CN113290975A - Aluminum honeycomb sandwich composite table top plate capable of being subjected to flat edge sealing and manufacturing method thereof - Google Patents

Aluminum honeycomb sandwich composite table top plate capable of being subjected to flat edge sealing and manufacturing method thereof Download PDF

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Publication number
CN113290975A
CN113290975A CN202110257514.5A CN202110257514A CN113290975A CN 113290975 A CN113290975 A CN 113290975A CN 202110257514 A CN202110257514 A CN 202110257514A CN 113290975 A CN113290975 A CN 113290975A
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China
Prior art keywords
frame
adhesive
table top
edge sealing
upper panel
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Granted
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CN202110257514.5A
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CN113290975B (en
Inventor
虞雯
盛明祥
沈永华
周珍
杨宝庆
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Zhejiang Hengfeng Top Leisure Co Ltd
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Zhejiang Hengfeng Top Leisure Co Ltd
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B13/00—Details of tables or desks
    • A47B13/08—Table tops; Rims therefor
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    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
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    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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Abstract

The invention relates to the field of plates, and discloses an aluminum honeycomb sandwich composite table top plate capable of being subjected to flat edge sealing and a manufacturing method thereof, wherein the aluminum honeycomb sandwich composite table top plate comprises an upper panel, a lower panel and a sandwich layer clamped between the upper panel and the lower panel; the sandwich layer consists of a frame made of rigid thermoplastic foaming plastic or thermoplastic wood-plastic materials and an aluminum honeycomb filled in the frame; and an edge sealing strip is arranged on the outer side surface of the frame. The sandwich layer of the composite table top plate respectively takes porous light thermoplastic foaming plastic or thermoplastic wood-plastic material and the aluminum honeycomb as the frame and the filling core material, so that on one hand, the weight can be reduced on the premise of ensuring the strength of the table top plate so as to be convenient for transportation, and on the other hand, the flat sealing edge of the aluminum honeycomb sandwich composite plate can be realized, thereby further realizing the purposes of light weight, weather resistance and attractiveness.

Description

Aluminum honeycomb sandwich composite table top plate capable of being subjected to flat edge sealing and manufacturing method thereof
Technical Field
The invention relates to the field of plates, in particular to an aluminum honeycomb sandwich composite table top plate capable of being subjected to flat edge sealing and a manufacturing method thereof.
Background
Along with the popularization of outdoor sports and the increase of participated people, the market has an increasing demand on the lightweight of outdoor equipment. The existing indoor table top plate is mostly made of solid wood or solid wood composite and other solid materials, is heavier in weight, inconvenient to transport and waterproof. The outdoor table is light, convenient to transport and good in weather resistance.
At present, composite materials with a sandwich structure are mostly applied to the fields of aerospace, high-speed rail carriages or wind power blades and the like. In the field of panels, there are also some composite panels of "sandwich" structure. For example, patents CN201220072327.6, CN110281603A, etc. disclose composite sheets containing an aluminum honeycomb sandwich structure. Facilities such as the existing outdoor folding table are large in mass, and the plate adopting the aluminum honeycomb sandwich can effectively reduce the weight. But aluminum honeycomb table cannot use flat edge seals as indoor table. The reason is that the tangent plane of the vertical wall of the aluminum honeycomb core can be in contact with the edge sealing strip in a smaller area, and the aluminum honeycomb core cannot be effectively attached. Therefore, the aluminum honeycomb sandwich table plate can only be sealed by U-shaped aluminum edges, is not light and handy, and reduces the attractiveness and weather resistance of the table.
Disclosure of Invention
In order to solve the technical problems, the invention provides an aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing and a manufacturing method thereof.
The specific technical scheme of the invention is as follows: an aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing comprises an upper panel, a lower panel and a sandwich layer clamped between the upper panel and the lower panel; the sandwich layer consists of a frame made of rigid thermoplastic foaming plastic or thermoplastic wood-plastic materials and an aluminum honeycomb filled in the frame; and an edge sealing strip is arranged on the outer side surface of the frame.
The composite desktop plate is of a sandwich composite structure, wherein the sandwich layer respectively takes porous light thermoplastic foaming plastic or thermoplastic wood-plastic material and aluminum honeycomb as a frame and a filling core material, so that on one hand, the weight of the composite plate can be greatly reduced, and the composite desktop plate is convenient to transport; on the other hand, the tangent plane of the vertical wall of the aluminum honeycomb core can be in contact with the flat edge sealing strip in a small area and cannot be effectively attached, so that the aluminum honeycomb sandwich table plate can only be sealed by U-shaped aluminum edges, is not light and handy, and reduces the attractiveness and the weather resistance of the table. Due to the existence of the frame made of the rigid thermoplastic foaming plastic or the thermoplastic wood-plastic material, the edge sealing machine commonly used in the furniture industry can be used for carrying out flat edge sealing on the composite board on the basis of not obviously increasing the weight, so that the aims of light weight, high strength and attractiveness are further fulfilled.
Preferably, the upper panel or the lower panel is a fireproof plate, a compact plate or a glass fiber/carbon fiber reinforced resin matrix composite plate.
The upper and lower panels of the table top board have high strength and are firm and durable.
Preferably, the thickness of the upper panel and/or the lower panel is 1-3mm, and the thickness of the sandwich layer is 8-20 mm; the thickness of the edge sealing strip is 1-2 mm.
Preferably, the rigid thermoplastic foaming plastic is PET, PVC, PU, EPS, XPS, SAN, PMI; the plastic in the thermoplastic wood-plastic material is PS, HDPE, PP or PVC.
Preferably, the rigid thermoplastic foaming plastic is rigid foaming PET, and the preparation method comprises the following steps: carrying out copolymerization on purified terephthalic acid, ethylene glycol and sodium 5-sulfoisophthalate serving as raw materials under the action of a titanium catalyst, and granulating to obtain anion modified polyester beads; dipping the anion modified polyester beads in an aqueous solution containing 4-azidoaniline, carrying out ultrasonic treatment, and drying to obtain polyester beads enriched with 4-azidoaniline; uniformly mixing the polyester beads enriched with the 4-azidoaniline with a nucleating agent, an antioxidant, a branching agent, a chain extender and polytetrafluoro-terephthalic acid (PTT) to obtain a foaming material, heating the foaming material to a molten state, stirring under ultraviolet light for foaming, extruding and cooling the foamed material to expand cells, and curing, forming and cutting to obtain the hard foamed PET.
The traditional foaming PET is usually foamed by supercritical carbon dioxide, although the foaming PET can also be prepared, the foaming agent is difficult to be fully dispersed in the Polyester (PET) melt in the foaming process by the method, so that the density of the foamed material is not uniform. The hard foamed PET adopted by the invention is different from the conventional foamed PET: the method comprises the steps of firstly polymerizing to obtain polyester beads containing anionic (sulfo) functional groups, then soaking the polyester beads in an aqueous solution containing 4-azidoaniline, wherein the molecular structure of the 4-azidoaniline contains azido groups, nitrogen can be removed under ultraviolet irradiation to foam, and amino groups in the 4-azidoaniline are positively charged, so that the polyester beads can be quickly and uniformly and tightly adsorbed on the surfaces of negatively charged anionic modified polyester beads to form an enrichment phase, and drying to obtain the polyester beads enriched with the 4-azidoaniline. And finally, uniformly mixing the obtained polyester beads enriched with the 4-azidoaniline with a nucleating agent, an antioxidant, a branching agent, a chain extender and polytetrafluoro-terephthalic acid (PTT), melting, and extruding and foaming under the irradiation of ultraviolet light to obtain the hard foamed PET. By adopting the foaming method, the foaming agent can be uniformly enriched on the surface of each polyester bead, and uniform foaming is realized in the foaming process after the polyester is melted, so that the density of the obtained material is more uniform, and the strength is better under the same total density.
In addition, the traditional foamed PET has general water repellency, and is easy to permeate into water when being used as a table top board for outdoor use. In addition, the invention adds the poly-tetrafluoro-terephthalic acid trimethylene ester in the foaming process, and the poly-tetrafluoro-terephthalic acid trimethylene ester can participate in the cross-linking of the polyester and be fused into a whole under the action of the branching agent and the chain extender, so that the compatibility is better.
More preferably, the preparation method of the rigid thermoplastic foaming plastic, namely the rigid foaming PET, comprises the following steps:
uniformly mixing ethylene glycol, purified terephthalic acid and 5-sodium sulfoisophthalate according to the molar ratio of (1.2-1.5) to 1: 0.1-0.2, adjusting the pH of the slurry to 3.5-4.5, adding the slurry into a reaction kettle, carrying out esterification reaction at the conditions of 280 ℃ and 0.2-0.4MPa in the presence of a titanium catalyst with 1-10ppm of a raw material, carrying out pre-polycondensation at the temperature of 280 ℃ and 1500Pa in the presence of 260 ℃ and 1000 ℃ and pumping the obtained pre-polycondensation product into another reaction kettle, carrying out final polycondensation at the temperature of 280 ℃ in the presence of 260 ℃ and 50-300Pa, cooling, drying and granulating to obtain anion modified polyester beads;
soaking the anion modified polyester beads into an aqueous solution containing 1-10 wt% of 4-azidoaniline according to the solid-to-liquid ratio of 5-15g/100mL, carrying out ultrasonic treatment for 0.5-1.5h, and drying to obtain polyester beads enriched with 4-azidoaniline;
uniformly mixing the polyester beads enriched with the 4-azidoaniline, a nucleating agent, an antioxidant, a branching agent, a chain extender and poly (tetrafluoro-terephthalic acid) according to the mass ratio of 100: 1-3: 0.2-0.4: 0.3-0.7: 0.5-1.0 to obtain a foaming material, heating the foaming material to 260-300 ℃, stirring under the ultraviolet light with the wavelength of 365nm to foam, extruding and cooling the foamed material to expand foam holes, curing and molding, and cutting to obtain the hard foamed PET.
Preferably, the outer side surface of the upper panel and/or the lower panel is provided with a melamine resin coating.
In order to further improve the water repellency of the table top board, the outer side surface of the upper panel and/or the lower panel is provided with the melamine resin adhesive layer which has good water repellency and beautiful appearance.
Preferably, the upper panel, the lower panel and the sandwich layer are bonded by an adhesive; the frame is glued to the edge banding through the edge banding adhesive.
Preferably, the adhesive is urea-formaldehyde resin adhesive, epoxy adhesive, phenolic resin adhesive, polyvinyl acetate emulsion adhesive, synthetic rubber adhesive, casein adhesive, or EVA latex; the glue consumption is 150-2。
Preferably, the edge sealing adhesive is a PUR-based or epoxy-based edge sealing adhesive;
preferably, the material of the edge banding is thermoplastic plastics, and further preferably ABS, PP and PVC.
A manufacturing method of a composite table top board comprises the following steps:
1) coating an adhesive on the upper panel, attaching the frame to the upper panel, and filling aluminum honeycombs in the frame; and then, adhering a lower panel coated with an adhesive on the frame, and performing cold press molding.
2) And edge sealing is performed on the frame by adopting an edge sealing adhesive through an edge sealing machine, and the frame is horizontally placed and cured at room temperature.
Preferably, in the step 1), the cold pressing mode is room-temperature pressing for 20-30 h.
Preferably, in the step 2), the horizontal curing treatment time is 20-48 h.
Compared with the prior art, the invention has the beneficial effects that:
(1) the sandwich layer of the composite table top plate respectively takes porous light thermoplastic foaming plastic or thermoplastic wood-plastic material and the aluminum honeycomb as the frame and the filling core material, so that on one hand, the weight can be reduced on the premise of ensuring the strength of the table top plate so as to be convenient for transportation, and on the other hand, the flat sealing edge of the aluminum honeycomb sandwich composite plate can be realized, thereby further realizing the purposes of light weight, weather resistance and attractiveness.
(2) The composite table panel has excellent waterproof performance and is suitable for being placed outdoors.
Drawings
Fig. 1 is a schematic structural view of a composite table top board according to embodiment 1 of the present invention.
The reference signs are: the panel comprises an upper panel 1, a lower panel 2, a frame 3, an aluminum honeycomb 4 and an adhesive layer 5.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
An aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing comprises an upper panel (with the thickness of 1-3mm), a lower panel (with the thickness of 1-3mm) and a sandwich layer (8-20mm) arranged between the upper panel and the lower panel; the sandwich layer consists of a frame made of rigid thermoplastic foaming plastic/thermoplastic wood-plastic materials and an aluminum honeycomb filled in the frame; the outer side surface of the frame is provided with an edge sealing strip (thermoplastic plastics, preferably ABS, PP and PVC, and the thickness is 1-2 mm).
Wherein, the upper panel or the lower panel is a fireproof plate, an anti-doubling plate or a glass fiber/carbon fiber reinforced resin matrix composite plate.
Preferably, the outer side surface of the upper panel and/or the lower panel is provided with a melamine resin coating.
The hard thermoplastic foaming plastic is PET, PVC, PU, EPS, XPS, SAN, PMI, the plastic in the thermoplastic wood-plastic material is PS, HDPE, PP or PVC.
The preferable hard foaming PET is prepared by the following steps:
uniformly mixing ethylene glycol, purified terephthalic acid and 5-sodium sulfoisophthalate according to the molar ratio of (1.2-1.5) to 1: 0.1-0.2, adjusting the pH of the slurry to 3.5-4.5, adding the slurry into a reaction kettle, carrying out esterification reaction at the conditions of 280 ℃ and 0.2-0.4MPa in the presence of a titanium catalyst with 1-10ppm of a raw material, carrying out pre-polycondensation at the temperature of 280 ℃ and 1500Pa in the presence of 260 ℃ and 1000 ℃ and pumping the obtained pre-polycondensation product into another reaction kettle, carrying out final polycondensation at the temperature of 280 ℃ in the presence of 260 ℃ and 50-300Pa, cooling, drying and granulating to obtain anion modified polyester beads;
soaking the anion modified polyester beads into an aqueous solution containing 1-10 wt% of 4-azidoaniline according to the solid-to-liquid ratio of 5-15g/100mL, carrying out ultrasonic treatment for 0.5-1.5h, and drying to obtain polyester beads enriched with 4-azidoaniline;
uniformly mixing the polyester beads enriched with the 4-azidoaniline, a nucleating agent, an antioxidant, a branching agent, a chain extender and poly (tetrafluoro-terephthalic acid) according to the mass ratio of 100: 1-3: 0.2-0.4: 0.3-0.7: 0.5-1.0 to obtain a foaming material, heating the foaming material to 260-300 ℃, stirring under the ultraviolet light with the wavelength of 365nm to foam, extruding and cooling the foamed material to expand foam holes, curing and molding, and cutting to obtain the hard foamed PET.
The manufacturing method of the composite table top plate comprises the following steps:
1) coating an adhesive on the upper panel, attaching the frame to the upper panel, and filling aluminum honeycombs in the frame; then, attaching the lower panel coated with the adhesive on the frame, and cold-pressing at room temperature for 20-30h for molding;
2) and (5) edge sealing is carried out on the frame by adopting an edge sealing adhesive through an edge sealing machine, and the frame is horizontally placed and cured for 20-48h at room temperature.
Wherein the adhesive is urea-formaldehyde resin adhesive, epoxy adhesive, phenolic resin adhesive, polyvinyl acetate emulsion adhesive, synthetic rubber adhesive, casein adhesive and EVA latex; the glue consumption is 150-2. The edge sealing adhesive is a PUR-based or epoxy-based edge sealing adhesive.
Example 1
An aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing is shown in figure 1 and comprises an upper panel 1 (made of glass fiber reinforced plastics and having a thickness of 1mm), a lower panel 2 (made of glass fiber reinforced plastics and having a thickness of 1mm) and a sandwich layer (15mm) clamped between the upper panel and the lower panel, wherein the upper panel, the lower panel and the sandwich layer are bonded through an adhesive layer 5. The sandwich layer consists of a frame 3 made of hard foamed PET material and an aluminum honeycomb 4 filled in the frame; the lateral surface of frame is equipped with edge banding strip (PVC, thickness is 1 mm). The outer side surfaces of the upper panel and the lower panel are provided with melamine resin adhesive layers. The preparation method of the hard foamed PET comprises the following steps:
uniformly mixing ethylene glycol, purified terephthalic acid and 5-sodium sulfoisophthalate according to the mol ratio of 1.3: 1: 0.15, adjusting the pH value of slurry to 4, adding the slurry into a reaction kettle, carrying out esterification reaction at 250 ℃ and 0.2-0.4MPa, then adding a titanium catalyst with 5ppm of raw material, carrying out pre-polycondensation at 270 ℃ and 1000-1500Pa, pumping the obtained pre-polycondensation product into another reaction kettle, carrying out final polycondensation at 270 ℃ and 50-300Pa, cooling, drying and granulating to obtain anion modified polyester beads;
soaking the anion modified polyester beads into an aqueous solution containing 6 wt% of 4-azidoaniline according to the solid-to-liquid ratio of 10g/100mL, carrying out ultrasonic treatment for 1h, and drying to obtain polyester beads enriched with 4-azidoaniline;
uniformly mixing the polyester beads enriched with 4-azidoaniline with a nucleating agent (nylon 66), an antioxidant, a branching agent (triglycidyl isocyanurate), a chain extender (IPDI) and polytetrafluoro-terephthalic acid (PPT) to obtain a foaming material according to the mass ratio of 100: 2: 0.3: 0.5, heating the foaming material to 280 ℃, stirring the foaming material under the ultraviolet light with the wavelength of 365nm for foaming, extruding and cooling the foamed material to expand cells, and curing, forming and cutting the foamed material to obtain the hard foamed PET.
The manufacturing method of the composite table top plate comprises the following steps:
1) coating epoxy resin adhesive (adhesive amount is 200 g/m) on the upper panel2) Attaching the frame to the upper panel, and filling aluminum honeycombs in the frame; then, a lower panel coated with an adhesive is attached to the frame, and the frame is formed by cold pressing at room temperature for 24 hours;
2) and (3) edge sealing is performed on the frame by using an epoxy edge sealing adhesive through an edge sealing machine, and the frame is horizontally placed and cured for 48 hours at room temperature.
Comparative example 1
Comparative example 1 differs from example 1 in that the foamed PET (having a similar total density of the core layers) was foamed with supercritical carbon dioxide.
Comparative example 2
Comparative example 2 differs from example 1 in that conventional polyester beads (i.e.no sodium isophthalic acid-5-sulfonate added as compared to example 1) are used
Performance testing
(1) The density of the frame obtained in example 1 and comparative examples 1 to 3 was measured by first measuring the total density of the frame (thickness: 15mm) and then cutting the frame into four parts on average, and the results were as follows:
group number Total density of frame Block 1 density Block 2 Density Block 3 Density Block 4 Density
Example 1 100.1Kg/m3 100.0Kg/m3 100.2Kg/m3 100.3Kg/m3 99.8Kg/m3
Comparative example 1 108.3Kg/m3 110.1Kg/m3 111.5Kg/m3 108.3Kg/m3 103.6Kg/m3
Comparative example 2 100.3Kg/m3 102.4Kg/m3 98.6Kg/m3 99.3Kg/m3 101.1Kg/m3
From the above table data, it can be seen that: (1) the density difference of each block of example 1 was smaller with similar overall density compared to comparative example 1, indicating more uniform foaming. (2) Compared with comparative example 2, the total density of example 1 is significantly lower than that of comparative example 2, which shows that the foaming effect of the example is better. The reason is that the conventional polyester beads used in comparative example 2 were not able to effectively enrich 4-azidoaniline by electrostatic adsorption when immersed in an aqueous solution containing 4-azidoaniline and thus were not able to effectively foam.
Example 2
An aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing comprises an upper panel (a 1mm fireproof board, the outer surface of which is pasted with a melamine resin adhesive layer), a lower panel (a 1mm fireproof board, the outer surface of which is pasted with a melamine resin adhesive layer) and a sandwich layer (a PS wood-plastic frame, an aluminum honeycomb, 14 mm); the edge of the frame is provided with an edge banding strip (PVC 1 mm).
The manufacturing method of the composite table top plate comprises the following steps:
1) coating phenolic resin adhesive (adhesive consumption is 200 g/m)2) Attaching the frame to the upper panel, and filling aluminum honeycombs in the frame; then, a lower panel coated with an adhesive is attached to the frame, and the frame is formed by cold pressing at room temperature for 24 hours;
2) and (3) sealing the frame by using a PUR-based edge sealing adhesive through an edge sealing machine, and horizontally placing and curing for 24 hours at room temperature.
Example 3
An aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing comprises an upper panel (a 3mm compact board, the outer surface of which is stuck with a melamine resin adhesive layer), a lower panel (a 3mm compact board, the outer surface of which is stuck with a melamine resin adhesive layer) and a sandwich layer (a foamed PET frame, an aluminum honeycomb, 10 mm); the edge of the frame is provided with an edge banding strip (ABS 1.5 mm).
The preparation method of the hard foamed PET comprises the following steps:
uniformly mixing ethylene glycol, purified terephthalic acid and 5-sodium sulfoisophthalate according to the mol ratio of 1.2: 1: 0.1, adjusting the pH of slurry to 3.5, adding the slurry into a reaction kettle, carrying out esterification reaction at 220 ℃ and 0.2-0.4MPa, then adding 5ppm of a titanium catalyst as a raw material, carrying out pre-polycondensation at 260 ℃ and 1000-1500Pa, pumping the obtained pre-polycondensation product into another reaction kettle, carrying out final polycondensation at 260 ℃ and 50-300Pa, cooling, drying and granulating to obtain anion modified polyester beads;
soaking the anion modified polyester beads into an aqueous solution containing 2 wt% of 4-azidoaniline according to the solid-to-liquid ratio of 5g/100mL, carrying out ultrasonic treatment for 1h, and drying to obtain polyester beads enriched with 4-azidoaniline;
uniformly mixing the polyester beads enriched with 4-azidoaniline with a nucleating agent (nylon 66), an antioxidant, a branching agent (triglycidyl isocyanurate), a chain extender (IPDI) and polytetrafluoro-terephthalic acid (PPT) to obtain a foaming material according to the mass ratio of 100: 1: 0.2: 0.3, heating the foaming material to 260 ℃, stirring the foaming material under the ultraviolet light with the wavelength of 365nm for foaming, extruding and cooling the foamed material to expand cells, and curing, forming and cutting the foamed material to obtain the hard foamed PET.
The manufacturing method of the composite table top plate comprises the following steps:
1) urea-formaldehyde resin adhesive (the adhesive consumption is 250 g/m) is coated on the upper panel2) Attaching the frame to the upper panel, and filling aluminum honeycombs in the frame; then, a lower panel coated with an adhesive is attached to the frame, and the frame is formed by cold pressing at room temperature for 24 hours;
2) and (3) edge sealing is performed on the frame by using an epoxy edge sealing adhesive through an edge sealing machine, and the frame is horizontally placed and cured for 48 hours at room temperature.
Example 4
An aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing comprises an upper panel (2mm carbon fiber reinforced epoxy resin composite material), a lower panel (2mm carbon fiber reinforced epoxy resin composite material) and a sandwich layer (a foamed PET frame (same as embodiment 3), wherein the thickness of an aluminum honeycomb is 20 mm); the edge of the frame is provided with an edge banding strip (PVC 2 mm).
The manufacturing method of the composite table top plate comprises the following steps:
1) coating casein adhesive (adhesive consumption is 150 g/m) on the upper panel2) Attaching the frame to the upper panel, and filling aluminum honeycombs in the frame; then, a lower panel coated with an adhesive is attached to the frame, and cold pressing is carried out for 30h at room temperature for molding;
2) and (3) edge sealing is performed on the frame by using an epoxy edge sealing adhesive through an edge sealing machine, and the frame is horizontally placed and cured for 48 hours at room temperature.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (10)

1. An aluminum honeycomb sandwich composite table top board capable of being subjected to flat edge sealing comprises an upper panel, a lower panel and a sandwich layer clamped between the upper panel and the lower panel; the method is characterized in that: the sandwich layer consists of a frame made of rigid thermoplastic foaming plastic or thermoplastic wood-plastic materials and an aluminum honeycomb filled in the frame; and an edge sealing strip is arranged on the outer side surface of the frame.
2. The composite table top of claim 1, wherein: the upper panel or the lower panel is a fireproof plate, an anti-doubling plate or a glass fiber/carbon fiber reinforced resin matrix composite plate.
3. The composite table top of claim 1 or 2, wherein: the thickness of the upper panel and/or the lower panel is 1-3mm, and the thickness of the sandwich layer is 8-20 mm; the thickness of the edge sealing strip is 1-2 mm.
4. The composite table top of claim 1, wherein: the outer side surface of the upper panel and/or the lower panel is provided with a melamine resin adhesive layer.
5. The composite table top of claim 1, wherein: the rigid thermoplastic foaming plastic is PET, PVC, PU, EPS, XPS, SAN and PMI; the plastic in the thermoplastic wood-plastic material is PS, HDPE, PP or PVC.
6. The composite table top of claim 5, wherein: the rigid thermoplastic foaming plastic is rigid foaming PET, and the preparation method comprises the following steps: carrying out copolymerization on purified terephthalic acid, ethylene glycol and sodium 5-sulfoisophthalate serving as raw materials under the action of a titanium catalyst, and granulating to obtain anion modified polyester beads; dipping the anion modified polyester beads in an aqueous solution containing 4-azidoaniline, carrying out ultrasonic treatment, and drying to obtain polyester beads enriched with 4-azidoaniline; uniformly mixing the polyester beads enriched with the 4-azidoaniline with a nucleating agent, an antioxidant, a branching agent, a chain extender and polytetrafluoro-terephthalic acid (PTT) to obtain a foaming material, heating the foaming material to a molten state, stirring under ultraviolet light for foaming, extruding and cooling the foamed material to expand cells, and curing, forming and cutting to obtain the hard foamed PET.
7. The composite table top of claim 1, wherein: the upper panel, the lower panel and the sandwich layer are bonded by an adhesive; the frame is glued to the edge banding through the edge banding adhesive.
8. The composite table top of claim 7, wherein:
the adhesive is urea-formaldehyde resin adhesive, epoxy adhesive, phenolic resin adhesive, polyvinyl acetate emulsion adhesive, synthetic rubber adhesive, casein adhesive and EVA latex; the glue consumption is 150-2；
The edge sealing adhesive is a PUR-based or epoxy-based edge sealing adhesive;
the edge banding is made of thermoplastic plastics.
9. A method of making a composite table top according to any one of claims 1-8, comprising the steps of: 1) coating an adhesive on the upper panel, attaching the frame to the upper panel, and filling aluminum honeycombs in the frame; then, a lower panel coated with adhesive is attached to the frame, and cold press molding is carried out;
2) and edge sealing is performed on the frame by adopting an edge sealing adhesive through an edge sealing machine, and the frame is horizontally placed and cured at room temperature.
10. The method of manufacturing of claim 9, wherein:
in the step 1), the cold pressing mode is room temperature pressing for 20-30 h;
in the step 2), the horizontal curing treatment time is 20-48 h.
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CN110551277A (en) * 2018-05-30 2019-12-10 中国石油化工股份有限公司 PET for foaming, PET foaming material and preparation method of foaming material
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5399595A (en) * 1994-08-22 1995-03-21 Eastman Chemical Company Foamable copolyesters
CN1270606A (en) * 1997-07-23 2000-10-18 伊斯曼化学公司 Foamable copolyesters containing divalent metal sulfonate groups
US6258864B1 (en) * 1999-01-20 2001-07-10 Cabot Corporation Polymer foam containing chemically modified carbonaceous filler
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