Machine washable wool silk outdoor fabric and preparation method thereof

Abstract

This invention relates to a machine-washable wool and silk outdoor fabric and its preparation method, belonging to the field of fabric preparation technology. The wool and silk outdoor fabric is obtained by weaving wool fibers blended with bio-based nylon 510 fibers as warp yarns and silk fibers blended with bio-based nylon 510 fibers as weft yarns. Both the wool and silk fibers undergo the following functional finishing process: first, the wool and silk fibers are heat-shrinked, and then the heat-shrinked wool and silk fibers are impregnated with a functional finishing solution. The functional finishing solution, by mass percentage, includes 80-90% fluoropolymer emulsion, 5-10% nano-grade ceramic powder, 1-5% crosslinking agent, and 1-5% anionic surfactant. The fabric provided by this invention has excellent outdoor performance and solves the problem of traditional wool or silk fabrics being unsuitable for machine washing 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 and silk outdoor fabric and its preparation method. Background Technology

[0002] Currently, with the increasing demand for lightweight, comfortable, and multifunctional clothing, new wool textile products are gradually developing towards lightweight, easy-care casual sportswear to adapt to changing market demands. Wool fiber is a pure natural renewable fiber, and due to its excellent warmth retention, elasticity, and moisture absorption, it is often used in medium-weight winter clothing fabrics. Silk fiber, also known as silkworm silk fiber, is mainly composed of animal protein and has a cooling effect. It also has good breathability and moisture absorption, and is often used in summer clothing fabrics.

[0003] Wool and silk fibers have lower strength than other fibers. Blending wool and silk fibers with other high-strength fibers to create blended yarns, and then using these blended yarns to weave fabrics, can fully utilize the moisture absorption, breathability, and antibacterial properties of wool and silk fibers while also enhancing their mechanical properties. This makes them well-suited for outdoor clothing. However, both wool and silk fibers are difficult to care for and cannot be machine washed. Fabrics made from wool and silk fibers tend to shrink and deform when wet, significantly affecting their performance. Summary of the Invention

[0004] The purpose of this invention is to provide a machine-washable wool and silk outdoor fabric and its preparation method in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] As a first aspect of the present invention, the present invention provides a machine-washable wool and silk outdoor fabric, wherein the wool and silk outdoor fabric is obtained by weaving wool fiber blended with bio-based nylon 510 fiber as warp yarn and silk fiber blended with bio-based nylon 510 fiber as weft yarn.

[0007] The wool fibers and silk fibers undergo the following functional finishing process: first, the wool fibers and silk fibers are heat-shrinked, and then the heat-shrinked wool fibers and silk fibers are impregnated with a functional finishing liquid.

[0008] The functional finishing liquid comprises, by weight percentage, 80-90% fluoropolymer emulsion, 5-10% nano-sized ceramic powder, 1-5% crosslinking agent, and 1-5% anionic surfactant.

[0009] As a further optimization of the present invention, the bio-based nylon 510 fiber is a masterbatch yarn, which is made by melt spinning from the following raw materials in the following mass percentages: 2-5% masterbatch, 1-5% nano titanium dioxide, 1-5% anionic surfactant, and the balance being nylon 510 resin chips.

[0010] As a further optimization of the present invention, the fluoropolymer emulsion is obtained by free radical dispersion polymerization and comprises 80 mol% tetrafluoroethylene, 15 mol% hexafluoropropylene and 5 mol% vinylidene fluoride by molar percentage.

[0011] As a further optimization of the present invention, the nanoscale ceramic powder includes nanoscale zinc oxide or nanoscale lanthanum oxide.

[0012] As a further optimization of the present invention, the fiber composition of the wool and silk outdoor fabric, by weight percentage, includes 35-45% wool fiber, 30-40% silk fiber, and 15-35% bio-based nylon 510 fiber.

[0013] As a second aspect of the present invention, the present invention also provides a method for preparing a machine-washable wool and silk outdoor fabric as described in any of the above descriptions, specifically comprising the following steps:

[0014] (1) Weigh out the formula amount of fluoropolymer emulsion, nano-sized ceramic powder, crosslinking agent and anionic surfactant, mix well, adjust the pH value to 4-6, and obtain the functional finishing solution for later use.

[0015] (2) First, place wool fibers and silk fibers in water at 90-100℃ and boil for 30-40 minutes to complete the heat shrinking treatment. Then, add functional finishing liquid to water to control its mass concentration to 4%. Then, immerse the wool fibers and silk fibers that have undergone heat shrinking treatment in water containing functional finishing liquid for 10-20 minutes. The bath ratio is 1:30-40. After immersion, squeeze the fibers to control the compression rate to 40-60%. Finally, pre-dry the fibers at 100℃ for 2 minutes and bake them at 150℃ for 2 minutes to complete the functional finishing.

[0016] (3) The wool fibers obtained in step (2) are blended with bio-based nylon fibers to obtain warp yarns, and the silk fibers obtained in step (2) are blended with bio-based nylon fibers to obtain weft yarns. The warp yarns and weft yarns are then woven to obtain the machine-washable wool and silk outdoor fabric.

[0017] As a further optimization of the present invention, in step (3), the warp yarn weaving density is 60-80 yarns / inch, the weft yarn weaving density is 50-70 yarns / inch, and the weaving structure of the warp and weft yarns is a small grid with a size of 0.2-0.6cm × 0.2-0.6cm.

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

[0019] (1) The wool and silk outdoor fabric of the present invention is obtained by weaving wool fiber blended with bio-based nylon 510 fiber as warp yarn and silk fiber blended with bio-based nylon 510 fiber as weft yarn. By blending the high-strength bio-based nylon 510 fiber with wool fiber and silk fiber to make blended yarn, and then using the blended yarn to weave the fabric, the breathability, moisture absorption and wearing comfort of wool fiber and silk fiber materials can be fully utilized, while giving the fabric better outdoor performance.

[0020] (2) This invention first heat-shrinks wool fibers and silk fibers, then uses a functional finishing liquid to impregnate the heat-shrinked wool fibers and silk fibers, and designs and improves the composition of the functional finishing liquid to improve the fabric’s resistance to machine washing deformation and shrinkage, thus solving the problem of wool fabrics being not machine washable and difficult to care for to a certain extent. Detailed Implementation

[0021] 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.

[0022] I. Materials and Methods

[0023] 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.

[0024] Both wool and silk fibers are obtained through commercial means. The preparation of wool and silk fibers (silk fibers) generally involves pretreatment, coarse spinning (stretching and doubling), fine spinning (twisting), and dyeing, which will not be elaborated here.

[0025] Bio-based nylon fiber is a masterbatch yarn. Its preparation method is as follows: First, nano-titanium dioxide, crosslinking agent CX-100, and anionic surfactant (sodium dodecylbenzenesulfonate) are blended with nylon 510 resin chips (1 / 5 of the total amount) according to the formula. After mixing in a high-speed mixer, the mixture is sent to a twin-screw granulator for melt granulation at a melt temperature of 280℃. The masterbatch obtained after granulation is mixed with the remaining nylon 510 resin chips and vacuum dried (vacuum degree less than 0.2 mmHg, drying temperature 120℃, time 4 h). Then, it is blended with the formulated amount of masterbatch. The blend is sent to a melt spinning machine for spinning, and after post-treatment such as drawing and cooling, bio-based nylon 510 masterbatch yarn is obtained. The linear density of the bio-based nylon 510 masterbatch yarn is determined based on the blending ratio with wool or silk fibers and the linear density of the blended yarn.

[0026] The fluoropolymer emulsion is obtained by free radical dispersion polymerization and consists of 80 mol% tetrafluoroethylene, 15 mol% hexafluoropropylene and 5 mol% vinylidene fluoride by molar percentage. The solid content of the fluoropolymer emulsion is 25 wt%. II. Specific Implementation Methods

[0028] Example 1

[0029] The machine-washable wool and silk outdoor fabric provided in this embodiment comprises, by weight percentage, 45% wool fiber, 30% silk fiber and 25% bio-based nylon 510 fiber.

[0030] Its preparation method specifically includes the following steps:

[0031] (1) Mix 80% fluoropolymer emulsion, 10% nano-sized lanthanum oxide, 5% crosslinking agent CX-100 and 5% anionic surfactant (sodium dodecylbenzene sulfonate) according to mass percentage, adjust the pH value to 4-6, and obtain functional finishing solution for later use.

[0032] (2) First, place wool fibers and silk fibers in water at 100℃ for 30 minutes to complete the heat shrinking treatment. Then, add functional finishing liquid to water to control the mass concentration to 4%. Then, immerse the heat-shrinked wool fibers and silk fibers in water containing functional finishing liquid for 10 minutes with a bath ratio of 1:30. After immersion, squeeze the fibers to control the compression rate to 40%. Finally, pre-dry the fibers at 100℃ for 2 minutes and bake them at 150℃ for 2 minutes to complete the functional finishing.

[0033] (3) Bio-based nylon 510 fiber is made by melt spinning of the following raw materials in the following mass percentages: 5% masterbatch, 5% nano titanium dioxide, 1% anionic surfactant, and the balance being nylon 510 resin chips. The wool fiber obtained in step (2) is blended with bio-based nylon 510 fiber to obtain warp yarn, and the silk fiber obtained in step (2) is blended with bio-based nylon 510 fiber to obtain weft yarn. The specific blending ratio of warp and weft yarn is determined according to the composition of each fiber component in the fabric and the weaving density of warp and weft yarn. Then, the warp and weft yarn are woven. The weaving density of the warp yarn is 80 threads / inch, and the weaving density of the weft yarn is 50 threads / inch. The weaving structure of the warp and weft yarn is a small grid with a size of 0.2cm×0.2cm, which can obtain a machine-washable wool and silk outdoor fabric.

[0034] Example 2

[0035] The machine-washable wool and silk outdoor fabric provided in this embodiment comprises, by weight percentage, 35% wool fiber, 40% silk fiber and 25% bio-based nylon 510 fiber.

[0036] Its preparation method specifically includes the following steps:

[0037] (1) Mix 90% fluoropolymer emulsion, 5% nano-sized lanthanum oxide, 2% crosslinking agent CX-100 and 3% anionic surfactant (sodium dodecylbenzene sulfonate) by mass percentage, adjust the pH value to 4-6, and obtain functional finishing solution for later use.

[0038] (2) First, place wool fibers and silk fibers in water at 90℃ for 40 minutes to complete the heat shrinking treatment. Then, add functional finishing liquid to water to control the mass concentration to 4%. Then, immerse the heat-shrinked wool fibers and silk fibers in water containing functional finishing liquid for 20 minutes with a bath ratio of 1:40. After immersion, squeeze the fibers to control the compression rate to 60%. Finally, pre-dry the fibers at 100℃ for 2 minutes and bake them at 150℃ for 2 minutes to complete the functional finishing.

[0039] (3) Bio-based nylon 510 fiber is made by melt spinning of the following raw materials in the following mass percentages: 2% masterbatch, 1% nano titanium dioxide, 5% anionic surfactant, and the balance being nylon 510 resin chips. The wool fiber obtained in step (2) is blended with the bio-based nylon 510 fiber to obtain warp yarn, and the silk fiber obtained in step (2) is blended with the bio-based nylon 510 fiber to obtain weft yarn. The specific blending ratio of warp and weft yarn is determined according to the composition of each fiber component in the fabric and the weaving density of warp and weft yarn. Then, the warp and weft yarns are woven with a weaving density of 60 ends / inch for the warp yarn and 70 ends / inch for the weaving density. The weaving structure of the warp and weft yarns is a small grid with a size of 0.6cm × 0.6cm, which yields a machine-washable wool and silk outdoor fabric.

[0040] Example 3

[0041] The machine-washable wool and silk outdoor fabric provided in this embodiment comprises, by weight percentage, 40% wool fiber, 35% silk fiber and 25% bio-based nylon 510 fiber.

[0042] Its preparation method specifically includes the following steps:

[0043] (1) Mix 85% fluoropolymer emulsion, 8% nano-alumina, 5% crosslinking agent CX-100 and 2% anionic surfactant (sodium dodecylbenzene sulfonate) according to mass percentage, adjust the pH value to 4-6, and obtain functional finishing solution for later use.

[0044] (4) First, place wool fibers and silk fibers in water at 100℃ for 30 minutes to complete the heat shrinking treatment. Then, add functional finishing liquid to water to control the mass concentration to 4%. Then, immerse the heat-shrinked wool fibers and silk fibers in water containing functional finishing liquid for 20 minutes with a bath ratio of 1:40. After immersion, squeeze the fibers to control the compression rate to 50%. Finally, pre-dry the fibers at 100℃ for 2 minutes and bake them at 150℃ for 2 minutes to complete the functional finishing.

[0045] (5) Bio-based nylon 510 fiber is made by melt spinning of the following raw materials in the following mass percentages: 4% masterbatch, 3% nano titanium dioxide, 3% anionic surfactant, and the balance being nylon 510 resin chips. The wool fiber obtained in step (2) is blended with the bio-based nylon 510 fiber to obtain warp yarn, and the silk fiber obtained in step (2) is blended with the bio-based nylon 510 fiber to obtain weft yarn. The specific blending ratio of warp and weft yarn is determined according to the composition of each fiber component in the fabric and the weaving density of warp and weft yarn. Then, the warp and weft yarns are woven with a weaving density of 70 ends / inch for the warp yarn and 60 ends / inch for the weaving density. The weaving structure of the warp and weft yarns is a small grid with a size of 0.6cm × 0.6cm, which yields a machine-washable wool and silk outdoor fabric.

[0046] III. Verification Experiment

[0047] 1. To investigate whether the fabrics prepared in Examples 1-3 have good outdoor performance, referring to GB / T5453-1997, GB / T19976-2005, GB / T21655.2—2009 and the special requirements for outdoor sports fabrics, the evaluation criteria for three key properties of each layer of outdoor sports fabrics were determined, namely, air permeability, bursting strength, and moisture wicking and quick-drying capacity, as shown in Table 1. Air permeability, bursting strength, and moisture wicking and quick-drying capacity are represented by air permeability, bursting strength, and liquid moisture management capacity (OMMC), respectively.

[0048] Table 1. Performance Evaluation Criteria for Outdoor Fabrics

[0049]

[0050] The fabrics prepared in Examples 1-3 were tested for air permeability using a YG461E-III fully automatic air permeability meter, referring to GB / T5453—1997 "Determination of Air Permeability of Textiles". The bursting strength of the fabrics was tested using an HD026N electronic fabric bursting strength tester, referring to GB / T19976—2005 "Determination of Bursting Strength of Textiles - Steel Ball Method". The overall liquid moisture absorption and diffusion capacity of the fabrics was tested using a liquid moisture management tester, referring to GB / T21655.2—2009 "Evaluation of Moisture Absorption and Quick-Drying Properties of Textiles - Part 2: Dynamic Moisture Transfer Method". Additionally, 100% wool and 100% silk fabrics were used as control groups and subjected to the same testing treatments as described above.

[0051] The results are shown in Table 2.

[0052] Table 2. Performance Test Results Statistics

[0053]

[0054] As shown in Table 2, compared to 100% wool and 100% silk fabrics, the fabrics prepared in Examples 1-3 all meet the standards for breathability, moisture absorption and quick-drying, and bursting strength of each layer of outdoor sports fabrics, exhibiting good outdoor performance. The fabrics in Examples 1-3 are blends of wool fiber, silk fiber, and bio-based nylon 510 fiber, respectively. The excellent strength properties of the bio-based nylon 510 fiber blend enhance the bursting strength of the fabric, improving its outdoor performance. Simultaneously, it also leverages the breathability, moisture permeability, and cool-feeling comfort inherent in wool and silk fabrics.

[0055] 2. To investigate the impact of functional finishing on wool and silk fibers on fabric performance, the following comparative examples were set up:

[0056] Comparative Example 1: The difference from Example 1 is in step (2): wool fibers and silk fibers are placed in water at 100°C and steamed for 30 minutes to complete the heat shrinking treatment.

[0057] Comparative Example 2: The difference from Example 1 is in step (2): the functional finishing liquid is added to water to control its mass concentration to 4%, and the wool fibers and silk fibers that have not been heat-shrinked are directly immersed in water containing the functional finishing liquid for 10 minutes, with a bath ratio of 1:30. After immersion, the fibers are squeezed to control the compression rate to 40%. Finally, the fibers are pre-dried at 100°C for 2 minutes and baked at 150°C for 2 minutes to complete the functional finishing.

[0058] Comparative Example 3: The difference from Example 1 is that the wool fibers and silk fibers are not treated in step (2).

[0059] Comparative Example 4: The difference from Example 1 is in step (1): 90% of fluoropolymer emulsion, 5% of crosslinking agent CX-100 and 5% of anionic surfactant (sodium dodecylbenzene sulfonate) are mixed according to mass percentage, and the pH value is adjusted to 4-6 to obtain functional finishing solution for later use.

[0060] Comparative Example 5: The difference from Example 1 is in step (1): a commercially available nonionic polyethylene emulsion (brand: American Michaelman) is used instead of the functional finishing liquid of Example 1.

[0061] The following performance tests were conducted on the fabrics prepared in Example 1 and Comparative Examples 1-5.

[0062] (1) Felt shrinkage test: Referring to GB8629.2001 and ISWTM NO.31 test standards, the machine washing felt shrinkage rate of the fabric was tested using a fully automatic shrinkage rate tester. The fabric was cut into 500mm×500mm specifications, and three sets of marks were made on the warp and weft directions of the sample. Before the test, the distance between the marks was measured and the marked area was calculated as the original size S0 of the fabric. Then the fabric sample was washed according to the standard procedure (7A+3×5A) with the washing temperature set at 40℃. After the test, the fabric sample was equilibrated under standard atmospheric conditions (temperature 20±1℃, relative humidity 65±5%) for 48h, and the distance between the marks was measured again to calculate the area S of the fabric after washing. l The felting shrinkage rate of the fabric is calculated using the following formula: Felt shrinkage rate S% = (S0 - S1) / S o ×100%.

[0063] (2) Tear resistance test: The test shall be conducted in accordance with GB / T3917-1:2009 "Tear properties of fabrics - Part 1: Determination of tear strength by impact pendulum method".

[0064] The results are shown in Table 3.

[0065] Table 3. Results of felting shrinkage test

[0066]

[0067]

[0068] As can be seen from Table 3, the felting shrinkage rate of the fabric in Example 1 was lower after testing, while the tear strength of the fabric was higher. Comparing Example 1 and Example 3, it can be seen that heat shrinking treatment or functional finishing solution treatment on wool fibers and silk fibers alone is not conducive to reducing the felting shrinkage rate of the fabric after machine washing.

[0069] Compared with Example 1, Comparative Example 4 shows that the composition of the functional finishing liquid has an impact on improving the tear strength of the fabric, and the incorporation of nano-sized ceramic powders such as nano-sized lanthanum oxide helps to improve the tear resistance of the final fabric.

[0070] Furthermore, a comparison between Comparative Example 5 and Example 1 shows that commercially available nonionic polyethylene emulsions commonly used for fabric shrinkage prevention can reduce the shrinkage rate of fabrics after machine washing, but cannot improve the tear resistance of the fabrics.

[0071] 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 and silk outdoor fabric, characterized in that: The wool silk outdoor fabric is obtained by weaving with wool fiber blended bio-based nylon 510 fiber as warp yarn and silk fiber blended bio-based nylon 510 fiber as weft yarn, wherein, The bio-based nylon 510 fiber is color master batch yarn made from the following raw materials by melt spinning: color master batch 2-5%, nano titanium dioxide 1-5%, anionic surfactant 1-5%, and the balance of nylon 510 resin chips; The wool fiber and silk fiber are both subjected to the following functional finishing: first, heat shrinkage treatment is performed on the wool fiber and silk fiber, and then the heat-shrunk wool fiber and silk fiber are immersed in a functional finishing liquid for padding; The functional finishing liquid comprises, in terms of mass percentage, 80-90% of fluoropolymer emulsion, 5-10% of nano ceramic powder, 1-5% of crosslinking agent, and 1-5% of anionic surfactant; the fluoropolymer emulsion is obtained by free radical dispersion polymerization and comprises, in terms of mole percentage, 80 mol% of tetrafluoroethylene, 15 mol% of hexafluoropropylene, and 5 mol% of vinylidene fluoride.

2. The machine washable wool-silk outdoor fabric as claimed in claim 1, wherein: The nano ceramic powder comprises nano zinc oxide or nano lanthanum oxide.

3. The machine washable wool-silk outdoor fabric as claimed in claim 1, wherein: The fiber composition of the wool silk outdoor fabric comprises, in terms of mass percentage, 35-45% of wool fiber, 30-40% of silk fiber, and 15-35% of bio-based nylon 510 fiber.

4. A process for the production of a machine washable wool-silk outdoor fabric as claimed in any one of claims 1 to 3, characterised in that: Specifically comprising the following steps: (1) weigh the formula amount of fluoropolymer emulsion, nano ceramic powder, crosslinking agent, and anionic surfactant, mix them uniformly, adjust the pH value to 4-6, and obtain a functional finishing liquid for standby use; (2) first, the wool fiber and silk fiber are respectively placed in 90-100℃ water for 30-40min of steaming to complete heat shrinkage treatment, then the functional finishing liquid is added to the water to control the mass concentration to 4%, and the heat-shrunk wool fiber and silk fiber are respectively immersed in the water containing the functional finishing liquid for 10-20min of impregnation, with a bath ratio of 1:30-40, after impregnation, the fiber is squeezed to control the pressure rolling rate to 40-60%, finally, the fiber is pre-dried at 100℃ for 2min and baked at 150℃ for 2min to complete the functional finishing; (3) the wool fiber obtained by step (2) is blended with bio-based nylon 510 fiber to obtain warp yarn, the silk fiber obtained by step (2) is blended with bio-based nylon 510 fiber to obtain weft yarn, then the warp yarn and weft yarn are woven to obtain the machine-washable wool silk outdoor fabric.

5. A process for preparing a machine washable wool-silk outdoor fabric according to claim 4, characterized in that: In step (3), the weaving density of the warp yarn is 60-80 roots / inch, the weaving density of the weft yarn is 50-70 roots / inch, and the weaving organization of the warp yarn and weft yarn is a small grid with a size of 0.2-0.6cm x 0.2-0.6cm.

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