JP2001191433A - Tarpaulin excellent in conductivity - Google Patents
Tarpaulin excellent in conductivityInfo
- Publication number
- JP2001191433A JP2001191433A JP2000005394A JP2000005394A JP2001191433A JP 2001191433 A JP2001191433 A JP 2001191433A JP 2000005394 A JP2000005394 A JP 2000005394A JP 2000005394 A JP2000005394 A JP 2000005394A JP 2001191433 A JP2001191433 A JP 2001191433A
- Authority
- JP
- Japan
- Prior art keywords
- resin layer
- tarpaulin
- carbon black
- conductive carbon
- polyolefin
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、導電性に優れたタ
ーポリン（シート）に関する。さらに詳しくは、例え
ば、土木用、水産用、建築用、鉱工業、物流用などの各
種用途に好適に用いられる導電性に優れたターポリンに
関する。TECHNICAL FIELD The present invention relates to a tarpaulin (sheet) having excellent conductivity. More specifically, for example, the present invention relates to a highly conductive tarpaulin that is suitably used for various purposes such as civil engineering, fisheries, construction, mining, and distribution.
【０００２】[0002]
【従来の技術】従来より、繊維織布の片面または両面に
樹脂層（または薄膜）を積層したターポリンは、産業用
の素材として土木用、水産用、建築用、鉱工業用、物流
用などの広範な用途に使用されている。ターポリンの用
途が拡大されると共に、ターポリンに対して要求される
機能も多様化、高度化し、要求されている大きな機能が
導電性機能である。2. Description of the Related Art Conventionally, a tarpaulin obtained by laminating a resin layer (or a thin film) on one or both sides of a fiber woven fabric has been widely used as an industrial material for civil engineering, fisheries, construction, mining and industry, distribution, and the like. Used for various applications. As the use of tarpaulins is expanded, the functions required for tarpaulins are diversified and advanced, and the required large function is the conductive function.
【０００３】例えば、粉粒体の輸送・保管用に使用され
るフレキシブルコンテナは、粉粒体の性状により、粉粒
体をコンテナに充填（投入）、排出する際の粉粒体同士
の摩擦、および、充填した後に輸送・搬送する途中での
衝撃、摩擦、振動などによって静電気を発生して帯電し
易いので、各種用途で使用する際に重大な障害となって
いる。また、鉱山、工場などで使用されるターポリン製
フレキシブルダクト（風管）などの用途では、粉塵の付
着を防止するためにターポリンの導電化は不可欠であ
る。For example, in a flexible container used for transporting and storing powders, the friction between the powders at the time of filling (input) and discharging the powders in the container depends on the properties of the powders. In addition, since it is easy to be charged by generating static electricity due to impact, friction, vibration, and the like during transportation and transportation after filling, it is a serious obstacle when used in various applications. Also, in applications such as tarpaulin flexible ducts (wind pipes) used in mines, factories, etc., it is indispensable to make the tarpaulin conductive in order to prevent dust from adhering.
【０００４】樹脂積層ターポリンとして代表的なものと
しては、ポリ塩化ビニル系樹脂積層ターポリン、エチレ
ン−酢酸ビニル共重合体積層ターポリンなどが挙げられ
るが、導電化されたものは提案されていない。静電気に
基く帯電を防止したターポリンとして現在提案されてい
るものは、繊維織布の片面または両面にカーボンブラッ
クを混練した合成ゴムシートを積層した、合成ゴムシー
ト積層ターポリンのみである。しかしこの合成ゴムシー
ト積層ターポリンは、二次加工法によって目的物に加工
するには、他の樹脂を積層したターポリンとな異なり高
周波溶着加工法を適用できないので、接着はゴム糊を使
用して行っている。ゴム糊による接着は、非能率である
ばかりでなく、作業環境を汚染するなどの欠点がある。Typical examples of the resin laminated tarpaulin include a polyvinyl chloride-based resin laminated tarpaulin, an ethylene-vinyl acetate copolymer laminated tarpaulin, and the like, but a conductive one is not proposed. The only tarpaulin currently proposed as a tarpaulin that prevents static electricity-based charging is a synthetic rubber sheet laminated tarpaulin obtained by laminating a synthetic rubber sheet obtained by kneading carbon black on one or both surfaces of a fiber woven fabric. However, this synthetic rubber sheet laminated tarpaulin cannot be processed by high frequency welding, unlike the tarpaulin laminated with other resins, in order to be processed into the target object by the secondary processing method. ing. Adhesion with rubber glue is not only inefficient, but also has drawbacks such as contamination of the working environment.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記のよう
な諸欠点を解消したフレキシブルコンテナ用の導電性に
優れたターポリンを提供すべく鋭意検討の結果、完成さ
れたものである。本発明の目的は、次の通りである。 １．導電性に優れたターポリンを提供すること。 ２．高周波溶着加工法が適用できる導電性に優れたター
ポリンを提供すること。DISCLOSURE OF THE INVENTION The present invention has been completed as a result of intensive studies to provide a highly conductive tarpaulin for a flexible container which has solved the above-mentioned drawbacks. The objects of the present invention are as follows. 1. To provide a tarpaulin with excellent conductivity. 2. To provide a tarpaulin having excellent conductivity to which a high-frequency welding method can be applied.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、織編み物の基布の両面が樹脂層で被覆
されてなる導電性に優れたターポリンにおいて、一方の
樹脂層は少なくともエチレンと酢酸ビニルとの共重合体
層を含む樹脂層より、他方の樹脂層は導電性カーボンブ
ラックが配合されたポリオレフィン系樹脂層を含む樹脂
層よりそれぞれ構成されてなり、かつ、高周波溶着加工
法が適用できることを特徴とする、導電性に優れたター
ポリンを提供する。In order to solve the above problems, according to the present invention, in a highly conductive tarpaulin formed by covering both surfaces of a woven or knitted base fabric with resin layers, at least one of the resin layers has at least one resin layer. The resin layer containing a copolymer layer of ethylene and vinyl acetate, and the other resin layer is composed of a resin layer containing a polyolefin-based resin layer blended with conductive carbon black, and a high frequency welding method. The present invention provides a tarpaulin excellent in conductivity, characterized by being applicable.
【０００７】[0007]
【発明の実施の態様】以下、本発明を詳細に説明する。
本発明に係る導電性に優れたターポリンの基布として
は、木綿、麻などの天然繊維、ポリエステル繊維、ポリ
アミド繊維、ビニロン繊維などの合成繊維製の織布が挙
げられる。これら繊維は、単独でまたは２種以上を組合
わせてたフィラメントまたはスティーブルであってもよ
い。織布は、これら繊維を平織、綾織、朱子織などに織
った織物や編み物を意味し、編織物の種類・構造は、タ
ーポリンのフレキシビリティを阻害しないものであれ
ば、特に制限がない。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
Examples of the tarpaulin base fabric having excellent conductivity according to the present invention include woven fabrics made of natural fibers such as cotton and hemp, and synthetic fibers such as polyester fibers, polyamide fibers, and vinylon fibers. These fibers may be filaments or stebles, alone or in combination of two or more. The woven fabric means a woven or knitted fabric obtained by weaving these fibers into plain weave, twill weave, satin weave, or the like. The type and structure of the knitted fabric is not particularly limited as long as it does not inhibit the flexibility of tarpaulin.
【０００８】織布の繊維は、その太さが５００〜１００
０デニール、打ち込み本数１５〜３０本／インチの平織
物が好適である。基布がポリエステル繊維、ポリアミド
繊維の場合には、７５０デニールの繊維を、打込み本数
２０本×２０本／インチの平織物が好適である。これら
基布は、厚さが０．２〜２mmであり、幅が０．５〜３ｍ
程度のものが一般である。The fiber of the woven fabric has a thickness of 500 to 100.
A plain fabric having 0 denier and a driving count of 15 to 30 / inch is preferable. When the base fabric is a polyester fiber or a polyamide fiber, it is preferable to use a woven fabric of 750 denier and 20/20 fibers / inch. These base cloths have a thickness of 0.2 to 2 mm and a width of 0.5 to 3 m.
The degree is common.
【０００９】本発明に係る導電性に優れたターポリン
は、上記基布の一方の面の被覆樹脂層（または薄膜）
を、エチレンと酢酸ビニルとの共重合体層を含む樹脂層
によって構成する。エチレンと酢酸ビニルとの共重合体
層を含む樹脂層とは、エチレンと酢酸ビニルとの共重合
体層の単層よりなる樹脂層のほか、エチレンと酢酸ビニ
ルとの共重合体層と他の樹脂層とが積層された多層の樹
脂層であってもよい。他の樹脂層を形成する樹脂として
は、ポリ塩化ビニル、塩化ビニルを主成分とした塩化ビ
ニル系共重合体などのポリ塩化ビニル系樹脂、低密度ポ
リエチレン、高密度ポリエチレン、塩素化ポリエチレ
ン、エチレン・アクリル酸共重合体などのポリエチレン
系樹脂、ポリウレタン、ポリ酢酸ビニル、導電性カーボ
ンブラックを含むポリオレフィン系樹脂などが挙げられ
るが、これら例示したものに限定されるものではない。The electrically conductive tarpaulin according to the present invention comprises a coating resin layer (or thin film) on one surface of the base cloth.
Is composed of a resin layer including a copolymer layer of ethylene and vinyl acetate. A resin layer containing a copolymer layer of ethylene and vinyl acetate is a resin layer consisting of a single layer of a copolymer layer of ethylene and vinyl acetate, and a copolymer layer of ethylene and vinyl acetate and another resin layer. It may be a multilayer resin layer in which a resin layer is laminated. Other resins forming the resin layer include polyvinyl chloride, polyvinyl chloride resins such as a vinyl chloride copolymer containing vinyl chloride as a main component, low density polyethylene, high density polyethylene, chlorinated polyethylene, ethylene Examples include polyethylene resins such as acrylic acid copolymers, polyurethanes, polyvinyl acetates, and polyolefin resins containing conductive carbon black, but are not limited to these examples.
【００１０】エチレン−酢酸ビニル共重合体は、エチレ
ンと酢酸ビニルの成分重合比が９０：１０〜７０：３０
のものが好適である。酢酸ビニルの割合が１０重量％未
満であると高周波溶着加工が困難となり、また３０重量
％を超えると耐熱性が悪くなり、いづれも好ましくな
い。エチレンと酢酸ビニルの成分重合比の特に好ましい
範囲は、８５：１５〜７５：２５である。エチレン−酢
酸ビニル共重合体は、ＪＩＳ Ｋ７２１０に準拠し、温
度１９０℃、荷重２．１６kgfの条件で測定したメルト
フローレート（ＭＦＲ）が０．１〜５．０の範囲のもの
が好ましく、中でも０．５〜２．０の範囲のものが特に
好ましい。The ethylene-vinyl acetate copolymer has a component polymerization ratio of ethylene to vinyl acetate of 90:10 to 70:30.
Are preferred. If the proportion of vinyl acetate is less than 10% by weight, high-frequency welding becomes difficult, and if it exceeds 30% by weight, heat resistance deteriorates, and both are not preferred. A particularly preferred range of the polymerization ratio of ethylene and vinyl acetate is 85:15 to 75:25. The ethylene-vinyl acetate copolymer preferably has a melt flow rate (MFR) in the range of 0.1 to 5.0 measured at a temperature of 190 ° C. and a load of 2.16 kgf in accordance with JIS K7210. Those having a range of 0.5 to 2.0 are particularly preferred.
【００１１】本発明に係る導電性に優れたターポリン
は、上記基布の他方の面の被覆層（または薄膜）を、導
電性カーボンブラックを含むポリオレフィン系樹脂層を
含む樹脂層よりによって構成する。導電性カーボンブラ
ックを含むポリオレフィン系樹脂層を含む樹脂層とは、
導電性カーボンブラックを含むポリオレフィン系樹脂層
の単層よりなる樹脂層のほか、この層に他の樹脂層が積
層された多層の樹脂層であってもよい。他の樹脂層樹脂
層を形成する樹脂としては、ポリオレフィン系樹脂とし
ては、低密度ポリエチレン、高密度ポリエチレン、塩素
化ポリエチレン、エチレン−酢酸ビニル共重合体などの
ポリエチレン系樹脂、ポリプロピレン、プロピレン−エ
チレン共重合体などのポリプロピレン系樹脂などが挙げ
られる。In the tarpaulin having excellent conductivity according to the present invention, the coating layer (or thin film) on the other surface of the base cloth is constituted by a resin layer containing a polyolefin resin layer containing conductive carbon black. The resin layer containing a polyolefin resin layer containing conductive carbon black,
In addition to a single resin layer of a polyolefin-based resin layer containing conductive carbon black, a multilayer resin layer in which another resin layer is laminated on this layer may be used. Other resin layers As the resin forming the resin layer, polyolefin resins include polyethylene resins such as low-density polyethylene, high-density polyethylene, chlorinated polyethylene, and ethylene-vinyl acetate copolymer, and polypropylene and propylene-ethylene copolymers. Examples thereof include a polypropylene resin such as a polymer.
【００１２】上記ポリオレフィン系樹脂層には、導電性
カーボンブラックを配合する。導電性カーボンブラック
には特に制限はないが、平均表面積が比較的小さい場合
にはカーボンブラックの使用量が多量となり、そのため
ポリオレフィン系樹脂をフィルム化する際の流動性が悪
化する、フィルムの強度が極端に低下するなどの欠点が
顕著になる。物性上の観点から平均表面積３０ｍ2／ｇ
以上のものが好ましく、中でも平均表面積１００ｍ2／
ｇ以上のものが特に好適である。The polyolefin resin layer contains a conductive carbon black. There is no particular limitation on the conductive carbon black, but when the average surface area is relatively small, the amount of the carbon black used is large, so that the fluidity of the polyolefin resin when it is formed into a film is deteriorated. Disadvantages, such as an extreme drop, become noticeable. From the viewpoint of physical properties, the average surface area is 30 m 2 / g
The above are preferable, and among them, the average surface area is 100 m 2 /
g or more are particularly preferred.
【００１３】ポリオレフィン系樹脂に対する導電性カー
ボンブラックの配合量は、樹脂１００重量部に対し、
０．１〜２５重量部の範囲で選ぶものとする。配合量が
０．１重量部未満の場合は、被覆樹脂層の表面固有抵抗
が大きく導電性が改良されず、配合量が２５重量部を越
えると表面固有抵抗が小さく導電性が改良されるが、製
品のターポリンの柔軟性が損なわれ、高周波溶着加工す
る際にスパークするので、いずれも好ましくない。樹脂
１００重量部に対するカーボンブラックの特に好ましい
配合量は、３〜１５重量部である。The amount of the conductive carbon black blended with the polyolefin resin is based on 100 parts by weight of the resin.
It should be selected in the range of 0.1 to 25 parts by weight. When the amount is less than 0.1 part by weight, the surface resistivity of the coating resin layer is large and the conductivity is not improved. When the amount exceeds 25 parts by weight, the surface resistivity is small and the conductivity is improved. In addition, the flexibility of the tarpaulin of the product is impaired, and sparks are generated during high-frequency welding. A particularly preferred blending amount of carbon black with respect to 100 parts by weight of the resin is 3 to 15 parts by weight.
【００１４】発明者らによる実験によると、導電性カー
ボンブラックの配合量が上記０．１〜２５重量部の範囲
にあっても、表面固有抵抗が特定の範囲内にないと、本
発明の目的が効果的に達成されないことが分かった。本
発明の目的を効果的に達成するには表面固有抵抗を１０
3〜１０10Ωの範囲とするのが好ましいことが分かっ
た。表面固有抵抗がこの範囲内にあると、導電性に優れ
たターポリンは通常のターポリンと同様に、高周波溶着
法による溶着加工法によって容易に目的物に二次加工す
ることができる。表面固有抵抗が１０3Ωより小さい
と、高周波溶着加工する際にスパークし、１０10Ωを越
えると帯電防止性が不十分であり、いずれも好ましくな
い。According to an experiment conducted by the inventors, even if the compounding amount of the conductive carbon black is within the above range of 0.1 to 25 parts by weight, the object of the present invention is that if the specific surface resistance is not within a specific range. Was not effectively achieved. In order to effectively achieve the object of the present invention, a surface resistivity of 10
3 was found to be preferably in the range of to 10 10 Omega. When the surface resistivity is within this range, the tarpaulin having excellent conductivity can be easily secondary-processed to a target object by a welding process using a high-frequency welding method, similarly to a normal tarpaulin. If the surface specific resistance is less than 10 3 Ω, sparking occurs during high-frequency welding, and if it exceeds 10 10 Ω, the antistatic properties are insufficient, and both are not preferred.
【００１５】本発明に係る導電性に優れたターポリン
は、織編み物の一方の面をエチレンと酢酸ビニルとの共
重合体層を含む樹脂層｛以下「樹脂層(a) 」ということ
がある｝によって被覆し、他方の面を上記導電性カーボ
ンブラックを特定量配合したポリオレフィン系樹脂層を
含む｛以下「樹脂層(b)」ということがある｝によって
被覆する。被覆方法としては、(1) 平織物の一方の面を
ロール間で溶融させた樹脂層(a) をカレンダー成形法で
加圧被覆し、他方の面に樹脂層(b)を熱溶着する方法、
(2) 平織物の一方の面をロール間で溶融させた樹脂層
(a) をカレンダー成形法で加圧被覆し、他方の面に樹脂
層(b) を接着剤を介して被覆する方法、(3)平織物の双
方の面に、樹脂層(a) と樹脂層(b) とを、接着剤を介し
て被覆する方法などが挙げられる。樹脂層(a) に導電性
カーボンブラックを特定量配合したポリオレフィン系樹
脂層を積層した多層樹脂層とする場合には、導電性カー
ボンブラックを特定量配合したポリオレフィン系樹脂層
を表面層とする。樹脂層(b)を他の樹脂層が積層された
多層の樹脂層とした場合にも、導電性カーボンブラック
を特定量配合したポリオレフィン系樹脂層を表面層とす
る。The electrically conductive tarpaulin according to the present invention has a resin layer on one surface of a woven or knitted fabric containing a copolymer layer of ethylene and vinyl acetate. Hereinafter, the resin layer may be referred to as a “resin layer (a)”. And the other surface is covered with a polyolefin-based resin layer in which a specific amount of the conductive carbon black is blended {hereinafter sometimes referred to as “resin layer (b)” ”. The coating method is as follows: (1) A method in which a resin layer (a) in which one side of a plain fabric is melted between rolls is pressure-coated by a calendering method, and a resin layer (b) is thermally welded to the other side. ,
(2) A resin layer in which one side of a plain fabric is melted between rolls
(a) is press-coated by a calendering method, and the other surface is coated with a resin layer (b) via an adhesive. (3) Both surfaces of the plain fabric are coated with the resin layer (a) and the resin. A method of coating the layer (b) with an adhesive. When the resin layer (a) is a multilayer resin layer in which a polyolefin resin layer containing a specific amount of conductive carbon black is laminated, a polyolefin resin layer containing a specific amount of conductive carbon black is used as the surface layer. Even when the resin layer (b) is a multilayer resin layer in which another resin layer is laminated, a polyolefin-based resin layer containing a specific amount of conductive carbon black is used as the surface layer.
【００１６】本発明に係る導電性の優れたターポリンの
被覆樹脂の層は、エチレンと酢酸ビニルとの共重合体層
を含む樹脂層｛樹脂層(a)}の厚さは、１．０mm以下が好
ましい。厚さが１．０mm以上であると、折り畳み作業性
に劣るので好ましくない。導電性カーボンブラックを配
合したポリオレフィン系樹脂層の厚さは、単層の場合は
ターポリンの表面に導電性を付与することができる２０
０〜１０００μｍの範囲で選ぶのが好ましい。樹脂層
(b)を他の樹脂層が積層された多層の樹脂層とする場合
にも、導電性カーボンブラックを配合したポリオレフィ
ン系樹脂層の厚さを２００〜１０００μｍの範囲で選
び、他の樹脂層との和を１．０mm以下とするのが好まし
い。The thickness of the resin layer containing the copolymer of ethylene and vinyl acetate {resin layer (a)} is preferably 1.0 mm or less. Is preferred. When the thickness is 1.0 mm or more, folding workability is poor, which is not preferable. The thickness of the polyolefin-based resin layer containing the conductive carbon black is such that a single layer can impart conductivity to the surface of the tarpaulin.
It is preferable to select in the range of 0 to 1000 μm. Resin layer
Even when (b) is a multilayer resin layer in which another resin layer is laminated, the thickness of the polyolefin-based resin layer containing conductive carbon black is selected in the range of 200 to 1000 μm, and the other resin layer and Is preferably 1.0 mm or less.
【００１７】本発明に係る導電性に優れたターポリン
を、飛散し易い粉粒体の輸送・保管用に使用されるフレ
キシブルコンテナ用の素材として使用した場合には、粉
粒体をコンテナに充填（投入）、排出する際の粉粒体同
士の摩擦、および、充填した後に輸送・搬送する途中で
の衝撃、摩擦、振動などによって静電気を発生しても帯
電することがない。また、鉱山、工場などで使用される
フレキシブルダクト（風管）などの用途に使用した場合
にも、粉塵の付着が防止できる。When the electrically conductive tarpaulin according to the present invention is used as a material for a flexible container used for transport and storage of easily scattered powder, the powder is filled in the container ( It does not become charged even if static electricity is generated due to friction between powders and granules at the time of charging and discharging, and impact, friction, vibration and the like during transportation / transportation after filling. In addition, even when used in applications such as flexible ducts (wind pipes) used in mines and factories, the adhesion of dust can be prevented.
【００１８】[0018]
【実施例】次に、本発明を実施例に基づいてさらに詳細
に説明するが、本発明はその趣旨を越えない限り、以下
の記載例に限定されるものではない。Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following description unless it exceeds the gist.
【００１９】以下の実施例、比較例で使用した基布被覆
用の樹脂組成物の調製に使用したものは、次の通りであ
る。 ＥＶＡ：エチレン−酢酸ビニル共重合体であって、酢酸
ビニル含量が１９重量％、ＪＩＳ Ｋ７２１０に準拠
し、温度１９０℃、荷重２．１６kgf の条件で測定した
ＭＦＲが２．５のもの。 ケッチェンブラック：ＤＢＰ吸着油量が３６０ml／１０
ｇ、表面積８００ｍ2／ｇ、粒子径３０ｍμの物性値を
有するもの。 アセチレンブラック：ＤＢＰ吸着油量が２１０ml／１０
ｇ、表面積１０１ｍ2／ｇ、粒子径４０ｍμの物性値を
有するもの。The following were used in the preparation of the resin composition for coating the base fabric used in the following Examples and Comparative Examples. EVA: an ethylene-vinyl acetate copolymer having a vinyl acetate content of 19% by weight and an MFR of 2.5 measured at 190 ° C. under a load of 2.16 kgf according to JIS K7210. Ketjen Black: The amount of DBP adsorbed oil is 360ml / 10
g, having a surface area of 800 m 2 / g and a particle diameter of 30 mμ. Acetylene black: DBP adsorbed oil amount is 210ml / 10
g, having a surface area of 101 m 2 / g and a particle diameter of 40 mμ.
【００２０】実施例、比較例において、各種特性は以下
に記載の方法で評価した。 (1) 導電性の評価試験 (1-1) 表面固有抵抗：製品ターポリンの導電性カーボン
ブラックを配合したポリオレフィン樹脂フィルム面につ
き、ＪＩＳ Ｋ７１９４に準拠して測定した。 (1-2) タバコ灰付着試験：乾燥したタバコ灰を任意に置
いた灰皿に、製品ターポリンの導電性カーボンブラック
を配合したポリオレフィン樹脂フィルム面を１cmに接近
させ、タバコ灰を引きつけるか否かを目視観察する方
法。タバコ灰を引きつけないものを「なし」、引きつけ
るものを「あり」とした。In Examples and Comparative Examples, various characteristics were evaluated by the methods described below. (1) Conductivity evaluation test (1-1) Surface resistivity: Measured in accordance with JIS K7194 on the surface of a polyolefin resin film containing conductive carbon black as a product tarpaulin. (1-2) Tobacco ash adhesion test: The surface of the polyolefin resin film containing the conductive carbon black of the product tarpaulin is brought close to 1 cm on an ashtray where dried tobacco ash is arbitrarily placed, and it is determined whether or not tobacco ash is attracted. A method of visual observation. Those that did not attract tobacco ash were rated "none" and those that did.
【００２１】(2) 高周波溶着加工性 高周波ウエルダーを使用し、周波数１９ＭＨｚ、５秒、
溶着幅１０mm×３０mmの溶着部を形成し、この溶着部に
つき剥離強度を測定して評価した。評価結果の表示は、
溶着部剥離強度が２５kg以上のもの＝「○」、２０kg以
下のもの＝「×」とした。(2) High frequency welding processability Using a high frequency welder, a frequency of 19 MHz, 5 seconds,
A weld having a weld width of 10 mm × 30 mm was formed, and the peel strength of this weld was measured and evaluated. The display of the evaluation result
When the peel strength of the welded portion was 25 kg or more: "○", and when it was 20 kg or less: "x".
【００２２】［実施例１〜実施例２、比較例１〜比較例
２］実施例、比較例で使用した基布、被覆樹脂層を構成
する各成分は、次の通りである。７５０デニールのポリ
エステル繊維を、２０×２０本／インチ打込みの平織物
を基布とし、基布の一方の面にカレンダー成形法で厚さ
０．３mmのＥＶＡの層を形成し、基布の他方の面に０．
３mmのＥＶＡの層を形成し、さらにその上にＥＶＡ１０
０重量部にケッチェンブラック、アセチレンブラックを
表−１に記載した重量部宛配合した（比較例１では配合
せず）層を厚さ０．１mmに形成し、全体の厚さが０．８
５mmのターポリンを得た。得られたターポリンにつき上
記した測定法で評価し、結果を表−１に記載した。[Examples 1 and 2 and Comparative Examples 1 and 2] The components constituting the base cloth and the coating resin layer used in the examples and comparative examples are as follows. 750-denier polyester fiber is used as a base fabric of a plain fabric of 20 × 20 fibers / inch, and a 0.3 mm-thick EVA layer is formed on one side of the base fabric by a calendering method, and the other side of the base fabric is formed. 0 on the surface of
A 3 mm layer of EVA is formed, and an EVA 10
0 parts by weight of Ketjen Black and acetylene black were added to the parts by weight described in Table 1 (not added in Comparative Example 1) to form a layer having a thickness of 0.1 mm, and the total thickness was 0.8 mm.
A 5 mm tarpaulin was obtained. The obtained tarpaulin was evaluated by the measurement method described above, and the results are shown in Table 1.
【００２３】[0023]
【表１】 [Table 1]
【００２４】表−１より、次のことが明かである。 (1) 実施例１〜実施例２のターポリンは、表面固有抵抗
が１０3〜１０10Ωの範囲にあり、タバコ灰付着試験で
タバコ灰が付着し難く導電性に優れ、高周波溶着加工性
にもすぐれている。 (2) これに対して、導電性カーボンブラックが配合され
ていない比較例１のターポリンは、表面固有抵抗が１０
15Ω以上であり、タバコ灰付着試験でタバコ灰が付着し
易い（比較例１）。 (3) また導電性カーボンブラックの配合量が多く、表面
固有抵抗が１０1Ωと低い場合は、タバコ灰付着試験で
タバコ灰が付着し難くいが、高周波溶着加工性に劣る
（比較例２）。From Table 1, the following is clear. (1) The tarpaulins of Examples 1 and 2 have a surface resistivity in the range of 10 3 Ω to 10 10 Ω, are hardly adhered by tobacco ash in a tobacco ash adhesion test, have excellent conductivity, and have high frequency welding workability. Is also excellent. (2) In contrast, the tarpaulin of Comparative Example 1 containing no conductive carbon black had a surface resistivity of 10%.
It is 15 Ω or more, and tobacco ash easily adheres in a tobacco ash adhesion test (Comparative Example 1). (3) When the amount of the conductive carbon black is large and the surface resistivity is as low as 10 1 Ω, the tobacco ash hardly adheres in the tobacco ash adhesion test, but the high frequency welding processability is inferior (Comparative Example 2). ).
【００２５】[0025]
【発明の効果】本発明は、以上説明した通り、次の様な
特別に有利な効果を奏し、その産業上の利用価値は極め
て大である。 １．本発明に係る導電性に優れたターポリンは、飛散し
易い粉粒体の輸送・保管用に使用されるフレキシブルコ
ンテナ用の素材として使用した場合には、粉粒体をコン
テナに充填（投入）、排出する際の粉粒体同士が摩擦し
て静電気が発生しても帯電し難く、かつ、充填した後に
輸送・搬送する途中での衝撃、摩擦、振動などによって
静電気を発生しても帯電し難い。 ２．本発明に係る導電性に優れたターポリンは、また、
鉱山、工場などで使用されるフレキシブルダクト（風
管）などの用途に使用した場合にも、粉塵の付着が防止
できる。 ３．従来のカーボンブラックを混練した合成ゴムシート
を積層したターポリンは、高周波ウエルダーによる溶着
加工が不可能であったが、本発明に係る導電性に優れた
ターポリンは、表面固有抵抗を１０3〜１０10Ωの範囲
にすると、高周波ウエルダーによる溶着加工を行っても
スパークすることがなく、溶着加工が可能である。As described above, the present invention has the following particularly advantageous effects, and its industrial utility value is extremely large. 1. When the tarpaulin having excellent conductivity according to the present invention is used as a material for a flexible container used for transporting / storage of easily scattered powder, the powder is filled (contained) in the container, It is difficult to be charged even if static electricity is generated due to friction between the powder and particles when discharged, and it is difficult to be charged even if static electricity is generated due to shock, friction, vibration, etc. during transportation after transportation after filling. . 2. Tarpaulin excellent in conductivity according to the present invention,
Even when used for applications such as flexible ducts (wind pipes) used in mines and factories, the adhesion of dust can be prevented. 3. A conventional tarpaulin obtained by laminating a synthetic rubber sheet kneaded with carbon black cannot be welded by a high-frequency welder, but the tarpaulin having excellent conductivity according to the present invention has a surface resistivity of 10 3 to 10 10. Within the range of Ω, there is no spark even when welding is performed using a high-frequency welder, and welding can be performed.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 尾野 昭 茨城県稲敷郡阿見町中央八丁目３番２号 三菱化学産資株式会社商品研究所内 (72)発明者 出口 自治夫 茨城県稲敷郡阿見町中央八丁目３番２号 三菱化学産資株式会社商品研究所内 (72)発明者 水谷 敏和 三重県四日市市東邦町１番地 三菱化学株 式会社四日市事業所内 Ｆターム(参考） 4F100 AA37C AA37H AK01B AK01C AK03C AK41 AK68 AK68B BA03 BA04 BA06 BA10B BA10C CA21 CA21C DG01 DG12A DG13A GB04 GB07 GB15 GB90 JG01 JG01C JG03 JG04C JG10 JL06 JL12 YY00C 4L031 AB32 AB33 BA02 DA14 DA15 4L033 AB05 AB06 AC06 AC15 CA12 CA28 DA00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Ono 8-2-2 Chuo, Ami-cho, Inashiki-gun, Ibaraki Pref. Mitsubishi Chemical Industrial Products Co., Ltd. Chuo 8-3-2 Mitsubishi Chemical Industrial Products Research Institute (72) Inventor Toshikazu Mizutani 1 Tohocho, Yokkaichi City, Mie Prefecture Mitsubishi Chemical Corporation Yokkaichi Office F-term (reference) AK41 AK68 AK68B BA03 BA04 BA06 BA10B BA10C CA21 CA21C DG01 DG12A DG13A GB04 GB07 GB15 GB90 JG01 JG01C JG03 JG04C JG10 JL06 JL12 YY00C 4L031 AB32 AB33 BA02 DA14 DA15 4L033 AB05 AB06 AC06
Claims (2)
れてなる導電性に優れたターポリンにおいて、一方の樹
脂層は少なくともエチレンと酢酸ビニルとの共重合体層
を含む樹脂層より、他方の樹脂層は導電性カーボンブラ
ックが配合されたポリオレフィン系樹脂層を含む樹脂層
よりそれぞれ構成されてなり、かつ、高周波溶着加工法
が適用できることを特徴とする、導電性に優れたターポ
リン。1. A highly conductive tarpaulin in which both surfaces of a base fabric of a woven or knitted fabric are covered with a resin layer, wherein one of the resin layers is formed of a resin layer containing at least a copolymer layer of ethylene and vinyl acetate. A tarpaulin with excellent conductivity, characterized in that the other resin layer is composed of a resin layer including a polyolefin-based resin layer in which conductive carbon black is blended, and to which a high frequency welding method can be applied.
フィン系樹脂層の表面固有抵抗が、１０3〜１０10Ωで
ある、請求項１に記載の導電性に優れたターポリン。2. The highly conductive tarpaulin according to claim 1, wherein the polyolefin resin layer containing conductive carbon black has a surface resistivity of 10 3 Ω to 10 10 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000005394A JP3795285B2 (en) | 2000-01-14 | 2000-01-14 | Tarpaulin with excellent conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000005394A JP3795285B2 (en) | 2000-01-14 | 2000-01-14 | Tarpaulin with excellent conductivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001191433A true JP2001191433A (en) | 2001-07-17 |
| JP3795285B2 JP3795285B2 (en) | 2006-07-12 |
Family
ID=18534068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000005394A Expired - Lifetime JP3795285B2 (en) | 2000-01-14 | 2000-01-14 | Tarpaulin with excellent conductivity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3795285B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005018928A1 (en) * | 2003-08-26 | 2005-03-03 | Hyuk-Chong Kwon | Tarpaulin by using polyolefin group split yarn and method thereof |
| KR101102958B1 (en) | 2009-07-28 | 2012-01-09 | 경세웅 | Antibacterial Tarpaulin And Process Of Producing Thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013158959A (en) * | 2012-02-02 | 2013-08-19 | Mitsubishi Plastics Inc | Conductive laminated sheet and flexible container |
-
2000
- 2000-01-14 JP JP2000005394A patent/JP3795285B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005018928A1 (en) * | 2003-08-26 | 2005-03-03 | Hyuk-Chong Kwon | Tarpaulin by using polyolefin group split yarn and method thereof |
| KR101102958B1 (en) | 2009-07-28 | 2012-01-09 | 경세웅 | Antibacterial Tarpaulin And Process Of Producing Thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3795285B2 (en) | 2006-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3008000B2 (en) | Woven fabric with antistatic treatment | |
| JP2977900B2 (en) | Flexible bulk containers | |
| US6045919A (en) | Antistatic film for packaging materials diffusing volatile products | |
| AU686684B2 (en) | Anti-incendiary flexible intermediate bulk container system | |
| JP2015180714A (en) | Conductive polyethylene resin composition, molded product using the same, and laminate | |
| EP1341697A2 (en) | Anti-static woven fabric and flexible bulk container | |
| AU2002239488A1 (en) | Anti-static woven fabric and flexible bulk container | |
| US20020136859A1 (en) | Antistatic Yarn, Fabric, Carpet and Fiber Blend Formed From Conductive or Quasi-Conductive Staple Fiber | |
| JP2018090326A (en) | Transparent electrically-conductive cover tape | |
| JP2017019145A (en) | Tarpaulin and flexible container bag formed using tarpaulin | |
| JP2001191433A (en) | Tarpaulin excellent in conductivity | |
| US20060269711A1 (en) | Flexible intermediate bulk container having optimum discharge of hazardous charge | |
| JP5062928B2 (en) | Conductive flexible container | |
| JPS61108710A (en) | Antistatic flat yarn | |
| JP2023072724A (en) | Conductive tarpaulin and method for manufacturing the same | |
| JP2002337980A (en) | Conductive flexible container | |
| JP2000062106A (en) | Tarpaulin with outstanding antistatic property | |
| JP3113589B2 (en) | Laminated sheet | |
| JPH06247492A (en) | Base cloth for electricity controllable flexible container | |
| JP2001293831A (en) | Laminate sheet | |
| JPH02118173A (en) | Zinc-coated knitted fabric | |
| JPH0246387B2 (en) | ||
| JP7028016B2 (en) | Transparent conductive cover tape | |
| JP2013158959A (en) | Conductive laminated sheet and flexible container | |
| JP2020100415A (en) | Flexible container and manufacturing method for the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040212 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050530 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050607 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20050805 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20051108 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20051222 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060124 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060316 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060411 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060412 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 3795285 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090421 Year of fee payment: 3 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313115 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090421 Year of fee payment: 3 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090421 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090421 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100421 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110421 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120421 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130421 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130421 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140421 Year of fee payment: 8 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313115 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |