JP6036250B2 - Elastic knitted fabric for anti-vibration rubber liner - Google Patents

Description

  The present invention provides an anti-vibration rubber liner that is less likely to cause molding flaws due to rubber injection pressure and has excellent adhesion to a rubber elastic body when the vibration-proof rubber is manufactured by integral injection molding of a rubber elastic body and a liner. This relates to a stretch woven or knitted fabric. It is suitably used for a vibration-proof rubber liner mounted on a stabilizer bar (also called an anti-roll bar) that suppresses a roll (an inclination of a vehicle body) that occurs when a vehicle such as an automobile travels or turns.

The stabilizer bar is mounted in order to suppress the roll of the vehicle body and improve the handling stability and the ride comfort, and is attached to the vehicle body via a vibration proof rubber. The stabilizer bar is a U-shaped spring steel, which connects the left and right suspension arms and reduces the tilt of the vehicle body due to the torsional reaction force when there is a difference in the sinking of the left and right suspensions. . The anti-vibration rubber is used in a connecting portion between the stabilizer bar and the vehicle body in order to suppress friction and noise generated from the vibration received by the tire from the road surface and torsion of the stabilizer bar. Therefore, a knitted fabric made of fluorine fiber, which is a low friction material, has been used for the sliding surface layer of the vibration-proof rubber.

  Conventionally, a liner using a low friction material for the sliding surface layer has had a problem of adhesion to a vibration-proof rubber body. When absorbing vibration and tilt of the vehicle body by vibration-proof rubber deformation, the liner and anti-vibration rubber will be peeled off if the adhesive strength is insufficient, affecting steering stability and ride comfort. This also caused abnormal noise. As a liner with improved adhesion to vibration-proof rubber, for example, Patent Document 1 and Patent Document 2 include a fabric including a fluorine-based fiber in a sliding surface layer and a heat-fusible fiber in a fixing surface. It is disclosed. In the integral injection molding with the rubber elastic body, the heat-sealing fibers are partially melted and can be firmly fixed at the intersection of the heat-sealing fibers with each other or with other fibers or on the adhesive surface with the rubber elastic body. However, the stretchability of the liner, that is, the followability to the deformation of the anti-vibration rubber is not perfect, and peeling may occur during continuous use.

JP 2008-150724 A JP 2009-292212 A

  The present invention further improves the problems of the prior art, and in addition to slidability under high load and adhesion to rubber, it is excellent in conformability with a rubber elastic body when the vibration-proof rubber is deformed. It is an object of the present invention to provide a stretchable woven or knitted fabric for an anti-vibration rubber liner that reduces the wrinkle of the liner due to the injection pressure of the rubber elastic body when the anti-vibration rubber is manufactured by integral injection molding of the rubber elastic body and the liner.

In order to solve this problem, the present invention has the following configuration.
(1) A woven or knitted fabric for anti-vibration rubber in which one surface layer is a sliding surface and the other surface layer is a fixed surface with rubber, and the layer that becomes the sliding surface is made of fluorinated fiber as an elastic fiber. It includes a wound composite yarn, the layer serving as a fixing surface includes elastic fibers, and any layer other than the sliding surface includes low stretch fibers having a melting point between 100 ° C. and 200 ° C. Stretch woven and knitted fabric for anti-vibration rubber liners.
(2) The elastic woven or knitted fabric for a vibration proof rubber liner according to any one of the above, wherein the fiber having a melting point between 100 ° C. and 200 ° C. is a polypropylene fiber.
(3) The elastic woven or knitted fabric for any one of the above-mentioned anti-vibration rubber liners, wherein the elastic fiber of the sliding surface is a polyurethane elastic yarn.
(4) The elastic woven or knitted fabric for an anti-vibration rubber liner according to any one of claims 1 to 3, wherein the elastic fiber on the fixing surface contains a bimetallic composite yarn obtained by combining PTT fiber and PET fiber.
(5) The elastic property for an anti-vibration rubber liner according to any one of the above, wherein the layer serving as the fixing surface is composed of a bimetallic composite yarn obtained by combining PTT fiber and PET fiber and a polypropylene yarn. Woven knitting.
(6) An anti-vibration rubber characterized in that any one of the elastic woven or knitted fabric for the anti-vibration rubber liner is fixed to the rubber.

  According to the present invention, it is excellent in slidability under high load, adhesion to rubber, followability to deformation of rubber, and rubber elasticity when producing anti-vibration rubber by integral injection molding of rubber elastic body and liner. There is provided an elastic woven or knitted fabric for a vibration-proof rubber liner, which is excellent in reducing wrinkles of a liner due to body injection pressure.

Sectional drawing showing the outline of one embodiment of the elastic woven or knitted fabric for the vibration-proof rubber liner of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an anti-vibration rubber material for an automobile stabilizer that incorporates a stretchable fabric for an anti-vibration rubber liner of the present invention. It is an example of AA 'arrow directional cross-sectional view of the vibration-proof rubber material 4 for stabilizers of FIG. FIG. 3 is an example of a cross-sectional view taken along the line AA ′ in which the cross-section of the vibration-proof rubber material 4 for stabilizers in FIG. 2 is different from that in FIG. 3. It is a figure of a shaping die and a woven / knitted fabric showing a method for confirming rubber vulcanization moldability. The arrows in the figure indicate the flow of the molten rubber elastic body injected into the mold.

  Hereinafter, the best mode for carrying out the present invention will be described.

  FIG. 1 is a schematic cross-sectional view of a stretchable woven or knitted fabric for an anti-vibration rubber liner showing an embodiment of the present invention. The elastic woven or knitted fabric 1 of the present invention is used as an anti-vibration rubber liner, and is a fabric having a woven and / or knitted form. Consisting of multiple layers, one surface layer is a sliding surface 2, the other surface layer is a fixing surface 3 with rubber, and the layer that becomes the sliding surface 2 is composed of a composite yarn in which a fluorine-based fiber is wound around an elastic fiber, and is fixed The layer to be the surface 3 is composed of elastic fibers, and any stretchable layer other than the sliding layer contains low stretchable fibers having a melting point between 100 ° C. and 200 ° C.

  By using a composite yarn in which fluorine fibers are wound around elastic fibers for the sliding surface layer and elastic fibers for the fixing surface layer, the woven or knitted fabric is stretched to prevent deformation of the anti-vibration rubber. Followability can be improved. However, when the anti-vibration rubber is manufactured by integral injection molding of the rubber elastic body and the liner, the woven or knitted fabric is expanded and contracted by the injection pressure of the rubber elastic body, and the structure tends to generate wrinkles. For example, as shown in FIG. 5, when the elastic woven or knitted fabric 1 for an anti-vibration rubber liner is attached in the molding die 6 and the molten rubber elastic body is injected, the molten rubber elastic body is shown as indicated by the arrow in FIG. As a result, wrinkles are generated in the elastic woven or knitted fabric 1 for the vibration-proof rubber liner. In particular, wrinkles are likely to occur at locations where the molten rubber elastic bodies merge from the left and right in FIG.

  Therefore, by adding low stretchable fibers having a melting point between 100 ° C. and 200 ° C. to the woven or knitted fabric, the stretchability at normal temperature is lowered, but the rubber elastic body immediately after the start of injection of the rubber elastic body is Even at the stage where it reaches the surface of the woven or knitted fabric, since the temperature of the woven or knitted fabric does not rise above the melting point, the stretchability of the woven or knitted fabric is low and wrinkles due to injection pressure are less likely to occur. The temperature of the woven or knitted fabric rises with the lapse of time of rubber molding, and the low elastic fiber having a melting point between 100 ° C. and 200 ° C. melts and mixes with the rubber. Will be expressed. By designing the yarn type and texture of the knitted knitted fabric so that the stretchability of the woven or knitted fabric is greater than the stretchability of the rubber elastic body, the structure of the anti-vibration rubber that can make maximum use of the elasticity of the rubber elastic body and Become.

  Here, if an elastic fiber is defined, it is preferable that it is a fiber whose elongation measured according to JIS L 1013: 2010 8.5.1 (standard time test) is 50% or more. Here, if the elongation is small, sufficient stretchability cannot be imparted to the woven or knitted fabric. Moreover, if a low stretch fiber is defined, the fiber whose elongation measured according to JIS L 1013: 2010 8.5.1 (standard time test) is 50% or less is preferable. If the elongation is too large, the woven or knitted fabric tends to expand and contract, and wrinkles tend to occur during integral injection molding with the rubber elastic body.

  Any low-stretch fiber having a melting point between 100 ° C. and 200 ° C. can be used as long as it satisfies the above requirements, but polypropylene fiber, polyethylene fiber, polylactic acid fiber, and the like are suitable. Polypropylene fibers are more preferred because of their price and ease of handling.

  The slidability of the sliding layer is achieved by the low friction characteristics of the fluorine-based fibers, reduces the frictional force when in contact with the object, can suppress the generation of abnormal noise due to twisting and rubbing under high load, Durability that can withstand repeated long-term use can be obtained.

  The fluorine-based fiber used in the present invention comprises a polymer having a repeating structural unit in which one or more fluorine atoms are bonded to main chain carbon or side chain carbon. The repeating structural unit here is preferably an ethylene group substituted or unsubstituted by carbon. Those composed of repeating structural units having a large number of fluorine atoms are preferred. For example, polytetrafluoroethylene (PTFE), tetrafluoroethylene-6 fluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), ethylene-4 fluoroethylene copolymer For example, it is more preferable to use PTFE fibers having excellent surface low friction characteristics. In addition, a copolymer obtained by copolymerizing the above-mentioned monopolymer or other components may be used, and in the case of copolymerization, it may be a copolymer of about 10% or less of the number of repeating structures.

  As the form of the fluorine-based fiber, either a monofilament composed of one filament or a multifilament composed of a plurality of filaments can be adopted. The above-mentioned multifilament can be constructed by combining fibers composed of a single polymer and a copolymer. However, if it is composed only of PTFE fibers having excellent surface low friction characteristics, the sliding property is more excellent and the friction is improved. This is preferable because the generation of abnormal noise is suppressed.

  The elastic woven or knitted fabric for the vibration-insulating rubber liner of the present invention is a low-friction coated elastic yarn composed of a fluorine-based fiber and a polyurethane elastic yarn in the layer of the sliding surface in order to impart a stretching function to the woven or knitted fabric. Is preferably used. Such a low-friction coated elastic yarn has a fiber form having a core-sheath structure, and has a core portion made of polyurethane elastic yarn and a sheath portion made of fluorine-based fiber. In this fiber, the polyurethane elastic yarn serving as the core is covered with the fluorine-based fiber serving as the sheath portion, and the fiber component exposed to the sliding surface side is the fluorine-based fiber, so that the stretchability and the sliding property of the woven or knitted fabric can be improved. Low friction characteristics of the moving surface can be achieved.

  In addition, as for the elastic fiber constituting the fixing surface with the anti-vibration rubber elastic body, an elastic yarn such as a polyurethane elastic yarn, or a bimetallic composite in which polytrimethylene terephthalate (hereinafter abbreviated as PTT) fiber and PET are combined. It is preferable to use a thread. Bimetallic composite yarn is a fiber that achieves expansion / contraction function with two types of polymer components with different shrinkage rates, and is a composite fiber multifilament in which two types of polyester polymers are bonded side by side along the fiber length. Can be used. Side-by-side type composite fibers are bonded with polymers having different intrinsic viscosities, copolymerization components, copolymerization rates, and the like, and develop crimps (crimps) due to differences in their elastic recovery characteristics and shrinkage characteristics. In the case of a side-by-side type composite having an intrinsic viscosity difference, stress concentrates on the high intrinsic viscosity side during spinning and drawing, so that the internal strain differs between the two components. Therefore, the high-viscosity side is greatly shrunk due to the difference in elastic recovery rate after stretching and the heat shrinkage rate difference in the heat treatment process of the woven or knitted fabric, and distortion occurs in the single fiber, which takes the form of a three-dimensional coil crimp. It can be said that the diameter of this three-dimensional coil and the number of coils per unit fiber length are determined by the shrinkage difference (including the elastic recovery rate difference) between the high shrinkage component and the low shrinkage component. And the number of coils per unit fiber length increases. The PTT composite fiber is composed of PTT, which is a high shrinkage component obtained from trimethylene glycol (1,3-propanediol) and terephthalic acid, and the low shrinkage component has interfacial adhesion to PTT, which is a high shrinkage component. A combination with a fiber-forming polyester that is good and has stable yarn-forming properties is preferred. In particular, as the latter example, PET obtained from ethylene glycol (1,2-ethylenediol) and terephthalic acid is preferable in consideration of mechanical properties, chemical properties, and raw material prices.

  In addition, as a polyurethane fiber as a yarn used on the fixing surface, in order to give a stretch function to the woven or knitted fabric, the polyurethane elastic yarn is used for fixing to rubber such as nylon fiber or polyester fiber such as PET and PTT fiber. It is preferable to use a coated elastic yarn coated with excellent fibers. Such a covered elastic yarn has a fiber form having a core-sheath structure, and is a fiber having excellent adhesion to a rubber elastic body such as a polyurethane elastic yarn as a core and nylon, PET fiber or PTT fiber as a core. It constitutes. For example, the elastic fiber of the woven or knitted fabric and the rubber elasticity are made by covering the polyurethane elastic yarn that becomes the core with the fiber that becomes the sheath, and the main component of the fiber that is exposed to the fixing surface side with the rubber is a fiber other than polyurethane. Adhesion with the body can be achieved.

  As described above, the polyurethane elastic yarn may be used for the sliding surface layer or the fixed surface layer, and in this case, the polyurethane elastic yarn is covered. As a form of winding of the sheath yarn in the coated elastic yarn, a single cover ring (abbreviated as “SCY”) in which the sheath yarn is wound in one direction around the core yarn, and a double cover in which the sheath yarn is wound further in the reverse direction from one side winding There is a ring (abbreviated as “DCY”). Among them, DCY is superior in covering properties compared to SCY, so it is suitable for further preventing the core yarn from being exposed during stretching, and it has no torque and is excellent in knitting and knitting workability. This is also preferable from the viewpoint of suppressing the variation.

  Further, it is not necessary for the fixing surface layer to contain a fluorine-based fiber, but it is naturally desirable to have excellent adhesion to rubber, and it is made of an organic polymer having nitrogen, oxygen, or sulfur atoms in the molecule. It is preferable to use fibers, and polyesters such as nylon, PET / PTT, aramid, polyphenylene sulfide fibers, and the like are preferable. Since these polymers have polar atoms, they are excellent in adhesion to rubber elastic bodies. Moreover, if the adhesiveness with rubber elastic bodies, such as natural fibers, such as cotton and wool, is favorable, this can also be selected suitably and used. Various additives may be included in the polymer as described above in order to improve productivity or properties in the production process and processing process of the raw yarn. For example, a heat stabilizer, an antioxidant, a light stabilizer, a smoothing agent, an antistatic agent, a plasticizer, a thickener, a pigment, a flame retardant, and the like can be included. Among the polymers, it is preferable to use nylon or PET fiber in terms of good thermal stability, excellent high-order processability such as woven fabrics and knitted fabrics, and low adhesiveness and cost with rubber materials. It is particularly preferable to use nylon fibers from the viewpoint of adhesiveness.

  As the form of the fiber such as nylon or PET fiber, either monofilament or multifilament can be adopted as in the case of the above-mentioned fluorinated fiber, but when the multifilament is bonded to another material such as an anti-vibration rubber elastic body. This is preferable because the adhesiveness and adhesiveness of the resin become better. In order to obtain further excellent adhesiveness, a spun yarn can be employed in the present invention. Because the surface layer of the spun yarn has a plurality of fluff that is not usually found in multifilaments and the like, when bonded to other materials such as rubber elastic bodies, the apparent surface area is larger than that of multifilaments. Since it is large, the adhesiveness is improved and the anchor effect by the fluff is expressed, so that it is possible to obtain a stretchable fabric for a vibration-proof rubber liner having better adhesiveness. The spun yarn may be obtained by uniformly mixing different fibers at a desired ratio and obtaining fibers having desired characteristics. The spun yarn may contain a heat fusion fiber. By containing the fiber, the low melting point component of the heat-fusible fiber is partially melted when heated, and the adhesion to rubber is further strengthened. In addition, it is possible to prevent the end portion from being fluttered when the woven or knitted fabric is cut.

  In the present invention, a low stretch fiber having a melting point between 100 ° C. and 200 ° C. is included in any layer other than the sliding surface layer. When the layer including the sliding surface contains low stretchable fibers having a melting point of between 100 ° C. and 200 ° C., when the anti-vibration rubber is manufactured by integral injection molding together with the elastic rubber, the temperature is from 100 ° C. to 200 ° C. The low-stretch fiber in the middle melts and remains on the sliding surface of the anti-vibration rubber after molding, thereby adversely affecting the slidability of the anti-vibration rubber. When low-stretch fibers having a melting point between 100 ° C. and 200 ° C. are contained in a layer other than the sliding surface, the sliding surface with the anti-vibration rubber will melt even if it is melted in the integral injection molding with the elastic rubber. The possibility of remaining is small, and the slidability of the anti-vibration rubber is good.

  What is suitable as an anti-vibration rubber used by this invention has a shape provided with the insertion hole used as a sliding part in the center part of a rubber elastic body. In general, the rubber is injected into a mold for molding the vibration-proof rubber and molded by injecting the rubber at high temperature and high pressure. In this case, what was in an unvulcanized state becomes a vulcanized state. In addition, as the shape of the insertion hole of the anti-vibration rubber, the type composed of a straight through hole is the mainstream, but inside is a tapered type, that is, the outer diameter of one insertion hole and the other insertion hole. There are also different anti-vibration rubbers. These anti-vibration rubber insertion holes are formed by placing anti-vibration rubber molding in the state where a solid iron core of the same size as the required insertion hole is set at the center of the anti-vibration rubber molding die. It can be obtained by doing. At that time, the surface side of the insertion hole has a low friction covering elasticity by setting it in the mold with the sliding surface side of the elastic woven or knitted fabric for vibration-proof rubber of the present invention in contact with the surface side of the iron core. The low friction characteristic by the yarn and the fixation to the rubber can be achieved by a fiber composed of a layer for the fixing surface. The anti-vibration rubber having the tapered insertion hole prevents foreign matter from entering a gap generated between the stabilizer and the anti-vibration rubber due to a roll (inclination of the vehicle body) generated when the vehicle such as an automobile travels or turns. The purpose is to suppress the gap between the stabilizer bar and the outer diameter of one of the insertion holes to be smaller than the diameter of the stabilizer bar. Yes. As a method of molding anti-vibration rubber with such a tapered insertion hole, the shape of the iron core set in the anti-vibration rubber molding die described above can be changed easily from a straight type to a taper type. By using the stretchable woven or knitted fabric of the present invention, the entire stretchable woven or knitted fabric becomes easy to follow along the surface of the iron core having a different diameter, and a vibration-proof rubber excellent in followability with rubber is obtained. It can be done.

  FIG. 2 is a schematic diagram of an anti-vibration rubber for an automobile stabilizer incorporating the elastic woven or knitted fabric for the anti-vibration rubber liner of the present invention. In FIG. 2, the vibration-proof rubber material 4 for the stabilizer includes a rubber elastic body 5 made of a rubber elastic resin having an insertion hole in the center, and the anti-vibration of the present invention provided on the entire inner peripheral surface of the insertion hole of the rubber elastic body. The elastic woven or knitted fabric 1 is used as a vibration rubber liner. The fixing surface of the elastic woven or knitted fabric 1 is fixed to the rubber elastic body 5.

    FIG. 3 is an example of a cross-sectional view taken along the line AA ′ of the vibration-proof rubber 4 for the stabilizer in FIG. 2.

  As another aspect, FIG. 4 is an AA ′ arrow cross-sectional view of the stabilizer rubber 4 of FIG. 2, and is an example of a cross-sectional shape different from that of FIG. 3.

  The total fineness of the fibers constituting the elastic woven or knitted fabric for vibration-insulating rubber liner of the present invention is preferably in the range of 5 to 2000 dtex, and more preferably in the range of 40 to 1500 dtex, regardless of the layer. It is preferable. If the total fineness of the fibers constituting the knitted or knitted fabric is equal to or greater than a certain value, the strength of the fibers is strong, and the thread breakage during the knitting process can be reduced, so the process passability is improved. On the other hand, if there is less than a certain value, the surface of the woven or knitted fabric has less unevenness, so there is no effect on slidability, etc., and the rigidity of the woven or knitted fabric does not become too high, and flexibility is not impaired. An elastic woven or knitted fabric for an anti-vibration rubber liner that can easily follow the iron core of a rubber mold is obtained.

  The elastic woven or knitted fabric has a multilayer structure of double woven or double warp knitting (double raschel knitting). It is possible to configure with an easily adhesive-coated elastic yarn. Among them, double warp knitting (double raschel knitting) knitted with a raschel knitting machine, which can be simultaneously processed into a cylindrical shape while knitting a multi-layered fabric, is a low friction coated elastic yarn on the inner sliding surface layer. In addition, since it is possible to configure the layer of the adhesion surface with the rubber on the outer peripheral surface side with the easily adhesive-coated elastic yarn, the elastic woven or knitted fabric for the vibration-proof rubber liner of the present invention has low friction performance and a rubber elastic body. It is preferable because it can achieve both the fixing properties.

  Examples of the rubber elastic body used for the vehicle vibration-proof rubber according to the present invention include natural rubber (NR), butadiene rubber (BR), styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), and chloroprene rubber. A single product such as (CR) or a combination of these can also be used. Among them, NR and SBR are preferable, and are suitable for use in combination with the elastic woven or knitted fabric for the vibration-insulating rubber liner of the present invention. The iron core of the anti-vibration rubber mold has a workability in the anti-vibration rubber molding process by attaching a stretchable woven or knitted fabric formed in a cylindrical shape, and the entire elastic woven or knitted fabric is on the surface of the iron core. It is excellent in that it is easy to follow. Also, the surface of the iron core is inserted so as to be in contact with the low-friction coated elastic yarn layer constituting the sliding surface layer, so that the easy-adhesion coated elastic yarn constituting the rubber-fixed surface layer is formed. An anti-vibration rubber in which the layer side and the vulcanized rubber are firmly fixed is obtained.

  As described above, the elastic woven or knitted fabric for the anti-vibration rubber liner of the present invention uses a composite yarn in which fluorine fibers are wound around an elastic fiber for the sliding layer, an elastic fiber for the fixing layer, and other than the sliding layer. When the anti-vibration rubber is produced by integral injection molding of the rubber elastic body and the liner, the low-stretch fiber having a melting point between 100 ° C. and 200 ° C. is included in the layer of Wrinkles are less likely to be generated, and a stretchable woven or knitted fabric for an anti-vibration rubber liner can be provided that is suitable for suppressing friction and noise generated by vibrations received by the tire from the road surface and twisting of the stabilizer bar.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, what is shown in a figure is one Example, It is not limited to this.

  Hereinafter, although an example is given and the present invention is explained, the present invention is not necessarily limited to this. (R) means a registered trademark.

[Measurement and evaluation method]
1. Melting point Using a differential scanning calorimeter (TYPE: DSC-60) manufactured by Shimadzu Corporation, sample amount is about 2 mg, cell material is aluminum, start temperature is 30 ° C., heating rate is 2 ° C./min, dry gas is 250 ml / min (nitrogen) ), The apparatus was operated under a purge gas operating condition of 20 to 50 ml / min (nitrogen), and the melting point of the sample was determined from the peak of the obtained DSC waveform.

2. Yarn elongation percentage Measured according to JIS L 1013: 2010 8.5.1 (standard time test). The elongation was measured at a tensile speed of 50 ± 3 cm / min and a sample gripping interval of 50 cm, and calculated by the following formula. Evaluation was performed with an average value of N = 10.

Elongation rate (%) = (Elongation at maximum load (mm)-Looseness (mm))
× 100 / (gripping interval (mm) + loosening (mm)).

3. In order to confirm rubber vulcanization moldability, a molding die 6 shown in FIG. 5 is prepared, and the stretchable woven or knitted fabric 1 is set in advance in the cylindrical portion of the central portion of the die, After preheating to about 170 ° C., unvulcanized rubber was injected in the direction of the arrow and integrally molded, and the wrinkled state of the woven or knitted fabric was confirmed.

4). Followability between rubber elastic body and stretchable woven / knitted fabric The width 5cm × length 30cm × thickness 5mm SBR unvulcanized rubber on one side of the fixed surface of stretchable woven / knitted fabric 5cm wide × 30cm long Overlay, put in a vulcanization mold, perform vulcanization press molding at 170 ° C. for 10 minutes, and allow to cool, to obtain a test piece. The obtained test piece was slit to a width of 2.5 cm, and the test piece was set at a gripping interval of 200 mm in accordance with JIS L 1096: 2010 8.16.4 B method (repeated load method). The test piece is stretched to 1 minute and held for 1 minute, then returned to its original position and held for 3 minutes. This is repeated 10 times, the 10th time is extended to 120%, and then held for 3 minutes to draw a load-elongation curve. The stress relaxation rate by the repeated load method was obtained as an index indicating the followability between the rubber elastic body and the stretchable knitted fabric by the following formula, and the average value of the three sheets was calculated. The stress relaxation rate by the repeated load method is such that when the elastic property of the rubber elastic body and the elastic woven or knitted fabric is at the same level and the elastic woven or knitted fabric has excellent followability with the rubber elastic body, the stress relaxation rate tends to be low. On the contrary, when the followability between the elastic woven fabric and the rubber elastic body is poor, the elastic woven fabric is broken during the test, or the elastic woven fabric is peeled off from the rubber elastic material, so that the stress relaxation rate is high. Show the trend.
Load when extended for the first time: T2 (N)
Load when extended for the 10th time: T10 (N)
Stress relaxation rate by repeated load method (%) = ((T2-T10) / T2) × 100
Furthermore, the state of the post-test piece after the 120% stretching operation was repeated 10 times continuously (whether the stretch woven or knitted fabric was broken or peeled off) was observed.

  Stress relaxation rate by the repeated load method (trackability between rubber elastic body and elastic knitted fabric) is 30% or less ○ (good trackability), 30% or more × (Follow trackability / occurrence of fabric peeling) It was determined.

  The evaluation results of each example and comparative example are shown in Table 1. Note that (R) after the noun indicates a registered trademark.

[Example 1]
Polyurethane elastic yarn (Operontex Co., Ltd. “Lycra” (R) 117T-127C) and sheath yarn fluorinated fiber (Toyoflon (R) 440T-60F-S290-M300) manufactured by Toray Industries, Inc. Using a covering machine (SSD-230 manufactured by Kataoka Machine Co., Ltd.), the draft rate of polyurethane elastic yarn is set to 3 times, single covering processing (1103 T / M) is performed, and the elongation rate is 3 times. An elastic yarn (1) for a moving layer was produced. In Table 1, “Fluorine / PU” is indicated.

  Toray PTT-PET (330T-68F-400) bimetallic composite yarn was used as the elastic yarn (2) for the fixing layer. In Table 1, it was described as “PTT-PET”.

  Using low-stretch fiber (3) having a melting point between 100 ° C. and 200 ° C., polypropylene fiber pyrene (R) (84T-24F-N10) manufactured by MRC Pyrene Co., Ltd., elastic yarn for fixing layer (2) And 200 t / m were twisted together to produce a twisted yarn (4) for the fixing layer.

  Using the elastic yarn (1) for the sliding layer and the twisted yarn (4) for the fixing layer, the elastic yarn 1 for the sliding layer is used as the connecting yarn for the ear portion, and the double raschel knitting machine is used. The knitted fabric was knitted to have a course density of 29 course / 25.4 mm, a well density of 19 well / 25.4 mm, and a cylindrical width of 34 mm.

[Example 2]
Using the elastic yarn (1) for the sliding layer and the twisted yarn (4) for the fixing layer, and using the elastic yarn (1) for the sliding layer as a connecting yarn for the ear portion, on a ribbon loom A double cylindrical plain weave with a weave density of 60 pieces / 25.4 mm and a width of 60 pieces / 25.4 mm was woven so as to have a tubular width of 34 mm.

[Comparative Example 1]
Nylon 6 fiber Amilan (R) (235T-24-720) manufactured by Toray, which has a melting point of 225 ° C., is used instead of the low stretch fiber (5) whose melting point is between 100 ° C. and 200 ° C. The elastic yarn 2 was twisted at 200 t / m to produce a twisted yarn (6) for the fixing layer.

  Using the elastic yarn (1) for the sliding layer and the twisted yarn 6 for the fixing layer, and using the elastic yarn (1) for the sliding layer as the connecting yarn at the ear, the double raschel knitting machine The knitted fabric was knitted to have a course density of 29 course / 25.4 mm, a well density of 19 well / 25.4 mm, and a cylindrical width of 34 mm.

[Comparative Example 2]
The elastic yarn (1) for the sliding layer and the elastic yarn 2 for the fixing layer are used, and the elastic yarn (1) for the sliding layer is used as the connecting yarn for the ear portion. The knitted fabric was knitted to have a course density of 29 course / 25.4 mm, a well density of 19 well / 25.4 mm, and a cylindrical width of 34 mm.

[Comparative Example 3]
As the thread (7) for the sliding layer, Toray Industries, Inc. fluorine fiber Toyoflon (R) (440T-60F-S290-M300) was used.

  As the yarn 8 for the fixing layer, Toray heat-fusible raw cotton safmet (R) (9615-4.4T51 mm) having a single yarn fineness of 4.4 dtex, a cut length of 51 mm and a melting point of 164 ° C., a single yarn fineness of 1.6 dtex, Polyester raw cotton Tetron (R) (471-1.6T51 mm) manufactured by Toray with a cut length of 51 mm and a melting point of 254 ° C. was blended in a weight ratio of 50:50, respectively, to obtain a spun yarn having a total fineness of 590 dtex.

  The sliding layer yarn (7) and the fixing layer yarn (8) are used, and the sliding layer yarn (7) is used as the tie yarn of the ear portion. The ed. Of Citation 1, which is an example in which the elastic density is not included in the sliding layer and the fixing layer so that the course density is 29 course / 25.4 mm, the well density is 19 well / 25.4 mm, and the cylindrical width is 34 mm. Knitted the ground.

[Comparative Example 4]
Using the above-mentioned sliding layer yarn (7) and the fixing layer double twisted yarn (4), and using the above sliding layer yarn (7) as the connecting yarn for the ears, a double Russell knitting machine Included is a composite yarn in which a fluorinated fiber is wound around an elastic fiber so that the course density is 29 course / 25.4 mm, the well density is 19 well / 25.4 mm, and the cylindrical width is 34 mm. Knitted fabric.

  As is clear from the evaluation results in Table 1, the elastic woven or knitted fabric for the anti-vibration rubber liners of Examples 1 and 2 is wrinkled at the time of integral injection molding of the rubber elastic body and the liner as compared with Comparative Examples 1 to 4. It was difficult to perform, and the followability of the liner to the rubber elastic body was good.

  INDUSTRIAL APPLICABILITY The present invention is suitably used for a vibration-proof rubber material for a vehicle that is mounted on a stabilizer (also called an anti-roll bar) that suppresses a roll (an inclination of a vehicle body) that occurs when a vehicle such as an automobile travels or turns. It is possible to prevent the generation of abnormal noise and wear by suppressing the mixing of foreign substances such as, and is suitably used as a stretchable woven or knitted fabric for a vibration-proof rubber liner having good adhesion to rubber.

DESCRIPTION OF SYMBOLS 1 Elastic woven / knitted fabric 2 Sliding surface 3 Adhering surface 4 Anti-vibration rubber material 5 Rubber elastic body 6 Mold

Claims (6)

It is a woven or knitted fabric for anti-vibration rubber, in which one surface layer is a sliding surface and the other surface layer is a fixed surface with rubber, and the layer that becomes the sliding surface winds a fluorinated fiber around an elastic fiber. Anti-vibration characterized in that it comprises a composite yarn, the layer serving as the fixing surface contains elastic fibers, and any layer other than the sliding surface contains low stretch fibers having a melting point between 100 ° C. and 200 ° C. Elastic knitted fabric for rubber liners. The stretchable woven or knitted fabric for a vibration-proof rubber liner according to claim 1, wherein the fiber having a melting point between 100 ° C and 200 ° C is a polypropylene fiber. The elastic woven or knitted fabric for an anti-vibration rubber liner according to claim 1 or 2, wherein the elastic fiber of the sliding surface is a polyurethane elastic yarn. The elastic woven or knitted fabric for an anti-vibration rubber liner according to any one of claims 1 to 3, wherein the elastic fiber of the layer serving as the fixing surface contains a bimetallic composite yarn obtained by combining PTT fiber and PET fiber. . The elastic layer for an anti-vibration rubber liner according to any one of claims 1 to 4, wherein the layer serving as the fixing surface is composed of a bimetallic composite yarn obtained by combining PTT fiber and PET fiber and a twisted yarn of polypropylene fiber. Sexual knitted fabric. 6. An anti-vibration rubber, characterized in that the elastic woven or knitted fabric for the anti-vibration rubber liner according to claim 1 is fixed to the rubber.

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