Reflective material for preventing adhesion of bead planting layer and pasted object and preparation method of reflective material

Abstract

The invention relates to the technical field of reflective materials, in particular to a reflective material for preventing a bead planting layer from being adhered to an adhered object and a preparation method of the reflective material. The reflective material sequentially comprises a carrier layer, a bead planting layer, a reflective layer and a hot melt adhesive layer from top to bottom. The bead planting layer comprises a low-viscosity area and a high-viscosity area; the low-viscosity area has the viscosity of 1t; the viscous force of the high-viscosity area is greater than or equal to 1N / 25mm. The specific bead planting layer is adopted, the reflective material after waste discharge is cured and then attached to the attached object, the process is simple, the reflective material prepared through the method can easily peel off the bead planting layer and the attached object, and the attached object is free of adhesive residues and free of surface damage.

Description

Technical Field

[0001] The invention relates to the technical field of reflective materials, and in particular to a reflective material capable of preventing a beaded layer from adhering to an object to be attached, and a preparation method thereof. Background Art

[0002] Reflective materials are often applied to clothing fabrics and other surfaces to provide reflective warnings, decoration or other effects. The process involves first die-cutting the reflective material according to a preset pattern or text, and then firmly attaching the reflective layer to the fabric or fabric through heat pressing technology. After the attachment is completed, the carrier layer and the beaded layer on it are removed, so that the reflective layer is fully exposed, and finally the desired visual effect is achieved.

[0003] During the process of hot pressing and laminating reflective materials, the glue of the bead layer becomes sticky when heated, so it is easy to adhere tightly to the object being laminated during hot pressing. When it comes to the last step, that is, tearing off the carrier layer and the bead layer, the bead layer may be tightly attached to the surface of the laminated object, thus destroying the overall appearance. In addition, if the operation is improper, the carrier layer may be torn, making it difficult to completely remove. In particular, when the object being laminated is a textile fabric, the surface of the fabric may be pulled during this process, causing it to fluff or wrinkle, further affecting the final aesthetics.

[0004] For example, Chinese patent CN220171741U discloses a reflective strip with luminous material. The reflective strip is divided into a luminous area and a reflective area. A reflective coating is provided in the reflective area, and a luminous adhesive layer is provided in the luminous area. The luminous adhesive layer can emit light at night, and the reflective coating can reflect the light source at night. Therefore, the reflective strip can emit light in the absence of light in the environment, thereby playing a warning role. However, in the actual production process, after the waste material is stripped off, the adhesive layer is often easy to remain on the bonded object, which will result in a poor final display effect and affect the aesthetics. Summary of the invention

[0005] In order to solve the problems in the prior art, the present invention provides a reflective material that prevents a beaded layer from adhering to an object to be adhered, wherein the reflective material comprises, from top to bottom, a carrier layer, a beaded layer, a reflective layer, and a hot-melt adhesive layer, and the layers are fixedly connected; the beaded layer comprises a low-viscosity area and a high-viscosity area; the low-viscosity area is an area with an adhesive force <1N / 25mm, and the high-viscosity area is an area with an adhesive force ≥1N / 25mm.

[0006] In one embodiment, the adhesion of the low-adhesive area is <1 N / 25 mm, which can be 0.1 N / 25 mm, 0.2 N / 25 mm, 0.27 N / 25 mm, 0.36 N / 25 mm, 0.43 N / 25 mm, 0.76 N / 25 mm, and 0.8 N / 25 mm.

[0007] In one embodiment, the adhesion of the high adhesion area is ≥1N / 25mm.

[0008] In one embodiment, the bead-embedded layer includes any one of UV viscosity-reducing adhesive, electron beam curing adhesive, moisture curing adhesive, and heat curing adhesive.

[0009] In one embodiment, the viscosity of the UV viscosity-reducing adhesive at 25° C. is 1000-3000 mPa·s, which can be 1000, 2000, or 3000 mPa·s.

[0010] In a preferred embodiment, the model of the UV viscosity-reducing adhesive is NAR050-101, which is purchased from Dongguan Aozhong New Material Technology Co., Ltd.

[0011] In one embodiment, the solid content of the electron beam curing adhesive is 41-45wt%, which can be 41wt%, 42wt%, 43wt%, 44wt%, 45wt%. Preferably, the solid content of the electron beam curing adhesive is 42wt%.

[0012] In a preferred embodiment, the electron beam curing glue has a model of NR26-25000P, purchased from Xi'an Qiyue Biotechnology Co., Ltd.

[0013] In one embodiment, the moisture curing adhesive is of the type Teroson MS935, purchased from Henkel Loctite (China) Co., Ltd.

[0014] In one embodiment, the viscosity of the heat curing adhesive at 25° C. is 9000 mPa·s. Preferably, the heat curing adhesive is of model G500, purchased from Kangda New Materials (Stock) Co., Ltd.

[0015] The present invention does not further limit the materials of the reflective layer, the hot melt adhesive layer, and the carrier layer. The carrier layer can be exemplified by PET and glassine paper.

[0016] In one embodiment, the thickness of the carrier layer is 50-60 μm; the thickness of the bead layer is 30-40 μm.

[0017] In one embodiment, the thickness of the reflective layer is 200-250 μm; the thickness of the hot melt adhesive layer is 100-150 μm.

[0018] The second aspect of the present invention provides a method for preparing a reflective material for preventing a beaded layer from adhering to an object, comprising at least the following steps:

[0019] The carrier layer, the bead layer and the reflective layer are sequentially bonded, and the reflective layer and the hot melt adhesive layer are hot pressed to obtain a reflective material;

[0020] The reflective product is obtained by sequentially performing die-cutting, waste discharge, and curing the exposed bead-planting layer.

[0021] In one embodiment, the preparation method further comprises the step of heat-pressing and laminating the reflective layer and the hot-melt adhesive layer and then placing them in an oven for treatment, wherein the temperature of the oven treatment is 45-100° C. and the time is not less than 1 hour.

[0022] The temperature of the oven treatment can be listed as 45°C, 50°C, 60°C, 70°C, 80°C, 90°C, and 100°C; the time can be listed as 1h, 2h, 5h, 10h, 20h, 30h, 40h, 50h, 60h, 70h, and 72h.

[0023] In one embodiment, the conditions for the hot pressing composite are: the hot pressing temperature is 75-180° C., and the hot pressing time is 10-12 s.

[0024] The hot pressing temperature may be 75° C., 80° C., 90° C., 100° C., 120° C., 140° C., 160° C., 170° C., and 180° C. The hot pressing time may be 10 s, 11 s, or 12 s.

[0025] In one embodiment, the bonding conditions are: the bonding temperature is 45-160° C., and the bonding time is not less than 0.5 h.

[0026] The bonding temperature may be 45° C., 50° C., 60° C., 70° C., 80° C., 90° C., 100° C., 110° C., 120° C., 130° C., 140° C., 150° C., and 160° C. The bonding time may be 0.5 h, 0.8 h, 1 h, 2 h, 5 h, 10 h, 20 h, 30 h, 40 h, 50 h, 60 h, 70 h, and 72 h.

[0027] The die-cutting step in the present invention is to cut the reflective product from the hot-pressed adhesive layer to the beaded layer according to the pattern or text to be presented; the waste discharge step is to peel off the unnecessary hot-pressed adhesive layer and reflective layer from the beaded layer and the carrier layer along the cutting marks of the die-cut reflective product, and the reflective layer and hot-pressed adhesive layer remaining on the beaded layer and the carrier layer present the final required pattern or text for hot stamping with the attached object. The exposed plant adhesive portion after waste discharge in the present invention is the low-viscosity area.

[0028] In one embodiment, the curing method includes any one of UV cross-linking curing, electron beam cross-linking curing, moisture cross-linking curing, and thermal curing.

[0029] The curing in the present invention is not limited to the above-mentioned methods. Any curing method that makes the adhesion of the low-viscosity area of ​​the implanted bead layer of the present invention less than 1N / 25mm is applicable to the system of the present invention.

[0030] In one embodiment, the UV cross-linking curing conditions are: UV wavelength 365nm, radiation intensity 50W / cm 2 , irradiation time 5s.

[0031] In one embodiment, the conditions for the electron beam cross-linking and curing are: irradiation current 2 mA, irradiation time 10 s.

[0032] In one embodiment, the moisture cross-linking and curing conditions are: moisture curing in a constant temperature and humidity chamber with a humidity greater than 50% for 1 hour.

[0033] In one embodiment, the thermal curing conditions are: temperature 150° C., and curing time 20 min.

[0034] Beneficial Effects

[0035] 1. The present invention adopts a specific beading layer, and the waste reflective material is cured before being bonded to the object to be bonded, which can effectively prevent the beading layer from being bonded to the object to be bonded when the reflective material is hot-stamped.

[0036] 2. The bead-planting layer of the present invention includes a low-viscosity area and a high-viscosity area, and the adhesion of the low-viscosity area of ​​the bead-planting layer is controlled to be less than 1N / 25mm, which can effectively improve the residual glue on the adherend and make the product more beautiful.

[0037] 3. The method for preparing a reflective material that prevents the bead layer from adhering to the adhered object provided by the present invention has a simple process. The reflective material prepared by the method can easily peel off the bead layer and the adhered object, and the adhered object has no residual glue and no surface damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the structure of the reflective material for preventing the bead-planting layer from adhering to the adhered object prepared in Example 1 of the present invention; in the figure: 1. carrier layer; 2. bead-planting layer; 3. reflective layer; 4. hot melt adhesive layer; 5. low viscosity area; 6. high viscosity area. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The experimental methods for which specific conditions are not specified in the examples are carried out under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used that do not specify the manufacturer are all conventional products that can be purchased commercially.

[0040] Example 1

[0041] A first aspect of the present embodiment provides a reflective material that prevents a beaded layer from adhering to an adhered object, wherein the reflective material comprises, from top to bottom, a carrier layer, a beaded layer, a reflective layer, and a hot-melt adhesive layer, and each layer is fixedly connected; the beaded layer comprises a low-viscosity area and a high-viscosity area; the low-viscosity area is an area with an adhesive force of <1N / 25mm, and the high-viscosity area is an area with an adhesive force of ≥1N / 25mm.

[0042] The adhesion of the low-adhesive zone is 0.27 N / 25 mm; the adhesion of the high-adhesive zone is 5 N / 25 mm.

[0043] The beading layer is UV viscosity-reducing adhesive, and the model of the UV viscosity-reducing adhesive is NAR050-101, which is purchased from Dongguan Aozhong New Material Technology Co., Ltd.

[0044] The thickness of the beading layer is 30 μm.

[0045] The carrier layer is PET and has a thickness of 50 μm.

[0046] The reflective layer is glass microbeads with a particle size of 180 meshes and a thickness of 200 μm.

[0047] The hot melt adhesive layer is a PES adhesive film with a thickness of 100 μm.

[0048] A second aspect of the present embodiment provides a method for preparing a reflective material for preventing a beaded layer from adhering to an object, comprising the following steps:

[0049] Place a piece of PET on the coating machine, pour the UV viscosity-reducing adhesive on the PET, and coat it at a line speed of 2cm / s; then put it in a 100℃ oven for 0.5h, and then heat-press the PET coated with the UV viscosity-reducing adhesive with the reflective layer and the hot melt adhesive layer, where the heat-pressing temperature is 75℃ and the heat-pressing time is 12s. After heat-pressing and laminating, put it in a 45℃ oven for 72h to obtain a reflective product;

[0050] The reflective product is obtained by sequentially performing die-cutting, waste discharge, and UV cross-linking and curing of the exposed implanted pearl layer.

[0051] The UV cross-linking curing conditions are: UV wavelength 365nm, radiation intensity 50W / cm 2 , irradiation time 5s.

[0052] Figure 1 Schematic diagram of the structure of the reflective material for preventing the bead-planting layer from adhering to the adhered object prepared in Example 1 of the present invention; in the figure: 1. carrier layer; 2. bead-planting layer; 3. reflective layer; 4. hot melt adhesive layer; 5. low viscosity area; 6. high viscosity area.

[0053] Example 2

[0054] The specific implementation of this embodiment is the same as that of Embodiment 1, except that:

[0055] The adhesion of the low-adhesive zone is 0.36 N / 25 mm; the adhesion of the high-adhesive zone is 5.5 N / 25 mm.

[0056] The beading layer is electron beam cured glue, the model of the electron beam cured glue is NR26-25000P, purchased from Xi'an Qiyue Biotechnology Co., Ltd.

[0057] The carrier layer is glassine paper with a thickness of 50 μm.

[0058] The reflective layer is glass micro beads with a particle size of 300 meshes and a thickness of 200 μm.

[0059] The hot melt adhesive layer is a TPU adhesive film with a thickness of 100 μm.

[0060] A second aspect of the present embodiment provides a method for preparing a reflective material for preventing a beaded layer from adhering to an object, comprising the following steps:

[0061] Place a piece of glassine paper on the coating machine, pour the electron beam curing glue on the glassine paper, and coat it at a line speed of 3 cm / s; then put it in a 160°C oven for 0.8 hours, and then heat-press the glassine paper coated with the electron beam curing glue with the reflective layer and the hot melt adhesive layer, where the hot pressing temperature is 180°C and the hot pressing time is 12 seconds. After hot pressing and laminating, put it in a 50°C oven for 1 hour to obtain a reflective product;

[0062] The reflective product is obtained by sequentially performing die-cutting, waste discharge, and electron beam cross-linking and curing.

[0063] The conditions for the electron beam cross-linking and curing are: ambient temperature 25° C., irradiation current 2 mA, and irradiation time 10 s.

[0064] Example 3

[0065] The specific implementation of this embodiment is the same as that of Embodiment 1, except that:

[0066] The adhesion of the low-adhesive zone is 0.76 N / 25 mm; the adhesion of the high-adhesive zone is 6.2 N / 25 mm.

[0067] The beading layer is a moisture-curing adhesive, and the model of the moisture-curing adhesive is Teroson MS935, which is purchased from Henkel Loctite (China) Co., Ltd.

[0068] The reflective layer is glass micro beads with a particle size of 250 meshes and a thickness of 200 μm.

[0069] The hot melt adhesive layer is EVA hot melt adhesive with a thickness of 150 μm.

[0070] A second aspect of the present embodiment provides a method for preparing a reflective material for preventing a beaded layer from adhering to an object, comprising the following steps:

[0071] Place a piece of PET on the coating machine, pour the moisture-curing glue on the PET, and coat it at a line speed of 3cm / s; then put it in a 95℃ oven for 1 hour, and then heat-press the PET coated with moisture-curing glue with the reflective layer and the hot melt adhesive layer, where the heat-pressing temperature is 75℃ and the heat-pressing time is 12s. After heat-pressing and laminating, put it in a 60℃ oven for 1 hour to obtain a reflective product;

[0072] The reflective product is obtained by sequentially performing die-cutting, waste discharge, and moisture curing of the exposed implanted pearl layer.

[0073] The moisture cross-linking curing conditions are: moisture curing in a constant temperature and humidity chamber at a temperature of 80° C. and a humidity of 65% for 1 hour.

[0074] Example 4

[0075] The specific implementation of this embodiment is the same as that of Embodiment 1, except that:

[0076] The adhesion of the low-adhesive zone is 0.43 N / 25 mm; the adhesion of the high-adhesive zone is 6.1 N / 25 mm.

[0077] The bead implanting layer is a heat-curing adhesive, the model of the heat-curing adhesive is G500, purchased from Kangda New Materials (Stock) Co., Ltd.

[0078] The reflective layer is glass micro beads with a particle size of 170-270 meshes and a thickness of 200 μm.

[0079] The hot melt adhesive layer is TPU hot melt adhesive with a thickness of 100 μm.

[0080] A second aspect of the present embodiment provides a method for preparing a reflective material for preventing a beaded layer from adhering to an object, comprising the following steps:

[0081] Place a piece of PET on the coating machine, pour the heat-curing adhesive on the PET, and coat it at a line speed of 4cm / s; then put it in a 100℃ oven for 2h, and then heat-press the PET coated with the heat-curing adhesive with the reflective layer and the hot melt adhesive layer, where the heat-pressing temperature is 170℃ and the heat-pressing time is 10s. After heat-pressing and laminating, put it in a 100℃ oven for curing for 5h to obtain a reflective product;

[0082] The reflective product is obtained by sequentially performing die-cutting, waste discharge, and heat curing on the exposed area.

[0083] The heat curing conditions are: temperature 150° C., and curing time 20 min.

[0084] Comparative Example 1

[0085] The specific implementation of this comparative example is the same as that of Example 1, except that:

[0086] The conditions of UV cross-linking and curing are: UV wavelength 300nm, radiation intensity 50W / cm 2 , irradiation time 5s.

[0087] Comparative Example 2

[0088] The specific implementation of this comparative example is the same as that of Example 2, except that:

[0089] The conditions for the electron beam cross-linking and curing are: ambient temperature 25° C., irradiation current 0.5 mA, and irradiation time 10 s.

[0090] Comparative Example 3

[0091] The specific implementation of this comparative example is the same as that of Example 3, except that:

[0092] The moisture cross-linking and curing conditions are: moisture curing in a constant temperature and humidity chamber at a temperature of 80° C. and a humidity of 25% for 1 hour.

[0093] Comparative Example 4

[0094] The specific implementation of this comparative example is the same as that of Example 4, except that:

[0095] The heat curing conditions are: temperature 80° C., and curing time 15 min.

[0096] Comparative Example 5

[0097] The specific implementation of this comparative example is the same as that of Example 4, except that:

[0098] After the reflective product is die-cut and discharged in sequence, the exposed area is not heated and cured.

[0099] Performance Testing

[0100] The reflective materials prepared in the embodiments and comparative examples were cut into strips with a length of 300 mm and a width of 25 mm and pressed onto the same fabric. The peeling force was tested according to GB / T 2792-1998 and the residual adhesive on the fabric after the bead layer was peeled off was observed. The test data are shown in Table 1.

[0101] Table 1

[0102]

Claims

1. A reflective material for preventing the beaded layer from adhering to the object to be attached, characterized in that: The reflective material includes a carrier layer, a bead-embedded layer, a reflective layer, and a hot-melt adhesive layer from top to bottom, and each layer is fixedly connected; the bead-embedded layer includes a low-viscosity area and a high-viscosity area; the low-viscosity area is an area with an adhesive force of <1N / 25mm, and the high-viscosity area is an area with an adhesive force of ≥1N / 25mm.

2. The reflective material for preventing the beaded layer from adhering to the object according to claim 1, characterized in that: The bead-planting layer includes any one of UV viscosity-reducing adhesive, electron beam curing adhesive, moisture curing adhesive, and heat curing adhesive.

3. A method for preparing a reflective material for preventing the beaded layer from adhering to an object according to any one of claims 1 to 2, characterized in that: At least the following steps are included: The carrier layer, the bead layer and the reflective layer are sequentially bonded, and the reflective layer and the hot melt adhesive layer are hot pressed to obtain a reflective material; The reflective material is obtained by sequentially die-cutting, discharging waste, and curing the exposed bead-planting layer.

4. The method for preparing a reflective material for preventing the beaded layer from adhering to an object according to claim 3, characterized in that: The curing method includes any one of UV cross-linking curing, electron beam cross-linking curing, moisture cross-linking curing, and thermal curing.

5. The method for preparing a reflective material for preventing the beaded layer from adhering to an object according to claim 4, characterized in that: The UV cross-linking curing conditions are: UV wavelength 365nm, radiation intensity 50W / cm 2 , irradiation time 5s.

6. The method for preparing a reflective material for preventing the beaded layer from adhering to an object according to claim 4, characterized in that: The conditions for the electron beam cross-linking and curing are: irradiation current 2 mA, irradiation time 10 s.

7. The method for preparing a reflective material for preventing the beaded layer from adhering to an object according to claim 4, characterized in that: The moisture cross-linking and curing conditions are: moisture curing in a constant temperature and humidity chamber with a humidity greater than 50% for 1 hour.

8. The method for preparing a reflective material for preventing the beaded layer from adhering to an object according to claim 4, characterized in that: The heat curing conditions are: temperature 150° C., and curing time 20 min.

9. The method for preparing a reflective material for preventing the beaded layer from adhering to an object according to claim 3, characterized in that: The conditions for the hot pressing compound are: the hot pressing temperature is 75-180° C., and the hot pressing time is 10-12 seconds.

10. The method for preparing a reflective material for preventing the beaded layer from adhering to an object according to claim 3, characterized in that: The bonding conditions are: the bonding temperature is 45-160° C., and the bonding time is not less than 0.5 h.

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