| 摘要 |
A one side matte conversheet is formed of a multi-layer laminate which is matte embossed and features improved smoothness and reduced micropitting on the non-matte side which makes this article particularly suitable for use as a photopolymer coversheet. A method of producing the coversheet involving the melt casting of a coextruded polymeric continuous web having at least two layers and using polymers which exhibit differences in melting temperature and/or crystallization temperature, is also shown. According to the method, sufficient quenching or cooling of the higher melting temperature or higher crystallization temperature resin on the smooth side is accomplished to set this layer prior to entering a nip roll arrangement to rubber roll emboss the lower melting temperature or lower crystallization temperature matte side resin. It is the setting or crystallization of the smooth side resin prior to embossing which affords greater control of the web in the embossing step as well as improved smoothness with significantly reduced micropits on the smooth side of the resulting coversheet.
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