Sound-absorbing air duct for vehicle containing polyester fiber with low melting point
US12194930B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2020 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Oct 18, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2505/12
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A sound-absorbing air duct for a vehicle includes a lower non-woven fabric and an upper non-woven fabric sandwiching wires therebetween; and a film made of a polyester resin having a low melting point and disposed on the upper non-woven fabric, wherein each of the lower and upper non-woven fabrics includes a mixture between a first polyester fiber containing a polyester resin having a melting point higher than 250° C. and a second polyester fiber containing a polyester resin having a low melting point and having a softening point of 100° C. to 150° C., wherein the second polyester fiber includes a polyester resin having a low melting point composed of: an acid component including terephthalic acid or an ester-forming derivative thereof; and a diol component including 2-methyl-1,3-propanediol, 2-methyl-1,3-pentanediol, and ethylene glycol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.