A method for producing a starting material for a cover strip from japanese paper coated with

摘要

It is an object of the present invention, an impregnation coated starting material for a cover tape to provide from japanese paper, in which, even if synthetic fibers cannot be used, the adaptability by slightly stretchable make of the cover strip is improved and the occurrence of ligament can be prevented by a sufficient tensile strength.As a result of comprehensive and intensive investigations it was found that by the use of a machine manufactured japan paper, in which a kraft pulp having from 10 to 70 w -% mercerised soft wood pulp is mixed, a starting material for a band can be obtained, which, in the position is the object to come loose, which in order to achieve the present invention. Even if synthetic fibers, which are easily stretchable, however, as in the prior art can easily be produced under a tangling of the fibers, is not to be used, the adaptability of the starting material can be increased, and in addition, sufficient tensile strength of the cover strip are obtained. As far as synthetic fibers are not used, the tangled avoided by the synthetic fibers, and a uniform japanese paper are obtained. Although it is desirable for synthetic fibers are not be mixed in the japanese paper, it is possible for the purpose of achieving a higher breaking strengths synthetic fibers to be added, as long as the amount thereof is low.