JP6059951B2 - Protective cover for painting robot - Google Patents

Description

  The present invention relates to a protective cover for a painting robot that covers a painting robot that performs spray coating of a liquid paint.

  Liquid paint is sprayed on and painted on automobiles, motorcycles and automobile parts. In general, when spraying a liquid paint, it is desired to obtain a desired color and gloss with a uniform coating thickness. For this purpose, the painting work is performed indoors or in a booth in a clean environment. Furthermore, the paint mist is reduced as much as possible in the room or booth so as not to re-adhere to the object to be coated.

  Here, a painting robot for spraying and painting paint is installed in the painting work place, and paint mist is likely to adhere to the painting robot. The paint adhering to the painting robot falls off and reattaches to the object to be coated, causing a stain and causing a painting error. In addition, paint adhesion due to paint mist in the entire interior of the painting booth is also a major issue in maintaining the environment.

  Therefore, conventionally, the body and arm of the painting robot and the tip of the painting gun (gun) provided at the tip of the arm have been covered with a protective cover sewn with fabric (see Patent Document 1). Since the cloth protective cover is a material that is relatively easy to expand and contract, it can follow the rotation and swinging motion of the robot.

  Further, in Patent Document 2, the inventor of the present application has proposed that a protective cover is impregnated with a semi-solid composition and adhered. By impregnating and adhering a semi-solid composition with high paint compatibility to the protective cover, the adsorbability of the paint mist is improved, and the protective cover can be prevented from being broken when the painting robot is operated, and the paint mist can be diffused. It is possible to prevent or reduce the adhesion of the paint to the surface to be painted and the coating robot itself, and the adhesion of the paint to the indoor wall surface, floor surface or the like.

WO2007 / 122717 JP 2011-183396 A

However, in the painting booth where painting is performed, paint mist and organic solvent volatile components exist. In painting booths where painting robots are installed, there is no possibility of some kind of ignition such as static electricity. In the protective cover described in Patent Document 2, there is a concern that the flame generated due to the above-mentioned causes may ignite, which may hinder the safety in the painting booth.
Therefore, it has been desired that the protective cover that encloses the painting robot is flame retardant that can emphasize safety.

  This invention is made | formed in view of this situation, and makes it a subject to provide the protective cover for coating robots which is excellent in the adsorptivity of paint mist, and has a flame retardance performance and a dust prevention performance.

The protective cover for a coating robot according to the present invention comprises a fabric made of stretchable knitted fabric or woven fabric knitted with a filament yarn made of synthetic resin, and a semi-solid flame retardant or semi-solid flame retardant impregnated on the fabric. A coating comprising a mixture of a flame retardant and a semi-solid composition;
The semi-solid flame retardant contains a gelling agent.

According to the present invention, a semi-solid flame retardant or a mixture of a semi-solid flame retardant and a semi-solid composition is impregnated and adhered to a fabric made of knitted fabric or woven fabric. The For this reason, even if a spark is generated from a painting robot or the like due to any ignition, heat generation or static electricity generation in the painting booth, the protective cover can be prevented from burning, and the safety of the painting site can be improved.

The coating was impregnated attached to fabric, semi-solid flame retardant or comprises a mixture of semi-solid flame retardant and semi-solid compositions. For this reason, dust etc. are hard to adhere to the protective cover itself, and the dustproof effect is great. Therefore, dust is not brought in when the protective cover is taken into the painting environment such as in a booth, and the cleanness of the painting environment can be maintained.

Further, the semi-solid flame retardant or the mixture of the semi-solid flame retardant and the semi-solid composition has high compatibility with the paint. For this reason, the amount of absorption of the mist-like paint that floats in the paint environment is greatly increased, and the purification of the paint environment can be dramatically improved. Further, the attached paint is difficult to drop off, and the paint environment can be maintained at a high cleanliness.

In addition, because of the slipperiness possessed by the semi-solid flame retardant or the slipperiness possessed by the mixture of the semi-solid flame retardant and the semi-solid composition, friction due to contact between the protective cover and the surface of the coating robot is suppressed, The painting robot can move smoothly, rotate, and move linearly, and the paint can be prevented from falling off.

Further, the coating robot or the like protective cover of the present invention, the coating material is impregnated adheres to fabric made of knitted or woven fabric has Nde contains at least semi-solid flame retardants. Semi-solid flame retardant, unlike solid flame retardant, per se and has a semi-solid. For this reason, even a semi-solid flame retardant alone has good lubricity and is difficult to adhere dust. In addition, the friction with the painting robot is suppressed, the movement of the painting robot becomes smooth, and the paint that adheres to the protective cover is prevented from falling off. That is, it is possible to realize both of these properties and flame retardancy due to the semi-solid state.

On the other hand, when the solid flame retardant is mixed with the applied material and adhered to the fabric, the solid flame retardant cannot be impregnated and firmly adhered to the fabric, and will easily fall off the fabric. On the other hand, it becomes a dust field, not only does it not meet its purpose, but also loses its flexibility and slipperiness. For this reason, it becomes difficult to achieve both flame retardancy and lubricity.

Further, a semi-solid flame retardant or a coating containing a mixture of a semi-solid flame retardant and a semi-solid composition is impregnated and adhered to the dough. For this reason, the coated material adheres to the fabric in a state of entering not only the surface of the fabric but also the inside. Therefore, it is difficult for the coated material to fall off the dough.

  Further, in the present invention, the fabric impregnated with the coating is made of a knitted fabric or a woven fabric that can expand and contract itself. For this reason, the protective cover follows the operation of the robot flexibly and is not easily torn. Therefore, the number of replacements can be reduced, and the equipment maintenance cost during painting can be suppressed as a whole.

In the protective cover for a painting robot of the present invention, a semi-solid flame retardant or a mixture of a semi-solid flame retardant and a semi-solid composition is impregnated and adhered to a cloth. For this reason, since it has excellent flame retardancy, adsorbability of paint mist, etc., and has slipperiness, it has good mounting properties and is not easily broken during operation of the painting robot.

It is a perspective view of the painting robot coat | covered with the protective cover which concerns on this invention. It is a perspective view of the protective cover which concerns on this invention. It is sectional drawing of the filament which comprises the cloth | dough of the protective cover which concerns on this invention.

  As shown in FIG. 1, a protective cover 1 for a painting robot according to the present invention is used by coating the surface of a painting robot 2. Among the painting robots 2, it is preferable to cover an arm portion 21 protruding from the main body portion 20 and a coating gun (gun) 22 which is a paint blowing portion at the tip of the arm. This is because, among the painting robot 2, the arm portion 21 and the painting gun (gun) 22 are particularly portions where the paint mist easily adheres. The arm portion 21 and the coating gun 22 are portions that swing and rotate, but the protective cover 1 is composed of a flexible stretchable material such as a knit knitted fabric. There is nothing to do. In FIG. 1, the arm portion 21 is covered with three protective covers 1 with the joint portions 25 and 26 interposed therebetween, but the arm portion 21 as a whole may be covered with one protective cover 1. An expandable bellows portion 23 is interposed between the arm portion 21 and the coating gun 22. For this reason, it is better not to cover the bellows portion 23 with the protective cover 1.

  As shown in FIGS. 1 and 2, the protective cover 1 may have a shape along the surface shape of the painting robot 2, for example, a cylindrical shape. When the coating robot 2 is operated, the protective cover 1 can be prevented from being caught by the arm portion 21 and the like, and there is no obstacle to spraying the paint onto the object to be coated.

  The fabric of the protective cover is made of a stretchable knitted fabric or woven fabric knitted with synthetic resin filament yarn. Among these, a knitted fabric is preferable, and a knitted fabric knitted with filament yarn is preferable. The knitted fabric is preferably a tentacle knitting in which S / Z twists are alternately knitted. The filament yarn may be a multifilament in which a plurality of filaments are bundled into one yarn, but may be a monofilament in which one filament is a single yarn. The filament yarn is made of a synthetic fiber, and for example, a thermoplastic synthetic resin such as nylon, polyester, polypropylene, acrylic, or vinylon can be used. Among these, nylon and polyester are preferable in terms of properties such as strength and stretchability.

  The fabric may be seamless and knitted into a cylindrical shape, or may be one obtained by appropriately cutting and sewing a seamlessly knitted cylindrical fabric. For example, as shown in FIG. 2, when the diameter of the protective cover 1 changes in the longitudinal direction, the seamless cylindrical fabric is cut into a flat surface, cut into a predetermined size, and then the longitudinal side 1a. They may be sewn together, or the end portions 1b in the transverse direction may be sewn together to be integrated.

The protective cover for the painting robot is formed by impregnating a fabric made of knitted fabric or woven fabric with an applied material. Coated product is semi-solid flame retardant or comprises a mixture of semi-solid flame retardant and semi-solid compositions. As shown in FIG. 3, the coated material 3 is not only attached to the surface of the filament 4 of the filament yarn constituting the fabric, but also impregnated inside. In this case, it is possible to prevent the coated material from impregnating and adhering to the fabric and dropping off from the fabric.

  The applied product is an ointment-like semi-solid. An ointment-like semi-solid coating has the property of spreading into a thin film and being impregnated when applied to a dough. The coated product may be impregnated and adhered to both the front and back surfaces of the fabric, or may be impregnated and adhered only to one side.

  It is preferable that the dough to which the coating material is impregnated and adhered is kept in a wet state. In this case, the slipperiness of the fabric can be maintained. Therefore, the paint adhering to the protective cover can be prevented from dropping for a long period of time, and the movement of the painting robot can be kept smooth.

When the mass of the dough is 100 parts by mass, the adhesion amount after drying of the coated product is preferably 10 to 100 parts by mass, and preferably 40 to 70 parts by mass. In this case, the protective cover has flame retardancy and is easy to adsorb the paint, and has good attachment properties, and can prevent the paint from dropping off. In addition, when the adhesion amount of a coating material exceeds 100 mass parts, the adsorption amount of a coating material is saturated and the effect corresponding to it cannot be expected.
The amount of adhesion here refers to the amount of adhesion after the solvent is removed when the coating contains a solvent. The adhesion amount of the coated material is measured after the coated material is dried, heated or cooled.

Semi-solid flame retardants, when impregnated adhering to fabric made of knitted or woven fabric, a flame retardant exhibiting a semi-solid. Semi-solid flame retardants are materials that suppress, significantly reduce or retard the spread of flame when impregnated in a fabric. The semi-solid flame retardant has a certain degree of flame retardancy when it is impregnated and adhered to the fabric, for example, under the JIS L 1091D method, melted by the proximity of a flame and burned up to 3 times. be able to.

Since the semi-solid flame retardant further exhibits a semi-solid state, it has high lubricity. For this reason, friction caused by contact between the protective cover and the surface of the painting robot is suppressed, the movement of the painting robot is smoothed, and the paint is prevented from falling off.

A semi-solid composition is a composition that exhibits a semi-solid state when impregnated and adhered to a dough. A semi-solid composition exhibits a semi-solid state by impregnating and adhering to a cloth together with a semi-solid flame retardant , and has high lubricity. For this reason, friction caused by contact between the protective cover and the surface of the painting robot is suppressed, the movement of the painting robot is smoothed, and the paint is prevented from falling off.

The semi-solid flame retardant may be a phosphorus flame retardant, a halogen flame retardant alone, or a mixture of a phosphorus flame retardant and a halogen flame retardant, or may contain a gelling agent. good. As the phosphorus-based flame retardant, phosphate esters and condensed phosphate esters are preferable. As the halogen flame retardant, chlorinated paraffin, halogen-containing phosphate ester, and halogen-containing condensed phosphate ester are preferable. These flame retardants are impregnated and adhered to the dough, and then heated and cooled to form an ointment-like semi-solid composition.

When the flame retardant composition is a liquid or a fluid having high fluidity, it may have a gelling agent as well as the flame retardant. As a result, the liquid or fluid semi-solid flame retardant gels and impregnates and adheres to the fabric as a thin film-like semi-solid substance.

  Examples of phosphorus-based flame retardants that can be used include phosphate esters and condensed phosphate esters. Examples of the phosphate ester include 1 selected from 1,3-phenylenebis (2,6-dixylenylphosphate), 1,4-phenylenebis (2,6-dixylenylphosphate), and triphenylphosphate. It is good to consist of more than seeds. The condensed phosphate ester may be composed of one or more selected from the group of bisphenol A bis (diphenyl phosphate) and resorcinol bis (diphenyl phosphate).

  The halogen-based flame retardant is preferably composed of, for example, one or more selected from halogenated paraffin, halogen-containing phosphate ester, and halogen-containing condensed phosphate ester. Examples of the halogenated paraffin include chlorinated paraffin and brominated paraffin. As the halogen-containing phosphate ester and the halogen-containing condensed phosphate ester, for example, those obtained by halogen substitution of hydrogen groups contained in the above-mentioned phosphate ester and condensed phosphate ester can be used.

  Gelling agents include, for example, castor oil, 1,2-hydroxystearic acid, sebacic acid, dibenzylidene-D-sorbitol, hydroxystearic acid ester wax, hydroxy fatty acid amide wax, amino acid derivatives and other low molecular compounds, It is preferable to consist of one or more selected from the group of polymer compounds such as dextrin derivatives.

The semi-solid flame retardant preferably contains two or more types of phosphorus flame retardants. Some phosphorus-based flame retardants exist as liquids or solids alone. In that case, it is difficult to form a semisolid composition with a single phosphorous flame retardant. Therefore, for example, a gelling agent is added to a room temperature liquid phosphorus flame retardant, a room temperature liquid phosphorus flame retardant and a room temperature solid phosphorus flame retardant, a mixture thereof, or a room temperature liquid phosphorus flame retardant. By doing so, an ointment-like semi-solid state can be obtained.

Similarly, a phosphorous flame retardant and a halogen flame retardant may be mixed to form a semi-solid flame retardant . For example, when either one of the phosphorus-based flame retardant and the halogen-based flame retardant is a room temperature liquid and the other is a room temperature solid, a gelling agent is further added to the mixture obtained by mixing the two or the room temperature liquid flame retardant. Thus, an ointment-like semi-solid state can be obtained.

Any of the phosphorus-based flame retardant and the halogen-based flame retardant listed above can be used together with the gelling agent. Moreover, even if it is a flame retardant which is not enumerated above, a semi-solid flame retardant can be comprised with a gelatinizer.

When the mass of the semi-solid flame retardant containing the flame retardant and the gelling agent is 100% by mass, the mass ratio of the gelling agent is preferably 0.1% by mass or more and 15.0% by mass or less. In this case, a sufficient amount of the semi-solid flame retardant can be impregnated and adhered to the fabric while the solid flame retardant is sufficiently dissolved in the solvent.

The semi-solid flame retardant preferably contains a phosphorus flame retardant and a halogen flame retardant. This is due to the difference in the flame retardant mechanism between the phosphorus-based flame retardant and the halogen-based flame retardant. Halogen flame retardant generates non-flammable gas during combustion and exerts its effect by blocking oxygen in the air, while phosphorus flame retardant thermally decomposes during combustion, causing a strong dehydration action, By promoting the formation of the carbonized layer, the effect of blocking oxygen in the air is exhibited. Therefore, when the semi-solid flame retardant has both a phosphorus flame retardant and a halogen flame retardant, an improvement in flame retardant effect can be expected as compared with the case where a phosphorus flame retardant or a halogen flame retardant is used alone. .

To make a semi-solid flame retardant into a semi-solid, for example, a room temperature solid flame retardant and a room temperature liquid flame retardant are mixed in a semi-solid state, and then a room temperature liquid flame retardant or a room temperature liquid flame retardant A gelling agent is mixed with a mixture of a flame retardant and a room temperature solid flame retardant to form a semi-solid. When the single flame retardant is semi-solid, the flame retardant alone can be used as a semi-solid flame retardant .

  The semi-solid composition may be an amorphous ointment-like substance, for example, an amorphous ointment-like substance separated from petroleum. For example, it preferably consists of petrolatum. Petrolatum is a mixture of hydrocarbons consisting mostly of paraffin. Petrolatum has good compatibility with oil-based paints and water-based paints, and is particularly highly compatible with oil-based paints. For this reason, it is easy to adsorb the oil-based paint mist, and can also prevent dropping. In addition, although polyethylene glycol may be impregnated and adhered to the cloth as a semi-solid composition, the paint adherence is lower than that of petrolatum or petrolatum. In particular, petrolatum has higher compatibility with oil-based paints than polyethylene glycol. For this reason, as the semisolid composition impregnated and adhered to the dough, petrolatum or petrolatum having high adhesion of the oil paint is preferable as the semisolid composition impregnated and adhered to the cloth.

  The petrolatum of the semisolid composition used in the present invention is an oily semisolid wax and is dark green petrolatum, green petrolatum, red petrolatum, amber petrolatum, light amber petrolatum, snow or white petrolatum depending on the degree of purification. Examples include petroleum jelly and the like. Among these, white petrolatum or petrolatum having a high degree of purification is more preferable from the commercial value. Examples of white petrolatum or petrolatum include PROTOPET manufactured by Sonebon, White Petrolatum manufactured by Penleco, and the like.

  Among petrolatum, petrolatum is particularly unscented and non-irritating. In addition, it will not be spoiled by sunlight or moisture. For this reason, workability is good and a protective cover can be used over a long period of time. In addition, when petrolatum is used, the paint adhering to the protective cover becomes non-drying, and the paint does not fall off and does not adhere to the robot and is adsorbed to the protective cover. For this reason, the fall of the coating material adhering to a protective cover can be suppressed effectively.

  The melting point of petrolatum is 30 to 65 ° C, more preferably 38 to 60 ° C.

  As a method for impregnating and attaching petrolatum to the dough, for example, it is preferable to disperse and emulsify petrolatum in water, impregnate the dough into the dough, and then evaporate water to allow the petrolatum to impregnate and adhere to the dough. In this case, petrolatum can be impregnated and adhered to the dough without using an organic solvent. Therefore, it is desirable that the working environment is good and that cutting, sewing, and the like have already been performed.

  The semi-solid composition is preferably composed of petrolatum alone or a mixture of petrolatum and polyethylene glycol. Polyethylene glycol is a polymer compound (polyether) having a structure in which ethylene glycol is polymerized, and is soluble in water, methanol, benzene, and dichloromethane. Unlike polyethylene glycol, a mixture of petrolatum and polyethylene glycol is highly compatible with both oil-based paints and water-based paints. Therefore, both oil-based paints and water-based paints are easily adsorbed, and the paint can be prevented from dropping off.

  The polyethylene glycol mixed with the petrolatum is preferably one having a polymerization degree of 300 to 20000, specifically, polyethylene glycol 200, 300, 400, 600, 1000, 1540, 4000, 6000, 20000, etc. can be used. Two or more kinds of polyethylene glycol are combined and dissolved in water so that the melting point is 30 to 65 ° C. to obtain an aqueous polyethylene glycol solution.

  When the semi-solid composition is composed of a mixture of petrolatum and polyethylene glycol, the blending mass ratio of petrolatum and polyethylene glycol is preferably 20:80 to 80:20, and more preferably 40:60 to 60 : 40 is desirable. In this case, since the mixture becomes highly compatible with both the oil-based paint and the water-based paint, both the oil-based paint and the water-based paint are easily adsorbed, and the paint can be prevented from falling off.

The coated material impregnated and adhered to the dough only needs to contain at least a semi-solid flame retardant . Even a semi-solid flame retardant alone has many functions such as paint and dust adhesion prevention function, paint adsorption, drop-off prevention function, cover tear prevention function, and ease of installation due to slipperiness. By using together with the semi-solid composition, it is possible to further improve the adsorptivity and attachment workability of the paint mist.

The coated material impregnated and adhered to the knitted fabric or woven fabric is made of a semi-solid flame retardant or a mixture of a semi-solid flame retardant and a semi-solid composition. When the coating amount is 100% by mass, the blending ratio of the semi-solid flame retardant is, for example, preferably 10% by mass to 100% by mass, and more preferably 50% by mass to 100% by mass. preferable. When the coating is a mixture of semi-solid flame retardant and semisolid compositions, mixing mass ratio of the semi-solid flame retardant and semisolid compositions in the coating composition is 95: from 35: 5 to 65 Furthermore, 90:10 to 70:30 is preferable, and 85:15 to 75:25 is desirable.

In order to disperse and emulsify the coating in water, it is preferable to heat it to a melting point (for example, 30 ° C.) or higher, and add and mix an appropriate surfactant, and then add water above the melting point of the coating. It is preferable to disperse and emulsify with a stirrer such as a homomixer or a homogenizer. As a result, the components such as flame retardant and gelling agent in the semi-solid flame retardant or the components such as petrolatum and polyethylene glycol in the semi-solid composition are sufficiently mixed with water in the coated material, and are uniform in the dough. Can be impregnated.

  As the surfactant, an anionic surfactant or a nonionic surfactant is used alone or in combination. Specific examples of anionic surfactants include higher alcohol sulfate salts such as sodium lauryl alcohol sulfate and sodium oleyl alcohol sulfate, higher alcohol ethylene oxide such as sodium polyoxyethylene lauryl ether sulfate and sodium polyoxyethylene stearyl ether sulfate. Sulfate salts of adducts, sulfonates such as sodium alkylbenzene sulfonate and sodium α-olefin sulfonate, higher alcohol phosphate salts such as disodium oleyl alcohol phosphate monoester, sodium stearyl alcohol phosphate diester, palmitic acid Examples include higher fatty acid salts such as sodium and amine stearate. These anionic surfactants may be used alone or in combination of two or more.

  Specific examples of the nonionic surfactant include sorbitan monopalmitate, sorbitan monooleate, sorbitan fatty acid esters such as sorbitan monostearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monooleate, polyoxyethylene Polyoxyalkylene fatty acid ester acids such as sorbitan monostearate, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyalkylene ethers such as polyoxyethylene stearyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene nonylphenyl Polyoxyalkylene alkyl allyl ethers such as ethers, polyoxyethylene / polyoxypropylene block copolymers, etc. It is. These nonionic surfactants may be used alone or in combination of two or more.

The amount of addition of the surfactant is 1 part by mass or more and 5 parts by mass or less when the amount of the semi-solid flame retardant or the coating material composed of the mixture of the semi-solid flame retardant and the semi-solid composition is 100% by mass. It is good. In this case, the flame retardant can be sufficiently dissolved in the solvent.

  A protective cover for a painting robot according to an embodiment of the present invention was manufactured and subjected to various experiments.

  Nylon multifilament 75 denier was used to create a tubular knitted fabric. The fabric is obtained by alternately knitting S / Z twisted yarns and knitting them with a tengu knitting machine. The weaving length of the fabric is 100 wells / 238 mm, the diameter of the cylindrical fabric is 55 cm, and the basis weight is 150 g / m. The fabric was cut and sewn along the shape of the robot arm.

On the other hand, the emulsion liquid of the coating material which consists of a semi-solid flame retardant or a semi-solid flame retardant and a semi-solid composition was prepared. There are three types of emulsion liquid compositions as shown in Table 1.

  Each of the emulsion liquids 1 to 4 was diluted with water. The dilution ratio was emulsion ratio: water = 2: 1 by volume ratio. Each diluted solution was dipped on the dough and passed between crimping rolls to squeeze out the excess. The adhesion mass before drying of the coated material with respect to the fabric at this time was 120 to 150 parts by mass when the mass of the knitted fabric was 100 parts by mass. Next, the cloth impregnated with the applied material was dried for 48 hours in an indoor hanging device. The amount of the coated material after drying and immediately before coating with the robot was 55 ± 5 parts by mass with respect to 100 parts by mass of the dough.

  Thus, the protective cover was created. The protective covers impregnating and adhering each diluted solution to the dough were designated as Examples 1, 2, 3, and 4, respectively. Various items of the protective cover of each example were verified as follows. In addition, each item was verified as a comparative example for the protective cover in which the diluted solution was not adhered to the fabric. The following items 3 to 8 were evaluated in the order of Δ, ○, and ◎ as the minimum evaluation was x, and the better.

1. Adhesion amount of semi-solid flame retardant: adhesion amount of semi-solid flame retardant for protective cover fabric 100 parts by weight after drying. Adhesion amount of the semisolid flame retardant, if it contains also semi-solid composition as well semisolid flame retardant coating material refers to a coating weight of only semi-solid flame retardants.
2. Flame retardancy: Evaluated by JIS L1091D method. The case where the number of flame contact until melting and burning by the proximity of the flame was less than 3 (failed) was marked as x, and the case where the number of flame contact was 3 or more (passed) was marked as ◎.
3. Cover attachability: The protective covers of the examples and comparative examples were attached to the arm portion of the painting robot. The case where it was difficult to attach was evaluated as x, and the evaluation was made in the order of Δ, ○, and ◎ as the attachment became easier.
4). Amount of dust on the cover before installation: The amount of dust on the protective cover immediately before being attached to the painting robot was measured. The case where the amount of dust adhering to the protective cover was large was evaluated as x, and the evaluation was made in the order of Δ, ○, and ◎ as the amount of adhesion decreased.
The following items 5 to 7 were measured after 72 hours of spraying the paint by the painting robot with each protective cover attached to the arm portion of the painting robot.
5. Paint adhesion: After spraying, the protective cover was removed from the painting robot, and the amount of paint adhering to the protective cover was measured. The case where the amount of adhesion was small was evaluated as x, and the evaluation was made in the order of Δ, ○, and ◎ as the amount increased.
6). Paint drop off: The amount of paint dropped from the protective cover during spraying was measured. The case where the dropout amount was large was evaluated as x, and the evaluation was made in the order of Δ, ○, and ◎ as the dropout amount decreased.
7). Paint scattering: The amount of paint mist scattered in the booth during spray coating was measured. The case where the amount of scattering was large was evaluated as x, and the evaluation was made in the order of Δ, ○, and ◎ as the amount of scattering decreased.
8). Durability: The protective cover after the test under the above conditions 5 to 7 was performed 5 times. Each time one test was completed, the laundry was washed and dried, and the emulsion liquid coating process was performed again. A case where the degree of damage such as a tearing of the protective cover was large was evaluated as x, and evaluation was made in the order of Δ, ○, and ◎ as the damage decreased.

  As a comparative example, a protective cover was prepared without adhering the emulsion liquid to the same knit knitted fabric as in the above example. In this case, the same items were verified. The evaluation results are shown in Table 2.

  Table 2 shows the evaluation results. As shown in Table 2, compared to the comparative example, the protective covers of Examples 1 and 2 are less flammable, have better mounting properties, are less likely to adhere to dust, and have a higher adsorbing power to paint mist, so that the paint drops off. There were few. In particular, Example 2 was better in attachment and paint adhesion than Example 1.

  The protective covers of Examples 1, 2, and 3 have good attachment properties and good paint adhesion, and the paint dropout was small, and the flammability test passed was the emulsion liquid impregnated and attached to the protective cover. This is because it contains a phosphorus-based flame retardant and a halogen-based flame retardant. The reason why the flame retardancy of Example 4 was unacceptable was that the amount of the flame retardant contained in the emulsion liquid was small, and thus burned.

From the results of the heat resistance test of Examples 1 to 4, the mixing ratio of the semi-solid flame retardant and the semi-solid composition in the coating is 90:10 to 70:30 (corresponding to Examples 1 to 3). In this case, it burned at a blending ratio of 60:40 (Example 4), and therefore failed the test of the JIS L1091D method. For this reason, the blending ratio of the semi-solid flame retardant and the semi-solid composition is preferably in the range of 95: 5 to 65:35, more preferably 90:10 to 70:30.

  In addition, the protective cover for a coating robot described in JP2011-183396A is 50% by mass of the semi-solid composition (white petrolatum) in the emulsion liquid and 50% by mass of water. Only the semi-solid composition was impregnated and adhered, and the test of the JIS L1091D method was rejected.

  Compared to Example 1, the mounting properties of Examples 2, 3, and 4 are good because petrolatum is contained in the emulsion liquid impregnated and adhered to the protective cover. The reason why the paint adhesion of Example 2 is better than that of Example 1 is that it is more compatible with the white petrolatum paint than the phosphorus flame retardant and halogen flame retardant contained in the emulsion liquid.

1: protective cover, 2: painting robot, 21: arm part, 22: painting gun.

Claims (9)

A fabric made of stretchable knitted fabric or woven fabric knitted with filament yarn made of synthetic resin, and a semi-solid flame retardant or a mixture of a semi-solid flame retardant and a semi-solid composition impregnated and adhered to the fabric And having a coating including
The protective cover for a painting robot, wherein the semi-solid flame retardant contains a gelling agent . 2. The protective cover for a painting robot according to claim 1, wherein the dough on which the coating material is impregnated and adhered maintains a wet state. The gelling agent is selected from the group consisting of castor oil, 1,2-hydroxystearic acid, sebacic acid, dibenzylidene-D sorbitol, hydroxystearic acid ester wax, hydroxy fatty acid amide wax, amino acid derivative, and dextrin derivative. The protective cover for a painting robot according to claim 1 or 2, comprising at least one of the above. Wherein the semi-solid flame retardant is 100 parts by weight, the content of the gelling agent according to claim 1 or less 15.0 parts by 0.1 parts by weight protective cover for the painting robot. The protective cover for a coating robot according to any one of claims 1 to 4, wherein the semi-solid flame retardant includes a phosphorus flame retardant, a halogen flame retardant, or a mixture of a phosphorus flame retardant and a halogen flame retardant. . The protective cover for a painting robot according to claim 1 , wherein the semi-solid composition is made of petrolatum. The protective cover for a painting robot according to any one of claims 1 to 5, wherein the semi-solid composition is made of a mixture of petrolatum and polyethylene glycol. The protective cover for a painting robot according to claim 6 or 7, wherein the petrolatum is white petrolatum or petrolatum. When the coating is a mixture of a semi-solid flame retardant and a semi-solid composition, in the coating,
The protective cover for a coating robot according to any one of claims 1 to 8 , wherein a blending mass ratio of the mixture of the semisolid composition and the semisolid flame retardant is 5:95 to 35:65.

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