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About product and suppliers:
        Alibaba.com offers 118 polymer envelopes products. About 22% of these are adhesives & sealants, 20% are general medical supplies, and 13% are power banks. 

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

There are 118 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 68 with ISO9001, 53 with Other, and 46 with ISO13485 certification.