Low mass acoustically enhanced floor carpet system
View Patent ↗A low mass acoustically enhanced floor carpet system for vehicles. In a first embodiment, the carpet assembly comprising a face layer and an opposite lower fiber mat. The carpet assembly further including a primary backing if the face layer is tufted, a back coating layer, an upper fiber mat, and a perforated film layer all in between the face layer and the lower fiber mat. The perforated film layer providing for enhanced sound absorption. In an alternate embodiment, the carpet assembly comprising a face layer, an insulator pad opposite the face layer; a back coating, a perforated film layer, and an insulator pad all between the face layer and the insulator pad.
1. An acoustically enhanced carpet system comprising:
a face layer comprising tufted yarn;
a primary backing fiber blend mat disposed adjacent to the face layer;
a back coating layer disposed adjacent the primary backing, said back coating layer interlocked with the tufted yarn to prevent the face layer from becoming separated from the primary backing;
a thermoplastic film layer defining a plurality of perforations that form a regular perforation pattern, said film layer coupled to the backing coating layer, said film layer being between 1.0-4.5 mm thick; and
an insulator pad disposed adjacent the film layer, wherein said film layer has a surface area and said perforations comprise less than 20% of said surface area of said film layer.
2. The carpet assembly of claim 1 wherein said film layer is an adhesive film for bonding.
3. The carpet assembly of claim 1 wherein said film layer is comprised of one of a polyamide, a polyethylene, and a polyester.
4. The carpet assembly of claim 1 wherein said perforations are substantially circular.
5. The carpet assembly of claim 1 wherein said perforation pattern provides acoustic absorption in the low to mid frequency ranges of 1000-3000 Hz.
6. The carpet assembly of claim 1 wherein said face layer is comprised of one of a polyester and a terephthalate (PET).
7. The carpet assembly of claim 1 wherein said face layer is tufted and comprised of one of a tufted nylon and a tufted PET.
8. The carpet assembly of claim 1 wherein said primary backing is comprised of one of a nylon, PET and a synthetic yarn.
9. The carpet assembly of claim 1 wherein said face layer has a face weight between 280-450 g/sq.m.
10. The carpet assembly of claim 1 wherein said back coating is one of a latex, a frothed polyethylene, an acrylic latex.
11. The carpet assembly of claim 1 wherein said back coating is under 340 g/sq.m.
12. A lightweight carpet assembly for improving acoustic absorption comprising:
a face layer comprising tufted yarn;
an insulator pad opposite said face layer;
a back coating in between said face layer and said insulator pad; and
a thermoplastic film layer in between said face layer and said insulator pad, said film layer defining a plurality of perforations that form a regular perforation pattern, wherein said film layer has a surface area and said perforations comprise less than 20% of said surface area of said film layer.
13. The carpet assembly of claim 12 wherein said film layer is an adhesive film for bonding and is comprised of one of a polyamide, a polyethylene, and a polyester.
14. The carpet assembly of claim 12 wherein said face layer is comprised of one of a tufted nylon and a tufted PET on a primary backing and wherein said back coating secures said one of a tufted nylon and a tufted PET to said primary backing.
15. The carpet assembly of claim 12 wherein said insulator pad is comprised of a needled fleece that when placed upon one of a nonwoven polyester and a PET surface provides an anti-slip feature.