| 摘要 |
An impulse-dried paper having a three-dimensional pattern of alternating raised and recessed portions which is given the paper in connection with the impulse drying. The paper contains at least 10 % by weight, calculated on the dry fiber weight, of a lignin containg high yield pulp, such as mechanical, thermomechanical (TMP) and chemothermomechanical (CTMP) pulp. It is supposed that the softening temperature of the lignin in the high yield pulp is reached during the simultaneous impulse drying and the embossing and when the paper is cooled the lignin will become stiff again and contributes in locking the three-dimensional structure that has been conveyed to the paper. |
