Double-cross sectional dark fiber and preparation method thereof

A font-shaped and cross-section technology, which is applied in the field of double cross-section fiber and its preparation, can solve the problems of poor color performance, waxy hand feeling, light appearance color, etc., so as to eliminate the waxy feeling on the surface, improve the moisture permeability, The effect of simple preparation method

Inactive Publication Date: 2015-04-22
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it is difficult to make a layered structure inside ordinary chemical fibers, especially the smooth surface of synthetic fibers, which makes the white light reflected by the outer surface of the fibers very strong. Disadvantages such as light or poor performance of showing true color, waxy hand feeling, etc.
Generally, methods such as composite spinning, surface treatment, improvement of dyeing and finishing process conditions, and addition of darkening agents can be used to obtain a better color darkening effect on polyester fiber surface fabrics. The implementation of these methods has a long process route and involves There are many process parameters that affect the color depth, and it is difficult to implement in engineering
In addition, colored polymer fiber filaments are prepared by adding dye particles in the polymer (US patent Office, Patent No.2165253; US patent Office, Patent No.2071250; US patent Office, Patent No.2071253; US patent Office, Patent No.2130253; US patent Office, Patent No.548701), and by adding chromophoric groups to prepare colored fibers and films by chemical synthesis or substitution with polymer groups (US patent Office, Patent No. .4242499; US patent Office, Patent No.944572; US patent Office, Patent No.976073; US patent Office, Patent No.3278486), but these methods will produce some by-products, and it is difficult to realize the color characteristics required by the design
[0006] Invention patent "a real-color multi-groove cross-section fiber and its preparation method" (application number: 201110243452.9), although the published method can improve the dark-color effect of the fiber, but the spinneret production technology is difficult and the cost performance is limited ; In addition, due to the limitation of the shape of the spinneret holes, the requirements for the control accuracy of the spinning process are relatively high, and the project implementation is difficult

Method used

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  • Double-cross sectional dark fiber and preparation method thereof
  • Double-cross sectional dark fiber and preparation method thereof
  • Double-cross sectional dark fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 50

[0031] Example 1 Preparation of 150dtex / 36f dark-color PET filament and its dark-color effect

[0032] Raw material: polyethylene terephthalate chip (hereinafter referred to as PET chip), intrinsic viscosity (0.678±0.015) dL / g, melting point 240~255℃

[0033] Spinneret design: the spinneret used in this embodiment is as image 3 As shown, 36 single fiber spinneret holes 2 are arranged on the spinneret 1 . The lateral dimension of spinneret 1 is as Figure 4A As shown, a stepped structure is adopted, and its thickness D is 15mm. Among them, the diameter d1 of the large cylinder part is 99.5±0.05mm, the diameter d2 of the small cylinder part is 89.6-90.2mm, and the thickness D1 of the small cylinder part is The diameter of the large hole d3 in the stepped hole is 18mm, the diameter of the small hole d4 is 11mm, and the diameter d5 of the inlet slot corresponding to each single fiber spinneret hole 2 is 12mm. Such as Figure 4BAs shown, the single fiber spinneret hole 2 is lo...

Embodiment 2 20

[0046] Example 2 Preparation of 120dtex / 36f dark-color filament and its dark-color effect

[0047] Raw material, spinneret, spinning equipment: with embodiment one

[0048] Spinning process: the difference from Example 1 is to reduce the extrusion rate of the spinning melt, and the spinning temperature of screw rod 2 and 3 zones and the spinneret assembly are all increased by 3 ° C, and the rest of the process is the same as in Example 1, so The linear density of the fiber can be reduced. PET control filaments of 120 dtex / 36f were spun with circular cross-section spinnerets under the same process equipment.

[0049] Preparation of woven fabric sample: same as in Example 1.

[0050] Dark color test results: The test results obtained by using the test method described in Example 1 are shown in Table 3. Compared with conventional round-section fiber fabrics, double-cross-section fiber fabrics have lower L and a values, and can obtain a more pure dark color effect. Both the K / S...

Embodiment 3 00

[0053] Example 3 Preparation of 100dtex / 36f dark-color filament and its dark-color effect

[0054] Design of spinneret hole size parameters: L=0.60±0.01mm, W=0.30±0.01mm, S=0.10±0.01mm, M=0.10±0.01mm for a single fiber spinneret hole, other parts of the spinneret design Same as Embodiment 1.

[0055] The raw materials, spinning equipment and spinning process are all the same as in Example 1; under the same process equipment, two kinds of PET comparison filaments of 100dtex / 36f were spun with the above-mentioned double cross spinneret and circular cross-section spinneret respectively.

[0056] Preparation of knitted fabrics: Since the warps of the two groups of woven fabrics prepared above are all round-section fibers, some round-section fibers will appear on the surface of the fabrics, which will weaken the dark effect of the double cross weft. In this embodiment, weft-knitted fabrics are made entirely of double cross fibers, and contrast knitted fabrics with the same structu...

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Abstract

The invention provides double-cross sectional dark fiber and a preparation method thereof. The double-cross sectional dark fiber is characterized in that the section of the fiber is in the shape of two double crosses or two parallel crosses. Another technical scheme provides the preparation method of the double-cross sectional dark fiber. The preparation method is characterized by including: firstly, performing melt spinning; and secondly, cooling by side blow, oiling, reeling to obtain pre-oriented yarns, and drafting to drawn yarns or elasticizing to obtain low stretch yarns, wherein each single-fiber orifice of a spinneret used in melt spinning is a main pore, and each main pore is in a structure of double crosses or two parallel crosses. The double-cross sectional dark fiber and the preparation method thereof have the advantages that the dyed fiber has deep and pure color, wet permeability of the fiber is improved, and surface waxiness is eliminated; the preparation method is simple, has low requirements on equipment and is available for large-scale production.

Description

technical field [0001] The invention relates to a special-shaped cross-section fiber and the field of preparation thereof, in particular to a double cross-section fiber with a characteristic of dark color and a preparation method thereof. Background technique [0002] Special-shaped fibers combine different fiber materials with rich cross-sectional shapes to greatly improve fiber performance. In 1953, DuPont (Du Pont) in the United States spun fibers with triangular cross-sections by the expansion and adhesion method, and proposed a composite spinning method to make composite fibers. After separating the way to manufacture special-shaped fibers, the patents for tetragonal cross-section wire (US patent Office, Patent No.3109220) and pentagonal cross-section wire (US patent Office, Patent No.3109768) were applied for. [0003] Since the late 1980s, Japan has been at the forefront of the world in the development and application of special-shaped fibers. The tooth-shaped cross-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/253D01D5/088D01F6/62D01F6/60
Inventor 王府梅刘晓松宁玉静
Owner DONGHUA UNIV
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