JPH03221543A - Additive coating method for pre-expanded beads - Google Patents
Additive coating method for pre-expanded beadsInfo
- Publication number
- JPH03221543A JPH03221543A JP1839790A JP1839790A JPH03221543A JP H03221543 A JPH03221543 A JP H03221543A JP 1839790 A JP1839790 A JP 1839790A JP 1839790 A JP1839790 A JP 1839790A JP H03221543 A JPH03221543 A JP H03221543A
- Authority
- JP
- Japan
- Prior art keywords
- additive
- particles
- expanded
- resin particles
- antistatic agent
- 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
- 239000000654 additive Substances 0.000 title claims abstract description 47
- 230000000996 additive effect Effects 0.000 title claims abstract description 31
- 238000000576 coating method Methods 0.000 title abstract description 6
- 239000011324 bead Substances 0.000 title abstract description 5
- 239000002216 antistatic agent Substances 0.000 claims abstract description 30
- 238000000465 moulding Methods 0.000 claims abstract description 11
- 239000004094 surface-active agent Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 73
- 239000011347 resin Substances 0.000 claims description 44
- 229920005989 resin Polymers 0.000 claims description 44
- 238000005187 foaming Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000003086 colorant Substances 0.000 claims description 2
- 239000003607 modifier Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 3
- 239000012508 resin bead Substances 0.000 abstract 3
- 238000013019 agitation Methods 0.000 abstract 1
- 239000003623 enhancer Substances 0.000 abstract 1
- 239000006260 foam Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000004088 foaming agent Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は予備発泡粒子の表面に添加剤を塗布する方法に
関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of applying additives to the surface of pre-expanded particles.
発砲ポリスチレンを始めとする発泡性樹脂粒子により発
泡成形体を成形するのに際し、帯電防止剤などの添加剤
が添加されて、樹脂粒子の表面に塗布されてから成形さ
れる場合が多い、従来の添加剤の塗布方法を帯電防止剤
を例に説明する。When molding foam molded products using foamed resin particles such as foamed polystyrene, additives such as antistatic agents are often added and applied to the surface of the resin particles before molding. The method for applying the additive will be explained using an antistatic agent as an example.
発泡剤が含浸された固形の樹脂粒子に所定量の粉末状の
帯電防止剤が添加され攪拌されて、帯電防止剤が発泡性
樹脂粒子の表面に付着させられている。その発泡性樹脂
粒子は成形工場などに輸送され、成形工場の予備発泡槽
で予備発泡させ、その後一定時間養生させた後、その予
備発泡粒子が金型内に入れられて所定の形状に発泡成形
されている。A predetermined amount of powdered antistatic agent is added to solid resin particles impregnated with a foaming agent and stirred, so that the antistatic agent is attached to the surface of the expandable resin particles. The expandable resin particles are transported to a molding factory, etc., where they are pre-foamed in a pre-foaming tank at the molding factory, and then cured for a certain period of time, after which the pre-expanded particles are put into a mold and foam-molded into a predetermined shape. has been done.
ところが、輸送中に帯電防止剤が発泡性樹脂粒子の表面
から剥がれ落ちたり偏ってしまう等の現象により、付着
させられた帯電防止剤の濃度にばらつきが生していた。However, due to phenomena such as the antistatic agent peeling off from the surface of the expandable resin particles or becoming uneven during transportation, the concentration of the antistatic agent deposited varies.
しかも、輸送されてきた発泡性樹脂粒子を貯留タンクか
ら予備発泡槽に移送するため真空吸引により発泡性樹脂
粒子が吸い上げられたとき、発泡性樹脂粒子（こ付着さ
せられた帯電防止剤が分離してフィルターに吸着されて
しまい、所定の添加量を添加しているにもかかわらず、
実際には必要量を添加できていないという問題があった
。更に、帯電防止剤を所定量添加攪拌して成形工場に出
荷している現状では添加量のランクに応して在庫を確保
しておく必要がある。Moreover, when the foamed resin particles are sucked up by vacuum suction in order to transfer the transported foamed resin particles from the storage tank to the pre-foaming tank, the antistatic agent attached to the foamed resin particles separates. and is adsorbed by the filter, and even though the specified amount is added,
In reality, there was a problem that the required amount could not be added. Furthermore, in the current situation where a predetermined amount of antistatic agent is added and stirred before being shipped to a molding factory, it is necessary to maintain inventory according to the rank of the amount added.
方、成形工場としても帯電防止剤の添加量を随時変更す
ることができず、需要の変更に直ちに対応できなかった
。On the other hand, as a molding factory, it was not possible to change the amount of antistatic agent added at any time, and it was not possible to immediately respond to changes in demand.
そこで、予備発泡槽内で発泡性樹脂粒子に添加剤を添加
する方法が望まれており、そのような方法の一つとして
、特公昭６２−６５７８号公報は発泡性ポリスチレン系
樹脂粒子を、予備発泡するスチームで霧化した処理剤に
よって、予備発泡槽内でコーティングする技術を開示し
ている。しかし、この方法は処理剤を予備発泡させるス
チームで霧化するものであるため、固体の処理剤は予め
その処理剤を？８′ｅ、化させる必要があり、しかも溶
液化するための溶媒を予備発泡粒子から揮発あるいは遺
散させる工程を必要とし、製造コストを上昇させるもの
であった。また、溶媒の選択についても発泡性樹脂粒子
を侵さないものを選ぶ必要もあった。更に、処理剤の添
加量を調整するのに、溶液化された処理剤の濃度と供給
量の２つの要素を調整する必要があり、実用上操作が面
倒であった。Therefore, a method of adding additives to expandable resin particles in a pre-expanding tank is desired. Discloses a technique of coating in a pre-foaming tank with a treatment agent atomized by foaming steam. However, since this method involves atomizing the processing agent with steam that pre-foams it, the solid processing agent must be pre-foamed with the processing agent. In addition, a step of volatilizing or dissipating the solvent for solution-forming from the pre-expanded particles is required, which increases the manufacturing cost. It was also necessary to select a solvent that would not attack the expandable resin particles. Furthermore, in order to adjust the amount of the processing agent added, it is necessary to adjust two factors, the concentration and the supply amount of the processing agent that has been made into a solution, which is troublesome in practice.
そこで、本発明者は上記問題を解決するため鋭意研究を
重ねた結果、本発明に至ったのである。Therefore, the present inventor conducted extensive research to solve the above problem, and as a result, the present invention was achieved.
本発明に係る予備発泡粒子の添加剤塗布方法の要旨とす
るところは、発泡性樹脂粒子を加熱して予備発泡させ予
備発泡粒子を製造する方法において、予備発泡槽内に発
泡性樹脂粒子と粉末状の添加剤とを投入し、攪拌させな
がら該発泡性樹脂粒子を予備発泡させて、該予備発泡さ
せられた予備発泡粒子の表面に添加剤を塗布又は融着さ
せることにある。The gist of the method for applying additives to pre-expanded particles according to the present invention is that in a method for producing pre-expanded particles by heating and pre-foaming expandable resin particles, expandable resin particles and powder are placed in a pre-expanding tank. The purpose is to pre-foam the foamable resin particles while stirring, and apply or fuse the additives onto the surface of the pre-foamed particles.
また、かかる本発明の予備発泡粒子の添加剤塗布方法に
おいて、前記粉末状の添加剤がたとえば帯電防止剤その
他の界面活性剤、成形サイクル向上剤、ブロッキング防
止剤、着色剤又は改質剤であることにある。Further, in the additive coating method for pre-expanded particles of the present invention, the powdered additive is, for example, an antistatic agent or other surfactant, a molding cycle improver, an antiblocking agent, a coloring agent, or a modifier. There is a particular thing.
かかる本発明は予備発泡槽内に発泡性樹脂粒子と粉末状
の添加剤を投入して両者を均一に攪拌しながら発泡性樹
脂粒子を予備発泡させるとともに、その予備発泡させる
ための熱により添加剤は溶融させられ、予備発泡させら
れた予備発泡粒子の表面に塗布される。According to the present invention, foamable resin particles and powdered additives are put into a pre-foaming tank, and while both are uniformly stirred, the foamable resin particles are pre-foamed, and the additives are heated for pre-foaming. is melted and applied to the surface of the pre-expanded particles.
〔実施例］
次に、本発明の実施例を図面に基づいて詳しく説明する
。[Example] Next, an example of the present invention will be described in detail based on the drawings.
第１図において、符号１０は予備発泡機における予備発
泡槽であり、この予備発泡槽１０には貯留タンク１２に
貯留された発泡性樹脂粒子１４がサービスタンク１６及
び計量ホッパー１８を介して一定量送給されるようにさ
れている。In FIG. 1, reference numeral 10 indicates a pre-foaming tank in a pre-foaming machine, and a fixed amount of foamable resin particles 14 stored in a storage tank 12 are transferred to this pre-foaming tank 10 via a service tank 16 and a measuring hopper 18. It is arranged to be sent.
貯留タンク１２は樹脂粒子に発泡剤が含浸された発泡性
樹脂粒子１４を貯留しておくためのものであり、貯留タ
ンク１２に貯留された発泡性樹脂粒子１４は貯留タンク
１２内に挿入された吸引パイプ２０を介してオートロー
ダ−２２により吸弓されて、サービスタンク１６に一時
的に蓄えられる。発泡性樹脂粒子１４はポリスチレンあ
るいはポリエチレンやポリプロピレン等のポリオレフィ
ン等、ビーズ型内成形に適した樹脂が用いられ、その樹
脂がほぼ均一な粒子に成形され且つブタン等の発泡剤が
含浸させられたものである。The storage tank 12 is for storing foamable resin particles 14 in which resin particles are impregnated with a foaming agent, and the foamable resin particles 14 stored in the storage tank 12 are inserted into the storage tank 12. It is sucked up by the autoloader 22 via the suction pipe 20 and temporarily stored in the service tank 16. The foamable resin particles 14 are made of a resin suitable for molding in a bead mold, such as polystyrene or polyolefin such as polyethylene or polypropylene, and the resin is molded into substantially uniform particles and impregnated with a foaming agent such as butane. It is.
オートローダ−２２は真空ポンプ２４により駆動させら
れ、空気とともに吸引された発泡性樹脂粒子１４を分離
してサービスタンク１６に供給するためのものである。The autoloader 22 is driven by a vacuum pump 24 and serves to separate the foamable resin particles 14 sucked together with air and supply them to the service tank 16.
サービスタンク１６に蓄えられた発泡性樹脂粒子１４は
スクリュー等により計量ホンパー１８に設定された一定
量だけ供給される。The foamable resin particles 14 stored in the service tank 16 are supplied by a screw or the like to a metering pump 18 in a predetermined amount.
一方、計量ホッパー１８には添加剤計量機２６が設けら
れていて、添加剤としてたとえば帯電防止剤が計量ホッ
パー１８に供給される。帯電防止剤の供給量は計量ホッ
パー１８に供給された発泡他樹脂粒子１４に対して、た
とえばＯ，］Ｘ〜２．０χ（重量）の範囲内で帯電防止
すべきランクに応して設定される０本発明に用いられる
帯電防止剤としては、たとえばカチオン界面活性剤等が
好ましく、特にＨＬＢが３〜１８である界面活性剤が好
ましく、また’Ｉ電防止剤の融点が発泡性樹脂粒子１４
を発泡させるために加えられる温度以下（たとえば発泡
ポリスチレンの場合は約９０〜１１０’Ｃ）であるのが
好ましい。すなわち、添加剤の融点はたとえば約４５〜
５０″Ｃ以上であり、且つ約９０°Ｃ未満が例示される
。たとえばＮヒドロキシエチルＮ−２ヒドロキシアルキ
ルアミン（融点約８０’Ｃ）等が好適である。On the other hand, the weighing hopper 18 is provided with an additive measuring machine 26, and an additive such as an antistatic agent is supplied to the weighing hopper 18. The supply amount of the antistatic agent is set in accordance with the rank of the foamed resin particles 14 supplied to the weighing hopper 18, within the range of, for example, O, ]X to 2.0χ (weight) to be prevented from charging. As the antistatic agent used in the present invention, for example, a cationic surfactant is preferable, and a surfactant having an HLB of 3 to 18 is particularly preferable.
The temperature is preferably below that applied to foam the polystyrene (e.g., about 90-110'C for expanded polystyrene). That is, the melting point of the additive is, for example, about 45 to
For example, N-hydroxyethyl N-2 hydroxyalkylamine (melting point: about 80'C) is suitable.
添加剤計量機２６は第２図に示すように、ホッパー２８
内にオーガー３０とブレーカ−３２が配設された装置で
あり、ホンパー２８内に投入された帯電防止剤３４をブ
レーカ−３２により攪拌しつつオーガー３０のスクリュ
ーによって一定量ずつ供給し得るようにされている。帯
電防止剤３４は吸湿性があるためホッパー２８内で塊に
なり易く、またブリッジを形成し易くオーガー３０のス
クリュ一部まで落下して来なくなることが多い。The additive metering machine 26 is connected to a hopper 28 as shown in FIG.
This is a device in which an auger 30 and a breaker 32 are disposed, and the antistatic agent 34 put into the pumper 28 can be agitated by the breaker 32 and supplied in fixed amounts by the screw of the auger 30. ing. Since the antistatic agent 34 is hygroscopic, it tends to clump in the hopper 28 and form bridges, which often prevent it from falling to a part of the screw of the auger 30.
そこで、ホッパー２８の形状が筒状に構成されて帯電防
止剤３４が落下し易くされるとともに、ブレーカ−３２
によって帯電防止剤３４が攪拌され、塊になるのが防止
されている。Therefore, the hopper 28 is configured to have a cylindrical shape to allow the antistatic agent 34 to fall easily, and the breaker 32
The antistatic agent 34 is stirred and prevented from forming into lumps.
計量ホッパー１８内にサービスタンク１６から一定量の
発泡性樹脂粒子１４が送給された後、添加剤計量機２６
から帯電防止剤３４が発泡性樹脂粒子１４の量に対応し
て所定量供給される０次いで、計量ホッパー１８から発
泡性樹脂粒子１４と帯電防止剤３４が予備発泡槽ｌＯに
供給される。After a certain amount of expandable resin particles 14 are fed into the metering hopper 18 from the service tank 16, the additive metering machine 26
The antistatic agent 34 is supplied in a predetermined amount corresponding to the amount of the expandable resin particles 14 from the metering hopper 18. Then, the expandable resin particles 14 and the antistatic agent 34 are supplied from the metering hopper 18 to the pre-foaming tank IO.
予備発泡槽１０内には撹拌ｉ！３６が主軸３８に放射状
に取付けられていて、主軸３日は駆動装置４０によって
回転駆動させられる。一方、予備発泡槽１０には図示し
ないスチーム噴出口が設けられていて、発泡性樹脂粒子
１４を予備発泡させるのに適した温度のスチームがスチ
ーム噴出口から予備発泡槽１０内に噴出させられる。There is a stirring i! in the pre-foaming tank 10. 36 are radially attached to the main shaft 38, and the main shaft 3 is rotationally driven by a drive device 40. On the other hand, the pre-foaming tank 10 is provided with a steam outlet (not shown), and steam at a temperature suitable for pre-foaming the expandable resin particles 14 is ejected into the pre-foaming tank 10 from the steam outlet.
発泡性樹脂粒子１４はスチームによって徐々に発泡させ
られ、次第に粒径が大きくなる。発泡性樹脂粒子１４は
発泡に伴い相互に融着しようとするため、撹拌翼３６に
よって発泡させられた予備発泡粒子４２を攪拌して相互
に融着しないようにされる。一方、帯電防止剤３４は発
泡性樹脂粒子１４（予備発泡粒子４２）と共に攪拌され
て、その表面にほぼ均一に付着させられるとともにスチ
ームによって帯電防止剤３４は溶融させられ予備発泡粒
子４２の表面に強固に付着させられる。The expandable resin particles 14 are gradually expanded by steam, and the particle size gradually increases. Since the expandable resin particles 14 tend to fuse with each other as they are foamed, the pre-expanded particles 42 that have been foamed are stirred by the stirring blade 36 to prevent them from melting together. On the other hand, the antistatic agent 34 is stirred together with the expandable resin particles 14 (pre-expanded particles 42) and is made to adhere almost uniformly to the surface thereof, and the antistatic agent 34 is melted by the steam and applied to the surface of the pre-expanded particles 42. Strongly attached.
発泡性樹脂粒子１４が予備発泡させられて、所定の大き
さの粒径にされた予備発泡粒子４２には帯電防止剤３４
が溶融して固定させられている。The foamable resin particles 14 are pre-foamed to have a predetermined particle size, and the pre-expanded particles 42 are coated with an antistatic agent 34.
is melted and fixed.
スチームの供給停止後も撹拌翼３６を回転させて予備発
泡粒子４２が相互に融着しないようにしたのち、その予
備発泡粒子４２は取出し口４４から退校ホッパー４６に
取り出される。退校ホッパー４６に集められた予備発泡
粒子４２は図示しない圧送ブロワ−により勢威サイロに
供給して一時貯藏され、適宜成形機会型内に供給されて
加熱発泡させられ、所定の金型形状に発泡成形される。Even after the supply of steam is stopped, the stirring blade 36 is rotated to prevent the pre-foamed particles 42 from fusing with each other, and then the pre-foamed particles 42 are taken out from the take-out port 44 to the exit hopper 46. The pre-expanded particles 42 collected in the discharge hopper 46 are supplied to a Sei silo by a pressure blower (not shown) and temporarily stored, and then appropriately supplied to a molding machine mold where they are heated and foamed to form a predetermined mold shape. be done.
成形された発泡成形品の表面について表面抵抗を測定し
た。その結果、発泡成形品はほぼ初期の設定通りの表面
抵抗値を示すとともに、はぼ均一な表面抵抗の分布を示
していた。このことは予備発泡粒子４２０表面に塗布さ
れた帯電防止剤３４が圧送ブロワ−によって離脱し得な
いことを示すものであり、帯電防止剤３４が予備発泡粒
子４２の表面にうまく塗布されて固定されていることが
確認された。Surface resistance was measured on the surface of the foamed molded product. As a result, the foamed molded product showed a surface resistance value that was almost as set at the initial stage, and also showed a fairly uniform distribution of surface resistance. This indicates that the antistatic agent 34 applied to the surface of the pre-expanded particles 420 cannot be removed by the pressure blower, and the antistatic agent 34 is successfully applied and fixed on the surface of the pre-expanded particles 42. It was confirmed that
かかる本発明方法においては、発泡樹脂成形品を製造す
る工程における予備発泡工程で、予備発泡粒子に帯電防
止剤を塗布するように構成しているため、帯電防止剤の
塗布量を適宜に且つ迅速に設定し得て、しかもほとんど
ばらつきのない塗布を得ることができた。In the method of the present invention, since the antistatic agent is applied to the pre-expanded particles in the pre-foaming step in the process of manufacturing a foamed resin molded article, the amount of antistatic agent applied can be adjusted appropriately and quickly. , and was able to obtain coating with almost no variation.
以上、本発明の一実施例を詳述したが、本発明はその他
の態様でも実施し得るものである。Although one embodiment of the present invention has been described in detail above, the present invention can be implemented in other embodiments as well.
たとえば、添加剤計量機２６は計量ホンパー１８に設け
られるだけでなく、添加剤を直接、予備発泡槽ｌＯに供
給し得るように、添加剤計量機２６を予備発泡槽１０に
取付けても良い。添加剤３４は発泡性樹脂粒子１４と同
時に予備発泡槽１０内に供給するように構成しても良く
、また発泡性樹脂粒子１４を供給した後、続いて添加剤
３４を供給するように構成しても良い。For example, in addition to being provided in the metering hopper 18, the additive metering device 26 may be attached to the pre-foaming tank 10 so that the additive can be supplied directly to the pre-foaming tank IO. The additive 34 may be configured to be supplied into the pre-foaming tank 10 at the same time as the expandable resin particles 14, or the additive 34 may be configured to be supplied subsequently after the expandable resin particles 14 are supplied. It's okay.
また、添加剤は帯電防止剤に限らず、その他の界面活性
剤であっても良く、あるいは底形サイクル向上剤やブロ
ッキング防止剤であっても良い。Further, the additive is not limited to an antistatic agent, but may be another surfactant, or may be a bottom cycle improver or an antiblocking agent.
これらの添加剤の内、本発明方法が効果的に適用される
のは粉末状のものであり、微粉末やあるいは粒状のもの
であっても良い、更に、添加剤は発泡性樹脂粒子を予備
発泡させる発泡温度以下で溶融し得るものが好ましい。Among these additives, the method of the present invention is effectively applied to powdered ones, and fine powder or granular ones may also be used. It is preferable to use a material that can be melted at a temperature below the foaming temperature.
その他、スチームに限定されず、たとえば熱風などで発
泡性樹脂粒子を予備発泡させるように構成することも可
能であり、また、本発明の実施装置は図示した装置に限
定されるものではない等、本発明方法はその趣旨を逸脱
しない範囲内で、当業者の知識に基づき種々なる改良、
修正、変形を加えたＢ様で実施し得るものである。In addition, it is possible to pre-foam the expandable resin particles using not only steam but also hot air, and the apparatus for carrying out the present invention is not limited to the illustrated apparatus. The method of the present invention may be modified in various ways based on the knowledge of those skilled in the art without departing from the spirit thereof.
This can be implemented by Mr. B with modifications and transformations.
（発明の効果〕
かかる本発明の添加剤塗布方法は発泡性樹脂粒子の予備
発泡工程で発泡性樹脂粒子を予備発泡させるとともに予
備発泡槽に投入された添加剤を攪拌してその予備発泡粒
子の表面に万遍なく付着させるとともに、予備発泡させ
る熱により塗布するように構成しているため、添加剤が
予備発泡粒子の表面から離脱させられることはない。し
たがって、予備発泡後に予備発泡粒子を圧送ブロワ−等
によって空気圧送しても、予備発泡粒子の表面から添加
剤が離脱することがなく、発泡成形された成形品には添
加剤がほぼ均一に添加される。(Effects of the Invention) In the additive coating method of the present invention, the expandable resin particles are pre-foamed in the pre-foaming step of the expandable resin particles, and the additives put into the pre-foam tank are stirred to form the pre-foamed particles. Since the additive is applied evenly to the surface and is applied using the heat of pre-foaming, the additive is not removed from the surface of the pre-foamed particles.Therefore, after pre-foaming, the pre-foamed particles are pumped. Even when air is fed by a blower or the like, the additive does not come off from the surface of the pre-expanded particles, and the additive is almost uniformly added to the foam-molded article.
また、本発明方法においては、添加剤が全て予備発泡粒
子に塗布されるため、添加剤の添加量の微調整が可能と
なり、また、予備発泡工程で添加剤を添加するようにし
ているため、添加剤の添加の有無及び添加量の調整を迅
速に変更することが可能となる。更に、添加剤の添加を
任意に且つ直ちに変更あるいは調整できることから、種
々の在庫を！１！備しておく必要がなくなり、しかも多
品種小ロットの生産が可能となる等、本発明は優れた効
果を奏する。In addition, in the method of the present invention, since all of the additives are applied to the pre-foamed particles, it is possible to finely adjust the amount of additives added, and since the additives are added in the pre-foaming step, It becomes possible to quickly change whether or not to add an additive and adjust the amount of addition. Furthermore, since the addition of additives can be changed or adjusted at will and immediately, we have a wide variety of stocks! 1! The present invention has excellent effects, such as eliminating the need to keep them in stock and enabling production of a wide variety of products in small lots.
第１図は本発明に係る予備発泡粒子の添加剤塗布方法を
実施するための予備発泡機の一実施例を示す説明図であ
り、第２図は第１図に示す添加剤計量機の一実施例を示
す説明図である。
１０；予備発泡槽
１４；発泡性樹脂粒子
１８；計量ホンバー
２６；添加剤計量機
３４；帯電防止剤
３６；撹拌翼
４２：予備発泡粒子FIG. 1 is an explanatory diagram showing an embodiment of a pre-foaming machine for carrying out the method of applying additives to pre-foamed particles according to the present invention, and FIG. 2 is an explanatory diagram showing an example of the additive measuring machine shown in FIG. It is an explanatory view showing an example. 10; Pre-foaming tank 14; Expandable resin particles 18; Measuring horn 26; Additive measuring machine 34; Antistatic agent 36; Stirring blade 42: Pre-foamed particles
Claims (2)
粒子を製造する方法において、予備発泡槽内に発泡性樹
脂粒子と粉末状の添加剤とを投入し、撹拌させながら該
発泡性樹脂粒子を予備発泡させて、該予備発泡させられ
た予備発泡粒子の表面に添加剤を塗布又は融着させるこ
とを特徴とする予備発泡粒子の添加剤塗布方法。(1) In a method of heating and pre-foaming expandable resin particles to produce pre-expanded particles, expandable resin particles and powdered additives are placed in a pre-expanding tank, and the expandable resin is stirred while being stirred. 1. A method for applying additives to pre-expanded particles, which comprises pre-expanding the particles and applying or fusing an additive onto the surface of the pre-expanded particles.
性剤、成形サイクル向上剤、ブロッキング防止剤、着色
剤又は改質剤等であることを特徴とする請求項第１項に
記載する予備発泡粒子の添加剤塗布方法。(2) The powdered additive is an antistatic agent or other surfactant, a molding cycle improver, an antiblocking agent, a coloring agent, a modifier, etc. Additive application method for pre-expanded particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1839790A JPH03221543A (en) | 1990-01-28 | 1990-01-28 | Additive coating method for pre-expanded beads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1839790A JPH03221543A (en) | 1990-01-28 | 1990-01-28 | Additive coating method for pre-expanded beads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03221543A true JPH03221543A (en) | 1991-09-30 |
Family
ID=11970563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1839790A Pending JPH03221543A (en) | 1990-01-28 | 1990-01-28 | Additive coating method for pre-expanded beads |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03221543A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6147130A (en) * | 1997-01-30 | 2000-11-14 | Enichem S.P.A. | Process for the production of expandable particles of styrene polymers |
| JP2002003634A (en) * | 2000-06-23 | 2002-01-09 | Asahi Kasei Corp | Functional polyolefin resin foam particle and molded article thereof |
| JP2009226871A (en) * | 2008-03-25 | 2009-10-08 | Sekisui Plastics Co Ltd | Antistatic thermoplastic resin foamed molding and its production process, molding die for producing antistatic thermoplastic resin foamed molding and molding device for producing antistatic thermoplastic resin foamed molding |
-
1990
- 1990-01-28 JP JP1839790A patent/JPH03221543A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6147130A (en) * | 1997-01-30 | 2000-11-14 | Enichem S.P.A. | Process for the production of expandable particles of styrene polymers |
| JP2002003634A (en) * | 2000-06-23 | 2002-01-09 | Asahi Kasei Corp | Functional polyolefin resin foam particle and molded article thereof |
| JP2009226871A (en) * | 2008-03-25 | 2009-10-08 | Sekisui Plastics Co Ltd | Antistatic thermoplastic resin foamed molding and its production process, molding die for producing antistatic thermoplastic resin foamed molding and molding device for producing antistatic thermoplastic resin foamed molding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101186084B (en) | Method and device for manufacturing polymer particles | |
| US5413855A (en) | Shaped bodies of granulated beads and method | |
| JPH0256240A (en) | Production and apparatus for expanded thermoplastic micro-ball | |
| US4302549A (en) | Method of preparing expandable polystyrene | |
| WO1995013131A1 (en) | High speed agitated granulation method and high speed agitated granulating machine | |
| JPH03221543A (en) | Additive coating method for pre-expanded beads | |
| US3773876A (en) | Method for making packaging material | |
| JPS6253766A (en) | Curtain-coating device | |
| US4281036A (en) | Method for coating fine particulate expandable styrene polymers | |
| US4728476A (en) | Method of supplying a moldable mixture of materials to an article forming mold of an injection molding machine | |
| US3252228A (en) | Expander for polymeric material | |
| JP4072782B2 (en) | Wet refractory material manufacturing method, wet refractory material manufacturing apparatus, and wet refractory material spraying apparatus | |
| JPH06246745A (en) | Mixer for resin particles and manufacture of mixed resin molded form | |
| JPS626578B2 (en) | ||
| JPS61211350A (en) | Method for pre-expanding expandable polystyrene bead | |
| JPH0127846B2 (en) | ||
| JPS636584B2 (en) | ||
| Usha et al. | Techniques involved in Conversion of Powders into Granules-An Overview | |
| JP2003277514A (en) | Surface treatment method for expandable thermoplastic resin particle | |
| WO1999018148A1 (en) | Composition of powder-coated tacky material and method of making same | |
| JPH0488036A (en) | Production of molded article of expanded polystyrene and production device therefor | |
| JPS645805B2 (en) | ||
| JP2000084927A (en) | Method for processing particles using thermally fusible substance | |
| JPS63125537A (en) | Production of antistatic expandable resin particle | |
| CN109705391B (en) | Self-foaming hot melt adhesive compositions and methods of making and using the same |