Abstract:
The present invention provides a flowable material container assembly having a membrane tube disposed coaxially within a port tube. The membrane tube has an outer layer, a core layer, and an inner layer. The outer layer is a blend of a polyolefin and a thermoplastic elastomer. The core layer is a blend of a polyolefin and a thermoplastic elastomer. The inner layer is a blend of a polyolefin, a radio frequency susceptible polymer, and a thermoplastic elastomer.
Abstract:
The present invention provides a method for assembling a medical device using solvent bonding techniques. The method includes the steps of: (1) providing a first article of a polymer composition having (a) a first component of a homopolymer or copolymer obtained using monomers of cyclic olefin or a bridged polycyclic hydrocarbon, the first component being present in an amount from about 30% to about 100% by weight of the composition and (b) a second component from 0-70% by weight of the composition; (2) providing a second article of a material selected from the group of low crystallinity polymers; (3) applying a solvent to one of the first article or the second article to define an interface area; and (4) bonding the first article to the second article along the interface area.
Abstract:
The present invention provides a method for fabricating flexible medical tubings comprising the steps of providing a tubing of a polymer material, the tubing having a longitudinal axis and an initial diameter, orienting the tubing along the longitudinal axis of the tubing to reduce the diameter of the tubing to define a oriented diameter, and applying heat to the oriented tubing to heat set the tubing to maintain dimensional stability of the tubing over a temperature to which the tubing will normally be exposed.
Abstract:
A multi-layer, flexible, gas-permeable film (10) suitable for forming a cell culture container (20), the film (10) comprising a first layer (12) composed of a polystyrene having a thickness within the range of 0.0001 inches to about 0.0010 inches and, a second layer (14) adhered to the first layer (12) composed of a polymer material having a thickness within the range of 0.004 inches to about 0.025 inches.
Abstract:
A polymeric tubing having an initial diameter and suitable for connecting to rigid housings including a sidewall defining a fluid pathway and having a longitudinal axis, the sidewall of a polymeric material in an amount by weight within the range of 99.999%-90.0%, and an additive in an amount by weight within the range of 0.001%-10%, and wherein the tubing has been oriented along its longitudinal axis to decrease its diameter to define a oriented diameter.
Abstract:
The invention provides a flexible plastic formulation capable of being RF sealed, extruded, cast or blow-molded, gas, steam and radiation sterilized. The plastic formulation of the invention comprises: a) from about 40 to about 90 percent by weight of a polyolefin polypropylene based material; b) from about 3 to about 25 percent by weight of a functionialized block copolymer, the functionalized block copolymer consisting essentially of a central block copolymer molecule including generally equal proportions of ethylene and butylene units, and terminal blocks of polystyrene; and c) from about 3 to about 20 percent by weight a nylon. The plastic formulations of the invention are useful in the manufacture of blood bags, tubing and the like.
Abstract:
A method is provided for creating a plastic component constructed, at least in part, from polychlorotrifluoroethylene, having improved properties. The method creates a component from a composition that has polychlorotrifluoroethylene, heats the component to a temperature that is greater than the melting point of the composition, and rapidly quenches the component in a cold medium.
Abstract:
An improved method and apparatus for direct-acting dynamic mechanical analysis that accomodates sample distortion due to environmental (e.g., temperature) variation.
Abstract:
Multiple component polymer compositions for fabrication into articles. In particular, polymeric compositions comprising a heat resistant polymer; a radio frequency (“RF”) susceptible polymer; a compatibilizing polymer; the composition having physical properties within a range a =70%; c 1.0; e =0.05; h
Abstract translation:用于制造成物品的多组分聚合物组合物。 特别地,包含耐热聚合物的聚合物组合物; 射频(“RF”)敏感聚合物; 相容聚合物; 所述组合物具有在<40,000psi范围内的物理性质; b> = 70%; c <30%; d> 1.0; e <0.1%; f <0.1%; g> = 0.05; h <= 60%; i = 0; 其中:a是根据ASTM D-882测量的组合物的机械模量; b是初始20%变形后组合物的长度恢复百分比; c根据ASTM D-1003,组合物的光学雾度为9密耳厚度; d是在熔体处理温度下测量的组合物在1Hz下的损耗角正切; e是组合物重量的元素卤素含量; f是组合物的低分子量水溶性级分; g是组合物在1至60MHz之间的介电损耗和25至250℃的过温度; 在121psi下测量样品蠕变,对于在27psi负载下的组合物的1英寸条; 并且,i表示组合物在以约20英寸(50cm)/分钟的中等速度应变至约100%伸长率(原始长度的两倍)和应变增白(由1表示)或缺乏的应变之后不显示应变增白 (由0表示)。
Abstract:
The present invention provides a method for fabricating a medical tubing. The method includes the steps of: (1) providing a material selected from the group consisting of ethylene homopolymers and ethylene copolymers, wherein the ethylene copolymers are obtained by copolymerizing ethylene with a comonomer selected from the group consisting of lower alkyl olefins, lower alkyl esters of a carboxylic acid and lower alkene esters of a carboxylic acid, the lower alkyl and lower alkene each have from 3-18 carbons, or blends thereof; (2) providing an extruder with an extrusion die; (3) extruding the material into a medical tubing; (4) providing a surface modifier solution; (5) preheating the surface modifier solution to a temperature within the range of 50-80° C.; and (6) applying the preheated solution onto the tubing at it exits the extrusion die when the tubing is in a molten state or a semi-molten state.