Process for making small diameter sticks

Details Process for making small diameter sticks Process for making small diameter sticks

1990-12-20

1992-01-07

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642106, 2642107, 2642108, 26421114, B29C 4790

Patent

active

050789430

ABSTRACT:
A process for making sticks of small diameter being highly stiff, difficult to break or crack and usable as a cotton swab, straw, "sunokos", etc. is provided, which includes extruding a polypropylene resin having a crystallinity of 0.945 or more and a melt flow rate of 0.2 to 20 g/10 minutes and satisfying a relation between melt flow rate and Q value of y.gtoreq.2x+8 wherein y represents Q value and x represents melt flow rate and stretching this stick to 5 times or more the original length thereof.

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patent: 3212132 (1965-10-01), Westlake, Sr.
patent: 3255494 (1966-06-01), Bloch et al.
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patent: 3367926 (1968-02-01), Voeks
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patent: 3962205 (1976-06-01), Ward et al.
patent: 4259790 (1981-04-01), Borisof
patent: 4287149 (1981-09-01), Capaccio et al.
patent: 4339499 (1982-07-01), Tappe
patent: 4384098 (1983-05-01), Hagler et al.
patent: 4739025 (1988-04-01), Burch

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