Invention Grant
- Patent Title: Gradient density padding material and method of making same
- Patent Title (中): 梯度密度填料及其制作方法
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Application No.: US10419765Application Date: 2003-04-22
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Publication No.: US08637414B2Publication Date: 2014-01-28
- Inventor: Durward Gomez , Steven Borchardt
- Applicant: Durward Gomez , Steven Borchardt
- Applicant Address: US CT Manchester
- Assignee: Lydall, Inc.
- Current Assignee: Lydall, Inc.
- Current Assignee Address: US CT Manchester
- Agency: Cantor Colburn LLP
- Main IPC: D04H1/54
- IPC: D04H1/54 ; D04H1/00 ; E04B1/84 ; B29C43/24

Abstract:
A gradient density padding material includes a single layer of nonwoven material having at least one surface processed to form a portion of a thickness thereof having a density increased with respect to a remaining portion of the thickness thereof. The single layer of nonwoven material after processing has an airflow resistance within the range of 200-4000 MKS Rayls, wherein said single layer of nonwoven material has an enhanced acoustic performance. A method of making a gradient density padding material having an enhanced acoustic performance includes the steps of providing a single layer of nonwoven material and processing at least one surface of the single layer of nonwoven material to form a portion of a thickness thereof having a density increased with respect to a remaining portion of the thickness thereof. The single layer of nonwoven material after processing has an airflow resistance within the range of 200-4000 MKS Rayls.
Public/Granted literature
- US20030199216A1 Gradient density padding material and method of making same Public/Granted day:2003-10-23
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