JP7333160B2 - Highly slidable resin molding - Google Patents

Description

TECHNICAL FIELD The present invention relates to a slidable resin molded article having excellent slidability.

Conventionally, in order to improve the slidability of a resin molded body, the resin molded body has been made to contain a bleeding additive or a layer made of an inorganic coating film or vapor deposition film has been provided on the surface of the molded body.
However, in the technique of incorporating a bleeding additive into the resin molded body, the use is limited because the surface of the resin molded body is sticky.
In addition, in the method of providing a layer of inorganic coating film or vapor deposition film on the surface of the resin molded body, the layer of inorganic coating film or vapor deposition film cracks or peels off when the resin molded body is deformed. Therefore, it is not suitable for applications that make use of the fact that the molded product is made of a deformable elastomer.

From a thermoplastic resin composition containing an elastomer-reinforced aromatic vinyl resin comprising an elastomer portion and a resin portion containing structural units derived from an aromatic vinyl compound) and a thermoplastic elastomer on the surface of the substrate layer However, since the skin layer is formed by coating, the skin layer itself requires a certain thickness, and the laminate as a whole is (Patent Document 1).

In medical materials, etc., various resin films, moldings such as gaskets for syringes, and base materials such as silicone tubes are known to have a polyparaxylylene film laminated on their surfaces. The only purpose is to improve biocompatibility with the coating, and furthermore, there is a problem that the polyparaxylylene coating has poor adhesion to the substrate and is easily peeled off, and sufficient adhesion to withstand use is not obtained. Hateful. (Patent document 2)

JP 2017-109312 Japanese Patent Publication No. 2001-522652

The present invention has excellent surface slidability, maintains surface slidability even when it is greatly stretched or deformed, and even when washed with water, does not feel sticky, has good lubricity, and is comfortable to the touch. An object of the present invention is to provide a slidable resin molding.

As a result of various studies, the inventors of the present invention have found that a resin molded article having a structure in which a sliding layer made of a parylene-based compound polymer vapor-deposited film is laminated on the outermost surface of the resin molded article can solve the above problems. This is what I discovered.

The present invention is characterized by the following points.
1. A slidable resin molded body having a resin molded part and a sliding layer,
The resin molded part is one or more selected from the group consisting of butyl-based elastomers, silicone-based elastomers, polyethylene-based resins, styrene-based elastomers, nitrile-based elastomers, chloroprene-based elastomers, acrylic-based elastomers, and urethane-based elastomers. contains
The sliding layer is made of a deposited polymer film of a paraxylylene-based compound, and is the outermost surface of the slidable resin molding,
The thickness of the sliding layer is 50 nm or more and 2 μm or less.
Sliding resin molding.

（式中、Ｒは水素原子またはフッ素原子であり、Ｘはハロゲン原子であり、ｎは平均値が０～４の数である。）
３．前記パラキシリレン系化合物が下記式で表される化合物を含む、上記１に記載の摺動性樹脂成形体。

４．前記パラキシリレン系化合物が下記式で表される化合物を含む、上記１に記載の摺動性樹脂成形体。

５．前記重合体蒸着膜が、下記の工程Ａ～Ｃを含む方法によって作製されたものである、上記１～４の何れかに記載の摺動性樹脂成形体。
工程Ａ）前記パラキシリレン系化合物を気化室内に導入し、１００～１６０℃で気化する工程、
工程Ｂ）気化した前記パラキシリレン系化合物を、熱分解室内で、６００～６９０℃でラジカル化する工程、
工程Ｃ）５～１５μｂａｒに減圧された蒸着室内に、ラジカル化した前記パラキシリレン系化合物を１０～４００μｂａｒで導入し、前記蒸着室内に別途導入された積層体前駆体の表面に、前記パラキシリレン系化合物を蒸着させると共に重合させて、前記重合体蒸着膜を形成する工程。
６．上記１～５の何れかに記載の摺動性樹脂成形体から作製された、文字入力用キーボード。
７．上記１～５の何れかに記載の摺動性樹脂成形体から作製された、マウスパッド。 2. 2. The slidable resin molded article according to 1 above, wherein the para-xylylene compound contains a compound represented by the following formula.

(Wherein, R is a hydrogen atom or a fluorine atom, X is a halogen atom, and n is a number with an average value of 0 to 4.)
3. 2. The slidable resin molded article according to 1 above, wherein the para-xylylene compound contains a compound represented by the following formula.

4. 2. The slidable resin molded article according to 1 above, wherein the para-xylylene compound contains a compound represented by the following formula.

5. 5. The slidable resin molding according to any one of 1 to 4 above, wherein the deposited polymer film is produced by a method including the following steps A to C.
Step A) A step of introducing the para-xylylene compound into a vaporization chamber and vaporizing it at 100 to 160°C.
Step B) a step of radicalizing the vaporized para-xylylene compound at 600 to 690° C. in a pyrolysis chamber;
Step C) The radicalized para-xylylene-based compound is introduced at 10-400 μbar into a vapor deposition chamber evacuated to 5-15 μbar, and the para-xylylene-based compound is applied to the surface of the laminate precursor separately introduced into the vapor deposition chamber. depositing and polymerizing to form the deposited polymer film;
6. 6. A character input keyboard produced from the slidable resin molding according to any one of 1 to 5 above.
7. 6. A mouse pad made from the slidable resin molding according to any one of 1 to 5 above.

According to the present invention, even if the resin molded article originally has low slidability, a resin molded article having high slidability can be obtained by the sliding layer provided on the surface of the molded article.
In particular, even if the resin molded product has a surface that tends to be sticky or has poor lubricity, the sticky feeling is eliminated, and a resin molded product with good lubricity, good touch, and high slidability can be obtained. .
Since the sliding layer in the present invention is thin and has excellent stretchability, it does not impair the elasticity and stretchability of the resin molded product, and the sliding layer itself does not peel off or crack. Even if it does, it is possible to maintain high slidability.
Furthermore, the slidable resin molded article of the present invention can be washed with water because the sliding layer has water resistance.

1 is a simplified cross-sectional view showing an example of a slidable resin molded article of the present invention; FIG. FIG. 4 is a simplified cross-sectional view showing an example of another embodiment of the slidable resin molded article of the present invention; It is a figure which shows the jig|tool (sliding piece) for measuring a static friction coefficient and a dynamic friction coefficient. It is a figure which shows the fixing method of a surface treatment base film to the jig (sliding piece) for measuring a static friction coefficient and a dynamic friction coefficient. FIG. 1 shows a measuring device for measuring static and dynamic coefficients of friction;

In each drawing, the sizes and proportions of members may be changed or exaggerated for the sake of clarity. In addition, for the sake of clarity, parts that are not necessary for explanation and symbols that are repeated may be omitted.
Furthermore, in each drawing, the uneven portion is illustrated as a pattern having clear corners, but it may be a shape with rounded corners.

In FIG. 1, the slidable resin molded article has a structure in which a sliding layer is provided on the surface of a resin molded part.
In FIG. 2, the elastomer molded part has unevenness, and the sliding layer is laminated in a shape along the unevenness of the elastomer molded part.

The present invention is described in detail below.
The present invention will be described below with reference to the drawings. However, the present invention is not limited to these specifically exemplified forms and various specifically described structures.

The slidable resin molded article of the present invention has a resin molded part and a sliding layer.
The resin molded part contains one or more selected from the group consisting of butyl-based elastomers, silicone-based elastomers, and polyethylene-based resins.
The sliding layer is the outermost surface of the slidable resin molding, and is composed of a deposited polymer film of a paraxylylene-based compound.

<Resin molded parts>
The resin molded part in the slidable resin molded article of the present invention is selected from the group consisting of butyl elastomers, silicone elastomers, polyethylene resins, styrene elastomers, nitrile elastomers, chloroprene elastomers, acrylic elastomers, and urethane elastomers. It contains one or more selected types.

The resin-molded part may be a single resin-molded article, an assembly of two or more resin-molded articles, or may include parts other than resin-molded articles.
For example, the resin molded part can include electronic parts, circuit parts, pattern layers, etc. inside or on the surface of the molded part, and can also be an input device provided with electrical contacts and the like.

Here, the resin molded product is preferably a butyl-based elastomer raw material, a silicone-based elastomer raw material, a polyethylene-based resin raw material, a styrene-based elastomer raw material, a nitrile-based elastomer raw material, a chloroprene-based elastomer raw material, an acrylic elastomer raw material, or a urethane-based elastomer raw material. It is produced from a resin composition containing one or more selected from the group consisting of elastomer raw materials and fluoroelastomer raw materials.

Here, the term "elastomer" refers to a resin that exhibits the behavior of rubber, and for example, exhibits a high elastic limit and a low elastic modulus, and includes three-dimensionally crosslinked rubber and non-three-dimensionally crosslinked thermoplastic It includes elastomers.
Each resin and elastomer also includes copolymers, hydrogenated products and vulcanized products.

A butyl-based elastomer is an elastomer mainly using isobutylene as a polymerization raw material, and also includes a copolymer in which other polymerization raw materials are used in combination. Specific examples include copolymers with a small amount of isoprene and vulcanized copolymers with isoprene, but are not limited to these.
A silicone-based elastomer is an elastomer having a siloxane bond in its main skeleton and a large number of organic groups and functional groups on silicon atoms.

A polyethylene-based resin is a resin mainly using ethylene as a polymerization raw material, and also includes a copolymer in which other polymerization raw materials are used in combination. Specifically, low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer, ethylene- methyl (meth)acrylate copolymer, ethylene-ethyl (meth)acrylate copolymer, ethylene-(meth)acrylic acid copolymer, ethylene-propylene copolymer and the like, and mixtures of these resins. , but not limited to.

Styrenic elastomers are block copolymer elastomers and hydrogenated products of block copolymers using styrene and other polymerization raw materials in combination, and are generally elastomers called SBC (Styrenic Block Copolymer).
Nitrile-based elastomers are copolymers of acrylonitrile and 1,3-butadiene, and also include copolymers in which other polymerization raw materials are used in combination.
A chloroprene-based elastomer is an elastomer mainly using chloroprene as a polymerization raw material, and also includes a copolymer in which other polymerization raw materials are used in combination.
An acrylic elastomer is an elastomer mainly using a (meth)acrylic acid ester as a polymerization raw material, and also includes a copolymer in which other polymerization raw materials are used in combination. Specific examples include a copolymer (ACM) of (meth)acrylic acid ester and 2-chloroethyl vinyl ether, a copolymer (ANM) of (meth)acrylic acid ester and acrylonitrile, and the like. is not limited.
A urethane-based elastomer is an elastomer having a urethane bond (--NHCOO--) in its main skeleton.

The resin composition in the present invention contains the above resin raw materials and elastomer raw materials, and furthermore, organic fillers and inorganic fillers that are usually blended in the resin composition according to the application of the slidable resin molded article. agents, radical polymerization initiators, vulcanizing agents, vulcanization activators, release agents, anti-aging agents, and other various additives.
The resin composition in the present invention can be molded by a known molding method such as injection molding, compression molding, transfer molding, etc., and can be subjected to post-curing treatment or the like as necessary.

<Sliding layer>
In the present invention, high slidability means good lubricity without stickiness.
In the present invention, the sliding layer is a layer composed of a deposited polymer film of a paraxylylene-based compound, which is provided on the outermost surface of a slidable resin molded article, and is a layer that imparts slidability to the resin molded article. be.

The thickness of the sliding layer is preferably 50 nm or more and 2 μm or less, more preferably 65 nm or more and 500 nm or less.
When the thickness is within the above range, the sliding layer can be firmly adhered to the resin-molded part and exhibit sufficient slidability.
If it is thinner than the above range, the sliding effect is difficult to be exhibited, and if it is thicker than the above range, the sliding layer itself becomes hard and difficult to handle, and the production cost increases because it takes a long time to form the sliding layer. .

The sliding layer in the present invention has excellent stretchability, and even when the resin molded part is deformed by stretching or bending, it follows the stretching or bending and deforms without peeling or cracking. It is possible to maintain the high slidability of the molded body.

[Formation of sliding layer]
The sliding layer is a layer made of a polymer vapor-deposited film of a paraxylylene-based compound.
A polymer deposition film of a paraxylylene-based compound can be formed, for example, by a method including the following steps A to C.
Step A) A step of introducing the paraxylylene-based compound into a vaporization chamber and vaporizing it at 100 to 160°C.
Step B) A step of radicalizing the vaporized para-xylylene compound at 600 to 690° C. in a pyrolysis chamber.
Step C) The para-xylylene-based compound, which has been radicalized, is introduced at 10-400 μbar into the vapor deposition chamber evacuated to 5-15 μbar, and the para-xylylene-based compound is applied to the surface of the laminate precursor separately introduced into the vapor deposition chamber. is vapor-deposited and polymerized to form the polymer vapor-deposited film.

A para-xylylene-based compound polymer deposition film is formed by first vaporizing a para-xylylene-based compound, then radicalizing it, and bringing it into contact with a resin molded part.

In step A, an appropriate amount of paraxylylene-based compound is vaporized according to the volumes of the vaporization chamber and deposition chamber. If the amount of the paraxylylene-based compound is too small, the atmospheric pressure in the vapor deposition chamber becomes low, the density of the radical monomer becomes low, and the formation speed of the vapor deposition film becomes slow, which is not preferable.
If the amount of the paraxylylene-based compound is too large, the density of the radical monomer becomes too high, and polymerization tends to proceed before it reaches the surface of the resin-molded part, and the quality of the vapor-deposited film formed deteriorates. It is not preferable because the adhesion between the film and the deposited film is lowered.
The temperature at which the paraxylylene compound is vaporized in the vaporization chamber is preferably 100 to 160°C. If the temperature is lower than 100°C, vaporization tends to be insufficient. If the temperature is higher than 160°C, the vaporized para-xylylene compound tends to become chemically unstable and easily carbonized.

In step B, the temperature at which the vaporized para-xylylene compound is radicalized in the pyrolysis chamber is preferably 600 to 690°C. If the temperature is lower than 600°C, radicalization tends to be insufficient. If the temperature is higher than 690° C., the vaporized para-xylylene compound tends to be carbonized, and the radicalized para-xylylene compound tends to become chemically unstable.

In the step C, the pressure in the vapor deposition chamber before introducing the radicalized paraxylylene compound is preferably kept in the range of 5 to 15 μbar in order to obtain a good quality and highly adhesive vapor deposition film.
If the air pressure is lower than 5 μbar, the density of the radical monomers will be low, which will slow down the vapor deposition film formation rate and lower the production efficiency. When the pressure is higher than 15 μbar, the density of the radical monomer becomes too high, and polymerization tends to proceed before reaching the surface of the resin molded part, and the quality of the vapor deposition film formed deteriorates. This is not preferable because the adhesion with the film is lowered.

The air pressure of the radicalized paraxylylene compound when introduced into the vapor deposition chamber is preferably 10 to 400 μbar. If it is lower than 10 μbar, the density of the radical monomer becomes small, the formation speed of the deposited film becomes slow, and the production efficiency decreases. When the air pressure is higher than 400 μbar, the density of the radical monomer becomes too high, and polymerization tends to proceed before reaching the surface of the resin molded part, and the quality of the deposited film to be formed deteriorates, and the precursor of the laminate is deteriorated. This is not preferable because the adhesion between the body and the deposited film is lowered.
Here, resin molded parts can be processed in batches.

It is preferable to wash the surface of the resin molded part to be vapor-deposited with a solvent before the vapor-deposited polymer film of the paraxylylene-based compound is formed thereon so as to improve adhesion to the vapor-deposited polymer film.
As the solvent used for cleaning, a general-purpose solvent that does not dissolve, swell, or deteriorate the resin molded part can be selected. Specific solvents include IPA (isopropyl alcohol), ethyl acetate, toluene, acetone, MEK (methyl ethyl ketone) and the like, and washing can be performed with a solvent containing one or more of these, but is limited to these. not.
After cleaning with a solvent, the resin molded part can be further surface-treated with plasma. As a result, additives and contaminants on the surface are further removed, polarity is imparted, appropriate surface roughness is obtained, and adhesion to the polymer deposition film can be improved.

Furthermore, after the above plasma treatment, the surface of the resin molded part may be treated with a silane compound having a carbon-carbon double bond-containing functional group and a silanol group.
Plastic molded parts are surface-treated with plasma to remove surface additives and contamination, impart polarity, obtain appropriate surface roughness, and improve adhesion with polymer vapor deposition films. can be made
Specific examples of surface treatment using plasma include reactive ion etching and direct plasma plasma treatment. The treatment conditions are preferably an argon gas or oxygen gas atmosphere of 1 to 100 Pa, a plasma output of 10 to 500 W, and a treatment time of 5 to 500 seconds.

If the air pressure is lower than 1 Pa, the molded resin part is likely to deteriorate, and if it is higher than 100 Pa, it is difficult to obtain the effect of improving adhesion to the vapor deposition film, which is not preferable. On the other hand, if the plasma output is less than 10 W, it is difficult to obtain the effect of improving the adhesion to the deposited film. Furthermore, when the treatment time is less than 5 seconds, it is difficult to obtain the effect of improving the adhesion to the deposited film, and when it is longer than 500 seconds, the molded resin parts tend to deteriorate, which is not preferable.

After the above plasma treatment, the surface of the resin molded part may be treated with a silane compound having a carbon-carbon double bond-containing functional group and a silanol group. By this treatment, the resin molded part can obtain a stronger adhesiveness to the deposited polymer film of the paraxylylene compound.
The OH groups generated on the surface of the resin-molded part due to the plasma treatment and the OH of the silane compound undergo dehydration condensation to bond the resin-molded part and the silane compound, and furthermore, the carbon-carbon double bond of the silane compound. The radicals of the paraxylylene-based compound react with each other to bond the silane compound and the deposited polymer film, and as a result, the deposited polymer film firmly adheres to the resin molded part.

Specific examples of such silane compounds include γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris(2-methoxyethoxy)silane, vinylmethyl Hydrolysates such as dimethoxysilane can be mentioned. Hydrolysis converts methoxy and ethoxy groups to silanol groups.
In addition, during the plasma treatment, silane treatment, and step C, if the resin molded parts are not exposed to the outside air and are continuously treated in the apparatus, recontamination of the resin molded parts can be prevented. can obtain a stronger adhesion to the polymer deposited film.

<Para-xylylene compound>
In the present invention, the para-xylylene compound used for forming the sliding layer is preferably a para-xylylene compound represented by the following formulas (1), (2) and (3). These para-xylylene compounds can be used singly or as a mixture of two or more.
Commercially available paraxylylene compounds include unsubstituted paraxylylene dimer (Parylene N, manufactured by SCS Co., Ltd.), monochloroparaxylylene dimer (Parylene C, manufactured by SCS Co., Ltd.), dichloroparaxylylene dimer (SCS Co., Ltd., Parylene D), tetrafluoroparaxylylene dimer (SCS Co., Ltd., Parylene FVT4), α,α,α',α'-tetrafluoroparaxylylene dimer (SCS Co., Ltd., Parylene AF4) and the like.

（式中、Ｒは水素原子またはフッ素原子であり、Ｘはハロゲン原子であり、ｎは平均値が０～４の数である。）

These para-xylylene-based compounds are polymerized to produce a para-xylylene-based polymer called parylene.

(Wherein, R is a hydrogen atom or a fluorine atom, X is a halogen atom, and n is a number with an average value of 0 to 4.)

<Uses of slidable resin moldings>
Applications of the slidable resin molded article of the present invention include molded articles using butyl-based elastomers, silicone-based elastomers, polyethylene-based resins, styrene-based elastomers, nitrile-based elastomers, chloroprene-based elastomers, acrylic-based elastomers, and urethane-based elastomers. is used, and is particularly suitable for portable equipment, equipment, and equipment that can be folded and stored.
Specifically, keyboards for character input, mouse pads, etc. for personal computers and tablets can be mentioned.

Each raw material used in the examples is as follows.
Paraxylylene compound 1: Parylene C manufactured by SCS Corporation. A monochloro-para-xylylene dimer. Powdered.
Paraxylylene compound 2: Parylene N manufactured by SCS Corporation. Unsubstituted para-xylylene dimer. Powdered.
A butyl-based elastomer 1, a silicone-based elastomer 1, and a polyethylene-based resin 1 were prepared, and each was used to mold a wristwatch band and a sheet (100 mm×100 mm×300 μm).

[Example 1]
The surfaces of the wristwatch band and the sheet of Silicone Elastomer 1 were washed with IPA to remove surface stains and the like.
The static friction coefficient and the dynamic friction coefficient were measured using the washed sheet, and the obtained wristwatch band was used to evaluate the tactile sensation.
Then, the washed wristwatch band and the sheet were placed and fixed in a vacuum vapor deposition chamber (height: 260 mm, φ: 250 mm, pressure in the vapor deposition chamber: 50 μbar).
2 g of paraxylylene compound 1 was introduced into the vaporization chamber, heated at 160° C. and vaporized, and then the vaporized paraxylylene compound 1 was introduced into the thermal decomposition chamber and heated at 660° C. to radicalize.

Further, the radicals were introduced into the vapor deposition chamber at 40 μbar, collided with the wrist watch band and the sheet in the vapor deposition chamber, polymerized and deposited to form a sliding layer consisting of a 1 μm thick polymer vapor deposition film. , a watch band having a sliding layer on the outermost surface and a vapor-deposited sheet were obtained.
Static friction coefficient and dynamic friction coefficient were measured using the vapor-deposited sheet, and touch feeling was evaluated using the vapor-deposited watch band. Further, the wristwatch band was bent 100 times and washed with water, and then the presence or absence of abnormality in the deposited film was evaluated.

[Examples 2 and 3]
A sheet and a wristwatch band were produced using each raw material according to the description in Table 1, operated in the same manner as in Example 1 to form a sliding layer on the outermost surface, and evaluated in the same manner. Various conditions and evaluation results are shown in Table 1.

[Comparative Examples 1 and 2]
A sheet and a wristwatch band were produced using each raw material according to the description in Table 1, and evaluated in the same manner as in Example 1 without forming a sliding layer. The results are listed in Table 1.

<Evaluation>
[Thickness of sliding layer]
The thickness of the sliding layer on the surface of the obtained resin molding was measured using a film thickness meter, Optical NanoGauge C10178-02, manufactured by Hamamatsu Photonics.
[Sliding]
Based on JIS K 7125, the static friction coefficient and the dynamic friction coefficient of the resin molding with respect to mirror-finished stainless steel were measured.

As shown in FIGS. 3 and 4, the SUS friction coefficient measuring jig (11) for the sliding piece is placed on the surface without the sliding layer of the test piece sheet (12), and the edge of the test piece sheet (12) is placed upward. Then, the sheet was fixed with double-sided tape on the upper part of the jig (11). Then, the jig (11) to which the test piece sheet (12) is attached is placed on a specular stainless steel plate (23) fixed to the test table (21), and a weight is placed on the jig (11). (13) is placed.

Then, as shown in FIG. 5, the jig (11) to which the test piece sheet (12) is attached is pulled at a constant speed using the movable and force gauge section (22) of the friction measuring machine (20). , the change in load was recorded, and the static and dynamic friction coefficients were calculated. The measurement was individually performed 5 times, and the average value was obtained. A case where both the static friction coefficient and the dynamic friction coefficient were less than 0.20 was regarded as acceptable. Detailed conditions are as follows.
Friction measuring machine: Friction measuring machine TR-2 manufactured by Toyo Seiki Seisakusho Co., Ltd.
Weight: 1000gf
Pulling speed: 50mm/min

[Feeling of touch]
A wristwatch band was worn on the wrist, and a sensory test was conducted on the feeling of touch. It was judged to be good if it had no sticky feeling and had slipperiness. The following criteria were used in the table.
Good: ○
Normal: △
Bad: ×

[Summary of evaluation results]
The sheets of Examples 1 to 3 had 5 sliding layers made of vapor-deposited polymer films of paraxylylene compounds.
By being within the range of 0 nm to 2 μm, the static friction coefficient and dynamic friction coefficient are greatly reduced, exhibiting high slidability, and the wristwatch-type band has a greatly improved touch feeling, and the sliding layer even after folding and washing with water. No abnormalities were observed.
However, Comparative Example 1, which has a sliding layer of less than 50 nm, exhibits insufficient static friction coefficient, dynamic friction coefficient, and hand feeling, and Comparative Example 2, which has a sliding layer thicker than 2 μm, exhibits a decrease in flexibility of the band when folded and washed with water. (Hardening) was felt, and the sliding layer turned white after folding and washing with water.

1. Sliding resin molding2. Resin molded parts3. sliding layer 11 . SUS friction coefficient measuring jig for sliding piece 12 . Specimen sheet 13 . Weight 20 . Friction measuring machine 21 . test stand 22 . Movable and force gauge section 23 . mirror stainless steel plate

Claims (7)

A slidable resin molded body having a resin molded part and a sliding layer,
The resin molded part is one or more selected from the group consisting of butyl-based elastomers, silicone-based elastomers, polyethylene-based resins, styrene-based elastomers, nitrile-based elastomers, chloroprene-based elastomers, acrylic-based elastomers, and urethane-based elastomers. contains
The resin molded part is subjected to plasma treatment under an argon gas or oxygen gas atmosphere of 1 to 100 Pa at a pressure of 1 to 100 Pa with a plasma output of 10 to 500 W for a treatment time of 5 to 500 seconds by a reactive ion etching method or a direct plasma method. carbon-carbon selected from hydrolysates of roxypropyltrimethoxysilane, gamma-methacryloxypropyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris(2-methoxyethoxy)silane, vinylmethyldimethoxysilane The surface is treated with a silane compound having a double bond-containing functional group and a silanol group,
The sliding layer is made of a deposited polymer film of a paraxylylene-based compound, and is the outermost surface of the slidable resin molding,
The thickness of the sliding layer is 65 nm or more and 1000 nm or less.
Sliding resin molding. 2. The slidable resin molded article according to claim 1, wherein said para-xylylene compound contains a compound represented by the following formula.

(Wherein, R is a hydrogen atom or a fluorine atom, X is a halogen atom, and n is a number with an average value of 0 to 4.) 2. The slidable resin molded article according to claim 1, wherein said para-xylylene compound contains a compound represented by the following formula.

2. The slidable resin molded article according to claim 1, wherein said para-xylylene compound contains a compound represented by the following formula.

A method for producing a polymer deposited film of the slidable resin molding according to claim 1, comprising the following steps A to C.
Step A) A step of introducing the para-xylylene compound into the vaporization chamber and vaporizing it at 100 to 160°C.
Step B) a step of radicalizing the vaporized para-xylylene compound at 600 to 690° C. in a pyrolysis chamber;
Step C) The radicalized para-xylylene-based compound is introduced at 10-400 μbar into the vapor deposition chamber evacuated to 5-15 μbar, and the para-xylylene-based compound is applied to the surface of the laminate precursor separately introduced into the vapor deposition chamber. depositing and polymerizing to form the deposited polymer film; A character input keyboard made from the slidable resin molding according to any one of claims 1 to 4. A mouse pad made from the slidable resin molding according to any one of claims 1 to 4.

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