| 摘要 |
<p>A heat-sensitive copy sheet comprises a tracing paper coated successively with a polyvinyl butyral binder dispersion of heat interreactant particles of ferric stearate and methyl gallate and an opaque surface coating of 166 parts by weight titanium dioxide, 100 parts by weight ethyl cellulose and 134 parts by weight triphenyl phosphate which becomes tacky at about 65 DEG C. Specifications 829,001, 863,366, and 863,641 are referred to.ALSO:A temporary adhesive layer which is nontacky at room temperature and is rendered tacky by heating may be impregnated on to both sides of a paper tissue. Reference is made to using for the temperary adhesive layer cellulose esters and ethers, vinyl polymers or natural gums or resins with other plasticizers such as dioctyl phthalate. Specifications 829,001, 863,366 and 863,641 are referred to.</p> |
