WO2009122920A1

WO2009122920A1 - Painting member

Info

Publication number: WO2009122920A1
Application number: PCT/JP2009/055386
Authority: WO
Inventors: 吉田由孝; 鈴木和政; 野村賢司; 富橋信行
Original assignee: 株式会社吉田エス・ケイ・テイ
Priority date: 2008-04-01
Filing date: 2009-03-12
Publication date: 2009-10-08
Also published as: JPWO2009122920A1; JP4928632B2

Abstract

Disclosed is a painting member that can significantly improve non-adhesiveness over the non-adhesiveness of conventional non-adhesive surfaces. The painting member comprises a base material, a resin film layer having a smooth surface having an average surface roughness (Ra) of 15.0 μm or less, and rough particles having an average particle diameter (R) of 50.0 μm or more and fixed onto the smooth surface. The painting member can reduce the contact area with an adhesive material and thus can significantly improve non-adhesiveness.

Description

Description book Painted parts Technical field

The present invention relates to a coated member that is most suitable for peeling and non-adhesiveness of adhesive substances in equipment and devices that handle adhesive substances.

Background art

In equipment that handles adhesive substances, how to prevent the adhesion of equipment for adhesive substances is an important issue. As measures against this, methods have been proposed in which silicone oil is applied to the base material surface of equipment, or silicone resin or fluorine resin is coated. Further, for example, Patent Documents 1 and 2 have proposed a method of preventing adhesion of an adhesive substance by attaching irregularities having an average surface roughness of 1 to 30 / z m to the surface of a substrate. Further, in the cited reference 2, when the arithmetic average height of the contour curve of the surface layer exceeds 25 x m, it is described that it is not preferable because the large irregularities cause damage to the adhesive material such as an adhesive tape.

Disclosure of the invention

Problem that invention tries to solve

Although various studies have been made as described above in order to prevent adhesion of the adhesive substance, it is required to further make it non-adhesive. An object of the present invention is to provide a painted member capable of significantly improving the non-adhesiveness over the conventional non-adhesive surface. Means to solve the problem

As a result of intensive studies by the present inventors, it has been found that by combining relatively flat surfaces with protruding particles and emphasizing the protruding particles, it is possible to provide a coated member capable of significantly improving non-adhesiveness.

That is, the coated member of the present invention comprises a substrate, a resin film layer having a smooth surface having an average surface roughness (Ra) of 15.0 m or less formed on the surface of the substrate, and a flat resin film layer. It is characterized in that it has coarse particles fixed to the smooth surface and having an average particle diameter (R) of not less than 50.0 m. By having the resin film layer and the coarse particles as described above, the surface of the coated member becomes a combination of the flat surface and the protruding particles, and the protrusions of the particles are emphasized. As a result, a space is created between the adhesive substance in contact with the painted member and the smooth surface. Furthermore, since the contact of the adhesive substance to the coating member is a projection, the contact area is reduced. Therefore, the adhesion of the adhesive coated member 8 can be reduced, and the adhesive substance can be easily peeled off from the coated member. In addition, since the resin film layer is coated on the base material, even if the coarse particles fall off, the base material will not be exposed and the corrosion resistance is excellent.

By setting the average surface roughness (R a) of the resin coating layer to not more than 15.50 m, the surface of the resin coating layer can be made smooth. By fixing the coarse particles there, the non-stickiness can be further emphasized. Moreover, non-adhesiveness can be emphasized by setting the average particle diameter (R) of the coarse particles to 500 μπι or more.

The average surface roughness (R a) indicates the arithmetic average roughness of J I S B 0 6 0 1: 2 0 0 1. Moreover, an average particle diameter shows an area average diameter.

The coarse particles are preferably fixed to a smooth surface in a single layer. By being fixed so as to be a single layer, the projections of the particles can be further emphasized and the adhesion of the adhesive substance can be reduced.

Furthermore, it is preferable that the occupied area ratio of the coarse particles to the smooth surface is 5 to 9 9%. In order for the protrusions of the particles to be emphasized, both flat and raised surfaces need to be present. If the ratio of the area occupied by the coarse particles to the smooth surface is in the above range, the projections of the particles can be emphasized. If the occupied area ratio (%) is less than 5%, the effect of the projections of the particles is diminished, and if it is more than 99%, the overlapping of the coarse particles is large and the adhesion of the coarse particles to the resin film layer is deteriorated.

In addition, coarse particles are preferably formed from a material whose shape does not change due to melting and sublimation. Even if the resin film layer is exposed to temperature change, the shape of the coarse particles does not change, so the temperature change does not reduce the non-stick effect.

The coarse particles are preferably granulated powder containing 1 to 100% by mass of polytetrafluoroethylene. Functionally and economically preferred is to use coarse particles as the above-mentioned granulated powder. The average particle size (R) of the granulated powder is 50 to 300 μπ 0. When the average particle size of the granulated powder is in the above range, the projections of the particles can be emphasized.

Furthermore, it is preferable to form the said resin film layer with a perfluoro compound. By forming the resin film layer with a perfluoro compound, a smooth surface having an average surface roughness (R a) of not more than 15.0 can be easily obtained.

Effect of the invention

According to the coating member of the present invention, since the relatively flat surface and the protruding particles are combined to emphasize the protruding particles, the contact area of the adhesive substance in contact can be reduced. Also, since the adhesive substance contacts the tip of the projection of the projection particle, the adhesive substance makes shallow contact at the contact periphery. Taking an adhesive tape as an example of an adhesive substance, the adhesive does not get into every corner due to the shallow contact. Therefore, the adhesion is weakened and peeling can be easily performed. Therefore, the stronger the cohesion and the more sticky substance, the stronger the non-sticking effect.

Brief description of the drawings

Fig. 1 shows an explanatory view of the projection height (H).

FIG. 2 shows a surface micrograph (magnification of 50 ×) of Example 2.

FIG. 3 shows a surface micrograph (magnification of 50 ×) of Example 4.

Explanation of sign

1, base material, 2, resin film layer, .3, coarse particle, 4, top resin.

BEST MODE FOR CARRYING OUT THE INVENTION

The coated member of the present invention has a substrate, a resin film layer formed on the surface of the substrate, and coarse particles fixed to the resin film layer.

The resin film layer is coated on the surface of the target substrate.

As the base material, metals such as iron, SUS, aluminum, copper and their alloys and alumina, ceramics such as alumina, zirconia, magnesia, silicon nitride, aluminum nitride, silicon carbide, boron nitride and the like are preferably used. I will not. It is desirable that the surface of these substrates be roughened. The surface roughening can be performed by, for example, chemical treatment, blasting, or a combination of blasting and ceramic thermal spraying.

In addition, it is possible to paint a primer on the roughened surface. Primer By coating one, the adhesion between the substrate and the resin film layer is improved. As a primer, a primer obtained by blending a resin with hexavalent chromic acid, an inorganic primer or an organic primer can be used.

The inorganic primer is a combination of a metal and a resin having a complexing ability such as nickel, titanium, molybdenum and the like.

As the organic primer, epoxy resin, polyamide resin, polyurethane resin, polyamide resin, polyimide resin, polysulfone resin, polyether sulfone, polyether sulfone, polyphenylene sulfide, polyether ether ketone can be used.

These primers can be coated by spray coating or electrostatic powder coating. As a primer used here, a non-chromium primer is preferable in view of environmental problems and the like.

The resin film layer is roughened as described above, and is coated on the primer-coated surface. The material used for the resin film layer preferably has a critical surface tension of 25 NZm or less. Materials used for the resin film layer include polytetrafluoroethylene (PTFE), a copolymer made of one or more of a fusible fluorine resin and a vinyl monomer, and a perfluoro group-containing resin. A non-adhesive resin such as a perfluoro group-containing coupling agent, silicone rubber and silicone resin can be suitably used.

Examples of copolymers made from a meltable fluororesin and one or more of vinyl monomers include ethylene / tetrafluoroethylene copolymer (ETFE), tetrafluoroethylene Z hexafluoropropylene co-polymer Polymer (FEP), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) and copolymer thereof with a small amount of a monomer having a functional group (such as a hydroxyl group or a carboxylic acid group) And those obtained by copolymerizing a small amount of a monomer having a cyclic structure as a comonomer.

The perfluoro group-containing resin may, for example, be a perfluoro group-containing acrylic resin, a perfluoro group-containing polyol, a urethane resin using a polycarboxylic acid or the like, a perfluoro group-containing epoxy resin, or a perfluoro group-containing polyester resin. Stel resin is mentioned.

The perfluoro group-containing coupling agent may, for example, be a silane compound containing a perfluoro group, a zirconium compound containing a perfluoro group, or an aluminate compound containing a perfluoro group.

Particularly, as a material used for the resin film layer, a compound containing fluorine is preferable in terms of contamination, and particularly, a perfluoro compound is preferable. Further, as materials used for the resin film layer, P T F E, F E P and P F A are more preferable.

The resin coating layer has a smooth surface having an average surface roughness (R a) of not more than 15.0 / z m. Also preferably, the average surface roughness (R a) is 5 // m or less, more preferably 2 μπι or less. When the average surface roughness of the smooth surface is in the above range, the projections of the coarse particles are emphasized, which is effective in reducing the contact area with the adhesive substance. Moreover, the thickness of the resin film layer is :! -300 / m is preferable.

The resin coating layer may also contain a high hardness filler to improve the abrasion resistance. As the high hardness filler, glass fiber, carbon fiber, silicon carbide fiber, alumina fiber, boron fiber, titanium oxide whisker force, silicon carbide whisker, silicon nitride whisker, glass flake, glass bead, silicon carbide powder, graphite powder Can be mentioned. Further, the resin film layer may contain graphite, conductive carbon, titanium oxide force deposited with a conductive agent, titanium oxide, or the like for the purpose of imparting conductivity.

The coarse particles are fixed to the smooth surface. The coarse particles are preferably substances which do not change in shape due to melting, sublimation and the like. That is, a material which does not change the projections of the coarse particles depending on the processing temperature is preferred. The shape of the coarse particles may be various shapes such as triangles, squares, and polygons, but spheres are preferable because they can minimize the surface area.

The mean particle size (R 2) of the coarse particles is at least 50 // m. The average particle diameter (R) of the coarse particles is preferably 50 to 300 m, more preferably 100 to 100 / m. By using coarse particles having such an average particle diameter, it is possible to partially form a projection surface having large irregularities on a smooth surface.

Examples of the coarse particles include non-adhesive particles such as non-adhesive treated glass beads, non-adhesive treated ceramic beads, silicone powder, and non-molten fluorocarbon resin powder. Above all, the construction of polytetrafluoroethylene, which is a kind of non-molten fluorocarbon resin powder. Granular powder can be preferably used.

Granulated powder of polytetrafluoroethylene is used in automatic molding, extrusion molding, etc., JP-B-43-86-11, JP-B-44-22619, JP-B-47-3187. It is a powder for molding as described in JP-A-3-259926 and the like. The granulated powder of polytetrafluoroethylene contains 1 to 100% by weight, preferably 20 to 100% by weight, and more preferably 50 to 100% by weight of polytetrafluoroethylene. The granulated powder may also contain a filler to prevent creep or to improve abrasion resistance and thermal conductivity.

It is preferable to control the occupied area ratio of such coarse particles to the smooth surface to 5 to 99%. The occupied area ratio is more preferably 10 to 70%, further preferably 15 to 50%. If the occupied area ratio is less than 5%, the effect of coarse particles is diminished. If the occupied area ratio is greater than 99%, the overlap of coarse particles increases and the adhesion of the coarse particles to the smooth surface becomes worse. The method of fixing the coarse particles to the smooth surface is not particularly limited. For example, coarse particles are attached to a flat surface by static electricity or spraying, and then the material used for the resin film layer is coated with a thickness of 1Z100 to 15 of the coarse particles, and heat baking is performed to smooth the coarse particles. It can be fixed on the surface. The thickness of the material used for fixing is thin and adhesion of the coarse particles to the smooth surface is weak, and if it is thick, the emphasis of the coarse particle projections is weakened and the non-sticking effect is reduced.

The coarse particles are preferably fixed in a single layer on the smooth surface. In order to fix in a single layer, coarse particles may be electrostatically or spray-coated on a smooth surface.

Example

Hereinafter, the present invention will be described in more detail by way of examples.

(Example 1)

The surface was roughened by blast degreasing a 300 O 0 mm x 10 0 mm x 1 mm base material of SUS 302 at 380 ° C for 30 minutes, and using # 240, a pressure of 0.5 MP a.

A roughened surface was coated with 12 μι of polyflon enamel (EK 1 909 S 21 L) manufactured by DAIKIN INDUSTRIES CO., LTD. Containing about 25 wt% of the primer PTFE as a primer and dried. After drying, Daikin Industries' polyflon containing about 40 wt% of PTF soot Apply enamel (EK3709 S 21 L) to a film thickness of 20 μm and dry without drying. 340 ° CX 5 hours of baking of polytetrafluoroethylene granulated powder (M-39 1 S) manufactured by Daikin Industries, Ltd. The classified product (particle size 106 to 250 // m) of the product was uniformly dispersed by an electrostatic powder coating machine. From the sprayed top, polyflon enamel (EK 3709 S 21 L) manufactured by Daikin Industries, Ltd. was applied to a thickness of 20 μm, dried, and fired at 380 ° CX for 20 minutes. This is referred to as Example 1.

The resulting coated plate was enlarged at a magnification of 50 times with a digital microscope VH-Z 75 type manufactured by Keyence Corporation, and the particle size of 10 particles was measured to calculate the area average particle size. In the case of Example 1, it was 220 m.

(Example 2)

Example 2 was carried out in the same manner as Example 1 except that the spread amount of polytetrafluoroethylene granulated powder manufactured by Daikin Industries, Ltd. was reduced to decrease the occupied area ratio. (Example 3)

Coating a roughened surface with polyflon enamel (EK1909 S 2 1 L) manufactured by Daikin Industries Co., Ltd. at 10 μι, and using 340 μF of polytetrafluorinated ethylene granulated powder (Μ 39 1 S) manufactured by Daikin Industries, Ltd. Example 5 Example 3 was obtained in the same manner as in Example 1 except that a classified product (particle size of 250 to 355 μπι) of the sintered product was used. The resulting coated plate was enlarged at a magnification of 50 times with a digital microscope VH-Ζ 75 type manufactured by Keyence Corporation, and the particle diameter of 10 particles was measured to calculate the area average particle diameter. In the case of Example 3, it was 290 m.

(Example 4)

Example 4 was carried out in the same manner as Example 3 except that the spread amount of the polytetrafluoroethylene powder produced by Daikin Industries, Ltd. was reduced to decrease the occupied area ratio. (Example 5)

Coating a roughened surface with polyflon enamel (EK 1 909 S 2 1 L) manufactured by Daikin Industries, Ltd. for 15 m and using polytetrafluorinated ethylene granulated powder manufactured by Daikin Industries (M- 39 1 S) Example 5 was carried out in the same manner as Example 1 except that the classified product (particle diameter 35 5 μπι to 500 μι) of the 340 ° CX for 5 hours was used. The resulting coated plate was enlarged at a magnification of 50 times with a digital microscope VH-Z 75 type manufactured by Keyence Corporation, and the particle size of 10 particles was measured to calculate the area average particle size. In the case of Example 5, it was 350 / im.

(Example 6)

Example 6 was carried out in the same manner as Example 5, except that the spread amount of polytetrafluoroethylene granulated powder manufactured by Daikin Industries, Ltd. was reduced to decrease the occupied area ratio. (Example 7)

The surface was roughened by carrying out dry degreasing at 300 ° C. for 30 minutes at 60 ° C. and pressure of 0.5 MP a for 10 minutes.

DuPont's primer 420-703 was coated on the roughened surface by 1 5 μπι and dried. After drying, PFA powder coating MP-102 manufactured by Mitsui Dupont Fluorochemicals Co., Ltd. containing 10% by weight of PFA was coated, and baked at 400 ° C. for 20 minutes to form a smooth surface with a film thickness of 50 // m 2.

In the same manner as in Example 1, dispersed product (particle diameter 106 to 250 / _im) of sintered product of 340 ° CX for 5 hours of polytetrafluoroethylene granulated powder (M-39 1 S) manufactured by Daikin Industries, Ltd. Then, 20 parts of EM- 50 OCL manufactured by Mitsui Dupont Fluorochemical Co., Ltd. containing 35% by weight of PFA was applied from above, dried, and baked at 380 ° C. for 20 minutes. This is taken as Example 7.

(Example 8)

? A powder coating material MP- 102 made by Mitsui DuPont Fluorochemicals, containing 10 wt.% Of O. 8, is coated again and baked for 20 minutes at 400 ° C. to form a smooth surface with a thickness of 100 μm, And the same classified product (particle diameter 250 to 355 π ι) of 340 ° CX for 5 hours sintered product of polytetrafluoroethylene (M-391 S) manufactured by Daikin Industries, Ltd. similar to that of Example 3 The procedure of Example 7 was repeated except for the above, to obtain Example 8.

(Example 9)

? DuPont Fluorochemicals Co., Ltd. PFΑ Powder Coating Material MP-102 containing 100 wt% of water is overcoated and baked at 400 for 20 minutes to a film thickness of 300 μm. A smooth surface, and a graded product (particle diameter 35 5) of sintered product of polytetrafluoroethylene (M-391S) manufactured by Daikin Industries, Ltd. and having the same composition as in Example 5 at 34 0 ° CX for 5 hours. Example 9 was obtained in the same manner as Example 7 except that μπ! to 500 μι was used.

(Example 1 0)

The surface roughened in the same manner as in Example 7 was coated with 15 μm of DuPont primer 420-703 and dried. After drying, Neoflon powder coating NCX-1 manufactured by Daikin Industries, Ltd. containing l O O w t% was baked at 34 ° C. for 3 ° to form a smooth surface with a thickness of 30 μm. Similar to Example 7, classified product of polytetrafluoroethylene powder powder (M-391S) manufactured by Daikin Industries, Ltd. at a temperature of 40 ° CX for 5 hours (particle diameter 10 6 to 2 The product is sprayed with 50 / xm) and coated with FEP containing 5 5 wt% of FEP Neoflon FEP ND-1 made by Daikin Industries, Ltd. and coated with 2 0 μπι and dried after drying at 320 ° C I baked it for a minute. This is assumed to be Example 10.

(Example 1 1)

Daikin Neofen powder powder NCX-1 containing 100% by weight of FEP was overcoated, and baked for 20 minutes at 34 to obtain a smooth surface with a thickness of 80 / m, and Example Daikin Industries, Ltd. polytetrafluoroethylene granulated powder similar to 5

(M-3 9 1 S) in the same manner as in Example 10 except that the classified product (particle size 35 5 μm to 5 0 0 μ π ι) of sintered product at 3 4 0 ° CX for 5 hours was used Conducted to obtain Example 1 1.

(Example 1 2)

Blanking degreasing was performed for 30 minutes at 320 ° C. for 30 minutes at 300 ° C., and blasting was carried out using a pressure of 0.5 MPa, and further Nippon Gotec Co., Ltd. 80 to 100 m of Ni 1 A 1 alloy was deposited by a thermal spraying apparatus manufactured by Co., Ltd. This surface was coated with 12 m of a polyflon enamel (EK 1 909 S 2 1 L) manufactured by Daikin Industries, Ltd. containing about 25 wt% of a primer PTF E and dried. After drying, polyflonamide (EK 3 709 S 2 1 L) manufactured by Daikin Industries Co., Ltd. containing about 40 wt% of PTFE is applied to a film thickness of 25 m, without drying. Made of polytetrafluoroethylene granulated powder (M-391S)

Electrostatic powder coating machine with classified product (particle size 2 50-35 5 μ π ι) of sintered product of 3 40 ° CX for 5 hours Spread evenly. From the sprayed top, Polyflon enamel (EK 3709 S 21 L) manufactured by Daikin Industries, Ltd. was applied to a thickness equivalent to 20 μμ thickness, dried, and fired at 380 ° CX for 20 minutes. This is referred to as Example 12.

(Example 1 3)

Same as Example 12 except that classified product (particle diameter 355 to 500 x m) of sintered product of 340 ° CX for 5 hours of polytetrafluoroethylene granulated powder (M-39 1 S) manufactured by Daikin Industries, Ltd. was used. To obtain Example 13.

(Example 14)

The surface is roughened in the same manner as in Example 1 and coated with DuPont's primer 420-703 at 15 μ 、, and in the non-dried state, 340 ° CX 5 of polytetrafluoroethylene granulated powder (807-Ν) by Mitsui Dupont Fluorochemicals. The classified product (particle size 500 to 850 / m) of the time-sintered product is dispersed uniformly with an electrostatic powder coating machine, and from there, 100 wt% of P is manufactured by Mitsui Dupont Fluorochemicals PFA powder paint M P_ 102 was coated to a film thickness of 20 μπι and baked at 380 ° C. for 30 minutes. This is taken as Example 14.

(Example 15)

Apply 5 μm of a silicone coating agent PR X-306 manufactured by Toray Industries, Inc. to the roughened surface in the same manner as in Example 1 and dry without drying. A classified product (particle size 500 to 850 μπι) of a sintered product of ethylene granulated powder (807-Ν) for 3 hours at 34 ° C. for 5 hours was dropped onto the surface, and powder not adhering was removed. On top of this, silicone coating agent PR X-306 manufactured by Toray Dow Co., Ltd. was repeatedly applied, and drying was repeated to obtain a film thickness of 40 μπ 焼成, and baking was performed at 180 ° C. for 30 minutes. This is referred to as Example 15.

(Comparative example 1)

Comparative Example 1 was obtained in the same manner as Example 1 except that polytetrafluoroethylene granulated powder (M-39 1 S) manufactured by Daikin Industries, Ltd. was not used.

That is, P TFE, a primer, was applied to the roughened surface as in Example 1.

Daikin Industries' polyflon enamel containing 25 wt% (EK 1 909 S 21

L) was coated and dried 12 m. After drying, it contains about 40 wt% of PTFE. Polyflon enamel (EK 3709 S 2 1 L) manufactured by Ikin Industries Co., Ltd. was applied to a thickness of 30 μm, dried, and fired at 380 ° CX for 20 minutes. This is Comparative Example 1. (Comparative example 2)

Comparative Example 2 was obtained in the same manner as Example 7 except that polytetrafluoroethylene granulated powder (M-391 S) manufactured by Daikin Industries, Ltd. was not used.

That is, on the surface roughened in the same manner as in Example 7, 15 to 1 / m of DuPont's primer 420 1 703 was applied and dried. After drying, PFA powder coating MP-102 manufactured by Mitsui Dupont Fluorochemical Co., Ltd. containing 10% by weight of PFA was coated, and baked at 400 ° C. for 20 minutes to form a smooth surface with a film thickness of 45 / m. This is Comparative Example 2.

(Comparative example 3)

Comparative Example 3 was obtained in the same manner as Example 10 except that polytetrafluoroethylene powder (M-39 1 S) manufactured by Daikin Industries, Ltd. was not used.

That is, on the surface roughened as in Example 10, DuPont's primer 420-703 was applied for 15 μm and dried. After drying, it was baked at 340 ° C. for 30 minutes using a powder powder coating N C X-1 manufactured by Dickin Co., Ltd. containing 10% by weight of FEP, to obtain a smooth surface with a film thickness of 25 μπι. This is Comparative Example 3.

(Comparative example 4)

Use of Daikin Industries 'PF powder powder AC-5820 (average particle diameter 220 μm) as coarse particles instead of Daikin Industries' Polytetrafluorethylene Granule Powder (1-39 1 S) Comparative Example 4 was obtained in the same manner as in Example 7 except that firing was carried out at 380 ° C. for 20 minutes. In Comparative Example 4, the coarse particles were meltable with P 2 F A, so when observed on the surface, the particle shape was broken.

(Comparative example 5)

Comparative Example 5 was obtained in the same manner as in Example 5 except that the amount of the polytetrafluoroethylene granulated powder (M-391 S) manufactured by Daikin Industries, Ltd. was increased and the layers were dispersed in a similar manner to Example 5. The average surface roughness (Ra; S) of the smooth surfaces of the above Examples 1 to 13 and Comparative Examples 1 to 5 was measured.

The average surface roughness (R a; S) of the smooth surface was measured using a flat surface having no projected surface, with a surface roughness profile measuring machine HANDY- SURF E- 35 A manufactured by Tokyo Precision Instruments Co., Ltd. In addition, each film thickness was measured by using a dual scope MROR manufactured by Fisshjörnsch GmbH.

In addition, the height (H) of coarse particle projections was calculated by the calculation to represent the degree of projections formed by coarse particles. The protrusion height (H) was determined as an average particle diameter-overlap resin film thickness. Fig. 1 shows an explanatory view of the projection height (H), which will be described using this. As shown in FIG. 1, a resin film layer 2 is formed on a substrate 1. The coarse particles 3 are dispersed in the resin film layer 2, and the top coating resin 4 fixes the coarse particles 3. Here, the height of the coarse particles 3 from the surface of the top resin 4 is referred to as a protrusion height H.

In addition, the ratio of R a was determined from the average surface roughness (R a; S) of the smooth surface and the height of protrusion (H). Ra ratio = HZ (Ra; S).

Further, the surface of each of the examples and comparative examples was observed at a magnification of 100 with a digital microscope VH-Z 75 type manufactured by Keyence Corporation. The average particle size and number per unit area were determined from the observation image, and the occupied area ratio (%) was calculated using this.

The adhesion of the coarse particles was measured by the following method.

The number of (non-adhesive) coarse particles attached to the gum tape was measured after peeling 10 times at 25 mm width with a gum tape (adhesive force 7.75 N / cm) manufactured by Rinlay Tape Co., Ltd. It was judged. '

:: 0 pieces, :::! ~ 2 pieces, Δ: 3 to 4 pieces, X: 5 pieces or more.

Moreover, the non-adhesiveness of the coating member was evaluated as follows.

The gum tape (adhesive force: 7.75 N / cm) manufactured by Rinlay Tape Co., Ltd. is used to affix to the coated surface of each example and comparative example, and the speed 1 OmmZ is measured using an AG-X tensile tester manufactured by Shimadzu Corporation A peel stress (N, cm) of 90 ° was measured for 10 minutes. Each result is shown in Table 1.

As can be seen from Table 1, comparing Examples 1 to 6 using coarse particles with a particle diameter of 106 / in or more using PTFE for the smooth surface, and Comparative Example 1 using no coarse particles, Examples 1 to 6 were able to reduce the non-adhesiveness to 1/3 or less.

In addition, Example 1 and Example 2 have different occupied area ratios. The non-tacky property was better in Example 2 where the occupied area ratio (%) was lower than Example 1. Similarly, Example 4 was more non-tacky than Example 3, and Example 6 was more non-tacky than Example 5. Moreover, when Example 2, Example 4, and Example 6 are compared, the non-adhesiveness of Example 6 with a large particle diameter of coarse particles and a large Ra ratio was excellent. In addition, Example 6 was able to reduce non-adhesiveness to 1 Z 10 as compared with Comparative Example 1.

As can be seen from the results of Examples 1 to 6 and Comparative Example 1, the projections are emphasized, that is, the ratio of the average surface roughness (R a) of the smooth surface to the height (H) of coarse particles. The larger the ratio, the better the non-stickiness. As shown in Table 1, the occupied area ratio (%) showed better non-stickiness at 15 to 50%.

In addition, in Comparative Example 5 in which the amount of coarse particles dispersed was larger than that in Example 5 described above, coarse particles were stacked in 2 to 3 layers, as compared to Example 5 that was stacked in a single layer. Therefore, all the coarse particles were not fixed to the resin coating layer, and the adhesion of the coarse particles to the resin coating layer was poor. Example 5 was able to reduce non-adhesiveness to 1/2 compared to Comparative Example 5.

Similarly, Examples 7 to 9 using PFA in the resin film layer and using coarse particles having an average particle diameter of 106 m or more and Comparative Example 2 not using coarse particles are compared with Examples 7 to 7. 9 was able to reduce the non-stickiness to almost 1/5. In particular, in Example 9 in which the particle diameter of the coarse particles is large and the R a ratio is large, the non-adhesiveness can be reduced to about 10 as compared with Comparative Example 2. Even when PFA is used for the resin film layer, the projections are emphasized, that is, the larger the ratio of Ra, which is the ratio of the average surface roughness (R a) of the smooth surface to the height of protrusions of coarse particles (H), Non-tacky was excellent.

Further, when the above Example 7 and Comparative Example 4 in which PFA, which is a fusible resin, was used for coarse particles, were compared, the non-adhesiveness could be reduced to about 1%. In Comparative Example 4, it was observed that the particle shape was broken. It was found that when the particle shape is broken, the non-adhesiveness is inferior. Also, when comparing the example 10-1 1 using the FEP in the resin coating layer and using the coarse particles having an average particle diameter of 106 / m or more with the comparative example 3 not using the coarse particles, the example 1 0 1 to 11 could reduce the non-stickiness to almost 1 Z 4 or less. In particular, in Example 11 in which the particle diameter of the coarse particles is large and the Ra ratio is large, the non-adhesiveness can be reduced to about 1 Z 10 as compared with Comparative Example 3.

Even when FEP is used for the resin film layer, the projections are emphasized, that is, the larger the ratio of Ra, which is the ratio of the average surface roughness (R a) of the smooth surface to the height of projections of coarse particles (H), Non-tacky was excellent.

Example 1 2 and Example 1 3 were roughened more than Examples 1 to 6 by spraying N i -A 1 alloy on the surface of the base material. Therefore, the average surface roughness (R a) of the smooth surface is 10 times larger than that of Examples 1 to 6. In the cases of Example 1 2 and Example 1 3 as well, the non-adhesiveness was significantly superior to Comparative Example 1. Therefore, it was found that the combination of a smooth surface having an average surface roughness (R a) of 150 m or less and a coarse particle having an average particle diameter of 50 p π or more is effective for non-stickiness.

In Example 14 and Example 15, coarse particles having an average particle diameter of 500 μm or more were used. Both Examples 1 to 4 and Example 1 5 had a large Ra ratio, and the result was excellent in non-adhesiveness.

In Example 15, a silicone rubber was used for the resin film layer. Silicone rubber usually does not adhere well to polytetrafluoroethylene. Furthermore, in Example 15, the occupied area ratio of coarse particles was as large as 89% and the amount of coarse particles was large. Therefore, in Example 15, adhesion failure between the coarse particle polytetrafluoroethylene granulation powder and the resin coating layer is expected. However, Example 15 resulted in having good adhesion between the resin film layer and the coarse particles.

The results are considered as follows. Granulated powders are disclosed in the above-mentioned patents (Japanese Patent Publication No. 4 3-861, Japanese Patent Publication No. 4 4 2 2 6 1 9, Japanese Patent Publication No. 4 7- 3 8 7, Japanese Patent Application Laid-Open No. 3-2. As described in the publication No. 5 9 9 2 6), the particles are formed by aggregation of particles of about 1 to 100 μm, and a large number of voids are present inside the granulated powder. Therefore, it is considered that because the silicone rubber entered into the void portion, it had a good adhesion.

As described above, even when silicone was used for the resin film layer, the coarse particles were able to adhere well to the resin film layer, resulting in excellent non-adhesiveness. The superiority of silicone It is considered that the non-adhesiveness and the above-mentioned adhesiveness can be well achieved.

From the above experimental results, it was found that when the Ra ratio is 10 or more, the non-adhesiveness is effective.

FIG. 2 shows a 50 × magnified photomicrograph of Example 4 in Example 2 and FIG. The objects that appear granular in FIGS. 2 and 3 are coarse particles. It can be seen from FIGS. 2 and 3 that coarse particles are uniformly dispersed on the smooth surface.

Industrial applicability

The coated member of the present invention can be suitably applied to an adhesive tape production facility, an adhesive production facility, a rubbery material handling facility, and a food adhesive material handling facility. Specifically, it can be applied to various applications such as containers using adhesives and adhesives, stirrers, rolls, heating parts, cutting blades and parts for cutting, transport piping, extrusion nozzles, etc.

Claims

The scope of the claims

1. With a substrate

A resin film layer having a smooth surface having an average surface roughness (Ra) of 1 5. O / zm or less formed on the surface of the substrate;

Coarse particles having an average particle diameter (R) of 50 0. ΠΙ or more fixed to the smooth surface of the resin film layer,

A painted member characterized by having.

2. The coated member according to claim 1, wherein the coarse particles are fixed to the smooth surface in a single layer.

3. The coated member according to claim 1 or 2, wherein an occupied area ratio of the coarse particles to the smooth surface is 5 to 99%.

4. The coated member according to any one of claims 1 to 3, wherein the coarse particles are formed of a material whose shape does not change by melting or sublimation.

5. The coarse particles are 1 to 100% by weight of polytetrafluoroethylene. / ₀ containing coating member according to any one of claims 1 to 4 is a granulated powder powder.

6. The coated member according to claim 5, wherein an average particle size (R) of the granulated powder is 50 to 3000 μm.

7. The coated member according to any one of claims 1 to 6, wherein the resin film layer is formed of a perfluorinated compound.