Abstract: A method of making the a multilayer, biaxially oriented, heat shrinkable thermoplastic film includes a layer having between 50 and 100 parts by weight ethylene/alpha-olefin C4-C12 copolymer, and between 0 and 50 parts by weight of a polymer selected from polyolefin, and modified polyolefin, the layer having more than one melting point when detected by diffential scanning calorimetry according to ASTM D-3418; wherein the total thickness variation in the multilayer film is lower than ±10%.

Abstract: The present invention discloses a method/system utilizing interaction of electromagnetic pulses or ultrasonic radiation with nano- and microparticles for enhancement of drug delivery in solid tumors. The particles can be attached to antibodies directed against antigens in tumor vasculature and selectively delivered to tumor blood vessel walls. Cavitation induced by ultrasonic waves or local heating of the particles by pulsed electromagnetic radiation results in perforation of tumor blood vessels, microconvection in the interstitium, and perforation of cancer cell membrane, and therefore, provides enhanced delivery of macromolecular therapeutic agents from blood into cancer cells with minimal thermal and mechanical damage to normal tissues.

Abstract: A polymer which can be crosslinked by high-energy radiation and contains from 0.1 to 50% by weight, based on the polymer, of 2,3-dihydrofuran groups or derivatives thereof, each calculated as 2,3-dihydrofuran.

Abstract: An object comprised of a curable material and formed by stereolithography or another three-dimensional prototyping method, in which the object has undergone initial curing, is subjected to post-curing by ionizing radiation, such as an electron beam having a predetermined beam output energy, which is applied in a predetermined dosage and at a predetermined dose rate. The post-cured object exhibits a property profile which is superior to that which existed prior to the ionizing radiation post-curing.

Abstract: A polymeric film includes at least one irradiated water soluble layer. A process for making a water soluble film includes the steps of extruding a water soluble film; and irradiating the water soluble film. Using electron beam irradiation, a water soluble film's solubility rate can be increased.

Abstract: A method and an apparatus for measuring an electric insulated conductor, in particular a medium-voltage and/or high-voltage insulated conductor, are proposed. Seen in profile cross-section, the insulated conductor (50) includes a copper conductor, an inner semiconductor, an insulation and an outer semiconductor and is produced in an extrusion device (90) having an appropriately assigned crosslinking section (40). To achieve an even distribution of the two semiconductor layers and of the insulation layer, the insulated conductor (50) is radiated through immediately at the outlet from the crosslinking section (40) and a correction of the die setting in the extrusion device is carried out by means of values thus determined.

Abstract: A process of making a biocampatible porous hollow fiber that is made of polyolefine material and is coated with a biocompatible carbon material is disclosed. The biocompatible hollow fiber produced can be used as exchange material, diaphragms and/or semipermeable membranes within devices which will contact blood or plasma outside of the living body. The coated fiber is produced by introducing a preformed porous hollow fiber into an atmosphere of gaseous monomer vinylidene chloride and subsequent induction, e.g. by gamma radiation, of a graft-polymerization reaction to form an uniform polyvinylidene chloride layer. The ultimate coating is formed after a dehydrochlorination reaction in which hydrogen chloride is removed from the layer. The dechlorination reaction is typically performed by treating the fiber with hot concentrated aqueous ammonia solution. The reaction can be continued to reduce the chlorine content of the coating to less than 6% of its original value.

Abstract: A method and an apparatus for an exact measurement of the thickness of a plurality of individual semi-conductor and insulation layers and the determination of the centricity/eccentricity of a medium-voltage and/or high-voltage insulated conductor. The individual semi-conductor and insulation layers of the insulated conductor emerging from an extrusion device are penetrated with X-rays in at least two directions laying within a plane orthogonal to the axis of the insulated conductor. On carrying out a line-scan intensity detection of the X-rays having penetrated the insulated conductor, the thickness of the individual layers as well as the position of the conductor is computed. These values are compared with target ones, and, if necessary, the position of the extruder heads can be corrected accordingly.

Abstract: A method of micromachining polytetrafluoroethylene by applying radiation light to the surface of polytetrafluoroethylene, includes the steps of: preparing a workpiece including a region made of polytetrafluoroethylene; preparing a mask having patterned areas substantially transmitting and not transmitting the radiation light; and applying the radiation light containing at least ultraviolet rays of a wavelength of 160 nm to a surface of the workpiece through the mask. Polytetrafluoroethylene can be microscopically processed, while obtaining a high aspect ratio and processing a large area with ease.

Abstract: A method for reducing discoloration in a discolored plastic material which has been subjected to sterilization by gamma radiation which includes exposing the plastic material to light having a wavelength within the range of 200 to 600 nm for a time sufficient to restore the original clarity. A sterilized pack for a medical device including plastic material in which the clarity has been restored by the method is also included.

Abstract: A female mold (2, 12, 22, 32, 42, 52, 62) having a desirable pattern is formed on a substrate (1, 11, 21, 31, 41, 51, 61). Next, ceramic material (3, 13, 23, 33, 43, 53, 63) is filled in spaces in the female mold. Thereafter, the female mold is removed by heating the entire substrate, whereby a desirable thick film pattern can be finely and easily formed. The inorganic paste material comprising inorganic liquid vehicle containing water glass as main ingredient and powdery solid dispersed in the inorganic liquid vehicle is used as the ceramic material. The volume change of the inorganic paste material is small during the drying and calcinating processes, thus the inorganic paste material is prevented from being broken.

Abstract: A process for producing a modified polypropylene having a very high melt tension and superior stiffness and moldability, and a molded product obtained by using the modified polypropylene are provided.which process includes adding 0.05 to 10 millimols of a cross-linking auxiliary to 100 g of a linear polypropylene, mixing them, irradiating ionizing radiations to the mixture so as to give an absorbed dosage of 1 to 20 kGy, and successively heat-treating the resulting material at 80.degree. to 350.degree. C.,which modified polypropylene has(A) a degree of branching of substantially 1,(B) a relationship between its melt tension (MS) at 230.degree. C. and its intrinsic viscosity (.eta.) measured in tetralin at 230.degree. C. expressed by an inequalitylog (MS)>4.24.times.log [.eta.]-0.915, and(C) a percentage of extraction residue in boiling xylene of 1% by weight or less.

Abstract: A normally solid, high molecular weight, gel-free, irradiated ethylene polymer is characterized by high melt strength due to strain hardening elongational viscosity, which is believed to be caused by free-end long chain branching of the molecular chains forming the polymer. The polymer is prepared by (1) irradiating a normally solid, high molecular weight ethylene polymer without strain hardening elongational viscosity while in the solid state in an environment in which the active oxygen concentration is less than 15% by volume, maintaining the irradiated material in this environment while in the solid state for a specific period of time, and then deactivating free radicals present in the material.

Abstract: Materials and items made of thermoplastic polyesters, such as poly (epsilon-caprolactone), synthetic rubber, such as Transpolyisoprene and Neoprene, and natural rubber, such as balata have improved properties when subjected to gamma radiation in the range from 0.5 to 30 megarads.

Abstract: A method for treating contact lenses involves irradiation of the contact lens with high energy radiation while immersed in an aqueous medium such as saline solution.

Abstract: A method and an apparatus for measuring an electric insulated conductor, in particular a medium-voltage and/or high-voltage insulated conductor, are proposed. Seen in profile cross-section, the insulated conductor (50) comprises a copper conductor, an inner semiconductor, an insulation and an outer semiconductor and is produced in an extrusion device (90) having an appropriately assigned crosslinking section (40). To achieve an even distribution of the two semiconductor layers and of the insulation layer, the insulated conductor (50) is radiated through immediately at the outlet from the crosslinking section (40) and a correction of the die setting in the extrusion device is carried out using the values thus determined.

Abstract: An intraluminal stent comprising fibrin treatment of restenosis is provided by a two stage molding process.

Abstract: A process for preparing an ignition resistant carbonaceous material by exposing a meltblown or spunbonded acrylic precursor material in the form of at least one ply of a generally planar fibrous web, matt or batt to ionizing radiation to crosslink said acrylic material which is then heat treated in an inert atmosphere to increase the carbon content of said irradiated material to form said carbonaceous material. The invention also resides in a continuous self bonded fibrous carbonaceous material having a carbon content of from about 65% to less than about 92%, an oxygen content of less than about 2%, and a specific resistivity of from about 10.sup.-1 to about 10.sup.-10 ohm-cm. Preferably said carbonaceous material has an oxygen content of less than about 1% and a nitrogen content of from about 5% to about 30%.

Abstract: A hollow, heat-recoverable article 1, for enclosing objects such as electronic components etc. has a thermoplastic lining on its interior surface and includes a fusion bonded portion 2 in which different parts of the article have been brought together and bonded by fusion of the lining with substantially no welding of the heat-recoverable material forming the wall. The lining has a melting point that is higher than the recovery temperature of the article, thereby enabling subsequent recovery of the article without rupture of the bonded portion.