Composite kraft paper and preparation method thereof

• Main Author: HE FENGFEI
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2019
• Subjects: APPARATUS THEREFOR; IMPREGNATING OR COATING OF PAPER; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; PULP COMPOSITIONS; REGENERATION OF PULPING LIQUORS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention discloses composite kraft paper. The composite kraft paper is prepared from surface layer slurry and bottom layer slurry, wherein the surface layer slurry is prepared from waste book paper deinked pulp and a pigment, and the bottom slurry is prepared from waste cement paper bag pulp. According to the composite kraft paper, resources are saved, the environment is protected, the production cost is lowered, meanwhile, the air permeability, the tensile index, the bursting strength and the tearing strength of the kraft paper are improved, in addition, the color of the prepared kraft paper is the natural color of the kraft paper which people are used to, and the performance and the applicability of the kraft paper are improved. 本发明公开种复合牛皮纸，其制备原料包括面层浆料和底层浆料，所述面层浆料由废书纸脱墨浆和颜料组成，所述底层浆料由废水泥纸袋浆组成。本发明在节约资源、保护环境和降低生产成本的同时，提高了牛皮纸的透气度、抗张指数、耐破度和撕裂度，且制得的牛皮纸颜色为人们习惯的牛皮纸本色，提高了牛皮纸的性能和适用性。