According to information from the State Intellectual Property Office on October 17, Nine Dragons Paper (Dongguan) Co., Ltd. applied for a patent titled "A kind of all-wood pulp high white offset paper and its preparation process", with the public number CN 118773948 A. The application date is February 2024.
The patent abstract shows that the invention belongs to the technical field of offset paper, and in particular relates to an all-wood pulp high-white offset paper and its preparation process, including in weight percentage: long fiber pulp 10% to 15%; short fiber pulp 65% %～75%; homemade chemical pulp 15%～20%; the freeness of the long fiber pulp is 300ml～340ml; the freeness of the short fiber pulp is 330ml～370ml; the freeness of the homemade chemical pulp is The freeness is 330ml ~ 370ml; the whiteness of the finished paper can reach 100 degrees (normally 90 degrees), the paper bulk is above 1.3 (normally 1.2), the L value is above 93 (normally 90), and the physical strength index is increased by about 20%. The proportion of all-wood pulp can greatly reduce the use of virgin chemical pulp. The paper produced has low cost and large profit margins, and has great market development potential. It can also further promote the in-depth application of clean production and circular economy technology in my country's paper industry.