A modifier for viscose fiber production

Abstract

This invention relates to the field of viscose fiber technology, specifically to a modifier for viscose fiber production. The main component of the modifier for viscose fiber production is N-tallow-based propylenediamine polyoxyethylene ether, which can inhibit the regeneration of cellulose xanthate. This invention also discloses an optimal formulation, which is a mixture of N-tallow-based propylenediamine polyoxyethylene ether, polyethylene glycol, and water. Polyethylene glycol improves the water solubility of N-tallow-based propylenediamine polyoxyethylene ether, and water reduces the viscosity of the formulation, facilitating industrial use. The modifier disclosed in this invention can significantly improve the quality of viscose solutions. Compared with existing modifiers, the spinning performance of viscose solutions is significantly improved after adding the modifier of this invention, significantly increasing viscose fiber production efficiency and product quality.

Description

Technical Field

[0001] This invention relates to the field of viscose fiber technology, and more specifically to a modifier for viscose fiber production. Background Technology

[0002] The chemical reaction in the viscose process is based on a simple reaction between alkali cellulose and proton-loving carbon disulfide to produce xanthate esters. Cellulose xanthate esters dissolve in dilute caustic soda to obtain a viscose solution. This solution is extruded through fine spinnerets into an acid bath, regenerating cellulose into filaments, which are then called viscose fibers. During viscose fiber production, the addition of various chemical auxiliaries has a significant effect on improving the production process and enhancing the quality of the finished product.

[0003] Certain auxiliaries are added to the viscose solution before spinning. Fibers spun from viscose modified in this way exhibit improved physical properties (high strength, high wet modulus, etc.). These auxiliaries are collectively referred to as modifiers based on their characteristics. Modifiers can inhibit the regeneration of cellulose xanthate, adjust the ratio of diffusion rate of coagulant components, formation rate of macromolecular aggregates, and precipitation rate in the longitudinal velocity field, delay cellulose regeneration, promote an increase in fiber cortex thickness, improve fiber orientation, enable nascent fibers to withstand greater tensile stress, and significantly improve the physical and mechanical properties of the fibers.

[0004] Currently, there are many types of denaturants, which can be mainly classified into the following categories: fatty amines and cyclic fatty amines, polyamine compounds, polyoxyethylene and its condensates with fatty amines, fatty alcohols, fatty acids or amides, ethylene dithiol, imidazole and their derivatives. Among them, amine compounds and polyoxyethylene derivatives are the most prevalent. They are mostly cationic or amphoteric surfactants, and their terminal active groups can effectively inhibit hydrogen ion penetration into the gel interior and delay the formation of cellulose xanthate.

[0005] With the rapid development of China's textile industry, the demand for high-performance viscose fibers is constantly increasing, driving the sustained growth of the viscose fiber modifier market. However, the performance of existing modifiers is still not high. Therefore, developing a new generation of high-performance modifiers is beneficial to improving viscose fiber production efficiency and product quality, and promoting industrial upgrading. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-performance modifier for viscose fiber production.

[0007] The objective of this invention is achieved through the following technical solution: a modifier for viscose fiber production, comprising at least N-tallow-based propylene diamine polyoxyethylene ether, wherein the chemical structural formula of the N-tallow-based propylene diamine polyoxyethylene ether is shown in formula (I):

[0008]

[0009] Where x, y, and z are all positive integers, and x + y + z = 10.

[0010] As a preferred technical solution, it also includes polyethylene glycol and water.

[0011] As a preferred technical solution, it is composed of the following raw materials in parts by weight: N-tallow-based propylene diamine polyoxyethylene ether: 60-85, polyethylene glycol: 10-30, and water: 5-10.

[0012] As a more preferred technical solution, it is composed of the following raw materials in parts by weight: N-tallow-based propylene diamine polyoxyethylene ether: 60, polyethylene glycol: 30, water: 10.

[0013] As a preferred technical solution, the polyethylene glycol is at least one of PEG-200, PEG-300, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000 or PEG-3000.

[0014] As a preferred technical solution, the amount of the denaturant used is 0.05-5% of the mass of cellulose.

[0015] This invention has the following advantages: It discloses a high-performance modifier for viscose fiber production, with N-tallow-based propylene glycol polyoxyethylene ether as its main component, which can inhibit the regeneration of cellulose xanthate. The invention also discloses an optimal formulation, a mixture of N-tallow-based propylene glycol polyoxyethylene ether, polyethylene glycol, and water. Polyethylene glycol improves the water solubility of N-tallow-based propylene glycol polyoxyethylene ether, and water reduces the viscosity of the formulation, facilitating industrial use. The modifier disclosed in this invention can significantly improve the quality of viscose solutions. Compared to existing modifiers, the spinning performance of viscose solutions is significantly improved after adding the modifier of this invention, resulting in a substantial increase in viscose fiber production efficiency and product quality. Detailed Implementation

[0016] The present invention will be further described below with reference to embodiments, but the scope of protection of the present invention is not limited to the following description:

[0017] Example 1: A modifier for viscose fiber production, which consists of the following raw materials in parts by weight: N-tallow-based propylene diamine polyoxyethylene ether: 60, polyethylene glycol: 10, water: 5.

[0018] Among them, the chemical structural formula of N-tallow-based propylene diamine polyoxyethylene ether is shown in formula (Ⅰ):

[0019]

[0020] In the formula, x+y+z=10, which is obtained by controlling the molar ratio of N-tallow-based propylenediamine to ethylene oxide to 1:10 during production.

[0021] The polyethylene glycol is PEG-200; when using it, the substances in the formula are mixed and stirred evenly, and the modifier is added to the viscose solution before spinning. The amount of the modifier used is 0.05% of the cellulose mass.

[0022] Example 2: A modifier for viscose fiber production, comprising the following parts by weight of raw materials:

[0023] N-Tallow-based Propylene Diamine Polyoxyethylene Ether: 60, Polyethylene Glycol: 30, Water: 10.

[0024] Among them, the chemical structural formula of N-tallow-based propylene diamine polyoxyethylene ether is shown in formula (Ⅰ):

[0025]

[0026] In the formula, x+y+z=10, which is obtained by controlling the molar ratio of N-tallow-based propylenediamine to ethylene oxide to 1:10 during production.

[0027] The polyethylene glycol is a mixture of PEG-300 and PEG-400 in a weight ratio of 1:1. When using it, the substances in the formula are mixed and stirred evenly. The modifier is added to the viscose solution before spinning. The amount of the modifier used is 5% of the mass of cellulose.

[0028] Example 3: A modifier for viscose fiber production, which is composed of the following raw materials in parts by weight: N-tallow-based propylene diamine polyoxyethylene ether: 85, polyethylene glycol: 10, water: 5.

[0029] Among them, the chemical structural formula of N-tallow-based propylene diamine polyoxyethylene ether is shown in formula (Ⅰ):

[0030]

[0031] In the formula, x+y+z=10, which is obtained by controlling the molar ratio of N-tallow-based propylenediamine to ethylene oxide to 1:10 during production.

[0032] The polyethylene glycol is a mixture of PEG-600, PEG-800 and PEG-1000 in a weight ratio of 2:1:1. When using it, the substances in the formula are mixed and stirred evenly. The modifier is added to the viscose solution before spinning. The amount of the modifier used is 0.3% of the cellulose mass.

[0033] Example 4: A modifier for viscose fiber production, which consists of the following raw materials in parts by weight: N-tallow-based propylene diamine polyoxyethylene ether: 72, polyethylene glycol: 20, water: 8.

[0034] Among them, the chemical structural formula of N-tallow-based propylene diamine polyoxyethylene ether is shown in formula (Ⅰ):

[0035]

[0036] In the formula, x+y+z=10, which is obtained by controlling the molar ratio of N-tallow-based propylenediamine to ethylene oxide to 1:10 during production.

[0037] The polyethylene glycol is a mixture of PEG-2000 and PEG-3000 in a weight ratio of 3:2. When using it, the substances in the formula are mixed and stirred evenly. The modifier is added to the viscose solution before spinning. The amount of the modifier used is 3% of the mass of cellulose.

[0038] The following experiments illustrate the beneficial effects of this invention:

[0039] 1. Experimental Methods:

[0040] Before spinning, the denaturant of Example 3 was added to the viscose solution, wherein N-tallow-based propylene diamine polyoxyethylene ether (x+y+z=10) (ADT-10) was a commercially available product (Shandong Xingguang Chemical Co., Ltd.), and the denaturant accounted for 0.3% of the cellulose mass; the viscose solution without the added denaturant served as the control group.

[0041] 2. Experimental Results:

[0042] (1) Quality assessment test of adhesive solution

[0043] The quality of the adhesive solution is mainly evaluated using the following methods: adhesive viscosity is measured using the falling ball viscometer method; maturity is tested using the ammonium chloride method; the number of undissolved particles is determined by observation under a microscope at 10x objective, recording the number of particles larger than 15µm, and calculating the average value from multiple fields of view; filterability is measured by the volume (cm³) of adhesive with a height of 300mm passing through a metal filter (200 mesh, 38mm diameter) within 10 minutes. 3 The test results are shown in Table 1.

[0044] Table 1: Results of the quality assessment test for adhesive solutions

[0045]

[0046] As can be seen from Table 1, the addition of the denaturant of this invention significantly improves the quality of the adhesive solution.

[0047] (2) Fiber quality assessment test

[0048] The above viscose solution was spun, and the fiber properties were tested. The results are shown in Table 2.

[0049] Table 2: Results of Fiber Quality Assessment Tests

[0050]

[0051] As can be seen from Table 2, the spinning performance of the viscose solution with the addition of the modifier of the present invention is significantly improved.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, are covered within the scope of protection of the present invention.

Claims

1. A modifier for viscose fiber production, characterized in that, It is composed of the following raw materials in parts by weight: N-tallow-based propylene diamine polyoxyethylene ether: 60-85, polyethylene glycol: 10-30, water: 5-10; The chemical structural formula of the N-tallow-based propylene diamine polyoxyethylene ether is shown in Formula (Ⅰ): Where x, y, and z are all positive integers, and x + y + z = 10.

2. The modifying agent for viscose fiber production according to claim 1, characterized in that, It is composed of the following raw materials in parts by weight: N-tallow-based propylene diamine polyoxyethylene ether: 60, polyethylene glycol: 30, water:

10.

3. A modifying agent for viscose fiber production according to claim 1 or 2, characterized in that, The polyethylene glycol is at least one of PEG-200, PEG-300, PEG-400, PEG-600, PEG-800, PEG-1000, PEG-1500, PEG-2000 or PEG-3000.

4. A modifying agent for viscose fiber production according to claim 1, characterized in that, The amount of the denaturant used is 0.05 to 5% of the cellulose mass.

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