JPS5846113A - Spinning method and multifilament yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention produces fabrics with improved texture! −
) Concerning the technology of spinning filaments.

According to the specification of US II 1% 11g 49ro 51,287]
It is known to produce t-conger N-) filaments that can be split into subfilaments. As disclosed in this US Pat. A hollow filament capable of making fi grooves is formed in the filament.

According to the invention, when the subfilaments have substantially different deniers, a natural hand is achieved in fabrics made from such filaments or subfilaments.

The present invention, in its @1 aspect, comprises a plurality of molten streams from a spinneret, each of said streams being axially extending continuous segments of dissimilar polymers disposed alternately in side-by-side and temporarily adhesive relationship. forming a filament), further cooling said stream to form a filament and removing said filament 1 from said stream;
The flow is then such that some of the subfilaments separated from the first part of the filament are part of the filament II!
The spinning method provides that the spinning filament is selected to have a denier substantially different from the other spun filaments separated from the two parts.

According to another aspect of the invention, at least one of the filaments is splittable into a different number of subfilaments than another of the filaments.

In another aspect, the invention provides at least 1fE1
A -V# multifilament yarn is provided comprising a plurality of splittable filaments in each subfilament of a heavy body and a second polymer, wherein a subfilament separated from a first portion of said filaments is The filament has a substantially different denier than other subfilaments separated from the second portion of the filament.

According to another aspect of the invention, the first and second portions of the plurality of filaments are splittable into different numbers of subfilaments.

According to yet another aspect of the invention -1161, some subfilaments have a denier of at least 50 degrees greater than other subfilaments.

According to yet another aspect of the invention, some subfilaments are at least 1
It has a large denier.

Other aspects are set forth in part below, and in part will be apparent from the following description of the accompanying drawings.

As shown in FIG. 1, one example of a preferred spinneret construction is that the spinneret material 22 includes several groups of arch-shaped or horseshoe-shaped slots 20, with each group of these slots 20 are arranged symmetrically about the center point of the group with the horseshoe-shaped open ends facing inward. Several slots 2'0 of each group constitute a combined orifice for spinning a single filament. The slots 20 extend completely through the blank 22 except for a recess 24 at the apex of each slot 200.

The area between the web 24 and the adjacent ends of the slot 20 (
The land) constitutes an O support to hold the material in the center of the combined oriice.

Two different polymers are fed into the combined orifice in stream 2 supplying the sheath-core. The dotted circle 26 represents the interface between the two polymers. The adjacent ends of adjacent slots 200 are arranged close enough Km to allow the flow exiting the slots to merge directly below the spinneret. Therefore, the molten spin stream is a hollow structure consisting of segments of two @O polymers extending in the intersecting IK axis direction. Surface tension and other effects tend to force the molten stream to approximate a hollow circular cross-section prior to solidification, as shown in FIG. 2, which illustrates a filament formed by a combination of eight slots and as many as 20 orifices. If the melt viscosities of the polymers are different.

If it is a polymer with a lower viscosity! For each combination d orifice! It is usually preferred to use it as the core of the approaching flow.

The dimensions of the slots parallel to and transverse to the direction of polymer flow are selected to adjust the relative deniers of the combined filaments spun from the various combination orifices. Most conveniently, the lateral dimensions of the various slots can be made the same, and the length of the slot parallel to the direction of polymer flow adjusts the relative denier of the combined filaments. selected as follows. @ of the combined filaments
The pair diameter is thus adjustable and the number of segments or subfilaments for each combined filament is selected by the spinneret design so that they are separated from the resulting combined filament. It is possible to cover a wide range of subfilamen F deniers.

Specific dissimilar polymers are polyethylene (Tele7 Talley) and nylon 66. The term "heterogeneous" refers to the fact that the polymeric components of the coagulated filament readily separate from each other to form the filament.

The feel of fabrics made from yarns according to the invention can be varied widely (by selecting substantially different deniers for the sprung filaments). A significant improvement in hand is obtained when some of the subfilaments have a denier of at least 450- greater than others of the sub-filaments, and the difference in denier is at least 100- Sometimes even better results are obtained.

Following spinning, the yarn according to the invention is drawn either in a combined manner or in a separate operation. or by spinning at a sufficiently high speed to eliminate the need for a drawing operation.

[Brief explanation of the drawing]

FIG. 1 is a bottom plan view of a spinneret for producing yarn according to the invention, and FIG. 2 is a cutaway perspective view of a typical filament according to the invention. 20... Slot, 22... Spinneret material, 24...
··web.

Claims (1)

[Scope of Claims] 1) A plurality of molten streams formed from successive axially extending segments of dissimilar polymers, each alternately arranged in side-by-side and temporarily adhesive relationship, from a spinneret; generating and further cooling said stream to form a filament and removing said filament from said stream, wherein said stream includes a portion of said filament separated from a portion of said filament. A method of spinning, characterized in that the subfilaments are separated from the second filament and are selected to have a denier substantially different from the nine separate supply filaments. 2) The O-spinning method according to claim 1, characterized in that at least one filament of the filaments can be split into a number of subfilaments, unlike one other filament of the filaments. . S) Claims characterized in that some of said subfilaments have a denier that is at least 50 yo greater than said other subfilaments! ! ! The spinning method according to item 1. 4) A method according to claim 1, characterized in that some of said sub-filaments have a denier of at least 100 capsules greater than said other sub-filaments. 5) At least each subfilament of the first polymer and the second polymer includes a plurality of splittable filaments, and some filaments separated from the first portion of the filaments are separated from the second portion of the filaments. It is characterized by having a denier that is substantially different from the separated whole subfilaments. multifilament yarn 6) the first portion of the filament and the second portion of the filament;
6. Multifilament yarn according to claim 5, characterized in that 1S can be split into different numbers of spun filaments. 7) Multifilament yarn according to claim 17n5, characterized in that some of said subfilaments have a denier at least 5° greater than said other subfilaments. 8) characterized in that some of said subfilaments have a denier that is at least 1()O1 greater than said other subfilaments; 4+1 Multifilament yarn according to claim 1I5.