Abstract: A palletizer comprises a lifting mechanism (1) and a stacking mechanism (2) including a carriage (28), a roller conveyer (33), an upper plate (39), a lower plate (40), and an abutment plate (53). The palletizer further comprises a moving table assembly (3) including a table (64) and a control unit (4). The lifting mechanism (1) vertically transfers a plurality of loads (W) delivered by an external conveyer (6). Then, the roller conveyer (33) of the stacking mechanism (2) horizontally transfers the loads (W) received from the lifting mechanism (1) onto the lower plate (40) in front of pallet (P), where the upper plate (39) and the abutment plate (53) hold a first load (W) therebetween and slide it over to a point over the stacking position. Then, the lower plate (40) is pulled out from under load (W) to place it on the pallet (P). In the same manner, the next load (W) is placed on the pallet (P) in front of the first load (W).

Abstract: A soft polyurethane elastomer containing isocyanurate ring prepared by reacting polyoxypropylene polyol having an OH equivalent molecular weight of about 500-3,000, and a functionality of about 2-5, and polyisocyanate compound in the presence of tertiary amine catalyst, and if desired further combined with organic tin catalyst. This process is advantageous in facilitation of material control during curing reaction, low exothermicity and high thermal stability of the resulting polymer. Further the properties of the polymer are improved by using ethyleneoxide addition polyoxypropylene polyol instead of the above polymer and a specific tertiary amine as a catalyst. The elastomer thus prepared is significantly suitable for tire filling material.