JP4523922B2 - Non-slip mat - Google Patents

Description

  The present invention relates to a non-slip mat that can exhibit high slip resistance even when used in a wet and slippery place such as a bathroom floor or in a bathtub.

  In a wet and slippery place such as a bathroom floor or in a bathtub, a resin mat called a non-slip mat is generally laid to prevent slipping and falling.

  Conventional anti-slip mats are generally based on thermoplastic resins such as polyethylene, polypropylene, ethylene vinyl acetate copolymer, and ethylene-propylene copolymer, and these thermoplastic resins are used as the base material. The anti-slip mat has a very small dynamic friction coefficient compared to the static friction coefficient, so that the position of the anti-slip mat tends to shift during use, and in some cases, there is a risk that the balance may be lost and fall down.

  In addition, since the thermoplastic resin itself, which is the base material of the non-slip mat, does not absorb water, when a conventional anti-slip mat is laid on, for example, a wet floor surface in a bathroom, the mat is placed between the mat and the floor surface. A water film is formed, and this water film extremely reduces the friction coefficient (static friction coefficient and dynamic friction coefficient) between the mat and the floor surface, making the anti-slip mat more slippery.

As means for solving such a problem, various techniques for providing a suction cup on the back surface of the non-slip mat have been proposed (see, for example, Patent Documents 1 and 2). According to such a non-slip mat with a sucker, the anti-slip mat can be firmly adsorbed and fixed to the floor surface by the suction force of the sucker, and the anti-slip mat can be prevented from slipping.
JP 2002-10938 A JP 2004-248698 A

  By the way, in order to exert the suction function of the suction cup in the conventional anti-slip mat with sucker, it is necessary to press the suction cup against the floor surface and firmly fix the non-slip mat with suction cup to the floor surface. In order to perform the fixing work, it is necessary to bend the body or put a face into the bathtub, and it is forced to work in a very unstable posture. In addition, if it becomes necessary to change the position of the anti-slip mat once adsorbed and fixed to the floor surface, the anti-slip mat must be peeled off against the suction force of the suction cups. It was very hard work for the free and elderly to do these tasks.

  In addition, when the non-slip mat is used, there is a problem that the rugged texture of the suction cups directly stimulates the skin and causes discomfort.

  The present invention has been made in view of such a conventional problem, and is easy to handle in spite of being able to obtain an anti-slip function due to the adsorption effect, and also has no slip-resistance and does not cause discomfort. It is to provide a very high non-slip mat.

  The invention according to claim 1 is an anti-slip mat 10, 10 ′, 10 ″ having an intermediate layer 12 and a surface layer 14 formed on both front and back surfaces of the intermediate layer 12. The surface layer 14 is made of a kneaded material of a thermoplastic elastic resin obtained by hydrogenating a butadiene copolymer, a foaming agent, and porous particles Z, and is substantially open-celled. Non-slip mats 10, 10 ′, 10 ″ characterized in that a group F is formed.

  In the present invention, “substantially open cell group F is formed” means that closed cells may be mixed, but it mainly consists of open cell group F and has air permeability as a whole. .

  Further, “the intermediate layer 12 is non-breathable” not only means that the intermediate layer 12 itself is made of a non-breathable material, but the intermediate layer 12 is made of a breathable material. However, it is a concept including a case where air permeability is ensured by an adhesive layer that bonds the intermediate layer 12 and the surface layer 14 together.

  In the non-slip mats 10, 10 ′, 10 ″ according to the present invention, the intermediate layer 12 is non-breathable, and the surface layer 14 is substantially breathable due to the formation of the open cell group F. Since the non-breathable intermediate layer 12 and the breathable surface layer 14 cooperate with each other, the entire anti-slip mat 10, 10 ', 10' 'can function as a suction cup. It becomes possible.

  That is, when a pressing force is applied from the outside to the anti-slip mat 10 by stepping on the anti-slip mats 10, 10 ′, 10 ″ laid on the floor surface, the open cell group F ′ of the portion where the pressing force is applied. Is crushed (see FIG. 2). Here, since the surface layer 14 on the side in contact with the floor surface is sandwiched between the non-breathable intermediate layer 12 and the floor surface, the inside of the crushed portion of the open cell group F ′ is inside. The pressure drops and it can act just like a suction cup and stick to the floor.

  On the other hand, when the pressing force is removed, the adsorption fixing effect is maintained for a while. However, as described above, the surface layer 14 is provided with air permeability, so that there is very little ambient air or water. Although it is one by one, it flows into the open cell group F ′. As a result, the internal pressure of the open cell group F ′ gradually returns to the original state, and the adsorption fixing effect is released.

  Thus, according to the anti-slip mats 10, 10 ′, 10 ″ of the present invention, when a pressing force is applied from the outside, such as by stepping on, the surface layer 14 of the portion where the pressing force is applied is applied to the floor surface. The suction fixing effect is obtained by sucking like a suction cup. Conversely, if the pressing force is removed, the suction fixing effect is gradually released.

  The surface layer 14 is made of a thermoplastic elastic resin obtained by hydrogenating a butadiene copolymer as a raw material, and the reason is not clear, but the static friction coefficient and the dynamic friction coefficient The surface layer 14 excellent in both can be obtained, and the anti-slip mats 10, 10 ′, 10 ″ having excellent slip resistance can be provided in combination with the adsorption fixing effect.

  The anti-slip mat 10, 10 ′, 10 ″ of the present invention is the entire anti-slip mat 10 by the cooperative action of the non-breathable intermediate layer 12 and the breathable surface layer 14 as described above. Therefore, a suction cup made of a separate member for adsorbing and fixing the non-slip mat to the floor surface is not required as in the prior art. Therefore, although the same suction fixing effect as that of the suction cup can be obtained, the conventional rugged discomfort does not occur.

  The invention described in claim 2 is characterized in that “a groove 16 is formed on the surface of at least the surface layer 14 on the side in contact with the floor surface”.

  In the present invention, the groove 16 can function as a drainage groove when the anti-slip mat 10 is laid in a wet place. Therefore, when a water film is interposed between the anti-slip mat 10 ′ and the floor surface, the water film can be pushed out of the anti-slip mat 10 ′ through the groove 16. As a result, the anti-slip mat 10 ′ and the floor surface can be directly contacted without interposing a water film, and the adsorption fixing effect of the anti-slip mat 10 ′ can be surely exhibited.

  The invention described in claim 3 is characterized in that “a draining hole 18 penetrating from one surface layer 14 to the other surface layer 14 is provided”.

  In the present invention, when the anti-slip mat 10 ″ is submerged in a bathtub, the hot water (water) can pass through the drain hole 18; A moderate resistance is generated and the anti-slip mat 10 ″ can be sunk straight into the bathtub.

  The invention according to claim 4 is characterized in that “the specific gravity of the intermediate layer 12 is greater than 1”. According to the present invention, even when the anti-slip mats 10, 10 ′, 10 ″ are used by being submerged in the bathtub, the anti-slip mats 10, 10 ′, 10 ″ are not lifted by buoyancy. .

  According to the present invention, a non-slip mat having excellent anti-slip properties that is easy to handle in spite of having an anti-slip function due to an adsorption fixing effect and that does not cause discomfort during use. Can be provided.

  Hereinafter, a non-slip mat to which the present invention is applied will be described in detail with reference to the illustrated embodiments.

[Example 1]
As shown in FIG. 1, the anti-slip mat 10 according to the present invention is roughly constituted by an intermediate layer 12 and a surface layer 14.

  The intermediate layer 12 is a non-breathable resin sheet-like member, and as its base material, an elastomer such as SBR (styrene butadiene rubber) or natural rubber having both strength and flexibility is preferable.

  Moreover, since it is necessary for the intermediate | middle layer 12 to prevent the anti-slip | matte mat 10 from floating by buoyancy when using the anti-slip | skid mat 10 in a bathtub, the specific gravity is set larger than one. It is desirable. As a means for increasing the specific gravity of the intermediate layer 12, a method of kneading a bulking agent (for example, sedimentary barium) into the elastomer is employed.

  The surface layer 14 is a sheet-like member made of a kneaded material containing at least a thermoplastic elastic resin, a foaming agent, and porous particles Z, and substantially formed with open cell groups F. It is formed on both sides.

  Here, “substantially open cell group F is formed” means that closed cells may be mixed, but it mainly consists of open cell group F and has air permeability as a whole.

  In addition, as a specific method for forming the open cell group F, for example, it can be achieved by appropriately combining a foaming agent, a foaming aid, and a crosslinking agent. As a simpler method, a thermoplastic substance and a foaming agent can be used. This can be achieved by adding the porous particles Z to the kneaded product and foaming them, whereby a foamed body consisting of the open cell group F (ie, the surface layer 14) is obtained.

  The thermoplastic elastic resin is a base material for the surface layer 14, and is an olefinic thermoplastic elastic resin obtained by hydrogenating a butadiene copolymer (for example, trade name: SOE-SO, manufactured by Asahi Kasei Chemicals Corporation). ) Is used as is. In addition, even if this thermoplastic elastic resin adds a filler (filler) in large quantities, since a softness | flexibility is not impaired, the design freedom of the surface layer 14 can be raised.

  The foaming agent is for forming open cells in the surface layer 14, and those known in the art can be used, but chemical foaming agents are particularly preferable, and organic foaming agents and inorganic foaming agents are used. Any of the foaming agents can be used.

  Of these chemical foaming agents, the thermal decomposition type is preferably used, but may be a reactive type. For example, pyrolytic inorganic foaming agents include carbonates, bicarbonates, nitrites, hydrides, and the like. Specific examples include sodium bicarbonate and ammonium carbonate. Thermal decomposition type organic foaming agents include azo compounds, hydrazine derivatives, semicarbazide compounds, azides, nitrosates, triazoles, etc., specifically azodicarbonamide, N, N′-dinitrosopentamethylene. And tetramine, 4,4′-oxybis (benzenesulfonylhydrazide), and the like.

  The porous particles Z function as foaming nuclei when the foaming agent is foamed, and are suitable in that they can slightly absorb foaming gas and control the degree of expansion during foaming and expansion. Moreover, after forming a foam (surface layer 14), it is suitable also at the point which can show | play effects, such as deodorizing, deodorizing, moisture absorption / release.

  The porous particles Z may be either inorganic particles or organic particles. For example, the former includes those derived from ceramic, iron oxide, ore, and specifically, acidic particles. Treated clay, fuller's earth, activated alumina, molecular sieve, zeolite, artificial zeolite, white clay, hydrous or anhydrous silicic acid, silica gel, activated carbon, perlite, vermiculite, magnesia, etc. (in this embodiment, zeolite is used as the porous particle Z) Adopted). Examples of the latter include rice husk, charcoal, and dextrin.

  The “powder” is a concept including not only granular and powdery but also fine fibers. Moreover, the said porous particle Z may be used by 1 type, and 2 or more types may be mixed and used for it.

  The foaming aid is added as necessary when forming the surface layer 14, and specific examples thereof include zinc white, urea, zinc stearate, salicylic acid, and the like.

  Similarly to the foaming aid, the crosslinking agent is added as necessary when forming the surface layer 14, and specific examples thereof include peroxyketal, dialkyl peroxide, and the like. , Di (t-butylperoxyisopropyl) diisopropylbenzene, dicumyl peroxide and the like.

  Next, a method for manufacturing the anti-slip mat 10 will be described. First, for the intermediate layer 12, according to the formulation described in Table 1 below, and for the surface layer 14, according to the formulation described in Table 2 below, each formulation is individually opened roll, Banbury mixer, pressurized Each kneaded product for producing the non-slip mat 10 was prepared by uniformly kneading with a kneader or the like.

  Each of the obtained kneaded materials was molded with a roll, extrusion air or the like to obtain intermediate layer kneaded material 12 'and surface layer kneaded material 14'. At this time, the intermediate layer kneaded material 12 ′ was formed to a thickness of about 2 mm, and the surface layer kneaded material 14 ′ was formed to a thickness of about 1 mm.

Next, the intermediate layer kneaded material 12 ′ and the two surface layer kneaded materials 14 ′ are laminated in the heating / pressurizing press (at this time, the intermediate layer kneaded material 14 ′). Each kneaded product is laminated in a sandwich shape so that 12 ′ is disposed.) After that, by a one-stage heating / pressure foaming method, the temperature is 150 to 180 ° C. and the pressure is 150 to 100 kg / cm ² at 10. Hold for ~ 15 minutes. Thereby, the intermediate layer 12 is obtained from the intermediate layer kneaded material 12 ', and the surface layer kneaded material 14' is foamed and expanded from the surface layer kneaded material 14 ', whereby the surface layer 14 is obtained. As a result, the intended anti-slip mat 10 was obtained. The specific gravity of the intermediate layer 12 was about 2.7 g / cm ³ , which was very large compared to the specific gravity of water (1.0 g / cm ³ ).

  When using the non-slip mat 10 formed as described above, it is only necessary to lay it on a target place (for example, a floor surface of a bathroom or a bottom surface of a bathtub).

  When a pressing force is applied to the anti-slip mat 10 from the outside by, for example, stepping on the anti-slip mat 10 laid on the floor surface of the bathroom, the open cell group F ′ in the portion where the pressing force is applied is crushed. (See FIG. 2).

  Here, since the surface layer 14 on the side in contact with the floor surface is sandwiched between the non-breathable intermediate layer 12 and the floor surface, the inside of the crushed portion of the open cell group F ′ is inside. The pressure decreases, and as a result, the non-slip mat 10 can act just like a suction cup and stick to the floor surface (that is, the non-slip mat 10 is adsorbed and fixed to the floor surface). ).

  On the other hand, when the pressing force is removed, the adsorption and fixing effect is maintained for a while. However, as described above, the surface layer 14 is provided with air permeability and water permeability. Although it is very small, it flows into the open cell group F ′. As a result, the internal pressure of the open cell group F ′ eventually returns to the original state, and the adsorption fixing effect is released. In addition, it is thought that the inflow of moisture into the open cell group F ′ is caused by capillary action of the open cell group F (F ′) or the porous particles Z existing in the open cell group F (F ′). .

  As described above, according to the anti-slip mat 10 of the present invention, an adsorption fixing effect similar to that of the suction cup can be obtained only by applying a pressing force from the outside to the anti-slip mat 10 by stepping with a foot or the like. The suction fixing effect is naturally canceled by removing the pressing force by retreating from the mat 10 or the like. Therefore, unlike the conventional anti-slip mat with a suction cup, the troublesome work for expressing the suction cup function is not required, and the handling is very simple.

  Further, as described above, the anti-slip mat 10 of the present invention allows the entire anti-slip mat 10 to function as a suction cup by the cooperative action of the non-breathable intermediate layer 12 and the breathable surface layer 14 as described above. There is no need to separately provide a suction cup made of a separate member as in the prior art. Therefore, there is no gritty discomfort during use.

  The surface layer 14 is made of a thermoplastic elastic resin obtained by hydrogenating a butadiene copolymer as a raw material. The reason for this is not always clear, but the static friction of the surface layer 14 is not clear. It is possible to obtain the surface layer 14 having both excellent coefficient and dynamic friction coefficient (static friction coefficient 0.83, dynamic friction coefficient 0.82; based on the test result in accordance with JIS K 7125: 1999), which is also combined with the above-mentioned adsorption fixing effect. Thus, the non-slip mat 10 having excellent slip resistance can be obtained.

  Note that the high slip resistance of the anti-slip mat 10 is due to the combination of the material of the base material of the surface layer 14 (that is, a thermoplastic elastic resin obtained by hydrogenating a butadiene copolymer) and the adsorption effect. It is exhibited for the first time, and only one of them cannot exhibit sufficient slip resistance.

  Further, since the open cell group F and the porous particles Z of the surface layer 14 are capable of absorbing moisture by capillarity as described above (that is, provided with water absorption), the anti-slip mat 10 and Even when a water film is present between the floor surface and the floor surface, the surface layer 14 absorbs the water film and directly contacts the anti-slip mat 10 (more specifically, the surface layer 14) with the floor surface. Can be made. Therefore, the static friction coefficient and the dynamic friction coefficient are not reduced due to the presence of the water film as in the conventional case.

  Further, as described above, since the surface layer 14 is provided with water absorption, when the anti-slip mat 10 is submerged in the bathtub, the surface layer absorbs hot water in the bathtub and the anti-slip mat 10 The whole warms up quickly. Therefore, even if the anti-slip mat 10 is put in the bathtub just before bathing, the skin does not touch the anti-slip mat 10 and become disappointed.

  Further, if the anti-slip mat 10 is immersed in a bathtub, the porous particles Z in the open cell group F can adsorb chlorine or the like present in the hot water. Therefore, even a person with sensitive skin whose skin is roughened by harmful substances such as chlorine contained in tap water can take a bath with peace of mind.

Furthermore, since the specific gravity of the intermediate layer 12 is greater than 1, even when the anti-slip mat 10 is used in a bathtub, the intermediate layer 12 does not lift up due to buoyancy. Moreover, when the specific gravity of the intermediate layer 12 is set to be much larger than 1 as in this embodiment (specifically, the specific gravity is preferably 2 or more. In this embodiment, the specific gravity of the intermediate layer 12 is About 2.7 g / cm ³ ), a heavy weight anti-slip mat 10 can be obtained. Here, when a large weight of the non-slip mat 10 is laid on the wet floor surface, a water film sandwiched between the anti-slip mat 10 and the floor surface causes the anti-slip mat 10 to be caused by its own weight. Pushed outward. In other words, the non-slip mat 10 and the floor surface are in direct contact simply by laying the anti-slip mat 10, and it is possible to suppress a decrease in the static friction coefficient and the dynamic friction coefficient due to the water film.

  When the obtained anti-slip mat 10 is compressed with a roller or the like, as shown in FIG. 3, the porous particles Z (Z1) adhered to the inner walls of the open cell group F are separated from the inner walls, or porous. The bubble film piece f covering the surface of the porous particle Z (Z2) is peeled off, the lump of the porous particles Z (Z3) adhering in the open cell group F is divided, or the porous particles Z itself can be pulverized, and porous particles Z that could not contribute to the development of the function as they are can be exposed in the foam group F. Then, the functions of the porous particles Z (that is, the moisture absorption / release function, the gas adsorption function, etc.) can be enhanced to the maximum as the entire anti-slip mat 10.

[Example 2]
The anti-slip mat 10 ′ of the second embodiment is an example in which grooves 16 are formed on the entire surface of the surface layer 14.

  The groove 16 functions as a drainage groove when the anti-slip mat 10 ′ is laid on a wet floor surface. In this embodiment, a plurality of grooves 16 extending linearly in an oblique direction are spaced at predetermined intervals. (As a result, a substantially diamond-shaped concavo-convex pattern is formed on the surface of the surface layer 14). The end of each groove 16 is formed so as to reach the side surface of the surface layer 14, whereby the groove 16 can function more effectively as a drainage groove.

  Various methods such as a method of cutting the surface of the surface layer 14 can be considered as a method of forming the groove 16. In this embodiment, a mold having a corresponding concavo-convex pattern formed on the surface of the surface layer 14 by hot pressing The tightening method is adopted. The groove 16 may be formed at least on the surface of the surface layer 14 on the side in contact with the floor surface.

  When the non-slip mat 10 'is laid on a wet floor surface, a water film sandwiched between the anti-slip mat 10' and the floor surface is pushed out of the anti-slip mat 10 'through the groove 16. It is. Therefore, the non-slip mat 10 ′ and the floor surface can be in direct contact without interposing a water film, and the suction cup effect of the anti-slip mat 10 ′ can be more reliably exhibited.

  The configuration of the groove 16 is not limited to the above embodiment, and various shapes such as a wave shape and a zigzag shape can be considered.

[Example 3]
Moreover, you may make it form the hole 18 for draining penetrated from one surface layer 14 to the other surface layer 14 like the non-slip | skid mat 10 '' shown in FIG.

  According to this embodiment, when the non-slip mat 10 ″ is used by being submerged in a bathtub, the hot water can pass through the drain hole 18; A moderate resistance is generated and the anti-slip mat 10 ″ can be sunk straight into the bathtub.

  The groove 16 and the hole 18 may be formed independently, or both may be formed at the same time.

It is a figure which shows 1st Example of this invention. It is the elements on larger scale which show the state of the surface layer when a pressing force is provided to the non-slip mat. It is the elements on larger scale which show the state of the surface layer 14 when a slip mat | matte is compressed with the roller. It is a figure which shows 2nd Example of this invention. It is a figure which shows 3rd Example of this invention.

Explanation of symbols

10, 10 ', 10''... non-slip mat 12 ... intermediate layer 14 ... surface layer 16 ... groove 18 ... hole F ... open cell Z ... porous particles

Claims (4)

An anti-slip mat having an intermediate layer and surface layers formed on both front and back surfaces of the intermediate layer,
The intermediate layer is non-breathable;
The surface layer is made of a kneaded material containing a thermoplastic elastic resin obtained by hydrogenating a butadiene copolymer, a foaming agent, and porous particles, and substantially open cell groups are formed. Non-slip mat characterized by.   The anti-slip mat according to claim 1, wherein a groove is formed on the surface layer of at least the surface layer in contact with the floor surface.   The anti-slip mat according to claim 1 or 2, wherein a water draining hole penetrating from the one surface layer to the other surface layer is formed.   The anti-slip mat according to any one of claims 1 to 3, wherein the specific gravity of the intermediate layer is greater than 1.

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