Polyester monofilament for use in screen gauze
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
Aug 30, 2001
filing date -
Jan 11, 1999
priority date (Note) -
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Abstract
A core-sheath composite type polyester monofilament for use in a screen gauze in which the sheath ingredient is a polyester formed by adding and copolymerizing, based on the polyester, 2 to 10% by weight of a polyalkylene oxide with a coloration degree (APHA) after heating at 175.degree. C. for one hour of 30 or less and having a number average molecular weight of from 300 to 4000 and having a peak temperature (Tmax) of a dynamic loss tan (tan .delta.), at a measuring frequency of 110 Hz of from 97 to 120.degree. C. which is lower by 10.degree. C. or more than that for the core and the area ratio of core to sheath is within a range from 60:40 to 90:10. The polyester monofilament for use in a screen gauze is a monofilament for use in the high mesh screen gauze capable of completely preventing formation of scams during weaving, satisfactory in the gauze tension and excellent in the dimensional stability of gauze and in the adhesion to the photosensitive resin.
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