Preparation method of flat net embossed digital heat transfer flannelette blanket

Abstract

The invention relates to the technical field of flannelette blankets, in particular to a preparation method of a flat net embossed digital heat transfer flannelette blanket, which comprises the following steps: coating the back of a flocking base material with an adhesive liner layer containing a main body layer and a surface heat conduction channel layer, and coating the front of the flocking base material with a thermal response transfer coating; and then covering the surface with a digital pattern heat transfer film, preferentially softening the surface heat conduction channel layer through preheating, pressing by using a silica gel embossing template, maintaining the pressure to diffuse the dye, carrying out shock cooling shaping, and finally separating and rolling. Wherein a two-stage phase-change cooling process is adopted, water-cooling rollers are firstly used for rapid cooling, and then phase-change microcapsule-containing cold air flow is sprayed for slow cooling. The main body layer contains a filler and an olefin block copolymer in a specific ratio, the surface heat conduction channel layer and the thermal response transfer coating have unique compositions, and the main body layer is added with a stress neutralization filler. The flannelette blanket pad prepared by the method is clear in pattern, three-dimensional in embossing, stable in quality, good in environmental protection property and durable.

Description

Technical Field

[0001] This invention relates to the field of fleece mat technology, and in particular to a method for preparing a flat-web embossed digital heat transfer fleece mat. Background Technology

[0002] As people's living standards continue to improve, their demand for the functionality and aesthetics of home furnishings is also increasing. Fleece mattresses, as a common type of home furnishing, combine warmth and decoration, and are widely popular in the market. However, traditional methods of manufacturing fleece mattresses have certain limitations in terms of technology and material selection, making it difficult to meet modern consumers' pursuit of high-quality, personalized, and multifunctional products.

[0003] In the manufacturing process of fleece mats, pattern transfer and surface embossing are key steps to enhance the product's aesthetics. While traditional heat transfer technology can achieve pattern transfer, it falls short in terms of pattern clarity, color vibrancy, and adhesion to the substrate. Furthermore, ordinary embossing processes often struggle to create fine, three-dimensional embossing effects on the fleece mat surface, and problems such as uneven coating and inconsistent embossing depth can easily occur during the embossing process, affecting the overall quality of the product.

[0004] Furthermore, with increasing environmental awareness, consumers are demanding higher environmental performance from household products. Some materials used in traditional manufacturing methods may pose environmental risks, and the production process is energy-intensive, which is inconsistent with the concept of sustainable development.

[0005] Therefore, we propose a method for preparing a flat-web embossed digital heat transfer fleece pad to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for preparing a flat-web embossed digital heat transfer fleece mat.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for preparing a flat-web embossed digital heat transfer fleece mat includes the following steps: S1 Substrate pretreatment: Coating an adhesive backing layer onto the back of the flocked substrate, the adhesive backing layer consisting of a main layer and a surface heat-conducting channel layer; S2 Surface coating preparation: Coating a heat-responsive transfer coating onto the front of the flocked substrate; S3 Simultaneous embossing and heat transfer: Covering the surface of the heat-responsive transfer coating with a digital pattern heat transfer film; S31 Preheating stage: Heating with hot air to preferentially soften the surface heat-conducting channel layer; S32 Embossing stage: Pressing with a silicone embossing template to fill the template microstructure with the heat-responsive transfer coating; S33 Pressure holding and transfer stage: Cooling to allow the dye of the heat transfer film to diffuse into the heat-responsive transfer coating; S34 Rapid cooling and setting stage: Contacting with a water-cooled roller to separate and solidify the OBC phase; S4 Separation and winding: Removing the silicone embossing template and the heat transfer film to obtain a fleece mat with three-dimensional embossing and digital patterns.

[0009] As a preferred technical solution:

[0010] The preparation method of the flat mesh embossed digital heat transfer fleece mat described above, wherein the main body layer comprises 60-90wt% filler and olefin block copolymer, wherein the filler is a compound of fly ash and aluminum hydroxide; the surface heat conduction channel layer is a strip-shaped protrusion structure distributed in a parallel array, with a protrusion height of 0.3-0.5mm and a width of 1-3mm.

[0011] The preparation method of the flat mesh embossed digital heat transfer fleece pad described above, wherein the surface heat conduction channel layer comprises: 50-60 wt% olefin block copolymer, 25-35 wt% flake alumina, and 5-10 wt% maleic anhydride grafted high-density polyethylene.

[0012] The preparation method of the flat mesh embossed digital heat transfer fleece mat described above, wherein the composition of the heat response transfer coating includes: 65-75 wt% low melting point copolyester, 15-25 wt% olefin block copolymer, 5-10 wt% nano-bentonite, and 1-3 wt% carbon black.

[0013] The preparation method of the flat-web embossed digital heat transfer fleece mat as described above, in step S3, includes: S31 preheating stage: heating with hot air at 80±5℃ for 30-40 seconds to preferentially soften the surface heat conduction channel layer; S32 embossing stage: pressing with a silicone embossing template at 160-170℃ and 0.7-1.0MPa pressure for 5-8 seconds to fill the template microstructure with the heat-responsive transfer coating; S33 pressure holding and transfer stage: cooling to 125-135℃ and maintaining a pressure of 0.4-0.6MPa for 8-10 seconds to diffuse the dye of the heat transfer film to the heat-responsive transfer coating; S34 rapid cooling and setting stage: contacting with a water-cooled roller at 25-30℃ for 3-5 seconds to separate and solidify the OBC phase.

[0014] The preparation method of the flat embossed digital heat transfer fleece mat described above uses a two-stage phase change cooling process in the rapid cooling and shaping stage: First-stage cooling: the surface temperature of the fleece mat is reduced to 60±5℃ within 1 second by water-cooled rollers; Second-stage cooling: cold air containing phase change microcapsules is sprayed onto the back of the fleece mat, and the temperature is slowly reduced from 60℃ to 25℃ within 3-4 seconds.

[0015] The preparation method of the flat mesh embossed digital heat transfer fleece mat described above, wherein the phase change microcapsule comprises: outer shell: modified gelatin; core material: n-octadecane and nano boron nitride composite.

[0016] As described above, in the preparation method of a flat-web embossed digital heat transfer fleece pad, a stress-neutralizing filler is added to the main layer of the adhesive pad layer: the stress-neutralizing filler is porous ceramic microspheres loaded with zinc stearate, and the amount added is 5-8 wt% of the total filler; the porosity of the porous ceramic microspheres is >60%, the pore size is 1-5 μm, and the zinc stearate loading rate is ≥30 wt%.

[0017] Beneficial effects: By coating the back of the flocked substrate with an adhesive backing layer consisting of a main layer and a surface heat-conducting channel layer, the surface heat-conducting channel layer is softened preferentially, allowing the dye of the heat transfer film to fully diffuse into the heat-responsive transfer coating, thereby improving the clarity of the pattern, the vibrancy of the colors, and the adhesion to the substrate.

[0018] Using a silicone embossing template and pressing under specific temperature and pressure conditions, the heat-responsive transfer coating can uniformly fill the template's microstructure, creating a fine, three-dimensional embossing effect. Simultaneously, by precisely controlling various parameters during the embossing process, consistent embossing depth is ensured, enhancing the aesthetics and texture of the plush mat.

[0019] The two-stage phase change cooling process is adopted. The first stage of cooling uses water-cooled rollers to rapidly reduce the surface temperature of the blanket pad to a suitable range. The second stage of cooling sprays cold air containing phase change microcapsules onto the back of the blanket pad to achieve slow cooling. This allows for precise control of the cooling rate, ensuring uniform distribution of internal stress in the coating and preventing problems such as deformation and cracking, thereby improving the dimensional stability and quality of the product.

[0020] Adding stress-neutralizing fillers to the main layer of the adhesive backing layer, such as porous ceramic microspheres loaded with zinc stearate, can effectively neutralize the stress generated in the substrate during use, prevent coating peeling and substrate deformation, and extend the product's service life. Attached Figure Description

[0021] Figure 1 Line graphs showing data from embodiments and comparative examples of the present invention. Detailed Implementation

[0022] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of conflict, the definitions in this specification shall prevail. When a mass, concentration, temperature, time, or other value or parameter is expressed as a range, preferred range, or a series of upper and lower preferred values, this shall be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether such range is disclosed individually. For example, a range of 1-50 should be understood to include selections from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 3 Any number, combination of numbers, or subrange of numbers between the integers 6, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, or 50, and all decimal values ​​between the integers listed above, such as 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, and 1.9. Regarding subranges, specifically consider “nested subranges” extending from any endpoint of the range. For example, nested subranges of the exemplary range 1-50 could include 1-10, 1-20, 1-30, and 1-40 in one direction, or 50-40, 50-30, 50-20, and 50-10 in another direction.

[0023] The present invention will be further explained below with reference to specific embodiments. Unless otherwise specified, the experimental methods described in the following embodiments are conventional methods; unless otherwise specified, the reagents and materials can be obtained commercially.

[0024] A method for preparing a flat-web embossed digital heat transfer fleece mat includes the following steps:

[0025] (1) Substrate pretreatment:

[0026] An adhesive backing layer is coated on the back of the flocked substrate. The adhesive backing layer consists of a main layer and a surface thermal channel layer.

[0027] The main body layer contains 60-90 wt% filler and olefin block copolymer (OBC), and the filler is a mixture of fly ash and aluminum hydroxide;

[0028] The surface heat conduction channel layer consists of a parallel array of strip-shaped protrusions, with a protrusion height of 0.3-0.5 mm and a width of 1-3 mm. Its composition includes:

[0029] 50-60wt% OBC (meeting DSC peak temperature ≥110℃ and ΔT ≥48℃), 25-35wt% flake alumina, 5-10wt% maleic anhydride grafted high-density polyethylene (MAH-g-HDPE).

[0030] (2) Surface coating preparation:

[0031] A heat-responsive transfer coating is applied to the front side of the flocked substrate, the composition of which includes:

[0032] Low melting point copolyester (Tm = 85-95℃) 65-75wt%, OBC 15-25wt%, nano-bentonite 5-10wt%, carbon black 1-3wt%;

[0033] (3) Synchronous embossing and heat transfer: The digital pattern heat transfer film is covered on the surface of the heat-responsive transfer coating;

[0034] Preheating stage: Heat with hot air at 80±5℃ for 30-40 seconds to soften the surface heat conduction channel layer preferentially;

[0035] Embossing stage: A silicone embossing template is pressed for 5-8 seconds at 160-170℃ and 0.7-1.0MPa pressure to allow the thermal response transfer coating to fill the template microstructure.

[0036] Pressure holding and transfer stage: Cool down to 125-135℃ and maintain a pressure of 0.4-0.6MPa for 8-10 seconds to allow the dye in the heat transfer film to diffuse into the heat-responsive transfer coating;

[0037] Rapid cooling and setting stage: The OBC phase is separated and solidified by contact with a water-cooled roller at 25-30℃ for 3-5 seconds;

[0038] (4) Separate winding:

[0039] Remove the silicone embossing template and heat transfer film to obtain a plush mat with three-dimensional embossing and digital patterns.

[0040] Specifically, in (3), a two-stage phase change cooling process is used in the rapid cooling and shaping stage:

[0041] Primary cooling: The surface temperature of the blanket pad is reduced to 60±5℃ (higher than the glass transition temperature Tg of OBC) within 1 second by water-cooled rollers;

[0042] Secondary cooling: A cool airflow containing phase change microcapsules is sprayed onto the back of the blanket pad, slowly reducing the temperature from 60°C to 25°C within 3-4 seconds. The phase change microcapsules contain:

[0043] Shell: Modified gelatin (wall thickness 0.5-1μm);

[0044] Core material: a composite of n-octadecane (phase transition temperature 28℃) and nano-boron nitride (10-20wt%).

[0045] Specifically, stress-neutralizing filler is added to the main layer of the adhesive liner:

[0046] The stress-neutralizing filler is porous ceramic microspheres (particle size 20-50μm) loaded with zinc stearate, and the addition amount is 5-8wt% of the total filler amount;

[0047] The porous ceramic microspheres have a porosity of >60%, a pore size of 1-5 μm, and a zinc stearate loading of ≥30 wt%.

[0048] Example 1

[0049] A method for preparing a flat-web embossed digital heat transfer fleece mat includes the following steps:

[0050] Substrate pretreatment:

[0051] Adhesive backing layer (total thickness 0.8mm) coated on the back of the flocked substrate:

[0052] Main layer: 70wt% filler (fly ash: aluminum hydroxide = 1:1 compound), 30wt% OBC (DSC peak temperature 115℃, ΔT = 50℃);

[0053] Surface thermal conductive channel layer: strip-shaped protrusions with a height of 0.3 mm and a width of 1.5 mm, containing 55 wt% OBC, 30 wt% flake alumina, and 8 wt% MAH-g-HDPE.

[0054] Surface coating preparation:

[0055] Front-side coating with thermally responsive transfer coating (0.2 mm thickness): 70 wt% low-melting-point copolyester (Tm = 88 °C), 20 wt% OBC, 7 wt% nano-bentonite, and 2 wt% carbon black.

[0056] Synchronous embossing and heat transfer:

[0057] Preheating: Heat with 80℃ hot air for 35 seconds;

[0058] Embossing: Silicone template pressed at 165℃ / 0.8MPa for 6 seconds;

[0059] Pressure holding and transfer: 130℃ / 0.5MPa maintained for 9 seconds;

[0060] Rapid cooling and setting:

[0061] Primary cooling: The water-cooled roller cools to 60°C in 3 seconds;

[0062] Secondary cooling: A jet of cold air containing phase change microcapsules (core material: 15wt% nano boron nitride + n-octadecane) is injected, which slowly cools the temperature to 25°C in 4 seconds.

[0063] Separate winding: Remove the template and transfer film.

[0064] Example 2

[0065] Differences from Example 1:

[0066] The heat conduction channel layer has a protrusion height of 0.4 mm and a width of 2 mm, and contains 58 wt% OBC;

[0067] Rapid cooling for shaping: First-stage cooling reduces the temperature to 62°C in 1 second, and second-stage cooling reduces the temperature to 26°C in 3.5 seconds;

[0068] The main layer is filled with 6 wt% stress-neutralizing filler (porous ceramic microspheres loaded with 35 wt% zinc stearate).

[0069] Example 3

[0070] Differences from Example 1:

[0071] The heat conduction channel layer has a protrusion height of 0.5 mm and a width of 3 mm, and contains 60 wt% OBC;

[0072] Embossing stage: 170℃ / 0.9MPa pressing for 7 seconds;

[0073] The phase change microcapsule core material contains 20 wt% nano boron nitride.

[0074] Example 4

[0075] Main layer: 65wt% filler + 8wt% stress neutralizing filler (65% porosity ceramic microspheres) + 27wt% OBC;

[0076] Rapid cooling and shaping: First-stage cooling reduces the temperature to 58°C in 1 second, and second-stage cooling reduces the temperature to 25°C in 3 seconds;

[0077] Thermally responsive transfer coating: 75 wt% copolyester (Tm = 92 °C).

[0078] Comparative Example 1

[0079] A method for preparing a flat-web embossed digital heat transfer fleece mat is basically the same as in Example 4, except that the surface heat conduction channel layer is eliminated and only a single main body layer is used.

[0080] Comparative Example 2

[0081] A method for preparing a flat-web embossed digital heat transfer fleece mat is basically the same as in Example 4, except that: the rapid cooling and shaping is changed to direct water cooling to 25°C (without two-stage phase change cooling).

[0082] Comparative Example 3

[0083] A method for preparing a flat-net embossed digital heat transfer fleece mat is basically the same as in Example 4, except that stress neutralizing filler is not added.

[0084] Comparative Example 4

[0085] A method for preparing a flat-net embossed digital heat transfer fleece mat is basically the same as in Example 4, except that the phase change microcapsules are omitted and ordinary cold air is used instead of secondary cooling.

[0086] The fleece mats prepared in Examples 1 to 4 and Comparative Examples 1 to 4 were tested, and the results are shown in Table 1 below:

[0087] Table 1

[0088]

[0089]

[0090] Reference Figure 1 And Table 1, Embossing Clarity Analysis (lower values ​​are better):

[0091] Examples 1 to 4 (23.1–28.5 μm) significantly outperformed all comparative examples (32.5–45.3 μm), primarily due to the synergistic effect of the surface thermal channel layer and the two-stage phase change cooling.

[0092] The strip-shaped raised structure (containing sheet-like alumina) achieves directional heat conduction during the preheating stage (thermal conduction efficiency of 10.1℃ / s in Example 4), making the substrate soften uniformly and ensuring complete filling of the silicone template microstructure during embossing.

[0093] Two-stage phase change cooling (especially two-stage slow cooling) avoids sudden cooling and shrinkage of OBC, locking in the three-dimensional pattern.

[0094] Comparative Example 1 (45.3μm) suffered from reduced preheating efficiency to 3.1℃ / s due to the removal of the heat conduction channel layer, and insufficient softening of the substrate resulted in blurred embossing.

[0095] Comparative Example 2 (38.7 μm) and Comparative Example 4 (41.2 μm) suffered from internal stress due to cooling process defects (direct water cooling / no phase change microcapsules), resulting in springback deformation of the flower pattern.

[0096] Peel strength analysis (higher values ​​are better):

[0097] Example 4 achieves a peak strength of 15.0 N / cm, with the core relying on MAH-g-HDPE interface enhancement and complete phase separation from OBC:

[0098] The MAH-g-HDPE (8wt%) in the surface thermal conductive channel layer enhances the chemical bonding between the padding layer and the substrate;

[0099] Two-stage phase change cooling enables OBC to complete ordered phase separation during the slow cooling process (compared to direct water cooling, the intensity is increased by 47%).

[0100] Comparative Example 1 (8.5 N / cm) has weak interfacial bonding due to the lack of a heat conduction channel layer.

[0101] In Comparative Example 4 (9.8 N / cm), due to the replacement of the secondary cooling with ordinary cold air, the OBC phase separation was incomplete, which weakened the cohesive strength.

[0102] Size shrinkage analysis (lower values ​​are better):

[0103] Example 4 shows a shrinkage rate of only 1.0%, primarily attributed to the temperature control achieved through stress-neutralizing fillers and phase change microcapsules:

[0104] Porous ceramic microspheres (loaded with zinc stearate) absorb hot-compression stress, and their porosity >60% provides a deformation buffer space;

[0105] Phase change microcapsules (n-octadecane + nano boron nitride) make the cooling gradient gentle (60℃→25℃ takes 3 seconds) and avoid freezing stress in the amorphous region of OBC.

[0106] Comparative Example 3 (2.1%), without added stress filler, had double the heat shrinkage rate;

[0107] Comparative Example 2 (2.8%) showed that the substrate curled and deformed due to direct water cooling and sudden cooling stress.

[0108] Pattern colorfastness analysis (higher grades are better):

[0109] Example 3 / 4 reaches a maximum of level 5, the core of which stems from the synergistic effect of nano-boron nitride thermal conductivity and pressure holding-slow cooling:

[0110] Nano-boron nitride (20 wt%) in phase change microcapsules promotes the diffusion of dye molecules into the coating depth during the pressure holding stage;

[0111] Secondary slow cooling (60℃→25℃) prevents coating cracking and ensures more complete color fixation.

[0112] Comparative Example 4 (Levels 2-3): Due to the removal of phase change microcapsules, insufficient dye diffusion and cold air impact caused microcracks in the coating.

[0113] Comparative Example 1 (Level 3) had insufficient dye transfer rate due to uneven preheating.

[0114] Thermal conductivity analysis (higher values ​​are better):

[0115] Example 4 has a thermal conductivity of 10.1℃ / s, which relies on the directional heat conduction of sheet-like alumina (surface channel layer) and the enhanced heat dissipation of nano-boron nitride (phase change microcapsules):

[0116] Flaky alumina (25-35 wt%) forms longitudinal thermal channels in the strip-shaped protrusions;

[0117] Nano-boron nitride (10-20wt%) improves the thermal response rate of phase change materials.

[0118] In Comparative Example 1 (3.1℃ / s), heat transfer is delayed due to the elimination of the heat-conducting structure.

[0119] Comparative Example 4 (5.4℃ / s) lacks nano-boron nitride, resulting in a 46% reduction in secondary cooling heat dissipation efficiency.

[0120] In summary, the surface heat-conducting channel layer is the core guarantee for embossing accuracy (compared to Comparative Example 1, clarity increased by 48%); the two-stage phase change cooling solves the contradiction of thermal stress: the first stage of rapid cooling prevents pattern collapse, and the second stage of slow cooling improves peel strength (compared to Comparative Example 2, strength increased by 47%); the stress-neutralizing filler is the key to dimensional stability (compared to Comparative Example 3, shrinkage decreased by 52%); the whole system works synergistically (Example 4) to achieve simultaneous compliance with embossing clarity (23.1μm), peel strength (15.0N / cm), and color fastness (level 5), meeting the industrialization needs of high-end fleece mats.

[0121] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for preparing a flat-web embossed digital heat transfer fleece mat, characterized in that, Includes the following steps: S1 Substrate Pretreatment: An adhesive backing layer is coated on the back of the flocked substrate. The adhesive backing layer consists of a main layer and a surface heat-conducting channel layer. S2 surface coating preparation: A thermally responsive transfer coating is applied to the front side of the flocked substrate; S3 Synchronous Embossing and Heat Transfer: Covering the surface of the heat-responsive transfer coating with a digital pattern heat transfer film; S31 Preheating stage: Hot air heating to preferentially soften the surface heat conduction channel layer; S32 Embossing Stage: A silicone embossing template is used for pressing, allowing the thermally responsive transfer coating to fill the template's microstructure; S33 Pressure Holding and Transfer Stage: Cooling allows the dye in the heat transfer film to diffuse into the thermally responsive transfer coating; S34 rapid cooling and setting stage: The OBC phase is separated and solidified through contact with water-cooled rollers; S4 Separate Rewind: Remove the silicone embossing template and heat transfer film to obtain a plush mat with three-dimensional embossing and digital patterns.

2. The method for preparing a flat-web embossed digital heat transfer fleece mat according to claim 1, characterized in that, The main body layer comprises 60-90 wt% filler and olefin block copolymer, wherein the filler is a mixture of fly ash and aluminum hydroxide; The surface heat conduction channel layer is a parallel array of strip-shaped protrusions with a height of 0.3-0.5 mm and a width of 1-3 mm.

3. The method for preparing a flat-web embossed digital heat transfer fleece mat according to claim 2, characterized in that, The surface heat-conducting channel layer comprises: 50-60wt% olefin block copolymer, 25-35wt% flake alumina, 5-10wt% maleic anhydride-grafted high-density polyethylene.

4. The method for preparing a flat-web embossed digital heat transfer fleece mat according to claim 1, characterized in that, The composition of the thermally responsive transfer coating includes: Low melting point copolyester 65-75wt%, olefin block copolymer 15-25wt%, nano-bentonite 5-10wt%, carbon black 1-3wt%.

5. The method for preparing a flat-web embossed digital heat transfer fleece mat according to claim 1, characterized in that, S3 includes: S31 preheating stage: Heat with hot air at 80±5℃ for 30-40 seconds to soften the surface heat conduction channel layer preferentially; S32 Embossing Stage: A silicone embossing template is pressed for 5-8 seconds at 160-170℃ and 0.7-1.0MPa pressure to allow the thermal response transfer coating to fill the template microstructure. S33 Pressure Holding and Transfer Stage: Cool down to 125-135℃ and maintain a pressure of 0.4-0.6MPa for 8-10 seconds to allow the dye in the heat transfer film to diffuse into the heat-responsive transfer coating; S34 rapid cooling and setting stage: The OBC phase is separated and solidified by contact with a water-cooled roller at 25-30℃ for 3-5 seconds.

6. The method for preparing a flat-web embossed digital heat transfer fleece mat according to claim 1, characterized in that, The rapid cooling and shaping stage employs a two-stage phase change cooling process: Primary cooling: The surface temperature of the fleece mat is reduced to 60±5℃ within 1 second by water-cooled rollers; Secondary cooling: A stream of cold air containing phase change microcapsules is sprayed onto the back of the blanket pad, which slowly cools the temperature from 60°C to 25°C within 3-4 seconds.

7. The method for preparing a flat-web embossed digital heat transfer fleece mat according to claim 6, characterized in that, The phase change microcapsule contains: Outer shell: Modified gelatin; Core material: a composite of n-octadecane and nano-boron nitride.

8. The method for preparing a flat-web embossed digital heat transfer fleece mat according to claim 1, characterized in that, Add stress-neutralizing filler to the main layer of the adhesive liner: The stress-neutralizing filler is porous ceramic microspheres loaded with zinc stearate, and the addition amount is 5-8 wt% of the total filler content; The porous ceramic microspheres have a porosity >60%, a pore size of 1-5 μm, and a zinc stearate loading rate ≥30 wt%.

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