Effects of polyvinylamine prepared by basic hydrolysis of poly(N-vinylformamide) on paper strength, drainage and retention of reed pulp and wheat straw pulp were investigated.
This paper introduces experiment clearing away hydrosulfuric and mercaptan in waste gas from industry and o-zone, retention period, catalyzer and so on influence on removal rates.
Duct into the bedye fomulation the bedye elixir at the same time amid protect the sum nursing with the offer,and can make dye the post -hair the guilder retention the health.