JP2006183160A - Method for adhesive treatment of woven cloth for rubber reinforcement and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive treatment method capable of applying a sufficient amount of an adhesive for rubber even to a longitudinally stretchable woven cloth while keeping the longitudinal stretchability to an extent and giving a longitudinally stretchable woven cloth for rubber reinforcement having a sufficient residual elongation in longitudinal direction. <P>SOLUTION: An adhesive is continuously applied to a moving woven cloth for rubber reinforcement by fixing the right and left edges of the woven cloth F for rubber reinforcement with pins or clips, applying the adhesive liquid to the surface of the woven cloth for rubber reinforcement with a sprayer 5 and drying the liquid in a drying step 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an adhesive treatment method and apparatus effective for producing a rubber-reinforced warp-elongated woven fabric for adhering to a meshing surface of a power transmission toothed belt. More specifically, the present invention relates to a processing method and apparatus capable of continuously performing an adhesive treatment while transferring a warp-elongated woven fabric for rubber reinforcement.

  In the toothed belt for power transmission, the surface of the tooth portion of the belt main body is covered with a rubber reinforcing fabric. The reinforcing woven fabric is arranged so as to cover the tooth surface of the belt body, and then molded so as to have the same shape as the uneven shape of the tooth surface in order to closely contact the tooth surface. Since the reinforcing woven fabric is stretched in the longitudinal direction of the belt during this molding, the reinforcing woven fabric needs to be extensible in the direction in which it is disposed in the longitudinal direction of the belt.

  As such a woven fabric for reinforcing a toothed belt that can be extended in one direction, various types of woven fabrics using a stretchable yarn as a weft are known. For example, a reinforcing woven fabric using nylon crimped yarn as the weft is known (see Patent Document 1, Patent Document 2, etc.).

  Further, in order to firmly bond the reinforcing woven fabric to the surface of the tooth portion of the belt main body (made of rubber), it is necessary to treat with an adhesive for rubber bonding after weaving. As this adhesive, an RFL (resorcin / formalin / latex) adhesive is generally used (see Patent Document 1, Patent Document 2, etc.).

  The resin concentration of the RFL adhesive solution used in the process of treating the reinforcing fabric cloth with an adhesive is generally as high as about 20%, and a large amount of this high concentration solution is attached. The woven fabric for reinforcing rubber immediately after impregnating with becomes a considerable weight of 1.5 times or more of its own weight. The rubber reinforcing woven fabric to which the adhesive liquid is adhered is then conveyed to a drying process, baked, wound up in a roll shape, and becomes an adhesive-treated rubber reinforcing woven fabric.

  Conventionally, the adhesive treatment of the woven fabric for rubber reinforcement is performed by dipping in which the adhesive liquid is attached by dipping in a dip bath. For example, the process is shown in FIG. That is, in FIG. 6, the adhesive liquid is stored in the dip bath tub (91), and the rubber reinforcing fabric (F) is passed through the dipping roll (92) provided in the dip bath tub to pass through the adhesive liquid. By passing and dipping, the adhesive liquid is adhered to the rubber reinforcing fabric. The rubber reinforcing woven fabric impregnated with the adhesive solution by dipping is pulled up by the mangle roll (93), transported to the drying step (6) under tension in the length direction, baked and wound up. It is wound up into a roll by a machine.

  In such a conventional adhesive treatment process, a large amount of the adhesive liquid adheres by passing through the dip bath (91) and is pulled upward in a heavy state. Takes in the warp direction. Here, when dipping a woven fabric that has extensibility in the weft direction and no extensibility in the warp direction (hereinafter referred to as weft-extended woven fabric), the warp direction is affected even if a large tension is applied to the warp direction. Therefore, even if pulled up by the mangle roll (93), it can be transported to the next drying step in a woven fabric state that hardly stretches in the warp direction.

  However, when dipping a woven fabric that is not stretchable in the weft direction and is stretchable in the warp direction (hereinafter referred to as warp stretch fabric), if a large tension is applied in the warp direction in the weft direction, Elongation occurs in the direction. Moreover, since the elongation in the warp direction occurs due to the rotational load of the dipping roll provided in the dip tub, the woven fabric pulled up from the dip tub is in a state of being considerably stretched in the warp direction and is supplied to the next drying process as it is. Then, since the baking is performed in the state stretched in the warp direction, the stretchability in the warp direction is diminished, and the woven fabric has a considerably low residual elongation. Therefore, in the conventional adhesion treatment method, the adhesive treatment cannot be performed while sufficiently maintaining the warp direction extensibility of the warp woven fabric.

  Because of such restrictions on the adhesive treatment method, all the industrially manufactured toothed belt reinforcing woven fabrics were weft stretch woven fabrics.

  The adhesive-treated rubber reinforcing woven fabric is then prepared into a woven fabric piece of a predetermined size, and then adhered to the tooth side surface (engagement surface) of the toothed belt and molded to form the tooth surface. (See Patent Document 1, Patent Document 2, and Patent Document 3). In the case of using a weft stretch woven fabric, the woven fabric weft direction is arranged in the belt longitudinal direction so that the woven fabric sufficiently extends in the belt longitudinal direction at the time of molding. Here, the woven fabric piece disposed so as to cover the surface of the tooth portion of the belt has a width (W) sufficient for the belt width and a length (L) sufficient for the length in the belt longitudinal direction (elongated). Shape). When the above-mentioned elongated woven fabric piece is prepared from the original fabric of the weft stretched woven fabric, it is elongated from the woven fabric fabric in the direction of the weft of the woven fabric (the width is the width W and the woven width is the length of the original fabric). It is necessary to. Moreover, since the length of the cut woven fabric piece is usually shorter than the above L, securing a predetermined length (L) by joining them is performed.

  Thus, conventionally, since the woven fabric for toothed belt reinforcement was manufactured from a weft-stretched woven fabric, it cannot be used simply by cutting the woven fabric for reinforcement, and further joined together. Needed, a piece of woven fabric with a joint was provided for reinforcement.

  However, connecting after cutting is not preferable in terms of work efficiency, and has been a problem in improving productivity. In addition, when there is a joint portion, the weave density of the woven fabric bonded to the tooth surface is partially different, and the reinforcing effect tends to be uneven, which has been a problem in quality improvement.

  In addition, when the adhesive treatment is performed by dipping the weft stretch woven fabric for rubber reinforcement, the woven fabric that passes through the drying process is tensioned in the length direction, so that it is sufficiently relaxed in the width direction. This is difficult, and stretchable wefts are baked in a state where a certain amount of tension is applied, and there is a problem that the residual elongation in the weft direction is reduced to some extent, and it is desired to further improve the residual elongation. It was.

Japanese Examined Patent Publication No. 7-81606 JP-A-8-312724 Japanese Patent Laid-Open No. 9-100909

  Therefore, the present invention solves the above-described problems of the prior art, and even in the case of warp stretch woven fabric, a sufficient amount of rubber adhesive can be adhered in a state where the stretchability in the warp direction is considerably maintained. The main object of the present invention is to provide an adhesive treatment method and apparatus capable of producing a woven fabric for warp-elongating rubber having a sufficient residual elongation in the warp direction.

  Another object of the present invention is to provide a warped belt reinforcing warp stretchable woven fabric which can omit the joining operation when preparing a woven fabric piece for reinforcing a toothed belt.

  In order to achieve the above object, the present invention according to claim 1 relates to a method for treating an adhesive for a woven fabric for rubber reinforcement, in a method for continuously treating an adhesive while transferring the woven fabric for rubber reinforcement. The rubber reinforcing woven fabric is gripped with the pins or clips at the left and right ends of the woven fabric, and then the adhesive liquid is attached to the surface of the rubber reinforcing woven fabric by spraying, sent to the drying process, and dried. To do.

  According to the second aspect of the present invention, adhesion of the adhesive in the above method is performed by a method in which an adhesive liquid is adhered to both surfaces of the woven fabric from above and below by transferring the woven fabric for rubber reinforcement in the horizontal direction. Further, according to the present invention of claim 3, the adhesion of the adhesive in the above method is performed by spraying on both surfaces of the woven fabric by spraying from both the left and right directions while transferring the woven fabric for rubber reinforcement in the vertical direction. It is performed by the method of adhering.

According to the fourth aspect of the present invention, after the drying in the above method, the right and left ends of the woven fabric are removed by pins or clips, and the treated woven fabric is rolled up.
According to a fifth aspect of the present invention, in the above method, a rubber-reinforced warp-elongated woven fabric having elongation characteristics in the warp direction is continuously passed through an adhesive treatment step to be subjected to an adhesive treatment.

  The present invention of claim 6 is an apparatus for continuously treating a rubber reinforcing woven fabric through an adhesive liquid application step and then a drying step to perform an adhesive treatment. An overfeed device for supplying, an imprinting device for gripping the left and right end portions of the rubber reinforcing fabric with pins or clips, and then a spray device for applying an adhesive liquid are sequentially arranged It is.

  The present invention of claim 7 is a method for producing a warp stretch warp woven fabric, which is bonded to a rubber reinforcing warp stretch fabric having stretch characteristics in the warp direction by the adhesive treatment method according to claim 1. A warp-elongated woven fabric for a toothed belt to which an agent is adhered and an adhesive is adhered to 5 to 20% by weight is produced.

  The present invention according to claim 8 is a warp-elongated woven fabric for a toothed belt, which is manufactured by the above-described manufacturing method, and has a warp direction elongation of 40% or more. It is what.

  According to the adhesive treatment method for a rubber reinforcing woven fabric according to the first aspect of the present invention, a sufficient amount of the adhesive for rubber is adhered even in the case of warp stretch woven fabric in a state that does not inhibit the stretchability in the warp direction. Therefore, a woven fabric for reinforcing a warp rubber having a sufficient residual elongation in the warp direction can be obtained. Further, a weft stretch woven fabric for rubber reinforcement having sufficient residual elongation in the transverse direction can be obtained by bonding the weft stretch woven fabric.

  And the warp-elongated woven fabric for toothed belts treated with the adhesive according to the present invention method can omit the joining work when preparing the woven fabric piece for reinforcing the toothed belt, It is possible to produce a reinforcing woven fabric piece without any.

  Moreover, according to the adhesive treatment method of claim 2 or claim 3, a sufficient amount of adhesive can be easily and uniformly adhered even in the case of a woven fabric having a large basis weight. Further, according to the method of claim 3, there is an advantage that the adhesive applied by spraying tends to be more uniform over the entire surface of the woven fabric.

  The adhesive treatment method and the adhesive treatment apparatus of the present invention will be described based on the embodiment shown in FIGS. FIG. 1 is a schematic view of an adhesive treatment process showing an embodiment of the adhesive treatment method of the present invention. 2-5 is the schematic which shows other embodiment of the process of spray-coating an adhesive liquid.

  FIG. 6 is a schematic view showing an adhesive treatment process according to the prior art. FIG. 7 is a schematic view showing a rubber reinforcing fabric cloth (roll-shaped roll).

  The woven fabric for rubber reinforcement to which the method of the present invention is applied is a woven fabric as shown in FIG. 7, and is an elastic rubber reinforcement that is extensible in the fabric length direction (direction of arrow C) using an extensible yarn for warp. There are also warp-elongated woven fabrics for rubber reinforcement that are extensible in the fabric width direction (in the direction of arrow D) using extensible yarns for wefts.

  In this unidirectionally stretchable woven fabric, as the stretchable yarn, for example, a crimped yarn obtained by crimping nylon fiber is used. As the yarn intersecting with this, a yarn that does not substantially stretch (non-stretch yarn) is used. For example, a filament yarn made of a synthetic resin such as nylon (substantially crimped). Not straight yarn) is used.

  The method of the present invention is suitable for the case where an adhesive is attached to a warp-stretched elastic fabric for rubber reinforcement that is stretchable in the fabric length direction (in the direction of arrow C) among such unidirectionally stretchable fabrics. It is.

  1 is applied to the warp-elongated woven fabric for rubber reinforcement by the process shown in FIG. 1 or, if necessary, the process shown in FIGS. The method of the present invention will be specifically described based on the production of warp-elongated woven fabric.

  In the method of the present invention, as shown in FIG. 1, a warp stretch fabric (F) is continuously supplied from a warp stretch fabric wound body (1) and moved in a predetermined direction at a constant speed via a roller. The moving woven fabric is coated with an adhesive solution through an overfeed device (2), an ear opening device (3), a printing device (4), and a spray device (5), and then passes through a drying step (6). It is dried by letting it last and wound up.

  Here, in the process from the overfeed device (2) to the spray device (5), the right and left end portions (ear portions) of the woven fabric (F) are held with pins or clips, and the pins or clips are controlled. The fabric (F) is moved by moving it at a different speed. Next, an adhesive liquid is sprayed from the spray device (5) onto the woven fabric moving in the direction of the arrow in FIG.

  The overfeed device (2) is a device for overfeeding the woven fabric transferred by the roller. For example, the overfeed device (2) feeds the woven fabric in contact with the rubber winding roller (21) actively driven by the inverter motor. A device that controls the overfeed rate by increasing the contrast of the running speed of the fabric can be used. Here, the overfeed rate (overfeed rate increment) is preferably in the range of 30% or less, and more preferably around 10% (about 5 to 20%).

  The ear opening device (3) is for extending the curling and bending of the right and left ends of the woven fabric (ear portion) so that the right and left ends of the woven fabric can be accurately gripped by pins or clips in the subsequent imprinting device (4). It is a device and is arranged immediately before the imprinting device (4). For example, a device is used that extends the curl or bend of the ear portion by feeding the woven fabric in contact with a plurality of scroll rollers (31) driven by a motor. In addition, this ear opening device (3) can be omitted in the case where there is no curling or bending at both ears of the woven fabric (F) supplied from the woven fabric wound body (1).

  The imprinting device (4) is a device that grips the right and left ends of the woven fabric with pins or clips. In the case of gripping with a pin, a device that pierces the pin at regular intervals in the fabric ear may be mentioned. Moreover, when making it hold | grip with a clip, the apparatus which pinches | interposes a fabric ear | edge part with the clip of an open state, closes and hold | grips a clip is mentioned. The grip means for the left and right ends of the woven fabric may be either a pin or a clip, but a pin that is point-clamped is preferable in order to perform uniform overfeed in the length direction.

  A chain structure may be used as a moving means for moving the pins or clips holding the right and left ends of the woven fabric at a constant speed. When the woven fabric is run in the horizontal direction, either a weft chain or a vertical chain may be used. However, when the woven fabric is run in the vertical direction, a vertical chain is preferred.

  As the imprinting device (4), for example, a fabric ear is sandwiched between a rubber roller with brush (41) driven by an inverter motor and a lower receiving roller (42), and the fabric is moved at the same speed as the overfeed device. Then, a device that pierces the pin from below (pinning) or clips from above and below (clipping) is used.

  The spray device (5) is a device for quantitatively spraying a liquid (adhesive liquid) containing an adhesive toward the surface of the woven fabric in which the ears are gripped and moved by pins or clips. A spray gun, for example a flat spray type airless spray gun, can be used. A two-fluid spray gun with air can also be used.

  Since the width dimension of the woven fabric for rubber reinforcement is generally as wide as 800 to 2000 mm, a plurality of spray guns are arranged in the width direction, and both ends of the spray pattern are overlapped so that the adhesive liquid is uniform over the entire width of the woven fabric. It is preferable that it is applied to. The spray gun is preferably used at a distance within 30 cm from the surface of the woven fabric. Moreover, the application pressure of the adhesive is preferably 0.3 MPa or more, and the application amount is preferably 0.1 L / min or more per spray gun. When the fabric weight of the rubber reinforcing fabric is large or when the running speed of the fabric is fast, it is preferable to increase the spray application pressure and adjust the coating amount in order to adhere the adhesive uniformly.

  It is preferable to adjust the application amount of the adhesive liquid to a desired level by adjusting the application pressure of the spray device (5), but after spraying a larger amount of adhesive than the desired level with the spray device (5), FIG. As shown in FIG. 2, it is also preferable to install a squeezing device (81) to squeeze out excess adhesive and adjust it to a predetermined application amount.

  This diaphragm device (81) has a structure in which two rollers are arranged in parallel, both rollers are connected by a gear, and are driven and rotated by an inverter motor at the same peripheral speed as the traveling speed of the woven fabric. Exemplified, in this case, excess adhesive is squeezed out as the woven fabric passes between the two rollers. The two rollers used in this squeezing device may be a combination of a steel roller and a steel roller that is arranged in parallel with the distance between the two rollers being 1.0 mm or less and rotated. Alternatively, a combination of a steel roller and a rubber roller may be used to rotate the rubber roller pressed against the steel roller with an air cylinder. In this case, since the pressing force of the rubber roll can be changed by adjusting the air pressure, it is easy to adjust to a predetermined coating amount.

  When the adhesive liquid is applied by the spray device (5), the weight of the adhesive liquid-attached woven cloth is heavier than 1.5 times the weight of the woven cloth itself, but moves at a constant speed while grasping both ears of the woven cloth. The woven fabric does not extend in the length direction and is conveyed to the next drying step (6).

  As shown in FIG. 1, the spray device (5) may be disposed only above the woven fabric so that the adhesive liquid is applied to the upper surface of the woven fabric. However, as shown in FIG. 3 and FIG. It is preferable to arrange the spray device (5) on both sides of the sandwich so that the adhesive liquid is applied to both surfaces of the woven fabric.

  In the case of FIG. 3, the rubber reinforcing woven fabric is run in the horizontal direction, and the adhesive liquid is simultaneously adhered to the both surfaces of the woven fabric by spraying from the upper and lower sides of the woven fabric. Thus, when it adheres to both surfaces by spraying, even when the fabric weight of a woven fabric is large, there exists an advantage which can impregnate a sufficient quantity of adhesive liquid in a woven fabric.

  In the case of FIG. 4, the rubber reinforcing woven fabric is run in the vertical direction upward, and the adhesive is simultaneously applied by spraying from the left and right sides of the woven fabric toward both surfaces of the woven fabric. In this way, when the woven fabric is adhered to both sides from the left and right sides by spraying, in addition to impregnating a sufficient amount of adhesive liquid, before the adhesive liquid impregnated in the woven fabric is conveyed to the drying process, the woven fabric The phenomenon of moving the width direction toward the center can be avoided, and the uniformity of adhesive adhesion in the woven fabric width direction can be further enhanced.

  As shown in FIG. 4, when spraying adhesive from left and right on a woven fabric that runs vertically upward, when the squeezing device (81) is installed, excess squeezed adhesive is applied to the surface of the woven fabric. It runs down and flows down. Therefore, as shown in FIG. 5, it is preferable to attach a scraper (82) to the lower portion of the squeezing device (81) to collect and discharge excess adhesive. Moreover, since the excess adhesive sprayed and applied from the spray device (5) flows down along the surface of the woven fabric, a scraper (82 ') is attached to the lower portion of the spray device (5), It is preferable to collect and discharge excess adhesive.

  The adhesive liquid applied to the rubber reinforcing woven fabric is an aqueous liquid containing an adhesive generally used for rubber reinforcing woven fabric. For example, a mixture of resorcin / formaldehyde initial condensate and rubber latex (referred to as RFL). An aqueous liquid containing an adhesive mainly composed of) is used. The concentration of the adhesive solution is generally used at about 10 to 30% by weight.

  The woven fabric to which a predetermined amount of adhesion is applied is dried by passing through the drying step (6) in a state where both ears of the woven fabric are gripped. At this time, the woven fabric that is gripped by both ends of the woven fabric and passes through the drying process is not tensioned in the woven fabric warp direction. The reduction in stretchability of the rubber is small, and the woven fabric for rubber reinforcement having a large warp direction residual elongation after the adhesion treatment is obtained.

  In addition, when bonding the weft stretch woven fabric for rubber reinforcement, after pinning or clipping the woven fabric ear, by gradually narrowing the rail to which the pin or clip moving chain is attached in the width direction, Since it can be in a sufficiently relaxed state in the width direction of the woven fabric, even if the adhesive liquid is applied by spraying and then transported to the drying process and baked, the reduction in stretchability in the weft extension direction is kept small. It is possible to obtain a weft stretch woven fabric for rubber reinforcement having a large residual elongation.

  The woven fabric that has passed through the drying step (6) is taken up into a roll by a winder after the pins at both ends are removed.

  In the case of a toothed belt woven fabric, the amount of the adhesive attached to the rubber reinforcing woven fabric is generally preferably 5 to 20% by weight in terms of solid content of the adhesive. Further, the elongation in the elongation direction is preferably 40% or more, particularly preferably 50 to 60%.

  According to the adhesive treatment method of the present invention, when applying the adhesive liquid to the rubber reinforcing woven fabric, after the woven fabric is imprinted to be gripped with pins or clips, the adhesive liquid is applied to the surface of the woven fabric by a spray device. Since it is uniformly spray-coated in the form of small particles, it is possible to apply an adhesive solution without causing warp elongation even in a warp woven fabric and transport it to a drying process. Furthermore, since it can be baked in a sufficiently relaxed state in the elongation direction in the drying step, the residual elongation after shrinkage by baking can be greatly improved.

  In addition, the rubber-stretched warp-elongated woven fabric bonded by such a method can improve productivity because a joint in the belt manufacturing process is unnecessary when used for reinforcing a toothed belt. . Furthermore, the rubber-stretched warp-elongated woven fabric treated with the adhesive according to the present invention has a residual stretch compared to the rubber-stretched warp-stretched woven fabric and rubber-reinforced weft-stretched woven fabric that have been treated with the dipping method according to the conventional method. The degree becomes large, and when it is stuck and molded on the meshing surface of the toothed belt, it is sufficiently stretched, and the durability of the toothed belt can be improved. Further, since the obtained toothed belt is reinforced with a rubber reinforcing woven fabric having no joint portion, the quality can be improved.

  Hereinafter, the present invention will be specifically described by way of examples.

[Example 1]
Nylon 66 false-twisted yarn is used as the warp, nylon 66 filament yarn is used as the weft, and is obtained by weaving into a plain weave by a normal method, and has a width of 800 mm and a basis weight of 305 g / m ² for rubber reinforcement. A cloth was used. The warp direction elongation of this woven fabric was 60%.

  This rubber-reinforced warp-elongated woven fabric was coated with an adhesive and dried by the adhesive treatment process shown in FIG. In this processing step, the overfeed device (2) includes a woven fabric brought into contact with a rubber winding roller (21) having a diameter of 150 mm that is actively driven by an inverter motor, and overfeed is performed by increasing the running speed of the woven fabric. A device for controlling the rate was used. Further, as the ear opening device (3), a device that stretches the curl and the bending of the ear portion by sequentially contacting the three scroll rollers driven by the motor and feeding the woven fabric was used. As the imprinting device (4), a fabric ear is sandwiched between a roller rubber roller (41) having a diameter of 220 mm driven by an inverter motor and a lower receiving roller (42) having a diameter of 110 mm, and at the same speed as the overfeed device. While moving the woven fabric, a pinning device was used to pierce the woven fabric ear from below. Further, a vertical chain was used to move the pin held by piercing the left and right ends of the woven fabric.

  In the adhesive liquid coating process, the woven fabric is run in the horizontal direction at a running speed of 3.0 m / min, the both ends of the woven fabric are pinned at an overfeed ratio increment of 10%, and then placed above the woven fabric. The spray gun was sprayed with an RFL adhesive solution having a concentration of 20%, and the wet pick-up was applied to the weight of the woven fabric at 150%.

  The spray application pressure during spray application was 0.3 MPa, and the spray application amount was 0.35 L / min. The spray gun uses T650033-SUS (flat spray type) manufactured by Spraying Systems Co., Ltd., and five spray guns are arranged in the width direction of the fabric so that the adhesive adheres uniformly to the entire width of the fabric. The both ends of the were overlapped. The distance between the spray gun and the woven fabric was 25 cm.

  The woven fabric in which the adhesive solution is uniformly applied to the surface of the woven fabric by spray coating is then transported to the drying process and baked at a baking temperature of 180 ° C. and a baking time of 3 minutes. The pin was removed and rolled up.

The residual elongation in the warp direction of the warp-stretched woven fabric for rubber reinforcement obtained by the adhesion treatment was 55%.
The residual elongation was obtained by cutting a sample having a width of 2.5 cm and a length of 40 cm by cutting from an adhesive-treated rubber-stretched warp-stretched woven fabric, marking the 100 mm intervals, and in a standard state (temperature 20 ± 2 ° C.). The relative humidity (65 ± 2%) was allowed to stand for 24 hours, and then subjected to a textile tensile tester to measure the length (Lmm) between marks at the time of cutting.
Residual elongation (%) = ((L-100) / 100) × 100

[Example 2]
The same procedure as shown in FIG. 1 was used to apply and dry the adhesive liquid using a rubber-reinforced warp-elongated woven fabric having a width of 800 mm and a weight per unit area of 305 g / m ² similar to that used in Example 1. However, the spray application of the adhesive liquid was performed under the following spray application conditions using the apparatus shown in FIG.

  A spray gun placed above and below the fabric is sprayed simultaneously with a 20% RFL adhesive solution onto the surface of the fabric so that the wet pickup is 175% of the weight of the fabric. Applied. The spray coating pressure during spray coating was 0.3 MPa, and the spray coating amount (total) was 0.70 L / min. The arrangement of the spray gun arranged above the woven fabric was the same as in Example 1, and the spray gun arranged below was also arranged in the same manner.

  The residual elongation in the warp direction of the warp-stretched warp woven fabric obtained by applying the adhesive solution in the same manner as in Example 1 and then drying it was 57% except that the spray coating was performed as described above.

[Example 3]
The same procedure as shown in FIG. 1 was used to apply and dry the adhesive liquid using a rubber-reinforced warp-elongated woven fabric having a width of 800 mm and a weight per unit area of 305 g / m ² similar to that used in Example 1. However, the spray application of the adhesive liquid is performed by using the apparatus shown in FIG. 4 that sprays both sides of the woven fabric from the spray guns arranged on the left and right sides of the woven fabric while the woven fabric is traveling vertically from bottom to top. The following spray coating conditions were used.

  A 20% concentration RFL adhesive solution was sprayed simultaneously onto the surface of the woven fabric by spray guns arranged on both the left and right sides of the woven fabric, and applied so that the wet pick-up was 175% with respect to the weight of the woven fabric. The spray coating pressure during spray coating was 0.3 MPa, and the spray coating amount (total) was 0.70 L / min. The arrangement of the spray gun on the surface of the woven fabric was the same as in Example 1.

  The residual elongation in the warp direction of the warp-stretched woven fabric for rubber reinforcement obtained by applying the adhesive solution in the same manner as in Example 1 and then drying it was 53%, except that spray coating was performed as described above.

[Comparative Example 1]
Nylon 66 false-twisted yarn is used as the warp, nylon 66 filament yarn is used as the weft, and is obtained by weaving into a plain weave by a conventional method, having a width of 800 mm and a basis weight of 280 g / m ² for rubber reinforcement. A cloth was used. The warp direction elongation of this woven fabric was 60%.

  This rubber-reinforced warp-elongated woven fabric was coated with an adhesive and dried by the conventional adhesive treatment process shown in FIG. In this case, the adhesive solution is applied by storing the adhesive solution in the dip bath tub (91), and passing the woven cloth through the adhesive solution through the dipping roll (92) provided in the dip bath tub. Done by law. Specifically, the woven fabric is passed through a dip bath containing 20% concentration RFL adhesive at a running speed of 1.0 m / min, and is pulled up by a mangle roll (93) (wet weight with respect to the weight of the woven fabric at the time of pulling up). Pickup 150%), then transported to the drying step, baked at a baking temperature of 180 ° C. and a baking time of 3 minutes, and then rolled up into a roll.

  The residual elongation in the warp direction of the weft stretch woven fabric for rubber reinforcement obtained by the adhesion treatment was 36%.

[Comparative Example 2]
Nylon 66 filament yarn is used as the warp yarn, nylon 66 false twisted yarn is used as the weft yarn, and the weft stretch weave for rubber reinforcement having a width of 1800 mm and a basis weight of 305 g / m ² is obtained by weaving into a plain weave by a normal method. A cloth was used. The degree of elongation in the weft direction of this woven fabric was 60%.

  By applying the same adhesive treatment process as in Comparative Example 1 to this weft-stretched woven fabric for rubber reinforcement, an adhesive solution was applied and dried by a dip method. Specifically, the woven fabric is passed through a dip bath containing 20% RFL adhesive at a traveling speed of 1.5 m / min and pulled up by a mangle roll (wet pickup 150% with respect to the weight of the woven fabric at the time of pulling up). Then, it was transported to a drying process, baked at a baking temperature of 180 ° C. and a baking time of 2 minutes, and then rolled up into a roll.

  The residual elongation in the weft direction of the weft stretch woven fabric for rubber reinforcement obtained by the adhesion treatment was 47%.

  Table 1 shows the working conditions in Examples 1 to 3 and Comparative Examples 1 and 2 and the residual elongation of the resulting treated woven fabric.

  As is clear from the results of Table 1 above, in the case of Examples 1 to 3 according to the method of the present invention, the obtained weft stretch woven fabrics for rubber reinforcement were the rubber reinforcement weaves of Comparative Examples 1 and 2 according to the conventional method. The residual elongation in the direction of elongation was higher than that of the cloth. From the above results, it was confirmed that the effects of the present invention were sufficiently obtained.

  The method of the present invention is suitable when a rubber adhesive is attached to a woven fabric having elongation in the warp direction. In particular, it is particularly effective as an adhesion treatment method for producing a rubber-reinforced warp-elongated woven fabric to be adhered to the meshing surface of a toothed belt.

It is process schematic which shows an example of the whole process which implements the adhesion processing method of this invention. It is a process schematic block diagram which shows another example of the adhesive liquid application process in this invention method. It is a process schematic block diagram which shows another example of the adhesive liquid application process in this invention method. It is a process schematic block diagram which shows another example of the adhesive liquid application process in this invention method. It is a process schematic block diagram which shows another example of the adhesive liquid application | coating process in this invention method. It is process schematic which shows the whole process which implements the conventional adhesion processing method. It is a schematic perspective view which shows the woven fabric for rubber reinforcement (roll-shaped winding body) processed by this invention method.

Explanation of symbols

1 Woven woven fabric for rubber reinforcement F Warp-elongated woven fabric C for rubber reinforcement Woven fabric length direction (warp direction)
D Woven cloth width direction (weft direction)
2 Overfeed device 21 Rubber winding roller 3 Ear opening device 31 Scroll roller 4 Imprinting device 41 Rubber roller with brush 42 Lower receiving roller 5 Spray device (spray gun)
6 Drying process 7 Treated woven fabric wound body 81 Drawing device 82 Scraper 91 Dip bathtub 92 Dipping roll 93 Mangle roll

Claims (8)

In the method of continuously treating the rubber reinforcing woven fabric while transferring the rubber reinforcing woven fabric, the rubber reinforcing woven fabric is gripped by pins or clips at the left and right ends of the woven fabric and then sprayed on the surface of the rubber reinforcing woven fabric. An adhesive treatment method for a woven fabric for rubber reinforcement, characterized in that an adhesive liquid is attached, sent to a drying step, and dried. 2. The adhesive treatment for a rubber reinforcing fabric according to claim 1, wherein the adhesive is applied to both surfaces of the woven fabric by spraying from the vertical direction while the rubber reinforcing woven fabric is transferred in the horizontal direction. Method. 2. The adhesive treatment for a rubber reinforcing fabric according to claim 1, wherein the adhesive is applied to both surfaces of the woven fabric by spraying from the left and right directions while the rubber reinforcing woven fabric is transferred in the vertical direction. Method. 2. The method of treating an adhesive for a rubber reinforcing fabric according to claim 1, wherein after the drying, the right and left ends of the woven fabric are removed from the pins or clips, and the treated woven fabric is rolled up. 2. The method for treating an adhesive for a rubber reinforcing fabric according to claim 1, wherein the rubber reinforcing woven fabric subjected to the adhesive treatment is a rubber reinforcing warp woven fabric having elongation characteristics in the warp direction. An apparatus for continuously applying an adhesive solution by passing an adhesive liquid application process and then a drying process on the rubber reinforcement fabric, and an overfeed apparatus for supplying the rubber reinforcement fabric to the adhesive liquid application process, An adhesive treatment apparatus, wherein an imprinting device for gripping left and right ends of a rubber reinforcing fabric with pins or clips, and then a spray device for applying an adhesive liquid are sequentially arranged. A warp-elongated warp woven fabric for a toothed belt, wherein an adhesive is attached to the warp-elongated woven fabric for rubber reinforcement having an elongation property in the warp direction by the adhesive treatment method according to claim 1. A method for producing a warp-elongated woven fabric for a toothed belt. A warp-elongated woven fabric for a toothed belt manufactured by the manufacturing method according to claim 7, wherein the warp direction elongation of the woven fabric is 40% or more. Woven cloth.

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