JPH03234742A - Method and apparatus for producing flame-retardant open-cell polyethylene foam - Google Patents
Method and apparatus for producing flame-retardant open-cell polyethylene foamInfo
- Publication number
- JPH03234742A JPH03234742A JP3222090A JP3222090A JPH03234742A JP H03234742 A JPH03234742 A JP H03234742A JP 3222090 A JP3222090 A JP 3222090A JP 3222090 A JP3222090 A JP 3222090A JP H03234742 A JPH03234742 A JP H03234742A
- Authority
- JP
- Japan
- Prior art keywords
- open
- foam
- phosphorus
- cell
- monomer
- 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.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 41
- -1 polyethylene Polymers 0.000 title claims abstract description 35
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 32
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 32
- 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 compound 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 title claims description 18
- 239000003063 flame retardant Substances 0.000 title claims description 17
- 238000000034 method Methods 0.000 title description 3
- 239000000178 monomer Substances 0.000 claims abstract description 27
- 238000010894 electron beam technology Methods 0.000 claims abstract description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract 2
- 229920002554 vinyl polymer Polymers 0.000 claims abstract 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 28
- 239000011574 phosphorus Substances 0.000 claims description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 26
- 238000005470 impregnation Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 7
- 238000004132 cross linking Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 239000012466 permeate Substances 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 17
- 239000007789 gas Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 210000000170 cell membrane Anatomy 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- YRIOTLGRXFJRTJ-UHFFFAOYSA-N (1,1-diphenyl-2-phosphonooxyethyl) prop-2-enoate Chemical compound C=1C=CC=CC=1C(OC(=O)C=C)(COP(O)(=O)O)C1=CC=CC=C1 YRIOTLGRXFJRTJ-UHFFFAOYSA-N 0.000 description 1
- JVQMWXKXWXSNBH-UHFFFAOYSA-N 2-diphenoxyphosphoryloxyethyl prop-2-enoate Chemical compound C=1C=CC=CC=1OP(=O)(OCCOC(=O)C=C)OC1=CC=CC=C1 JVQMWXKXWXSNBH-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241001662103 Cryptocarya corrugata Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 150000003017 phosphorus Chemical class 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は難燃化ポリエチレン連続気泡発泡体の製造方法
と装置に関し、より詳しくは、予め製造されたポリエチ
レン連続気泡発泡体に、難燃化度と含有燐率が比例し、
含有燐率と粘度も比例し、粘度と連続気泡含浸率が反比
例する固有物性を持った含リンモノマーを、真空加圧又
はその反復の含浸によって、困難な含浸を容易にし、重
合が簡易化されて、極めて難燃度が高く、有害性のない
ポリエチレン連続気泡発泡体を発泡体の二次加工により
、工業的に容易に量産する製造方法と装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and apparatus for producing flame-retardant open-cell polyethylene foam. The degree of phosphorus content is proportional to the content of phosphorus.
Using a phosphorus-containing monomer, which has the inherent physical properties that the phosphorus content and viscosity are proportional, and the viscosity and open cell impregnation rate are inversely proportional, difficult impregnation is facilitated by vacuum pressure application or repeated impregnation, and polymerization is simplified. The present invention relates to a manufacturing method and apparatus for industrially easily mass-producing polyethylene open-cell foam that has extremely high flame retardancy and is non-hazardous through secondary processing of the foam.
従来の難燃化ポリエチレン発泡体としては連続気泡であ
れ独立気泡であれ、発泡をするポリエチレン樹脂、発泡
剤等のその素材の中に、難燃化作用をもたらす有機ハロ
ゲン化物、特に塩素化物と三酸化アンチモンのような金
属化合物を混合して、その混合組成材料を発泡し、発泡
工程で難燃化しており、燃焼時に難燃化成分より難燃ガ
スを発生して、該ガスのマスキング作用で空気中の酸素
を遮断し、物理的に難燃化するもので、如何に難燃化し
ても多少燃焼すること、及び有害ガスを発生することが
さけられなかった。Conventional flame-retardant polyethylene foams, whether open-cell or closed-cell, contain organic halides, especially chlorides, and trichlorides in their materials, such as the foaming polyethylene resin and the blowing agent. A metal compound such as antimony oxide is mixed and the mixed composition material is foamed to make it flame retardant in the foaming process. When burned, the flame retardant component generates a flame retardant gas, and the masking effect of the gas It blocks oxygen in the air and makes it physically flame retardant, so no matter how much flame retardant it is made, it cannot avoid burning to some extent and generating harmful gases.
このような従来例にあっては、難燃化しても有機化合物
が持つ燃焼を抑止出来ず、難燃機能と共に塩素のような
ハロゲン化合物類の有害ガスを発生し、加えて難燃化素
材を混合することによる発泡の均一性が失われ、又架橋
が化学架橋剤のみによって形成されているので、架橋度
に限度があって耐熱性に乏しいと言うような問題点を持
っていた。In such conventional methods, even if flame retardant materials are used, they cannot suppress the combustion of organic compounds, and in addition to flame retardant properties, harmful gases such as halogen compounds such as chlorine are generated, and in addition, flame retardant materials are not used. There are problems in that the uniformity of foaming caused by mixing is lost, and since the crosslinking is formed only by a chemical crosslinking agent, the degree of crosslinking is limited and heat resistance is poor.
そこで本発明は、難燃ガスのマスキング作用によって燃
焼に必要な酸素を遮断する物理的難燃化とは本質的に異
る、後天的に二次加工で付加した含リンモノマー重合の
燐化合物により、燃焼に必要な酸素を化学的に吸収除去
して、ポリエチレン連続気泡発泡体が全く燃焼出来ない
ように、当然のこと乍ら、ハロゲン類のような有害ガス
を発生せず、化学架橋と共に電子′線架橋が加わるので
、その相乗効果によって耐熱性が向上し、更に均一組成
形状の発泡が得られて、本来の難燃化機能を満足する難
燃化ポリエチレン連続気泡発泡体を、低コストで迅速に
製造しうる、製造方法と装置を提供しようとするもので
ある。Therefore, the present invention uses a phosphorus compound obtained by polymerizing a phosphorus-containing monomer added in secondary processing, which is essentially different from physical flame retardation that blocks oxygen necessary for combustion by the masking effect of flame retardant gas. By chemically absorbing and removing the oxygen necessary for combustion, the open-cell polyethylene foam is prevented from burning at all, and of course, it does not generate harmful gases such as halogens, and it does not generate any harmful gases such as halogens. 'Since linear crosslinking is added, the heat resistance is improved due to the synergistic effect, and a foam with a uniform composition shape can be obtained, making it possible to produce flame-retardant open-cell polyethylene foam that satisfies the original flame-retardant function at a low cost. The purpose is to provide a manufacturing method and device that can be manufactured quickly.
〔問題点を解決するための手段の概要〕本発明において
は、有機化合物であるポリエチレン連続気泡発泡体が引
火燃焼する、或は燃焼を持続する、酸素を如何に化学的
に除去するかと言うこと、そのためには、含有情事の高
い粘調な含リンモノマーを如何にして連続気泡の端末ま
で含浸するかと言うことに着目して、次のような点を基
本的技術設計思想とした。[Summary of means for solving the problem] In the present invention, the problem is how to chemically remove oxygen that causes polyethylene open-cell foam, which is an organic compound, to ignite or sustain combustion. To achieve this, we focused on how to impregnate the ends of open cells with a highly viscous phosphorus-containing monomer, and the following points were adopted as the basic technical design concept.
（１）含リンモノマーの粘度の低いものは含浸し易いが
一回の含浸電子線照射では十分な難燃化機能を得られな
いので、粘調な含有情事の高い含リンモノマーを、真空
減圧下で含浸すること、加熱して粘度を下げて含浸する
こと、真空減圧して含浸した後加圧すること、等によっ
て含浸を容易にすること。(1) Phosphorus-containing monomers with low viscosity are easy to impregnate, but a single impregnation electron beam irradiation does not provide sufficient flame retardancy. Impregnation can be facilitated by impregnating under pressure, heating to lower the viscosity, applying pressure after impregnation under vacuum, etc.
（２）ポリエチレン連続気泡発泡体の連続気泡は発泡体
を製造してから、連続気泡充足加工として加圧等により
気泡膜を破って連続性の高い気泡にしているので、気泡
はジグザグ凸凹に気泡径の異ったものが、繋がって複雑
繊細に連続気泡を形成しているので、極めて含浸が困難
で、とりわけ気泡細部や気泡末端は未含浸になり易いか
ら、毛細管に近いようなものでも万遍なく含浸出来る上
記（１）のような物理的方法を組合せ反復して構じるこ
と。(2) The open cells in polyethylene open cell foam are made into highly continuous cells by breaking the cell membrane using pressure etc. as an open cell filling process after the foam is manufactured, so the cells are formed in a zigzag pattern. Since cells of different diameters are connected to form complex and delicate open cells, it is extremely difficult to impregnate them, and especially the details and ends of the cells tend to remain unimpregnated. It is possible to combine and repeat physical methods such as those described in (1) above that allow uniform impregnation.
上記技術条件を満すために、本発明の設計条件は、１気
圧以上の耐圧性を持つ密閉容器であること、密閉耐圧容
器と含リンモノマー貯槽は共に加熱保温機能を持つこと
、各機器装置間の真空、注入配管は１気圧以上に耐えて
バルブ又はコック操作が可能なこと、による装置である
開発をした。In order to satisfy the above technical conditions, the design conditions of the present invention are that the container must be airtight with pressure resistance of 1 atmosphere or more, that both the airtight pressure resistant container and the phosphorus monomer storage tank have a heating and heat retention function, and that each equipment We have developed a device that allows the injection pipe to withstand a pressure of 1 atmosphere or more and to be able to operate the valve or cock.
本発明に使用される材料と装置について、実施例に基づ
いて説明する。Materials and devices used in the present invention will be explained based on examples.
（１） ポリエチレン連続気泡発泡体の構造第１図は
ポリエチレン連続気泡発泡体の断面図の１例であるが、
１はスライスされた表面、２は架橋ポリエチレン樹脂膜
、３は発泡剤によって形成された気泡、４は加圧等によ
（２）
って気泡膜を破り連続気泡として繋っている大部分を示
し、本発明は３及び４に含リンモノマーを含浸充填する
ことに係るものであるが、３の気泡径は数十ミクロンよ
り数ミリ程度まであり、又４の穴の破壊口径は数十ミク
ロン乃至数百ミクロンの大きさのものが多い。(1) Structure of open-cell polyethylene foam Figure 1 is an example of a cross-sectional view of open-cell polyethylene foam.
1 is the sliced surface, 2 is the cross-linked polyethylene resin membrane, 3 is the bubbles formed by the foaming agent, and 4 is the bubble membrane that is broken by applying pressure (2) to remove most of the connected cells as open cells. The present invention relates to impregnating and filling phosphorus-containing monomers in 3 and 4, but the bubble diameter in 3 is from several tens of microns to several millimeters, and the fracture diameter of the hole in 4 is several tens of microns. Many have a size of several hundred microns.
含リーンモノマー物性
本発明に使用する、２−アクリロイルオキシエチルアシ
ッド木スフエートは含有燐量１２．６９６であるが粘度
は２５°Ｃに於て３，０００〜５，０００センチボイズ
にて酸価２８０ ミ！Ｉグラムであり含有燐量粘度共に
高い。Lean monomer-containing physical properties The 2-acryloyloxyethyl acid wood sulfate used in the present invention has a phosphorus content of 12.696, but a viscosity of 3,000 to 5,000 centiboise at 25°C and an acid value of 280 ml. ! I grams, and both the phosphorus content and viscosity are high.
又、ジフェニール−２アクリロイルオキシエチルホスフ
エートは含有燐量８．４％で粘度は２５°Ｃで６０セン
チボイズにて酸価２ミリグラムと含有燐量粘度共に低く
、こうした含有燐量の低いものを使用するには含浸操作
を反復して、ジフェニール２−アクリロイルオキシエチ
ルホスフェートの含浸量を多くして含有燐量を増大する
ことが必要条件である。In addition, diphenyl-2 acryloyloxyethyl phosphate has a phosphorus content of 8.4% and a viscosity of 2 mg at 25°C and 60 centiboise, and both the phosphorus content and viscosity are low, so we use a product with a low phosphorus content. In order to achieve this, it is necessary to repeat the impregnation operation to increase the amount of diphenyl 2-acryloyloxyethyl phosphate impregnated to increase the amount of phosphorus contained.
（３）密閉耐圧性真空含浸タンクと貯槽の構造第２図は
密閉耐圧性容器である真空含浸タンク、第３図は含リン
モノマー貯槽の構造を示す斜視図である。(3) Structure of a sealed pressure-resistant vacuum impregnation tank and storage tank FIG. 2 is a perspective view showing the structure of a vacuum impregnation tank which is a sealed pressure-resistant container, and FIG. 3 is a perspective view showing the structure of a phosphorus-containing monomer storage tank.
しこうして第２図、第３図に於て、５は外壁金属、６は
グラスファイバーのような断熱保温材、７は鉱物油のよ
うな熱媒体、８は１気圧に耐える構造強度の内壁金属、
９は熱媒中に入れたシーズヒーター １０は上蓋を示し
、更に第２図に於て１１はゴムのような真空用バッキン
グ、１２は上蓋を固定するためのボルトを示す。Thus, in Figures 2 and 3, 5 is an outer wall metal, 6 is a heat insulating material such as glass fiber, 7 is a heat medium such as mineral oil, and 8 is an inner wall metal with a structural strength that can withstand 1 atmosphere. ,
Reference numeral 9 indicates a sheathed heater placed in a heating medium; 10 indicates a top cover; further, in FIG. 2, 11 indicates a vacuum backing such as rubber; and 12 indicates a bolt for fixing the top cover.
（４）装置の構成と操作
第４図は真空含浸装置の構成を示す系統図であり、１３
は密閉耐圧性の真空含浸タンク、１４は真空ポンプでロ
ータリー型を使用する場合が多い、１５は含リンモノマ
ー貯槽、１６は含浸タンクと真空ポンプを接続する真空
配管の真空バルブ、１７は含浸タンクと貯槽を接続する
注入配管の真空バルブを示す。(4) Structure and operation of the device Figure 4 is a system diagram showing the structure of the vacuum impregnation device.
14 is a vacuum pump that is often of the rotary type; 15 is a phosphorus-containing monomer storage tank; 16 is a vacuum valve on the vacuum piping that connects the impregnation tank and the vacuum pump; 17 is an impregnation tank. The vacuum valve of the injection pipe connecting the tank and the reservoir is shown.
ポリエチレン連続気泡発泡体を厚さ数ミリから数十ミリ
にスライスした板状、又は棒状或は異形に裁断打抜きし
たものを、第４図１３の真空含浸タンクに入れ、第２図
１０の上蓋をかぶせ１２のボルトをしめて気密にした上
、１６．１７の真空バルブを閉じて、第４図１４の真空
ポンプを作動させて、ポリエチレン連続気泡発泡体中の
空気を除去した後、１７のバルブを開いて、１５の貯槽
から含リンモノマーを注入し、ポリエチレン連続気泡発
泡体の気泡中及び表面に含浸付着させる。A polyethylene open-cell foam sliced into a plate shape, a bar shape, or an irregularly shaped polyethylene foam with a thickness of several millimeters to several tens of millimeters is placed in the vacuum impregnation tank shown in Fig. 4 13, and the top lid shown in Fig. 2 10 is placed. After tightening the bolts of the cover 12 to make it airtight, close the vacuum valve 16.17, operate the vacuum pump shown in Fig. 4, 14, and remove the air in the open-cell polyethylene foam, and then close the valve 17. It is opened, and the phosphorus-containing monomer is injected from the 15 reservoir to impregnate and adhere to the cells and the surface of the open-cell polyethylene foam.
しかる後含浸タンクの上蓋１２を開き、含浸漬ポリエチ
レン連続気泡体を取り出し、電子線を照射する。Thereafter, the upper lid 12 of the impregnating tank is opened, the impregnated open polyethylene foam is taken out, and it is irradiated with an electron beam.
（５）製造条件
真空含浸タンクは内部温度が４０〜５０’Ｃで、水銀柱
が数ミリ以下になるまで、ポリエチレン連続気泡発泡体
を真空乾燥脱気し、含リンモノマーは貯槽で４０〜５０
″Ｃに加温した後注入含浸して、３０〜６０分後真空含
浸タンクを常圧にもどし、含浸漬ポリエチレン連続気泡
体を取出して、１００〜３００メガラドの電子線を照射
する。(5) Manufacturing conditions The vacuum impregnation tank has an internal temperature of 40 to 50'C, and the open-cell polyethylene foam is vacuum dried and degassed until the mercury column is less than a few millimeters.
After heating to "C" and injecting and impregnating, the vacuum impregnation tank is returned to normal pressure after 30 to 60 minutes, the impregnated polyethylene open cell is taken out and irradiated with an electron beam of 100 to 300 megarads.
以上に説明したように本願発明による、難燃化ポリエチ
レン連続気泡発泡体は焔を近ずけても全く引火せず、熱
による収縮軟化の変形を生じるのみで、不燃に近い、従
来全くなかった難燃性を具備し、かつ有害物質は何も発
生しない。As explained above, the flame-retardant polyethylene open-cell foam according to the present invention does not catch fire at all even when brought close to a flame, and only undergoes shrinkage and softening deformation due to heat, making it nearly non-flammable, something that has never existed before. It is flame retardant and does not emit any harmful substances.
加えて、ゲル分率測定で架橋度が９０％以上まで向上し
ており、８０°Ｃで連続、短時間では１００°Ｃに十分
耐える、従来望めなかった耐熱性が付与された。In addition, the degree of crosslinking was improved to over 90% when measured by gel fraction, and heat resistance that could not be expected in the past was provided, as it could withstand temperatures of 80°C continuously and 100°C for short periods of time.
本製法は以上のように極めて簡単で、かつポリエチレン
連続気泡発泡体製造後、二次的加工により全く新規な機
能が付加出来るので、品質が高度安定しており、非常に
経済的に多量に市場に供給することが出来る。As described above, this manufacturing method is extremely simple, and after producing open-cell polyethylene foam, completely new functions can be added through secondary processing, so the quality is highly stable and it is very economical and can be marketed in large quantities. can be supplied to
ポリエチレン連続気泡発泡体は軽量であると共に柔軟で
、その変形が任意であり、かつ吸音性能を持っており、
その上に不燃に近い難燃性と耐熱性向上の新機能が付加
されたので、従来から願望され近時益々その需要が増加
して来た、自動車、電気電子機器、コンピューター、航
空機、船舶、建築等の各産業分野に広く多量に実用され
る。Polyethylene open-cell foam is lightweight, flexible, deformable, and has sound absorption properties.
In addition, new features have been added to improve flame retardancy and heat resistance, which has long been desired and demand has increased in recent years for automobiles, electrical and electronic equipment, computers, aircraft, ships, etc. It is widely used in large quantities in various industrial fields such as architecture.
第１図はポリエチレン連続気泡発泡体の断面図、第２図
は密閉耐圧容器である真空含浸タンクの斜視図、第３図
は含リンモノマー貯槽の斜視図、第４図は真空含浸装置
の系統図である。
図中１・・・ポリエチレン連続気泡発泡体のスライスさ
れた表面、２・・・架橋ポリエチレン樹脂気泡膜、３・
・・気泡、４・・・気泡膜を破り連続気泡として繋って
いる大部分、５・・・外壁金属、６・・・断熱保温材、
７・・・熱媒体、８・・・内壁金属、９・・・シーズヒ
ーター １０・・・上蓋、１１・・・バッキング、１２
・・・ボルト、１３・・・真空含浸タンク、１４・・・
真空ポンプ、１５・・・貯槽、１６．１７・・・真空バ
ルブ
をそれぞれ示す。Figure 1 is a cross-sectional view of a polyethylene open-cell foam, Figure 2 is a perspective view of a vacuum impregnation tank, which is a sealed pressure-resistant container, Figure 3 is a perspective view of a phosphorus-containing monomer storage tank, and Figure 4 is a system of the vacuum impregnation equipment. It is a diagram. In the figure, 1...Sliced surface of polyethylene open cell foam, 2...Crosslinked polyethylene resin cell membrane, 3...
... air bubbles, 4... the majority of the cells that have broken the cell membrane and are connected as open cells, 5... the outer wall metal, 6... the heat insulating material,
7... Heat medium, 8... Inner wall metal, 9... Sheathed heater 10... Upper lid, 11... Backing, 12
...Bolt, 13...Vacuum impregnation tank, 14...
A vacuum pump, 15...a storage tank, and 16.17...a vacuum valve are shown, respectively.
Claims (2)
ノマーを、ポリエチレン連続気泡発泡体に真空又は減圧
或は加圧により、気泡の細部末端まで含浸充填し、含有
燐率を増加した上、毛細管まで該含リンモノマーが浸透
したポリエチレン連続気泡発泡体に電子線を照射し、該
モノマーを共重合すると共に該ポリエチレン連続気泡発
泡体の架橋度を増加して、ポリエチレン連続気泡発泡体
を難燃化し、かつ耐熱性も向上する、難燃化ポリエチレ
ン連続気泡発泡体の製造方法。(1) A phosphorus-containing monomer that is copolymerizable with a vinyl monomer is impregnated into a polyethylene open-cell foam to the fine ends of the cells by vacuum, reduced pressure, or pressurization to increase the phosphorus content, and The open-cell polyethylene foam, in which the phosphorus-containing monomer has permeated to the capillary tubes, is irradiated with an electron beam to copolymerize the monomer and increase the degree of crosslinking of the open-cell polyethylene foam, making the open-cell polyethylene foam flame retardant. A method for producing flame-retardant polyethylene open-cell foam that has improved heat resistance and improved heat resistance.
ような密閉耐圧性ある容器に入れ、該密閉耐圧性容器に
連結した真空ポンプによって、容器内の空気を排除し、
ポリエチレン連続気泡発泡体の空気部を真空又は減圧に
した上、密閉耐圧性容器に連結した含リンモノマー貯槽
から含リンモノマーを密閉耐圧性容器に注入し、ポリエ
チレン連続気泡発泡体に該含リンモノマーを含浸し、し
かる後、該密閉耐圧性容器の真空ポンプを止めて容器中
を常圧にもどす、或は、再び真空ポンプを作動させて真
空又は減圧にし、含リンモノマーを再注入する如き、真
空減圧→含リンモノマー注入→常圧のサイクルを繰返す
ことの出来る装置。(2) Place the open-cell polyethylene foam in a sealed pressure-resistant container such as a vacuum impregnation tank, and remove the air in the container using a vacuum pump connected to the sealed pressure-resistant container;
After the air portion of the open-cell polyethylene foam is evacuated or under reduced pressure, a phosphorus-containing monomer is injected into the closed pressure-resistant container from a phosphorus-containing monomer storage tank connected to a closed pressure-resistant container, and the phosphorus-containing monomer is added to the open-cell polyethylene foam. After that, the vacuum pump of the sealed pressure-resistant container is stopped to return the inside of the container to normal pressure, or the vacuum pump is operated again to create a vacuum or reduced pressure, and the phosphorus-containing monomer is reinjected. A device that can repeat the cycle of vacuum depressurization → phosphorus-containing monomer injection → normal pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3222090A JPH03234742A (en) | 1990-02-13 | 1990-02-13 | Method and apparatus for producing flame-retardant open-cell polyethylene foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3222090A JPH03234742A (en) | 1990-02-13 | 1990-02-13 | Method and apparatus for producing flame-retardant open-cell polyethylene foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03234742A true JPH03234742A (en) | 1991-10-18 |
Family
ID=12352860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3222090A Pending JPH03234742A (en) | 1990-02-13 | 1990-02-13 | Method and apparatus for producing flame-retardant open-cell polyethylene foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03234742A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009113366A (en) * | 2007-11-07 | 2009-05-28 | Kanayama Kasei Kk | Manufacturing method of liquid receiving container |
| CN106584857A (en) * | 2016-11-28 | 2017-04-26 | 上海航天精密机械研究所 | Vacuum resin-infiltrating device for 3D printed polystyrene part |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54111576A (en) * | 1978-02-17 | 1979-08-31 | Imuhemi Kuntsutofu Gmbh | Method of reinforcing porous material |
| JPH0222317A (en) * | 1988-07-11 | 1990-01-25 | Japan Atom Energy Res Inst | Modification of open cell foam of polyolefin |
| JPH02215844A (en) * | 1989-02-17 | 1990-08-28 | Japan Atom Energy Res Inst | Preparation of flame-retardant crosslinked polyolefin open-cell foam |
-
1990
- 1990-02-13 JP JP3222090A patent/JPH03234742A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54111576A (en) * | 1978-02-17 | 1979-08-31 | Imuhemi Kuntsutofu Gmbh | Method of reinforcing porous material |
| JPH0222317A (en) * | 1988-07-11 | 1990-01-25 | Japan Atom Energy Res Inst | Modification of open cell foam of polyolefin |
| JPH02215844A (en) * | 1989-02-17 | 1990-08-28 | Japan Atom Energy Res Inst | Preparation of flame-retardant crosslinked polyolefin open-cell foam |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009113366A (en) * | 2007-11-07 | 2009-05-28 | Kanayama Kasei Kk | Manufacturing method of liquid receiving container |
| CN106584857A (en) * | 2016-11-28 | 2017-04-26 | 上海航天精密机械研究所 | Vacuum resin-infiltrating device for 3D printed polystyrene part |
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