Heat resistant coating for use in airbags and methods of their manufacture

摘要

A heat shield is generally provided, along with methods of making the heat shield and its use in a vehicle safety device (e.g., an airbag). In one embodiment, the heat shield includes a base substrate (e.g., a nonwoven fabric, a woven fabric, or a film); a heat resistant coating on the base substrate; and a first point-bonded sheet laminated to the heat resistant coating such that the first point-bonded sheet forms an outer surface of the heat shield with the heat resistant coating positioned between the first point-bonded sheet and the base substrate. The heat resistant coating generally comprises particles of an inorganic mineral (e.g., vermiculite, mica, or a combination thereof) dispersed within a film-forming binder (e.g., an acrylic resin, a styrene-butadiene rubber, a polyvinyl alcohol, an ethyl vinyl acetate resin, a phenolic resin, or a combination thereof).

主权项

1. A vehicle safety device, comprising:
an airbag comprising a base fabric and forming an interior space, wherein the airbag defines an aperture; a pyrotechnic device positioned within working proximity to the aperture defined in the airbag, wherein the pyrotechnic device is configured to fill the interior space of the airbag with a gas upon ignition; and a heat shield positioned within the interior of the airbag and proximate to the aperture, wherein the heat shield comprises:
a base substrate;a heat resistant coating on the base substrate, wherein the heat resistant coating comprises particles of an organic material dispersed within a film-forming binder, wherein the organic material comprises vermiculite, mica, or a combination thereof; anda first point-bonded sheet laminated to the heat resistant coating such that the first point-bonded sheet forms an outer surface of the heat shield with the heat resistant coating positioned between the first point-bonded sheet and the base substrate, and wherein the heat shield is positioned such that the first point-bonded sheet faces the interior space of the airbag.