An extremely cold thermal insulation material and its preparation method and application

Abstract

This invention belongs to the field of thermal insulation materials technology, and provides an extreme cold insulation material, its preparation method, and its application. The extreme cold insulation material of this invention includes a first fixing mesh, an insulation layer, and a second fixing mesh stacked sequentially; the insulation layer is formed by laying down wadding, which is formed by spinning wadding raw material including Aerosoft fibers. The extreme cold insulation material provided by this invention features an insulation layer made of wadding, wherein the wadding includes Aerosoft fibers. Aerosoft fibers possess excellent water repellency, lightweight insulation, far-infrared properties, high compression resilience, and high bulkiness. The excellent water repellency of Aerosoft fibers allows it to maintain its excellent lightweight insulation properties even in high-humidity environments when used as the insulation layer of a thermal insulation material, making it suitable for use in high-humidity environments and thus for extreme cold environments.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation materials technology, and in particular to an extreme cold insulation material, its preparation method, and its application. Background Technology

[0002] Currently, the filling material of high-end cold-weather clothing on the market is generally goose down. Although top-grade goose down has strong warmth retention, its performance drops sharply in high humidity environments, and its reliability is insufficient when dealing with extreme environments such as spaceflight, polar exploration, and winter outdoor operations. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide an extreme cold insulation material, its preparation method, and its application. The extreme cold insulation material provided by this invention still exhibits excellent thermal insulation properties in high humidity environments.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides an extreme cold insulation material, comprising a first fixing net, an insulation layer, and a second fixing net arranged in sequence; The insulation layer is made of wadding, which is made of wadding raw material including Aerosoft fiber through spinning.

[0005] Preferably, the wadding material further includes sheep wool, and the mass content of sheep wool in the wadding material is less than or equal to 50%.

[0006] Preferably, the weight of the insulation layer is 35~120 g / m². 2 .

[0007] Preferably, the extreme cold insulation material further includes a wool-silk composite layer and a third fixing mesh; the wool-silk composite layer is in contact with the second fixing mesh; the weight of the wool-silk composite layer is 35~120 g / m². 2 .

[0008] Preferably, the wool-silk composite layer is formed of a wool-silk blend material, which is formed by blending a wool-silk mixture, wherein the wool-silk mixture comprises the following components in weight percentage: 60-85% wool and 40-15% silk.

[0009] Preferably, the wool is Australian Merino wool, and the fiber fineness of the Australian Merino wool is 15~20μm; the silk is mulberry silk.

[0010] Preferably, the method for preparing the wool-silk mixture includes the following steps: opening the wool and silk separately to obtain opened wool and opened silk respectively; and mixing the opened wool and opened silk to obtain the wool-silk mixture.

[0011] Preferably, the extreme cold insulation material further includes an outer fabric and an inner fabric, wherein the outer fabric has a weight of 60~180 g / m². 2 The weight of the inner material is 60~120g / m³. 2 ; The outer fabric is in contact with the first fixing net.

[0012] This invention also provides a method for preparing the extreme cold insulation material described in the above technical solution, comprising the following steps: A layer of insulating material is formed by laying wadding sheets on the first fixed mesh. After covering the insulation layer with a second fixing net, the material is sewn together to obtain the extreme cold insulation material.

[0013] This invention also provides the application of the extreme cold insulation material described in the above technical solution or the extreme cold insulation material prepared by the above technical solution in the field of insulation.

[0014] This invention provides an extremely cold-weather insulation material.

[0015] The extreme cold insulation material provided by this invention features an insulation layer composed of wadding, wherein the wadding is spun from wadding raw materials including Aerosoft fibers. Aerosoft fibers possess excellent water repellency, lightweight insulation, far-infrared properties, high compression resilience, and high bulk. The excellent water repellency of Aerosoft fibers allows it to maintain its excellent lightweight insulation properties even in high-humidity environments, making it suitable for use in high-humidity environments and consequently, extremely cold environments. The high bulk of Aerosoft fibers allows them to be woven into wadding and laid as an insulation layer, with fixed air layers between the fibers forming a thermal barrier that prevents the penetration of external cold air, further enhancing its insulation properties. The far-infrared properties of Aerosoft fibers allow them to generate heat upon contact with far-infrared rays, further improving their insulation performance. The insulation layer formed by Aerosoft fibers has a dense structure that resists the penetration of cold winds and also provides structural support, maintaining the stiffness of the insulation material.

[0016] Furthermore, the wadding material also includes sheep wool, with the sheep wool content in the wadding material being less than or equal to 50%. Wool is naturally crimped and has a scaly layer on its surface, providing a fluffy framework that traps air to form an insulating layer. Silk is long, smooth, and has a triangular cross-section, filling the gaps between the wool fibers and enhancing structural density, fluffiness, and resilience. The crimp of the wool supports the three-dimensional space, while the silk fills the gaps, making the wool-silk composite layer more uniform and full, with strong resistance to compression and collapse; it is also lighter: the light weight of silk neutralizes the heaviness of wool; wool (moisture-absorbing and heat-generating) + silk (low thermal conductivity) form a closed loop of "moisture absorption-heat storage-buffering." When sweating during exercise, wool absorbs moisture and releases heat; when at rest, silk slows down heat loss. Adding sheep wool to the wadding material utilizes the natural crimp of sheep wool to enhance the elasticity and resilience of the blended layer, avoiding the problem of decreased fluffiness and clumping after long-term compression of the insulating layer formed by pure Aerosoft fibers. Meanwhile, sheep wool fills the gaps between Aerosoft fibers to enhance wind resistance, making the insulation material lighter and more durable.

[0017] Furthermore, the extreme cold insulation material also includes a wool-silk composite layer and a third fixing mesh; the wool-silk composite layer is in contact with the second fixing mesh; the weight of the wool-silk composite layer is 35~120 g / m². 2 In this invention, the inner wool and silk composite layer actively absorbs moisture and generates heat, and wicks away sweat, avoiding the stuffiness during wear and the coldness after resting, greatly improving the comfort of the wearer and giving the extreme cold insulation material dynamic comfort.

[0018] The extreme cold insulation material provided by this invention has the following advantages: (1) Absolute moisture resistance: The core insulation layer does not absorb moisture at all, which completely solves the problem of down jackets losing their warmth after getting wet. It is especially suitable for snowy environments, high humidity environments and long-term outdoor activities.

[0019] (2) Lightweight and durable: It can be made thinner and lighter than traditional clothing while achieving the same level of warmth. The material has stable properties, is resistant to compression and washing, and has a long service life. Attached Figure Description

[0020] Figure 1 This is a structural diagram of an extreme cold insulation material. Detailed Implementation

[0021] This invention provides an extreme cold insulation material, comprising a first fixing net, an insulation layer, and a second fixing net arranged in sequence; The insulation layer is made of wadding, which is made of wadding raw material including Aerosoft fiber through spinning.

[0022] Unless otherwise specified, the raw materials used in this invention are preferably commercially available products.

[0023] Figure 1 This is a structural diagram of an extreme cold insulation material. The following is a combination of... Figure 1 The extreme cold insulation material of the present invention is described in detail.

[0024] The extreme cold insulation material provided by this invention includes a first fixing net. In this invention, the weight of the first fixing net is preferably 5~50 g / m². 2 Specifically, the preferred value is 5g / m 2 10g / m 2 15g / m 2 20g / m 2 25g / m 2 30g / m 2 35g / m 2 40g / m 2 45g / m 2 Or 50g / m 2 In this invention, the material of the first fixing net preferably includes tufted yarn.

[0025] The extreme cold insulation material provided by this invention preferably further includes an outer fabric, which is in contact with the first fixing net and preferably located on the outside of the first fixing net. In this invention, the weight of the outer fabric is preferably 60~180 g / m². 2 Specifically, the preferred value is 60g / m 2 62g / m 2 70g / m 2 80g / m 2 90g / m 2 100g / m 2 110g / m 2 120g / m 2 125g / m 2 130g / m 2 135g / m 2 140g / m 2 145g / m 2 150g / m 2 155g / m 2 160g / m 2 165g / m 2 170g / m 2 175g / m 2 Or 180g / m 2 In this invention, the outer fabric is preferably a Gore-Tex® functional fabric. This Gore-Tex® functional fabric offers advantages such as high strength, abrasion resistance, and tear resistance, while also providing waterproofing, windproofing, and breathability.

[0026] The extreme cold insulation material provided by this invention includes an insulation layer layered inside a first fixing net. In this invention, the insulation layer is composed of a wadding layer, which is spun from a wadding raw material including Aerosoft fibers; the wadding raw material preferably also includes sheep wool. In this invention, the mass content of sheep wool in the wadding raw material is preferably less than or equal to 50%, more preferably 5-50%, and specifically preferably 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, or 50%. In this invention, the weight of the insulation layer is preferably 35-120 g / m². 2 Specifically, the preferred value is 35g / m 2 40g / m 2 45g / m 2 50g / m 2 55g / m 2 60g / m 2 65g / m 2 70g / m 2 75g / m 2 80g / m 2 85g / m 2 90g / m 2 95g / m 2 100g / m 2 105g / m 2 110g / m 2 115g / m 2 Or 120g / m 2 .

[0027] The extreme cold insulation material provided by this invention includes a second fixing mesh layered inside the insulation layer. In this invention, the weight and material of the second fixing mesh are preferably the same as those of the first fixing mesh, and will not be described further here.

[0028] The extreme cold insulation material provided by this invention preferably further includes a wool-silk composite layer, which preferably contacts the second fixing net. In this invention, the weight of the wool-silk composite layer is preferably 35~120 g / m². 2 Specifically, the preferred value is 35g / m 2 40g / m 2 45g / m 2 50g / m 2 55g / m 2 60g / m 2 65g / m 2 70g / m 2 75g / m 2 80g / m 2 85g / m 290g / m 2 95g / m 2 100g / m 2 105g / m 2 110g / m 2 115g / m 2 Or 120g / m 2 In this invention, the wool-silk composite layer is preferably formed of a wool-silk blend material. The wool-silk blend material is preferably formed of a wool-silk mixture, which preferably comprises the following components by weight percentage: 60-85% wool and 40-15% silk. In this invention, the wool-silk mixture comprises 60-85% wool by weight percentage, specifically preferably 60%, 65%, 70%, 75%, 80%, or 85%. In this invention, the wool-silk mixture comprises 40-15% silk by weight percentage, specifically preferably 15%, 20%, 25%, 30%, 35%, or 40%. In this invention, the wool is preferably Australian Merino wool, and the fiber fineness of the Australian Merino wool is preferably 15-20 μm, specifically preferably 19.5 μm. In this invention, the silk is preferably mulberry silk. In this invention, the preferred method for preparing the wool-silk mixture includes: separately opening wool and silk to obtain opened wool and opened silk respectively; and mixing the opened wool and opened silk to obtain the wool-silk mixture. This invention does not specifically limit the opening and mixing operations and parameters; operations well-known to those skilled in the art can be used. In this invention, the wool-silk composite layer, as the inner layer, actively absorbs moisture and generates heat, and wicks away sweat, avoiding stuffiness during wear and coldness after rest, greatly improving comfort.

[0029] The extreme cold insulation material provided by this invention preferably further includes a third fixing mesh, which is in contact with the other side of the wool-silk composite layer. In this invention, the material and weight of the third fixing mesh are preferably the same as those of the first fixing mesh, and will not be described again here.

[0030] The extreme cold insulation material provided by the present invention preferably further includes an inner material layered inside the third fixing net. In the present invention, the weight of the inner material is preferably 60~120 g / m². 2 Specifically, the preferred value is 60g / m 2 70g / m 2 80g / m 2 85g / m 2 90g / m 2 95g / m 2 100g / m 2 105g / m 2110g / m 2 115g / m 2 Or 120g / m 2 In this invention, the material of the lining is preferably a woven fabric or a knitted fabric.

[0031] The extreme cold insulation material provided by this invention has the following functions: (1) Functional synergy and physical zoning: The insulation layer is mainly on the outside and is responsible for "static absolute defense"; the wool and silk composite layer is mainly on the inside and is responsible for "dynamic active adjustment". The two are physically separated, avoiding the discomfort that the insulation layer may cause when in contact with the skin, and also preventing the Aerosoft fiber from interfering with the function of the natural fiber. (2) All-round protection: This structure not only defends against extreme cold on the outside, but also manages moisture on the inside, realizing the concept of all-round protection from the inside out, which cannot be achieved by a single material or a simple mixture of materials. (3) Performance never decays: Since the core insulation layer (Aerosoft fiber) does not absorb moisture and is not afraid of compression (good resilience), and the wool and silk composite layer has a stable structure, the insulation performance of this insulation material will hardly decay throughout the entire product life cycle.

[0032] This invention also provides a method for preparing the extreme cold insulation material described in the above technical solution, comprising the following steps: A layer of insulating material is formed by laying wadding sheets on the first fixed mesh. After covering the insulation layer with a second fixing net, the material is sewn together to obtain the extreme cold insulation material.

[0033] This invention involves laying wadding on a first fixed mesh to form an insulating layer. The method of laying the wadding is not specifically limited, as long as an insulating layer of appropriate weight can be obtained. In this invention, when the extreme cold insulation material preferably also includes an outer fabric, before laying the wadding on the first fixed mesh to form the insulating layer, it is preferable to further include: stacking the outer fabric and the first fixed mesh. The method of stacking the outer fabric and the first fixed mesh is not specifically limited, and any operation well known to those skilled in the art can be used.

[0034] After forming the insulating layer, the present invention covers the insulating layer with a second fixing mesh and then sews it together to obtain the extreme cold insulation material. The present invention does not specifically limit the method of covering the second fixing mesh; any operation well-known to those skilled in the art can be used. The present invention does not specifically limit the sewing operation; any operation well-known to those skilled in the art can be used. In the present invention, when the extreme cold insulation material preferably also includes an inner material, after covering with the second fixing mesh, the present invention preferably also includes covering with an inner material. The present invention does not specifically limit the method of covering the inner material; any operation well-known to those skilled in the art can be used.

[0035] In this invention, when the extreme cold insulation material preferably further includes a wool-silk composite layer and a third fixing mesh, after covering with the second fixing mesh, the invention preferably further includes: laying the wool-silk composite layer; and covering the wool-silk composite layer with the third fixing mesh. In this invention, the wool-silk composite layer is preferably formed of a wool-silk blend material. This invention does not specifically limit the laying method of the wool-silk blend material, as long as a wool-silk composite layer of the appropriate weight is obtained. This invention does not specifically limit the covering method and sewing method of the third fixing mesh; operations well known to those skilled in the art can be used.

[0036] This invention also provides the application of the extreme cold insulation material described in the above technical solution or the extreme cold insulation material prepared by the above technical solution in the field of insulation.

[0037] The present invention does not impose specific limitations on the application of the extreme cold insulation material; those skilled in the art can make settings according to actual needs.

[0038] The following detailed description, in conjunction with embodiments, illustrates the extreme cold insulation material, its preparation method, and its application provided by the present invention. However, these descriptions should not be construed as limiting the scope of protection of the present invention.

[0039] Example 1 A method for preparing an extremely cold-weather insulated garment includes the following steps: Cut the outer fabric (Gore-Tex® functional fabric) and lining fabric (woven fabric, 80g / m²) according to the paper pattern. 2 ) and the insulation layer and wool-silk composite layer that serve as the filling core.

[0040] Layer the outer fabric with the first fixing net, then place the first fixing net (made of tulle, with a weight of 35g / m²) on top of the first fixing net. 2 An insulation layer (60g / m²) is formed by laying Aerostex® aerospace insulation material wadding (the wadding is formed by spinning Aerosoft fibers) on top. 2 ).

[0041] A second fixing net (made of yarn, 35g / m²) is placed on top of the insulation layer. 2 After that, a wool-silk blended material is laid to form a wool-silk composite layer (weight 60g / m²). 2 ); Among them, the wool and silk blended material is made by blending wool and silk mixture. The preparation method of wool and silk mixture is as follows: Australian Merino wool and mulberry silk with a fiber fineness of 18.5μm are opened separately to obtain opened wool and opened silk. The opened wool and opened silk are mixed at a mass ratio of 65:35 to form wool and silk mixture.

[0042] A third fixing mesh (made of yarn with a weight of 35g / m²) is covered on the wool-silk composite layer. 2 After being sewn together, the inner material is then sewn together to form an extremely cold-weather insulated garment.

[0043] Extreme cold-weather thermal clothing was cut into 50cm x 50cm pieces and sent for testing. The test was conducted according to the national standard GB / T 11048-2018, and the result was: a heat transfer coefficient of 2.81 W / (m²). 2 ·K), thermal resistance is 0.356m 2 K / W, Clo value 2.29, insulation rate 83.0%.

[0044] Example 2 The difference from Example 1 is that the insulation layer is made of wadding, wherein the wadding is made of wadding raw material formed by Aerosoft fiber and sheep wool through spinning, wherein the mass content of sheep wool in the wadding raw material is 10%, and the rest is the same as in Example 1.

[0045] Extreme cold-weather thermal clothing was cut into 50cm x 50cm pieces and sent for testing. The test was conducted according to the national standard GB / T 11048-2018, and the result was: heat transfer coefficient of 2.85 W / (m²). 2 ·K), thermal resistance is 0.351m 2 K / W, Clo value 2.26, insulation rate 82.9%.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An extremely cold-weather thermal material, characterized by, It includes a first fixing net, an insulation layer, and a second fixing net that are stacked in sequence; The insulation layer is made of wadding, which is made of wadding raw material including Aerosoft fiber through spinning.

2. The extreme cold weather thermal material of claim 1, wherein, The wadding material also includes sheep wool, and the mass content of sheep wool in the wadding material is less than or equal to 50%.

3. The extreme cold weather thermal material of claim 1 or 2, wherein, The gram weight of the warm-keeping layer is 35~120g / m 2 .

4. The extreme cold weather thermal management material of claim 1, wherein, The extreme cold keeping material further comprises a wool silk composite layer and a third fixing net; the wool silk composite layer is in contact with the second fixing net; the wool silk composite layer has a gram weight of 35-120 g / m 2 .

5. The extreme cold weather thermal material of claim 4, wherein, The wool-silk composite layer is formed of a wool-silk blend material, which is made of a wool-silk mixture comprising the following components by mass percentage: 60-85% wool and 40-15% silk.

6. The extreme cold weather thermal management material of claim 5, wherein, The wool is Australian Merino wool, and the fiber fineness of the Australian Merino wool is 15~20μm; the silk is mulberry silk.

7. The extreme cold weather thermal insulation material of claim 5, wherein, The preparation method of the wool-silk mixture includes the following steps: opening wool and silk separately to obtain opened wool and opened silk respectively; mixing the opened wool and opened silk to obtain the wool-silk mixture.

8. The extreme cold weather thermal management material of claim 1, wherein, The extremely cold-keeping material further comprises an outer fabric and an inner fabric; the outer fabric has a gram weight of 60-180 g / m 2 ; the inner fabric has a gram weight of 60-120 g / m 2 ; The outer fabric is in contact with the first fixing net.

9. The method of producing the extremely cold temperature keeping material according to any one of claims 1 to 8, characterized by, Includes the following steps: A layer of insulating material is formed by laying wadding on the first fixed mesh. After covering the insulation layer with a second fixing net, the material is sewn together to obtain the extreme cold insulation material.

10. The application of the extreme cold insulation material according to any one of claims 1 to 8 or the extreme cold insulation material prepared by the preparation method according to claim 9 in the field of thermal insulation.

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