JPS63159019A - Sheet for release - Google Patents
Sheet for releaseInfo
- Publication number
- JPS63159019A JPS63159019A JP61313560A JP31356086A JPS63159019A JP S63159019 A JPS63159019 A JP S63159019A JP 61313560 A JP61313560 A JP 61313560A JP 31356086 A JP31356086 A JP 31356086A JP S63159019 A JPS63159019 A JP S63159019A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- release agent
- molds
- parts
- release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 23
- 239000005060 rubber Substances 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000004744 fabric Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 abstract description 20
- 239000012778 molding material Substances 0.000 abstract description 18
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 9
- 229920005989 resin Polymers 0.000 abstract description 8
- 239000011347 resin Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 239000004636 vulcanized rubber Substances 0.000 abstract description 6
- 238000004073 vulcanization Methods 0.000 abstract description 4
- 239000006082 mold release agent Substances 0.000 description 25
- 238000004140 cleaning Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000004203 carnauba wax Substances 0.000 description 8
- 235000013869 carnauba wax Nutrition 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000004640 Melamine resin Substances 0.000 description 5
- 229920000877 Melamine resin Polymers 0.000 description 5
- 229920000459 Nitrile rubber Polymers 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000012744 reinforcing agent Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 description 4
- 229920003051 synthetic elastomer Polymers 0.000 description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 3
- -1 glycol ethers Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000004668 long chain fatty acids Chemical class 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 150000001451 organic peroxides Chemical class 0.000 description 3
- 150000004291 polyenes Chemical class 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 229920001897 terpolymer Polymers 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- UTOPWMOLSKOLTQ-UHFFFAOYSA-N octacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O UTOPWMOLSKOLTQ-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- VYXHVRARDIDEHS-QGTKBVGQSA-N (1z,5z)-cycloocta-1,5-diene Chemical compound C\1C\C=C/CC\C=C/1 VYXHVRARDIDEHS-QGTKBVGQSA-N 0.000 description 1
- PRBHEGAFLDMLAL-GQCTYLIASA-N (4e)-hexa-1,4-diene Chemical compound C\C=C\CC=C PRBHEGAFLDMLAL-GQCTYLIASA-N 0.000 description 1
- PRBHEGAFLDMLAL-UHFFFAOYSA-N 1,5-Hexadiene Natural products CC=CCC=C PRBHEGAFLDMLAL-UHFFFAOYSA-N 0.000 description 1
- PPWUTZVGSFPZOC-UHFFFAOYSA-N 1-methyl-2,3,3a,4-tetrahydro-1h-indene Chemical compound C1C=CC=C2C(C)CCC21 PPWUTZVGSFPZOC-UHFFFAOYSA-N 0.000 description 1
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 235000021357 Behenic acid Nutrition 0.000 description 1
- 101001024605 Homo sapiens Next to BRCA1 gene 1 protein Proteins 0.000 description 1
- 102100037001 Next to BRCA1 gene 1 protein Human genes 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229940116226 behenic acid Drugs 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- ZOLLIQAKMYWTBR-RYMQXAEESA-N cyclododecatriene Chemical compound C/1C\C=C\CC\C=C/CC\C=C\1 ZOLLIQAKMYWTBR-RYMQXAEESA-N 0.000 description 1
- UVJHQYIOXKWHFD-UHFFFAOYSA-N cyclohexa-1,4-diene Chemical compound C1C=CCC=C1 UVJHQYIOXKWHFD-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical compound C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- LMTSQIZQTFBYRL-UHFFFAOYSA-N n'-octadecylethane-1,2-diamine Chemical compound CCCCCCCCCCCCCCCCCCNCCN LMTSQIZQTFBYRL-UHFFFAOYSA-N 0.000 description 1
- SJYNFBVQFBRSIB-UHFFFAOYSA-N norbornadiene Chemical compound C1=CC2C=CC1C2 SJYNFBVQFBRSIB-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、熱硬化性樹脂成形材料用の成形金型等から
成形品を円滑に離型させるために用いられる離型用シー
トに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a mold release sheet used for smoothly releasing a molded product from a molding die for a thermosetting resin molding material. be.
エポキシ樹脂成形材料等の熱硬化性樹脂成形材料の成形
時には、上記熱硬化性樹脂成形材料中に含まれる離型剤
が金型の成形空間であるキャビティの表面に滲出して離
型作用を発揮する。このような成形を多数回繰り返すと
、成形品の離型性が著しく悪くなったり、成形品の表面
に肌荒れ等の現象を生じ、成形品表面に光沢等が出ない
という不都合を生じる。この原因は、上記成形材料中に
含まれる離型剤が成形の繰り返しにより上記キャビティ
の表面に順次積層し、次第に酸化劣化して硬い離型剤の
酸化劣化層を形成するためと考えられる。すなわち、上
記離型剤の酸化劣化層は、表面が平滑でなく、また離型
作用も有していないため、上記のような問題を生じるの
である。このため、従来は、上記エポキシ樹脂成形材料
とは別種。During molding of thermosetting resin molding materials such as epoxy resin molding materials, the mold release agent contained in the thermosetting resin molding material oozes onto the surface of the cavity, which is the molding space of the mold, and exerts a mold release effect. do. If such molding is repeated many times, the releasability of the molded product may be significantly deteriorated, the surface of the molded product may become rough, and the surface of the molded product may lack gloss. The reason for this is thought to be that the mold release agent contained in the molding material is sequentially laminated on the surface of the cavity through repeated molding, and is gradually oxidized and degraded to form a hard oxidation-degraded layer of mold release agent. That is, the oxidation-degraded layer of the mold release agent does not have a smooth surface and does not have a mold release effect, which causes the above-mentioned problems. For this reason, it has conventionally been a different type from the above-mentioned epoxy resin molding materials.
のメラミン樹脂成形材料をキャビティ内に入れ、成形を
行ってこれを加熱硬化させ、その硬化物に離型剤酸化劣
化層を一体的に付着させ、その状態で硬化物を上記金型
のキャビティから取り出すことによりキャビティ表面の
洗浄を行っている。しかしながら、このようにする場合
には、金型に多数設けられているキャビティに各別にメ
ラミン樹脂成形材料を充填し、また硬化物を取り出す必
要があり作業が極めて煩雑なうえ、成形時にメラミン樹
脂成形材料から生じる臭気により作業環境が著しく悪化
するという問題が生じている。The melamine resin molding material is put into the cavity, molded and cured by heating, and the cured product is integrally attached with the oxidation deterioration layer of the release agent, and in this state, the cured product is removed from the cavity of the mold. By taking it out, the cavity surface is cleaned. However, in this case, it is necessary to separately fill the many cavities in the mold with melamine resin molding material and take out the cured material, which is extremely complicated. A problem has arisen in that the working environment is significantly deteriorated due to odors generated from the materials.
そこで、本発明者らは、最近、未加硫ゴム生地を母材と
し、その母材中にグリコールエーテル類を含有させたシ
ート状の金型洗浄剤組成物を開発しすでに特許出願（特
願昭６１−２５２５３６号）している、このシート状の
金型洗浄剤組成物による金型洗浄は、上記シート状組成
物を上下の金型間に挟み、型閉成時の圧力によって金型
の各キャビティの表面にそれぞれ対応するシートの部分
を圧接させ、その状態で加熱加硫させて上記未加硫ゴム
生地全体を加硫ゴム化し、この加硫ゴム化の際に、キャ
ビティ表面の離型剤酸化劣化層を加硫ゴムに一体化し、
ついでシート状の一枚の加硫ゴムを金型から剥離させる
ことにより、キャビティ表面を洗浄するということによ
り行われる。このような金型洗浄剤組成物を使用すると
、上記熱硬化性メラミン樹脂成形材料を用いたときのよ
うな問題を生じない、そして、金型のキャビティ表面も
メラミン樹脂成形材料洗浄と同様、初期の鏡面状態まで
洗浄される。Therefore, the present inventors have recently developed a sheet-shaped mold cleaning agent composition that uses unvulcanized rubber fabric as a base material and contains glycol ethers in the base material, and has already applied for a patent (patent application). Mold cleaning using this sheet-like mold cleaning agent composition is carried out by sandwiching the sheet-like composition between upper and lower molds, and the mold is cleaned by the pressure when the molds are closed. The corresponding parts of the sheet are brought into pressure contact with the surface of each cavity, and heated and vulcanized in that state to turn the entire unvulcanized rubber fabric into vulcanized rubber. During this vulcanization, the surface of the cavity is released from the mold. The agent oxidation deteriorated layer is integrated into the vulcanized rubber,
Next, the surface of the cavity is cleaned by peeling off a sheet of vulcanized rubber from the mold. When such a mold cleaning agent composition is used, the problems that occur when using the above-mentioned thermosetting melamine resin molding material do not occur, and the mold cavity surface is also cleaned in the initial stage as in the case of cleaning the melamine resin molding material. Cleaned to a mirror-like finish.
しかしながら、上記のような金型洗浄剤組成物を用いた
り、また熱硬化性メラミン樹脂成形材料を用いてキャビ
ティ等の表面を洗浄する場合、キャビティ表面等の金型
面が鏡面状態にまで洗浄され、金型面には離型剤が存在
しなくなる。ところが、このように金型面が完全に洗浄
化されると、洗浄化直後の成形に際して、成形品が金型
面に付着し円滑に離型しない、これは、金型面が完全浄
化されているため、１回の成形程度では成形材料から滲
出する離型剤によって金型面に離型剤が充分付着しない
ことに起因する。そのため、上記金型面の洗浄後、離型
剤をスプレーから吹き付けたりすること等が提案され一
部で実施されているが、このようにすると離型性は付与
されるものの、金型面に対して離型剤の濃度差を生じ、
場合によっては、成形品の表面に上記離型剤が付着し製
品の外観を低下させたり、スプレ一時に、金型面以外に
離型剤が付着し成形条件を著しく悪化させたり、また噴
霧された離型剤の吸引で作業員の健康が害される等の問
題が生じている。そのため、実際には、上記洗浄後、エ
ポキシ樹脂成形材料を５ショット程度成形（これをダミ
ー成形と称する）し、成形材料中に含まれる内部離型剤
を金型表面に充分付着させたのち、通常の成形を行うと
いうことがなされている。ところが、このようにダミー
ショットを５シヨツトも行うことは、極めて不経済であ
り、これが成形の効率低下の原因となっている。However, when cleaning the surfaces of cavities and the like using the above-mentioned mold cleaning agent compositions or thermosetting melamine resin molding materials, the mold surfaces such as the cavity surfaces are cleaned to a mirror-like state. , the mold release agent no longer exists on the mold surface. However, when the mold surface is completely cleaned in this way, during molding immediately after cleaning, the molded product adheres to the mold surface and cannot be released smoothly. This is because the mold surface is not completely cleaned. This is because the mold release agent oozes from the molding material and does not adhere sufficiently to the mold surface during one molding. For this reason, spraying a mold release agent after cleaning the mold surface has been proposed and has been carried out in some cases, but although this method provides mold releasability, it does not affect the mold surface. On the other hand, there is a difference in the concentration of the mold release agent,
In some cases, the above-mentioned mold release agent may adhere to the surface of the molded product, deteriorating the appearance of the product, or during spraying, the mold release agent may adhere to areas other than the mold surface, significantly deteriorating molding conditions. Problems have arisen, such as the health of workers being harmed by inhalation of mold release agents. Therefore, in reality, after the above cleaning, the epoxy resin molding material is molded for about 5 shots (this is called dummy molding), and the internal mold release agent contained in the molding material is sufficiently adhered to the mold surface. Normal molding is performed. However, performing as many as five dummy shots in this manner is extremely uneconomical, and this causes a decrease in molding efficiency.
この発明は、このような事情に鑑みなされたもので、洗
浄後の金型面に対する離型剤の付与を均一に、かつ成形
条件等の悪化や作業環境等の悪化を招くことなく、しか
も容易に行うことができる離型用シートの提供をその目
的とする。This invention was made in view of the above circumstances, and it is possible to uniformly apply a mold release agent to the mold surface after cleaning, without causing deterioration of molding conditions, etc. or deterioration of the working environment, etc., and easily. The purpose is to provide a mold release sheet that can be used for various purposes.
上記の目的を達成するため、この発明の離型用シートは
、未加硫ゴム生地を母材とし、離型剤が含有されている
という構成をとる。In order to achieve the above object, the release sheet of the present invention uses an unvulcanized rubber fabric as a base material and contains a release agent.
すなわち、上記シートには、離型剤が含有されているた
め、これを金型面が洗浄化され鏡面化されている状態の
金型間に挟んで加熱加硫することにより、未加硫ゴム生
地から離型剤が滲出して金型面に付着し、金型面に対し
て均一な離型剤膜を形成するようになる。要約すれば、
金型間に上記シートを挟んで１回加熱成形し、ついでシ
ートを剥離するという簡単な作業により、洗浄化され鏡
面状になっている金型面に対して、均一に離型剤膜の形
成を行うことができるようになる。したがって、スプレ
ー塗布のような離型剤の付与の不均一、成形条件および
作業環境の悪化等を招くことがない、しかも、上記作業
は、極めて筒便であるため、離型剤の付与作業の作業効
率の大幅な向上を実現しうるようになる。In other words, since the above-mentioned sheet contains a mold release agent, it is sandwiched between molds whose mold surfaces have been cleaned and mirror-finished, and heated and vulcanized to form unvulcanized rubber. The release agent exudes from the dough and adheres to the mold surface, forming a uniform release agent film on the mold surface. In summary,
By simply inserting the above sheet between molds, heating and forming it once, and then peeling off the sheet, a release agent film can be uniformly formed on the cleaned and mirror-like surface of the mold. You will be able to do this. Therefore, it does not cause uneven application of the mold release agent or deterioration of the molding conditions and working environment, as is the case with spray coating.Furthermore, since the above-mentioned work is extremely tedious, it is difficult to apply the mold release agent. It will be possible to realize a significant improvement in work efficiency.
この発明の離型用シートは、未加硫ゴム生地を母材と、
これに離型剤を含有させて得られるものであって、両成
分原料を公知の方法で混合したのち、シート状に加工さ
れて得られる。The release sheet of this invention has an unvulcanized rubber fabric as a base material,
It is obtained by adding a mold release agent to this mixture, and after mixing the raw materials of both components by a known method, it is processed into a sheet shape.
上記未加硫ゴム生地を構成する未加硫ゴムとしては、天
然ゴム（ＮＲ）、クロロプレンゴム（ＣＲ）、ブタジェ
ンゴム（ＢＲ）、ニトリルゴム（ＮＢＲ）、エチレンプ
ロピレンターポリマーゴム（ＥＰＴ）、エチレンプロピ
レンゴム（ＥＰＭ）、スチレンブタジェンゴム（ＳＢＲ
）、ポリイソプレンゴム（ＩＲ）、ブチルゴム（ＩＩＲ
）、 シリコーンゴム（Ｑ）、フッ素ゴム（ＦＫＭ）
等があげられる。未加硫ゴム生地は、上記ゴムを単独で
もしくは併用し、これに加硫剤を配合し、必要に応じて
加硫促進剤、補強剤２着色剤等を配合して構成される。The unvulcanized rubber constituting the above-mentioned unvulcanized rubber fabric includes natural rubber (NR), chloroprene rubber (CR), butadiene rubber (BR), nitrile rubber (NBR), ethylene propylene terpolymer rubber (EPT), and ethylene propylene. rubber (EPM), styrene butadiene rubber (SBR)
), polyisoprene rubber (IR), butyl rubber (IIR)
), silicone rubber (Q), fluororubber (FKM)
etc. can be mentioned. The unvulcanized rubber fabric is made by using the above-mentioned rubber alone or in combination, blending a vulcanizing agent therein, and blending a vulcanization accelerator, a reinforcing agent, a coloring agent, etc. as necessary.
このような未加硫ゴム生地は、金型内において加硫され
加硫ゴムとなる。上記の未加硫ゴム生地として好ましい
のはＥＰＴ、ＬＢＲ、ＮＢＲもしくはこれらの混合物を
用いたものである。上記ＥＰＴは、エチレン、α−オレ
フィンおよび非共役二重結合を有する環状または非環状
からなる共重合物である。これについて詳述すると、Ｅ
ＰＴは、エチレン、α−オレフにン（特にプロピレン）
およびポリエンモノマーからなるターポリマーであり、
上記ポリエンモノマーとしては、ジシクロペンタジェン
、１．５−シクロオクタジエン、１．１−シクロオクタ
ジエン、１．６−シクロドゾカジエン、１．７−シクロ
ドゾカジエン、１．５．９−シクロドデカトリエン、１
゜４−シクロへブタジェン、１．４−シクロヘキサジエ
ン、ノルボルナジェン、メチレンノルボルネン、２−メ
チルペンタジェン−１，４，１，５−へキサジエン、１
．６−へブタジェン、メチル−テトラヒドロインデン、
１．４−ヘキサジエン等があげられる。各モノマーの共
重合割合は、好ましくはエチレンが３０〜８０モル％、
ポリエンが０．１〜２０モル％で残りがα−オレフィン
である、より好ましいのはエチレンが３０〜６０モル％
のものである。そして、ムーニー粘度ＭＬｌ＋ａ （
１００℃）が２０〜７０のものがよい。上記ＥＰＴの具
体例としては、三井石油化学工業社製、三井ＥＰＴ４０
２１．同４０４５．同４０７０をあげることができる。Such unvulcanized rubber dough is vulcanized in a mold to become vulcanized rubber. The above-mentioned unvulcanized rubber fabric is preferably one using EPT, LBR, NBR or a mixture thereof. The EPT is a cyclic or acyclic copolymer having ethylene, an α-olefin, and a nonconjugated double bond. To elaborate on this, E
PT is ethylene, α-olefin (especially propylene)
and a terpolymer consisting of a polyene monomer,
The polyene monomers include dicyclopentadiene, 1.5-cyclooctadiene, 1.1-cyclooctadiene, 1.6-cyclodozocadiene, 1.7-cyclodozocadiene, 1.5.9 -cyclododecatriene, 1
゜4-cyclohebutadiene, 1,4-cyclohexadiene, norbornadiene, methylene norbornene, 2-methylpentadiene-1,4,1,5-hexadiene, 1
．． 6-hebutadiene, methyl-tetrahydroindene,
Examples include 1,4-hexadiene. The copolymerization ratio of each monomer is preferably 30 to 80 mol% of ethylene,
Polyene is 0.1 to 20 mol% and the remainder is α-olefin, more preferably ethylene is 30 to 60 mol%.
belongs to. And Mooney viscosity MLl+a (
100°C) is preferably 20 to 70. As a specific example of the above EPT, Mitsui EPT40 manufactured by Mitsui Petrochemical Industries, Ltd.
21. 4045. I can give you 4070.
また、前記ＳＢＲとしては、スチレン含量が１５〜３０
モル％でムーニー粘度ＭＬ、、、 （１００℃）が２
０〜８ｏ１好ましくは３５〜６０のものが好適である。In addition, the SBR has a styrene content of 15 to 30
Mooney viscosity ML in mol%, (100℃) is 2
0 to 8o1, preferably 35 to 60, is suitable.
具体例として、日本合成ゴム社製、ＪＳＲ−１５０２，
同１５０７、同１７７８をあげることができる。ＮＢＲ
としては、アクリロニトリル含量が２０〜６０モル％、
好ましくは２５〜４５モル％でムーニー粘度ＭＬ１．４
（１００℃）が２０〜８５、好ましくは３０〜７０
のものを用いることが好適である。具体例として、日本
合成ゴム社製、Ｎ−２３４Ｌ。As a specific example, JSR-1502 manufactured by Japan Synthetic Rubber Co., Ltd.
1507 and 1778 can be mentioned. NBR
As, the acrylonitrile content is 20 to 60 mol%,
Mooney viscosity ML1.4 preferably at 25 to 45 mol%
(100℃) is 20-85, preferably 30-70
It is preferable to use the following. A specific example is N-234L manufactured by Japan Synthetic Rubber Co., Ltd.
同２３０ Ｓ、同２３０ＳＨをあげることができる。230S and 230SH can be mentioned.
上記離型剤としては、ステアリン酸、ベヘニン酸のよう
な長鎖脂肪酸、ステアリン酸亜鉛、ステアリン酸カルシ
ウムで代表される長鎖脂肪酸の金属塩、カルナバワック
ス、センクンワックス。モンタン酸の部分ケン化エステ
ルで代表されるエステル系ワックス、ステアリルエチレ
ンジアミドで代表される長鎖脂肪酸アミド、ポリエチレ
ンワックスに代表されるパラフィン類等があげられる。Examples of the mold release agent include long-chain fatty acids such as stearic acid and behenic acid, metal salts of long-chain fatty acids such as zinc stearate and calcium stearate, carnauba wax, and Senkun wax. Examples include ester waxes represented by partially saponified esters of montanic acid, long-chain fatty acid amides represented by stearyl ethylene diamide, and paraffins represented by polyethylene wax.
この発明の離型用シートは、上記離型剤と上記未加硫ゴ
ムとを公知の方法、例えばカレンダーロール等を用いて
混合することによって得ることができ、また、予め未加
硫ゴム生地をつくり、これに離型剤を練り込む等の方法
によっても得ることができる。これらの場合、離型剤は
、未加硫ゴム生地１００重量部（以下「部」と略す）に
対して、通常、１〜５０部配合される。好ましいのは３
〜２０部である。そして、上記離型剤としては、その融
点が２００℃以下、また沸点が２００’Ｃ以上であるも
のが好ましい。さらに、好ましいのは融点が５０〜１５
０℃のものである。すなわち、金型成形は、通常、１５
０〜２００’Ｃで行われるのであり、上記離型剤の融点
が２００”Ｃより大きければ、金型面に滲出せず、また
、沸点が２００℃未満であれば、金型に滲出しても蒸発
してしまうために機能を果たさなくなる傾向がみられる
からである。The release sheet of the present invention can be obtained by mixing the above-mentioned release agent and the above-mentioned unvulcanized rubber using a known method, for example, using a calendar roll or the like. It can also be obtained by a method such as making a mold and kneading a mold release agent into it. In these cases, the mold release agent is usually mixed in 1 to 50 parts per 100 parts by weight (hereinafter abbreviated as "parts") of the unvulcanized rubber dough. 3 is preferable
~20 copies. The above mold release agent preferably has a melting point of 200°C or less and a boiling point of 200'C or more. Furthermore, it is preferable that the melting point is 50 to 15.
It is at 0°C. That is, mold molding usually requires 15
If the melting point of the mold release agent is higher than 200"C, it will not ooze onto the mold surface, and if the boiling point is less than 200"C, it will not ooze into the mold. This is because they tend to no longer function as they evaporate.
なお、この発明の離型用シートには、補強剤としてシリ
カ、アルミナ、炭酸カルシウム、水酸化アルミニウム、
酸化チタン等の無機質補強剤（充填剤）を配合すること
も可能である。この場合、補強剤の使用量は、未加硫ゴ
ム生地１００部に対し１０〜５０部に設定することが好
適である。また、金型洗浄用シートと離型用シートの使
い分けのためには、上記２種類のシートを色分けしてお
くことが好適である。The release sheet of this invention contains silica, alumina, calcium carbonate, aluminum hydroxide, and reinforcing agents.
It is also possible to blend an inorganic reinforcing agent (filler) such as titanium oxide. In this case, the amount of reinforcing agent used is preferably set at 10 to 50 parts per 100 parts of the unvulcanized rubber fabric. Further, in order to use the mold cleaning sheet and the mold release sheet properly, it is preferable to color-code the two types of sheets.
この発明の離型用シートは、以上のように構成されてい
るため、単に、金型間に挟んで加熱加硫したのち、金型
から取り出すということにより、金型面に対して均一に
離型剤を付着させることができるようになる。したがっ
て、これを用いることにより従来のように、金型洗浄化
後、５シヨツトものダミーショットを行う必要がなくな
り極めて経済的である。また、スプレーを用いて離型剤
を塗布する場合に比べて、作業の容易化を達成しうるば
かりでなく、成形条件２作業環境の悪化を招かず、しか
も離型剤の均一付与を実現しうるという利点を備えてい
る。Since the mold release sheet of the present invention is constructed as described above, it can be released uniformly from the mold surface by simply sandwiching it between molds, heating and vulcanizing it, and then taking it out from the mold. The molding agent can now be attached. Therefore, by using this, it is not necessary to perform as many as five dummy shots after cleaning the mold as in the conventional method, which is extremely economical. In addition, compared to applying a mold release agent using a spray, it not only makes the work easier, but also does not cause deterioration of the working environment under molding conditions 2, and can evenly apply the mold release agent. It has the advantage of being flexible.
つぎに、実施例について比較例と併せて詳しく説明する
。Next, examples will be described in detail together with comparative examples.
〔実施例１〕
エチレンプロピレンターポリマーゴム（ＥＰＴ、三井石
油化学工業社製、三井ＥＰＴ４０４５）１００部、シリ
カパウダー２０部、酸化チタン５部、有機過酸化物４部
およびカルナバワックス２０部を配合し、これを圧延ロ
ールを用いて厚み７鶴のシート状に形成し、目的とする
離型用シートを得た。[Example 1] 100 parts of ethylene propylene terpolymer rubber (EPT, manufactured by Mitsui Petrochemical Industries, Ltd., Mitsui EPT4045), 20 parts of silica powder, 5 parts of titanium oxide, 4 parts of organic peroxide, and 20 parts of carnauba wax were blended. This was formed into a sheet with a thickness of 7 mm using a rolling roll to obtain the intended release sheet.
Ｃ実施例２Ｊ
カルナバワックスの使用割合を３部に減少した、それ以
外は、実施例１と同様にして離型用シートを得た。C Example 2J A release sheet was obtained in the same manner as in Example 1, except that the proportion of carnauba wax used was reduced to 3 parts.
〔実施例３〕
カルナバワックスの使用割合を５０部に増加した。それ
以外は実施例１と同様にして離型用シートを得た。[Example 3] The proportion of carnauba wax used was increased to 50 parts. A release sheet was obtained in the same manner as in Example 1 except for the above.
〔実施例４〕
カルナバワックスに代えて、ステアリン酸亜鉛（日本油
脂化学社製、ジンクステアレートＤ）を用いた。それ以
外は、実施例１と同様にして離型用シートを得た。[Example 4] Zinc stearate (manufactured by NOF Chemical Co., Ltd., Zinc Stearate D) was used in place of carnauba wax. A release sheet was obtained in the same manner as in Example 1 except for the above.
〔実施例５〕
スチレンブタジェンゴム（Ｓ Ｂ Ｒ，日本合成ゴム社
製、ＪＳＲ−１５０２）１００部、シリカパウダー２０
部、水酸化アルミニウム１５部、有機過酸化物４部およ
びカルナバワックス２０部を用い、実施例１と同様にし
て離型用シートを得た。[Example 5] 100 parts of styrene butadiene rubber (SBR, manufactured by Japan Synthetic Rubber Co., Ltd., JSR-1502), 20 parts of silica powder
A release sheet was obtained in the same manner as in Example 1 using 15 parts of aluminum hydroxide, 4 parts of organic peroxide, and 20 parts of carnauba wax.
〔実施例６〕
ニトリルゴム（ＮＢＲ１日本合成ゴム社製、Ｎ−２３０
ＳＨ）１００部、シリカパウダー２０部、酸化チタン５
部、有機過酸化物４部およびカルナバワックス２０部を
用い、実施例１と同様にして離型用シートを得た。[Example 6] Nitrile rubber (NBR1 manufactured by Japan Synthetic Rubber Co., Ltd., N-230
SH) 100 parts, silica powder 20 parts, titanium oxide 5
A release sheet was obtained in the same manner as in Example 1 using 1 part, 4 parts of organic peroxide, and 20 parts of carnauba wax.
〔実施例７〕
カルナバワックスを単独で用いるのではなく、実施例４
で用いたステアリン酸亜鉛と併用（１０：１０）した、
それ以外は、実施例１と同様にして離型用シートを得た
。[Example 7] Instead of using carnauba wax alone, Example 4
Combined use (10:10) with zinc stearate used in
A release sheet was obtained in the same manner as in Example 1 except for the above.
〔比較例１〕
ダミーショット用の熱硬化性樹脂としてエポキシ樹脂成
形材料（日東電工社製、ＭＰ−１０）を用いた。[Comparative Example 1] An epoxy resin molding material (manufactured by Nitto Denko Corporation, MP-10) was used as a thermosetting resin for dummy shots.
以上の実施例で得られた離型用シートを、金型洗浄の終
了した熱硬化性樹脂成形用金型に挟み、１７５℃で４分
間加硫し、加硫後ただちに金型を開いて、成形された加
硫ゴムを取り出した。その後、上記のようにして離型剤
の付与された金型を用い、通常の成形方法で、熱硬化性
樹脂成形材料エポキシ樹脂成形材料（日東電工社製１表
にまとめて示した。ＭＰ−１０）を成形し、成形品の離
型状態を調べ、その結果を比較例１の結果（ダミーショ
ット１回）と併せて後記の表に示した。The mold release sheet obtained in the above example was sandwiched between the thermosetting resin molding molds that had been cleaned, and vulcanized at 175°C for 4 minutes. Immediately after vulcanization, the molds were opened. The molded vulcanized rubber was taken out. Thereafter, using the mold to which the mold release agent was applied as described above, a thermosetting resin molding material epoxy resin molding material (manufactured by Nitto Denko Co., Ltd., summarized in Table 1.MP- 10) was molded and the release state of the molded product was examined, and the results are shown in the table below together with the results of Comparative Example 1 (one dummy shot).
（以下余白）
（以下余白）
上記の表から明らかなように、実施例によれば、比較例
に比べて、極めて良好な離型性を付与しうろことがわか
る。(Hereinafter referred to as a margin) (hereinafter referred to as a margin) As is clear from the table above, it can be seen that the examples provide extremely good mold releasability compared to the comparative examples.
Claims (2)
いることを特徴とする離型用シート。(1) A release sheet characterized by having an unvulcanized rubber fabric as a base material and containing a release agent.
１〜５０重量部含有されている特許請求の範囲第１項記
載の離型用シート。(2) The release sheet according to claim 1, wherein the release agent is contained in an amount of 1 to 50 parts by weight based on 100 parts by weight of the unvulcanized rubber dough.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61313560A JPS63159019A (en) | 1986-12-23 | 1986-12-23 | Sheet for release |
| MYPI87003233A MY101701A (en) | 1986-12-23 | 1987-12-21 | Mold-releasing sheet and method for applying mold- releasing agent onto mold surface using said sheet. |
| PH36286A PH25385A (en) | 1986-12-23 | 1987-12-22 | Mold-releasing sheet, method for applying mold-releasing agent |
| EP87119049A EP0272685B1 (en) | 1986-12-23 | 1987-12-22 | Mold-releasing sheet and method for applying mold-releasing agent onto mold surface using said sheet |
| DE8787119049T DE3778667D1 (en) | 1986-12-23 | 1987-12-22 | SHEET WITH RELEASE AGENT FOR HOLLOW SHAPES AND METHOD FOR FEEDING THE RELEASE AGENT ON THE SURFACE OF A HOLLOW SHAPE WITH THIS SHEET. |
| KR1019870014790A KR950013276B1 (en) | 1986-12-23 | 1987-12-23 | Mold-releasing sheet and method for applying mold-releasing agent onto mold surface using said sheet |
| US07/268,674 US4956132A (en) | 1986-12-23 | 1988-11-07 | Method for applying mold-releasing agent onto mold surfaces using a mold-releasing sheet |
| SG109494A SG109494G (en) | 1986-12-23 | 1994-08-08 | Mold-releasing sheet and method for applying mold-releasing agent onto mold surface using said sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61313560A JPS63159019A (en) | 1986-12-23 | 1986-12-23 | Sheet for release |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63159019A true JPS63159019A (en) | 1988-07-01 |
| JPH0564562B2 JPH0564562B2 (en) | 1993-09-14 |
Family
ID=18042780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61313560A Granted JPS63159019A (en) | 1986-12-23 | 1986-12-23 | Sheet for release |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63159019A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013082150A (en) * | 2011-10-11 | 2013-05-09 | Nitto Denko Corp | Mold releasing and recovering sheet and mold releasing processing method |
| JP5726517B2 (en) * | 2008-03-31 | 2015-06-03 | 日本カーバイド工業株式会社 | Rubber composition for mold release recovery |
| JP2015186877A (en) * | 2014-03-27 | 2015-10-29 | 日本カーバイド工業株式会社 | Mold release restoring resin composition and mold release restoring method using the same |
-
1986
- 1986-12-23 JP JP61313560A patent/JPS63159019A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5726517B2 (en) * | 2008-03-31 | 2015-06-03 | 日本カーバイド工業株式会社 | Rubber composition for mold release recovery |
| JP2013082150A (en) * | 2011-10-11 | 2013-05-09 | Nitto Denko Corp | Mold releasing and recovering sheet and mold releasing processing method |
| JP2015186877A (en) * | 2014-03-27 | 2015-10-29 | 日本カーバイド工業株式会社 | Mold release restoring resin composition and mold release restoring method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0564562B2 (en) | 1993-09-14 |
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