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(11) | EP 0 198 679 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Flexible, water-impermeable mattress |
(57) A bed insert comprising a flexible, water-impermeable blister film comprising a first
plastic sheet (1) having substantially cylindrical recesses (2) and a second plastic
sheet (3) bonded to the first sheet (1) such that the second sheet seals the recesses
of the first sheet to form gas-filled blisters (4), the total area of the bases of
the gas-filled blisters amounting to 45 to 92% of the total area of the blister film.
The first sheet and preferably also the second sheet are formed from a thermoplastic
material comprising polyethylene and chlorinated polyethylene. |