A wool outdoor fabric based on military uniform material and a preparation method thereof

Abstract

The present application relates to a kind of wool outdoor fabric based on military uniform material and its preparation method, it relates to fabric technical field, the wool outdoor fabric described is first obtained by using the blending of Kudula color master batch yarn and wool yarn as warp and weft yarn, base cloth is obtained by weaving, then it is obtained by the way of directly electrospinning and bonding in the side surface of base cloth with the way of adding functional additives with bio-based TPU as raw material;Wherein, the Kudula color master batch yarn is obtained by melting blend, spinning drafting with nylon 6,6 fiber chip and color master batch.The fabric provided by the present application can significantly improve the shortcomings of natural material wool itself by blending CORDURA material commonly used in military uniform manufacturing field and wool yarn, while fully exerting the excellent performance of wool material, the wear resistance, air permeability and moisture permeability of the fabric are excellent, can increase the comfort and experience of outdoor wear, and the application prospect is good.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fabrics, and particularly relates to a wool outdoor fabric based on military uniform material and a preparation method thereof. BACKGROUND

[0002] CORDURA fabric is prepared from T420 nylon 6,6 fiber, which is a high-performance synthetic fiber material developed and produced by DuPont. The fiber material is known for its lightweight, high strength and excellent durability. The fiber material is endowed with excellent wear resistance, tear resistance and unparalleled strength due to its special structure. The application field of T420 nylon 6,6 fiber material is very wide, and it is mainly applied in the fields of outdoor equipment and military uniform manufacturing.

[0003] Wool yarn is a high-grade fiber material commonly used in daily clothing, which has excellent moisture absorption, heat retention and lightness, so that the wool fabric prepared has good wearing comfort. However, due to the lower strength of wool than other fibers, its application in outdoor fabric is limited, and it usually needs to be blended with other high-strength fibers. Blending T420 nylon 6,6 fiber material commonly used in outdoor equipment and military uniform material with wool yarn has a good prospect in promoting the application of wool yarn in outdoor clothing.

[0004] For the development of outdoor fabric, in order to improve its functionality such as waterproof and windproof performance, a corresponding functional film is 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 adversely affect the air permeability and moisture permeability of the fabric, thereby affecting the wearability of the fabric. SUMMARY

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

[0006] The present application achieves the above-mentioned purposes through the following technical solutions:

[0007] As a first aspect of the present application, the present application provides a wool outdoor fabric based on military material, which is obtained by first blending CORDURA color master batch yarn with wool yarn to obtain blended yarn as warp and weft yarn, weaving a base cloth, and then directly electrospinning and bonding on one side surface of the base cloth by adding functional additives with bio-based TPU as raw material.

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

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

[0010] As a further optimization scheme of the present application, the wool yarn is subjected to low-temperature dyeing treatment, specifically: the weight percentage of acid dyes in the wool yarn is 0.3-3%, the bath ratio is 1:20-40, the acetic acid-sodium acetate is used to adjust the pH to 4.5-5.5, the dyeing temperature is 50-60℃, the dyeing temperature is 30-40℃, the temperature rising rate is 1-3℃ / min, the dyeing time is 60-100min, and after the wool dyeing is completed, the wool is subjected to soaping, washing, and drying treatment.

[0011] As a second aspect of the present application, the present application also provides a preparation method of the wool outdoor fabric based on military materials as described in any one of the above, specifically comprising the following steps:

[0012] (1) preparing the Cordura color master batch yarn, melting and blending nylon 6,6 fiber chips and color master batch, feeding the blend to a melt spinning machine for spinning to obtain aspun yarn, and then subjecting the aspun yarn to drawing and cooling treatment to obtain the Cordura color master batch yarn;

[0013] (2) blending the Cordura color master batch yarn prepared in step (1) with wool yarn to obtain blended yarn, and weaving the blended yarn as warp and weft yarns to obtain a base cloth, and then immersing and treating the base cloth with an acid treatment liquid;

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

[0015] As a further optimization scheme of the present application, in step (2), the step of immersing and treating the base cloth with an acid treatment liquid is: placing the base cloth in the acid treatment liquid according to a bath ratio of 1:10-20, immersing at 40-60℃ for 30min, then drying at 90-110℃ after rolling with a pick-up rate of 70-80%, and then washing and drying.

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

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

[0018] The present application has the advantages of:

[0019] (1) The present application blends the nylon 6,6 fiber of the CORDURA fabric commonly used in the field of military uniform manufacturing with wool yarn to obtain blended yarn, which is used to prepare a base cloth, and then a bio-based TPU is used as a raw material to directly electrospun and bonded on one side surface of the base cloth by adding functional additives to obtain a composite fabric. The composite fabric can significantly improve the shortcomings of natural wool material and fully exert the excellent performance of wool material, and has excellent wear resistance, air permeability and moisture permeability, and can increase the comfort and experience of outdoor wear, and has good application prospect.

[0020] (2) The cordura color master batch yarn used in the present application is obtained by melt blending and spinning stretching of nylon 6,6 fiber and color master batch, and the functional film is a bio-based TPU film, and the raw material is green and environmentally friendly.

[0021] (3) The present application optimizes the compounding method of bio-based TPU film and base cloth, realizes surface etching modification by acid treatment of the base cloth, and introduces functional additives in the spinning solution during electrospinning, so that the bonding strength of the bio-based TPU film and the base cloth is improved, and the air permeability and moisture permeability of the base cloth are not adversely affected, and the functional modification effect of the wool outdoor fabric is promoted and the wearability is ensured. DETAILED DESCRIPTION

[0022] The following further describes the present application, and it is necessary to point out here that the following detailed description is only used to further illustrate the present application, and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0023] 1. Materials and reagents

[0024] The nylon 6,6 fiber chip is obtained by short cutting treatment of commercially available nylon 6,6 fiber, and the nylon 6,6 fiber is the yarn material used in the DuPont CORDURA fabric, which is purchased from Clariant Chemicals (China) Co., Ltd.

[0025] Bio-based TPU, which is a polyurethane elastomer polymerized by bio-based polyol and MDI, has a bio-based polyol content of about 65%, and the brand is Lubrizol, USA, which is purchased from Dongguan Jincheng New Material Co., Ltd.

[0026] The specific method is not specified in the following examples, and can be carried out according to the conventional method. Other materials, reagents, etc. used, unless otherwise specified, can be obtained through commercial channels.

[0027] 2. Method

[0028] 2.1 Preparation of base cloth

[0029] (1) Preparation of Conduitra color master batch yarn: 95% by mass nylon 6,6 fiber chips and 5% by mass color master batch are melt blended, and the blend is directly fed into a screw extruder with a length-diameter ratio of 20:1 to obtain a primary filament. The process parameters of the screw extruder are as follows: the temperature of each section of the screw is 180°C for the feeding section, 230°C for the compression section, and 250°C for the metering section, the screw rotation speed is 1800 r / min, the length of the flow channel at the end of the screw extruder is 5 cm, and the length-diameter ratio of the spinneret is 10:1. The obtained primary filament is first stretched at 110°C with a stretching ratio of 3 times, and then secondly stretched at 130°C with a stretching ratio of 3 times to complete the stretching, thereby obtaining the Conduitra color master batch yarn.

[0030] (2) Dyeing treatment of wool yarn: according to the color selected by the color master batch, the wool yarn is subjected to low-temperature dyeing treatment of the corresponding color. The specific steps are as follows: the weight percentage of acid dye to wool yarn is 2%, 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 temperature rising rate is 2°C / min, and the dyeing time is 60 min. After wool dyeing, the wool is subjected to soaping, washing and drying treatment.

[0031] (3) Weaving of base cloth: the Conduitra color master batch yarn prepared in step (1) and the wool yarn obtained in step (2) are blended to obtain blended yarn, and the fineness of the blended yarn is 70 English. The blended yarn is used as warp and weft yarn to weave base cloth A. The weaving density of the warp yarn is 75 roots / cm, the weaving density of the weft yarn is 65 roots / cm, and the fabric weaving organization of the base cloth is small jacquard. In base cloth A, the proportion of wool yarn is 70%, and the proportion of nylon is 30%.

[0032] The preparation method of the base cloth is adjusted to obtain base cloths B-D, and the specific adjustment schemes are as follows:

[0033] Base cloth B: when preparing the Conduitra color master batch yarn, nylon 6 fiber chips are used instead of nylon 6,6 fiber chips;

[0034] Base cloth C: Do not prepare the test lala master batch yarn, directly blend the nylon 6,6 fiber with the wool yarn to obtain the blended yarn, and carry out high temperature dyeing treatment on the blended yarn. The specific steps are as follows: the weight percentage of acid dye in wool yarn is 2%, the bath ratio is 1:20, the pH value is adjusted to 5.5 by acetic acid-sodium acetate, the dyeing temperature is 120℃, the dyeing temperature is 60℃, the temperature rising rate is 5℃ / min, the dyeing time is 60min, and after the blended yarn is dyed, it is treated by soaping, washing and drying.

[0035] Base cloth D: The fabric weaving organization of the base cloth is a common plain pattern.

[0036] 2.2, film coating treatment of base cloth

[0037] (1) Pretreatment of base cloth: the base cloth A is immersed and treated with acid treatment liquid. Specifically, the base cloth is placed in the acid treatment liquid according to the bath ratio of 1:10, immersed at 50℃ for 30min, the pick-up rate is 70%, and after drying at 100℃, it is washed and dried. The acid treatment liquid is a salicylic acid solution with a mass concentration of 5%.

[0038] (2) Film coating treatment of base cloth: add bio-based TPU and functional additives (polydimethylsiloxane) into N,N-dimethylformamide to obtain a spinning solution. The mass concentration of bio-based TPU in the spinning solution is 15%, and the mass concentration of functional additives is 4%. After electrospinning the spinning solution onto one side of the base cloth, the wool outdoor fabric A based on military materials is obtained by hot pressing. The process parameters of electrospinning are as follows: spinning voltage is 25kV, receiving distance is 15cm, temperature is 20℃, relative humidity is 40%; hot pressing time is 2min, pressure is 2MPa, and temperature is 75℃.

[0039] Adjust the preparation process of the wool outdoor fabric to obtain wool outdoor fabrics B-E. The specific adjustment scheme is as follows:

[0040] Wool outdoor fabric B: the base cloth is not immersed and treated with acid treatment liquid.

[0041] Wool outdoor fabric C: the base cloth is not immersed and treated with acid treatment liquid, but a layer of washed polyurethane glue is sprayed on the surface of the base cloth, and after curing for 24 hours, the step (2) film coating treatment of base cloth is carried out.

[0042] Wool outdoor fabric D: the base cloth is not immersed and treated with acid treatment liquid, but a layer of hot melt net film is attached to the surface of the base cloth, and then the step (2) film coating treatment of base cloth is carried out.

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

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

[0045] 3. Performance test

[0046] 3.1. Anti-tear performance test of base fabrics A-D

[0047] The test was conducted in accordance with GB / T3917-1:2009 "Fabric tear resistance Part 1: Determination of tear strength by the impact pendulum method". In addition, a base fabric prepared from pure wool yarn was used as a control group 1, and the results are shown in Table 1.

[0048] Table 1. Anti-tear performance test results

[0049]

[0050] As can be seen from the table, the base fabric A obtained by blending the Kordula color masterbatch yarn with the wool yarn has better anti-tear performance than the pure wool fabric (control group 1) due to the use of nylon 6,6 fiber in the Kordula color masterbatch yarn. At the same time, the use of small jacquard weaving structure during weaving of the base fabric A also improves the anti-tear performance of the fabric to some extent compared to the base fabric D which is woven in a plain weave.

[0051] The base fabric C, which does not use the design idea of color masterbatch yarn like the base fabric A, directly blends nylon 6,6 fiber with wool yarn to obtain blended yarn. In order to ensure the dyeing effect of the blended yarn, high temperature dyeing process is selected for dyeing the blended yarn. However, due to the adverse effect of high temperature dyeing on the mechanical properties of wool yarn, the anti-tear performance of the base fabric C is reduced to some extent compared to the base fabric A. In summary, blending the Kordula color masterbatch yarn with the wool yarn can meet the dyeing requirements of the base fabric by only low temperature dyeing of the wool yarn, while ensuring excellent anti-tear performance of the base fabric.

[0052] 3.2. Felting test of base fabrics A-D

[0053] According to the test standards of GB8629.2001 and ISWTM NO.31, the machine and water washing shrinkage of wool samples was tested using a full-automatic shrinkage tester. The base fabrics A-D and the control group were cut into a size of 500mm x 500mm, and 3 groups of marks were made in the warp and weft directions respectively. Before testing, the distance between the marks was measured to calculate the marked area as the original size of the fabric S0. Then the wool samples were washed according to the standard program (7A+3x5A), with a washing temperature of 40℃. After the test, the wool samples were balanced for 48h under standard atmospheric conditions (temperature 20±1℃, relative humidity 65±5%), and the distance between the marks was measured again to calculate the area of the fabric after washing Sl Shrinkage of the fabric was calculated using the following formula: Shrinkage S% = (So - Si) / Si o x 100%.

[0054] The results are shown in Table 2.

[0055] Table 2 Shrinkage test results

[0056]

[0057] As can be seen from Table 2, the base fabric A prepared from the blended yarn obtained by blending the Kordus masterbatch yarn with the wool yarn has a greatly reduced fabric shrinkage compared to the pure wool fabric (control group 1) due to the use of nylon 6,6 fiber raw material in the Kordus masterbatch yarn, and the difference is not significant compared to base fabric B, because the high strength, good flexibility of nylon 6,6 fiber and nylon 6 fiber can improve the high shrinkage of wool yarn when blended with wool yarn, so that the fabric can be machine washed, and the wearability is improved. In addition, the shrinkage of base fabric C is also slightly increased compared to base fabric A, but the difference is not significant.

[0058] 3.3, Abrasion fastness test of wool outdoor fabric A-E

[0059] Y571B type rubbing color fastness tester was selected, standard wool abrasive was used, the film side of wool outdoor fabric A-E was placed on the circular rubbing head of the sponge pad layer (flat grinding), and the rubbing test was carried out (rubbing times were 400 times), each sample was tested 5 times, and the average value was taken. Wet treatment means that the fabric is soaked in water for 3 hours, and the liquid rate during rubbing test is 30%. The results are shown in Table 3.

[0060] Table 3 Abrasion fastness test results

[0061]

[0062]

[0063] As can be seen from Table 3, wool outdoor fabric C and wool outdoor fabric D are compounded with TPU by chemical bonding and hot melt bonding respectively. From the results, the abrasion resistance of wool outdoor fabric C (without acid treatment of the base fabric) and wool outdoor fabric E (without the addition of functional additives) is better. Wool outdoor fabric A is compounded with TPU by acid treatment of the base fabric and the addition of functional additives in the spinning solution, which improves the abrasion resistance of the base fabric to a certain extent. The base fabric is immersed in a salicylic acid solution, which etches the surface of the base fabric and introduces hydroxyl groups onto the surface of the base fabric. Then, by adding a functional additive, polydimethylsiloxane, to the spinning solution, the silicon-oxygen bond in the polydimethylsiloxane further combines with the hydroxyl groups on the surface of the base fabric during electrospinning, thereby improving the abrasion resistance of TPU on the base fabric. As a result, the abrasion resistance of wool outdoor fabric A is improved to a certain extent compared to wool outdoor fabric C (without acid treatment of the base fabric) and wool outdoor fabric E (without the addition of functional additives).

[0064] 3.4. Air permeability and moisture permeability test of wool outdoor fabric A-E

[0065] (1) Air permeability test: According to the national standard (GB / T5433), the air permeability of the sample was tested by YG461G type fabric full-automatic air permeability tester. The experimental parameters were set as follows: environmental temperature 25℃, relative humidity 60%, pressure difference 100Pa, air permeability area 20cm 2 , the diameter of the air jet nozzle was 0.8mm. The fabric samples were tested at 5 different positions, 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 by FX3180 type moisture permeability tester. During the test, the temperature was 38℃, the humidity was 90.0%, the air flow rate was 0.5m / s, and the test area was 28.5cm 2 . Before testing, the test chamber needs to be pre-humidified. After automatic humidity adjustment, the instrument starts the moisture permeability test, and automatically records the moisture permeability data every 1 hour, a total of twice. After the experiment is completed, the moisture permeability data of the sample is manually recorded, and the average value of 5 experimental data of each group of samples is taken as the final data.

[0067] The results are shown in Table 4.

[0068] Table 4 Air permeability and moisture permeability test results

[0069]

[0070]

[0071] It can be seen from Table 4 that the wool outdoor fabric A has more excellent air permeability and moisture permeability compared with other groups, and the direct spinning and bonding on the base cloth does not cause adverse effects on the air permeability and moisture permeability of the fabric compared with the chemical bonding and hot melt bonding of the wool outdoor fabrics C-D, thereby ensuring that the fabric has excellent mechanical properties and excellent air permeability and moisture permeability, which is helpful to improve the wearing comfort of the outdoor wool fabric and improve the application prospect.

[0072] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A wool outdoor fabric based on military materials, characterized by: The wool outdoor fabric is firstly obtained by blending Cordura masterbatch yarn and wool yarn as warp and weft yarns, and weaving a base fabric to obtain the blended yarn, and then impregnating the base fabric with an acid treatment solution. The specific steps are as follows: placing the base fabric in the acid treatment solution according to a bath ratio of 1:10-20, impregnating at 40-60°C for 30 minutes, and then drying at a rolling rate of 70-80%. The acid treatment solution is a salicylic acid solution with a mass concentration of 1-5%. Then, the bio-based TPU is used as a raw material and is directly electrospun and bonded to the surface of one side of the base fabric by adding a functional additive, and the functional additive is polydimethylsiloxane. The Cordura masterbatch yarn is obtained by melt blending and spinning and drawing nylon 6,6 fiber chips and masterbatch; the wool yarn is subjected to a low-temperature dyeing treatment, specifically: the acid dye accounts for 0.3-3% of the weight percentage of the wool yarn, 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 is dyed, it can be soaped, washed with water, and dried.

2. The wool outdoor fabric based on military materials according to claim 1, characterized in that: The weaving parameters of the base cloth 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 cloth is small jacquard.

3. A method for preparing a wool outdoor fabric based on military materials according to any one of claims 1-2, characterized in that: The specific steps include: (1) preparing a Cordura masterbatch yarn by melt-blending nylon 6,6 fiber slices and masterbatch, sending the blend to a melt spinning machine for spinning to obtain spun yarn, and then drawing and cooling the spun yarn 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 weaving the blended yarn as warp and weft yarn to obtain a base fabric, and impregnating the base fabric with an acid treatment solution; (3) Bio-based TPU and functional additives are added to N,N-dimethylformamide and stirred evenly to obtain a spinning solution, and 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 based on military materials.

4. The method for preparing a wool outdoor fabric based on military materials according to claim 3, 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%.

5. The method for preparing a wool outdoor fabric based on military materials according to claim 3, 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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