摘要:
A laminate comprising at least a surface layer (I) and an adjacent layer (II) thereto, characterized in that the surface layer (I) comprises a cross-linked copolymer formed by cross-linking a copolymer prepared by using as monomers at least one vinyl aromatic compound and at least one conjugated diene compound, and the adjacent layer (II) comprises a hydrogenated copolymer formed by hydrogenating a copolymer prepared by using as monomers at least one vinyl aromatic compound and at least one conjugated diene compound; a multilayer tube comprising the laminate; and a medical device comprising the laminate, and/or the multilayer tube.
摘要:
A multi-layered tube composed of at least two layers, each formed from a different resin, e.g. resin (I) or resin (II). Resin (I) contains 5 to 40 mass % of a polypropylene resin and 95 to 60 mass % of at least one hydrogenated copolymer. Resin (II) contains 45 to 100 mass % of a polypropylene resin and 55 to 0 mass % of a hydrogenated copolymer. The multi-layered tubes may be used in the field of medicine and provide tubing which is excellent in transparency, flexibility and anti-kinking properties, and which is durable during sterilization procedures with high-pressure steam. The multilayer tubing may also be safely disposed of as it generates no toxic gases, such as dioxin, when incinerated. The multilayered tubing has excellent connectability and may be bonded to other tubing using hot solvent bonding or solvent adhesion. The multilayered tubing which is free from generation of any toxic gas when incinerated, and which is excellent in hot solvent bonding or solvent adhesion to other tube.
摘要:
A blood collector includes a cylindrical body having a closed end and an open end, and a hollow body is arranged coaxially at the closed end of the cylindrical body and has a hole communicating with the interior of the cylindrical body. A columnar body is arranged within the cylindrical body to be in tight contact with an inner wall thereof, with a distal end defining a blood collection space with the closed end of the cylindrical body. Further, the columnar body has a hole which allows the blood collection space to communicate with the outside. A freeze-dried blood anticoagulant mass is placed inside the blood collection space to cover an inner surface of the closed end of the cylindrical body and to block the hole of the hollow body. A filter is arranged across the hole of the columnar body. The filter is permeable to gases and impermeable to blood at least before being brought into contact with blood in the collection space.
摘要:
Medical articles made of a resin composition comprising a polyvinyl chloride and a tetracarboxylic tetraester are provided. As examples of the tetracarboxylic tetraester are mentioned tetra(2-ethylhexyl) 3,3',4,4'-biphenylethertetracarboxylate, tetra(2-ethylhexyl) 3,3',4,4'-biphenylmethanetetracarboxylate, tetra(n-dodecyl) 2,3,3',4'-biphenyl-1,1-ethanetetracarboxylate, tetra(2-ethylhexyl) 3,3',4,4'-biphenyl-2,2-propanetetracarboxylate and the like. The tetracarboxylic tetraester is incorporated in an amount from 20 to 120, preferably from 30 to 100 parts by weight per 100 parts by weight of the polyvinyl chloride. As dissolution and migration to the surface of the article of the plasticizer tetracarboxylic tetraester are low in the medical articles, said medical articles produce no adverse effects upon body fluids such as blood when contacted. Examples of preferred medical articles are blood preservation vessels, catheters and blood transfusion sets.
摘要:
Irradiation-sterilizable medical articles molded from a propylene polymer composition in which stabilizers are incorporated. Said composition comprises from 0.01 to 0.4 part by weight of each of a specific hindered amine and a specific phenol or its phosphite ester compound incorporated per 100 parts by weight of a propylene polymer with a weight-average molecular-weight to number-average molecular-weight ratio of 5 or below. The above-mentioned composition may additionally contain a sorbitol derivative as the nucleating agent. Medical articles produced from said composition by molding, for example, syringes are suitable for irradiation sterilization. Said medical articles when irradiated undergo little reduction in quality of the material and are accompanied by little bleeding or degradation of the incorporated stabilizers and nucleating agent.
摘要:
An apparatus for separating blood is provided with a closed end and a thixotropic gel-like sealant with a specific gravity intermediate between the gravities of serum and clot phases. A cavity is formed on the upper surface of said sealant. The sealant consists essentially of an .alpha.-olefin-dimaleate copolymer having a viscosity from 10,000 to 120,000 c.p. (25.degree. C.), to which a viscosity-specific gravity adjusting agent is added to adjust the specific gravity to 1.035-1.055. The cavity is formed in such a size that diameter of the upper surface is from 0.15 to 0.7 times the inner diameter of the apparatus and its depth is from 0.13 to 0.65 times the thickness of said sealant.
摘要:
Polyvinyl chloride series resin compositions comprising 100 parts by weight of polyvinyl chloride series resin, 20 to 80 parts by weight of a plasticizer and 0.2 to 7 parts by weight of silicone oil, which minimize the elution of the plasticizer, and a method of manufacturing polyvinyl chloride series resin compositions which is characterized by emulsifying said silicone oil in advance with part of said plasticizer and adding an emulsion thus formed to said resin compositions.
摘要:
A blood collector comprising a collection container in the form of a tube having a forward end adapted for drawing of blood into the container and an opened rear end, a closure unit adapted for closing the opened rear end of the collection container, and a mechanism including a valving element for allowing passage of air when blood is flowing into said container and preventing passage of air and blood when said container is filled with blood, said valving element of said mechanism including an air passage and a filter member communicating with the air passage, said filter member comprising water insoluble but water-swellable polymeric material and provided at least at the contact portion of the closure member with collected blood. Air contained in the blood collecting space of the collection container is expelled through the valving element by the collected blood which rises to a desired level for expelling air from said space practically completely. As the blood contacts the water insoluble but water-swellable high polymeric material contained in filter member of the valving element, the material swells into gel body to block the air passage in the valving element connecting to outside of the collector. Thus blood analysis may be effected without influences by outside air and air otherwise contained in the blood collecting space.
摘要:
A porous hollow fiber membrane, comprising a polyolefin hollow fiber membrane of an annular cross section of substantial circle 150 to 300 .mu.m in inside diameter and 10 to 150 .mu.m in wall thickness, said hollow fiber membrane forming on the inner wall side thereof a tight layer of intimately bound fine polyolefin particles and on the outer wall side thereof a porous texture of fine polyolefin particles bound in chains and containing fine pores extended continuously form said inner wall side to said outer wall side.
摘要:
A medical solution transfusion circuit has a transparent cylindrical pumping body, a hard cap mounted on at least one end of said transparent cylindrical pumping body, and a flexible tube for communicating with said transparent cylindrical pumping body to transport a medical solution. The transparent cylindrical pumping body comprises a propylene/.alpha.-olefin copolymer.