JP2010242012A - Thin film crosslinking rubber sheet, composite thin film crosslinking rubber sheet, and manufacturing methods therefor - Google Patents

Thin film crosslinking rubber sheet, composite thin film crosslinking rubber sheet, and manufacturing methods therefor Download PDF

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Publication number
JP2010242012A
JP2010242012A JP2009094491A JP2009094491A JP2010242012A JP 2010242012 A JP2010242012 A JP 2010242012A JP 2009094491 A JP2009094491 A JP 2009094491A JP 2009094491 A JP2009094491 A JP 2009094491A JP 2010242012 A JP2010242012 A JP 2010242012A
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thin film
rubber sheet
cross
linked
uncrosslinked
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JP5189024B2 (en
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Masaaki Kawarada
正明 川原田
Teruyuki Iwatani
晃之 岩谷
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Maxell Kureha Co Ltd
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Kureha Elastomer Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
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    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
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    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4324—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making closed loops, e.g. belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73753—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being partially cured, i.e. partially cross-linked, partially vulcanized
    • B29C66/73754—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being partially cured, i.e. partially cross-linked, partially vulcanized the to-be-joined areas of both parts to be joined being partially cured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B29C66/73941—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset characterised by the materials of both parts being thermosets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0844—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using X-ray
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
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    • B29C2035/085—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using gamma-ray
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73751—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • B29C66/73752—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized the to-be-joined areas of both parts to be joined being uncured

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin film crosslinking rubber sheet in which even if it is a thin film rubber sheet, the mechanical strength of a joint is maintained, and the level difference of the joint can be eliminated, and to provide a composite thin film crosslinking rubber sheet which is obtained by joining these thin film crosslinking rubber sheets, and these manufacturing methods. <P>SOLUTION: In the thin film crosslinking rubber sheet 1, an end 1a is an uncrosslinked portion which can be plastically deformed, the remainder 1b is a crosslinked portion which has been crosslinked by radiation, and the end can be crosslinked and bonded. Using these thin film crosslinked rubber sheets, uncrosslinked portions of the ends are stacked and pressure molded, and thereafter crosslinked to integrate them. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、薄膜架橋ゴムシートおよび複合薄膜架橋ゴムシート並びにこれらの製造方法に関する。   The present invention relates to a thin film crosslinked rubber sheet, a composite thin film crosslinked rubber sheet, and a method for producing them.

加硫したゴムシートの端部をカット・研磨して接着剤を塗布した後、薄く分出しした未加硫シート（パッチシート）を挟んで加硫ゴムシートの端部同士を接合して熱盤を超える大きさのゴムシートを製造する方法が知られている（特許文献１）。
しかしながら、加硫ゴムシートの端部同士を挟んで接合する方法では、接合部の一部拡大図である図４に示すように、接合部８がもり上がって段差になったり、変形したりする。もり上がらないように成型すると強度が確保できない等の製品品質の課題が生じる。
特に膜厚さが１ｍｍ以下の薄膜ゴムシートの場合、工数の多い接着剤を用いて接合する方法では、接合部の段差を解消することが困難で、また機械的強度が低下するという問題がある。 After cutting and polishing the edges of the vulcanized rubber sheet and applying an adhesive, the edges of the vulcanized rubber sheet are joined together with the uncured uncured sheet (patch sheet) sandwiched between them. A method for producing a rubber sheet having a size exceeding 1 is known (Patent Document 1).
However, in the method of joining by sandwiching the end portions of the vulcanized rubber sheet, as shown in FIG. 4 which is a partially enlarged view of the joining portion, the joining portion 8 rises to form a step or deform. . If it is molded so that it does not rise, there will be product quality issues such as inability to ensure strength.
In particular, in the case of a thin film rubber sheet having a thickness of 1 mm or less, there is a problem in that it is difficult to eliminate the level difference at the joint portion and the mechanical strength is lowered by the method of joining using an adhesive with many man-hours. .

特開平１０−４６７５８号公報Japanese Patent Laid-Open No. 10-46758

この発明は、薄膜ゴムシートであっても、接合部の機械的強度を維持して、接合部の段差を解消することができる薄膜架橋ゴムシートおよびこの薄膜架橋ゴムシート同士を接合して得られる複合薄膜架橋ゴムシート、並びにこれらの製造方法の提供を目的とする。   The present invention can be obtained by bonding a thin film crosslinked rubber sheet and a thin film crosslinked rubber sheet that can eliminate the level difference of the bonded part while maintaining the mechanical strength of the bonded part even if it is a thin film rubber sheet. An object of the present invention is to provide a composite thin film crosslinked rubber sheet and a method for producing these.

薄膜架橋ゴムシートの接合について検討したところ、端部に未架橋部分を残すゴムシートを用いることにより、接合部の段差の発生を抑えて、長さおよび幅方向に接合強度を維持して複数枚接合できる複合薄膜架橋ゴムシートが得られることを見出した。本発明はこのような知見に基づきなされたものである。
本発明において薄膜架橋ゴムシートとは、ゴムシートの厚さが３．０ｍｍ以下、好ましくは１．０ｍｍ以下、より好ましくは０．４ｍｍ以下、０．０３ｍｍ以上の薄膜ゴムシートをいう。 We examined the bonding of thin-film crosslinked rubber sheets. By using a rubber sheet that leaves uncrosslinked portions at the edges, it is possible to suppress the occurrence of steps in the bonded portions and maintain the bonding strength in the length and width directions. It has been found that a composite thin film crosslinked rubber sheet that can be joined is obtained. The present invention has been made based on such findings.
In the present invention, the thin film crosslinked rubber sheet refers to a thin film rubber sheet having a rubber sheet thickness of 3.0 mm or less, preferably 1.0 mm or less, more preferably 0.4 mm or less and 0.03 mm or more.

すなわち、本発明は、端部を架橋接合できる薄膜架橋ゴムシートであって、上記端部が塑性変形できる未架橋部分であり、残部が放射線照射により架橋された架橋部分であることを特徴とする。
また、本発明の複合薄膜架橋ゴムシートは、複数枚の上記薄膜架橋ゴムシートの少なくとも端部同士を接合させてなり、その薄膜架橋ゴムシートの端部の未架橋帯部分同士を重ねて加圧成形後放射線照射により架橋して一体化させてなることを特徴とする。
また、本発明の他の複合薄膜架橋ゴムシートは、上記薄膜架橋ゴムシートの端部同士を接合させて、スリーブ状または無端ベルト状にした複合薄膜架橋ゴムシートであって、対向する両端部が未架橋部分である薄膜架橋ゴムシートの端部の未架橋帯部分同士を重ねて加圧成形後放射線照射により架橋して一体化させてなることを特徴とする。
上記複合薄膜架橋ゴムシートは、加圧成形後架橋して一体化させた接合部のシート厚さが上記残部の厚さと略同一であることを特徴とする。 That is, the present invention is a thin film cross-linked rubber sheet in which end portions can be cross-linked, wherein the end portions are uncrosslinked portions that can be plastically deformed, and the remaining portion is a cross-linked portion cross-linked by radiation irradiation. .
In addition, the composite thin film crosslinked rubber sheet of the present invention is formed by joining at least the ends of a plurality of the thin film crosslinked rubber sheets, and pressing the uncrosslinked band portions at the ends of the thin film crosslinked rubber sheet. It is characterized by being integrated by cross-linking by irradiation after forming.
Another composite thin film cross-linked rubber sheet of the present invention is a composite thin film cross-linked rubber sheet in which the ends of the above thin film cross-linked rubber sheet are joined to form a sleeve or endless belt, and the opposite end portions are opposite to each other. It is characterized in that the uncrosslinked band portions at the end portions of the thin film crosslinked rubber sheet which is an uncrosslinked portion are overlapped with each other and are integrated by crosslinking after irradiation by radiation.
The composite thin film cross-linked rubber sheet is characterized in that the sheet thickness of the joint portion obtained by cross-linking after press molding and integration is substantially the same as the thickness of the remaining portion.

本発明の薄膜架橋ゴムシートの製造方法は、未架橋の薄膜ゴムシートを製造する工程と、上記薄膜ゴムシートの端部を放射線遮蔽層で覆う工程と、上記放射線遮蔽層で覆われない残部を放射線照射により架橋する工程とを備えることを特徴とする。
また、本発明の複合薄膜架橋ゴムシートの製造方法は、上記薄膜架橋ゴムシートの端部の未架橋帯部分同士を重ねて加圧成形する工程と、
加圧成形後に放射線照射により架橋する工程とを備えることを特徴とする。 The method for producing a thin film crosslinked rubber sheet of the present invention comprises a step of producing an uncrosslinked thin film rubber sheet, a step of covering an end of the thin film rubber sheet with a radiation shielding layer, and a remaining portion not covered with the radiation shielding layer. And a step of crosslinking by radiation irradiation.
Moreover, the method for producing a composite thin film crosslinked rubber sheet of the present invention includes a step of pressure-molding the uncrosslinked band portions at the ends of the thin film crosslinked rubber sheet,
And a step of crosslinking by radiation irradiation after the pressure molding.

本発明の薄膜架橋ゴムシートを複数枚、上記方法により、長さおよび幅方向に接合することにより、接合部は平坦で接合強度に優れる。また、その製造方法は、放射線照射により架橋するのみであるので、大幅な工数削減が可能となる。   By joining a plurality of the thin-film crosslinked rubber sheets of the present invention in the length and width directions by the above method, the joining portion is flat and excellent in joining strength. Moreover, since the manufacturing method only crosslinks by irradiation with radiation, the number of man-hours can be greatly reduced.

薄膜架橋ゴムシートの製造工程を示す図である。It is a figure which shows the manufacturing process of a thin film crosslinked rubber sheet. 複合薄膜架橋ゴムシートの製造工程を示す図であるIt is a figure which shows the manufacturing process of a composite thin film crosslinked rubber sheet. 複合薄膜架橋ゴムシートの他の形状を示す図である。It is a figure which shows the other shape of a composite thin film crosslinked rubber sheet. 従来例の接合部の一部拡大図であるIt is a partial enlarged view of the junction part of a prior art example.

本発明に使用できるゴムは、放射線により架橋できるゴムであれば使用できる。例えば、ブタジエンゴム、スチレン−ブタジエンゴム、アクリロニトリル−ブタジエンゴム、エチレン−プロピレンゴム、エチレン−プロピレン−非共役ジエンゴム、アクリルゴム、シリコーンゴムなどが例示される。これらの中で、粘度が低く、押圧加工時に厚みが均一に加工しやすいシリコーンゴムが好ましい。ゴムは単独または混合ゴムとして使用できる。   The rubber that can be used in the present invention can be any rubber that can be crosslinked by radiation. Examples thereof include butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, ethylene-propylene-nonconjugated diene rubber, acrylic rubber, and silicone rubber. Among these, silicone rubber is preferable because it has a low viscosity and can be easily processed to have a uniform thickness during pressing. The rubber can be used alone or as a mixed rubber.

なお、上記ゴムには、有機過酸化物等のラジカル架橋開始剤を含むことが可能であり、開始剤としては、例えば、ベンゾイルパーオキサイド、ラウロイルパーオキサイド、モノクロルベンゾイルパーオキサイド、２，４ジクロルベンゾイルパーオキサイド、ｔ−ブチルクミルパーオキサイド、２，５−ジメチル−２，５ビス（ｔ−ブチルパーオキシ）ヘキサン、１，１−ジ−ｔ−ブチルパーオキシ−３，３，５−トリメチルシクロヘキサン、１，１−ビス−ｔ−ブチルパーオキシ−３，３，５−トリメチルシクロヘキサン、ジ−ｔ−ブチルパーオキサイド、ｔ−ブチルクミルパーオキサイド等が例示できる。   The rubber may contain a radical crosslinking initiator such as an organic peroxide. Examples of the initiator include benzoyl peroxide, lauroyl peroxide, monochlorobenzoyl peroxide, and 2,4 dichloro. Benzoyl peroxide, t-butylcumyl peroxide, 2,5-dimethyl-2,5-bis (t-butylperoxy) hexane, 1,1-di-t-butylperoxy-3,3,5-trimethylcyclohexane 1,1-bis-t-butylperoxy-3,3,5-trimethylcyclohexane, di-t-butyl peroxide, t-butylcumyl peroxide and the like.

本発明で使用できるゴムには、例えば、電子線架橋における接着力の改善に寄与する共架橋剤、およびゴム加工特性やその物性を改善する老化防止剤、補強剤または充填剤、加工助剤または滑剤、着色剤等のゴム配合剤を配合することができる。
共架橋剤としては多価アルコールのアクリル酸エステルやメタクリル酸エステル、多価カルボン酸のアリルエステル、トリアリルイソシアヌレート、トリアリルシアヌレート、トリメチロールプロパントリアリレート等が挙げられる。
また、老化防止剤としては酸化防止剤や紫外線吸収剤が、補強剤または充填剤としてはカーボンブラック、無水ケイ酸、ケイ酸カルシウム、ケイ酸アルミニウム、クレー、炭酸カルシウム、タルク、硫酸バリウム、硫酸アルミナ、リトポン、スチレン樹脂、フェノール樹脂、石油樹脂、再生ゴムなどが、加工助剤または滑剤としてはステアリン酸、ステアリン酸金属石鹸、ワックス類がそれぞれ挙げられる。 The rubber that can be used in the present invention includes, for example, a co-crosslinking agent that contributes to the improvement of adhesive strength in electron beam crosslinking, and an anti-aging agent, reinforcing agent or filler, a processing aid, or a rubber that improves rubber processing characteristics and physical properties. Rubber compounding agents such as lubricants and colorants can be blended.
Examples of the co-crosslinking agent include polyhydric alcohol acrylic acid ester and methacrylic acid ester, polyhydric carboxylic acid allyl ester, triallyl isocyanurate, triallyl cyanurate, and trimethylolpropane triarylate.
Antioxidants and UV absorbers are used as anti-aging agents, and carbon black, anhydrous silicic acid, calcium silicate, aluminum silicate, clay, calcium carbonate, talc, barium sulfate, and alumina sulfate are used as reinforcing agents and fillers. Lithopone, styrene resin, phenol resin, petroleum resin, recycled rubber and the like, and processing aids and lubricants include stearic acid, metal stearate soap, and waxes, respectively.

本発明の薄膜架橋ゴムシートは、上記ゴム材料をシート状に加工して、そのゴムシートの端部を塑性変形できる未架橋部分として、残部を放射線照射により架橋された架橋部分とすることで得られる。
薄膜架橋ゴムシートの製造方法について、図１を参照して説明する。図１（ａ）〜（ｄ）は、薄膜架橋ゴムシートの製造工程を示す図である。なお、図１、図２において、ゴムシートの大きさおよび厚さについては、接合部の説明のため、部分的に変更拡大してある。また、斜線部分は架橋している部分を表す。
ゴム材料、例えばシリコーンゴム生地をシート厚さ１．０ｍｍ以下のシート状に形成し、未架橋ゴムシート１’を製造する。（図１（ａ））。
ゴムシートの製造は、シート厚さを１．０ｍｍ以下とする方法であれば、採用できる。例えばカレンダーロールによる方法、塗工による方法等が挙げられる。ゴムシートの厚さが０．４ｍｍをこえる場合、好ましいゴムシート製造方法はカレンダーロールによる方法である。
また、未架橋ゴムシートを製造する場合には、取り扱い性を向上させるために、ポリエチレンテレフタレート製などのフィルムを貼り付けて基材フィルムを設けることが好ましい。また、製品を巻取る場合には、巻き出し時に取り扱い易くするために、ゴムシートの非基材フィルム面に、ポリエチレンやポリプロピレンなどがラミネートされた離型性を有する工程紙やポリエチレンテレフタレート製などのフィルムを貼り合せることができる。 The thin film cross-linked rubber sheet of the present invention is obtained by processing the rubber material into a sheet shape, and forming the end portion of the rubber sheet as an uncrosslinked portion that can be plastically deformed, and the rest as a cross-linked portion cross-linked by radiation irradiation. It is done.
The manufacturing method of a thin film crosslinked rubber sheet is demonstrated with reference to FIG. FIGS. 1A to 1D are diagrams showing a manufacturing process of a thin film crosslinked rubber sheet. In FIG. 1 and FIG. 2, the size and thickness of the rubber sheet are partially changed and enlarged for explanation of the joint. The hatched portion represents a cross-linked portion.
A rubber material, for example, a silicone rubber fabric is formed into a sheet shape having a sheet thickness of 1.0 mm or less to produce an uncrosslinked rubber sheet 1 ′. (FIG. 1 (a)).
The rubber sheet can be manufactured as long as the sheet thickness is 1.0 mm or less. Examples thereof include a method using a calendar roll and a method using coating. When the thickness of the rubber sheet exceeds 0.4 mm, a preferable rubber sheet manufacturing method is a method using a calender roll.
Moreover, when manufacturing an uncrosslinked rubber sheet, it is preferable to provide a base film by attaching a film made of polyethylene terephthalate or the like in order to improve the handleability. In addition, when winding the product, in order to facilitate handling at the time of unwinding, a process paper having a releasability in which polyethylene or polypropylene is laminated on the non-base film surface of the rubber sheet, or made of polyethylene terephthalate, etc. A film can be attached.

得られたゴムシート１’の端部に放射線遮蔽層２を形成する（図１（ｂ））。
放射線遮蔽層２は、放射線を透過し難い部材で構成される。例えば、層厚さの厚いゴムシート、樹脂板、金属板等が挙げられる。本発明においては、薄膜ゴムシートと密着できる層厚さの厚いゴムシートが好ましい。放射線遮蔽層の厚さは取扱性に優れていることから１ｍｍをこえる厚さが好ましい。
また、放射線遮蔽層２の層厚さを薄膜ゴムシートの端部から中心部に向かって徐々に薄くすることにより、薄膜架橋ゴムシートの端部の架橋密度に傾斜をつけることができる。 A radiation shielding layer 2 is formed at the end of the obtained rubber sheet 1 ′ (FIG. 1B).
The radiation shielding layer 2 is composed of a member that is difficult to transmit radiation. For example, a thick rubber sheet, a resin plate, a metal plate, etc. are mentioned. In the present invention, a thick rubber sheet that can be in close contact with the thin film rubber sheet is preferred. The thickness of the radiation shielding layer is preferably greater than 1 mm because of excellent handleability.
Further, by gradually reducing the thickness of the radiation shielding layer 2 from the end portion of the thin film rubber sheet toward the center portion, the crosslink density at the end portion of the thin film crosslinked rubber sheet can be inclined.

端部に放射線遮蔽層２を形成した後、放射線３の照射を行なう（図１（ｃ））。
放射線架橋は、電子線、γ線、Ｘ線等が挙げられる。本発明においては放射線遮蔽層の効果を制御しやすいという観点で電子線照射が好ましい。
電子線照射条件としては、加速電圧が５０〜３０００ＫＶ、好ましくは１００〜８００ＫＶ、照射線量が１０ｋＧｙ〜４００ｋＧｙ、好ましくは５０〜２００ｋＧｙである。照射条件として加速電圧が５０ＫＶ未満では厚さ方向への電子線到達深度が低くなり未架橋部分が残ってしまい、照射線量が１０ｋＧｙ未満では架橋が十分でなく、アンダー架橋になる。また、加速電圧が３０００ＫＶをこえると設備費用が非常に高価となると共に放射線遮蔽層の効果が希薄となる。照射線量が８００ｋＧｙをこえると過架橋になると共に電子線照射による発熱が大きくなるため好ましくない。 After the radiation shielding layer 2 is formed at the end, the radiation 3 is irradiated (FIG. 1C).
Examples of radiation crosslinking include electron beam, γ-ray, and X-ray. In the present invention, electron beam irradiation is preferred from the viewpoint of easily controlling the effect of the radiation shielding layer.
As the electron beam irradiation conditions, the acceleration voltage is 50 to 3000 KV, preferably 100 to 800 KV, and the irradiation dose is 10 kGy to 400 kGy, preferably 50 to 200 kGy. If the acceleration voltage is less than 50 KV as the irradiation condition, the electron beam arrival depth in the thickness direction becomes low and an uncrosslinked portion remains, and if the irradiation dose is less than 10 kGy, crosslinking is not sufficient and undercrosslinking occurs. Further, if the acceleration voltage exceeds 3000 KV, the equipment cost becomes very expensive and the effect of the radiation shielding layer becomes dilute. When the irradiation dose exceeds 800 kGy, it is not preferable because it causes overcrosslinking and heat generation due to electron beam irradiation increases.

電子線照射はシートの片面からの照射であってもよく、また、電子線照射条件を変更することにより、両面からの照射であってもよい。放射線遮蔽層の遮蔽効果や架橋する製品の厚さ、材質などを考慮し、電子線照射条件および電子線照射方向は適宜設定する。
また、電子線照射による発熱の影響が出る場合には、必要とされる照射条件に対し、分割して電子線照射を行ない、電子線照射による発熱の影響を緩和することが好ましい。
また、未架橋部分１ａが図１に示すように片面からのみ照射された場合、薄膜架橋ゴムシート１の電子線照射されていない面同士を接合する。一方、両面から照射された場合、薄膜架橋ゴムシート１の放射線遮蔽層の密着していた面同士を接合する。これにより、接着力とともに機械的強度に優れた複合薄膜架橋ゴムシートが得られる。 The electron beam irradiation may be irradiation from one side of the sheet, or may be irradiation from both sides by changing the electron beam irradiation conditions. Considering the shielding effect of the radiation shielding layer, the thickness and material of the product to be crosslinked, the electron beam irradiation conditions and the electron beam irradiation direction are appropriately set.
In addition, when the influence of heat generation by electron beam irradiation appears, it is preferable to divide the electron beam irradiation for the required irradiation conditions to reduce the influence of heat generation by electron beam irradiation.
Moreover, when the uncrosslinked part 1a is irradiated only from one side as shown in FIG. 1, the surfaces which are not irradiated with the electron beam of the thin film crosslinked rubber sheet 1 are joined. On the other hand, when it irradiates from both surfaces, the surface which the radiation shielding layer of the thin film bridge | crosslinking rubber sheet 1 closely_contact | adhered is joined. Thereby, the composite thin film crosslinked rubber sheet excellent in mechanical strength as well as adhesive strength can be obtained.

放射線遮蔽層２を取り外すことで塑性変形できる未架橋部分１ａを有し、残部１ｂが架橋されている薄膜架橋ゴムシート１が得られる（図１（ｄ））。
図１においては、薄膜架橋ゴムシート１の１つの端部を未架橋部分１ａとする例について説明したが、未架橋部分１ａは架橋ゴムシート１’の１ａに対向する他の端部に設けることができる。 A thin film crosslinked rubber sheet 1 having an uncrosslinked portion 1a that can be plastically deformed by removing the radiation shielding layer 2 and having the remaining portion 1b crosslinked is obtained (FIG. 1 (d)).
In FIG. 1, an example in which one end portion of the thin film crosslinked rubber sheet 1 is an uncrosslinked portion 1a has been described, but the uncrosslinked portion 1a is provided at the other end portion facing the 1a of the crosslinked rubber sheet 1 ′. Can do.

また、電子線照射の場合、放射線遮蔽層を使用せず、電子線照射装置の照射範囲から外すことで、塑性変形できる未架橋部分を作製することもできる。   Further, in the case of electron beam irradiation, an uncrosslinked portion that can be plastically deformed can be produced by removing from the irradiation range of the electron beam irradiation apparatus without using a radiation shielding layer.

本発明の複合薄膜架橋ゴムシートは、上記薄膜架橋ゴムシート１の未架橋部分１ａ同士を重ねて加圧してシート厚さを一定にする成形後、放射線照射により架橋して一体化させて得られる。
本発明の複合薄膜架橋ゴムシートの製造について図２を参照して説明する。図２（ａ）〜（ｅ）は、複合薄膜架橋ゴムシートの製造工程を示す図である。
端部に未架橋部分１ａを含み、残部１ｂが架橋されている薄膜架橋ゴムシート１を２枚準備する（図２（ａ））。 The composite thin film cross-linked rubber sheet of the present invention is obtained by forming the thin film cross-linked rubber sheet 1 with the uncrosslinked portions 1a being stacked and pressed to form a constant sheet thickness, and then cross-linking and integrating with radiation. .
The production of the composite thin film crosslinked rubber sheet of the present invention will be described with reference to FIG. 2 (a) to 2 (e) are diagrams showing a manufacturing process of the composite thin film crosslinked rubber sheet.
Two thin-film crosslinked rubber sheets 1 including an uncrosslinked portion 1a at the end and crosslinked in the remaining portion 1b are prepared (FIG. 2 (a)).

次に、薄膜架橋ゴムシート１の端部の未架橋帯１ａ同士を重ね合わせる（図２（ｂ））。
その後、塑性変形できる未架橋帯１ａ同士を重ね合わせ部分をプレスしてシートの厚さを残部１ｂ部分と略同一とする（図２（ｃ））。未架橋帯１ａ部分の塑性変形により、シートの厚さが残部１ｂ部分と略同一となる重ね合わせ部分４の帯幅長さは、未架橋帯１ａ部分の帯幅長さよりも長くなる場合がある。
また、未架橋帯１ａ同士を重ね合わせ方法としては、未架橋帯１ａの態様により、以下の方法が挙げられる。以下、未架橋帯１ａが両面未架橋の場合をＩシートと、未架橋帯１ａが片面未架橋の場合をＩＩシートとする。
（１）Ｉシート同士を重ね合わせる。
（２）ＩシートとＩＩシートの未架橋部分の片面とを重ね合わせる。
（３）ＩＩシートの未架橋部分の片面同士を重ね合わせる。 Next, the uncrosslinked bands 1a at the ends of the thin film crosslinked rubber sheet 1 are overlapped (FIG. 2 (b)).
Thereafter, the uncrosslinked bands 1a that can be plastically deformed are overlapped with each other, and the portion is pressed to make the thickness of the sheet substantially the same as the remaining portion 1b (FIG. 2C). Due to plastic deformation of the uncrosslinked band 1a portion, the band width length of the overlapping portion 4 where the thickness of the sheet is substantially the same as the remaining portion 1b portion may be longer than the band width length of the unbridged band 1a portion. .
Moreover, as a method of superimposing the uncrosslinked zones 1a, the following methods may be mentioned depending on the mode of the uncrosslinked zone 1a. Hereinafter, the case where the uncrosslinked zone 1a is double-sided uncrosslinked is referred to as an I sheet, and the case where the uncrosslinked zone 1a is single-sided uncrosslinked is referred to as an II sheet.
(1) Overlapping I sheets.
(2) The I sheet and the one side of the uncrosslinked portion of the II sheet are overlapped.
(3) One side of the uncrosslinked portion of the II sheet is overlapped.

重ね合わされプレスされた未架橋帯１ａ部分を電子線照射する（図２（ｄ））。電子線照射条件は、薄膜架橋ゴムシート１製造時の条件と同じであることが好ましい。上記重ね合わせの態様が（１）または（３）の場合、電子線照射は重ね合わせ部分の両面側から行なうのが好ましい。また、（２）の場合、Ｉシート側から行なうのが好ましい。   The uncrosslinked zone 1a portion that is superimposed and pressed is irradiated with an electron beam (FIG. 2 (d)). The electron beam irradiation conditions are preferably the same as the conditions for producing the thin film crosslinked rubber sheet 1. When the superposition mode is (1) or (3), the electron beam irradiation is preferably performed from both sides of the superposed portion. In the case of (2), it is preferable to carry out from the I sheet side.

電子線照射により、薄膜架橋ゴムシート１の端部同士が接合された複合薄膜架橋ゴムシート５が得られる。このシート５は、接合部が一体架橋されており、接合強度に優れた薄膜架橋ゴムシートとなる。また、接合部のシート厚さが上記残部の厚さと略同一となり、シート５として全体に略同一の厚みとなる。   The composite thin film crosslinked rubber sheet 5 in which the ends of the thin film crosslinked rubber sheet 1 are bonded to each other is obtained by electron beam irradiation. The sheet 5 is a thin-film crosslinked rubber sheet having a bonded portion integrally crosslinked and having excellent bonding strength. Further, the sheet thickness of the joint portion is substantially the same as the thickness of the remaining portion, and the sheet 5 as a whole has substantially the same thickness.

上記接合方法は、２枚の薄膜架橋ゴムシート１を結合しても、また、１枚の薄膜架橋ゴムシートの端部同士を接合させて、スリーブ状または無端ベルト状にすることもできる。図３（ａ）はスリーブの斜視図であり、図３（ｂ）は無端ベルトの斜視図である。
薄膜架橋ゴムシート１の対辺の両端部を重ね合わせてプレス後、電子線照射することにより、重ね合わされた面が一体に接合されたスリーブ状の複合薄膜架橋ゴムシート６を製造できる（図３（ａ））。
また、薄膜架橋ゴムシート１を複数用いて、それぞれの対辺の端部を重ね合わせてプレス後、電子線照射することにより、重ね合わされた面が一体に接合された無端ベルト状の複合薄膜架橋ゴムシート７を製造できる（図３（ｂ））。 In the joining method, two thin film crosslinked rubber sheets 1 may be joined, or the ends of one thin film crosslinked rubber sheet may be joined to form a sleeve or an endless belt. FIG. 3A is a perspective view of a sleeve, and FIG. 3B is a perspective view of an endless belt.
By overlapping and pressing both ends of the opposite side of the thin film cross-linked rubber sheet 1 and irradiating with an electron beam, a sleeve-like composite thin film cross-linked rubber sheet 6 in which the superposed surfaces are integrally joined can be manufactured (FIG. 3 ( a)).
Moreover, the endless belt-like composite thin film cross-linked rubber in which the overlapped surfaces are integrally bonded by using a plurality of thin film cross-linked rubber sheets 1 and overlapping and pressing the ends of the opposite sides and then irradiating with an electron beam. The sheet 7 can be manufactured (FIG. 3B).

本発明の複合薄膜架橋ゴムシートは、３ｍｍ以下のシート厚さに適用できるので、真空プレス用シート、ラミネータ用シート、保護シート、エアーバック、ベルト等の用途に好適に用いることができる。   Since the composite thin film crosslinked rubber sheet of the present invention can be applied to a sheet thickness of 3 mm or less, it can be suitably used for applications such as a vacuum press sheet, a laminator sheet, a protective sheet, an air bag, and a belt.

以下、実施例によって本発明を詳述する。なお、以下の記載で「部」は重量部を示す。実施例１
信越化学工業（株）製シリコーンゴムコンパウンド（商品名：ＫＥ９５１Ｕ）をロールで分出ししてポリエチレンテレフタレート製のマットフィルムに貼り付けて、さらにポリエチレンテレフタレート製のフィルムで挟んで、厚さ０．３ｍｍ×幅１５０ｍｍ×長さ１５０ｍｍの大きさに成形して裁断する。
得られたシリコーンゴムフィルムの端部幅２０ｍｍを覆うように、厚さ３ｍｍのＥＰＤＭゴムシートからなる放射線遮蔽層を端部両面に被せてマスクする。
端部がマスクされたシリコーンゴムフィルム全面に対して、加速電圧２００Ｖ、照射線量１００ｋＧｙで、ゴムフィルム両面に電子線照射を行なった後、放射線遮蔽層を取り外すことにより、端部が塑性変形できる未架橋部分を有する薄膜架橋ゴムシートを製造した。 Hereinafter, the present invention will be described in detail by way of examples. In the following description, “parts” indicates parts by weight. Example 1
Silicone rubber compound (trade name: KE951U) manufactured by Shin-Etsu Chemical Co., Ltd. is dispensed with a roll and attached to a matte film made of polyethylene terephthalate, and further sandwiched between films made of polyethylene terephthalate. It is formed into a size of 150 mm wide × 150 mm long and cut.
A masking is performed by covering a radiation shielding layer made of an EPDM rubber sheet having a thickness of 3 mm on both end portions so as to cover the end width of 20 mm of the obtained silicone rubber film.
After irradiating both sides of the rubber film with an electron beam at an accelerating voltage of 200 V and an irradiation dose of 100 kGy on the entire surface of the silicone rubber film whose end is masked, the end can be plastically deformed by removing the radiation shielding layer. A thin film crosslinked rubber sheet having a crosslinked portion was produced.

実施例２
信越化学工業（株）製シリコーンゴムコンパウンド（商品名：ＫＥ９５１Ｕ）をロールで分出ししてポリエチレンテレフタレート製のマットフィルムに貼り付けて、さらにポリエチレンテレフタレート製のフィルムにて挟んで、厚さ０．３ｍｍ×幅１５０ｍｍ×長さ１５０ｍｍの大きさに成形して裁断する。
得られたシリコーンゴムフィルムの両方の端部幅２０ｍｍをそれぞれ覆うように、厚さ３ｍｍのＥＰＤＭゴムシートからなる放射線遮蔽層を端部両面に被せてマスクする。
対向する両端部がマスクされたシリコーンゴムフィルム全面に対して、加速電圧２００Ｖ、照射線量１００ｋＧｙで、ゴムフィルム両面に電子線照射を行なった後、放射線遮蔽層を取り外すことにより、両端部が塑性変形できる未架橋部分を有する薄膜架橋ゴムシートを製造した。 Example 2
Silicone rubber compound (trade name: KE951U) manufactured by Shin-Etsu Chemical Co., Ltd. is dispensed with a roll and attached to a matte film made of polyethylene terephthalate, and further sandwiched between films made of polyethylene terephthalate. X shape of 150 mm width x 150 mm length and cut.
The resulting silicone rubber film is masked by covering both end portions with a radiation shielding layer made of an EPDM rubber sheet having a thickness of 3 mm so as to cover both end portion widths of 20 mm.
After irradiating both sides of the rubber film with an electron beam at an acceleration voltage of 200 V and an irradiation dose of 100 kGy, the opposite ends are plastically deformed by removing the radiation shielding layer. A thin film crosslinked rubber sheet having an uncrosslinked portion was produced.

実施例３
実施例１で得られた薄膜架橋ゴムシートを２枚を準備する。
この２枚の薄膜架橋ゴムシートの未架橋部分を重ね合わせて、ニップロールにて加圧成形する。
その後、加圧成形部分に対して、加速電圧２００Ｖ、照射線量１００ｋＧｙで、ゴムフィルム両面に電子線照射を行ない、複合薄膜架橋ゴムシートを製造した。
得られた複合薄膜架橋ゴムシートの接合部の外観、硬さ、引張り強さ、伸びを測定した。外観は目視により、硬さはＪＩＳＫ６２５３−１９９７（タイプＡデュロメーター）、引張り強さおよび伸びはＪＩＳＫ６２５１−２００４により測定した。結果を表１に示す。なお、表１において、実施例３コントロールは、実施例１で得られた薄膜架橋ゴムシートの架橋部分の特性であり、実施例３従来接合品は、実施例１で準備した薄膜架橋ゴムシート端部同士を重ね合わせて、熱盤に挟んでプレスに入れ、加硫温度１６４℃、加硫時間３０分、加硫圧力として面圧１ＭＰａの条件でプレス加硫することで得られた複合加硫ゴムシートの接合部の試験結果である。
なお、薄膜架橋ゴムシートの未架橋部分を重ね合わせて、シートの厚さを架橋部分と略同一となる条件でプレスした場合もニップロールにて加圧成形した場合と同一の複合加硫ゴムシートが得られた。 Example 3
Two sheets of the thin film crosslinked rubber sheet obtained in Example 1 are prepared.
The uncrosslinked portions of the two thin film crosslinked rubber sheets are overlapped and pressure-molded with a nip roll.
Thereafter, the pressure-molded portion was irradiated with an electron beam on both sides of the rubber film at an acceleration voltage of 200 V and an irradiation dose of 100 kGy to produce a composite thin film crosslinked rubber sheet.
The appearance, hardness, tensile strength, and elongation of the joint portion of the obtained composite thin film crosslinked rubber sheet were measured. The appearance was measured by visual observation, the hardness was measured by JISK6253-1997 (type A durometer), and the tensile strength and elongation were measured by JISK6251-2004. The results are shown in Table 1. In Table 1, Example 3 control is the characteristics of the crosslinked portion of the thin film crosslinked rubber sheet obtained in Example 1. Example 3 Conventionally bonded product is the end of the thin film crosslinked rubber sheet prepared in Example 1. Composite vulcanization obtained by stacking parts together, putting them in a press sandwiched between hot plates, press vulcanization under conditions of vulcanization temperature 164 ° C, vulcanization time 30 minutes, vulcanization pressure 1 MPa surface pressure It is a test result of the junction part of a rubber sheet.
The same composite vulcanized rubber sheet as in the case of press molding with a nip roll is also used when the uncrosslinked portion of the thin film crosslinked rubber sheet is overlapped and pressed under the condition that the thickness of the sheet is substantially the same as the crosslinked portion. Obtained.

実施例４
実施例２で得られた薄膜架橋ゴムシートを準備する。
この薄膜架橋ゴムシートの両端部の未架橋部分を重ね合わせて、シートの厚さを架橋部分と略同一となる条件でプレスする。
その後、プレスにより加圧成形した部分に対して、加速電圧２００Ｖ、照射線量１００ｋＧｙで、ゴムフィルム両面に電子線照射を行ない、スリーブ状の複合薄膜架橋ゴムシートを製造した。
接合部を実施例３と同一の方法で評価した。結果を表１に示す。 Example 4
The thin film crosslinked rubber sheet obtained in Example 2 is prepared.
The uncrosslinked portions at both ends of the thin film crosslinked rubber sheet are overlapped and pressed under the condition that the thickness of the sheet is substantially the same as the crosslinked portion.
Thereafter, the both surfaces of the rubber film were irradiated with an electron beam at an acceleration voltage of 200 V and an irradiation dose of 100 kGy on the portion formed by pressing with a press to produce a sleeve-shaped composite thin film crosslinked rubber sheet.
The joint was evaluated in the same manner as in Example 3. The results are shown in Table 1.

Figure 2010242012
Figure 2010242012

本願発明の複合薄膜架橋ゴムシートは、いずれも接合部外観が平坦であり、硬さ、引張り強さ、伸びで表したゴム特性が従来接合品よりも優れていた。   The composite thin film cross-linked rubber sheet of the present invention had a flat appearance at the bonded portion, and was superior in rubber properties expressed by hardness, tensile strength, and elongation to the conventional bonded product.

本発明の薄膜架橋ゴムシートは接合方法が簡易であり、また、長さおよび幅方向に接合することができるので、任意の大きさの複合薄膜架橋ゴムシートを得ることができる。
そのため、今後、真空プレス用シート、ラミネータ用シート、保護シート、エアーバック、ベルト等の分野で利用できる。 Since the thin film crosslinked rubber sheet of the present invention has a simple joining method and can be joined in the length and width directions, a composite thin film crosslinked rubber sheet of any size can be obtained.
Therefore, in the future, it can be used in fields such as a vacuum press sheet, a laminator sheet, a protective sheet, an air bag, and a belt.

１ 薄膜架橋ゴムシート
２ 放射線遮蔽層
３ 放射線
４ 重ね合わせ部分
５ 複合薄膜架橋ゴムシート
６ スリーブ状の複合薄膜架橋ゴムシート
７ 無端ベルト状の複合薄膜架橋ゴムシート
８ 接合部 DESCRIPTION OF SYMBOLS 1 Thin film crosslinked rubber sheet 2 Radiation shielding layer 3 Radiation 4 Superposition part 5 Composite thin film crosslinked rubber sheet 6 Sleeve-shaped composite thin film crosslinked rubber sheet 7 Endless belt-shaped composite thin film crosslinked rubber sheet 8 Joining part

Claims (6)

端部を架橋接合できる薄膜架橋ゴムシートであって、前記端部が塑性変形できる未架橋部分であり、残部が放射線照射により架橋された架橋部分であることを特徴とする薄膜架橋ゴムシート。   A thin-film cross-linked rubber sheet capable of cross-linking end portions, wherein the end portion is an uncross-linked portion capable of plastic deformation, and the remaining portion is a cross-linked portion cross-linked by radiation irradiation. 複数枚の薄膜架橋ゴムシートの少なくとも端部同士を接合させてなる複合薄膜架橋ゴムシートであって、
前記薄膜架橋ゴムシートが請求項１記載の薄膜架橋ゴムシートであり、該薄膜架橋ゴムシートの端部の未架橋部分同士を重ねて加圧成形後放射線照射により架橋して一体化させてなることを特徴とする複合薄膜架橋ゴムシート。 A composite thin film crosslinked rubber sheet formed by joining at least the ends of a plurality of thin film crosslinked rubber sheets,
The thin film cross-linked rubber sheet is the thin film cross-linked rubber sheet according to claim 1, wherein the uncrosslinked portions at the ends of the thin film cross-linked rubber sheet are stacked and cross-linked by radiation after irradiation and integrated. Composite thin film crosslinked rubber sheet characterized by 薄膜架橋ゴムシートの端部同士を接合させて、スリーブ状または無端ベルト状にした複合薄膜架橋ゴムシートであって、
前記薄膜架橋ゴムシートの両端部が未架橋部分である請求項１記載の薄膜架橋ゴムシートであり、該薄膜架橋ゴムシートの端部の未架橋帯部分同士を重ねて加圧成形後放射線照射により架橋して一体化させてなることを特徴とする複合薄膜架橋ゴムシート。 A composite thin film cross-linked rubber sheet in which the ends of the thin film cross-linked rubber sheet are joined to form a sleeve or endless belt,
2. The thin film crosslinked rubber sheet according to claim 1, wherein both ends of the thin film crosslinked rubber sheet are uncrosslinked portions, and the uncrosslinked band portions at the ends of the thin film crosslinked rubber sheet are overlapped with each other by radiation irradiation after pressure molding. A composite thin film cross-linked rubber sheet characterized by being integrated by cross-linking. 前記加圧成形後架橋して一体化させた接合部のシート厚さが前記残部の厚さと略同一であることを特徴とする請求項２または請求項３記載の複合薄膜架橋ゴムシート。   The composite thin film cross-linked rubber sheet according to claim 2 or 3, wherein the thickness of the joint portion formed by cross-linking and integration after the pressure forming is substantially the same as the thickness of the remaining portion. 請求項１記載の薄膜架橋ゴムシートの製造方法であって、
未架橋の薄膜ゴムシートを製造する工程と、
前記薄膜ゴムシートの端部を放射線遮蔽層で覆う工程と、
前記放射線遮蔽層で覆われない残部を放射線照射により架橋する工程とを備えることを特徴とする薄膜架橋ゴムシートの製造方法。 It is a manufacturing method of the thin film crosslinked rubber sheet according to claim 1,
Producing uncrosslinked thin film rubber sheet;
Covering the end of the thin film rubber sheet with a radiation shielding layer;
And a step of cross-linking the remainder not covered with the radiation shielding layer by radiation irradiation. 請求項２または請求項３記載の複合薄膜架橋ゴムシートの製造方法であって、
請求項５記載の製造方法で製造された薄膜架橋ゴムシートの端部の未架橋帯部分同士を重ねて加圧成形する工程と、
加圧成形後に放射線照射により架橋する工程とを備えることを特徴とする複合薄膜架橋ゴムシートの製造方法。 A method for producing a composite thin film crosslinked rubber sheet according to claim 2 or 3,
A step of pressure-molding the uncrosslinked band portions at the ends of the thin film crosslinked rubber sheet produced by the production method according to claim 5;
And a step of cross-linking by radiation irradiation after pressure molding. A method for producing a composite thin-film cross-linked rubber sheet.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5272778A (en) * 1975-12-15 1977-06-17 Firestone Tire & Rubber Co Curing of rubber sheet by radioactive ray
US4139405A (en) * 1975-10-30 1979-02-13 Mildred Kelley Seiberling Selective electron irradiation precuring of treads in tire making processes
JPS55161828A (en) * 1979-05-31 1980-12-16 Dynamit Nobel Ag Formed body made from plastic or natural rubber
JPS61283626A (en) * 1985-06-07 1986-12-13 Sumitomo Chem Co Ltd Water-proof sheet excellent in heat resistance
JPH04224826A (en) * 1990-12-26 1992-08-14 Bridgestone Corp Bonding of cord-filled raw rubber sheet material
JP2510225B2 (en) * 1987-12-03 1996-06-26 株式会社ブリヂストン Electron beam irradiation device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4139405A (en) * 1975-10-30 1979-02-13 Mildred Kelley Seiberling Selective electron irradiation precuring of treads in tire making processes
JPS5272778A (en) * 1975-12-15 1977-06-17 Firestone Tire & Rubber Co Curing of rubber sheet by radioactive ray
JPS55161828A (en) * 1979-05-31 1980-12-16 Dynamit Nobel Ag Formed body made from plastic or natural rubber
JPS61283626A (en) * 1985-06-07 1986-12-13 Sumitomo Chem Co Ltd Water-proof sheet excellent in heat resistance
JP2510225B2 (en) * 1987-12-03 1996-06-26 株式会社ブリヂストン Electron beam irradiation device
JPH04224826A (en) * 1990-12-26 1992-08-14 Bridgestone Corp Bonding of cord-filled raw rubber sheet material

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