Abstract:
Disclosed herein are a granulocyte adsorbing carrier which is provided on its surface with irregularities having a center line average height Ra of 0.2 to 10 .mu.m and a mean spacing Sm of unevenness being within a range of 5 to 200 .mu.m, and a granulocyte remover employing the granulocyte adsorbing carrier.
Abstract:
A method of making a granulocyte adsorbing carrier, which is provided on its surface with irregularities having a center line average height Ra of 0.2 to 10 .mu.m and a mean spacing Sm of unevenness being within a range of 5 to 200 .mu.m, and a granulocyte remover employing the granulocyte adsorbing carrier, is conducted by methanol extraction.
Abstract:
The present invention is directed to a multi-ply unfilled microporous sheet product composed of at least one first ply and at least one second ply which are, respectively, formed from polymeric compositions having different rheological properties and to a method of forming said sheet product.
Abstract:
A bottle crushing machine having a feed chamber, at the bottom of which is located a crusher disk. The disk includes a set of beater bars extending upward into the feed chamber to intercept falling bottles and initially shatter them. Near the surface of the disk are cross bars that further crush the glass fragments. The disk is situated in a portion of the feed chamber under the upper surface of an expanded portion of the chamber. The only route for glass fragments to exit the chamber is between the disk and the upper surface of the expanded portion, between the side walls of the expanded portion and the outer edge of the disk, to an area below the disk. By relative movement of the disk in the vertical direction, the gap between the disk and the upper surface will be varied, adjusting the size of fragments that are created.
Abstract:
Microporous material comprises: (1) a matrix comprising a mixture of substantially linear ultrahigh molecular weight polyethylene having an intrinsic viscosity of at least about 10 deciliters/gram and lower molecular weight polyethylene having an ASTM D 1238-86 Condition E melt index of less than about 50 grams/10 minutes and an ASTM D 1238-86 Condition F melt index of at least 0.1 gram/10 minutes, (2) a large proportion of finely divided water-insoluble siliceous filler, and (3) interconnecting pores wherein the weight percent of the ultrahigh molecular weight polyethylene in the total polyethylene of the matrix and the filler/matrix weight ratio are within the polygon ABCDEF of FIG. 6 of the drawings.
Abstract translation:微孔材料包括:(1)包含特性粘度为至少约10分升/克的基本上线性的超高分子量聚乙烯和具有ASTM D 1238-86条件E熔融指数小于或等于10分升/克的低分子量聚乙烯的混合物的基体 约50克/ 10分钟,ASTM D 1238-86条件F熔融指数为至少0.1克/ 10分钟,(2)大部分细分散的水不溶性硅质填料,和(3)互连孔,其中重量 超高分子量聚乙烯在基体的总聚乙烯中的百分比和填料/基质重量比在图3的多边形ABCDEF内。 6图。
Abstract:
Method of producing a single-phase composite structure of filamentary and non-filamentary semicrystalline morphology made from the same polymer, which is of a type capable of gelling in a suitable solvent and of being deformed into a high-modulus, high-strength product. Layers of the polymer in sheet form are interleaved with at least one layer, also of that polymer, made from filaments thereof. The method of making the product may involve heating a sheet of UHMWPE or other polymer gel (5% UHMWPE in 95% paraffin oil, by weight) to 125.degree. C., applying a knitted UHMWPE high modulus, high-strength structure on one side thereof, extracting the non-volatile paraffin oil therefrom with hexane, and evaporating the hexane.
Abstract:
A microporous polyolefin shaped article is provided. The article comprises a polyolefin substrate of substantially uniform thickness having a patterned surface, the patterned surface providing substantially skinless areas having high microporosity and skinned areas of reduced microporosity. A method for preparing the article is also provided.
Abstract:
Particles which enclose cavities can be produced by adding a water-insoluble solid, liquid or gaseous cavity generating compound to an aqueous solution of a matrix material. Subsequent to forming particles by dispersion in a water-insoluble dispersion medium, the matrix is rendered insoluble in water by cooling, by covalent cross-linking or by polymerization. The cavity generating compound is washed out, whereafter the particles can be used as ion exchangers in gel filtration processes, in hydrophobic chromatography or in affinity chromatography, optionally subsequent to derivatizing the particles. The particles can also be used to advantage as microcarriers in the cultivation of anchorage dependent cells.
Abstract:
A method of manufacture of flat permeable membrane comprises the steps of mixing a polyolefin, an organic filler uniformly dispersible in the polyolefin in the molten state, and crystal seed forming agent for the polyolefin; discharging the resultant mixture in the molten state through a die; bringing one surface of the discharged molten membrane into contact with a cooling roll; placine the cooled and solidified flat membrane into contact with an extractant capable of dissolving and extracting the organic filler and capable of dissolving the polyolefin; and subjecting the cooled and solidified flat membrane in a fixed state in longitudinal and lateral directions to a heat treatment at a temperature 20.degree. to 50.degree. C. lower than the melting point of the polyolefin.
Abstract:
A process for producing a relatively thick microporous ultra-high-molecular-weight polyolefin membrane, including the steps of: (1) preparing a solution of an ultra-high-molecular-weight polyolefin having a weight-average molecular weight of 5.times.10.sup.5 or more; (b) extruding the solution from a die while rapidly cooling it in advance to its gelation temperature or below, thereby forming a gel-like sheet; (c) removing at least 10 wt % of the solvent from the gel-like sheet so that the gel-like sheet contains 10 to 90 wt % of the ultra-high-molecular-weight polyolefin; (d) stretching the gel-like sheet at a temperature equal to or lower than that which is 10.degree. C. above the melting point of the ultra-high-molecular-weight polyolefin; and (e) removing the residual solvent from the stretched product.