Production of a photosensitive recording element

US5332649A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Bleckmann · Lampertheim, DE
• Thomas Loerzer · Bischofswerda, DE
• Thomas Telser · Weinheim, DE

Key dates

• Filing date: Dec 21, 1992
• Grant date: Jul 26, 1994
• Expiry date: Dec 21, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/7644
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

For the production of a recording element having a photopolymerizable recording layer comprising at least two individual layers having the same composition or different compositions, located one on top of the other and firmly bonded to one another, the components used for the production of the individual layers are melted together, homogeneously mixed and freed from gaseous constituents in a self-purging, twin-screw extruder. Thereafter, the component mixture is divided into two or more material streams in a manner such that at least one material stream is removed from the extruder, transported by means of a delivery pump to an adapter or to a multilayer die and bonded there with a material stream from the screw extruder after shaping in each case to give sheet-like structures. During transport of the separate material streams, further components may be metered into or mixed with said streams, so that individual layers having the same or different properties are obtained. The individual layers or the recording layer are or is subsequently calendered.