Molded gas barrier parts for vacuum insulated structure
A vacuum insulated appliance structure includes a molded first layer of a first polymer material. A second layer of a second polymer material is molded to (e.g. over) at least a portion of the first layer, and a third layer of a third polymer material is molded to (e.g. over) at least a portion of the second layer to form a first component. At least one of the layers is impervious to one or more gasses. One or more additional components are secured to the first component to form a vacuum cavity. The vacuum cavity is filled with a porous material, and the vacuum cavity is evacuated to form a vacuum.
1. A vacuum insulated appliance structure, comprising:
a first component having first and third layers injection molded to opposite sides of a second layer;
wherein the first layer comprises a first thermoplastic polymer material;
wherein the second layer comprises a second thermoplastic polymer material, wherein the second thermoplastic polymer material is selected from the group consisting of EVOH and LCP;
wherein the third layer comprises a third thermoplastic polymer;
a second component secured to the first component to form a cavity therebetween;
porous filler material disposed in the cavity wherein the cavity is evacuated to form a vacuum;
wherein the first and third layers comprise materials selected from the group consisting of PVC, PET, HIPS, a co-polyester, and nylon; and
wherein the first and third layers form a substantially continuous one piece outer structure that completely encapsulates the second layer.
2. The vacuum insulated appliance structure of claim 1 , wherein:
the second component comprises a wrapper;
the first component comprises a trim breaker;
the vacuum insulated structure comprises a refrigerator cabinet or a refrigerator door and including:
a liner secured to the trim breaker, wherein the liner is spaced apart from the wrapper.
3. The vacuum insulated appliance structure of claim 2 , wherein:
at least one of the wrapper and the liner are metal.
4. The vacuum insulated appliance structure of claim 1 , wherein:
at least one of the first and third layers includes a surface and a structural reinforcement protruding from the surface.