A sizing agent for carbon fiber includes component (A), component (B), and component (C), in which the component (A) is at least one selected from the group consisting of component (A-1), component (A-2), and component (A-3); the component (A-1) is a urethane compound having a structure of Formula (1-1) in the molecule, the component (A-2) is an ester compound having a structure represented by Formula (1-2) in the molecule, the component (A-3) is an amide compound having a structure of Formula (1-3) in the molecule; the component (B) is an epoxy compound selected from the group consisting of an epoxy compound represented by Formula (2), an epoxy compound represented by Formula (3), and an epoxy compound represented by Formula (4); and the component (C) is a bisphenol type epoxy compound.

The invention relates to an industrial fabric, such as a texturing belt, used to create three-dimensional structures in a product produced thereon, e.g., in the papermaking field, such as for fiber products, and in nonwoven processes. The invention concerns a texturing belt that can impart an endless variety of complex patterns utilizing discretization, such as, wherein individual subunits that comprise a pattern element are not connected, and therefore do not act as a stressed member of the texturing belt.

The invention relates to an industrial fabric, such as a texturing belt, used to create three-dimensional structures in a product produced thereon, e.g., in the papermaking field, such as for fiber products, and in nonwoven processes. The invention concerns a texturing belt that can impart an endless variety of complex patterns utilizing discretization, such as, wherein individual subunits that comprise a pattern element are not connected, and therefore do not act as a stressed member of the texturing belt.

An amino group is grafted to a fiber surface, the ring-opening polymerization of aniline acid anhydride is initiated by the amino group on the fiber surface to form a graft chain, and a water-repellent fabric the fiber surface of which is modified by polyamino acid is prepared. The fabric treatment uses an amino group pre-grafted on a fiber surface as an initiator in the liquid phase, and initiates (substitutes), by means of ring-opening polymerization (ROP), aniline acid anhydride to complete graft polymerization on the fiber surface. The production conditions are mild, the preparation process of the product is simple, and operation is safe. In the disclosed water-repellent fabric obtained by chemical grafting, a functional protective layer on the fiber surface is covalently bonded to the fiber, thereby having excellent fastness without affecting the wearability of the fabric, thus the problem of a water-repellent fabric having poor fastness is solved.

An amino group is grafted to a fiber surface, the ring-opening polymerization of aniline acid anhydride is initiated by the amino group on the fiber surface to form a graft chain, and a water-repellent fabric the fiber surface of which is modified by polyamino acid is prepared. The fabric treatment uses an amino group pre-grafted on a fiber surface as an initiator in the liquid phase, and initiates (substitutes), by means of ring-opening polymerization (ROP), aniline acid anhydride to complete graft polymerization on the fiber surface. The production conditions are mild, the preparation process of the product is simple, and operation is safe. In the disclosed water-repellent fabric obtained by chemical grafting, a functional protective layer on the fiber surface is covalently bonded to the fiber, thereby having excellent fastness without affecting the wearability of the fabric, thus the problem of a water-repellent fabric having poor fastness is solved.

Disclosed are an aerogel blanket production method and an aerogel blanket produced thereby, the aerogel blanket production method including steps of: preparing a blanket; preparing a liquid raw material for aerogel formation with which the blanket is to be impregnated; impregnating the blanket with the liquid raw material; and gelling the impregnated liquid raw material to form aerogel, wherein a step of performing pre-processing on the blanket before the gelling of the liquid raw material is completed. The step of performing pre-processing may be performed after the step of preparing the blanket but before impregnating with the liquid raw material, or may be performed when the impregnated liquid raw material is in a flowable semi-liquid state before the liquid raw material is not completely converted into aerogel.

Disclosed are an aerogel blanket production method and an aerogel blanket produced thereby, the aerogel blanket production method including steps of: preparing a blanket; preparing a liquid raw material for aerogel formation with which the blanket is to be impregnated; impregnating the blanket with the liquid raw material; and gelling the impregnated liquid raw material to form aerogel, wherein a step of performing pre-processing on the blanket before the gelling of the liquid raw material is completed. The step of performing pre-processing may be performed after the step of preparing the blanket but before impregnating with the liquid raw material, or may be performed when the impregnated liquid raw material is in a flowable semi-liquid state before the liquid raw material is not completely converted into aerogel.

A fluorine-free composition includes at least one polycarbodiimide compound derived from a carbodiimidization reaction of a carbodiimidization reaction mixture comprising at least one oligomer, wherein the oligomer comprises at least one isocyanate end group and at least two repeating units, wherein each of the at least two repeating units comprises at least one hydrocarbon group having at least 16 carbon atoms. The composition may also include at least one paraffin wax. Such compositions are useful for treating fibrous substrates to enhance their water-repellency.

A fluorine-free composition includes at least one polycarbodiimide compound derived from a carbodiimidization reaction of a carbodiimidization reaction mixture comprising at least one oligomer, wherein the oligomer comprises at least one isocyanate end group and at least two repeating units, wherein each of the at least two repeating units comprises at least one hydrocarbon group having at least 16 carbon atoms. The composition may also include at least one paraffin wax. Such compositions are useful for treating fibrous substrates to enhance their water-repellency.

A manufacturing method for a ceramic matrix composite, having a woven fabric that has multiple fiber bundles and having a matrix that is disposed in the gaps between the fiber bundles, includes: a green body formation step for forming a green body by sintering the woven fabric infiltrated with a polymer that is a precursor to the matrix; and a densification step for further infiltrating the green body with a polymer and sintering same. The densification step includes: a second infiltration step for further infiltrating the green body with a polymer so as to form an infiltrated green body; a drying step for drying the infiltrated green body so as to form a dried green body; a steam treatment step for leaving the dried green body under saturation water vapor pressure so as to form a treated green body; and a sintering step for sintering the treated green body.