JPS6098580A - Storage jacket of magnetic disc - Google Patents

Storage jacket of magnetic disc

Info

Publication number
JPS6098580A
JPS6098580A JP20659283A JP20659283A JPS6098580A JP S6098580 A JPS6098580 A JP S6098580A JP 20659283 A JP20659283 A JP 20659283A JP 20659283 A JP20659283 A JP 20659283A JP S6098580 A JPS6098580 A JP S6098580A
Authority
JP
Japan
Prior art keywords
sheet
vinyl chloride
jacket
half body
parts
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
Application number
JP20659283A
Other languages
Japanese (ja)
Other versions
JPH0411948B2 (en
Inventor
Takehide Miyazaki
宮崎 毅英
Osamu Kakishita
修 垣下
Tokuji Araki
荒木 徳治
Tokiro Kitagawa
北河 時郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Plastics Inc
Original Assignee
Mitsubishi Plastics Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP20659283A priority Critical patent/JPS6098580A/en
Publication of JPS6098580A publication Critical patent/JPS6098580A/en
Publication of JPH0411948B2 publication Critical patent/JPH0411948B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To improve the external appearance of embossment, the external appearance of folding, heat sealing property, shock resistance, and heat resistance by folding a sheet consisting of a specific quantity of vinyl chloride polymer or the like as a main component to form the titled storage jacket. CONSTITUTION:As the components of the sheet, (a) 50-90pts.wt. Cl-PVC, (b) 50-10pts.wt. PVC (homopolymer), (c) 3-10pts.wt. vinyl chloride copolymer containing 90-99.5wt% vinyl chloride, and (d) 1-25pts.wt. MBS resin are used (provided that the total of (a) and (b) is 100pts.wt.). The magnetic disc jacket sheet 1 is a rectangle obtained by connecting approximately square half bodies 11, 12 and welding flaps 2 are formed on the periphery of one half body 12. Nonwoven cloth 3 is adhered almost to the whole surface of the sheet 1 and prescribed holes such as central windows 4 and head windows 5 are symmetrically formed so as to be penetrated into the nonwoven cloth 3. To produce the magnetic disc jacket sheet 1, the prescribed holes are punched through the nonwoven cloth- adhered sheet, the sheet is folded about the center line to superpose the half body 11 to the half body 12 and the right and left flaps 2 are folded on the half body 12 and seeled with heat.

Description

【発明の詳細な説明】 本発明は、磁気記録ディスクを外部から回転駆動及び記
録再生可能に収納する型式のディスクジャケットに関し
、特にジャケットの耐熱性向上を目的とするものである
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a type of disk jacket that houses a magnetic recording disk so that it can be rotated and read/written from the outside, and particularly aims at improving the heat resistance of the jacket.

従来この種のジャケットは、塩化ビニル−酢酸ビニル共
重合樹脂のシートからなり、これにエンボス2施して艶
消しノートとした閣、ネオ、・、布貼合せ、裁断、折曲
げ等の工程’tfて袋状に形成されている。
Conventionally, this type of jacket is made of a sheet of vinyl chloride-vinyl acetate copolymer resin, which is embossed twice to make a matte note. It is shaped like a bag.

ところが従来のジャケットは、ジャケット内部でディス
クが回転することによる発熱や、環境温度の上昇により
、そり、たわみ等の穴形を生じるおそれがあるため、更
に耐熱(9ユの高いジャケットが要望されている。
However, with conventional jackets, there is a risk of warping, bending, and other hole shapes due to heat generated by the rotation of the disk inside the jacket and increases in environmental temperature. There is.

一般に塩化ビニル系樹脂製品に耐熱性を伺与するには、
塩化ビニル樹脂(以下PVCと1lIl’j記する)f
f:後塩素化して、塩素化塩化ビニル樹脂(以下ct 
−p v cと略記する)として用いるのが普通である
Generally, in order to impart heat resistance to vinyl chloride resin products,
Vinyl chloride resin (hereinafter referred to as PVC) f
f: After chlorination, chlorinated vinyl chloride resin (hereinafter ct
- p v c).

ところがct−pVcl′i、面1詑・ノi (’l 
&、1. +j’:1いかりm度が低く、またシート製
膜性やJlli々の3次加工性に劣っている。
However, ct-pVcl'i, surface 1詑・ノi ('l
&, 1. +j': 1 degree is low, and sheet film formability and Jlli tertiary processability are poor.

一方ジャケツトには、均一で充分艶消しされたエンボス
外観、正確な折曲は形状、美加で高強度のヒートシール
、機械的強度等の種々の特性、品質が要求されるため、
単にpvcをCt−PVCに換えるだけではこれらの特
性を満たすジャケットは得難い。
On the other hand, jackets are required to have various characteristics and qualities such as uniform and sufficiently matte embossed appearance, accurate bending shape, beautiful and high strength heat sealing, and mechanical strength.
It is difficult to obtain a jacket that satisfies these characteristics simply by replacing PVC with Ct-PVC.

本発明者等は、耐熱性に優れ、さらにジャケットに要求
される種々の品質を満足させたジャケットを得るため鋭
意検討の結果、本発明を完成した。
The present inventors completed the present invention as a result of intensive studies to obtain a jacket that has excellent heat resistance and also satisfies various qualities required of a jacket.

即ち本発明は、下記(a)〜(d)を主成分とするシー
トによりジャケットを形成したことを特徴とするもので
ある。
That is, the present invention is characterized in that the jacket is formed from a sheet containing the following (a) to (d) as main components.

(a) C1−pvc !;0〜90重量部(b)pv
c(単独重合体)so〜io重量部(c) 塩化ビニル
を90〜 ワタ、S重ガtチ含有する 塩化ビニル共重合体 3〜70重量部 (a) MBs樹脂 7〜23重量部 ここで(a)と(b) 、!:の合計は100MfjA
1部とする。
(a) C1-pvc! ;0 to 90 parts by weight (b) pv
c (homopolymer) so to io parts by weight (c) Vinyl chloride copolymer containing 90 to 90% of vinyl chloride, 3 to 70 parts by weight (a) MBs resin 7 to 23 parts by weight (a) and (b),! : The total is 100MfjA
1 copy.

以下本発明の詳細な説明する。The present invention will be explained in detail below.

第1図は磁気ディスクジャケット用シートの平面図であ
る。シート/は、はぼ正方形の半休//、7.2が連な
った長方形であり、一方の半体12の周囲には溶着フラ
ップコが形成されている。シート/のほぼ全面には、不
織布3が貼着され、このシート/と不織布3を貫通して
、セントラルウイントーク、ヘッドウィンドーS等の所
定の孔が左右対称に設けられている。
FIG. 1 is a plan view of a magnetic disk jacket sheet. The sheet / is a rectangular shape in which half-square halves // and 7.2 are connected, and a welded flap is formed around one half 12. A nonwoven fabric 3 is adhered to almost the entire surface of the sheet/, and predetermined holes such as a central window talk and a head window S are provided symmetrically through the sheet/ and the nonwoven fabric 3.

本発明は、このシート/を以下に説明する(a)〜(d
)成分で構成したことを特徴としている。なお以下の説
明で「部J及び「%」は、各々1重量部」及び「重量%
」をあられす。
In the present invention, this sheet/is explained below (a) to (d).
) is characterized by being composed of ingredients. In addition, in the following explanation, "part J" and "%" each refer to "1 part by weight" and "% by weight".
” Hail!

シート/の主体となる(a)Fi、、塩素含有率60〜
70%、好ましくは62〜66%0ct−pvcであっ
て、これにより/−ト(ジャケット)に耐熱性tn与す
る。ct −p v cの前駆体であるPvCとしては
、平均重合度(百)がSOO〜1ioo、特に6θ0〜
goo程度のものが【f適であり、またこれは少量の他
成分を含む共重合体であってもよい。
(a) Fi, which is the main component of the sheet, chlorine content 60 ~
70%, preferably 62-66% 0ct-PVC, which gives the jacket a heat resistance tn. PvC, which is a precursor of ct-pvc, has an average degree of polymerization (100) of SOO to 1ioo, especially 6θ0 to
Suitable is a polymer of about 50% or less, and it may also be a copolymer containing a small amount of other components.

この(a)成分は、耐熱性は極めて良いが前述の通り種
々の欠点を有しているので、次の(b)〜(、i)成分
を加えて、耐熱性をできるだけ損わずに各移特性を改良
しである。
Although this component (a) has extremely good heat resistance, it has various drawbacks as mentioned above, so the following components (b) to (i) are added to each component without impairing the heat resistance as much as possible. This improves the transfer characteristics.

まず(+、、)成分は、塩化ビニル単独重合体であって
、これを加えることにょシ、シートのエンボス外観、ジ
ャケットの折曲げ形状及びヒートシール性が改良される
First, the (+, , ) component is a vinyl chloride homopolymer, and its addition improves the embossed appearance of the sheet, the folded shape of the jacket, and the heat sealability.

(b)成分としIFJ:P !;00〜/100、特に
xoo−goo程度の比較的低重合度のものが好ましい
(b) Ingredient IFJ:P! ;00 to /100, particularly those with a relatively low degree of polymerization of the order of xoo-goo are preferred.

(C)成分は、9θ〜99.5%の塩化ビニルと0.3
〜10%の他成分からなる塩化ビニル共重合体であって
、他成分としてはエチレン、プロピレン、酢酸ビニル、
エチレン−酢酸ビニル、アルキルビニルエーテル、等が
挙ケラレる。
Component (C) is 9θ~99.5% vinyl chloride and 0.3
A vinyl chloride copolymer consisting of ~10% of other components, including ethylene, propylene, vinyl acetate,
Examples include ethylene-vinyl acetate, alkyl vinyl ether, and the like.

この(C)成分は、ノート外観を改良する。即ちC1−
PVCi主体とする拐料金例えばカレンダー法によりノ
ートに製膜すると、フローマークと称する木目模様状の
ムラがノートに生じるが、この(C)成分を加えること
によりこの欠点が解消される。′!1′たシートを柔軟
にして、ヒート/−ル性や折曲は外観を良くする効果も
ある。
This component (C) improves the appearance of the notebook. That is, C1-
When a PVCi-based film is formed on a notebook by, for example, a calendaring method, unevenness in the shape of a wood grain pattern called flow marks occurs on the notebook, but this drawback can be eliminated by adding component (C). ′! 1' It also has the effect of making the sheet flexible, improving its heat/rollability and bending, and improving its appearance.

(d)成分のM B S樹脂は、7−トに耐衝撃性を付
与するもので、例えばメチルメタクリレートio−″−
qO%、ブタジェン/θ〜tO%、スチレン、2O〜6
0%のものが使用できる。
The MBS resin of component (d) is one that imparts impact resistance to 7-t, for example, methyl methacrylate io-''-
qO%, butadiene/θ~tO%, styrene, 2O~6
0% can be used.

各成分の混合比率につき説明すると、(a)と(b)の
比率は、両者の合計量を100部として、(a)を50
〜90部、(b)を5o−io部とする。(a)が90
部を超えると、シートが硬くなって、良ff ナエンボ
ス外観、折曲は形状、ヒート/−ルが得られない。また
(a)が50部よりも少いと、耐熱性向上効果がさほど
でなくなる。
To explain the mixing ratio of each component, the ratio of (a) and (b) is 50 parts of (a) when the total amount of both is 100 parts.
~90 parts, (b) is 5o-io parts. (a) is 90
If it exceeds 100 mm, the sheet becomes hard and a good embossed appearance, bending shape, and heat/rue cannot be obtained. Moreover, if the amount of (a) is less than 50 parts, the effect of improving heat resistance will not be so great.

耐熱性と他の特性とを併せ考えると、(a)及び(b)
の平均塩素台−111が6/〜65%となるように、c
t−pvcの塩素台お及び(a)と(l〕)とのil+
−合比一十′をil!整するのが好ましい。
Considering heat resistance and other properties together, (a) and (b)
c so that the average chlorine stand-111 of is 6/~65%.
Chlorine stand of t-pvc and il+ of (a) and (l)
-Il 10'! Preferably.

(C)成分わt 、 (a)+(b) / 00 II
に対し、3〜lO部添加する。3部未満では7−ト外観
が十分改良されず、また70部を超えると、/−トのカ
レンダ−製膜時に祠料がカレンダーロールに粘着する傾
向を生じて好ましくなく、またシートの耐熱性を低下さ
せる。
(C) Component wt, (a) + (b) / 00 II
Add 3 to 10 parts to the amount. If it is less than 3 parts, the appearance of the sheet will not be sufficiently improved, and if it exceeds 70 parts, the abrasive will tend to stick to the calender roll during calender film formation, which is undesirable, and the heat resistance of the sheet will be deteriorated. decrease.

(d)成分は、(a)+(b) / 00部に対しテ/
〜、25部、特に5〜75部が適当であシ、7部未満で
はジャケットの衝撃強度が十分向上せず、25部を超え
ても衝撃強度aあまシ向上せず、かえってノートの耐熱
性が低下する。
(d) Ingredients are (a) + (b) / 00 parts
~25 parts, especially 5 to 75 parts, is appropriate; if it is less than 7 parts, the impact strength of the jacket will not be sufficiently improved, and if it exceeds 25 parts, the impact strength will not improve much, and the heat resistance of the notebook will be adversely affected. decreases.

本発明ジャケット用の7−トは、前記(a)〜(d)成
分に、更に各種添加剤、例えば有機錫系、鉛系等の熱安
定剤、ワックス類、有機金属塩等の滑剤を加え、また通
常はカーボンブラック顔料を添加してカレンダー法等に
より製膜して得られる。
The 7-t for jackets of the present invention further includes various additives such as organic tin-based and lead-based heat stabilizers, waxes, and organic metal salts and other lubricants in addition to the above-mentioned components (a) to (d). Also, it is usually obtained by adding a carbon black pigment and forming a film by a calendering method or the like.

次に実施例により、本発明を具体的に説明するとともに
その効果を明らかにする。
Next, the present invention will be specifically explained and its effects will be clarified by way of Examples.

〔実施例〕〔Example〕

第7表に示す組成物に、有機錫系安定剤JJ部、滑剤o
3部及びカーボンブラック顔料を添加して、カレンダー
法により、厚さ2soμのシートを製膜した。
In the composition shown in Table 7, organotin stabilizer JJ part, lubricant o
3 parts and a carbon black pigment were added, and a sheet with a thickness of 2 soμ was formed by a calendering method.

このシートに、エンボスロールにより各シートについて
の最適温度で艶消しくシボ(=Jけ)を行い、これを第
1図に示す外形に裁断して、その−面に不織布を融着し
た。
This sheet was mattly textured using an embossing roll at the optimum temperature for each sheet, cut into the shape shown in FIG. 1, and a nonwoven fabric was fused to the negative side of the sheet.

次いで、この不絨布貼着シートに、第1図に示すような
所定の孔を打抜き、中心線から半折して半体/コ上に半
体//を卸ねた後、左右の溶着フラップコ、−を半休/
コ上に折曲け、ヒートシールした。
Next, predetermined holes are punched out in this non-woven adhesive sheet as shown in Figure 1, and after folding in half from the center line and lowering the half body onto the half body, the left and right welding flaps are attached. , - half-off /
Fold it over and heat seal it.

かくして得られたジャケットについて、次の項目を評価
した。その結果を第7表に併記する。
The following items were evaluated for the thus obtained jacket. The results are also listed in Table 7.

(1) シート外観 シートの外観を観摂し、フローマークの有無をみた。(1) Seat appearance The appearance of the sheet was observed to see if there were any flow marks.

○・・・・・・フローマークなし △・・・・・・フローマークか少しある×・・・・・・
フローマークが多発 (2) エンボス外観 次の基準で評価した。
○・・・No flow marks △・・・There are some flow marks ×・・・・・・
Frequent flow marks (2) Embossed appearance was evaluated based on the following criteria.

0・・・エンホ′スの転写が良好で、十分艶消しされて
いる。
0: Enhancement transfer is good and the image is sufficiently matte.

Δ ・・転写不十分の部分があり、光沢面が残る。Δ: There are some areas where the transfer is insufficient and a glossy surface remains.

×・・・エンボスか転写されず、艶消しされない。×... Embossed or transferred, not matted.

に3ノ 折り曲げ外観 α(/図eζ7JZず形状のノートの半休12を押え板
で固定し、その押え板上に半休//′ff:常温で折曲
け、次いで左右のフラップ−1,2,ヲ半1本//1−
に?に温で折曲りでジャケットとし、各折り曲り都の外
tg+!を細紐した。
3 No. Folded appearance α (/Figure eζ7JZ) Fix half-fold 12 of the notebook with a presser plate, half-fold on the presser plate //'ff: Bend it at room temperature, then fold the left and right flaps -1, 2, wohan 1//1-
To? Warm and fold it into a jacket, and each fold outside the city TG+! I tied it with a thin string.

○・・・折り曲は部の形状が、押え板形状に忠実で外観
良好。
○...The shape of the bent portion is faithful to the shape of the presser plate and has a good appearance.

△・・・・」)1曲けhl、かやや白化し、またフラッ
フ”λかやや」三方に戻る。
△...'') 1 song, hl, slightly whitening, and then fluff ``λkayaya'' returns to Mikata.

X ・折曲は片11の白化、及び戻りか著しい。X: The bending shows significant whitening and curling of piece 11.

(41ヒート/−ル性 半休//上に折1ねたフラングコ1.2を、定1t41
隔型ンール機を用いて、小判形のスポット7−ルにより
シール時間3秒でシール温度を変更して半休//に溶着
した。そして7一ル部に、1&8/ Q y(p、先端
角度/lI0〕<サヒを押込んで、実用上必要な2 K
9以トの7一ル強度が得られる最低ソール温度をもとめ
た。
(41 heats / half a break // Fold 1.2 Frangco on top, constant 1t41
Welding was carried out using an oval-shaped spot 7-hole with a sealing time of 3 seconds and changing the sealing temperature for half a second using a spacer-type sealing machine. Then, push the 1 & 8/ Q y (p, tip angle/lI0) < Sahi into the 7-1 part to obtain the practically necessary 2 K.
The lowest sole temperature at which a 71 strength of 9 or higher was obtained was determined.

L51 11ii1衝撃性 10枚のジャケットを、ヘッドウィンドー左に近い辺が
1方となるようにして、116さ/?nから垂直に落下
させ、破損する枚数をもとめた。
L51 11ii1 impact 10 jackets, with the side closest to the left side of the head window on one side, 116cm/? The number of sheets damaged was determined by dropping the sheets vertically from n.

(Gl耐熱性 ジャケット’tオーブン中でAOC,/日間加熱し、ジ
ャケットの変形をみる。
(Gl heat-resistant jacket't heated in an oven for AOC, /day to observe the deformation of the jacket.

○・・・・・変形全くなし へ・・・・・わずかにふくらみ、そり等の変形あり ×・・・・・−ふくらみ、そり等の変形大*/)pりθ
O1塩素含量乙Sチ *2) P2O3,単独重合体 *、、?) P2O3,エチレン含昂g%の塩化ビニル
−エチレン共i1j合体 第1表に示す結果から明らかな辿り、本発明ジャケラ)
 (A<’及びL)は、各種特性がいずれも優れている
○...No deformation at all...Slight bulge, warpage, etc. deformation ×...--Large deformation such as bulge, warp, etc. */) p θ
O1 Chlorine content B S *2) P2O3, homopolymer *,,? ) P2O3, vinyl chloride-ethylene co-i1j combination with ethylene content g%.
(A<' and L) are excellent in various properties.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、磁気ディスク収納ジャケット用ノートの平m
1図。
Figure 1 shows the flat size of a notebook for a magnetic disk storage jacket.
Figure 1.

Claims (1)

【特許請求の範囲】 下記(a)〜(d) k主成分とするシートを折曲り゛
て形成したことを特徴とする磁気ディスク収納ジャケッ
ト。 (a) 塩素化塩化ビニル樹脂 go−qo重1:°部
(b) 塩化ビニル単独重合体 50〜10重1部(C
) 塩化ビニルを90〜 99、S重量係含鳴する 塩化ビニル共重合体 3〜10重知部 (d) MBs樹脂 7〜23重量部 (ここで(a)と(b)との合削敏は100重量部とす
る。)
[Scope of Claims] A magnetic disk storage jacket characterized by being formed by folding a sheet containing the following main components (a) to (d). (a) Chlorinated vinyl chloride resin go-qo weight 1:° part (b) Vinyl chloride homopolymer 50-10 weight 1 part (C
) Vinyl chloride copolymer containing 90 to 99 parts by weight of vinyl chloride, 3 to 10 parts by weight (d) MBs resin 7 to 23 parts by weight (here, the combination of (a) and (b) is 100 parts by weight.)
JP20659283A 1983-11-02 1983-11-02 Storage jacket of magnetic disc Granted JPS6098580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20659283A JPS6098580A (en) 1983-11-02 1983-11-02 Storage jacket of magnetic disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20659283A JPS6098580A (en) 1983-11-02 1983-11-02 Storage jacket of magnetic disc

Publications (2)

Publication Number Publication Date
JPS6098580A true JPS6098580A (en) 1985-06-01
JPH0411948B2 JPH0411948B2 (en) 1992-03-03

Family

ID=16525953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20659283A Granted JPS6098580A (en) 1983-11-02 1983-11-02 Storage jacket of magnetic disc

Country Status (1)

Country Link
JP (1) JPS6098580A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6216283A (en) * 1985-07-15 1987-01-24 Teijin Memorex Kk Jacket for floppy disk
US5149048A (en) * 1990-12-19 1992-09-22 Integral Peripherals Shock absorbent mounting arrangement for disk drive or other component
US5161770A (en) * 1990-12-19 1992-11-10 Integral Peripherals, Inc. Shock absorbent mounting arrangement for disk drive or other component
US5379171A (en) * 1991-09-25 1995-01-03 Integral Peripherals Microminiature hard disk drive
US5426562A (en) * 1990-12-19 1995-06-20 Integral Peripherals Disk drive enclosed by shock absorbent jacket and mounted in electronic instrument

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6216283A (en) * 1985-07-15 1987-01-24 Teijin Memorex Kk Jacket for floppy disk
US5149048A (en) * 1990-12-19 1992-09-22 Integral Peripherals Shock absorbent mounting arrangement for disk drive or other component
US5161770A (en) * 1990-12-19 1992-11-10 Integral Peripherals, Inc. Shock absorbent mounting arrangement for disk drive or other component
US5426562A (en) * 1990-12-19 1995-06-20 Integral Peripherals Disk drive enclosed by shock absorbent jacket and mounted in electronic instrument
US5448433A (en) * 1990-12-19 1995-09-05 Integral Peripherals Disk drive information storage device with baseplate and cover having overlapping edge portions to provide protection from electromagnetic interference
US5379171A (en) * 1991-09-25 1995-01-03 Integral Peripherals Microminiature hard disk drive

Also Published As

Publication number Publication date
JPH0411948B2 (en) 1992-03-03

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