CN1099330A

CN1099330A - Preparation of silicone rubber roll

Info

Publication number: CN1099330A
Application number: CN 93111947
Authority: CN
Inventors: 付琼
Original assignee: SHUDI NEW MATERIAL INST QINGYANG DISTRICT CHENGDU CITY
Current assignee: SHUDI NEW MATERIAL INST QINGYANG DISTRICT CHENGDU CITY
Priority date: 1993-08-27
Filing date: 1993-08-27
Publication date: 1995-03-01

Abstract

The present invension provides suitable for large sized and small sized heat-resistant silastic roller, and in which roller is made by use of double composition room temperature vulcanized silastic rubber as raw material through pouring into a mould with roller core, the mould is a cylindrical vessel with upper and bottom covers and has an upper fixed plate with holes and a lower fixed plate, and then vacuum debubbling, solidifying at room temperature, demoulding, and polishing. It features tight adhesion between silastic layer and core, without bubbles, simple equipment, easy operation, the Shore's hardness of the product can be chosen in the range of A40-85.

Description

Preparation of silicone rubber roll

The present invention relates to a kind of preparation method of Heat-resisting rubber roller.

Silicon rubber has good high temperature resistant, resistance to low temperature and release property, so be widely used in during the rubber roll of high temperature resistant and the demoulding produces domestic also existing development (" organosilicon material and application " 1989 the 1st phase the 3rd page) abroad.

In the preparation of silicone rubber roll, except the performance of sizing material, the preparation method also directly influences the quality of rubber roll.The external method of using has the coating of high-temp glue, extruding of the injection of liquid silastic and room temperature glue, but these all need big equipment investment, and injection and extrusion method only are suitable for the preparation of the small sized cot on duplicator or the printing machine, are suitable for the large-scale flatiron rubber roll and the Compound rubber roller of plastic sheeting etc. are just little.The silicone rubber roll of domestic development and production all adopts the method for coating of high-temp glue, problem such as it is bonding not firm to exist glue-line and roller core, and glue-line easily produces bubble, and the hardness of glue is limited.

The preparation method who the purpose of this invention is to provide a kind of simple and easy to do silicone rubber roll, making the rubber roll that makes, bonding firmly glue-line does not have bubble, and can regulate the thickness of glue-line arbitrarily, and the hardness adjustable extent of glue-line is increased.

Technical scheme of the present invention is, is sizing material with the double component room temperature vulcanization silicon rubber, adopts the method for pouring or perfusion, the sizing material gradation is poured in the mould that is fixed with roller core, vacuum defoamation, cold curing is more than 24 hours, the demoulding through car, mill, makes qualified silicon rubber heat-resisting rubber roll.

The different room temperature glue of amount of filler is closed in selection, and the hardness that can regulate glue-line is in Shao Shi A40～85.

Mould can be the band metal or the plastics cylindrical container (Fig. 1) of cover plate up and down, the metal of also can packing in the container, plastics or wooden fixed head (Fig. 2).Also available board-like material that curls such as floor glue, plastic sheet, plastic foil, foamed plastics etc. are rolled into tubular round fixed head, the sideboard of outer in addition bamboo and wood, plastics, metal or glass steel supports, with rope, iron wire, cloth etc. is the static line typing, as mould, then mould is put into big container, so that vacuumize (Fig. 3, Fig. 4).The size that needs only the conversion fixed head so just can prepare the rubber roll of plurality of specifications, and does not need a lot of molds.

The rubber roll that the present invention is prepared, its glue-line and roller core are bonding firmly, and adhesive strength is more than 1.0MPa, glue-line does not have bubble, but the thickness regulated at will, hardness is adjustable in Shao Shi A40～85, and the glue-line hardness of high-temp glue coating method can only be in Shao Shi A40～65 scopes, and, method equipment needed thereby of the present invention is simple, and processing ease is reduced investment outlay, both be applicable to the small-sized rubber roll of preparation, also be fit to the large-scale rubber roll of preparation.

Fig. 1, Fig. 2 and Fig. 3 are mould schematic diagrames of the present invention, and Fig. 4 is the sideboard schematic diagram.

Wherein, 1, cover plate 2, cylindrical container 3, roller core 4, glue-line 5, vacuum tube 6, upper mounted plate with holes 7, bottom plate 8, bracing frame 9, floor glue 10, sideboard 11, static line 12, vertical bar 13, rope.

Be embodiment below.

Embodiment 1:

With the commercially available 5kg double component room temperature vulcanization silicon rubber that contains catalyst, crosslinking agent and filler, divide and pour in the mould shown in Figure 1 for three times, pour into back row under 700mmHg vacuum steeped 20 minutes at every turn, room temperature is placed the demoulding after 24 hours, and car grinding and polishing light gets φ 150mm, the rubber roll of long 600mm, glue-line does not have bubble, and the adhesive strength of glue-line and roller core is 1.2MPa, glue-line hardness Shao Shi A80.

Embodiment 2:

The commercially available 4kg double component room temperature vulcanization silicon rubber that contains catalyst, crosslinking agent and filler divided pour into for three times in the mould shown in Figure 2, pour into back row under 700mmHg vacuum steeped 20 minutes at every turn, room temperature was placed 48 hours, the demoulding, car grinding and polishing light, get φ 135mm, the rubber roll of long 700mm, glue-line does not have bubble, the adhesive strength of glue-line and roller core is 1.3MPa, and glue-line hardness is Shao Shi A70.

Embodiment 3:

The commercially available red double component room temperature vulcanization silicon rubber that contains catalyst and crosslinking agent, filler divided pour into for three times in the mould shown in Figure 3, pour into back row under 700mmHg vacuum steeped 20 minutes at every turn, room temperature was placed 72 hours, the demoulding, car grinding and polishing light, get φ 80mm, the red rubber roll of long 1000mm, glue-line does not have bubble, the adhesive strength of glue-line and roller core is 1.5MPa, and glue-line hardness is Shao Shi A50.

Claims

1, a kind of preparation method of silicone rubber roll is a sizing material with the double component room temperature vulcanization silicon rubber, it is characterized in that the sizing material gradation being poured in the mould that is fixed with roller core with pouring or instillation process, and vacuum defoamation, silicone rubber roll is prepared in the demoulding after the cold curing.

2, the preparation method of silicone rubber roll according to claim 1 is characterized in that mould is the band cylindrical container [2] of cover plate [1] up and down.

3, the preparation method of silicone rubber roll according to claim 2 is characterized in that also being equipped with in the cylindrical container [2] upper mounted plate with holes [6], bottom plate [7].

4, the preparation method of silicone rubber roll according to claim 1, it is characterized in that mould is rolled into tubular [9] by the board-like material that can curl round fixed head [6] and [7], add sideboard [10] and support, static line [11] typing is formed, and mould is put into the container of vacuum-pumping.