Tencel crosslinking anti-fibrillation method

Abstract

The invention belongs to the technical field of tencel fabrics, and particularly relates to a tencel crosslinking anti-fibrillation method which comprises the following steps: carrying out preliminary splitting treatment in a splitting agent and an alkaline environment; dispersing and softening under the action of lauryl sodium sulfate and a softening agent; and adding a cross-linking solution, and carrying out heat preservation treatment and heating treatment to obtain the anti-fibrillation tencel. The anti-fibrillation tencel solves the problems that existing tencel is extremely prone to splitting and pilling, and impressions and wearing are affected, preliminary splitting is conducted in an alkaline environment, dispersing and softening are conducted in an acid environment, and the anti-fibrillation tencel is obtained after cross-linking treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of Tencel fabrics, and particularly relates to a Tencel cross-linking and anti-fibrillation method. Background Art

[0002] Tencel fiber is a man-made cellulose fiber. The production process is environmentally friendly and pollution-free, and it has excellent performance and has attracted much attention. It has a unique soft and smooth feel, good moisture absorption and air permeability, and is called "breathing fiber". Therefore, Tencel fiber is an ideal clothing fabric for all kinds of suits, popular fashions, professional wear, pants, etc. in spring, autumn and summer. The fibrillation of Tencel fiber can split into fine microfibers on the surface, and bring a more delicate feel, increase skin-friendly feeling and comfort. However, the fibrillation will produce long fibrils while producing fine microfibers. The long fibrils are very easy to entangle and pill, which not only reduces the wearing comfort, but also has a very poor appearance. Summary of the invention

[0003] In view of the problems in the prior art, the present invention provides a method for cross-linking and anti-fibrillation of Tencel, which solves the problem that the existing Tencel is very easy to open and pill, affecting the appearance and wearing experience. The fibers are initially opened in an alkaline environment, dispersed and softened in an acidic environment, and the anti-fibrillation Tencel is obtained after cross-linking treatment.

[0004] In order to achieve the above technical objectives, the technical solution of the present invention is:

[0005] A method for cross-linking and preventing fibrillation of tencel comprises the following steps:

[0006] Step 1, adding uncrosslinked Tencel into water and stirring thoroughly to form a slurry, then adding a fiber opening agent, adjusting the pH, and drying after heat preservation for 2-4 hours to obtain a preliminary fiber opening Tencel, the bath ratio of the slurry is 10-15, the stirring speed is 400-600r / min, the fiber opening agent is TD-60M, and the amount of the fiber opening agent added is 2-4% of the mass of the uncrosslinked Tencel, the pH adjustment is sodium hydroxide, and the concentration of sodium hydroxide is 4-9g / L, and the temperature of the heat preservation treatment is 80-90°C; this step uses distilled water as a solvent, and is combined with a fiber opening agent and sodium hydroxide to form a composite fiber opening material, and the uncrosslinked Tencel is preliminarily opened as much as possible to improve the initial fiber opening rate of the uncrosslinked Tencel; further, the uncrosslinked Tencel is singed before use;

[0007] Step 2, putting the preliminary opened Tencel into water and stirring it thoroughly to form a slurry, then adding sodium dodecyl sulfate and a softener, and obtaining the pre-crosslinked Tencel after pH adjustment and heat preservation treatment, the bath ratio of the slurry is 10-15, the stirring speed is 200-400r / min, the amount of sodium dodecyl sulfate added is 3-6% of the mass of the preliminary opened Tencel, the softener adopts FREETEX-6101 of Senico, and the amount added is 2-3% of the mass of the preliminary opened Tencel, the adjusted pH is 5-6, and the temperature of the heat preservation treatment is 50-60°C; this step utilizes the dispersibility of sodium dodecyl sulfate to improve the dispersibility of the fluff on the surface of the preliminary opened Tencel, and softens the fluff with the softener to achieve full dispersion of the fluff, and at the same time, the pH is adjusted to acidic, which can achieve deep fiber opening of the preliminary opened Tencel in an acidic environment, and maintain the optimal stable state of the softener, thereby achieving excellent softening effect;

[0008] Step 3, adding the pre-cross-linked Tencel to water to form a slurry, adding Dye Bath Treasure C and the cross-linking liquid for constant temperature treatment for 2-4h, heating treatment for 1-2h, washing and drying to obtain the anti-fibrillation Tencel, the bath ratio of the pre-cross-linked Tencel in water is 1:3-8, the amount of Dye Bath Treasure C added is 0.0035-0.0055L / L; the mass ratio of the cross-linking liquid is: 2-4 parts of aziridine, 0.1-0.3 parts of triglycidyl isocyanurate, 4-6 parts of ethanol, and the amount of the cross-linking liquid added to the slurry is 50-120g / L, the temperature of the constant temperature treatment is 20-40°C, the pH is 8-10, and the temperature of the heating treatment is 70-80 ℃, pH is 4-6, this step utilizes the pre-dissolution of the cross-linking agent in ethanol to form a dispersion, ensuring that it quickly acts on the pre-cross-linked Tencel after the slurry is dispersed, cross-linking and curing the fluff on the surface of the Tencel, and forming a cross-linking layer on the surface of the Tencel, effectively reducing the permeability of the Tencel to penetrate into the fiber opening, thereby achieving the purpose of anti-fibrillation; the cross-linking liquid uses ethanol as the dissolving liquid, which can ensure the rapid dispersion of aziridine and triglycidyl isocyanurate, and also solves the solubility temperature of triglycidyl isocyanurate in water, and triglycidyl isocyanurate and aziridine adopt a dual-system cross-linking structure to completely cross-link and fix the open Tencel fluff in an acid-base environment.

[0009] It can be seen from the above description that the present invention has the following advantages:

[0010] 1. The present invention solves the problem that the existing Tencel is very easy to open and pill, which affects the appearance and wearing experience. The fibers are initially opened in an alkaline environment, dispersed and softened in an acidic environment, and the anti-fibrillation Tencel is obtained after cross-linking treatment.

[0011] 2. The present invention uses sodium dodecyl sulfate for dispersion treatment to completely open the fluff in the open-fiber Tencel, thereby achieving dispersion of the fluff, removing impurities, and combining with a softener to completely dye the fluff, providing conditions for subsequent cross-linking penetration.

[0012] 3. The composite cross-linking system of the present invention is mainly composed of aziridine and supplemented by triglycidyl isocyanurate, which forms different adhesion cross-linking effects on the surface of the fluff. At the same time, triglycidyl isocyanurate forms a multifunctional combination under the doping of aziridine, and forms a staggered cross-linking cure in combination with its own molecular size, effectively forming a cross-linking layer on the surface of Tencel, which prevents penetration and deep fiber opening. DETAILED DESCRIPTION

[0013] The present invention is described in detail with reference to the embodiments, but no limitation is imposed on the claims of the present invention.

[0014] Example 1

[0015] A method for cross-linking and preventing fibrillation of tencel comprises the following steps:

[0016] Step 1, adding uncrosslinked Tencel into water and stirring thoroughly to form a slurry, then adding a fiber opening agent, adjusting the pH, and drying after heat preservation for 2 hours to obtain preliminary fiber opening Tencel, the bath ratio of the slurry is 10, the stirring speed is 400r / min, the fiber opening agent is TD-60M, and the amount of the fiber opening agent added is 2% of the mass of the uncrosslinked Tencel, the pH adjustment is sodium hydroxide, and the concentration of sodium hydroxide is 4g / L, and the temperature of the heat preservation treatment is 80°C; the uncrosslinked Tencel is singed before use;

[0017] Step 2, putting the preliminary opened Tencel into water and stirring it thoroughly to form a slurry, then adding sodium dodecyl sulfate and a softener, and obtaining the pre-crosslinked Tencel after pH adjustment and heat preservation treatment, the bath ratio of the slurry is 10, the stirring speed is 200r / min, the amount of sodium dodecyl sulfate added is 3% of the mass of the preliminary opened Tencel, the softener is FREETEX-6101 of Seneco, and the amount added is 2% of the mass of the preliminary opened Tencel, the adjusted pH is 6, and the temperature of the heat preservation treatment is 50°C;

[0018] Step 3, add the pre-cross-linked Tencel into water to form a slurry, and add Dye Bath C and the cross-linking liquid for constant temperature treatment for 2 hours, temperature treatment for 1-h, and wash and dry to obtain the anti-fibrillation Tencel. The bath ratio of the pre-cross-linked Tencel in water is 1:3, the amount of Dye Bath C added is 0.0035L / L, the mass ratio of the cross-linking liquid is: 2 parts of aziridine, 0.1 parts of triglycidyl isocyanurate, and 4 parts of ethanol, and the amount of the cross-linking liquid added to the slurry is 50g / L, the temperature for constant temperature treatment is 20°C, the pH is 8, the temperature for temperature treatment is 70°C, and the pH is 6.

[0019] Example 2

[0020] A method for cross-linking and preventing fibrillation of tencel comprises the following steps:

[0021] Step 1, adding uncrosslinked Tencel into water and stirring thoroughly to form a slurry, then adding a fiber opening agent, adjusting the pH, and drying after heat preservation for 4 hours to obtain preliminary fiber opening Tencel, the bath ratio of the slurry is 15, the stirring speed is 600r / min, the fiber opening agent is TD-60M, and the amount of the fiber opening agent is 4% of the mass of the uncrosslinked Tencel, the pH adjustment is sodium hydroxide, and the concentration of sodium hydroxide is 9g / L, and the temperature of the heat preservation treatment is 90°C; the uncrosslinked Tencel is singed before use;

[0022] Step 2, putting the preliminary opened Tencel into water and stirring it thoroughly to form a slurry, then adding sodium dodecyl sulfate and a softener, and obtaining the pre-crosslinked Tencel after pH adjustment and heat preservation treatment, the bath ratio of the slurry is 15, the stirring speed is 400r / min, the amount of sodium dodecyl sulfate added is 6% of the mass of the preliminary opened Tencel, the softener is FREETEX-6101 of Seneco, and the amount added is 3% of the mass of the preliminary opened Tencel, the adjusted pH is 6, and the temperature of the heat preservation treatment is 60°C;

[0023] Step 3, add the pre-cross-linked Tencel into water to form a slurry, and add Dye Bath C and the cross-linking liquid for constant temperature treatment for 4 hours, temperature treatment for 2 hours, and wash and dry to obtain the anti-fibrillation Tencel. The bath ratio of the pre-cross-linked Tencel in water is 1:8, the amount of Dye Bath C added is 0.0055L / L, the mass ratio of the cross-linking liquid is: 4 parts of aziridine, 0.3 parts of triglycidyl isocyanurate, and 6 parts of ethanol, and the amount of the cross-linking liquid added to the slurry is 120g / L, the temperature for constant temperature treatment is 40°C, the pH is 10, the temperature for temperature treatment is 80°C, and the pH is 6.

[0024] Example 3

[0025] A method for cross-linking and preventing fibrillation of tencel comprises the following steps:

[0026] Step 1, adding uncrosslinked Tencel into water and stirring thoroughly to form slurry, then adding a fiber opening agent, adjusting the pH, and drying after heat preservation for 3 hours to obtain preliminary fiber opening Tencel, the bath ratio of the slurry is 13, the stirring speed is 500r / min, the fiber opening agent is TD-60M, and the amount of the fiber opening agent added is 3% of the mass of the uncrosslinked Tencel, the pH adjustment is sodium hydroxide, and the concentration of sodium hydroxide is 7g / L, and the temperature of the heat preservation treatment is 85°C; the uncrosslinked Tencel is singed before use;

[0027] Step 2, putting the preliminary opened Tencel into water and stirring it thoroughly to form a slurry, then adding sodium dodecyl sulfate and a softener, and obtaining the pre-crosslinked Tencel after pH adjustment and heat preservation treatment, the bath ratio of the slurry is 12, the stirring speed is 300r / min, the amount of sodium dodecyl sulfate added is 5% of the mass of the preliminary opened Tencel, the softener is FREETEX-6101 of Seneco, and the amount of addition is 3% of the mass of the preliminary opened Tencel, the adjusted pH is 6, and the temperature of the heat preservation treatment is 55°C;

[0028] Step 3, add the pre-cross-linked Tencel into water to form a slurry, and add Dye Bath C and the cross-linking liquid for constant temperature treatment for 3 hours, heat treatment for 2 hours, and wash and dry to obtain the anti-fibrillation Tencel. The bath ratio of the pre-cross-linked Tencel in water is 1:6, the amount of Dye Bath C added is 0.0045L / L, the mass ratio of the cross-linking liquid is: 3 parts of aziridine, 0.2 parts of triglycidyl isocyanurate, and 5 parts of ethanol, and the amount of the cross-linking liquid added to the slurry is 100g / L, the temperature for constant temperature treatment is 30°C, the pH is 9, the temperature for heat treatment is 75°C, and the pH is 5.

[0029] Comparative Example 1

[0030] Comparative Example 1 uses commercially available cross-linked Tencel.

[0031] Performance Testing

[0032] The products of Examples 1-3 and Comparative Examples 1-2 were woven into fabrics, and used as test samples to compare the anti-fibrillation effects:

[0033]

[0034] From the above comparison, it can be seen that the anti-fibrillation Tencel prepared by the present technical solution has a good feel, and still maintains good softness after washing 50 times. The mechanical properties and color fastness are not inferior to those of Comparative Example 1 (commercially available cross-linked Tencel), which meets the market demand.

[0035] It is understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A method for cross-linking and preventing fibrillation of Tencel, Features: The steps include: Step 1, adding uncrosslinked Tencel into water and stirring thoroughly to form a slurry, then adding a fiber opening agent, adjusting the pH, and drying after heat preservation for 2-4 hours to obtain a preliminary opened Tencel; Step 2, putting the preliminarily opened Tencel into water and stirring it thoroughly to form a slurry, then adding sodium lauryl sulfate and a softener, and obtaining the pre-crosslinked Tencel after pH adjustment and heat preservation treatment; Step 3, adding the pre-cross-linked Tencel into water to form a slurry, adding Dye Bath Treasure C and the cross-linking liquid to treat at a constant temperature for 2-4 hours, heating for 1-2 hours, and washing and drying to obtain the anti-fibrillation Tencel.

2. The method for preventing fibrillation of Tencel cross-linking according to claim 1, Features: The bath ratio of the slurry in step 1 is 10-15, the stirring speed is 400-600r / min, the fiber opening agent is TD-60M, and the amount of the fiber opening agent added is 2-4% of the mass of the uncross-linked Tencel, and the pH adjustment is sodium hydroxide, and the concentration of sodium hydroxide is 4-9g / L.

3. The method for preventing fibrillation of Tencel cross-linking according to claim 1, Features: The temperature of the heat preservation treatment in step 1 is 80-90°C.

4. The method for preventing fibrillation of Tencel cross-linking according to claim 1, Features: The uncross-linked Tencel in step 1 is singed before use.

5. The method for preventing fibrillation of Tencel cross-linking according to claim 1, Features: The bath ratio of the slurry in step 2 is 10-15, and the stirring speed is 200-400r / min.

6. The method for preventing fibrillation of Tencel cross-linking according to claim 1, Features: The amount of sodium dodecyl sulfate added in step 2 is 3-6% of the mass of the initially opened Tencel. The softener is FREETEX-6101 produced by Senico, and the amount added is 2-3% of the mass of the initially opened Tencel. The adjusted pH is 5-6, and the temperature of the heat preservation treatment is 50-60°C.

7. The method for preventing fibrillation of Tencel cross-linking according to claim 1, Features: The bath ratio of the pre-crosslinked Tencel in water in step 3 is 1:3-8.

8. The method for preventing fibrillation of Tencel by cross-linking according to claim 1, Features: The amount of Dye Bath C added in step 3 is 0.0035-0.0055 L / L, the mass ratio of the cross-linking liquid is: 2-4 parts of aziridine, 0.1-0.3 parts of triglycidyl isocyanurate, 4-6 parts of ethanol, and the amount of the cross-linking liquid added to the slurry is 50-120 g / L.

9. The method for preventing fibrillation of Tencel cross-linking according to claim 1, Features: The temperature of the constant temperature treatment in step 3 is 20-40°C, the pH is 8-10, and the temperature of the temperature increase treatment is 70-80°C, the pH is 4-6.

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