Semipermeable capillary having overlapped strengthening layer
AssigneeStork Friesland B.V.
InventorCasper Johannes N. Rekers
Life of this patent
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Abstract
Described is a semipermeable capillary having a tubular semipermeable wall composed of a membrane-forming material (2) and a tubular strengthening layer (1). The tubular strengthening layer includes an elongated tape having mutually overlapped longitudinal edges. The tubular strengthening layer has an open cohesive structure that is embedded in the membrane-forming material whereby the mutually overlapping longitudinal edges are joined together by the membrane-forming material and a continuous phase is formed between the semipermeable wall and the strengthening layer.
Claims3
A semipermeable capillary comprising the following:
- a tubular strengthening layer composed of at least one elongated tape having longitudinal edge sections, said tape being converted into a tubular shape with at least said longitudinal edge sections mutually overlapping;
- and
- a tubular semipermeable wall composed of membrane-forming material supported by said strengthening layer;
- in which said capillary has a fine bore permitting capillarity and has an internal diameter smaller than or equal to 5 mm, and
- in which said mutually overlapping edge sections have an overlap greater than, or equal to 90°;
- said mutually overlapping edge sections having been joined together by said membrane-forming material in a simultaneous formation process as the formation of and joining with said strengthening layer of said semipermeable wall by said same membrane-forming material,
- wherein said tape has an open cohesive structure which is embedded in the membrane-forming material and wherein a continuous phase is formed between the semipermeable wall and the strengthening layer.
A semipermeable capillary comprising the following:
- a tubular strengthening layer composed of at least one elongated tape having longitudinal edge sections, said tape being converted into a tubular shape with at least said longitudinal edge sections mutually overlapping;
- and
- a tubular semipermeable wall composed of membrane-forming material supported by said strengthening layer;
- in which said capillary has a fine bore permitting capillarity and has an internal diameter smaller than or equal to 5 mm, and
- said mutually overlapping edge sections having been joined together by said membrane-forming material in a simultaneous formation process as the formation of and joining with said strengthening layer of said semipermeable wall by said same membrane-forming material,
- wherein said tape has an open cohesive structure which is embedded in the membrane-forming material and wherein a continuous phase is formed between the semipermeable wall and the strengthening layer.
Dependencies are inferred from the claim text.