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A kind of 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 low dynamic viscosity of ethylene glycol, pigment agglomeration, small internal friction, etc., and achieve the effect of reducing adverse effects, reducing decarboxylation reaction, and reducing color difference

Active Publication Date: 2021-12-21
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 colored low-melting polyester fiber, which adopts the method of dope coloring, adds an acid-base regulator to low-melting polyester; spins according to the FDY process to obtain colored low-melting polyester fiber; colored low-melting The polyester segment of the melting point polyester fiber comprises a terephthalic acid segment, an isophthalic acid segment, an ethylene glycol segment and a diethylene glycol segment; the acid-base regulator is aluminum hydroxide or hydrogen Zinc oxide; Color difference ΔE≤0.25 of colored low melting point polyester fiber. The linear density deviation rate of the colored low-melting polyester fiber is ≤1.0%, the breaking strength is ≥3.60cN / dtex, the breaking strength CV value is ≤8.0%, the breaking elongation is 45.0±5.0%, and the breaking elongation CV value is ≤10.0 %. The preparation method of a kind of colored low-melting point polyester fiber of the present invention adopts acid-base regulator, helps to reduce the decarboxylation reaction of isophthalic acid, reduces the adverse effect on molecular weight and molecular weight distribution of low melting point, adopts ortho Diisooctyl phthalate is a wetting agent and dispersant for pigments, which can reduce the color difference of fibers.

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 Patents(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