JP2764583B2 - Wear-resistant and non-adhesive smooth sheet material - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an abrasion-resistant and non-adhesive smooth surface sheet material that is attached to a surface of an adherend and imparts a sliding performance to the surface.

[Conventional technology]

Conventionally, as this kind of smooth surface sheet material, for example, a material in which a tape-shaped sealing material is attached to a rail of a sill to impart a sliding property is known.

[Problems to be solved by the invention]

However, the above-mentioned conventional smooth surface sheet material has low wear resistance, and its use has been limited.

Therefore, a technical problem of the present invention is that the wear resistance is remarkably improved while maintaining the sliding performance, and at the same time, the adhesiveness is also improved, thereby expanding the applications.

[Means for solving the problem]

The present invention, in order to solve the above technical problems, on the surface of the substrate, a fluororesin that imparts slipperiness, an inorganic powder that imparts abrasion resistance, and bonding the fluororesin and the inorganic powder An abrasion-resistant and non-adhesive smooth surface sheet material having a smooth surface layer made of an organic binder excluding the fluororesin which imparts flexibility is formed. The amount of the inorganic powder is at least 30% by weight based on the total amount of the fluororesin and the inorganic powder. Further, the organic binder other than the fluororesin is made of at least one of thermosetting epoxy resin, phenol resin, polyester, acrylic resin, polyamideimide, polyimide or polyurethane, or thermoplastic polyethylene or polypropylene. It is characterized by.

The fluororesin, which is one component of the above-mentioned smooth surface layer, imparts particularly sliding performance, and polytetrafluoroethylene, polychlorotrifluoroethylene, or the like is used.

The inorganic powder is dispersed in the smooth surface layer to impart abrasion resistance to the smooth surface layer, and alumina, zirconium,
Ceramic powders such as silicon carbide and silicon nitride and various metal powders (pure metal powders and alloy powders) are used. The particle size of the inorganic powder is preferably about 20 μ.

Further, the binder is for imparting a bonding property between the fluororesin and the inorganic powder and for giving flexibility to the smooth surface layer. Both an organic binder and an inorganic binder are used. As the organic binder, for example, a thermosetting epoxy resin, a phenol resin, a polyester, an acrylic resin, a polyamideimide, a polyimide, a polyurethane, a thermoplastic polyethylene, a polypropylene, or the like is used. In addition, as inorganic binders, metals,
Ceramics and the like are used.

Furthermore, the base material forms the integral structure by forming the smooth surface layer on the surface. Therefore, in addition to the need for adhesion to the smooth surface layer, a certain level of strength is also required. For example, woven fabrics using glass fibers or carbon fibers, various nonwoven fabrics, resin sheets, and metal foils are used.

The smooth surface layer can have a structure as shown in FIGS. 1 to 4 of the accompanying drawings depending on the manufacturing method.
FIG. 1 shows a structure in which the fluororesin 2 is unevenly distributed near the surface of the smooth surface layer 1. FIG. 2 shows that the binder 3 has a fluororesin 2
And the inorganic powder 4 are uniformly dispersed. FIG. 3 shows a structure in which the inorganic powder 4 is dispersed and the fluororesins 2 are continuously bonded to each other to form a network structure. FIG. 4 shows a structure in which the fluororesin 2 wraps the entire inorganic powder 4.

The smooth surface layer 1 having such a structure constitutes a smooth sheet material integrally formed with the base material by being prepared, for example, in a paste form, applied to the upper surface of the base material, and cured at room temperature or by heating. I do.

5 to 9 show the cross-sectional structure of the smooth surface sheet member 5 configured as described above.
As shown in FIG. 5, other than the general structure in which the smooth surface layer 1 is integrally fixed to the surface of the base material 6 and the back surface of the base material 6 is adhered to the adherend 9 via the adhesive 8. 6, the structure in which the smooth surface layers 1a and 1b are provided on both surfaces of the base material 6 as shown in FIG. 6, the structure in which the slit 10 is provided in the smooth surface layer 1 as shown in FIG. As shown in the figure, a structure in which the fluororesin particles 7 are embedded in the smooth surface layer 1 or a structure in which the smooth surface layer 1 having a circular cross section is continuous as shown in FIG. Can be done. The smooth surface layer 1 can have the structure shown in FIGS. 1 to 4 described above.

Example 1 Powdered polytetrafluoroethylene, alumina powder, and low-melting glass were mixed at a weight ratio of 9: 4: 7, and were made into a paste with an organic solvent containing toluene as a main component. Into a spherical shape with a diameter of about 1.3 mm. Then, in a rotary dryer, this molded product,
After drying at 100 ° C and a rotation speed of 10 rpm to 40 rpm, 3
Baking was performed at 70 ° C. for 3 minutes. And this fired product is 0.5m thick
A film in which a smooth surface layer was formed by embedding in a vinyl chloride film of m was obtained.

Next, the sliding characteristics of this film were examined, and as a comparative example, the sliding characteristics of vinyl chloride having no smooth surface layer were examined. Table 1 shows the results. The test method was such that each film was attached to the bottom of an iron weight having a bottom area of 900 cm ² and a weight of 100 kg, and was moved on concrete at a speed of 50 cm / min to measure a dynamic friction coefficient.

As a result of the measurement, it was found that the film having the smooth surface layer exhibited excellent sliding characteristics even under a high load.

Example 2 Powdered polytetrafluoroethylene, alumina powder and polyphenylene sulfone powder were mixed in a weight ratio of 7: 5: 9, respectively, and dispersed in water to which a surfactant was added to form a slurry-like coating material. Get. This was applied on a glass cloth, dried at 100 ° C. for 20 minutes, and baked at 380 ° C. for 15 minutes to obtain a composite cloth.

Next, this composite cloth was attached to the inner surface of an iron hopper, and the wear resistance was examined. The same test was performed for an iron hopper to which no composite cloth was attached, and the results of both tests are shown in Table 2. The test method used a pebble of 5 mm to 10 mm as a grinding material, slid the pebble on the inner surface of the hopper at a speed of about 2 m / sec, and measured the wear thickness of the inner surface of the hopper after continuous operation for 10 hours.

As a result of the measurement, the person who stuck the composite cloth has a wear thickness of 25 times or more, is excellent in abrasion resistance, and also reduces impact noise.

Example 3 A solution of zirconium having an average particle diameter of 10 μm and a polyethersulfone solution were mixed and prepared at a solid content ratio of 9: 1, made into a paste, and coated on a mixed cloth of carbon fiber and glass fiber. After drying at ℃, it was fired at 260 ℃.
Next, an enamel of polytetrafluoroethylene (EK-4300CRN, manufactured by Daikin Industries, Ltd.) was applied thereon, and a nitrogen gas pressure of 10 kg / cm ² per unit area was applied to introduce polytetrafluoroethylene particles inside. Buried, then 370 ℃
To fix the polytetrafluoroethylene particles inside. Then, the cloth-like fired body was heated and pressed at 330 ° C. using a hemispherical mold to obtain a hemispherical cloth-like fired body, and the sliding characteristics were examined using metal balls. For comparison, a case where a lubricating grease was applied to a metallic hemispherical receiver or a case where a fluororesin coating was applied was also examined. The results are shown in Table-3.

The test method is for a hemispherical receiver with a maximum diameter of 31 mm.
It is made by rotating a metal sphere (SUS304) having a diameter of 30 mm at a speed of about 45 m / min under a load of 1 kg.

Example 4 Polytetrafluoroethylene powder and alumina powder were mixed at a weight ratio of 1: 1 and dispersed in an organic solvent containing methanol as a main component, and then applied onto a cotton-nylon woven fabric. Next, an epoxy resin is applied to the back side of the application surface in a semi-dry state, and cured at 100 ° C. to obtain a composite cloth.

The friction and wear characteristics of this composite fabric were examined. The results are shown in Table 4 in comparison with the wear characteristics when only the fluororesin was applied. The test was performed using a thrust-type abrasion tester at a rotation speed of 30 m / min, a load of 5 kg, and a metal (SUS304) as the mating material.

The composite cloth according to the example has friction and
Excellent abrasion characteristics, especially if the adhesive is applied to the back of the composite cloth, it only adheres to the surface of the adherend such as plastic or wood without hardening the coating film at high temperature. Property can be simultaneously provided.

FIG. 10 shows an embodiment in which the smooth surface sheet material obtained by the above embodiment (embodiment 4) is bonded to the back surface of the ski 11. In this case, the smooth sheet material is formed as a smooth surface tape 5a having substantially the same width as the ski width of the ski 11,
It adheres to the back surface of the ski 11 via an adhesive layer 8 such as epoxy provided on the back surface of the base material 6.

Accordingly, when such a smooth surface tape 5a is attached to the ski 11, good sliding is always ensured without being restricted by weather, temperature, snow quality, etc. due to the low friction characteristics of the fluororesin, Since the inorganic powder is mixed, the durability is good and there is no need to frequently replace the powder. In addition, since the ski 11 has flexibility, the peeling phenomenon does not occur following the bending deformation or torsional deformation of the ski 11.

It should be noted that the above-mentioned smooth surface sheet material is not only used as a ski seat, but can be widely used in various fields as long as it can be adhered to an adherend requiring slip performance, such as a sill rail and furniture. It can also be applied to the foot of a person or the inside of a hopper.

Example 5 This example is an example in which the above-mentioned smooth surface sheet is used as a mold release agent for a concrete formwork.

Conventional concrete formwork is generally a type in which a mold release material is applied to the inner surface of the formwork.However, concrete often adheres to the formwork after demolding, and when the formwork is reused, It was necessary to remove the adhered concrete. In the present embodiment, it was investigated that the smooth surface sheet material can solve such a problem.

As an implementation method, spherical alumina (average particle size 2 μm)
m), polytetrafluoroethylene powder and polyethylene are mixed in a weight ratio of 10: 5: 3, dispersed in an organic solvent containing methanol as a main component, and applied to an aluminum foil.

Next, a rubber-based resin adhesive was applied to the back surface of the aluminum foil, adhered to the inner surface of a concrete formwork, and concrete was poured to examine the releasability.

The smooth surface sheet of the above-described embodiment is excellent in non-adhesiveness, and thus is easily separated from concrete. As a result, there is no need to clean the formwork as before, when reusing. Also,
The smooth surface sheet was also excellent in abrasion resistance, so that it was prevented from being worn by concrete aggregates and the like, and could withstand repeated use about 5 to 10 times.

〔effect〕

As described above, according to the abrasion-resistant and non-adhesive smooth sheet material according to the present invention, slip performance can be imparted by a simple means of simply adhering to an adherend, and excluding fluororesin. The combination of a fluororesin and an inorganic powder with a base material by an organic binder provides both slipperiness and abrasion resistance, so that sliding performance can be maintained for a long time and durability can be improved. In addition to rails, feet of furniture, etc., the present invention can be used for heavy loads such as skis or hoppers, which require both slipperiness and wear resistance.

Further, the smooth surface sheet material of the present invention can be widely used in fields where conventional sheet materials cannot be applied due to lack of abrasion resistance, for example, release sheets for concrete formwork.

When the amount of the inorganic powder is 30% by weight or more based on the total amount of the fluororesin and the inorganic powder, the wear resistance can be effectively improved.

Further, the organic binder excluding the fluororesin is made of at least one of thermosetting epoxy resin, phenol resin, polyester, acrylic resin, polyamideimide, polyimide or polyurethane, or thermoplastic polyethylene or polypropylene. Accordingly, the fluororesin, the inorganic powder, and these and the substrate can be effectively bonded, and the smooth surface layer can be provided with flexibility.

[Brief description of the drawings]

1 to 4 show a sliding surface layer, FIGS. 5 to 9 show various sectional structures of a sliding sheet material, and FIG. 10 shows a sliding surface according to the present invention on the back surface of a ski. It is a perspective view at the time of bonding a face sheet material. DESCRIPTION OF SYMBOLS 1 ... Smooth surface layer 2 ... Fluororesin 3 ... Binder 4 ... Inorganic powder 5 ... Smooth sheet material 6 ... Substrate 7 ... Fluororesin particles

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // (C10M 111/04 107: 38 107: 04 103: 06 103: 04) C10N 20:06 30:06 40:00 50: 08

Claims (3)

(57) [Claims] 1. A fluororesin that imparts slipperiness, an inorganic powder that imparts abrasion resistance, and a fluororesin that imparts flexibility while combining the fluororesin and the inorganic powder on the surface of a substrate. An abrasion-resistant and non-adhesive smooth surface sheet material formed with a smooth surface layer comprising an organic binder excluding the above. 2. The abrasion-resistant and non-adhesive smooth surface sheet according to claim 1, wherein the amount of the inorganic powder is at least 30% by weight based on the total amount of the fluororesin and the inorganic powder. Wood. 3. The organic binder excluding the fluororesin,
2. Abrasion resistance according to claim 1, comprising at least one of thermosetting epoxy resin, phenolic resin, polyester, acrylic resin, polyamideimide, polyimide or polyurethane, or thermoplastic polyethylene or polypropylene. And non-adhesive smooth sheet material.