The present invention provides a crimped conjugated fiber having a crimpable cross-sectional configuration wherein a cross section of the fiber comprises at least two portions: a portion (a) and a portion (b); the portion (a) comprises a propylene polymer (A) and the portion (b) comprises a propylene/-olefin random copolymer (B); the propylene polymer (A) has Mz/Mw(A) and the propylene/-olefin random copolymer (B) has Mz/Mw(B) wherein the difference thereof is in the range of 0.10 to 2.2; and the propylene polymer (A) has a melting point [Tm(A)] and the propylene/-olefin random copolymer (B) has a melting point [Tm(B)] wherein the difference thereof exceeds 10 C. The present invention also provides a non-woven fabric comprising the crimped conjugated fiber.

The present invention provides a crimped conjugated fiber having a crimpable cross-sectional configuration wherein a cross section of the fiber comprises at least two portions: a portion (a) and a portion (b); the portion (a) comprises a propylene polymer (A) and the portion (b) comprises a propylene/-olefin random copolymer (B); the propylene polymer (A) has Mz/Mw(A) and the propylene/-olefin random copolymer (B) has Mz/Mw(B) wherein the difference thereof is in the range of 0.10 to 2.2; and the propylene polymer (A) has a melting point [Tm(A)] and the propylene/-olefin random copolymer (B) has a melting point [Tm(B)] wherein the difference thereof exceeds 10 C. The present invention also provides a non-woven fabric comprising the crimped conjugated fiber.

In the process of preparing nanofibers by using an electrospinning process and preparing micron fibers by using a flash-spinning process, an electrospinning nozzle and a flash-spinning nozzle are controlled to be located above a receiving conveyor belt, and are directly opposite to each other with a spacing of 15-40 cm, and the electrospinning nozzle is controlled to be connected to a high-voltage power supply, and the flash-spinning nozzle and the receiving conveyor belt are controlled to be grounded to prepare a product; the prepared product has a film-like structure and consists of nanofibers and micron fibers. The micron fibers are mutually entangled, curled and interpenetrated, and the nanofibers are uniformly interspersed and distributed within the micron fibers, some of the nanofibers and the micron fibers forming entangled and interpenetrated structures, with mutual bonding between the nanofibers, between the micron fibers and between the nanofibers and the micron fibers.

In the process of preparing nanofibers by using an electrospinning process and preparing micron fibers by using a flash-spinning process, an electrospinning nozzle and a flash-spinning nozzle are controlled to be located above a receiving conveyor belt, and are directly opposite to each other with a spacing of 15-40 cm, and the electrospinning nozzle is controlled to be connected to a high-voltage power supply, and the flash-spinning nozzle and the receiving conveyor belt are controlled to be grounded to prepare a product; the prepared product has a film-like structure and consists of nanofibers and micron fibers. The micron fibers are mutually entangled, curled and interpenetrated, and the nanofibers are uniformly interspersed and distributed within the micron fibers, some of the nanofibers and the micron fibers forming entangled and interpenetrated structures, with mutual bonding between the nanofibers, between the micron fibers and between the nanofibers and the micron fibers.

A nonwoven fabric having a plurality of fibers bonded to form a coherent web, the fibers are formed of a polymeric blend of a polypropylene resin and an elastomeric polyolefin, wherein the fabric exhibits a decrease in fiber fineness of at least 5% in comparison to an identically prepared nonwoven fabric that does not include the elastomeric polyolefin blended with the polypropylene resin.

A nonwoven fabric having a plurality of fibers bonded to form a coherent web, the fibers are formed of a polymeric blend of a polypropylene resin and an elastomeric polyolefin, wherein the fabric exhibits a decrease in fiber fineness of at least 5% in comparison to an identically prepared nonwoven fabric that does not include the elastomeric polyolefin blended with the polypropylene resin.

An object of the present invention is to provide a fiber aggregate for a molded article having satisfactory appearance that can provide a molded article excellent in stiffness and strength against bending, further excellent in impact resistance and appearance. The object of the present invention is also to provide a pre-sheet and a molded article that are obtained from the fiber aggregate for the molded article. The fiber aggregate for molding according to the present invention includes the fiber component and the thermal fusion bonding resin component, in which the fiber component contains a pulp fiber and a polypropylene fiber; the thermal fusion bonding resin component contains at least one selected from the group consisting of polyethylene and acid-modified polyethylene; a content of the thermal fusion bonding resin component in the fiber aggregate is 3% by mass or more and 18% by mass or less; and when T represents a tensile strength of the fiber aggregate in a first direction, and Y represents a tensile strength of the fiber aggregate in a second direction perpendicular to the first direction, a T/Y ratio is 0.5 or larger and 1.5 or smaller.

An installation and a method for selectively producing a single-ply or alternatively a multi-ply nonwoven includes an inclined wire former configured to deposit a sheet of wet-laid fibre material on a first circulating belt, a further belt configured to receive the sheet of wet-laid fibre material from the first circulating belt, a roller card arranged downstream in the material transport direction and configured to introduce a roller card web into the installation, a hydroentanglement arranged downstream in the material transport direction and including at least one water beam configured to entangle, bond and/or structure a single sheet of fibres or a plurality of sheets of fibres, and a dryer arranged downstream in the material transport direction.

A nonwoven web material is formed from fibers including a first polymer, a second polymer and a filler. The first polymer and second polymer may be olefin homopolymers and the filler may be calcium carbonate. The second polymer may have a lower melt flow rate than the first polymer. The fibers are formed in a monocomponent, i.e., monofilament, or multicomponent, e.g., sheath-core bicomponent, arrangement. The nonwoven web material may be used to form an article such as a medical product, a surgical product, a personal protective product, and/or an industrial garment.

A nonwoven web material is formed from fibers including a first polymer, a second polymer and a filler. The first polymer and second polymer may be olefin homopolymers and the filler may be calcium carbonate. The second polymer may have a lower melt flow rate than the first polymer. The fibers are formed in a monocomponent, i.e., monofilament, or multicomponent, e.g., sheath-core bicomponent, arrangement. The nonwoven web material may be used to form an article such as a medical product, a surgical product, a personal protective product, and/or an industrial garment.