| 摘要 |
<p>A polyester binder fiber for paper making, which has an intrinsic viscosity of 0.35 to 0.49 and a single fiber fineness of 1.5 dtex or less, and exhibits an sheet area shrinkage percentage of 70 % or less, the shrinkage percentage being represented by the following formula: sheet area shrinkage percentage (%) = {(A0-A1)/A0} X 100 wherein A0 is the area of a sheet before shrinking treatment, A1 is the area of the sheet after shrinking treatment, the sheet is prepared by agitating and mixing 80 wt % of polyester binder fibers cut into pieces having a length of 5 mm and 20 wt % of NBK in water, to disperse them in water, and making a sheet having a size of ca. 25 cm × ca. 25 cm and a grammage of about 50 g/m2, and the shrinking treatment is carried out in a manner wherein the sheet is dried for a day or more at room temperature, and then is placed on a perforated Teflon sheet and subjected to relaxation shrinkage in a hot circulating dryer at 140˚C for 5 min.</p> |
