JPS59116973A - Slide sheet for cassette tape - Google Patents
Slide sheet for cassette tapeInfo
- Publication number
- JPS59116973A JPS59116973A JP22551382A JP22551382A JPS59116973A JP S59116973 A JPS59116973 A JP S59116973A JP 22551382 A JP22551382 A JP 22551382A JP 22551382 A JP22551382 A JP 22551382A JP S59116973 A JPS59116973 A JP S59116973A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- carbon black
- sheet
- tetrafluoroethylene
- extrusion
- 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
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920000642 polymer Polymers 0.000 claims abstract description 16
- 229920001577 copolymer Polymers 0.000 claims abstract description 12
- 239000006229 carbon black Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 12
- 229920005672 polyolefin resin Polymers 0.000 claims description 7
- 239000012778 molding material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 12
- 229920000573 polyethylene Polymers 0.000 abstract description 9
- -1 polyethylene Polymers 0.000 abstract description 9
- 239000004698 Polyethylene Substances 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 4
- 229920000098 polyolefin Polymers 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- 239000005977 Ethylene Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- WCVOGSZTONGSQY-UHFFFAOYSA-N 2,4,6-trichloroanisole Chemical class COC1=C(Cl)C=C(Cl)C=C1Cl WCVOGSZTONGSQY-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 235000019506 cigar Nutrition 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/04—Magazines; Cassettes for webs or filaments
- G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
- G11B23/087—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores
- G11B23/08707—Details
- G11B23/08757—Guiding means
- G11B23/08764—Liner sheets
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はカセット磁気録音用テープに内蔵される滑りシ
ートに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sliding sheet incorporated in a cassette magnetic recording tape.
一般にカセットテープにおいて、ケースとリールテープ
との間には、摩擦抵抗を感じ、かつテープの走行を滑ら
かにするために、滑りシートとして種々の材料からなる
シート部材が用いられでいる。代表的な例として導電性
カーボン入り超高分子量ポリエチレンシート、導電性カ
ーボン入り４フツ化エチレン重合物シート、シリコンを
含浸したカーボン入り特殊紙シート等が知られている。In general, in a cassette tape, a sheet member made of various materials is used as a sliding sheet between the case and the reel tape in order to feel frictional resistance and smooth the running of the tape. Typical examples include ultra-high molecular weight polyethylene sheets containing conductive carbon, tetrafluoroethylene polymer sheets containing conductive carbon, and special paper sheets containing carbon impregnated with silicon.
上述の滑りシートはいずれも次に挙げる何等かの欠点を
有しており、従って性能、加工性及び価格の全てを満足
するすぐれたシート部材の開発が望まれていた。All of the above-mentioned sliding sheets have some of the following drawbacks, and therefore, it has been desired to develop an excellent sheet member that satisfies all of performance, workability, and cost.
すなわち、等電性カーボン入り４フツ化エチレン重合物
シートは柔軟なため、取り扱い時にシート端面の曲り込
み、折れ、破れ等が発生しやすい。また加熱によってシ
ートが葉巻状にカールしやすく、耐熱性、形状安定性に
欠ける。That is, since the isoelectric carbon-containing tetrafluoroethylene polymer sheet is flexible, the end surface of the sheet is likely to bend, fold, tear, etc. during handling. Furthermore, the sheet tends to curl into a cigar shape when heated, and it lacks heat resistance and shape stability.
また融点が３２０℃以上と高く高温時の流動性に欠ける
ため、加工方法が一般に用いられる製膜法に比べ特殊な
機械・方法を用いなければならず、従って原料コストに
加えて加工コストが高いという欠点を有している。また
導電性カーボン入り超高分子量ポリエチレンシートは上
述の４ソツ化工チレン重合物の欠点を改良し、特に導電
性カーボン入り４フッ化エチレン重合物シートの柔軟さ
と原料コスト面を改良するものとして市販されたが完全
ではなく、４フツ化エチレン重合物と同様、高温時の流
動性に欠Ｃするため、特殊な加工方法によらねばならな
し）。すなわち、超高分子量ポリエチレン粉末とカーボ
生産効率が低く、加工コストが高い。また剛性が極めて
大きいので剪断強度が極めて大きく、所定形状に打抜き
加工する際に打抜刃を摩耗させたり、打抜製品に７（す
が生じる等の欠点カーある。またシリコンを含浸したカ
ーボンを含む特殊紙シートは、コストが低いという長所
゛をもつ反面、性能が劣り、特に、表面滑性、−耐摩耗
性。In addition, since the melting point is over 320°C and lacks fluidity at high temperatures, the processing method requires the use of special machines and methods compared to the commonly used film forming method, resulting in high processing costs in addition to raw material costs. It has the following drawbacks. In addition, conductive carbon-containing ultra-high molecular weight polyethylene sheets are commercially available to improve the above-mentioned disadvantages of 4-modified ethylene polymers, and in particular to improve the flexibility and raw material costs of conductive carbon-containing 4-fluoroethylene polymer sheets. However, it is not perfect, and like tetrafluoroethylene polymers, it lacks fluidity at high temperatures, so a special processing method must be used). That is, the production efficiency of ultra-high molecular weight polyethylene powder and carbs is low, and the processing cost is high. In addition, because the rigidity is extremely high, the shear strength is extremely high, and when punching into a predetermined shape, the punching blade may wear out, and the punched product may have defects such as 7 (scratches). Although the special paper sheets containing them have the advantage of low cost, they have poor performance, especially in terms of surface smoothness and abrasion resistance.
あるいは滑性効果のための突起を有する場合をは弾力性
が劣るという欠点があるＯ
本発明者は叙上の欠点を解消したカセットテープ用滑り
シートを開発すべく研究の結果、ポリオレフィン系樹脂
にカーボンブラック２〜３０重量％、４フツ化エチレン
重合物もしくは４フッ化エチレン−６フツ化プロピレン
共重合物もしくは４フツ化エチレン重合物と４フツイヒ
エチレン−６フツ化プロピレン共重合物の混合物２〜５
０重量％を混合した成形材料を該成形材料との接着性の
良すな樹脂と共に共押出し多層製膜してなるシートから
、適度の導電性、表面滑性、耐摩耗性、剛性、耐熱性、
及び形状安定性を備えたカセットテープ用滑りシートを
（尋ることかできるのみならず、シート材料を共押出し
により容易に製造でき、且つ原料コストのかかる４フツ
化エチレン重合物及び／又）ｔ ４フッ化エチレン−６
フツ化プロピレン共重合物を含む成形材料層をそれと接
着性の良好な樹脂と共に共押出しすることにより薄く形
成することができるので、誉廿チ＋（°−−低コ
ストでカセットテープ用滑りシートを提供し得炒
ることを見出し、かかる知見にもとづｌ／）て本発明を
完成したものである。Alternatively, if it has protrusions for a slippery effect, it has the disadvantage of poor elasticity.As a result of research to develop a sliding sheet for cassette tapes that eliminates the above-mentioned drawbacks, the present inventor has developed a polyolefin resin. 2 to 30% by weight of carbon black, tetrafluoroethylene polymer, tetrafluoroethylene-hexafluoropropylene copolymer, or mixture of tetrafluoroethylene polymer and tetrafluoroethylene-hexafluoropropylene copolymer 2 ~5
A sheet made by coextruding a molding material containing 0% by weight with a resin that has good adhesion to the molding material to form a multilayer film, has appropriate conductivity, surface smoothness, abrasion resistance, rigidity, and heat resistance. ,
and a sliding sheet for cassette tapes with shape stability (not only can the sheet material be easily produced by coextrusion, but also can be produced using tetrafluoroethylene polymer and/or which requires raw material costs). Tetrafluoroethylene-6
By coextruding a molding material layer containing a fluorinated propylene copolymer with a resin that has good adhesive properties, it can be formed into a thin layer, making it possible to create a sliding sheet for cassette tapes at a low cost. The present invention has been completed based on this knowledge.
即ち、本考案の要旨は共押出し多層製膜された、ポリオ
レフィン系樹脂にカーボンブラック２〜３０重量係、４
フツ化エチレン重合物もしくは４フッ化エチレン−６フ
ツ化プロピレン共重合物もしくは４フツ化エチレン重合
物と４フッ化エチレン−６フツ化プロピレン共重合物の
混合物２〜５０重量％を混合した成形材料よりなる、１
層又は２ Ｉｔ！！の導電性且つ滑性樹脂層と、該層を
支持する支持樹脂層よりなる積層シートにより構成され
たカセットテープ用滑りシートである。 ′
以下、本発明につき詳細に説明する。That is, the gist of the present invention is to form a multilayer film by coextrusion, in which a polyolefin resin is coated with carbon black in a proportion of 2 to 30% by weight, and 4.
Molding material mixed with 2 to 50% by weight of a fluorinated ethylene polymer, a tetrafluorinated ethylene-hexafluorinated propylene copolymer, or a mixture of a tetrafluorinated ethylene polymer and a tetrafluorinated ethylene-hexafluorinated propylene copolymer consists of 1
Layer or 2 It! ! This sliding sheet for cassette tapes is composed of a laminated sheet consisting of a conductive and slippery resin layer and a supporting resin layer that supports the layer. ' The present invention will be explained in detail below.
本発明のカセットテープ用滑りシートは共押出し多層製
膜された、ポリオレフィン・・□系樹脂にカーボンブラ
ック２〜３０重＠チ、４フツ化エチレン重合物もしくは
４フッ化エチレン−６フツ化プロピレン共重合物もしく
は４フツ化エチレン重合物と４フッ化エチレン−６フツ
化プロピレン共重合物の混合物２〜５０重量％を混合し
た成形材料よりなる、１層又は２層の導電性及び滑性を
付与した樹脂層と、該層を支持する支持樹脂層よりなる
積層シートからなる。The sliding sheet for cassette tapes of the present invention is a multilayer coextrusion film made of polyolefin... One or two layers of a molding material containing 2 to 50% by weight of a polymer or a mixture of a tetrafluoroethylene polymer and a tetrafluoroethylene-hexafluoropropylene copolymer, imparting conductivity and lubricity. It consists of a laminated sheet consisting of a resin layer and a supporting resin layer that supports the layer.
而して本発明において、導電性且つ滑性樹脂層を構成す
るポリオレフィン系樹脂として、押出成形用のポリエチ
レンで、メルトインデックスが０．０１〜１０．０ｐ７
１０分程度で好ましくは０．０５〜５．０Ｐ／１０分、
密度が、０．９４０以上の高密度ポリエチレンが良く、
この材料は適度な剛度、耐衝撃性を有し、かつ、従来の
超高分子量ポリエチレンや４フツ化エチレン重合物に比
べ、加工適性にすぐれ、汎用のポリエチレンフィルムを
製膜する時に使用するＴダイ押出機やインフレーション
押出機を利用して製膜できる。またポリエチレンの代り
にポリオレフィン系樹脂としてポリエチレン−酢酸ビニ
ル共重合体、ポリエチレン−エチルアクリレート共重合
体、ポリプロピレン、ポリエチレンに種々の添加剤、た
とえば酸化防止剤、滑剤、ブロッキング防止剤、帯電防
止剤、充填剤等を含む樹脂、アイオノマー樹脂等の押出
し成型可能な樹脂を利用することもできる。In the present invention, the polyolefin resin constituting the conductive and slippery resin layer is polyethylene for extrusion molding and has a melt index of 0.01 to 10.0p7.
About 10 minutes, preferably 0.05 to 5.0P/10 minutes,
High-density polyethylene with a density of 0.940 or more is preferable;
This material has appropriate stiffness and impact resistance, and has superior processability compared to conventional ultra-high molecular weight polyethylene and tetrafluoroethylene polymers, and is suitable for T-die use when forming general-purpose polyethylene films. Films can be formed using an extruder or inflation extruder. In addition, polyethylene-vinyl acetate copolymer, polyethylene-ethyl acrylate copolymer, polypropylene, polyethylene and various additives such as antioxidants, lubricants, antiblocking agents, antistatic agents, and fillers can be used as polyolefin resins instead of polyethylene. It is also possible to use extrusion moldable resins such as resins containing agents and ionomer resins.
次に前記ポリオレフィン系樹脂に混合するカーボンブラ
ックとしては、導電性カーボンブラックの粉末、すなわ
ち粒子径が１０〜６０ｒＬＩＩｎ、吸油量がＩ ＤＯ〜
４００（！［１／１００５Ｌで、アセチレンの熱分解法
又は、重油の不完全燃焼法により生産され、ケッチェン
ブラック、アセチレンブラック、ファーネスブラック等
の名称で重版されているものを適用し得る。Next, the carbon black to be mixed with the polyolefin resin is conductive carbon black powder, that is, a particle size of 10 to 60rLIIn and an oil absorption of IDO to
400 (! [1/1005 L), produced by the thermal decomposition method of acetylene or the incomplete combustion method of heavy oil, and reprinted with names such as Ketjen black, acetylene black, and furnace black can be applied.
次に前記ポリオレフィン系樹脂に混合する４フツ化エチ
レン重合物及び／又は４フッ化エチレン−６フツ化プロ
ピレン共重合物としては、添加剤用の粉末を用い５、好
ましくは粒径が１０μ以下のものを用いる。Next, as the tetrafluoroethylene polymer and/or the tetrafluoroethylene-hexafluoropropylene copolymer to be mixed with the polyolefin resin, powder for additives5 is used, preferably with a particle size of 10μ or less. use something
次にカーボンブラックの配合割合は２〜５０重量％で、
シートに成形した場合に表面抵抗値が１０２〜１０１２
Ωの範囲に入ることが好ましく、２％以下だと１０１２
Ω以上となり、帯電防止性能が劣Ｉ（′ｊｖ″５０１以
上だとポリエチレンの高温時の流動性が低下し、製膜加
工が困難となる。Next, the blending ratio of carbon black is 2 to 50% by weight,
When formed into a sheet, the surface resistance value is 102 to 1012.
It is preferable to fall within the range of Ω, and if it is less than 2%, it is 1012
Ω or more, and the antistatic performance is poor I ('jv'' If it is 501 or more, the fluidity of polyethylene at high temperatures decreases, making film forming processing difficult.
次に４ブツ化工チレン重合物及び／又は４フッ化エチレ
ン−６フツ化プロピレン共重合物の配合割合は２〜５０
重量％で、シートに成形した場合に摩擦係数が０．１５
以下にな゛ることが好ましい。Next, the blending ratio of 4-but modified tyrene polymer and/or tetrafluoroethylene-hexafluoropropylene copolymer is 2 to 50.
Friction coefficient is 0.15 when formed into a sheet in weight%
The following is preferable.
次に本発明において、支持樹脂層の材料として、ポリエ
チレン、エチレン−酢酸ビニル共重合体、エチレン−エ
チルアクリレート共重合体、ポリプロピレン、アイオノ
マー樹脂、ボリスチレ・ン系樹脂、ポリアミド樹脂など
を適用し得る。Next, in the present invention, polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polypropylene, ionomer resin, polystyrene resin, polyamide resin, etc. can be used as the material for the supporting resin layer.
尚、支持樹脂層用の材料と導電性且つ滑性樹脂層の材料
を共押出しする際、両層間に適当な接着剤層を介在させ
、支持樹脂層／接着剤層／導電性且つ滑性樹脂層の３層
に共押ししても良い。In addition, when co-extruding the material for the support resin layer and the material for the conductive and slippery resin layer, an appropriate adhesive layer is interposed between both layers, and the support resin layer/adhesive layer/conductive and slippery resin It is also possible to press the three layers together.
支持構脂層は、カセットテープ用滑りシート用材料とし
て適度の剛性、耐熱性、及び形状安定性をシートに付与
するものである。The support structural resin layer provides the sheet with appropriate rigidity, heat resistance, and shape stability as a material for a sliding sheet for a cassette tape.
第１図及び第２図は、本発明に係るカセットテープ用滑
りシート（１）の例を示す。FIGS. 1 and 2 show an example of a cassette tape sliding sheet (1) according to the present invention.
このシート（１）は支持樹脂層（２）と導電性且つ滑性
樹脂層（３）よりなる積層シート（４）により構成され
るものである。This sheet (1) is composed of a laminated sheet (4) consisting of a support resin layer (2) and a conductive and slippery resin layer (3).
第３図は他の本発明に係るカセットテープ用性を４本局
−２充ヨ樹゛脂層（３ａ） （３ｂ）よりなる積層シー
ト（６）により構成されるものである。FIG. 3 shows another cassette tape according to the present invention, which is composed of a laminated sheet (6) consisting of four main layers and two full resin layers (3a) and (3b).
以上、詳記した通り、本発明のカセットテープ用滑すシ
ートは適度の表面滑性、耐摩耗性、剛性、耐熱性、及び
形状安定性を有し、取り扱い時にシート端面の曲り込み
、折れ、破れ等が発生することがなく、又、加熱による
カール変形が生ずることもない利点を有するものである
。As detailed above, the sliding sheet for cassette tapes of the present invention has appropriate surface smoothness, abrasion resistance, rigidity, heat resistance, and shape stability, and the sheet end surface does not bend or fold during handling. This has the advantage that no tearing occurs, and no curling deformation occurs due to heating.
又、本発明のカセットテープ用滑りシートは低コストで
製造し得る利点を有するものである。Furthermore, the sliding sheet for cassette tapes of the present invention has the advantage that it can be manufactured at low cost.
第１図及び第２図は本発明のカセットテープ用滑りシー
トの第１実施例を示し、第１図は正面図、第２図は第１
図示のＡ−Ａ’線矢視断面図、！１！３図は本発明のカ
セットテープ用滑りシートの第２実施例の断面図である
。
（１）、（５）・・・・・・・・・・・・カセットテー
プ用滑りシート（２）・・・・・・・・・・・・・・・
・・・支持樹脂層（３）、（３ａ）、（３ｂ）・・・導
電性且つ滑性樹脂層（４）、 （ｆｔ）・・・・・・・
・・・・・積層シート特許出願人 大日本印刷株式会社
代理人 弁理士 小 西 淳 美
第１図
第２図
第３図1 and 2 show a first embodiment of the sliding sheet for cassette tape of the present invention, FIG. 1 is a front view, and FIG. 2 is a first embodiment of the sliding sheet for cassette tape.
A sectional view taken along the line A-A' shown in the figure! Figures 1 and 3 are cross-sectional views of a second embodiment of the sliding sheet for cassette tapes of the present invention. (1), (5)・・・・・・・・・・・・Slip sheet for cassette tape (2)・・・・・・・・・・・・・・・
... Supporting resin layer (3), (3a), (3b) ... Conductive and slippery resin layer (4), (ft) ...
...Laminated sheet patent applicant Dai Nippon Printing Co., Ltd. Agent Patent attorney Atsushi Konishi Figure 1 Figure 2 Figure 3
Claims (1)
ボンブラック２〜３０重量％、４フツ化エチレン重合物
もしくは４フッ化エチレン−６フツ化プロピレン共重合
物もしくは４フツ化エチレン重合物と４フッ化エチレン
−６フツ化プロピレン共重合物の混合物２〜５０重量係
重量台した成形材料よりなる、１層又は２層の導電性且
つ滑性樹脂層と、該層を支持する支持樹脂層よりなる積
層シートにより構成されたカセットテープ用滑りシート
。2 to 30% by weight of carbon black, tetrafluoroethylene polymer, tetrafluoroethylene-hexafluoropropylene copolymer, or tetrafluoroethylene polymer and tetrafluoroethylene, coextruded into a multi-layered polyolefin resin. A laminate consisting of one or two electrically conductive and slippery resin layers made of a molding material containing a mixture of ethylene-hexafluorinated propylene copolymer with a weight ratio of 2 to 50, and a support resin layer that supports the layers. A sliding sheet for cassette tapes made up of sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22551382A JPS59116973A (en) | 1982-12-22 | 1982-12-22 | Slide sheet for cassette tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22551382A JPS59116973A (en) | 1982-12-22 | 1982-12-22 | Slide sheet for cassette tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59116973A true JPS59116973A (en) | 1984-07-06 |
| JPS649674B2 JPS649674B2 (en) | 1989-02-20 |
Family
ID=16830490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22551382A Granted JPS59116973A (en) | 1982-12-22 | 1982-12-22 | Slide sheet for cassette tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59116973A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110452668A (en) * | 2019-08-30 | 2019-11-15 | 哈尔滨工业大学 | A kind of transmission-type radiation refrigeration material, film, preparation method and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS508594U (en) * | 1973-05-23 | 1975-01-29 | ||
| JPS5110735U (en) * | 1974-07-10 | 1976-01-26 |
-
1982
- 1982-12-22 JP JP22551382A patent/JPS59116973A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS508594U (en) * | 1973-05-23 | 1975-01-29 | ||
| JPS5110735U (en) * | 1974-07-10 | 1976-01-26 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110452668A (en) * | 2019-08-30 | 2019-11-15 | 哈尔滨工业大学 | A kind of transmission-type radiation refrigeration material, film, preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS649674B2 (en) | 1989-02-20 |
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