VIBRATORY MOLDING PROCESS AND PRODUCT

摘要

A fastener strip (100) is disclosed having a permanently sealed, airtight portion (140) and a reclosable portion (120) capable of maintaining an airtight seal when closed. The permanently sealed portion is generally planar and essentially impervious to air flow. The reclosable portion includes a ridge (128) and a trough (124), joined at their adjacent ends to a plug, which prevents air from leaking from the adjacent end of the reclosable portion. Additionally, a dam (180) joins the plug to the first backing (122) in an airtight seal, and joins the plug to the second backing (126) in an airtight seal. A method and apparatus for sealing portions of a thermoplastic fastener strip (100) are also disclosed. A method is additionally disclosed for vibrating and molding thermoplastic materials, in which a flow of malleable thermoplastic material is initiated and molded with an effectively dimensioned vibrator that is unitary, with a first matrix for guiding and molding the malleable polymer.