Process for producing newsprint
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United States of America Patent
Stats
-
Aug 31, 1982
Grant Date -
N/A
app pub date -
Nov 24, 1980
filing date -
Nov 24, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A high quality newsprint pulp can be produced from wood or vegetable fibers by thermomechanically pulping one portion of these fibers and thermochemically pulping the remaining portion. After combining these pulps the result is a pulp which has a GE brightness of 55 to 60, an opacity of 93 to 96 percent, and a relatively high tear strength. A pulp useful for making low strength papers can be produced by solely thermomechanically pulping fiber and directly using this pulp to make such products.
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