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1.发明公开Manufacture of blanks for recording discs utilizing coextrusion and blanks and records made thereby 失效通过使用共挤出和制备的模制品和记录生产模制品用于记录的。
公开(公告)号：EP0032452A2
公开(公告)日：1981-07-22
申请号：EP81300123.7
申请日：1981-01-13
申请人： H.B. FULLER COMPANY
CPC分类号： B29C47/145 , B29C43/02 , B29C47/0019 , B29C47/065 , B29L2017/003 , Y10S425/81 , Y10T156/1039 , Y10T156/1041 , Y10T428/25 , Y10T428/31909 , Y10T428/31928
摘要： It been found that a layered recording disc having an inexpensive core layer and high quality recording groove-accepting outer layers can be made in a relatively simple manner through an application of the technique known as coextrusion, wherein a common die, e.g. a coextrusion die (10) having a die orifice (11) for a plurality of streams (13,23 and 33) provides a multilayer coextrudate (60) having a plurality of layers (64,74 and 84). The coextrudate (60) can be cut into segments (60a) with a suitable cutting means (20). The coextrudate segments can be substantially of record thickness with a circular periphery. Alternatively, coextrudate segments (60b) can be much thicker than a record and much smaller in surface area. In either case, segments can be compression molded into discs (100) having the desired profile and/or grooves.
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2.发明公开
公开(公告)号：EP0032452A3
公开(公告)日：1983-01-26
申请号：EP81300123
申请日：1981-01-13
申请人： H.B. FULLER COMPANY
CPC分类号： B29C47/145 , B29C43/02 , B29C47/0019 , B29C47/065 , B29L2017/003 , Y10S425/81 , Y10T156/1039 , Y10T156/1041 , Y10T428/25 , Y10T428/31909 , Y10T428/31928
摘要： It been found that a layered recording disc having an inexpensive core layer and high quality recording groove-accepting outer layers can be made in a relatively simple manner through an application of the technique known as coextrusion, wherein a common die, e.g. a coextrusion die (10) having a die orifice (11) for a plurality of streams (13,23 and 33) provides a multilayer coextrudate (60) having a plurality of layers (64,74 and 84). The coextrudate (60) can be cut into segments (60a) with a suitable cutting means (20). The coextrudate segments can be substantially of record thickness with a circular periphery. Alternatively, coextrudate segments (60b) can be much thicker than a record and much smaller in surface area. In either case, segments can be compression molded into discs (100) having the desired profile and/or grooves.
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