PEN POINT MADE OF RESIN HAVING GAP FOR OUTFLOW OF INK

摘要

PURPOSE:To enhance abrasion resistance, to extend the life of a writing utensil and to improve a writing feeling by molding a pen point made of a resin having a gap for outflow of ink using a compounded composition containing a thermoplastic liquid crystal polymer and fluoroplastic. CONSTITUTION:A thermoplastic liquid crystal polymer is obtained by copolymerizing one or more kind of terephthalic acid, 6-hydroxy-2- naphthalenecarboxylic acid, biphenol and polyethylene terephthalate with para- hydroxybenzoate or para-acetoxybenzoate and the content thereof in a compounded composition is pref. 20wt.% or more from an aspect utilizing the rigidity and crystal orientation of the molecule of this polymer. As fluoroplastic, a tetrafluoroethylene resin, an alkoxy ethylene fluoride resin or an oligomer thereof may be used and the content thereof in the compounded composition is pref. 15wt.% or more from an aspect utilizing the lubricity of fluoroplastic. In order to secure a gap for outflow of ink in a molded article when a pen point is prepared from the above mentioned compounded composition, it is pref. to use an extrusion molding machine from the viewpoint of manufacturing cost.