JPS62234925A - Metal laminate material with adhesive containing conductive particles - Google Patents
Metal laminate material with adhesive containing conductive particlesInfo
- Publication number
- JPS62234925A JPS62234925A JP61079370A JP7937086A JPS62234925A JP S62234925 A JPS62234925 A JP S62234925A JP 61079370 A JP61079370 A JP 61079370A JP 7937086 A JP7937086 A JP 7937086A JP S62234925 A JPS62234925 A JP S62234925A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- conductive particles
- adhesive
- metal laminate
- laminate material
- 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
- 229910052751 metal Inorganic materials 0.000 title claims description 48
- 239000002184 metal Substances 0.000 title claims description 48
- 239000000853 adhesive Substances 0.000 title claims description 33
- 230000001070 adhesive effect Effects 0.000 title claims description 33
- 239000002245 particle Substances 0.000 title claims description 29
- 239000002648 laminated material Substances 0.000 title claims description 13
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は鉄鋼等の防食用に被防食体（被貼着金属）に貼
って用いる電気化学的に被貼着金属より卑な金属からな
る金属テープ類あるいは電磁波シールド用・静電気防電
用・電気的導体接続用に用いる金属箔テープ類に関する
。すなわち、板状の金属に粘着剤をつけて、被貼着金属
に貼りつける場合１両金属間に電気的導通をはかる事が
必要な分野に用いる導電粒子を含んだ粘着剤つき金属積
層材に係る。[Detailed Description of the Invention] [Industrial Application Field] The present invention is made of a metal that is electrochemically less base than the metal to be adhered, and is applied to an object to be protected (metal to be adhered) for corrosion protection of steel, etc. It relates to metal tapes or metal foil tapes used for electromagnetic shielding, static electricity protection, and electrical conductor connections. In other words, when applying an adhesive to a metal plate and attaching it to the metal to which it is attached, the adhesive-coated metal laminate containing conductive particles is used in fields where it is necessary to establish electrical continuity between the two metals. Related.
通常、鉄鋼等の防食を図るためには亜鉛、アルミなどの
電気化学的に鉄鋼等より卑な金属を被防食体に電気的に
つなぐと亜鉛、アルミなどは犠牲陽極作用を発揮して単
なる被覆防食効果を土建る防食効果をあげるものであり
、そのためには被防食体と金属積層材とが導通すること
が必要である。また電線ケーブルやその端子接続部等の
電磁波シールド用、静電気防電用、電気的導体接続用と
して用いる場合は貼着する金属箔はアースをとるため他
の金属と導通させる必要がある。Normally, in order to prevent corrosion of steel, etc., when a metal such as zinc or aluminum, which is electrochemically more base than steel, is electrically connected to the object to be corroded, the zinc or aluminum acts as a sacrificial anode and is simply a coating. The anti-corrosion effect is enhanced, and for this purpose, it is necessary that the object to be protected and the metal laminate be electrically connected. Furthermore, when used for electromagnetic shielding, static electricity protection, or electrical conductor connection of electric wire cables and their terminal connections, etc., the metal foil to be pasted needs to be electrically connected to other metals in order to provide grounding.
従来これらの用途に用いる金属もしくは金属箔（以下こ
れを板状の金属という）には粘着層を導電性とするため
に導電性粘着剤を使用していた。導電性粘着剤は非導電
性粘着剤にカーボンや銅粉などの導電粒子又はファイバ
ーを数十％混入して構成されるものであった。Conventionally, conductive adhesives have been used for metals or metal foils (hereinafter referred to as plate-shaped metals) used for these purposes in order to make the adhesive layer conductive. The conductive adhesive is composed of a non-conductive adhesive mixed with several tens of percent of conductive particles or fibers such as carbon or copper powder.
従来の導電性粘着剤は導電粒子の混入量が多いため、粘
着力が不十分であり高価なものとなるという問題点を有
するものであり、また金属粉などを粘着剤にまぜると粘
着剤の酸化度を極力おとさないと反応が起ってしまうお
それがあり、混入量が多くなる程、反応の防止が困難と
なるという問題点を有するものであった。Conventional conductive adhesives have the problem of insufficient adhesion and high cost due to the large amount of conductive particles mixed in.Additionally, mixing metal powder etc. into the adhesive can cause the adhesive to deteriorate. If the degree of oxidation is not reduced as much as possible, there is a risk that a reaction will occur, and as the amount of the mixture increases, it becomes more difficult to prevent the reaction.
本発明では導電性粘着剤の上記の問題点は導電性粒子ま
たは繊維の添加量が多いことに起因することを考慮し、
導電性粒子の含有量を極度に下げて通電を確保しようと
したものである。In the present invention, taking into consideration that the above-mentioned problems with conductive adhesives are caused by the large amount of conductive particles or fibers added,
This is an attempt to ensure current conduction by extremely lowering the content of conductive particles.
すなわち、本発明の導電粒子を含んだ粘着剤つき金属積
層材は、導電粒子が非導電性粘着剤に対し０．０５〜〜
１．０重量％含有され、がっ導電粒子の７０％以上の大
きさが粘着剤層の厚みの８０〜１４０％であり、該金属
積層材を被貼着金属に貼りつけた場合にこの積層材と被
貼着金属との間に電気的導通が確保されることを特徴と
するものである。That is, in the adhesive-attached metal laminate material containing conductive particles of the present invention, the conductive particles are 0.05 to 0.05 to the non-conductive adhesive.
1.0% by weight, the size of 70% or more of the conductive particles is 80 to 140% of the thickness of the adhesive layer, and when the metal laminate is attached to the metal to be adhered, this laminate It is characterized in that electrical continuity is ensured between the material and the metal to be adhered.
ここで板条の金属とは亜鉛、アルミ、鉄、銅およびそれ
らの合金の箔に代表される薄板、条、テープ、打抜片で
あり、金属の種類や厚みなどは用途に応じ選定されるも
のであり限定はない。Here, metal plates and strips are thin plates, strips, tapes, and punched pieces represented by foils of zinc, aluminum, iron, copper, and their alloys, and the type and thickness of the metal are selected depending on the application. There are no limitations.
非導電性粘着剤はゴム系、アクリル系等種々あるが導電
粒子として金属粒子を用いる場合は酸化度の低いもの、
あるいは中性のものでないと反応が避けられないので不
適当である。導電性粒子は亜鉛粉、銅粉等の金属粒子あ
るいは炭素粉があげられるが形状は薄片状あるいは繊維
状のものは適さず塊状、球状のものが適する。材質は任
意のものでよいが防食用に用いる場合には局部腐食を避
けるために板条の金属と同種金属であることが望ましい
。なお粘着剤を塗布した本発明の積層材は粘着剤層を保
護するため使用前までは粘着剤層に接しさせてシリコー
ン処理等をした剥離紙を用いるべきことは当然である。There are various types of non-conductive adhesives such as rubber-based and acrylic-based adhesives, but when using metal particles as conductive particles, one with a low degree of oxidation,
Otherwise, it is unsuitable unless it is neutral because a reaction is unavoidable. Examples of the conductive particles include metal particles such as zinc powder and copper powder, or carbon powder, but those in the form of flakes or fibers are not suitable, but those in the form of lumps or spheres are suitable. The material may be any material, but when used for corrosion protection, it is desirable to use the same type of metal as the metal of the strip to avoid local corrosion. It goes without saying that for the laminated material of the present invention coated with an adhesive, a release paper treated with silicone or the like should be used in contact with the adhesive layer before use in order to protect the adhesive layer.
本発明の導電粒子を含んだ粘着剤つき金属積層材を用い
て被貼着金属に適用した例を第１図に示す。第１図に見
るように積層材の板状金属１と被貼着金属４との間に非
導電性粘着剤２中の導電粒子３がはまりこんで導通がは
がれる。FIG. 1 shows an example in which the adhesive-coated metal laminate containing conductive particles of the present invention is applied to a metal to be adhered. As shown in FIG. 1, the conductive particles 3 in the non-conductive adhesive 2 get stuck between the plate metal 1 of the laminated material and the metal to be adhered 4, and the conduction is broken.
導電粒子の含有率を非導電性粘着剤２に対し０．０５〜
１．０重量％と限定したのは、０．０５重量％未満では
導電粒子が少なすぎ導電性が不安定になるためであり、
１．０重量％を越えると粘着力がおちたり、粘着剤の
酸化度によっては導電粒子３との反応が顕著となり性能
が劣化するためである。また導電粒子３の大きさはその
７０％以上の大きさが粘着剤層の厚みの８０〜１４０％
の大きさとなる必要がある。この限定は第１図の機構を
活すために必要なものであり、粒子の直径が８０％を切
ると数個の粒子が集合しないと導通に寄与できず、１４
０％を超えると積層材をなす板状の金属１を押しあげ、
又は粘着剤が有効に粘着する面積が減少する。以上のよ
うに限定した粒子の大きさのものが１００％であること
が望ましいわけではあるが、実際的には７０％以上であ
ればほぼ満足できる特性を得ることができる。The content rate of conductive particles is 0.05 to 2 with respect to non-conductive adhesive 2.
The reason why it is limited to 1.0% by weight is that if it is less than 0.05% by weight, there are too few conductive particles and the conductivity becomes unstable.
This is because if the amount exceeds 1.0% by weight, the adhesive strength will decrease, and depending on the degree of oxidation of the adhesive, the reaction with the conductive particles 3 will become significant, resulting in a deterioration of performance. In addition, the size of the conductive particles 3 is such that 70% or more of the size is 80 to 140% of the thickness of the adhesive layer.
It needs to be the size of This limitation is necessary to take advantage of the mechanism shown in Figure 1; if the particle diameter is less than 80%, it will not be possible to contribute to conduction unless several particles aggregate, and 14
When it exceeds 0%, the plate-shaped metal 1 forming the laminated material is pushed up,
Or the area to which the adhesive can effectively adhere is reduced. Although it is desirable that the particle size limited as described above be 100%, practically satisfactory characteristics can be obtained if the particle size is 70% or more.
かくして、本発明の導電粒子を含んだ粘着剤つき金属積
層材を被貼着金属に貼りつけると、非導電性粘着剤中に
少量含有せしめた導電粒子により板状金属と被貼着金属
との電気的導通が確保され、しかも十分な粘着力をもっ
て貼着されることになり、それぞれ防食用として、ある
いは電磁波シールド用、静電気防食用、電気的導体接続
用等として好適に作用することになる。Thus, when the adhesive-coated metal laminate containing the conductive particles of the present invention is attached to the metal to be adhered, the conductive particles contained in a small amount in the non-conductive adhesive cause the bond between the plate metal and the metal to be adhered. Electrical continuity is ensured and the adhesive is adhered with sufficient adhesive strength, so that it functions suitably as corrosion protection, electromagnetic shielding, electrostatic corrosion protection, electrical conductor connection, and the like.
以下に実施例を示す。Examples are shown below.
実施例
１００μ厚の亜鉛箔と３５μ厚の銅箔に粘着剤を塗布し
通常の方法で乾燥し、剥離紙をはさんで巻きとった。用
いた粘着剤はベースとなる非導電性樹脂は２種類とし、
樹脂１はコニシボンド（株）の合成ゴム系、中性のＫ１
−３０３であり、樹脂２は東亜合成（株）のアクリル系
、酸度１〜２の５ＣＬ−２００Ｇである。導電粒子は亜
鉛アトマイズ粉および銅アトマイズ粉を用いた。アトマ
イズ粉は振動フルイを用いて粒度別にわけた。２００メ
ツシユオーバーのもの（７０μを超すもの）をＡ粉、２
００メツシユアンダー３２５メツシユオーバーのもの（
４０〜７０μのもの）をＢ粉、３２５メツシユアンダー
（４０μ以下）をＣ粉とした。これら粘着剤層の厚みは
５０μｍとした。Example 100μ thick zinc foil and 35μ thick copper foil were coated with an adhesive, dried in a conventional manner, and rolled up with release paper in between. The adhesive used was based on two types of non-conductive resin.
Resin 1 is synthetic rubber-based, neutral K1 from Konishi Bond Co., Ltd.
-303, and the resin 2 is an acrylic 5CL-200G manufactured by Toagosei Co., Ltd. with an acidity of 1 to 2. Zinc atomized powder and copper atomized powder were used as the conductive particles. The atomized powder was separated by particle size using a vibrating sieve. 200 mesh over (over 70μ) powder A, 2
00 mesh under 325 mesh over (
40 to 70μ) was designated as B powder, and 325 mesh under (40μ or less) was designated as C powder. The thickness of these adhesive layers was 50 μm.
上記を組み合せて第１表に示す組合せの積層材を作製し
た。得られた積層材をステンレス標準板に貼りつけＪＩ
Ｓ法で９０°引きはがしを行ない粘着力を測定した。ま
た市販のテスターを用いて積層材の金属と相手金属との
間の抵抗を測定した。By combining the above materials, laminated materials having the combinations shown in Table 1 were produced. The obtained laminated material is pasted on a stainless steel standard plate and JI
The adhesive force was measured by peeling at 90° using the S method. Furthermore, the resistance between the metal of the laminated material and the mating metal was measured using a commercially available tester.
なお１〜ＩＯに用いた粘着剤は金属粉を混合後も導電性
は検知されず、非導電性粘着剤であった。Note that the adhesive used in Examples 1 to IO had no electrical conductivity detected even after mixing metal powder, and was a non-conductive adhesive.
（以下余白）
第１表
〔発明の効果〕
以上のように本発明によれば、金属粉の添加量が極小で
も通電可能でしがも十分な粘着力が得られる金属積層材
を提供できるという効果を有する。(The following is a blank space.) Table 1 [Effects of the Invention] As described above, according to the present invention, it is possible to provide a metal laminate material that can conduct electricity even when the amount of metal powder added is extremely small and yet has sufficient adhesive strength. have an effect.
第１図は本発明の係る金属積層材を被貼着金属に貼りつ
けた場合の説明図である。FIG. 1 is an explanatory diagram of a metal laminate according to the present invention applied to a metal to be adhered.
Claims (1)
属積層材において、導電粒子が非導電性粘着剤に対し０
．０５〜１．０重量％含有され、かつ導電粒子の７０％
以上の大きさが粘着剤層の厚みの８０〜１４０％であり
、該金属積層材を被貼着金属に貼りつけた場合にこの積
層材と被貼着金属との間に電気的導通が確保されること
を特徴とする導電粒子を含んだ粘着剤つき金属積層材。1. In a metal laminate material in which an adhesive containing conductive particles is applied to a plate-shaped metal, the conductive particles are 0% compared to the non-conductive adhesive.
．． 05 to 1.0% by weight, and 70% of the conductive particles
The above size is 80 to 140% of the thickness of the adhesive layer, and when the metal laminate material is attached to the metal to be adhered, electrical continuity is ensured between the laminated material and the metal to be adhered. A metal laminate material with adhesive containing conductive particles characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61079370A JPH0611527B2 (en) | 1986-04-07 | 1986-04-07 | Metal laminate with adhesive containing conductive particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61079370A JPH0611527B2 (en) | 1986-04-07 | 1986-04-07 | Metal laminate with adhesive containing conductive particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62234925A true JPS62234925A (en) | 1987-10-15 |
| JPH0611527B2 JPH0611527B2 (en) | 1994-02-16 |
Family
ID=13687989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61079370A Expired - Lifetime JPH0611527B2 (en) | 1986-04-07 | 1986-04-07 | Metal laminate with adhesive containing conductive particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0611527B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015030238A (en) * | 2013-08-06 | 2015-02-16 | Dic株式会社 | Laminate substrate, adhesive sheet and electronic apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5599245U (en) * | 1978-12-28 | 1980-07-10 | ||
| JPS5751453A (en) * | 1980-06-04 | 1982-03-26 | Sumitomo Metal Ind | Bonded clad metallic plate which can be spot-welded |
| JPS57146649A (en) * | 1981-03-09 | 1982-09-10 | Kawasaki Steel Co | Vibration inhibiting material having excellent spot welding capability |
| JPS58160141A (en) * | 1982-03-18 | 1983-09-22 | 川崎製鉄株式会社 | Composite light material capable of spot-welding |
| JPS60133695U (en) * | 1984-02-15 | 1985-09-06 | 凸版印刷株式会社 | Electromagnetic shielding material |
-
1986
- 1986-04-07 JP JP61079370A patent/JPH0611527B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5599245U (en) * | 1978-12-28 | 1980-07-10 | ||
| JPS5751453A (en) * | 1980-06-04 | 1982-03-26 | Sumitomo Metal Ind | Bonded clad metallic plate which can be spot-welded |
| JPS57146649A (en) * | 1981-03-09 | 1982-09-10 | Kawasaki Steel Co | Vibration inhibiting material having excellent spot welding capability |
| JPS58160141A (en) * | 1982-03-18 | 1983-09-22 | 川崎製鉄株式会社 | Composite light material capable of spot-welding |
| JPS60133695U (en) * | 1984-02-15 | 1985-09-06 | 凸版印刷株式会社 | Electromagnetic shielding material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015030238A (en) * | 2013-08-06 | 2015-02-16 | Dic株式会社 | Laminate substrate, adhesive sheet and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0611527B2 (en) | 1994-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2808352A (en) | Electrically conductive adhesive tape | |
| JP4403360B2 (en) | Conductive adhesive sheet | |
| JP5025825B2 (en) | Conductive particles with insulating particles, anisotropic conductive material, and connection structure | |
| US3762946A (en) | Small particle loaded electrically conductive adhesive tape | |
| EP2884590B1 (en) | Anisotropic conductive film, connection method, and assembly | |
| CN103140126A (en) | Shield film, shielded printed wiring board, and method for manufacturing shield film | |
| KR20130131236A (en) | Electroconductive thin adhesive sheet | |
| US4478915A (en) | Corrosion resistant shim for electrically joining incompatible materials | |
| JP2005277145A (en) | Electromagnetic wave shielding adhesive sheet | |
| JP2016519390A (en) | System and method for providing surface connectivity of oriented conductive channels | |
| JP3992360B2 (en) | Conductive adhesive tape | |
| JP4673573B2 (en) | Method for manufacturing electromagnetic shielding material | |
| JPS62227986A (en) | Conductive double-face self-adhesive tape | |
| JP2006298954A (en) | Electroconductive adhesive sheet and circuit board | |
| JPS62234925A (en) | Metal laminate material with adhesive containing conductive particles | |
| KR102530373B1 (en) | Conductive adhesive sheet | |
| JPH0830175B2 (en) | Conductive adhesive and conductive adhesive sheet using this adhesive | |
| JPS61231066A (en) | Anisotropically conductive hot-melt adhesive | |
| JPS62227985A (en) | Conductive double-face self-adhesive tape | |
| JP2001146578A (en) | Conductive silicone pressure-sensitive adhesive composition and conductive pressure-sensitive adhesive tape | |
| JP2006060008A (en) | Sheet-like composite magnetic substance and sheet article | |
| WO2019077909A1 (en) | Electroconductive adhesive | |
| JPS6248784A (en) | Sheet conductive adhesive | |
| JPS6357226A (en) | Resin laminated steel plate | |
| JPS627195A (en) | Anisotropic conducting sticky adhesive layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |