JPH04118809A - Electric charge-limited synthetic resin plate - Google Patents
Electric charge-limited synthetic resin plateInfo
- Publication number
- JPH04118809A JPH04118809A JP2128567A JP12856790A JPH04118809A JP H04118809 A JPH04118809 A JP H04118809A JP 2128567 A JP2128567 A JP 2128567A JP 12856790 A JP12856790 A JP 12856790A JP H04118809 A JPH04118809 A JP H04118809A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- solvent
- film
- base material
- conductive layer
- 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
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 34
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 34
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920005668 polycarbonate resin Polymers 0.000 claims description 40
- 239000004431 polycarbonate resin Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 39
- 239000002904 solvent Substances 0.000 abstract description 21
- 238000000576 coating method Methods 0.000 abstract description 17
- 239000011248 coating agent Substances 0.000 abstract description 15
- 230000003287 optical effect Effects 0.000 abstract description 14
- 239000000758 substrate Substances 0.000 abstract description 8
- 230000035515 penetration Effects 0.000 abstract 2
- 229920005989 resin Polymers 0.000 description 17
- 239000011347 resin Substances 0.000 description 17
- 239000007788 liquid Substances 0.000 description 10
- 229920000915 polyvinyl chloride Polymers 0.000 description 9
- 239000004800 polyvinyl chloride Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 7
- 239000004925 Acrylic resin Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- -1 Snug) Substances 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000013557 residual solvent Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Non-Insulated Conductors (AREA)
Abstract
Description
【発明の詳細な説明】
【産業上の利用分野１
本発明は、合成樹脂基材に導電層を積層した制電性合成
樹脂板に関する。
【従来の技術１
制電性合成樹脂板は表面抵抗が１０ｂ〜１０”Ω程度で
あればクリーン環境を維持し得る有効な帯電防止機能な
いし静電気防除機能を発揮することが判っている。
従来の制電性合成樹脂板には、ポリ塩化ビニル樹脂（Ｐ
Ｖ Ｃ）板を基材とし、その基材を導電層で表面被覆
したものが知られている。このものの導電層は、ＰＶＣ
なとのバインダー樹脂と金属粉（Ｓｎｕｇなど）と溶剤
と分散剤や安定剤とを所定の配合割合で含む導電性塗布
液を基材に塗布して乾燥させ、そのドライ厚みを２〜５
μにして表面抵抗１０６〜１０８Ω程度にしたものであ
る。また、Ｐ■Ｃ基材と導電層とを含む全厚が５ｍの無
色透明な従来の制電性合成樹脂板では、透明性を表す指
標である全光線透過率が７２．６χ、平行光線透過率が
６９．８χ、曇り価が３．８χ（Ｊ夏Ｓ Ｋ ６７３５
による。）であり、比較的高い透明性を有しているとい
える。
このような制電性合成樹脂板は、半導体などの電子部品
や電気部品、精密機械、医薬や食品、さらにはバイオテ
クノロジーなどの種々の分野におけるクリーン環境を必
要とする場所でパレットや各種機器類のケース、あるい
は遮蔽板などとして既に幅広く用いられているけれども
、その用途はさらに拡大する傾向にある。そして、用途
によっては従来の制電性合成樹脂板よりも透明性などの
光学的性質や耐衝撃強度などの機械的性質、さらには熱
的性質のさらに優れたものが要求されることも多層性じ
ている。
（発明が解決しようとする課題１
そこで、合成樹脂の中でも機械的性質に優れ１いるとい
われているポリカーボネート樹脂（ＰＣ）を基材に用い
、その基材に上述の導電層を升成すれば、従来のものよ
りも機械的性質に優れ六制電性合成樹脂板が得られると
考えられる。
ところが、ＰＶＣに比べるとＰＣは耐溶剤性ζ：極端に
劣るため、基材をＰＣにした場合、導電を塗布液の塗布
された基材が塗布液の溶剤によっズ侵され、クラックを
生じたり、透明性が低下し大すすることを避けられず、
このようなものは製汐自体が困難であり、製造できたと
しても実使用４Ｓ耐え得ない、それにもかかわらず、従
来よりも頓械的性質に優れる制電性合成樹脂板を待望す
るＩＪ向は関連業界においてなお根強（存在している。
本発明は以上の事情に鑑みてなされたもので凌る。すな
わち、本発明は、基材に隔離した状１１１導電層を形成
させ得るようにすることによって、基材にＰＣを用い、
かつ導電層に溶剤を含む導１性塗布液を用いるものであ
るにもがかわらず、塗布液の溶剤によって基材が侵され
ず、表面抵抗が従来のものと遜色なく、機械的性質が従
来のものよりも格段に優れた制電性合成樹脂板を提供す
ることを目的とする。
【課題を解決するための手段１
本発明の制電性合成樹脂板は、ＰＣ製基材の表面に導電
層を有するアクリル系フィルムまたはアクリル−ブタジ
エン−スチレンフィルムが積層されているものである。
〔作 用１
上述のようにＰＣはＰｖｃに比べると耐溶剤性に極端に
劣るものの、透明性などの光学的性質や耐衝撃強度など
の機械的性質や熱的性質がＰｖｃよりも格段に優れてい
る。アクリル系フィルムは、ＰＶＣやＰＣよりも光学的
性質がさらに優れている樹脂で、現存樹脂中で最も透明
性に優れた樹脂であると共に、ＰＣに良好に接着する樹
脂である。
したがって、Ｐｃ基材とアクリル系フィルムとの積層物
である制電性合成樹脂板では、Ｐｃ基材とアクリル系フ
ィルムが良好に積層され、長期間使用しても眉間剥離を
生じることがなく、またＰＣやアクリル系フィルムの優
れた透明性が生がされ、従来のものよりも光学的性質に
優れることは勿論、Ｐｃ基材により優れた機械的性質や
熱的性質を発揮する。さらに、Ｐｃ基材やアクリル系フ
ィルムは耐紫外線性などの耐候性にも優れるため、日光
の直射条件下でも優れた耐久性を発揮する。一方、アク
リル−ブタジエン−スチレンフィルム（ＡＢＳフィルム
）はアクリル系フィルムと共にＰＣに良好に積層できる
樹脂ではあるが、透明性が若干劣り、Ｐｃ基材とＡＢＳ
フィルムとの積層物である制電性合成樹脂板では、機械
的性質や熱的性質を有する半透明あるいは不透明板とし
て用いられる。
ＰＣが耐溶剤性に劣ることによって生じる不都合は、溶
剤を含む導電性塗布液によって形成された導電層とＰｃ
基材とがアクリル系フィルムまたはＡＢＳフィルムで隔
離されていることによって解消される。
【実施例１
以下、本発明の詳細な説明する。
実施例による制電性合成樹脂板は、基材１と、表面に導
電層３を有するアクリル系フィルム２とを積層したもの
であり、積層状態は、第１図のように基材１の片側表面
だけに上記アクリル系フィルム２を積層したものでも、
第２図のように、基材ｌの両側表面に上記アクリル系フ
ィルム２．２を積層したものでもよい、そして、基材ｌ
にはＰＣが用いられている。ＰＣ基板１を二層ないし三
層構造としてもよい。
ＰＣはＰＶＣに比べると透明性などの光学的性質や耐衝
撃強度などの機械的性質、熱的性質が格段に優れている
。アクリル系フィルムは、ＰＣに良好に積層すると共に
、ＰＶｃは勿論、ＰＣよりも光学的性質がさらに優れて
いる。したがって、この制電性合成樹脂板では、Ｐｃ基
材１とアクリル系フィルム２とが長期間使用しても剥離
せず、良好な制電性能を維持し得るのみならず、ＰＣや
アクリル系フィルムの優れた透明性が生かされて従来の
ものよりも光学的性質に優れ、良好な外観を呈し、しか
もＰＣ基材１により優れた機械的性質を発揮する。さら
に、ＰＣ基材１やアクリル系フィルム２は、耐紫外線性
などの耐候性や、熱的性質にも優れるため、この制電性
合成樹脂板は、室内は勿論、゛日光の直射条件下でも優
れた耐久性を発揮するのみならず、従来の制電性合成樹
脂板では対応しきれない高温下での使用も可能になる。
切断、孔明け、接着などの加工や、常温下で曲面に曲げ
るコールドフォーミング工法も可能である。
制電性合成樹脂板の導電層３は溶剤が揮発した後のドラ
イな状態になっている。そのため、ＰＣ基材１が溶剤に
接触して侵されることはない。たとえ、導電層３に残留
溶剤が含まれているとしても、導電層３とＰＣＣ基材色
はアクリル系フィルム２によって隔離されているため、
その残留溶剤が接触してＰＣ基材１が侵されることはな
い。
導電層３を従来と同様の導電性塗布液を用いて形成して
おくと、帯電防止機能ないし静電気防除機能が従来と遜
色ないものになる。
導電層３は従来と同じ組成の導電性塗布液に弗素樹脂を
均一混入し、それをアクリル系フィルム２に塗布して乾
燥させたものでもよく、それによると、耐候性がさらに
改善される上、静電気防除機能と弗素樹脂の自滑性とが
相乗して耐汚染性が向上する。弗素樹脂をメラミン樹脂
やシリコン樹脂に置き換えてもよく、それによると表面
硬度が上がり、傷が付きにくくなる。
ｐｃ基材１としては、その分子量が２５．０００〜２８
゜０００であるものが好ましく、分子量がこの範囲であ
ると満足のいく溶融状態での流動性や成形後の強度や耐
久性が得られる０分子量が２５，０００より小さいと流
動性が高くなりすぎて成形後の強度や耐久性が低下しや
すい。分子量が２８．０００より大きいと流動性が低下
しすぎて成形が困難になりやすい。
ＰＣ基板１の厚みは３〜１０ｍ程度でよく、薄すぎると
機械的性質が損なわれやすく、厚すぎると透明性が損な
われやすい。３〜１０ＩＩＩ１１程度の厚みであると、
ＰＣ基板１の透明性を良好に保ち得ると同時に十分に大
きな機械的強度を具備させ得る。
アクリル系フィルムとして、メチルメタアクリレ−）
（ＭＭＡ）フィルムを好ましく用い得る。
積層後の剥離性、コスト、積層処理性などの諸要因を考
慮して定められるべきであり、制電性合成樹脂板の用途
がパレットやカバーや間仕切りなどである場合には３０
〜２５０μ程度の厚みのものを用いればよい。３０μよ
り薄いと導電性塗布液の溶剤による攻撃を受けて破れる
ことがあり、ＰＣ基板１との積層時の取扱いが困難にな
ることがある。
２５０μより厚いと柔軟性が乏しくなってラミネートし
にくくなり、コストアップにつながる。
他のアクリルフィルムとして、ＡＡＳ樹脂、ＡＥＳ樹脂
、ＡＳ樹脂等のアクリル樹脂との共重合樹脂やアクリル
樹脂とのブレンド樹脂の各フィルムを使うことが可能で
ある。
また、導電層を積層したフィルムとしてＡＢＳも
フィルム虐使用可能である。ＡＢＳフィルムはＰＣ基材
１との接着性や耐溶剤性がアクリル系フィルムと路間等
であるが、透明性が若干劣り、透明性制電性樹脂板には
使用できないが、半透明もしくは不透明制電性樹脂板に
は十分使用できるものである。
導電性塗布液は、バインダー樹脂と金属微粉を主とし、
そのほか分散側と安定剤を少々含むものを用いることが
で、きる。この導電性塗布液を、ＰＣ基板ｌに積層する
前のアクリル系フィルムの表面に塗布し、乾燥して溶剤
を揮発させると導電層３が形成される。こうすると、ア
クリル系フィルムをＰＣＣ基材色積層したときには導電
層３の溶剤が既に揮発して消失しているので、溶剤がＰ
Ｃ基材１に直接触れず、ＰＣ基材１にクランクや曇りな
どを生じるといった悪影響がない。
バインダー樹脂にはＰｖＣやアクリル樹脂が用いられる
。その他ＰＶＣ−酢酸ビニル共重合体、ＰｖＣ−エチレ
ン−酢酸ビニル共重合体、ＰＶＣと酢酸ビニルとのブレ
ンド物も使える。しかし、ＰｖＣ系権脂よりアクリル樹
脂の方がフィルムとの積層性が良く、金属微粉を含むバ
インダー樹脂として好ましい。
金属粉には透明性を有するＳｎＯ□の微粉末や、Ｉｎ１
０３微粉末や、ＳｎＯ，と酸化アンチモンの混合微粉末
などのような導電性金属微粉末を用い得る。
溶剤にはシクロヘキサノン、メチレンイソブチレンケト
ン（ＭＩＢＫ）を用い得、分散剤には界面滑性剤を用い
得る。
導電性塗布液を塗布して乾燥させたＭＭＡフィルムをＰ
ｖＣ基板の片側表面に積層することにより得られた透明
な制電性合成樹脂板の緒特性を次表に示す。なお、次表
にはＰｖＣ基板の表面に導電性塗布液を塗布して乾燥さ
せることより得られた従来の透明な制電性合成樹脂板の
緒特性も併記した。
（以下余白）
上表より、発明品は表面抵抗などの電気的性質が従来品
と同等で遜色ない。透明性の指標である光学的性質は従
来品も比較的優れているといえるが、発明品はそれより
もさらに優れている。機械的性質については発明品が従
来品に比べて格段に勝っている。熱的性質、特に荷重撓
み温度においては、発明品が従来品の２倍以上の高温に
対応し得るものであることが判る。
【発明の効果】
以上のように本発明は、ＰＣが耐溶剤性に極端に劣るた
めに基材に用いることができなかったという難点を、導
電層を形成させるための導電性塗布液の溶剤がＰＣに接
触しないように特別な工夫を講じたことによって兄事に
解決したものであり、しかもその特別な工夫として、Ｐ
Ｃ基材に良好に積層するアクリル系フィルムまたはＡＢ
Ｓフィルムを使用しているから、ＰＣ基材と各フィルム
とは層間剥離を生じず、長期間制電性を有する合成樹脂
板を得ることができ、しかも機械的性質も改善すること
ができたものである。特にアクリル系フィルムを用いる
と、ＰＣよりも透明性などの光学的性質に優れているか
ら、ＰＶＣよりも優れたＰＣ基材自体の光学的性質を損
なわず、しかも基材とアクリル系フィルムと導電層とに
層間剥離などの不都合を生じさせずに、優れた透明性を
有する合成樹脂板を得ることができたものである。
このような本発明の制電性合成樹脂板は、従来と遜色の
ない良好な帯電防止機能ないし静電気防除機能を発揮さ
せることができるのみならず、耐衝撃強度などの機械的
性質や透明性などの光学的性質にきわめて優れ、外観も
良好なものである。
さらに、熱的性質にも優れるため、従来の制電性合成樹
脂板では対応しきれない高温下での使用も可能になる。
そのほか、耐候性や耐久性が改善され、直射日光にさら
される条件下でもロングライフを持つ制電性合成樹脂板
となる上、切断、孔明け、接着などの加工や、常温下で
曲面に曲げるコールドフォーミング工法も可能であるな
どの利点がある。
したがって、本発明によれば、従来のものよりも過酷な
条件下で好適に使用することのできる制電性合成樹脂板
を提供することができるようになり、関連業界の要望を
満たし得るものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an antistatic synthetic resin plate in which a conductive layer is laminated on a synthetic resin base material. [Prior art 1] It is known that an antistatic synthetic resin plate exhibits an effective antistatic function or antistatic function that can maintain a clean environment if the surface resistance is about 10b to 10''Ω. The antistatic synthetic resin board is made of polyvinyl chloride resin (P
It is known that the base material is a V C) plate and the surface of the base material is coated with a conductive layer. The conductive layer of this thing is PVC
A conductive coating liquid containing Nato's binder resin, metal powder (such as Snug), solvent, dispersant, and stabilizer in a predetermined mixing ratio is applied to the substrate and dried, and the dry thickness is 2 to 5.
The surface resistance in μ is approximately 10 6 to 10 8 Ω. In addition, in a conventional colorless and transparent antistatic synthetic resin plate with a total thickness of 5 m including the P■C base material and the conductive layer, the total light transmittance, which is an index expressing transparency, is 72.6χ, parallel light transmission. rate is 69.8χ, haze value is 3.8χ (J Summer SK 6735
by. ), and can be said to have relatively high transparency. These antistatic synthetic resin plates are used on pallets and various equipment in places that require a clean environment in various fields such as semiconductors and other electronic and electrical parts, precision machinery, medicine and food, and even biotechnology. Although they are already widely used as cases and shielding plates, their uses are likely to expand further. Depending on the application, multi-layered sheets may require optical properties such as transparency, mechanical properties such as impact strength, and even better thermal properties than conventional antistatic synthetic resin plates. It's working. (Problem to be solved by the invention 1) Therefore, if polycarbonate resin (PC), which is said to have excellent mechanical properties among synthetic resins, is used as a base material, and the above-mentioned conductive layer is formed on the base material. It is thought that an antistatic synthetic resin board with superior mechanical properties than conventional ones can be obtained.However, compared to PVC, PC has extremely poor solvent resistance, so when PC is used as the base material, However, it is inevitable that the base material coated with the conductive coating liquid will be eroded by the solvent of the coating liquid, causing cracks and a significant decrease in transparency.
This type of material is difficult to manufacture, and even if it could be manufactured, it would not be able to withstand 4S of practical use.Nevertheless, antistatic synthetic resin sheets with superior mechanical properties than conventional ones are long-awaited for IJ applications. The present invention has been made in view of the above circumstances and is still very strong in the related industry. By using PC as the base material,
In addition, although the conductive layer uses a conductive coating solution containing a solvent, the base material is not attacked by the solvent in the coating solution, the surface resistance is comparable to conventional coatings, and the mechanical properties are comparable to conventional coatings. The purpose of the present invention is to provide a synthetic resin plate with antistatic properties that is significantly superior to the previous one. [Means for Solving the Problems 1] The antistatic synthetic resin board of the present invention has an acrylic film or an acrylic-butadiene-styrene film having a conductive layer laminated on the surface of a PC base material. [Function 1] As mentioned above, PC is extremely inferior in solvent resistance compared to PVC, but it is significantly superior to PVC in optical properties such as transparency, mechanical properties such as impact strength, and thermal properties. ing. Acrylic film is a resin that has even better optical properties than PVC and PC, and is the most transparent resin among existing resins, as well as a resin that adheres well to PC. Therefore, in an antistatic synthetic resin board that is a laminate of a Pc base material and an acrylic film, the Pc base material and the acrylic film are laminated well, and no peeling occurs between the eyebrows even after long-term use. In addition, the excellent transparency of PC and acrylic films is exhibited, and not only are the optical properties superior to those of conventional films, but the PC base material also exhibits superior mechanical and thermal properties. Furthermore, since the Pc base material and acrylic film have excellent weather resistance such as ultraviolet resistance, they exhibit excellent durability even under direct sunlight. On the other hand, acrylic-butadiene-styrene film (ABS film) is a resin that can be laminated well on PC together with acrylic film, but its transparency is slightly inferior and
An antistatic synthetic resin plate that is a laminate with a film is used as a translucent or opaque plate that has mechanical and thermal properties. The disadvantage caused by the poor solvent resistance of PC is that the conductive layer formed by a conductive coating solution containing a solvent and the PC
This problem can be solved by separating the base material with an acrylic film or an ABS film. Example 1 The present invention will be described in detail below. The antistatic synthetic resin board according to the example is a lamination of a base material 1 and an acrylic film 2 having a conductive layer 3 on the surface, and the laminated state is as shown in FIG. Even if the acrylic film 2 is laminated only on the surface,
As shown in FIG. 2, the above acrylic film 2.2 may be laminated on both sides of the base material L.
A PC is used for this. The PC board 1 may have a two-layer or three-layer structure. Compared to PVC, PC has much superior optical properties such as transparency, mechanical properties such as impact strength, and thermal properties. Acrylic films laminate well to PC and have even better optical properties than PC, let alone PVc. Therefore, in this antistatic synthetic resin board, the PC base material 1 and the acrylic film 2 do not peel off even after long-term use, and not only can good antistatic performance be maintained, but also the PC base material 1 and the acrylic film 2 can maintain good antistatic performance. Taking advantage of the excellent transparency of the PC base material 1, the PC base material 1 exhibits superior optical properties and a better appearance than conventional ones, and also exhibits better mechanical properties than the PC base material 1. Furthermore, the PC base material 1 and acrylic film 2 have excellent weather resistance such as ultraviolet resistance and thermal properties, so this antistatic synthetic resin board can be used not only indoors but also under direct sunlight. Not only does it exhibit excellent durability, but it can also be used at high temperatures, which conventional antistatic synthetic resin plates cannot handle. Processing such as cutting, drilling, and gluing is also possible, as well as cold forming, which involves bending it into a curved surface at room temperature. The conductive layer 3 of the antistatic synthetic resin plate is in a dry state after the solvent has evaporated. Therefore, the PC base material 1 will not be attacked by contact with the solvent. Even if the conductive layer 3 contains residual solvent, since the conductive layer 3 and the PCC base color are separated by the acrylic film 2,
The PC base material 1 will not be attacked by contact with the residual solvent. If the conductive layer 3 is formed using the same conductive coating liquid as the conventional one, the antistatic function or antistatic function will be comparable to that of the conventional one. The conductive layer 3 may be formed by uniformly mixing a fluororesin into a conductive coating liquid having the same composition as the conventional one, applying it to the acrylic film 2 and drying it, which further improves the weather resistance. , the antistatic function and the self-lubricating properties of the fluororesin work together to improve stain resistance. The fluororesin may be replaced with melamine resin or silicone resin, which increases the surface hardness and makes it less likely to be scratched. The PC base material 1 has a molecular weight of 25.000 to 28
It is preferable that the molecular weight is within this range, and satisfactory fluidity in the molten state and strength and durability after molding can be obtained.If the molecular weight is less than 25,000, the fluidity will be too high. strength and durability after molding tend to decrease. When the molecular weight is greater than 28,000, the fluidity decreases too much and molding tends to become difficult. The thickness of the PC board 1 may be about 3 to 10 m; if it is too thin, the mechanical properties are likely to be impaired, and if it is too thick, the transparency is likely to be impaired. When the thickness is about 3 to 10III11,
The transparency of the PC board 1 can be maintained well, and at the same time, it can be provided with sufficiently high mechanical strength. Methyl methacrylate (as an acrylic film)
(MMA) film can be preferably used. It should be determined in consideration of various factors such as peelability after lamination, cost, lamination processability, etc., and if the antistatic synthetic resin board is used for pallets, covers, partitions, etc.
A material having a thickness of about 250 μm may be used. If it is thinner than 30μ, it may be attacked by the solvent of the conductive coating liquid and be torn, making it difficult to handle when laminated with the PC board 1. If it is thicker than 250μ, the flexibility will be poor and it will be difficult to laminate, leading to an increase in cost. As other acrylic films, it is possible to use films made of copolymer resins with acrylic resins such as AAS resins, AES resins, and AS resins, or blend resins with acrylic resins. Further, ABS can also be used as a film having a conductive layer laminated thereon. ABS film has adhesion to the PC base material 1 and solvent resistance between acrylic films, etc., but its transparency is slightly inferior, so it cannot be used for transparent antistatic resin plates, but it is semitransparent or opaque. It can be fully used for antistatic resin plates. The conductive coating liquid mainly contains binder resin and metal fine powder.
In addition, it is possible to use a dispersant containing a small amount of stabilizer. This conductive coating liquid is applied to the surface of the acrylic film before being laminated onto the PC board 1, and the conductive layer 3 is formed by drying and volatilizing the solvent. In this way, when the acrylic film is laminated on the PCC base color, the solvent in the conductive layer 3 has already volatilized and disappeared, so the solvent is PCC.
The C base material 1 is not directly touched, and there is no adverse effect such as cranking or clouding on the PC base material 1. PvC or acrylic resin is used as the binder resin. In addition, PVC-vinyl acetate copolymers, PvC-ethylene-vinyl acetate copolymers, and blends of PVC and vinyl acetate can also be used. However, acrylic resin has better lamination properties with a film than PvC resin, and is preferable as a binder resin containing fine metal powder. The metal powder includes transparent SnO□ fine powder and In1.
03 fine powder, a mixed fine powder of SnO and antimony oxide, and the like can be used. Cyclohexanone and methylene isobutylene ketone (MIBK) can be used as the solvent, and a surface lubricant can be used as the dispersant. MMA film coated with conductive coating liquid and dried
The properties of the transparent antistatic synthetic resin plate obtained by laminating it on one surface of the vC substrate are shown in the following table. The following table also lists the characteristics of a conventional transparent antistatic synthetic resin plate obtained by applying a conductive coating liquid to the surface of a PvC substrate and drying it. (Left below) From the table above, the electrical properties of the invented product, such as surface resistance, are comparable to the conventional product. Although the conventional product can be said to have relatively good optical properties, which are an indicator of transparency, the invented product is even better. In terms of mechanical properties, the invented product is significantly superior to conventional products. In terms of thermal properties, particularly the deflection temperature under load, it can be seen that the invented product can withstand temperatures that are more than twice as high as the conventional products. Effects of the Invention As described above, the present invention solves the problem of PC being unable to be used as a base material due to its extremely poor solvent resistance. The problem was solved by taking special measures to prevent P from coming into contact with the PC, and as a special measure,
Acrylic film or AB that laminates well on C base material
Because S film is used, there is no delamination between the PC base material and each film, and a synthetic resin board with long-term antistatic properties can be obtained, and the mechanical properties have also been improved. It is something. In particular, when using an acrylic film, it has better optical properties such as transparency than PC, so it does not impair the optical properties of the PC base material itself, which is better than PVC, and is conductive between the base material and the acrylic film. It was possible to obtain a synthetic resin plate having excellent transparency without causing problems such as delamination between the layers. The antistatic synthetic resin board of the present invention can not only exhibit good antistatic function or static electricity prevention function comparable to conventional ones, but also has mechanical properties such as impact strength, transparency, etc. It has excellent optical properties and a good appearance. Furthermore, since it has excellent thermal properties, it can be used at high temperatures that conventional antistatic synthetic resin plates cannot handle. In addition, the weather resistance and durability have been improved, and the antistatic synthetic resin board has a long life even under conditions of exposure to direct sunlight, and it can be processed by cutting, drilling, gluing, etc., and can be bent into curved surfaces at room temperature. It has the advantage that cold forming construction methods are also possible. Therefore, according to the present invention, it is possible to provide an antistatic synthetic resin plate that can be suitably used under harsher conditions than conventional ones, and can meet the demands of related industries. be.
第１図と第２図は本発明の異なる二つの実施例による制
電性合成樹脂板の構造説明図である。
１・・・基材、２・・・アクリル系フィルム、３・・・
導電層1 and 2 are structural explanatory diagrams of antistatic synthetic resin plates according to two different embodiments of the present invention. 1... Base material, 2... Acrylic film, 3...
conductive layer
Claims (1)
るアクリル系フィルムまたはアクリル−ブタジエン−ス
チレンフィルムが積層されていることを特徴とする制電
性合成樹脂板。1. An antistatic synthetic resin board, characterized in that an acrylic film or an acrylic-butadiene-styrene film having a conductive layer is laminated on the surface of a polycarbonate resin base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2128567A JP2990365B2 (en) | 1990-05-17 | 1990-05-17 | Antistatic synthetic resin plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2128567A JP2990365B2 (en) | 1990-05-17 | 1990-05-17 | Antistatic synthetic resin plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04118809A true JPH04118809A (en) | 1992-04-20 |
| JP2990365B2 JP2990365B2 (en) | 1999-12-13 |
Family
ID=14987951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2128567A Expired - Lifetime JP2990365B2 (en) | 1990-05-17 | 1990-05-17 | Antistatic synthetic resin plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2990365B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005288724A (en) * | 2004-03-31 | 2005-10-20 | Sankyo Kasei Kk | Conductive thermoplastic resin sheet |
-
1990
- 1990-05-17 JP JP2128567A patent/JP2990365B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005288724A (en) * | 2004-03-31 | 2005-10-20 | Sankyo Kasei Kk | Conductive thermoplastic resin sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2990365B2 (en) | 1999-12-13 |
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