Vibration damping system
AssigneeThe Gill Corporation
InventorsHongbin Shen, Phu Nguyen
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Abstract
A reduced vibration structure comprises honeycomb and a vibration damping coating on at least a portion of the internal surface of at least a portion of the cells of the honeycomb. The vibration damping coating is formed by curing a coating composition comprising acrylic polymer or copolymer emulsion and a vibration damping filler. The structure can include an adhesive coupled to both the upper surface and the lower surface of the honeycomb and two pieces of sheathing coupled to the adhesive, one on the upper surface and one on the lower surface of the honeycomb.
Claims22
A structure comprising:
- a) a honeycomb having opposed surfaces and a plurality of open cells, each cell having an internal surface;
- and
- b) a vibration damping coating on substantially all of the internal surface of substantially all of the cells, the coating being formed by curing a coating composition comprising:
- (i) acrylic polymer or acrylic copolymer emulsion comprising polymeric particles;
- and
- (ii) a vibration damping filler,
- wherein weight ratio of vibration damping filler to polymeric particles is from 2:1 to 8:1 and wherein the structure comprises sufficient vibration damping coating that the structure satisfies at least one of the following criteria:
- a) sound transmission loss as measured by ASTM E90 is at least about 5 decibels as compared to the structure without the vibration damping coating;
- or
- b) vibrational damping loss factor as measured by ASTM E756 is at least about 0.05 as compared to the structure without the vibration damping coating;
- c) an adhesive coupled to both surfaces of the honeycomb;
- d) a first piece of sheathing coupled to the adhesive coupled on one of the surfaces of the honeycomb;
- and
- e) a second piece of sheathing coupled to the adhesive coupled to the other surface of the honeycomb.
A structure comprising:
- a) a honeycomb having opposed surfaces and a plurality of open cells, each cell having an internal surface;
- and
- b) a vibration damping coating on at least a portion of the internal surface of at least a portion of the cells, the coating being formed by curing a coating composition comprising:
- (i) acrylic polymer or acrylic copolymer emulsion comprising polymeric particles;
- and
- (ii) a vibration damping filler,
- wherein weight ratio of vibration damping filler to polymeric particles is from 2:1 to 8:1 and wherein the structure comprises sufficient vibration damping coating that sound transmission loss as measured by ASTM E90 is at least about 5 decibels as compared to the structure without the vibration damping coating.
A structure comprising:
- a) a honeycomb having opposed surfaces and a plurality of open cells, each cell having an internal surface;
- and
- b) a vibration damping coating on at least a portion of the internal surface of at least a portion of the cells, the coating being formed by curing a coating composition comprising:
- (i) acrylic polymer or acrylic copolymer emulsion comprising polymeric particles;
- and
- (ii) a vibration damping filler,
- wherein weight ratio of vibration damping filler to polymeric particles is from 2:1 to 8:1 and wherein the structure comprises sufficient vibration damping coating that vibrational damping loss factor as measured by ASTM E756 is at least about 0.05 as compared to the structure without the vibration damping coating.
Dependencies are inferred from the claim text.