Absorbent body with semipermeable membrane
First Claim
1. An absorbent body for absorbing a fluid from a fluid-discharging region, comprising:
- an absorbent layer adapted to absorb said fluid;
a jacket which is positioned immediately to contact with said absorbent layer, at least a portion of the jacket which is facing said absorbent layer been made of a micro-porous semi-permeable membrane film, which is permeable to said fluid discharged from said fluid-discharging region and absorbed by said absorbent layer, the remainder of said jacket being made of a liquid-tight material;
a fluid absorbent substance causing osmotic activity being enclosed in said jacket and adapted to absorb said fluid, said membrane film being non-permeable to said fluid-absorbing substance;
said semi-permeable membrane being liquid-tight when the osmotic pressure differential across said membrane is zero and being permeable to said fluid due to an osmotic pressure differential across said membrane.
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Accused Products
Abstract
Absorbent body consisting of a fluid-absorbing substance (1) which is enclosed in a jacket (2,5), and outside the jacket a fluid-absorbing layer (3), e.g. cellulose wadding, at least on the portion of the jacket intended to face the fluid-discharging region, and possibly outside this layer a wound-protecting layer (4), at least a portion (2) of the jacket, which is in contact with the absorbent layer (3), being made of a semipermeable membrane film which is permeable to the fluid discharged from the fluid-discharging region but which is not permeable to the fluid-absorbing substance, the remainder of said jacket (5) consisting of a liquid-tight material.
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Citations
23 Claims
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1. An absorbent body for absorbing a fluid from a fluid-discharging region, comprising:
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an absorbent layer adapted to absorb said fluid; a jacket which is positioned immediately to contact with said absorbent layer, at least a portion of the jacket which is facing said absorbent layer been made of a micro-porous semi-permeable membrane film, which is permeable to said fluid discharged from said fluid-discharging region and absorbed by said absorbent layer, the remainder of said jacket being made of a liquid-tight material; a fluid absorbent substance causing osmotic activity being enclosed in said jacket and adapted to absorb said fluid, said membrane film being non-permeable to said fluid-absorbing substance; said semi-permeable membrane being liquid-tight when the osmotic pressure differential across said membrane is zero and being permeable to said fluid due to an osmotic pressure differential across said membrane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification