Paper products and methods and systems for manufacturing such products

摘要

Methods of producing cellulosic or lignocellulosic materials for use in papermaking include treating a cellulosic or lignocellulosic dry feedstock having a first average molecular weight with ionizing radiation, and controlling the dose of ionizing radiation such that the average molecular weight of the feedstock is reduced to a predetermined level. A method of producing an irradiated paper product includes treating a paper product including a first carbohydrate-containing material having a first molecular weight with ionizing radiation, and controlling the dose of ionizing radiation so as to provide an irradiated paper product with a second carbohydrate-containing material having a second molecular weight higher than the first molecular weight. Pulp and paper products are produced.

主权项

1. A method of treating paper or a paper precursor, the method comprising:
exposing paper or a paper precursor to accelerated charged particles, the accelerated charged particles having been formed by generating a plurality of charged particles and accelerating the plurality of charged particles, to deliver to the paper or paper precursor a radiation dose of about 0.1 to 5 Mrad; quenching the irradiated paper by contacting the irradiated paper with a gas selected to react with radicals present in the treated paper product, the gas being selected from the group consisting of oxygen, nitrogen, acetylene, ethylene, chlorinated ethylenes, chlorofluoroethylenes, propylene and mixtures thereof; and printing the paper after exposure to the charged particles and quenching.