Printed acrylic fabric and production process thereof
By using a steaming process to swell acrylic fibers under humid and hot conditions, and utilizing the ionic bonds between cationic dyes and the acidic groups of the fibers, the problems of uneven coloring and colorfastness in the acrylic dyeing process are solved, and the clarity of printed patterns and color fastness are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN HUAFENG NEW MATERIALS
- Filing Date
- 2025-12-29
- Publication Date
- 2026-05-08
AI Technical Summary
In the process of dyeing acrylic fibers, improper heating rate can easily lead to uneven coloring. Existing technology requires strict control of heating rate and time, high equipment requirements, and it is difficult to avoid the problem of uneven dyeing.
The acrylic fiber is printed using a steam method under humid and hot conditions. The positively charged cationic dye is bonded to the negatively charged acidic groups of the fiber through ionic bonds, thereby achieving the diffusion and curing of the dye inside the fiber.
Under humid and hot conditions, acrylic fibers swell, and the dye diffuses into the fiber interior and combines with acidic groups to achieve the required color fastness. The printed pattern is clear, the color is bright, and the color fastness is good.
Smart Images
Figure CN121992672A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the textile field, and in particular to a printed acrylic fabric and its production process. Background Technology
[0002] Acrylic fiber is an important synthetic fiber, often called "artificial wool" due to its wool-like properties. Because negatively charged acidic groups (called "dye seats") are introduced during the manufacturing process of acrylic fibers, cationic dyes are primarily used for dyeing. Cationic dyes ionize in water to produce positively charged pigment cations. In the dye bath, these cations combine through ionic bonds to achieve the dyeing effect. Simultaneously, dye molecules can also enter the amorphous regions of the fiber through van der Waals forces.
[0003] Acrylic fibers have an important temperature parameter called the glass transition temperature (Tg), which is typically between 75-85°C. When the temperature is below Tg, the fiber molecular chains are "frozen," making it difficult for dyes to penetrate the fiber. When the temperature exceeds Tg, the fiber macromolecular chains begin to move violently, instantly increasing the gaps between fibers, allowing the dye to diffuse rapidly into the fiber interior. If the temperature rises too quickly, the dye will rush into the fiber in a very short time. The rate of dye diffusion cannot keep up with the rate of adsorption, and the fiber surface will be instantly saturated with dye while the interior has not yet been dyed, resulting in "dye spots" (uneven dyeing). Once cationic dyes bind to the fiber, they are very difficult to desorb. Therefore, once color spots occur due to excessively rapid heating near Tg, it is very difficult to repair them by simply extending the dyeing time.
[0004] Therefore, in acrylic fiber dyeing, it is necessary to strictly control the heating rate to avoid color unevenness. This dyeing control requires a relatively long time and precise time control, which places high demands on the dyeing equipment. Summary of the Invention
[0005] In view of the above problems, this application provides a new printed acrylic fabric and its production process, which achieves the dyeing of acrylic fibers through a simple steaming method and meets the color fastness requirements.
[0006] The first aspect of this application provides a manufacturing process for printed acrylic fabric, including the following steps:
[0007] Preparation of printing paste: The modified starch paste is mixed with cationic dye and soft water and stirred evenly to obtain a printing paste with a viscosity of 4000-6000 CPS; The modified starch paste is prepared by the following steps: Soft water and modified paste powder are mixed and stirred evenly to obtain starch paste, and tartaric acid, glacial acetic acid and glycerol are added to the starch paste while stirring to obtain a modified starch paste with a viscosity of 8000-10000 CPS;
[0008] Printing: The acrylic fabric is printed with printing paste to obtain the printed fabric;
[0009] Drying: The printed fabric is dried to remove moisture and prevent the pattern from bleeding; the dried fabric is obtained.
[0010] Steaming: The dried fabric is steamed with saturated steam at 102-105℃ for 20-30 minutes to obtain the steamed fabric;
[0011] Washing: The steamed fabric is washed to obtain a washed fabric;
[0012] Setting: After the washed fabric is dried, it is heat-set to obtain the printed acrylic fabric.
[0013] Unlike existing technologies, this technical solution involves steaming the printed acrylic fabric. Under steaming and humid heat conditions, the acrylic fibers swell, and the positively charged dye ions and the negatively charged acidic groups of the fibers are strongly and quantitatively bonded together through ionic bonds. The cationic dye diffuses into the fiber interior and binds with the acidic groups to solidify, achieving the required color fastness.
[0014] Furthermore, in the paste preparation step, the printing paste contains 80-85% modified starch paste, 0-6% dye, and the remainder is soft water.
[0015] Furthermore, in the slurry preparation step, the modified starch slurry contains 10-15% modified aleurone powder, 0.8-1% tartaric acid, 0.8-1% glacial acetic acid, 4-5% glycerol, and the remainder is soft water.
[0016] Furthermore, the printing step is performed using rotary screen printing.
[0017] Furthermore, in the printing step, the machine speed is 20-30 m / min.
[0018] Furthermore, in the drying step, the drying temperature is 120-130℃.
[0019] Furthermore, in the steaming step, the dried fabric is steamed with saturated steam at 102-105℃ for 20-30 minutes.
[0020] Furthermore, the washing step includes, in sequence, cold water soaping, hot water soaping, clean water washing, and dehydration and drying.
[0021] Furthermore, the cold water soaping uses a soap concentration of 2g / L, a washing time of 8-12 minutes, and is repeated twice; the hot water soaping uses a soap concentration of 2g / L, a soaping time of 15-20 minutes at 60℃, and is repeated twice; the clean water washing uses a washing time of 3-5 minutes and is repeated once.
[0022] Furthermore, in the shaping step, the heat setting temperature is 130-140℃.
[0023] The second aspect of this application provides a printed acrylic fabric, which is produced using the production process described in the first aspect of this application.
[0024] Unlike existing technologies, this technical solution uses steaming to cause the acrylic fibers to swell under humid and hot conditions. The dye diffuses into the fiber and combines with the acidic groups to solidify, resulting in clear printed patterns, vibrant colors, and good color fastness in the fabric.
[0025] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the textual description, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and accompanying drawings of this application. Attached Figure Description
[0026] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.
[0027] In the accompanying drawings of the instruction manual:
[0028] Figure 1 This is a photograph of the printed acrylic fabric prepared in Example 1. Detailed Implementation
[0029] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.
[0030] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0031] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.
[0032] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.
[0033] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.
[0034] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.
[0035] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.
[0036] The cationic dyes described in this application are also commonly referred to as basic dyes, which are a class of dyes that can dissociate into positively charged colored ions in aqueous solutions.
[0037] Rotary screen printing, as described in this application, is a very important and mainstream printing process in the modern textile printing and dyeing industry. Simply put, it is a technique that uses a seamless cylindrical screen for continuous printing. The core of rotary screen printing lies in "continuous rolling" and "precision ink transfer." This technology combines the high efficiency of cylindrical printing with the flexibility of flatbed printing, making it ideal for mass production.
[0038] The first aspect of this application provides a manufacturing process for printed acrylic fabric, including the following steps:
[0039] Preparation of printing paste: The modified starch paste is mixed with cationic dye and soft water and stirred evenly to obtain a printing paste with a viscosity of 4000-6000 CPS; The modified starch paste is prepared by the following steps: Soft water and modified paste powder are mixed and stirred evenly to obtain starch paste, and tartaric acid, glacial acetic acid and glycerol are added to the starch paste while stirring to obtain a modified starch paste with a viscosity of 8000-10000 CPS;
[0040] Printing: The acrylic fabric is printed with printing paste to obtain the printed fabric;
[0041] Drying: The printed fabric is dried to remove moisture and prevent the pattern from bleeding; the dried fabric is obtained.
[0042] Steaming: The dried fabric is steamed with saturated steam at 102-105℃ for 20-30 minutes to obtain the steamed fabric;
[0043] Washing: The steamed fabric is washed to obtain a washed fabric;
[0044] Setting: After the washed fabric is dried, it is heat-set to obtain the printed acrylic fabric.
[0045] Unlike existing technologies, this technical solution involves adding cationic dyes to the printing paste and then steaming the acrylic fabric after printing. Under the humid and hot steaming conditions, the acrylic fibers swell, and the positively charged dye ions and the negatively charged acidic groups of the fibers are strongly and quantitatively bonded together through ionic bonds. The cationic dye diffuses into the interior of the fiber and combines with the acidic groups to solidify, thus achieving the required color fastness.
[0046] Furthermore, in the paste preparation step, the printing paste contains 80% modified starch paste, 0-6% dye, and the remainder is soft water.
[0047] Furthermore, in the slurry preparation step, the modified starch slurry contains 10-15% modified aleurone powder, 0.8-1% tartaric acid, 0.8-1% glacial acetic acid, 4-5% glycerol, and the remainder is soft water.
[0048] Furthermore, the printing step is performed using rotary screen printing.
[0049] Furthermore, in the printing step, the machine speed is 20-30 m / min.
[0050] Furthermore, in the drying step, the drying temperature is 120-130℃.
[0051] Furthermore, in the steaming step, the dried fabric is steamed with saturated steam at 102-105℃ for 20-30 minutes.
[0052] Furthermore, the washing step includes, in sequence, cold water soaping, hot water soaping, clean water washing, and dehydration and drying.
[0053] Furthermore, the cold water soaping uses a soap concentration of 2g / L, a washing time of 8-12 minutes, and is repeated twice; the hot water soaping uses a soap concentration of 2g / L, a soaping time of 15-20 minutes at 60℃, and is repeated twice; the clean water washing uses a washing time of 5 minutes and is repeated once.
[0054] Furthermore, in the shaping step, the heat setting temperature is 130-140℃.
[0055] The second aspect of this application provides a printed acrylic fabric, which is produced using the production process described in the first aspect of this application.
[0056] Unlike existing technologies, this technical solution uses steaming to cause the acrylic fibers to swell under humid and hot conditions. The dye diffuses into the fiber and combines with the acidic groups to solidify, resulting in clear printed patterns, vibrant colors, and good color fastness in the fabric.
[0057] In this embodiment, the modified paste powder is M8 modified paste powder from Guangzhou Tianhao Materials Technology Co., Ltd., the cationic dye is CATIONIC BLUEC X-BL cationic blue from Foshan Tianran Trading Co., Ltd., and the soaping agent is Huntsman's ALBATEX AD soaping agent.
[0058] In this embodiment, to ensure the uniformity of the paste, M8 modified paste powder is added while stirring soft water during the preparation of the starch paste, and the stirring time is 30-50 minutes; during the preparation of the printing paste, other components are added while stirring the starch paste, and the stirring time is 3-5 minutes.
[0059] Example 1: A printed acrylic fabric
[0060] Preparation of starch paste: Mix 840g of soft water with 100g of modified paste powder and stir for 40 minutes to obtain a starch paste; while stirring, add 9g of tartaric acid, 9g of glacial acetic acid and 42g of glycerol to the starch paste and stir for 5 minutes to obtain a modified starch paste with a viscosity of 8000-10000 CPS.
[0061] Mix 800g of modified starch paste with 60g of cationic dye and 140g of soft water until homogeneous to obtain a printing paste with a viscosity of 4000-6000 CPS.
[0062] Printing: The acrylic fabric is printed with printing paste at a speed of 20 m / min to obtain the printed fabric;
[0063] Drying: The printed fabric is dried at 120°C to obtain the dried fabric;
[0064] Steaming: The dried fabric is steamed with saturated steam at 102℃ for 30 minutes to obtain the steamed fabric;
[0065] Washing: Washing the steamed fabric, including:
[0066] Wash with cold water and soap at a concentration of 2 g / L for 10 minutes, repeat twice.
[0067] Wash with hot water and soap at a concentration of 2g / L for 15 minutes at 60℃, repeat twice.
[0068] The washing time with clean water is 5 minutes, and the washing is repeated once; the resulting fabric is washed.
[0069] Setting: After the washed fabric is dried, it is heat-set at 130℃ to obtain the printed acrylic fabric, as shown in the photo. Figure 1 As shown.
[0070] Example 2: A printed acrylic fabric
[0071] Preparation of starch paste: Mix 834g of soft water with 100g of modified paste powder and stir for 40 minutes to obtain starch paste; while stirring, add 8g of tartaric acid, 8g of glacial acetic acid and 50g of glycerol to the starch paste and stir for 5 minutes to obtain modified starch paste with a viscosity of 8000-10000 CPS.
[0072] Mix 800g of modified starch paste with 50g of cationic dye and 150g of soft water until homogeneous to obtain a printing paste with a viscosity of 4000-6000 CPS.
[0073] Printing: The acrylic fabric is printed with printing paste at a speed of 30 m / min to obtain the printed fabric;
[0074] Drying: The printed fabric is dried at 130°C to obtain the dried fabric;
[0075] Steaming: The dried fabric is steamed with saturated steam at 102℃ for 30 minutes to obtain the steamed fabric;
[0076] Washing: Washing the steamed fabric, including:
[0077] Wash with cold water and soap at a concentration of 2 g / L for 10 minutes, repeat twice.
[0078] Wash with hot water and soap at a concentration of 2g / L for 20 minutes at 60℃, repeat twice.
[0079] The washing time with clean water is 3 minutes, and the washing is repeated once; the resulting fabric is washed.
[0080] Setting: After the washed fabric is dried, it is heat-set at 140°C to obtain the printed acrylic fabric.
[0081] Example 3: A printed acrylic fabric
[0082] Preparation of starch paste: Mix 780g of soft water with 150g of modified paste powder and stir for 40 minutes to obtain a starch paste; while stirring, add 10g of tartaric acid, 10g of glacial acetic acid and 50g of glycerol to the starch paste and stir for 4 minutes to obtain a modified starch paste with a viscosity of 8000-10000 CPS.
[0083] Mix 850g of modified starch paste with 30g of cationic dye and 120g of soft water until homogeneous to obtain a printing paste with a viscosity of 4000-6000 CPS.
[0084] Printing: The acrylic fabric is printed with printing paste at a speed of 25 m / min to obtain the printed fabric;
[0085] Drying: The printed fabric is dried at 125°C to obtain the dried fabric;
[0086] Steaming: The dried fabric is steamed with saturated steam at 105℃ for 25 minutes to obtain the steamed fabric;
[0087] Washing: Washing the steamed fabric, including:
[0088] Wash with cold water and soap at a concentration of 2 g / L for 12 minutes, repeating twice.
[0089] Wash with hot water and soap at a concentration of 2g / L for 16 minutes at 60℃, repeat twice.
[0090] The washing time with clean water is 4 minutes, and the wash is repeated once; the resulting fabric is washed.
[0091] Setting: After the washed fabric is dried, it is heat-set at 135°C to obtain the printed acrylic fabric.
[0092] Example 4: A printed acrylic fabric
[0093] Preparation of starch paste: Mix 817g of soft water with 120g of modified paste powder and stir for 40 minutes to obtain a starch paste; while stirring, add 9g of tartaric acid, 9g of glacial acetic acid and 45g of glycerol to the starch paste and stir for 5 minutes to obtain a modified starch paste with a viscosity of 8000-10000 CPS.
[0094] Mix 830g of modified starch paste with 20g of cationic dye and 150g of soft water until homogeneous to obtain a printing paste with a viscosity of 4000-6000 CPS.
[0095] Printing: The acrylic fabric is printed with printing paste at a speed of 25 m / min to obtain the printed fabric;
[0096] Drying: The printed fabric is dried at 125°C to obtain the dried fabric;
[0097] Steaming: The dried fabric is steamed with saturated steam at 103°C for 20 minutes to obtain the steamed fabric;
[0098] Washing: Washing the steamed fabric, including:
[0099] Wash with cold water and soap at a concentration of 2 g / L for 12 minutes, repeating twice.
[0100] Wash with hot water and soap at a concentration of 2g / L for 20 minutes at 60℃, repeat twice.
[0101] The washing time with clean water is 5 minutes, and the washing is repeated once; the resulting fabric is washed.
[0102] Setting: After the washed fabric is dried, it is heat-set at 140°C to obtain the printed acrylic fabric.
[0103] The color fastness of the printed acrylic fabrics prepared in Examples 1-4 was tested, and the results are shown in Table 1.
[0104] Table 1. Results of Colorfastness Test
[0105]
[0106] Among them, the color fastness to soap washing was tested according to the national standard GB / T3921.4-1997. The color fastness to dry / wet rubbing was tested according to the national standard GB / 3920. The color fastness to seawater immersion was tested according to the national standard AATCC106-2002. The color fastness to water immersion was tested according to JIS (37±2)℃×4h. The color fastness to sunlight was tested according to ISO105B02-1994. The color fastness to (alkaline) perspiration was tested according to the national standard ISO105-E04:2008.
[0107] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.
Claims
1. A production process for printed acrylic fabric, characterized in that, Includes the following steps: Preparation of printing paste: The modified starch paste is mixed with cationic dye and soft water and stirred evenly to obtain a printing paste with a viscosity of 4000-6000 CPS; The modified starch paste is prepared by the following steps: Soft water and modified paste powder are mixed and stirred evenly to obtain starch paste, and tartaric acid, glacial acetic acid and glycerol are added to the starch paste while stirring to obtain a modified starch paste with a viscosity of 8000-10000 CPS; Printing: The acrylic fabric is printed with printing paste to obtain the printed fabric; Drying: The printed fabric is dried to obtain the dried fabric; Steaming: The dried fabric is steamed with saturated steam at 102-105℃ for 20-30 minutes to obtain the steamed fabric; Washing: The steamed fabric is washed to obtain a washed fabric; Setting: After the washed fabric is dried, it is heat-set to obtain the printed acrylic fabric.
2. The production process according to claim 1, characterized in that, In the paste preparation step, the printing paste contains 80-85% modified starch paste, 0-6% cationic dye, and the remainder is soft water.
3. The production process according to claim 1, characterized in that, In the slurry preparation step, the modified starch slurry contains 10-15% modified aleurone powder, 0.8-1% tartaric acid, 0.8-1% glacial acetic acid, 4-5% glycerol, and the remainder is soft water.
4. The production process according to claim 1, characterized in that, The printing step is performed using rotary screen printing.
5. The production process according to claim 4, characterized in that, The printing process is carried out at a speed of 20-30 m / min.
6. The production process according to claim 1, characterized in that, The drying step is performed at a temperature of 120-130℃.
7. The production process according to claim 1, characterized in that, The washing steps include, in sequence, cold water soaping, hot water soaping, clean water rinsing, and dehydration and drying.
8. The production process according to claim 7, characterized in that, The cold water soaping process involves a soap concentration of 2 g / L, a washing time of 8-12 minutes, and two washes. The hot water soaping process involves a soap concentration of 2 g / L, a soaping time of 15-20 minutes at 60°C, and two washes. The clean water washing process involves a washing time of 3-5 minutes and one wash.
9. The production process according to claim 1, characterized in that, The heat setting temperature for the shaping step is 130-140℃.
10. A printed acrylic fabric, characterized in that, The printed acrylic fabric is produced using the production process described in any one of claims 1-9.