http://www.wanqipk.com/cap-sea....l-liner/induction-se
Induction seal for glass(GP-520A) is a double-piece aluminum foil paper gasket for electromagnetic induction sealing. It uses pulp board with a thickness of 0.9mm coated with polyester film as the backing layer. The pure aluminum foil with a thickness of 0.1mm functions as the sealing layer, and the paperboard and aluminum foil are combined with an adhesive without wax,
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