TWI439367B - Manufacturing method of silicone gel sheet - Google Patents

Description

Method for producing anthrone gel sheet

The present invention relates to a method for producing an anthrone gel sheet which is a sealing material, a cushioning material or the like, using a fluorenone gel material excellent in impact absorption, heat resistance, and weather resistance.

Because the fluorene ketone gel material is excellent in impact absorption, heat resistance, and weather resistance, it is processed into various shapes and used in electronic equipment such as personal computers, game machines, and mobile phones, or electronic products such as automobiles and robots. Parts, etc., are suitable for cushioning materials, sealing materials, insulating materials, etc. In addition, the specific adsorption property of the indole ketone gel material can be repeatedly attached, and it is a material which has characteristics such as easy peeling and no residue on the attached surface, and is also suitable as a material for an advertising medium. However, such an anthrone gel material has a characteristic adhesive property to a gel material, and since mechanical strength is weak, there will be a viewpoint of the processability of the gel material and the assembly property of the processed product using the gel material. The problem is that the product is more difficult to dispose of. Therefore, the sheet-like fluorenone gel sheet having moderate strength is excellent in processability and assembly property, and is easy to manufacture.

A method of applying an indolinone gel material to an anthrone rubber sheet and integrally molding the same is described in Japanese Laid-Open Patent Publication No. Hei No. 2-196453. However, according to such a molding method, since the steps of forming the fluorenone rubber sheet and the step of applying the fluorenone gel material coating thereon are required, the manufacturing process is complicated and the production time is also long. Therefore, it will lead to the manufacture of anthrone gel sheet. The cost becomes a problem of high unit price.

Further, Japanese Laid-Open Patent Publication No. Hei 9-207275, the entire disclosure of which is incorporated herein by reference to the entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire all all all all all all all allally The oxane is applied in the form of a film, and the addition reaction-curable fluorenone composition is cured into a sheet on the substrate, and only the fluorenone rubber layer is formed on the surface, while the inner layer remains the fluorenone gel. State of the sheet forming method. However, the anthrone gel sheet formed according to this method has a surface which is in the form of an anthrone rubber and an inner layer which is gel-like, so that when the anthrone gel sheet is punched or cut into a predetermined shape, There is a problem that the gelatinous ketone is oozing out from the cut surface.

Further, Japanese Laid-Open Patent Publication No. 2000-26733 discloses a method in which, when an anthrone gel sheet is formed, a filler is added to a raw material to be dispensed, and a raw material is applied, followed by standing. A method of locally depositing a filler on a single-sided surface layer by utilizing the precipitation effect of the filler. However, according to this molding method, in order to precipitate the filler on the one-side surface, it takes a long time to stand, and thus the molding time is elongated, which causes a problem that the manufacturing cost becomes high.

In the case of the formation of an anthrone gel sheet, the surface is subjected to crosslinking by irradiation with an actinic line such as ultraviolet rays, and the surface layer is formed, for example, in Japanese Laid-Open Patent Publication No. 2005-161780. Hardening method. However, according to this molding method, since two steps such as a step of forming an anthrone gel sheet and a step of irradiating ultraviolet rays thereon are required, the manufacturing tends to be complicated and the manufacturing time is elongated. In addition, an irradiation device for irradiating ultraviolet rays is also required. Therefore, there will be the manufacture of an anthrone gel sheet. The cost becomes a problem of high unit price.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a rubber surface which can not only enhance the surface strength, but also can improve the mechanical strength of the entire product by a simple method and at a low cost, and maintain the gel specificity. The elastic force does not result in the production of a sheet of fluorenone gel sheet from which the cross-section of the product is obtained by punching or cutting.

The structural feature of the present invention is an addition reaction-curable fluorenone gel material containing an organic polysiloxane as a main component and an addition reaction-hardening fluorenone rubber material containing an organic polyoxy siloxane as a main component. The preparation was prepared to form a preparation raw material, and the preparation raw material was applied onto a sheet-like substrate by a coating device to form an anthrone gel sheet having a needle insertion degree of 20 to 200 as defined in JIS K2207. Further, it is preferable that the fluorenone gel material is set to be 0.1 to 99.9 parts by weight, the fluorenone rubber material is set in the range of 0.1 to 99.9 parts by weight, and the total of the two is 100 parts by weight, in particular, the fluorenone gel material is set to 50. ~99 parts by weight, the anthrone rubber material is preferably in the range of 1 to 50 parts by weight, more preferably 70 to 99 parts by weight of the anthrone rubber material, and 1 to 30 parts by weight of the anthrone rubber material. For better.

According to the present invention, by rubberizing the surface of the anthrone gel sheet, not only the surface strength can be enhanced, but also the mechanical strength of the product can be improved while maintaining the specific elastic force of the gel, so that when the anthrone gel sheet is applied When punching or cutting, the fluorenone gel does not ooze out from the cut surface. Further, according to the present invention, a thin-walled fluorene ketone gel sheet having a needle insertion degree of 20 to 200 as defined in JIS K2207 and maintaining the gel-specific elastic force can be formed at a low cost.

In the present invention, a catalyst may be further added to the raw material to be formulated. The catalyst system has a hardening promoting action, such as a platinum catalyst, a peroxide catalyst, a zinc catalyst, or the like. Thereby, the hardening speed of the anthrone gel sheet can be accelerated, and the manufacturing cost can be reduced.

In the present invention, a primer may be applied in advance to the coated surface of the substrate. Thereby, the anthrone gel sheet can be integrally formed on the substrate, and the strength can be ensured.

In the present invention, the coating surface of the substrate may be subjected to a plasma treatment in advance. Thereby, the anthrone gel sheet can be integrally formed on the substrate, and the strength can be ensured.

Further, in the present invention, the substrate may be a material which can easily peel off the fluorenone gel sheet. Such a substrate is, for example, a polyethylene terephthalate film (PET film) which has been subjected to release treatment in advance, a polypropylene film, or the like. The material used in the release treatment is mainly an anthrone-based release agent. Thereby, the fluorenone gel sheet is peeled off from the substrate to form a monomer.

Further, in the present invention, the protective sheet may be bonded to the side of the ketone material of the fluorenone gel sheet and wound up. Thereby, the treatment of the anthrone gel sheet can be facilitated.

Further, in the present invention, a filler may be further added to the raw material to be formulated. Examples of the filler include inorganic fillers such as aluminum hydroxide, iron oxide, calcium carbonate, ceramics, glass fibers, carbon fibers, and carbon materials; and organic alkoxydecane compounds, organochloromethane compounds, and organic fillers. An organic ruthenium compound such as a decane compound or a low molecular weight siloxane compound is subjected to a surface treatment or the like. In this case, the thermal conductivity, the electric resistance value, and the like of the anthrone gel sheet can be controlled by the addition of the filler. Further, in the present invention, when the filler is formulated in the raw material, the filler is locally present on the one-side surface by the precipitation effect of the filler, and not only the fluorenone but also the fluorenone can be ensured. The surface strength of the gel sheet, and a sheet having good product uniformity can be formed with a short forming time.

According to the present invention, an addition reaction-curable fluorenone gel material containing an organic polysiloxane as a main component and an addition reaction-curable fluorenone rubber material containing an organic polysiloxane as a main component are carried out at a predetermined ratio. The preparation and application of the raw material on the sheet substrate by the coating device can be easily and inexpensively formed to form a thin-plate ketone condensation which improves the strength of the overall sheet and maintains the gel's unique elastic force. film.

Hereinafter, embodiments of the present invention will be described. The raw material of the anthrone gel sheet is 0.1 to 99.9 parts by weight of an addition reaction-hardening anthrone gel material containing an organic polyoxane as a main component, and an addition reaction hardening with an organic polyoxane as a main component. The fluorenone rubber material is blended in an amount of 0.1 to 99.9 parts by weight, and is formed into 100 parts by weight, and a catalyst having a hardening promoting action is further added thereto as needed to form a compounding raw material.

As the substrate, a flexible sheet material such as a polyethylene terephthalate film, a polypropylene film, paper, or cloth is used, and usually, a roll is used in a roll shape. The substrate is coated with a primer by a coating device. The primer is an anthrone-based adhesive. On the base material to which the primer was applied, the above-mentioned compounding raw material which was blended into an anthrone gel material, an anthrone rubber material, and a catalyst was continuously applied by a coating device. The thickness of the product is preferably set to 1 to 5000 μm in practical use. Further, as the coating device, a batch roll coater, a reverse coater, a knife coater, an air knife coater, a bar coater, a slit coater, or the like can be used. In addition, instead of applying primer coating on the substrate, it can be changed to The substrate is preliminarily subjected to a plasma treatment, whereby the anthrone gel sheet can also be integrally formed on the substrate.

After coating with a coating material on a substrate by a coating device, it is cured by heating at 100 to 300 ° C for about 5 minutes to form an anthrone gel sheet. The heating temperature range is preferably 120 to 250 ° C. However, although the hardening time is elongated, it can be hardened even if the raw material is not heated but is naturally placed. By adhering the protective sheet to the surface of the fluorenone sheet on the side of the fluorenone gel sheet thus formed, the fluorenone gel sheet can be protected, and the handling tends to be simple. The material of the protective sheet is a base material, and examples thereof include a flexible sheet material such as a polyethylene terephthalate film, a polypropylene film, a paper, and a cloth.

As described above, in the present embodiment, an addition reaction-curable fluorenone gel material containing an organic polysiloxane as a main component and an addition reaction-curable fluorenone rubber material containing an organic polysiloxane as a main component And the catalyst is blended in a predetermined ratio, and applied to the sheet substrate by a coating device, and further heating can be used to form a needle insertion degree of 20% as stipulated in JIS K2207 at a low cost in a simple and short time. 200 sheets of ketone ketone gel tablets. As a result, in the present embodiment, only the surface of the fluorenone gel sheet is rubberized, not only the surface strength can be enhanced, but also the mechanical strength of the entire sheet can be improved, while retaining the gel-specific elastic force, and the punching is not performed. The cross-section of the product is obtained by cutting and processing, and the fluorenone gel is oozing out. Further, since the filler is not added to the raw material, the molding time is short, and a sheet having good product uniformity can be formed. Further, the manufacturing method of the present embodiment does not require a special device such as ultraviolet irradiation, and the manufacturing steps can be easily configured. It can make manufacturing costs cheaper.

Further, in the present embodiment, the preparation raw material is bonded to the substrate to form the indolinone gel sheet integrally, but the invention is not limited thereto, and the anthrone gel sheet may be peeled off from the substrate to form a monomer. For example, when the front and back sides of the watch are not in a tracking shape at the peripheral portion to be used, the anthrone gel sheet is used in a monomer form. In this case, the substrate is formed by using a substrate such as a polyethylene terephthalate film or a polypropylene film which has been subjected to release treatment in advance, or a fluororesin film or a fluorine-processed paper to form an anthrone gel. sheet.

Further, in the present embodiment, the filler is not contained in the raw material, but an inorganic filler such as aluminum hydroxide, iron oxide, calcium carbonate, ceramics, glass fiber, carbon fiber or carbon material may be added as needed; These fillers are subjected to surface treatment using an organic sulfonium compound such as an organoalkoxysilane compound, an organochlorosilane compound, an organic sulfonium compound or a low molecular weight siloxane compound. In this case, by adding the filler, it is possible to control the thermal conductivity, the electric resistance value, and the like of the fluorene ketone gel sheet. In addition, when the filler is formulated into a filler, the filler is locally present on the surface of the one side by the precipitation effect of the filler, thereby ensuring the surface strength of the fluorene ketone gel sheet and forming it according to a shorter forming time. A sheet with good product uniformity.

Further, in the present embodiment, the catalyst is contained in the raw material to be blended, but may be omitted as necessary. In addition, instead of the catalyst, a filler may be added to the raw material.

Further, in the present embodiment, a protective sheet is bonded to the surface of the fluorenone gel sheet on the side of the oxime ketone material to protect the fluorenone gel sheet, but it may be omitted as needed. slightly.

Next, an embodiment will be described.

Fig. 1 is a schematic view showing a step of forming a film of an anthrone gel on a polyethylene terephthalate film (substrate). The fluorenone gel material was prepared by using 94 parts by weight of CY52-276 (manufactured by TORAY.Dow Corning Co., Ltd.), 6 parts by weight of NR6200 (manufactured by Wacker Asahikasei Silicone Co., Ltd.), and 0.5 part by weight of platinum catalyst. Mix and adjust to blend the ingredients. This preparation raw material 11 is supplied to the coating device 12. A polyethylene terephthalate film 14 (thickness 50 μm) which is continuously supplied and wound with a primer coating on a reel 13 is supplied to the coating device 12 to form a film on the surface of the film 14. The entire thickness of the coating preparation raw material 11 was 300 μm. The film 14 coated with the raw material 11 was cured by passing through the drying furnace 15 at 150 ° C for 5 minutes. Thereby, an anthrone gel sheet 16 which is integrated with the polyethylene terephthalate film on one side and has a surface strength and a gel-specific cushioning property can be obtained. Further, the film 19 was continuously wound up on the roll 19 in a state 18 in which the protective film 17 of the protective sheet was attached to the side of the ketone ketone sheet.

Next, the results of measuring the tensile strength and the needle insertion degree of the anthrone gel sheet of the present invention will be described. In addition to the test articles of the above examples, the testosterone gel material (CY52-276 manufactured by TORAY. Dow Corning Co., Ltd.) was set to 98, 90, 70, 50 as shown in Table 1 below. In parts and parts, the oxime rubber material (LR7665 manufactured by Wacker Asahikasei Silicone Co., Ltd.) was used as 5, 10, 30, and 50 parts by weight of the test pieces 1 to 5, and the like. Further, the reference products 1 and 2 were prepared in two types of CY52-276 of 100, 0 parts by weight and LR7665 of 0 and 100 parts by weight, respectively. Tensile strength measurement The shape of the test piece is based on JIS K6251 dumbbell No. 3, and the shape of the test piece for needle insertion measurement is 50. ×30mm.

The test method of the tensile strength is in accordance with JIS K6251, and the test method of the needle insertion degree is carried out in accordance with the method of JIS K2207. The test results are shown in Table 1 below.

As shown in Table 1, it was found that the needle insertion degree of the test article 1 to 5 is JIS K2207 is 20 to 200, and the proper elasticity unique to the gel is maintained, and the appropriate mechanical strength of the tensile strength of 0.0030 to 0.60 MPa is obtained. . In contrast, only the reference product 1 of the fluorenone gel material obtained a lower tensile strength than the test article, and only the reference product 2 of the fluorenone rubber material was obtained under the test article. The result of low needle insertion and lack of elasticity.

(industrial availability)

The present invention is based on an addition reaction hardening type fluorenone gel material containing an organic polysiloxane as a main component and an addition reaction hardening type fluorenone rubber material containing an organic polysiloxane as a main component, according to a predetermined ratio It is formulated and applied to the sheet substrate by a coating device, and is hardened to facilitate the simple and A thin-plate ketone ketone gel sheet which is improved in mechanical strength of the entire sheet and which maintains the gel-specific elastic force is formed at a low price.

11‧‧‧Materials

12‧‧‧ Coating device

13‧‧‧ reel

14‧‧‧Polyethylene terephthalate film

15‧‧‧ drying oven

16‧‧‧矽 ketone gel tablets

17‧‧‧Protective film

18‧‧‧The state of the protective film attached to the protective sheet

19‧‧ ‧ reel

Fig. 1 is a schematic explanatory view showing a manufacturing step of an anthrone gel sheet according to an embodiment of the present invention.

11‧‧‧Materials

12‧‧‧ Coating device

13‧‧‧ reel

14‧‧‧Polyethylene terephthalate film

15‧‧‧ drying oven

16‧‧‧矽 ketone gel tablets

17‧‧‧Protective film

18‧‧‧The state of the protective film attached to the protective sheet

19‧‧ ‧ reel

Claims (18)

A method for producing an anthrone gel sheet, characterized in that an addition reaction-hardening anthrone gel material containing an organic polysiloxane as a main component is hardened by an addition reaction using an organic polysiloxane as a main component The fluorenone rubber material is blended to form a preparation raw material, and the preparation raw material is applied onto the sheet substrate by a coating device to form an anthrone gel sheet having a needle insertion degree of 20 to 200 as defined in JIS K2207; A protective sheet was attached to the side of the ketone material of the fluorenone gel sheet, and coiling was performed. A method for producing an anthrone gel sheet according to the first aspect of the invention, wherein a catalyst is further added to the compounding material. A method for producing an anthrone gel sheet, characterized in that an addition reaction-hardening anthrone gel material containing an organic polysiloxane as a main component is hardened by an addition reaction using an organic polysiloxane as a main component The fluorenone rubber material is blended to form a blending raw material, and the coated surface of the sheet substrate is preliminarily coated with a primer, and the blending raw material is applied onto the substrate by a coating device to form a JIS K2207. An anthrone gel sheet with a needle insertion degree of 20 to 200. A method for producing an anthrone gel sheet according to item 3 of the patent application, wherein a catalyst is further added to the above-mentioned compound material. A method for producing an anthrone gel sheet according to the third or fourth aspect of the invention, wherein a protective sheet is bonded to the side of the oxime ketone material of the fluorenone gel sheet and is wound up. A method for producing an anthrone gel sheet, characterized in that an addition reaction hardening type fluorenone gel material containing organopolysiloxane as a main component The addition reaction hardening type fluorenone rubber material containing the organic polysiloxane as a main component is blended to form a preparation raw material, and the coated surface of the sheet substrate is subjected to a plasma treatment in advance, and the preparation material is coated by a coating device. An anthrone gel sheet having a needle insertion degree of 20 to 200 as defined in JIS K2207 was formed by coating on the above substrate. A method for producing an anthrone gel sheet according to item 6 of the patent application, wherein a catalyst is further added to the above-mentioned compound material. A method for producing an anthrone gel sheet according to the sixth or seventh aspect of the invention, wherein a protective sheet is bonded to the side of the oxime ketone material of the fluorenone gel sheet and is wound up. A method for producing an anthrone gel sheet, characterized in that an addition reaction-hardening anthrone gel material containing an organic polysiloxane as a main component is hardened by an addition reaction using an organic polysiloxane as a main component The fluorenone rubber material is blended to form a preparation raw material, and the preparation raw material is applied onto the sheet substrate by a coating device to form an anthrone gel sheet having a needle insertion degree of 20 to 200 as defined in JIS K2207; A protective sheet is bonded to the ketone material side of the fluorenone gel sheet and wound up. The base material is a material which can easily peel off the fluorenone gel sheet. The method for producing an anthrone gel sheet according to claim 9, wherein a catalyst is further added to the above-mentioned compound. A method for producing an anthrone gel sheet, characterized in that an addition reaction-hardening anthrone gel material containing an organic polysiloxane as a main component is hardened by an addition reaction using an organic polysiloxane as a main component The type of fluorenone rubber material is blended to form a blending raw material, and one of the above blending materials is further The filler is added in a step, and the preparation raw material is applied onto the sheet substrate by a coating device to form an anthrone gel sheet having a needle insertion degree of 20 to 200 as defined in JIS K2207; The protective sheet is attached to the side of the ketone material and is taken up. The method for producing an anthrone gel sheet according to claim 11, wherein the coated surface of the substrate is preliminarily coated with a primer. The method for producing an anthrone gel sheet according to claim 11, wherein the coated surface of the substrate is subjected to a plasma treatment in advance. The method for producing an anthrone gel sheet according to the eleventh aspect of the invention, wherein the substrate is a material which can easily peel off the anthrone gel sheet. A method for producing an anthrone gel sheet, characterized in that an addition reaction-hardening anthrone gel material containing an organic polysiloxane as a main component is hardened by an addition reaction using an organic polysiloxane as a main component The fluorenone rubber material is blended to form a blending raw material, and a filler and a catalyst are further added to the blending raw material, and the blending raw material is applied onto the sheet substrate by a coating device to form a needle prescribed in JIS K2207. An anthrone gel sheet having an insertion degree of 20 to 200; a protective sheet is attached to the side of the ketone material of the anthrone gel sheet, and coiling is performed. The method for producing an anthrone gel sheet according to the fifteenth aspect of the invention, wherein the coated surface of the substrate is preliminarily coated with a primer. The method for producing an anthrone gel sheet according to claim 15, wherein the coated surface of the substrate is subjected to a plasma treatment in advance. For example, the manufacturer of the oxime ketone gel sheet of claim 15 In the above method, the substrate is a material which can easily peel off the above fluorenone gel sheet.