SYNTHETIC RESIN BOTTLE BODY WITH GRIP

摘要

A synthetic resin bottle body with a grip, produced by forming a bottle main body (1) made of PET by biaxial draw blow forming using, as an insert material, a grip (10) formed by injection forming. The bottle main body (1) is shaped such that a vertical projection portion (5) is provided on the center portion at a concave bottom face of a concave portion (3) provided at the rear portion of a trunk portion (2). The grip (10) is shaped such that a grip plate (11) is integrally provided between the upper and lower ends of a pair of assembled beam pieces (12) arranged parallel to each other in a raised position of the bottle body. The width of the grip portion is enlarged from the pair of assembled beams (12) as base end portions toward the tip portion. Fit projections (17) are projected toward substantially the center axis direction of a preform so that a tip face is positioned opposed to the preform outer periphery with the grip being set in a blow- forming mold. An insert portion for the concave bottom face portion near the vertical projection portion (5) of the bottle main body(1) is structured of part of the assembled beam pieces (12) and of the fit projections (17). This way, the insertion capability of the grip (10) is enhanced and fit strength between the bottle main body (1) and the grip (10) is increased.