. Advancing knowledge of forests and rangelands : 1984 research accomplishments. Wood Research United States Bibliography; Forests and forestry Research United States Bibliography; Forest fires Research United States; Insect pests Research United States; Forest management Bibliography. A Sticky Wastepaper Problem Is Solved Nonwettable adhesive contaminants, which papermakers call "stickies," have been a major obstacle in wastepaper recycling. Sometimes they adhere to papermaking equipment, and sometimes they show up as undesirable spots on the paper product. Scientists at the Forest
. Advancing knowledge of forests and rangelands : 1984 research accomplishments. Wood Research United States Bibliography; Forests and forestry Research United States Bibliography; Forest fires Research United States; Insect pests Research United States; Forest management Bibliography. A Sticky Wastepaper Problem Is Solved Nonwettable adhesive contaminants, which papermakers call "stickies," have been a major obstacle in wastepaper recycling. Sometimes they adhere to papermaking equipment, and sometimes they show up as undesirable spots on the paper product. Scientists at the Forest Products Laboratory, working in coopera- tion with the University of Wisconsin, have developed a device that removes the stickies from wastepaper. At the heart of the new device is a metal disk that spins at high speeds and separates particles based on size, density, and wettability differences. Stickies are about the same size and weight as pulp fibers, but they are not wettable and the spinning disk is able to separate them out on this basis. The unique ability of this device to sepa- rate out stickies while making size and density separations is highly important to the paper industry. If a papermill's capacity must be expanded, adding re- cycling equipment is less expensive than adding a new pulpmill. Recycling of wastepaper has the added advantage of extending the Nation's timber supply by recovering wood fiber, most of which is now being placed in sanitary A smooth metal disk spinning at high speed separates particles on the basis of size, density, and wettability. 56. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Forest Service. [Washington, D. C. ?] : U. S. Dept. of Agriculture, Forest Service
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