Research on paper properties variation of softwood chemical pulp applying to APMP pulp

APMP pulp and the long fiber fraction of APMP pulp were used to prepare handsheets with the addition of chemical pulp(softwood pulp)and the short fiber fraction,respectively.Paper properties variation of softwood pulp applying to APMP pulp were researched by studying the variation of tensile strength,tear strength and internal bond strength of handsheets.The results showed that the tensile strength,tear strength and internal bond strength increased with the increasing the chemical pulp dosage when APMP pulp was used to prepare handsheets with the addition of softwood pulp.The tensile strength and tear strength of handsheest,which were prepared APMP pulp with short fiber content of softwood pulp,had a twist when the short fiber contents of softwood pulp were 15%.The tensile strength and tear strength increased with the increasing the chemical pulp dosage when APMP pulp and the long fiber fraction of APMP pulp were used to prepare handsheets with the addition of softwood pulp,respectively.Otherwise,the fiber length and strength had a great effect on paper properties,which was prepare handsheets with APMP pulp.The compressing of paper was increased with the increasing the chemical pulp dosage.The short fiber content of APMP pulp played a significant role in the strength of handsheets.