Patent ID: 11932744
Assignee: EASTMAN KODAK COMPANY
Field: Other special machines (Mechanical engineering)
Classification: CPC C  D  E | IPC C  D  E

Claim 0:
1. A foamed, opacifying element comprising:
a substrate having a first opposing surface and a second opposing surface,
a single foamed opacifying layer disposed on the first opposing surface of the substrate, and an outermost nonfoamed functional composition disposed directly on the single foamed opacifying layer, wherein the single foamed opacifying layer comprises:
(a) at least 0.1 weight % and up to and including 80 weight % of nonporous polymeric particles having a porosity of less than 4 volume %, each nonporous polymeric particle having a mode particle size of at least 2 μm and up to and including 50 μm;
(b′) at least 10 weight % and up to and including 80 weight % of a matrix material that is derived from a (b) binder material having a glass transition temperature (Tg) of less than 40° C.;
(c) at least 0.0001 weight % and up to and including 50 weight % of two or more additives, at least one of these two or more additives being a foaming agent and another of these two or more additives being a foam stabilizing agent;
(d) less than 5 weight % of water; and
(e) at least 0.002 weight % of an opacifying colorant different from all of the two or more additives of (c), which opacifying colorant absorbs electromagnetic radiation having a wavelength of at least 380 nm and up to and including 800 nm,
all amounts being based on the total weight of the single foamed opacifying layer, and
the nonfoamed functional composition comprises at least (i) glass particles having an average particle size of at least 5 μm and up to and including 100 μm and a (iv) film-forming organic polymeric binder in an amount of at least 1 weight %, based on the total nonfoamed functional composition weight, in which the (i) glass particles are dispersed,
the nonfoamed functional composition being present at a dry coverage of at least 0.5 g/m2 and up to and including 10 g/m2.