JPH0445548B2 - - Google Patents
Info
- Publication number
- JPH0445548B2 JPH0445548B2 JP62097685A JP9768587A JPH0445548B2 JP H0445548 B2 JPH0445548 B2 JP H0445548B2 JP 62097685 A JP62097685 A JP 62097685A JP 9768587 A JP9768587 A JP 9768587A JP H0445548 B2 JPH0445548 B2 JP H0445548B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber layer
- foamed
- foamed rubber
- foaming
- foamable
- 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.)
- Expired - Lifetime
Links
- 229920001971 elastomer Polymers 0.000 claims description 110
- 239000005060 rubber Substances 0.000 claims description 110
- 239000000463 material Substances 0.000 claims description 47
- 238000005187 foaming Methods 0.000 claims description 29
- 239000002131 composite material Substances 0.000 claims description 25
- 239000006260 foam Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 description 14
- 239000004033 plastic Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000470 constituent Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920003051 synthetic elastomer Polymers 0.000 description 3
- 239000005061 synthetic rubber Substances 0.000 description 3
- -1 tackifiers Substances 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000010058 rubber compounding Methods 0.000 description 2
- 239000007965 rubber solvent Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 235000014692 zinc oxide Nutrition 0.000 description 2
- UOYIYWCAYFTQLH-UHFFFAOYSA-N 3,7-dinitro-1,3,5,7-tetrazabicyclo[3.3.1]nonane Chemical compound C1N2CN([N+](=O)[O-])CN1CN([N+]([O-])=O)C2 UOYIYWCAYFTQLH-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- KINULKKPVJYRON-PVNXHVEDSA-N n-[(e)-[10-[(e)-(4,5-dihydro-1h-imidazol-2-ylhydrazinylidene)methyl]anthracen-9-yl]methylideneamino]-4,5-dihydro-1h-imidazol-2-amine;hydron;dichloride Chemical compound Cl.Cl.N1CCN=C1N\N=C\C(C1=CC=CC=C11)=C(C=CC=C2)C2=C1\C=N\NC1=NCCN1 KINULKKPVJYRON-PVNXHVEDSA-N 0.000 description 1
- 150000002832 nitroso derivatives Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002987 primer (paints) Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Gasket Seals (AREA)
- Sealing Material Composition (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、シール性の良好なガスケツトを得
るための複合ガスケツト材料およびその製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a composite gasket material for obtaining a gasket with good sealing properties and a method for manufacturing the same.
（従来の技術）
従来、シール性の良好なガスケツトの素材とし
て、不浸透性材料から成る基材シートの両面にプ
ラスチツクあるいはゴムの弾性発泡体を接着して
形成した複合ガスケツト材料が提案されている。(Prior Art) Composite gasket materials have been proposed as gasket materials with good sealing properties, which are made by bonding plastic or rubber elastic foam to both sides of a base sheet made of an impermeable material. .
すなわち、特開昭54−72282号公報には、伸縮
性の少ない不浸透性基材シートの両面に独立気泡
を持つた発泡体層を形成させた複合ガスケツト材
料が開示されている。しかしながら、該ガスケツ
ト材料は、不浸透性という緻密な組織を有する基
材シート上に発泡体を形成したものであり、不浸
透性材料と発泡体という著しく物性の異なる材料
が直接複合されているものであるから、両者の結
合強度は非常に小さく、そのため、このガスケツ
ト材料から所望形状のガスケツトを切断する工程
で、両者が剥離したり、剥離しないまでもシール
性が低下するなど、生産性、性能、経済性等にお
いて重大な欠点がある。またこの公報には、上記
複合ガスケツト材料の製造方法として、アクリル
エマルジヨン又はラテツクスの単独あるいは両者
を併用したポリマー成分に、各種配合剤を添加し
空気の存在下で高速攪拌してウエツトフオームに
含泡させ、該ウエツトフオームをポリエステル樹
脂シート、ポリアミド樹脂シート、ポリウレタン
樹脂シート、ポリアクリル樹脂シートおよび紙か
ら選ばれた不浸透性基材シート上に塗布し、しか
る後加熱してウエツトフオームのゲル化、次いで
架橋反応を行わしめる方法が開示されている。し
かしながら、アクリルエマルジヨンやラテツクス
を空気の存在下で高速攪拌して含泡させ、次いで
ゲル化および架橋反応を行わしめることにより形
成した発泡体は、独立気泡の割合が約30％以下と
低く、また気泡が不揃いかつ粗大であり、そのた
めガスケツトとしての使用時に発泡体における実
体漏れが生じ易く、シール性が低い。また緻密な
組織を有する材料とエマルジヨンやラテツクスか
ら成るウエツトフオームとを実用強度を有する程
度にまで接着することは非常に困難であり、特に
金属シートと複合させる場合にこの方法は不可能
である。 That is, JP-A-54-72282 discloses a composite gasket material in which foam layers having closed cells are formed on both sides of an impermeable base sheet with little elasticity. However, the gasket material is a foam formed on a base sheet with a dense impermeable structure, and is a direct composite of an impermeable material and a foam, which are materials with significantly different physical properties. Therefore, the bonding strength between the two is extremely low, and as a result, in the process of cutting a gasket of the desired shape from this gasket material, the two may peel off, or even if they do not separate, the sealing performance may deteriorate, resulting in problems in productivity and performance. However, there are serious drawbacks in terms of economy, etc. This publication also describes a method for manufacturing the above-mentioned composite gasket material, in which various compounding agents are added to a polymer component of acrylic emulsion or latex alone or in combination, and the mixture is stirred at high speed in the presence of air to form a wet foam. The wet foam is applied onto an impermeable base sheet selected from a polyester resin sheet, a polyamide resin sheet, a polyurethane resin sheet, a polyacrylic resin sheet, and paper, and then heated to gel the wet foam and then crosslink it. A method of carrying out the reaction is disclosed. However, foams formed by stirring acrylic emulsion or latex at high speed in the presence of air to form foams, and then performing gelation and crosslinking reactions have a low proportion of closed cells of about 30% or less. In addition, the bubbles are irregular and coarse, and therefore, when used as a gasket, the foam tends to leak, resulting in poor sealing performance. Furthermore, it is extremely difficult to bond a material with a dense structure to a wet foam made of emulsion or latex to the extent that it has practical strength, and this method is especially impossible when composited with a metal sheet.
また特開昭52−38579号公報には、金属シート
に発泡性プラスチツクの粉体塗装や、発泡性プラ
スチツクシートの熱融着若しくは接着剤接着によ
る手段を使用して発泡性プラスチツク層を重ね、
しかる後に加熱して該発泡性プラスチツク層を発
泡させるという、金属シートと発泡プラスチツク
の複合材の製造方法が開示されているが、かかる
手段で発泡性プラスチツク層を重ねたときには、
金属シートと発泡性プラスチツク層の界面およ
び／あるいは近傍における空気の存在を完全に排
除することが不可能である。そのため発泡性プラ
スチツク層の発泡加熱をすると、両者の界面およ
び／あるいは近傍に存在する空気が大きく膨張す
るので界面および／あるいは発泡プラスチツク層
内に大きな気泡の空洞が発生し、その結果金属シ
ートと発泡プラスチツク層の接着強度が低下し、
また発泡プラスチツクの気泡の大きさのバラツキ
が大きく、独立気泡が減少し、表面平滑性が低下
する当の欠点が生じる。またここに開示された製
造方法においては、金属シートと発泡性プラスチ
ツクとを上記の如く直接に複合したものであるか
ら、金属シートと発泡性プラスチツクの接着強度
が低く、かつこの界面に空気が存在することと相
俟つて、発泡性プラスチツクの発泡時の加熱の作
用および発泡力によつて両者が部分的に剥離する
等の欠陥が生じる。 Furthermore, Japanese Patent Application Laid-Open No. 52-38579 discloses that a foamable plastic layer is layered on a metal sheet using means such as powder coating of foamable plastic, thermal fusion of foamable plastic sheets, or adhesive bonding.
A method of manufacturing a composite material of a metal sheet and a foamed plastic is disclosed in which the foamable plastic layer is then foamed by heating.
It is not possible to completely eliminate the presence of air at and/or in the vicinity of the interface between the metal sheet and the foamed plastic layer. Therefore, when the foamable plastic layer is foamed and heated, the air existing at the interface and/or the vicinity of the two expands significantly, creating large air bubble cavities at the interface and/or within the foamed plastic layer.As a result, the metal sheet and the foam The adhesive strength of the plastic layer decreases,
Furthermore, the size of the cells in the foamed plastic varies widely, resulting in a decrease in closed cells and a reduction in surface smoothness. Furthermore, in the manufacturing method disclosed herein, since the metal sheet and the foamed plastic are directly composited as described above, the adhesive strength between the metal sheet and the foamed plastic is low, and air is present at this interface. Coupled with this, defects such as partial peeling of the foamable plastic occur due to the heating action and foaming force during foaming of the foamable plastic.
（発明が解決しようとする問題点）
この発明は、前述した従来の複合ガスケツト材
料におけるすべての欠点を解消し、極めて優れた
性能を有し、かつ品質上の信頼性が高く、しかも
生産性、経済性にすぐれた複合ガスケツト材料お
よびその製造方法を提供することを目的とするも
のである。(Problems to be Solved by the Invention) The present invention eliminates all the drawbacks of the conventional composite gasket materials mentioned above, has extremely excellent performance, is highly reliable in terms of quality, and has low productivity and The object of the present invention is to provide an economical composite gasket material and a method for manufacturing the same.
（問題点を解決するための手段）
本発明者らは、金属製基材シートの両面に非発
泡性ゴム溶液を塗布し、乾燥、加硫させた非発泡
ゴム層と、さらにその表面に発泡性ゴム溶液を塗
布、乾燥して、発泡性ゴム層を形成し、しかる後
加熱により発泡性ゴム層の発泡および加硫を行つ
た発泡ゴム層とを形成することにより、金属製基
材シートと発泡ゴム層が非発泡ゴム層を介してゴ
ム層の自己接着作用により３者を一体構造に結合
形成した複合ガスケツト材料が合目的であること
を知見し、その知見に基づいてこの発明を完成し
たものである。(Means for solving the problem) The present inventors applied a non-foaming rubber solution to both sides of a metal base sheet, dried and vulcanized the non-foamed rubber layer, and further developed a non-foamed rubber layer on the surface of the non-foamed rubber solution. A foamable rubber solution is applied and dried to form a foamable rubber layer, and then heated to foam and vulcanize the foamable rubber layer. It was discovered that a composite gasket material in which a foamed rubber layer is formed through a non-foamed rubber layer and a self-adhesive action of the rubber layer combines the three into an integral structure is suitable, and based on that knowledge, the present invention was completed. It is something.
すなわちこの発明の複合ガスケツト材料は、金
属製基材シートの両面それぞれに、非発泡ゴム層
を介して発泡ゴム層が各ゴム層の自己接着作用に
より接合形成されていることを特徴とし、またこ
の発明の複合ガスケツト材料の製造方法は、金属
製基材シートの両面に、非発泡性ゴム溶液を塗布
し、しかる後乾燥、加硫させて非発泡ゴム層を形
成し、次いで該非発泡ゴム層表面に発泡性ゴム溶
液を塗布し、これを乾燥して発泡性ゴム層を形成
し、しかる後加熱して発泡性ゴム層の発泡および
加硫を行わしめて、発泡ゴム層を形成することを
特徴とするものである。 That is, the composite gasket material of the present invention is characterized in that foamed rubber layers are bonded to both surfaces of a metal base sheet via a non-foamed rubber layer by the self-adhesive action of each rubber layer. The method for manufacturing a composite gasket material of the invention includes applying a non-foaming rubber solution to both sides of a metal base sheet, followed by drying and vulcanization to form a non-foamed rubber layer, and then applying a non-foamed rubber solution to the surface of the non-foamed rubber layer. A foamed rubber solution is applied to the foamed rubber solution, dried to form a foamed rubber layer, and then heated to foam and vulcanize the foamed rubber layer to form a foamed rubber layer. It is something to do.
次にこの発明の複合ガスケツト材料を、その実
施の態様を示す添付図面に基づいて詳細に説明す
る。 Next, the composite gasket material of the present invention will be explained in detail based on the accompanying drawings showing embodiments thereof.
第１図はこの発明の実施の態様を示す複合ガス
ケツト材料の断面図である。 FIG. 1 is a sectional view of a composite gasket material showing an embodiment of the present invention.
図面において、１は複合ガスケツト材料であ
り、金属製の基材シート２の両面に、発泡ゴム層
３が非発泡ゴム層４を介し、各ゴム層３，４の自
己接着作用を利用して、換言すれば別の接着剤を
使用せずに、３者が一体構造に接合されている。 In the drawings, reference numeral 1 indicates a composite gasket material, in which a foamed rubber layer 3 is placed on both sides of a metal base sheet 2 via a non-foamed rubber layer 4, using the self-adhesive action of each rubber layer 3, 4. In other words, the three parts are joined into an integral structure without using a separate adhesive.
この発明に使用する基材シート２は、実態漏れ
がなく、加工性に優れ、発泡ゴム層３を補強でき
る金属シートであり、また非発泡ゴム層４との接
着性に優れたものが好適である。好適な具体例と
して軟鋼板、ステンレス鋼板、アルミニウム板な
どの金属シートを挙げることができる。 The base sheet 2 used in this invention is preferably a metal sheet that has no leakage, has excellent processability, can reinforce the foamed rubber layer 3, and has excellent adhesiveness to the non-foamed rubber layer 4. be. Preferred specific examples include metal sheets such as mild steel plates, stainless steel plates, and aluminum plates.
この発明における基材シート２上に形成される
非発泡ゴム層４の材料には、天然ゴム、合成ゴム
又は熱可塑性エラストマー等から目的に応じて選
択され、また非発泡ゴム層４の厚さは2μm以上、
特に10μm以上が好ましい。その厚さの上限は臨
界的ではなく、目的に応じて選択されるが一般に
は後記の発泡ゴム層３の厚さとほぼ等しくされ
る。この発明方法に使用する非発泡性ゴム溶液は
天然ゴム、合成ゴム、熱可塑性エラストマー等の
上記ゴム材料のうち単独又は２種以上を併用し
て、これに加硫剤（架橋剤）、加硫促進剤（架橋
促進剤）、遅延剤、補強剤、老化防止剤、軟化剤、
粘着性付与剤、難燃剤、充填剤、着色剤など公知
なゴム配合剤を目的に応じて種類と配合量を適宜
選択して配合し、さらにゴム溶剤を配合した液状
組成物である。 The material of the non-foamed rubber layer 4 formed on the base sheet 2 in this invention is selected from natural rubber, synthetic rubber, thermoplastic elastomer, etc. depending on the purpose, and the thickness of the non-foamed rubber layer 4 is 2 μm or more,
Particularly preferred is 10 μm or more. The upper limit of the thickness is not critical and is selected depending on the purpose, but is generally made approximately equal to the thickness of the foamed rubber layer 3 described later. The non-foaming rubber solution used in the method of this invention is made by using one or more of the above-mentioned rubber materials such as natural rubber, synthetic rubber, and thermoplastic elastomer, and adding a vulcanizing agent (crosslinking agent) and a vulcanizing agent. Accelerator (crosslinking accelerator), retarder, reinforcing agent, anti-aging agent, softener,
It is a liquid composition in which known rubber compounding agents such as tackifiers, flame retardants, fillers, and colorants are blended by appropriately selecting the type and blending amount depending on the purpose, and a rubber solvent is further blended.
この発明における発泡ゴム層３は、天然ゴム、
合成ゴム又は熱可塑性エラストマー等の発泡層で
あり、発泡ゴム層３の密度および厚さは、目的に
応じて適宜選択されるものであるが、一般には密
度は10〜800Kg／m3、厚さは0.05〜２mmである。
またこの発明方法に使用する発泡性ゴム溶液は、
上記各種ゴム材料から目的に応じて単独又は２種
以上を併用して選択したゴム材料に、前記非発泡
性ゴム溶液と同様に公知のゴム配合剤およびゴム
溶剤を配合し、さらに加熱分解型発泡剤および必
要に応じて尿素、有機酸（塩）等の発泡助剤を配
合して成る液状組成物である。上記加熱分解型発
泡剤としてジニトロペンタメチレンテトラミン等
のニトロソ化合物、アゾジカルボンアミド等のア
ゾ化合物、オキシビスベンゼンスルホニルヒドラ
ジツド等のスルホニルヒドラジツド化合物などが
挙げられる。なお前記非発泡性ゴム溶液および上
記発泡性ゴム溶液にはEVAやフエノール樹脂前
駆体などの高分子化合物あるいはその前駆体を適
宜配合してもよい。 The foamed rubber layer 3 in this invention is made of natural rubber,
It is a foamed layer made of synthetic rubber or thermoplastic elastomer, etc., and the density and thickness of the foamed rubber layer 3 are selected appropriately depending on the purpose, but generally the density is 10 to 800 Kg/m 3 and the thickness is is 0.05 to 2 mm.
The foamable rubber solution used in the method of this invention is
Rubber materials selected from the above various rubber materials either singly or in combination of two or more depending on the purpose are blended with known rubber compounding agents and rubber solvents in the same way as the non-foaming rubber solution, and further heat-decomposed foaming is achieved. It is a liquid composition comprising a foaming agent and, if necessary, a foaming aid such as urea or an organic acid (salt). Examples of the thermally decomposable blowing agent include nitroso compounds such as dinitropentamethylenetetramine, azo compounds such as azodicarbonamide, and sulfonyl hydrazide compounds such as oxybisbenzenesulfonyl hydrazide. Note that a polymer compound such as EVA or a phenol resin precursor or a precursor thereof may be appropriately blended into the non-foamable rubber solution and the foamable rubber solution.
この発明の製造方法は、まず金属製基材シート
２を表面洗浄して使用するが、必要に応じエツチ
ング、サンデング、プライマー塗布などの表面処
理を施して接着性を向上させることは好ましい。
しかる後、基材シート２の表面に非発泡性ゴム溶
液を塗布し、次いで乾燥し、さらに加熱し加硫を
行つて、基材シート２上直接に自己接着作用によ
り非発泡ゴム層４を形成する。この場合、加硫度
は、次の発泡性ゴム溶液の塗布をした場合に膨潤
などにより非発泡ゴム層４が金属製基材シート２
より剥離しない程度以上に進行させればよい。こ
れは実験的に容易に決定することができ、またそ
の程度は発泡ゴム層３との間の自己接着作用の大
きさに関連する。 In the manufacturing method of the present invention, the surface of the metal base sheet 2 is first cleaned before use, but it is preferable to perform surface treatments such as etching, sanding, and primer coating as necessary to improve adhesion.
After that, a non-foaming rubber solution is applied to the surface of the base sheet 2, then dried, and further heated and vulcanized to form a non-foam rubber layer 4 directly on the base sheet 2 by self-adhesion. do. In this case, the degree of vulcanization is such that when the next foaming rubber solution is applied, the non-foaming rubber layer 4 is caused by swelling on the metal base sheet 2.
It is sufficient if the progress is made to a degree that does not cause peeling. This can be easily determined experimentally and its extent is related to the magnitude of the self-adhesive effect between it and the foamed rubber layer 3.
さらに、本発明における発泡ゴム層３は、上記
非発泡ゴム層４の表面に発泡性ゴム溶液を塗布
し、乾燥して発泡性ゴム層を形成し、次いで加熱
して、発泡および加硫を行わしめることにより基
材シート２の両面に非発泡ゴム層４を介した発泡
ゴム層３が一体構造に接着形成されて、複合ガス
ケツト材料１が得られる。 Furthermore, the foamed rubber layer 3 in the present invention is formed by applying a foaming rubber solution to the surface of the non-foaming rubber layer 4, drying it to form a foaming rubber layer, and then heating it to foam and vulcanize it. By tightening, the foamed rubber layer 3 is integrally bonded to both surfaces of the base sheet 2 via the non-foamed rubber layer 4, and the composite gasket material 1 is obtained.
（作用）
この発明においては、金属製基材シートの両面
に非発泡性ゴム溶液を塗布し、乾燥、加硫して非
発泡ゴム層を形成し、さらにその表面に発泡性ゴ
ム溶液を塗布して発泡性ゴム層を形成し、次いで
加熱して発泡性ゴム層を発泡、加硫させるもので
あるから、基材シートと非発泡ゴム層と発泡ゴム
層の接合部には空気の混入などによるボイドの存
在など各構成材料の接着強度に悪影響を及ぼす異
物の存在は完全に排除され、かつ発泡ゴム層は、
これと性質が著しく異なる基材シートではなく、
ほぼ同質の非発泡ゴム層と接着形成された発泡性
ゴム層を発泡させて形成するので、発泡性ゴム層
の発泡時に、接合部に空気の存在や剥離などによ
るボイドの存在が完全に排除され、かつまた非発
泡ゴム層に接着した発泡性ゴム層が発泡するの
で、生成した発泡ゴム層の接合部に発泡時の応力
が残留することがないなどにより、各構成材料の
接着は完璧である。このため、二次加工時や実用
時の物理的、機械的および化学的作用によつて各
構成材料が剥離するなどの実用上有害な現象の発
生を完全に防止できる。かつまた、この発明によ
れば、発泡ゴム層は、非発泡ゴム層上に溶液から
その自己接着作用により一体的に形成した発泡性
ゴム層を加熱分解型発泡剤を使用して発泡形成さ
せるものであるから、微細で均一性に富む気泡が
形成され、かつその気泡のほぼ全数が独立気泡構
造であり、また表面平滑性に優れ、かつ前述した
ように各構成材料の接着は完璧であり、そのため
ガスケツトからの実体漏れ等シート材としてその
機能が消失するような現象の発生は完全に排除さ
れ、低締付圧で高度のシート性を発揮するなどガ
スケツト材料として卓越した性能を有する。(Function) In this invention, a non-foaming rubber solution is applied to both sides of a metal base sheet, dried and vulcanized to form a non-foaming rubber layer, and a foaming rubber solution is further applied to the surface of the non-foaming rubber layer. Since the foamed rubber layer is formed by heating and then heated to foam and vulcanize the foamed rubber layer, there is a possibility that air may enter the joint between the base sheet, the non-foamed rubber layer, and the foamed rubber layer. The presence of foreign substances such as voids that adversely affect the adhesive strength of each component material is completely eliminated, and the foamed rubber layer is
Rather than a base sheet with significantly different properties,
Since it is formed by foaming a non-foamed rubber layer of almost the same quality and a foamed rubber layer that is adhesively formed, the presence of air in the joint and the presence of voids due to peeling are completely eliminated when the foamed rubber layer is foamed. , and since the foamed rubber layer adhered to the non-foamed rubber layer foams, there is no residual stress from foaming at the joints of the foamed rubber layers, so the adhesion of each constituent material is perfect. . Therefore, it is possible to completely prevent the occurrence of practically harmful phenomena such as peeling of constituent materials due to physical, mechanical, and chemical effects during secondary processing or practical use. Furthermore, according to the present invention, the foamed rubber layer is formed by foaming a foamable rubber layer that is integrally formed from a solution on the non-foamed rubber layer by its self-adhesive action using a thermally decomposable foaming agent. Therefore, fine and highly uniform cells are formed, almost all of the cells have a closed cell structure, and the surface smoothness is excellent, and as mentioned above, the adhesion of each constituent material is perfect. Therefore, phenomena such as substance leakage from the gasket that would cause the sheet material to lose its function are completely eliminated, and it has excellent performance as a gasket material, such as exhibiting high sheeting properties with low tightening pressure.
（実施例）
次に実施例において、この発明をさらに具体的
に説明する。(Example) Next, the present invention will be described in more detail in Examples.
実施例 １
表面洗浄した厚さ0.25mmの鋼板の両面に、下記
に示す非発泡性ゴム溶液を塗布し、160℃、２分
間加熱して非発泡ゴム層（厚さ10〜20μm）を形
成した。次いでこの非発泡ゴム層の表面に下記配
合の発泡性ゴム溶液を塗布し、これを乾燥して非
発泡ゴム層と一体的に接着した発泡性ゴム層（厚
さ0.3mm）を形成させた後、100℃で10分間、さら
に160℃で20分間加熱して、厚さ0.8mmの微細気泡
で構成された表面の平滑な発泡ゴム層を有する３
者が完全一体に接着した複合ガスケツト材料を得
た。Example 1 A non-foaming rubber solution shown below was applied to both surfaces of a surface-cleaned steel plate with a thickness of 0.25 mm and heated at 160°C for 2 minutes to form a non-foaming rubber layer (thickness 10 to 20 μm). . Next, a foaming rubber solution with the following composition was applied to the surface of this non-foamed rubber layer, and this was dried to form a foamed rubber layer (thickness: 0.3 mm) that was integrally bonded to the non-foamed rubber layer. , heated at 100℃ for 10 minutes and then at 160℃ for 20 minutes to form a foamed rubber layer with a smooth surface composed of microbubbles with a thickness of 0.8mm.
A composite gasket material completely bonded together was obtained.
このものから33×53φ（mm）および81×99φ（mm）
に打ち抜いた複合ガスケツトを製作し、５Kgｆ／
cm2の圧力で締め付け、窒素ガスで５Kgｆ／cm2を負
荷してシール実験を行つた。その結果、いずれの
供試体も漏れが認められなかつた。 From this one 33×53φ (mm) and 81×99φ (mm)
Manufactured a composite gasket punched to 5Kgf/
A sealing experiment was conducted by tightening with a pressure of cm 2 and applying a nitrogen gas load of 5 kgf/cm 2 . As a result, no leakage was observed in any of the specimens.
なお、ここに使用したゴム溶液の配合は次の通
りである。 The composition of the rubber solution used here is as follows.
非発泡性ゴム溶液（単位PHR）
NBR 100
亜鉛華 ５
ステアリン酸 １
カーボンブラツク 80
軟質炭酸カルシウム 30
粘着付与剤 40
加硫促進剤 ３
硫黄 ２
MEK 1343
発泡性ゴム溶液（単位PHR）
NBR 100
亜鉛華 ５
ステアリン酸 １
カーボンブラツク 80
軟質炭酸カルシウム 30
粘着付与剤 15
老化防止剤 ５
安定剤 １
加硫促進剤 ３
硫黄 1.5
発泡剤（ADCA系） ６
MEK 372
実施例 ２
実施例１と同様に非発泡ゴム層を形成し、その
表面に実施例１で使用した発泡性ゴム溶液を塗布
し、乾燥して発泡性ゴム層（厚さ0.1mm）を得た。
次いで160℃で20分間加熱して、厚さ0.17mmの微
細な気泡より成る平滑な表面を有する発泡ゴム層
を有する、鋼板と非発泡ゴム層と発泡ゴム層とが
一体的に接着した複合ガスケツト材料を得た。Non-foaming rubber solution (Unit: PHR) NBR 100 Zinc white 5 Stearic acid 1 Carbon black 80 Soft calcium carbonate 30 Tackifier 40 Vulcanization accelerator 3 Sulfur 2 MEK 1343 Foaming rubber solution (Unit: PHR) NBR 100 Zinc white 5 Stearic acid 1 Carbon black 80 Soft calcium carbonate 30 Tackifier 15 Anti-aging agent 5 Stabilizer 1 Vulcanization accelerator 3 Sulfur 1.5 Foaming agent (ADCA type) 6 MEK 372 Example 2 Non-foamed rubber layer as in Example 1 was formed, and the foamable rubber solution used in Example 1 was applied to the surface thereof, and dried to obtain a foamable rubber layer (thickness: 0.1 mm).
Then, it was heated at 160°C for 20 minutes to produce a composite gasket in which the steel plate, non-foamed rubber layer, and foamed rubber layer were integrally bonded, and had a foamed rubber layer with a smooth surface made of fine air bubbles with a thickness of 0.17mm. I got the material.
このもののシール試験を実施例１と同様の方法
で行つた。この結果、漏れは認められず、優れた
シール性が確認された。 A seal test of this product was conducted in the same manner as in Example 1. As a result, no leakage was observed, and excellent sealing performance was confirmed.
実施例 ３
表面化成処理した厚さ0.25mm鋼板の両面に実施
例１と同様の方法で非発泡ゴム層（厚さ40〜
50μm）を形成し、次に実施例１で使用した発泡
性ゴム溶液をその表面に塗布し、乾燥して発泡性
ゴム層（厚さ0.2mm）を形成し、次いで140℃で５
分間、160℃で10分間加熱して、微細な気泡より
成る平滑な表面を有する厚さ0.5mmの発泡ゴム層
を有し、各構成材料が一体的に結合した複合ガス
ケツトを得た。Example 3 A non-foamed rubber layer (thickness 40~
50 μm), then the foamable rubber solution used in Example 1 was applied to its surface, dried to form a foamable rubber layer (thickness 0.2mm), and then heated at 140°C for 50 minutes.
The gasket was heated at 160° C. for 10 minutes to obtain a composite gasket having a foamed rubber layer with a thickness of 0.5 mm and a smooth surface made of fine air bubbles, in which each constituent material was integrally bonded.
このものを実施例１と同様の方法でシール試験
を行つた結果、漏れは認められなかつた。 A sealing test was performed on this product in the same manner as in Example 1, and no leakage was observed.
（発明の効果）
以上に述べたように、この発明による複合ガス
ケツト材料は、金属製基材シートに発泡ゴム層が
非発泡ゴム層を介して一体的に接着形成されてい
るので、これがガスケツトとしての二次加工時や
実際に使用された際などにおける各種の作用を受
けても各構成材料が剥離するような実用上有害な
現象の発生は皆無で、各構成材料の接着は完璧で
ある。また、この発明方法によれば、基材シート
の表面にゴム溶液を用いて非発泡ゴム層を形成
し、次いで非発泡ゴム層と同様に溶液から発泡性
ゴム層を形成し、これを加熱発泡させるものであ
るから、各材料の接合部には接着性を低下させる
ボイド等の存在が完全に排除され、かつ諸性質が
比較的類似の非発泡ゴム層に接着した状態で両者
の接着部に異常な応力が発生することなくスムー
ズに発泡性ゴム層が発泡し、また上記の如くボイ
ド等が存在しないので各構成材料との接合部およ
び／あるいは内部にボイド等の接着性に有害な異
物が排除されて接着が極めて優秀であり、かつ均
一で微細な気泡を有する表面の平滑性の優れた発
泡ゴム層が形成するので、これをガスケツトとし
て使用した際に低締付圧でも高度なシールが得ら
れるなど極めて優れた性能を有し、かつ信頼性の
高い複合ガスケツト材料が得られる。加えて、こ
の発明は、極めて容易に入手できる材料を使用し
て極めて容易に実施できるなど、経済性、生産性
に優れ、産業上の利用価値は極めて大である。(Effects of the Invention) As described above, the composite gasket material according to the present invention has a foamed rubber layer integrally bonded to a metal base sheet via a non-foamed rubber layer, so this can be used as a gasket. Even when exposed to various effects during secondary processing or during actual use, there is no practically harmful phenomenon such as peeling of each constituent material, and the adhesion of each constituent material is perfect. Further, according to the method of the present invention, a non-foamed rubber layer is formed on the surface of the base sheet using a rubber solution, and then a foamable rubber layer is formed from the solution in the same way as the non-foamed rubber layer, and this is heated and foamed. Therefore, the presence of voids that reduce adhesion is completely eliminated in the joints of each material, and the bonded parts of both materials are bonded to a non-foamed rubber layer with relatively similar properties. The foamable rubber layer foams smoothly without abnormal stress, and as mentioned above, there are no voids, etc., so there are no foreign substances harmful to adhesion such as voids in the joints with each component material and/or inside. A foamed rubber layer with excellent adhesion and smooth surface with uniform, fine bubbles is formed, so when used as a gasket, it provides a high degree of sealing even at low tightening pressure. A composite gasket material with extremely excellent performance and high reliability can be obtained. In addition, the present invention has excellent economic efficiency and productivity, such as being extremely easy to implement using extremely easily available materials, and has extremely high industrial utility value.
第１図はこの発明の実施の態様を示す複合ガス
ケツト材料の断面図である。
１……複合ガスケツト材料、２……基材シー
ト、３……発泡ゴム層、４……非発泡ゴム層。
FIG. 1 is a sectional view of a composite gasket material showing an embodiment of the present invention. 1... Composite gasket material, 2... Base sheet, 3... Foamed rubber layer, 4... Non-foamed rubber layer.
Claims (1)
ゴム層を介して発泡ゴム層が各ゴム層の自己接着
作用により接合形成されていることを特徴とする
複合ガスケツト材料。 ２ 金属製基材シートの両面に、非発泡性ゴム溶
液を塗布し、しかる後乾燥、加硫させて非発泡ゴ
ム層を形成し、次いで該非発泡ゴム層表面に発泡
性ゴム溶液を塗布し、これを乾燥して発泡性ゴム
層を形成し、しかる後加熱して発泡性ゴム層の発
泡および加硫を行わしめて、発泡ゴム層を形成す
ることを特徴とする複合ガスケツト材料の製造方
法。[Scope of Claims] 1. A composite gasket material characterized in that foamed rubber layers are bonded to both surfaces of a metal base sheet via a non-foamed rubber layer by the self-adhesive action of each rubber layer. 2. Applying a non-foaming rubber solution to both sides of a metal base sheet, then drying and vulcanizing to form a non-foaming rubber layer, then applying a foamable rubber solution to the surface of the non-foaming rubber layer, A method for producing a composite gasket material, which comprises drying the material to form a foamable rubber layer, and then heating the material to foam and vulcanize the foamable rubber layer to form a foamed rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9768587A JPS63264691A (en) | 1987-04-21 | 1987-04-21 | Composite gasket material and production of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9768587A JPS63264691A (en) | 1987-04-21 | 1987-04-21 | Composite gasket material and production of the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63264691A JPS63264691A (en) | 1988-11-01 |
| JPH0445548B2 true JPH0445548B2 (en) | 1992-07-27 |
Family
ID=14198828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9768587A Granted JPS63264691A (en) | 1987-04-21 | 1987-04-21 | Composite gasket material and production of the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63264691A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0614625U (en) * | 1990-12-28 | 1994-02-25 | ニチアス株式会社 | Metal gasket |
| JPH0632836U (en) * | 1992-09-29 | 1994-04-28 | ニチアス株式会社 | Head gasket |
| JPH08258203A (en) * | 1995-03-23 | 1996-10-08 | Nichias Corp | Separate plate for control valve in automatic transmission |
| JP4047413B2 (en) * | 1997-03-14 | 2008-02-13 | 日本ラインツ株式会社 | Rubber-coated gasket and manufacturing method thereof |
| JPH10273646A (en) * | 1997-03-28 | 1998-10-13 | Nichias Corp | Material for foamed rubber coated gasket |
| US7771817B2 (en) * | 2004-03-31 | 2010-08-10 | Nichias Corporation | Gasket material |
| CN108105383A (en) * | 2018-01-23 | 2018-06-01 | 合肥欧仕嘉机电设备有限公司 | A kind of high-performance sealed cushion pad |
| JP7344689B2 (en) * | 2019-07-16 | 2023-09-14 | Nok株式会社 | Multilayer laminated gasket and its manufacturing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138551A (en) * | 1976-04-02 | 1977-11-18 | Cefilac | Method and device for settling gasket band |
| JPS5339474A (en) * | 1976-09-24 | 1978-04-11 | Hitachi Chemical Co Ltd | Method of producing metallic core filled printed circuit board |
| JPS5472282A (en) * | 1977-11-21 | 1979-06-09 | Three Bond Co Ltd | Gasket material |
| JPS6053577A (en) * | 1983-09-01 | 1985-03-27 | Hayakawa Rubber Co Ltd | Vulcanization-type rubber adhesive |
| JPS60138148A (en) * | 1983-12-23 | 1985-07-22 | 松下電工株式会社 | Building board |
| JPS61278541A (en) * | 1985-06-04 | 1986-12-09 | Nok Corp | Metal sheet stuckd with rubber |
-
1987
- 1987-04-21 JP JP9768587A patent/JPS63264691A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138551A (en) * | 1976-04-02 | 1977-11-18 | Cefilac | Method and device for settling gasket band |
| JPS5339474A (en) * | 1976-09-24 | 1978-04-11 | Hitachi Chemical Co Ltd | Method of producing metallic core filled printed circuit board |
| JPS5472282A (en) * | 1977-11-21 | 1979-06-09 | Three Bond Co Ltd | Gasket material |
| JPS6053577A (en) * | 1983-09-01 | 1985-03-27 | Hayakawa Rubber Co Ltd | Vulcanization-type rubber adhesive |
| JPS60138148A (en) * | 1983-12-23 | 1985-07-22 | 松下電工株式会社 | Building board |
| JPS61278541A (en) * | 1985-06-04 | 1986-12-09 | Nok Corp | Metal sheet stuckd with rubber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63264691A (en) | 1988-11-01 |
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