TW202348860A - Elastic thermal insulation composite material characterized by having good elasticity, thermal insulation property and durability - Google Patents

Abstract

This invention provides the elastic thermal insulation composite material with good elasticity, thermal insulation property and durability. The elastic thermal insulation composite material includes a thermal insulation cotton layer and a melt-blown layer; the thermal insulation cotton layer has the unit weight ranging from 20 gsm to 300 gsm and contains thermal insulation fibers; and the melt-blown layer is located on the thermal insulation cotton layer, has the unit weight ranging from 15 gsm to 100 gsm, and contains melt-blown elastic fibers. Wherein, one part of the thermal insulation fibers and one part of the melt-blown elastic fibers are linked with each other at the interface of the thermal insulation cotton layer and the melt-blown layer. The melt-blown elastic fiber is made of raw or recycled polymer elastic material selected from a group consisting of thermoplastic polyurethane, thermoplastic polyester elastomer, polytrimethylene terephthalate and combinations thereof, and the diameter of the melt-blown elastic fiber is 0.1 [mu]m to 35 [mu]m.

Description

Elastic insulation composite material

The present invention relates to an elastic thermal insulation composite material, in particular to an elastic thermal insulation composite material with good tensile elasticity, compression recovery rate, thermal insulation and durability.

Currently on the market for padded fabrics, the surface fabric and lining fabric are usually cut into pieces according to the pattern, and then a plurality of filling grids are sewn on each piece according to the predetermined pattern, and the filling grids are filled with both. Down is lightweight and has thermal insulation properties, and finally the down-filled pieces are assembled into the final product. However, there are doubts about humane issues in obtaining down. Therefore, a variety of man-made fibers have been developed to make insulation cotton materials to replace down and make filled fabrics.

Traditional thermal insulation cotton materials are often made of man-made fibers woven into a mesh, which are then stacked and thickened according to the required specifications. This type of thermal insulation cotton material can be sewn and cut together with the surface fabric and lining fabric for easy processing. However, the structure of thermal insulation cotton is relatively loose and lacks elasticity. Although glue or low-melting point fibers can be mixed to further solidify the shape, elastic thermal insulation cotton with a certain stretch elasticity can even be produced through the proportion of three-dimensional fibers or elastic fibers, but its The structural strength is still insufficient. Therefore, thermal insulation clothing or daily necessities made of traditional thermal insulation cotton materials have poor durability (such as dimensional stability) and are easily deformed after washing, and the fibers of the thermal insulation cotton materials may come from the gaps and gaps in the surface and lining fabrics. The hair comes out of the sewing needle holes (this phenomenon is commonly known as hair loss). Therefore, after long-term use, the fiber content of the insulation cotton filled between the surface fabric and the lining fabric may gradually decrease.

In addition, the thermal insulation characteristics of traditional thermal insulation cotton materials are related to thickness. To achieve a certain thermal insulation value, they often have a certain thickness, which is relatively heavy and is not conducive to storage, folding and carrying. Looking at the products currently on the market, some thermal insulation cotton materials can be made thin and light, some have stretch elasticity, and some have high thermal insulation value characteristics, etc. However, it is difficult to combine all the advantages in a single product.

It can be seen from the above that filled fabrics made of traditional thermal insulation cotton materials generally do not have stretch elasticity and have poor recovery effects. If they want to have high thermal insulation value at the same time, the fabric will be thicker and less durable. Therefore, there is a real need to develop an elastic insulation composite material that is light and thin and has good tensile elasticity, insulation effect and durability to improve the shortcomings of currently commercially available insulation cotton materials and to produce thinner, lighter, more portable, and more durable insulation materials. Washable padded fabric.

In view of the above-mentioned shortcomings of the prior art, one of the purposes of the present invention is to provide an elastic thermal insulation composite material that has good thermal insulation properties and can reduce the weight and thickness of the filled fabric to achieve a lightweight effect; and has good thermal insulation properties. Excellent tensile elasticity and compression recovery rate, convenient for folding and storage: In addition, it has excellent durability and friction resistance, and is not easy to lint or shrink after washing.

In order to achieve the above purpose, the present invention provides an elastic thermal insulation composite material, which includes: an insulation cotton layer, the unit weight of which is 20 grams per square meter (gsm) to 300 gsm, and which includes an insulation cotton layer. Fiber; and a melt-blown layer, located on the thermal insulation cotton layer, with a unit weight of 15 gsm to 100 gsm, and containing a melt-blown elastic fiber; wherein at the interface between the thermal insulation cotton layer and the melt-blown layer, A part of the insulation fiber and a part of the melt-blown elastic fiber are connected to each other. The material of the melt-blown elastic fiber is a virgin or recycled polymer elastic material. The polymer elastic material is selected from thermoplastic polyurethane (TPU). , a group consisting of thermoplastic polyester elastomer (TPEE), polytrimethylene terephthalate (PTT) and combinations thereof, and the diameter of the melt-blown elastic fiber is 0.1 micrometer , μm) to 35 μm.

In some specific embodiments, the unit weight of the thermal insulation cotton layer is 20 gsm to 300 gsm, or 25 gsm to 250 gsm, or 30 gsm to 200 gsm, or 35 gsm to 150 gsm, or 40 gsm to 120 gsm, or 45 gsm to 100 gsm, or 50 gsm to 80 gsm, or 55 gsm to 60 gsm.

In some specific embodiments, the material of the insulation fiber is a virgin or recycled fiber material, and the fiber material is selected from polyethylene terephthalate (PET), polypropylene terephthalate A group consisting of polytrimethylene terephthalate (PTT) and its combinations.

In some specific embodiments, the thermal insulation cotton layer is a fiber laminate formed by first combing the thermal insulation fibers through a carding machine and cross-laying them with a forming machine, and then interlacing the fiber laminates through needle rolling, spunlace, etc. , a structure formed by resin spraying, and/or by oven heat treatment of low melting point fibers in the insulation fiber material itself.

In some embodiments, the polymer elastic material includes a thermoplastic polyurethane, and the melting point of the thermoplastic polyurethane ranges from 150°C to 190°C, or from 160°C to 180°C, or from 170°C to 180°C. C. In some embodiments, the polymer elastic material includes a thermoplastic polyurethane, and the melting point of the thermoplastic polyester elastomer ranges from 210°C to 240°C, or from 220°C to 230°C. In some embodiments, the polymer elastic material includes a thermoplastic polyurethane, and the melting point of the polytrimethylene terephthalate ranges from 245°C to 265°C, or from 255°C to 260°C.

In some specific embodiments, the melt-blown temperature of the polymer elastic material is above 150°C, or above 160°C, or above 170°C, or above 180°C, or above 190°C, Or above 200°C, or above 210°C, or above 220°C, or above 230°C, or above 240°C, or above 250°C, or above 260°C, or is above 265°C.

In some specific embodiments, the unit weight of the meltblown layer is 15 gsm to 100 gsm, or 20 gsm to 90 gsm, or 25 gsm to 80 gsm, or 30 gsm to 70 gsm, or 35 gsm to 60 gsm, or 40 gsm to 55 gsm, or 45 gsm to 50 gsm.

In some specific embodiments, the melt-blown elastic fiber is obtained by melt-spraying the material of the melt-blown elastic fiber through an extruder equipped with a melt-blown die, and the insulation cotton layer is transported to the melt-blown elastic fiber. Under the spray die, the melt-blown elastic fiber is formed on the insulation cotton layer to form the melt-blown layer; therefore, at the interface between the insulation cotton layer and the melt-blown layer, a part of the melt-blown elastic fiber Will be interconnected with part of the insulation fiber. In some embodiments, a portion of the melt-blown elastic fiber and a portion of the insulation fiber are adhered to each other by contacting the melt-blown elastic fiber with the insulation fiber after melt-blown.

In some specific embodiments, the diameter of the melt-blown elastic fiber is 0.1 μm to 35 μm, or 0.2 μm to 30 μm, or 0.5 μm to 25 μm, or 1 μm to 20 μm, or 1.5 μm to 25 μm, or 2 μm to 20 μm, or 2.5 μm to 15 μm, or 3 μm to 10 μm, or 3.5 μm to 5 μm.

In the description of this case, the word "virgin" means that the material has not been made into any products before and is a raw material. In the description of this case, the word "recycled" means that the material is the scraps of industrially produced products or the material obtained through resource recycling, and is not the original material. Taking the most common recycled polyester material as an example, there are currently two main sources of recycled polyester materials that can be made into fibers. One is pre-consumer and post-consumer polyester textiles; The other type is post-consumer PET bottles. This type of polyester material is recycled and made into environmentally friendly recycled fiber materials through physical or chemical methods.

In some specific embodiments, the elastic insulation composite material in this case contains a recycled component content of more than 20% (≥20%), which complies with GRS certification standards. In some specific embodiments, the elastic insulation composite material of this case contains a recycled component content of more than 30% (≥30%), or more than 35% (≥35%).

In some specific embodiments, the fineness of the thermal insulation fiber is 0.8 Denier (D) to 15 D, or 1.0 D to 10 D, or 1.2 D to 8 D, or 1.4 D to 6 D, or 1.6 D to 4 D, or 1.8 D to 3 D, or 2.0 D to 2.5 D. In some specific embodiments, the diameter of the insulation fiber is 8 μm to 150 μm, or 10 μm to 100 μm, or 12 μm to 80 μm, or 14 μm to 60 μm, or 16 μm to 40 μm, or 18 μm. to 30 μm, or 20 μm to 25 μm.

In some specific embodiments, the thermal insulation cotton layer may simultaneously contain thermal insulation fibers of different finenesses. In some specific embodiments, the insulation fibers of different finenesses may be the same material or different materials.

In some specific embodiments, the thermal insulation cotton layer further includes glue, low melting point fiber, or a combination thereof.

In some embodiments, the material of the low melting point fiber is a bicomponent fiber. The material of the bicomponent fiber can be a virgin or recycled material, including polyethylene (PE), polypropylene, and polyparaphenylene. Ethylene dicarboxylate, polyethylene terephthalate copolymer (PET copolymer, coPET) or other similar polymers. In some embodiments, the bicomponent fiber material includes two materials selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, and polyethylene terephthalate copolymer (PET copolymer, coPET). and other similar polymers. In some specific embodiments, the bicomponent fiber is polyethylene/polyethylene terephthalate (PE/PET), polyethylene terephthalate/polyethylene terephthalate copolymer ( PET/coPET), polyethylene/polypropylene (PE/PP), and similar polymer combinations. In some specific embodiments, the polyethylene terephthalate copolymer is a copolyester of PET and dicarboxylic acid, and the dicarboxylic acid can be selected from aliphatic dicarboxylic acid and aromatic dicarboxylic acid; wherein the The aliphatic dicarboxylic acid can be oxalic acid, malonic acid, succinic acid, adipic acid, etc.; the aromatic dicarboxylic acid can be isophthalic acid, sulfoisophthalic acid, etc.

In some specific embodiments, the melting point of the low-melting fiber material ranges from 110°C to 170°C, or from 125°C to 160°C, or from 140°C to 150°C.

In some specific embodiments, the material of the glue is water-based acrylic resin or water-based polyurethane resin. In some specific embodiments, the solid content of the water-based acrylic resin or water-based polyurethane resin is 30% to 50%.

In some specific embodiments, the thickness of the elastic thermal insulation composite material is 0.40 centimeter (cm) to 2.8 cm, or 0.60 cm to 2.6 cm, or 0.80 cm to 2.4 cm, or 1.0 cm to 2.2 cm, or 1.2 cm to 2.0 cm, or 1.4 cm to 1.8 cm, or 1.4 cm to 1.6 cm.

In some specific embodiments, the thermal insulation value/thickness of the elastic thermal insulation composite material is above 1.50 CLO/cm (CLO/cm), or above 1.60 CLO/cm, or above 1.70 CLO/cm, or above 1.80 CLO/cm , or above 1.90 CLO/cm. The aforementioned insulation values are measured according to standard method ASTM D1518.

In some specific embodiments, after the elastic insulation composite material was tested according to the standard method ASTM D4770, the test result was level 5, indicating the best water washing resistance.

In some specific embodiments, after the elastic insulation composite material was tested according to the standard method ASTM D4770, the test result was level 5, showing that the lint loss after washing was minimal.

In some specific embodiments, after being washed 10 times, the elastic thermal insulation composite material has a longitudinal washing shrinkage of less than 1.5%, or less than 1.0%, or less than 0.5%, or less than 0.2%. In some specific embodiments, after being washed 10 times, the elastic thermal insulation composite material has a transverse washing shrinkage of less than 2.5%, or less than 1.5%, or less than 0.5%, or less than 0.2%. The aforementioned washing shrinkage is measured according to the standard method ASTM D4770. In the present invention, the machine direction (MD) is the direction in which the thermal insulation composite material is rolled to roll mechanically, and the cross direction (CD) is the direction 90° perpendicular to the machine direction.

In some specific embodiments, the elastic thermal insulation composite material has a compression recovery rate of more than 80%, or more than 82%, or more than 85%. The aforementioned compression recovery rate is measured according to the standard method ASTM D6571-01.

In some specific embodiments, the longitudinal tensile elasticity of the elastic thermal insulation composite material is more than 15%, and the transverse tensile elasticity is more than 20%. The aforementioned tensile elasticity is measured according to standard method ASTM D2594.

In some specific embodiments, the friction resistance of the melt-blown layer of the elastic insulation composite material can reach more than 10,000 revolutions without damage. The friction resistance of the melt-blown layer of the elastic insulation composite material was measured by conducting the Martindale Abrasion Test according to the standard method ASTM D4966-98.

The elastic thermal insulation composite material of the present invention can be applied to various filled fabrics, such as clothing, scarves, quilts, etc.

The objectives, advantages and technical features of the present invention will become apparent through the following detailed description of the embodiments and the accompanying drawings.

Preparation of elastic thermal insulation composite materials of the present invention

As shown in Figures 1 and 2, the elastic thermal insulation composite material 1 of the present invention includes a thermal insulation cotton layer 10 and a melt-blown layer 20. The unit weight of the thermal insulation cotton layer 10 is 20 gsm to 300 gsm, and it includes a thermal insulation cotton layer 10. Fiber 11; the melt-blown layer 20 is located on the thermal insulation cotton layer 10, and its unit weight is 15 gsm to 100 gsm, and it contains a melt-blown elastic fiber 21; wherein the thermal insulation cotton layer 10 and the melt-blown layer At the interface 20, a part of the insulation fiber 11 and a part of the melt-blown elastic fiber 21 are connected to each other, and the material of the melt-blown elastic fiber 21 is a virgin or recycled polymer elastic material. The polymer elastic material is selected A group consisting of free thermoplastic polyurethane, thermoplastic polyester elastomer, polytrimethylene terephthalate and combinations thereof, and the diameter of the melt-blown elastic fiber is 0.1 μm to 35 μm. The hollow circles at both ends or in the middle of the melt-blown elastic fiber 21 represent the contact points between one melt-blown elastic fiber 21 and another melt-blown elastic fiber 21 or an insulation fiber 11 .

As shown in Figure 3A, part of the insulation fiber 11 and part of the melt-blown elastic fiber 21 located at the interface of the insulation cotton layer 10 and the melt-blown layer 20 are connected to each other, where the two ends or middle section of the melt-blown elastic fiber 21 The hollow circle represents the contact point between one melt-blown elastic fiber 21 and another melt-blown elastic fiber 21 or an insulation fiber 11 . As shown in FIG. 3B , part of the insulation fiber 11 and part of the melt-blown elastic fiber 21 located at the interface of the insulation cotton layer 10 and the melt-blown layer 20 are connected to each other and generate elasticity, wherein the melt-blown elastic fiber 21 The hollow circles at both ends represent the contact points between a melt-blown elastic fiber 21 and an insulation fiber 11 , and the wavy double arrows indicate the elastic direction of the melt-blown elastic fibers 21 between the insulation fibers 11 .

As shown in FIG. 4 , a melt-blown equipment 100 is used to prepare a melt-blown layer 20 on the thermal insulation cotton layer 10 using thermoplastic polyurethane. The melt-blown equipment 100 includes an extruder 110, a conveyor belt 120 and a negative pressure device 130; the extruder 110 includes a melt-blown die head 111; and the melt-blown die head 111 includes a raw material outlet 112 and two 113 hot air outlets.

Firstly, an insulation cotton layer 10 is provided with a unit area weight of 40 gsm. The insulation cotton layer 10 contains 30% to 35% of 3 D * 51 mm recycled PET fiber and 30% to 40% of 1.2 D * 38 mm. Recycled PET fiber, 10% to 15% 2 D * 51 mm low melting point fiber, and 15% to 25% water-based acrylic resin. The thermoplastic polyurethane is then melt-blown through an extruder 110 equipped with a melt-blown die 111, and the melt-blown temperature is above 150°C. The thermoplastic polyurethane is ejected from the raw material outlet 112 to obtain melt-blown elastic fiber 21 with a diameter of 0.1 μm to 15 μm. The thermal insulation cotton layer 10 is transported to the bottom of the melt-blown die head 111 through the conveyor belt 120 (the hollow solid arrow shows the direction of the conveyor belt), so that the melt-blown elastic fibers 21 of thermoplastic polyurethane are formed on the thermal insulation cotton layer 10, and on the With the help of the hot air from the two hot air outlets 113 and the negative pressure of the negative pressure device 130 (the hollow dotted arrow shows the negative pressure direction), a melt-blown layer 20 is formed above the insulation cotton layer 10, in which a part of the melt-blown elastic fiber 21 and the thermal insulation fiber 11 located on a part of the surface of the thermal insulation cotton layer 10 are mutually adhered to each other, so that the melt-blown layer 20 and the thermal insulation cotton layer 10 are closely adhered to each other. After cooling and rolling, the elastic thermal insulation composite of the present invention is obtained. Material 1, wherein the meltblown layer 20 has a weight per unit area of 40 gsm.

Characteristics of the elastic thermal insulation composite material of the present invention

The elastic thermal insulation composite material of the present invention is used as Example 1, in which the unit area weight of the insulation cotton layer is 40 gsm, the unit area weight of the melt-blown layer is 40 gsm, and the total unit area weight is 80 gsm. The insulation cotton made of the aforementioned insulation cotton layer but with a unit area weight of 80 gsm was used as Comparative Example 1, and the insulation cotton of the same material but with a unit area weight of 40 gsm was used as Comparative Example 2.

In addition, elastic insulation cotton was used for comparison. The elastic insulation cotton used contains 66% to 54% 3 D * 51 mm recycled PET fiber, 14% to 16% 2 D * 51 mm recycled PET fiber, and 20% to 30% water-based acrylic resin . Elastic insulation cotton with a weight per unit area of 80 gsm and 40 gsm was used as Comparative Examples 3 and 4 respectively.

According to the following standard methods, various properties of Example 1 and Comparative Examples 1 to 4 were tested. 1. Weight per unit area: Tested according to standard method ASTM D3776. 2. Thickness: Tested according to Invista Method. 3. Insulation value: Tested according to the standard method ASTM D1518, the value obtained is the CLO value, and the unit is CLO. 4. Washing resistance: Tested according to standard method ASTM D4770. The test results are divided into 5 levels, among which level 5 (Level 5) shows the best washability. 5. Flint loss after washing: Tested according to standard method ASTM D4770. The test results are divided into 5 levels, of which level 5 shows the least lint after washing. 6. Washing shrinkage: tested according to standard method ASTM D4770. 7. Compression recovery rate: Tested according to standard method ASTM D6571-01. 8. Resilience: Tested according to standard method ASTM D2594. 9. Friction resistance: The Martindale abrasion resistance test is performed according to the standard method ASTM D4966-98. The membrane material is judged to have excellent friction resistance when there is no damage after more than 5,000 revolutions of testing.

The above test results are listed in Table 1 below.

Table 1 Example 1 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Material Meltblown layer thermal insulation cotton thermal insulation cotton Elastic insulation cotton Elastic insulation cotton insulation cotton layer Total unit area weight (gsm) 80 80 40 80 40 Thickness(cm) 0.65 1.38 0.86 1.66 0.79 Thermal insulation value (CLO) 1.27 1.94 0.98 1.24 0.63 Insulation value/thickness (CLO/cm) 1.95 1.4 1.14 0.75 0.79 Washability Wash 5 times Level 5 Level 4 Level 4 Level 4 Level 4 Wash 10 times Level 5 Level 4 Level 4 Level 4 Level 4 Hair loss (washed 3 times) Level 5 Level 5 Level 5 Level 5 Level 5 Washing shrinkage (%) direction MD CD MD CD MD CD MD CD MD CD Wash 5 times 0 0 2 3 3 4 11 14 12 13 Wash 10 times 0 0 2 3 3 4 13 14.8 14 twenty one Compression recovery rate (%) 85 76 69 75 68.9 Elasticity(%) direction MD CD MD CD MD CD MD CD MD CD numerical value 20 30 0 0 0 0 7 15 10 25 Friction resistance ＞10000 revolutions without damage (melt blown layer) N/A N/A N/A N/A

The elastic thermal insulation composite material of Example 1 has a higher thermal insulation value per unit thickness (insulation value/thickness). Therefore, for thermal insulation materials of the same thickness, the thermal insulation value of the elastic thermal insulation composite material of the present invention is significantly higher than that of traditional thermal insulation cotton. and elastic insulation cotton, so it can achieve the effect of making the filled fabric lighter and thinner. For the same material, a thinner material will have a lower thermal insulation value per unit thickness. Taking Example 1 and Comparative Example 3 as an example, under the same total unit area weight, after the melt-blown layer was added to Example 1, its unit thickness was reduced by about 60% compared to Comparative Example 3, but the thermal insulation value of the unit thickness It has been improved by about 2.6 times, achieving the effect of being light and warm.

After the water washing test, the water washing resistance of the elastic insulation composite material of Example 1 is the best level 5, it is not easy to lint, and the size will not become smaller due to multiple water washings. It is more durable and has better durability. Traditional thermal insulation cotton and elastic thermal insulation cotton are slightly less resistant to washing, but their washing shrinkage is significantly higher. In contrast, the elastic insulation composite material of Example 1 will not shrink even after being washed 10 times, making it easier to clean and maintain.

The compression recovery rate of the elastic thermal insulation composite material of Example 1 is as high as 85%, and the longitudinal and transverse elasticity is also better than that of traditional elastic thermal insulation cotton. Therefore, after being folded or compressed for storage, it is easier to return to its original shape, maintain its original fluffiness, and maintain its thermal insulation value after long-term use.

In addition, the Martindale abrasion resistance test showed that the melt-blown layer of the elastic insulation composite material of Example 1 has excellent friction resistance, making the elastic insulation composite material more durable in use.

It can be seen from the above that the elastic thermal insulation composite material of the present invention has good elasticity and thermal insulation properties. It has excellent durability, is not easy to lint or shrink after washing, and has good friction resistance, compression recovery rate and Flexibility, wider application level.

1: Elastic insulation composite material 10: Insulation cotton layer 11: Insulation fiber 20: Melt blown layer 21:Melt-blown elastic fiber 100: Melt blown equipment 110:Extruder 111: Meltblown die head 112:Export of raw materials 113:Hot air outlet 120: Conveyor belt 130: Negative pressure device

Figure 1 is a schematic diagram of the elastic thermal insulation composite material of the present invention. Figure 2 is an enlarged view of the interface between the thermal insulation cotton layer and the melt-blown layer in Figure 1. 3A is a schematic diagram of the interconnection of the insulation fibers and the melt-blown elastic fibers at the interface between the insulation cotton layer and the melt-blown layer in the elastic insulation composite material of the present invention. 3B is a schematic diagram showing that the insulation fibers and melt-blown elastic fibers at the interface between the insulation cotton layer and the melt-blown layer in the elastic insulation composite material of the present invention are interconnected and generate elasticity. Figure 4 is a schematic diagram of preparing the elastic thermal insulation composite material of the present invention through melt-blown equipment.

1: Elastic insulation composite material

10: Insulation cotton layer

20: Melt blown layer

Claims (10)

An elastic thermal insulation composite material containing: An insulation cotton layer with a unit weight of 20 gsm to 300 gsm and containing an insulation fiber; and A melt-blown layer, located on the thermal insulation cotton layer, has a unit weight of 15 gsm to 100 gsm and contains a melt-blown elastic fiber; Wherein, at the interface between the insulation cotton layer and the melt-blown layer, a part of the insulation fiber and a part of the melt-blown elastic fiber are connected to each other, and the material of the melt-blown elastic fiber is a virgin or recycled polymer elastic material. The polymer elastic material is selected from the group consisting of thermoplastic polyurethane, thermoplastic polyester elastomer, polytrimethylene terephthalate and combinations thereof, and the diameter of the melt-blown elastic fiber is 0.1 μm to 35 μm. The elastic thermal insulation composite material as described in claim 1, wherein the thermal insulation cotton layer includes an thermal insulation fiber, and the material of the thermal insulation fiber is a virgin or recycled fiber material, and the fiber material is selected from polyethylene terephthalate. ester, polytrimethylene terephthalate and their combinations. The elastic thermal insulation composite material according to claim 2, wherein the thermal insulation cotton layer further contains glue, low melting point fiber, or a combination thereof. The elastic thermal insulation composite material according to claim 3, wherein the melting point of the low melting point fiber is 110°C to 170°C. The elastic thermal insulation composite material according to claim 3, wherein the material of the glue is water-based acrylic resin or water-based polyurethane resin. As for the elastic thermal insulation composite material described in claim 1, in the polymer elastic material, the melting point of the thermoplastic polyurethane ranges from 150°C to 190°C; the melting point range of the thermoplastic polyester elastomer ranges from 210°C to 240°C. °C; and the melting point range of the polytrimethylene terephthalate is 245°C to 265°C. The elastic thermal insulation composite material as described in claim 1, wherein the thermal insulation value/thickness of the elastic thermal insulation composite material is more than 1.50 CLO/cm. The elastic thermal insulation composite material as described in claim 1, wherein the longitudinal washing shrinkage of the elastic thermal insulation composite material is less than 1.5%, and the transverse washing shrinkage of the elastic thermal insulation composite material is less than 2.5%. The elastic thermal insulation composite material as described in claim 1, wherein the compression recovery rate of the elastic thermal insulation composite material is more than 80%. The elastic thermal insulation composite material as described in claim 1, wherein the elasticity of the elastic thermal insulation composite material in the longitudinal direction is more than 15%, and the elasticity in the transverse direction is more than 20%.

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