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CN-121989521-A - Environment-friendly low-smoke fireproof aluminum-plastic plate and production process thereof

CN121989521ACN 121989521 ACN121989521 ACN 121989521ACN-121989521-A

Abstract

The invention belongs to the technical field of building decoration composite materials, and particularly discloses an environment-friendly low-smoke fireproof aluminum-plastic plate and a production process thereof, wherein the aluminum-plastic plate sequentially comprises a surface coating, a surface aluminum plate, a first halogen-free adhesive layer, an environment-friendly low-smoke flame-retardant core layer, a second halogen-free adhesive layer and a bottom aluminum plate from outside to inside; the environment-friendly low-smoke flame-retardant core layer comprises the raw material components of linear low-density polyethylene, brucite powder, modified aluminum hydroxide, red phosphorus composite flame retardant, zinc borate, silane coupling agent KH-550, calcium stearate, antioxidant 1010, ammonium polyphosphate and nano montmorillonite. According to the environment-friendly low-smoke type fireproof aluminum-plastic plate and the production process, the excellent performances that the flame retardant grade reaches the A2 grade and the smoke density grade is less than or equal to 25 grade are achieved by optimizing the formula of the core layer and the multi-layer composite structure, meanwhile, the aluminum-plastic plate is guaranteed to have good mechanical properties and environment friendliness, and the problems that an existing product is poor in fireproof effect, large in smoke quantity, not environment-friendly and insufficient in mechanical properties are solved.

Inventors

  • LIN XIAOMIN

Assignees

  • 台州市佳信新材料科技有限公司

Dates

Publication Date
20260508
Application Date
20260225

Claims (10)

  1. 1. The environment-friendly low-smoke fireproof aluminum plastic plate is characterized by sequentially comprising, by weight, from outside to inside, a surface coating, a surface aluminum plate, a first halogen-free adhesive layer, an environment-friendly low-smoke flame-retardant core layer, a second halogen-free adhesive layer and a bottom aluminum plate, wherein the environment-friendly low-smoke flame-retardant core layer comprises, by weight, 30-40 parts of linear low-density polyethylene, 25-35 parts of brucite powder, 20-30 parts of modified aluminum hydroxide, 2-5 parts of red phosphorus composite flame retardant, 1-3 parts of zinc borate, 0.8-1.5 parts of silane coupling agent KH-550, 0.5-1.2 parts of calcium stearate, 0.2-0.5 part of antioxidant 1010, 1-4 parts of ammonium polyphosphate and 0.5-1.5 parts of nano montmorillonite.
  2. 2. The environment-friendly low-smoke fireproof aluminum plastic plate is characterized in that brucite powder is 8000-mesh ultrafine powder, the brucite powder is subjected to surface activation treatment, modified aluminum hydroxide is 6000-mesh powder, the modified aluminum hydroxide is coated and modified by a titanate coupling agent, nano montmorillonite is subjected to hexadecyl trimethyl ammonium bromide intercalation modification, the interlayer spacing is more than or equal to 3.5nm, the thickness of a core layer is 3.2-5.2mm, and the weight ratio of ammonium polyphosphate to red phosphorus composite flame retardant is 1:1-2:1.
  3. 3. The environment-friendly low-smoke fireproof aluminum plastic plate as claimed in claim 1, wherein the surface coating is a modified polyvinylidene fluoride coating, and the thickness of the coating is 0.02-0.04mm.
  4. 4. The environment-friendly low-smoke fireproof aluminum plastic plate is characterized in that the aluminum plate is 3003H26 type antirust aluminum plate, the thickness of a single aluminum plate is 0.25-0.30mm, the surface of the aluminum plate is subjected to chromizing treatment, and the thickness of the chromizing film is 80-120nm.
  5. 5. The environment-friendly low-smoke type fireproof aluminum-plastic panel according to claim 1, wherein the first halogen-free adhesive layer and the second halogen-free adhesive layer are halogen-free flame-retardant hot melt adhesive films, the main components of the hot melt adhesive films are prepared by blending ethylene-methyl acrylate copolymer and halogen-free phosphorus flame retardants, the sizing amount is 50-70g/m 2 , and the thickness of the adhesive films is 0.04-0.06mm.
  6. 6. The environment-friendly low-smoke fireproof aluminum-plastic panel according to claim 1, wherein the red phosphorus composite flame retardant is microencapsulated red phosphorus, the wall material of the microcapsule is melamine-formaldehyde resin, the mass content of the red phosphorus in the microencapsulated red phosphorus is more than or equal to 90%, and the particle size of the microencapsulated red phosphorus is 1-5 mu m.
  7. 7. The process for producing the environment-friendly low-smoke fireproof aluminum plastic panel according to any one of claims 1 to 6, which is characterized by comprising the following steps: step 1, pretreating an aluminum plate, namely degreasing and chromizing the surface aluminum plate and the bottom aluminum plate in sequence; Step 2, preparing a core material, namely weighing raw materials according to the weight portion of the environment-friendly low-smoke flame-retardant core layer, pre-dispersing nano montmorillonite and a silane coupling agent for 10min at 60-70 ℃, adding the rest raw materials into a high-speed mixer, mixing for 15-20min at the temperature of 80-100 ℃ and the rotating speed of 800-1000r/min to obtain a uniform premix, putting the premix into a double-screw extruder for melt mixing, extruding through a die head after mixing, and cooling and shaping to obtain the environment-friendly low-smoke flame-retardant core layer board; Step 3, coating preparation, namely coating a modified polyvinylidene fluoride coating on the outer surface of the surface aluminum plate pretreated in the step 1 by adopting a roller coating process, wherein the coating thickness is controlled to be 0.02-0.04mm, and curing for 10-15min at 200-220 ℃ after coating; Step 4, composite molding, namely sequentially stacking the surface coating, the surface aluminum plate, the first halogen-free adhesive layer, the environment-friendly low-smoke flame-retardant core layer, the second halogen-free adhesive layer and the bottom aluminum plate in sequence, and sending the materials into a hot press for hot pressing and compounding, wherein the compounding temperature is controlled to be 180-200 ℃, the compounding pressure is 1.5-2.5MPa, and the compounding time is 3-5min; And 5, post-treatment, namely cooling the compounded plate to 25-35 ℃ for 10-15min, and then cutting and edge trimming to obtain the environment-friendly low-smoke fireproof aluminum-plastic plate finished product.
  8. 8. The production process of the environment-friendly low-smoke type fireproof aluminum plastic panel according to claim 7, wherein in the step 1, the degreasing temperature is controlled to be 50-60 ℃, and the degreasing time is 3-5min.
  9. 9. The production process of the environment-friendly low-smoke fireproof aluminum plastic plate, which is disclosed in claim 7, is characterized in that in the step 1, chromate solution is adopted for chromizing treatment, the pH value of the solution is 1.5-2.5, the treatment time is 1-2min, and the aluminum plate is dried after the chromizing treatment, wherein the drying temperature is 120-140 ℃ and the drying time is 5-8min.
  10. 10. The production process of the environment-friendly low-smoke type fireproof aluminum-plastic panel according to claim 7, wherein in the step 2, the core layer board after cooling and shaping is placed into microwave treatment equipment and is treated for 5-8min under the conditions of 300-500W of power and 80-90 ℃ to finish secondary modification of the core layer.

Description

Environment-friendly low-smoke fireproof aluminum-plastic plate and production process thereof Technical Field The invention relates to the technical field of building decoration composite materials, in particular to an environment-friendly low-smoke fireproof aluminum-plastic plate and a production process thereof. Background The aluminum-plastic composite board is widely applied to the fields of building outer wall decoration, interior decoration, advertisement boards and the like by virtue of the advantages of light weight, attractive appearance, convenience in construction, high cost performance and the like. However, the core layer of the traditional aluminum-plastic plate mostly adopts inflammable materials such as common polyethylene, polystyrene and the like, has extremely poor flame retardant property, releases a large amount of toxic smoke and heat during combustion, brings great hidden danger to fire rescue and personnel evacuation, and has the defects that the existing improved fireproof aluminum-plastic plate is low in flame retardant efficiency, the mechanical property of a core material is reduced and easy to embrittle because a large amount of the flame retardant is required to be added in order to reach the fireproof grade, the smoke density grade is more than 50 when the smoke density is burnt, the smoke density is not in accordance with the low smoke requirement of high-end public places, and part of products adopt halogen-containing flame retardants or harmful auxiliary agents, generate toxic gases such as dioxin when the products are burnt, pollute the environment and endanger human health. Along with the strict implementation of related standards and the continuous improvement of requirements of public places on fire prevention, environmental protection and low smoke, the development of a fire-proof aluminum-plastic plate with high fire-retardant level, low smoke generation amount, excellent mechanical property, environmental protection and no pollution and a matched production process become the technical problem to be solved urgently in the industry. Disclosure of Invention The invention aims to provide an environment-friendly low-smoke fireproof aluminum-plastic plate and a production process, wherein the excellent performances that the flame retardant grade reaches A2 grade and the smoke density grade is less than or equal to 25 grade are realized by optimizing a formula of a core layer and a multi-layer composite structure, meanwhile, the aluminum-plastic plate is ensured to have good mechanical property and environmental protection, and the problems of poor fireproof effect, large smoke quantity, environmental protection and insufficient mechanical property of the existing product are solved. The invention provides an environment-friendly low-smoke fireproof aluminum plastic plate which sequentially comprises, by weight, 30-40 parts of linear low-density polyethylene, 25-35 parts of brucite powder, 20-30 parts of modified aluminum hydroxide, 2-5 parts of red phosphorus composite flame retardant, 1-3 parts of zinc borate, 0.8-1.5 parts of silane coupling agent KH-550, 0.5-1.2 parts of calcium stearate, 0.2-0.5 part of antioxidant 1010, 1-4 parts of ammonium polyphosphate and 0.5-1.5 parts of nano montmorillonite from outside to inside. Preferably, brucite powder is 8000 meshes of ultrafine powder and is subjected to surface activation treatment, modified aluminum hydroxide is 6000 meshes of powder and is subjected to coating modification by a titanate coupling agent, nano montmorillonite is subjected to hexadecyl trimethyl ammonium bromide intercalation modification, the interlayer spacing is more than or equal to 3.5nm, the core layer thickness is 3.2-5.2mm, and the weight ratio of ammonium polyphosphate to red phosphorus composite flame retardant is 1:1-2:1. Preferably, the surface coating adopts a modified polyvinylidene fluoride coating, and the thickness of the coating is 0.02-0.04mm. Preferably, the surface aluminum plate and the bottom aluminum plate are 3003H26 type antirust aluminum plates, the thickness of a single aluminum plate is 0.25-0.30mm, the surface of the aluminum plate is subjected to chromizing treatment, and the thickness of the chromizing film is 80-120nm. Preferably, the first halogen-free adhesive layer and the second halogen-free adhesive layer are halogen-free flame-retardant hot melt adhesive films, the main components of the hot melt adhesive films are prepared by blending ethylene-methyl acrylate copolymer and halogen-free phosphorus flame retardant, the glue coating amount is 50-70g/m 2, and the thickness of the adhesive films is 0.04-0.06mm. Preferably, the red phosphorus composite flame retardant is microencapsulated red phosphorus, the wall material of the microcapsule is melamine-formaldehyde resin, the mass content of the red phosphorus in the microencapsulated red phosphorus is more than or equal to 90%, and the particle size of the microencaps