JP7015658B2 - Rubberized cloth - Google Patents

Description

The present invention relates to a rubberized cloth, and more particularly to a rubberized cloth that can be suitably used for a tent awning or the like.

Conventionally, as a sheet used for a tent awning or the like, a resin sheet in which a resin material is laminated on a base cloth is known. For example, Patent Document 1 describes a light-transmitting heat-shielding tent sheet in which a sheet made of polyester or the like is used as a base material, an aluminum-deposited layer is provided on the base material, and a protective layer made of polyethylene is provided on the aluminum-deposited layer. The invention is disclosed. It is explained that the light-transmitting heat-shielding tent sheet can transmit visible light and shield infrared rays by providing an aluminum-deposited layer.

As a general tent awning, it is desirable to have good light transmission from the viewpoint of ensuring daylighting in the tent, and the above-mentioned light-transmitting heat-shielding tent sheet is used to meet such a demand. It is an improved sheet.

Japanese Unexamined Patent Publication No. 11-36669

However, a sheet made of a resin material as represented by the sheet disclosed in Patent Document 1 is not sufficient in terms of durability and cold resistance. For example, an air tent that can be set up in a few minutes by injecting a fluid such as gas or liquid into an air column in an emergency due to the occurrence of a disaster or accident is known. A tent used in such an emergency is desired to have superior durability and cold resistance as compared with a leisure tent. On the other hand, rubberized cloth may be selected as the awning.

The rubberized cloth is basically a structure in which a rubber layer is laminated on the base cloth, and is excellent in flexibility and weather resistance as compared with the above-mentioned resin sheet, and is suitable as a tent awning from this viewpoint.

However, the rubberized cloth has the following problems. That is, the rubberized cloth has spots in the visual observation of the surface on the side irradiated with light (hereinafter, also referred to as outer surface observation) or the visual observation of the surface on the side through which light is transmitted (hereinafter, also referred to as inner surface observation). The visible discoloration marks peculiar to rubber were visually recognized, which was a problem. This problem was particularly remarkable when the light was sunlight. In particular, in the case of a rubberized cloth having a high lightness color, discoloration marks may be conspicuous in the outer surface observation or the inner surface observation, and the aesthetic appearance may be impaired. White is also included in the above-mentioned high-brightness colors. Further, when the rubberized cloth is used as the tent awning, there is a problem that the color peculiar to rubber is reflected in the tent and the whole tent has a brownish atmosphere. The above-mentioned problems of the occurrence of discoloration marks and the browning of the atmosphere in the tent are summarized, and the following may be various problems of rubberized cloth.

It is desirable to avoid the above-mentioned problems of rubberized cloth in all tents equipped with a awning made of rubberized cloth. Especially in medical tents where the outer and inner surfaces of the awning need to be white, problems with rubberized cloth spoil the appearance and make the interior space of the tent brownish for proper examination. Was at risk of being hindered.

The present invention has been made in view of the above-mentioned problems. That is, the present invention has various problems of rubber-pulled cloth and rubber-pulled cloth, in which discoloration marks are not conspicuous and it is possible to avoid a brownish atmosphere peculiar to rubber on the light passing side when light is passed through. It provides an air tent equipped with a awning that does not generate rubber.

The rubberized cloth of the present invention has a base cloth, a rubber layer directly or indirectly laminated on the base cloth, and a colored rubber layer provided on the surface on the rubber layer side . The colored rubber layer contains a black pigment as the concealing pigment, and the colored rubber layer is characterized by containing a white colorant having a color different from that of the concealing pigment .

Further, the air tent of the present invention is characterized by having a awning provided with the rubberized cloth of the present invention and an air column.

In the rubberized cloth of the present invention having the above structure, since the rubber layer contains a hiding pigment, the visual appearance of discoloration marks is suppressed in the outer surface observation and the inner surface observation. Further, when light is passed through the rubberized cloth of the present invention, the brownish atmosphere peculiar to rubber is suppressed on the light passing side.
Further, the air tent of the present invention provided with the rubberized cloth as a awning prevents discoloration marks as in the conventional case from being inconspicuous in the outer surface observation and the inner surface observation of the awning, and also prevents the internal space of the tent from becoming a brownish atmosphere. Will be done. Therefore, the air tent of the present invention can exhibit the flexibility and weather resistance which are the advantages of the rubberized cloth, and provide an indoor environment which is not dominated by the beautiful appearance and the brown atmosphere (color) peculiar to rubber. can.

It is a schematic cross-sectional view schematically showing the cross-sectional structure of the rubberized cloth which concerns on the 1st Embodiment of this invention. It is a schematic cross-sectional view schematically showing the cross-sectional structure of the rubberized cloth which concerns on the 2nd Embodiment of this invention. It is a schematic cross-sectional view schematically showing the cross-sectional structure of the rubberized cloth which concerns on the 3rd Embodiment of this invention. It is a perspective view of the air tent which concerns on 4th Embodiment of this invention.

The rubberized cloth of the present invention has a base cloth and a rubber layer directly or indirectly laminated on the base cloth, and the rubber layer is configured to contain a hiding pigment.
According to the study of the present inventor, it is presumed that the above-mentioned problems of the conventional rubberized cloth are caused not only by the original color of the rubber of the rubber layer formed in the form of a sheet but also by the following factors. rice field. That is, the molded product containing the rubber material may be formed through a step of adding sulfur or the like to form an intermolecular bond and cross-linking (hereinafter, also referred to as a vulcanization step) in order to sufficiently secure the elasticity of the molded product. It is common. Also in the case of producing a rubberized cloth, it is common to carry out a vulcanization step at the time of forming the rubber layer in order to improve the flexibility of the rubber layer. However, in the rubber molded product that has undergone the vulcanization step, a region where cross-linking is partially dense may occur, and in a rubber molded product having a small thickness such as a rubber layer in a rubberized cloth, the region is described above. It was presumed to be a discoloration mark. Further, when an adhesive layer using a rubber material is formed between the base cloth and the rubber layer, it is presumed that discoloration marks caused by the vulcanization step are similarly generated.
Therefore, in general, in a rubberized cloth for which light transmission should be ensured, the present inventors intentionally impregnate the rubber layer with a concealing pigment to give the rubber layer concealing property, thereby substantially discoloring the rubber layer. By preventing the visible marks and suppressing the internal space of the tent from becoming a brownish atmosphere, the above-mentioned problems of rubberized cloth have been solved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all drawings, similar components are designated by the same reference numerals, and duplicate description will be omitted as appropriate.

<First Embodiment>
Hereinafter, the first embodiment of the rubberized cloth of the present invention will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view schematically showing a cross-sectional structure of the rubberized cloth 100 according to the first embodiment of the present invention.
As shown in FIG. 1, the rubberized cloth 100 has a base cloth 10 and a rubber layer 20 directly or indirectly laminated on the base cloth 10. The rubber layer 20 contains a concealing pigment (not shown). In the present embodiment, the rubber layer 20 is indirectly laminated on the base cloth 10 via the adhesive layer 30, but for example, the adhesive layer 30 is omitted and the rubber layer 20 is directly laminated on the base cloth 10. May be good.
Since the rubber layer of the rubberized cloth 100 having such a structure contains a concealing pigment, it is difficult to visually recognize the discoloration marks peculiar to rubber in both the outer surface observation and the inner surface observation when viewed through light. Further, the color of the concealing pigment contained in the rubber layer 20 prevents a brown atmosphere peculiar to rubber from being generated on the side through which the light incident on the rubberized cloth 100 is transmitted.

Next, the rubberized cloth 100 of the present embodiment will be described in detail.
The base cloth 10 is a base material for laminating the rubber layer 20. The base cloth 10 can be appropriately selected and used from the cloths generally used as the base cloths for rubberized cloths. Here, the cloth includes a woven fabric, a knitted fabric, and a non-woven fabric, and means a sheet-like material formed by an assembly of a large number of fibers. For example, examples of the fibers constituting the base fabric 10 include synthetic fibers formed by one or a mixture of polyamide, polyester, polyurethane, polypropylene, or vinylon, natural fibers formed of cotton, linen, and the like, or natural fibers and the like. Any one or combination of blended fibers using synthetic fibers and the like can be mentioned. The base cloth 10 may be a woven fabric or a knitted fabric in which the stitches or stitches remain, or may be a sheet-like material in which the stitches or stitches are melted by heat treatment or the like and the stitches are substantially closed. good. However, in order to obtain better flexibility, a cloth having a texture or stitch is desirable as the base cloth 10.

The thickness of the base cloth 10 is not particularly limited. When the rubberized cloth 100 is used as a tent awning, it is preferably in the range of 50 μm or more and 1000 μm or less in order to balance flexibility, weather resistance and light weight.

The rubber layer 20 is a layer that is laminated and integrated with the base cloth 10 to contribute to the flexibility and weather resistance of the rubberized cloth 100, and also exhibits hiding properties by containing a hiding pigment described later. The rubber material constituting the rubber layer 20 may be either natural rubber or synthetic rubber. Further, the rubber layer 20 may be in either an embodiment formed by including one kind of rubber material or an embodiment formed by including two or more kinds of rubber materials.
The natural rubber contains polyisoprene contained in sap as a main component and a highly elastic polymer substance.
The synthetic rubber may be any material that is generally understood to be rubber, and can be appropriately selected from the materials constituting the rubber layer in known rubberized cloths. Examples of the synthetic rubber include various types of rubber classified into a plurality of polybutadiene-based, silicone-based, polyurethane-based, chlorine-based, and fluorine-based rubbers.
Examples of the polybutadiene rubber include styrene-butadiene rubber, which is a random copolymer of styrene and butadiene, and nitrile rubber produced by an emulsion polymerization method using acrylonitrile and butadiene.
The silicone-based rubber refers to a rubber containing a silicone resin as a main component, and includes a silicone-modified rubber obtained by modifying various rubbers with a silicone rubber. Examples of the silicone-modified rubber include silicone-modified EPDM obtained by modifying ethylene propylene diene rubber (EPDM) with silicone rubber.
Examples of the polyurethane-based rubber include thermoplastic polyurethane which is a block copolymer of thermoplastic ether-based polyurethane.
The chlorine-based rubber refers to a rubber containing a chlorine atom in its structure, and examples thereof include chloroprene rubber and chlorosulfonated polyethylene rubber.
The fluororubber refers to a rubber containing a fluorine atom in its structure, and examples thereof include fluororubber which is a copolymer of tetrafluoroethylene and propylene.

Further, as the synthetic rubber, a telekeylic having a functional group which exhibits fluidity at room temperature and can be crosslinked such as a carboxyl group, a hydroxyl group, a mercapto group, a halogen atom, an amino group, an aziridyl group, or an epoxy group at the molecular terminal. An isocyanate cross-linked rubber obtained by reaction-cross-linking a liquid rubber and a polyisocyanate can also be used. Specifically, the telequilic liquid rubber is a reactive group at both ends of polybutadiene, polyisoprene, polychloroprene, butadiene-isoprene copolymer, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer and the like. It is a liquid rubber material having.
In particular, from the viewpoint of excellent weather resistance, chlorosulfonated polyethylene rubber or chloroprene rubber is preferable.

The concealing pigment contained in the rubber layer 20 is not particularly limited as long as it is a pigment capable of providing the rubber-drawn cloth 100 with a concealing property to the extent that various problems of the rubber-drawn cloth can be solved. The concealing pigment can be either an organic pigment or an inorganic pigment, or a combination thereof.
Specific examples of concealing pigments include carbon black, iron black, cadmium red, ultramarine, navy blue, mars violet, manganese violet, cobalt violet, cobalt blue, cerulean blue, emerald green, yellow lead, yellow iron oxide, and cadmium yellow. Colored pigments such as titanium yellow, barium yellow, quinacridone, aureolin, molybdate orange, petals, lead tan, dragon sand, chromium oxide, chrome vermillion, or viridian, or titanium oxide (titanium white, titanium white), zinc oxide ( Zinc oxide), basic lead carbonate (white lead), basic lead sulfate, zinc sulfide, lithopon, white pigments such as titanox and the like can be mentioned. The pigment may be used alone or may be mixed and used.
From the viewpoint that sufficient hiding power can be imparted with a small content, a colored pigment is preferable as the pigment, and a black pigment such as carbon black or iron black is more preferable.

The amount of the concealing pigment blended in the rubber layer 20 is not particularly limited, but it is preferable that the concealing pigment is blended without excess or deficiency within a range that can impart an appropriate concealing property to the rubberized cloth 100. From this point of view, in the rubber layer 20, it is preferable that the concealing pigment is blended in a range of 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the rubber material, and in a range of 5 parts by mass or more and 40 parts by mass or less. It is more preferable to blend. In particular, when carbon black is selected as the concealing pigment in order to color the rubber layer 20 black to impart concealing properties, carbon black is 1 part by mass or more and 15 parts by mass with respect to 100 parts by mass of the rubber material. Sufficient concealment can be imparted to the rubberized cloth 100 by blending in a range of 5 parts by mass or less, or 5 parts by mass or more and 10 parts by mass or less.

The concealing property of the rubberized cloth 100 is that the rubberized cloth 100 is exposed to sunlight and visually observed on the outer surface and the inner surface to see if discoloration marks are visible, or when the tent is used as a tent. It can be judged by a sensual examination whether or not the person who enters the tent feels the atmosphere in the tent is brownish.

The thickness of the rubber layer 20 is not particularly limited. When the rubberized cloth 100 is used as a tent awning, it is preferably in the range of 50 μm or more and 500 μm or less in order to balance flexibility, weather resistance and light weight. However, the rubberized cloth 100 tends to be heavier than a resin sheet such as a so-called tarpaulin. Therefore, there is a demand for weight reduction of the rubberized cloth 100 depending on the application (for example, the awning of an air tent). From the viewpoint of reducing the weight of the rubberized cloth 100, it is preferable that the rubber layer has a thickness of 30 μm or more and 200 μm or less. The lower limit of the thickness is more preferably 40 μm or more, further preferably 50 μm or more. Further, the upper limit of the thickness is more preferably 160 μm or less, and further preferably 120 μm or less. Further, from the viewpoint of maintaining good weather resistance while reducing the thickness of the rubber layer 20, the rubber layer 20 formed by using chlorosulfonated polyethylene rubber or chloroprene rubber is within the above-mentioned thickness range. preferable.

Additives may be further added to the rubber layer 20 as appropriate without departing from the spirit of the present invention. Optional additives include vulcanizing agents such as magnesium oxide or sulfur, vulcanizing aids such as zinc oxide, plasticizers such as bis (2-ethylhexyl) phthalate or adipic acid diester, water absorbents, anti-aging agents, etc. Examples include process oil. When the rubber material contained in the rubber layer 20 is an isocyanate crosslinked rubber, the liquid rubber is contained in the liquid rubber in order to promote or delay the urethanization reaction between the liquid rubber and the polyisocyanate to adjust the reaction rate. Further, a reaction modifier, a cross-linking agent, a urethanization catalyst, a blended polyol, or the like may be added. The cross-linking agent serves as a cross-linking agent during the urethanization reaction between the liquid rubber constituting the isocyanate-cross-linked rubber and polyisocyanate, and examples of the cross-linking agent include 1,4-butanediol and 1,5-. Bifunctional or higher low molecular weight hydroxyl compounds such as pentandiol, ethylene glycol, diethylene glycol, 1,6-hexanediol, glycerin, diethanolamine, triethanolamine, and trimethylolpropane can be used.

As one of the methods for more objectively determining the concealing property of the rubberized cloth 100, there is a method of measuring the light shielding rate of the rubberized cloth 100. More specifically, as a method for measuring the shading rate of the rubberized cloth 100, a method of measuring the shading rate at an illuminance of 100,000 lux using a luminometer based on the JIS L 1055 A method (2009) can be mentioned. From the viewpoint of exhibiting good hiding power and avoiding various problems of the rubberized cloth, the light shielding rate of the rubberized cloth 100 is preferably 99.4% or more, more preferably 99.8% or more, and 99.99. % Or more is more preferable. As described above, by imparting an appropriate concealing property to the rubber layer 20 and exhibiting a desirable concealing property as a whole of the rubberized cloth 100, the desired problem of the present invention can be satisfactorily solved.

As shown in FIG. 1, the rubberized cloth 100 according to the present embodiment includes an adhesive layer 30 containing a rubber material between the rubber layer 20 and the base cloth 10. By providing the adhesive layer 30, the adhesiveness between the rubber layer 20 and the base cloth 10 can be enhanced.

The adhesive layer 30 is made of a rubber material similar to the above-mentioned rubber material used for the rubber layer 20. Therefore, a specific description of the rubber material used for the adhesive layer 30 is omitted here.
The rubber material contained in the adhesive layer 30 and the rubber material contained in the rubber layer 20 may be the same or different. From the viewpoint of enhancing the adhesiveness, it is preferable that the adhesive layer 30 and the rubber layer 20 contain at least one similar or the same rubber material. From the viewpoint of good adhesiveness and excellent weather resistance, it is preferable that each of the adhesive layer 30 and the rubber layer 20 contains a chlorine-based rubber, and the chlorine-based rubber contains chloroprene rubber or chlorosulfonated polyethylene. It is more preferable that it is.

The adhesive layer 30 is in the form of a sheet obtained by applying a coating agent adjusted to an appropriate viscosity by diluting a rubber material with a solvent to a base cloth 10 to form a coating film, and forming the rubber layer 20 on the coating film. It is formed by laminating objects and pressure-bonding them with a crimping roll or the like. If necessary, a vulcanization step is then carried out. The thickness of the adhesive layer 30 is not particularly limited, but is formed by applying the coating agent to the base cloth 10 so that the resin solid content in the coating agent is in the range of 10 g / m ² or more and 100 g / m ² or less. The thickness of is common. Any additive may be added to the coating agent as appropriate.

The solvent used to prepare the coating agent is used to adjust the viscosity of the rubber agent constituting the adhesive layer 30 and to facilitate the coating property on the base cloth 10 and the mixing with various additives. Examples of the solvent include hydrocarbon compounds such as butane, pentane, gasoline, petroleum spirit, or cyclohexane; aromatic hydrocarbon compounds such as benzene, toluene, or xylene; methyl chloride, methylene chloride, chloroform, carbon tetrachloride, etc. Halogenated hydrocarbon compounds such as trichloroethane, tetrachloroethane, trichloromonofluoromethane, or dichlorodifluoromethane; halogenated aromatic hydrocarbon compounds such as chlorobenzene, chlorotoluene, or brombenzene; ethyl ether, isopropyl ether, dioxane, Or ether compounds such as tetrahydrofuran; ketone compounds such as acetone, methyl acetone, methyl ethyl ketone, methyl isobutyl ketone, or cyclohexanone; ester compounds such as ethyl acetate, methyl acetate, isobutyl acetate, ethyl propionate, or methyl propionate, etc. Can be mentioned.
Further, as the solvent, water, alcohols and the like can also be used.
The amount of these solvents added is preferably 100 parts by mass or more, and more preferably 100 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the rubber material constituting the adhesive layer 30.

As described above, it is preferable to provide the adhesive layer 30 because the base cloth 10 and the rubber layer 20 are well integrated. However, it is not easy to uniformly apply the coating agent containing the rubber material to the base cloth 10. If the vulcanization step is carried out with uneven coating of the coating agent, vulcanization marks are formed, which has conventionally been a cause of remarkable discoloration marks. However, in the present invention, since the rubber layer 20 contains the concealing pigment, even when the vulcanization marks are generated, the vulcanization marks are difficult to be visually recognized in the outer surface observation and the inner surface observation, and the appearance of the vulcanization marks is difficult to see. An excellent rubberized cloth 100 can be provided.

The method for forming the rubberized cloth 100 described above is not particularly limited, and a conventionally known method can be appropriately adopted. For example, in the rubberized cloth 100 in which the rubber layer 20 is laminated via the adhesive layer 30, the above-mentioned coating agent is applied onto the base cloth 10 to form a coating film (adhesive layer 30), and the coating film is formed. A rubber thin film (rubber layer 20) dispensed from a calendar device is laminated on the surface, pressure-bonded with a pressure-bonding roll or the like, and then a vulcanization step is carried out to produce the product.
Further, in the rubberized cloth 100 (not shown) of the type having no adhesive layer 30, a rubber material is added to the solvent, the rubber material is applied directly to the base cloth 10, and then the solvent is heated by a heating oven or the like. It is produced by volatilizing to form a pre-rubber layer on the base cloth 10 and then carrying out a vulcanization step. Alternatively, a rubber thin film is formed in advance on the release paper, the rubber thin film in a semi-crosslinked state is peeled off from the release paper, attached to the base cloth 10, and further heated to complete the cross-linking. Can be produced.

<Second embodiment>
Hereinafter, the second embodiment of the rubberized cloth of the present invention will be described with reference to FIG. FIG. 2 is a schematic cross-sectional view schematically showing a cross-sectional structure of the rubberized cloth 110 according to the second embodiment of the present invention.

The rubberized cloth 110 is different from the rubberized cloth 100 described above in that it includes a colored layer 40, and other configurations are appropriately the same as those of the rubberized cloth 100. Therefore, the description of the configuration other than the colored layer 40 will be omitted as appropriate.
The coloring layer 40 is a layer provided on the surface on the rubber layer 20 side, and contains a coloring agent and a rubber material having a color different from that of the hiding pigment contained in the rubber layer 20. Although not shown, a colored rubber layer may be provided on the surface of the rubberized cloth 110 opposite to the rubber layer 20. Further, although FIG. 2 shows a configuration in which the colored layer 40 is directly laminated on the rubber layer 20, an arbitrary layer may be provided between them as appropriate.

The colored layer 40 is a layer capable of exhibiting a desired color in the outer surface observation of the rubberized cloth 110. By providing the rubber layer 20 containing the concealing pigment, the rubberized cloth 110 makes it difficult to visually recognize the discoloration marks, and therefore the color of the colored layer 40 is clearly reflected in the external observation. For example, when a rubberized cloth 110 is used as a awning for a medical air tent, a white colorant is added to the colored layer 40 to provide a beautiful white air tent that is not affected by discoloration marks. be able to. That is, in the rubberized cloth 110 according to the present embodiment, in order to form the outer surface with a specific color such as white, a black color is intentionally placed between the coloring layer 40 containing the white pigment and the like and the base cloth 10. By providing the rubber layer 20 containing the concealing pigment such as the above, a desired color can be beautifully realized.

As the rubber material constituting the colored layer 40, the same rubber material as that used for the rubber layer 20 may be used. The colored layer 40 is made of the same rubber material as the above-mentioned rubber material used for the rubber layer 20. Therefore, a specific description of the rubber material used for the colored layer 40 is omitted here. The rubber material contained in the colored layer 40 and the rubber material contained in the rubber layer 20 may be the same or different, but the colored layer 40 and the rubber layer 20 may be well adhered to each other. From the viewpoint, it is preferable to use the same or similar rubber material. From the viewpoint of good adhesion to each other and excellent weather resistance, it is preferable that each of the colored layer 40 and the rubber layer 20 contains a chlorine-based rubber, and the chlorine-based rubber is chloroprene rubber or chlorosulfonated. More preferably, it contains polyethylene.

The thickness of the colored layer 40 is not particularly limited. From the viewpoint of not hindering the weight reduction of the rubberized cloth 110 and clearly exhibiting a desired color, the range can be, for example, 50 μm or more and 500 μm or less, preferably 50 μm or more and 200 μm or less, and 50 μm or more. It is more preferably 100 μm or less.

The colorant contained in the colored layer 40 may have a color different from that of the hiding pigment, and includes, for example, an organic pigment or an inorganic pigment.

<Third embodiment>
Hereinafter, a third embodiment of the rubberized cloth of the present invention will be described with reference to FIG. FIG. 3 is a schematic cross-sectional view schematically showing a cross-sectional structure of the rubberized cloth 120 according to the third embodiment of the present invention.

The rubberized cloth 120 is different from the rubberized cloth 100 described above in that the surface coat layer 50 is provided, and other configurations are appropriately the same as those of the rubberized cloth 100. Therefore, the description of the configuration other than the surface coat layer 50 is omitted as appropriate.
The surface coat layer 50 is a layer provided on a surface opposite to the surface on which the rubber layer 20 of the base cloth 10 is laminated, and includes a rubber material or a resin material.

Specifically, the resin material contained in the surface coat layer 50 includes a urethane resin, a vinyl chloride resin, a vinyl chloride-vinyl acetate copolymer resin, an ethylene-vinyl acetate copolymer resin, a polypropylene resin, a polyethylene resin, and vinylidene chloride. Resin, polyester resin, chlorinated polypropylene, chlorinated polyethylene and the like can be used alone or in combination of two or more. The surface coat layer 50 can be composed of a single layer or a plurality of layers. If it is formed of a plurality of layers, the manufacturing cost may increase. Therefore, it is preferable to select either a single layer or a plurality of layers depending on the use of the rubberized cloth 120 and the like.
The surface coat layer 50 containing the resin material has better adhesiveness to the adhesive than the base cloth 10, and also adheres well to the base cloth 10. Therefore, when forming a plurality of cut objects obtained by cutting the rubberized cloth 120 to an appropriate size and bonding them with an adhesive to process a sheet having a predetermined shape (for example, a tent awning), an adhesive is used. By interposing the surface coat layer 50 between the adhesive and the base cloth 10, peeling between the adhesive and the base cloth 10 can be prevented and the adhesive can be reliably bonded.

As the rubber material contained in the surface coat layer 50, the same rubber material as that contained in the rubber layer 20 can be used, and therefore detailed description thereof will be omitted here.
The rubberized cloth 120 provided with the surface coat layer 50 containing a rubber material exhibits good waterproofness, and is therefore preferable as a material for forming, for example, an air column of a rubber boat or an air tent.

The thickness of the surface coat layer 50 is not particularly limited, but from the viewpoint of exhibiting good adhesiveness and enabling bonding in the bonding process, or from the viewpoint of exhibiting sufficient preventive property, the base cloth 10 is compared with the base cloth 10. It is preferable that the above-mentioned resin material or rubber material is applied in the range of 10 g / m ² or more and 60 g / m ² or less in terms of solid content.

Although the first to third embodiments of the rubberized cloth of the present invention have been described above, these are not limited to the present invention. To the extent that the gist of the present invention is not deviated, another layer may be further provided at an arbitrary position of the rubberized cloth in each embodiment, and the layer received in one embodiment may be appropriately other. It can also be applied to the embodiment of. For example, the present invention also includes an embodiment in which a colored layer 40 and a surface coat layer 50 are further provided for the structure of the rubberized cloth 100.

<Fourth Embodiment>
Hereinafter, embodiments of the air tent of the present invention will be described with reference to FIG. FIG. 4 is a perspective view of the air tent 200 according to the fourth embodiment of the present invention.

The air tent 200 has a awning 60 provided with the rubberized cloth 110 of the present invention described above, and an air column 70. Since the rubberized cloth 110 of the present invention is used as the awning, the air tent 200 is beautiful because discoloration marks are hard to be visually recognized on the surface of the awning 60 from both outdoors and inside the tent under sunlight. Further, it is possible to prevent the inside of the air tent 200 from having a brownish atmosphere peculiar to rubber. In this embodiment, an embodiment in which the rubberized cloth 110 is used as the awning 60 will be described as an example, but the rubberized cloth 100 or the rubberized cloth 120 may be appropriately used as the awning 60 of the air tent 200.

The details of the air tent 200 will be described below. The air tent 200 has an air column 70 forming the skeleton of the tent and a awning 60 (rubber cloth 110) provided along the air column 70. In this embodiment, the tent 60 is arranged along the outside of the air column 70. Generally, the air column 70 and the awning 60 are joined at a predetermined position. When the air column 70 is filled with liquid or gas, the air column 70 expands and the awning 60 is stretched, whereby the air tent 200 is quickly installed. Since the installation is simple and can be performed in a short time as described above, the air tent 200 is preferably used, for example, in an emergency or a disaster. The air tent 200 according to the present embodiment is provided with a floor 80 inside.
The air column 70 has a plurality of column portions 72 extending upward from the floor 80, and a beam portion 74 extending substantially horizontally across the adjacent column portions 72. The air tent 200 has a gas inlet 84 capable of filling the air column 70 with gas or liquid. For example, as shown in FIG. 4, the gas inlet 84 projects outward from the outer surface of the awning 60 and communicates with the air column 70 via the awning 60. On the front side of the air tent 200, a door 82 formed of a part of the awning 60 is provided. The door 82 shown in FIG. 4 is rolled up and stopped at the upper end portion, and is in an open state.

In the air tent 200, the rubberized cloth 110 constituting the awning 60 is provided with a coloring layer 40 containing a coloring agent having a color different from that of the hiding pigment and a rubber material on the surface on the rubber layer 20 side. Here, by making both the base cloth 10 and the colored layer 40 white, the air tent 200 can be used for medical purposes. Here, the white system is not particularly defined by lightness or the like, but may be white or a color close to white within the range permitted as a tent of a medical tent.

As described above, the rubberized cloth 110 is provided with a concealing rubber layer 20, which suppresses the visual inspection of discoloration marks peculiar to rubber and prevents the atmosphere in the tent from becoming brownish. Therefore, the white appearance indicating that the tent is for medical use is not impaired, and it is possible to avoid the obstruction of medical practice due to the brownish atmosphere in the tent. For example, in a medical air tent 200 whose standard is a white appearance, a rubber layer 20 using a black pigment is intentionally provided, and a white layer (that is, white coloring) is provided on both sides of the black rubber layer 20. By using the rubberized cloth 110 provided with the layer 40 and the white base cloth 10) as the awning 60, good weather resistance and flexibility, as well as a beautiful white appearance and a natural atmosphere (color) in the tent can be obtained. It can be realized.

(Example 1)
The following composition for an adhesive layer was coated on a base cloth made of polyester fibers with a solid content of 25 g / m ² and heated and dried to form an adhesive layer. Next, the following composition for a rubber layer was mixed and kneaded, and the composition was dispensed onto the adhesive layer to a thickness of 0.10 mm by a calendar device and laminated to obtain a rubber layer. Subsequently, the following composition for a colored layer was mixed and kneaded, and the composition was dispensed and laminated on the rubber layer to a thickness of 0.05 mm by a calendar device to obtain a colored layer. Then, the vulcanization step was carried out by heating at a chamber temperature of 150 ° C. for 10 minutes to prepare a rubberized cloth, which was designated as Example 1.

<Composition for adhesive layer>
・ Chloroprene rubber (rubber resin) 100 parts by mass ・ Magnesium oxide (vulcanizer) 3 parts by mass ・ 2-imidazolidinethione (accelerator) 2 parts by mass ・ Stealic acid (processing aid) 1 part by mass ・ Zinc oxide (vulcanization aid) Agent) 10 parts by mass, rosin (thickener) 3 parts by mass, aluminum hydroxide silicate (filler) 50 parts by mass The above formulation was diluted with toluene to obtain a 40% solution.
<Composition 1 for rubber layer>
・ Chloroprene rubber (rubber resin) 80 parts by mass ・ butadiene rubber (rubber resin) 20 parts by mass ・ Magnesium oxide (vulcanizer) 4 parts by mass ・ Sulfur (vulcanizer) 0.5 parts by mass ・ 2-imidazolidinethione (accelerator) ) 1.5 parts by mass, tetramethylthium disulfide (accelerator) 0.5 parts by mass, bis (2-ethylhexyl) phthalate (plasticizer) 30 parts by mass, zinc oxide (vulcanization aid) 5 parts by mass, steer Zinc acid (processing aid) 3 parts by mass, stearic acid (processing aid) 2 parts by mass, aluminum hydroxide silicate (filler) 90 parts by mass, carbon black (concealing pigment) 7 parts by mass <Composition for colored layer Thing>
・ Chlorosulfonated polyethylene (rubber resin) 100 parts by mass ・ Magnesium oxide (sulfurizing agent) 4 parts by mass ・ 2-Imidalin-2-thiol (accelerator) 0.5 parts by mass ・ Bis phthalate (2-ethylhexyl) ( Plasticizer) 50 parts by mass, stearic acid (processing aid) 1 part by mass, zinc stearate (processing aid) 1.5 parts by mass, calcium carbonate (filler) 20 parts by mass, silica (filler) 25 parts by mass・ Titanium oxide (white pigment) 30 parts by mass

(Example 2)
A rubberized cloth was formed in the same manner as in Example 1 except that the composition 1 for the rubber layer was changed to the composition 2 for the rubber layer described below, which was referred to as Example 2.

<Composition for rubber layer 2>
・ Chloroprene rubber (rubber resin) 80 parts by mass ・ butadiene rubber (rubber resin) 20 parts by mass ・ Magnesium oxide (vulcanizer) 4 parts by mass ・ Sulfur (vulcanizer) 0.5 parts by mass ・ 2-imidazolidinethione (accelerator) ) 1.5 parts by mass, tetramethylthium disulfide (accelerator) 0.5 parts by mass, bis (2-ethylhexyl) phthalate (plasticizer) 30 parts by mass, zinc oxide (vulcanization aid) 5 parts by mass, steer Zinc acid (processing aid) 3 parts by mass, stearic acid (processing aid) 2 parts by mass, aluminum hydroxide silicate (filler) 90 parts by mass, silica (filler) 20 parts by mass, carbon black (concealing pigment) ) 1.5 parts by mass

(Comparative Example 1)
A rubberized cloth was produced in the same manner as in Example 1 except that the rubber layer was not formed and the thickness of the colored layer was changed to 0.15 mm, which was used as Comparative Example 1.

(evaluation)
Examples 1 and 2 and Comparative Example 1 obtained above are used as a awning of an air tent having a height of 300 cm, a width of 600 cm, and a depth of 600 cm. Was installed. Each tent was set up outdoors and the light bulbs were turned on. And it was evaluated as follows. The evaluation results are shown in Table 1.
That is, the awning was visually observed from the outside of the tent and the inside of the tent under sunlight. Observations from outside the tent were made by standing at a position about 200 cm away from the edge of the tent. Observations from inside the tent were performed while lying on his back in the center of the tent.

(Evaluation in observation from outside the tent)
No discoloration marks were confirmed, and the white color of the colored layer was beautifully reflected as the color of the tent. ◎
Almost no discoloration marks were confirmed, and the white color of the colored layer was beautifully reflected as the color of the tent. ○ ○
Discoloration marks were confirmed, and the color of the tent was turbid or dirty white. ×
(Evaluation in observation from inside the tent)
No discoloration marks were confirmed, and the atmosphere inside the tent reflected the color of the light bulb. ◎
Almost no discoloration marks were confirmed, and the atmosphere inside the tent reflected the color of the light bulb. ○ ○
Discoloration marks were confirmed, and the atmosphere inside the tent was a brownish color peculiar to rubber. ×

(Measurement of shading rate)
Using the rubberized cloths of Examples 1 and 2 and Comparative Example 1 obtained above, the shading rate at an illuminance of 100,000 lux was measured using a luminometer based on the JIS L 1055 A method (2009). The measurement results are shown in Table 1.
In general, the light-shielding property of a sheet-like object is first-class when the light-shielding rate is 99.99% or more (to the extent that the facial expression of a human face cannot be identified), and second-class when the light-shielding rate is 99.80% or more (human face). A person's face can be seen, but a shading rate of 99.40% or more is evaluated as grade 3 (a person's face can be seen, but it is dark enough to work).
In this example, it was confirmed that all of Examples 1 and 2 had a light-shielding property of grade 3 or higher and high light-shielding performance. On the other hand, in Comparative Example 1, the light-shielding rate was 98.2% and the light-shielding property was less than the third grade.

The above embodiment includes the following technical ideas.
(1) It has a base cloth and a rubber layer directly or indirectly laminated on the base cloth.
A rubberized cloth characterized in that the rubber layer contains a hiding pigment.
(2) The rubberized cloth according to (1) above, wherein an adhesive layer containing a rubber material is provided between the rubber layer and the base cloth.
(3) The rubberized cloth according to (1) or (2) above, wherein the rubber layer contains the hiding pigment in a range of 5 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the rubber material.
(4) The rubberized cloth according to any one of (1) to (3) above, wherein the light blocking rate is 99.4% or more.
(5) Any one of (1) to (4) above, wherein a surface coat layer containing a rubber material or a resin material is provided on the surface of the base fabric opposite to the surface on which the rubber layer is laminated. The rubberized cloth described in.
(6) The item according to any one of (1) to (5) above, wherein the surface on the rubber layer side is provided with a colored rubber layer containing a colorant having a color different from that of the hiding pigment and a rubber material. Rubberized cloth.
(7) An air tent comprising a awning provided with the rubberized cloth according to any one of (1) to (6) above, and an air column.
(8) The rubberized cloth is provided with a colored rubber layer containing a colorant and a rubber material having a color different from that of the hiding pigment on the surface on the rubber layer side.
The air tent according to (7) above for medical use, wherein both the base cloth and the colored rubber layer are white.

10 Base cloth 20 Rubber layer 30 Adhesive layer 40 Colored layer 50 Surface coat layer 60 Ambassador 70 Air column 72 Pillar part 74 Beam part 80 Floor 82 Door 84 Fluid inlet 100, 110, 120 Rubberized cloth 200 Air tent

Claims (8)

It has a base cloth, a rubber layer directly or indirectly laminated on the base cloth, and a colored rubber layer provided on the surface on the rubber layer side .
The rubber layer contains a black pigment as a concealing pigment, and the rubber layer contains a black pigment .
A rubberized cloth , wherein the colored rubber layer contains a white colorant having a color different from that of the hiding pigment . The rubberized cloth according to claim 1, wherein an adhesive layer containing a rubber material is provided between the rubber layer and the base cloth. The rubber-drawn cloth according to claim 1 or 2, wherein the rubber layer contains the concealing pigment in a range of 1 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the rubber material. The rubberized cloth according to any one of claims 1 to 3, wherein the light-shielding rate is 99.4% or more. The rubberized cloth according to any one of claims 1 to 4, wherein a surface coat layer containing a rubber material or a resin material is provided on a surface of the base fabric opposite to the surface on which the rubber layer is laminated. .. The rubberized cloth according to any one of claims 1 to 5, which shows a white tint when observed from the colored rubber layer side . A tent provided with the rubberized cloth according to any one of claims 1 to 6.
Air pillar and
An air tent characterized by having. The rubberized cloth is provided with a colored rubber layer containing a colorant having a color different from that of the hiding pigment and a rubber material on the surface on the rubber layer side.
The air tent according to claim 7, wherein the base cloth and the colored rubber layer are both white.

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