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Waste pulp is generally used to make with other pulps. According to the quality of paper, the proportion of waste pulp will fluctuate a little. Waste pulp can also be used to make newsprint, courragated paper, etc. Then, what are the main impurities in waste pulp?
1. Slices: Paper that has not been untied may be due to insufficient pulping or difficult to break, such as sun-dried newspapers or paper with wet strength agent.
2. Plastics: For example, polyethylene sheets or thin films, usually come from packaging bags and other packaging materials. Plastics can withstand the force of mechanical breakdown better than paper, so they can be removed by screening.
3. Adhesives: including hot melts, pressure sensitive tapes and latex adhesives, which are mainly used for tapes, trademarks and sealing packages. The strength of these adhesives is worse than that of plastics, so we must pay attention to screening them before they break into fibers.
4. Other particles: for example, wax, asphalt, ink and coating which are difficult to remove through screening will be removed mainly by means of flotation, slag removal, washing, even rubbing, or by strong dispersion to make them disappear from the naked eye. Generally speaking, the type and size of impurities play a decisive role in the selection of various factors.
leizhan can supply the whole set of screen machine, which can remove all the impurities in pulp, improving the quality of pulp. If you need waste paper pulp line, welcome to contact us for more benefits and quotation.
Email: flutingpapermachine@gmail.com