What is claimed is:
1. A hollow fiber membrane made of an ethylene-vinyl alcohol polymer, comprising a dense layer existing in the inner surface and a porous layer existing in the layer other than the dense layer, wherein said hollow fiber membrane has a porosity of 60 to 90%, an overall mass transfer coefficient for myoglobin in a water-based system of not less than 0.003 cmmin., and a rejection rate for albumin in a bovine blood system of not less than 97%.
2. The hollow fiber membrane according to claim 1, wherein the clearance for urea in a bovine blood system is not less than 175 mLmin and the clearance for 2-microglobulin is not less than 35 mLmin per membrane area of 1.6 m2 at a blood flow rate of 200 mLmin and a dialysate flow rate of 500 mLmin.
3. The hollow fiber membrane according to claim 1 or 2, wherein said hollow fiber membrane has a rate of pore area of not less than 30% at the depth of 1 m from the inner surface, and a diameter of a nodule forming the dense layer of 5 to 50 nm.
4. A process for producing a hollow fiber membrane made of an ethylene-vinyl alcohol polymer, comprising the steps of extruding a dope for forming a membrane comprising an ethylene-vinyl alcohol polymer and a solvent from a double annular nozzle, with pouring a hollow forming agent in the internal side of the double annular nozzle, the dope being transparent and homogeneous at a high temperature but inducing phase separation when its temperature is lowered, passing the hollow fiber membrane extruded from the double annular nozzle through the air, and thereafter introducing the hollow fiber membrane into a water bath, wherein a temperature ( C.) of the dope for forming a membrane (TD), a temperature ( C.) for phase separation (LST) and a temperature ( C.) of the air through which the hollow fiber membrane extruded from the double annular nozzle is passed (TA) satisfy the following relationships:
5LST40,
TDLST20, and
TALST.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A bedding skirt configured to be rapidly inserted upon a ferrous material mattress frame, the bedding skirt comprising:
a front panel sufficiently long to hang from the ferrous material mattress frame to ground;
a back panel mechanically coupled to the front panel and sufficiently long to hang from the ferrous material mattress frame to the ground;
a plurality of magnets sewn between the front panel and the back panel such that the front panel and the back panel entirely surround each magnet and the plurality of magnets operate to adhere the bedding skirt to the ferrous material mattress frame;
wherein the bedding skirt is configured to be rapidly connected to the ferrous material mattress frame for use and rapidly removed from the ferrous material mattress frame for cleaning; wherein an upper portion of the front panel is mechanically coupled to a stretch fabric which further holds the bedding skirt to the mattress frame.
2. The bedding skirt of claim 1, wherein the stretch fabric is a two-way stretch fabric that stretches in one direction from selvedge to selvedge.
3. The bedding skirt of claim 1, wherein the front panel is mechanically coupled to the plurality of magnets.
4. The bedding skirt of claim 1, wherein the plurality of magnets are spaced at a twelve inch interval.
5. The bedding skirt of claim 1, wherein the plurality of magnets are neodymium magnets.