Abstract:
La invención descrita en este documento permite fabricar nanotubos a partir de chorros coaxiales de líquidos inmiscibles o pobremente miscibles. El objetivo es producir fibras huecas (nanotubos) o fibras compuestas con diámetros comprendidos en un rango de unas pocas micras hasta unas decenas de nanómetros, y con paredes, en el caso de nanotubos, cuyo espesor mide desde unas centenas de nanómetros hasta unos pocos nanómetros. En este procedimiento de formación de nanotubos se recurre a la generación de nano-chorros coaxiales de dos líquidos mediante técnicas electro-hidro-dinámicas.
Abstract:
The present invention provides a multicomponent fiber containing at least two polymer components arranged in distinct zones or segments across the cross-section of the fiber wherein at least one component of the fiber contains a thermoplastic polymer and at least one component of the fiber contains a thermoset polymer. The invention also provides fabrics and fabric laminates containing the multicomponent fibers, and articles containing the fabric . Additionally provided is a process for producing the multicomponent fibers.
Abstract:
The invention relates to a bristle (1) impregnated with an anti-microbial agent. Said bristle consists predominantly of a thermoplastic and is doped with an anti-microbial agent (4, 5) which diffuses onto the surface of the bristle. The bristle is produced in a multi-component extrusion process and has at least a first cross-sectional area consisting of a plastic component (2), said area determining the characteristics for use of the bristle and at least one additional cross-sectional area (3) consisting of the other plastic component. The additional cross-sectional area, or the sum of all additional cross-sectional areas controls the diffusion speed of the anti-microbial substance.
Abstract:
A hydrophilic binder fiber. These fibers may be produced by co-spinning a polyolefin core material with a highly wettable aliphatic polyester blend sheath material. The highly wettable aliphatic polyester blend comprises an unreacted mixture of an aliphatic polyester polymer selected from the group consisting of a polybutylene succinate polymer, a polybutylene succinate-co-adipate polymer, a polycaprolactone polymer, a mixture of such polymers, or a copolymer of such polymers; a multicarboxylic acid; and a wetting agent. The hydrophilic binder fiber exhibits substantially improved biodegradable properties, yet is easily processed. The hydrophilic binder fiber may be used in a disposable absorbent product intended for the absorption of fluids such as body fluids.
Abstract:
The invention is directed to a fire resistant corespun yarn (Fig.1) and a fabric (Fig. 3) made therefrom. The yarn (100) includes a core (102) surrounded by a first sheath (104) and a second sheath (106).
Abstract:
A split type conjugate fiber having at least two types A and B of thermoplastic synthetic fiber which are alternately arranged in the fiber cross section thereof, characterized in that (1) component A is continuously formed along the direction of the fiber axis thereof and, with respect to B component, a part thereof is completely spliced with component A along the direction of the fiber axis thereof and another part thereof is spliced in a small area with component A and/or another part thereof is not spliced with component A, the above parts being randomly mixed; (2) in the cross section thereof, respective components are alternately adjacent to one another in the major axis direction, and the cross section has a winding, bending or flat shape and a ratio of a major axis L to a minor axis W of 3 to 20; (3) it is a polyolefin split type conjugate fiber wherein in the cross section thereof respective components are alternately arranged in a radial manner, and it has a hollow portion in the central part thereof, and the ratio of an average length W of fiber circumference arcs to an average thickness L from the hollow portion to the fiber circumference in a resin component is 0.25 to 2.5, or (4) in the cross section thereof respective components are arranged alternately, it has a hollow portion in the central part thereof, and by an external force said cross section is deformed to a flat form and a part of each component is separated.
Abstract:
A synthetic fiber is formed with a plurality of longitudinally-extending cavities (16, 54 and 64) which hold a medicament that is intended to be absorbed into tissue brought into contact with the fiber. The fiber can be formed by dissolving a soluble polymer component (14) of an extruded plural-component fiber (10), leaving cavities (16), that extend inward from the outer surface of the fiber in the locations of the dissolved polymer. After the fiber has been exposed to a solvent, the cavities left by the dissolved component are filled with a medicament (18). Specifically, the cavities are filled with a medicament that is mixed with a viscous carrier which solidifies within the cavities. The fibers can be used to make sutures, textile prostheses for insertion into the body, and epidermal pads and bandages. Fibers having internal cavities (64), i.e., cavities not extending to the external surface of the fiber, can be formed by extruding a single-component fiber (60) from a spinneret orifice (72) having a number of T-shaped slots extending from a central hub. A medicament is introduced into the internal cavities by soaking the fiber in a liquid containing the medicament. The internal-cavity fiber is therefore formed of polymer having some capability for liquid transport, e.g., nylon.
Abstract:
The invention discloses a textile laminate (1, 400, 450) with a first layer (5) comprising a waterproof and preferably breathable functional layer (10, 20) and a second layer (30) comprising at least a first component and a second component. The first component is stable to a first temperature and the second component melts at a lower second temperature. In one embodiment of the invention, the first component is polyester and the second component may be a thermoplastic such as copolyester, polyamide, copolyamide or polyethylene. The textile laminate (1) is particularly advantageous when two of such laminates (1, 400, 500) have to be joined or fused together. In this case a waterproof seam is created at the seam (500) between the two laminates (1, 400, 500).
Abstract:
Disclosed is a thermoplastic composition comprising an unreacted mixture of an aliphatic polyester polymer as a continuous phase, polyolefin microfibers as a discontinuous phase encased within the aliphatic polyester polymer continuous phase, and a compatibilizer for the aliphatic polyester polymer and the polyolefin microfibers. The multicomponent fiber exhibits substantial biodegradable properties and good wettability yet is easily processed. The thermoplastic composition is useful in making nonwoven structures that may be used in a disposable absorbent product intended for the absorption of fluids such as body fluids. 00000
Abstract:
Composite articles that can resist discoloration or color changes are described. In some instances, the composite articles can include a compounded material that is substantially free of an antioxidant that changes from a first color to a second color upon exposure to an environment comprising an oxidizing agent. The composite articles can be flame retardant and may provide sound reduction as well.