At the end of the 20th century, with the changes and demands of the market economy, many users asked whether it is possible to produce a duplex board with white back whose quality is between that of ivory board and gray-backed duplex board. After two months of market research, internal production process change and trial production feasibility study, it is believed that it has the ability to develop white back duplex board. The development of duplex board with white back can not only alleviate the fierce competition in the existing gray-backed duplex board market, but also improve economic benefits, and change the gray-backed process to the white-backed duplex board production process without requiring large investment , will be able to adapt to production.
Renovate the beating system first, design a new refining production line, and purchase sophisticated refining equipment, three double-disk mills and high-density measuring equipment. After exploration and discussion, the refining process was quickly mastered, so that the quality and ratio of refining can not only meet the surface pulp, but also ensure the quality of the bottom pulp.
Selection of pulp types: choose Canadian Sun brand long-fiber bleached wood pulp for medium and long fiber, choose homemade bleached and homemade awns straw pulp for short fiber, choose waste newspaper deinking pulp for face pulp, waste boxboard paper and Daolin paper for core pulp For the mixed pulp, the base white pulp is made by ourselves, and the white base pulp is Indonesian Tiger brand bleached broadleaf pulp, because the quality of Tiger brand is better than that of Eagle brand. It can meet the requirements, the price is relatively low. So choose Indonesian Tiger brand broadleaf pulp as the base.
The quality index of the white-backed duplex board produced in trial production has reached the first-class standard, and can be compared with South Korea’s Baima brand. After trials by various users, it can basically reach the quality of imported white-backed duplex board. The development of duplex board with white back is successful, which not only improves economic benefits, but also fills the blank of the market.
Post time: Nov-28-2022