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Preparation method of colored low-melting-point polyester fiber

A low-melting point polyester and fiber technology, applied in the field of polyester fiber, can solve the problems of pigment agglomeration, unsatisfactory dispersion, and small internal friction

Active Publication Date: 2021-05-07
扬州富威尔复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process, ethylene glycol is mostly used as the liquid dispersion medium. On the one hand, the dynamic viscosity of ethylene glycol is small, and the internal friction generated by the interaction with the pigment is small, and the dispersibility is not ideal; on the other hand, it is When adding the pigment slurry for esterification, the temperature is higher than the boiling point of ethylene glycol, which may cause the agglomeration of the pigment, resulting in uneven production of polyester pigments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A kind of preparation method of colored low melting point polyester fiber, concrete steps are as follows:

[0051] (1) Add the pigment to diisooctyl phthalate, and ball mill at 78°C for 9 hours to obtain a pigment slurry; wherein, the pigment is Pigment Red 5, and the mass ratio of pigment to diisooctyl phthalate is is 20:100;

[0052] (2) After terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, aluminum hydroxide, ethylene glycol antimony and triphenyl phosphate are mixed uniformly, carry out esterification reaction, the temperature of esterification reaction is 250°C, the termination condition of the esterification reaction is: when the amount of water distilled in the esterification reaction reaches 95% of the theoretical value;

[0053] The molar ratio of terephthalic acid, isophthalic acid, ethylene glycol and diethylene glycol is 1:0.3:2.0:0.20;

[0054] The add-on of aluminum hydroxide is 1% of the molar number of isophthalic acid add-on; ...

Embodiment 2

[0061] A kind of preparation method of colored low melting point polyester fiber, concrete steps are as follows:

[0062] (1) Add the pigment to diisooctyl phthalate, and ball mill at 84°C for 10 hours to obtain a pigment slurry; wherein, the pigment is Pigment Red 5, and the mass ratio of pigment to diisooctyl phthalate is for 21:100;

[0063] (2) After terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, aluminum hydroxide, ethylene glycol antimony and triphenyl phosphate are mixed uniformly, carry out esterification reaction, the temperature of esterification reaction is 252°C, the termination condition of the esterification reaction is: when the amount of water distilled in the esterification reaction reaches 96% of the theoretical value;

[0064] The molar ratio of terephthalic acid, isophthalic acid, ethylene glycol and diethylene glycol is 1:0.4:2.1:0.21;

[0065] The add-on of aluminum hydroxide is 1% of the molar number of isophthalic acid add-on...

Embodiment 3

[0072] A kind of preparation method of colored low melting point polyester fiber, concrete steps are as follows:

[0073] (1) Add the pigment to diisooctyl phthalate, and ball mill at 70°C for 10 hours to obtain a pigment slurry; wherein, the pigment is Pigment Red 5, and the mass ratio of pigment to diisooctyl phthalate is is 22:100;

[0074] (2) After terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, aluminum hydroxide, ethylene glycol antimony and triphenyl phosphate are mixed uniformly, carry out esterification reaction, the temperature of esterification reaction is 254°C, the termination condition of the esterification reaction is: when the amount of water distilled in the esterification reaction reaches 97% of the theoretical value;

[0075] The molar ratio of terephthalic acid, isophthalic acid, ethylene glycol and diethylene glycol is 1:0.5:2.2:0.22;

[0076] The add-on of aluminum hydroxide is 1% of the molar number of isophthalic acid add-on;...

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Abstract

The invention relates to a preparation method of a colored low-melting-point polyester fiber. The preparation method adopts a stock solution coloring method and comprises the following steps of adding an acid-base regulator into low-melting-point polyester; performing spinning according to an FDY process to prepare the colored low-melting-point polyester fiber, wherein a polyester chain segment of the colored low-melting-point polyester fiber comprises a terephthalic acid chain segment, an isophthalic acid chain segment, an ethylene glycol chain segment and a diethylene glycol chain segment; the acid-base regulator is aluminum hydroxide or zinc hydroxide; the chromatic aberration delta E of the colored low-melting-point polyester fiber is less than or equal to 0.25; and the linear density deviation ratio of the colored low-melting-point polyester fiber is smaller than or equal to 1.0%, the breaking strength is larger than or equal to 3.60 cN / dtex, the breaking strength CV value is smaller than or equal to 8.0%, the breaking elongation is 45.0 + / -5.0%, and the breaking elongation CV value is smaller than or equal to 10.0%. According to the preparation method of the colored low-melting-point polyester fiber, the acid-base regulator is adopted, the decarboxylation reaction of isophthalic acid is reduced, the adverse effects on the low-melting-point molecular weight and molecular weight distribution are reduced, and the color difference of the fiber can be reduced by adopting the diisooctyl phthalate as a wetting agent and a dispersing agent of the pigment.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers and relates to a preparation method of colored low-melting polyester fibers. Background technique [0002] Low-melting point polyester has good compatibility with conventional polyester. Under the condition of lower heating temperature, the skin layer melts and the core layer still maintains the physical structure. After cooling, it produces good adhesion and has high bonding strength. It can replace the traditional glue. , so it has the characteristics of low hot-melt bonding temperature, fast bonding and high peel strength, and is widely used in silk-like cotton, filter materials, shoe materials, mattresses and other fields. [0003] Colored low-melting polyester fiber is a special variety. Since it cannot be prepared by dyeing, it is usually achieved by adding masterbatch. Due to the uneven dispersion of pigments, the color difference of the fiber is obvious, which affects the quality ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/04D01F1/10C08G63/672
CPCD01F6/92D01F1/04D01F1/10C08G63/672
Inventor 朱兴荣苗绕忠石宇
Owner 扬州富威尔复合材料有限公司