JPS58122935A - Preparation of foamed bead - Google Patents

Abstract

PURPOSE:To prepare foamed beads capable of being molded at low temp. and press., with little steam consumption and a high productivity, by blending a treating agent for reducing cooling time and a plasticizer with polystyrene beads. CONSTITUTION:About 75pts.wt. treating agent for reducing cooling time (e.g., liq. paraffin), about 25pts.wt. plasticizer (e.g., dibutyl phthalate), and about 7.5pts.wt. solvent (e.g., 2-ethylhexanol) are mixed together. About 0.5pts.wt. resulting soln. is blended with 100pts.wt. polystyrene beads impregnated with a foaming agent, and the obtd. compsn. is subjected to foam-molding.

Description

【発明の詳細な説明】 本発明は、ポリス−１−レン系発泡ピースの成型時に於
ｌ）る省エネルギー、商生産性効果を得ることを目的と
した発泡ヒースの製造方法に関するもので決）る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing foam heather with the aim of achieving energy saving and commercial productivity effects during molding of poly-1-rene foam pieces. .

ポリスチレン糸発泡ピースの成型時の生産ｖトを向」−
さＵろ目的で、冷】、１１時間を短縮する処理剤を使用
することは、既に公知であり、パラフィン油、ポリエチ
レンワソクヌ、脂肪酸アミｌ”Ｊｆｉ　、ＢＨ肪族γミ
ノ頗、金属石ケン等、数多くのものが１に案さ４１、実
用に供されているが、それらは、ヒースの融着性をド■
害する傾向がある為、成型時に於て高温高圧を要し、離
型温度を高く出来るメリッ１があっ゛（も、ン日）ｌ当
りの蒸気使用量はｉｊｔ来と大差ないのが実情である。Direction of production during molding of polystyrene thread foam pieces
It is already known to use processing agents that shorten the cooling time for the purpose of filtration, such as paraffin oil, polyethylene wax, fatty acid amyl, BH aliphatic gamma amino acid, and metal soap. A number of such methods have been proposed in 141 and put into practical use;
Because of this, high temperature and pressure are required during molding, which has the advantage of being able to raise the mold release temperature.The reality is that the amount of steam used per liter is not much different from before. .

これら処理剤の作用は、成型時に於ける一二次発泡圧の
制御であり、処理剤で処理された発泡粒子表面にピンホ
ールが生じ゛（いることが判明しているが、−・般に処
理剤は、ポリスチレンとの相溶ヤ■は余り良くなく、可
塑性を付与する作用が全＜　ｆ、ｘいことがビーズの融
着性を＋＋ｎ害する原因でもある。従って、これらの処
理剤にヒースの可咽性を付〜１れば、低温低圧成型が可
能となり、ン日ソ１当りの蒸気使用量も少なく、史にサ
イクルγノプし得ることは明らかであり、後述の本発明
実施１列の如く実現出来ることが判明しＩ、：。ｙ、懸
念される予備発泡時のブロッキングの発生に−）い−（
も、全く問題のないものが得られるごとも判明しｆ、：
。The action of these processing agents is to control the primary and secondary foaming pressure during molding, and pinholes are formed on the surface of the foamed particles treated with the processing agents, but generally... Treatment agents are not very compatible with polystyrene, and the fact that their plasticity-imparting effect is less than f, x is also the cause of impairing the fusion properties of the beads. It is clear that if the pharyngeability of ~1 is achieved, low-temperature, low-pressure molding becomes possible, the amount of steam used per unit of steam is small, and it is possible to repeat the cycle γ, which will be described later. It turns out that it is possible to achieve the same results as shown in the table below.
It also turns out that you can get something with no problems at all.
.

本発明に於ける冷却時間を短縮する処理剤は、前記のも
のの他、メタン列炭化水素、ナフテン類、及びそれらの
誘導体で比較的不活性で５　（１’Ｃ以しσ・ｉ 」、の沸点を有しｎつポリスチレン系を溶解銖ミものを
包含し、可塑剤は、ポリスチレン糸の溶剤となるもの総
てを含み、相溶さυる溶剤は、処理剤と可塑剤を相溶し
得るものであれば良い。然し乍ら、ビーズの予備発泡や
成型時に蒸気を使用する関係上、これらの混合した溶液
は余り親水性を持たない〕Ｊが望ましい。In addition to the above-mentioned processing agents, the processing agents for shortening the cooling time in the present invention include methane group hydrocarbons, naphthenes, and derivatives thereof, which are relatively inert and have a The plasticizer includes all solvents that have a boiling point that dissolve polystyrene, and the plasticizer includes all solvents that can be used as a solvent for the polystyrene thread. However, because steam is used during pre-foaming and molding of beads, a mixed solution of these does not have much hydrophilicity.] J is desirable.

以下、本発明の好適実施例を説明′４る。Preferred embodiments of the present invention will be described below.

０）使用ビーズ 湘南積水工業０１製　ＭＣ３ （２）混合溶液の配合比（ｕＬ財部） 流動パラフィン・・・７５、フタル酸ブー１−ル・・・
２５．２−エチルヘキサノール・・・７．５（２））ビ
ーズに幻４６混合溶液の添加量（田星部）ビー〕１・・
＋００、混合溶液・・・０．５（４）使用成型機 積水下機（株制　Ａ　Ｏ１尤−ＩＩＩ　　Ｉζ５（５）
予備発泡イイ５率 ５４倍 （６）実ｈｌ！１力法 枦め所定割合のピース−と混合溶ｉ＆を良くブレン１′
シたものを、Ｙ・偏発泡機で予備発泡し１．１２時間熟
成後、成型を行った。尚、予備発泡時に於けるブロッキ
ングは、全くなかった。0) Beads used manufactured by Shonan Sekisui Kogyo 01 MC3 (2) Blend ratio of mixed solution (uL Taibe) Liquid paraffin...75, phthalic acid boolean...
25.2-Ethylhexanol...7.5(2)) Addition amount of Gen 46 mixed solution to beads (Tasebe) Bee] 1...
+00, mixed solution...0.5 (4) Used molding machine water drop machine (stock system A O1-III Iζ5 (5)
Pre-foaming good 5 rate 54 times (6) Actual HL! 1. Mix the pieces in the specified ratio with the 1st force method and blend well.
The resulting product was pre-foamed using a Y-shaped foamer, aged for 1.12 hours, and then molded. Furthermore, there was no blocking at all during the preliminary foaming.

（７）結果 表１に成型性及び他朽品との比較結果を記載する。成型
性を比較した他社品は、国内−・流メーカーが現在市販
中のポリスチレン系ハイサイクルビーズで、優れたもの
であり、ブランクのものに１ヒ較し′（、平均３０％り
十のサイクルアップの性能である。尚、表中に於°（、 成型条ＪＡ１４′ｔ、 蒸気圧・・・４．５ｋｇ／ｃＪ、金型加熱・・・２秒、
リノ加熱（Ｊ丁）・・・０　、　３　ｋｇ／　ｃＪ、両
面加熱・・５秒成型条性２は、 蒸気圧・・・３　ｋｇ　／　ｃａ、金型加熱・・・１秒
、一方加熱（圧）・・・０　、　２　ｋｇ　／　ｃＩδ
、両面加熱・・・５秒である。(7) Results Table 1 shows the moldability and comparison results with other obsolete products. The moldability of other companies' products was compared with polystyrene-based high-cycle beads currently on the market from a domestic manufacturer. The performance of
Reno heating (J-cho)...0, 3 kg/cJ, double-sided heating...5 seconds Molding property 2: Steam pressure...3 kg/ca, mold heating...1 second, one-sided heating ( Pressure)...0, 2 kg/cIδ
, both sides heated for 5 seconds.

以上の如くであるが、注目Ｊべきは、上記成型条件に於
いての融着度であり、通常７０〜８０％以」−を必要と
するが、他社製品は肉厚：）ト分に於゛（不足し７、従
って本成型条件より高温高圧を必要とＪることが明白で
あり、融着度が高くなれば冷却サイクルが長くなるのは
明らか′ぐ、全サイクルも比例し“（長くなるので、本
発明との差は史に大きくなる。この比較からも、本発明
の融着物４！■（低渇低圧成型牲）及びサイクルアップ
８１Ｌ１７１屯幼が証明される。As mentioned above, what should be noted is the degree of fusion under the above molding conditions, which normally requires 70 to 80% or more, but other companies' products have a wall thickness of 70% to 80%. (7) Therefore, it is clear that higher temperature and pressure are required than the present molding conditions, and it is obvious that the higher the degree of fusion, the longer the cooling cycle, and the total cycle will be proportional. Therefore, the difference with the present invention is historically large. This comparison also proves that the fused product 4!■ (low dryness and low pressure moldability) and cycle up 81L171 ton of the present invention.

以上の他、ブロック成型機で９ｋｇブロック成型品の成
型テストを行ったが、ブランクの発泡ビーズで３５分の
サイクルを興したものが１本発明実施例のものは、１３
分２０秒であった。In addition to the above, we conducted a molding test of 9 kg block molded products using a block molding machine, and one of the products that produced a 35-minute cycle using blank foam beads was 13.
It was minutes and 20 seconds.

以１の実施例の他、２−−７．チルヘキサノールをブク
ノールやヘキサノール等、他のアルコールに代えること
も出来、又、ｎ−ヘキサンの様なメタン列炭化水素類の
内からも選択出来ることが判明しＩこ。In addition to Example 1 below, 2--7. It has been found that tylhexanol can be replaced with other alcohols such as bukunol and hexanol, and can also be selected from methane series hydrocarbons such as n-hexane.

更に、処理剤と可塑剤、及び相溶させる溶剤の配合量を
変化さケ°（も、夫々特徴のあるものが得られる。可塑
剤が全体の３０％を越えると、予備発泡時のブロッキン
グが生じ昌くなる傾向にあるが、可塑剤を選択すること
により、より多くの配合が可能となる。又、相溶させる
溶剤の性質が処理剤に近いか可塑剤に近いかによっても
、その添加■の増加によって、近いものの方の効果が強
化されることは当然である。因に、流動パラフィン４０
部、２−エチルヘキサノール４０６Ｂ、フタル酸ブチル
２０部の配合では、サイクルアップの性能がＭｉｌ記実
施例より強くなるし、６１記実施例に於ける２−エチル
ヘキサノールに代え°（、シクロヘキサ／−ルを同門使
用すれば、融着性が強化されることは、相溶させる溶剤
自体が処理剤又は可塑剤になることを示し゛（いる。Furthermore, by changing the blending amounts of the processing agent, plasticizer, and solvent for making them compatible (each with its own characteristics can be obtained), if the plasticizer exceeds 30% of the total, blocking during pre-foaming may occur. However, by selecting a plasticizer, it is possible to mix more.Also, depending on whether the properties of the solvent to be made compatible are close to that of the processing agent or the plasticizer, its addition It is natural that the effect of the similar one will be strengthened by increasing .Incidentally, liquid paraffin 40
By blending 20 parts of 2-ethylhexanol 406B and 20 parts of butyl phthalate, the cycle-up performance is stronger than that of Example 61, and instead of 2-ethylhexanol in Example 61, The fact that the fusion properties are enhanced when the same solvent is used indicates that the solvent used to make the solvent compatible becomes a treating agent or a plasticizer itself.

Claims (1)

【特許請求の範囲】 ０発泡剤を含浸したポリスチレン系ヒースに、冷却時間
を短縮する処理剤と可塑剤、及びそれらを相溶さＵｏる
溶剤を混合した溶液を、鼻基蒜素添加ずろことを特徴と
する発泡ピースの！Ｉ＋’！　造７Ｊ法。 ■前記冷却時間を短縮する処理剤を、流動パラフィン或
いはパラフィン油とする、特＋！’ｉ請５Ｐ、の範囲■
項記載の方法。 ■前記可塑剤を、フタル酸エステルとする、特凸納シ）
乏の範囲■項又は■項記載の方法。 ■１１１ｆ記相溶させる溶剤を、アルコール又はメタン
列炭化水素とする、４１ｒ凸詰）ｋの範囲（０項・〜■
項の何れかに記載の）Ｊ法。[Claims] A solution containing a treatment agent and a plasticizer that shorten the cooling time, and a solvent that makes them compatible is added to polystyrene heather impregnated with a foaming agent. Of foam pieces featuring! I+'! Construction 7J method. ■The processing agent that shortens the cooling time is liquid paraffin or paraffin oil.Special +! 'I request 5P, range■
The method described in section. ■The plasticizer used is a phthalate ester (Special confectionery)
Scope of scarcity Item ■ or method described in Item ■. ■111f The solvent to be compatible is alcohol or methane series hydrocarbon, 41r convex) range of k (0 terms...■
(described in any of the paragraphs) J method.