Abstract: A modified polyurethane carrier substrate is provided. The modified polyurethane carrier substrate is formed from a modified polyurethane. The modified polyurethane includes a soft segment and a hard segment. The soft segment is formed from a polyol. The hard segment is formed from diisocyanate and a chain extender. The chain extender is dianhydride. A common logarithm of a ratio of a storage modulus of the modified polyurethane carrier substrate at ?30° C. to a storage modulus of the modified polyurethane carrier substrate at 150° C. ranges from 0.40 to 1.30.

Abstract: The present invention proposes an improved structure of electric plug comprising a positioning seat, at least two conducting sheets, at least two springs, at least two insulating sleeves, and a plug body. The insulating sleeves are placed into first slide grooves of the positioning seat. The insulating sleeves have second slide grooves, which are sleeved onto front sides of the conducting sheets, respectively. The positioning seat has first positioning holes connected with the first slide grooves to receive the springs. The positioning seat and the joining portion of rear sides of the conducting sheets and a power code are integrally formed with the plug body by means of mold ejection to be tightly sheathed by the plug body after being assembled and positioned, hence achieving firmer assembling and positioning effect.