摘要:
Continuous processing methods are used for making absorbable polymeric non-wovens, with anisotropic properties, improved mechanical properties and without substantial loss of polymer molecular weight during processing. The method includes producing dry spun-non wovens from a polymer, and collecting the fibers using a rotating collector plate, preferably a rotating cylinder, to collect the non-woven instead of a fiberglass stationary collector plate. The non-wovens can be used for a variety of purposes including fabrication of medical devices.
摘要:
IR-emitting or reflecting polymer fibers are formed by blending a high concentration of IR-emitting or reflecting particles with a thermoplastic polymer and meltblowing fibers which have an average diameter of 20 μ or less. The meltblowing process allows for inclusion of a high concentration of the IR-emitting or reflecting particles, yet allows fibers to be formed. These can be formed into a soft, air-permeable, nonwoven web. The fibers can be monocomponent or bicomponent or multicomponent and can be textured or shaped.
摘要:
A stent or other prosthesis may be formed by encapsulating a scaffold or frame with a polymer coating. The polymer coating may consist of layers of electrospun polytetrafluoroethylne (PTFE). Electrospun PTFE of certain porosities may permit endothelial cell growth within the prosthesis. The stent may be applicable to stents designed for the central venous system, peripheral vascular stents, abdominal aortic aneurism stents, bronchial stents, esophageal stents, biliary stents, or any other stent.
摘要:
The present disclosure is directed, in part, to an absorbent article comprising a liquid pervious material, a liquid impervious material, and an absorbent core disposed at least partially intermediate the liquid pervious material and the liquid impervious material. The absorbent article comprises one or more nonwoven substrates each comprising one or more layers of fibers. A plurality of the fibers each comprise a plurality of fibrils extending outwardly from a surface of the fibers. The plurality of fibrils comprise a lipid ester.
摘要:
Non-woven mat including basalt and amorphous refractory ceramic fibers, bio-soluble ceramic fibers, and/or heat-treated silica fibers. Embodiments of the non-woven mat surprisingly have a Resiliency Value after three thermal cycles from 25° C. to 700° C./400° C. of the Real Condition Fixture Test at least 1.1 times greater than the Resiliency Value of a comparable non-woven mat consisting of any individual type of fibers of the non-woven mat. The non-woven mats are useful, for example, in pollution control devices and other thermal insulation applications.
摘要:
A smokeless tobacco product includes smokeless tobacco and structural fibers. The structural fibers forming a network in which the smokeless tobacco is entangled. The structural fibers have a composition different from the smokeless tobacco. The tobacco-entangled fabric can have an overall oven volatiles content of at least 10 weight percent. In some embodiments, the structural fibers form a nonwoven network. In some embodiments, fibrous structures of the smokeless tobacco are entangled with the structural fibers.
摘要:
The invention relates to a method for producing a preform by means of an electrospinning process. The present invention also relates to the use of the present preform as a substrate for growing human or animal tissue thereon. The present invention furthermore relates to a method for growing human or animal tissue on a substrate, wherein the present preform is used as the substrate.
摘要:
Temperature resistant multilayer composites, methods for making same, and articles made therefrom. The method can include extruding one or more polyolefin polymers having a MFR from less than 90 dg/min through at least one die having a plurality of nozzles to form a plurality of continuous fibers, at least one die operating at a melt pressure from greater than 500 psi (3447 kPa) to form at least one elastic meltblown layer; adhering the at least one elastic meltblown layer to at least one extensible layer to form a multilayer composite; and at least partially crosslinking the elastic meltblown layer or the extensible layer or both.
摘要:
A fiber defined by a surface having a concentration of antimicrobial and a center having another concentration of antimicrobial is provided. The concentration of antimicrobial at the surface of the fiber is greater than the concentration of antimicrobial at the center of the fiber. Nonwovens manufactured from the fiber are also provided. The antimicrobial may include an antimicrobial heat labile component in conjunction with a carrier.
摘要:
The invention relates a multilayer preform obtained by electro-spinning, which preform is suitable as a scaffold for a prosthesis, which preform comprises at least one layer of microfibers and at least one layer of nanofibers, wherein the pore size of the at least one layer of microfibers is in the range of 1-300 micrometer and in that the pore size of the at least one layer of nanofibers is in the range of 1-300 micrometer. The present invention also relates to a method of producing said preform. The present invention also relates to the use of the present preform as a substrate for growing human or animal tissue thereon. The present invention furthermore relates to a method for growing human or animal tissue on a substrate, wherein the present preform is used as the substrate.