JP-2026514530-A - Cellulose yarn package, and its manufacturing method and processing method.

Abstract

A cellulosic yarn package comprising a core and a plurality of individually entangled cellulosic yarns wound around the core. The yarns can be wound around different sections of the core or around at least one common section of the core. The yarns do not entangle or twist with each other on the core, thereby allowing the yarns to be wound individually from the core. [Selection Diagram] Figure 1

Inventors

• チン，グオ－ウェイ
• マクラウド，アンドリュー・アービン
• エステップ，ロバート・ノア
• シェン，ユビン

Assignees

• イーストマン ケミカル カンパニー

Dates

Publication Date

20260511

Application Date

20240501

Priority Date

20230504

Claims (20)

1. The core and A cellulosic yarn package comprising: two to four individually entangled cellulosic yarns wound around the core, wherein each of the cellulosic yarns is not permanently entangled with one another on the core.
2. The core and The system comprises a plurality of individually entangled cellulosic threads wound around the core, The threads are not permanently entangled with each other on the core. Each of the aforementioned yarns is a cellulose yarn package with a density of less than approximately 300 denier.
3. The cellulose yarn package according to claim 1, wherein the yarns can be individually wound from the core.
4. The cellulose yarn package according to claim 1, wherein the yarn can be simultaneously wound from the core.
5. The cellulose yarn package according to claim 1, wherein each of the aforementioned yarns can be sequentially wound from the core.
6. The cellulose yarn package according to claim 1, wherein the yarn is co-wound with the core.
7. The cellulose yarn package according to claim 1, wherein the yarn comprises at least one of spun yarn and/or filament yarn.
8. The cellulose yarn package according to claim 1, wherein each of the yarns is in the range of approximately 10 to approximately 300 denier.
9. The cellulose yarn package according to claim 1, wherein each yarn contains 2 to 300 individual filaments.
10. The cellulose yarn package according to claim 1, wherein each of the yarns has a denier (dpf) per filament in the range of approximately 0.25 to approximately 50.
11. The cellulose yarn package according to claim 1, wherein each yarn has a density of approximately 1 to approximately 50 entangled nodes per foot.
12. The cellulosic yarn package according to claim 1, wherein the yarn comprises at least one material selected from the group consisting of cellulose acetate material, modified cellulose material, recycled material, biodegradable material, and combinations thereof.
13. The cellulose acetate material has an acetyl substitution degree of about 2.2 to about 3, as described in claim 12, for the cellulose yarn package.
14. The cellulose yarn package according to claim 1, wherein the yarn is coated with at least one finishing agent.
15. The finishing agent comprises one or more components selected from the group consisting of water, mineral oil, antistatic additives, surfactants, phosphate-containing salts, and combinations thereof. The cellulose yarn package according to claim 14, wherein the total amount of the finishing agent is in the range of about 0.1 to about 10 weight percent of each of the yarns.
16. The cellulose yarn package according to claim 1, wherein each yarn has a water content of approximately 3.5 to approximately 30 percent based on the total weight of the yarn.
17. The cellulose yarn package according to claim 1, wherein the yarn has a residual solvent content in the range of about 0 to about 30 percent based on the total weight of the yarn.
18. The cellulose yarn package according to claim 1, wherein the yarn contains one or more additives selected from the group consisting of pigments, colorants, antibacterial agents, UV stabilizers, flame retardants, antioxidants, heat stabilizers, oxidation promoters, acid scavengers, inorganic substances, photodegrading agents, biodegrading agents, decomposition accelerators, polyesters, enzymes, microorganisms, water-soluble polymers, modified cellulose acetates, water-dispersible additives, nitrogen-containing compounds, hydroxyl-functional compounds, oxygen-containing heterocyclic compounds, sulfur-containing heterocyclic compounds, anhydrides, and monoepoxides.
19. The cellulose yarn package according to claim 1, wherein at least one of the yarns is formed from a filament having a shape selected from the group consisting of a circular cross-sectional shape, an irregular cross-sectional shape, and a small cone-shaped irregular cross-sectional shape.
20. The cellulose yarn package according to claim 1, wherein the yarn is formed by wet spinning, dry spinning, or melt spinning.

Description

Technical field This application relates, in general, to cellulosic yarns, and more particularly to systems and methods for use in increasing the production of cellulosic yarns. Description of related technologies Description of related technologies: Fiber fabrics made from yarn are widely used in a variety of applications. These fabrics can be formed by weaving, knitting, crocheting, knotting, or felting yarns made from materials such as polyester, polyamide, acrylic, polyurethane, glass, polypropylene, silk, and various cellulosic materials. Cellulose acetate fibers are one type of cellulosic material known for their sustainability, biodegradability, and renewable nature. Traditionally, cellulose acetate fibers are formed by extruding dope from a spinneret to generate multiple filaments, which can then be joined to create multifilament yarn. As the market for cellulosic fibers grows, the potential for increased fiber production is being explored. However, there are limitations to the number of spinnerets that can be accommodated in existing spinning machine cabinets. Furthermore, adding additional spinning machines to production facilities or adding additional winders to existing spinning machines is a time-consuming and costly endeavor. Therefore, it is desirable to increase the production of cellulose acetate fibers using existing equipment and processes without investing in additional, expensive equipment. In one embodiment of the present invention, The core and A cellulose yarn package is provided, comprising cellulose yarns, 2 to 4 individually entangled cellulose yarns wound around a core, wherein each yarn is not permanently entangled with the others on the core. In another embodiment of the present invention, The core and It comprises multiple individually entangled cellulose fibers wrapped around a core, The threads are not permanently entangled with each other on the core. Each yarn is provided in a cellulose yarn package, with a density of less than approximately 300 denier. In another embodiment of the present invention, The core and It comprises multiple individually entangled cellulose fibers wrapped around a core, The thread is wrapped around separate sections of the core. The yarn is provided in a cellulose yarn package, in which the yarn is wound around a core in a spiral pattern. In yet another embodiment of the present invention, The core and It includes 2 to 4 individually entangled cellulosophical threads wrapped around the core, A cellulose yarn package is provided in which at least two threads are wound around at least one common section of a core. This is a schematic diagram of an exemplary yarn production system.Figure 1 shows one embodiment of the thread guide and winding subassembly.Figure 2 is a side view of an exemplary yarn package that can be produced.Figure 2 is a side view of an exemplary yarn package that can be produced.Figure 2 is a side view of another exemplary yarn package that may be produced.Figure 2 is a side view of another exemplary yarn package that may be produced.Another embodiment of the thread guide and winding subassembly shown in Figure 1 is presented.Figure 5 is a side view of an embodiment of a yarn package that can be produced.Figure 5 is a side view of an embodiment of a yarn package that can be produced.Another embodiment of the thread guide and winding subassembly shown in Figure 1 is presented.Figure 7 is a side view of an exemplary yarn package that may be produced.Another embodiment of the thread guide and winding subassembly shown in Figure 1 is presented.Figure 9 is a side view of an exemplary yarn package that may be produced.Figure 9 is a side view of an exemplary yarn package that may be produced. This application relates, in general, to systems and methods for use in increasing the production of cellulosic yarns, and to yarn packages produced therefrom. Yarn production is increased by extending the production capacity of existing fiber spinning machines and/or by switching other assets (e.g., tow production assets) to yarn production assets. Such yarns can be utilized in expanded application opportunities, for example, in downstream fiber replacement applications and in garment applications, which are the end applications. Yarns can be produced by any type of dry or wet spinning process known in the art. In one embodiment, wet spinning is defined as a process of dissolving at least one polymer in at least one solvent to create a liquid solution. The solution is passed through a spinneret and then comes into contact with a solidification bath, thereby solidifying the liquid into fibers. In another embodiment, dry spinning is defined as a process of dissolving at least one polymer in at least one solvent and then extruding the fibers. As the fibers exit through the spinneret, the solvent evaporates. A fiber spinning machine often includes multiple spinnerets per cabinet, each generating a yarn end, which is then wound onto a separate core. As