Systems, devices and methods of making prosthetic implants having self-sealing membranes for closing punctures and preventing leaks

A breast tissue expander comprising:

• an outer shell having an injection port;
• a self-sealing membrane surrounding the injection port, the self-sealing membrane having a three-layer construction comprising:
• a middle layer of an elastomeric material having first and second major surfaces;
• a first outer layer of an elastomeric material overlying the first major surface of said middle layer;
• and
• a second outer layer of an elastomeric material overlying the second major surface of said middle layer, wherein the middle layer is stretched prior to forming the three-layer construction such that the three-layer construction is movable from a stretched configuration to a released configuration, wherein, in said released configuration, said middle layer of said elastomeric material holds said first and second outer layers of said elastomeric material in contraction.

A method of making a self-sealing membrane for a prosthetic device comprising:

• applying tension to a first layer of a cured elastomeric material to stretch said first layer;
• applying tension to a second layer of a cured elastomeric material to stretch said second layer;
• while said first layer and the second layer remains stretched, positioning a third layer of an uncured elastomeric material between the first layer and the second layer by applying the third layer over a first major surface of said first layer and over a first major surface of said second layer;
• at least partially curing said third layer of said elastomeric material;
• and
• after said third layer is at least partially cured, releasing the tension from said first layer and said second layer, wherein said first layer and said second layer each returns to a released configuration for holding said middle layer in contraction.

A breast tissue expander comprising:

• an outer shell having an injection port;
• a first self-sealing membrane surrounding the injection port, the first self-sealing membrane having a three-layer construction comprising:
• a middle layer of an elastomeric material having first and second major surfaces;
• a first outer layer of an elastomeric material overlying the first major surface of said middle layer;
• and
• a second outer layer of an elastomeric material overlying the second major surface of said middle layer, wherein the first outer layer and the second outer layer are stretched prior to forming the three-layer construction such that the three-layer construction is movable from a stretched configuration to a released configuration, wherein, in the released configuration, said first and second outer layers of the elastomeric material holds the middle layer of the elastomeric material in contraction.