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About product and suppliers:
        Alibaba.com offers 106 polymer envelopes products. About 23% of these are adhesives & sealants, 16% are power banks, and 16% are general medical supplies. 

A wide variety of polymer envelopes options are available to you, such as poly, poly bubble. You can also choose from free samples. 

There are 106 polymer envelopes suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of polymer envelopes respectively. 

Polymer envelopes products are most popular in North America, Domestic Market, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 54 with ISO9001, 45 with ISO13485, and 41 with Other certification.