Heat seal lids 1.Thickness:30-50micron 2.Material:PS/PP/PVC/PET/PE plastic, glass cups,jars,containers etc Zhenghui Printing ... & Packing Industrial Co.,ltd manufacture high quality Heat seal lids used for milk,that are immensely used in food ... requirements of our clients.Heat seal materialPS/PP/PVC/PET/PE plastic, glass cups,jars,containers and also special protective ...