JPH0640534A - Sheet material - Google Patents

Abstract

PURPOSE:To provide a sheet material fitted to a slide contact portion such as a conveyance road surface where a conveyed object is conveyed in the slide contact state, having an excellent low-friction characteristic, and capable of being used when shocks are applied. CONSTITUTION:A sheet material A is made of short-fiber composite rubber mixed with short fibers 4 into matrix rubber 3, and the slide contact face 1 on the surface of the sheet material is buff-machined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material attached to a sliding contact portion such as a conveying road surface on which an object to be conveyed is conveyed in a sliding contact state.

[0002]

2. Description of the Related Art Conventionally, for example, in a parts conveying device, a sheet material having a low friction characteristic is attached to the conveying path as a kind of lining material so that the parts can smoothly move in a sliding contact state on the conveying path surface. It is known. As this kind of sheet material, conventionally, for example, a material made of asbestos hardened with resin or rubber, a material made of animal leather, or a material made of an elastic body such as urethane rubber is known. ing.

[0003]

However, each of the above sheet materials has problems in use due to its characteristics.
That is, the one using asbestos is limited due to environmental problems and is poor in flexibility, so that it is difficult to use it when an impact is applied.

[0004] Moreover, although animal leather has suitable flexibility and low friction characteristics, it is difficult to obtain stable quality because the material is not an industrial product but a natural product. .

Further, the one using an elastic body such as rubber is very excellent in flexibility and is suitable for the case where a shock is applied, but since the friction coefficient becomes large, the low friction characteristic is obtained. It is difficult to obtain.

The present invention has been made in view of the above points, and an object thereof is a sheet material having excellent low friction characteristics and having stable quality which can be used even when an impact is applied. Is to get.

[0007]

In order to achieve the above object, in the present invention, the sheet material is made of rubber so as to have flexibility, and the short fibers are mixed into the rubber, whereby the sheet material is made. To have low friction characteristics.

Specifically, in the invention of claim 1, the front surface is a sliding contact surface and the rear surface is a mounting surface, and the sliding contact surface is provided on the mounting surface so as to slidably contact an object. The premise is a sheet material that can be attached to a body to be attached.

The sheet material is composed of a short fiber composite rubber in which short fibers are mixed in a matrix rubber.
Further, the sliding contact surface is buffed.

In the invention of claim 2, the above-mentioned claim 1 is adopted.
In the invention, the short fibers are mixed in the matrix rubber in a state of being oriented in a direction substantially perpendicular to the sliding contact surface.

Further, in the invention of claim 3, in the invention of claim 1 or 2, the adhesive layer is provided on the mounting surface.

[0012]

According to the first aspect of the invention, the sheet material basically has flexibility as an elastic body due to the matrix rubber component of the short fiber composite rubber, and is excellent in impact resistance. Since the short fibers have a short fiber length, they are mixed in the matrix rubber with good dispersibility, and thereby the sheet material as the elastic body is provided with low friction characteristics substantially uniformly. Further, since the sliding contact surface of the sheet material is buffed, a part of the short fibers in the matrix rubber is exposed to the sliding contact surface, and the low friction characteristic is exhibited on the sliding contact surface. .

According to the second aspect of the invention, the short fibers are oriented in a direction substantially perpendicular to the sliding contact surface of the sheet material, so that the external force applied in the direction along the sliding contact surface can be improved. Since each fiber corresponds in a substantially vertical posture, the low friction characteristics are stabilized. Since the strength of the sheet material in the thickness direction is increased by such orientation of the short fibers, the abrasion resistance is also improved.

Further, according to the third aspect of the invention, since the adhesive layer is provided on the attachment surface of the sheet material, the sheet material can be directly attached to the attached body without using an adhesive.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a sheet material A according to this embodiment. The sheet material A is made of a short fiber composite rubber in which short fibers 4 are mixed in a matrix rubber 3. An adhesive layer 5 formed by applying an adhesive is provided on the entire surface, and a release paper 6 attached to the entire adhesive surface of the adhesive layer 5. Further, the sliding contact surface 1 on the surface of the sheet material A is buffed.

The short fiber composite rubber is a mixture of organic or inorganic short fibers 4 in a matrix rubber 3 made of natural rubber or synthetic rubber, and the fiber length of the short fibers 4 is 0.
It is 3 to 500 μm, preferably 5 to 50 μm, and the amount of fiber is 5 to 120 parts by weight, preferably 10 to 60 parts by weight with respect to 100 parts by weight of rubber 3. Regarding the orientation direction of the short fibers 4, as shown in FIG. 3, the short fibers 4 are in the C orientation in which the short fibers 4 are oriented in a direction substantially perpendicular to the sliding contact surface 1 of the sheet material A, or as shown in FIG. In addition, the A-orientation is oriented in a direction substantially parallel to the sliding contact surface 1.

In the sheet material A constructed as described above,
Basically, it has flexibility as an elastic body due to the component of the matrix rubber 3 of the short fiber composite rubber and has excellent impact resistance, so that it can be used even when an impact is applied. On the other hand, since the short fiber 4 has a short fiber length and is mixed in the rubber 3 with good dispersibility, the sheet material A as the elastic body is provided with low friction characteristics substantially uniformly, and stable quality is obtained. To be Furthermore, since the sliding contact surface 1 of the sheet material A is buffed and a part of the short fibers 4 in the rubber 3 is exposed to the sliding contact surface 1, the sliding contact surface 1 has the above-mentioned low friction characteristics. Is fully demonstrated.

Further, in the C-orientation, each fiber 4 responds to the external force applied in the direction along the sliding contact surface 1 in a substantially vertical posture, thereby stabilizing the low friction characteristic. . Further, with respect to the external force in the direction of pressing the sliding contact surface 1, the strength of the sheet material A in the thickness direction is strengthened by each fiber 4, so that the wear resistance is also significantly improved.

Further, an adhesive layer 5 is attached to the mounting surface 2 of the sheet material A.
Since the sheet material A is provided, an adhesive is not required when the sheet material A is attached to the attached body, and the attachment work can be easily performed. Further, a release paper 6 is provided on the adhesive surface of the adhesive layer 5.
Is adhered to protect the adhesive surface, the sheet material A
If the release paper 6 is cut off from the adhesive surface immediately before the attachment is cut according to the shape of the attached body, it is possible to prevent the situation in which dust or dust adheres to the adhesive surface. The adhesive force of 5 is sufficiently exerted, and the sheet material A can be reliably attached to the attached body.

After the above sheet material A is cut into an appropriate shape, the release paper 6 is peeled off and the adhesive surface of the adhesive layer 5 is slidably contacted with the component transfer device 7 as an attached body as shown in FIG. When it was crimped and attached, it showed good sliding mobility and wear resistance with respect to the part B as the object.

Specifically, regarding the above-mentioned sheet material A, the following Table 1 is shown in each item of the type of matrix rubber 3, the type of short fibers 4, the amount of fibers, the average diameter and the orientation (A orientation or C orientation). As shown in FIG. 4, concrete examples 1 to 8 having different configurations, comparative examples 1 and 2 made of rubber in which fibers are not mixed for comparison, and short fibers are mixed but the surface is buffed. Comparative Example 3 and the comparative example 3 were prepared. Regarding the orientation of the short fibers 4, specific examples 1 to 7 are C-oriented, and specific example 8 is A-oriented.

[0022]

[Table 1] Table 2 below shows the results of examining the friction coefficient and wear resistance of the specific examples 1 to 8 and the comparative examples 1 to 3. As for the abrasion resistance, the values obtained by comparing the values of Example 1 with "1" are shown.

[0023]

[Table 2] As can be seen from Table 2, regarding the type of the matrix rubber 3, as can be seen by comparing Examples 2 and 7, the chloroprene rubber (Example 2) has a low friction property and the abrasion resistance is natural. The rubbers (specific example 7) are slightly higher than each other. However, there is no great difference in the characteristics, and it is judged that almost all elastomers can be adopted without particular limitation.

As for the kind of the short fibers 4, a specific example 4 is shown.
As can be seen by comparing Nos. 5 and 6, there is a tendency that the low-friction property decreases slightly in the order of para-aramid fiber (Specific example 6), polyester fiber (Specific example 4), and polyamide fiber (Specific example 5). There is no big difference and it is not particularly limited. It can be seen that para-aramid fiber (Specific Example 6) is suitable when abrasion resistance is particularly required.

Regarding the fiber amount of the short fibers 4, the specific example 1
As can be seen by comparing 2 and 3, the larger the amount of fibers, the more improved the low friction property and the greater the abrasion resistance. However, generally, when the fiber amount is 120 parts by weight or more, it becomes difficult to evenly disperse even the short fibers 4 in the matrix rubber 3, which is impractical from the viewpoint of kneading workability. Further, the one having 5 parts by weight (Specific Example 1) has considerably lower low frictional characteristics than the one having 25 parts by weight (Specific Example 2) and 40 parts by weight (Specific Example 3). Therefore, it is necessary to select the blending amount of the short fibers 4 in the range of at least 5 to 120 parts by weight, preferably 10 to 60 parts by weight.

Regarding the average diameter of the short fibers 4, the specific example 2
Although there is no big difference as can be seen by comparing No. 4 with each other, the thick one (Specific Example 4) has low friction characteristics and the thin one (Specific Example 2) has slightly higher wear resistance. Generally, if it is too thick (500 μm or more), processing problems occur. On the other hand, too thin (0.3 μm or less)
And the aspect ratio (the ratio L of the fiber length L to the fiber diameter D)
/ D) becomes large, and the particles cannot be uniformly dispersed in the rubber 3,
The undispersed lumps of the short fibers 4 become foreign matter and cannot exhibit a sufficient function. Therefore, it is appropriate to select the thickness of the short fibers 4 in the range of 0.3 to 500 μm in average diameter, preferably in the range of 5 to 50 μm.

Regarding the orientation direction of the short fibers 4, as can be seen by comparing Examples 2 and 8, the C orientation (Example 2) is excellent in both low friction characteristics and abrasion resistance, and In the case of the A orientation (Specific Example 8), there are some variations in the low friction characteristics.

Regarding the buffing, as can be seen by comparing Concrete Example 2 and Comparative Example 3, in the concrete example 2 in which the sliding contact surface 1 is buffed, the short fibers 4 are formed on the sliding contact surface 1. By sufficiently exposing it, the low-friction property is greatly improved.
In addition, since the short fiber 4 is mixed in the comparative example 3, the abrasion resistance is superior to the other comparative examples 1 and 2 as well.

Regarding the length of the short fibers 4, in general, if the length is too long, the aspect ratio becomes too large and the short fibers 4 cannot be uniformly dispersed by kneading. Is short and not practical. On the other hand, if it is too short, the reinforcing effect of the short fibers 4 becomes small and sufficient strength cannot be obtained. Therefore, the average length is in the range of 0.3 to 6 mm, preferably 0.6 to 3 m.
The range of m is appropriate.

Further, as the compounding agent of the matrix rubber 3, generally, a vulcanizing agent, a vulcanization accelerator, a reinforcing agent, an antiaging agent, etc. which are compounded into the rubber can be compounded and are not limited at all. is not.

[0031]

As described above, according to the first aspect of the invention, the sheet material is formed of the short fiber composite rubber in which the short fibers are mixed in the matrix rubber which is the elastic body, and the surface of the sheet material is slidably contacted. By buffing the surface to expose a part of the short fibers, it is possible to obtain a sheet material having excellent low friction properties and stable quality while being an elastic body having flexibility. .

According to the second aspect of the present invention, the low friction characteristics can be stabilized by mixing the short fibers into the rubber in a state of being oriented in a direction substantially perpendicular to the sliding contact surface of the sheet material. In addition, the wear resistance can be significantly improved.

Further, according to the third aspect of the invention, since the adhesive layer is provided on the attachment surface on the back surface of the sheet material, the sheet material can be easily attached to the installation location without using an adhesive.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a sheet material according to an embodiment of the present invention.

FIG. 2 is a perspective view of a sheet material.

FIG. 3 is a perspective view showing C orientation.

FIG. 4 is a perspective view showing A orientation.

FIG. 5 is a diagram showing a usage state of a sheet material.

[Explanation of symbols]

 1 Sliding contact surface 2 Mounting surface 3 Matrix rubber 4 Short fiber 5 Adhesive layer

Claims (3)

[Claims] 1. A sheet material, the front surface of which is a sliding contact surface, the back surface of which is a mounting surface, and which is mounted on a mounting body at the mounting surface so that the sliding contact surface slidably contacts an object. A sheet material comprising a short fiber composite rubber in which short fibers are mixed in a matrix rubber, and the sliding contact surface is buffed. 2. The sheet material according to claim 1, wherein the short fibers are mixed in the matrix rubber in a state of being oriented in a direction substantially perpendicular to the sliding contact surface. 3. The sheet material according to claim 1, which has an adhesive layer on the mounting surface.