A seamless waterproof and warm fabric of a down jacket and a preparation method thereof

Abstract

The present application relates to a kind of seamless waterproof thermal fabric of down jacket and its preparation method, including inner and outer layer fabric, the inner and outer layer fabric is separated by adhesive net adhesion and is divided into several cells, the cell is regular hexagon structure.The seamless waterproof thermal fabric of down jacket and its preparation method, warm coating is coated between the inner and outer layer fabric, it plays excellent warm-keeping effect at the same time, and by being coated with thermal coating on the surface of inner and outer layer fabric, thermal coating has good thermal effect, it is wrapped in the outside of hydrophobic group, forms modified waterproof coating, modified waterproof coating is filled in the pore of inner and outer layer fabric, can improve the waterproof property of inner and outer layer fabric in the tensile state, and in the process of drying, stretch relaxation is carried out multiple times, and cover multiple thermal coating, can improve the contact degree between each coating, while avoiding the consumption of hydrophobic group in the use process, greatly prolong the service life of fabric.

Description

Technical Field

[0001] This invention belongs to the field of down jacket fabric technology, specifically relating to a seamless waterproof and warm down jacket fabric and its preparation method. Background Technology

[0002] A down jacket is a large, rounded garment filled with down feathers. Down jackets typically contain more than half duck down, sometimes mixed with some fine feathers. The duck down is cleaned, sterilized at high temperatures, and then used to fill the garment. Down jackets offer the best warmth. They are primarily worn by people in cold regions and are also commonly used by polar expedition members.

[0003] Existing down jacket fabrics use a thermal coating made of porous carbon foam powder to enhance their insulation. While the thermal insulation performance of the coated down jacket fabric is indeed improved, the thermal insulation effect of the porous carbon foam powder in the thermal coating is generally poor, and it is difficult to adhere stably to the inside of the fabric, making it prone to damage during use. Therefore, it cannot extend the service life of the down jacket and the down jacket fabric. Summary of the Invention

[0004] The purpose of this invention is to provide a seamless waterproof and thermal fabric for down jackets and its preparation method in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A seamless waterproof and thermal fabric for down jackets includes inner and outer layers, which are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and a thermal insulation coating inside. The inner surfaces of the inner and outer layers are coated with a modified waterproof coating, which includes free hydrophobic groups and a thermal insulation coating distributed in the gaps between the inner and outer layers and wrapped around the free hydrophobic groups.

[0007] As a further optimization of the present invention, the preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0008] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 50-80℃ for 15-20 minutes to make the thermal insulation coating semi-solid. Stretch the inner and outer fabrics around the perimeter until the surface tension is 80-90N, allowing the semi-solid thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and adjust the surface tension of the inner and outer fabrics to 10-20N. Apply a second thermal insulation coating and repeatedly tighten and loosen the coating multiple times. While tightening and loosening, dry at 250-260℃ for 8-10 minutes to obtain the modified waterproof layer fabric.

[0009] S2: Take a piece of the above-mentioned modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh together in a hot press, use a temperature of 200-250℃ and a pressure of 70-90MPA, intermittently pressurize for 15-35 minutes, so that the adhesive mesh is hot-bonded to the inner surface of the base fabric and forms several cells on the inner surface of the base fabric.

[0010] S3: Using a coating machine, apply the thermal insulation coating multiple times to the inner surface of the base fabric until the thermal insulation coating is fully filled in the cells. Dry at 90-120℃ for 5-8 minutes to make the thermal insulation coating semi-solid, and obtain the composite base fabric.

[0011] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 100-150℃ and a pressure of 90-100MPA to continuously press for 30-35 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0012] As a further optimization of the present invention, in step S1, by mass percentage, the thermal insulation coating comprises 35%-50% liquid graphene, 30%-35% porous foam carbon powder and 20%-30% copper particles.

[0013] As a further optimization of the present invention, the heat-insulating coating is prepared by heating and electroplating porous foam carbon powder and copper particles, cooling them to room temperature, and then mixing them with liquid graphene.

[0014] As a further optimization of the present invention, in step S1, by mass percentage: the hydrophobic group comprises 10%-15% PAMAM, 30%-35% benzaldehyde compounds and 50%-60% ethanol.

[0015] As a further optimization of the present invention, the hydrophobic group is prepared by reacting PAMAM, benzaldehyde compounds and ethanol under nitrogen protection with stirring and reflux for 30-85 hours, followed by separation and purification.

[0016] As a further optimization of the present invention, in step S2, the adhesive mesh is a PU adhesive mesh.

[0017] As a further optimization of the present invention, in step S4, the thermal insulation coating comprises, by weight, 90-95 parts polyurethane, 2-3 parts thickener, 4-8 parts crosslinking agent, 4-5 parts foaming agent, 1.5-3 parts ammonia, 5-7 parts anti-sticking agent, 8-10 parts foam stabilizer, and 20-30 parts perlite beads.

[0018] As a further optimization of the present invention, the heat-insulating coating is prepared by heating and stirring polyurethane, thickener, crosslinking agent, foaming agent, ammonia, anti-sticking agent, and foam stabilizer, and then adding perlite beads.

[0019] The beneficial effects of this invention are as follows: While applying a thermal insulation coating between the inner and outer fabric layers to achieve excellent thermal insulation, the thermal insulation coating, which has a good thermal insulation effect, wraps around the hydrophobic groups to form a modified waterproof coating. This modified waterproof coating fills the pores of the inner and outer fabric layers, improving the waterproofness of the fabric under tension. Furthermore, the multiple stretching and relaxation processes during drying, along with the covering of multiple layers of thermal insulation coating, increase the contact between the various coatings and prevent the consumption of hydrophobic groups during use, thus greatly extending the fabric's service life. Attached Figure Description

[0020] Figure 1 This is a front-view axonometric structural diagram of the seamless waterproof and thermal fabric for down jackets of the present invention. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] This embodiment relates to a seamless waterproof and thermal fabric for down jackets, comprising inner and outer fabrics. The inner and outer fabrics are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and a thermal insulation coating inside. The inner surfaces of the inner and outer fabrics are coated with a modified waterproof coating, which includes free hydrophobic groups and a thermal insulation coating distributed in the gaps inside the inner and outer fabrics and wrapped around the free hydrophobic groups.

[0024] The preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0025] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 50°C for 15 minutes to make the thermal insulation coating semi-solid. Stretch the inner and outer fabrics around the perimeter until the surface tension is 80N, allowing the semi-solid thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and adjust the surface tension of the inner and outer fabrics to 10N. Apply a second thermal insulation coating and repeatedly tighten and loosen the coating multiple times. While tightening and loosening, dry at 250°C for 8 minutes to obtain the modified waterproof layer fabric.

[0026] The thermal insulation coating is made by heating and electroplating 30% porous foam carbon powder and 20% copper particles, cooling them to room temperature, and then mixing them with 50% liquid graphene.

[0027] The hydrophobic group was prepared by reacting 10% PAMAM, 30% benzaldehyde compound and 60% ethanol under nitrogen protection with stirring and reflux for 30 h, followed by separation and purification.

[0028] S2: Take a piece of the above modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh (PU adhesive mesh) together in a hot press, use a temperature of 200℃ and a pressure of 70MPA, intermittently press for 15 minutes, so that the adhesive mesh is hot-bonded to the inner surface of the base fabric and forms several cells on the inner surface of the base fabric.

[0029] S3: Using a coating machine, apply the thermal insulation coating multiple times to the inner surface of the base fabric until the thermal insulation coating is fully filled in the cells. Dry at 90℃ for 5 minutes to make the thermal insulation coating semi-solid, and obtain the composite base fabric.

[0030] The thermal insulation coating is prepared by heating and stirring 90 parts polyurethane, 2 parts thickener, 4 parts crosslinking agent, 4 parts foaming agent, 1.5 parts ammonia, 5 parts anti-sticking agent, and 8 parts foam stabilizer, and then adding 20 parts perlite beads.

[0031] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 100℃ and a pressure of 90MPA to continuously press for 30 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0032] Example 2

[0033] This embodiment relates to a seamless waterproof and thermal fabric for down jackets, comprising inner and outer fabrics. The inner and outer fabrics are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and a thermal insulation coating inside. The inner surfaces of the inner and outer fabrics are coated with a modified waterproof coating, which includes free hydrophobic groups and a thermal insulation coating distributed in the gaps inside the inner and outer fabrics and wrapped around the free hydrophobic groups.

[0034] The preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0035] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 65°C for 18 minutes to make the thermal insulation coating semi-solid. Stretch the inner and outer fabrics around the perimeter until the surface tension is 85N, allowing the semi-solid thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and adjust the surface tension of the inner and outer fabrics to 15N. Apply a second thermal insulation coating and repeatedly tighten and loosen the coating multiple times. While tightening and loosening, dry at 255°C for 9 minutes to obtain the modified waterproof layer fabric.

[0036] The thermal insulation coating is made by heating and electroplating 33% porous foam carbon powder and 22% copper particles, cooling them to room temperature, and then mixing them with 35% liquid graphene.

[0037] The hydrophobic group was prepared by reacting 13% PAMAM, 32% benzaldehyde compound and 55% ethanol under nitrogen protection with stirring and reflux for 65 h, followed by separation and purification.

[0038] S2: Take a piece of the above modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh (PU adhesive mesh) together in a hot press, use a temperature of 240℃ and a pressure of 80MPA, intermittently press for 20 minutes, so that the adhesive mesh is hot-bonded to the inner surface of the base fabric and forms several cells on the inner surface of the base fabric.

[0039] S3: Using a coating machine, apply the thermal insulation coating multiple times to the inner surface of the base fabric until the thermal insulation coating is fully filled in the cells. Dry at 100℃ for 7 minutes to make the thermal insulation coating semi-solid, and obtain the composite base fabric.

[0040] The thermal insulation coating is prepared by heating and stirring 93 parts polyurethane, 2.5 parts thickener, 6 parts crosslinking agent, 4.5 parts foaming agent, 2 parts ammonia, 6 parts anti-sticking agent, and 9 parts foam stabilizer, and then adding 25 parts perlite beads.

[0041] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 120℃ and a pressure of 95MPA to continuously press for 33 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0042] Example 3

[0043] This embodiment relates to a seamless waterproof and thermal fabric for down jackets, comprising inner and outer fabrics. The inner and outer fabrics are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and a thermal insulation coating inside. The inner surfaces of the inner and outer fabrics are coated with a modified waterproof coating, which includes free hydrophobic groups and a thermal insulation coating distributed in the gaps inside the inner and outer fabrics and wrapped around the free hydrophobic groups.

[0044] The preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0045] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 80℃ for 20 minutes to make the thermal insulation coating semi-solid. Stretch the inner and outer fabrics around the perimeter until the surface tension is 90N, allowing the semi-solid thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and adjust the surface tension of the inner and outer fabrics to 20N. Apply a second thermal insulation coating and repeatedly tighten and loosen the coating multiple times. While tightening and loosening, dry at 260℃ for 10 minutes to obtain the modified waterproof layer fabric.

[0046] The thermal insulation coating is made by heating and electroplating 35% porous foamed carbon powder and 30% copper particles, cooling them to room temperature, and then mixing them with 35% liquid graphene.

[0047] The hydrophobic group was prepared by reacting 15% PAMAM, 35% benzaldehyde compound and 60% ethanol under nitrogen protection with stirring and reflux for 85 h, followed by separation and purification.

[0048] S2: Take a piece of the above modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh (PU adhesive mesh) together in a hot press, use a temperature of 250℃ and a pressure of 90MPA, intermittently press for 35 minutes, so that the adhesive mesh is hot-bonded to the inner surface of the base fabric and forms several cells on the inner surface of the base fabric.

[0049] S3: Using a coating machine, apply the thermal insulation coating multiple times to the inner surface of the base fabric until the thermal insulation coating is fully filled in the cells. Dry at 120℃ for 8 minutes to make the thermal insulation coating semi-solid, and obtain the composite base fabric.

[0050] The thermal insulation coating is prepared by heating and stirring 95 parts polyurethane, 3 parts thickener, 8 parts crosslinking agent, 4-5 parts foaming agent, 3 parts ammonia, 7 parts anti-sticking agent, and 10 parts foam stabilizer, and then adding 30 parts perlite beads.

[0051] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 150℃ and a pressure of 100MPA to continuously press for 35 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0052] Comparative Example 1

[0053] This comparative example relates to a seamless waterproof and thermal fabric for a down jacket, comprising inner and outer layers of fabric. The inner and outer layers of fabric are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and an internal thermal insulation coating. The inner surfaces of the inner and outer layers of fabric are coated with a modified waterproof coating, which includes free hydrophobic groups and thermal insulation coatings distributed in the gaps within the inner and outer layers of fabric and wrapped around the free hydrophobic groups.

[0054] The preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0055] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 50°C for 15 minutes to allow the thermal insulation coating to fully solidify. Stretch the inner and outer fabrics around the perimeter until the surface tension is 80N, allowing the thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and adjust the surface tension of the inner and outer fabrics to 10N. Apply a second thermal insulation coating and repeatedly tighten and loosen the fabric multiple times. While tightening and loosening, dry at 250°C for 8 minutes to obtain the modified waterproof layer fabric.

[0056] The thermal insulation coating is made by heating and electroplating 30% porous foam carbon powder and 20% copper particles, cooling them to room temperature, and then mixing them with 50% liquid graphene.

[0057] The hydrophobic group was prepared by reacting 10% PAMAM, 30% benzaldehyde compound and 60% ethanol under nitrogen protection with stirring and reflux for 30 h, followed by separation and purification.

[0058] S2: Take a piece of the above modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh (PU adhesive mesh) together in a hot press, use a temperature of 200℃ and a pressure of 70MPA, intermittently press for 15 minutes, so that the adhesive mesh is hot-bonded to the inner surface of the base fabric and forms several cells on the inner surface of the base fabric.

[0059] S3: Using a coating machine, apply the thermal insulation coating multiple times to the inner surface of the base fabric until the thermal insulation coating is fully filled in the cells. Dry at 90℃ for 5 minutes to make the thermal insulation coating semi-solid, and obtain the composite base fabric.

[0060] The thermal insulation coating is prepared by heating and stirring 90 parts polyurethane, 2 parts thickener, 4 parts crosslinking agent, 4 parts foaming agent, 1.5 parts ammonia, 5 parts anti-sticking agent, and 8 parts foam stabilizer, and then adding 20 parts perlite beads.

[0061] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 100℃ and a pressure of 90MPA to continuously press for 30 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0062] Comparative Example 2

[0063] This comparative example relates to a seamless waterproof and thermal fabric for a down jacket, comprising inner and outer layers of fabric. The inner and outer layers of fabric are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and an internal thermal insulation coating. The inner surfaces of the inner and outer layers of fabric are coated with a modified waterproof coating, which includes free hydrophobic groups and thermal insulation coatings distributed in the gaps within the inner and outer layers of fabric and wrapped around the free hydrophobic groups.

[0064] The preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0065] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 50°C for 15 minutes to make the thermal insulation coating semi-solid. Stretch the inner and outer fabrics around the perimeter until the surface tension is 80N, allowing the semi-solid thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and completely loosen the inner and outer fabrics to adjust the surface tension to 0N. Apply a second thermal insulation coating and repeatedly tighten and loosen the fabrics multiple times. While tightening and loosening, dry at 250°C for 8 minutes to obtain the modified waterproof layer fabric.

[0066] The thermal insulation coating is made by heating and electroplating 30% porous foam carbon powder and 20% copper particles, cooling them to room temperature, and then mixing them with 50% liquid graphene.

[0067] The hydrophobic group was prepared by reacting 10% PAMAM, 30% benzaldehyde compound and 60% ethanol under nitrogen protection with stirring and reflux for 30 h, followed by separation and purification.

[0068] S2: Take a piece of the above modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh (PU adhesive mesh) together in a hot press, use a temperature of 200℃ and a pressure of 70MPA, intermittently press for 15 minutes, so that the adhesive mesh is hot-bonded to the inner surface of the base fabric and forms several cells on the inner surface of the base fabric.

[0069] S3: Using a coating machine, apply the thermal insulation coating multiple times to the inner surface of the base fabric until the thermal insulation coating is fully filled in the cells. Dry at 90℃ for 5 minutes to make the thermal insulation coating semi-solid, and obtain the composite base fabric.

[0070] The thermal insulation coating is prepared by heating and stirring 90 parts polyurethane, 2 parts thickener, 4 parts crosslinking agent, 4 parts foaming agent, 1.5 parts ammonia, 5 parts anti-sticking agent, and 8 parts foam stabilizer, and then adding 20 parts perlite beads.

[0071] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 100℃ and a pressure of 90MPA to continuously press for 30 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0072] Comparative Example 3

[0073] This comparative example relates to a seamless waterproof and thermal fabric for a down jacket, comprising inner and outer layers of fabric. The inner and outer layers of fabric are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and an internal thermal insulation coating. The inner surfaces of the inner and outer layers of fabric are coated with a modified waterproof coating, which includes free hydrophobic groups and thermal insulation coatings distributed in the gaps within the inner and outer layers of fabric and wrapped around the free hydrophobic groups.

[0074] The preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0075] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 50°C for 15 minutes to make the thermal insulation coating semi-solid. Stretch the inner and outer fabrics around the perimeter until the surface tension is 80N, allowing the semi-solid thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and adjust the surface tension of the inner and outer fabrics to 10N. Apply a second thermal insulation coating and repeatedly tighten and loosen the coating multiple times. While tightening and loosening, dry at 250°C for 8 minutes to obtain the modified waterproof layer fabric.

[0076] The thermal insulation coating is made by heating and electroplating 30% porous foam carbon powder and 20% copper particles, cooling them to room temperature, and then mixing them with 50% liquid graphene.

[0077] The hydrophobic group was prepared by reacting 10% PAMAM, 30% benzaldehyde compound and 60% ethanol under nitrogen protection with stirring and reflux for 30 h, followed by separation and purification.

[0078] S2: Take a piece of the above modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh (PU adhesive mesh) together in a hot press, use a temperature of 200℃ and a pressure of 70MPA, and apply continuous pressure for 15 minutes to heat-bond the adhesive mesh to the inner surface of the base fabric and form several cells on the inner surface of the base fabric.

[0079] S3: Using a coating machine, apply the thermal insulation coating multiple times to the inner surface of the base fabric until the thermal insulation coating is fully filled in the cells. Dry at 90℃ for 5 minutes to make the thermal insulation coating semi-solid, and obtain the composite base fabric.

[0080] The thermal insulation coating is prepared by heating and stirring 90 parts polyurethane, 2 parts thickener, 4 parts crosslinking agent, 4 parts foaming agent, 1.5 parts ammonia, 5 parts anti-sticking agent, and 8 parts foam stabilizer, and then adding 20 parts perlite beads.

[0081] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 100℃ and a pressure of 90MPA to continuously press for 30 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0082] Comparative Example 4

[0083] This comparative example relates to a seamless waterproof and thermal fabric for a down jacket, comprising inner and outer layers of fabric. The inner and outer layers of fabric are separated into several cell units by an adhesive mesh. Each cell unit has a regular hexagonal structure and an internal thermal insulation coating. The inner surfaces of the inner and outer layers of fabric are coated with a modified waterproof coating, which includes free hydrophobic groups and thermal insulation coatings distributed in the gaps within the inner and outer layers of fabric and wrapped around the free hydrophobic groups.

[0084] The preparation steps of a method for preparing a seamless waterproof and warm down jacket fabric include:

[0085] S1: Apply a thermal insulation coating to the inner surface of the inner and outer fabrics using a coating machine. Dry at 50°C for 15 minutes to make the thermal insulation coating semi-solid. Stretch the inner and outer fabrics around the perimeter until the surface tension is 80N, allowing the semi-solid thermal insulation coating to penetrate into the pores of the inner and outer fabrics. Coat with hydrophobic groups and adjust the surface tension of the inner and outer fabrics to 10N. Apply a second thermal insulation coating and repeatedly tighten and loosen the coating multiple times. While tightening and loosening, dry at 250°C for 8 minutes to obtain the modified waterproof layer fabric.

[0086] The thermal insulation coating is made by heating and electroplating 30% porous foam carbon powder and 20% copper particles, cooling them to room temperature, and then mixing them with 50% liquid graphene.

[0087] The hydrophobic group was prepared by reacting 10% PAMAM, 30% benzaldehyde compound and 60% ethanol under nitrogen protection with stirring and reflux for 30 h, followed by separation and purification.

[0088] S2: Take a piece of the above modified waterproof layer fabric as the base fabric, place the base fabric and the adhesive mesh (PU adhesive mesh) together in a hot press, use a temperature of 200℃ and a pressure of 70MPA, intermittently press for 15 minutes, so that the adhesive mesh is hot-bonded to the inner surface of the base fabric and forms several cells on the inner surface of the base fabric.

[0089] S3: Using a coating machine, apply a thermal insulation coating to the inner surface of the base fabric in one coat, and dry it at 90°C for 5 minutes to make the thermal insulation coating semi-solid, thus obtaining a composite base fabric.

[0090] The thermal insulation coating is prepared by heating and stirring 90 parts polyurethane, 2 parts thickener, 4 parts crosslinking agent, 4 parts foaming agent, 1.5 parts ammonia, 5 parts anti-sticking agent, and 8 parts foam stabilizer, and then adding 20 parts perlite beads.

[0091] S4: Take another piece of the above-mentioned modified waterproof layer fabric as the surface layer fabric, and place the composite base layer fabric and the surface layer fabric together in a hot press. Use a temperature of 100℃ and a pressure of 90MPA to continuously press for 30 minutes to obtain the seamless waterproof and thermal insulation fabric.

[0092] Waterproofing and heat retention performance were tested for Examples 1-3 and Comparative Examples 1-4, using 10cm samples. 2 The seamless waterproof and thermal down jacket fabric was used as the sample fabric. The fabric was sealed to the mouth of a beaker containing 100°C hot water using sealing tape. After the hot water cooled to 25°C, the permeation area (cm²) from the sample fabric was measured. 2 The waterproof performance of the seamless waterproof and thermal fabric of this down jacket was evaluated by measuring the time (in minutes) required for the fabric sample to cool to 25°C. The thermal insulation performance of the seamless waterproof and thermal fabric of this down jacket was evaluated by measuring the time (in minutes) required for the fabric sample to cool to 25°C. The test results are shown in the table below:

[0093]

[0094] As shown in the table above, the water droplet penetration area measured on the fabric samples in Examples 1-3 is much smaller than that measured on the fabric samples in Comparative Examples 1-4. Therefore, the waterproof performance of the fabric samples in Examples 1-3 is significantly better than that of the fabric samples in Comparative Examples 1-4. The time required for the fabric samples in Examples 1-3 to cool to 25°C is much longer than that required for the fabric samples in Comparative Examples 1-4 to cool to 25°C. Therefore, the heat retention performance of the fabric samples in Examples 1-3 is significantly better than that of the fabric samples in Comparative Examples 1-4.

[0095] The reason is that the thermal insulation coating has a good thermal insulation effect. It wraps around the outside of the hydrophobic group to form a modified waterproof coating. The modified waterproof coating fills the pores of the inner and outer fabrics, which can improve the waterproofness of the inner and outer fabrics under tension. During the drying process, it is stretched and relaxed multiple times and covered with multiple layers of thermal insulation coating, which can improve the contact between the various coatings and avoid the consumption of hydrophobic groups during use, thus greatly extending the service life of the fabric.

[0096] In Comparative Example 1, changing the semi-solid state of the insulation layer to a fully solidified state reduced the adhesion between the insulation layer and the inner and outer fabrics. Consequently, when the inner and outer fabrics were stretched, the pores of the inner and outer fabrics increased, resulting in rapid heat loss and easy entry of water molecules, thus reducing both insulation and waterproofing properties.

[0097] In Comparative Example 2, the surface tension of the inner and outer fabrics was adjusted to 0N. At this time, the inner and outer fabrics were in a completely relaxed state, the internal pores were closed, the hydrophobic groups could not enter the pores and could not combine with the thermal insulation coating. As a result, the thermal insulation performance was slightly reduced, while the waterproof performance was greatly reduced.

[0098] In Comparative Example 3, changing intermittent pressure to continuous pressure caused excessive adhesion between the adhesive mesh and the base fabric, and the thickness of the adhesive mesh was significantly reduced. This reduced the amount of heat-insulating coating that could be applied, resulting in a slight decrease in waterproofness and a significant decrease in heat-insulating performance.

[0099] In Comparative Example 4, only one layer of thermal insulation coating was applied to the inner surface of the base fabric, resulting in a reduction in the amount of thermal insulation coating applied, which in turn caused a slight reduction in waterproofness and a significant reduction in thermal insulation performance.

[0100] 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 method for preparing a seamless waterproof thermal fabric of a down jacket, the seamless waterproof thermal fabric comprising an inner layer, an outer layer fabric, characterized in that: The inner layer and outer layer fabric are separated by adhesive net to form a plurality of unit cells, the unit cells are regular hexagonal structure, the inner part of the unit cells is provided with a warm coating, the inner surfaces of the inner layer and outer layer fabric are coated with a modified waterproof coating, the modified waterproof coating comprises free hydrophobic group material, and a thermal insulation coating distributed in the internal gap of the inner layer and outer layer fabric and wrapped outside the free hydrophobic group material; The preparation steps of the seamless waterproof and warm fabric include: S1: coating a thermal insulation coating on the inner surfaces of the inner layer and outer layer fabric, drying at 50-80℃ for 15-20min, making the thermal insulation coating in semi-solid state, and stretching the periphery of the inner layer and outer layer fabric until the surface tension is 80-90N, so that the thermal insulation coating in semi-solid state enters the internal pores of the inner layer and outer layer fabric, and the free hydrophobic group material is coated, and the surface tension of the inner layer and outer layer fabric is adjusted to 10-20N, then the thermal insulation coating is coated again, and the tension and relaxation are repeated for multiple times, and the drying is carried out at 250-260℃ for 8-10min while the tension and relaxation, so as to obtain a modified waterproof layer fabric; In step S1, the free hydrophobic group material is prepared by stirring and refluxing 10%-15% PAMAM, 30%-35% benzaldehyde compound and 50%-60% ethanol under nitrogen protection for 30-85h, and then separating and purifying. S2: taking one piece of the above modified waterproof layer fabric as a base layer fabric, intermittently pressing the base layer fabric and the adhesive net at a temperature of 200-250℃ and a pressure of 70-90MPA for 15-35min, so that the adhesive net is hot-bonded to the inner surface of the base layer fabric, and a plurality of unit cells are formed on the inner surface of the base layer fabric; S3: coating the thermal insulation coating on the inner surface of the base layer fabric for multiple times until the thermal insulation coating is in a full filling state in the unit cells, and drying at 90-120℃ for 5-8min, so that the thermal insulation coating is in semi-solid state, and a composite base layer fabric is obtained; S4: taking another piece of the above modified waterproof layer fabric as a surface layer fabric, continuously pressing the composite base layer fabric and the surface layer fabric at a temperature of 100-150℃ and a pressure of 90-100MPA for 30-35min, so as to obtain the seamless waterproof and warm fabric.

2. The method for preparing a seamless waterproof and warm fabric for a down jacket according to claim 1, characterized in that: In step S1, the thermal insulation coating is prepared by mixing 30%-35% porous foam carbon powder and 20%-30% copper particles after heating and electroplating, cooling to room temperature, and adding 35%-50% liquid graphene.

3. The method for preparing a seamless waterproof and thermal down jacket fabric according to claim 1, characterized in that: In step S2, the adhesive net is a PU adhesive net.

4. The method for preparing a seamless waterproof and thermal down jacket fabric according to claim 1, characterized in that: In step S3, the thermal insulation coating is prepared by mixing 90-95 parts of polyurethane, 2-3 parts of thickening agent, 4-8 parts of crosslinking agent, 4-5 parts of foaming agent, 1.5-3 parts of ammonia water, 5-7 parts of anti-sticking agent, 8-10 parts of foam stabilizer, and adding 20-30 parts of perlite floating beads. In step S1, the thermal insulation coating is prepared by mixing 30%-35% porous foam carbon powder and 20%-30% copper particles after heating and electroplating, cooling to room temperature, and adding 35%-50% liquid graphene.

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