JP2004256704A - Elastomeric member and method for producing elastomeric member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastomeric member having a structure in which a coating film is formed on the surface of a base material composed of a gel-like resin material, having high adhesiveness to a base material surface of the coating film and not causing release of the coating film readily and to provide a method for producing the elastomeric member. <P>SOLUTION: The elastomeric member 1 is equipped with a base material 3 formed of the gel-like resin material and a coating film 5 formed on the surface of the base material 3. The gel-like resin material forming the base material 3 comprises 100 pts. wt. styrene-based thermoplastic elastomer (particularly a styrene-ethylene-propylene-styrene copolymer; SEPS) and 600 pts. wt. hydrocarbon-based process oil as main components and further, a small amount of a filler and an antioxidant. The coating film 5 is formed on the surface of the base material 3 by coating the surface of the base material 3 with a coating agent containing a chloroprene latex (CR latex) as a main component. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【００３４】
以上の試験結果のうち、試料１，２が本発明の実施例に相当する。また、試料３〜７は比較例である。
試料１，２については、コーティング剤の主成分およびコーティング方法に違いはあるものの、試料１，２のどちらにも、密着性に優れ経時変化にも問題がないコーティング被膜５が形成されていた。このことから、ラテックスを主成分とするコーティング剤は、コーティング方法によらず、基材３を劣化させることなくコーティング被膜５を形成できることが理解できる。また、試料１，２とも、コーティング被膜５がきわめて柔らかくて伸縮性も高いため、基材３の伸縮に対する追従性がよく、コーティング後もきわめて低硬度な状態が維持されていた。
【００３５】
試料３，４は、コーティング剤の主成分をウレタン・溶剤系としたものである。ウレタン系のコーティング被膜５は、ラテックス系のコーティング被膜５に比べ、基材３に対する密着性に多少難があり、また、溶剤によって基材３が侵されるという問題もあった。これらの問題は、試料３よりも試料４の方で顕著であった。また、ウレタン系のコーティング被膜５は、ラテックス系のコーティング被膜５に比べ、基材３の伸縮に対する追従性もいくらか劣るものであった。
【００３６】
試料５は、コーティング剤の主成分をアクリル・溶剤系としたものである。アクリル系のコーティング被膜５は、試料３，４と比べても、さらに基材３に対する密着性に問題があり、基材３の伸縮に対する追従性も悪いものであった。
試料６，７は、コーティング剤の主成分をスチレン・溶剤系としたものである。試料６は、基材３と同じ系統のスチレン系成分を含むコーティング剤であったためか、密着性に優れたコーティング被膜５を形成できたが、経時変化により、基材３の溶解が発生した。これは、コーティング剤が、スチレン系成分と相溶性の高い溶剤を含んでいることに原因があると推察される。試料７は、スプレー法でコーティング被膜５を形成したものであり、これにより、経時変化による基材３の溶解は抑制できるようになるものの、密着性が低下してしまうという問題があった。つまり、試料６，７からは、スチレン・溶剤系のコーティング剤では、密着性の向上と経時変化による劣化防止を両立させることが困難であることが理解できる。
【００３７】
以上説明したように、上記試料１，２においては、コーティング被膜５を形成するに当たって、溶剤を含まないラテックス（クロロプレンゴムラテックス（ＣＲラテックス）、アクリロニトリル−ブタジエンゴムラテックス（ＮＢＲラテックス））を主成分とするコーティング剤を使用したので、他の溶剤系のコーティング剤とは異なり、基材３を形成するゲル状樹脂材料を溶かすことなく、基材３の表面に所期のコーティング被膜５を形成することができる。
【００３８】
しかも、上記試験結果から明らかなように、コーティング被膜５は、ゲル状樹脂材料からなる基材３の表面との密着性がきわめて高いものであるため、コーティング被膜５が基材３の表面から簡単に剥離してしまうこともない。
また、コーティング被膜５は、クロロプレンゴムラテックス（ＣＲラテックス）、アクリロニトリル−ブタジエンゴムラテックス（ＮＢＲラテックス）によって形成されたものであり、きわめて柔軟に伸縮するので、低硬度のゲル状樹脂材料からなる基材３の曲げや伸びによく追従して変形し、基材３の柔軟性を損ねることがない。
【００３９】
さらに、基材３を構成するのに利用したゲル状樹脂材料は、オイルブリード現象によってオイルが滲み出しやすい性質を有するものの、このエラストマー部材１の場合、基材３の表面にコーティング被膜５が形成された構造になっているので、コーティング被膜５によってオイルが遮断され、エラストマー部材１の外面までオイルが滲み出てしまうことがない。
【００４０】
したがって、このようなエラストマー部材１であれば、オイルが移行すると問題になるような部材（例えば、オイル染みなどによって汚損すると商品価値が低下するような部材）に対してでも、直接接触させるような配置方法をとることができる。
【００４１】
また、エラストマー部材１の表面にタック性が無いので、タック性があると問題になるような部材に対してでも、直接接触させるような配置方法をとることができる。
以上、本発明の実施形態について説明したが、本発明は上記の具体的な一実施形態に限定されず、この他にも種々の形態で実施することができる。
【００４２】
例えば、上記実施形態においては、ラテックスとして、クロロプレンゴムラテックス（ＣＲラテックス）、アクリロニトリル−ブタジエンゴムラテックス（ＮＢＲラテックス）を用いる例を示したが、他のラテックスを用いてコーティング被膜を形成してもよい。例えば、天然ゴムラテックス（ＮＲラテックス）、スチレン−ブタジエンゴムラテックス（ＳＢＲラテックス）、ブタジエンゴムラテックス（ＢＲラテックス）、メチルメタクリレート−ブタジエンゴムラテックス（ＭＢＲラテックス）、２−ビニルピリジン−スチレン−ブタジエンゴムラテックス（ＶＰラテックス）、イソプレンゴムラテックス（ＩＲラテックス）、イソブテン−イソプレンゴムラテックス（ＩＩＲラテックス）などを用いてコーティング被膜を形成してもよい。ただし、より耐油性に優れたコーティング被膜を形成したい場合には、アクリロニトリル−ブタジエンゴムラテックス（ＮＢＲラテックス）、またはクロロプレンゴムラテックス（ＣＲラテックス）のいずれかを用いると望ましい。
【００４３】
また、上記実施形態においては、基材３を形成する材料として、特定の物質を特定の配合比で含むゲル状樹脂材料を例示したが、これ以外のゲル状樹脂材料を用いてもよい。例えば、ゲル状樹脂材料を形成するベースポリマーとしては、スチレン系、エステル系、アミド系、ウレタン系などの各種熱可塑性エラストマー、並びに、それらの水添、その他による変性物、あるいは、スチレン系、ＡＢＳ系、オレフィン系、塩化ビニル系、アクリル酸エステル系、メタクリル酸エステル系、カーボネート系、アセタール系、アミド系、ハロゲン化ポリエーテル系、ハロゲン化オレフィン系、セルロース系、ビニリデン系、ビニルブチラール系、アルキレンオキサイド系などの熱可塑性樹脂、およびこれらの樹脂のゴム変性物などを用いることができる。これらは、単独で用いてもよいし、相性のよいもの同士であれば、２種以上をブレンドして用いてもよい。また、ゲル状樹脂材料に含まれるオイルについても、各種ゴム用または樹脂用の軟化剤を使用することができ、ベースとなるポリマーとの相性がよいものであれば、親水性、疎水性のいずれの軟化剤でも問題なく、鉱物油系、植物油系、合成系等、どのようなタイプの軟化剤でも構わない。これらのオイルについても、１種を単独で用いてもよいし、互いの相溶性が良好であれば２種以上を混合して用いてもよい。これらベースポリマーおよびオイルの配合比は、オイルの量が多いほどゲル状樹脂材料の硬度は低いものとなるので、所望の硬度となるように適宜調製すればよい。
【図面の簡単な説明】
【図１】本発明の実施形態として説明したエラストマー部材を示し、（ａ）はその斜視図、（ｂ）はその断面図である。
【符号の説明】
１・・・エラストマー部材、３・・・基材、５・・・コーティング被膜。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an elastomer member.
[0002]
[Prior art]
Conventionally, an elastomer member formed of a low-hardness gel-like resin material has been known. This type of elastomer member is used, for example, as a cushioning material, a vibration damping material, a packing, and the like (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-8-259758
[Problems to be solved by the invention]
Incidentally, the gel-like resin material generally tends to cause an oil bleed phenomenon. Therefore, it may not be possible to adopt an arrangement method in which the gel resin material is brought into direct contact with a member that causes a problem when the oil migrates (for example, a member whose commercial value decreases when the oil is contaminated). .
[0005]
Further, the tackiness of the surface of the gel-like resin material becomes a problem, so that an arrangement method that directly contacts the gel-like resin material may not be taken.
Then, the inventors considered that the surface of the base material made of the gel-like resin material may be covered with a coating film to thereby suppress oil bleed and tackiness of the surface.
[0006]
However, when the surface of the gel-like resin material was coated with various coating agents, many coating agents showed low adhesion between the coating film and the surface of the gel-like resin material, and the coating film came off the surface of the base material. There was a problem that it was easily peeled off. Further, depending on the type of the coating agent, the gel-like resin material is dissolved, so that the shape of the base material cannot be maintained.
[0007]
The present invention has been made in order to solve the above problems, and an object thereof is to provide a structure in which a coating film capable of suppressing oil bleed and tackiness is formed on a surface of a base material made of a gel resin material. It is another object of the present invention to provide an elastomer member in which the coating film has high adhesion to the substrate surface and the coating film is not easily peeled off, and a method for producing the same.
[0008]
Means for Solving the Problems and Effects of the Invention
In order to achieve the above object, the present invention employs the following characteristic configuration.
That is, the elastomer member of the present invention is obtained by forming a coating film on the surface of the base material by coating the surface of the base material formed of the gel resin material with a coating agent containing latex as a main component. .
[0009]
Further, the method for producing an elastomer member of the present invention,
A method for producing an elastomer member formed by forming a coating film on the surface of the base material by coating the surface of the base material formed of the gel resin material with a coating agent,
The coating agent is a coating agent containing latex as a main component.
[0010]
In the above-mentioned elastomer member, the gel-like resin material used for forming the base material is an extremely low-hardness material in which oil is contained in gaps between tissues formed by the molecular chains of the base polymer.
The base polymer is not particularly limited as long as it is a polymer that does not cause any inconvenience in forming the gel resin material. Typical examples thereof include various types of heat, such as styrene, ester, amide, and urethane. Plastic elastomers and their hydrogenated or modified products, or styrene, ABS, olefin, vinyl chloride, acrylate, methacrylate, carbonate, acetal, amide, halogen Thermoplastic resins such as polyether-based, halogenated olefin-based, cellulose-based, vinylidene-based, vinylbutyral-based, and alkylene oxide-based resins, and rubber-modified products of these resins. These may be used alone or as a mixture of two or more compatible ones.
[0011]
As the oil, any oil may be used as long as it does not cause any inconvenience in finally forming the gel resin material. Usually, a liquid or liquid material at room temperature is suitably used. More specifically, for example, a softener for various rubbers or resins can be used, and any one of a hydrophilic softener and a hydrophobic softener that is compatible with the base polymer can be used. In addition, any type of softener such as a mineral oil, a vegetable oil, and a synthetic oil may be used. These oils may be used alone or as a mixture of two or more as long as they have good compatibility with each other.
[0012]
The mixing ratio of the base polymer and the oil is such that the higher the amount of the oil, the lower the hardness of the gel resin material. For example, if the gel-like resin material is obtained by blending 50 to 2000 parts by weight of a hydrocarbon-based process oil as a softener with respect to 100 parts by weight of a styrene block copolymer, A low-hardness gel-like resin material suitable for being used as a material, a vibration damper, a packing, or the like can be obtained. Furthermore, when the present elastomer member is used in these applications, various additives and fillers are added to the gel resin material as needed to impart flame retardancy, conductivity, vibration damping properties, etc. Or may be improved.
[0013]
The substrate made of such a gel-like resin material is formed into a shape suitable for the purpose. For example, if the packing is interposed in a specific portion, it is processed by a known molding method (for example, injection molding) so as to have a shape suitable for the specific portion. Alternatively, the base material may be formed as a versatile sheet material, and cut and used as needed.
[0014]
The coating agent used to form the coating film contains latex as a main component. Latex is an aqueous emulsion containing a rubber component as a coating film as a dispersoid and water as a dispersion medium.
Examples of such latex include natural rubber latex (NR latex), styrene-butadiene rubber latex (SBR latex), butadiene rubber latex (BR latex), methyl methacrylate-butadiene rubber latex (MBR latex), 2-vinylpyridine -Styrene-butadiene rubber latex (VP latex), isoprene rubber latex (IR latex), or isobutene-isoprene rubber latex (IIR latex) can be used. When it is desired to form a coating film having better oil resistance, it is preferable to use either acrylonitrile-butadiene rubber latex (NBR latex) or chloroprene rubber latex (CR latex) as the latex. The rubber component contained in these latexes may be a single component, or a graft or blend of two or more components.
[0015]
In addition, the coating agent may contain components other than the above main components as long as the physical properties of the finally obtained coating film are not impaired.For example, a pigment for making the coating film an arbitrary color In addition, an antimicrobial agent, a preservative, a stabilizer and the like may be contained.
[0016]
These coating agents can be applied to the surface of the substrate by any coating method (for example, dipping, spraying, coater, etc.) according to the form of the substrate, thereby forming an intended coating film. .
The elastomer member configured as described above can have an extremely low hardness, but is preferably a low hardness body having an Asker FP hardness of 0.1 to 90. This is because when the Asker FP hardness is less than 0.1, a large amount of the softening agent is added, so that the compression set tends to increase. Further, if the Asker FP hardness is more than 90, it may be difficult to use depending on the application, such as a decrease in impact absorbing ability and a deterioration in moldability. The Asker FP hardness is a hardness that can be measured by an Asker FP hardness meter manufactured by Kobunshi Keiki Co., Ltd. JIS A hardness of "JIS K6253" is known as one of the relatively general standards regarding hardness, but Asker FP hardness is a low hardness material for which it is difficult to obtain a measurement value having a significant difference in JISA hardness. This is a standard used when measuring hardness.
[0017]
In the elastomer member configured as described above, the coating agent containing latex as a main component is different from other solvent-based coating agents in that the desired coating is performed on the surface of the base material without dissolving the gel resin material. A coating can be formed.
[0018]
In addition, since the coating film formed on the surface of the base material has extremely high adhesion to the surface of the gel resin material, the coating film does not easily peel off from the surface of the base material.
In addition, since the coating film formed by latex expands and contracts very flexibly, it deforms by following the bending and elongation of the low-hardness gel-like resin material, and does not impair the flexibility of the base material.
[0019]
Furthermore, the gel-like resin material used for forming the base material has a property that oil easily oozes out due to an oil bleed phenomenon, but in the case of this elastomer member, a structure in which a coating film is formed on the surface of the base material. Therefore, the oil is blocked by the coating film, and the oil does not seep to the outer surface of the elastomer member.
[0020]
Therefore, with such an elastomer member, an arrangement in which even a member that causes a problem when the oil migrates (for example, a member whose commercial value is reduced when soiled by oil stain or the like) is directly contacted. You can take the method.
[0021]
In addition, since the surface of the coating film does not have strong tackiness such as the surface of a gel-like resin material, an arrangement method that directly contacts even a member in which tackiness of the contact surface is a problem should be adopted. Will be able to
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to some examples.
FIG. 1A is a perspective view of an elastomer member 1 exemplified as an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the elastomer member 1.
[0023]
The elastomer member 1 includes a substrate 3 formed of a gel resin material and a coating film 5 formed on the surface of the substrate 3.
The gel resin material forming the base material 3 mainly includes 100 parts by weight of a styrene-based thermoplastic elastomer (specifically, styrene-ethylene-propylene-styrene copolymer; SEPS) and 600 parts by weight of a hydrocarbon-based process oil. As a component, it contains a small amount of a filler and an anti-aging agent in addition to these main components.
[0024]
The coating film 5 is formed on the surface of the substrate 3 by coating the surface of the substrate 3 with a coating agent described below.
Such an elastomer member 1 can be manufactured by the following procedure.
First, the resin composition to be the base material 3 is formed into a desired shape by a known molding method (for example, injection molding).
[0025]
Subsequently, oil, dust, rust, moisture and the like adhering to the surface of the substrate 3 are removed. If necessary, an undercoat with a primer may be applied.
Then, the surface of the substrate 3 is coated with a coating agent by an arbitrary coating method such as a dipping (immersion coating) method, a coater method, and a spray method.
[0026]
For example, if the dipping method is described as an example, the substrate 3 is hung with a wire (or a string or a dedicated jig) and slowly dipped (for example, at a speed of about 5 mm / sec) into the coating agent. . When the substrate 3 is completely immersed in the coating agent, the substrate 3 is slowly pulled up (for example, at a speed of about 5 mm / sec). If the speed of raising and lowering the base material 3 is too fast, air bubbles or dripping easily occur on the surface. If such a tendency is observed, appropriate adjustment such as lowering the speed when raising or lowering the base material 3 is performed. Do. When performing recoating, dipping is repeated with an appropriate open time (for example, about 10 minutes). Thereafter, heat treatment (coagulation / drying) is performed under processing conditions (for example, 70 ° C., 60 minutes) specified for each coating agent to form a coating film 5. Thereby, the expected elastomer member 1 can be obtained. Even in the case of a coater method, a spray method, or the like, similar procedures can be performed, but the same coating film can be formed.
[0027]
Next, seven kinds of samples (= elastomer members) were prepared by changing the main component of the coating agent and the coating method, and the adhesion and the change with time of the coating film 5 were confirmed for these seven kinds of samples.
The procedure for checking the adhesion of the coating film 5 is as follows.
[0028]
First, the coating film 5 is cut in a grid pattern using a cutter knife. These cuts were formed in a grid pattern by forming 11 cuts each having a length of 1 cm at an interval of 1 mm in length and width, and 100 cuts of 1 mm square partitioned by cuts were formed in a 1 cm square area. It is in the state.
[0029]
Then, an adhesive tape (a cellophane tape in this embodiment) is attached so as to cover the area including the 1 cm square area, and the adhesive tape and the coating film 5 are sufficiently adhered to each other. The adhesion was confirmed by the number of squares remaining on the substrate 3 side without being peeled off together with the adhesive tape among the 100 squares described above.
[0030]
That is, the higher the adhesion, the number of remaining squares approaches 100, while the lower the adhesion, the number of remaining squares approaches 0. You can do it.
Regarding the evaluation of the adhesion, ◎: 100/100 (= no peeling), ：: 90/100 or more, Δ: 70/100 or more, ×: less than 70/100, and four grades or more.
[0031]
Regarding the change with time of the coating film 5, the elastomer member 1 was left at normal temperature for one week, and it was visually observed whether or not any change (deterioration or deterioration) occurred in the base material 3 or the coating film 5. .
Regarding the evaluation of the change over time, ◎: no problem, ：: deterioration was mainly observed only on the coating film 5 side, but the degree was slight, Δ: slight deterioration occurred on the base material 3 side, C: Serious deterioration such as dissolution of the base material 3 has occurred.
[0032]
Table 1 below summarizes the test results of each sample and its adhesiveness and change over time.
[0033]
[Table 1]

[0034]
Of the above test results, samples 1 and 2 correspond to examples of the present invention. Samples 3 to 7 are comparative examples.
Regarding Samples 1 and 2, although there were differences in the main components of the coating agent and the coating method, both of Samples 1 and 2 had a coating film 5 which was excellent in adhesion and had no problem with aging. From this, it can be understood that the coating agent mainly composed of latex can form the coating film 5 without deteriorating the base material 3 regardless of the coating method. In both samples 1 and 2, the coating film 5 was very soft and had high elasticity, so that it had good followability to the expansion and contraction of the base material 3 and maintained an extremely low hardness after coating.
[0035]
In Samples 3 and 4, the main component of the coating agent was a urethane / solvent system. The urethane-based coating film 5 has some difficulty in adhesion to the substrate 3 as compared with the latex-based coating film 5, and has a problem that the substrate 3 is attacked by the solvent. These problems were more prominent in sample 4 than in sample 3. Further, the urethane-based coating film 5 was somewhat inferior to the expansion / contraction of the base material 3 as compared with the latex-based coating film 5.
[0036]
Sample 5 is one in which the main component of the coating agent is an acryl / solvent system. The acrylic coating film 5 had a further problem in adhesion to the substrate 3 as compared with the samples 3 and 4, and also had poor followability to expansion and contraction of the substrate 3.
In Samples 6 and 7, the main component of the coating agent was a styrene / solvent system. Sample 6 was able to form a coating film 5 having excellent adhesion, probably because it was a coating agent containing a styrene-based component of the same system as the substrate 3, but the substrate 3 was dissolved due to aging. This is presumed to be due to the fact that the coating agent contains a solvent having high compatibility with the styrene component. In Sample 7, the coating film 5 was formed by the spray method, and although dissolution of the base material 3 due to aging could be suppressed, there was a problem that the adhesion was reduced. That is, it can be understood from Samples 6 and 7 that it is difficult to achieve both improvement in adhesion and prevention of deterioration due to aging with a styrene / solvent-based coating agent.
[0037]
As described above, in forming the coating film 5 in the samples 1 and 2, the latex (chloroprene rubber latex (CR latex), acrylonitrile-butadiene rubber latex (NBR latex)) containing no solvent was used as a main component. Unlike the other solvent-based coating agents, the desired coating film 5 is formed on the surface of the substrate 3 without dissolving the gel-like resin material forming the substrate 3, unlike the other solvent-based coating agents. Can be.
[0038]
Moreover, as is clear from the above test results, the coating film 5 has extremely high adhesion to the surface of the base material 3 made of a gel resin material. It does not peel off.
The coating film 5 is formed of chloroprene rubber latex (CR latex) or acrylonitrile-butadiene rubber latex (NBR latex), and expands and contracts extremely flexibly, so that a base material made of a low-hardness gel resin material is used. Deformation follows the bending and elongation of the base material 3 well, and does not impair the flexibility of the base material 3.
[0039]
Further, the gel resin material used for forming the base material 3 has a property that oil easily oozes out due to an oil bleed phenomenon, but in the case of the elastomer member 1, the coating film 5 is formed on the surface of the base material 3. With this structure, the oil is blocked by the coating film 5 and the oil does not seep to the outer surface of the elastomer member 1.
[0040]
Therefore, with such an elastomer member 1, it is possible to directly contact even a member that is problematic when the oil migrates (for example, a member whose commercial value is reduced when the oil is stained by oil stain or the like). An arrangement method can be adopted.
[0041]
In addition, since the surface of the elastomer member 1 has no tackiness, an arrangement method of directly contacting even a member having a problem with tackiness can be adopted.
As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described specific embodiment, and can be implemented in various other modes.
[0042]
For example, in the above-described embodiment, an example is shown in which chloroprene rubber latex (CR latex) and acrylonitrile-butadiene rubber latex (NBR latex) are used as the latex, but a coating film may be formed using another latex. . For example, natural rubber latex (NR latex), styrene-butadiene rubber latex (SBR latex), butadiene rubber latex (BR latex), methyl methacrylate-butadiene rubber latex (MBR latex), 2-vinylpyridine-styrene-butadiene rubber latex ( (VP latex), isoprene rubber latex (IR latex), isobutene-isoprene rubber latex (IIR latex) or the like may be used to form a coating film. However, when it is desired to form a coating film having better oil resistance, it is desirable to use either acrylonitrile-butadiene rubber latex (NBR latex) or chloroprene rubber latex (CR latex).
[0043]
Further, in the above-described embodiment, a gel resin material containing a specific substance at a specific compounding ratio is exemplified as a material for forming the base material 3, but other gel resin materials may be used. For example, as the base polymer forming the gel resin material, various thermoplastic elastomers such as styrene, ester, amide, and urethane, and hydrogenated or modified products thereof, or styrene, ABS System, olefin system, vinyl chloride system, acrylic ester system, methacrylic ester system, carbonate system, acetal system, amide system, halogenated polyether system, halogenated olefin system, cellulose system, vinylidene system, vinyl butyral system, vinyl butyral system, alkylene Oxide-based thermoplastic resins and the like and rubber-modified products of these resins can be used. These may be used alone or as a mixture of two or more compatible ones. Also, as for the oil contained in the gel resin material, various softeners for rubber or resin can be used, and any of hydrophilic and hydrophobic materials can be used as long as they are compatible with the base polymer. Any type of softener such as a mineral oil type, a vegetable oil type and a synthetic type may be used. One of these oils may be used alone, or two or more of them may be used in combination as long as they have good compatibility with each other. The mixing ratio of the base polymer and the oil is such that the greater the amount of the oil, the lower the hardness of the gel resin material.
[Brief description of the drawings]
FIG. 1 shows an elastomer member described as an embodiment of the present invention, in which (a) is a perspective view and (b) is a cross-sectional view.
[Explanation of symbols]
1 ... elastomer member, 3 ... substrate, 5 ... coating film.

Claims (6)

An elastomer member formed by coating a surface of a substrate formed of a gel resin material with a coating agent containing latex as a main component, thereby forming a coating film on the surface of the substrate. The elastomer member according to claim 1, wherein the gel-like resin material is obtained by blending 50 to 2000 parts by weight of a hydrocarbon-based process oil as a softening agent with 100 parts by weight of a styrene block copolymer. The latex is natural rubber latex (NR latex), styrene-butadiene rubber latex (SBR latex), butadiene rubber latex (BR latex), methyl methacrylate-butadiene rubber latex (MBR latex), 2-vinylpyridine-styrene-butadiene rubber 3. The elastomer member according to claim 1, which is any one of latex (VP latex), isoprene rubber latex (IR latex), and isobutene-isoprene rubber latex (IIR latex). 3. The elastomer member according to claim 1, wherein the latex is one of acrylonitrile-butadiene rubber latex (NBR latex) and chloroprene rubber latex (CR latex). The elastomer member according to any one of claims 1 to 3, which is a low hardness body having an Asker FP hardness of 0.1 to 90. A method for producing an elastomer member formed by forming a coating film on the surface of the base material by coating the surface of the base material formed of the gel resin material with a coating agent,
The method for producing an elastomer member, wherein the coating agent is a coating agent containing latex as a main component.

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