JPH057793B2 - - Google Patents
Info
- Publication number
- JPH057793B2 JPH057793B2 JP59207775A JP20777584A JPH057793B2 JP H057793 B2 JPH057793 B2 JP H057793B2 JP 59207775 A JP59207775 A JP 59207775A JP 20777584 A JP20777584 A JP 20777584A JP H057793 B2 JPH057793 B2 JP H057793B2
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- web
- fibers
- component
- point component
- 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 - Lifetime
Links
Description
（産業上の利用分野）
本発明はフロツピーデイスクを収納するジヤケ
ツトに内張りしてデイスク表面のクリーニングな
どを行うライナー材の製法に関する。
（従来技術及びその問題点）
従来、フロツピーデイスクライナー材で主に使
用されているものはレーヨン繊維70〜80重量％と
ポリプロピレン繊維20〜30重量％とからなるウエ
ブをエンボスカレンダーなどにより部分的に熱圧
着することにより製造されていた。
しかし、この製法によるライナー材は熱圧着部
でポリプロピレン成分により結合されているだけ
なので、非熱圧着部においては毛羽立ちや繊維抜
けが生じ易く、耐摩耗性に問題があつた。
また熱圧着の際、ポリプロピレン繊維には融点
に近い温度がかかるため熱圧着部及びその近傍は
溶融してもろくなつているので、工程中にロール
などから受けるせん断力によつて繊維切れが生じ
易く、非熱圧着部分ではポリプロピレン繊維が溶
融して玉粒状になり、発塵の原因になるという欠
点があつた。このように、従来の製法によるライ
ナー材を使用すると毛羽立ちやカツトされた繊維
の抜けた樹脂粉の発生により磁気デイスクが損傷
したり、磁気デイスクの円滑な回転が阻害された
りするといつた多くのトラブルが生じ易かつた。
（発明の目的）
本発明は上記従来技術の欠点を解消すべくなさ
れたものであり、毛羽立ち、繊維抜け、繊維切れ
による樹脂粉の発生などの生じないライナー材の
製法を提供することを目的とする。
（発明の構成及び作用）
本発明は融点差が20℃以上ある低融点成分と高
融点成分とからなる複合繊維を５〜70重量％含む
ウエブを形成し、該ウエブを無押圧下で低融点成
分の融点以上、高融点成分の融点未満の温度で加
熱処理した後、高融点成分の軟化点以上、融点未
満の温度、線圧５〜30Kg／cmの低圧で部分的に熱
圧着することを特徴とするフロツピーデイスクラ
イナー材の製法である。
本発明に使用する複合繊維は融点差が少なくと
も20℃ある低融点成分と高融点成分とからなり、
例えばポリエチレンとポリプロピレン、低融点ポ
リエステルと高融点ポリエステルなどの組合せか
らなる芯鞘型、偏芯型、並列型などの複合繊維が
適している。
これらの複合繊維はその高融点成分の融点もし
くはそれより高い温度で溶融しないポリエステ
ル、レーヨンなどの繊維と共に混合されてウエブ
を形成する。このウエブ中には複合繊維が５〜70
重量％含まれていることが必要で、これより複合
繊維の量が少ないと本発明の目的は達成できず、
逆にこれより量が多いとクツシヨン性や柔軟性が
なくなり、クリーニング性も劣るので、ライナー
材として好ましくない。とくに好ましい複合繊維
の量は20〜40重量％である。
上記ウエブを無押圧下で低融点成分の融点以上
高融点成分の融点未満の温度で加熱処理すると、
低融点成分のみが溶融して繊維の交点で凝集す
る。このとき高融点成分は繊維形態を維持してい
る事が必要であり、加熱温度は高融点成分の融点
以上になつてはならない。例えば、ここで接着繊
維として複合繊維ではなく従来のポリプロピレン
繊維のような熱可塑性繊維を使用すると、繊維交
点での結合は達成できても繊維形態は崩れるため
強度や耐摩耗性が著しく低下する。またこの熱処
理は無押圧下で行わなければならず、押圧を加え
ると低融点成分が広がつて繊維間に樹脂膜を形成
したり、ウエブが高密度で固定されたりするため
クツシヨン性や柔軟性が著しく損われる。ここ
で、無押圧下での加熱処理というのは熱風や輻射
熱などによるウエブに殆んど押圧をかけない加熱
処理のことを指し、とくに好ましい加熱方法は熱
風が上方からウエブ内を通過して下方に抜けるよ
うに下からも吸引する方法である。この様な加熱
方法によればウエブ全体を内部まで均一に加熱す
ることができる。
この加熱処理の後、ウエブを高融点成分の軟化
点以上の温度で部分的に熱圧着する。この熱圧着
はエンボスカレンダーなどにより行われ、所定形
状の熱圧着部がウエブに適宜の間隔で分布する様
に形成される。熱圧着部の面積がウエブ面積に占
める割合合は10〜40％が好ましい。この熱圧着部
では上記加熱処理で繊維交点に凝集している低融
点成分と軟化した高融点成分とが接着に寄与し、
強い結合を得ることができる。
ただし、高融点成分はその繊維形態を大きく崩
さない方が好ましいので、熱圧着の際の温度は高
融点成分の軟化点以上であるが、融点よりも低く
する。また、線圧が５〜30Kg／cmという範囲の低
圧で圧着するため、繊維切れという問題も生じな
い。
なお、このように熱圧着の際、温度や圧力の条
件を低く設定できるのは、本発明が無押圧下での
加熱処理の後に熱圧着を行なつているため、既に
溶融し、凝集した低融点成分が高融点成分の押圧
され結合した部分を覆うように移動でき、高融点
成分による結合に加えて、低融点成分も融着する
ためであり、従来のように熱圧着のみでライナー
材を製造する場合には、温度や圧力の条件を低く
すると圧着部分のみの樹脂成分のみしか結合に寄
与できないため十分な結合力が得られなくなる。
また、従来の熱圧着のみでライナー材を製造する
場合には、高温高圧の条件で熱圧着するのでポリ
エチレン成分を含む複合繊維は、ポリエチレンの
溶融粘度が低いことからロールにウエブが巻きつ
くといつた問題を生じて使用できなかつたが本発
明では無押圧下での加熱処理でポリエチレン成分
が繊維交点に凝集した後、従来より低い熱と圧力
の条件で熱圧着するのでロールにウエブが巻きつ
かない。このように溶融粘度の低い成分を含む複
合繊維でも本発明の製造方法によれば何ら製造
上、支障なく使用できる。
本発明の製法により得られるライナー材は非熱
圧着部が嵩高な状態を保ちながら、繊維間が結合
されているので、良好なクツシヨン性、柔軟性、
クリーニング性を示すと共に毛羽立ちや繊維抜け
がなく耐摩耗性に優れている。一方、熱圧着部で
は凝集した低融点成分と軟化した高融点成分が結
合に寄与しているので、強固な結合が得られる。
また、本発明ではこのときにかかる熱や圧力の条
件を従来より低い条件に設定できるので、繊維切
れなどによる樹脂粉の発生も生じない。
（実施例）
実施例
融点135℃のポリエチレン成分と融点170℃のポ
リプロピレン成分とからなる複合繊維30重量％と
レーヨン繊維70重量％とを混合して目付35ｇ／m2
のウエブを形成する。次いでこのウエブをサクシ
ヨンバンド式熱風通気加熱装置により135℃の温
度で加熱処理する。この後、温度155℃、線圧10
Kg／cmの条件でエンボスカレンダーにより熱圧着
し、熱圧着部の面積がウエブ面積に占める割合が
28％のライナー材を形成した。
このライナー材はクツシヨン性、柔軟性、クリ
ーニング性が良好で毛羽立ち、繊維抜け、樹脂粉
の発生もなかつた。はた、引張強度も6.0Kg／５
cm巾と強かつた。さらに、ライナー材を評価する
手段として回転トルクを測定したところ下表のよ
うに各荷重において小さな値を示し、使用時に円
滑な回転が得られることを示した。
比較例
ポリプロピレン繊維30重量％とレーヨン繊維70
重量％とを混合して目付35ｇ／m2のウエブを形成
する。次いでこのウエブを温度175℃、線圧50
Kg／cmの条件でエンボスカレンダーにより熱圧着
し、熱圧着部の面積がウエブ面積に占める割合が
28％のライナー材を形成した。
このライナー材は繊維の損傷が著しい為に毛羽
立ちや樹脂粉の発生が生じ易く、引張り強度も
1.8Kg／５cm巾と弱かつた。また回転トルクも実
施例に比べてはるかに高く、回転性も劣つてい
た。
(Industrial Application Field) The present invention relates to a method for manufacturing a liner material that is used to line a jacket for storing a floppy disk and to clean the surface of the disk. (Prior art and its problems) Conventionally, the material mainly used for floppy disc liner materials is to partially process a web consisting of 70 to 80% by weight of rayon fibers and 20 to 30% by weight of polypropylene fibers using an embossing calender or the like. It was manufactured by thermocompression bonding. However, since the liner material manufactured by this method is only bonded by the polypropylene component in the thermocompression bonded area, fuzzing and fibers are likely to occur in the non-thermocompression bonded area, resulting in problems in abrasion resistance. In addition, during thermocompression bonding, polypropylene fibers are subjected to temperatures close to their melting point, so the thermocompression bonded area and its surroundings melt and become brittle, so fibers are likely to break due to the shearing force received from rolls during the process. However, in the non-thermocompression bonded area, the polypropylene fibers melted into beads, which caused dust generation. In this way, when liner materials manufactured using conventional methods are used, there are many problems such as damage to the magnetic disk due to fuzz and the generation of resin powder from cut fibers, and the smooth rotation of the magnetic disk. was likely to occur. (Object of the Invention) The present invention has been made in order to eliminate the drawbacks of the above-mentioned prior art, and its purpose is to provide a method for producing a liner material that does not cause fuzzing, fiber shedding, generation of resin powder due to fiber breakage, etc. do. (Structure and operation of the invention) The present invention forms a web containing 5 to 70% by weight of composite fibers consisting of a low melting point component and a high melting point component with a melting point difference of 20°C or more, After heat treatment at a temperature above the melting point of the component and below the melting point of the high melting point component, partial thermocompression bonding is performed at a temperature above the softening point of the high melting point component and below the melting point, and at a low linear pressure of 5 to 30 kg/cm. This is the manufacturing method of the floppy disk liner material. The composite fiber used in the present invention consists of a low melting point component and a high melting point component with a melting point difference of at least 20°C,
For example, composite fibers such as core-sheath type, eccentric type, and parallel type made of combinations of polyethylene and polypropylene, low melting point polyester and high melting point polyester, etc. are suitable. These composite fibers are mixed with fibers such as polyester, rayon, etc. that do not melt at or above the melting point of the high melting point component to form a web. There are 5 to 70 composite fibers in this web.
If the amount of composite fiber is less than this, the purpose of the present invention cannot be achieved.
On the other hand, if the amount is larger than this, the cushioning properties and flexibility will be lost, and the cleaning properties will also be poor, making it undesirable as a liner material. A particularly preferred amount of composite fibers is 20-40% by weight. When the above web is heat-treated at a temperature higher than the melting point of the low melting point component and lower than the melting point of the high melting point component without pressing,
Only the low melting point components melt and aggregate at the intersections of the fibers. At this time, the high melting point component must maintain its fiber form, and the heating temperature must not exceed the melting point of the high melting point component. For example, if conventional thermoplastic fibers such as polypropylene fibers are used as adhesive fibers instead of composite fibers, although bonding at fiber intersections can be achieved, the fiber morphology collapses, resulting in a significant decrease in strength and abrasion resistance. In addition, this heat treatment must be performed without pressure; when pressure is applied, the low melting point components spread, forming a resin film between the fibers and fixing the web at a high density, resulting in poor cushioning properties and flexibility. is significantly impaired. Here, heat treatment without pressure refers to heat treatment using hot air or radiant heat that does not apply much pressure to the web.A particularly preferred heating method is to heat the web from above by passing through the web from below. This is a method of suctioning from below so that it can escape. According to such a heating method, the entire web can be uniformly heated to the inside. After this heat treatment, the web is partially thermocompressed at a temperature higher than the softening point of the high melting point component. This thermocompression bonding is performed using an embossing calendar or the like, and thermocompression bonding portions having a predetermined shape are formed on the web so as to be distributed at appropriate intervals. The ratio of the area of the thermocompression bonded portion to the web area is preferably 10 to 40%. In this thermocompression bonding part, the low melting point components aggregated at the fiber intersection points and the softened high melting point components due to the heat treatment contribute to adhesion.
A strong bond can be obtained. However, since it is preferable that the fiber form of the high melting point component not be significantly disturbed, the temperature during thermocompression bonding is set to be higher than the softening point of the high melting point component, but lower than the melting point. Furthermore, since the bonding is performed at a low linear pressure in the range of 5 to 30 kg/cm, the problem of fiber breakage does not occur. The reason why the temperature and pressure conditions can be set low during thermocompression bonding is that the present invention performs thermocompression bonding after heat treatment without any pressure, which removes the already melted and agglomerated low temperature and pressure conditions. This is because the melting point component can move to cover the pressed and bonded part of the high melting point component, and in addition to the bonding by the high melting point component, the low melting point component also fuses. In manufacturing, if the temperature and pressure conditions are lowered, only the resin component in the crimped portion can contribute to the bonding, making it impossible to obtain sufficient bonding force.
In addition, when manufacturing liner materials using only conventional thermocompression bonding, since the thermocompression bonding is carried out under high temperature and high pressure conditions, composite fibers containing polyethylene have a low melt viscosity. However, in the present invention, after the polyethylene component aggregates at the fiber intersection points through heat treatment without pressure, thermocompression bonding is performed under conditions of lower heat and pressure than conventional methods, so the web is not wound around the roll. do not have. According to the production method of the present invention, even composite fibers containing components with low melt viscosity can be used without any problems in production. The liner material obtained by the manufacturing method of the present invention has good cushioning properties, flexibility, and
It exhibits good cleaning properties and has excellent abrasion resistance without fluffing or shedding of fibers. On the other hand, in the thermocompression bonded part, the agglomerated low melting point component and the softened high melting point component contribute to the bond, so a strong bond can be obtained.
Furthermore, in the present invention, the heat and pressure conditions applied at this time can be set to lower conditions than in the past, so resin powder does not occur due to fiber breakage or the like. (Example) Example 30% by weight of composite fibers consisting of a polyethylene component with a melting point of 135°C and a polypropylene component with a melting point of 170°C and 70% by weight of rayon fiber were mixed to have a basis weight of 35g/m 2
form a web. Next, this web is heat-treated at a temperature of 135° C. using a suction band type hot air ventilation heating device. After this, the temperature is 155℃, the linear pressure is 10
Heat-compression bonding is performed using an embossing calender under the conditions of kg/cm, and the area of the thermo-compression bonded portion accounts for the proportion of the web area.
Formed 28% liner material. This liner material had good cushioning properties, flexibility, and cleanability, and did not generate fuzz, fiber shedding, or resin powder. Also, the tensile strength is 6.0Kg/5
cm wide and strong. Furthermore, when the rotational torque was measured as a means of evaluating the liner material, it showed small values at each load as shown in the table below, indicating that smooth rotation could be obtained during use. Comparative example: 30% polypropylene fiber and 70% rayon fiber
% by weight to form a web with a basis weight of 35 g/m 2 . This web was then heated to a temperature of 175℃ and a linear pressure of 50℃.
Heat-compression bonding is performed using an embossing calender under the conditions of kg/cm, and the area of the thermo-compression bonded portion accounts for the proportion of the web area.
Formed 28% liner material. This liner material is prone to fluffing and resin powder due to significant fiber damage, and its tensile strength is also low.
It was weak at 1.8Kg/5cm width. Moreover, the rotational torque was much higher than that of the example, and the rotatability was also inferior.
【表】
なお、デイスクとライナー材との間のトルクは
HEIDON−14TT型 トルク式摩擦抵抗測定機
（新東科学株式会社製）を使用して測定した値で
ある。
（発明の効果）
以上述べたように本発明によればクツシヨン性
や柔軟性を損わずに非熱圧着部の繊維間を結合す
ることができるので、毛羽立ちや繊維抜けのない
耐摩耗性の優れたライナー材を得ることができ
る。
また本発明では無押圧下での加熱処理の後、熱
圧着しているので、熱圧着の際の温度や圧力の条
件を従来より低くすることができる。繊維切れな
ども起こりにくい。更には、無押圧下での加熱処
理により繊維交点に凝集した低融点成分を熱圧着
により効率よく利用し、かつ高融点成分の軟化圧
着も利用できるので強固に結合したライナー材が
得られる。
このように、本発明によれば毛羽や繊維や樹脂
粉により磁気デイスクを傷つけたり、磁気デイス
クの円滑な回転を妨げたりすることがなく、しか
も長期の使用に際してもトラブルの発生が殆んど
ないライナー材を効率よく製造できる。[Table] The torque between the disc and liner material is
This is a value measured using a HEIDON-14TT torque type friction resistance measuring machine (manufactured by Shinto Kagaku Co., Ltd.). (Effects of the Invention) As described above, according to the present invention, it is possible to bond the fibers in the non-thermo-bonded portion without impairing the cushioning properties or flexibility, thereby achieving wear-resistant properties without fuzzing or fiber shedding. An excellent liner material can be obtained. Further, in the present invention, thermocompression bonding is performed after heat treatment without pressure, so the temperature and pressure conditions during thermocompression bonding can be lower than conventional conditions. Fiber breakage is also less likely to occur. Furthermore, the low melting point components aggregated at the fiber intersection points through heat treatment without pressure can be efficiently utilized by thermocompression bonding, and the softening compression bonding of the high melting point components can also be used, so a strongly bonded liner material can be obtained. As described above, according to the present invention, the magnetic disk is not damaged by fuzz, fibers, or resin powder, and the smooth rotation of the magnetic disk is not hindered, and moreover, there is almost no trouble during long-term use. Liner material can be manufactured efficiently.
Claims (1)
分とからなる複合繊維を５〜70重量％含むウエブ
を形成し、該ウエブを無押圧下で低融点成分の融
点以上、高融点成分の融点未満の温度で加熱処理
した後、高融点成分の軟化点以上、融点未満の温
度、線圧５〜30Kg／cmの低圧で部分的に熱圧着す
ることを特徴とするフロツピーデイスクライナー
材の製法。1 Form a web containing 5 to 70% by weight of composite fibers consisting of a low-melting point component and a high-melting point component with a melting point difference of 20°C or more, and then heat the web without pressing at a temperature higher than the melting point of the low-melting point component and of the high-melting point component. A floppy disk liner material that is heat-treated at a temperature below the melting point and then partially thermocompressed at a temperature above the softening point of the high melting point component and below the melting point and at a low linear pressure of 5 to 30 kg/cm. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20777584A JPS6185683A (en) | 1984-10-02 | 1984-10-02 | Manufacture of floppy disk liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20777584A JPS6185683A (en) | 1984-10-02 | 1984-10-02 | Manufacture of floppy disk liner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6185683A JPS6185683A (en) | 1986-05-01 |
| JPH057793B2 true JPH057793B2 (en) | 1993-01-29 |
Family
ID=16545313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20777584A Granted JPS6185683A (en) | 1984-10-02 | 1984-10-02 | Manufacture of floppy disk liner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6185683A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2727242B2 (en) * | 1989-10-18 | 1998-03-11 | 三菱レイヨン株式会社 | Floppy disk jacket liner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6112620Y2 (en) * | 1979-05-28 | 1986-04-19 |
-
1984
- 1984-10-02 JP JP20777584A patent/JPS6185683A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6185683A (en) | 1986-05-01 |
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