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公开(公告)号：EP0123258B1
公开(公告)日：1988-01-20
申请号：EP84104340.9
申请日：1984-04-17
CPC分类号： G11B5/825 , G11B5/7315 , Y10S428/90 , Y10S428/91 , Y10T428/24372 , Y10T428/24612 , Y10T428/24942 , Y10T428/24975 , Y10T428/26 , Y10T428/264 , Y10T428/265 , Y10T428/31786 , Y10T428/31797 , Y10T428/31938
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公开(公告)号：EP0123258A3
公开(公告)日：1985-09-18
申请号：EP84104340
申请日：1984-04-17
CPC分类号： G11B5/825 , G11B5/7315 , Y10S428/90 , Y10S428/91 , Y10T428/24372 , Y10T428/24612 , Y10T428/24942 , Y10T428/24975 , Y10T428/26 , Y10T428/264 , Y10T428/265 , Y10T428/31786 , Y10T428/31797 , Y10T428/31938
摘要： @ A magnetic recording disk which comprises (1) a three-layered laminate consisting of a core layer of a biaxially oriented polyolefinfilm which has a birefringence of not more than 0.01 and an amorphous-region orientation coefficient of not more than 0.2 and two outer layers of a biaxially oriented polyester film adhered to said core layer, and (2) a magnetic layer formed on at least one side of the laminate. The magnetic recording disk of the invention undergoes only slight dimensional changes with variations in humidity and temperature, and the dimensional changes are isotropic in the plane. The disk therefore has an excellent electromagnetic properties such as output fluctuation and outbreak of dropouts caused by the environmental change.
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4.发明授权
公开(公告)号：EP0086302B1
公开(公告)日：1987-09-30
申请号：EP82306263.3
申请日：1982-11-24
CPC分类号： C08J5/18 , B29C55/005 , B29C55/065 , B29C55/143 , B29C55/16 , B29K2067/00 , C08J2367/02 , G11B5/7305 , Y10S428/90 , Y10S428/91 , Y10T428/263 , Y10T428/264 , Y10T428/265 , Y10T428/31786
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公开(公告)号：EP0123258A2
公开(公告)日：1984-10-31
申请号：EP84104340.9
申请日：1984-04-17
CPC分类号： G11B5/825 , G11B5/7315 , Y10S428/90 , Y10S428/91 , Y10T428/24372 , Y10T428/24612 , Y10T428/24942 , Y10T428/24975 , Y10T428/26 , Y10T428/264 , Y10T428/265 , Y10T428/31786 , Y10T428/31797 , Y10T428/31938
摘要： @ A magnetic recording disk which comprises (1) a three-layered laminate consisting of a core layer of a biaxially oriented polyolefinfilm which has a birefringence of not more than 0.01 and an amorphous-region orientation coefficient of not more than 0.2 and two outer layers of a biaxially oriented polyester film adhered to said core layer, and (2) a magnetic layer formed on at least one side of the laminate. The magnetic recording disk of the invention undergoes only slight dimensional changes with variations in humidity and temperature, and the dimensional changes are isotropic in the plane. The disk therefore has an excellent electromagnetic properties such as output fluctuation and outbreak of dropouts caused by the environmental change.
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公开(公告)号：EP0008679A1
公开(公告)日：1980-03-19
申请号：EP79102745.1
申请日：1979-08-01
IPC分类号： B29D7/24
CPC分类号： B29C55/12
摘要： Beim Anmeldungsgegenstand handelt es sich um ein Verfahren zur Herstellung einer biaxial gestreckten Polyesterflachfolie, bei der die Zugfestigkeiten in Längs- und Querrichtung gegenüber herkömmlichen Folien verbessert sind.
Das Verfahren wird derart durchgeführt, daß man eine um jeweils wenigstens das zweifache gestreckte Polyesterfolie in Längs- und Querrichtung nachstreckt, wobei man die Längs- und Quernachstreckung in einem Verhältnis von 1 : 1,05 bis 1 : 2,5 bei einer Temperatur zwischen T g + 10°C (T g = Glasübergangstemperatur des Polyesters) und T m - 40°C (T m = Schmelzpunkt des Polyesters) und eine Nachthermofixierung bei einer Temperatur zwischen T g + 50°C und T m - 10°C durchführt.摘要翻译： 当登记主题是一种用于生产双轴拉伸聚酯平膜，其中，在纵向和横向上的抗张强度比常规的膜改善的方法。 进行所述方法，使得在每种情况下至少两次nachstreckt拉伸聚酯膜在纵向和横向上，得到纵向和Quernachstreckung以1:1的比率：1.05至1：2.5在Tg之间的温度下 + 10℃（聚酯的Tg的=玻璃化转变温度）和T米 - 40°C（TM =熔化的聚酯的点）和Nachthermofixierung在Tg + 50℃和Tm之间的温度 - 10℃下进行。
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7.发明公开Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom 失效Polyäthylentherephthalatfilm，处理其制备和磁记录介质及其。
公开(公告)号：EP0086302A1
公开(公告)日：1983-08-24
申请号：EP82306263.3
申请日：1982-11-24
CPC分类号： C08J5/18 , B29C55/005 , B29C55/065 , B29C55/143 , B29C55/16 , B29K2067/00 , C08J2367/02 , G11B5/7305 , Y10S428/90 , Y10S428/91 , Y10T428/263 , Y10T428/264 , Y10T428/265 , Y10T428/31786
摘要： Disclosed are a polyethylene terephthalate film having the sum of F-5 values in longitudinal and transverse directions of 3500 to 5000 kg/cm 2 , absolute shrinkages in lon- gltudinal and transverse directions at 100°C of up to 2.5% and an amorphous orientation factor of -1.5 to 0.5, a process for the production of the film and a magnetic recording medium having the film as a base. A polyethylene terephthalate film useful as a magnetic recording medium having super high-tensile strengths in both longitudinal and transverse directions and a low heat shrinkage is provided, while it has been considered that such properties could not be obtained in polyethylene terephthalate films.
摘要翻译： 公开了一种聚对苯二甲酸乙酯薄膜具有F-5值的3500至5000公斤纵向和横向方向的总和/厘米<2>在纵向和横向上的绝对收缩以高达2.5％的100℃，无定形取向 的因素 - 1.5至0.5，用于生产薄膜的和具有膜作为基材的磁记录介质的方法。 聚对苯二甲酸乙酯膜可用作具有在纵向和横向两个方向上与低热收缩超高拉伸强度的磁性记录介质被提供，而它已经考虑并搜索属性不能在聚对苯二甲酸乙酯薄膜来获得。
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