A down jacket warm-keeping fabric containing PCM microcapsules and a production method thereof

Abstract

This invention relates to a down jacket thermal insulation fabric containing PCM microcapsules and its production method. The PCM microcapsule-containing down jacket thermal insulation fabric includes an inner layer, a middle layer, and an outer layer connected in sequence. The middle layer includes a protective layer one and a protective layer two respectively disposed on opposite sides of the inner and outer layers. Both protective layers one and two have a continuous alternating concave-convex structure, and the concave positions of the protective layers one and two are correspondingly arranged to form a receiving cavity. This invention can significantly improve the tear resistance, warmth, and down-proof properties of the fabric by setting reinforcement members inside the receiving cavity between protective layers one and two. When the two ends of the support strip extend to both sides to form pressing parts, and the pressing parts extend to the middle of the corresponding protrusions of protective layers one and two for heat-pressing and fixing, the tear resistance, warmth, and down-proof properties of the fabric can be further improved.

Description

Technical Field

[0001] This invention belongs to the field of clothing fabric technology, specifically relating to a down jacket thermal insulation fabric containing PCM microcapsules and its production method. Background Technology

[0002] The primary application of PCM microcapsules in down jacket fabrics is to provide protection, especially in extremely cold weather. These microcapsules can enhance the heat storage capacity of down jacket fabrics, keeping wearers warm in cold environments. PCM microcapsules can be coated on the fabric surface or embedded within the fibers. However, PCM microcapsules coated on the fabric surface are prone to peeling off after repeated washing, significantly reducing the warmth retention of the down jacket fabric. In addition, down jacket fabrics also require tear resistance, durability, and good down-proof performance to avoid or reduce down leakage after repeated washing. Based on these issues, we provide a down jacket thermal fabric with a PCM microcapsule coating that is not easily peeled off and has good tear resistance and down-proof performance. Summary of the Invention

[0003] The purpose of this invention is to provide a down jacket thermal insulation fabric containing PCM microcapsules and its production method in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] A down jacket thermal insulation fabric containing PCM microcapsules, comprising an inner layer, a middle layer and an outer layer connected in sequence;

[0006] The intermediate layer includes a protective layer one and a protective layer two respectively disposed on opposite sides of the inner and outer layers. Both the protective layer one and the protective layer two are continuous alternating concave and convex structures. The concave positions of the protective layer one and the protective layer two are arranged correspondingly to form a receiving cavity. Each receiving cavity is provided with a reinforcing member inside.

[0007] The reinforcement includes a support bar, a cavity formed inside the support bar, and a PCM microcapsule coating disposed inside the cavity and on the outer wall of the support bar.

[0008] As a further optimization of the present invention, the middle positions of both the upper and lower surfaces of the support strip are recessed inward to form a recessed portion.

[0009] As a further optimization of the present invention, the two ends of the support strip extend to both sides to form pressing portions, and the pressing portions extend to the middle of the corresponding protrusions of the first protective layer and the second protective layer and are hot-pressed and bonded.

[0010] As a further optimization of the present invention, the first protective layer, the second protective layer, and the support strip are all made of polyamide or polypropylene.

[0011] A method for producing a down jacket thermal insulation fabric containing PCM microcapsules, the specific steps of which are as follows:

[0012] Step 1: Extrude protective layer 1 and protective layer 2 in one piece using a mold on the inner and outer layers. Extrude support strips with internal cavities in one piece using a mold. Both protective layer 1 and protective layer 2 are continuous alternating concave and convex structures.

[0013] Step 2: Coat the outer wall of the support strip with PCM microcapsule coating, pour the PCM microcapsule coating into the cavity, level and dry it to obtain the reinforcement.

[0014] Step 3: Place the inner and outer layers with protective layer 1 and protective layer 2 facing each other, wherein the recessed positions of protective layer 1 and protective layer 2 are placed facing each other to form a receiving cavity, and the protruding positions of protective layer 1 and protective layer 2 are placed facing each other, and the reinforcement obtained in step 2 is placed inside each receiving cavity.

[0015] Step 4: After hot pressing the inner layer, protective layer 1, reinforcement, protective layer 2, and outer layer placed in step 3, the down jacket thermal insulation fabric containing PCM microcapsules is obtained. The hot pressing positions are the raised positions of protective layer 1 and protective layer 2.

[0016] As a further optimization of the present invention, in step two, the coating amount on the outer wall of the support strip is 140-150 g / m. 2 The injection volume inside the cavity is 120-130 g / m³. 2 .

[0017] As a further optimization of the present invention, in step four, the hot pressing temperature is 145-160℃, the hot pressing pressure is 5-8MPa, the number of hot pressing cycles is 3-5, and the hot pressing time for each cycle is 2-3min.

[0018] As a further optimization of the present invention, in step one, the support strip is integrally formed with pressing parts on both sides; in step three, the pressing parts on two adjacent support strips need to be placed in the middle of the protruding positions of protective layer one and protective layer two.

[0019] The beneficial effects of this invention are as follows:

[0020] 1) By setting a reinforcement inside the cavity between the first protective layer and the second protective layer, the present invention can greatly improve the tear resistance, warmth and down-proof properties of the fabric. When the two ends of the support strip extend to both sides to form a pressing part, and the pressing part extends to the middle of the corresponding protrusions of the first and second protective layers and is hot-pressed and fixed, the tear resistance, warmth and down-proof properties of the fabric can be further improved.

[0021] 2) This invention injects PCM microcapsule coating into the cavity and allows it to flow and adhere to the inner wall of the cavity. Compared with directly coating the PCM microcapsule coating on the surface of the support strip, this method is less likely to fall off after multiple washes and can maintain better durability, thus enabling the fabric to achieve a long-lasting warmth retention effect. Attached Figure Description

[0022] Figure 1 This is a cross-sectional schematic diagram of the down jacket thermal insulation fabric containing PCM microcapsules according to Embodiment 1 of the present invention.

[0023] Figure 2 This is the invention Figure 1 A partial structural diagram.

[0024] Figure 3 This is a cross-sectional schematic diagram of the down jacket thermal insulation fabric containing PCM microcapsules according to Embodiment 2 of the present invention.

[0025] Figure 4 This is the invention Figure 3 A partial structural diagram.

[0026] Figure 5 This is a cross-sectional schematic diagram of the first protective layer and the second protective layer of the present invention.

[0027] Figure 6 This is a cross-sectional schematic diagram of the reinforcement component of the present invention.

[0028] In the diagram: 1. Inner layer; 2. Middle layer; 3. Outer layer; 21. Protective layer one; 22. Protective layer two; 23. Reinforcing component; 231. Support bar; 232. Cavity; 233. PCM microcapsule coating; 234. Pressing part; 24. Receiving cavity. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings. 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.

[0030] I. Materials

[0031] II. Methods

[0032] 1. In this application, the inner layer 1 is commercially available pure cotton fabric, and the middle layer 2 is commercially available 260T spring spun fabric;

[0033] 2. The PCM microcapsule coating used in this application was purchased from NatureSeason PCM 32 by Shanghai Xinya New Material Technology Co., Ltd.

[0034] Unless otherwise specified, the methods used in this embodiment are all conventional methods known to those skilled in the art, and the reagents and materials used are all commercially available products.

[0035] To investigate the effects of different structural designs of the outer layer (3) on the tear resistance, warmth retention, and down-proof properties of down jacket thermal fabrics containing PCM microcapsules, the following technical solutions of Examples 1-2 and Comparative Examples 1-2 were designed, as detailed below:

[0036] Example 1

[0037] like Figure 1-2 As shown, a down jacket thermal insulation fabric containing PCM microcapsules includes an inner layer 1, a middle layer 2 and an outer layer 3 connected in sequence.

[0038] The intermediate layer 2 includes a first protective layer 21 and a second protective layer 22 respectively disposed on opposite sides of the inner layer 1 and the outer layer 3. The first protective layer 21 and the second protective layer 22 are both continuous alternating concave and convex structures. The concave positions of the first protective layer 21 and the second protective layer 22 are arranged correspondingly to form a receiving cavity 24. Each receiving cavity 24 is provided with a reinforcing member 23.

[0039] The reinforcement 23 includes a support bar 231, a cavity 232 formed inside the support bar 231, and a PCM microcapsule coating 233 disposed inside the cavity 232 and on the outer wall of the support bar 231.

[0040] Preferably, the middle of both the upper and lower surfaces of the support bar 231 is recessed to form a recessed portion.

[0041] Preferably, the first protective layer 21, the second protective layer 22, and the support strip 231 are all made of polyamide or polypropylene.

[0042] A method for producing a down jacket thermal insulation fabric containing PCM microcapsules, the specific steps of which are as follows:

[0043] Step 1: Extruding protective layer 1 21 and protective layer 22 in one piece using a mold on inner layer 1 and outer layer 3, and extruding support strip 231 with internal cavity 232 in one piece using a mold, wherein protective layer 1 21 and protective layer 22 are both continuous alternating concave and convex structures.

[0044] Step 2: Coat the outer wall of the support strip 231 with PCM microcapsule coating, pour the PCM microcapsule coating into the cavity 232, and after leveling and drying, the reinforcement 23 is obtained.

[0045] The coating amount on the outer wall of the support strip 231 is 145 g / m. 2 The filling volume inside the cavity 232 is 125g / m³. 2 ;

[0046] Step 3: Place the inner layer 1 and the outer layer 3 with the protective layer 1 21 and the protective layer 22 facing each other, wherein the recessed positions of the protective layer 1 21 and the protective layer 22 are placed facing each other to form a receiving cavity 24, and the protruding positions of the protective layer 1 21 and the protective layer 22 are placed facing each other, and the reinforcement 23 prepared in step 2 is placed inside each receiving cavity 24.

[0047] Step 4: After hot pressing the inner layer 1, protective layer 1 21, reinforcement 23, protective layer 22 and outer layer 3 placed in step 3, the down jacket thermal insulation fabric containing PCM microcapsules is obtained. The hot pressing positions are the raised positions of protective layer 1 21 and protective layer 22.

[0048] The hot pressing process was performed at a temperature of 152±3℃, a pressure of 6MPa, and was repeated 4 times, with each hot pressing session lasting 3 minutes.

[0049] Example 2

[0050] like Figure 3-6 As shown, in this embodiment, the difference from Embodiment 1 is that, in this embodiment, the two ends of the support strip 231 extend to both sides to form pressing portions 234, and the pressing portions 234 extend to the middle of the corresponding protrusions of the protective layer 1 21 and the protective layer 22 and are hot-pressed and bonded; that is, in Embodiment 1, the two ends of the support strip 231 did not extend to both sides to form pressing portions 234.

[0051] A method for producing a down jacket thermal insulation fabric containing PCM microcapsules, the specific steps of which are as follows:

[0052] Step 1: Protective layer 1 21 and protective layer 22 are integrally extruded on inner layer 1 and outer layer 3 using a mold. Support strip 231 with internal cavity 232 is integrally extruded using a mold. Protective layer 1 21 and protective layer 22 are both continuous alternating concave and convex structures. Pressing parts 234 are also integrally formed on both sides of the support strip 231.

[0053] Step 2: Coat the outer wall of the support strip 231 with PCM microcapsule coating, pour the PCM microcapsule coating into the cavity 232, and after leveling and drying, the reinforcement 23 is obtained.

[0054] Step 3: Place the inner layer 1 and the outer layer 3 with the protective layer 1 21 and the protective layer 22 facing each other, wherein the recessed positions of the protective layer 1 21 and the protective layer 22 are placed facing each other to form a receiving cavity 24, and the protruding positions of the protective layer 1 21 and the protective layer 22 are placed facing each other. Place the reinforcement 23 prepared in step 2 inside each receiving cavity 24, and place the pressing part 234 on two adjacent support bars 231 in the middle of the protruding positions of the protective layer 1 21 and the protective layer 22.

[0055] Step 4: After hot pressing the inner layer 1, protective layer 1 21, reinforcement 23, protective layer 22 and outer layer 3 placed in step 3, the down jacket thermal insulation fabric containing PCM microcapsules is obtained. The hot pressing positions are the raised positions of protective layer 1 21 and protective layer 22.

[0056] Everything else is consistent with Example 1.

[0057] Comparative Example 1

[0058] In this comparative example, the difference from Example 1 is that, in this example, the cavity 232 is not filled with PCM microcapsule coating, and the coating amount on the outer wall of the support strip 231 is 145 g / m². 2 Add 125g / m 2 That is, 270g / m 2 That is, the PCM microcapsule coating 233 is only provided on the outer wall of the support strip 231;

[0059] Everything else is consistent with Example 1.

[0060] Comparative Example 2

[0061] In this comparative example, the difference from Example 2 is that, in this example, the cavity 232 is not filled with PCM microcapsule coating, and the coating amount on the outer wall of the support strip 231 is 145 g / m². 2 Plus 125g / m 2 That is, 270g / m 2 That is, PCM microcapsule coating 233 is only provided on the outer wall of the support strip 231.

[0062] Comparative Example 3

[0063] In this comparative example, the difference from Example 2 is that, in this example, there is no reinforcement member 23, and the PCM microcapsule coating is applied to the inner walls of the recessed positions of protective layer one 21 and protective layer two 22. The coating amount on the inner walls of the recessed positions of protective layer one 21 and protective layer two 22 is 145 g / m². 2 Plus 125g / m 2 That is, 270g / m 2 PCM microcapsule coating 233 is provided on the inner wall of the recessed position of protective layer 1 21 and protective layer 22.

[0064] III. Performance Testing Experiment

[0065] It should be noted that the tear resistance test sample fabric, down-proof test sample fabric, and warmth retention test sample fabric of Examples 1-2 and Comparative Examples 1-2 were all heat-pressed to lock the inner layer 1, middle layer 2, and outer layer 3 (heat-pressing temperature was 165℃±3℃, heat-pressing pressure was 7MPa, heat-pressing was performed 3 times, and each heat-pressing time was 2min) so that the front and rear ends of the receiving cavity 24 and the cavity 232 were kept sealed.

[0066] Tear resistance test: Experimental equipment: Q800 dynamic mechanical analyzer (DMA, TA Instruments, Inc., USA). Experimental method: Take the three-layer fabric with concave and convex textures of Examples 1-2 and Comparative Examples 1-2 as samples. The sample size is a strip of 30×10mm. The sample is placed in a tensile fixture, with one end fixed and the other end movable with the fixture. The temperature is 20℃±2℃, the frequency is set to 1Hz, and the applied stress is gradually increased from 0 at a rate of 3MPa / s. The strain change of the sample is recorded until the sample breaks. The stress at the fracture point is taken as the tensile strength of the sample.

[0067] The tear resistance test samples were: unwashed down jacket thermal fabric containing PCM microcapsules; down jacket thermal fabric containing PCM microcapsules washed 30 times (washed 30 times in a drum washing machine at 1200 rpm for 22 minutes each time); and down jacket thermal fabric containing PCM microcapsules washed 60 times (washed 60 times in a drum washing machine at 1200 rpm for 22 minutes each time).

[0068] Table 1. Record of Tear Resistance Test Data

[0069]

[0070] Experimental conclusion: As can be seen from the data of Example 1 and Comparative Example 3 in Table 1, setting the reinforcement 23 inside the receiving cavity 24 between the first protective layer 21 and the second protective layer 22 can greatly improve the tear resistance of the fabric.

[0071] As can be seen from the data of Examples 1 and 2 in Table 1, when the two ends of the support strip 231 extend to both sides to form pressing parts 234, and the pressing parts 234 extend to the middle of the corresponding protrusions of the protective layer 1 21 and the protective layer 22, the tear resistance of the fabric can be further improved.

[0072] As can be seen from the data in Examples 1-2 and Comparative Examples 1-2 in Table 1, the presence of PCM microcapsule coating 233 on the outer wall of support strip 231 and on the inside of cavity 232 and the outer wall of support strip 231 respectively has almost no effect on the tear resistance of the fabric.

[0073] Downproof performance: The downproof performance of the fabric is tested according to the national standard GB / T12705.2-2009 "Textiles - Test Method for Downproofness of Fabrics - Part 2: Rotating Box Method". When the number of down threads in the fabric is >15, the downproof performance is poor; when 5 < down thread count ≤15, it has downproof performance; when the number of down threads ≤5, it has good downproof performance.

[0074] The thermal insulation performance test was conducted according to the test method of GB / T35762-2017 "Test Method for Heat Transfer Properties of Textiles - Plate Method". The experimental data were calculated and recorded. It should be noted that the temperature of the test plate, protective plate and base plate was set to 32℃±0.2℃.

[0075] Table 2. Test Data Recording Table for Downproof and Warmth Retention Performance

[0076]

[0077] Experimental conclusion: As can be seen from the data in Tables 1 and 2, the down jacket thermal fabric containing PCM microcapsules in Example 2 has the best tear resistance, warmth retention and down-proof properties, and Example 2 is the best example.

[0078] According to the data comparison of Example 1 and Comparative Example 3 in Table 2, it can be seen that setting the reinforcement 23 inside the cavity 24 between the first protective layer 21 and the second protective layer 22 can greatly improve the warmth and down-proof properties of the fabric.

[0079] According to the data comparison of Embodiment 1 and Embodiment 2 in Table 2, it can be seen that when the two ends of the support strip 231 extend to both sides to form a pressing part 234, and the pressing part 234 extends to the middle of the corresponding protrusions of the protective layer 1 21 and the protective layer 22, it can further improve the warmth and down-proof properties of the fabric.

[0080] According to the data in Table 2 of Example 1 and Comparative Example 1, as well as Example 2 and Comparative Example 2, it can be seen that injecting PCM microcapsule coating into the cavity 232 and allowing it to flow and adhere to the inner wall of the cavity 232 is more durable than directly coating the PCM microcapsule coating on the surface of the support strip 231. This makes it less likely to fall off after multiple washes and maintains better durability, thus enabling the fabric to achieve a long-lasting warmth retention effect.

[0081] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively 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 modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A down jacket thermal insulation fabric containing PCM microcapsules, characterized in that: It includes an inner layer (1), a middle layer (2) and an outer layer (3) connected in sequence; The intermediate layer (2) includes a protective layer one (21) and a protective layer two (22) respectively disposed on opposite sides of the inner layer (1) and the outer layer (3). The protective layer one (21) and the protective layer two (22) are both continuous alternating concave and convex structures. The concave positions of the protective layer one (21) and the protective layer two (22) are arranged correspondingly to form a receiving cavity (24). Each receiving cavity (24) is provided with a reinforcing member (23). The reinforcement (23) includes a support bar (231), a cavity (232) opened inside the support bar (231), and a PCM microcapsule coating (233) disposed inside the cavity (232) and on the outer wall of the support bar (231). The support bar (231) has indented portions at the middle of both the upper and lower surfaces; The support strip (231) extends to both sides to form a pressing part (234), and the pressing part (234) extends to the middle of the corresponding protrusions of the first protective layer (21) and the second protective layer (22) and is hot-pressed and bonded.

2. The down jacket thermal fabric containing PCM microcapsules according to claim 1, characterized in that: The first protective layer (21), the second protective layer (22), and the support strip (231) are all made of polyamide or polypropylene.

3. A method for producing a down jacket thermal insulation fabric containing PCM microcapsules as described in any one of claims 1-2, characterized in that: The specific steps are as follows: Step 1: Extruding protective layer 1 (21) and protective layer 2 (22) in one piece using a mold on inner layer (1) and outer layer (3), and extruding support strip (231) with cavity (232) in one piece using a mold, wherein protective layer 1 (21) and protective layer 2 (22) are both continuous alternating concave and convex structures; Step 2: Coat the outer wall of the support strip (231) with PCM microcapsule coating, pour the PCM microcapsule coating into the cavity (232), level and dry to obtain the reinforcement (23). Step 3: Place the inner layer (1) and the outer layer (3) with the protective layer 1 (21) and the protective layer 2 (22) facing each other, wherein the recessed positions of the protective layer 1 (21) and the protective layer 2 (22) are placed facing each other to form a receiving cavity (24), and the protruding positions of the protective layer 1 (21) and the protective layer 2 (22) are placed facing each other, and place the reinforcement (23) prepared in step 2 inside each receiving cavity (24). Step 4: After hot pressing the inner layer (1), protective layer 1 (21), reinforcement (23), protective layer 2 (22), and outer layer (3) placed in step 3, a down jacket thermal fabric containing PCM microcapsules is obtained. The hot pressing position is the raised position of protective layer 1 (21) and protective layer 2 (22).

4. The production method according to claim 3, characterized in that: In step two, the coating amount on the outer wall of the support strip (231) is 140-150 g / m. 2 The injection volume inside the cavity (232) is 120-130 g / m³. 2 .

5. The production method according to claim 3, characterized in that: In step four, the hot pressing temperature is 145-160℃, the hot pressing pressure is 5-8MPa, the number of hot pressing cycles is 3-5, and the hot pressing time for each cycle is 2-3 minutes.

6. The production method according to claim 3, characterized in that: In step one, the support strip (231) is also integrally formed with pressing parts (234) on both sides; in step three, the pressing parts (234) on the two adjacent support strips (231) need to be placed in the middle of the protrusions of the first protective layer (21) and the second protective layer (22).

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