An elastomer molded body for a medical device includes an elastomer portion and a filler. The elastomer portion contains a crosslinked fluorine-based elastomer. The filler is formed from a plurality of particles each of which has aspect ratio of 5 or more and specific surface area of 3 m.sup.2/g or more and 10 m.sup.2/g or less. The aspect ratio is defined as a ratio of a dimension in a long axis direction thereof to a dimension in a short axis direction thereof. The filler has an uneven distribution in a surface layer part of the elastomer portion and is oriented in a direction along a surface of the elastomer molded body.

An elastomer molded body for a medical device includes an elastomer portion and a plurality of silica particles. The elastomer portion contains a fluorine-based elastomer. The plurality of silica particles are more densely distributed in outside of a center portion of the elastomer portion than inside of the center portion, such that at least some of the plurality of silica is exposed to a surface of the elastomer portion.

This invention relates to a composite material which is a copolymer of at least (i) a functionalised carbon nanoparticle, (ii) a polyol, (iii) a compound comprising at least two isocyanate groups, wherein the functionalised carbon nanoparticle and the polyol are covalently bonded by a urethane and optionally a urea and/or an amide linkage, and a process for producing the same. Such composite materials are suitable for use in moulded articles for implantation within a mammal.

New stretchable electrically conductive composite materials comprising at least one polymer and a plurality of nanoparticles are provided, which exhibit high conductivity even at high strain levels. The composite may comprise polyurethane as the polymer and spherical gold nanoparticles. Such materials have conductivity levels as high as 11,000 Scm.sup.1 at 0% strain and 2,400 Scm.sup.1 at 110% strain. Furthermore, certain embodiments of the composite have a maximum tensile strain of 480% while still exhibiting conductivity of 35 Scm.sup.1. The inventive materials are highly flexible, highly conductive and suitable for a variety of applications, especially for advanced medical devices, implants, and flexible electronics. The disclosure also provides methods of making such stretchable electrically conductive nanocomposites, including formation by layer-by-layer and vacuum assisted flocculation. In certain embodiments, stretchable chiral plasmonic composite materials for use as optic devices and methods for making them are provided.

The present disclosure discloses a composite tubular material and a preparation method thereof. The tubular material is prepared from extracellular matrix and directionally arranged synthetic polymer fibers through compounding; the synthetic polymer fibers serve as an internal skeleton, a fiber diameter ranges from 1 m to 2000 m, a fiber angle ranges from 0 to 180, and a wall thickness ranges from 1 m to 1000 m; and extracellular matrix components are obtained from human or animal tissue through decellularization. According to the present disclosure, the tubular material with bioactivity and excellent mechanical properties can be prepared from the synthetic polymer and the natural material extracellular matrix through compounding; the synthetic polymer fibers with controllable fiber angle and diameter serve as the internal skeleton of the tubular material, and accordingly the tubular material has the mechanical properties of resistance to bending and squeezing.

The present disclosure discloses a composite tubular material and a preparation method thereof. The tubular material is prepared from extracellular matrix and directionally arranged synthetic polymer fibers through compounding; the synthetic polymer fibers serve as an internal skeleton, a fiber diameter ranges from 1 m to 2000 m, a fiber angle ranges from 0 to 180, and a wall thickness ranges from 1 m to 1000 m; and extracellular matrix components are obtained from human or animal tissue through decellularization. According to the present disclosure, the tubular material with bioactivity and excellent mechanical properties can be prepared from the synthetic polymer and the natural material extracellular matrix through compounding; the synthetic polymer fibers with controllable fiber angle and diameter serve as the internal skeleton of the tubular material, and accordingly the tubular material has the mechanical properties of resistance to bending and squeezing.

Thermoplastic elastomer compositions can be used for medical skin contact applications, comprising: a) 90.9 to 69.0 wt.-% star-shaped block copolymer A with 4 arms of the general structure [S.sub.1(S/B).sub.k(S/B).sub.l(S/B).sub.mS.sub.2].sub.nX, where S.sub.1 and S.sub.2 are vinylaro-matic hard polymer and S/B are soft random vinylaromatic/diene copolymer blocks; X is a coupling center; and b) 9.1 to 31.0 wt.-% of a plasticizer B: b 1) a mixture of mineral oil B1 and cyclohexane 1,2-dicarboxylic acid C.sub.8 to C.sub.10 dialkyl ester B2; or b2) a mixture of mineral oil B1 and vegetable oil B3.

A plurality of structural layers having different properties are nested together to form the medical balloon. Certain embodiments include at least one layer comprising a fiber-reinforced polymer. The layers of the balloons can slide relative to one another in use. A structural layer may comprise metal reinforcing fibers suspended in a polymer matrix.

The present invention disclosed a process to coat the surface of flexible polymeric implant with biocompatible polymer such that the coating does not crack when the implant is subjected to mechanical forces such as tension, torsion or bending while retaining the inherent properties of the coated polymer.

The present invention disclosed a process to coat the surface of flexible polymeric implant with biocompatible polymer such that the coating does not crack when the implant is subjected to mechanical forces such as tension, torsion or bending while retaining the inherent properties of the coated polymer.