An ultralight bio-based nylon coated fabric and its preparation method

Abstract

This invention belongs to the field of fabric technology, specifically disclosing an ultralight bio-based nylon coated fabric and its preparation method. The ultralight bio-based nylon coated fabric is made by first weaving bio-based nylon yarn as warp and weft to obtain the fabric body, and then coating it with a coating. The coating is an acrylamide / N-vinylpyrrolidone copolymer amphiphilic hydrogel encapsulating plant polypeptides. Through the design of the coating composition and the optimization of the preparation method, this invention results in a fabric that is lightweight yet possesses excellent breathability, moisture permeability, down resistance, and water resistance, while also exhibiting good tensile strength and high wearing comfort.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology, and in particular relates to an ultralight bio-based nylon coated fabric and its preparation method. Background Technology

[0002] Under the general trend of low-carbon, environmental protection and sustainable development, focusing on the development of bio-based fibers and expanding their application has become an important manifestation of the textile industry's move towards greening. At present, bio-based nylon materials, due to their characteristics such as renewable raw materials, reduced carbon emissions and energy saving, have gradually become the focus of research and development in the textile industry due to their lower cost and performance advantages.

[0003] Currently, coating the fabric surface is an effective way to enhance fabric performance. For example, coating the fabric surface with waterproof coatings or flame-retardant coatings can make the fabric waterproof and flame-retardant. However, coating the fabric will affect its breathability and moisture permeability as well as wearing comfort. Therefore, how to improve the performance of coated fabrics while ensuring comfortable wearing performance is a technical problem that textile companies are currently trying to solve. Summary of the Invention

[0004] To address the aforementioned problems, the primary objective of this invention is to provide an ultralight bio-based nylon coated fabric and its preparation method.

[0005] The specific technical solution of the present invention includes:

[0006] This invention provides an ultralight bio-based nylon coated fabric, which is made by first weaving bio-based nylon yarn as warp and weft to obtain the fabric body, and then coating the fabric body with a coating. The coating is an acrylamide / N-vinylpyrrolidone copolymer amphiphilic hydrogel containing plant polypeptides.

[0007] As a further optimization of the present invention, the method for preparing the coating is as follows:

[0008] (1) Mix plant polypeptides with water at a volume ratio of 3-5:50-60, disperse by ultrasonication, add N-vinylpyrrolidone and acrylamide monomer and stir until uniform to obtain a mixed solution;

[0009] (2) Add ammonium persulfate of 1 / 20 of the mass of the mixed solution to the mixed solution, stir and then introduce nitrogen gas, while raising the temperature to 40-45℃ and keeping it at the temperature for 2-3 hours. Then add sodium alginate of the same mass as the plant polypeptide, stir at 350-400 r / min for 1-2 hours, and spray dry to obtain the coating.

[0010] As a further optimization of the present invention, the mass ratio of the plant polypeptide to N-vinylpyrrolidone and acrylamide monomer is 0.5-1:2:3.

[0011] As a further optimization of the present invention, the plant polypeptide includes one of tea polypeptide, ginkgo leaf polypeptide and ginseng polypeptide.

[0012] As a further optimization of the present invention, the fineness of the bio-based nylon yarn is 15-20D.

[0013] The present invention also provides a method for preparing ultralight bio-based nylon coated fabric as described above, comprising the following steps:

[0014] (1) The fabric body is made by weaving bio-based nylon yarn as warp and weft.

[0015] (2) Add the coating to water to prepare a coating solution. After ultrasonically dispersing and pre-cooling the coating solution at -10℃ to -20℃ for 30-45 minutes, it is ready for use.

[0016] (3) After ironing the fabric body, stretch it in the weft direction first, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body to form a weft coating by high-speed spraying. Then, stretch the fabric in the radial direction, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body to form a radial coating by high-speed spraying. Repeat the operation 2-3 times.

[0017] (4) The fabric body obtained by step (3) is cured at a temperature of 50-80℃ for 2-3 hours to obtain the ultralight bio-based nylon coated fabric.

[0018] As a further optimization of the present invention, in step (1), the textile process parameters are as follows: the ring spindle speed is 6000 rpm / m, the twist is set to 700 T / m, the twist direction is set to Z twist, the stage lift speed is 1.00 mm / s, the stage lift distance is 55 mm, and the draft ratio is 25-30 times.

[0019] As a further optimization of the present invention, in step (3), the spraying speed of the coating solution is 10-15 mL / h.

[0020] In summary, the beneficial effects of the present invention are as follows:

[0021] The ultralight bio-based nylon coated fabric provided by this invention is made by first weaving bio-based nylon yarn as warp and weft to obtain the fabric body, and then coating it with a coating. The coating is an acrylamide / N-vinylpyrrolidone copolymer amphiphilic hydrogel encapsulating plant polypeptides. Through the optimization of the coating composition and preparation method, the fabric obtained by this invention has a lightweight structure, yet possesses excellent breathability, moisture permeability, down resistance, and water resistance, as well as good tensile strength and high wearing comfort. 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] Example 1

[0024] This embodiment provides an ultralight bio-based nylon coated fabric. The ultralight bio-based nylon coated fabric is made by first weaving bio-based nylon yarn as warp and weft to obtain the fabric body, and then coating the fabric body with a coating. The coating is an acrylamide / N-vinylpyrrolidone copolymer amphiphilic hydrogel containing plant polypeptides.

[0025] The coating is prepared by mixing ginkgo leaf peptides and water at a volume ratio of 3:60, dispersing by ultrasound, adding N-vinylpyrrolidone and acrylamide monomer, and stirring until homogeneous to obtain a mixed solution. The mass ratio of the plant peptides to N-vinylpyrrolidone and acrylamide monomer is 0.5:2:3. Ammonium persulfate (1 / 20 of the mass of the mixed solution) is added to the mixed solution, stirred, and nitrogen gas is introduced while the temperature is raised to 40°C and maintained for 3 hours. Then, sodium alginate (equal in mass to the plant peptides) is added, and the mixture is stirred at 350 r / min for 2 hours. The coating is then spray-dried to obtain the coating.

[0026] Preparation method of ultralight bio-based nylon coated fabric

[0027] (1) The fabric body is made by weaving 15D bio-based nylon yarn as warp and 20D bio-based nylon yarn as weft. The weaving parameters are: ring spindle speed of 6000rpm / m, twist of 700T / m, twist direction of Z twist, lift speed of 1.00mm / s, lift distance of 55mm, and draft ratio of 25.

[0028] (2) Add the coating to water at a dosage of 60 g / L to prepare a coating solution. After ultrasonically dispersing and pre-cooling the coating solution at -10℃ for 45 min, it is ready for use.

[0029] (3) After ironing the fabric body, stretch it in the weft direction first, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body at a spraying speed of 15 mL / h to form a weft coating. Then, stretch the fabric in the radial direction, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body at a spraying speed of 15 mL / h to form a radial coating. Repeat the operation twice.

[0030] (4) The fabric body obtained by step (3) is cured at 50°C for 3 hours to obtain the ultralight bio-based nylon coated fabric.

[0031] Example 2

[0032] This embodiment provides an ultralight bio-based nylon coated fabric. The ultralight bio-based nylon coated fabric is made by first weaving bio-based nylon yarn as warp and weft to obtain the fabric body, and then coating the fabric body with a coating. The coating is an acrylamide / N-vinylpyrrolidone copolymer amphiphilic hydrogel containing plant polypeptides.

[0033] The coating is prepared by mixing tea peptides and water at a volume ratio of 5:50, dispersing by ultrasonication, adding N-vinylpyrrolidone and acrylamide monomer, and stirring until homogeneous to obtain a mixed solution. The mass ratio of the plant peptides to N-vinylpyrrolidone and acrylamide monomer is 1:2:3. Ammonium persulfate (1 / 20 of the mass of the mixed solution) is added to the mixed solution, and after stirring, nitrogen gas is introduced while simultaneously heating to 45°C and maintaining this temperature for 2 hours. Then, sodium alginate (equal in mass to the plant peptides) is added, and the mixture is stirred at 400 r / min for 1 hour. The mixture is then spray-dried to obtain the coating.

[0034] Preparation method of ultralight bio-based nylon coated fabric

[0035] (1) The fabric body is made by weaving 20D bio-based nylon yarn as warp and 15D bio-based nylon yarn as weft. The weaving parameters are: ring spindle speed of 6000rpm / m, twist of 700T / m, twist direction of Z twist, lift speed of 1.00mm / s, lift distance of 55mm, and draft ratio of 30.

[0036] (2) Add the coating to water at a dosage of 60 g / L to prepare a coating solution. After ultrasonically dispersing and pre-cooling the coating solution at -20℃ for 30 min, it is ready for use.

[0037] (3) After ironing the fabric body, stretch it in the weft direction first, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body at a spraying speed of 10 mL / h to form a weft coating. Then, stretch the fabric in the radial direction, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body at a spraying speed of 10 mL / h to form a radial coating. Repeat the operation 3 times.

[0038] (4) The fabric body obtained by step (3) is cured at 80°C for 2 hours to obtain the ultralight bio-based nylon coated fabric.

[0039] Example 3

[0040] This embodiment provides an ultralight bio-based nylon coated fabric. The ultralight bio-based nylon coated fabric is made by first weaving bio-based nylon yarn as warp and weft to obtain the fabric body, and then coating the fabric body with a coating. The coating is an acrylamide / N-vinylpyrrolidone copolymer amphiphilic hydrogel containing plant polypeptides.

[0041] The coating is prepared by mixing ginkgo leaf peptides and water at a volume ratio of 4:55, dispersing by ultrasound, adding N-vinylpyrrolidone and acrylamide monomer, and stirring until homogeneous to obtain a mixed solution. The mass ratio of the plant peptides to N-vinylpyrrolidone and acrylamide monomer is 0.7:2:3. Ammonium persulfate (1 / 20 of the mass of the mixed solution) is added to the mixed solution, stirred, and nitrogen gas is introduced while simultaneously heating to 40°C and maintaining this temperature for 3 hours. Then, sodium alginate (equal in mass to the plant peptides) is added, and the mixture is stirred at 350 r / min for 2 hours. Finally, the coating is spray-dried.

[0042] Preparation method of ultralight bio-based nylon coated fabric

[0043] (5) The fabric body is made by weaving 20D bio-based nylon yarn as warp and 15D bio-based nylon yarn as weft. The weaving parameters are: ring spindle speed of 6000 rpm / m, twist of 700T / m, twist direction of Z twist, lift speed of 1.00 mm / s, lift distance of 55 mm, and draft ratio of 30.

[0044] (6) Add the coating to water at a dosage of 60 g / L to prepare a coating solution. After ultrasonically dispersing and pre-cooling the coating solution at -20℃ for 30 min, it is ready for use.

[0045] (7) After ironing the fabric body, stretch it in the weft direction first, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body at a spraying speed of 15 mL / h to form a weft coating. Then, stretch the fabric in the radial direction, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body at a spraying speed of 15 mL / h to form a radial coating. Repeat the operation 3 times.

[0046] (8) The fabric body obtained by step (3) is cured at 65°C for 2.5 hours to obtain the ultralight bio-based nylon coated fabric.

[0047] Comparative Example 1

[0048] This comparative example provides an ultralight bio-based nylon coated fabric. The preparation method is the same as in Example 3, except that the coating is not pre-cooled in step (2).

[0049] Comparative Example 2

[0050] This comparative example provides an ultralight bio-based nylon coated fabric. In its preparation method, except for step (3): after ironing the fabric body, only weft stretching is performed, and at the same time, the coating solution obtained in step (2) is applied to the surface of the fabric body by high-speed spraying to form a weft coating, and the operation is repeated 3 times, the other steps are the same as in Example 3.

[0051] Comparative Example 3

[0052] This comparative example provides an ultralight bio-based nylon coated fabric. In its preparation method, except for step (3): after ironing the fabric body, only radial stretching is performed, and at the same time, the coating solution obtained in step (2) is applied to the surface of the fabric body to form a radial coating by high-speed spraying, and the operation is repeated 3 times, the other steps are the same as in Example 3.

[0053] Comparative Example 4

[0054] This comparative example provides an ultralight bio-based nylon coated fabric. In its preparation method, except for step (2), the coating is not pre-cooled; in step (3), the fabric body is not stretched, and the coating solution obtained in step (2) is applied to the surface of the fabric body by scraping to form a coating. The operation is repeated 3 times, and the other steps are the same as in Example 3.

[0055] Comparative Example 5

[0056] This comparative example provides an ultralight bio-based nylon coated fabric. In its preparation method, except for step (3): after ironing the fabric body, weft stretching is performed first, and at the same time, the coating solution obtained in step (2) is applied to the surface of the fabric body by scraping to form a weft coating. Subsequently, the fabric is radially stretched, and at the same time, the coating solution obtained in step (2) is applied to the surface of the fabric body by scraping to form a radial coating. The operation is repeated 2-3 times.

[0057] Verification test

[0058] I. The fabric samples obtained in Examples 1-3 and Comparative Examples 1-5 were tested for breaking strength and elongation at break. Instrument: YG(B)0260-250 electronic fabric strength tester. The test was conducted according to the national standard "GB / T3923.1-1997 Fabrics - Tensile Properties - Part 1: Determination of Breaking Strength and Elongation at Break - Strip Method": Pre-tension: 2N; Upper and lower clamp distance: 20mm; Lower clamp descent speed: 102m / s. -1 Test method: According to the standard, when using the strip method, the effective width of the sample is 50 mm with a burr of about 5 mm. The sample is stretched at a constant elongation rate until it breaks. The test is performed 5 times in the warp and 5 times in the weft directions. The breaking strength and elongation at break are recorded and the average value is calculated.

[0059] The results are shown in Table 1.

[0060] Table 1. Statistical Table of Test Results

[0061]

[0062] As shown in Table 1, during the preparation of ultralight bio-based nylon coated fabric, the pre-cooling treatment of the coating has a certain positive impact on the mechanical properties of the fabric. In addition, the way the coating is applied to the main body of the fabric also affects the tensile strength of the fabric. Compared with the traditional scraping method, the method of applying the coating to the surface of the fabric body by high-speed spraying while the main body of the fabric is stretched has a positive effect on the tensile strength of the fabric.

[0063] II. The fabric samples obtained in Examples 1-3 and Comparative Examples 1-5 were tested for air permeability, moisture permeability, and down-proof properties. Air permeability testing: Following the national standard (GB / T5433), the samples were tested using a YG461G fully automatic fabric air permeability meter. Specific experimental parameters were set as follows: ambient temperature 25℃, relative humidity 60%, pressure difference 100Pa, and air permeability area 20cm². 2 The nozzle diameter is 0.8mm. Ten tests were conducted on different parts of the fabric sample, and the average value was taken as the final air permeability data.

[0064] Moisture permeability test: The moisture permeability of the samples was tested using an FX3180 moisture permeability meter according to national standard GB / T12704.1-2009(a). During the test, the temperature was 38℃, the humidity was 90.0%, the airflow velocity was 0.5 m / s, and the test area was 28.3 cm². 2 Before testing, the test chamber needs to be pre-conditioned for humidity. After automatic humidity conditioning, the instrument begins the moisture permeability test, automatically recording moisture permeability data every hour for a total of two times. After the experiment is completed, the moisture permeability data of the samples are manually recorded, and the average of the three sets of experimental data for each sample is used as the final data.

[0065] Down resistance test: In the experiment, according to the national standard GB / T12705.2-2009 "Textiles - Test method for down resistance of fabrics - Part 2: Rotating box method", when the number of down threads in the fabric is greater than 15, it has poor down resistance; when it is less than 15, it has down resistance; when it is less than 5, it has good down resistance.

[0066] Water resistance testing was conducted using an OCA40 video contact angle meter. The water volume was 6 μl, and the reading was taken 60 seconds after the water droplet contacted the fabric. Measurements were taken five times at different locations on the same sample, and the average value was recorded. A larger contact angle indicates better water resistance.

[0067] The results are shown in Table 2.

[0068] Table 1. Statistical Table of Test Results

[0069]

[0070] As can be seen from Table 2, the ultralight bio-based nylon coated fabrics prepared by the method of this application all have good down resistance, and the fabrics have good moisture permeability, breathability, and water resistance. From the comparison of the data of the examples and comparative examples, the method of applying a coating solution obtained after pre-cooling treatment to the surface of the fabric body by ironing the fabric body and then stretching it in the weft and radial directions can ensure that the fabric has good breathability, moisture permeability, and water resistance. According to the results in Table 1, the tensile strength of the fabric is thus improved.

[0071] 3. To investigate the influence of coating composition on fabric performance, the composition of the coating was adjusted according to the coating component design table given in Table 3, and the fabric was prepared according to the preparation method given in Example 3. The air permeability, moisture permeability, down resistance and water resistance were tested.

[0072] Table 3. Coating Composition Design Table

[0073]

[0074]

[0075] In addition, based on the composition of the coating disclosed in Group B, sodium alginate was replaced with starch of equal mass to ginkgo leaf peptides during coating preparation, and the fabric prepared according to the preparation method of Example 3 was used as a control group. The test results are shown in Table 4.

[0076] Table 4. Statistical Table of Test Results

[0077]

[0078] As shown in Table 4, the composition of the coating has a significant impact on the breathability and moisture permeability of the fabric. The data from group AF show that the addition of plant peptides has a positive effect on improving the breathability, moisture permeability, and water resistance of the fabric, and the skin-friendliness of the fabric is improved. In addition, the effect of ginkgo leaf peptides on enhancing the breathability, moisture permeability, and water resistance of the fabric is more obvious than that of tea peptides and ginseng peptides. Furthermore, in the preparation process of the coating, after replacing sodium alginate with starch, it was found that the breathability and moisture permeability of the fabric decreased significantly compared with group AF. It is speculated that there is a synergistic effect between plant peptides and sodium alginate on the breathability, moisture permeability, and water resistance of the fabric.

[0079] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are specific and detailed, 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 improvements without departing from the concept of the present invention, and these improvements all fall within the scope of protection of the present invention.

Claims

1. An ultralight bio-based nylon coated fabric, characterized in that, The ultralight bio-based nylon coated fabric is made by first weaving bio-based nylon yarn as warp and weft to obtain the fabric body, and then coating it with a coating. The coating is an acrylamide / N-vinylpyrrolidone copolymer amphiphilic hydrogel encapsulating plant polypeptides, and its preparation method is as follows: (1) Mix plant polypeptides with water at a volume ratio of 3-5:50-60, disperse by ultrasonication, add N-vinylpyrrolidone and acrylamide monomer and stir until homogeneous to obtain a mixed solution; (2) Add ammonium persulfate of 1 / 20 of the mass of the mixed solution to the mixed solution, stir and then introduce nitrogen gas, while raising the temperature to 40-45℃ and keeping it at the temperature for 2-3 hours. Then add sodium alginate of the same mass as the plant polypeptide, stir at 350-400 r / min for 1-2 hours, and spray dry to obtain the coating.

2. The ultralight bio-based nylon coated fabric according to claim 1, characterized in that, The mass ratio of the plant polypeptide to N-vinylpyrrolidone and acrylamide monomer is 0.5-1:2:

3.

3. The ultralight bio-based nylon coated fabric according to claim 1, characterized in that, The plant polypeptides include one of tea polypeptides, ginkgo leaf polypeptides, and ginseng polypeptides.

4. The ultralight bio-based nylon coated fabric according to claim 1, characterized in that, The fineness of the bio-based nylon yarn is 15-20D.

5. A method for preparing an ultralight bio-based nylon coated fabric as described in any one of claims 1-4, characterized in that, Includes the following steps: (1) The fabric body is made by weaving bio-based nylon yarn as warp and weft. (2) Add the coating to water to prepare a coating solution. After ultrasonically dispersing and pre-cooling the coating solution at -20℃ to -10℃ for 30-45 minutes, it is ready for use. (3) After ironing the fabric body, stretch it in the weft direction first, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body to form a weft coating by high-speed spraying. Then, stretch the fabric in the radial direction, and at the same time, apply the coating solution obtained in step (2) to the surface of the fabric body to form a radial coating by high-speed spraying. Repeat the operation 2-3 times. (4) The fabric body obtained by step (3) is cured at a temperature of 50-80℃ for 2-3 hours to obtain the ultralight bio-based nylon coated fabric.

6. The method for preparing an ultralight bio-based nylon coated fabric according to claim 5, characterized in that, In step (1), the textile process parameters are as follows: the ring spindle speed is 6000 rpm, the twist is set to 700 T / m, the twist direction is set to Z twist, the stage lift speed is 1.00 mm / s, the stage lift distance is 55 mm, and the draft ratio is 25-30 times.

7. The method for preparing an ultralight bio-based nylon coated fabric according to claim 5, characterized in that, In step (3), the spraying speed of the coating solution is 10-15 mL / h.

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