Use natural sulfitesChemical wood pulporCotton pulpAnd approved by thebeating,sizingWithout filling, there is no fillingLong mesh paper machineonManufacture paper with pulpAnd into. Use the base paper with a swelling agentZinc chlorideA solution or cuprammonium solution) impregnated to makecelluloseMoisten swell gelatinize, then glue layer upon layer on gelatinizer, pass againagingMature, water desalination, dry plastic, made of vulcanized fiber. Add red or gray. forMechanical and electrical,textileAnd other industries make all kinds of toolsgasket,Insulation materialsAnd otherpartsThe use of.

        Vulcanized fiber are processed by a special processSpecialty paper, used as insulation material andHeat insulation materialAnd so on.

       Vulcanized fiber is made ofcelluloseAnd its derivatives are made of zinc chloride solution, a metal salt, which has strong swelling and gelatinizing properties on celluloseTreating agentThe modified processing paper, also known as hardening paper, is made from the treatment of the steel base paper, while cellulose and its derivatives are chemical products, and the flake made from the chemical products should be pressedplasticIn the 39th chapter, refer to item provisions in this chapter, the foam plastic board, sheet, film, foil, and flat bar in item 3920, check the goods under subtitle, and according to the concrete column names in 39207900 (the original is 39207200, this customs code within the manual does not exist in 2011).