James P. Endle,Jeffrey L. Hamer,Alan R. Seville,Kenneth F. Teeters
申请号：
US14601356
公开号：
US10065344B2
申请日:
2015.01.21
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A method of making personal protective equipment, such as a push-in earplug, is disclosed. The method includes the steps of covering a substrate with an outer layer that includes an unactivated foaming agent, positioning at least a portion of the outer layer in a mold, and activating the foaming agent such that a portion of the outer layer expands.
