JPS649674B2 - - Google Patents
Info
- Publication number
- JPS649674B2 JPS649674B2 JP22551382A JP22551382A JPS649674B2 JP S649674 B2 JPS649674 B2 JP S649674B2 JP 22551382 A JP22551382 A JP 22551382A JP 22551382 A JP22551382 A JP 22551382A JP S649674 B2 JPS649674 B2 JP S649674B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- tetrafluoroethylene
- resin layer
- weight
- resin
- 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
- 229920005989 resin Polymers 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 25
- 229920000642 polymer Polymers 0.000 claims description 13
- 229920001577 copolymer Polymers 0.000 claims description 12
- 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 9
- 239000006229 carbon black Substances 0.000 claims description 6
- 239000012778 molding material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical compound CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- -1 polyethylene Polymers 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 5
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- PYVHTIWHNXTVPF-UHFFFAOYSA-N F.F.F.F.C=C Chemical compound F.F.F.F.C=C PYVHTIWHNXTVPF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 230000000996 additive effect Effects 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
- 230000015572 biosynthetic process Effects 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
- 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
- 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
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 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
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 238000010008 shearing Methods 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)
Description
【発明の詳細な説明】
本発明はカセツ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.
一般にカセツトテープにおいて、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てい
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。
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、従つて性能、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。 Generally, 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 to make the tape run smoothly. Typical examples include conductive carbon-containing ultra-high molecular weight polyethylene sheet, conductive carbon-containing 4
Fluorinated ethylene polymer sheets, carbon-containing special paper sheets impregnated with silicone, etc. are known.
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 the requirements of performance, workability, and cost.
すなわち、導電性カーボン入り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。また加熱によつ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。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、従つて原料コ
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フツ化エチレン重合物
の欠点を改良し、特に導電性カーボン入り４フツ
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
動性に欠けるため、特殊な加工方法によらねばな
らない。すなわち、超高分子量ポリエチレン粉末
とカーボン粉末を加熱加圧成型しブロツク状とし
てから、所望の厚みのフイルムに切削しなければ
ならず、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、打抜製品にパリが生じる等の欠点があ
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、あ
るいは滑性効果のための突起を有する場合は弾力
性が劣るという欠点がある。 That is, since the conductive 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. In addition, it has a high melting point of over 320℃ 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, and therefore has the disadvantage that processing costs are high in addition to raw material costs. In addition, conductive carbon-containing ultra-high molecular weight polyethylene sheets are commercially available to improve the above-mentioned drawbacks of tetrafluoroethylene polymer sheets, and in particular to improve the flexibility and raw material costs of conductive carbon-containing tetrafluoroethylene 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, ultra-high molecular weight polyethylene powder and carbon powder must be molded under heat and pressure to form a block and then cut into a film of a desired thickness, resulting in low production efficiency and high processing costs. Furthermore, since the rigidity is extremely high, the shearing strength is extremely high, and there are disadvantages such as abrasion of the punching blade when punching into a predetermined shape and formation of cracks in the punched product. Also, special paper sheets containing carbon impregnated with silicone have the advantage of low cost, but have poor performance, especially when they have protrusions for surface smoothness, abrasion resistance, or lubricity effects. The disadvantage is that it is inferior.
本発明者は叙上の欠点を解消したカセツトテー
プ用滑りシートを開発すべく研究の結果、ポリオ
レフイン系樹脂にカーボンブラツク２〜30重量
％、４フツ化エチレン重合物もしくは４フツ化エ
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
混合した成形材料を該成形材料との接着性の良好
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ツトテープ
用滑りシートを得ることができるのみならず、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／又は４フツ化エチレン―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、低コストでカセツトテープ
用滑りシートを提供し得ることを見出だし、かか
る知見にもとづいて本発明を完成したものであ
る。 As a result of research to develop a sliding sheet for cassette tapes that eliminates the above-mentioned drawbacks, the present inventor found that a polyolefin resin containing 2 to 30% by weight of carbon black, a tetrafluoroethylene polymer or a tetrafluoroethylene-6 propylene copolymer or 4
A multilayer film is formed by coextruding a molding material containing 2 to 50% by weight of a mixture of a fluorinated ethylene polymer and a tetrafluorinated ethylene-hexafluorinated propylene copolymer together with a resin that has good adhesion to the molding material. The sheet has moderate conductivity, surface smoothness, abrasion resistance, rigidity,
Not only can a sliding sheet for a cassette tape with heat resistance and shape stability be obtained, but also the sheet material can be easily produced by coextrusion, and the sheet material can be manufactured using tetrafluoroethylene polymer and/or By coextruding a molding material layer containing a fluorinated ethylene-hexafluorinated propylene copolymer together with a resin having good adhesive properties, a thin layer can be formed, so a sliding sheet for a cassette tape can be provided at low cost. The present invention was completed based on this finding.
即ち、本考案の要旨は共押出し多層製膜され
た、ポリオレフイン系樹脂にカーボンブラツク２
〜30重量％、４フツ化エチレン重合物もしくは４
フツ化エチレン―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
セツトテープ用滑りシートである。 In other words, the gist of the present invention is that carbon black 2 is coated on polyolefin resin, which is coextruded into a multilayer film.
~30% by weight, tetrafluoroethylene polymer or 4
Ethylene fluoride-propylene hexafluoride copolymer or mixture of ethylene tetrafluoride and propylene tetrafluoride-hexafluoride copolymer 2-50
1 or 2 layers of molding materials mixed in weight %
This is a sliding sheet for a cassette tape, which is composed of a laminated sheet consisting of a conductive and slippery resin layer and a supporting resin layer that supports the layer.
以下、本発明につき詳細に説明する。 Hereinafter, the present invention will be explained in detail.
本発明のカセツトテープ用滑りシートは共押出
し多層製膜された、ポリオレフイン系樹脂にカー
ボンブラツク２〜30重量％、４フツ化エチレン重
合物もしくは４フツ化エチレン―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 a polyolefin resin, 2 to 30% by weight of carbon black, a tetrafluoroethylene polymer, a tetrafluoroethylene-hexafluoropropylene copolymer, or a polyolefin resin. One or two resin layers imparted with conductivity and lubricity, consisting of a molding material containing 2 to 50% by weight of a mixture of a fluorinated ethylene polymer and a tetrafluorinated ethylene-hexafluorinated propylene copolymer; , consisting of a laminated sheet consisting of a support 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イン系樹脂として、押出成
形用のポリエチレンで、メルトインデツクスが
0.01〜10.0ｇ／10分程度で好ましくは0.05〜5.0
ｇ／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イ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ヨン押出機
を利用して製膜できる。またポリエチレンの代り
にポリオレフイ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
ロツキング防止剤、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 made of polyethylene for extrusion molding and has a melt index.
About 0.01-10.0g/10 minutes, preferably 0.05-5.0
g/10 minutes, high-density polyethylene with a density of 0.940 or higher is preferred. This material has appropriate stiffness and impact resistance, and is superior to conventional ultra-high molecular weight polyethylene and
Compared to fluorinated ethylene polymers, it has superior processability and can be formed into a film using a T-die extruder or inflation extruder used to form general-purpose polyethylene films. 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イン系樹脂に混するカーボ
ンブラツクとしては、導電性カーボンブラツクの
粉末、すなわち粒子径が10〜60nm、吸油量が100
〜400c.c.／100ｇ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、ケツチエン
ブラツク、アセチレンブラツク、フアーネスブラ
ツク等の名称で市販されているものを適用し得
る。 Next, as the carbon black to be mixed with the polyolefin resin, conductive carbon black powder with a particle size of 10 to 60 nm and an oil absorption of 100 nm is used.
~400c.c./100g, acetylene thermal decomposition method or
It is possible to use those produced by the incomplete combustion method of heavy oil and commercially available under the names of Kettien black, acetylene black, furnace black, etc.
次に前記ポリオレフイ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フツ化エチレン
―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、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, an additive powder is used, preferably one with a particle size of 10μ or less. Use.
次にカーボンブラツクの配合割合は２〜30重量
％で、シートに成形した場合に表面抵抗値が102
〜1012Ωの範囲に入ることが好ましく、２％以下
だと1012Ω以上となり、帯電防止性能が劣り、30
％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 30% by weight, and when formed into a sheet, the surface resistance value is 10 2
It is preferable to fall within the range of ~10 12 Ω, and if it is less than 2%, it will be more than 10 12 Ω, which will result in poor antistatic performance, and 30
% or more, the fluidity of polyethylene at high temperatures decreases, making film forming processing difficult.
次に４フツ化エチレン重合物及び／又は４フツ
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 the tetrafluoroethylene polymer and/or the tetrafluoroethylene-hexafluoropropylene copolymer is preferably 2 to 50% by weight, and when formed into a sheet, the friction coefficient is preferably 0.15 or less. .
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、ポリスチレン
系樹脂、ポリアミド樹脂などを適用し得る。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。 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. still,
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 the two layers, and the material for the support resin layer/adhesive layer/conductive and slippery resin layer is It may be pressed together on three layers.
支持樹脂層は、カセツ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 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、本発明に係るカセツトテ
ープ用滑りシート１の例を示す。 1 and 2 show an example of a sliding sheet 1 for cassette tape 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 comprising 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ツトテープ用滑
りシートの例５を示す。 FIG. 3 shows Example 5 of another sliding sheet for cassette tape according to the present invention.
このシート５は支持樹脂層２と導電性且つ滑性
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。 This sheet 5 is composed of a laminated sheet 6 comprising a support resin layer 2 and conductive and slippery resin layers 3a and 3b.
以上、詳記した通り、本発明のカセツトテープ
用滑り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 described above in detail, the sliding sheet for cassette tape of the present invention has appropriate surface smoothness, abrasion resistance, rigidity, heat resistance, and shape stability, and the sheet end surface does not bend, fold, or tear during handling. This has the advantage that no curling deformation occurs due to heating.
又、本発明のカセツ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図は本発明のカセツトテープ用
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、
第３図は本発明のカセツ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……カセツ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、４，６……積層シート。
1 and 2 show a first embodiment of the sliding sheet for cassette tape of the present invention, FIG. 1 is a front view, FIG. 2 is a sectional view taken along the line A-A' shown in FIG.
FIG. 3 is a sectional view of a second embodiment of the sliding sheet for cassette tape of the present invention. 1, 5...Sliding sheet for cassette tape, 2...
... Supporting resin layer, 3, 3a, 3b... Conductive and slippery resin layer, 4, 6... Laminated sheet.
Claims (1)
樹脂にカーボンブラツク２〜30重量％、４フツ化
エチレン重合物もしくは４フツ化エチレン―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ツトテープ用滑りシ
ート。1 Co-extruded multi-layered polyolefin resin with 2 to 30% by weight of carbon black, tetrafluoroethylene polymer, tetrafluoroethylene-hexafluoropropylene copolymer, or tetrafluoroethylene polymer and 4-fluoroethylene polymer Consisting of one or two conductive and slippery resin layers made of a molding material containing 2 to 50% by weight of a mixture of ethylene fluoride and hexafluorinated propylene copolymer, and a support resin layer that supports the layers. A sliding sheet for cassette tapes made of laminated 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 JPS59116973A (en) | 1984-07-06 |
| JPS649674B2 true 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) |
Families Citing this family (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 |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59116973A (en) | 1984-07-06 |
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