Gold and silver stamping fabric based on PUR environment-friendly resin and preparation process of gold and silver stamping fabric

Abstract

The invention discloses a gold and silver stamping fabric based on PUR environment-friendly resin, the gold and silver stamping fabric sequentially comprises a base cloth layer, a PUR glue layer and a metal decoration layer from bottom to top, and the PUR glue layer is prepared from the following raw materials in percentage by weight: 93-98% of PUR aqueous dispersion and 2-7% of powder filler. According to the invention, the PUR water-based dispersion and the polyamide powder filler have a synergistic effect to form a high-crosslinking-degree polymer, so that the interface bonding force between the PUR adhesive layer and the base material layer is improved, the balance of environmental protection, wear resistance and durability is realized, and the environmental protection problem of the traditional solvent type adhesive is avoided. The gold and silver stamping film has high adhesive force and washing resistance, and has excellent wear resistance and high process stability through transfer of the metal decorative layer on the gold and silver stamping film, is suitable for large-scale continuous production, and has low rejection rate.

Description

Technical Field

[0001] This invention relates to the field of textile printing, specifically to a hot stamping fabric based on PUR environmentally friendly resin and its preparation process. Background Technology

[0002] Currently, most hot stamping fabrics use PVC or solvent-based adhesives, which require solvents. These solvents emit strong odors, have poor environmental performance, and insufficient durability. With increasingly stringent environmental requirements, replacing these solvent-based adhesives with non-solvent-based, environmentally friendly ones is urgently needed. PUR hot melt adhesive, as a reactive polyurethane hot melt adhesive, requires no organic solvents, contains no water, and is 100% solid, resulting in no volatile pollution and better meeting environmental requirements. However, PUR adhesive, being solvent-free, is difficult to penetrate and has poor leveling properties, making its use in hot stamping processes very challenging. It easily leads to poor abrasion resistance; after repeated friction, the metallic decorative layer loses its shine and curls at the edges, resulting in weak adhesion and easy detachment after washing. Therefore, developing a hot stamping fabric that is strong, abrasion-resistant, washable, and environmentally friendly is crucial.

[0003] Chinese invention patent CN106917301B discloses a fish-scale hot stamping fabric and its preparation process, which achieves a special texture effect through a double-layer adhesive structure. However, it uses oil-based adhesive, which has poor environmental friendliness. Chinese invention patent CN113635688B discloses a hot stamping printing process that utilizes polyamide and polyurethane to form a network structure after curing, enhancing the impact resistance, tensile strength, adhesion, and toughness of the print. However, the amount of polyamide used is large, resulting in high hot stamping printing costs. Summary of the Invention

[0004] In order to develop a hot stamping and silver foil fabric that is strong in adhesion, wear-resistant, wash-resistant and environmentally friendly, the first aspect of the present invention provides a hot stamping and silver foil fabric based on PUR environmentally friendly resin, which consists of a base fabric layer, a PUR adhesive layer and a metal decorative layer from bottom to top. The raw materials for preparing the PUR adhesive layer include 93-98% PUR aqueous dispersion and 2-7% powder filler by weight percentage.

[0005] In one embodiment, the base fabric layer includes at least one of polyester, nylon, or their interwoven fabrics.

[0006] In one embodiment, the PUR aqueous dispersion is a polyurethane reactive hot melt adhesive.

[0007] As one embodiment, the viscosity of the polyurethane reactive hot melt adhesive is 3500-6600 cps at 110℃-130℃.

[0008] In one embodiment, the powder filler includes at least one of polyamide, silica, or zinc oxide.

[0009] In one embodiment, the particle size of the powder filler is ≤200 mesh.

[0010] In one embodiment, the particle size of the powder filler is 200 mesh.

[0011] In one embodiment, the powder filler is polyamide.

[0012] As one implementation method, the application temperature of the PUR adhesive layer is 110-150℃.

[0013] This reactive polyurethane hot melt adhesive reacts with moisture on the substrate surface and cures to produce strong adhesion. The curing process involves the reaction between -NCO groups and moisture or substances containing active hydrogen, generating a highly cross-linked polymer. PUR hot melt adhesive requires no organic solvents, contains no moisture, and produces no volatile pollution, making it more environmentally friendly and a viable alternative to traditional oil-based adhesives for hot stamping on fabrics.

[0014] A second aspect of the present invention provides a process for preparing hot stamping and silver stamping fabrics based on PUR environmentally friendly resin, comprising the following steps: PUR aqueous dispersion and powder filler are mixed and heated to 130-170℃ in the equipment to obtain adhesive; Apply adhesive to a film containing a metallic decorative layer; The film containing the metal decorative layer, after the adhesive is applied, is transferred to the base fabric layer, and the adhesive is brought into contact with the base fabric layer to form the metal decorative layer and then cured by heat preservation. After curing, the film material is peeled off, allowing the remaining metallic decorative layer to be bonded to the base fabric layer through the PUR adhesive layer. After complete curing, the hot stamping and silver stamping fabric is obtained.

[0015] In one embodiment, the film material containing the metallic decorative layer is a hot stamping film.

[0016] In one embodiment, the metal decorative layer is a decorative layer containing gold and silver.

[0017] As one implementation method, the metal decorative layer forming process is hot stamping (gold or silver); the application pressure in the hot stamping process is 1.5-2.5 kg.

[0018] As one implementation method, the application temperature in the hot stamping process is 70-110℃.

[0019] In one embodiment, the hot stamping process uses a machine speed of 10-16 m / min and a screen depth of 11-12 filaments.

[0020] In one embodiment, the temperature for heat preservation curing is 20-45℃, the humidity for heat preservation curing is 50%-70%, and the time for heat preservation curing is 24-48h.

[0021] Compared with the prior art, the present invention has the following beneficial effects: (1) The hot stamping and silver stamping fabric of PUR environmentally friendly resin described in this invention uses the synergistic effect of PUR water-based dispersion and polyamide powder filler to form a highly cross-linked polymer, which improves the interfacial bonding force between PUR adhesive layer and substrate layer, and achieves a balance between environmental protection, wear resistance and durability, avoiding the environmental problems of traditional solvent-based adhesives.

[0022] (2) The hot stamping and silver stamping fabric of PUR environmentally friendly resin described in this invention uses a weight ratio of (93-98): (2-7) for PUR water-based dispersion and powder filler, which can make the PUR adhesive layer have high adhesion and water resistance. Through the transfer of the metal decorative layer on the hot stamping and silver stamping film, it has excellent wear resistance.

[0023] (3) The hot stamping and silver stamping fabric of PUR environmentally friendly resin described in this invention uses polyester, nylon or their interwoven fabric as the base layer, and the fabric is provided with a microporous buffer structure, which can alleviate thermal stress impact and prevent the metal layer from falling off.

[0024] (4) The preparation process of the hot stamping and silver stamping fabric of PUR environmentally friendly resin described in this invention uses a temperature of 70-110℃ and a pressure of 1.5-2.5kg to ensure that the metal decorative layer and the PUR adhesive layer are in full contact, promote rapid cross-linking and curing while avoiding thermal damage to the base fabric.

[0025] (5) The preparation process of the hot stamping and silver stamping fabric of PUR environmentally friendly resin described in this invention adopts a heat preservation curing temperature of 20-45℃ and a humidity of 50%-70%, which can control the curing speed and avoid the problem of the adhesive layer becoming brittle due to excessive curing and causing the metal layer to fall off.

[0026] (6) The preparation process of hot stamping and silver stamping fabrics made of PUR environmentally friendly resin described in this invention has strong process stability, is suitable for large-scale continuous production, and has a low scrap rate. Attached Figure Description

[0027] Figure 1-4 The appearance of the hot stamping and silver stamping fabrics based on PUR environmentally friendly resin prepared in Examples 1-4.

[0028] Figure 5 This is a photograph of the appearance after the ASTM D4966-22 abrasion resistance test was performed on Example 4.

[0029] Figure 6This is a photograph of the appearance after the ASTM D4970-2016 abrasion resistance test of Example 3.

[0030] Figure 7-10 These are photographs of the appearance after the washability test of Examples 1-4. Detailed Implementation

[0031] Example 1 A hot stamping fabric based on PUR environmentally friendly resin, comprising, from bottom to top, a base fabric layer, a PUR adhesive layer, and a metal decorative layer. The raw materials for preparing the PUR adhesive layer include, by weight percentage, 94% PUR aqueous dispersion and 6% powder filler.

[0032] The PUR aqueous dispersion is a polyurethane reactive hot melt adhesive with a viscosity of 4760 cps at 120°C. It was purchased from Fuller Company and its brand name is TL6217.

[0033] The powder filler is polyamide with a particle size of 200 mesh, purchased from Arkema, France, under the brand name PLATAMIDI. @ M1757, PA80.

[0034] The application temperature of the PUR adhesive layer is 118℃.

[0035] A process for preparing hot stamping and silver stamping fabrics based on PUR environmentally friendly resin includes the following steps: PUR aqueous dispersion and powder filler are mixed and heated to 138°C in the equipment to obtain adhesive; Apply adhesive to a film containing a metallic decorative layer; The film containing the metal decorative layer, after the adhesive is applied, is transferred to the base fabric layer, and the adhesive is brought into contact with the base fabric layer to form the metal decorative layer and then cured by heat preservation. After curing, the film material is peeled off, allowing the remaining metallic decorative layer to be bonded to the base fabric layer through the PUR adhesive layer. After complete curing, the hot stamping and silver stamping fabric is obtained.

[0036] The film material containing the metallic decorative layer is a hot stamping film (gold or silver foil). The metallic decorative layer is a decorative layer containing gold or silver.

[0037] The metal decorative layer is formed by hot stamping (gold or silver). The hot stamping process involves a pressure of 2 kg, a temperature of 80°C, a speed of 13 m / min, and a screen depth of 11 filaments.

[0038] The temperature for heat preservation curing is 40°C, the humidity for heat preservation curing is 60%, and the time for heat preservation curing is 48 hours.

[0039] Example 2 A hot stamping fabric based on PUR environmentally friendly resin, comprising, from bottom to top, a base fabric layer, a PUR adhesive layer, and a metal decorative layer. The raw materials for preparing the PUR adhesive layer include 95% PUR aqueous dispersion and 5% powder filler by weight percentage.

[0040] The PUR aqueous dispersion is a polyurethane reactive hot melt adhesive with a viscosity of 4760 cps at 120°C. It was purchased from Fuller Company and its brand name is TL6217.

[0041] The powder filler is polyamide with a particle size of 200 mesh, purchased from Arkema, France, under the brand name PLATAMIDI. @ M1757, PA80.

[0042] The application temperature of the PUR adhesive layer is 120℃.

[0043] A process for preparing hot stamping and silver stamping fabrics based on PUR environmentally friendly resin includes the following steps: PUR aqueous dispersion and powder filler are mixed and heated to 140°C in the equipment to obtain adhesive; Apply adhesive to a film containing a metallic decorative layer; The film containing the metal decorative layer, after the adhesive is applied, is transferred to the base fabric layer, and the adhesive is brought into contact with the base fabric layer to form the metal decorative layer and then cured by heat preservation. After curing, the film material is peeled off, allowing the remaining metallic decorative layer to be bonded to the base fabric layer through the PUR adhesive layer. After complete curing, the hot stamping and silver stamping fabric is obtained.

[0044] The film material containing the metallic decorative layer is a hot stamping film (gold or silver foil). The metallic decorative layer is a decorative layer containing gold or silver.

[0045] The metal decorative layer is formed by hot stamping (gold or silver). The hot stamping process involves a pressure of 2 kg, a temperature of 80°C, a speed of 14 m / min, and a screen depth of 11 filaments.

[0046] The temperature for heat preservation curing is 40°C, the humidity for heat preservation curing is 60%, and the time for heat preservation curing is 48 hours.

[0047] Example 3 A hot stamping fabric based on PUR environmentally friendly resin, comprising, from bottom to top, a base fabric layer, a PUR adhesive layer, and a metal decorative layer. The raw materials for preparing the PUR adhesive layer include 95% PUR aqueous dispersion and 5% powder filler by weight percentage.

[0048] The PUR aqueous dispersion is a polyurethane reactive hot melt adhesive with a viscosity of 39,000 cps at 120°C. It was purchased from Fuller Company and its brand name is TL5319.

[0049] The powder filler is polyamide with a particle size of 200 mesh, purchased from Arkema, France, under the brand name PLATAMIDI. @ M1757, PA80.

[0050] A process for preparing hot stamping and silver stamping fabrics based on PUR environmentally friendly resin includes the following steps: PUR aqueous dispersion and powder filler are mixed and heated to 160°C in the equipment to obtain adhesive; Apply adhesive to a film containing a metallic decorative layer; The film containing the metal decorative layer, after the adhesive is applied, is transferred to the base fabric layer, and the adhesive is brought into contact with the base fabric layer to form the metal decorative layer and then cured by heat preservation. After curing, the film material is peeled off, allowing the remaining metallic decorative layer to be bonded to the base fabric layer through the PUR adhesive layer. After complete curing, the hot stamping and silver stamping fabric is obtained.

[0051] The film material containing the metallic decorative layer is a hot stamping film (gold or silver foil). The metallic decorative layer is a decorative layer containing gold or silver.

[0052] The metal decorative layer is formed by hot stamping (gold or silver). The hot stamping process involves a pressure of 2 kg, a temperature of 80°C, a speed of 14 m / min, and a screen depth of 12 filaments.

[0053] The temperature for heat preservation curing is 30°C, the humidity for heat preservation curing is 65%, and the time for heat preservation curing is 48 hours.

[0054] Example 4 A hot stamping fabric based on PUR environmentally friendly resin, comprising, from bottom to top, a base fabric layer, a PUR adhesive layer, and a metal decorative layer, wherein the raw materials for preparing the PUR adhesive layer include 100% PUR aqueous dispersion by weight percentage.

[0055] The PUR aqueous dispersion is a polyurethane reactive hot melt adhesive with a viscosity of 39,000 cps at 120°C. It was purchased from Fuller Company and its brand name is TL5319.

[0056] A process for preparing hot stamping and silver stamping fabrics based on PUR environmentally friendly resin includes the following steps: PUR aqueous dispersion and powder filler are mixed and heated to 160°C in the equipment to obtain adhesive; Apply adhesive to a film containing a metallic decorative layer; The film containing the metal decorative layer, after the adhesive is applied, is transferred to the base fabric layer, and the adhesive is brought into contact with the base fabric layer to form the metal decorative layer and then cured by heat preservation. After curing, the film material is peeled off, allowing the remaining metallic decorative layer to be bonded to the base fabric layer through the PUR adhesive layer. After complete curing, the hot stamping and silver stamping fabric is obtained.

[0057] The film material containing the metallic decorative layer is a hot stamping film (gold or silver foil). The metallic decorative layer is a decorative layer containing gold or silver.

[0058] The metal decorative layer is formed by hot stamping (gold or silver). The hot stamping process involves a pressure of 2 kg, a temperature of 80°C, a speed of 15 m / min, and a screen depth of 12 filaments.

[0059] The temperature for heat preservation curing is 30°C, the humidity for heat preservation curing is 65%, and the time for heat preservation curing is 48 hours.

[0060] Performance testing 1. Foil transfer test: Refer to the TWN-TE-001-Intertek test method, 2000r, test the foil transfer effect of Examples 1-4, ≥4 level is qualified.

[0061] 2. Abrasion Resistance 1: Referring to ASTM D4966-22, Examples 1-4 were tested under 9 kPa pressure for 10,000 cycles of friction to determine if silver residue appeared. Slight silver residue after ≥10,000 cycles of friction was considered acceptable. The test results for Example 4 are shown in the attached image. Figure 5 .

[0062] 3. Abrasion Resistance II: Referring to ASTM D4970-2016, tests were conducted on Examples 1-4 at 3 kPa pressure. After 1000 cycles, the Martindale abrasive exhibited pilling and a visible print appearance. No significant surface change was observed after 1000 cycles, indicating compliance. The test results for Example 3 are shown in the attached image. Figure 6 .

[0063] 4. Washability: Following AATCC 124 2018T2018T & CSSP 2013 methods, Columbia Care Code: 5007, 10 washes were performed: machine wash at 80℉ on gentle cycle, tumble dry on gentle cycle. The printed appearance deteriorated after 10 washes. Color change ≥ level 3 is acceptable. See the test results for Examples 1-4. Figure 7-10 .

[0064] 5. Appearance: Visually inspect the appearance of the hot stamping fabrics prepared in Examples 1-4. See the effect diagrams for Examples 1-4. Figure 1-4 .

[0065] The performance test results are shown in Table 1.

[0066] Table 1

Claims

1. A hot stamping / silver stamping fabric based on PUR environmentally friendly resin, characterized in that, From bottom to top, the layers are: a base fabric layer, a PUR adhesive layer, and a metal decorative layer. The raw materials for preparing the PUR adhesive layer include 93-98% PUR aqueous dispersion and 2-7% powder filler by weight percentage.

2. The hot stamping fabric according to claim 1, characterized in that, The PUR aqueous dispersion is a polyurethane reactive hot melt adhesive.

3. The hot stamping fabric according to claim 2, characterized in that, The viscosity of the polyurethane reactive hot melt adhesive is 3500-6600 cps at 110℃-130℃.

4. The hot stamping fabric according to claim 2, characterized in that, The powder filler includes at least one of polyamide, silica, or zinc oxide.

5. The hot stamping fabric according to claim 1, characterized in that, The application temperature of the PUR adhesive layer is 110-150℃.

6. A preparation process for hot stamping / silver stamping fabric based on PUR environmentally friendly resin according to any one of claims 1-5, characterized in that, Includes the following steps: PUR aqueous dispersion and powder filler are mixed and heated to 130-170℃ in the equipment to obtain adhesive; Apply adhesive to a film containing a metallic decorative layer; The film containing the metal decorative layer, after the adhesive is applied, is transferred to the base fabric layer, and the adhesive is brought into contact with the base fabric layer to form the metal decorative layer and then cured by heat preservation. After curing, the film material is peeled off, allowing the remaining metallic decorative layer to be bonded to the base fabric layer through the PUR adhesive layer. After complete curing, the hot stamping and silver stamping fabric is obtained.

7. The preparation process of the hot stamping fabric according to claim 6, characterized in that, The metal decorative layer is formed by hot stamping (gold or silver); the application pressure in the hot stamping process is 1.5-2.5 kg.

8. The preparation process of the hot stamping fabric according to claim 7, characterized in that, The hot stamping temperature for hot gold and silver foil is 70-110℃.

9. The preparation process of the hot stamping fabric according to claim 7, characterized in that, The hot stamping speed in the hot stamping process is 10-16 m / min.

10. The preparation process of the hot stamping fabric according to claim 6, characterized in that, The temperature for heat preservation curing is 20-45℃, the humidity for heat preservation curing is 50%-70%, and the time for heat preservation curing is 24-48h.

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