Wool outdoor fabric based on military uniform material and preparation method thereof

Abstract

The invention relates to a wool outdoor fabric based on a military uniform material and a preparation method of the wool outdoor fabric, and relates to the technical field of fabrics, the wool outdoor fabric is prepared by the following steps of: firstly, weaving blended yarns which are obtained by blending Coodola color master batch yarns and wool yarns and are used as warp and weft yarns to obtain base cloth; and directly adhering the bio-based TPU serving as a raw material to the surface of one side of the base cloth through electrostatic spinning in a mode of adding a functional additive, wherein the codolar color master batch yarn is obtained by carrying out melt blending, spinning and drafting on nylon 6, 6 fiber slices and color master batches. According to the fabric, the CORDURA material commonly applied to the field of military uniform manufacturing is blended with the wool yarn, the defects of natural material wool can be remarkably overcome, meanwhile, the excellent performance of the wool material is fully played, the fabric is excellent in wear resistance and air and moisture permeability, outdoor wearing comfort and experience can be improved, and the application prospect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of fabrics, and in particular relates to a wool outdoor fabric based on military uniform materials and a preparation method thereof. Background Art

[0002] CORDURA fabric is made of T420 nylon 6,6 fiber, which is a high-performance synthetic fiber material developed and produced by DuPont. This fiber material is famous for its light weight, high strength and excellent durability. Its special structure gives it excellent wear resistance, tear resistance and unparalleled strength. T420 nylon 6,6 fiber material has a wide range of applications, mainly in outdoor equipment and military uniform manufacturing.

[0003] Wool yarn is a high-grade fiber material commonly used in daily clothing. It has excellent moisture absorption, heat preservation and light weight, which makes the prepared wool fabrics more comfortable to wear. However, because wool is weaker than other fibers, its application in outdoor fabrics is limited and it usually needs to be blended with other high-strength fibers. Blending T420 nylon 6,6 fiber materials commonly used in outdoor equipment and military uniforms with wool yarn has a good prospect in promoting the application of wool yarn in outdoor clothing.

[0004] In the development of outdoor fabrics, in order to improve their functionality, for example, waterproof and windproof properties, the corresponding functional film will be compounded on the surface of the fabric. The interface stability and bonding strength between the functional film and the fabric will affect the durability of the fabric. In addition, improper selection of the compounding method of the functional film and the fabric will also have an adverse effect on the air permeability and moisture permeability of the fabric itself, thereby affecting the wearing performance of the fabric. Summary of the invention

[0005] The purpose of the present invention is to provide a wool outdoor fabric based on military uniform material and a preparation method thereof in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] As a first aspect of the present invention, the present invention provides a wool outdoor fabric based on military materials, wherein the wool outdoor fabric is firstly obtained by blending Cordura masterbatch yarn and wool yarn to obtain a blended yarn as warp and weft yarn, weaving to obtain a base fabric, and then using bio-based TPU as a raw material by adding functional additives and directly electrospinning and bonding it to one side of the surface of the base fabric; wherein the Cordura masterbatch yarn is obtained by melt blending and spinning and drawing nylon 6,6 fiber chips and masterbatches.

[0008] As a further optimization scheme of the present invention, the weaving parameters of the base cloth are: the fineness of the blended yarn is 40-70 English count, the weaving density of the warp yarn is 50-75 yarns / cm, the weaving density of the weft yarn is 45-65 yarns / cm, and the fabric weaving structure of the base cloth is a small jacquard.

[0009] As a further optimization solution of the present invention, the functional auxiliary agent is polydimethylsiloxane.

[0010] As a further optimization scheme of the present invention, the wool yarn is subjected to low-temperature dyeing treatment, specifically: the weight percentage of acid dye in the wool yarn is 0.3-3%, the bath ratio is 1:20-40, the pH is adjusted to 4.5-5.5 by acetic acid-sodium acetate, the dyeing temperature is 50-60°C, the dyeing temperature is 30-40°C, the heating rate is 1-3°C / min, and the dyeing time is 60-100min. After the wool dyeing is completed, it can be soaped, washed with water, and dried.

[0011] As a second aspect of the present invention, the present invention also provides a method for preparing the wool outdoor fabric based on military materials as described above, which specifically comprises the following steps:

[0012] (1) preparing a Cordura masterbatch yarn by melt-blending nylon 6,6 fiber slices and masterbatches, sending the blend to a melt spinning machine for spinning to obtain spun yarn, and then subjecting the spun yarn to drafting and cooling to obtain the Cordura masterbatch yarn;

[0013] (2) blending the Cordura masterbatch yarn prepared in step (1) with wool yarn to obtain a blended yarn, and using the blended yarn as warp and weft yarns to weave a base fabric, and impregnating the base fabric with an acid treatment solution;

[0014] (3) adding bio-based TPU and functional additives into N,N-dimethylformamide and stirring evenly to obtain a spinning solution, electrospinning the spinning solution onto one surface of a base fabric and then hot-pressing to obtain the wool outdoor fabric based on military materials.

[0015] As a further optimization scheme of the present invention, in step (2), the step of immersing the base fabric in an acid treatment liquid is as follows: placing the base fabric in the acid treatment liquid according to a bath ratio of 1:10-20, immersing it at 40-60°C for 30 minutes, with a rolling rate of 70-80%, drying at 90-110°C, and then washing and drying, wherein the acid treatment liquid is a salicylic acid solution with a mass concentration of 1-5%.

[0016] As a further optimization scheme of the present invention, in step (3), the mass concentration of the bio-based TPU in the spinning solution is 10-15%, and the mass concentration of the functional additive is 2-6%.

[0017] As a further optimization scheme of the present invention, in step (3), the process parameters of electrospinning are spinning voltage of 25-30 kV, receiving distance of 15-20 cm, temperature of 20-25° C., and relative humidity of 40-50%.

[0018] The beneficial effects of the present invention are:

[0019] (1) The present invention blends nylon 6,6 fiber of CORDURA fabric commonly used in the field of military uniform manufacturing with wool yarn to obtain blended yarn, which is used to prepare base fabric, and then uses bio-based TPU as a raw material to directly electrospin and bond it to one side of the base fabric by adding functional additives to obtain a composite fabric. The composite fabric can significantly improve the shortcomings of natural material wool itself and can give full play to the excellent performance of wool material, with excellent wear resistance, air permeability and moisture permeability, which can increase the comfort and experience of outdoor wearing, and has good application prospects;

[0020] (2) The Cordura masterbatch yarn used in this application is obtained by melt blending, spinning and drawing nylon 6,6 fiber and masterbatch, and the functional film used is a bio-based TPU film, and the raw materials are green and environmentally friendly;

[0021] (3) The present invention optimizes the composite method of the bio-based TPU film and the base fabric, and involves performing surface etching modification on the base fabric by acid treatment, and introducing functional additives into the spinning solution during electrospinning, so that the bonding strength between the bio-based TPU film and the base fabric is improved, while at the same time, the air permeability and moisture permeability of the base fabric are not adversely affected, thereby promoting the functional modification effect of the wool outdoor fabric and ensuring its wearing performance. DETAILED DESCRIPTION

[0022] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] 1. Materials and reagents

[0024] Nylon 6,6 fiber slices are obtained by chopping commercially available nylon 6,6 fibers, which are yarn materials used in DuPont CORDURA fabrics and were purchased from Clariant Chemicals (China) Co., Ltd.

[0025] Bio-based TPU, a polyurethane elastomer made by polymerizing bio-based polyols and MDI, with a bio-based content of about 65% of the polyols. The brand is Lubrizol from the United States and was purchased from Dongguan Jincheng New Materials Co., Ltd.

[0026] In the following examples, any method not specified may be carried out according to conventional methods, and other materials, reagents, etc. used may be obtained through commercial channels unless otherwise specified.

[0027] 2. Methods

[0028] 2.1. Preparation of base fabric

[0029] (1) Preparation of Cordura masterbatch yarn: 95% by mass of nylon 6,6 fiber chips and 5% by mass of masterbatch were melt blended, and the blend was directly fed into a screw extruder with a length-to-diameter ratio of 20:1 for melt extrusion to obtain spun yarn. The process parameters of the screw extruder were as follows: the temperatures of the screw sections were 180°C for the feeding section, 230°C for the compression section, and 250°C for the metering section, the screw speed was 1800 r / min, the length of the flow channel at the end of the screw extruder was 5 cm, the aspect ratio of the spinneret was 10:1, and the obtained spun yarn was subjected to primary drawing at 110°C with a drawing multiple of 3 times, and secondary drawing at 130°C with a drawing multiple of 3 times to complete the drawing, thereby obtaining Cordura masterbatch yarn.

[0030] (2) Dyeing of wool yarn: According to the color selected by the above masterbatch, the wool yarn is subjected to low-temperature dyeing of the corresponding color. The specific steps are as follows: the acid dye accounts for 2% of the weight percentage of the wool yarn, the bath ratio is 1:20, the pH is adjusted to 5.5 by acetic acid-sodium acetate, the dyeing temperature is 50°C, the dyeing temperature is 30°C, the heating rate is 2°C / min, and the dyeing time is 60min. After the wool is dyed, it can be washed with soap, water and dried.

[0031] (3) Weaving of base fabric: the Cordura masterbatch yarn prepared in step (1) is blended with the wool yarn obtained in step (2) to obtain a blended yarn, wherein the fineness of the blended yarn is 70 Ne, and the blended yarn is used as the warp and weft yarns to weave base fabric A, wherein the weaving density of the warp yarn is 75 yarns / cm, and the weft yarn is 65 yarns / cm. The fabric weaving structure of the base fabric is a small jacquard, and in the base fabric A, the wool yarn accounts for 70% and the nylon accounts for 30%;

[0032] The preparation method of the base fabric is adjusted to prepare the base fabric BD. The specific adjustment scheme is as follows:

[0033] Base fabric B: In the preparation of Cordura masterbatch yarn, nylon 6 fiber slices were used instead of nylon 6,6 fiber slices;

[0034] Base fabric C: Without preparing Cordura masterbatch yarn, nylon 6,6 fiber is directly blended with wool yarn to obtain blended yarn, and the blended yarn is subjected to high-temperature dyeing treatment. The specific steps are: the weight percentage of acid dye in wool yarn is 2%, the bath ratio is 1:20, acetic acid-sodium acetate is used to adjust the pH to 5.5, the dyeing temperature is 120°C, the dyeing temperature is 60°C, the heating rate is 5°C / min, and the dyeing time is 60min. After the blended yarn is dyed, it is subjected to soaping, water washing, and drying treatment.

[0035] Base fabric D: The fabric weaving structure of the base fabric is ordinary plain weave style.

[0036] 2.2. Lamination treatment of base fabric

[0037] (1) Pretreatment of the base fabric: The base fabric A is treated by immersion in an acid treatment solution. Specifically, the base fabric is placed in the acid treatment solution according to a bath ratio of 1:10, immersed at 50° C. for 30 min, with a rolling rate of 70%, dried at 100° C., and then washed and dried. The acid treatment solution is a salicylic acid solution with a mass concentration of 5%.

[0038] (2) Coating treatment of the base fabric: Bio-based TPU and functional additives (polydimethylsiloxane) are added to N, N-dimethylformamide and stirred to obtain a spinning solution, wherein the mass concentration of bio-based TPU in the spinning solution is 15%, and the mass concentration of functional additives is 4%. The spinning solution is electrospun onto the surface of one side of the base fabric and then hot-pressed to obtain the wool outdoor fabric A based on military materials. The process parameters of electrospinning are spinning voltage of 25 kV, receiving distance of 15 cm, temperature of 20°C, relative humidity of 40%; hot pressing time of 2 min, pressure of 2 MPa, and temperature of 75°C.

[0039] The preparation process of wool outdoor fabric is adjusted to obtain wool outdoor fabric BE. The specific adjustment plan is as follows:

[0040] Wool outdoor fabric B: The base fabric is not impregnated with acid treatment liquid;

[0041] Wool outdoor fabric C: The base fabric is not impregnated with an acid treatment solution, but a layer of water-washable polyurethane glue is sprayed on the surface of the base fabric. After curing for 24 hours, the base fabric is subjected to the step (2) of laminating.

[0042] Wool outdoor fabric D: The base fabric is not treated with acid treatment solution immersion. Instead, a layer of hot-melt mesh is attached to the surface of the base fabric, and then (2) the base fabric is coated.

[0043] Wool outdoor fabric E: In the coating step of the base fabric, no functional additive (polydimethylsiloxane) is added to the spinning solution, but the same amount of bio-based TPU is added.

[0044] Control group 2: In the coating treatment step of the base fabric, polyvinyl pyrrolidone (PVP) was added to the spinning solution.

[0045] 3. Performance testing

[0046] 3.1. Tear resistance test of base fabric AD

[0047] The test was conducted according to GB / T3917-1:2009 "Tear properties of fabrics - Part 1 - Determination of tear strength by impact pendulum method". In addition, a base fabric made of pure wool yarn was used as control group 1, and the results are shown in Table 1.

[0048] Table 1 Tear resistance test results

[0049]

[0050] As can be seen from the table, the base fabric A prepared by blending the Cordura masterbatch yarn and the wool yarn has better tear resistance than the pure wool fabric (control group 1) by virtue of the nylon 6,6 fiber used in the Cordura masterbatch yarn. At the same time, the small jacquard weaving structure used in the weaving of the base fabric A also improves the tear resistance of the fabric to a certain extent compared with the plain weaving method of the base fabric D.

[0051] Compared with base fabric A, base fabric C does not adopt the design concept of masterbatch yarn. It directly blends nylon 6,6 fiber with wool yarn to obtain blended yarn. In order to ensure the dyeing effect of the blended yarn, a high-temperature dyeing process is selected to dye the blended yarn. However, due to the adverse effect of high-temperature dyeing of wool yarn on its mechanical properties, the tear resistance of base fabric C is reduced to a certain extent compared with base fabric A. In summary, it can be seen that when Cordura masterbatch yarn is blended with wool yarn, wool yarn only needs low-temperature dyeing to meet the dyeing requirements of the base fabric, while ensuring that the base fabric has excellent tear resistance.

[0052] 3.2. Felting test of base fabric AD

[0053] With reference to GB8629.2001 and ISWTMNO.31 test standards, a fully automatic shrinkage tester was used to test the machine wash felt shrinkage of wool samples. The base fabric AD and the control group were cut into specifications of 500mm×500mm, and 3 groups of marks were made in the warp and weft directions of the sample respectively. Before the test, the distance between the marks was measured to calculate the marked area, which was used as the original size S0 of the fabric. The wool samples were then washed according to the standard procedure (7A+3×5A), and the washing temperature was set to 40°C. After the test, the wool samples were balanced under standard atmospheric conditions (temperature 20±1°C, relative humidity 65±5%) for 48 hours, and the distance between the marks was measured again to calculate the fabric area S after washing.l The felt shrinkage of the fabric is calculated using the following formula: Felting rate S% = (S0-S1) / S o ×100%.

[0054] The results are shown in Table 2.

[0055] Table 2 Felting test results

[0056]

[0057] As can be seen from Table 2, the base fabric A prepared by blending the blended yarn obtained by blending Cordura masterbatch yarn and wool yarn has a greatly reduced felting rate compared with pure wool fabric (control group 1) by virtue of the nylon 6,6 fiber raw material used in the Cordura masterbatch yarn, and the difference is not significant compared with the base fabric B. The reason is that the high strength and good flexibility of nylon 6,6 fiber and nylon 6 fiber can improve the high felting rate of wool yarn when blended with wool yarn, making the fabric machine washable and improving the wearing performance. In addition, the felting rate of base fabric C is also slightly increased compared with base fabric A, but the difference is not significant.

[0058] 3.3. Abrasion resistance and bonding fastness test of wool outdoor fabric AE

[0059] The Y571B type friction color fastness tester was used, and the standard wool abrasive was used. The coated side of the wool outdoor fabric AE was placed on the circular friction head (flat grinding) of the sponge cushion layer for friction test (the number of frictions was 400 times). Each sample was tested 5 times, and the results were averaged. Wet treatment refers to soaking the fabric in water for 3 hours, and the liquid waiting rate during the friction test is 30%. The results are shown in Table 3.

[0060] Table 3 Abrasion resistance test results

[0061]

[0062]

[0063] As can be seen from Table 3, wool outdoor fabric C and wool outdoor fabric D respectively use chemical bonding and hot melt bonding to compound the base fabric with TPU. From the results, compared with wool outdoor fabric C (without acid treatment of the base fabric) and wool outdoor fabric E (without adding functional additives), the wear-resistant bonding fastness is better, while wool outdoor fabric A improves the wear-resistant bonding fastness of the base fabric and TPU composite to a certain extent by acid treatment of the base fabric and adding functional additives to the spinning solution. The base fabric is impregnated with a salicylic acid solution, so that the surface of the base fabric is etched by the acid solution and hydroxyl groups are introduced on the surface of the base fabric. Then, by adding a functional additive polydimethylsiloxane to the spinning solution, the silicon oxygen bond contained in polydimethylsiloxane is further combined with the hydroxyl group on the surface of the base fabric during the electrospinning process, and then the TPU is spun to obtain the bonding fastness of the base fabric. Therefore, the wear-resistant bonding fastness of wool outdoor fabric A is improved to a certain extent compared with wool outdoor fabric C (without acid treatment of the base fabric) and wool outdoor fabric E (without adding functional additives).

[0064] 3.4. Test on air and moisture permeability of wool outdoor fabric AE

[0065] (1) Air permeability test: Referring to the national standard (GB / T5433), the air permeability of the samples was tested using the YG461G fabric automatic air permeability meter. The specific experimental parameters were set as follows: ambient temperature 25°C, relative humidity 60%, pressure difference 100Pa, air permeability area 20cm 2 , the diameter of the air nozzle is 0.8mm. The fabric samples were tested 5 times at different locations, and the average value was taken as the final air permeability data.

[0066] (2) Moisture permeability test: According to the national standard GB / T12704.1-2009 (a), the moisture permeability of the sample was tested using the FX3180 moisture permeability measuring instrument. During the test, the temperature was 38°C, the humidity was 90.0%, the air flow rate was 0.5m / s, and the test area was 28.5cm 2 Before the test, the test chamber needs to be pre-humidified. After the automatic humidity adjustment is completed, the instrument starts the moisture permeability test and automatically records the moisture permeability data once every hour, twice in total. After the experiment is completed, the moisture permeability data of the sample is manually recorded, and the average of 5 groups of experimental data for each group of samples is used as the final data.

[0067] The results are shown in Table 4.

[0068] Table 4 Air and moisture permeability test results

[0069]

[0070]

[0071] As can be seen from Table 4, wool outdoor fabric A has better air permeability and moisture permeability than other groups. It adopts the method of direct spinning and bonding on the base fabric, which will not have an adverse effect on the air permeability and moisture permeability of the fabric compared to the chemical bonding and hot melt bonding methods adopted by wool outdoor fabric CD. It ensures that the fabric has excellent mechanical properties and excellent air permeability and moisture permeability, which helps to improve the wearing comfort of outdoor wool fabrics and improve their application prospects.

[0072] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A wool outdoor fabric based on military materials, characterized by: The wool outdoor fabric is obtained by first using the blended yarn obtained by blending Cordura masterbatch yarn and wool yarn as warp and weft yarn, weaving to obtain the base fabric, and then using bio-based TPU as a raw material by adding functional additives and directly electrospinning and bonding it to the surface of one side of the base fabric; wherein the Cordura masterbatch yarn is obtained by melt blending and spinning and drawing nylon 6,6 fiber chips and masterbatches.

2. The wool outdoor fabric based on military materials according to claim 1, characterized in that: The weaving parameters of the base fabric are as follows: the fineness of the blended yarn is 40-70 Ne, the weaving density of the warp yarn is 50-75 yarns / cm, the weaving density of the weft yarn is 45-65 yarns / cm, and the fabric weaving structure of the base fabric is a small jacquard.

3. The wool outdoor fabric based on military materials according to claim 1, characterized in that: The functional auxiliary agent is polydimethylsiloxane.

4. The wool outdoor fabric based on military materials according to claim 1, characterized in that: The wool yarn is subjected to low-temperature dyeing treatment, specifically: the weight percentage of the acid dye in the wool yarn is 0.3-3%, the bath ratio is 1:20-40, the pH value is adjusted to 4.5-5.5 by acetic acid-sodium acetate, the dyeing temperature is 50-60°C, the dyeing temperature is 30-40°C, the heating rate is 1-3°C / min, the dyeing time is 60-100min, and after the wool dyeing is completed, it can be subjected to soaping, water washing and drying treatment.

5. A method for preparing a wool outdoor fabric based on military materials as claimed in any one of claims 1 to 4, characterized in that: The specific steps include: (1) preparing a Cordura masterbatch yarn by melt-blending nylon 6,6 fiber slices and masterbatches, sending the blend to a melt spinning machine for spinning to obtain spun yarn, and then subjecting the spun yarn to drafting and cooling to obtain the Cordura masterbatch yarn; (2) blending the Cordura masterbatch yarn prepared in step (1) with wool yarn to obtain a blended yarn, and using the blended yarn as warp and weft yarns to weave a base fabric, and impregnating the base fabric with an acid treatment solution; (3) adding bio-based TPU and functional additives into N,N-dimethylformamide and stirring evenly to obtain a spinning solution, electrospinning the spinning solution onto one surface of a base fabric and then hot-pressing to obtain the wool outdoor fabric based on military materials.

6. The method for preparing wool outdoor fabric based on military materials according to claim 5, characterized in that: In step (2), the base fabric is immersed in the acid treatment liquid according to a bath ratio of 1:10-20, immersed at 40-60°C for 30 minutes, with a rolling rate of 70-80%, dried at 90-110°C, washed and dried, and the acid treatment liquid is a salicylic acid solution with a mass concentration of 1-5%.

7. The method for preparing a wool outdoor fabric based on military materials according to claim 5, characterized in that: In step (3), the mass concentration of the bio-based TPU in the spinning solution is 10-15%, and the mass concentration of the functional additive is 2-6%.

8. The method for preparing a wool outdoor fabric based on military materials according to claim 5, characterized in that: In step (3), the process parameters of electrospinning are spinning voltage of 25-30 kV, receiving distance of 15-20 cm, temperature of 20-25° C., and relative humidity of 40-50%.

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