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US 11,076,995 B2Granted
Cold-drawn polyolefin copolymers cord for earplug
Assignee3M Innovative Properties Company
InventorsJames D. Brown, Feng Cai, Robert C. Coffin
Life of this patent
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Abstract
An earplug assembly and method of forming the same is described. The method includes uniaxially stretching a cord formed of copolymer including ethylene segments and vinyl acetate segments to form a cold-drawn cord. The cold drawn cord has an elongation to break of 250% or less. The method then includes fixing the cold drawn cord to an earplug.
Claims11
A method comprising:
- uniaxially stretching a cord formed of copolymer comprising ethylene segments and vinyl acetate segments at room temperature to form a cold drawn cord, the cold drawn cord having an elongation to break of 250% or less;
- and
- fixing the cold drawn cord to an earplug.
Dependencies are inferred from the claim text.