JPH0411106B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a composite color waterproof rubber sheet. More specifically, the present invention relates to a composite color waterproof rubber sheet comprising a specially manufactured thin color sheet layer provided on the upper layer of a black waterproof rubber sheet. [Prior Art] Tarpaulin sheets are used for a long period of time as water-shielding sheet materials for outdoor roofs, scenic ponds, waste storage facilities, and the like. Therefore, the waterproof sheet needs to have excellent weather resistance and mechanical strength. Waterproof sheets with excellent weather resistance and mechanical properties include black waterproof plastic sheets containing carbon black or black waterproof rubber sheets. This is because carbon black is a filler that has an excellent reinforcing effect and weather resistance, and for this reason, the tarpaulin sheet that is generally widely used is the black tarpaulin sheet. However, a black tarpaulin sheet is not a hue that is aesthetically pleasing to the general public. Therefore, there is a trend in recent years that colored tarpaulin sheets are being used instead of black tarpaulin sheets on building rooftops, beautiful ponds, etc. Now, color waterproof sheets include color waterproof plastic sheets and color waterproof rubber sheets. Although colored waterproof plastic sheets exhibit vivid colors, their drawback is that they are not sufficiently weather resistant. On the other hand, colored waterproof rubber sheets have a disadvantage in that they have inferior mechanical strength and weather resistance compared to black waterproof rubber sheets containing carbon black, and moreover, cannot produce clear colors. The reason why clear colors cannot be obtained is that the rubber itself has an indistinct color and requires a high-temperature vulcanization process, which causes discoloration of the rubber itself and the coloring agent, and also due to exposure to sunlight, wind and rain. This is because discoloration and fading progress due to the accumulation of environmental pollutants, etc. Therefore, there is a need for a colored waterproof rubber sheet that has excellent weather resistance and mechanical properties and exhibits vivid colors. By the way, conventional composite color waterproof rubber sheets have been made by coating a black waterproof rubber sheet containing carbon black with color paint, or by pasting together ordinary colored rubber sheets. However, a black waterproof rubber sheet containing carbon black coated with a color paint has the disadvantage that the color paint layer is easily discolored and, furthermore, the appearance is poor due to adhesive peeling between the waterproof rubber sheet and the color paint film. In addition, in a black waterproof rubber sheet containing carbon black, which is made by laminating colored rubber sheets together, the colored rubber sheet layer develops minute tortoise-shell-shaped cracks due to exposure to sunlight, and rainwater enters the cracks and prevents the colored rubber sheet layer from flowing out. It is an invitation.
For this reason, in a black waterproof sheet containing carbon black, which is made by laminating colored rubber sheets, it is necessary to make the upper color rubber sheet layer thicker and the lower black waterproof sheet layer containing carbon black relatively thin. A decrease in mechanical strength and weather resistance is inevitable. In this case, if a color rubber sheet layer with excellent weather resistance and extremely thinness is used, the black waterproof sheet layer containing carbon black will be relatively thick, and a composite color waterproof rubber sheet with excellent mechanical strength and weather resistance will be obtained. Be expected.
However, with the conventional techniques, it has not been possible to obtain a color rubber sheet that is extremely weather resistant, extremely thin, and has excellent adhesion so as to be laminated onto a carbon black-containing black waterproof rubber sheet layer. This is because chlorosulfonated polyethylene rubber sheets are essentially the only color rubber sheets that are excellent in weather resistance, vividly colored, and extremely thin. In other words, since chlorosulfonated polyethylene rubber has rubber elasticity and plastic properties, it can be colored as vividly as plastic materials, but on the other hand, chlorosulfonated polyethylene rubber has a high roll kneading temperature, and as a result, it cannot be used with a calendar roll. When the color sheet is taken out during operation, it sticks to the roll, making it difficult to obtain an extremely thin color sheet with a uniform thickness in the longitudinal direction. [Problems to be Solved by the Invention] The present invention has been made based on the above points, and its purpose is to eliminate the drawbacks of the prior art described above, and to provide bright coloring, weather resistance and An object of the present invention is to provide a composite color waterproof rubber sheet with excellent mechanical strength. [Means for Solving the Problems] The gist of the present invention is that the upper layer of a black waterproof ethylene propylene diene rubber sheet containing carbon black or a black waterproof ethylene propylene diene rubber-butyl rubber blend rubber sheet containing carbon black has a thickness. A composite color waterproof rubber sheet characterized by being provided with a 0.05 to 0.3 mm colored chlorosulfonated polyethylene rubber sheet layer produced by the topping method. In the present invention, the lower layer carbon black compounded black waterproof rubber sheet is limited to a carbon black compounded black waterproof ethylene propylene diene rubber sheet or a carbon black compounded black waterproof ethylene propylene diene rubber-butyl rubber blend rubber sheet because both of these two are limited. Excellent weather resistance,
This is because it maintains mechanical strength and exhibits excellent adhesiveness with the color sheet layer. In the present invention, the black waterproof ethylene propylene diene rubber-butyl rubber blend rubber sheet containing carbon black is suitably a blended rubber in which 5 to 45% butyl rubber is blended with ethylene propylene diene rubber. Here, the reason why the blending amount of butyl rubber in the carbon black-containing black waterproof ethylene propylene diene rubber - butyl rubber blend rubber sheet was desirably 5 to 45% was to take into account the adhesion with the butyl rubber gummed tape during the work of connecting the sheet ends. be. In order to exhibit sufficient weather resistance and mechanical properties, these rubber sheets should preferably be in a vulcanized state when made into a composite color waterproof rubber sheet. In the composite color waterproof rubber sheet of the present invention,
A foamed polymer sheet with excellent heat insulation properties is placed on the side where the color sheet layer of the black waterproof ethylene propylene diene rubber sheet containing carbon black or the black waterproof ethylene propylene diene rubber sheet containing carbon black - butyl rubber blend rubber sheet used as the lower layer is not pasted. You can also glue layers together. As the foamed polymer sheet, a foamed polyethylene sheet, a foamed polypropylene sheet, a foamed polystyrene sheet, etc. can be used. In the present invention, the carbon black compounded in these black waterproof rubber sheets may be any carbon black that has a large reinforcing effect and excellent weather resistance.
For example, HAF black, FEF black, etc. can be used. Further, a vulcanizing agent, a filler, a softening agent, etc. can be appropriately blended into these black waterproof rubbers. In the present invention, the color sheet provided on the carbon black waterproof ethylene propylene diene rubber sheet or the carbon black black waterproof ethylene propylene diene rubber-butyl rubber blend rubber sheet layer is limited to a colored chlorosulfonated polyethylene rubber sheet manufactured by the topping method. This is because the coloring is clear, the weather resistance and mechanical properties are excellent, the thickness can be made extremely thin, and the adhesiveness with the underlying sheet is excellent. In addition, the reason why the thickness of the topping color sheet is limited to 0.05 to 0.3 mm is that if it is less than 0.05 mm, it will be too thin and the coloring properties, weather resistance, and mechanical properties will deteriorate rapidly. If it exceeds mm, the thickness of the lower carbon black waterproof chlorosulfonated polyethylene rubber sheet layer will be relatively reduced, and as a result, the weather resistance and mechanical properties of the composite color waterproof rubber sheet will be significantly reduced. It is. In the present invention, the color sheet is limited to a colored chlorosulfonated polyethylene rubber sheet produced by the topping method, because an extremely thin color sheet can be obtained as a long sheet without deformation, and the obtained color sheet can be coated with a topping cloth. This is because it can completely prevent contamination and strongly adhere to the lower layer of the black waterproof ethylene propylene diene rubber sheet containing carbon black or the black waterproof ethylene propylene diene rubber-butyl rubber blend rubber sheet layer containing carbon black. This topping method produced color chlorosulfonated polyethylene rubber sheet is produced by kneading unvulcanized color chlorosulfonated polyethylene rubber compound with a hot calendar roll to a thickness of 0.05~
It is produced by drawing out a 0.3 mm high-temperature color sheet, rolling it up together with a topping cloth such as polyester cloth, polyamide cloth, etc., and storing it as it is. These colored chlorosulfonated polyethylene rubber sheets produced by the topping method can be vividly colored in any color such as red, blue, yellow, green, brown, etc. by blending an appropriate amount of a suitable pigment. In the present invention, the lower layer carbon black-containing black waterproof ethylene propylene diene rubber sheet or the carbon black compound black waterproof ethylene propylene diene rubber-butyl rubber blend rubber sheet layer and the upper layer topping color sheet are bonded together using an adhesive. However, desirably, after being crimped with a pressure roll, the material is vulcanized and bonded by passing it through a high-temperature vulcanizing cylinder. After crimping with this pressure roll, in order to vulcanize and bond, first prepare a waterproof black ethylene propylene diene rubber sheet containing carbon black or a black waterproof ethylene propylene diene rubber sheet containing carbon black ~ butyl rubber blend rubber blend at a high temperature from a feeding device or extruder. The rubber sheet is fed out, and at the same time, a colored chlorosulfonated polyethylene rubber sheet manufactured by the topping method is fed out from another feeding device while the topping cloth is peeled off, and then these are fed between pressure rolls so as to overlap, and crimped. The material is vulcanized and bonded by passing it through a high-temperature vulcanizing cylinder. In addition, after laminating a foamed polymer sheet layer on one side of a black waterproof ethylene propylene diene rubber sheet containing carbon black or a black waterproof ethylene propylene diene rubber sheet containing carbon black - butyl rubber blend rubber sheet, a layer of foamed polymer sheet is pasted on the other side with a thickness of 0.05 ~ It can also be a composite color waterproof rubber sheet provided with a 0.3 mm topping color sheet layer. This composite color waterproof rubber sheet with a foamed polymer sheet layer has insulation properties due to the foamed polymer layer, as well as excellent stress relaxation properties against expansion and contraction caused by day and night heat cycles.As a result, the upper layer topping The lifespan of the color sheet layer can be effectively extended. [Function] The composite colored waterproof rubber sheet of the present invention uses a colored chlorosulfonated polyethylene rubber sheet manufactured by the topping method as the color sheet layer, thereby cleverly taking advantage of the protective effect of the topping cloth to be extremely thin and stretchable in the longitudinal direction. It has a uniform thickness and is free from thermal deformation and damage, and the topping cloth completely prevents oxidative deterioration and contaminant adhesion deterioration, and exhibits clear coloring and adhesion. By limiting the thickness of the chlorosulfonated polyethylene rubber sheet to 0.05 to 0.3 mm, the lower layer to be laminated is a black waterproof ethylene propylene diene rubber sheet containing carbon black or a black waterproof ethylene propylene diene rubber to butyl rubber blend rubber sheet layer containing carbon black. As a result, due to the synergistic effect of these components, the color chlorosulfonated polyethylene rubber sheet produced by the topping method is converted into a black waterproof ethylene propylene diene rubber sheet with carbon black or a black waterproof ethylene propylene diene rubber sheet with carbon black to butyl rubber. It is strongly vulcanized and adhered to the blended rubber sheet layer, completely blocking oxygen and rainwater from penetrating the adhesive interface, and exhibiting clear color retention, excellent weather resistance, and mechanical properties. [Example] Next, an example of the composite color waterproof rubber sheet of the present invention will be described. FIG. 1 is a sectional view showing an embodiment of the composite color waterproof rubber sheet of the present invention. In FIG. 1, numeral 1 is a lower layer of a waterproof black ethylene propylene diene rubber sheet layer containing carbon black, and numeral 2 is an upper layer of a colored chlorosulfonated polyethylene rubber sheet produced by the topping method. In the production of the composite color waterproof rubber sheet of the present invention, first, a high-temperature unvulcanized carbon black-containing black waterproof ethylene propylene diene rubber sheet is fed out using a feeding device, and at the same time, a color chloride rubber sheet manufactured by the topping method is fed out using another feeding device. The sulfonated polyethylene rubber sheet is fed out while peeling off the topping cloth, and then these two sheets are fed into a pressure roll so as to overlap and are crimped.Then, the crimped sheet is passed through a high temperature vulcanizing cylinder. Pass it through and vulcanize it. Appropriate temperatures within the vulcanization cylinder are 80 to 220°C and pressures are 1 to 50 kg/cm ² . The following table shows the lower carbon black-containing black waterproof chlorosulfonated polyethylene rubber sheet layer,
Composite color waterproof rubber sheets were prepared by varying the thickness of the upper layer of colored chlorosulfonated polyethylene rubber sheets produced by the topping method, and their colorability, weather resistance, and tensile strength were measured.

【table】

[Table] [Note] Lower layer and upper layer materials (1) Lower layer and upper layer materials of Comparative Examples 1 to 3 and Examples 1 to 4 Lower layer: Black waterproof ethylene propylene diene rubber sheet layer containing carbon black Upper layer: Color chlorine manufactured by topping method Sulfonated polyethylene rubber sheet layer (2) Lower and upper layer materials of Comparative Example 4 Lower layer: Black waterproof ethylene propylene diene rubber sheet layer containing carbon black Upper layer: Colored ethylene propylene diene rubber sheet layer Colorability test method JIS-K-5400-1979 Tested according to. Weather resistance test method: Using Sunshine Weather-Ometer irradiation equipment,
Black panel temperature 63℃, rain cycle 18 minutes/
The test was conducted for 120 minutes, and the state of discoloration and the occurrence of cracks were observed. Tensile strength test method (mechanical properties) Tested according to JIS-K-6301-1975. As can be seen from the table, in the composite color waterproof rubber sheets of Comparative Examples 1 and 2, in which the color chlorosulfonated polyethylene rubber sheet layer produced by the topping method in the upper layer is 0.05 mm or less, the upper layer is too thin, resulting in poor colorability and cannot be put to practical use. On the other hand, Comparative Example 3 where the upper topping color sheet layer is 0.3 mm or more
In the composite color waterproof rubber sheet, the upper layer is too thick, which improves the colorability, but the lower layer, the black waterproof ethylene propylene diene rubber sheet containing carbon black, becomes relatively thin, and as a result, the weather resistance and mechanical properties suddenly deteriorate. Getting worse. The composite color waterproof rubber sheet of Comparative Example 3, in which the lower layer was a carbon black-containing black waterproof ethylene propylene diene rubber sheet layer and the upper layer was a colored ethylene propylene diene rubber sheet layer, had good coloring properties but extremely poor weather resistance, causing cracks and discoloration. occurs in a short period of time. On the other hand, the composite color waterproof rubber sheets of Examples 1 to 4 of the present invention exhibited excellent results in terms of colorability, weather resistance, and tensile strength. Although not listed in the table, as a result of long-term outdoor exposure tests, it was confirmed that the composite color waterproof rubber sheets of Examples 1 to 4 exhibited extremely excellent weather resistance and color retention. Ta. Further, FIG. 2 shows another embodiment of the composite color waterproof rubber sheet of the present invention, in which 1 is the lower layer of a black waterproof ethylene propylene diene rubber sheet layer containing carbon black, and 2 is the topping method of the upper layer. Manufactured color chlorosulfonated polyethylene rubber sheet layer 3 is a foamed polymer sheet layer pasted on the side to which the color sheet is not pasted. This example product has insulation properties due to the foamed polymer layer.
It has excellent stress relaxation properties and moisture absorption relaxation properties, and as a result, weather resistance and durability life can be further improved. [Effects of the Invention] The composite color waterproof rubber sheet of the present invention is a waterproof rubber sheet with extremely clear coloring and excellent weather resistance and mechanical strength, and is industrially useful.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the composite color waterproof rubber sheet of the present invention, and FIG. 2 is a sectional view showing another embodiment of the composite color waterproof rubber sheet of the present invention. 1: Black waterproof ethylene propylene diene rubber sheet layer containing carbon black, 2: Color chlorosulfonated polyethylene rubber sheet layer produced by topping method, 3: Foamed polymer sheet layer.

Claims (1)

[Claims] 1. In a composite color waterproof rubber sheet comprising a color sheet layer provided on the upper layer of a black waterproof ethylene propylene diene rubber sheet containing carbon black or a black waterproof ethylene propylene diene rubber sheet containing carbon black - butyl rubber blend rubber sheet, the color sheet layer has a thickness is 0.05~0.3mm
A composite colored waterproof rubber sheet characterized by being a colored chlorosulfonated polyethylene rubber sheet produced by the topping method.