Preparation method of liquid crystal polyester film

The invention belongs to the field of material preparation, and discloses a preparation method of a liquid crystal polyester film, which comprises the following steps: spinning liquid crystal polyester into liquid crystal polyester fibers, shearing to obtain liquid crystal polyester chopped fibers,...

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Bibliographische Detailangaben
1. Verfasser:	JIN LIANGWEN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADHESIVES APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY DYES ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY IMPREGNATING OR COATING OF PAPER MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL OR ARTIFICIAL THREADS OR FIBRES NATURAL RESINS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING POLISHES PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRINTED CIRCUITS PRODUCTION OF CELLULOSE PULP COMPOSITIONS SPINNING TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	The invention belongs to the field of material preparation, and discloses a preparation method of a liquid crystal polyester film, which comprises the following steps: spinning liquid crystal polyester into liquid crystal polyester fibers, shearing to obtain liquid crystal polyester chopped fibers, then carrying out fibril treatment and pressing to obtain liquid crystal polyester paper, and carrying out hot pressing to obtain the liquid crystal polyester film. The fibril treatment comprises the steps of soaking liquid crystal polyester chopped fibers in a solvent, stirring, dispersing, standing, filtering, forming a liquid crystal polyester paper coarse body on a filter screen, squeezing, dehydrating and drying. The liquid crystal polyester film prepared by the preparation method simultaneously meets the characteristics of high tear strength and excellent dielectric property, the tear strength is greater than 500mN, and the dielectric constant of the liquid crystal polyester film can be adjusted to be below 3