| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a transparent or translucent heatsensitive material of superior heat matching properties in which sticking, adhesion of settings or head wearing are scarcely generated by containing polyvinylidene fluoride particles represented by a specified formula in a heat-sensitive coloring layer. SOLUTION: As polyvinylidene fluoride particles, a crystalline polymer represented by the formula (in the formula, (n) represents the polymerization degree.) is used. It is desirable to use the polyvinyliudene fluoride particles forming an aggregate of primary particle diameter of 0.5μm or less. When the primary particle diameter is 0.5μm or less, oil absorption power is increased to improve the effect of preventing and sticking, while when it is beyond 0.5μm, transparency is lowered and not preferred. Also it is good to form the particle diameter of the aggregate of 5μm or less, preferably of approximately 3μm from the viewpoints of transparency and heat-sensitive coloring uniformity. |
