Production process for producing differentiated polyester staple fibers by using PET plastic bottle sheets

The invention relates to a production process for producing differentiated polyester staple fibers by using PET plastic sheets. The production process includes the steps of bottle sheet pre-treatment, bottle sheet spinning and winding, drafting, tension heat setting, curling, relaxation heat setting, cutting and packaging, and inspection and warehouse entering. In the tension heat setting, heating rollers which are distributed in two layers in a staggered manner, wherein the upper layer includes nine heating rollers, and the lower layer includes eight heating rollers. The bottle sheet preprocessing step further comprises a color proportioning process of the bottle sheets. According to the color proportioning process of the bottle sheets, when staple fibers for clothes and home textiles are produced, blue and white net bottle sheets are adopted, while staple fibers for the fillers of toys are produced, net bottle sheets in other colors are adopted. The staple fibers produced by adopting the production process are soft and have high resilience. When contacting products made of the staple fibers, people can feel comfortable. The products made through adopting the production process have a bright market prospect.