JPS6319233A - Preparation of plastic foam - Google Patents
Preparation of plastic foamInfo
- Publication number
- JPS6319233A JPS6319233A JP61163094A JP16309486A JPS6319233A JP S6319233 A JPS6319233 A JP S6319233A JP 61163094 A JP61163094 A JP 61163094A JP 16309486 A JP16309486 A JP 16309486A JP S6319233 A JPS6319233 A JP S6319233A
- Authority
- JP
- Japan
- Prior art keywords
- pressure medium
- pressure
- container
- inlet
- heating
- 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
- 239000002984 plastic foam Substances 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000006260 foam Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000006261 foam material Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 2
- 239000002985 plastic film Substances 0.000 abstract description 2
- 229920006255 plastic film Polymers 0.000 abstract description 2
- 238000005187 foaming Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000004604 Blowing Agent Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 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
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/10—Applying counter-pressure during expanding
- B29C44/105—Applying counter-pressure during expanding the counterpressure being exerted by a fluid
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野ン 本発明はプラスチック発泡体の製造法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing plastic foam.
（従来の技術）
プラスチック発泡体はまずプラスチック基材に発泡剤を
市加し混練した後、押出工程で直接発泡体を得ろ方法及
び押出シート成形により原反を作成し、その後、加熱発
泡させる方法が採られる。後者は架橋反応により、高発
泡倍率、微細気泡を得る方法であり、加熱発泡は熱気炉
内７０−ティング方式等に依っ℃いる。(Prior art) Plastic foams are produced by first adding a foaming agent to a plastic base material, kneading it, and then directly obtaining the foam in an extrusion process; or creating a raw material by extrusion sheet molding, and then heating and foaming it. is taken. The latter is a method of obtaining a high expansion ratio and fine bubbles through a crosslinking reaction, and heating foaming is carried out in a hot air oven at 70°C.
（発明が解決しようとする問題点ノ
ー股に高倍率の発泡シートは原反を架橋反応、発泡の順
で加熱処理する。しかし発泡は、常圧もしくはそれに近
い低圧状態で進むため、局部発泡、気泡サイズの不揃い
は避けられない。特にシートの両！ＩＩ、はこの堝象が
顕著であり、歩留を低下させている。(Problems to be Solved by the Invention) For high-magnification foam sheets, the original fabric is heat-treated in the order of crosslinking reaction and foaming.However, foaming proceeds at normal pressure or a low pressure close to it, so local foaming, Inconsistency in bubble size is unavoidable.This phenomenon is particularly noticeable on both sides of the sheet and reduces the yield.
本発明は均一な発泡が行なわれるプラスチック発泡体の
製造法を提供するものである。The present invention provides a method for producing a plastic foam that is uniformly expanded.
（問題点を解決するための手段〉
本発明は浴融した圧力媒体を封じ込めた圧力容器にベル
トに挟まれた発泡素材を送り込み、加熱加圧し、再びこ
の圧力容器から、連続的に引き出すことにより発泡体を
形電するものである。(Means for Solving the Problems) The present invention involves feeding a foamed material sandwiched between belts into a pressure vessel containing a bath-molten pressure medium, heating and pressurizing it, and continuously drawing it out from the pressure vessel again. This is to transform the foam into a form of electricity.
圧力容器の入口、および出口は、圧力媒体が固化する温
度まで冷却し、内圧をシールする。The inlet and outlet of the pressure vessel are cooled to a temperature at which the pressure medium solidifies, sealing the internal pressure.
この圧力容器内部、および入口では発泡素材１２、上下
左右から圧力媒体１ｃよる圧力が加わり、発泡素材は均
一＠度に発泡される。Inside this pressure vessel and at the inlet, pressure from the pressure medium 1c is applied to the foamed material 12 from above, below, left and right, and the foamed material is foamed uniformly.
まアこ入口では、圧力媒体の溶融加圧部から固化してシ
ール部を構成する部分の間には入口から徐々に圧力が上
昇し、溶融部に達して、設定した成形圧となる。At the inlet of the hole, the pressure gradually increases from the inlet between the melted pressurized part of the pressure medium and the part that solidifies to form the seal part, reaches the melted part, and becomes the set molding pressure.
この設定圧力と昇温条件を組み合せろことにより、所望
の密度、厚みの発泡体が得られる。By combining this set pressure and temperature increase conditions, a foamed product with desired density and thickness can be obtained.
このような加圧に通した圧力媒体としてをエワックス類
、低融点熱可塑性樹脂、パラフィン等があげられろ。Examples of the pressure medium that can be subjected to such pressurization include e-waxes, low-melting thermoplastic resins, paraffin, and the like.
第２図は不発明に便用される装置の概略を示す斜視図で
ある。１０１は上方圧力容器、１０２は下方圧力容器で
これらを締結し℃圧力容器１０３を構成する。圧力容器
１０６の中央部の加熱部１０４の内部には溶融液状の圧
力媒体が収納されるようになっており、発泡素材１０５
は金属板、プラスチックフィルム等の一対のエンドレス
ベルトとなっているシート状物に上下を挟まれて入口か
ら出口にかけ″′Ｃ浴融液状の圧力媒体中を移動する。FIG. 2 is a perspective view schematically showing a device useful for the invention. 101 is an upper pressure vessel, 102 is a lower pressure vessel, and these are fastened together to constitute a °C pressure vessel 103. A molten liquid pressure medium is stored inside the heating section 104 in the center of the pressure vessel 106 , and the foamed material 105
is sandwiched at the top and bottom by a pair of endless belts of sheet-like materials such as metal plates or plastic films, and moves in a pressure medium in the form of C bath melt from the inlet to the outlet.
１０６は溶融液状の圧力媒体の加圧機構でありここから
溶融液状のｍ圧媒体を注入し圧力媒体には圧力をかけ発
泡素材１０５を工圧力媒体中を移動する関知加熱加圧さ
れて発泡体となる。１０７，１０８はそれぞれ入口、出
口の冷却部であり、ここて溶融液状の圧力媒体を工冷却
固化し、自己シールが行なわれろ、入口、出口の冷却９
１０７，１０８ではシート状物で挟まれた発泡素材は固
化した圧力媒体に接しながら移動する。冷却部の長さは
加圧媒体の種類によっても異なるが封正に必要な長さが
あれば良い。加熱、加圧部の加熱、冷却部の冷却は通常
の方法、例えば蒸気、冷却水ＶＣＬり行うことが出来る
。Reference numeral 106 denotes a pressurizing mechanism for a molten liquid pressure medium, from which a molten liquid m-pressure medium is injected, pressure is applied to the pressure medium, and the foam material 105 is moved through the pressure medium. becomes. 107 and 108 are inlet and outlet cooling parts, respectively, where the molten liquid pressure medium is mechanically cooled and solidified to perform self-sealing.
At 107 and 108, the foamed material sandwiched between the sheet-like materials moves while coming into contact with the solidified pressure medium. The length of the cooling section varies depending on the type of pressurized medium, but it is sufficient as long as it has the length necessary for sealing. Heating, heating of the pressurizing section, and cooling of the cooling section can be carried out by conventional methods, such as steam or cooling water VCL.
第１図は本発明の方法を示す断面図である。FIG. 1 is a cross-sectional view showing the method of the invention.
発泡素材１０５は圧力媒体の溶融域１０４にて、上、下
、左右から均一加圧される。シート発泡圧と加圧力との
つり合いで、密度、厚みが決まり端部まで均一な発泡体
が得られる。The foamed material 105 is uniformly pressurized from above, below, left and right in the melting region 104 of the pressure medium. The density and thickness are determined by the balance between the sheet foaming pressure and the pressing force, and a foam that is uniform all the way to the edges can be obtained.
出口冷却部は開口寸法はシート及びエンドレスベルトの
総厚み以上に広げておけば良く、そのすき間Ｅ工面化し
た圧力媒体で光填されており、固体潤滑の作用も持たせ
ることができる。The opening of the outlet cooling section should be wider than the total thickness of the sheet and the endless belt, and the gap is optically filled with an E-shaped pressure medium, so that it can also have a solid lubrication effect.
エンドレスベルト１１０と基材との間にラミネートシー
ト１０９を挟めば一工程でラミネートされた発泡体を得
ろことができる。By sandwiching the laminate sheet 109 between the endless belt 110 and the base material, a laminated foam can be obtained in one step.
尚、発泡に先立ってプラスチック基材の架橋が必要であ
れば、発泡素材が本発明の加熱加圧装置に入る前に架橋
させておくか、発泡素材が加熱、加圧製電に入った後で
発泡反応前に架橋反応が行なわれろような架橋剤を使用
すれば良い。If it is necessary to cross-link the plastic base material prior to foaming, it may be cross-linked before the foam material enters the heating and pressurizing device of the present invention, or after the foam material enters the heating and pressurizing device. It is sufficient to use a crosslinking agent that allows the crosslinking reaction to occur before the foaming reaction.
プラスチック基材としてポリエチレン、ポリプロピレン
、発泡剤としてアゾジカルボンアミドを使用した場合は
、加熱、加圧は、１５０〜２００℃、２０〜５０ｋｇ／
ａｎ”、プラスチック基材としてポリスチレン、発泡剤
としてプロパン、ペンタンを使用した！ｌｈ会は、加熱
、加圧は、１１０〜１２０℃、２０〜５０ｋｇ／ａｌｌ
＋で行い倍率１．５程度の発泡体を得、このあとオープ
ン加熱等により倍率２０〜５０の緻密な発泡体とする。When polyethylene or polypropylene is used as the plastic base material and azodicarbonamide is used as the blowing agent, heating and pressurization are performed at 150 to 200°C and 20 to 50 kg/
An'', polystyrene was used as the plastic base material, and propane and pentane were used as the blowing agents.Heating and pressurization were performed at 110-120℃ and 20-50kg/all.
+ to obtain a foam with a magnification of about 1.5, and then by open heating etc. to form a dense foam with a magnification of 20 to 50.
プラスチック基材としてノボラックフェノール（硬化剤
を含む）、発泡剤としてジニトロソペンタメチレンテト
ラミンを使用した場合は、加熱、加圧は１５０〜２００
℃、１〜５ｋｇ／ａｆで行い、倍率２〜３倍の開発泡体
を得る。When using novolak phenol (including curing agent) as the plastic base material and dinitrosopentamethylenetetramine as the blowing agent, the heating and pressurizing temperature is 150 to 200.
℃ and 1 to 5 kg/af to obtain a developed foam with a magnification of 2 to 3 times.
発泡素材としＣ（エシート状の連続したもののみでなく
、適当な長さに切断した不連続のものも使用出来る。Foam material C (not only continuous sheets but also discontinuous ones cut into appropriate lengths can be used).
（発明の効果） 本発明に工り次の効果が達成される。(Effect of the invention) The present invention achieves the following effects.
（１）智度、厚みの均一発泡体が得られ、端部不均一に
よるロスが少い。(1) A foamed product with uniform width and thickness is obtained, and there is little loss due to uneven edges.
（２） ラミネートシート付σ）発泡体体が一工程で
得られる。(2) σ) Foamed body with laminated sheet can be obtained in one step.
（５）原反の継ぎ目作莱はベル）Ｋ挟んで送るだけであ
り、装置の運転が安定する。(5) The seam of the original fabric is simply fed by clamping it between the bells and K, which stabilizes the operation of the device.
第１図は本発明の方法を示す断面図、第２図は本発明Ｖ
Ｃ便用される装置を示す廚視図である。
符号の説明
１０３：圧力容器
１０５：発泡素材
ｔ０３ ｒｉ力容器FIG. 1 is a sectional view showing the method of the present invention, and FIG. 2 is a cross-sectional view showing the method of the present invention.
It is a front view showing the device used for C. Explanation of symbols 103: Pressure vessel 105: Foam material t03 RI force vessel
Claims (1)
内部に液体の圧力媒体が収納されるとともに圧力媒体を
冷却固化する冷却機構を備えた入口、および出口、並び
に液体の圧力媒体に圧力を加える加圧機構を有する圧力
容器内を移動させ、圧力媒体中で加熱加圧することを特
徴とするプラスチック発泡体の製造法。1. A foam material made by adding a foaming agent to a plastic base material.
The pressure medium is moved through a pressure vessel that houses a liquid pressure medium inside and has an inlet and an outlet equipped with a cooling mechanism that cools and solidifies the pressure medium, and a pressurization mechanism that applies pressure to the liquid pressure medium. A method for producing plastic foam, which is characterized by heating and pressurizing it inside a foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163094A JPS6319233A (en) | 1986-07-11 | 1986-07-11 | Preparation of plastic foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163094A JPS6319233A (en) | 1986-07-11 | 1986-07-11 | Preparation of plastic foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6319233A true JPS6319233A (en) | 1988-01-27 |
Family
ID=15767066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61163094A Pending JPS6319233A (en) | 1986-07-11 | 1986-07-11 | Preparation of plastic foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6319233A (en) |
-
1986
- 1986-07-11 JP JP61163094A patent/JPS6319233A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2503753B2 (en) | Molding method of polypropylene resin molded body to which skin material lined with foaming layer is laminated | |
| KR920003061B1 (en) | Method and apparatus for extruding a foamed thermo plastic material having an integral non-porous skin | |
| US5178708A (en) | Method for producing multi-layer molded article | |
| US3919446A (en) | Process for expanding thermoformable materials and products | |
| US2899708A (en) | Modification and control of plastic | |
| JPH04144721A (en) | Molding method of polypropylene-resin foam molded form | |
| JPH0623857A (en) | Method for forming resin substrate made of foamable core material and one or more coating layers | |
| JPS6319233A (en) | Preparation of plastic foam | |
| JP3572823B2 (en) | Method for producing fiber-reinforced thermoplastic resin molded article | |
| JPH09216273A (en) | Production of thermoplastic resin foamed sheet having skin layer | |
| JP2005313590A (en) | Method for manufacturing thermoplastic resin molded article | |
| JPS5953855B2 (en) | Method for manufacturing a laminate molded product | |
| GB1358932A (en) | Manufacture of urethane foam sheets | |
| JPH0222031A (en) | Vacuum molding of both sides of laminated sheet | |
| JP2023160451A (en) | Method for producing gradient foamed molding | |
| JP2634263B2 (en) | Method for producing olefin-based resin open-cell foam | |
| JPS6330140B2 (en) | ||
| JP2787214B2 (en) | Method for producing composite foam | |
| JPS5731297A (en) | Speaker diaphragm and its production | |
| JPH04179521A (en) | Manufacture of composite molded form | |
| JPS6271628A (en) | Manufacture of band-shaped form or form mat, which mainly consist of polymer material and can be laminated directly | |
| JP2813935B2 (en) | Molding method of molded article having irregularities | |
| JPH05154931A (en) | Apparatus for manufacturing foamed article | |
| JPS63209925A (en) | Manufacture of laminated interior finish plate for vehicle | |
| JPH01178418A (en) | Compression molding |