FIELD: writing and drawing accessories.
SUBSTANCE: present invention relates to a simple or colour pencil containing following 3 coextrusion layers: unexpanded polyolefin-based lead, non-expanded protective intermediate layer, surrounding lead and containing mixture of polystyrene and EVA, and an expanded artificial wood frame based on the styrene polymer surrounding the protective intermediate layer, wherein ratio of protective intermediate layer thickness to lead length ranges from 0.05 to 0.17, preferably from 0.07 to 0.15.
EFFECT: disclosed is a pencil.
14 cl, 2 dwg
Title |
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