JP4398973B2 - Fire protection sheet - Google Patents
Fire protection sheet Download PDFInfo
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- JP4398973B2 JP4398973B2 JP2006339099A JP2006339099A JP4398973B2 JP 4398973 B2 JP4398973 B2 JP 4398973B2 JP 2006339099 A JP2006339099 A JP 2006339099A JP 2006339099 A JP2006339099 A JP 2006339099A JP 4398973 B2 JP4398973 B2 JP 4398973B2
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- fireproof sheet
- flame retardant
- cable
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- 229920001971 elastomer Polymers 0.000 claims description 26
- 239000005060 rubber Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 23
- 229920000459 Nitrile rubber Polymers 0.000 claims description 18
- 239000011521 glass Substances 0.000 claims description 18
- 239000004744 fabric Substances 0.000 claims description 17
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical class N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 16
- 229920005601 base polymer Polymers 0.000 claims description 16
- -1 borate compound Chemical class 0.000 claims description 15
- 229920000800 acrylic rubber Polymers 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 229920000058 polyacrylate Polymers 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 description 28
- 239000003063 flame retardant Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000945 filler Substances 0.000 description 13
- 229910052736 halogen Inorganic materials 0.000 description 12
- 150000002367 halogens Chemical class 0.000 description 12
- 239000012796 inorganic flame retardant Substances 0.000 description 11
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 11
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 9
- 239000000347 magnesium hydroxide Substances 0.000 description 9
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 9
- 238000002156 mixing Methods 0.000 description 8
- 239000004902 Softening Agent Substances 0.000 description 7
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 238000004804 winding Methods 0.000 description 7
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 6
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 5
- 229910052794 bromium Inorganic materials 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 229910011255 B2O3 Inorganic materials 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 241001669573 Galeorhinus galeus Species 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229940030792 clinac Drugs 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Fireproofing Substances (AREA)
- Insulated Conductors (AREA)
Description
本発明は塩素や臭素等のハロゲン系難燃剤を含有せず、優れた防火性を有する防火用シートに関するものである。 The present invention relates to a fireproof sheet that does not contain a halogen-based flame retardant such as chlorine or bromine and has excellent fire resistance.
建物、洞道等において、多種類の電線、ケーブルが配線されているが、火災が発生した場合多大な被害を受ける例があり、ケーブル防災の要求は大きい。
ケーブル防災用の防火テープや防火シートの機能としては、通常の難燃性の他にテープやシート巻きで形成された防火層が燃焼により崩れ落ちることがなく、ケーブル被覆に粘着、固化して内部を保護することが望まれる。
また、ＯＦケーブルの場合や、マンホール内を想定して平常においての耐油性も要求される。
Many types of electric wires and cables are wired in buildings, caverns, etc., but there is an example of great damage when a fire breaks out, and there is a great demand for cable disaster prevention.
The fire protection tape and fire protection sheet for cable disaster prevention are not only flame retardant but also the fire protection layer formed by winding the tape and sheet does not collapse due to combustion. It is desirable to protect.
In addition, oil resistance in a normal state is also required in the case of an OF cable or in a manhole.
発明者は、ハロゲン系のポリマーと難燃剤を使用して良好な難燃性の防火用テープを提案している（例えば、下記特許文献１参照）が、ハロゲン系ポリマーやハロゲン系難燃剤を使わずに難燃性能を発現させるには、通常無機難燃性フィラーを大量に配合する必要があり、テープ、シートとしての物性、特に柔軟性に劣る点が懸念される。 The inventor has proposed a flame retardant tape having good flame retardancy using a halogen-based polymer and a flame retardant (for example, see Patent Document 1 below), but using a halogen-based polymer or a halogen-based flame retardant. In order to develop the flame retardancy, it is usually necessary to add a large amount of an inorganic flame retardant filler, and there is a concern that the physical properties, particularly the flexibility, of the tape and sheet are inferior.
更に、人的及び環境対応の面から、燃焼時に塩素や臭素等のハロゲンガスを発生しないことが強く求められる。
本発明は、上記の従来の問題点に鑑み、塩素や臭素等のハロゲンを含有せず、優れた難燃性、防火性を有すると共に、適度な強度と柔軟性、粘着性を持った防火用シート、特に電線またはケーブル用の防火シートを提供することを目的とする。 In view of the above-mentioned conventional problems, the present invention does not contain halogen such as chlorine and bromine, has excellent flame retardancy and fire resistance, and has appropriate strength, flexibility and adhesiveness. An object is to provide a fireproof sheet for a sheet, particularly an electric wire or cable.
本発明者らは、上記課題について鋭意検討を行ったところ、ベースポリマーとしてアクリルニトリルブタジエンゴム及び／又はアクリルゴムを必須成分とし、所定の無機フィラー類を配合することにより、ハロゲンガスを発生せず、燃焼時十分な難燃性能と固化性能を発揮し、シートとしての強度と柔軟性、粘着性が得られることを見いだし、この知見に基づき本発明をなすに至った。
すなわち、本発明は、
（１）アクリルニトリルブタジエンゴム及び又はアクリルゴムからなるベースポリマー１００質量部に対し、金属水和物１００〜５００質量部およびホウ酸塩化合物２０〜２００質量部を含有するゴム組成物を有する層がガラスクロスの少なくとも片面に形成されていて、ハロゲン系ポリマーおよびハロゲン系難燃剤を含有しないことを特徴とする防火用シート、
（２）前記ベースポリマーがアクリルニトリルブタジエンゴム１００質量部であることを特徴とする（１）記載の防火用シート、
（３）前記ゴム組成物が非架橋であることを特徴とする（１）または（２）記載の防火用シート、および
（４）電線またはケーブル用であることを特徴とする（１）〜（３）のいずれか１項記載の防火用シート、
を提供するものである。
As a result of intensive studies on the above problems, the present inventors have made acrylonitrile butadiene rubber and / or acrylic rubber as an essential component as a base polymer, and do not generate halogen gas by blending predetermined inorganic fillers. The present inventors have found that sufficient flame retardancy and solidification performance are exhibited during combustion, and that strength, flexibility, and adhesiveness as a sheet can be obtained, and the present invention has been made based on this finding.
That is, the present invention
(1) A layer having a rubber composition containing 100 to 500 parts by mass of a metal hydrate and 20 to 200 parts by mass of a borate compound with respect to 100 parts by mass of a base polymer composed of acrylonitrile butadiene rubber and / or acrylic rubber. A sheet for fire prevention , which is formed on at least one surface of a glass cloth and does not contain a halogen-based polymer and a halogen-based flame retardant ,
(2) The fireproof sheet according to (1), wherein the base polymer is 100 parts by mass of acrylonitrile butadiene rubber;
(3) The rubber composition is non-crosslinked, (1) or (2) fireproof sheet, and (4) an electric wire or cable (1) to ( 3) The fireproof sheet according to any one of
Is to provide.
本発明の防火用シートは、塩素や臭素等のハロゲン化合物を実質的に含有せず、燃焼時にダイオキシン等の有害ガスを発生することなく、そのうえ十分な難燃性能を有し、燃焼後でも燃焼残渣がガラスクロスと共に固化性能を発揮する。そして、防火用シートは、適度な強度と柔軟性、粘着性を持ち、特に、電線やケーブル用として好適である。 The fire protection sheet of the present invention does not substantially contain a halogen compound such as chlorine and bromine, does not generate harmful gas such as dioxin at the time of combustion, and has sufficient flame retardancy, and burns even after combustion. Residue exhibits solidification performance with glass cloth. And the fireproof sheet | seat has moderate intensity | strength, a softness | flexibility, and adhesiveness, and is especially suitable as an object for electric wires and cables.
以下、本発明の防火用シートについて詳細に説明する。
まず、本発明のノンハロゲンの防火用シートのガラスクロス面に層形成されるゴム組成物を構成する各成分およびその量について説明する。
Hereinafter, the fireproof sheet of the present invention will be described in detail.
First, each component constituting the rubber composition formed on the glass cloth surface of the non-halogen fireproof sheet of the present invention and the amount thereof will be described.
（ａ）ベースポリマー
本発明に用いられるベースポリマーとしては、ゴム系のアクリルニトリルブタジエンゴム（ＮＢＲ）又はアクリルゴムである。これらはそれぞれ単独で用いることもできるが或いは両者を任意の割合でブレンドして用いてもよい。
なお本発明におけるアクリルゴムは、モノマー成分の１つにアクリル酸エステルを有し、このアクリル酸エステルまたはそれを主体として共重合されて得られるゴム状弾性体をいい、熱可塑性樹脂の１種であるアクリル樹脂（例えば、エチレン−エチルアクリレート共重合体樹脂など）を含まないものとする。ベースポリマーとしてアクリルニトリルブタジエンゴム（ＮＢＲ）及び／又はアクリルゴムを用いることで、防火用シートに優れた耐油性が得られる。そのうえ、柔軟性や粘着性を付与する作用も有する。
それに対して熱可塑性樹脂の１種であるアクリル樹脂（例えば、エチレン−エチルアクリレート共重合体樹脂など）を使用した場合には、柔軟性の点で問題があり、使用することは困難である。
(A) Base polymer The base polymer used in the present invention is rubber-based acrylonitrile butadiene rubber (NBR) or acrylic rubber. Each of these can be used alone, or both may be blended at an arbitrary ratio.
The acrylic rubber in the present invention means an acrylic ester as one of monomer components, and refers to a rubber-like elastic body obtained by copolymerizing the acrylic ester or the acrylic ester, and is a kind of thermoplastic resin. A certain acrylic resin (for example, ethylene-ethyl acrylate copolymer resin) is not included. By using acrylonitrile butadiene rubber (NBR) and / or acrylic rubber as the base polymer, excellent oil resistance can be obtained for the fire protection sheet. In addition, it also has the effect of imparting flexibility and tackiness.
On the other hand, when an acrylic resin (for example, ethylene-ethyl acrylate copolymer resin) which is a kind of thermoplastic resin is used, there is a problem in terms of flexibility and it is difficult to use.
（ｂ）金属水和物（無機難燃性フィラー）
本発明のゴム組成物には、難燃性を確保する為に無機難燃性フィラーである金属水和物が配合される。これらの金属水和物は、環境問題に対応したノンハロゲンであり、難燃性を付加するために有用なものである。
本発明の樹脂組成物では、金属水和物の混合量は、ベースポリマー１００質量部に対し１００〜５００質量部であり、好ましくは１２０〜４００質量部、さらに好ましくは１５０〜３００質量部である。混合量が少なすぎると、難燃性に問題があり、多すぎると加工性が悪くなり、機械特性が著しく低下したり、耐油性、耐低温性が悪化する。
一般に、金属水和物を大量に配合すると耐油性は大幅に低下するが、本発明のゴム組成物はベースゴムとの関係で耐油性の低下がなく、バランスの良い優れた物性を維持することができる。
(B) Metal hydrate (inorganic flame retardant filler)
The rubber composition of the present invention is mixed with a metal hydrate that is an inorganic flame retardant filler in order to ensure flame retardancy. These metal hydrates are non-halogens corresponding to environmental problems, and are useful for adding flame retardancy.
In the resin composition of the present invention, the mixing amount of the metal hydrate is 100 to 500 parts by weight, preferably 120 to 400 parts by weight, more preferably 150 to 300 parts by weight with respect to 100 parts by weight of the base polymer. . If the mixing amount is too small, there is a problem in flame retardancy, and if it is too large, the workability is deteriorated, the mechanical properties are remarkably lowered, and the oil resistance and low temperature resistance are deteriorated.
In general, when a large amount of metal hydrate is blended, the oil resistance is greatly reduced, but the rubber composition of the present invention does not deteriorate the oil resistance in relation to the base rubber, and maintains excellent physical properties with a good balance. Can do.
本発明に用いられる無機難燃性フィラーである金属水和物は、例えば、水酸化アルミニウム、水酸化マグネシウム、またはこれらの混合物が好ましい。
本発明においては、通常市販されている水酸化アルミニウムや水酸化マグネシウムを使用することが可能である。水酸化アルミニウムまたは水酸化マグネシウムは、無処理のままでも、表面処理を施されていてもよい。表面処理としてはたとえば、脂肪酸処理、リン酸処理、チタネートやシランカップリング剤による処理などがあげられる。ベースゴムポリマーとの結合特性の点から、本発明においては、無処理のものか、シランカップリング剤、チタネートカップリング剤を用いたものを使用するのが好ましい。
すでにシランカップリング剤処理をおこなった水酸化マグネシウムを入手することも可能である。シランカップリング剤で表面処理された水酸化マグネシウムとしては、具体的には、「キスマ５Ｌ」、「キスマ５Ｎ」、「キスマ５Ｐ」（いずれも商品名、協和化学（株）製）や、「ファインマグＭＯ−Ｅ」（商品名、（株）ＴＭＧ）などがあげられる。
また、無処理の水酸化マグネシウムとしては、例えば「キスマ５」（商品名、協和化学（株））、「マグニフィンＨ５」（商品名、アルベマール（株））などがあげられる。
水酸化アルミニウムとしては、例えば無処理の「日軽金Ｂ−１０３」、「日軽金Ｂ−７０３」（商品名、日本軽金属（株））、「ハイジライトＨ-42」「ハイジライトＨ-32」（商品名、昭和電工（株）製などがあげられる。 また、表面処理品としては「日軽金Ｂ−１０３Ｓ」、「日軽金Ｂ−７０３Ｓ」、「日軽金Ｂ−１０３Ｔ」、「日軽金Ｂ−７０３Ｔ」（商品名、日本軽金属（株））、「ハイジライトＨ-42Ｓ」「ハイジライトＨ-32Ｓ」「ハイジライトＨ-42Ｔ」「ハイジライトＨ-32ＳＴ」（商品名、昭和電工（株）製）等を挙げることができる。
The metal hydrate which is an inorganic flame retardant filler used in the present invention is preferably, for example, aluminum hydroxide, magnesium hydroxide, or a mixture thereof.
In the present invention, commercially available aluminum hydroxide or magnesium hydroxide can be used. Aluminum hydroxide or magnesium hydroxide may be left untreated or surface-treated. Examples of the surface treatment include fatty acid treatment, phosphoric acid treatment, treatment with a titanate or a silane coupling agent, and the like. In the present invention, it is preferable to use an untreated one, or one using a silane coupling agent or a titanate coupling agent, from the viewpoint of the binding characteristics with the base rubber polymer.
It is also possible to obtain magnesium hydroxide that has already been treated with a silane coupling agent. Specific examples of magnesium hydroxide surface-treated with a silane coupling agent include “Kisuma 5L”, “Kisuma 5N”, “Kisuma 5P” (all trade names, manufactured by Kyowa Chemical Co., Ltd.), “ Finemag MO-E "(trade name, TMG Co., Ltd.).
Examples of untreated magnesium hydroxide include “Kisuma 5” (trade name, Kyowa Chemical Co., Ltd.), “Magnifine H5” (trade name, Albemarle Corp.), and the like.
As aluminum hydroxide, for example, untreated “Nikkin Gold B-103”, “Nikkin Gold B-703” (trade name, Nippon Light Metal Co., Ltd.), “Hijilite H-42”, “Hijilite H-” 32 "(trade name, manufactured by Showa Denko KK, etc.) Surface treatment products are" Nikkin Gold B-103S "," Nikkin Gold B-703S "," Nikkin Gold B-103T " , “Nikkin Kin B-703T” (trade name, Nippon Light Metal Co., Ltd.), “Hijilite H-42S”, “Hijilite H-32S”, “Hijilite H-42T”, “Heidilite H-32ST” (product) Name, manufactured by Showa Denko KK).
（ｃ）ホウ酸塩化合物
本発明のゴム組成物には、燃焼時あるいは燃焼後に生じる燃焼残渣の固化保持性のためホウ酸塩化合物を混合する。
本発明の樹脂組成物では、ホウ酸塩化合物の混合量は、ベースポリマー１００質量部に対し２０〜２００質量部であり、好ましくは３０〜１５０質量部、さらに好ましくは３５〜７０質量部である。その量が少なすぎると、燃焼時固化性が発現せず、多すぎると加工性が悪くなり柔軟性を阻害する。
ホウ酸塩化合物は、燃焼時の高温化で溶融し、燃焼残渣をガラス状に固化させ、ワレ、脱落の発生を抑える働きがある。したがって、燃焼後も基材であるガラスクロスとの一体化が良好で、飛び火が防げ、延焼防止効果も大きい。また、難燃性を高める働きもある。
(C) Borate compound The rubber composition of the present invention is mixed with a borate compound for solidification retention of a combustion residue generated during or after combustion.
In the resin composition of the present invention, the mixing amount of the borate compound is 20 to 200 parts by weight, preferably 30 to 150 parts by weight, more preferably 35 to 70 parts by weight with respect to 100 parts by weight of the base polymer. . If the amount is too small, the solidification property at the time of combustion does not appear, and if it is too large, the workability deteriorates and the flexibility is hindered.
The borate compound melts at a high temperature during combustion, solidifies the combustion residue into a glass, and has a function of suppressing cracking and dropping. Therefore, even after combustion, the integration with the glass cloth as the base material is good, and it is possible to prevent sparks and to have a great fire spread prevention effect. It also has the function of increasing flame retardancy.
本発明に用いられるホウ酸塩化合物としては、ホウ酸カルシウム、ホウ酸亜鉛、無水ホウ酸等がある。
本発明で用いることのできるホウ酸亜鉛として、具体的には例えば、「アルカネックスＦＲＣ−５００（２ＺｎＯ／３Ｂ２Ｏ３・３．５Ｈ２Ｏ）」、「ＦＲＣ−６００」（いずれも商品名、水澤化学（株）製）、「ファイヤーブレイクＺＢ」（商品名、リオテイントジャパン製）などがある。また、ホウ酸カルシウムとしては、例えば「ＵＢＰ」（商品名）、キンセイマテック（株）製が、また、無水ホウ酸として「Ｂｏｒｉｃ Ｏｘｉｄｅ」（商品名、Ｕ．Ｓ．Ｂｏｒａｘ Ｉｎｃ．製）がある。
Examples of the borate compound used in the present invention include calcium borate, zinc borate, and anhydrous boric acid.
Specific examples of zinc borate that can be used in the present invention include, for example, “Alkanex FRC-500 (2ZnO / 3B 2 O 3 .3.5H 2 O)”, “FRC-600” (both trade names , Manufactured by Mizusawa Chemical Co., Ltd.) and “Fire Break ZB” (trade name, manufactured by Rio Taint Japan). Examples of calcium borate include “UBP” (trade name) manufactured by Kinsei Matec Co., Ltd., and “Boric Oxide” (trade name, manufactured by US Borax Inc.) as boric anhydride. .
本発明のゴム組成物には、ベースポリマーを適度に軟質化するために軟化剤を適宜混合することできる。
軟化剤はベースゴムポリマーとの相溶性が良いものであれば特に限定されないが、エーテル・エステル系軟化剤、トリメリット酸系軟化剤、ポリエステル系可塑剤が好ましく、例えば市販品では、アデカサイザーＲＳ700、トリメックスＴ−０８、アデカサイザーＰＮ606等を挙げることができる。
軟化剤の混合量は、特に限定されるものではないが、ベースポリマー１００質量部に対し、好ましくは５〜２０質量部である。その量が少なすぎると、加工性、柔軟性が悪くなり、多すぎると難燃性を阻害する。
In the rubber composition of the present invention, a softening agent can be appropriately mixed to moderately soften the base polymer.
The softener is not particularly limited as long as it has good compatibility with the base rubber polymer, but is preferably an ether / ester softener, trimellitic acid softener, or polyester plasticizer. For example, commercially available products include Adeka Sizer RS700. , Trimex T-08, Adekasizer PN606 and the like.
The mixing amount of the softening agent is not particularly limited, but is preferably 5 to 20 parts by mass with respect to 100 parts by mass of the base polymer. If the amount is too small, processability and flexibility are deteriorated, and if it is too large, flame retardancy is impaired.
本発明のゴム組成物には、防火組成物に一般的に使用されている各種の添加剤、例えば酸化防止剤、難燃助剤、防カビ剤、加工助剤、着色剤などを本発明の目的を損なわない範囲で適宜含有することができる。 In the rubber composition of the present invention, various additives generally used in fireproofing compositions, such as antioxidants, flame retardant aids, fungicides, processing aids, colorants and the like of the present invention. It can contain suitably in the range which does not impair the objective.
本発明のゴム組成物は、非架橋のものを好ましく使用することができる。
非架橋のゴム組成物を使用することにより、柔軟性、粘着性が良好であり、ガラスクロスに塗工した場合基材との密着性が良好となり、燃焼時ガラスクロスに密着してそのまま固化する点にも寄与する。また、架橋していない場合には、廃却時に再利用が可能となる。
本発明のゴム組成物をガラスクロスに形成するには、適宜従来公知の方法を適用することができ、例えばゴム組成物を溶剤に溶解し、その後コーターでガラスクロスの片面または両面にコーティングし、乾燥して本発明の防火用シートを製造することができる。
As the rubber composition of the present invention, a non-crosslinked rubber composition can be preferably used.
By using a non-crosslinked rubber composition, the flexibility and tackiness are good, and when applied to a glass cloth, the adhesion to the substrate is good, and it adheres to the glass cloth during combustion and solidifies as it is. Also contributes to the point. In addition, when it is not crosslinked, it can be reused at the time of disposal.
In order to form the rubber composition of the present invention on a glass cloth, a conventionally known method can be appropriately applied. For example, the rubber composition is dissolved in a solvent, and then coated on one or both sides of the glass cloth with a coater. It can dry and can manufacture the fireproof sheet of this invention.
次に、本発明の防火用シートの基材となるガラスクロスについて説明する。
ガラスクロスは耐熱性、難燃性、機械的強度に優れ防火用シートの基材として好適である。このガラスクロスは使用する糸のサイズや織り方、質量によってさまざまな種類があるが、シート状で巻き付けやすく、破けにくい機械的強度があれば良い。
このため、特に制限はないが、例えば、平織りで厚さは0.1〜0.35ｍｍ程度、質量は100ｇ/ｍ2〜400ｇ/ｍ2程度のものを好ましく使用することができ、「Ｈ２０１Ｍ」（厚さ０．１８ｍｍ、質量２０８ｇ/ｍ2）、「Ｈ３４０Ｆ」（厚さ０．２８ｍｍ、質量３３０ｇ/ｍ2）、（商品名、ユニチカグラスファイバー（株）製）や「ＷＦ１５０ １００ ＢＳ６」（厚さ０．２２ｍｍ、質量１４４ｇ/ｍ2）、「ＷＦ３５０ １００ ＢＳ６」（厚さ０．３３ｍｍ、質量３２８ｇ/ｍ2）、（商品名、日東紡（株）製）などがある。
Next, the glass cloth used as the base material of the fireproof sheet of the present invention will be described.
Glass cloth is excellent in heat resistance, flame retardancy, and mechanical strength, and is suitable as a base material for fire protection sheets. There are various types of glass cloth depending on the size, weaving method, and mass of the yarn to be used. However, it is sufficient that the glass cloth has a mechanical strength that is easy to wind in a sheet shape and is difficult to break.
Therefore, although not particularly limited, for example, a thickness of plain weave about 0.1～0.35Mm, mass can be preferably used of about 100g / m 2 ~400g / m 2 , "H201M" (thickness 0.18 mm, mass 208 g / m 2 ), “H340F” (thickness 0.28 mm, mass 330 g / m 2 ), (trade name, manufactured by Unitika Glass Fiber Co., Ltd.) and “WF150 100 BS6” (thickness 0) .22 mm, mass 144 g / m 2 ), “WF350 100 BS6” (thickness 0.33 mm, mass 328 g / m 2 ), (trade name, manufactured by Nittobo Co., Ltd.), and the like.
本発明の防火用シートの製造方法を説明する。
ベースポリマーに金属水和物およびホウ酸塩化合物、さらに必要に応じて前記した軟化剤や他の添加剤を加え、加熱混練する。混練方法としては、ゴム、プラスチックなどで通常用いられる方法であれば満足に使用でき、装置としては例えば、一軸押出機、二軸押出機、ロール、バンバリーミキサーあるいは各種のニーダーなどが用いられる。この工程により、各成分が均一に分散されたゴム組成物を得ることができる。
得られたゴム組成物を溶剤で溶解した後、例えばコーターにてガラスクロスの片面又は両面にコーティングし、乾燥し、ガラスクロス面にゴム組成物の層を形成する。
本発明の防火用シートには、さらに延焼防止効果を付与するために、巻き始めと巻き終わりとなる部分に、長さ方向の片側に熱膨張性部材を設けてもよい。この熱膨張性部材も塩素や臭素等のハロゲンを含有しない材料で構成することが好ましい。
The manufacturing method of the fireproof sheet of this invention is demonstrated.
To the base polymer, a metal hydrate and a borate compound and, if necessary, the above-mentioned softener and other additives are added and kneaded by heating. The kneading method can be satisfactorily used as long as it is a method usually used for rubber, plastic and the like. As the apparatus, for example, a single screw extruder, a twin screw extruder, a roll, a Banbury mixer or various kneaders are used. By this step, a rubber composition in which each component is uniformly dispersed can be obtained.
After the obtained rubber composition is dissolved with a solvent, it is coated on one or both sides of the glass cloth with a coater, for example, and dried to form a layer of the rubber composition on the glass cloth surface.
In order to further impart a fire spread prevention effect to the fireproof sheet of the present invention, a thermally expandable member may be provided on one side in the length direction at the portions that become the start and end of winding. This thermally expandable member is also preferably made of a material containing no halogen such as chlorine or bromine.
次に、本発明を実施例に基づいてさらに詳細に説明するが、本発明はこれに制限されるものではない。
［実施例１〜８および比較例１〜５］
表１〜２に示すベースポリマーと各配合剤（材料）をニーダーで混合し混和物とし、ロールで板取り後、溶剤とともに撹拌機で溶解した後、バーコーターにて厚さ０．２８ｍｍのガラスクロス（「Ｈ３４０Ｆ」、（商品名、ユニチカグラスファイバー製）の両面にコーティングし、乾燥し、厚さ０．４ｍｍの防火用シートを得た。
[比較例５]
また比較例５の場合は、溶剤とともに撹拌機で溶解し均一な組成物とできなかったので、他の実施例、比較例に使用したのと同じガラスクロスに比較例５の混和物を熱プレスにより圧着して、厚さ０．４ｍｍの防火用シートを得た。
表１〜２における組成を示す数値の単位は質量部である。比較例５以外は溶剤はトルエンを用い、その配合量は混和物と同量であるが、乾燥後のシートには含まれない為、表示していない。
Next, the present invention will be described in more detail based on examples, but the present invention is not limited thereto.
[Examples 1-8 and Comparative Examples 1-5]
The base polymer shown in Tables 1 and 2 and each compounding agent (material) are mixed with a kneader to form an admixture, plated with a roll, dissolved with a stirrer together with a solvent, and then glass with a thickness of 0.28 mm using a bar coater. A cloth (“H340F”, (trade name, manufactured by Unitika Glass Fiber) was coated on both sides and dried to obtain a fireproof sheet having a thickness of 0.4 mm.
[Comparative Example 5]
Further, in the case of Comparative Example 5, since it was dissolved with a stirrer together with a solvent and a uniform composition could not be obtained, the mixture of Comparative Example 5 was hot-pressed on the same glass cloth used in other examples and comparative examples. To obtain a fireproof sheet having a thickness of 0.4 mm.
The unit of the numerical value which shows the composition in Tables 1-2 is a mass part. Except for Comparative Example 5, toluene is used as the solvent, and the blending amount is the same as that of the admixture, but is not shown because it is not included in the dried sheet.
以下に、各実施例および比較例で用いた表１〜２に記載の材料（１）〜（１０）について説明する。
(１)アクリルゴム 「トアアクロンＰＳ２２０」（商品名、（株）トウペ製）
(２)アクリルニトリルブタジエンゴム（ＮＢＲ）
「クライナック３３４５」（商品名、バイエル社製）
(３)水酸化アルミニウム 「日軽金Ｂ−１０３」（商品名、日本軽金属（株）製）
(４)水酸化マグネシウム 「キスマ５Ａ」（商品名、協和化学（株）製）
(５)ホウ酸亜鉛 「ファイヤーブレイクＺＢ」（商品名、リオテイントジャパン製）
(６)軟化剤Ａ（エーテル・エステル系）
「アデカサイザーＲＳ７００」（商品名、旭電化工業（株）製）
(７)軟化剤Ｂ（トリメリット酸系）
「トリメックスＴ-０８」（商品名、花王（株）製）
(８)軟化剤Ｃ（パラフィン系）
「ダイアナプロセスＰＷ-３８０」（商品名、出光興産（株）製）
(９)エチレンプロピレンゴム（ＥＰＤＭ）
「ＥＰＴ３０４５」（商品名、三井化学（株）製）
（１０）アクリル樹脂（ＥＥＡ）
「エバフレックス-ＥＥＡ Ａ-７０３」（商品名、三井・デュポンポリケミカル（株）製）
Below, material (1)-(10) of Tables 1-2 used by each Example and the comparative example is demonstrated.
(1) Acrylic rubber “Toaaclon PS220” (trade name, manufactured by Tope Corp.)
(2) Acrylic nitrile butadiene rubber (NBR)
"Clinac 3345" (trade name, manufactured by Bayer)
(3) Aluminum hydroxide “Nikkin Kin B-103” (trade name, manufactured by Nippon Light Metal Co., Ltd.)
(4) Magnesium hydroxide “Kisuma 5A” (trade name, manufactured by Kyowa Chemical Co., Ltd.)
(5) Zinc borate "Fire Break ZB" (trade name, manufactured by Rio Tinto Japan)
(6) Softener A (ether / ester)
“Adeka Sizer RS700” (trade name, manufactured by Asahi Denka Kogyo Co., Ltd.)
(7) Softener B (trimellitic acid type)
"Trimex T-08" (trade name, manufactured by Kao Corporation)
(8) Softener C (paraffin type)
"Diana Process PW-380" (trade name, manufactured by Idemitsu Kosan Co., Ltd.)
(9) Ethylene propylene rubber (EPDM)
"EPT3045" (trade name, manufactured by Mitsui Chemicals, Inc.)
(10) Acrylic resin (EEA)
“Evaflex-EEA A-703” (trade name, manufactured by Mitsui DuPont Polychemical Co., Ltd.)
上記の実施例１〜８および比較例１〜５において作製した防火用シートについて、以下の評価を行い、その結果を表３〜４に記載した。
（１）巻き付け安定性Ａ
径約３０ｍｍ×長さ３００ｍｍのケーブル１本を防火用シートで重なり部分５０ｍｍとなるように巻きつけ、両端をφ1ｍｍ銅線で固定し、ケーブル巻き付け品Ａを得た。
この時、防火用シートがケーブルへの追従ができ、固定部を含め破れがないものを「○」、追従性が悪い或いは破れが発生したものは「×」とした。
（２）巻き付け安定性Ｂ
径約３０ｍｍ×長さ３００ｍｍのケーブル２本を並べ、これを防火用シートで重なり部分５０ｍｍとなるように巻きつけ、両端をφ1ｍｍ銅線で固定し、ケーブル巻き付け品Ｂを得た。
この時、防火用シートがケーブルへの追従ができ、固定部を含め破れがないものを「○」、追従性が悪い或いは破れが発生したものは「×」とした。
（３）難燃性Ａ
上記（１）のケーブル巻き付け品Ａを試料とし、ＪＩＳ Ｃ ３００５の傾斜試験により燃焼を行った。燃焼時間は１０分間とし、炎を取り去った後１５秒以内で自然に消えた場合を「○」、消えなかった場合を「×」とした。
（４）難燃性Ｂ
上記（２）のケーブル巻き付け品Ｂを試料とし、ＪＩＳ Ｃ ３００５の傾斜試験に準拠し燃焼を行った。但し、接炎は２本のケーブルの中間のシート部分で重なりのない箇所、燃焼時間は連続１０分間とし、炎を取り去った後１５秒以内で自然に消えた場合を「○」、消えなかった場合を「×」とした。
（５）燃焼残渣安定性Ａ
上記難燃性Ａの燃焼試験で消えた後、燃焼残渣が固化して落下がなければ「○」、落下があれば「×」とした。また、固化がより強固なものを「◎」とした。
（６）燃焼残渣安定性Ｂ
上記難燃性Ｂの燃焼試験で消えた後、燃焼残渣が固化して落下がなければ「○」、落下があれば「×」とした。また、固化がより強固なものを「◎」とした。
（７）耐油性
前記と同様のケーブル巻き付け品Ａを試料とし、ＪＩＳ Ｃ ２３２０に定められた絶縁油１号相当の油に４０℃で１０日間浸漬し、試験後試料にわれ、ふくれ、剥がれ等の異常がないものを「○」、何らかの異常のあったものを「×」とした。
The following evaluation was performed about the fireproof sheet produced in said Examples 1-8 and Comparative Examples 1-5, and the result was described in Tables 3-4.
(1) Winding stability A
One cable having a diameter of about 30 mm and a length of 300 mm was wrapped with a fireproof sheet so that the overlapping portion was 50 mm, and both ends were fixed with φ1 mm copper wire to obtain a cable wound product A.
At this time, the fireproof sheet was able to follow the cable, and the case where the fixing part was not broken and was not torn was indicated as “◯”, and the case where the followability was poor or the breakage occurred was marked as “X”.
(2) Winding stability B
Two cables each having a diameter of about 30 mm and a length of 300 mm were arranged, wound with a fireproof sheet so that the overlapping portion was 50 mm, and both ends were fixed with φ1 mm copper wire to obtain a cable wound product B.
At this time, the fireproof sheet was able to follow the cable, and the case where the fixing part was not broken and was not torn was indicated as “◯”, and the case where the followability was poor or the breakage occurred was marked as “X”.
(3) Flame resistance A
The cable wound product A of (1) above was used as a sample, and combustion was performed by a JIS C 3005 inclination test. The burning time was 10 minutes, and “◯” represents the case where it naturally disappeared within 15 seconds after the flame was removed, and “x” represents the case where it did not disappear.
(4) Flame resistance B
Using the cable-wrapped product B of (2) above as a sample, combustion was performed in accordance with a tilt test of JIS C 3005. However, the flame contact was a non-overlapping part in the middle sheet part of the two cables, the burning time was 10 minutes continuously, “○” when it disappeared naturally within 15 seconds after removing the flame, did not disappear The case was set as “x”.
(5) Combustion residue stability A
After disappearing in the flame retardant A combustion test, the result was “◯” if the combustion residue solidified and did not fall, and “X” if there was a fall. Moreover, the solidification was marked as “◎”.
(6) Combustion residue stability B
After disappearing in the flame retardant B combustion test, “○” is indicated when the combustion residue is solidified and does not fall, and “X” is indicated when it falls. Moreover, the solidification was marked as “◎”.
(7) Oil resistance Using the same cable wrapping product A as described above as a sample, immerse it in an oil equivalent to insulating oil No. 1 defined in JIS C 2320 at 40 ° C. for 10 days. Those with no abnormalities were marked with “◯”, and those with any abnormality were marked with “x”.
実施例１は、アクリルゴムベースで水酸化アルミニウムとホウ酸塩の混合量が少なめな例である。フィラ−が少ないため柔軟性良好でケーブルへの巻き付け性は良く、難燃性Ａは０〜５秒で消炎、難燃性Ｂも５〜１０秒で消炎、燃焼残渣も崩れることなく、耐油性も良好であった。
実施例２は、アクリルゴムベースで、水酸化アルミニウムを中量配合し、ホウ酸塩は少なめ、軟化剤としてエーテル・エステル系を配合した例であるが、ケーブルへの巻き付け性は良好であり、難燃性Ａは０秒で消炎、難燃性Ｂも０〜５秒で消炎、燃焼残渣も崩れることなく、耐油性も良好であった。
実施例３は、アクリルゴム７０質量部とＮＢＲ３０質量部を混合し、水酸化アルミニウムとホウ酸塩を中量配合し、軟化剤としてエーテル・エステル系を配合した例であるが、ケーブルへの巻き付け性は良好であり、難燃性Ａ、Ｂとも０秒で消炎、燃焼時固化性は強く、耐油性も良好であった。
実施例４は、実施例３と同様にゴム成分を併用した例であるが、ポリマーをアクリルゴム３０質量部とＮＢＲ７０質量部とした例である。実施例３と同様に良好な結果を示すものであった。
Example 1 is an example in which the amount of aluminum hydroxide and borate mixed is small with an acrylic rubber base. Since there are few fillers, it has good flexibility and good wrapping properties on the cable. Flame resistance A is 0-5 seconds extinguishing, flame resistance B is 5-10 seconds extinguishing, combustion residue does not collapse, oil resistance Was also good.
Example 2 is an acrylic rubber base, which contains an intermediate amount of aluminum hydroxide, a small amount of borate, and an ether / ester compound as a softening agent, but the winding property to the cable is good, Flame resistance A was flame retardant in 0 seconds, flame retardant B was also flame retardant in 0 to 5 seconds, the combustion residue did not collapse, and oil resistance was good.
Example 3 is an example in which 70 parts by mass of acrylic rubber and 30 parts by mass of NBR are mixed, aluminum hydroxide and borate are mixed in a medium amount, and ether / ester is mixed as a softening agent. The flame retardancy A and B were both flame extinguishing in 0 seconds, solidifying property during combustion was strong, and oil resistance was also good.
Example 4 is an example in which a rubber component is used in the same manner as Example 3, but the polymer is 30 parts by mass of acrylic rubber and 70 parts by mass of NBR. As in Example 3, good results were shown.
実施例５は、実施例４と同様であるが、ポリマーをＮＢＲベースとした例である。実施例２と同様に良好であった。
実施例６は、ＮＢＲベースで無機難燃性フィラーとして水酸化マグネシウムを配合した例であるが、ケーブルへの巻き付け性は良好であり、難燃性Ａ、Ｂとも０秒で消炎、燃焼時固化性は強く、耐油性も良好であった。
実施例７は、ＮＢＲベースで無機難燃性フィラーとして水酸化アルミニウムと水酸化マグネシウム両方配合し、軟化剤としてトリメリット酸系を用いた。ケーブルへの巻き付け性は良好であり、難燃性Ａ、Ｂとも０秒で消炎、燃焼時固化性は強く、耐油性も良好であった。
実施例８は、ＮＢＲベースで水酸化アルミニウムとホウ酸塩を多めに配合し軟化剤としてエーテル・エステル系を配合している。ケーブル巻き付け性は問題なく、難燃性Ａ、Ｂとも０秒で消炎、燃焼時固化性は強く、耐油性も良好であった。
Example 5 is similar to Example 4, but is an example where the polymer was based on NBR. It was as good as Example 2.
Example 6 is an example in which magnesium hydroxide is blended as an inorganic flame retardant filler based on NBR, but the wrapping property to the cable is good, and both flame retardant A and B are extinguished in 0 seconds and solidified during combustion. The oil was strong and the oil resistance was also good.
In Example 7, both aluminum hydroxide and magnesium hydroxide were blended as an inorganic flame retardant filler based on NBR, and trimellitic acid was used as a softening agent. Winding property around the cable was good, both flame retardancy A and B were extinguished in 0 seconds, solidifying property during combustion was strong, and oil resistance was also good.
In Example 8, a large amount of aluminum hydroxide and borate are blended on an NBR basis, and an ether ester system is blended as a softening agent. The cable wrapping property was satisfactory, and both flame retardancy A and B were extinguished in 0 seconds, solidified during combustion, and had good oil resistance.
これに対し、比較例１は、アクリルゴムベースであるが、無機難燃性フィラーの配合量が５０質量部と少ない例であり、難燃性Ａ、難燃性Ｂの試験で１５秒以内に消炎せず、延焼した。
比較例２は、ＮＢＲベースで無機難燃性フィラー２００質量部として難燃性は良好であったが、ホウ酸塩の配合がなく、燃焼時の固化性が弱く、燃焼残渣の落下が見られた。
比較例３は、無機難燃性フィラーの配合量が７００質量部と多すぎる例であり、フィラー量が多すぎて硬くなり、ケーブル巻き付け時の追従性が悪く両端の固定部付近で破れが発生した。
比較例４は、ベースポリマーをエチレン・プロピレンゴムとし、無機難燃性フィラーとホウ酸塩は適量配合し、軟化剤はエチレン・プロピレンゴムと相溶性の良いパラフィン系とした例である。ケーブル巻き付け性、難燃性は良好であったが、耐油性試験で、割れが発生した。
比較例５は、アクリル樹脂のＥＥＡをベースポリマーとして無機難燃性フィラーの配合量を配合した例であり、ポリマーがプラスチックのため硬くて粘着性がなく、合わせ目が開いており、ケーブルへの追随性が悪かった。
On the other hand, Comparative Example 1 is an acrylic rubber base, but the amount of inorganic flame retardant filler is as small as 50 parts by mass, and within 15 seconds in the flame retardant A and flame retardant B tests. Fire spread without extinguishing.
In Comparative Example 2, flame retardance was good as 200 parts by mass of inorganic flame retardant filler based on NBR, but borate was not blended, solidification during combustion was weak, and combustion residue dropped. It was.
Comparative Example 3 is an example in which the blending amount of the inorganic flame retardant filler is too large as 700 parts by mass, and the filler amount becomes too hard and the followability at the time of winding the cable is poor and tearing occurs near the fixed parts at both ends. did.
Comparative Example 4 is an example in which the base polymer is ethylene / propylene rubber, an appropriate amount of inorganic flame retardant filler and borate are blended, and the softening agent is paraffin that is compatible with ethylene / propylene rubber. Cable wrapping and flame retardancy were good, but cracking occurred in the oil resistance test.
Comparative Example 5 is an example in which the blending amount of the inorganic flame retardant filler is blended using EEA of acrylic resin as a base polymer, and the polymer is hard because it is plastic, is not sticky, and has an open seam. The following ability was bad.
Claims (4)
The fireproof sheet according to any one of claims 1 to 3, wherein the fireproof sheet is used for an electric wire or a cable.
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