KR101842252B1 - Manufacturing method of anti-adhesive rubber roll - Google Patents

Abstract

The present invention relates to a non-tacky rubber roll used for an optical film, an LCD field, an electronic component, precision parts, and the like. The rubber roll is coated on the surface of a rubber roll to produce a rubber roll having excellent non-tackiness and heat resistance, Which is capable of minimizing the deformation of the rubber roll, and rubber roll by the method.
According to the present invention, rubber rolls having excellent non-tackiness and heat resistance can be produced by coating rubber roll surfaces with Teflon.
Further, according to the present invention, by forming the V-shaped groove on the outer circumferential surface of the rubber for bonding, it is possible to strengthen the adhesive strength to the secondary-coated rubber for outerwear and minimize deformation of the rubber roll.

Description

Technical Field [0001] The present invention relates to a manufacturing method of an anti-adhesive rubber roll,

The present invention relates to a non-tacky rubber roll used for an optical film, an LCD field, an electronic component, precision parts, and the like. The rubber roll is coated on the surface of a rubber roll to produce a rubber roll having excellent non-tackiness and heat resistance, And more particularly, to a method of manufacturing non-tacky rubber rolls capable of minimizing deformation of the rubber rolls.

Generally, synthetic rubber films, paper and steel making, and the like use rubber rolls that are conventionally rotated to transport articles such as paper, synthetic resin films, steel plates, films, and sheets in accordance with the manufacturing process. Such rubber rolls are manufactured in various shapes and various materials according to the application to be used, and are usually manufactured by coating the rubber surface of the Soviet Union and the kneading process on the surface of the roll, followed by vulcanization and polishing.

However, the rubber roll of the prior art is formed with fine protrusions on the surface of the rubber roll due to foreign substances such as fine dust and dust which can not be removed during the compounding process of the raw material. Such protrusions are used for producing products There is a fear of causing defects or deterioration in quality.

In addition, when the rubber layer is coated on the roll surface due to insufficient elasticity, the rubber roll of the prior art is hard to adhere to the metal roll, and even if the roll is adhered, the rubber layer is fundamentally hardly coated it's difficult. In this case, there is a disadvantage that the rubber layer is separated from the surface of the metal roll, resulting in relatively short product life. On the other hand, when a rubber layer having excellent elasticity and adhesion is coated to enhance the adhesion between the metal roll and the rubber layer, the adhesion between the metal roll and the rubber layer is excellent, but the rubber raw material having excellent adhesion has a high aging speed, There is a problem that foreign matter adheres and the cleaning is troublesome.

In addition, rubber used for industrial purposes generally has a three-dimensional net structure formed by sulfur bridges occurring in raw materials when sulfur is added to natural raw materials in which thousands of isoprene units are tangled in a state in which threads are tangled. And the molecular weight of the vulcanized rubber is nearly infinitely increased. As a result, the amount of sulfur added to the raw rubber is controlled to control the elasticity of the rubber.

The vulcanized rubber is made into a state having permanent elasticity after the vulcanization process, but has a disadvantage in that it has poor heat resistance and chemical resistance. Therefore, when the rubber vulcanized rubber is exposed to high temperature or various industrial chemicals, chemicals or oils for a long time, The life is shortened. In addition, due to the tackiness of the rubber, various foreign matters adhere to the surface of the roll to shorten the life of the roll.

The present invention is to provide a method for producing non-tacky rubber roll having excellent non-tackiness and heat resistance by coating rubber roller surface with Teflon.

The present invention also provides a method of manufacturing non-adhesive rubber rolls in which the deformation of rubber rolls can be minimized while enhancing the adhesive strength to the rubber for outerwear which is secondarily coated by forming V-shaped grooves on the outer circumferential surface of the rubber layer for bonding.

The method of manufacturing non-tacky rubber roll according to an embodiment of the present invention includes the steps of: preparing rubber using the blended rubber raw material; applying an adhesive to the roll surface after the roll surface treatment; A step of covering the rubber layer, a step of forming a rubber roll by coating the rubber layer for outer surface with the rubber layer for bonding, vulcanizing the rubber roll, polishing the surface of the rubber roll after the vulcanization step, Coating the rubber roll surface of the post-processed rubber with Teflon, and inspecting and packaging the roll coated with Teflon.

Further, after the step of coating the adhesive rubber layer, it is preferable to form a V-shaped groove in the surface of the adhesive rubber layer.

The step of vulcanizing the rubber roll is divided into a first vulcanization step and a second vulcanization step.

The first vulcanization step and the second vulcanization step are carried out at a temperature of 140 to 160 ° C and a pressure of 4 to 6 kg / cm ² for 13 to 15 hours.

Further, in the step of vulcanizing the rubber roll, it further includes a step of cooling for 20 to 24 hours after the first vulcanizing step and the second vulcanizing step.

The step of polishing the surface of the rubber roll is divided into a first polishing step and a second polishing step.

It is preferable that the second polishing step is performed stepwise three times.

The rubber material may be at least one selected from the group consisting of natural rubber, synthetic natural rubber, styrene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, hyaluron rubber, acrylic rubber, urethane rubber, silicone rubber, Or the like.

Further, the step of producing the rubber is produced by extruding the compounded rubber raw material after Soviet Union and kneading.

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According to the present invention, rubber rolls having excellent non-tackiness and heat resistance can be produced by coating rubber roll surfaces with Teflon.

Further, according to the present invention, by forming the V-shaped groove on the outer circumferential surface of the rubber for bonding, it is possible to strengthen the adhesive strength to the secondary-coated rubber for outerwear and minimize deformation of the rubber roll.

1 is a flowchart showing a method of manufacturing non-adhesive rubber roll according to an embodiment of the present invention.
2 is a perspective view showing a non-adhesive rubber roll according to the present invention.
3 is a front view showing a state in which a V-shaped groove is formed on a surface of a rubber layer for bonding according to an embodiment of the present invention.
Fig. 4 is a front view showing that the rubber layer for the outer layer of the non-tacky rubber roll according to the present invention is covered.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. In the following description, it is assumed that a part is connected to another part, But also includes a case in which other media are connected to each other in the middle. In the drawings, parts not relating to the present invention are omitted for clarity of description, and like parts are denoted by the same reference numerals throughout the specification.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

One. Non-sticky Rubber roll  Manufacturing method

Hereinafter, a method for manufacturing non-tacky rubber roll according to an embodiment of the present invention will be described in more detail.

The present invention relates to a non-tacky rubber roll used for an optical film, an LCD field, an electronic component, precision parts, and the like. The rubber roll is coated on the surface of a rubber roll to produce a rubber roll having excellent non-tackiness and heat resistance, Which is capable of minimizing the deformation of the rubber roll, and rubber roll by the method.

First, referring to FIG. 1, a method for manufacturing non-adhesive rubber rolls according to an embodiment of the present invention will be described. 1 is a flowchart showing a method of manufacturing non-adhesive rubber roll according to an embodiment of the present invention.

The method of manufacturing non-tacky rubber roll according to the present embodiment includes a step (S100) of producing rubber using a blended rubber raw material, a step (S200) of applying an adhesive to the roll surface after the roll surface treatment (S200) (S400) of covering the rubber layer for outerwear with the adhesive rubber layer (S400), vulcanizing the rubber roll (S500), and pressing the surface of the rubber roll after the vulcanization step (S700); coating the surface of the rubber roll (S800) with Teflon (S800); inspecting and packaging the roll coated with the Teflon (S900 ).

In the step S100 of producing the rubber using the blended rubber raw material, the blended rubber raw material is firstly kneaded and kneaded. The Soviet Union cuts the molecular chains of rubber raw materials to lower the elasticity, imparts plasticity and tackiness, and transforms the properties so as to be suitable for various processing operations to be performed thereafter. The rubber raw material after Soviet processing cuts molecular chains and reduces elasticity and becomes uniform. The Soviet Union may use the Soviet or Soviet methods, but in the present invention it is preferable to use the Soviet Union using the Soviet method. In the chemical Soviet Union, it can be carried out by adding disaccharides such as disulfide system BAPS, ADS and aromatic mercaptane system PCTP. Soviet work is an important process that affects the tackiness and physical properties of rubber and the subsequent extrusion process and vulcanization process.

After completing the Soviet process of the raw rubber, the raw rubber is kneaded. Kneading is a process for uniformly dispersing a compounding agent and a filler in a rubber raw material using a mixer. In the kneading process, the compounding agent and the filler are uniformly distributed to the raw rubber, and when the kneading process is improperly completed, the characteristics of the rubber in the vulcanizing step may be deformed, which is not preferable. The kneaded raw rubber is extruded and formed into a thin sheet form. The method of kneading and extruding the raw material rubber is not particularly limited, and the kneading and extruding methods usually used in the art can be selectively used. Thereafter, the extruded rubber is aged at 250 캜.

The rubber raw materials to be used in the present invention include natural rubber, synthetic natural rubber, styrene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, hyaluron rubber, acrylic rubber, urethane rubber, It is preferable to use any one selected from RTV rubber.

Next, the roll core 10 is subjected to a surface treatment and a step S200 of applying an adhesive to the surface of the roll core 10 is performed. Although the roll core 10 used in this step is formed in a long cylindrical shape and is preferably made of a metal material, the material of the roll core 10 is not necessarily limited thereto. If the rubber is a material that can be easily adhered to the surface, Materials commonly used in the industry can be selectively used. The roll core 10 forms a fine thread on its surface to widen the surface area, and the surface treatment of the roll core 10 is performed using a general surface treatment method. The surface-treated roll core 10 is coated with an adhesive after cleaning. At this time, the surface area where the adhesive is applied due to the fine thread formed on the surface of the roll core 10 is increased, so that the adhesive strength between the roll core 10 and the rubber layer can be increased.

Thereafter, a step (S300) of covering the rubber layer 20 for bonding to the roll core 10 to which the adhesive is applied is performed. The step S300 of covering the rubber layer 20 for bonding is a step for forming the rubber layer 20 for bonding on the outer circumferential surface of the roll core 10 to which the adhesive is applied. The adhesive rubber used in the step of covering the rubber layer 20 for bonding is a rubber layer having a property of being excellent in adhesion to a metal material so that the roll core 10 is adhered to the rubber layer coated with the rubber core 10 Cover the rubber sheet produced using the rubber raw material. It is preferable to use natural rubber or synthetic natural rubber for the adhesive rubber used in the step S300 of covering the rubber layer 20 for bonding, but the kind of rubber is not limited thereto, Can be selectively used. It is possible to prevent the rubber layer 20 for bonding and the roll core 10 from being easily separated from each other when the rubber roll is used by first coating the rubber layer 20 for bonding, which has good adhesion to the roll core 10 made of metal, as in the present invention.

In the step S300 of covering the adhesive rubber layer 20, the adhesive rubber layer 20 coated on the roll core 10 may form a V-shaped groove on the surface. 3 is a front view showing a state in which a V-shaped groove is formed on a surface of a rubber layer for bonding according to an embodiment of the present invention. 3, when the V-shaped groove is formed on the surface of the adhesive rubber layer 20, the surface area of the rubber layer for bonding 20 increases due to the V-shaped groove, Can be improved. Because of such an adhesive strength improvement, separation of the rubber layer for bonding 20 from the rubber layer for outer layer 30 can be prevented even when the rubber roll is used for a long time, and the life of the rubber roll is increased.

3, when the rubber roll is rotated in the clockwise direction A, the V-shaped groove formed in the rubber layer for bonding 20 forms a V-shaped groove in the B- A force is applied to the rubber layer 30 for the outer layer so that the rubber layer 30 for outer layer is collected in the roll axis inward. When rubber roll is used for a long period of time, the rubber roll is liable to slacken in the outer direction of the roll, thereby shortening the life of the rubber roll. In the present invention, the V-shaped grooves are formed in the rubber layer for bonding 20 so that the rubber layer 30 for the outer layer is gathered in the inner direction of the roll axis when the rubber roll is rotated, .

The rubber layer 20 for bonding is coated and then the rubber layer for outerwear is coated on the rubber layer 20 for bonding to form rubber rolls (S400). The rubber roll manufacturing step (S400) is a step for forming the rubber layer for outerwear 30 on the rubber layer 20 for bonding. The rubber for the outer layer used in the rubber roll manufacturing step (S400) covers the rubber sheet produced by using the rubber raw material having excellent heat resistance and durability. The outer rubber used in the rubber roll manufacturing step (S400) is preferably ethylene propylene rubber, hyaluron rubber, or fluorine rubber. However, the type of rubber is not limited thereto, and rubber raw materials having excellent heat resistance and durability Can be selectively used.

In the present invention, the roll core 10 and the rubber layers 20 and 30 (hereinafter, also referred to as " rubber layer ") are formed by first coating the rubber layer 20 for adhesion, which is excellent in adhesion to the roll core 10, and secondarily covering the rubber layer 30 for the surface layer excellent in heat resistance and durability. Can be prevented from being deviated, and rubber rolls excellent in heat resistance and durability can be produced. By forming the V-shaped grooves in the bonding rubber layer 20, it is possible to improve the adhesive force with the rubber layer for outerwear 30 and to improve the effect of gathering the rubber layer 30 for the outer layer in the inner direction of the roll axis The rubber roll is prevented from being slackened in the outer direction of the roll shaft.

The rubber roll covered with the rubber layer for outer layer 30 (S400) is subjected to a process of uniformly forming the rubber layer surface by rapping the rubber roll surface before performing the vulcanization step. Since the roughened rubber layer is in an uneven surface up to the step of forming the rubber roll by coating the rubber layer for the outer layer (S400), it is preferable that the outer surface is uniformly formed through the lapping operation. Further, It is difficult to uniformly form the rubber layer because the rubber is stretched by the heat, so that the rubber can be prevented from stretching through the lapping operation and the density of the coated rubber layer can be kept constant.

Next, vulcanizing the rubber roll (S500) is performed. The step of vulcanizing the rubber roll (S500) may be carried out once according to the use of the rubber roll, but in the present invention, it is preferable to carry out the first vulcanization step and the second vulcanization step twice.

Vulcanization is a process for bonding rubber to sulfur to cure the rubber to show the mechanical properties of the rubber. The first vulcanization is carried out at a temperature of 140 to 160 ° C and a pressure of 4 to 6 kg / cm ² for 13 to 15 hours. After completion of the vulcanization process, the vulcanized rubber is cooled in a kiln for 3 hours, and then the vulcanization tube is opened. The rubber that has undergone the first vulcanization process is cooled by natural drying for 20 to 24 hours. The cooling time is preferably 20 to 24 hours. However, the cooling time may be varied and controlled depending on the surrounding environment and temperature.

After the first vulcanization, the second vulcanization step is carried out. The second vulcanization is carried out at a temperature of 140 to 160 ° C and a pressure of 4 to 6 kg / cm ² for 13 to 15 hours. After completion of the vulcanization process, the vulcanized rubber is cooled in a kiln for 2 hours, and then the vulcanization tube is opened. The rubber that has undergone the second vulcanization process is cooled by natural drying for 20 to 24 hours. The cooling time is preferably 20 to 24 hours. However, the cooling time may be varied and controlled depending on the surrounding environment and temperature. In the vulcanization step (S500), when the vulcanization temperature is increased, the vulcanization time can be shortened. However, when the temperature is increased, the thermal stability of the rubber is adversely affected and the crosslinking structure of the rubber is changed. Can lead to a decline. Therefore, in the vulcanization step (S500), the vulcanization temperature is preferably maintained at 140 to 160 ° C.

Vulcanization of rubber (S500) may have a negative effect on the performance of the rubber roll product due to unvulcanized unvulcanized rubber remaining in the first vulcanization only. However, if the vulcanization is carried out up to the second vulcanization step, the unvulcanized rubber which has not been vulcanized in the first vulcanization step can be vulcanized again in the second vulcanization step to minimize the proportion of the uncured vulcanized rubber, It is preferable to carry out the vulcanization step.

The vulcanizing step may be carried out by selectively vulcanizing a vulcanization process commonly used in the art such as press vulcanization, open vulcanization, continuous vulcanization and cold vulcanization depending on the use of rubber rolls Can be used.

After the vulcanizing step (S500), the rubber roll is subjected to aging and roughing, and then the step of polishing the rubber roll surface (S600) is performed. In the present invention, the step of polishing the rubber roller surface is preferably divided into a first polishing step and a second polishing step twice. The first polishing step uses a polishing machine to perform primary polishing for 1 to 2 hours. After the first polishing is completed, the second polishing step is performed. It is preferable that the second polishing is performed stepwise by adjusting the roughness differently three times. In the second polishing, polishing is first performed at 30 탆 for 0.5 to 1 hour, at 20 탆 for 1 to 1.5 hours and at 15 탆 for 2 to 3 hours. In the present invention, by performing polishing of the rubber rolls in steps, the surface of the rubber rolls can be further smoothly and precisely polished so that rubber rolls of excellent quality can be produced.

After polishing, the rubber roll is subjected to a finishing step (S700) to create grooves depending on the application. The grooves generated in the post-finishing step S700 may include diamond grooves, circular segmenting, horizontal grooves, spiral flute end-to end, ) Groove (Herringbone (Chevron) Groove), Spiral Serration (Spiral Serration) and can produce various grooves depending on the use of rubber roll.

Next, a step (S800) of coating the rubber roll surface of the post-processed rubber with Teflon is performed. Teflon is a very stable compound due to the strong chemical bonding between fluorine and carbon, and has nearly complete chemical resistance, non-tackiness and low coefficient of friction. In the present invention, it is possible to manufacture rubber rolls excellent in non-tackiness by coating the rubber with the Teflon, so that it is possible to easily remove foreign matters on the surface after use of rubber rolls and to easily wash the rubber rolls, thereby prolonging the life of the rubber rolls. In addition, due to the Teflon coating, heat resistance is enhanced and it can be used at a high temperature of about 300 ° C. It is preferable to coat Teflon with rubber roller by coating with PTFE (Poly Tetra Fluoro Ethylene), FEP (Fluorinated Ethylene Propylene Copolymer), PFA (Perfluoro Alkoxy) or ETFE (Ethylene Tetra Fluoro Ethylene) But it is not limited thereto and coating methods commonly used in the art can be selectively used.

The rubber roll completed with the Teflon coating is subjected to a washing process, and the rubber roll is completed by inspecting and packing the rubber roll with a buffer material.

2. Non-sticky Rubber roll

First, referring to FIG. 2, a non-stick rubber roll according to an embodiment of the present invention will be schematically described. 2 is a perspective view showing a non-adhesive rubber roll according to the present invention.

The non-tacky rubber roll according to an embodiment of the present invention comprises a roll core 10, a rubber layer 20 for bonding, which is coated on the outer circumferential surface of the roll core 10 and has a V-shaped groove formed on its surface, (30) coated on the outer circumferential surface of the outer layer (20), and a coating layer (40) coated on the outer circumferential surface of the outer layer rubber layer (30).

Hereinafter, the components of the non-adhesive rubber roll according to the present invention will be described in detail.

The roll core 10 is formed in a long cylindrical shape and is preferably made of a metal material. However, the material of the roll core 10 is not limited thereto. If the rubber is a material that can be easily adhered to the surface, Materials commonly used can be selectively used. A fine thread is formed on the surface of the roll core 10 so as to increase the adhesive force with the rubber 20 to be coated on the outer circumferential surface of the roll core 10. The surface area at which the adhesive is applied due to the fine thread of the surface of the roll core 10 is increased and the adhesion between the roll core 10 and the rubber layer 20 for adhesion can be increased.

A rubber layer 20 for bonding is coated on the outer circumferential surface of the roll core 10 and a V-shaped groove is formed on the surface of the rubber layer 20 for bonding. 3 is a front view showing a state where a V-shaped groove is formed on the surface of the rubber layer for bonding 20 according to an embodiment of the present invention. The V-shaped groove formed on the surface of the adhesive rubber layer 20 increases the surface area of the rubber layer for bonding 20 and improves the adhesion with the rubber layer 30 for the outer layer which is covered thereafter. In addition, when the rubber roll is rotated in the clockwise direction A, the V-shaped groove causes a force to be applied to the rubber layer 30 for the surface layer in the B direction due to the V-shaped groove formed in the rubber layer 20 for bonding, So that the rubber layer 30 is gathered in the inward direction of the roll axis. Accordingly, in the present invention, as described above, the V-shaped groove is formed in the rubber layer 20 for bonding, and when the rubber roll is rotated, the rubber layer for outerwear 30 is gathered in the inner direction of the roll axis, It is possible to prevent the phenomenon of slackening as much as possible.

The adhesive rubber layer 20 is preferably made of natural rubber or synthetic natural rubber. However, the kind of rubber is not limited thereto, and a rubber raw material having a property of excellent adhesion with a metal material can be selectively used.

A rubber layer 30 for the outer layer is formed on the outer circumferential surface of the rubber layer 20 for bonding. 4 is a front view showing that the rubber layer 30 for the outer layer of the non-tacky rubber roll according to the present invention is covered. 4, the outer layer rubber layer 30 surrounds the outer circumferential surface of the rubber layer 30 for bonding, and thereafter grooves or patterns of various shapes may be formed on the surface of the rubber layer 30 for the outer layer according to the use of the rubber roll 30 .

It is preferable that the outer layer rubber layer 30 is coated with a rubber sheet produced using a rubber raw material having excellent heat resistance and durability. Ethylene propylene rubber, hyaluron rubber, and fluorine rubber are preferably used as the rubber for the outer layer rubber layer 30. However, the kind of rubber is not limited thereto, and rubber materials having excellent heat resistance and durability Can be selectively used.

A coating layer 40 is formed on the outer circumferential surface of the outer layer rubber layer 30. The coating layer 40 is formed of Teflon. Teflon is a very stable compound due to the strong chemical bonding between fluorine and carbon, and has nearly complete chemical resistance, non-tackiness and low coefficient of friction. In the present invention, it is possible to manufacture rubber rolls excellent in non-tackiness by coating the rubber with the Teflon, so that it is possible to easily remove foreign matters on the surface after use of rubber rolls and to easily wash the rubber rolls, thereby prolonging the life of the rubber rolls. In addition, due to the Teflon coating, heat resistance is enhanced and it can be used at a high temperature of about 300 ° C. It is preferable to coat Teflon with rubber roller by coating with PTFE (Poly Tetra Fluoro Ethylene), FEP (Fluorinated Ethylene Propylene Copolymer), PFA (Perfluoro Alkoxy) or ETFE (Ethylene Tetra Fluoro Ethylene) But it is not limited thereto and coating methods commonly used in the art can be selectively used.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. have.

10: Roll-heart
20: Rubber layer for bonding
30: Rubber layer for outer layer
40: Coating layer

Claims (11)

Preparing a rubber using the compounded rubber raw material;
Forming a screw thread on the surface of the roll mandrel so as to enlarge the surface area, and applying an adhesive to the surface of the mandrel having the screw thread;
Coating the adhesive layer with an adhesive on the roll core;
Preparing a rubber roll for covering the rubber layer for adhesion with a rubber layer for outerwear;
Wherein the rubber vulcanization step is divided into a first vulcanization step and a second vulcanization step, wherein the first vulcanization step and the second vulcanization step each have a temperature of 140 to 160 DEG C and a vulcanization degree of 4 to 6 kg / cm ² for 13 to 15 hours;
The surface of the rubber roll having undergone the vulcanization step is subjected to a polishing treatment, divided into a first polishing step and a second polishing step, and the second polishing step is carried out three times to adjust the roughness differently, step;
Finishing the rubber roll after the polishing step;
Coating the post-processed rubber roll surface with Teflon;
And inspecting and packaging the rubber roll coated with the Teflon,
In the second polishing step, the polishing is carried out stepwise for 0.5 to 1 hour at 30 占 퐉 roughness, for 1 to 1.5 hours at 20 占 퐉 roughness, and for 2 to 3 hours at 15 占 퐉 roughness. Way. The method according to claim 1,
And a step of forming a V-shaped groove on the surface of the adhesive rubber layer so as to increase the surface area of the adhesive rubber layer, thereby improving the adhesion of the rubber layer to the outer rubber layer. In addition, And the rubber roll is prevented from being slackened in the outer direction of the roll axis by exerting a function of collecting the rubber roll in the inner direction of the shaft. delete delete The method according to claim 1,
Further comprising a step of cooling the rubber roll for 20 to 24 hours after the first vulcanizing step and the second vulcanizing step in the vulcanizing step. delete delete The method according to claim 1,
The rubber raw material is selected from natural rubber, synthetic natural rubber, styrene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, haparone rubber, acrylic rubber, urethane rubber, silicone rubber, Wherein the non-tacky rubber-based rubber is one of the non-tacky rubber-based rubber. delete delete delete

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