抄録
The cold processing of amorphous linear polymers is performed mainly due to the solid freezing of the deformation strain at room temperature. In crystalline polymers, the cold plastic deformation occurs, which is understood to have been caused by slip etc. in the crystalline domains at room temperature. It is added to the above mentioned frozen strain. Hence the residual strain in cold processing of crystalline polymers is more stable and more permanent than that of amorphous polymers. Such new cold-treatment of crystalline polymers is experimentally studied in the compression test of polyacetal resin (Delrin) and acetal-copolymer resin (Duracon) and is examined in terms of the practical cold working of upsetting and bulging.
