Compositions especially suitable for forming fibers and films having good elasticity and relatively high modulus are disclosed. Surprisingly, compositions including a styrenic block copolymer having a relatively high melt flow rate, and a detackifier, and optionally, but preferably in some embodiments a polyolefin (co)polymer, and/or polystyrene polymer, and/or a softener have good draw down performance and are processable into fibers having low tack, relatively high modulus and tensile strength. The fibers produced from the composition can be processed easily and are useful to manufacture articles such as fabrics, both woven and non-woven, webs, threads, and yarns. In various embodiments, unique fiber structures are produced having low tack and desirable elasticity.

There is provided a reinforcing carbon fiber bundle of the present invention is a reinforcing carbon fiber bundle with a sizing agent adhered to surfaces of carbon fibers, and characterized in that the sizing agent is constituted by at least two components, a first component does not melt at 150° C., and a second component in flowable at 150° C., and the reinforcing carbon fiber bundle is improved in impregnation property and openability and is excellent in workability and optimum for a composite.

A method for reducing force needed for ironing a fabric comprising laundering the fabric with a composition comprising a linear polyether having a weight average molecular weight less than 5000 that is terminated with —N—(—CH.sub.2—CH(OH)—CH.sub.2—Cl).sub.2, wherein the linear polyether is deposited on the fabric and reduces the force needed for ironing.

Esters of polylactic acid, including polyethylene glycol esters of polylactic acid, that are coupled with an acid are disclosed. Exemplary coupled esters of polylactic acid can be used as textile finishes. Methods of making the coupled esters of polylactic acid via direct and/or transesterification reactions are also disclosed.

Provided is a fiber sizing agent including a vinyl ester resin (A), an epoxy compound (B), and an aqueous medium. The vinyl ester resin (A) has an alkoxy polyoxyalkylene structure and a urethane linkage. The fiber sizing agent exhibits excellent binding ability for various fibers, such as glass fibers and carbon fibers. Molded articles produced from a molding material including the fiber sizing agent have various excellent physical properties, and examples of the physical properties include flexural strength, compressive strength, and interlaminar shear strength. Accordingly, the molded articles can be used, for example, in automotive parts, aircraft parts, windmill parts, industrial parts, and the like.

An object of the present invention is to provide a sewing thread treatment agent, and a sewing thread, each achieving low friction properties across a wide range of sewing speeds. As a solution, a sewing thread treatment agent is provided, which is characterized in that it contains a hydroxy-terminated polydimethylsiloxane (A), a nonionic surfactant (B), and at least one type of wax (C) selected from paraffin wax, oxidized paraffin wax, polyethylene wax, oxidized polyethylene wax, and carnauba wax.

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.

The present invention relates to a polymerisable composition for bonding fibre units, in particular linear textiles such as filaments, yarns, twines or ropes, comprising at least one prepolymer having at least two polymerisable vinylidene groups, such as a polyurethane having at least two (meth)acrylate groups, at least one photoinitiator and at least one compound having at least one polymerisable vinylidene group with a weight average molecular weight of 70-800 g/mol. In addition, the present invention relates to a process for bonding fibre units, comprising applying the composition according to the invention to at least one fibre unit such as a filament, yarn, twine or rope and irradiation of the fibre unit thus obtained with radiation having a wavelength in the range of, for example, 100-450 nm.

A carbon fiber bundle having a high abrasion resistance property and simultaneously being excellent in widening property is provided by a carbon fiber bundle with an adhered sizing agent including a carbon fiber bundle, and a sizing agent adhered to a surface of the carbon fiber bundle, wherein the sizing agent contains an epoxy compound, and shows an intersection of a storage modulus and a loss modulus at an angular frequency in the range of 1×10.sup.5 to 1×10.sup.9 rad/sec in a measurement at 25° C.

Disclosed is an elastic fiber treatment agent that contains a smoothing agent and an alkyl phosphate ester compound. The alkyl phosphate ester compound contains specific phosphate ester Q1 and at least one or more selected from specific phosphate esters Q2 and Q3. In a P nucleus NMR measurement of the alkyl phosphate ester compound upon an alkali over-neutralization pretreatment, a P nucleus NMR integral ratio attributed to the phosphate ester Q1 is 15% to 60% if the sum of P nucleus NMR integral ratios attributed to the phosphate esters Q1 to Q3 and phosphoric acid and its salt is taken as 100%.