JPH0730804B2 - Brake lining material for heat resistance - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat resistant woven fabric woven using a blended yarn made of a blend of a stainless steel fiber material and a ceramic bulk fiber, and particularly to its heat resistance and towability. sex. Strength flexion. It is a heat resistant brake lining material with improved mechanical properties such as wear resistance.

<Prior Art> As a conventional material for heat resistance, for example, asbestos. It is known that a heat-resistant fiber material such as a metal fiber is processed into a cloth-like product or the like by using a spun yarn obtained by mixing these with other fiber materials and spun yarn, and these are due to their material properties. , For example, has been widely used in a relatively low temperature environment of 600 ° C or lower.

However, recently, the use of the asbestos material has been largely suppressed and gradually decreased for health reasons affecting the human body.

On the other hand, as a new material to replace the asbestos material, carbon fiber and ceramic fiber material have been developed on the other hand, and especially fiber material made of ceramic has excellent corrosion resistance and heat resistance capable of withstanding a temperature of 1200 ° C or more. Since it is also lightweight, it has already been put to practical use as a material for FRM engine parts and the like.However, as for the spun product, the fiber material is inferior in bending and abrasion resistance and is easily broken, and its length is also compared. Since it is extremely short, it was difficult to perform spinning processing by itself.

Further, in Japanese Patent Application Laid-Open No. 58-46145, there is also disclosed a heat-shielding cloth using a ceramic fiber, which has a flame-resistant structure obtained by firing carbonization of ceramic fiber and organic fiber such as acrylic fiber. It is a plain-woven cloth using a raw yarn in which a mixed yarn with fibers is reinforced with a metal wire.

However, its use is limited to mere shielding curtains that prevent welding sparks and scattering of molten metal, and there is no mention of improving its workability, bending wear resistance, and elasticity. Absent.

In particular, the carbonized fiber used as one material of the cloth is generally inferior in flexibility and easily broken, so that high technology is required at the time of processing such as a spinning process and a woven process, and in the obtained product. However, it was not suitable for applications such as packing belts that are subjected to repeated strong processing, and was therefore limited in terms of applications.

<Purpose of the Invention> The present invention has been made in view of such problems in the related art, and in particular, 600
Heat resistance to withstand temperatures above ℃ and even in the above applications,
It is an object of the present invention to provide a heat-resistant brake lining material having both sufficient bending and wear resistance without fatigue and breakage during use.

DISCLOSURE OF THE INVENTION That is, the present invention is a blended yarn prepared by blending a stainless steel fiber material having a fiber diameter of 2 to 50 μm and a ceramic bulk fiber that has not been subjected to secondary processing, and is woven in layers. It is a heat-resistant brake lining material.

An example of the present invention will be described below together with its manufacturing method.

Now, in Fig. 1, the fiber diameter made of stainless steel is 2 to 50 μm.
Brake lining material (hereinafter referred to as lining material) in which a blended yarn 4 obtained by blending the fiber material 2 and the ceramic bulk fiber 3 containing alumina / silica or the like is used as the warp yarn 5 and the weft yarn 6. ) 1 is shown as an example.

Overlap weaving is a warp in its cross section as shown in the figure.
5, One or both of the weft threads 6 are overlapped two or more times and are woven as a whole into one woven fabric.

Especially for applications where strength and elasticity are strongly required, such as the conveyor belt, packing material, and lining material,
The thickly woven material is used.

The lining material according to the present invention is for contacting a rotating or rolling target object and for slowing or stopping this motion, and in order to withstand the pressing force, friction, and wear associated with the contact, Overlaid with the detailed blended yarn.

One of the features of the present invention is that the yarn constituting the lining material 1 is a stainless steel fiber material 2 having a fiber diameter of 2 to 50 μm, and a ceramic fiber having a relatively short length and unprocessed cotton collecting fibers. That is, the blended yarn 4 obtained by blending with the ceramic bulk fiber 3 in the state is used.

The mixed yarn 4 is prepared by mixing both the fibers 2.3 at a ratio of, for example, 5 to 95 Wt% according to the purpose of use, and 2 to 10 times / i.
A blended yarn 4 may be a blended yarn in which a twist of about n. is imparted, or a blended yarn obtained by further twisting a plurality thereof.

Further, the stainless steel fiber 2 has
It may be arranged so as to be appropriately dispersed or concentrated,
For example, for use in a higher temperature environment, the stainless steel fibers 2 may be uniformly dispersed, or the stainless steel fibers 2 may be concentrated in the central portion and surrounded by the ceramic fibers 3. If stainless steel fiber 2
It is possible to prevent a direct thermal effect on the material and further prevent its deterioration.

Further, in the latter case of the mixed twisted spun yarn, each single yarn may be a combination of the same constitution, or may be a heterogeneous combination of different thickness, mixing ratio, etc., and can be carried out by a known method.

FIG. 2 shows, as an example of such a blended yarn, a state of a yarn which is uniformly distributed and twisted in the cross-sectional direction.

The stainless steel fiber material 2 used in the present invention is, for example, a so-called tow of stainless steel-focused fibers having a fiber diameter of 2 to 50 μm obtained by a method such as a composite focusing wire drawing method disclosed in Japanese Patent Publication No. 56-11523. A sliver-shaped product obtained by further cutting these into a desired length, for example, about 20 to 100 mm by a Parlock cutting machine can be used, and the sliver-shaped product is particularly desirable when uniformly dispersed. In addition, stainless steel fiber material is more corrosion resistant than ceramic material. Although the heat resistance is somewhat inferior, the bending wear resistance and towability against fir, etc. are very good, and its elasticity should be greatly improved along with the tensile strength by the final cold drawing ratio etc. Is possible. Therefore, by using these, the workability in the spinning process and the subsequent weaving process can be improved and problems such as breakage can be solved.

This tendency is especially true for tensile strengths of 100 Kgf / mm2 and above.

Further, in the present invention, the fiber diameter is set to 2 to 50 μm. However, if the fiber diameter exceeds 50 μm, it becomes difficult to disperse the fibers uniformly as shown in FIG. 1, and the entanglement with the ceramic fiber 3 becomes difficult. , On the contrary, 2
If it is less than μm, the elasticity of the yarn itself is poor, and the stainless steel fibers are also easily affected by heat, making it difficult to achieve the object.

Next, the ceramic bulk fiber which is the other material will be explained. The fiber 3 is, for example, a kaolin calcined product or alumina. Add an appropriate amount of flux to the mixture of silica raw materials, etc., if necessary, and use an induction heating furnace etc. for 2200
Collected cotton obtained by a method such as a blowing method in which it is melted by heating to ~ 2300 ° C and allowed to flow out, and then blown off with compressed air or high-pressure steam, or a spinning method in which it is dropped on the side surface of a rotating disk and made into fibers by the centrifugal force. The fiber 3 has a heat resistant temperature of 1200 ° C. or higher and a fiber diameter of 1 to 5 μm and a predetermined length (for example, 50 mm or less). Of course, the value is not limited to that.

The stainless steel fiber material 2 and the ceramic bulk fiber 3 obtained in this way are 5 to 5 depending on the purpose of use.
The two are blended while opening with an opener at an arbitrary mixing ratio of 95 Wt%, and further spun into a sliver shape mixed with a special Ryu cotton machine. After that, twisting is further applied by, for example, about 2 to 10 times / in. By an ing spinning machine to complicate the entanglement of both, and a single spun yarn is obtained by the circumferential surface pressure of twisting.

In addition, it is easy to obtain a single blended yarn by ply-twisting using a plurality of these strands by giving a twist in the opposite direction (for example, 2 to 10 times / in.), And in particular, the stainless steel obtained by the above-mentioned method. As shown in FIG. 3, the fibrous material 2 has a rough surface due to sharp edges 7 and grooves 8 generated along its longitudinal direction, and its cross-sectional shape is also irregular. It becomes a large and strong mixed yarn.

Further, the stainless steel fiber 2 may be arranged, for example, by mixing a tow in the central part thereof and a sliver around the tow mixed with the ceramic fiber.

The heat-resistant blended fiber 1 of the present invention is layered and woven by using the blended yarn 4 configured as described above, and therefore even a ceramic bulk fiber having a short length is reliably held between the stainless steel fibers 2. In addition, the strength of the circumferential surface due to the twisting is excellent, the scattering of the ceramic bulk fiber 3 is small, and the elasticity and bending resistance can be improved.

Further, in terms of its heat resistance, the lining material of the present invention has a composite effect such that the two are compounded and twisted to soften heat absorption to the stainless steel fiber 2 and prevent a direct influence. Since it has high heat resistance as well as strength, elasticity, flexibility, and bending abrasion resistance, it is possible to improve the service life. Further, the woven fabric having such a structure is further used as a heat-resistant conveyor belt material and a packing material,
Alternatively, it can be applied as a sound deadening cushioning material for a material conveying roller in a steel mill or the like.

Next, examples of the present invention will be described.

<Example-1> A SUS316L stainless steel fiber having a fiber diameter of 12 µm was put into a Parlock cutting machine to obtain a sliver having an average length of 50 mm.

This stainless steel fiber and alumina as the ceramic fiber. A thick 2 mm mixed spun yarn was obtained by using 4 single yarns obtained by uniformly dispersing silica-based bulk fibers having an average fiber diameter of 3 μm in a weight ratio of 3: 2.

This blended yarn is applied to a lining loom to fabricate a three-layered woven cloth product with a thickness of 6 mm and a width of 30 mm, and in order to investigate its properties, the change in strength with heating temperature and the ignition loss test specified by JIS3450, Further, the repeated bending test shown in FIG. 4 was performed to examine the number of times until the damage.

The results are shown in Table 1.

<Comparative example> Using the mixed yarn (thickness 2 mm) in which asbestos fiber and heat-resistant nylon fiber were mixed-spun at a weight ratio of 3: 2 and twisted with four fibers, a cloth product similar to that of Example-1 was produced. Each test described above was performed.

<Effects of the Invention> As described in detail above, the present invention provides a ceramic bulk fiber having excellent heat resistance, particularly a ceramic bulk fiber in a cotton collecting state not subjected to secondary processing, and a stainless steel fiber material. It is a brake lining material that has excellent heat resistance, strength, and bending and abrasion resistance because it is layered and woven with a blended yarn that is blended from

In particular, in the present invention, for example, although the conventional heat resistance is excellent, the spinning treatment of the ceramic fiber, which has been difficult to spin by itself, is performed by using the stainless steel fiber having excellent strength, elasticity, and towability. The heat resistance, which was made possible by using the blended mixed yarn, and which was also slightly lacking in stainless steel, can prevent its thermal deterioration by the adhesion protection by twisting with the ceramic fiber. High workability is obtained by the composite action that makes use of the advantages of the materials, and as a result, the range of application can be greatly expanded.

Further, in the present invention, ceramic fibers which are not problematic in terms of pollution are used, and since they are securely held by twisting with stainless steel fibers, their scattering is prevented, and further, these are understood from the above-mentioned examples. In addition, the shrinkage and the strength decrease due to the heating temperature are extremely small, and since it does not become carbonized dust, it is extremely preferable from the viewpoint of the shape change during use and the environment.

[Brief description of drawings]

FIG. 1 is a sectional perspective view of a brake lining material of the present invention, and FIG. 2 is a perspective view of an example of a blended yarn. Further, FIG. 3 is an enlarged view showing the state of the stainless steel fiber used in the present invention, and FIG. 4 is a schematic view showing the test method. In the figure, 1 ... Brake lining material 2 ... Stainless steel fiber 3 ... Ceramic bulk fiber 4 ... Blended yarn.

Claims (3)

[Claims] 1. A blended yarn obtained by blending a stainless steel fiber material having a fiber diameter of 2 to 50 μm and a ceramic bulk fiber in a state of non-secondary processed cotton, which is layered and woven. Heat resistant brake lining material. 2. The tensile strength of the stainless steel fiber is 10
The heat-resistant brake lining material according to claim 1, which has a resistance of 0 Kgf / mm 2 or more. 3. The heat-resistant brake lining material according to claim 1, wherein the stainless steel fiber has an irregular cross-section with ridges and grooves along the longitudinal direction.