CN108611715B - High-glossiness acrylic yarn and preparation method thereof - Google Patents
High-glossiness acrylic yarn and preparation method thereof Download PDFInfo
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- CN108611715B CN108611715B CN201810637759.9A CN201810637759A CN108611715B CN 108611715 B CN108611715 B CN 108611715B CN 201810637759 A CN201810637759 A CN 201810637759A CN 108611715 B CN108611715 B CN 108611715B
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
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- D—TEXTILES; PAPER
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- D10B2321/10—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
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Abstract
The invention relates to a high-glossiness acrylic yarn and a preparation method thereof, wherein the preparation method comprises the following steps: respectively carrying out mixed spinning on the common acrylic fibers and the high-gloss yarns by a NaSCN method to obtain high-glossiness acrylic yarns; the high-gloss yarns are equal-grade foreign yarns and/or non-equal-grade foreign yarns of the PAN-based carbon fiber precursor, and the equal-grade foreign yarns of the PAN-based carbon fiber precursor are fibers with indexes exceeding the quality grade range of the precursor. The glossiness of the fabric made of the high-glossiness acrylic yarns is 10.8-12.5; the dyeing rate of the high-glossiness acrylic yarn dyed by the common acrylic fiber dyeing process is 78-84%. The preparation method of the high-glossiness acrylic yarn is simple, the utilization ways of foreign fibers such as carbon fiber precursors are expanded, the defect of low glossiness of the common acrylic yarn by the NaSCN method is overcome, the glossiness of the prepared acrylic yarn is remarkably improved, and the high-glossiness acrylic yarn can be widely applied to the field of household decoration materials and has a great application prospect.
Description
Technical Field
The invention belongs to the field of spinning, relates to high-glossiness acrylic yarn and a preparation method thereof, and particularly relates to acrylic yarn which is spun by mixing equal-grade and/or unequal-grade outer yarn in a PAN-based carbon fiber protofilament production process and common acrylic fiber of a NaSCN method and a preparation method thereof.
Background
The acrylic fiber has good light resistance and bright color, is widely applied textile fiber, and the application proportion of the acrylic fiber with high glossiness is increased year by year in domestic household decorative material markets such as curtains, interior wall decoration and the like due to gorgeous luster, luxurious style and excellent uvioresistant performance.
The acrylic fibers are the most synthetic fibers in the production process route, and the acrylic fibers produced in different process routes have different reflective light properties and influence the luster due to different fiber section shapes, fiber surface states and fiber internal structures (such as a layered structure, micropore conditions and the like). Wherein, the wet process route taking NaSCN as solvent is an industrial production route with high acrylic fiber productivity and wide application range. The acrylic fibers produced by the NaSCN method have good spinning processability, the fiber number coverage range is wide, and the dyeing property of the fibers is more excellent than that of other routes of fibers due to the contribution of the dye site of the third monomer and relatively more micropores. The fiber prepared by the wet spinning process with NaSCN as the solvent is characterized in that: the cross section of the fiber is circular, and due to the low solid content (usually below 13 wt%) of the stock solution, the fiber is contracted under the desolvation after solidification and formation, so that the surface grooves of the fiber are dense and deep, more micropores exist inside the fiber, and the surface smoothness and the internal compactness of the fiber are obviously inferior to those of the fiber prepared by a wet spinning process with an organic solvent system such as DMAC (dimethylacetamide) or a dry spinning process with DMF as a solvent. Therefore, the fiber structure causes the incident light to generate diffuse reflection on the fiber, so that the glossiness of the fiber, yarn and fabric is poor, thereby limiting the application of the fiber structure in indoor decoration such as curtains and interior wall cloth.
Current methods for improving fiber gloss typically employ methods that adjust the spinning process or alter the cross-section of the fiber. For example, in the research on the factor analysis and improvement method of the influence on the gloss of acrylic fibers by the NaSCN method in the 9 th phase 2010 of synthetic fibers, the processes of moderating the solidification condition of NaSCN, adjusting the draft multiple, drying by hot rollers and the like are adopted, the gloss of the acrylic fibers is improved by improving the crystallinity and the orientation, and the gloss of the fabric reaches 9.3-9.4. A similar method is also proposed in the research on improving the gloss of NaSCN wet acrylic fibers in No. 2 of 2014, which shows that: the fiber prepared by the common NaSCN process has a circular cross section and the glossiness of only 6.58, the cross section of the fiber is changed into a spindle shape by adjusting the solidification forming process, the improvement on the glossiness is limited (the glossiness is 7.64), and the final product still cannot meet the application requirement of ornaments.
The special-shaped section acrylic fiber is mainly obtained through two modes, one mode is that the fiber is produced through an organic solvent system wet spinning process and a dry spinning process, the fiber section shapes are respectively kidney-shaped and dog bone-shaped, and the other mode is that the fiber with flat section can be produced by adjusting the coagulation forming conditions in the wet spinning process, the special fur-like material can be produced, and the fibers with special-shaped section have stronger glossiness than the fibers with circular section because the flat surface reflects incident light to form parallel regular reflection light. For example, the glossiness of the fabric made of the Tailoren fiber is 9.7 as mentioned in the research on the analysis and improvement method of the influence factors of the acrylic fiber glossiness by the NaSCN method in the No. 9 of 2010 synthetic fiber.
In addition, theoretically, the addition of a high molecular additive is also an improvement mode, but the additive needs to meet the requirements that the refractive index of the additive is close to that of the fiber and the size of the additive needs to be close to that of micropores, so that the research on the additive capable of effectively improving the gloss of polyacrylonitrile fiber in practical application is rarely reported, and only in the research on the impact factor analysis and improvement method of the acrylic fiber gloss by the NaSCN method in the 9 th phase of 2010 of synthetic fiber, the treatment is carried out by adopting a high molecular nonionic surfactant in the state of fiber gel, but the improvement is not obvious, and the fabric gloss is only improved by 0.1-0.2%.
Therefore, the research on the high-glossiness acrylic yarn with obviously improved glossiness and the preparation method thereof have very important significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the high-glossiness acrylic yarn with obviously improved glossiness and the preparation method thereof. The polyacrylonitrile fiber used for preparing the PAN-based carbon fiber precursor has high acrylonitrile content (usually more than 98 wt%), small proportion of comonomer, good macromolecular regularity and high polymer molecular weight, and in addition, the solid content of the spinning solution is high (usually more than 19 wt%), the spinning process adopts water washing stretching and steam stretching, and the fiber orientation and crystallinity are high by combining drying densification and other modes, so that the regular reflection light on the surface of the fiber is enhanced, the diffuse reflection is reduced, and the fiber glossiness is greatly improved. Therefore, by utilizing the excellent luster performance of the precursor and combining the excellent dyeing property and spinnability of the ordinary acrylic fiber by the NaSCN method, the novel recycling use of the foreign fiber such as carbon fiber precursor and the like can be developed, and the acrylic fiber yarn with improved luster for the decoration field can also be developed.
In order to achieve the purpose, the invention adopts the technical scheme that:
the high-glossiness acrylic yarn is characterized in that the glossiness of a fabric made of the high-glossiness acrylic yarn is 10.8-12.5.
As a preferred technical scheme:
according to the high-glossiness acrylic yarn, the dyeing rate of the high-glossiness acrylic yarn dyed by a common acrylic fiber dyeing process is 78-84%.
The count of the high-glossiness acrylic yarn is 21 s/2-60 s/2, and the twist is 180-300 twists/m; the surface density of the fabric is 120-300 g/m2The fabric can be plain woven or twill woven, and is preferably plain woven.
The invention also provides a method for preparing the acrylic yarn with high glossiness, which comprises the steps of carrying out mixed spinning on the common acrylic yarn and the high gloss yarn by a NaSCN method to prepare the acrylic yarn with high glossiness; the high-gloss yarns are equal-grade foreign yarns and/or non-equal-grade foreign yarns of the PAN-based carbon fiber precursor, and the equal-grade foreign yarns of the PAN-based carbon fiber precursor are fibers with indexes exceeding the quality grade range of the precursor.
As a preferred technical scheme:
according to the method, the content of the high-gloss yarns in the high-gloss acrylic yarn is 5-20 wt%. The content of the high-gloss yarn is not limited to this range and may be increased or decreased as appropriate, but it is not too high or too low, the high-gloss yarn does not have a third monomer for assisting dyeing, too high content of the high-gloss yarn tends to result in low coloring ratio, and too low content of the high-gloss yarn tends to result in insignificant gloss improvement.
The method has the advantages that the lustrousness of the high-gloss yarn is 11.5-14.9, the fineness of the high-gloss yarn is 0.75-1.23 dtex, and the length of the high-gloss yarn after cutting is 38-65 mm; the gloss of the ordinary acrylic fiber of the NaSCN method is 6.6-8.1, the fineness of the ordinary acrylic fiber is 1.67-3.33 dtex, and the length of the ordinary acrylic fiber after cutting is 38-65 mm.
According to the method, the content of acrylonitrile in the high-gloss fiber is more than or equal to 97 wt%, and the content of acrylonitrile in the ordinary acrylic fiber of the NaSCN method is 90-91 wt%. The acrylonitrile content is high, the macromolecule regularity is good, the crystallization and orientation are high after the spinning multi-stage drafting, especially the steam drafting, and the contribution to the improvement of the glossiness is made.
According to the method, the off-grade filaments of the PAN-based carbon fiber precursor are prepared by spinning an organic solvent system, wherein the organic solvent is DMSO, DMAc or DMF, and the spinning method is wet spinning or dry jet wet spinning; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning.
According to the method, the off-grade filaments of the PAN-based carbon fiber precursor are prepared from spinning stock solution through solidification forming, water washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is more than or equal to 19.5 wt%.
The indexes are fineness, fineness CV value, breaking strength CV value and oil content, the fineness of the outer-quality fibers of the PAN-based carbon fiber protofilament is 0.75-1.23 dtex, the fineness CV value is not less than 5.0%, the breaking strength is 6.0-8.0 cN/dtex, the breaking strength CV value is not less than 5.0%, and the oil content is not more than 0.15 wt% or not more than 0.75 wt%.
The invention mechanism is as follows:
the gloss of the fiber is actually a common contribution of the regular reflection light, the surface scattering reflection light, and the scattering reflection light from the inside, and the gloss is better as the amount of the reflection light is larger. The ordinary acrylic fiber of the NaSCN method has the advantages that the grooves are densely distributed on the surface of the fiber, the internal pores are large, the regularity is low, and the directions of scattered reflected light on the surface and inside of the fiber are disordered and dispersed, so that the fiber shows poor luster. The high-gloss yarns (i.e. the equal-foreign yarns and/or the unequal-foreign yarns of the PAN-based carbon fiber protofilament) and the common acrylic fibers of the NaSCN method are blended in a certain proportion, on one hand, because the surface of the high-gloss yarns is smooth, when light enters, the regular reflection light on the surface of the fibers is enhanced, and meanwhile, the macromolecule arrangement regularity of the high-gloss yarns is good, the condition that the light entering the interior of the fibers is subjected to random reflection and diffuse scattering is reduced, so that the internal scattered reflection light is concentrated, the light intensity is increased, and the light intensity is increased to ensure that the fibers have good gloss and appearance; on the other hand, the protofilament with smooth surface and regular internal structure can receive scattered reflected light and transmitted light in disorder and multiple directions on the common acrylic fiber of the NaSCN method, thereby enhancing the reflected light and effectively improving the overall luster of the yarn. In addition, the combination also gives full play to the characteristic of good dyeing property of the common acrylic fibers of the NaSCN method, so that the yarn meets the requirement of colorful post-spun fabrics.
Has the advantages that:
the high-glossiness acrylic yarn and the preparation method thereof have simple operation, adopt the equal-exterior yarn/unequal-exterior yarn of the PAN-based carbon fiber protofilament and the common acrylic fiber of the NaSCN method for mixed spinning, the PAN-based carbon fiber protofilament has good glossiness and excellent performance, while the acrylic fiber prepared by the common NaSCN process has poor glossiness and excellent dyeing property and spinnability, the two yarns are spun at a proper proportion, the glossiness of the prepared acrylic yarn is greatly improved, the dyeing property is excellent, the new application of the equal-exterior yarn of the PAN-based carbon fiber protofilament and the like is developed, and the new application of the decorative material of the common acrylic fiber of the NaSCN method is developed.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
The preparation method of the high-glossiness acrylic yarn comprises the following steps: the high-glossiness acrylic yarn is prepared by carrying out mixed spinning on the other foreign filaments of the ordinary acrylic fiber and PAN-based carbon fiber precursor by a NaSCN method. Wherein, the content of the off-grade product silk of the PAN-based carbon fiber protofilament in the high-glossiness acrylic yarn is 5 wt%. The gloss of the extra-grade fibers of the PAN-based carbon fiber precursor was 11.5, the fineness was 1.22dtex, and the length after cutting was 38 mm; the gloss of the ordinary acrylic fiber of the NaSCN method is 6.6, the fineness is 3.33dtex, and the length after cutting is 38 mm; the acrylonitrile content in the extra-grade filaments of the PAN-based carbon fiber precursor is 98.5 wt%, and the acrylonitrile content in the common acrylic fibers of the NaSCN method is 90 wt%. The titer, titer CV value, breaking strength CV value and oil content of the equal-grade outer filaments of the PAN-based carbon fiber precursor are respectively 1.22dtex, 6.2 percent, 8.0cN/dtex, 5.0 percent and 0.80 percent by weight, and the equal-grade outer filaments are prepared by wet spinning a DMSO system; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning. The extra-grade yarns of the PAN-based carbon fiber protofilament are prepared from spinning stock solution through solidification forming, washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is 19.5 wt%.
The final gloss of the fabric made from the high gloss acrylic yarn was 10.8. The dyeing rate of the high-glossiness acrylic yarn dyed by the common acrylic fiber dyeing process is 84%. The count of the high-glossiness acrylic yarn is 40s/2, the twist is 180 twists/m, and the areal density of the fabric is 180g/m2。
Example 2
The preparation method of the high-glossiness acrylic yarn comprises the following steps: the high-glossiness acrylic yarn is prepared by carrying out mixed spinning on the other foreign filaments of the ordinary acrylic fiber and PAN-based carbon fiber precursor by a NaSCN method. Wherein the content of the extra-grade yarns of the PAN-based carbon fiber protofilament in the high-glossiness acrylic yarn is 8 wt%. The glossiness of the extra-grade yarns of the PAN-based carbon fiber precursor yarn is 12.2, the fineness of the extra-grade yarns is 0.75dtex, and the length of the extra-grade yarns after cutting is 51 mm; the gloss of the ordinary acrylic fiber of the NaSCN method is 7.3, the fineness is 1.67dtex, and the length after cutting is 51 mm; the acrylonitrile content in the extra-grade filaments of the PAN-based carbon fiber precursor is 97.4 wt%, and the acrylonitrile content in the ordinary acrylic fibers of the NaSCN method is 90.5 wt%. The titer, titer CV value, breaking strength CV value and oil content of the equal-grade outer filaments of the PAN-based carbon fiber protofilament are respectively 0.75dtex, 5.0 percent, 7.5cN/dtex, 6.3 percent and 0.15 percent by weight, and the equal-grade outer filaments are prepared by a DMAc system through wet spinning; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning. The extra-grade yarns of the PAN-based carbon fiber protofilament are prepared from spinning stock solution through solidification forming, washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is 25 wt%.
The final gloss of the fabric made from the high gloss acrylic yarn was 11.3. The dyeing rate of the high-glossiness acrylic yarn dyed by the common acrylic fiber dyeing process is 82.5%. The count of the high-glossiness acrylic yarn is 60s/2, the twist is 220 twists/m, and the surface density of the fabric is 195g/m2。
Example 3
The preparation method of the high-glossiness acrylic yarn comprises the following steps: the high-glossiness acrylic yarn is prepared by carrying out mixed spinning on the other foreign filaments of the ordinary acrylic fiber and PAN-based carbon fiber precursor by a NaSCN method. Wherein the content of the off-grade filaments of the PAN-based carbon fiber precursor in the high-glossiness acrylic yarn is 12 wt%. The glossiness of the equal-grade outer yarn of the PAN-based carbon fiber precursor is 13.0, the fineness of the equal-grade outer yarn is 1.23dtex, the length of the equal-grade outer yarn after cutting is 65mm, the glossiness of the ordinary acrylic fiber of the NaSCN method is 6.9, the fineness of the equal-grade outer yarn is 2.78dtex, and the length of the equal-grade outer yarn after cutting is 65 mm; the acrylonitrile content in the extra-grade filaments of the PAN-based carbon fiber precursor is 98 wt%, and the acrylonitrile content in the common acrylic fibers of the NaSCN method is 90.2 wt%. The titer, titer CV value, breaking strength CV value and oil content of the equal-grade outer filaments of the PAN-based carbon fiber precursor are respectively 1.23dtex, 5.8 percent, 6.0cN/dtex, 5.0 percent and 0.75 percent by weight, and the equal-grade outer filaments are prepared by wet spinning a DMF system; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning. The extra-grade yarns of the PAN-based carbon fiber protofilament are prepared from spinning stock solution through solidification forming, washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is 30 wt%.
The final gloss of the fabric made from the high gloss acrylic yarn was 11.6. The dyeing rate of the high-glossiness acrylic yarn dyed by the common acrylic fiber dyeing process is 79%. The count of the high-glossiness acrylic yarn is 32s/2, the twist is 270 twists/m, and the areal density of the fabric is 300g/m2。
Example 4
The preparation method of the high-glossiness acrylic yarn comprises the following steps: the high-glossiness acrylic yarn is prepared by carrying out mixed spinning on the other foreign filaments of the ordinary acrylic fiber and PAN-based carbon fiber precursor by a NaSCN method. Wherein, the content of the off-grade product silk of the PAN-based carbon fiber protofilament in the high-glossiness acrylic yarn is 20 wt%. The glossiness of the extra-grade yarns of the PAN-based carbon fiber precursor is 14.9, the fineness of the extra-grade yarns is 1.22dtex, the length after cutting is 38mm, the glossiness of the ordinary acrylic fibers of the NaSCN method is 7.7, the fineness of the ordinary acrylic fibers is 2.22dtex, and the length after cutting is 38 mm; the acrylonitrile content in the extra-grade filaments of the PAN-based carbon fiber precursor is 97 wt%, and the acrylonitrile content in the common acrylic fibers of the NaSCN method is 91 wt%. The titer, titer CV value, breaking strength CV value and oil content of the equal-grade outer filaments of the PAN-based carbon fiber precursor are respectively 1.22dtex, 6.8 percent, 6.5cN/dtex, 7.5 percent and 0.13 percent by weight, and the equal-grade outer filaments are prepared by spinning a DMSO system through a dry-spray-wet method; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning. The extra-grade yarns of the PAN-based carbon fiber protofilament are prepared from spinning stock solution through solidification forming, washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is 20 wt%.
The final gloss of the fabric made from the high gloss acrylic yarn was 12.5. The dyeing rate of the high-glossiness acrylic yarn dyed by the common acrylic fiber dyeing process is 78%. The count of the high-glossiness acrylic yarn is 48s/2, the twist is 190 twists/m, and the surface density of the fabric is 150g/m2。
Example 5
The preparation method of the high-glossiness acrylic yarn comprises the following steps: and (2) carrying out mixed spinning on the equal-grade outer yarn and the unequal-grade outer yarn of the ordinary acrylic fiber and the PAN-based carbon fiber precursor by a NaSCN method to obtain the high-glossiness acrylic yarn, wherein the content of the mixed fiber of the equal-grade outer yarn and the unequal-grade outer yarn of the PAN-based carbon fiber precursor in the high-glossiness acrylic yarn is 15 wt%, and the mass ratio of the equal-grade outer yarn to the unequal-grade outer yarn is 1: 1. The glossiness of the mixture of the equal-exterior yarns and the unequal-exterior yarns of the PAN-based carbon fiber precursor is 13.1, the length after cutting is 65mm, and the fineness of the equal-exterior yarns and the unequal-exterior yarns of the PAN-based carbon fiber precursor are both 1.20 dtex; the gloss of the ordinary acrylic fiber of the NaSCN method is 8.1, the fineness is 3.31dtex, and the length after cutting is 65 mm; the acrylonitrile content in the mixture of the equal-grade and non-equal-grade outer yarns of the PAN-based carbon fiber precursor is 97.6 wt%, and the acrylonitrile content in the common acrylic fiber of the NaSCN method is 90.8 wt%. The titer, titer CV value, breaking strength CV value and oil content of the equal-grade outer filaments of the PAN-based carbon fiber protofilament are respectively 1.20dtex, 6.0 percent, 7.0cN/dtex, 5.5 percent and 0.90 percent by weight, and the equal-grade outer filaments are prepared by a DMAc system through wet spinning; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning. The extra-grade yarns of the PAN-based carbon fiber protofilament are prepared from spinning stock solution through solidification forming, washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is 26 wt%.
The final gloss of the fabric made from the high gloss acrylic yarn was 11.9. High glossThe dyeing rate of the acrylic yarn dyed by the common acrylic fiber dyeing process is 80 percent. The count of the high-glossiness acrylic yarn is 21s/2, the twist is 200 twists/m, and the surface density of the fabric is 210g/m2。
Example 6
The preparation method of the high-glossiness acrylic yarn comprises the following steps: and (2) carrying out mixed spinning on the equal-grade outer yarn and the unequal-grade outer yarn of the ordinary acrylic fiber and the PAN-based carbon fiber precursor by a NaSCN method to obtain the high-glossiness acrylic yarn, wherein the content of the mixed fiber of the equal-grade outer yarn and the unequal-grade outer yarn of the PAN-based carbon fiber precursor in the high-glossiness acrylic yarn is 13 wt%, and the mass ratio of the equal-grade outer yarn to the unequal-grade outer yarn is 1: 1. The glossiness of the mixture of the equal-exterior yarn and the unequal-exterior yarn of the PAN-based carbon fiber precursor is 13.3, the length after cutting is 51mm, the fineness of the equal-exterior yarn and the unequal-exterior yarn of the PAN-based carbon fiber precursor are both 1.22dtex, the glossiness of the ordinary acrylic fiber of the NaSCN method is 7.2, the fineness is 2.20dtex, and the length after cutting is 51 mm; the acrylonitrile content in the mixture of the equal-grade and non-equal-grade outer yarns of the PAN-based carbon fiber precursor is 98.2 wt%, and the acrylonitrile content in the common acrylic fiber of the NaSCN method is 90.7 wt%. The titer, titer CV value, breaking strength CV value and oil content of the equal-grade outer filaments of the PAN-based carbon fiber precursor are respectively 1.22dtex, 5.0 percent, 6.9cN/dtex, 6.0 percent and 0.78 percent by weight, and the equal-grade outer filaments are prepared by wet spinning a DMF system; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning. The extra-grade yarns of the PAN-based carbon fiber protofilament are prepared from spinning stock solution through solidification forming, washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is 31 wt%.
The final gloss of the fabric made from the high gloss acrylic yarn was 11.5. The dyeing rate of the high-glossiness acrylic yarn dyed by the common acrylic fiber dyeing process is 79.5%. The count of the high-glossiness acrylic yarn is 50s/2, the twist is 300 twists/m, and the surface density of the fabric is 250g/m2。
Example 7
The preparation method of the high-glossiness acrylic yarn comprises the following steps: the unequal foreign yarns of the ordinary acrylic fibers and PAN-based carbon fiber protofilaments obtained by the NaSCN method are spun to obtain the acrylic yarn with high glossiness. Wherein, the content of the unequal foreign filament of the PAN-based carbon fiber protofilament in the high-glossiness acrylic yarn is 10 wt%. The gloss of the non-equal outer yarn of the PAN-based carbon fiber precursor is 12.5, the fineness of the non-equal outer yarn is 1.11dtex, the length of the non-equal outer yarn after cutting is 51mm, the gloss of the ordinary acrylic fiber of the NaSCN method is 6.7, the fineness of the ordinary acrylic fiber is 1.65dtex, and the length of the non-equal outer yarn after cutting is 51 mm; the content of acrylonitrile in the extra-grade filaments of the PAN-based carbon fiber precursor is 97.5 wt%, the content of acrylonitrile in the ordinary acrylic fibers of the NaSCN method is 90.6 wt%, the extra-grade filaments of the PAN-based carbon fiber precursor are fibers with the indexes of titer, titer CV value, breaking strength CV value and oil content exceeding the mass grade range of the precursor, the titer, titer CV value, breaking strength CV value and oil content of the extra-grade filaments of the PAN-based carbon fiber precursor are respectively 1.11dtex, 6.5%, 7.1cN/dtex, 7.5% and 0.85 wt%, and the extra-grade filaments are prepared by a DMSO system through wet spinning; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning. The extra-grade yarns of the PAN-based carbon fiber protofilament are prepared from spinning stock solution through solidification forming, washing drafting, hot roller drying densification, steam drafting, oiling and heat setting, wherein the solid content of the spinning stock solution is 20.2 wt%.
The final gloss of the fabric made from the high gloss acrylic yarn was 11.0. The dyeing rate of the high-glossiness acrylic yarn dyed by the common acrylic fiber dyeing process is 81%. The count of the high-glossiness acrylic yarn is 60s/2, the twist is 180 twists/m, and the areal density of the fabric is 120g/m2。
Claims (10)
1. The preparation method of the high-glossiness acrylic yarn is characterized by comprising the following steps: carrying out mixed spinning on the common acrylic fibers and the high-gloss yarns by a NaSCN method to obtain high-gloss acrylic yarns; the high-gloss yarns are equal-grade foreign yarns and/or non-equal-grade foreign yarns of the PAN-based carbon fiber precursor, and the equal-grade foreign yarns of the PAN-based carbon fiber precursor are fibers with indexes exceeding the quality grade range of the precursor.
2. The method for preparing the acrylic yarn with high glossiness as claimed in claim 1, wherein the content of the high gloss yarn in the acrylic yarn with high glossiness is 5-20 wt%.
3. The method for producing high-gloss acrylic yarn according to claim 2, wherein the high-gloss yarn has a gloss of 11.5 to 14.9, a fineness of 0.75 to 1.23dtex, and a length after cutting of 38 to 65 mm; the gloss of the ordinary acrylic fiber of the NaSCN method is 6.6-8.1, the fineness of the ordinary acrylic fiber is 1.67-3.33 dtex, and the length of the ordinary acrylic fiber after cutting is 38-65 mm.
4. The method for preparing acrylic yarn with high glossiness according to claim 3, wherein the content of acrylonitrile in the high glossiness yarn is not less than 97 wt%, and the content of acrylonitrile in the ordinary acrylic yarn of NaSCN method is 90-91 wt%.
5. The method for preparing acrylic yarn with high glossiness according to claim 4, wherein the off-grade yarns of the PAN-based carbon fiber precursor are spun by an organic solvent system, the organic solvent is DMSO, DMAc or DMF, and the spinning method is wet spinning or dry jet wet spinning; the common acrylic fiber of the NaSCN method is prepared by a NaSCN aqueous solution system through wet spinning.
6. The method for producing acrylic yarn with high gloss as claimed in claim 5, wherein the off-grade filaments of the PAN-based carbon fiber precursor are produced by coagulation forming, water washing drawing, hot roll drying densification, steam drawing, oiling and heat setting of a spinning dope, and the solid content of the spinning dope is not less than 19.5 wt%.
7. The method for preparing acrylic yarn with high gloss according to claim 1, wherein the index is fineness, fineness CV value, breaking strength CV value and oil content, the fineness of the outer yarn of the PAN-based carbon fiber precursor is 0.75-1.23 dtex, the fineness CV value is not less than 5.0%, the breaking strength is 6.0-8.0 cN/dtex, the breaking strength CV value is not less than 5.0%, and the oil content is not more than 0.15 wt% or not more than 0.75 wt%.
8. The method for producing high-gloss acrylic yarn according to any one of claims 1 to 7, characterized in that: the glossiness of the fabric made of the high-glossiness acrylic yarns is 10.8-12.5.
9. The method for preparing the acrylic yarn with high glossiness as claimed in claim 8, wherein the dyeing rate of the acrylic yarn with high glossiness after being dyed by a common acrylic fiber dyeing process is 78-84%.
10. The method for producing high-gloss acrylic yarn according to claim 8, wherein the high-gloss acrylic yarn has a count of 21s/2 to 60s/2 and a twist of 180 to 300 twists/m; the surface density of the fabric is 120-300 g/m2。
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| US5108838A (en) * | 1991-08-27 | 1992-04-28 | E. I. Du Pont De Nemours And Company | Trilobal and tetralobal filaments exhibiting low glitter and high bulk |
| JP2505352B2 (en) * | 1992-07-27 | 1996-06-05 | 鐘淵化学工業株式会社 | Composite flame retardant fiber |
| CN101475665A (en) * | 2009-01-13 | 2009-07-08 | 东华大学 | Preparation of polyacrylonitrile for high performance carbon fibre |
| CN102400234B (en) * | 2010-09-17 | 2013-10-23 | 中国石油化工股份有限公司 | Method for preparing polyacrylonitrile-based carbon fiber protofilament spinning stock solution |
| CN102011225B (en) * | 2010-10-27 | 2011-11-23 | 江南大学 | Heating blended yarn and spinning process thereof |
| CN104562270A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Wet spinning method for improving acrylic fiber glossiness |
| CN107190400B (en) * | 2017-05-27 | 2018-10-12 | 安徽桑尼旅游休闲用品有限公司 | A kind of high intensity outdoor goods fabric |
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