| 摘要 |
1,050,762. Paper. CHEMICAL INVESTORS, S.A. May 27, 1963 [May 28, 1962] No. 21102/63. Heading D2B. Paper or paperboard is sized by contacting its surface with the aqueous latices of homopolymers or copolymers of ethylene described in Specifications 949,722; 959,815; 964,025; 964,026 and 980,595, with or without other surface sizes such as glue, polyvinyl alcohol, alginates or starch. These may be applied on- or offmachine in a size tub or press, or at the calender stack. The treated paper has antistatic properties. In the Examples, paper is prepared from a furnish of kraft pulp, clay, rosin size, dyes and alum, and is surface-sized with acetylated starch alone or mixed in various proportions with the polyethylene latex of Specification 949,722. |
