Chisso Corporation

Sadaaki Nakajima

Taiju Terakawa

Masahiko Taniguchi

Morio Abe

Isao Fujimura

Masaru Nishijima

Shingo Horiuchi

Kanemitsu Fuchigami

A compact in-line high-speed apparatus and method for producing thermoplastic synthetic fibers includes a melt spinning device with a spinning block and a tow drawer; wherein the spinning block has at least one extruder, at least one spinneret block, and heating devices, and the tow drawer draws fibers spun from the spinning block as a bundled tow. Also provided is a drawn tow accumulating device equipped with at least two tow feeding rolls and a tow accumulating conveyer, wherein the tow feeding rolls feed the tow obtained from the tow drawer onto the tow accumulating conveyer, and the tow accumulating conveyer accumulates the tow fed from the tow feeding rolls. A high-speed tow stretching device is used for stretching tie tow supplied from the drawn tow accumulating device at high stretching speed.

High-speed apparatus and method for producing thermoplastic synthetic fibers

A spinneret device for side-by-side, conjugate melt-blow spinning can correspond to combinations of various heterogeneous polymers for conjugate spinning and is uniform in the conjugate state such as conjugate ratio between single fibers, the proportion of the peripheral percentage of both the components in the fiber cross-section, etc. and has fineness, a large nozzle plate width and a superior productivity. The device is composed mainly of a spinning resin-feeding plate; a distributing plate; a separating plate provided with confluent grooves of conjugate components engraved at the bottom part of the plate, corresponding in number to the spinning nozzles; a nozzle plate; and a plate for controlling the clearance for a gas. Even when the viscosity unevenness, spinning temperature unevenness, etc. of the spinning resins occur in the cavity of the nozzle plate to some extent, microfine fibers can be obtained which are uniform in the composite ratio and the cross-sectional, peripheral percentages of the respective components in the fiber cross-section, while being uniformly fine.

Spinneret device for conjugate melt-blow spinning

A fiber bundle comprising a plurality of composite fibers spun out of a spinneret is blown against a working net conveyor by a drawing force of a high-speed air stream while the air stream is sucked and removed from below the net conveyor to deposit the fiber bundle on the net conveyor to form a web, and the web is then heat-treated to develop crimps and the fibers thermally adhere together at their points of contact, thereby obtaining a nonwoven fabric, wherein the air stream is blown against the web from below the net conveyor for a time before the heat-treatment, with an intensity sufficient to make the web to float in such a manner that the bottom face of the web rise above the net conveyor by 0.2 to 30 mm.

Method for manufacturing bulky nonwoven fabrics

A spinneret device for conjugate fibers of eccentric sheath-and-core type, capable of universally corresponding to various polymer-spinning conditions; affording a uniform eccentric extent of the core component; reducing the quality variation of single fibers and also that of fibers with lapse of time; being manufactured by easy works and economically are provided, which device includes cap 1; inlets of stocks 2, 2A; reservoirs 3, 3A; partitioner 4 separating 3 and 3A; filter 6; first distributing plate 7 provided with introducing holoes 8A, 8 for alternately distributing the stocks into front and rear distributing grooves 10A, 10; second distributing plate 9 on the back surface of which the grooves 10A, 10 being parallel, equally spaced and linear are engraved and on the ventral surface of which pressure-controlling holes 11A, 11 are bored; eccentricity-controlling plate 14 on the back surface of which grooves for eccentricity, 15 are engraved and the ventral surface (flat) of which introducing holes 16 for leading the stocks rendered eccentric by the grooves 15 to nozzle plate 17 are provided; the nozzle plate 17 having a flat back surface and spinning holes bored at a position where the holes 11 are concentric with the holes 16; and spacer 12 for forming a narrow and uniform clearance 13 between plate 9 and plate 14; holes 11A being arranged so as to be positioned at the intersection of a square or rectangular lattice; and holes 11 being arranged so as to be positioned at the intersection of two diagonals of the quadrilateral form formed by four adjacent holes 11A.

Spinneret device for conjugate fibers of eccentric sheath-and-core type

A sheath-core type composite spinneret assembly includes in combination:

Spinneret assembly for sheath-core type composite fibers

A spinneret assembly for conjugate spinning includes (1) a spinneret plate provided with a number of spinning holes and (2) a distribution plate superposed closely upon the upper face of the spinneret plate onto which two kinds of spinning liquids are to be fed. The distribution plate is arranged in such a manner that, of separate spinning liquid paths for the two kinds of spinning liquid comprising a number of separate and parallel inlet grooves for receiving individually and alternately the two kinds of spinning liquids fed from above and guide paths for guiding individually the two kinds of spinning liquids fed out of the inlet grooves onto upper openings of the spinning holes in the spinneret plate, a part or whole of each guide path forms a pressure-adjusting means. Liquid storing chambers are provided on the lower face of the distribution plate at positions corresponding to the spinning holes.

Spinneret assembly for conjugate spinning

Polyolefin foamed fibers consisting of composite fibers having a good spinnability, a small fineness and a non-waxy feeling, and a process for producing the same are provided, which foamed fibers having a structure wherein only a composite component (B) dominantly forming the fiber surface of composite fibers along the direction of the fiber axis thereof is substantially foamed and a part of the resulting foamed cells are burst open on the fiber surface, and which process comprises adding a foaming agent only to the above component (B) and combining two composite components so that the composite ratio thereof is 30/70 or higher and the theoretical average thickness of the component (B) in the cross-section of the unstretched fibers is 2 to 15 microns.

Polyolefin foamed fibers and process producing the same

Non-woven fabrics having light weight, high strength, soft hand and not having any waxy feeling is provided by subjecting fiber admixture to heat treatment, which fiber admixture is composed of foamed fiber, heat adhesive fiber and other kinds of fibers if necessary.

Growing community of inventors

Shiga, Japan

Sadaaki Nakajima