JPH01317763A - Sheet material having abrasion-resistant and non-sticking sliding surface - Google Patents

Abstract

PURPOSE:To enhance abrasion resistance and non-stickiness by forming a sliding surface layer consisting of a fluorocarbon resin, an inorg. powder and a binder to the surface of a base material. CONSTITUTION:A sheet material having abrasion resistance and non-sticking sliding surface is obtained by forming a sliding surface layer consisting of a fluorocarbon resin 2, an inorg. powder 4 and a binder 3 to the surface of a base material. The fluorocarbon resin 2 being one component of the sliding surface layer 1 especially imparts sliding capacity and polytetrafluoroethylene is used. The inorg. powder 4 is dispersed in the sliding surface layer to impart abrasion resistance to the sliding surface layer and an alumina powder is used. The base material forms an integrated structure along with the sliding surface layer formed thereto and, for example, a fabric using a glass or carbon fiber is used. For example, the sliding surface layer 1 is prepared in a pasty state to be applied to the surface of the base material and cured at room temp. or under heating to constitute the sliding surface sheet material integrally formed along with the base material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an abrasion-resistant and non-adhesive smooth sheet material that is applied to the surface of an adherend to impart sliding performance to the surface.

[Conventional technology]

Conventionally, as this type of smooth sheet material, one in which a tape-shaped sealing material is attached to a rail of a threshold to impart slipping properties is known.

[Problem to be solved by the invention]

However, the above-mentioned conventional smooth sheet materials have low abrasion resistance, and their uses are limited.

Therefore, the technical object of the present invention is to significantly improve wear resistance while maintaining sliding performance, and also to improve non-adhesiveness, thereby expanding the range of applications.

(Means for Solving the Problems) In order to solve the above technical problems, the present invention forms a smooth layer made of a fluororesin, an inorganic powder, and a binder on the surface of a base material, thereby improving not only sliding performance but also wear resistance. The means is a wear-resistant and non-adhesive smooth sheet material that is simultaneously imparted with non-adhesive properties.

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

Inorganic powders are dispersed in the smooth surface layer to impart wear resistance to the smooth surface layer, and include ceramic powders such as aluminum, zirconium, silicon carbide, and silicon nitride, and various metal
Powders (pure metal powders and alloy powders) are used. Note that the particle size of the inorganic powder is preferably about 20 tiles.

Further, the binder is used to provide bonding properties between the fluororesin and the inorganic powder and to provide flexibility to the smooth layer, and both organic binders and inorganic binders are used. As the organic binder, for example, thermosetting epoxy resin, phenol resin, polyester, acrylic resin, polyamideimide, polyimide, polyurethane, etc., and thermoplastic polyethylene, polypropylene, etc. are used. Further, as the inorganic binder, metals, ceramics, etc. are used.

Furthermore, the base material has the above-mentioned smooth layer formed on its surface to form an integral structure. Therefore, in addition to adhesion with the smooth surface layer, a certain degree of strength is also required, and for example, textiles using glass fibers or carbon fibers, various nonwoven fabrics, resin sheets, and metal foils are used.

The above-mentioned smooth surface layer can have a structure as shown in FIGS. 1 to 4 of the accompanying drawings depending on its manufacturing method. FIG. 1 shows a structure in which the fluororesin 2 is unevenly distributed near the surface of the smooth layer l. FIG. 2 shows a structure in which fluororesin 2 and inorganic powder 4 are uniformly dispersed in binder 3. In FIG. 3, inorganic powder 4 is dispersed, and fluororesin 2 is continuously bonded to form a network structure. Fourth
The figure shows a structure in which the fluororesin 2 completely envelops the inorganic powder 4.

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

5 to 9 show the cross-sectional structure of the smooth sheet material 5 constructed as described above. For example, -
As shown in FIG. 5, there is a general structure in which a smooth layer 1 is integrally fixed to the surface of a base material 6, and the back surface of the base material 6 is attached to an adherend 9 via an adhesive 8. , a structure in which smooth layers 1a and 1b are provided on both sides of the base material 6 as shown in FIG. 6, a structure in which slits 10 are provided in the smooth layer 1 as shown in FIG. Select one depending on the application, such as a structure in which fluororesin particles 7 are embedded inside the smooth layer 1 as shown in the figure, or a structure in which the smooth layer 1 with a circular cross section is continuous as shown in Fig. 9. can be done.

The smooth layer 1 has the structure shown in FIGS. 1 to 4 described above.

[Example 1] Powdered polytetrafluoroethylene, alumina powder, and low-melting glass were mixed in a weight ratio of 9:4, and made into a paste using an organic solvent containing toluene as the main component. It was molded into a spherical shape with a diameter of about 1.3 mm. Next, this molded product was dried in a rotary dryer at a rotation speed of 11000C 110 rpm to 40 rpm, and then baked at 370°C for 3 minutes.

Then, this fired product was embedded in a vinyl chloride film having a thickness of 0.5 mm to obtain a film with a smooth layer formed thereon.

Next, the sliding properties of this film were investigated, and as a comparative example, the sliding properties of vinyl chloride, which does not form a smooth layer, were also investigated. The results are shown in Table-1.

The test method was as follows: base area 900 cm, weight 100 kg.
Each film was attached to the bottom of an iron weight, and the coefficient of dynamic friction was measured by moving it on concrete at a speed of 50 cm/min.

Table 1 As a result of the measurements, it was found that the film with the smooth layer exhibited excellent sliding properties even under high loads.

[Example 2] Powdered polytetrafluoroethylene, alumina powder, and polyphenylene sulfone powder were mixed in a weight ratio of 7:5:9, and dispersed in water to which a surfactant was added to form a slurry coating material. get. After applying this on a glass cloth and drying it for 20 minutes at 100°C,
C. for 15 minutes to obtain a composite fabric.

Next, this composite fabric was applied to the inner surface of a steel hopper, and its wear resistance properties were examined. A similar test was also conducted on 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 pebbles of 5 mm to 10 mm as the abrasive material, slid the pebbles onto 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.

Table 2 As a result of the measurements, the abrasion thickness of the composite cloth was more than 25 times less, the abrasion resistance was excellent, and the impact noise was also reduced.

[Example 3] Zirconium with an average particle size of 10 JLm and a polyether sulfon solution were mixed and prepared at a solid content weight ratio of 9=1, made into a paste, and applied onto a mixed cloth of carbon fiber and glass fiber. After drying at 100'C, 260
Calcined at ℃. Next, polytetrafluoroethylene enamel (EK-4300CRN, manufactured by Daikin Industries, Ltd.) was applied on top of this to give a weight of 10 kg/0m2 per unit area.
The polytetrafluoroethylene particles are embedded inside by applying a nitrogen gas pressure of 200° C., and then fired at 370° C. to fix the polytetrafluoroethylene particles inside.

Next, this cloth-like fired body was heated to 330 mm using a hemispherical mold.
After heating and press molding at ℃ to make a hemispherical cloth-like fired body,
The sliding characteristics were investigated using a metal ball.

For comparison, a metallic hemispherical receiver coated with lubricating grease or coated with fluororesin was also investigated. The results are shown in Table-3.

The test method was to place a metal sphere (SUS304) with a diameter of 30 mm on a hemispherical receiver with a maximum diameter of 31 mm, and apply a load of I
The test was carried out by rotating at a speed of 45 m/min by applying a load of 1 kg.

Table 3 [Example 4] Polytetrafluoroethylene powder and alumina powder are mixed at a weight ratio of 1=1, dispersed in an organic solvent containing methanol as the main component, and then applied onto a cotton-nylon fabric. . Next, in a semi-dry state, an epoxy resin is applied to the back side of the above-mentioned coated surface and cured at 100°C to obtain a composite fabric.

The friction and wear characteristics of this composite fabric were investigated.

Compared to the wear characteristics when only fluororesin is applied,
The results are shown in Table 4. The test method was to use a thrust type abrasion tester at a rotational speed of 30 m/min, a load of 5 kg, and a mating material of metal (SUS 304).
), was used.

Table 4 The composite fabric according to the example has better friction and especially abrasion properties than the comparative example, and if an adhesive is applied to the back side of the composite fabric, it can be used against plastics without hardening the coating at high temperatures. High lubricity and abrasion resistance can be imparted at the same time by simply adhering it to the surface of an adherend such as wood.

FIG. 10 shows an example in which the smooth sheet material obtained in the above-mentioned example (Example 4) is adhered to the back surface of the ski 11. In this case, the smooth sheet material is formed as a smooth tape 5a having a width approximately equal to the width of the ski 11, and is attached 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. Glue to.

Therefore, when such a sliding surface tape 5a is attached to the ski board 11, the low friction properties of the fluororesin ensure good skiing at all times regardless of weather, temperature, snow quality, etc. Since it contains inorganic powder, it has good durability and does not need to be replaced frequently. Moreover, since it has flexibility, peeling phenomenon does not occur following bending deformation, torsional deformation, etc. of the ski 11.

The above-mentioned smooth sheet material is not only used as a ski sheet, but can be used in a wide variety of fields as long as it can be adhered to objects that require sliding performance, such as threshold rails and furniture. It can also be applied to the feet of people, or to the inside of hoppers.

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

Conventional formwork for concrete is generally of the type in which a release agent is applied to the inner surface of the formwork, but after demolding, concrete is often found adhering to the formwork, making it difficult to reuse the formwork. It was necessary to remove the adhering concrete. In this example, it was investigated whether a smooth sheet material could solve such problems.

As a method of implementation, spherical alumina (average particle size 2 g, 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 aluminum foil.

Next, a rubber-based resin adhesive was applied to the back side of the aluminum foil, and it was attached to the inner surface of a concrete form, concrete was poured, and the mold releasability was examined.

The smooth sheet of the above example has excellent non-adhesive properties, so it can easily rub against concrete. As a result, when reusing the mold, there is no need to clean the mold as in the past. Furthermore, since the smooth sheet has excellent abrasion resistance, it was prevented from being abraded by concrete aggregates, etc., and could withstand repeated use about 5 to 10 times.

(Effects) As explained above, according to the abrasion-resistant and non-adhesive smooth sheet material of the present invention, it is possible to impart sliding performance to an adherend by a simple means of adhering it, and also It also has the durability to maintain its properties over a long period of time, so it works effectively on adherends that require both slipperiness and abrasion resistance, such as skis. It turns out.

Furthermore, the smooth sheet material of the present invention can now be widely used in fields where conventional sheet materials could not be applied due to their lack of wear resistance, such as release sheets for concrete formwork.

[Brief explanation of the drawing]

FIGS. 1 to 4 are diagrams showing the smoothing layer, FIGS. 5 to 9 are diagrams showing various cross-sectional structures of the sliding sheet material, and FIG. It is a perspective view in the case of adhering face sheet material. 1...Smooth layer 2...Fluororesin 3...Binder 4...Inorganic powder 5...Smooth sheet material 6...Base material 7...Fluororesin particles Patent applicant Tokyo Silicone Co., Ltd. Applicant
Sumitomo Cement Co., Ltd. No. 1 Fig. 1..., row f14 2---Fun beak t:mm 3...l mainter' 4--...Kuruiso powder vermilion 5th flash Fig. 8

Claims (1)

[Claims] A wear-resistant and non-adhesive smooth sheet material having a smooth layer made of a fluororesin, an inorganic powder, and a binder formed on the surface of a base material.