JPH0952960A - Manufacturing method of antistatic resin products - Google Patents
Manufacturing method of antistatic resin productsInfo
- Publication number
- JPH0952960A JPH0952960A JP7225972A JP22597295A JPH0952960A JP H0952960 A JPH0952960 A JP H0952960A JP 7225972 A JP7225972 A JP 7225972A JP 22597295 A JP22597295 A JP 22597295A JP H0952960 A JPH0952960 A JP H0952960A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- product
- raw material
- metal
- aqueous solution
- 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
- 229920005989 resin Polymers 0.000 title claims abstract description 61
- 239000011347 resin Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000007864 aqueous solution Substances 0.000 claims abstract description 13
- 150000002736 metal compounds Chemical class 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000004898 kneading Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 15
- 239000002184 metal Substances 0.000 abstract description 15
- 238000001125 extrusion Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 abstract description 2
- 229920005672 polyolefin resin Polymers 0.000 abstract description 2
- 229920005990 polystyrene resin Polymers 0.000 abstract description 2
- 229920000915 polyvinyl chloride Polymers 0.000 abstract description 2
- 239000004800 polyvinyl chloride Substances 0.000 abstract description 2
- 229910052723 transition metal Inorganic materials 0.000 abstract description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract 2
- 241001131796 Botaurus stellaris Species 0.000 abstract 1
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 21
- 239000004743 Polypropylene Substances 0.000 description 10
- 229920001155 polypropylene Polymers 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000002216 antistatic agent Substances 0.000 description 7
- 229910021645 metal ion Inorganic materials 0.000 description 7
- 239000008188 pellet Substances 0.000 description 5
- -1 for example Polymers 0.000 description 4
- 238000010008 shearing Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920013730 reactive polymer Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 235000014347 soups Nutrition 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001734 carboxylic acid salts Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229920006302 stretch film Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Reinforced Plastic Materials (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、帯電防止性樹脂製
品の製造方法に関するものである。TECHNICAL FIELD The present invention relates to a method for producing an antistatic resin product.
【０００２】[0002]
【従来の技術】樹脂製品は、帯電し易いため、ホコリが
付着して外観が損なわれ易く、また、静電気による種々
のトラブルを惹起し易い。樹脂製品の帯電防止方法とし
ては、樹脂製品の表面に界面活性剤（帯電防止剤）を塗
布する方法が知られている。斯かる方法は、簡便で速効
性を有するが、樹脂製品の表面が粘着性を帯びると言う
欠点がある。また、帯電防止剤が容易に剥離して帯電防
止性能の耐久性に欠けると言う欠点がある。2. Description of the Related Art Since resin products are easily charged, dust is likely to adhere to them and their appearance is easily damaged, and various troubles due to static electricity are likely to occur. As a method of preventing the static electricity of a resin product, a method of applying a surfactant (antistatic agent) to the surface of the resin product is known. Although such a method is simple and quick-acting, it has a drawback that the surface of the resin product is tacky. Further, there is a drawback that the antistatic agent is easily peeled off and the antistatic performance lacks in durability.
【０００３】一方、長期に渡って安定した帯電防止性能
を得る方法として、樹脂自体に予め界面活性剤（帯電防
止剤）を練り込む方法が採用されている。練り込み法
は、上記の塗布法と異なり、表面の帯電防止層が失われ
ても、濃度勾配によって内部の帯電防止剤が表面に拡散
して新たな帯電防止層が表面に形成されるため、帯電防
止性能を長期間に渡って維持し得ると言われている。On the other hand, as a method for obtaining stable antistatic performance over a long period of time, a method of kneading a surfactant (antistatic agent) into the resin itself in advance has been adopted. The kneading method, unlike the above coating method, even if the antistatic layer on the surface is lost, since the internal antistatic agent diffuses to the surface due to the concentration gradient and a new antistatic layer is formed on the surface, It is said that the antistatic performance can be maintained for a long period of time.
【０００４】しかしながら、練り込み法は、帯電防止剤
が表面にブリードアウトすることを前提としているた
め、塗布法の場合と同様、樹脂製品の表面が粘着性を帯
びると言う欠点がある。更に、帯電防止剤として導電性
カーボンブラツクや金属粉を使用する方法も知られてい
るが、導電性カーボンブラツクの場合は樹脂製品の透明
性を犠牲にする必要があり、金属粉の場合はマスターバ
ッチ法の採用によっても樹脂中への均一な練り込みが困
難である。更に、帯電防止剤として反応性ポリマーを使
用する方法も知られているが、斯かる反応性ポリマーは
高価であると言う欠点がある。However, since the kneading method is premised on that the antistatic agent bleeds out to the surface, it has a drawback that the surface of the resin product is tacky, as in the case of the coating method. Furthermore, a method of using conductive carbon black or metal powder as an antistatic agent is also known, but in the case of conductive carbon black, it is necessary to sacrifice the transparency of the resin product, and in the case of metal powder, master Even if the batch method is adopted, it is difficult to uniformly knead into the resin. Further, a method of using a reactive polymer as an antistatic agent is also known, but such a reactive polymer has a drawback that it is expensive.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記実情に
鑑みなされたものであり、その目的は、樹脂製品の透明
性を損なうことなしに長期間に渡って帯電防止性能を維
持し得る、帯電防止性樹脂製品の経済的有利な製造方法
を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to maintain antistatic performance for a long period of time without impairing the transparency of resin products, An object of the present invention is to provide an economically advantageous method for producing an antistatic resin product.
【０００６】[0006]
【課題を解決するための手段】すなわち、本発明の要旨
は、原料樹脂と金属化合物の水溶液とを混合し、必要に
応じて水分を除去した後、溶融混練して押出成形するこ
とを特徴とする帯電防止性樹脂製品の製造方法に存す
る。That is, the gist of the present invention is that a raw material resin and an aqueous solution of a metal compound are mixed, water is removed if necessary, and then melt-kneading and extrusion molding are performed. The method for producing an antistatic resin product according to claim 1.
【０００７】[0007]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明において、原料樹脂としては、熱可塑性樹脂であ
る限り特に制限はなく、例えば、ポリエチレン、ポリプ
ロピレン等のポリオレフィン樹脂、ポリ塩化ビニル樹
脂、ポリ塩化ビニリデン樹脂、ポリスチレン樹脂、ポリ
スチレン−アクリロニトリル共重合体樹脂、ＡＢＳ樹
脂、ポリエステル樹脂、ポリアミド樹脂、ポリアクリル
酸エステル樹脂、ポリウレタン樹脂などが挙げられる。
これらの原料樹脂は、通常、適宜の大きさのペレットと
して使用される。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
In the present invention, the raw material resin is not particularly limited as long as it is a thermoplastic resin, for example, polyolefin resin such as polyethylene, polypropylene, polyvinyl chloride resin, polyvinylidene chloride resin, polystyrene resin, polystyrene-acrylonitrile copolymer resin , ABS resin, polyester resin, polyamide resin, polyacrylic acid ester resin, polyurethane resin and the like.
These raw material resins are usually used as pellets of appropriate size.
【０００８】一方、金属化合物としては、帯電防止の観
点からは特に制限はなく、各種金属の難溶性ないし水溶
性の金属化合物が使用される。具体的には、例えば、元
素周期率表の３周期または４周期であって１Ａ族または
２Ａ族に属する典型金属元素（Ｎａ、Ｍｇ、Ｋ、Ｃａ）
や４周期の遷移金属元素（Ｖ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎ
ｉ、Ｃｕ、Ｚｎ等）の炭酸塩、塩化物、蓚酸塩などが挙
げられる。On the other hand, the metal compound is not particularly limited from the viewpoint of antistatic property, and a hardly soluble or water-soluble metal compound of various metals is used. Specifically, for example, a typical metal element (Na, Mg, K, Ca) belonging to the 1A group or the 2A group having 3 or 4 periods in the periodic table of elements.
And 4-period transition metal elements (V, Mn, Fe, Co, N
i, Cu, Zn, etc.) carbonates, chlorides, oxalates, and the like.
【０００９】本発明において、上記の金属化合物は単品
である必要はなく、各種の金属成分含む混合物であって
もよい。従って、本発明においては、金属化合物とし
て、例えば、安価な苦汁なども使用し得る。苦汁（にが
り）は、製塩の副産物として得られ、１００ｇ当たり、
概略、ＭｇＣｌ2 ：１５〜１９ｇ、ＭｇＳＯ4 ：６〜９
ｇ、ＫＣｌ：２〜４ｇ、ＮａＣｌ：２〜４ｇ、ＭｇＢｒ
2 ：０．２〜０．４ｇを含む。In the present invention, the above metal compound does not have to be a single product, and may be a mixture containing various metal components. Therefore, in the present invention, as the metal compound, for example, cheap bitter soup may be used. Bitter soup (nigari) is obtained as a by-product of salt production, and per 100 g,
Schematic, MgCl 2: 15~19g, MgSO 4 : 6~9
g, KCl: 2 to 4 g, NaCl: 2 to 4 g, MgBr
2 : Contains 0.2 to 0.4 g.
【００１０】本発明の樹脂製品を特に食品用途に供する
場合、上記の様な天然のミネラル源は、市場の天然志向
の考えに適合すると共に安全性に優れる等の観点から好
適に使用される。また、本発明においては、上記金属の
カルボン酸塩の様な有機金属塩も好適に使用することが
出来る。When the resin product of the present invention is particularly applied to foods, the above-mentioned natural mineral source is preferably used from the viewpoints of meeting the natural idea of the market and being excellent in safety. Further, in the present invention, an organic metal salt such as a carboxylic acid salt of the above metal can also be preferably used.
【００１１】先ず、本発明においては、上記金属化合物
の水溶液を調製する。次に、本発明においては、原料樹
脂と金属化合物の水溶液とを混合し、必要に応じて水分
を除去して乾燥する。斯かる乾燥は、例えば、加水分解
し易い原料樹脂の場合には必須とされる。原料樹脂と金
属化合物の水溶液との混合は、通常の混合装置を使用し
て行われるが、剪断力が大きく混合効率が高い混合装置
を使用するのが好ましい。First, in the present invention, an aqueous solution of the above metal compound is prepared. Next, in the present invention, the raw material resin and an aqueous solution of a metal compound are mixed, water is removed as necessary, and drying is performed. Such drying is essential, for example, in the case of a raw material resin which is easily hydrolyzed. The mixing of the raw material resin and the aqueous solution of the metal compound is carried out by using an ordinary mixer, but it is preferable to use a mixer having a large shearing force and a high mixing efficiency.
【００１２】上記の剪断力が大きい混合装置としては、
例えば、カワタ社製の「スーパーミキサー」が挙げられ
る。この装置は、混合タンク内に配置された回転軸の上
下に上羽根と下羽根とを備え、そして、例えば、上羽根
として、リングの内部に十字アームを配置し且つリング
の外周には２個の水平アームを対向する位置に配置して
十字アームの交点に軸孔が配置された形状の羽根（Ｓ型
標準羽根）を使用し、下羽根として、くの字型アームと
逆くの字型アームとを直線状に連結して当該連結に軸孔
が配置された形状の羽根（ＢＬ型標準羽根）を使用し、
回転軸を５００〜１５００ｒｐｍの高速回転させること
により、大きな剪断力と高い混合効率を得ることが出来
る。従って、上記の「スーパーミキサー」によれば、原
料樹脂とこれに混入された金属化合物の水溶液とは、１
０〜６０分間の処理により効率良く混合される。そし
て、発生する摩擦熱によって水分の除去が同時に行われ
る。As the above-mentioned mixing device having a large shearing force,
For example, there is a "super mixer" manufactured by Kawata. This device is provided with upper and lower blades above and below a rotary shaft arranged in a mixing tank, and, for example, as an upper blade, a cross arm is arranged inside the ring and two pieces are provided on the outer circumference of the ring. Blades (S type standard blades) with horizontal holes arranged at opposite positions and shaft holes arranged at the intersections of the cross arms are used as the lower blades Using a blade (BL type standard blade) in which the arm and the arm are linearly connected and a shaft hole is arranged in the connection,
By rotating the rotating shaft at a high speed of 500 to 1500 rpm, a large shearing force and high mixing efficiency can be obtained. Therefore, according to the above-mentioned "super mixer", the raw material resin and the aqueous solution of the metal compound mixed therein are 1
Efficient mixing is achieved by treatment for 0 to 60 minutes. Then, the frictional heat generated simultaneously removes water.
【００１３】原料樹脂と金属化合物の水溶液との混合割
合は、目的とする帯電防止性能によって任意に選択する
ことが出来る。例えば、樹脂製品の表透明性を損なうこ
となく有効な帯電防止を達成するためには、樹脂製品の
表面抵抗は１×１０9 〜１×１０12Ω／ｃｍ程度にする
のが好ましく、本発明においては、樹脂製品に対する金
属成分の濃度を通常５〜２００ｐｐｍ、好ましくは１０
〜１００ｐｐｍにすることによって上記の帯電防止を達
成することが出来る。そして、斯かる少量の金属成分の
使用によって優れた帯電防止性能を発揮し得ると言う点
は本発明の１つの特徴である。The mixing ratio of the raw material resin and the aqueous solution of the metal compound can be arbitrarily selected depending on the desired antistatic performance. For example, the surface resistance of the resin product is preferably about 1 × 10 9 to 1 × 10 12 Ω / cm in order to achieve effective antistatic properties without impairing the surface transparency of the resin product. In, the concentration of the metal component relative to the resin product is usually 5 to 200 ppm, preferably 10
The above-mentioned antistatic property can be achieved by adjusting the amount to -100 ppm. It is one of the characteristics of the present invention that excellent antistatic performance can be exhibited by using such a small amount of metal component.
【００１４】上記の様な低濃度の金属成分の均一分散に
は、所謂マスターバッチ方式を採用するのが好ましい。
従って、適当な濃度として例えば２．５〜６重量％の金
属イオン含有水溶液を使用してマザー樹脂を製造する場
合は、原料樹脂２５Ｋｇに対して１００〜３００ｍｌの
上記の水溶液を混合し、０．０１〜０．０８重量％の金
属を含むマザー樹脂を調製し、そして、その１〜１０重
量％をバージン原料樹脂と混合する様にするのが好まし
い。To uniformly disperse the low-concentration metal component as described above, it is preferable to employ a so-called masterbatch system.
Therefore, when a mother resin is produced using an aqueous solution containing a metal ion of, for example, 2.5 to 6% by weight as an appropriate concentration, 100 to 300 ml of the above aqueous solution is mixed with 25 kg of the raw material resin, and It is preferable to prepare a mother resin containing 01 to 0.08% by weight of a metal, and to mix 1 to 10% by weight thereof with a virgin raw material resin.
【００１５】次に、本発明においては、金属イオンと混
合された原料樹脂を溶融混練して押出成形する。この場
合、ベント付の単軸または２軸スクリュー混練押出機が
好適に使用される。斯かる押出機は、通常、樹脂の改
質、例えばグラフト反応などの高分子付加反応のために
使用される公知の押出機である。Next, in the present invention, the raw material resin mixed with the metal ions is melt-kneaded and extruded. In this case, a single-screw or twin-screw kneading extruder with a vent is preferably used. Such an extruder is a known extruder usually used for modifying a resin, for example, a polymer addition reaction such as a graft reaction.
【００１６】金属イオンと混合された原料樹脂の溶融混
練は、通常、樹脂の融点（ｍｐ）より１００〜１５０℃
高い溶融温度、７００〜７６０ｍｍＨｇの真空度で適宜
の滞留時間の条件下に行われる。押出成形品の形態は、
前述のマザー樹脂を調製する場合はペレットとされる。
その他の場合は、押出機に付設される口金や金型の種類
に従い、ペレットの他、シートや各種の成形品とされ
る。The melt-kneading of the raw material resin mixed with the metal ion is usually performed at 100 to 150 ° C. from the melting point (mp) of the resin.
It is carried out under conditions of a high melting temperature, a vacuum degree of 700 to 760 mmHg, and an appropriate residence time. The form of the extruded product is
When the above-mentioned mother resin is prepared, it is made into pellets.
In other cases, according to the type of die and die attached to the extruder, pellets, sheets, and various molded products are used.
【００１７】そして、マザー樹脂の場合は、単軸または
２軸スクリュー混練押出機を使用してマザー樹脂とバー
ジン原料樹脂とを溶融混合し、上記と同様、ペレットの
他、シートや各種の成形品として押し出される。そし
て、延伸加工により、シートからはラップフイルム（ス
トレッチフイルム）を初めとする各種のフイルムや合成
紙を製造することが出来、また、真空成形、圧空成形、
プレス成形、ブロー成形、インジェクション成形、発泡
成形により、トレーやボトル等の各種の成形品を製造す
ることが出来る。In the case of the mother resin, the mother resin and the virgin raw material resin are melt-mixed by using a single-screw or twin-screw kneading extruder, and pellets, sheets and various molded products other than pellets are used as described above. Is extruded as. Then, by stretching, various films such as wrap film (stretch film) and synthetic paper can be produced from the sheet, and also vacuum forming, pressure forming,
Various molded products such as trays and bottles can be manufactured by press molding, blow molding, injection molding, and foam molding.
【００１８】なお、本発明の製造方法で得られた樹脂製
品において、樹脂自体に練り込まれた金属イオンの状態
は、必ずしも明らかではないが、長期間に渡って帯電防
止性能を維持し得ることから、樹脂マトリックスとの何
らかの形で結合していると推定される。In the resin product obtained by the production method of the present invention, the state of the metal ions kneaded into the resin itself is not always clear, but the antistatic performance can be maintained for a long period of time. From this, it is presumed that it is bound to the resin matrix in some form.
【００１９】[0019]
【実施例】以下、本発明を実施例によって更に詳細に説
明するが、本発明は、その要旨を超えない限り、以下の
実施例に限定されるものではない。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.
【００２０】実施例１ 苦汁を使用して５．２重量％の金属イオン含有水溶液を
得た。金属イオンの濃度は、原子吸光度計によって測定
した。次いで、カワタ社製のスーパーミキサーを使用
し、乾燥ポリプロピレン（ＰＰ）樹脂チップ２５Ｋｇに
上記の水溶液２００ｍｌを分割混入しつつ１４５０ｒｐ
ｍの条件下で３０分間混合処理した。得られたＰＰ樹脂
チップの金属濃度は０．４１重量％であった。Example 1 Using a bitter broth, a 5.2% by weight aqueous solution containing metal ions was obtained. The metal ion concentration was measured by an atomic absorption spectrometer. Then, using a super mixer made by Kawata Co., Ltd., while mixing 200 ml of the above aqueous solution into 25 kg of dry polypropylene (PP) resin chips in a divided manner, 1450 rp
Mixing treatment was performed for 30 minutes under the condition of m. The metal concentration of the obtained PP resin chip was 0.41% by weight.
【００２１】次いで、ベント付単軸スクリュー混練押出
機を使用し、上記のＰＰ樹脂チップの溶融押出を行って
マザーＰＰ樹脂を得た。溶融押出条件は、平均溶融温
度：２２０℃、平均真空度：７３０ｍｍＨｇ、平均吐出
量２００Ｋｇ／Ｈｒ、平均樹脂圧：２３０Ｋｇとした。
次いで、２軸スクリュー混練押出機を使用し、上記のマ
ザーＰＰ樹脂とバージンＰＰ樹脂とを５：９５重量比で
混合してシート状に押し出した後、延伸処理して厚さ３
０μｍの二軸延伸フイルムを得た。得られたフイルム
は、金属濃度：２０ｐｐｍ／ｇ−樹脂、表面抵抗：１×
１０12Ω／ｃｍであった。Then, using a single screw kneading extruder with a vent, the above PP resin chips were melt extruded to obtain a mother PP resin. The melt extrusion conditions were: average melt temperature: 220 ° C., average vacuum degree: 730 mmHg, average discharge rate 200 Kg / Hr, average resin pressure: 230 Kg.
Then, using a twin-screw kneading extruder, the above mother PP resin and virgin PP resin were mixed at a weight ratio of 5:95 and extruded into a sheet, and then stretched to a thickness of 3
A 0 μm biaxially stretched film was obtained. The obtained film has a metal concentration of 20 ppm / g-resin and a surface resistance of 1 ×.
It was 10 12 Ω / cm.
【００２２】比較のために、マザーＰＰ樹脂を配合する
ことなく上記と同一の方法で厚さ３０μｍの二軸延伸フ
イルムを得た。得られたフイルムの表面抵抗は１×１０
14Ω／ｃｍであった。また、上記の各ＰＰシートの透明
度を測定した結果はほぼ同一であった。For comparison, a biaxially stretched film having a thickness of 30 μm was obtained by the same method as above without blending the mother PP resin. The surface resistance of the obtained film is 1 × 10.
It was 14 Ω / cm. The results of measuring the transparency of each of the above PP sheets were almost the same.
【００２３】そして、上記の実施例で得られたフイルム
について、３年経過後に表面抵抗を測定した結果は１×
１０12Ω／ｃｍであった。この結果より、本発明におい
て樹脂自体に練り込まれた金属イオンは、フイルム表面
へのブリードアウトによって失われていないことが判
る。なお、３年経過後にフイルムの透明度も何ら損なわ
れていなかった。Then, the surface resistance of the film obtained in the above example was measured after 3 years, and the result was 1 ×.
It was 10 12 Ω / cm. From this result, it is understood that the metal ions kneaded into the resin itself in the present invention are not lost by the bleed-out to the film surface. The transparency of the film was not impaired after 3 years.
【００２４】[0024]
【発明の効果】以上説明した本発明によれば、樹脂製品
の透明性を損なうことなしに長期間に渡って帯電防止性
能を維持し得る、帯電防止性樹脂製品の経済的有利な製
造方法が提供される。According to the present invention described above, there is provided an economically advantageous method for producing an antistatic resin product capable of maintaining the antistatic performance for a long period of time without impairing the transparency of the resin product. Provided.
Claims (1)
し、必要に応じて水分を除去した後、溶融混練して押出
成形することを特徴とする帯電防止性樹脂製品の製造方
法。1. A method for producing an antistatic resin product, which comprises mixing a raw material resin and an aqueous solution of a metal compound, removing water if necessary, and then melt-kneading and extruding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7225972A JPH0952960A (en) | 1995-08-10 | 1995-08-10 | Manufacturing method of antistatic resin products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7225972A JPH0952960A (en) | 1995-08-10 | 1995-08-10 | Manufacturing method of antistatic resin products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0952960A true JPH0952960A (en) | 1997-02-25 |
Family
ID=16837777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7225972A Pending JPH0952960A (en) | 1995-08-10 | 1995-08-10 | Manufacturing method of antistatic resin products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0952960A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007217210A (en) * | 2006-02-15 | 2007-08-30 | Tokyo Yogyo Co Ltd | Basic refractory and method for producing the same |
-
1995
- 1995-08-10 JP JP7225972A patent/JPH0952960A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007217210A (en) * | 2006-02-15 | 2007-08-30 | Tokyo Yogyo Co Ltd | Basic refractory and method for producing the same |
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