Breathable and waterproof film
US-2024228693-A1 · Jul 11, 2024 · US
Composite fiber
US12338552B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12338552-B2 |
| Application number | US-201917299369-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2019 |
| Priority date | Dec 21, 2018 |
| Publication date | Jun 24, 2025 |
| Grant date | Jun 24, 2025 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
The present invention relates to a composite fiber for obtaining a fiber having a strength at 100% elongation of 0.04 cN/dtex or less, wherein the composite fiber is composed of component X comprising a polyvinyl-based thermoplastic elastomer, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0° C. or lower, and component Y which is an easily soluble thermoplastic polymer, wherein the composite ratio (mass ratio) X:Y of the component X and the component Y is within the range of from 90:10 to 50:50, and wherein the composite fiber has a core-sheath structure in which the component X constitutes the core component, and the component Y constitutes the sheath component, in a cross section of the fiber.
First claim
Opening claim text (preview).
The invention claimed is: 1. A fiber which comprises a polyvinyl-based thermoplastic elastomer having a melt viscosity at 250° C. of less than 700 poise, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0° C. or lower, and which has a strength at 100% elongation of 0.025 cN/dtex or less. 2. The fiber according to claim 1 , wherein the fiber has an elongation modulus, as measured after repeating a test three times in accordance with JIS L 1096 (method B-1), of 95% or more. 3. A fabric comprising the fiber according to claim 1 , in at least a part thereof. 4. A method of producing the fiber according to claim 1 , wherein the method comprises dissolving and removing an easily soluble thermoplastic polymer from a composite fiber composed of component X comprising a polyvinyl-based thermoplastic elastomer, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0° C. or lower, and component Y which is the easily soluble thermoplastic polymer, wherein the composite ratio (mass ratio) X:Y of the component X and the component Y is within the range of from 90:10 to 50:50, and wherein the composite fiber has a core-sheath structure in which the component X constitutes the core component, and the component Y constitutes the sheath component, in a cross section of the fiber. 5. A method of producing the fabric according to claim 3 , wherein the method comprises dissolving and removing the easily soluble thermoplastic polymer from a composite fiber composed of component X comprising a polyvinyl-based thermoplastic elastomer, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0° C. or lower, and component Y which is the easily soluble thermoplastic polymer, wherein the composite ratio (mass ratio) X:Y of the component X and the component Y is within the range of from 90:10 to 50:50, and wherein the composite fiber has a core-sheath structure in which the component X constitutes the core component, and the component Y constitutes the sheath component, in a cross section of the fiber.
Assignees
Inventors
Classifications
from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title
from polyurethanes · CPC title
having improved processability or containing aids for moulding methods · CPC title
containing three or more polymers in a blend · CPC title
used for fibers · CPC title
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Frequently asked questions
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- What does patent US12338552B2 cover?
- The present invention relates to a composite fiber for obtaining a fiber having a strength at 100% elongation of 0.04 cN/dtex or less, wherein the composite fiber is composed of component X comprising a polyvinyl-based thermoplastic elastomer, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0° C. or lower, and component Y which is an easily soluble th…
- Who is the assignee on this patent?
- Kuraray Co
- What technology area does this patent fall under?
- Primary CPC classification D01F8/16. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Jun 24 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).