FOAMING ARTICLE Russian patent published in 2018 - IPC A61F11/08 A61F11/14 C08J9/10 C08J9/32 B32B5/18 B32B1/08 

Abstract RU 2669638 C1

FIELD: medicine.

SUBSTANCE: invention relates to articles suitable for forming an ear plug. Article comprises elongated core or base containing first material and having first and second ends or main surface, and outer layer or outer main surface, containing thermoplastic second material, covering at least part of outer main surface of elongated core or base and comprising an unactivated foaming agent with expanding spheres or an unactivated chemical foaming agent. In this case, the non-activated blowing agents can be activated to increase the volume of the outer layer and the core has a stiffness greater than that of the outer layer.

EFFECT: technical result is to ensure the ease of insertion into the ear canal, which does not require preliminary compression or "rolling" of the shuddering part, wherein outer layer provides adequate comfort when placed in user ear canal.

12 cl, 13 dwg

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RU 2 669 638 C1

Authors

Hamer Jeffrey L.

Seville Alan R.

Teeters Kenneth F.

Dates

2018-10-12Published

2013-06-28Filed