Light extinction polyester and low-gloss elastic composite fiber

Abstract

The invention provides light extinction polyester and a low-gloss elastic composite fiber. The light extinction polyester comprises the following component in percentage by mass: 0.5-5.0% of titaniumdioxide nano granules, wherein the particle size of the titanium dioxide nano granules is 20-200 nm; detection with incident rays of 45 degrees shows that the gloss of the light extinction polyester is less than 20. The titanium dioxide nano granules are uniformly dispersed in the light extinction polyester and are not agglomerated. The mass ratio of a PET component to a PTT component in the low-gloss PET / PTT elastic composite fiber is (40:60)-(60:40), the composite fiber is formed through a composite melting spinning component, titanium dioxide is uniformly dispersed in the composite fiber, no agglomeration phenomenon is caused, the particle size of the titanium dioxide dispersed in the fiber is less than 10 [mu]m, the strength of the composite elastic fiber is greater than 3.0 cN / dtex, the gloss on the surface of the fiber is less than 20, and the elastic recovery rate is greater than or equal to 90%.

Description

technical field [0001] The invention belongs to the field of fiber forming and processing, and relates to a matting polyester and a low-gloss elastic composite fiber. Background technique [0002] China is a big country of chemical fiber, and chemical fiber is an important raw material in the textile field. In terms of chemical fiber production, China's chemical fiber production capacity reached more than 40 million tons in 2015, of which polyester fiber accounted for 70% of the total chemical fiber production. Improving the differentiation and functionalization level of polyester fibers is directly related to the upgrading of polyester products. Comfort modification is the development trend of polyester fiber differentiation and functionalization, and gloss comfort is an important part of comfortable polyester fiber products. [0003] Titanium dioxide is a common matting agent, which has been widely used in products such as polyester and polyamide fibers. However, from th...

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Problems solved by technology

[0003] Titanium dioxide is a common matting agent, which has been widely used in products such as polyester and polyamide fibers. However, from the perspective of practical application, the introduction of titanium dioxide into polyester materials still has the following problems: (1) the existing titanium dioxide is introduced into Polyester materials are in the form of in-situ polymerization or blending, but nano-scale titanium dioxide is very easy to agglomerate and thus agglomerates, which must rely on the high shear force of the equipment. Therefore, the introduction of the existing titanium dioxide matting agent poses a challenge to the equipment Very strict requirements; (2) The current titanium dioxide matting needs to be added in a relatively high amount to achieve a significant improvement in gloss, especially in the preparation of full matting polyester, the mass fraction of titanium dioxide introduced should reach 2.5-3.0% In order to achieve the effect of full extinction, but such a high content of extinction agent also has a great impact on the mechanical properties of the fiber; (3) Titanium dioxide itself has a certain optical activity, and it is self-cleaning and anti-ultraviolet when distributed in the material. , the higher the content, the more obvious the effect, but the existing system cannot realize the distribution of high content above 3.0%

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