CONTAINER PORT PART, RESIN-MADE CONTAINER COMPRISING CONTAINER PORT PART, AND PREFORM COMPRISING CONTAINER PORT PART

摘要

To provide a port structure in which dent more hardly occurs during transportation and others.SOLUTION: In a container port part 10 which is provided at a container body and is sealed because a seal part contacts with an inner periphery surface when a cap that includes the seal part therein is fitted, a circular arc part 14 which is convex toward the inside is formed between a top surface 12 and an inner periphery surface 13 of the container port part 10. A tangential line T at the circular arc part 14 has, as a starting point, a connection point between the circular arc part 14 and the top surface 12 or a cross point A2 between a virtual extension line E1 of the circular arc part 14 and the top surface 12 or a virtual extension line E3 of the top surface 12, and an angle θ between the top surface 12 and the tangential line T is 30° to 60°.SELECTED DRAWING: Figure 3