牛皮纸(kraftpaper)，用作包装材料。强度很高。通常呈黄褐色。半漂或全漂的牛皮纸浆呈淡褐色、奶油色或白色。定量80~120g/m2。裂断长一般在6000m以上。抗撕裂强度、破裂功和动态强度很高。多为卷筒纸，也有平板纸。采用硫酸盐针叶木浆为原料，经打浆，在长网造纸机上抄造而成。可用作水泥袋纸、信封纸、胶封纸装、沥青纸、电缆防护纸、绝缘纸等。
Kraftpaper (kraftpaper) is used as packaging material. The intensity is high. Usually yellowish brown. Semi-bleached or fully bleached kraft pulp is light brown, cream or white. Quantitative 80~120g/m2. The fracture length is generally above 6000m. The tear strength, rupture work and dynamic strength are high. Mostly roll paper, but also flat paper. Using kraft softwood pulp as raw material, it is made by beating on a Fourdrinier paper machine. It can be used as cement bag paper, envelope paper, glue seal paper, asphalt paper, cable protection paper, insulation paper, etc.
