METHOD OF MANUFACTURING POROUS FILM MATERIAL FROM NASCENT REACTOR ULTRAHIGH- MOLECULAR POLYETHYLENE POWDER

FIELD: polymer materials. SUBSTANCE: invention relates to production film polymer materials with open porous structure and, in particular, capillary-porous permeable materials. Initial partially oriented film material is prepared from nascent reactor ultrahigh-molecular polyethylene powder using sol...

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Bibliographische Detailangaben
Hauptverfasser:	OZERIN A.N, D'JACHKOV A.N, BAKEEV N.F, MITCHENKO JU.I, GRIBANOV S.A, VALENDO ALEKSANDR JAKOVLEVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	FIELD: polymer materials. SUBSTANCE: invention relates to production film polymer materials with open porous structure and, in particular, capillary-porous permeable materials. Initial partially oriented film material is prepared from nascent reactor ultrahigh-molecular polyethylene powder using solid-phase formation technique, whereupon material is treated with high-boiling organic solvent at temperature inferior to melting temperature of polyethylene resulting in simultaneous swelling and shrinkage of material. Material is then cooled in air and/or by treating it with at least one low-boiling solvent. The latter is removed and material is further dried under isometric conditions. Final product is characterized by high rupture strength and considerable pore volume. EFFECT: enabled continuous manufacture and avoided multistep treatment of initial film with organic solvent. 8 cl, 1 dwg, 3 tbl, 7 ex