JPH0465236A - Laminated foamed body and preparation thereof - Google Patents
Laminated foamed body and preparation thereofInfo
- Publication number
- JPH0465236A JPH0465236A JP17997390A JP17997390A JPH0465236A JP H0465236 A JPH0465236 A JP H0465236A JP 17997390 A JP17997390 A JP 17997390A JP 17997390 A JP17997390 A JP 17997390A JP H0465236 A JPH0465236 A JP H0465236A
- Authority
- JP
- Japan
- Prior art keywords
- foam
- fluororubber
- silicone rubber
- layer
- foam layer
- 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
- 239000006260 foam Substances 0.000 claims abstract description 129
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 57
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 54
- 239000004945 silicone rubber Substances 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 239000004944 Liquid Silicone Rubber Substances 0.000 claims abstract description 11
- 238000005187 foaming Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000004073 vulcanization Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 229910052731 fluorine Inorganic materials 0.000 abstract description 4
- 239000011737 fluorine Substances 0.000 abstract description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 53
- 229920001971 elastomer Polymers 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 238000006482 condensation reaction Methods 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000003060 catalysis inhibitor Substances 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- -1 organic acid salt Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、フッ素ゴム発泡層とシリコーンゴム発泡層と
からなる積層発泡体とその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a laminated foam comprising a fluororubber foam layer and a silicone rubber foam layer, and a method for producing the same.
［従来の技術と発明が解決しようとする課題］フッ素ゴ
ム発泡体は、耐熱性、耐薬品性に優れており、耐熱配管
、耐熱容器、耐熱機器用のガスケット、耐薬品材料用ガ
スケットなどとして、利用されている。[Prior art and problems to be solved by the invention] Fluororubber foam has excellent heat resistance and chemical resistance, and can be used as heat-resistant piping, heat-resistant containers, gaskets for heat-resistant equipment, gaskets for chemical-resistant materials, etc. It's being used.
しかし、フッ素ゴムを用いて、厚みが１５隨以上で均一
な発泡体を製造することは困難である。However, it is difficult to produce a uniform foam with a thickness of 15 mm or more using fluororubber.
すなわち、フッ素ゴム発泡体は、一般に、フッ素ゴム原
料に発泡剤を混練した発泡性生地を、金型内で加熱によ
り発泡剤を分解発泡させるとともに加硫とのバランスを
とりなから発泡し、製造される。厚みの大きな発泡体を
得るために、厚肉の生地を発泡させる場合、表層部は短
時間で発泡温度に達するが、熱伝導性の劣るゴムの内部
には熱が伝わりに＜＜、場合によっては表層部の発泡に
伴ない断熱性が大きくなるので、内部が所定温度に達す
るには長時間を要する。その結果、表層部と内部との温
度差が大きくなり、均一な発泡体が得られない。In other words, fluororubber foam is generally produced by foaming a foamed dough made by kneading a foaming agent into a fluororubber raw material in a mold by heating it in a mold to decompose and foam the foaming agent while also maintaining a balance with vulcanization. be done. When foaming a thick fabric to obtain a thick foam, the surface layer reaches the foaming temperature in a short time, but the heat is transferred inside the rubber, which has poor thermal conductivity, and in some cases As the foaming of the surface layer increases, the heat insulating property increases, so it takes a long time for the inside to reach a predetermined temperature. As a result, the temperature difference between the surface layer and the inside increases, making it impossible to obtain a uniform foam.
一方、フッ素ゴム単独で厚み１５龍を越える厚肉の発泡
体を得るために、複数のフッ素ゴムの発泡体を積層して
接合することか考えられる。しかし、フッ素ゴムは化学
的に不活性であり、いずれの接着剤に対しても親和性を
有しないために、接合一体性の大きな積層体が得られな
い。On the other hand, in order to obtain a thick foam with a thickness exceeding 15 mm using fluororubber alone, it is conceivable to laminate and bond a plurality of fluororubber foams. However, since fluororubber is chemically inert and has no affinity for any adhesive, a laminate with high bonding integrity cannot be obtained.
また、フッ素ゴムは耐寒性に劣り、発泡体にすることに
より若干改良されるが、その低温での柔軟性および弾力
性はなお乏しい。これらの特性を向上するために積層に
よる複合化か考えられるか、前記のように、適当な接着
剤が存在しないために複合化が困難である。Furthermore, fluororubber has poor cold resistance, and although this can be improved somewhat by forming it into a foam, its flexibility and elasticity at low temperatures are still poor. In order to improve these properties, compounding by lamination may be considered, but as mentioned above, compounding is difficult because a suitable adhesive does not exist.
このように、フン素ゴム発泡体は、厚み１５龍以上の厚
肉製品を成形しにくいこと、および耐寒性などの特性を
付与できないことから、その用途か制限される。As described above, the use of fluorine rubber foam is limited because it is difficult to mold into thick-walled products with a thickness of 15 mm or more, and because properties such as cold resistance cannot be imparted.
従って、本発明の目的は、フッ素ゴム発泡層を有するに
も拘らず、接合一体性が大きく、耐寒性なとが付与され
、かつ耐熱性や耐薬品性を低下させることのない厚肉の
積層発泡体を提供することにある。Therefore, an object of the present invention is to create a thick laminated layer that has high bonding integrity and cold resistance despite having a fluororubber foam layer, and that does not reduce heat resistance or chemical resistance. Our goal is to provide foam.
本発明の他の目的は、上記の如き優れた特性を有する積
層発泡体の製造方法を提供することにある。Another object of the present invention is to provide a method for producing a laminated foam having the above-mentioned excellent properties.
［発明の構成コ
本発明者は、上記目的を達成すべく鋭意検討を重ねた結
果、フッ素ゴム発泡体の表面を形成している緻密なスキ
ン層を除去すると、気泡が開口して凹凸面が現われるこ
と；この凹凸面の凹凸を利用すれば、アンカー効果等に
より、耐寒性などに優れるシリコーンゴム発泡体と複合
化できることを見出し、本発明の完成に至った。[Structure of the Invention] As a result of extensive studies to achieve the above object, the present inventor found that when the dense skin layer forming the surface of the fluororubber foam is removed, the air bubbles open and the uneven surface becomes uneven. It has been discovered that by utilizing the unevenness of this uneven surface, it can be composited with a silicone rubber foam that has excellent cold resistance due to the anchor effect and the like, leading to the completion of the present invention.
すなわち、本発明は、フッ素ゴム発泡層とシリコーンゴ
ム発泡層とが積層された積層発泡体を提供するものであ
る。That is, the present invention provides a laminated foam in which a fluororubber foam layer and a silicone rubber foam layer are laminated.
また、本発明は、フッ素ゴム発泡体のスキン層を除去し
、接合面を形成する工程；該接合面に、発泡可能な液状
ンリコーンゴム原料を適用する工程；および該液状ンリ
コーンゴム原料を加硫および発泡させる工程を含む積層
発泡体の製造方法を提供する。The present invention also provides a step of removing the skin layer of the fluororubber foam to form a joint surface; a step of applying a foamable liquid silicone rubber raw material to the joint surface; and a step of vulcanizing and foaming the liquid silicone rubber raw material. Provided is a method for producing a laminated foam including the step of:
本発明に用いられるフッ素ゴムは、フッ素を含有するゴ
ム状物質であればよく、その化学的組成は特に制限され
ない。フッ素ゴム発泡層の発泡倍率は、例えば１．５〜
２０倍程度、その厚みは約１５１１Ｉ１１以下である。The fluororubber used in the present invention may be any rubbery substance containing fluorine, and its chemical composition is not particularly limited. The foaming ratio of the fluororubber foam layer is, for example, 1.5 to
The thickness is approximately 20 times larger than that, and the thickness is approximately 1511I11 or less.
本発明の積層発泡体は、上記のようなフッ素ゴム発泡層
とシリコーンゴム発泡層とが、接着剤を使用せずに、フ
ッ素ゴム発泡層の凹凸部にシリコーンゴム発泡層の少な
くとも一部か侵入して係止している、いわゆるアンカー
効果等により、直接接合している。In the laminated foam of the present invention, the fluororubber foam layer and the silicone rubber foam layer as described above penetrate at least a portion of the silicone rubber foam layer into the uneven portions of the fluororubber foam layer without using an adhesive. They are directly connected by the so-called anchor effect.
シリコーンゴム発泡層の発泡倍率は、用いる原料組成あ
るいは発泡機構により異なるが、例えば１．５〜１０倍
、好ましくは２〜６倍程度である。The foaming ratio of the silicone rubber foam layer varies depending on the raw material composition or foaming mechanism used, but is, for example, about 1.5 to 10 times, preferably about 2 to 6 times.
シリコーンゴム発泡層の厚みは、所望する積層発泡体の
耐寒性、柔軟性等により適宜選択される。The thickness of the silicone rubber foam layer is appropriately selected depending on the desired cold resistance, flexibility, etc. of the laminated foam.
積層体の構造としては、フッ素ゴム発泡層の少なくとも
一方の面にシリコーンゴム発泡層が積層されていればよ
い。例えば、第１図に示すようなフッ素ゴム発泡層（１
）とシリコーンゴム発泡層（２）との二層構造が挙げら
れる。第１図において、例えば、フッ素ゴム発泡層（１
）は厚み０．５〜５１程度、シリコーンゴム発泡層（２
）は厚み２５〜５０１程度に形成できる。二層構造のほ
か、２つのフッ素ゴム発泡層（Ｉｌａ）と（ｌｌｂ）と
の間にシリコーンコム発泡層（１２）が介在するサンド
イッチ構造（第２図）、フッ素ゴム発泡層とシリコーン
ゴム発泡層とが交互に積層した多層構造；或いは直方体
形のシリコーンゴム発泡層（２２）の外周にフッ素コム
発泡層（２１）を接合一体止した構造（第３図）なども
含まれる。The structure of the laminate may be such that a silicone rubber foam layer is laminated on at least one surface of a fluororubber foam layer. For example, a fluororubber foam layer (1
) and a silicone rubber foam layer (2). In FIG. 1, for example, the fluororubber foam layer (1
) has a thickness of about 0.5 to 51 mm, and the silicone rubber foam layer (2
) can be formed to have a thickness of about 25 to 50 mm. In addition to the two-layer structure, there is also a sandwich structure (Figure 2) in which a silicone comb foam layer (12) is interposed between two fluororubber foam layers (Ila) and (llb), and a fluororubber foam layer and a silicone rubber foam layer. It also includes a multilayer structure in which fluorocarbon foam layers (21) are integrally bonded to the outer periphery of a rectangular parallelepiped-shaped silicone rubber foam layer (22) (FIG. 3).
積層体の形状は、例えば、平板状、断面多角形状、円筒
状などが用途に応して適宜選択できる。The shape of the laminate can be appropriately selected depending on the purpose, such as a flat plate, a polygonal cross section, or a cylindrical shape.
ガスケットとして用いる場合、例えば、平板状が好まし
い。When used as a gasket, for example, a flat plate shape is preferable.
以上のような構成を有する積層発泡体は、■フッ素ゴム
発泡層とシリコーンゴム発泡層とがアンカー効果等によ
り直接接合しているので、一体性が大きい。また、■シ
リコーンゴム発泡層は、フッ素ゴム発泡層と同程度の耐
熱性を有しているので、積層発泡体の耐熱性の低下か少
ない。さらに、■シリコーンゴム発泡層と組合わせて複
合化することによって、フッ素ゴム発泡層を有する積層
発泡体に耐寒性、弾力性、柔軟性等の特性を付与し、圧
縮永久歪も改良することができる。The laminated foam having the above structure has high integrity because (1) the fluororubber foam layer and the silicone rubber foam layer are directly bonded to each other by an anchor effect or the like. In addition, (2) the silicone rubber foam layer has heat resistance comparable to that of the fluororubber foam layer, so the heat resistance of the laminated foam is less reduced. Furthermore, by combining it with a silicone rubber foam layer, it is possible to impart properties such as cold resistance, elasticity, and flexibility to the laminated foam with the fluororubber foam layer, and also improve compression set. can.
次に、本発明の積層発泡体の製造方法について説明する
。Next, a method for manufacturing a laminated foam according to the present invention will be explained.
積層発泡体は、フッ素ゴム発泡体のスキン層の除去工程
；発泡性シリコーンゴム原料の適用工程：および加硫、
発泡工程を経ることにより、製造することができる。好
ましくは、前記加硫、発泡工程の後、アフターキュア工
程に供される。The laminated foam is produced by a process of removing the skin layer of the fluororubber foam; a process of applying the foamable silicone rubber raw material; and vulcanization.
It can be manufactured through a foaming process. Preferably, after the vulcanization and foaming steps, an after-cure step is performed.
スキン層除去工程において、発泡体の連続気泡又は独立
気泡が開口し、凹凸状の接合面が現われる。スキン層の
除去方法は特に制限はなく、例えば、カッターなどてス
キン層を切除してもよい。In the skin layer removal process, the open cells or closed cells of the foam are opened, and an uneven joint surface appears. The method for removing the skin layer is not particularly limited, and for example, the skin layer may be removed using a cutter or the like.
除去工程で得られたフッ素ゴム発泡体は、スライスして
、所定の厚みを有するフッ素ゴム発泡ントとしてもよい
。シート状、平板状、筒状、型枠状など、フッ素ゴム発
泡層の形状は用途により選択される。The fluororubber foam obtained in the removal step may be sliced into a fluororubber foam having a predetermined thickness. The shape of the fluororubber foam layer, such as sheet, flat, cylindrical, mold, etc., is selected depending on the application.
発泡性シリコーンゴム原料の適用工程では、スキン層除
去により現われた凹凸面に、液状の発泡性シリコーンゴ
ム原料を適用する。In the step of applying the foamable silicone rubber raw material, a liquid foamable silicone rubber raw material is applied to the uneven surface that appears by removing the skin layer.
本発明に用いられるシリコーンゴム原料は、接合面の微
小な凹凸部にまで侵入できる液状で、しかも加硫可能で
あればよい。発泡可能なシリコーンゴム原料としては、
例えば、下記（ａ） 、（ｂ）に属するゴム原料が挙げ
られる。The silicone rubber raw material used in the present invention only needs to be in a liquid state that can penetrate into minute irregularities on the joint surface and can be vulcanized. Foamable silicone rubber raw materials include:
For example, rubber raw materials belonging to the following (a) and (b) may be mentioned.
（ａ） １１０−３ｉ ミ基含有シロキサンとｔ（−３
ｉＥ基含有シロキサンと縮合反応型触媒とを含有する縮
合型ゴム原料
このタイプのシリコーンゴム原料は、ｌｏ−３ｉミ基含
有シロキサンとＨ−３ｉミ基含有シロキサンとが触媒の
存在下で、例えば室温て縮合反応し、反応により生成し
た水素ガスによって発泡する。縮合反応型触媒としては
、白金またはロジウム系触媒；アミン系触媒、スズの有
機酸塩等の有機金属触媒が用いられる。また、この縮合
型シリコーンゴム原料に、シリコーン系界面活性剤、フ
ッ素含有シリコーンオイルを添加すると、均一な低密度
発泡体が得られる。(a) 110-3i group-containing siloxane and t(-3
A condensation type rubber raw material containing an iE group-containing siloxane and a condensation reaction catalyst This type of silicone rubber raw material is produced by combining a lo-3i group-containing siloxane and a H-3i group-containing siloxane in the presence of a catalyst, for example at room temperature. A condensation reaction occurs, and the hydrogen gas generated by the reaction causes foaming. As the condensation reaction type catalyst, an organic metal catalyst such as a platinum or rhodium catalyst; an amine catalyst, or an organic acid salt of tin is used. Further, when a silicone surfactant and a fluorine-containing silicone oil are added to this condensed silicone rubber raw material, a uniform low-density foam can be obtained.
（ｂ）ビニル基、アリル基、（メタ）アクリロイル基な
どの不飽和基含有シロキサンと、ｌｌ−３ｉミ基含有シ
ロキサンおよびＨ−３ｉミ基含有シランの少なくとも１
種の成分と、１１０−３ｊミ基含有シラン、１１０−８
ｉ三基含有シロキサンおよび活性水素含有物の少なくと
も１種の成分と、白金またはロジウム系付加型触媒とを
含有する付加型ゴム原料このような付加型ゴム原料でも
、縮合反応により発生する水素ガスにより発泡させるこ
とができる。(b) a siloxane containing an unsaturated group such as a vinyl group, an allyl group, a (meth)acryloyl group, and at least one of a siloxane containing an ll-3i group and a silane containing an H-3i group;
Seed component, 110-3j Mi group-containing silane, 110-8
i Addition type rubber raw material containing at least one component of a trigroup-containing siloxane and an active hydrogen-containing substance, and a platinum or rhodium-based addition catalyst. Can be foamed.
なお、前記（ａ） 、（ｂ）のゴム原料を二種以上組合
せて使用してもよい。Note that two or more of the rubber raw materials (a) and (b) may be used in combination.
また、脱水素反応を伴なって発泡するゴム原料には、反
応速度および発泡速度を制御するために、さらに触媒抑
制剤を含有してもよい。Furthermore, the rubber raw material that foams with dehydrogenation reaction may further contain a catalyst inhibitor in order to control the reaction rate and foaming rate.
以上のようなゴム原料を適用する工程は、フッ素ゴム発
泡体を金型内あるいは型枠内に取り付けて行なうことか
好ましい。この場合、シリコーンゴム原料の発泡に際し
てフッ素ゴム発泡面とシリコーンゴム発泡面が加圧状態
となり、ゴム原料が接合面の凹凸部へ効率的に侵入する
ので、より強固にフッ素ゴム発泡体と接合できる。The step of applying the rubber raw material as described above is preferably carried out by attaching the fluororubber foam inside a mold or a formwork. In this case, when the silicone rubber raw material is foamed, the fluororubber foamed surface and the silicone rubber foamed surface are pressurized, and the rubber raw material efficiently penetrates into the uneven parts of the bonding surface, so it can be bonded more firmly to the fluororubber foam. .
シリコーンゴム原料は、ゴム原料の種類に応して、室温
ないし加熱下で発泡、加硫できる。シリコーンゴム原料
が発泡、加硫すると、アンカー効果等によってシリコー
ンゴム発泡層とフッ素ゴム発泡層とが強固に接合した積
層発泡体か得られるが、接着強度をさら高めるため、加
熱によりアフターキュアするアフターキュア工程に供し
、さらに架橋させ、硬化を完了させることが好ましい。Silicone rubber raw materials can be foamed and vulcanized at room temperature or under heat, depending on the type of rubber raw material. When the silicone rubber raw material is foamed and vulcanized, a laminated foam is obtained in which the silicone rubber foam layer and the fluororubber foam layer are firmly bonded together due to the anchor effect, etc. However, in order to further increase the adhesive strength, after-curing is performed by heating. It is preferable to subject the material to a curing step and further crosslink it to complete curing.
アフターキュアの方法は特に制限ないが、例えば、加熱
機などを用いて、一定時間加熱する方法が一般的である
。アフターキュアの温度は、例えば、１５０〜２２０℃
程度が好ましい。There are no particular restrictions on the after-cure method, but a common method is to heat it for a certain period of time using a heating machine, for example. After-cure temperature is, for example, 150 to 220°C.
degree is preferred.
以上のような積層発泡体の製造方法では、■液状のシリ
コーンゴム原料を用いているので、フッ素ゴム発泡体の
形状が複雑であっても、注入により、所望の形状の積層
発泡体を作製することができる。例えば、外的環境と接
触する部分だけにフッ素ゴム発泡層を用いれば、耐熱性
、耐薬品性に優れた特性を有する積層発泡体を得ること
かできる。また、■室温硬化型のシリコーンゴムを原料
を用いれば、室温にて短時間で容易に積層発泡体を得る
ことができる。また、アフターキュアを行うことにより
、シリコーンゴム発泡層とフッ素ゴム発泡層とを、さら
に強固に接合できる。さらに、■フッ素ゴム発泡体は非
常に高価な材料であるので、安価なシリコーンゴム発泡
体と積層することにより発泡体としての価格を安くする
ことができる。In the method for producing a laminated foam as described above, 1) Since a liquid silicone rubber raw material is used, even if the shape of the fluororubber foam is complex, a laminated foam of the desired shape can be produced by injection. be able to. For example, if a fluororubber foam layer is used only in the portion that comes into contact with the external environment, a laminated foam having excellent heat resistance and chemical resistance can be obtained. In addition, (2) If room temperature curing silicone rubber is used as a raw material, a laminated foam can be easily obtained at room temperature in a short time. Further, by performing after-curing, the silicone rubber foam layer and the fluororubber foam layer can be bonded more firmly. Furthermore, since fluororubber foam is a very expensive material, the price of the foam can be reduced by laminating it with inexpensive silicone rubber foam.
［発明の効果］
本発明の積層発泡体は、接合一体性が高く、厚みが大き
い。また本発明の積層発泡体は、耐寒性等の特性が付与
されている。[Effects of the Invention] The laminated foam of the present invention has high joint integrity and large thickness. Further, the laminated foam of the present invention is endowed with characteristics such as cold resistance.
本発明の積層発泡体の製造方法によれば、化学的に不活
性なフッ素ゴム発泡体に対してもシリコーンゴム発泡体
を強固に接合することができ、前記のように優れた特性
を有する積層発泡体を容易に得ることができる。According to the method for producing a laminated foam of the present invention, a silicone rubber foam can be firmly bonded even to a chemically inert fluororubber foam, and a laminated foam having excellent properties as described above can be bonded firmly. Foams can be easily obtained.
［実施例］
以下に、実施例に基づいて本発明をより詳細に説明する
。[Examples] The present invention will be described in more detail below based on Examples.
なお、フッ素ゴムの発泡体としては、独立気泡型の発泡
体であるタイガースポリマー株式会社製、商品名フッ素
ゴムスポンジシート（発泡倍率：４倍）ヲ用いた。この
フッ素ゴム発泡シートのスキン層を切除し、厚さ５ ｍ
ｍのシートを作製した。As the fluororubber foam, a closed-cell foam manufactured by Tigers Polymer Co., Ltd. under the trade name of fluororubber sponge sheet (expansion ratio: 4 times) was used. The skin layer of this fluororubber foam sheet was removed to a thickness of 5 m.
A sheet of m was prepared.
実施例１
発泡性液状シリコーンゴム原料（東芝シリコン株式会社
製、商品名トスフオーム５５００）を用いた。すなわち
同社の技術資料に従って、Ａ液１００重量部に対して、
Ｂ液３重量部の割合で混合して、発泡性液状シリコーン
原料を調製した。Example 1 A foamable liquid silicone rubber raw material (manufactured by Toshiba Silicon Corporation, trade name Tosfoam 5500) was used. In other words, according to the company's technical data, for 100 parts by weight of liquid A,
A foamable liquid silicone raw material was prepared by mixing 3 parts by weight of liquid B.
上記で作製した厚さ５ｍｍのフッ素ゴム発泡シートを、
横断面四角形の金属製の型枠の相対する二つの内面に取
り付けた。２つのシートの間隔は１０ ｍｍであった。The fluororubber foam sheet with a thickness of 5 mm prepared above was
It was attached to two opposing inner surfaces of a metal formwork with a rectangular cross section. The spacing between the two sheets was 10 mm.
フッ素ゴム発泡シートを取り付けた型枠内に、調製した
発泡性液状シリコーンゴムを流し込んだところ、シリコ
ーンゴム原料は、約１時間で発泡硬化した。When the prepared foamable liquid silicone rubber was poured into a mold fitted with a fluororubber foam sheet, the silicone rubber raw material foamed and hardened in about 1 hour.
積層発泡体を型枠から取り出して乾燥機に入れ、１６０
℃の温度で１時間、温度を１８０℃に上げて１時間、さ
らに温度を２００℃に上げて２時間アフターキュアを行
なうことにより硬化を完了し、第２図に示すようなサン
ドイッチ構造の積層発泡体を得た。シリコーンゴム発泡
層（１２）の厚さは約３０ ｍｍであり、発泡倍率は４
倍であった。得られた積層発泡体のシリコーンゴム発泡
層とフッ素ゴム発泡層とは、強固に接合しており、接合
面から発泡層を剥離しようとしたところ、ゴム破壊を生
じた。Remove the laminated foam from the formwork and put it in a dryer for 160 minutes.
℃ for 1 hour, then raised the temperature to 180℃ for 1 hour, and then raised the temperature to 200℃ for 2 hours to complete curing, resulting in a laminated foam with a sandwich structure as shown in Figure 2. I got a body. The thickness of the silicone rubber foam layer (12) is approximately 30 mm, and the foaming ratio is 4.
It was double that. The silicone rubber foam layer and the fluororubber foam layer of the obtained laminated foam were firmly bonded, and when an attempt was made to peel the foam layer from the bonded surface, the rubber broke.
この積層発泡体を３０％圧縮した状態で、１８０℃の温
度で４日間放置した。放置後の積層発泡体の圧縮永久歪
は、フッ素ゴム発泡体単体のそれと比べて、４０％改良
されていた。This laminated foam was left in a 30% compressed state at a temperature of 180° C. for 4 days. The compression set of the laminated foam after standing was improved by 40% compared to that of the fluororubber foam alone.
実施例２
発泡性液状シリコーンゴム原料として、信越化学社製、
商品名ＫＥ−５２１を用いる以外は実施例１と同様にし
て積層発泡体を得た。なお、このゴム原料は、同社の技
術資料に従って、Ａ液とＢ液とを、１：］ （重量比）
の割合で混合して発泡性液状シリコーンゴム原料を調製
した。また、注入したシリコーンゴム原料は約１０分間
で硬化した。Example 2 As raw materials for foamable liquid silicone rubber, products manufactured by Shin-Etsu Chemical Co., Ltd.
A laminated foam was obtained in the same manner as in Example 1 except that the product name KE-521 was used. In addition, this rubber raw material is made of liquid A and liquid B at 1:] (weight ratio) according to the company's technical data.
A foamable liquid silicone rubber raw material was prepared by mixing in the following ratio. Further, the injected silicone rubber raw material was cured in about 10 minutes.
得られた積層発泡体におけるシリコーンゴム発泡層の発
泡倍率は３倍であり、シリコーンゴム発泡層とフッ素ゴ
ム発泡層とは、強固に接合していた。The foaming ratio of the silicone rubber foam layer in the obtained laminated foam was 3 times, and the silicone rubber foam layer and the fluororubber foam layer were firmly bonded.
さらに、この積層発泡体について、実施例１と同様にし
て圧縮永久歪を測定したところ、この積層発泡体の圧縮
永久歪は、フッ素ゴム発泡体単体のそれと比べて、４２
％改良されていた。Furthermore, when the compression set of this laminated foam was measured in the same manner as in Example 1, the compression set of this laminated foam was 42% compared to that of the fluororubber foam alone.
% improved.
第１図は本発明の一例である積層発泡体の断面斜視図、
第２図は本発明の他の例である積層発泡体の断面斜視図
、第３図は本発明のさらに他の例である積層発泡体の断
面斜視図である。FIG. 1 is a cross-sectional perspective view of a laminated foam that is an example of the present invention;
FIG. 2 is a cross-sectional perspective view of a laminated foam according to another example of the present invention, and FIG. 3 is a cross-sectional perspective view of a laminated foam according to still another example of the present invention.
Claims (1)
されていることを特徴とする積層発泡体。 ２、フッ素ゴム発泡体のスキン層を除去し、接合面を形
成する工程； 該接合面に、発泡可能な液状シリコーンゴム原料を適用
する工程；および 該液状シリコーンゴム原料を加硫および発泡させる工程 を含む積層発泡体の製造方法。 ３、加硫および発泡させる工程の後、アフターキュア工
程に供する請求項２記載の積層発泡体の製造方法。[Scope of Claims] 1. A laminated foam, characterized in that a fluororubber foam layer and a silicone rubber foam layer are laminated. 2. Removing the skin layer of the fluororubber foam to form a bonding surface; Applying a foamable liquid silicone rubber raw material to the bonding surface; and Vulcanizing and foaming the liquid silicone rubber raw material. A method for producing a laminated foam comprising: 3. The method for producing a laminated foam according to claim 2, wherein after the vulcanization and foaming steps, an after-cure step is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2179973A JP2520386B2 (en) | 1990-07-06 | 1990-07-06 | Laminated foam and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2179973A JP2520386B2 (en) | 1990-07-06 | 1990-07-06 | Laminated foam and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0465236A true JPH0465236A (en) | 1992-03-02 |
| JP2520386B2 JP2520386B2 (en) | 1996-07-31 |
Family
ID=16075221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2179973A Expired - Fee Related JP2520386B2 (en) | 1990-07-06 | 1990-07-06 | Laminated foam and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520386B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008189798A (en) * | 2007-02-05 | 2008-08-21 | Iwaki Kasei Kk | Porous molded resin and method for producing the same |
| JP2014069521A (en) * | 2012-09-28 | 2014-04-21 | Dainippon Printing Co Ltd | Foamed laminated sheet, laminated sheet, and manufacturing method of these |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5742031A (en) * | 1980-08-28 | 1982-03-09 | Canon Inc | Electric shutter camera |
| JPS583238U (en) * | 1981-07-01 | 1983-01-10 | 住友ゴム工業株式会社 | Low friction porous joint material |
-
1990
- 1990-07-06 JP JP2179973A patent/JP2520386B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5742031A (en) * | 1980-08-28 | 1982-03-09 | Canon Inc | Electric shutter camera |
| JPS583238U (en) * | 1981-07-01 | 1983-01-10 | 住友ゴム工業株式会社 | Low friction porous joint material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008189798A (en) * | 2007-02-05 | 2008-08-21 | Iwaki Kasei Kk | Porous molded resin and method for producing the same |
| JP2014069521A (en) * | 2012-09-28 | 2014-04-21 | Dainippon Printing Co Ltd | Foamed laminated sheet, laminated sheet, and manufacturing method of these |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2520386B2 (en) | 1996-07-31 |
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