A machine-washable wool outdoor fabric and its preparation method

Abstract

This invention relates to a machine-washable wool outdoor fabric and its preparation method, belonging to the field of fabric preparation technology. The machine-washable wool outdoor fabric comprises a surface fabric woven from wool-wrapped recycled nylon yarn as warp and weft threads. The surface fabric undergoes the following dyeing and finishing treatment: low-temperature dyeing at 60-80℃ combined with high-temperature setting at 120-150℃ during the low-temperature dyeing process. The low-temperature dyeing is carried out in a dyeing system incorporating modified polythiol. This invention employs a low-temperature dyeing process and incorporates modified polythiol as a dyeing auxiliary agent into the dyeing system, which not only improves the dye uptake and colorfastness but also further enhances the fabric strength. Simultaneously, it can, to some extent, solve the problem of wool fabrics being not machine-washable and difficult to care for.

Description

Technical Field

[0001] This invention belongs to the field of fabric preparation technology, specifically relating to a machine-washable wool outdoor fabric and its preparation method. Background Technology

[0002] Wool yarn is a high-end fiber material commonly used in everyday clothing. However, because wool is less strong than other fibers and wool fabrics are generally not machine washable and difficult to care for, they are prone to deformation, shrinkage, and damage after washing. These reasons limit its application in outdoor fabrics.

[0003] When developing outdoor fabrics from wool yarn, it is generally considered to first blend wool yarn with other high-strength fibers to obtain blended yarn, and then use the blended yarn to weave fabric. This not only gives wool clothing the function of outdoor wear, but also helps to give full play to the advantages of wool materials such as moisture absorption, deodorization, lightweight and antibacterial properties.

[0004] Furthermore, conventional dyeing of wool fibers is carried out at temperatures above 98°C. Under humid heat, wool fibers expand to a certain extent and become looser, allowing dye molecules to easily diffuse through the wool's cuticle layer into the fiber interior. However, high-temperature dyeing is not only energy-intensive and costly, but it also damages the protein molecules of wool fibers, reducing wool strength and elasticity, thus affecting yield and product feel. Compared to conventional dyeing, low-temperature wool dyeing can reduce wool damage, decreasing yellowing and strength loss. However, low-temperature dyeing correspondingly suffers from poorer dye uptake and colorfastness. Summary of the Invention

[0005] The purpose of this invention is to provide a machine-washable wool outdoor fabric and its preparation method in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] As a first aspect of the present invention, the present invention provides a machine-washable wool outdoor fabric, the machine-washable wool outdoor fabric comprising a fabric woven from wool-wrapped recycled nylon yarn as warp and weft; wherein the fabric undergoes the following dyeing and finishing treatment: low-temperature dyeing at 60-80℃ combined with high-temperature setting at 120-150℃ during the low-temperature dyeing process, the low-temperature dyeing being carried out in a dyeing system containing modified polythiol.

[0008] As a further optimization of the present invention, the fiber composition of the fabric, by weight percentage, includes 65-75% wool and 25-35% recycled nylon.

[0009] As a further optimization of the present invention, the amount of modified polythiol incorporated into the dyeing system is 2-6% of the fabric mass.

[0010] As a further optimization of the present invention, the structure of the fabric also includes a bio-based TPU film laminated on the outer side of the fabric.

[0011] As a second aspect of the present invention, the present invention also provides a method for preparing machine-washable wool outdoor fabric as described in any of the above descriptions, specifically comprising the following steps:

[0012] (1) First, wool yarn is wrapped around recycled nylon yarn as the core to obtain wool-wrapped recycled nylon yarn, and then wool-wrapped recycled nylon yarn is used as warp and weft yarns to weave the face fabric.

[0013] (2) The fabric prepared in step (1) is placed in a dyeing system containing modified polythiol and dyed at low temperature at 60-80℃. At the same time, the fabric is subjected to high temperature setting at 100-120℃ during the low temperature dyeing process.

[0014] (3) The machine-washable wool outdoor fabric can be obtained by washing the dyed and finished fabric with soap, water and drying.

[0015] As a further optimization of the present invention, in step (1), the warp yarn weaving density is 50-75 yarns / inch, the weft yarn weaving density is 45-65 yarns / inch, and the fabric weaving structure is plain weave.

[0016] As a further optimization of the present invention, in step (2), the specific process of the low-temperature dyeing treatment is as follows: the surface is arranged in the dyeing system according to the bath ratio of 1kg:40-50L, the pH of the dyeing system is adjusted to 4.5-5.5, the dyeing temperature is 30-40℃, and the temperature is increased to 60-80℃ at a heating rate of 1-3℃ / min before dyeing, and the dyeing time is 60-100min.

[0017] As a further optimization of the present invention, in step (2), the timing of the high-temperature finishing is 30-50 minutes after the fabric begins low-temperature dyeing.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) The yarn used in the fabric of the present invention is wool-wrapped recycled nylon yarn with recycled nylon yarn as the core and wool wrapped around it. The high strength of the recycled nylon yarn can make up for the problem of insufficient strength of the wool yarn, and thus can give full play to the advantages of wool material such as moisture absorption, deodorization, light weight and antibacterial properties while giving wool clothing outdoor wear function.

[0020] (2) The present invention adopts a low-temperature dyeing process and incorporates modified polythiol as a dyeing auxiliary in the dyeing system. The thiol groups contained in the modified polythiol molecule can effectively open the disulfide bonds in the scale layer with high sulfur content, making the wool structure loose and improving the dyeing effect and dye fastness. In addition, due to the high molecular properties of the modified polythiol, when it is combined in the wool structure, it can further promote the improvement of the fabric strength.

[0021] (3) The present invention optimizes the dyeing system and combines low-temperature dyeing with high-temperature setting treatment to improve the fabric’s resistance to machine washing deformation and shrinkage, which to a certain extent solves the problem that wool fabric is not resistant to machine washing and is not easy to care for. Detailed Implementation

[0022] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] 1. Material Description

[0024] Unless otherwise specified, all methods used in the following examples can be performed using conventional methods. Other materials and reagents used can be obtained commercially unless otherwise specified.

[0025] Recycled nylon yarn and wool yarn were purchased from Shandong Huafang Spinning Co., Ltd.; bio-based TPU, a polyurethane elastomer polymerized from bio-based polyols and MDI, with a bio-based polyol content of approximately 65%, was purchased from BASF, Germany; Lanaset dye (Lanaset Black B), penetrant JFC, amphoteric surfactant BS-12, and emulsifier TO-5 were purchased from Gaide Chemicals; modified polythiol was purchased from Guangzhou Geling New Materials Co., Ltd.

[0026] 2. Method

[0027] 2.1 Preparation of the face fabric

[0028] Following the existing ring spinning process for preparing core-spun yarn, wool-wrapped recycled nylon yarn is obtained by wrapping wool yarn around recycled nylon yarn as the core. The fineness of the wool-wrapped recycled nylon yarn is 100 metric count, and the fineness of the recycled nylon yarn and wool yarn are selected based on the fineness of the wool-wrapped recycled nylon yarn. The fabric is then woven using the wool-wrapped recycled nylon yarn as both warp and weft. The warp yarn weaving density is 50-75 ends / inch, and the weft yarn weaving density is 45-65 ends / inch. The weave is plain weave. The fiber composition of the prepared fabric, by weight percentage, includes 65-75% wool and 25-35% recycled nylon.

[0029] To facilitate the optimization of the dyeing and finishing process described below, the preferred warp yarn weaving density is 60 yarns / inch, and the preferred weft yarn weaving density is 50 yarns / inch. The fiber composition of the fabric prepared at this weaving density includes 72% wool and 28% recycled nylon by weight percentage.

[0030] 2.2 Investigation into the Influence of Dyeing Systems on Fabric Dyeing Properties

[0031] (1) Prepare the staining system. The basic formula of the staining system is shown in Table 1.

[0032] Table 1. Basic formulation of the staining system

[0033]

[0034] To investigate the effect of the formulation composition of the dyeing system on the performance of the fabric after dyeing and finishing, modified polythiol was incorporated into the basic formulation of the dyeing system disclosed in Table 1 at 0.6%, 0.9%, and 1.2% of the fabric mass to prepare dyeing system AC. Additionally, DTT (dithiothreitol) was incorporated into the basic formulation of the dyeing system disclosed in Table 1 at 0.9% of the fabric mass to prepare dyeing system D. The dyeing system prepared according to the basic formulation disclosed in Table 1 was designated as the control dyeing system.

[0035] (2) Staining treatment

[0036] The pH of the dyeing system was adjusted to 5.5 using HAc-NaAc. Then, the fabric was placed in different dyeing systems at a liquor ratio of 1 kg: 50 L. The initial dyeing temperature was 40 °C. The temperature was increased to 80 °C at a rate of 3 °C / min, and the dyeing time was 60 min. Finally, the dyed and finished fabric was soaped, washed with water, and dried to obtain the machine-washable wool outdoor fabric, denoted as fabric AD and control fabric 1.

[0037] In addition, in order to compare the low-temperature dyeing process with the high-temperature dyeing process, the dyeing system was prepared according to the basic formula disclosed in Table 1 during the dyeing process, and the dyeing temperature was increased to 100°C. The fabric prepared in this way was designated as control fabric 2.

[0038] The prepared fabric AD and control fabrics 1-2 were tested for K / S value, color fastness to washing, and tensile strength. Additionally, a commercially available 100% pure wool fabric was dyed using the same method as fabric A to obtain a control fabric 3, which was also tested for K / S value, color fastness to washing, and tensile strength.

[0039] The K / S value was tested using an SF-600 computer colorimeter to determine the apparent color depth, or K / S value, of each fabric. The measuring aperture was 6.6mm, and SCID was used. 65 / 100°.

[0040] Color fastness to washing was determined according to GB / T 3921—2008 "Textiles - Tests for Color Fastness - Color Fastness to Washing" standard. The evaluation of color fastness to washing was conducted using an SF-600 computer colorimeter, according to AATCC (D... 65 The color fastness grade is assessed according to the requirements of the light source standard.

[0041] Tensile strength was tested using a Q800 Dynamic Mechanical Analyzer (DMA, TA Instruments, USA) to perform stress-strain tests on the fabric and determine its strength. Samples were cut into strips measuring 30 × 10 mm and placed in a tensile fixture, with one end fixed and the other end movable with the fixture. The temperature was maintained at 20°C, the frequency was set to 1 Hz, and the applied stress was gradually increased from 0 at a rate of 5 MPa / s. The strain change of the sample was recorded until the sample fractured. The stress at the fracture point was taken as the tensile strength of the sample.

[0042] The results are shown in Table 2.

[0043] Table 2. Performance Test Results Statistics

[0044]

[0045] As shown in Table 2, compared to control fabric 1 which did not contain modified polythiol in its dyeing system, fabric AC used a dyeing system with different amounts of modified polythiol. The results showed that fabric AC achieved better dyeing effect and color fastness, with the effect increasing with the amount added. Furthermore, compared to the same amount of traditionally used DTT, modified polythiol significantly improved the dyeing effect on the fabric.

[0046] In addition, traditional high-temperature dyeing will reduce the strength of wool fibers. The tensile strength of control fabric 2, which adopts the traditional high-temperature dyeing process, is lower than that of control fabric 1. Furthermore, compared with fabric AD, it can be seen that the use of DTT in the dyeing system does not promote the improvement of the tensile strength of the fabric, while the use of modified polythiol has a positive effect on improving the tensile strength of the fabric, thus ensuring the mechanical properties of the fabric.

[0047] 2.3 Investigation into the effects of dyeing and finishing treatments on the properties of fabric

[0048] During step 2.2, the fabric is treated as follows:

[0049] Process 1: During the low-temperature dyeing process of fabric B, fabric B is subjected to high-temperature setting at 100℃. The high-temperature setting process involves placing the fabric in a heat setting machine for 60 seconds. The timing of the high-temperature setting process is 30 minutes after the low-temperature dyeing of fabric B begins.

[0050] Process 2: During the low-temperature dyeing process of fabric B, fabric B is subjected to high-temperature setting at 120℃. The high-temperature setting process involves placing the fabric in a heat setting machine for 60 seconds. The timing of the high-temperature setting process is 30 minutes after the low-temperature dyeing of fabric B begins.

[0051] Process 3: After the low-temperature dyeing of fabric B is completed, fabric B is subjected to high-temperature setting at 100℃. The high-temperature setting process involves placing the fabric in a heat setting machine for 60 seconds.

[0052] Treatment 4: During the low-temperature dyeing process of fabric D, perform the same high-temperature setting and finishing as in Treatment 1.

[0053] Treatment 5: During the low-temperature dyeing process of control fabric 1, the same high-temperature setting and finishing process as in Treatment 1 was carried out.

[0054] After processing 1 to 5, each side of the fabric is subjected to soaping, washing, and drying to obtain the fabric, denoted as fabric ae.

[0055] Furthermore, a bio-based TPU film is further laminated onto the outer side of fabric a using an adhesive to prepare fabric f. Fabric a that has not undergone high-temperature setting is denoted as fabric g.

[0056] The felting shrinkage of fabric af was tested according to GB8629.2001 and ISWTM NO.31 test standards. A fully automatic shrinkage testing machine was used to test the machine-wash felting shrinkage of the fabric samples. The base fabric AD and control group were cut into 500mm × 500mm pieces, and three sets of marks were made on both the warp and weft directions of the samples. Before testing, the distance between the marks was measured to calculate the marked area, which was taken as the original fabric size S0. The fabric samples were then washed according to the standard procedure (7A + 3 × 5A) at a washing temperature of 40℃. After the test, the fabric samples were equilibrated under standard atmospheric conditions (temperature 20±1℃, relative humidity 65±5%) for 48 hours, and the distance between the marks was measured again to calculate the area S of the washed fabric. l The felting shrinkage rate of the fabric is calculated using the following formula: Felt shrinkage rate S% = (S0 - S1) / S o ×100%.

[0057] The results are shown in Table 3.

[0058] Table 3. Results of felting shrinkage test

[0059]

[0060] As can be seen from Table 3, fabric ab has a lower felting shrinkage rate than control fabric 1 after testing. This shows that high-temperature setting treatment has a positive effect on the fabric's resistance to machine washing deformation and shrinkage.

[0061] Meanwhile, comparing fabrics a and b, fabric c shows that the timing of the high-temperature setting treatment affects the fabric's resistance to machine wash deformation and shrinkage. Performing high-temperature setting treatment during low-temperature dyeing helps improve the fabric's resistance to machine wash deformation and shrinkage. Furthermore, comparing fabrics de and ab shows that the modified polythiol added to the dyeing system during low-temperature dyeing also has a positive effect on improving the fabric's resistance to machine wash deformation and shrinkage.

[0062] Furthermore, by further bonding a bio-based TPU film to the outside of fabric a with an adhesive, fabric f also has a low felting shrinkage rate. It can be seen that applying a film to the fabric can further reduce the felting shrinkage rate after washing, and the fabric's resistance to machine washing deformation and shrinkage is further improved.

[0063] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A machine-washable wool outdoor fabric, characterized in that: The machine-washable wool outdoor fabric comprises a fabric woven from wool-wrapped recycled nylon yarn as warp and weft threads; wherein the fabric undergoes the following dyeing and finishing treatment: low-temperature dyeing at 60-80℃ combined with high-temperature setting at 120-150℃ during the low-temperature dyeing process, wherein the low-temperature dyeing is carried out in a dyeing system containing modified polythiol; and the high-temperature setting is performed 30-50 minutes after the fabric begins low-temperature dyeing.

2. The machine-washable wool outdoor fabric according to claim 1, characterized in that: The fiber composition of the fabric, by weight percentage, includes 65-75% wool and 25-35% recycled nylon.

3. The machine-washable wool outdoor fabric according to claim 1, characterized in that: The modified polythiol is incorporated into the dyeing system at an amount of 0.6-1.2% of the fabric mass.

4. The machine-washable wool outdoor fabric according to claim 1, characterized in that: The fabric structure also includes a bio-based TPU film laminated to the outside of the fabric.

5. A method for preparing a machine-washable wool outdoor fabric as described in any one of claims 1-4, characterized in that: Specifically, the following steps are included: (1) First, wool yarn is wrapped around recycled nylon yarn as the core to obtain wool-wrapped recycled nylon yarn, and then wool-wrapped recycled nylon yarn is used as warp and weft yarns to weave the face fabric. (2) The fabric prepared in step (1) is placed in a dyeing system containing modified polythiol and dyed at low temperature at 60-80℃. At the same time, the fabric is subjected to high temperature setting at 100-120℃ during the low temperature dyeing process. (3) The machine-washable wool outdoor fabric can be obtained by washing the dyed and finished fabric with soap, water and drying.

6. The method for preparing a machine-washable wool outdoor fabric according to claim 5, characterized in that, In step (1), the warp yarns are woven at a density of 50-75 threads / inch, the weft yarns are woven at a density of 45-65 threads / inch, and the fabric is plain weave.

7. The method for preparing a machine-washable wool outdoor fabric according to claim 5, characterized in that: In step (2), the specific process of the low-temperature dyeing treatment is as follows: the surface is placed in the dyeing system according to a liquor ratio of 1kg:40-50L, the pH of the dyeing system is adjusted to 4.5-5.5, the dyeing temperature is 30-40℃, and the temperature is increased to 60-80℃ at a heating rate of 1-3℃ / min before dyeing. The dyeing time is 60-100min.

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