纯铜、纯铝和包铜铝变压器有什么区别——我该买哪一种？

The transformer is the heart of any impulse heat sealer. The market offers three types — and the price difference hides a massive performance gap:

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Industry Warning: Copper-clad aluminum being sold as “pure copper” is a widespread practice. The naked eye cannot tell the difference. Here’s how to verify: bend the transformer lead wire firmly — pure copper flexes without breaking; aluminum wire snaps. Alternatively, weigh the transformer against spec — copper is significantly heavier for the same size.

YGPACK’s Commitment: Every YGPACK machine ships with a certified pure copper transformer. We publish the copper weight(in grams) on every product spec sheet and welcome customers to disassemble and verify upon receipt.