Body-contact interface structure with neutral internal adhesive interface
A plural-layer body-contacting protective and cushioning interface structure and an associated fabrication method. This structure has a body-facing side and a load-facing side. Intermediate these sides resides a moisture-impervious, gas-permeable, solvent-based barrier layer, and within that barrier layer, an acceleration-rate-sensitive cushioning core structure formed of plural, interfacially bonded core layers. A water-based adhesive is employed to bond the core layers, and this adhesive is incompatible with the solvent upon which the barrier layer is based.
1 . A layered, body-protective, cushioning interface structure having a body-facing side and a load-facing side, said interface structure comprising
a plural-layer, viscoelastic, non-springy and acceleration-rate-sensitive core structure,
an adhesive bonding layer based upon a solvent having one character joining each next-adjacent layer of said core structure, and
a fully moisture-impervious, but gas-permeable, coating barrier layer which blocks completely any flow of moisture through the barrier layer, and which substantially fully envelops the entirety of said core structure and said bonding layer, said barrier layer being formed of a material which is based upon another solvent having another character, with the respective solvencies of said bonding layer and of said barrier layer being incompatible.
2 . The interface structure of claim 1 , wherein said solvent having said one character is water-based, and said solvent having said other character is acetone-based.
3 . A method of fabricating a layered, body-protective cushioning interface structure having a body-facing side and a load-facing side, said method comprising
providing at least a pair of viscoelastic, non-springy, acceleration-rate-sensitive core layers
facially bonding these two core layers using curable and initially wet, flowable adhesive which is based upon a solvent of one character, and thereafter
completing the fabrication by the application of a curable, and initially wet, flowable barrier-layer material to form a fully moisture-impervious but gas-permeable coating barrier layer which substantially completely encloses the bonded core layers.
4 . The method of claim 3 , wherein said bonding is performed utilizing a water-based adhesive, and forming of the barrier layer is performed utilizing an acetone-based barrier-layer material.