JPH0411949B2 - - Google Patents
Info
- Publication number
- JPH0411949B2 JPH0411949B2 JP21866583A JP21866583A JPH0411949B2 JP H0411949 B2 JPH0411949 B2 JP H0411949B2 JP 21866583 A JP21866583 A JP 21866583A JP 21866583 A JP21866583 A JP 21866583A JP H0411949 B2 JPH0411949 B2 JP H0411949B2
- Authority
- JP
- Japan
- Prior art keywords
- styrene resin
- nonwoven fabric
- weight
- sheet
- skin 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.)
- Expired
Links
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 56
- 229920005989 resin Polymers 0.000 claims description 35
- 239000011347 resin Substances 0.000 claims description 35
- 239000004745 nonwoven fabric Substances 0.000 claims description 28
- 239000010410 layer Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 20
- 239000002216 antistatic agent Substances 0.000 claims description 15
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 10
- 239000012790 adhesive layer Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 238000003475 lamination Methods 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- 229920001038 ethylene copolymer Polymers 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 238000009823 thermal lamination Methods 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- -1 polyoxyethylene Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical class C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- MYPDDNAJRRJUCE-UHFFFAOYSA-N buta-1,3-diene;2-methylprop-2-enenitrile;styrene Chemical compound C=CC=C.CC(=C)C#N.C=CC1=CC=CC=C1 MYPDDNAJRRJUCE-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Description
本発明は、フロツピーデイスク用ジヤケツト
（以下ジヤケツトと略）に関し、詳しくは、不織
布との接着性がすぐれかつ耐熱性の高い性能を有
するフロツピーデイスク用ジヤケツトに関する。
従来この種のジヤケツトは、硬質塩化ビニル樹
脂を主成分とするシートに不織布を貼り合せ、栽
断折曲加工して製造しているが、塩化ビニル樹脂
が主成分であるため、熱変形温度が60〜70℃程度
である。そのため、不織布を熱ラミネートする際
に高温でラミネートすると、シートが変形した
り、不織布のパターンがラミネート面と反対面に
うつり商品価値を著しく損う。また不織布ラミネ
ートの適温域が狭いためラミネートロスが大きい
欠点を有している。
更に、熱ラミネート時や折曲加工時の熱により
有毒ガスが発生し作業環境を悪くしている欠点を
有する。
本発明は、かかる欠点を解決したものであり、
接着剤を介して帯電防止剤混入スチレン系樹脂シ
ートと不織布を貼り合せることにより、耐熱性が
すぐれており、更に不織布との低温でも接着可能
な熱接着層を独立して設けているため不織布との
熱ラミネート時に不織布のパターンが裏移りする
ことがないため商品価値がすぐれると共にラミネ
ート温度領域が硬質塩化ビニル樹脂に比べ30℃以
上有するためラミネート作業効率がすぐれている
特徴を有するものである。更にベース樹脂がスチ
レン系樹脂であるため、熱ラミネート及び熱折曲
時に有害ガス等による作業環境の悪化からのがれ
られる利点を兼備しているプロツピーデイスク用
ジヤケツトを提供するものである。
すなわち、本発明は、(A)スチレン系樹脂と帯電
防止剤とのシート、又はスチレン系樹脂と帯電防
止剤とのフイルム及びスチレン系樹脂シートから
なる表皮材層、(B)オレフイン共重合体又は該オレ
フイン共重合体とスチレン系樹脂との混合物の接
着剤層、(C)不織布層からなることを特徴とする。
本発明のジヤケツトの断面構成は、第１図及び
第２図に示す多層シートよりなつている。すなわ
ち、第１図は、スチレン系樹脂と帯電防止剤との
シートからなる表皮材層１と接着剤層１及び不織
布層３との多層シートであり、第２図は、スチレ
ン系樹脂と帯電防止剤とのフイルムからなる表皮
剤(A)層４とスチレン系樹脂シートの表皮材(B)層５
とからなる表皮材層１と接着剤層２及び不織布層
３との多層シートである。
本発明の表皮材に用いられるフイルム及びシー
トのスチレン系樹脂は、耐衝撃性スチレン樹脂、
耐衝撃性スチレン樹脂を少なくとも20重量％と一
般用スチレン樹脂との混合物、アクリルニトリル
−スチレン−ブタジエン共重合体、メタクリロニ
トリル−スチレン−ブタジエン共重合体、スチレ
ン−ブタジエンブロツク共重合体等がある。また
帯電防止剤は、非イオン系及び陰イオン系界面活
性剤、特にアルキルアミン系帯電防止剤が好まし
く、例えば、Ｎ，Ｎ−ビス（２−ヒドロキシエチ
ル）牛脂アミン、ポリオキシエチレンラウリルア
ミン、ポリオキシエチレンウリルアミンの脂肪酸
エステルなどがある。この帯電防止剤の添加量
は、スチレン系樹脂100重量部に対して、0.1〜７
重量部、好ましくは0.5〜５重量部である。添加
量が0.1重量部未満では、帯電防止効果が劣るた
め、ジヤケツトに塵埃が付着しやすくまた７重量
部を越えると、滑性効果が強く押出時にスリツプ
したり、さらに表皮材表面にブリードする。
次に、接着剤層に用いられる樹脂は、不織布及
び表皮材の両方に接着力があるものが要求され、
オレフイン共重合体、例えばエチレン共重合体又
は変性オレフイン共重合体の単独、又はこれらの
樹脂と前記表皮材のスチレン系樹脂との混合物が
好ましい。エチレン共重合体は、エチレンと酢酸
ビニル、１−ブテン等との共重合体から選択され
たもの、また変性オレフイン共重合体は、例えば
２−オレフインを不飽和カルボン酸又はその無水
物で変性したもので、エチレン−酢酸ビニル共重
合体の変性体が特に好ましい。さらにこれらエチ
レン共重合体又は変性オレフイン共重合体とスチ
レン系樹脂との混合際その混合割合は、スチレン
系樹脂が90重量％以下であることが好ましく、90
重量％を越えると、不織布とのラミネート接着強
度が劣る。
さらに、本発明の不織布は、ポリエステル製、
レーヨン製、岩綿製等のものから自由に選択する
ことができる。また前記表皮材には、接着剤の添
加や印刷を施すことも可能である。
本発明のジヤケツトの多層シートは、通常全体
肉厚で300〜500μであり、表皮材層は、150〜
230μ程度のジヤケツト強度の面で好ましい。ま
たこの多層シートの熱可塑性樹脂部分は、共押出
法、ラミネート法及び併用のいづれでも差支えな
い。
以上のように本発明は、接着剤の両面にスチレ
ン系樹脂と帯電防止剤との表皮材層及び不織布層
をラミネートしたフロツピーデイスク用ジヤケツ
トであつて、耐熱性、ラミネート作業効率の向上
及び不織布のパターン裏移りのない商品価値にす
ぐれたものである。
以下実施例により本発明を詳細に説明する。
実施例 １
共押出法により、ABS樹脂100重量部、帯電防
止剤(1)５重量部、カーボンブラツク３重量部から
なる表皮材層200μと、変形オレフイン共重合体
70重量％とABS樹脂30重量％との混合物からな
る接着剤層30μｍとの多層シートを押出した。次
に、この多層シートは、ポリエステル製の不織布
とラミネートする温度条件を単発シーラーを用い
て測定した。結果を表に示す。またジヤケツトと
するため多層シートを170×300ｍ／ｍ角に切断
し、不織布を200℃でラミネートし、５インチフ
ロツピーデイスクジヤケツトサイズに180℃で折
曲げ、周辺部を190℃でヒートシールしてジヤケ
ツトを作製した。
得られたジヤケツトの外観は、裏移り、変形が
なく良好であり、不織布ラミネート、折曲げの熱
加工時における悪臭も感知されなかつた。
実施例 ２
共押出法による、耐衝撃性スチレン樹脂100重
量部、帯電防止剤(2)３重量部、カーボンブラツク
３重量部からなるフイルム25μと耐衝撃性スチレ
ン樹脂100重量部とカーボンブラツク３重量部と
のシート200μからなる表皮材層225μと、変形オ
レフイン50重量％と耐衝撃性スチレン樹脂50重量
％との混合物からなる接着剤層25μとの多層シー
トを押出した。また、この多層シートと不織布と
のラミネートは、実施例１と同様の単発シーラー
を用いて測定した。結果を表に示す。さらにジヤ
ケツト仕上げは、折曲げ温度170℃、周辺部を160
℃でヒートシールしてジヤケツトを作製した。得
られたジヤケツトの外観は、裏移り、変形がなく
良好であり、不織布ラミネート、折曲げの熱加工
時における悪臭も感知されなかつた。
比較例 １
実施例１の表皮材のかわりに硬質塩化ビニル樹
脂シートを用いて、不織布とのラミネート条件を
測定した。結果を表に示す。ラミネート温度範囲
が非常に狭いものであつた。
The present invention relates to a jacket for a floppy disk (hereinafter simply referred to as a jacket), and more particularly to a jacket for a floppy disk that has excellent adhesion to nonwoven fabrics and high heat resistance. Conventionally, this type of jacket has been manufactured by pasting non-woven fabric onto a sheet whose main component is hard vinyl chloride resin, and cutting and bending the sheet, but since the main component is vinyl chloride resin, the heat distortion temperature is low. The temperature is about 60-70℃. Therefore, if the nonwoven fabric is thermally laminated at high temperatures, the sheet may be deformed or the pattern of the nonwoven fabric may be transferred to the opposite side of the laminated surface, significantly reducing the product value. Furthermore, since the suitable temperature range of nonwoven fabric laminate is narrow, it has the disadvantage of large laminate loss. Furthermore, it has the disadvantage that toxic gases are generated due to the heat generated during thermal lamination and bending, making the work environment worse. The present invention solves these drawbacks,
By bonding a styrene-based resin sheet containing an antistatic agent and a non-woven fabric with an adhesive, it has excellent heat resistance. Furthermore, it has an independent thermal adhesive layer that can be bonded to the non-woven fabric even at low temperatures, so it can be bonded to the non-woven fabric. It has excellent commercial value because the pattern of the nonwoven fabric does not set off during thermal lamination, and the lamination temperature range is 30°C or more compared to hard vinyl chloride resin, so it has excellent lamination work efficiency. Furthermore, since the base resin is a styrene resin, the present invention provides a jacket for a professional disk that has the advantage of being able to avoid deterioration of the working environment due to harmful gases during thermal lamination and thermal bending. That is, the present invention provides (A) a sheet of a styrene resin and an antistatic agent, or a skin material layer consisting of a film and a styrene resin sheet of a styrene resin and an antistatic agent, (B) an olefin copolymer, or It is characterized by comprising an adhesive layer made of a mixture of the olefin copolymer and styrene resin, and (C) a nonwoven fabric layer. The cross-sectional structure of the jacket of the present invention consists of a multilayer sheet as shown in FIGS. 1 and 2. That is, FIG. 1 shows a multilayer sheet consisting of a skin material layer 1 made of a sheet of styrene resin and an antistatic agent, an adhesive layer 1, and a nonwoven fabric layer 3, and FIG. 2 shows a multilayer sheet made of a sheet of styrene resin and an antistatic agent. A skin material (A) layer 4 consisting of a film with a styrene resin sheet and a skin material (B) layer 5 of a styrene resin sheet.
This is a multilayer sheet consisting of a skin material layer 1, an adhesive layer 2, and a nonwoven fabric layer 3. The styrene resin of the film and sheet used for the skin material of the present invention includes impact-resistant styrene resin,
Mixtures of at least 20% by weight of impact resistant styrene resins and general styrene resins, acrylonitrile-styrene-butadiene copolymers, methacrylonitrile-styrene-butadiene copolymers, styrene-butadiene block copolymers, etc. . The antistatic agent is preferably a nonionic or anionic surfactant, especially an alkylamine antistatic agent, such as N,N-bis(2-hydroxyethyl) tallow amine, polyoxyethylene lauryl amine, or These include fatty acid esters of oxyethyleneurylamine. The amount of the antistatic agent added is 0.1 to 7 parts by weight per 100 parts by weight of the styrene resin.
Parts by weight, preferably 0.5 to 5 parts by weight. If the amount added is less than 0.1 part by weight, the antistatic effect will be poor, so dust will easily adhere to the jacket, and if it exceeds 7 parts by weight, the slippery effect will be strong, causing slips during extrusion or bleeding on the surface of the skin material. Next, the resin used for the adhesive layer is required to have adhesive strength to both the nonwoven fabric and the skin material.
Preferably, an olefin copolymer such as an ethylene copolymer or a modified olefin copolymer is used alone, or a mixture of these resins and the styrene resin of the skin material. The ethylene copolymer is selected from copolymers of ethylene and vinyl acetate, 1-butene, etc., and the modified olefin copolymer is, for example, a 2-olefin modified with an unsaturated carboxylic acid or its anhydride. Of these, modified ethylene-vinyl acetate copolymers are particularly preferred. Further, when mixing these ethylene copolymers or modified olefin copolymers with styrene resin, the mixing ratio is preferably 90% by weight or less of styrene resin, and 90% by weight or less of styrene resin.
If it exceeds % by weight, the lamination adhesive strength with the nonwoven fabric will be poor. Furthermore, the nonwoven fabric of the present invention is made of polyester,
You can freely choose from rayon, rock wool, etc. Further, it is also possible to add an adhesive or print on the skin material. The multilayer sheet of the jacket of the present invention usually has an overall thickness of 300 to 500 μm, and the skin material layer has a thickness of 150 to 500 μm.
It is preferable in terms of jacket strength of about 230μ. The thermoplastic resin portion of this multilayer sheet may be formed by coextrusion, lamination, or a combination thereof. As described above, the present invention is a jacket for a floppy disk in which a skin material layer of styrene resin and an antistatic agent and a nonwoven fabric layer are laminated on both sides of an adhesive, which improves heat resistance and lamination work efficiency, and provides a nonwoven fabric layer. It has excellent commercial value with no pattern bleed. The present invention will be explained in detail below with reference to Examples. Example 1 A 200μ skin material layer consisting of 100 parts by weight of ABS resin, 5 parts by weight of antistatic agent (1), and 3 parts by weight of carbon black, and a modified olefin copolymer were prepared by coextrusion method.
A multilayer sheet with a 30 μm adhesive layer consisting of a mixture of 70% by weight and 30% by weight of ABS resin was extruded. Next, the temperature conditions for laminating this multilayer sheet with a polyester nonwoven fabric were measured using a single-shot sealer. The results are shown in the table. To make a jacket, the multilayer sheet was cut into 170 x 300 m/m squares, laminated with nonwoven fabric at 200°C, bent at 180°C to the size of a 5-inch floppy disk jacket, and the peripheral portion was heat-sealed at 190°C. A jacket was manufactured using the following steps. The outer appearance of the obtained jacket was good, with no set-off or deformation, and no bad odor was detected during the thermal processing of nonwoven fabric lamination and folding. Example 2 A 25μ film made of 100 parts by weight of impact-resistant styrene resin, 3 parts by weight of antistatic agent (2), and 3 parts by weight of carbon black, 100 parts by weight of impact-resistant styrene resin, and 3 parts by weight of carbon black was prepared by co-extrusion method. A multilayer sheet was extruded, consisting of a skin material layer of 225 μm consisting of 200 μm of the sheet and a 25 μm adhesive layer consisting of a mixture of 50% by weight of modified olefin and 50% by weight of impact-resistant styrene resin. Further, the lamination of this multilayer sheet and nonwoven fabric was measured using the same single-shot sealer as in Example 1. The results are shown in the table. Furthermore, the jacket finishing is done at a bending temperature of 170°C and a temperature of 160°C for the periphery.
A jacket was prepared by heat sealing at ℃. The appearance of the obtained jacket was good, with no set-off or deformation, and no bad odor was detected during the heat processing of nonwoven fabric lamination and folding. Comparative Example 1 A hard vinyl chloride resin sheet was used instead of the skin material of Example 1, and the lamination conditions with a nonwoven fabric were measured. The results are shown in the table. The lamination temperature range was very narrow.
【表】
単発シール機：オオヨシ製
物性測定
ラミネート強度：表皮材と不織布とを手で持
ち剥離を行つた。
○は、不織布が材破、△は、ラミネート界面
剥離
不織布裏移り：目視で裏移りの状態を判定し
た。
○は、なし、△は、ややあり、×は、あり
次に多層シートの各成分は、下記の通りであ
る。
(1) ABS樹脂：電気化学工業(株)製、商品名デン
カABS、GR−2000
(2) 耐衝撃製スチレン樹脂：電気化学工業(株)製、
商品名デンカスチロールHI−Ｒ−５
(3) 帯電防止剤(1)：三洋化成工業(株)製、商品名ケ
ミスタツト3033
(4) 帯電防止剤(2)：花王石鹸(株)製、商品名エレク
トロストリツプPC
(5) カーボンブラツク：三菱カーボン(株)製、商品
名MA−100
(6) 変性オレフイン共重合体：三菱油化(株)製、商
品名モデイツクＥ−300K[Table] Single-shot sealing machine: Measurement of physical properties made by Ooyoshi Lamination strength: The skin material and nonwoven fabric were held and peeled by hand. ◯ indicates that the nonwoven fabric is broken, and △ indicates that the laminate interface has peeled off. Nonwoven fabric set-off: The state of set-off was visually determined. ○: None, △: Slightly present, ×: Present Next, each component of the multilayer sheet is as follows. (1) ABS resin: Manufactured by Denki Kagaku Kogyo Co., Ltd., product name Denka ABS, GR-2000 (2) Impact-resistant styrene resin: Manufactured by Denki Kagaku Kogyo Co., Ltd.
Product name Dencastyrol HI-R-5 (3) Antistatic agent (1): Manufactured by Sanyo Chemical Industries, Ltd., product name Chemistat 3033 (4) Antistatic agent (2): Manufactured by Kao Soap Co., Ltd., product name Electrostrip PC (5) Carbon black: manufactured by Mitsubishi Carbon Co., Ltd., trade name MA-100 (6) Modified olefin copolymer: manufactured by Mitsubishi Yuka Co., Ltd., trade name Modic E-300K
第１図及び第２図は、本発明のジヤケツト用多
層シートの断面概略図を示す。
１……表皮材層、２……接着剤層、３……不織
布層、４……表皮材(A)層、５……表皮材(B)層。
1 and 2 show schematic cross-sectional views of the multilayer sheet for jackets of the present invention. 1...Skin material layer, 2...Adhesive layer, 3...Nonwoven fabric layer, 4...Skin material (A) layer, 5...Skin material (B) layer.
Claims (1)
又はスチレン系樹脂と帯電防止剤とのフイルム及
びスチレン系樹脂シートからなる表皮材層、(B)オ
レフイン共重合体又は該オレフイン共重合体とス
チレン系樹脂との混合物の接着剤層、(C)不織布層
からなるフロツピーデイスク用ジヤケツト。1 (A) Sheet of styrene resin and antistatic agent,
or a skin material layer consisting of a film of styrene resin and an antistatic agent or a styrene resin sheet, (B) an adhesive layer of an olefin copolymer or a mixture of the olefin copolymer and a styrene resin, (C) A jacket for floppy disks made of a non-woven fabric layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21866583A JPS60113374A (en) | 1983-11-22 | 1983-11-22 | Jacket for floppy disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21866583A JPS60113374A (en) | 1983-11-22 | 1983-11-22 | Jacket for floppy disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60113374A JPS60113374A (en) | 1985-06-19 |
| JPH0411949B2 true JPH0411949B2 (en) | 1992-03-03 |
Family
ID=16723500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21866583A Granted JPS60113374A (en) | 1983-11-22 | 1983-11-22 | Jacket for floppy disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60113374A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61170971A (en) * | 1985-01-24 | 1986-08-01 | Teijin Memorex Kk | Jacket for floppy disc |
| JPS6292189A (en) * | 1985-10-17 | 1987-04-27 | Sony Corp | Floppy disk |
| JP4720218B2 (en) * | 2005-03-08 | 2011-07-13 | Ｊｆｅスチール株式会社 | Edge overcoat prevention device |
-
1983
- 1983-11-22 JP JP21866583A patent/JPS60113374A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60113374A (en) | 1985-06-19 |
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