JP6997916B2 - Industrial textiles - Google Patents

Description

The present invention relates to an industrial woven fabric such as a papermaking dryer canvas, and specifically to an industrial woven fabric having a light emitting portion.

Industrial woven fabrics woven from warp and weft are widely used as belts in various machines. As an industrial woven fabric, it is used in many applications such as papermaking wire, press felt, and dryer canvas.

In industrial process belts, the operating status of machines is checked and controlled by sensors and the like. For example, Patent Document 1 states that in an industrial process belt, electrons of the first wavelength when excited by an energy source having a wavelength different from the first wavelength at a predetermined position on the surface or inside of the belt or fabric. It is described that a sensor that emits radiation is provided.

On the other hand, conventionally, it has been known to mix a fluorescent substance as a method for improving the visibility of the resin. For example, Patent Document 2 describes that a thermoplastic resin contains a phosphorescent fluorescent substance.

Japanese Unexamined Patent Publication No. 2000-11659 Japanese Unexamined Patent Publication No. 2009-215415

However, in the case of Patent Document 1, it is described that the sensor remotely monitors and controls the belt speed, the running condition such as meandering, the morphological change such as skewing / distortion, and the condition of the product transported on the belt. However, it requires large-scale equipment such as a detector, and the durability of the sensor is a weak point in the harsh papermaking environment of high temperature and high speed running. Further, in Patent Document 2, there is no study on using it in a papermaking site where the temperature and humidity are high.

In order to solve the above-mentioned conventional problems, the present invention provides an industrial woven fabric having a light emitting portion having high durability in a hot and humid environment.

The present invention is an industrial woven fabric including a woven fabric body in which warp and weft are woven, and the industrial woven fabric has one or more light emitting parts, and the light emitting part has 10 to 30% by mass of a light-storing agent. The present invention relates to an industrial woven fabric, which is composed of a phosphorescent resin composition containing 70 to 90% by mass of a transparent resin.

According to the industrial woven fabric of the present invention, it is possible to provide an industrial woven fabric having a light emitting portion having high durability in a high temperature and high humidity environment such as a papermaking site.

FIG. 1 is a photograph of a joint portion of an industrial woven fabric, FIGS. 1 (a) and 1 (b) show a joint portion having a warp loop seam structure, and FIG. 1 (c) shows a joint portion having a spiral seam structure. FIG. 2 is a schematic cross-sectional view illustrating the arrangement location of the light emitting portion in the paper machine.

In the present invention, the industrial woven fabric is a woven fabric for a paper making machine such as a papermaking dryer cambus (hereinafter, also simply referred to as “cambas”), a papermaking wire, a papermaking press belt, a conveyor belt for a cutter machine, and a belt press. Includes filter belts, general transport belts, general dryer belts, etc. used in various sludge and slurry dehydration machines such as dehydrators.

The woven fabric main body (for example, the canvas main body) may be a single woven fabric or a multiple woven fabric such as a double woven fabric and a triple woven fabric. Further, the weaving structure is not particularly limited, and may be, for example, any other structure such as plain weave, twill weave, satin weave or variable weave, or a mixed weave thereof, and the spiral streaks are joined by weft yarn assembly. It may be a combined spiral belt.

The industrial woven fabric (for example, canvas) may include a joint connecting both ends of the industrial woven fabric body. The joint is not particularly limited and may have, for example, a warp loop seam structure as shown in FIGS. 1 (a) and 1 (b), and a spiral as shown in FIG. 1 (c). It may have a seam structure. In the joint having the warp loop seam structure, for example, the weft is removed from both ends of the woven fabric body such as an endd cambus, and the exposed warp is folded back by removing the weft, and a part thereof is appropriately used. By forming a loop shape and knitting the folded warp into a woven fabric body such as a cambus, the warp loops formed at both ends of the woven fabric body such as a cambus are meshed with each other to form a common hole for the warp loop. It can be formed by inserting and connecting the connecting core wires. On the other hand, in a joint having a spiral seam structure, a spiral wire made of a synthetic resin monofilament is meshed with the warp loop, and a core wire for fixing the spiral wire is inserted into a common hole formed by the meshing to form a woven fabric body such as a canvas. It can be formed by engaging the spiral wires formed at both ends with each other and inserting a connecting core wire into the common hole of the spiral wires formed by the meshing to connect the spiral wires.

The phosphorescent agent means a substance having a property of absorbing light such as visible light and ultraviolet rays and emitting self-fluorescence in a dark place. By forming the light emitting portion with the phosphorescent resin composition containing the phosphorescent agent, it is possible to confirm the light emitting portion arranged at a predetermined position of the industrial woven fabric in a dim environment such as a papermaking environment.

The light emitting portion is not particularly limited, but may be provided in a line shape over the entire length of the widthwise end portion (also referred to as an ear portion) of the industrial woven fabric, for example. By providing a light emitting portion at the end in the width direction of the industrial woven fabric, the running state of the industrial woven fabric such as a canvas such as meandering and offset can be easily visually recognized. The thickness of the line-shaped light emitting portion is not particularly limited, and may be, for example, −0.5 to 2.0 mm, 0.0 to 1.0 mm, or 0.1 to 0. It may be 5 mm. The thickness of the light emitting portion is determined by using a thickness gauge (Sanko Electronics Laboratory Co., Ltd., model UNIBOY-M), and the knuckle adjacent to the top of the warp (hereinafter referred to as a knuckle) at the entanglement of the warp and weft of the woven fabric. The horizontal line connecting the tops of the fabric in the longitudinal direction of the fabric is measured in the thickness direction of the fabric, in other words, the 0 level on the surface of the fabric is used as a reference. That is, a thickness of -0.5 means that the phosphorescent resin composition permeates the inside of the woven fabric and is filled below the knuckle, and a thickness of 0.0 means that the phosphorescent resin composition is filled. It means that the object has penetrated into the fabric and is filled to the same level as the knuckle. The width of the line-shaped light emitting portion is not particularly limited, and may be, for example, 0.5 to 10 cm, 1.0 to 10 cm, or 1 to 2 cm.

The light emitting portion may be provided at a plurality of locations separated from the joint of the industrial woven fabric by a predetermined interval, for example. The joint part is weaker than the main body part. For example, in the case of the woven fabric structure shown in FIG. 1, the tension of the belt is supported by the main body portion with four warp yarns per unit, while the joint portion (joining loop) is supported by two warp yarns. Therefore, even if there is no problem in the usage condition (wear / heat deterioration) of the main body, there are many cases where the joint is damaged or damaged, and in the worst case, the joint is broken, so it is extremely important to inspect the joint. Normally, when inspecting a paper machine, it is troublesome to find the joint part, which is the most important (most damaged) part when inspecting a cambus in a dim environment, when a long belt with a total length of several tens of meters is set on multiple cylinder rolls. In addition, the scaffolding is narrow and dangerous, but by providing light emitting parts at multiple locations separated from the joint part of the industrial textile by a predetermined distance (hereinafter, also referred to as the light emitting part for joint confirmation), it is far away. The position of the joint can be easily grasped even from the inside, and the safety of the inspector is improved.

Specifically, for example, as shown in FIG. 2, in the paper machine 1, light emitting portions are emitted from the selvage portions at a plurality of locations separated from the joint portions 20 of the industrial fabric 10 installed on the cylinder roll 2 at regular intervals. When multiple 100s are arranged (for example, one at a distance of 20 m from the joint, two at a distance of 15 m, three at a distance of 10 m, four at a distance of 5 m, etc.), the target joint is By checking the number of light emitting parts such as which direction they exist or whether they exist nearby, the position of the joint can be easily grasped even from a distance, and the safety of the inspector is improved. The shape of the light emitting portion for confirming the joint is not particularly limited, and may be any shape including, for example, a triangle, a quadrangle, a circle, an ellipse, and the like in a plan view. The thickness of the light emitting portion for joint confirmation is not particularly limited, and may be, for example, −0.5 to 2.0 mm, 0.0 to 1.0 mm, or 0.1 to 0. It may be 5 mm.

The phosphorescent agent is not particularly limited, but is preferably an alkaline earth aluminate phosphorescent phosphor from the viewpoint of afterglow time and emission brightness. Examples of the alkaline earth aluminate phosphorescent phosphor include the general formula (1): M _(1-a) Al ₂ O _(4-a) · Z _b · Y _c , or the general formula (2): M. _(4-a) Alkaline earth aluminate phosphorescent phosphor represented by Al ₁₄ O _(25-a) · Z _b · Y _c can be used. In the general formulas (1) and (2), M represents one or more metals selected from the group consisting of calcium, barium, strontium, and magnesium. Further, a is a rational number in the range of 0.33 to 0.60. Further, Z represents europium as an activator, and b is in the range of 0.001 to 10 or less in terms of mol% with respect to the metal element represented by M. Further, Y represents at least one element selected from the group of lanthanoids other than europium, which is a coactivator, and c is in the range of 0 to 10 in mol% with respect to the metal element represented by M. Examples of lanthanoids other than europium include neodymium, samarium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and the like.

Examples of the alkaline earth aluminate phosphorescent phosphors described above include G series, GLL series, BG series and BGL series manufactured by Nemoto & Co., Ltd., B101 series, B102 series and B105 series manufactured by Tail Navi Co., Ltd. Commercially available products may be used.

The phosphorescent agent may be used alone or in combination of two or more.

The transparent resin is preferably colorless and transparent from the viewpoint of enhancing the light emission of the phosphorescent agent in the light emitting portion. From the viewpoint of high temperature durability, the transparent resin preferably has heat resistance, and for example, silicone resin, polyester resin, epoxy resin, and polyimide resin can be used, and silicone resin is more preferable. As the silicone resin, for example, a commercially available product such as "Super XG Clear" (main component acrylic modified silicone) manufactured by Cemedine Co., Ltd. can be used.

The light emitting portion may be composed of a phosphorescent resin composition containing 10 to 30% by mass of a light-storing agent and 70 to 90% by mass of a transparent resin. In the phosphorescent resin composition, when the content of the phosphorescent agent is less than 10% by mass, the brightness of the light emitting portion is low and it becomes difficult to confirm the light emitting portion. On the other hand, if the content of the phosphorescent agent exceeds 30% by mass, that is, the content of the transparent resin is less than 70% by mass, it becomes difficult to impart durability to the phosphorescent agent, and it becomes difficult to impart durability to the phosphorescent agent in a hot and humid environment. It will deteriorate. From the viewpoint of increasing the afterglow brightness of the light emitting portion, the content of the phosphorescent agent is preferably 15% by mass or more, and more preferably 20% by mass or more. Further, from the viewpoint of enhancing the moist heat durability of the phosphorescent agent, the content of the transparent resin is preferably 80% by mass or more, more preferably 85% by mass or more.

A light emitting portion can be formed by applying the phosphorescent resin composition to a predetermined portion of an industrial woven fabric and drying it. The phosphorescent resin composition can be obtained, for example, by mixing a phosphorescent agent and a transparent resin. The coating method is not particularly limited, and for example, it can be coated with a brush, a roller, or the like. Before coating, the phosphorescent resin composition may be diluted with a solvent such as thinner. The drying conditions are not particularly limited, but for example, the temperature may be in the range of 5 to 130 ° C., and the time may be 1 to 60 minutes.

The material of the warp or weft woven from the woven fabric body is not particularly limited, and is preferably one or more selected from the group consisting of polyethylene terephthalate, polyamide, polyphenylene sulfide, polyetheretherketone and the like, from the viewpoint of durability. Therefore, polyethylene terephthalate is more preferable. The same can be said for spiral wires and connecting core wires. Further, both the warp and weft can be a monofilament yarn made of synthetic resin, a multifilament yarn made of synthetic resin, or the like.

The number of yarns to be driven per unit length of the woven fabric body is not particularly limited, but the warp yarns are 25 to 130 yarns / 1 inch (25.4 mm) and the weft yarns are 10 to 80 yarns / 1 inch (25.4 mm). ) Is preferable. This makes it possible to improve wear resistance while maintaining surface uniformity.

In the present invention, the cross-sectional shape and wire diameter of the warp or weft are not particularly limited, but in the case of a circular cross section, the diameter is preferably 0.2 to 1.2 mm, and in the case of a flat cross section, the long side is It is preferably 0.4 to 1.2 mm, and the short side is preferably 0.2 to 0.6 mm. As a result, it is possible to improve the wear resistance while maintaining the uniformity of the surface, balance the joint, and form a joint having a smooth surface.

Hereinafter, the present invention will be described in detail with reference to Examples. However, the present invention is not limited to these examples.

(Example 1)
First, a warp made of polyethylene terephthalate (PET) monofilament (flat cross section, short side: 0.28 mm, long side: 0.56 mm) and a warp made of PET monofilament (circular cross section, diameter 0.60 mm) are woven. A woven fabric with a 1/1 twill structure was obtained. The number of threads to be driven per unit length of the woven fabric was 48.5 threads / 1 inch (25.4 mm) for the warp threads and 41.0 threads / 1 inch (25.4 mm) for the weft threads. Next, a transparent silicone resin ("Super XG Clear" manufactured by Cemedine Co., Ltd.) so that the width becomes 1.5 cm along the total length of the end in the width direction of the obtained fabric (length 15 cm, width 6 cm). , Main component acrylic modified silicone) 90% by mass, alkaline earth aluminate phosphorescent phosphor (alkaline earth aluminate urobium, "B101-60" manufactured by Tail Navi Co., Ltd., emission peak: 490 nm, emission color: blue A phosphorescent resin composition consisting of 10% by mass (average particle diameter 60 μm) is applied to the surface of the fabric from the width direction end. A masking tape is attached to the inside in the width direction excluding the width, and the mixed resin (composition) is applied to the width direction end. I hung it on the part and spread it with a spatula. Then, the excess resin in the thickness direction was scraped off with a scraper, applied by a method of peeling off the masking tape, and naturally left to dry at 25 ° C. for 30 minutes to provide a light emitting portion (thickness 0.5 mm).

(Example 2)
In the phosphorescent resin composition, light emission is carried out in the same manner as in Example 1 except that the blending amount of the transparent silicone resin is 85% by mass and the blending amount of the alkaline earth aluminate phosphorescent phosphor is 15% by mass. A woven fabric having a portion was produced.

(Example 3)
In the phosphorescent resin composition, light emission is carried out in the same manner as in Example 1 except that the blending amount of the transparent silicone resin is 80% by mass and the blending amount of the alkaline earth aluminate phosphorescent phosphor is 20% by mass. A woven fabric having a portion was produced.

(Example 4)
In the phosphorescent resin composition, light emission is carried out in the same manner as in Example 1 except that the blending amount of the transparent silicone resin is 70% by mass and the blending amount of the alkaline earth aluminate phosphorescent phosphor is 30% by mass. A woven fabric having a portion was produced.

(Comparative Example 1)
A woven fabric was produced in the same manner as in Example 1 except that the light emitting portion was not provided.

(Comparative Example 2)
A woven fabric was produced in the same manner as in Example 1 except that the transparent silicone resin was applied to the end portion in the width direction of the woven fabric.

(Comparative Example 3)
Examples of the example except that a resin composition in which the amount of the transparent silicone resin is 99% by mass and the amount of the alkaline earth aluminate phosphorescent phosphor is 1% by mass is used as the phosphorescent resin composition. A woven fabric was produced in the same manner as in 1.

(Comparative Example 4)
Examples of the example except that a resin composition in which the amount of the transparent silicone resin is 95% by mass and the amount of the alkaline earth aluminate phosphorescent phosphor is 5% by mass is used as the phosphorescent resin composition. A woven fabric was produced in the same manner as in 1.

The brightness of the woven fabrics of Examples 1 to 4 and Comparative Examples 1 to 4 was measured as follows. Further, the woven fabrics of Examples 1 to 4 and Comparative Examples 1 to 4 were subjected to moist heat deterioration as described below, and then the brightness was measured as follows.

(Measurement of brightness)
The sample was left at room temperature (20 ± 5 ° C) under indoor fluorescent lighting (9350 cd / m ² ) for 30 minutes, then turned off, and at room temperature (20 ± 5 ° C), a luminance meter (Konika Minolta Co., Ltd.) The brightness was measured using CS-100A ”). The results are shown in Table 1 below.

(Measurement of brightness after wet heat deterioration test)
The sample was placed in an autoclave (“CLS-32S”, Alp Co., Ltd.) containing a required amount of water, and left at 120 ° C. under a condition of about 2 kgf / cm ² for 100 hours to be deteriorated by steam. After that, it was left at room temperature (20 ± 5 ° C) under indoor fluorescent lighting (9350 cd / m ² ) for 30 minutes, then turned off, and at room temperature (20 ± 5 ° C), the luminance meter (color manufactured by Konika Minolta Co., Ltd.) was turned off. The luminance was measured according to JIS Z 9107 using a luminance meter "CS-100A").

As can be seen from the results in Table 1 above, in Examples 1 to 4 having a light emitting portion composed of a phosphorescent resin composition containing 10 to 30% by mass of a light-storing agent and 70 to 90% by mass of a transparent resin, the temperature and humidity were high. The durability (luminance value) of the light emitting part is high even in the environment, and the light emitting part can be visually confirmed. On the other hand, when the content of the light-storing agent was less than 10% by mass, the durability of the light-emitting part was low in a high-temperature and high-humidity environment, and the light-emitting part could not be visually confirmed.

1 Paper machine 2 Cylinder roll 10 Industrial woven fabric 20 Joint part 100 Light emitting part

Claims (5)

It is an industrial woven fabric that includes the main body of the woven fabric that weaves warps and wefts.
The industrial woven fabric has one or more light emitting parts, and the light emitting part is composed of a phosphorescent resin composition containing 10 to 30% by mass of a phosphorescent agent and 70 to 90% by mass of a transparent resin. ,
The transparent resin is an industrial woven fabric characterized by being a silicone resin . The industrial woven fabric according to claim 1, wherein the phosphorescent agent is an alkaline earth aluminate phosphorescent fluorescent substance. The industrial woven fabric according to claim 1 or 2 , wherein the light emitting portion is provided at an end portion in the width direction of the industrial woven fabric. The industrial woven fabric includes a joint that connects both ends of the woven fabric body, and the light emitting portion is provided at a plurality of locations separated from the joint of the industrial woven fabric by a predetermined distance, according to any one of claims 1 to 3 . Industrial fabrics described in. The industrial woven fabric according to any one of claims 1 to 4 , wherein the industrial woven fabric is a papermaking dryer canvas.

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