JPH0329575B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing an ultra-thin rubber sheet.

(Prior Art) Conventional rubber sheets are manufactured by calendering or press molding.

(Problem to be solved by the invention) However, in calendering, as the thickness becomes thinner, it wraps around the roll and becomes difficult to pull out.
There is a problem in that only rubber sheets with a thickness of about 1 mm can be manufactured.

According to press molding, prototypes of a certain size with a thickness of about 0.1 mm have been produced without any post-processing. However, it has not yet been possible to industrially produce a continuous sheet, and there is a problem in that it is not possible to produce a continuous sheet with a thickness of 0.1 mm or less without post-processing.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a method for manufacturing an ultra-thin rubber sheet that can manufacture an ultra-thin continuous rubber sheet.

(Means for Solving the Problems) In order to achieve the above object, the present invention rolls kneaded rubber into a rubber sheet having a predetermined rubber thickness using a first pair of rolls, and then rolls the kneaded rubber into a rubber sheet having a predetermined rubber thickness, and then adjusts the paper thickness of release paper and the predetermined rubber After the rubber sheet is transferred onto the release paper using a second roll pair set to have a gap equal to the thickness thereof, the rubber sheet is pulled out and vulcanized.

(Function) According to the above configuration, since the kneaded rubber is rolled into a rubber sheet with a predetermined rubber thickness by the first pair of rolls, the pressure applied when transferring to the release paper by the second pair of rolls is reduced. This prevents the adhesion of the rubber sheet to the second pair of rolls from increasing, and also allows the rubber sheet to be transferred to the release paper in the second pair of rolls. Since it can be easily pulled out from the second roll pair and vulcanized, an extremely thin continuous rubber sheet can be continuously obtained.

(Example) An example of the present invention will be described based on FIGS. 1 and 2.

The calender roll machine includes a first roll 1, a second roll 2, a third roll 3, and a fourth roll 4. These rolls 1, 2, 3, and 4 have a surface layer made of Teflon (trademark of Dupont) or nylon, which has good mold releasability.

An ultra-thin sheet of silicone rubber (rubber) 5 with a rubber thickness (predetermined rubber thickness) G of 0.05 mm and a paper thickness K of 0.1 mm.
To obtain on the release paper 6, the gap A between the first roll 1 and the second roll 2 is 0.06 mm, and the gap A between the second roll 2 and the third roll is 0.06 mm.
The gap B with the roll 3 is set to 0.05 mm, and the gap C between the third roll 3 and the fourth roll 4 is set to 0.15 mm.

The first roll 1 and the second roll 2 roll the kneaded silicone rubber 5 to a rubber thickness slightly thicker than the final predetermined rubber thickness G. As mentioned above, this rubber thickness is preferably about 1.2 times the predetermined rubber thickness G.

The second roll 2 and the third roll 3 are a pair of rollers (a first
roller pair). By gradually rolling the rubber in two stages in this way, a uniform predetermined rubber thickness G can be obtained.

The third roll 3 and the fourth roll 4 constitute a roller pair (second roller pair) that presses the silicone rubber 5 onto the release paper 6. These rollers 1, 2, 3, 4
The circumferential velocity of is constant.

The release paper 6 is transferred to the third roll 3 by the feed roller 7.
After transferring the silicone rubber 5 to the gap C between the roller and the fourth roll 4 and transferring the silicone rubber 5 thereto, the silicone rubber 5 is vulcanized, whereby an ultra-thin rubber sheet 8 of the silicone rubber 5 can be continuously obtained. . Note that the feeding speed and drawing speed of the release paper 6 are made to match the peripheral speeds of the rolls 1, 2, 3, and 4. The vulcanization conditions are approximately 10 minutes at 100°C and approximately 5 minutes at 120°C.

The ultra-thin rubber sheet 8 of the silicone rubber 5 thus obtained has excellent electrical insulation, elasticity, weather resistance, non-adhesiveness, etc., and is extremely thin, so it can be used as an insulation sheet for computer cases, an earthquake-resistant sheet, etc. It is suitable to use.

The ultra-thin rubber sheet 8 itself is extremely thin and difficult to handle, but since it is transferred to the release paper 6, it is easy to handle and can be cut into any shape for use.

The present invention can be configured in various ways other than those shown in the above embodiments. For example, as shown in FIG. 1, another sheet of release paper 9 is transferred to the gap B between the first pair of rollers 2 and 3 by the feed roller 10, and an ultra-thin rubber sheet 11 is placed between the upper and lower two sheets of release paper 6. , 9, and then pulled out from the second pair of rollers 3, 4. The paper thickness K of release paper 6 and 9 is 0.1 mm, respectively.
When the rubber thickness G is 0.05 mm, the gap A between the first roll 1 and the second roll 2 is 0.06 mm, the gap B between the first roller pair 2 and 3 is 0.15 mm, and the gap between the second roller pair 3 and 4 is It is preferable to set C to 0.25 mm. This makes it possible to reliably prevent the ultra-thin rubber sheet 11 from wrapping around the third roller, making it easier to pull out the ultra-thin rubber sheet 11 from the second pair of rollers 3 and 4. . Note that the rubber material formed into the ultra-thin continuous sheet and its release paper are not limited to those shown in the above embodiments.

(Effects of the Invention) Since the present invention has the above-described configuration and operation, it is possible to provide a method for manufacturing an ultra-thin rubber sheet that can continuously obtain an ultra-thin rubber sheet.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the present invention, Fig. 2 is a sectional view of an ultra-thin rubber sheet formed into the release paper, and Fig. 3 is a schematic diagram showing another embodiment of the invention. . 2, 3...First roller pair, 3,4...Second roller pair, 5...Rubber, 6,9...Release paper, 8,11
...Ultra-thin rubber sheet, G...Specified rubber thickness, K...
Paper thickness.

Claims (1)

[Claims] 1. Roll the kneaded rubber to a predetermined rubber thickness with a first roll pair, and then roll the rubber onto the release paper with a second roll pair set to a gap equal to the sum of the paper thickness of the release paper and the predetermined rubber thickness. A method for producing an ultra-thin rubber sheet, which comprises transferring and then pulling out and vulcanizing.