Laser edge sealing resin and preparation method thereof

Abstract

The invention relates to a laser edge sealing adhesive raw material resin capable of realizing laser absorption sintering and a method for preparing the resin. The method comprises the following steps: uniformly mixing hot melt adhesive resin, an antioxidant, a nucleating agent, a hardening agent, a light absorber, a heat conducting agent, a coloring agent and an adhesion promoter through a screw, extruding and granulating to obtain the laser edge sealing resin capable of realizing laser absorption sintering edge sealing. Comprising but not limited to furniture edge sealing glue, panel coating glue and the like.

Description

Technical Field

[0001] The invention relates to a laser edge sealing resin capable of realizing laser sintering, belongs to the category of special materials and can realize near-infrared laser absorption sintering. Background Art

[0002] The furniture edge banding market has been widely concerned by various industries due to its large volume. In recent years, with the development of the furniture industry and the improvement of people's living standards, the market demand for environmentally friendly, pollution-free, beautiful appearance and easy operation edge banding materials has increased. Minli New Materials mentioned in its edge banding adhesive development trend report that green environmental protection, high performance, intelligence and automation, personalization and customization are the main directions of edge banding adhesive development.

[0003] At present, the mainstream edge banding glues on the market mainly include EVA edge banding glue, PUR edge banding glue and laser edge banding glue. The prices of the three are increasing in turn, and the quality is also improving in turn. EVA edge banding glue is the lowest cost and most popular edge banding glue among the edge banding glues. It is generally a copolymer of ethylene and vinyl acetate. It becomes sticky when melted by heat, and solidifies after cooling to complete the edge banding. The weather resistance of this glue is poor and it is suitable for the low-end edge banding market. PUR edge banding glue is a polyurethane hot melt glue. This glue has thermosetting characteristics. It is irreversible after heating and curing, which makes its weather resistance better than EVA. At the same time, due to the increase in viscosity during its curing, it requires less solvent and has extremely low formaldehyde emission. It has been promoted in the mid-to-high-end market. Laser edge banding glue uses laser to bandage the material. This operation makes the edge banding more delicate and there is no solvent involved in the whole process. It mainly relies on the absorption of laser to provide heat to the glue, so it is the main choice in the current high-end market. However, due to the fact that laser edge banding equipment is generally imported from abroad, the development of domestic laser edge banding adhesives is slow. As laser edge banding equipment is gradually localized, domestic laser edge banding materials also need to be developed. Therefore, it is necessary to develop a laser edge banding resin that can realize laser edge banding sintering to fill the gap in domestic laser edge banding adhesives. Summary of the invention

[0004] The purpose of the present invention is to provide a laser edge banding resin capable of laser sintering and a preparation method thereof. The resin has a strong response to near-infrared light and can convert light energy into heat energy and utilize it efficiently. It can be processed using a laser edge banding machine and has great application prospects in the field of furniture and household appliances.

[0005] A laser edge sealing resin comprises the following reaction raw materials: hot melt adhesive resin, light absorber, antioxidant, thermal conductor, colorant and adhesion promoter; the light absorber is one or more of antimony tin oxide, hexaboride, copper pyrophosphate, copper phosphate, basic copper phosphate, indium selenide, cadmium sulfide, polypyrrole and polycarbazole. Preferably, the light absorber is solid powder rather than liquid, can be well dispersed in the raw resin, and can withstand high temperatures below 800°C.

[0006] Based on the total amount of reaction raw materials, the antioxidant accounts for 0.5-3% by mass, the light absorber accounts for 0.5-2% by mass, the thermal conductor accounts for 0-1% by mass, the colorant accounts for 0-1% by mass, the adhesion promoter accounts for 0-1%, the nucleating agent accounts for 0.5-2%, and the hardener accounts for 0-2%; the rest is hot melt adhesive resin.

[0007] In the present invention, the hot melt adhesive resin is one or more of polyester hot melt adhesive, nylon hot melt adhesive, TPU hot melt adhesive, and EVA hot melt adhesive.

[0008] In the present invention, the antioxidant is one or more of hindered amines, cuprous iodides, potassium iodides, hindered phenols, phosphites, and inorganic phosphates; and / or the colorant is one or more of carbon black, organic black, and titanium dioxide; and / or the light absorber is one or more of antimony tin oxide, hexaboride, copper pyrophosphate, copper phosphate, basic copper phosphate, indium selenide, cadmium sulfide, polypyrrole, and polycarbazole; and / or the thermal conductor is one or more of hexagonal boron nitride, carbon nanotubes and their derivatives, graphene and their derivatives, and aluminum oxide; and / or the nucleating agent is an inorganic nucleating agent or an organic nucleating agent; and / or the hardener is one or more of stearic acid, mica, and talc; and / or the adhesion promoter is one or more of silane coupling agents, maleic anhydride, unsaturated carboxylic acids, and palmitic acids.

[0009] The present invention also relates to a method for preparing a laser edge sealing adhesive, wherein hot melt adhesive resin, light absorber, nucleating agent, hardener, antioxidant, thermal conductor, colorant and adhesion promoter are added into a screw, and then extruded, granulated and dried at 140-180°C to obtain a laser edge sealing resin capable of laser absorption and sintering.

[0010] The positive effect of the present invention is that a resin for laser edge banding adhesive is prepared, which encapsulates a light absorber, an adhesion promoter, and a thermal conductive additive inside the resin, so that the resin has excellent absorption of near-infrared and can efficiently utilize the converted heat, and can be processed using a laser edge banding machine. DETAILED DESCRIPTION

[0011] The technical solution of the present invention is described in detail below in conjunction with specific embodiments. The embodiments of the present invention are only used to illustrate the present invention, but the protection scope of the present invention is not limited to the following.

[0012] The hot melt adhesive was purchased from Tianyang New Materials Co., Ltd., the antioxidants, colorants, adhesion promoters, hardeners, and nucleating agents were purchased from Beijing Inokai Technology Co., Ltd., and the light absorbers and thermal conductive additives were purchased from Yantai Runwei New Materials Co., Ltd.

[0013] The peeling test equipment is a peeling force testing machine produced by Guangdong Sitai Instrument Co., Ltd.

[0014] [Example 1]

[0015] [1] 10 kg of nylon hot melt adhesive, 30 g of antioxidant 168, 30 g of antioxidant 1098, 200 g of basic copper phosphate powder, 100 g of hexagonal boron nitride, 100 g of titanium dioxide, 100 g of silane coupling agent, and 100 g of stearic acid were added to a screw, and then extruded at 140°C, granulated, and dried to obtain a laser edge sealing resin that can achieve laser absorption and sintering.

[0016] [2] The obtained particles were made into rubber strips by a strip drawing machine, and then the rubber strips were used to seal the composite board with a 1000W laser edge banding machine. The edge banding rubber strips were then subjected to a peeling test according to the ISO 8510 standard. The test results are shown in Table 1.

[0017] [Example 2]

[0018] [1] 10 kg of polyester hot melt adhesive, 150 g of antioxidant 626, 150 g of antioxidant 1010, 100 g of copper pyrophosphate powder, and 100 g of titanium dioxide were added to a screw, and then extruded, granulated, and dried at 150 ° C to obtain a laser edge sealing resin that can achieve laser absorption and sintering.

[0019] [2] The obtained particles were made into rubber strips by a strip drawing machine, and then the rubber strips were used to seal the composite board with a 1000W laser edge banding machine. The edge banding rubber strips were then subjected to a peeling test according to the ISO 8510 standard. The test results are shown in Table 1.

[0020] [Example 3]

[0021] [1] 10 kg TPU hot melt adhesive, 50 g cuprous iodide, 50 g potassium iodide, 50 g graphene, 50 g carbon black, 50 g maleic anhydride, 50 g nucleating agent P22, and 50 g mica powder were added into the screw, and then extruded at 180 ° C, granulated, and dried to obtain a laser edge sealing resin that can achieve laser absorption and sintering.

[0022] [2] The obtained particles were made into rubber strips by a strip drawing machine, and then the rubber strips were used to seal the composite board with a 1000W laser edge banding machine. The edge banding rubber strips were then subjected to a peeling test according to the ISO 8510 standard. The test results are shown in Table 1.

[0023] [Comparative Example]

[0024] [1] 10 kg of nylon hot melt adhesive, 30 g of antioxidant 168, and 30 g of antioxidant 1098 were added to the screw, and then extruded, granulated, and dried at 165°C to obtain a laser edge sealing resin that can achieve laser absorption and sintering.

[0025] [2] The obtained particles were made into rubber strips by a strip drawing machine, and then the rubber strips were used to seal the composite board with a 1000W laser edge banding machine. The edge banding rubber strips were then subjected to a peeling test according to the ISO 8510 standard. The test results are shown in Table 1.

[0026] Table 1 Peel force test results

[0027]

[0028] Data description: From Table 1, it can be seen that the comparative example failed to achieve edge sealing due to the addition of light absorber. At the same time, it can be seen that as the amount of light absorber added increases, the adhesion of the film also increases.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this field can make several improvements and supplements without departing from the method of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A raw material resin for laser edge sealing adhesive, characterized in that: The invention comprises the following reaction raw materials: hot melt adhesive resin, light absorber, nucleating agent, hardener, antioxidant, thermal conductor, colorant and adhesion promoter.

2. The laser edge sealing resin according to claim 1, characterized in that: Based on the total amount of reaction raw materials, the antioxidant accounts for 0.5%-3% by mass, the light absorber accounts for 0.5%-2% by mass, the thermal conductor accounts for 0-1% by mass, the colorant accounts for 0-1% by mass, the adhesion promoter accounts for 0-1%, the nucleating agent accounts for 0.5%-2%, and the hardener accounts for 0-2%; the rest is hot melt adhesive resin.

3. The laser edge sealing resin according to claim 1 or 2, characterized in that: The hot melt adhesive resin is one or more of polyester hot melt adhesive, nylon hot melt adhesive, TPU hot melt adhesive, and EVA hot melt adhesive.

4. The laser edge sealing resin according to any one of claims 1 to 3, characterized in that: The antioxidant is one or more of hindered amines, cuprous iodides, potassium iodides, hindered phenols, phosphites, and inorganic phosphates; and / or the colorant is one or more of carbon black, organic black, and titanium dioxide; and / or the light absorber is one or more of antimony tin oxide, hexaboride, copper pyrophosphate, copper phosphate, basic copper phosphate, indium selenide, cadmium sulfide, polypyrrole, and polycarbazole; and / or the thermal conductor is one or more of hexagonal boron nitride, carbon nanotubes and their derivatives, graphene and their derivatives, and aluminum oxide; and / or the nucleating agent is an inorganic nucleating agent or an organic nucleating agent; and / or the hardener is one or more of stearic acid, mica, and talc; and / or the adhesion promoter is one or more of silane coupling agents, maleic anhydride, unsaturated carboxylic acids, and palmitic acids.

5. The laser edge sealing resin according to any one of claims 1 to 4, characterized in that: Hot melt adhesive resin, light absorber, hardener, nucleating agent, antioxidant, thermal conductor, colorant and adhesion promoter are added into the screw, and then extruded, granulated and dried at 140-180°C to obtain a laser edge sealing resin capable of laser absorption and sintering.

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