warping of the four corners, so the deformability is considered to be good from the viewpoint of appearance and usability. I can say it.

(First modification)
In the embodiment described above, the protruding stripes 21c are formed on the back surface of the surface member 21, and the surface of the adhesion auxiliary member 23 is made flat. At the same time, the back surface of the surface member 121 may be formed flat. In this case, as shown in FIG. 3, the laminated member 110 includes an upper layer member 120 and a waterproof member 30, similar to the laminated member 10 described above. The upper layer member 120 includes a surface member 121, a base member 22, and an adhesion auxiliary member 123. The surface member 121 is bonded to the adhesion auxiliary member 123 via the first adhesive layer 24 , and the base member 22 is bonded to the adhesion auxiliary member 123 via the second adhesive layer 25 . The waterproof member 30 is bonded to the base member 22 via the third adhesive layer 26.

The surface member 121 is a shock absorbing member formed in a plate shape. The surface member 121 is a member having at least a flat back surface, and is made of, for example, polyethylene, polypropylene, or the like. The adhesion auxiliary member 123 includes a sheet portion 123b formed in a sheet shape and a protruding strip portion 123c protruding from the surface of the sheet portion 123b. The protruding portion 123c is formed in the same manner as the protruding portion 21c described above. The adhesion auxiliary member 123 is made of the same material as the adhesion auxiliary member 23 described above.

The laminated member 110 described above is manufactured by the same manufacturing method (manufacturing process) as the laminated member 10 described above.

(Second modification)
Furthermore, in the embodiment described above, the water channel 51 may be formed on the lower surface of the waterproof member 30 described above. Specifically, as shown in FIG. 4, the laminated member 210 includes an upper layer member 20, a waterproof member 230, and a water channel 51, similar to the laminated member 10 described above.
The upper layer member 20 is bonded to the waterproof member 230 via the third adhesive layer 26.

The waterproof member 230, like the adhesion auxiliary member 123 described above, includes a sheet portion 230b formed in a sheet shape and a plurality of protrusions 230c protruding from the back surface (lower surface) of the sheet portion 230b. The protruding portion 230c is formed in the same manner as the protruding portion 21c described above. The waterproof member 230 includes a groove 230d formed between adjacent protrusions 230c and a water channel 51.

The water channel 51 is formed between the waterproof member 230 (groove 230d) and the installation surface SF on which the waterproof member 230 is installed. The water channel 51 extends horizontally along the protruding portion 230c and has openings (not shown) at both ends. That is, the laminated member 210 has a plurality of water channels 51 that are parallel to each other. According to this water channel 51, it becomes possible to improve drainage performance between the laminated member 210 and the installation surface SF.

Note that the waterproof member 230 may be provided with a communication path that communicates the water channels 51 that are adjacent to each other. According to this, it becomes possible to further improve drainage performance between the laminated member 210 and the installation surface SF. Further, a water channel (formed similarly to the water channel 51) may be formed on the lower surface of the surface member 21, and a water channel may be formed on the upper surface of the adhesion auxiliary member 23. Further, a waterway may be formed on the upper surface of the foundation member 22, or a waterway may be formed on the lower surface of the foundation member 22.

Moreover, although each water channel mentioned above was formed along the horizontal direction of the laminated member, you may form the through-hole which connects these water channels formed along the horizontal direction in the vertical direction.

(Other variations)
Further, in the laminated member 10 described above, the adhesion auxiliary member 23 may be omitted. In this case, the laminated member according to the modification includes the surface member 21, the base member 22, and the waterproof member 30, but since it has the waterproof member 30, the base member 22 and the laminated member are infiltrated by water. can be suppressed.
Furthermore, in the laminated member 10 described above, the surface member 21 can also be omitted. In this case, the laminated member according to the modified example includes the foundation member 22 and the waterproof member 30, but since it has the waterproof member 30, it is possible to suppress infiltration of the foundation member 22 and the laminated member by water. Can be done.

Further, the above-mentioned surface member may be made waterproof. In this case, the laminated member preferably includes a surface member, a base member, and a waterproof member. According to this, since the foundation member is sandwiched between the waterproof surface member and the waterproof member, it is possible to suppress water infiltration from both sides (both upper and lower surfaces) of the foundation member, and the laminated member It becomes possible to suppress shape changes. For example, the laminated member includes the above-described surface member 121 (having waterproof properties), the base member 22, and the waterproof member 30. In this case, the adhesion auxiliary member 123 can be omitted.

(Actions and effects of embodiments)
The laminated members 10, 110, 210 according to the embodiments described above include upper layer members 20, 120 and waterproof members 30, 230 provided on the lower surfaces of the upper layer members 20, 120.

According to the laminated members 10, 110, 210, since the waterproof members 30, 230 are provided on the lower surfaces of the upper layer members 20, 120, infiltration (infiltration) of water from the lower surfaces of the upper layer members 20, 120 can be suppressed. Can be done. Therefore, changes in the shape of the upper layer members 20, 120 due to infiltration of water can be suppressed, and in turn, changes in the shape of the laminated members 10, 110, 210 can be suppressed.

Further, in the laminated members 10, 110, 210, the upper layer members 20, 120 preferably include a base member 22 and surface members 21, 121 provided on the upper surface side of the base member 22. According to this, it becomes possible to protect the upper surface side of the foundation member 22, where water infiltration from the lower surface side is suppressed by the waterproof member, by the surface members 21, 121. For example, by providing the surface members 21 and 121 with functions such as abrasion resistance and waterproofness, it becomes possible to protect the base member 22 from the viewpoint of abrasion resistance and waterproofness.

Further, in the laminated members 10, 110, 210, the upper layer members 20, 120 are provided between the base member 22 and the surface members 21, 121, and the base members 22 are bonded to the lower surface side of the surface members 21, 121. It is preferable to further include adhesion assisting members 23, 123 for assisting. According to this, since the adhesion auxiliary members 23, 123 can assist in adhesion between the base member 22 and the surface members 21, 121, it is possible to bond the base member 22 and the surface members 21, 121 to a desired adhesive strength. This makes it possible to properly bond.

Moreover, in the laminated members 10, 110, and 210, it is preferable that the base member 22 includes a crushed material. According to this, since it becomes possible to provide the waterproof members 30, 230 on the lower surface of the base member 22 provided with the crushed material, the lower surface side of the upper layer member 20, 120 provided with the crushed material that is relatively easily expanded by infiltration. It is possible to suppress the infiltration of water from the inside. Therefore, changes in the shape of the upper layer members 20, 120 due to infiltration of water can be suppressed, and in turn, changes in the shape of the laminated members 10, 110, 210 can be suppressed.

Furthermore, in the laminated members 10 and 210, the surface member 21 is preferably made of artificial grass. According to this, when artificial turf is used as the surface member 21, even if the base member 22 expands, the surface member 21 layer can absorb the deformation (the thickness and elasticity of the artificial turf are utilized). , it becomes possible to suppress changes in the overall shape of the laminated members 10 and 210.

Further, in the laminated members 10, 110, 210, the adhesion auxiliary members 23, 123 preferably have waterproof properties. According to this, it becomes possible to provide the adhesion auxiliary members 23, 123 having waterproof properties on the upper surface of the base member 22, so that water infiltration from the upper surface side of the base member 22 can be suppressed. Therefore, it is possible to suppress changes in the shape of the base member 22 and eventually the upper layer members 20, 120 due to water infiltration.

10,110,210...Laminated member, 20,120...Upper layer member, 22...Foundation member, 21,121...Surface member, 23,123...Adhesion auxiliary member, 30,230...Waterproof member.

Claims (6)

upper layer member;
a waterproof member provided on the lower surface of the upper layer member;
A laminated member characterized by comprising: The laminated member according to claim 1, wherein the upper layer member includes a base member and a surface member provided on the upper surface side of the base member. The upper layer member further includes an adhesion auxiliary member provided between the base member and the surface member to assist in adhering the base member to the lower surface side of the surface member. Item 2. Laminated member according to item 2. The laminated member according to claim 2, wherein the base member includes a pulverized material. The laminated member according to claim 2, wherein the surface member is artificial turf. The laminated member according to claim 3, wherein the adhesion auxiliary member is waterproof.

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