A paper manufacturing process

摘要

Waste paper bales are delivered to a pulper (13). Water is mixed with the wastepaper to produce a liquid stock. The stock is filtered in batches in a filter (15) to remove waste such as plastics and metal pieces and is returned to the pulper. The stock is further purified in a separator and a number of cleaners prior to delivery to web forming apparatus (48) having a belt with applied suction. When formed, a web is passed over a number of drying rollers of a dryer 53 and through a size press when starch is applied. Progress of the web through the dryer 53 is monitored by sensors which detect any web breaks to immediately cut the web to stop progress of the web through the dryer or size press to cause damage to the latter. The web may be cut by a water or air jet. The web may also be cut at the outlet of the forming apparatus (48).