JPH02308900A - Detergent for molding machine - Google Patents
Detergent for molding machineInfo
- Publication number
- JPH02308900A JPH02308900A JP1128759A JP12875989A JPH02308900A JP H02308900 A JPH02308900 A JP H02308900A JP 1128759 A JP1128759 A JP 1128759A JP 12875989 A JP12875989 A JP 12875989A JP H02308900 A JPH02308900 A JP H02308900A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- thermoplastic resin
- cleaning
- water
- molding machine
- 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.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 51
- 239000003599 detergent Substances 0.000 title abstract 3
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 64
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 239000011347 resin Substances 0.000 claims abstract description 48
- 239000003365 glass fiber Substances 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims description 36
- 239000012459 cleaning agent Substances 0.000 claims description 25
- 239000000155 melt Substances 0.000 claims description 11
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 48
- 239000000654 additive Substances 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 4
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 abstract description 4
- 239000000049 pigment Substances 0.000 abstract description 3
- 230000000704 physical effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 18
- 239000000203 mixture Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 239000012778 molding material Substances 0.000 description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 6
- 239000004926 polymethyl methacrylate Substances 0.000 description 6
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000011086 high cleaning Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 241001385733 Aesculus indica Species 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001083 polybutene Polymers 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
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/70—Maintenance
- B29C33/72—Cleaning
- B29C33/722—Compositions for cleaning moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
- B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Detergent Compositions (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野
本発明は、熱可塑性樹脂用成形機による所定作業終了時
に、当該成形機内に残留する熱可塑性樹脂及びそれに含
まれる染顔料等の添加物を除去するための洗浄剤に関す
る。Detailed Description of the Invention [Industrial Field of Application] The present invention is a method for removing thermoplastic resin remaining in a molding machine for thermoplastic resin and additives such as dyes and pigments contained therein at the end of a predetermined operation by a molding machine for thermoplastic resin. Concerning cleaning agents for cleaning.
[従来の技術]
一般に、熱可塑性樹脂の着色、混合、成形等を目的に成
形機(押出し・射出)が用いられるが、所定の作業終了
時に、当該樹脂そのものや樹脂中に含まれている染顔料
等の添加剤が成形機内に残留する。この残留物は、次に
行われる異種樹脂又は異色樹脂の成形時に成形品中に混
入し、製品外観不良の原因となる。[Prior Art] Generally, a molding machine (extrusion/injection) is used for coloring, mixing, molding, etc. of thermoplastic resin, but when a certain operation is completed, the resin itself and the dye contained in the resin are removed. Additives such as pigments remain in the molding machine. This residue is mixed into the molded product during the subsequent molding of a different type of resin or a different color resin, causing a poor appearance of the product.
従来、上記残留物を成形機内から除去するため、人力に
より成形機の分解掃除をする方法、成形機を停止せずに
そのまま次に成形に供する樹脂を成形機内に充填し、こ
れにより残留物を少しづつ置換して行く方法及び市販の
洗浄剤を用いる方法が実施されている。Conventionally, in order to remove the above-mentioned residue from inside the molding machine, there have been methods such as manually disassembling and cleaning the molding machine, and filling the molding machine with the resin to be used for the next molding without stopping the molding machine, thereby removing the residue. Methods of gradual replacement and methods using commercially available cleaning agents have been implemented.
特に、上記市販の洗浄剤としては次のものが知られてい
る。In particular, the following are known as the above-mentioned commercially available cleaning agents.
(1)超高分子アクリル樹脂に、発泡剤、カオリン及び
炭酸カルシウムを含有させたもの(半溶融タイプ)。(1) Ultra high molecular weight acrylic resin containing a blowing agent, kaolin and calcium carbonate (semi-molten type).
(2)熱可塑性樹脂に界面活性剤を含有させたもの(完
全溶融タイプ)。(2) A thermoplastic resin containing a surfactant (completely melted type).
(3)発泡剤入り金属石けん(ブレンドタイプ)。(3) Metallic soap with foaming agent (blend type).
一方、洗浄後の成形に使用する熱可塑性樹脂と同一種類
の樹脂に、該樹脂100重量当り、1〜20重量部のガ
ラス繊維を添加した樹脂組成物を用いることも知られて
いる(特公昭53−41711号)。On the other hand, it is also known to use a resin composition obtained by adding 1 to 20 parts by weight of glass fiber per 100 weight of the resin to the same type of thermoplastic resin used for molding after washing (Tokuko Showa). 53-41711).
[発明が解決しようとする課題]
しかし、人力による分解掃除では、多数の人手と長時間
を要し、生産性低下の大きな要因となっている。また、
成形機の構造上簡単に分解出来ない箇所(例えばシリン
ダー内壁)に残留物が残る問題もある。[Problems to be Solved by the Invention] However, manual disassembly and cleaning requires many hands and a long time, which is a major factor in reducing productivity. Also,
There is also the problem that residue remains in parts of the molding machine that cannot be easily disassembled due to its structure (for example, the inner wall of the cylinder).
次に使用する成形材料で置換して行く方法では、成形を
目的とする樹脂は洗浄に適した設計になっていないため
、洗浄効果が低く、多量の樹脂と長時間を要する。加え
て、例えばゴム熱劣化物等、残留物の種類によっては除
去出来ない場合がある。In the method of replacing the resin with the molding material to be used next, the resin intended for molding is not designed to be suitable for cleaning, so the cleaning effect is low and a large amount of resin and a long time are required. In addition, depending on the type of residue, such as heat-degraded rubber products, it may not be possible to remove them.
市販の洗浄剤を用いる方法は、いずれの洗浄剤□も洗浄
剤として下記の如き致命的欠点を有しているため、一般
に普及していない。The method of using commercially available cleaning agents is not generally popular because all cleaning agents □ have the following fatal drawbacks as cleaning agents.
(1)半溶融タイプの洗浄剤は、それ自体が成形機内に
残留しやすく、次の成形材料に混入して異物トラブルを
発生させる。(1) Semi-molten type cleaning agents tend to remain in the molding machine and mix with the next molding material, causing foreign matter problems.
(′2)完全溶融タイプの洗浄剤は、洗浄効果が低い上
に、洗浄後透明樹脂に戻すのに長時間を要する。('2) Completely melting type cleaning agents have low cleaning effects and require a long time to return to transparent resin after cleaning.
(3)ブレンドタイプの洗浄剤は、洗浄効果が低いうえ
に、成形材料への予備ブレンド作業が必要で、使用に手
間がかかる。(3) Blend-type cleaning agents have low cleaning effects and require preliminary blending into the molding material, making them time-consuming to use.
更に、次に、使用する熱可塑性樹脂と同一種類の樹脂に
ガラス繊維を添加したものは、やはり洗浄効果が十分で
ないだけでな(、添加したガラス繊″ 維が成形機内に
残留し、次の成形材料に混入して成形品に外観不良を発
生させる。また、同一の成形現場で多種の樹脂を用いる
場合は、成形材料の種類毎にガラス繊維添加品を用意す
る必要があり、煩雑である。Furthermore, if glass fiber is added to the same type of resin as the thermoplastic resin used, not only will the cleaning effect not be sufficient (the added glass fiber will remain in the molding machine, causing problems in the next process). It mixes with the molding material and causes defects in the appearance of the molded product.Also, when using various resins at the same molding site, it is necessary to prepare glass fiber additives for each type of molding material, which is complicated. .
[課題を解決するための手段]
本発明は、このような従来未解決の課題に着目して成さ
れたもので、熱可塑性樹脂用成形機内残留物の洗浄剤と
して、含水させた熱可塑性樹脂とガラス繊維を合わせた
ものが高い洗浄作用を有し、洗浄時間と洗浄用樹脂を大
幅に削減できることを本発明者等が見出したことによっ
て完成されたものである。[Means for Solving the Problems] The present invention has been made by focusing on such conventionally unresolved problems, and uses a thermoplastic resin containing water as a cleaning agent for residue inside a molding machine for thermoplastic resins. This invention was completed by the inventors of the present invention, who discovered that a combination of water and glass fibers has a high cleaning effect and can significantly reduce cleaning time and cleaning resin.
即ち、本発明は、メルトフローレイトが1〜30g1L
O分(220℃・1okg)の熱可塑性合成樹脂に水分
を含有させた洗浄樹脂を少なくとも一部に含み、メルト
フローレイトが1〜30g/10分(220℃・lOk
g)で全体の水分量が0.5〜5重量%に調整された熱
可塑性樹脂70〜95重量%と、ガラス繊維30〜5重
量%とからなる成形機用洗浄剤である。That is, in the present invention, the melt flow rate is 1 to 30 g/L.
At least a part of the cleaning resin is made by adding water to a thermoplastic synthetic resin with a melt flow rate of 1 to 30 g/10 minutes (220°C/100 kg).
A cleaning agent for a molding machine comprising 70 to 95% by weight of a thermoplastic resin whose total water content is adjusted to 0.5 to 5% by weight in g) and 30 to 5% by weight of glass fiber.
本発明に用いる熱可塑性樹脂としては、メルトフローレ
イトが1〜lOg/10分(220℃、 10Kg)で
あることが必要である。メルトフローレイトが1g71
0分未満では、標準的な成形条件、例えば成形温度20
0〜280℃で使用できなく、また10g/10分を越
えると十分な洗浄効果が得にくくなる。The thermoplastic resin used in the present invention needs to have a melt flow rate of 1 to 1 Og/10 minutes (220°C, 10 kg). Melt flow rate is 1g71
For less than 0 minutes, standard molding conditions, e.g. molding temperature 20
It cannot be used at a temperature of 0 to 280°C, and if it exceeds 10 g/10 minutes, it becomes difficult to obtain a sufficient cleaning effect.
本発明で用いる熱可塑性樹脂としては、メルトフローレ
イトが上記範囲内のものであれば、射出成形や押出し成
形等に供される一般の熱可塑性樹脂を広(用いることが
できる。具体例としては、ポリエチレン、ポリプロピレ
ン、ポリスチレン、AS樹脂、ABS樹脂、ポリメチル
メタクリレート、ポリ塩化ビニル、ポリアミド系樹脂、
ポリカーボネート、ポリブテン等を挙げることができる
。また、これらの熱可塑性樹脂は、単独で用いても二種
以上混合して用いてもよい。As the thermoplastic resin used in the present invention, a wide range of general thermoplastic resins used for injection molding, extrusion molding, etc. can be used as long as the melt flow rate is within the above range. , polyethylene, polypropylene, polystyrene, AS resin, ABS resin, polymethyl methacrylate, polyvinyl chloride, polyamide resin,
Examples include polycarbonate and polybutene. Further, these thermoplastic resins may be used alone or in combination of two or more.
本発明では、上記のように、一般の熱可塑性樹脂を広く
用いることができるが、熱可塑性樹脂の種類としては、
洗浄作業後の成形に供する熱可塑性樹脂と同一組成のも
のが好ましい。また、残留樹脂の種類を問わず高い洗浄
効果が得られ、各種の熱可塑性樹脂を単一の洗浄剤で洗
浄できる観点からは、スチレン・アクリロニトリル共重
合体が好ましい。In the present invention, as described above, a wide range of general thermoplastic resins can be used, but the types of thermoplastic resins include:
It is preferable to use a thermoplastic resin having the same composition as the thermoplastic resin to be used for molding after cleaning. In addition, styrene-acrylonitrile copolymer is preferred from the viewpoint that a high cleaning effect can be obtained regardless of the type of residual resin and that various thermoplastic resins can be cleaned with a single cleaning agent.
本発明においては、上記熱可塑性樹脂に水分を含有させ
たものを洗浄樹脂として用いる。この洗浄樹脂において
は、水を0.5〜25重量%含有させることが必要であ
る。含水量が0.5%未満では洗浄効果が劣り、25重
量%を越えて含有させることは技術的に困難になるばか
りか、成形機への投入時の衝撃等で水が流出しやすくな
る。In the present invention, the above thermoplastic resin containing water is used as the cleaning resin. This cleaning resin needs to contain 0.5 to 25% by weight of water. If the water content is less than 0.5%, the cleaning effect will be poor, and if the water content exceeds 25% by weight, it will not only be technically difficult, but also water will tend to flow out due to impact etc. when being introduced into a molding machine.
本発明において、熱可塑性樹脂に水分を含有させるとは
、常温において簡単に外部に流出しない状態で、熱可塑
性樹脂に水分を持たせることをいい、例えば、熱可塑性
樹脂自体にその吸湿性を利用して水分を担持させたり、
粒状の熱可塑性樹脂内に中空部を形成してそこに水を封
入しておくこと等が挙げられる。In the present invention, adding moisture to a thermoplastic resin refers to adding moisture to the thermoplastic resin without easily leaking out at room temperature. For example, using the hygroscopicity of the thermoplastic resin itself to retain moisture,
For example, forming a hollow part in a granular thermoplastic resin and sealing water therein can be mentioned.
従って、本発明においては、例えば、粒状又は粉状の熱
可塑性樹脂と水の単なる混合物や、熱可塑性樹脂と吸水
性又は結晶水を有する他の物質との混合物等は除外され
る。前者の場合、水が熱可塑性樹脂と遊離又は熱可塑性
樹脂の粉体又は粒体の表面に付着している状態にあるの
で、その投入時に成形機のホッパーやホッパー直下の内
壁に水が付着し、この水が次に使用する樹脂を濡らして
成形不良の原因となる。また、後者の場合、吸水性又は
結晶水を有する他の物質が成形機内に残留しやすく、や
はり次の成形を阻害する。Therefore, the present invention excludes, for example, a mere mixture of a granular or powdered thermoplastic resin and water, or a mixture of a thermoplastic resin and another substance having water absorbency or water of crystallization. In the former case, water is either free with the thermoplastic resin or attached to the surface of the thermoplastic resin powder or granules, so water may adhere to the hopper of the molding machine or the inner wall directly below the hopper when it is introduced. This water wets the resin to be used next, causing molding defects. Moreover, in the latter case, other substances having water absorption properties or water of crystallization tend to remain in the molding machine, which also inhibits subsequent molding.
゛熱可塑性樹脂に水分を含有させて洗浄樹脂を得る方法
を更に具体的に説明すると、例えば次のようにして行う
ことができる。More specifically, the method for obtaining a cleaning resin by adding moisture to a thermoplastic resin can be carried out, for example, as follows.
(1)吸湿性を有する熱可塑性樹脂に、自然吸水(空気
中からの吸湿)やブレンダー等による水との接触等によ
って水分を吸着させることができる。(1) A thermoplastic resin having hygroscopic properties can absorb moisture by natural water absorption (moisture absorption from the air) or by contact with water using a blender or the like.
吸湿性を有する熱可塑性樹脂としては、一般に親水性基
を有する熱可塑性樹脂、例えばスチレン−アクリロニト
リル共重合体等が用いられる。スチレン・アクリロニト
リル共重合体を用いる場合、水分を含有させやすくする
ために、アクリロニトリルの含有量が25〜50重量%
、特に30〜50重量%であることが好ましい。As the hygroscopic thermoplastic resin, a thermoplastic resin having a hydrophilic group, such as a styrene-acrylonitrile copolymer, is generally used. When using a styrene-acrylonitrile copolymer, the content of acrylonitrile is 25 to 50% by weight to make it easier to contain water.
, particularly preferably 30 to 50% by weight.
(2)次のようにして、押出機を用いて粒状熱可塑性樹
脂中に水を封入することができる。(2) Water can be encapsulated in a granular thermoplastic resin using an extruder in the following manner.
まず、ベントロを塞いだ二軸押出機を用いて熱可塑性樹
脂な押出ながら、注入ノズルから水を圧入する。すると
水は、樹脂と相溶性が悪い上にシリング−内で加熱され
るため、ノズル部で気化し、これによって発泡状の樹脂
が吐出される。First, while extruding thermoplastic resin using a twin-screw extruder with a vent closed, water is injected through an injection nozzle. Then, since the water has poor compatibility with the resin and is heated within the syringe, it vaporizes at the nozzle, thereby discharging a foamed resin.
この吐出物を水で急冷し、粒状に仕上げると、水の閉じ
込められた多孔質物の熱可塑性樹脂を得ることができる
。By quenching this discharged material with water and finishing it into granules, it is possible to obtain a porous thermoplastic resin in which water is trapped.
粒状にするためには、アンダーウォーターカッターを用
いるか、ノズルからの吐出物を直接水槽に受けて急冷後
粉砕する方法がある。In order to make it into granules, there is a method of using an underwater cutter or directly receiving the discharged material from a nozzle in a water tank, quenching it, and then pulverizing it.
(3)次のようにして、熱可塑性樹脂溶液を用いて、カ
プセル状に水を封入した熱可塑性樹脂を得ることができ
る。即ち、熱可塑性樹脂溶液中に氷片を投入し、撹拌後
取出して真空乾燥することにより、熱可塑性樹脂による
水のカプセル状物を得ることができる。投入する氷片と
しては、0.5〜5mm程度の径のもので、熱可塑性樹
脂溶液に投入されることで瞬時に溶解しない範囲ででき
るだけ径の小さいものが好ましい。具体的には2mm以
下の径であることが好ましい。(3) A thermoplastic resin encapsulating water in a capsule shape can be obtained using a thermoplastic resin solution in the following manner. That is, water capsules made of thermoplastic resin can be obtained by adding ice chips to a thermoplastic resin solution, stirring it, taking it out, and drying it under vacuum. It is preferable that the ice pieces to be thrown in have a diameter of about 0.5 to 5 mm, and should be as small as possible within a range that does not melt instantly when thrown into the thermoplastic resin solution. Specifically, the diameter is preferably 2 mm or less.
上述のように、洗浄樹脂においては、吸湿性を利用して
水分を担持させる場合と、物理的に水を封じ込める場合
とがあるが、洗浄樹脂の水分含有量を調整しやすい点か
ら、後者の方が好ましい。As mentioned above, there are two types of cleaning resin: one that uses hygroscopicity to hold water and the other that physically confines water.The latter method is preferred because it is easier to adjust the water content of the cleaning resin. is preferable.
洗浄樹脂の含水量が0.5〜5重量%の場合にはそれ単
独でもよいが、特に含水量が5重量%を越える洗浄樹脂
は、熱可塑性樹脂全体の含水量が0.5〜5重量%とな
るよう、他の熱可塑性樹脂と混合されるものである。全
体の含水量が0.5・重量%未満では十分な洗浄効果が
得に((,5重量%を越えると洗浄操作が機械的に困難
となる。尚、上記混合は、粒状の洗浄樹脂と、粒状の他
の熱可塑性樹脂を合わせることによって容易に行うこと
ができる。If the water content of the cleaning resin is 0.5 to 5% by weight, it may be used alone, but especially for cleaning resins with a water content exceeding 5% by weight, the water content of the entire thermoplastic resin is 0.5 to 5% by weight. % with other thermoplastic resins. If the total water content is less than 0.5% by weight, a sufficient cleaning effect will not be obtained.If the total water content exceeds 5% by weight, the cleaning operation becomes mechanically difficult. This can be easily done by combining other thermoplastic resins in granular form.
上記本洗浄剤と混合される他の熱可塑性樹脂とは、水分
を含有させていない熱可塑性樹脂のことで、洗浄樹脂を
構成する熱可塑性樹脂と同一の組成のものでも異なる組
成のものでもよいが、同一組成のものが好ましく、特に
次の成形に用いる熱可塑性樹脂と同一組成のものが好ま
しい。The other thermoplastic resin mixed with the main cleaning agent mentioned above is a thermoplastic resin that does not contain water, and may have the same composition as the thermoplastic resin that makes up the cleaning resin or a different composition. However, it is preferable that the thermoplastic resin has the same composition as that of the thermoplastic resin used for the next molding.
また、本洗浄剤の洗浄効果は、ある程度含有水分量に比
例し、熱可塑性樹脂のメルトフローレイトに反比例する
関係を有する。従って、含水量の小さいものほど、洗浄
樹脂に用いる熱可塑性樹脂並びに洗浄樹脂と混合する他
の熱可塑性樹脂をメルトフローレイトの小さいものとし
、逆にこれらの熱可塑性樹脂のメルトフローレイトが大
きいときには含水量を太き(することが好ましい。特に
、吸湿性を利用して水分を担持させた洗浄樹脂について
は、通常2重量%を越える水分を担持させておくのは困
難であるので、これらの熱可塑性樹脂として、メルトフ
ローレイトが1〜4g/10分(220℃・10分)の
ものを用いることが好ましい。Further, the cleaning effect of the cleaning agent is proportional to the water content to some extent and inversely proportional to the melt flow rate of the thermoplastic resin. Therefore, the lower the water content, the lower the melt flow rate of the thermoplastic resin used for the cleaning resin and other thermoplastic resins mixed with the cleaning resin, and conversely, when the melt flow rate of these thermoplastic resins is higher, It is preferable to increase the water content. Especially for cleaning resins that use hygroscopic properties to support water, it is usually difficult to support more than 2% by weight of water. It is preferable to use a thermoplastic resin having a melt flow rate of 1 to 4 g/10 minutes (220° C., 10 minutes).
本発明に用いられるガラス繊維としては、通常プラスチ
ック用として市販されているガラス繊維に比較して、カ
ップリング剤を、 200〜300%増量して2000
〜3000ppmにしたものが好ましい。また、長さ及
び径は、通常プラスチック用として市販されているもの
と同様である。The glass fiber used in the present invention contains a coupling agent in an amount of 200 to 300% compared to glass fiber commercially available for plastics.
Preferably, the content is adjusted to 3000 ppm. Further, the length and diameter are similar to those commercially available for plastics.
上記ガラス繊維の使用量は次の通りである。The amount of the glass fiber used is as follows.
(1)含有量0.5〜5重量%の洗浄樹脂のみを用いる
場合、この洗浄樹脂70〜95重量%に対してガラス繊
維5〜30重量%。(1) When only a cleaning resin with a content of 0.5 to 5% by weight is used, 5 to 30% by weight of glass fiber is used with respect to 70 to 95% by weight of this cleaning resin.
(2)洗浄樹脂と他の熱可塑性樹脂を混合して含水量を
0.5〜5重量%に調整したものを用いる場合、この洗
浄樹脂及び他の熱可塑性樹脂70〜95重量%に対して
ガラス繊維5〜30重量%。(2) When using a mixture of cleaning resin and other thermoplastic resin with water content adjusted to 0.5 to 5% by weight, based on 70 to 95% by weight of this cleaning resin and other thermoplastic resin. Glass fiber 5-30% by weight.
上記いずれの場合も、ガラス繊維の量が5重量%未満で
はガラス繊維を添加した効果がなく、また30重量%を
越えると成形機のシリンダー摩擦等の悪影響を生じる。In any of the above cases, if the amount of glass fiber is less than 5% by weight, the addition of glass fiber will have no effect, and if it exceeds 30% by weight, adverse effects such as cylinder friction of the molding machine will occur.
ガラス繊維は、上記所定量を、粒状の洗浄樹脂や他の熱
可塑性樹脂と混合しておくだけでもよいが、洗浄樹脂を
構成する熱可塑性樹脂や他の熱可塑性樹脂にあらかじめ
練り込んでおいてもよい。It is possible to simply mix the specified amount of glass fiber with granular cleaning resin or other thermoplastic resin, but it is also possible to mix the glass fiber in advance into the thermoplastic resin or other thermoplastic resin that makes up the cleaning resin. Good too.
本洗浄剤は射出成形機、押出し成形機に対して特に有益
であるが、これらと同様に熱可塑性樹脂を加熱溶融させ
て混練するシリンダ一部を有する装置であれば広く適用
することができる。This cleaning agent is particularly useful for injection molding machines and extrusion molding machines, but it can be widely applied to any equipment that has a cylinder part that heats and melts thermoplastic resin and kneads it.
本洗浄剤をベント付成形機に使用する場合は、全体の5
〜10重量%をベントロから添加すると好ましい結果が
得られる。When using this cleaning agent on a molding machine with a vent,
Favorable results are obtained when ~10% by weight is added via ventro.
本洗浄剤を用いる場合の成形機の運転条件は、シリンダ
ー内圧が上昇するような条件に設定すると、効果がより
顕著になるので好ましい。即ち、シリンダ一温度を吐出
可能な範囲で下げる、背圧を掛ける、高速で射出させる
、等の操作を行うことが好ましい。When using this cleaning agent, it is preferable to set the operating conditions of the molding machine to such a condition that the cylinder internal pressure increases because the effect becomes more pronounced. That is, it is preferable to perform operations such as lowering the cylinder temperature within a range that allows for discharge, applying back pressure, and injecting at high speed.
[作 用]
熱可塑性樹脂とガラス繊維は、それ自身が成形機内を移
動するに伴って、成形機内の残留物を付着位置から引き
剥して、これを搬出する役割をなす。[Function] As the thermoplastic resin and glass fiber move within the molding machine, they play the role of peeling off residue within the molding machine from the attachment position and carrying it out.
一方、含有されている水の働きは必ずしも明らかではな
いが、成形機内で加熱されて蒸、気となり、成形機内面
と付着残留物との間にこの蒸気が入り込んで、付着残留
物の剥離を促していると考えられる。また、蒸気との接
触によって付着残留物がある程度冷却硬化することも、
その剥離を促すことになっていると考えられる。そして
、このような蒸気の働きは、同時にガラス繊維の残留防
止にも寄与していると考えられる。On the other hand, although the function of the contained water is not necessarily clear, it is heated inside the molding machine and turns into steam and gas, and this steam enters between the inside of the molding machine and the adhered residue, causing it to peel off. It is thought that it is encouraging. In addition, the adhering residue may cool and harden to some extent due to contact with steam.
It is thought that this promotes the peeling. It is thought that the action of such steam also contributes to the prevention of remaining glass fibers.
[実施例]
次に本発明を実施例及び比較例により説明する。尚、実
施例及び比較例に使用した成形機、成形条件及び測定条
件は以下の通りである。[Examples] Next, the present invention will be explained by using Examples and Comparative Examples. The molding machines, molding conditions, and measurement conditions used in Examples and Comparative Examples are as follows.
原形機:射出成形機(インラインスクリュー型)東芝l
5125 (型締力125トン・容量1002)
成形温度:実施例 比較例毎に表−1に示す。Original machine: Injection molding machine (in-line screw type) Toshiba l
5125 (mold clamping force 125 tons/capacity 1002) Molding temperature: Examples and comparative examples are shown in Table 1.
メルトフローレイト:JIS−に7210゜アクリロニ
トリル含有量(AN%):赤外線分光光度計。Melt flow rate: 7210° according to JIS-Acrylonitrile content (AN%): Infrared spectrophotometer.
水分含有量:次式により求めた。Moisture content: Calculated using the following formula.
W + W4 / W + X 100%(吸湿によ
るもの)
W2−W3/w+ X 100%
(封入によるもの)
Wl:サンプルの重量
W2:80℃、2時間熱風乾燥後の重量W3:W2測定
後のサンプルを粉砕し
80°C12時間熱風乾燥後の重量
W4:サンプルを粉砕し80℃、2時間熱風乾燥後の重
量
実施例1
洗浄前の樹脂としてグラフト化ポリフェニレン(以下略
号XY樹脂で示す)を使用し、XY黒着色品を成形機内
に充填後、完全に排出し成形機内を空にした。次に、表
−1に示す本発明の洗浄剤を2kg投入し、射出操作に
より排出し終了までの時間と、洗浄剤排出後にポリアセ
タール(以下略号ROMで示す)無色品を成形して、前
述の黒着色品の残留物の影響(黒色の汚班)の無いこと
が確認されるまでの時間と使用樹脂量を測定した。W + W4 / W + X 100% (due to moisture absorption) W2-W3/w+ Weight after crushing the sample and drying it with hot air for 12 hours at 80°C W4: Weight after crushing the sample and drying it with hot air at 80°C for 2 hours Example 1 Grafted polyphenylene (hereinafter abbreviated as XY resin) was used as the resin before washing. After filling the XY black colored product into the molding machine, the molding machine was completely discharged and the inside of the molding machine was emptied. Next, 2 kg of the cleaning agent of the present invention shown in Table 1 was put in, and the time taken to discharge it by injection operation and the completion time was determined. The time taken until it was confirmed that there was no effect of the residue of the black colored product (black stains) and the amount of resin used were measured.
その結果を表−1に示す。The results are shown in Table-1.
比較例1
実施例1と同様の方法でXY樹脂黒着色品を成形機内に
充填後完全に排出し、成形機内を空にした後、表−1に
示すPOMにガラスを添加したものを成形機に投入し、
成形により前述の黒着色品の影響(黒色の汚班)の無く
なるまでの必要樹脂量と所要時間を測定した。その結果
を表−1に示す。Comparative Example 1 After filling a molding machine with a black-colored XY resin in the same manner as in Example 1, the molding machine was completely discharged and the inside of the molding machine was emptied. put it into
The amount of resin required and the time required until the influence of the black colored product (black stains) was eliminated by molding was measured. The results are shown in Table-1.
実施例2
実施例1と同様の方法でポリカーボネート(以下略号P
Cで示す)黒着色品の洗浄を試みた。その結果を表−1
に示す。Example 2 Polycarbonate (hereinafter abbreviated as P) was prepared in the same manner as in Example 1.
An attempt was made to clean a black-colored product (indicated by C). Table 1 shows the results.
Shown below.
比較例2
比較例1と同様の方法で、メルトフローレイト35 g
/ 10分(溶融粘度低い)のAS樹脂にガラス繊維
を20重量%添加したものを成形機に投入し射出操作に
より排出後、pc樹脂無色品を成形して、残留物の影響
の無(なるまでの必要樹脂量と所要時間を測定した。そ
の結果を表−1に示す。Comparative Example 2 In the same manner as Comparative Example 1, the melt flow rate was 35 g.
/ 10 minutes (low melt viscosity) AS resin added with 20% by weight of glass fiber is put into a molding machine, discharged by injection operation, and a colorless PC resin product is molded to avoid the influence of residue (naru). The amount of resin required and the time required to achieve this were measured.The results are shown in Table 1.
実施例3
ポリメチルメタクリレート(PMMA)の色換えに、表
−1に示す本発明の洗浄剤(含水AS樹脂にPMMAを
30重量%予備ブレンドしたもの)を使用し、実施例1
と同様に測定を行った。その結果を表−1に示す。Example 3 To change the color of polymethyl methacrylate (PMMA), the cleaning agent of the present invention shown in Table 1 (pre-blend of 30% by weight of PMMA in water-containing AS resin) was used.
Measurements were carried out in the same manner. The results are shown in Table-1.
比較例3
PMMAの色換えに、PMMAの無色品を使用し、実施
例3と同様に測定を行った。その結果を表−1に示す。Comparative Example 3 A colorless product of PMMA was used to change the color of PMMA, and measurements were performed in the same manner as in Example 3. The results are shown in Table-1.
実施例4
一般用ボリスチレン樹脂(GP)の色換えに、表−1に
示す本発明の洗浄剤(含水樹脂ASにGPを30%予備
ブレンドしたもの)を使用し、実施例1と同様に測定を
行った。その結果を表−1に示す。Example 4 The cleaning agent of the present invention shown in Table 1 (30% pre-blend of GP in water-containing resin AS) was used to change the color of general-use polystyrene resin (GP), and measurements were carried out in the same manner as in Example 1. I did it. The results are shown in Table-1.
比較例4
GPの色換えに、GP無色品を使用し、実施例4と同様
に測定を行った。その結果を表−1に示す。Comparative Example 4 A colorless GP product was used to change the color of GP, and measurements were performed in the same manner as in Example 4. The results are shown in Table-1.
比較例5
ABS黒着色品の洗浄に、従来の半溶融タイプ洗浄剤を
用い、実施例1と同様に測定を行った。Comparative Example 5 Measurements were carried out in the same manner as in Example 1, using a conventional semi-melting type cleaning agent to clean ABS black colored products.
その結果、着色の影響は、2kgの使用量で無くなった
が、ABS無色品での成形で、洗浄剤が異物として混入
し、分解掃除を実施せざるを得なかった。結果を表−1
に示す
比較例6
ABS黒着色品の洗浄に、従来の完全溶融タイプの洗浄
剤を用い、実施例1と同様に測定を行った。その結果を
表−1に示す。As a result, the effect of coloring disappeared after using only 2 kg, but cleaning agent was mixed in as a foreign substance when molding with colorless ABS products, and it was necessary to disassemble and clean it. Table 1 shows the results.
Comparative Example 6 shown in Example 6 A conventional completely melting type cleaning agent was used to clean ABS black-colored products, and measurements were performed in the same manner as in Example 1. The results are shown in Table-1.
比較例7
ABS黒着色品の洗浄に、従来のブレンドタイプの洗浄
剤を用い、実施例1と同様に測定を行った。その結果を
表−1に示す。Comparative Example 7 Measurements were carried out in the same manner as in Example 1, using a conventional blend type cleaning agent to clean ABS black colored products. The results are shown in Table-1.
(以下余白)
[発明の効果]
本発明は、以上説明の通りのものであり、次の効果を奏
するものである。(The following is a blank space) [Effects of the Invention] The present invention is as described above, and has the following effects.
(1)少量にて高い洗浄効果が得られるので、残留物を
置き換えるために多量の成形材料を無駄に消費すること
を防止できる。(1) Since a high cleaning effect can be obtained with a small amount, it is possible to prevent a large amount of molding material from being wasted in order to replace the residue.
(2)通常の成形操作で洗浄ができ、特別な操作を必要
としないので、使用しやすい。(2) It is easy to use because it can be cleaned by normal molding operations and no special operations are required.
Claims (1)
0℃・10kg)の熱可塑性合成樹脂に水分を含有させ
た洗浄樹脂を少なくとも一部に含み、メルトフローレイ
トが1〜30g/10分(220℃・10kg)で全体
の水分量が0.5〜5重量%に調整された熱可塑性樹脂
70〜95重量%と、ガラス繊維30〜5重量%とから
なることを特徴とする成形機用洗浄剤。(1) Melt flow rate is 1 to 30 g/10 minutes (22
Contains at least a part of a cleaning resin made by adding moisture to a thermoplastic synthetic resin (0℃・10kg), has a melt flow rate of 1 to 30g/10 minutes (220℃・10kg), and has a total moisture content of 0.5 A cleaning agent for a molding machine characterized by comprising 70 to 95% by weight of a thermoplastic resin adjusted to 5% by weight and 30 to 5% by weight of glass fiber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1128759A JP2676550B2 (en) | 1989-05-24 | 1989-05-24 | Cleaning agent for molding machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1128759A JP2676550B2 (en) | 1989-05-24 | 1989-05-24 | Cleaning agent for molding machines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02308900A true JPH02308900A (en) | 1990-12-21 |
JP2676550B2 JP2676550B2 (en) | 1997-11-17 |
Family
ID=14992763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1128759A Expired - Lifetime JP2676550B2 (en) | 1989-05-24 | 1989-05-24 | Cleaning agent for molding machines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2676550B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0453859A2 (en) * | 1990-04-21 | 1991-10-30 | Bayer Ag | Cleaning of apparatuses used in plastic manufacturing |
US5298078A (en) * | 1990-11-20 | 1994-03-29 | Asahi Kasei Kogyo Kabushiki Kaisha | Cleaning composition for a molding machine and a cleaning method |
JP2001138339A (en) * | 1999-11-16 | 2001-05-22 | Nitto Kako Kk | Resin composition for cleaning plastic molding machine/ extruder |
US6551411B1 (en) | 1999-03-24 | 2003-04-22 | Asahi Kasei Kabushiki Kaisha | Detergent composition |
EP2735606A1 (en) | 2012-11-22 | 2014-05-28 | Shin-Etsu Chemical Co., Ltd. | Extrusion or injection molding machine purging composition and method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50102654A (en) * | 1974-01-16 | 1975-08-14 | ||
JPS58149998A (en) * | 1982-03-02 | 1983-09-06 | 東洋インキ製造株式会社 | Detergent composition |
-
1989
- 1989-05-24 JP JP1128759A patent/JP2676550B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50102654A (en) * | 1974-01-16 | 1975-08-14 | ||
JPS58149998A (en) * | 1982-03-02 | 1983-09-06 | 東洋インキ製造株式会社 | Detergent composition |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0453859A2 (en) * | 1990-04-21 | 1991-10-30 | Bayer Ag | Cleaning of apparatuses used in plastic manufacturing |
US5298078A (en) * | 1990-11-20 | 1994-03-29 | Asahi Kasei Kogyo Kabushiki Kaisha | Cleaning composition for a molding machine and a cleaning method |
US6551411B1 (en) | 1999-03-24 | 2003-04-22 | Asahi Kasei Kabushiki Kaisha | Detergent composition |
JP2001138339A (en) * | 1999-11-16 | 2001-05-22 | Nitto Kako Kk | Resin composition for cleaning plastic molding machine/ extruder |
JP4670110B2 (en) * | 1999-11-16 | 2011-04-13 | 日東化工株式会社 | Cleaning resin composition for plastic molding machines and extruders |
EP2735606A1 (en) | 2012-11-22 | 2014-05-28 | Shin-Etsu Chemical Co., Ltd. | Extrusion or injection molding machine purging composition and method |
US9222063B2 (en) | 2012-11-22 | 2015-12-29 | Shin-Etsu Chemical Co., Ltd. | Extrusion or injection molding machine purging composition and method |
Also Published As
Publication number | Publication date |
---|---|
JP2676550B2 (en) | 1997-11-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101140190B1 (en) | Purging agent and process for purging a resin molding machine with the same | |
US6001188A (en) | Substituted pyrrolidone plasticized thermoplastic resin useful as a plastic processing equipment cleaning compound | |
MXPA97002622A (en) | Plastified thermoplastic resin of pirrolidone substituted, useful as a cleaning compound of a plast processing equipment | |
JPH02308900A (en) | Detergent for molding machine | |
CA2371041C (en) | Gel purge formulations and methods of cleaning extruders by using the same | |
JP3185070B2 (en) | Cleaning agent for molding machines | |
JPH02308899A (en) | Detergent for molding machine | |
JP4101596B2 (en) | Excellent cleaning composition | |
JP3218422B2 (en) | Cleaning agent for molding machines | |
JPH04187410A (en) | Washing agent for molding machine and manufacturing method thereof | |
JP2561685B2 (en) | Cleaning agent for molding machine | |
JP2976142B2 (en) | Cleaning agent for molding machines | |
JP2884429B2 (en) | Cleaning agent for molding machines | |
JPH0624724B2 (en) | Thermoplastic resin composition for cleaning melt-kneading device | |
JPH1081898A (en) | Cleaning agent | |
JP4447793B2 (en) | Cleaning composition | |
JP2501218B2 (en) | Cleaning agent for molding machine | |
JPS6366245A (en) | Thermoplastic resin composition | |
JP3185089B2 (en) | Molding machine cleaning method | |
JP2001150456A (en) | Detergent for molding machine | |
JPH04183799A (en) | Detergent for molding machine | |
CA1335780C (en) | Agent and process for removing contaminants, in particular material residues, in poorly accessible machine parts | |
EP0363493A1 (en) | Purging agent for plastic molding machines and extruders | |
JPH04138222A (en) | Cleaning agent for resin molder | |
JP2001071333A (en) | Cleaning agent for molding machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090725 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090725 Year of fee payment: 12 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090725 Year of fee payment: 12 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
EXPY | Cancellation because of completion of term |