Wheaton® White Polypropylene Screw Caps with PVC Liner
Wheaton® white polypropylene screw caps create a positive seal that protects against product escaping and prevents product contamination by outside substances. White Polypropylene screw cap provides clear surface for writing on cap. The PVC liner provides an excellent moisture barrier. The liner is constructed of 1mil polyvinyl film which is bonded to 1mil HDPE plastic on a number 30 white pulp paper backing. The liners are superior to plain pulp paper because they provide an excellent moisture barrier. General purpose screw caps are suitable for wide range of applications. Polypropylene construction proves excellent protection from mild acids, alkalis, solvents, alcohols, oils and aqueous products. Poor for active hydrocarbons and bleaches. These screw caps are designed for use with Wheaton® sample vials, bottles, jugs and containers.