| 摘要 |
<p>PURPOSE:To impregnate thermoplastic resin, which could not be impregnated between fibers, and control the degree of crystallization in accordance with the characteristics of resin by a method wherein a woven cloth, consisting of a plurality of continuous fibers, is heated to a temperature higher than the softening point of the thermoplastic resin and the coating film of the thermoplastic resin is formed on the surface of the woven cloth. CONSTITUTION:The thermoplastic resin is molten in an extruding machine 14 to extrude it from a die 13 and is coated on the surface of heated resin film providing roll 15. Impregnation of the resin between the fibers of the woven cloth 11 is started by contacting the woven cloth with the roll provided with the resin coating film in such manner. Impregnation is achieved by the arrival of the resin to the surface of the woven cloth. The contact pressure between the woven cloth and the roll is such a degree that the cloth can be arrived at the surface of the roll under pushing through the coating film of the resin. The contact pressure may be regulated by a tension in the take-off direction applied on the cloth and another tension in the widthwise direction of the cloth, which is generated by pinching the cloth 11 between belts, provided at both ends of the rolls 15, 16, 17, and the rolls. The woven cloth 11, coated with the resin, is pressed by one set or more than two sets of heating rolls to improve the degree of impregnation, thereafter, is cooled and is taken off. The temperature of these heating rolls 17 is higher than the softening point of the resin impregnated into the cloth.</p> |
