The invention relates to the textile industry, and specifically to methods for processing bast-fiber materials, for instance the fiber of flax, hemp, jute, nettle, kenaf, and others. The technical result which the present invention aims to achieve consists in: enhancing the quality of a cottonized fiber, when processing bast-fiber materials, by means of high-voltage electric pulse discharges following preliminary biochemical and final minimal mechanical processing; and in enhancing the physical/mechanical and spinning properties thereof, which, overall, allows for an optimized, efficient production process. Said technical result is achieved in that a bast-fiber material processing method includes a technological sequence of processes involving feeding raw material into a bale breaker, which is provided with a decompactor, and into a dosing system, processing using high-voltage electric pulse discharges, rinsing with emulsifying reagents, washing and press-drying in a drum-type installation, decompacting, final drying and light decompacting; the raw material is biochemically treated prior to being fed into high-voltage electric pulse discharge chambers.

Fabrication of ballistic resistant fibrous composites having improved ballistic resistance properties. More particularly, ballistic resistant fibrous composites having high interlaminar lap shear strength between component fiber plies or fiber layers, which correlates to low composite backface signature. The high lap shear strength, low backface signature composites are useful for the production of hard armor articles, including helmet armor.

Systems and methods for plasma treating fiber tows (e.g., carbon fiber tows) are disclosed. The system may be a fiber tow treatment system, including an air-plasma source configured to emit a plasma stream and a support surface spaced apart from the air-plasma source and configured to contact the plasma stream when emitted. First and second guides may be on opposing ends of the support surface and configured to align a moving fiber tow between the support surface and the air-plasma source. The method may include continuously transferring a fiber tow through a first guide, across a support surface, and through a second guide; and air-plasma treating the fiber tow as it crosses the support surface such that a deflection of the fiber tow from the air-plasma treatment is limited by the support surface. The disclosed systems/methods may reduce the damage to fiber tows during plasma treatment.

According to an aspect of the present disclosure, a color sensor is provided for sensing whether a ground roller in a corona treatment system needs to be serviced. The color sensor is capable of detecting imperfections which have changed the reflectance level of the ground roller from a predefined level. According to another aspect of the present disclosure, if a determination is made that the ground roller needs to be serviced, then an alarm is activated and/or the operation of the corona treatment system is ceased.

The invention provides a method of coating a fabric, e.g. a textile material, with a polymer coating, which method comprises contacting a fabric with a monomer and subjecting the monomer to low power plasma polymerization, wherein the monomer comprises the general formula (I): C.sub.nF.sub.2n+1C.sub.mX.sub.2mCR.sub.1Y—OCO—C(R.sub.2)═CH.sub.2, wherein n is 2 to 6, m is 0 to 9, X and Y are H, F, Cl, Br or I, R.sub.1 is H or alkyl, e.g. —CH.sub.3, or a substituted alkyl, e.g. an at least partially halo-substituted alkyl, and R.sub.2 is H or alkyl, e.g. —CH.sub.3 or a substituted alkyl, e.g. an at least partially halo-substituted alkyl.

The present disclosure provides a water-resistant nanofilm, a preparation method and an article thereof, in which fluorocarbon gas is used as a plasma source and is formed on a substrate surface of substrate by a plasma enhanced chemical vapor deposition method, so that the water-resistance performance of the substrate surface is improved.

An object is to provide a method for producing a liquid-crystal polyester processed product, the method improving the adhesion of a liquid-crystal polyester resin, which is a poorly adhesive resin. As a solution, a method for producing a liquid-crystal polyester processed product, including a step (I) of performing an oxidation treatment on a surface of a liquid-crystal polyester resin formed body including a repeating unit represented by general formula (1), is provided.

A process for forming a splittable fiber having the steps of providing a multicomponent fiber; or a multicomponent staple fiber, providing a finish material, and at least partially coating the multicomponent fiber with the finish material to form a splittable fiber. The multicomponent fiber; or a multicomponent staple fiber, contains a first thermoplastic segment comprising polymer component A and a second thermoplastic segment comprising polymer component B. The finish material has an evaporation point of less than about 160° C. A process for forming a nonwoven fabric, a split multicomponent fiber, a split multicomponent fiber with a durable charge, a nonwoven fabric, and a filter and/or a spun yarn formed by the fibers herein is also described.

A carbon fiber complex material for a carbon fiber reinforced plastic composite material includes a carbon fiber material formed from a continuous carbon fiber, and carbon nanowalls formed on a surface of the continuous carbon fiber.

Systems, methods, and compositions for producing liquid repellant materials include a first support configured to support a spool of flexible substrate, a second support configured to support a plurality of compressing rollers configured to apply a force to a segment of the flexible substrate that extends from the roll. The segment is located within a zone between the compressing rollers. The system, in an embodiment, has a plurality of gas directors, wherein each one of the gas directors is configured to direct a stream of gas that flows at least partially around one of the compressing rollers. The streams cause an air pressure reduction in the zone. Also, the system has a precursor supply configured to expose the substrate to a precursor (e.g., a siloxane precursor), resulting in a coated material or protected material.