| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide litter sand that is arranged on the upper side of a pet litter box of a double structure, has water repellency, a water-absorbing property and moderate elasticity and is disposable as a combustible waste. <P>SOLUTION: A polypropylene film and pulp fibers are simultaneously crushed into a size of 5-8 mm and the crushed material is mixed with a deodorant to give a raw material. The component ratio of the mixture of the crushed polypropylene films: the crushed pulp fibers: the deodorant is 50:50:2 (pts.wt.). The mixture is fed to a vertical pressing granulator, pressured and discharged from a molding opening having a screen diameter of 6 mm. The appearance of the rod-like discharged material is observed and the surface temperature of the material is measured. The surface of the discharged material has cracks not to grow in such a degree as not to retain the shape thereof. The surface temperature thereof is in a range of 60-70°C. The discharged material pushed out from the molding opening is cut into an appropriate length to give pellets for litter sand for pet. <P>COPYRIGHT: (C)2012,JPO&INPIT |
