Very high solid content aerosol delivery system
The present invention relates to a very high solid content contact adhesive (VHS) which has a higher solid content than previously thought attainable in the prior art without increasing the viscosity beyond operable levels. Additionally, the present invention provides a VHS application device which allows substantially more uniform application of the VHS than was previously attainable.
1. A very high solid content contact adhesive application nozzle adapted for use with an aerosol spray can, the nozzle comprising:
(a) an elongate body;
(b) an axial throughbore extending through the elongate body and being operably connected to a flow restrictor;
(c) the flow restrictor being a channel having a length and a rectangular shaped cross-section, and the flow restrictor further being operably connected to an exit port;
(d) the exit port being substantially rectangular in shape and comprising a pair of vertical opposing walls and a pair of horizontal opposing walls, wherein at least one of the pairs of walls flares outward from the flow restrictor to a nozzle exit end.
2. A very high solid content contact adhesive application nozzle according to claim 1 further comprising an insertion end, the insertion end being sized to fit into an aerosol can button.
3. A very high solid content contact adhesive application nozzle according to claim 1 wherein the pair of vertical opposing walls flares outward from the flow restrictor to the nozzle exit end.
4. A very high solid content contact adhesive application nozzle according to claim 1 wherein at least one of the pairs of walls flares outward at an angle in the range of about 20° to about 75°.
5. A very high solid content contact adhesive application nozzle according to claim 1 wherein at least one of the pairs of walls flares outward at an angle of about 45°.
6. A very high solid content contact adhesive application nozzle according to claim 1 wherein a ratio of a cross-sectional area of the axial throughbore to a cross-sectional area of the flow restrictor is about 4.7.