CN112571561A - Compound flame retardant and method for improving performance of flame-retardant plywood adopting same - Google Patents
Compound flame retardant and method for improving performance of flame-retardant plywood adopting same Download PDFInfo
- Publication number
- CN112571561A CN112571561A CN202011402020.3A CN202011402020A CN112571561A CN 112571561 A CN112571561 A CN 112571561A CN 202011402020 A CN202011402020 A CN 202011402020A CN 112571561 A CN112571561 A CN 112571561A
- Authority
- CN
- China
- Prior art keywords
- parts
- retardant
- flame
- flame retardant
- plywood
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/30—Fireproofing
Abstract
The invention provides a compound flame retardant and a method for improving the performance of a flame-retardant plywood adopting the compound flame retardant, wherein the flame-retardant plywood is prepared by adopting the compound flame retardant, the compound flame retardant comprises a flame retardant, a silane coupling agent and glue, and the flame retardant comprises the following components in percentage by weight: silane coupling agent: 0.5-2% of melamine modified glue: 0.004 to 0.01: 0.8 to 2. The invention utilizes the reaction of the flame retardant and the melamine modified glue to increase the adhesiveness of the glue, utilizes the melamine modified glue to produce the flame-retardant plywood, optimizes and improves the production process and technical parameters of the flame-retardant plywood, and achieves the purposes of improving the performances of the product such as bonding strength, elastic modulus and the like while achieving good flame-retardant effect.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a compound flame retardant and a method for improving the performance of a flame-retardant plywood adopting the compound flame retardant.
Background
Plywood is a three-layer or multi-layer plate material made up by using wood segments and making them be rotary-cut into single board or sliced into thin wood and using adhesive to make them be glued together, and usually using odd number of layers of single board and making the fibre directions of adjacent layers of single board be mutually perpendicular. The traditional production process of the flame-retardant plate at present comprises the following steps:
(1) adding a powdery flame retardant into glue, and then layering and gluing to form the flame retardance of each glue layer of the plywood, so that the product achieves a certain flame retardant effect;
(2) directly pressing and pasting by using flame-retardant glue to prepare a flame-retardant plate, wherein the preparation method is similar to the process of the 1 st technology;
(3) utilize the fire-retardant soaking of medium plate to make the plywood use the median plate to reach certain flame retardant efficiency to make whole plywood reach the fire retardance, above-mentioned (2) and (3) scheme have an influence to the bonding property between medium plate and the medium plate layer, and the qualification rate is low, and fire-retardant board has problem of veneer and elastic modulus problem, can't reach relevant engineering requirement.
At present, the bonding strength and the elastic modulus of the plywood are always the pain points of the industry, particularly the flame-retardant plywood, a middle plate is dried after being flame-retardant and dipped, a similar saline-alkali layer can be formed on the surface layer, the bonding strength of the plate is influenced by the bonding of common glue, and the performance of the product is difficult to meet the use requirement.
The invention patent with the patent application number of CN202010130978.5 discloses an anticorrosive flame-retardant plywood and a manufacturing method thereof, wherein the plywood comprises: the core plate is horizontally arranged; the rubber plates are arranged on the upper surface and the lower surface of the core plate in a stacked mode; adhesives are coated between the upper surface of the core plate and the adjacent rubber plates, between the lower surface of the core plate and the adjacent rubber plates and between the opposite surfaces of the two adjacent rubber plates; the adhesive comprises the following components in parts by weight: phenolic resin: 40-50 parts of bisphenol A epoxy resin: 30-40 parts of epoxy chloropropane: 15-25 parts of sodium hydroxide: 10-15 parts of bentonite: 5-10 parts of a coupling agent: 1-5 parts of a thickening agent: 1-5 parts of a curing agent: 1-5 parts of deionized water: 50-60 parts of plywood, the plywood bonding strength is good, and the gluing agent is environmental protection and nontoxic, but the plywood that this patent was prepared's bonding strength and elasticity modulus performance are not good enough.
The invention patent with the patent application number of CN201911384524.4 discloses a flame-retardant plate, which comprises a substrate and a functional plate, wherein the functional plate comprises a flame-retardant layer, a sound absorption layer, an anticorrosive layer and an apparent layer, the flame-retardant layer, the sound absorption layer, the anticorrosive layer and the apparent layer are sequentially distributed along the substrate from inside to outside, the flame-retardant layer is formed by compounding magnesium oxide, magnesium chloride, water, a filler and a reinforcing material, the mass ratio of the magnesium oxide to the magnesium chloride to the water to the filler to the reinforcing material is 16:3:27:1:2, the thickness of the flame-retardant layer is 5mm, the sound absorption layer is a centrifugal glass wool layer, the thickness is 2mm, the anticorrosive layer is a melamine resin layer, the thickness is 2mm, and the apparent layer is a PVC film coating layer, and the thickness is 1 mm. The flame-retardant board can be carbonized in case of fire to be really non-combustible through the functional board, so that the flame-retardant board has high-efficiency flame retardance, but the flame-retardant board prepared by the patent is poor in bonding strength and elastic modulus performance.
Patent application number is CN 201922187207.5's utility model patent discloses a fire-retardant plywood, including the bearer bar, the first operation panel of inner wall fixedly connected with of bearer bar, the first bump of fixed surface of first operation panel, the surface of a plurality of first bumps and the first tie layer of the equal fixedly connected with in first operation panel surface. This fire-retardant plywood, in the in-service use process, the art creation is carried out through devices such as the spray gun that sends high temperature flame in first operation panel and second operation panel surface to the pyrograph creator, the high temperature permeates to the fixed plate direction through first operation panel and second operation panel, because the preparation material of first thermal insulation board and second thermal insulation board is silica aerogel, the fine nanometer network structure of silica aerogel has restricted the propagation of local heat excitation effectively, its solid state thermal conductivity is 2-3 orders of magnitude lower than corresponding glass state material, has fabulous thermal-insulated effect, but this patent does not solve the problem in the aspect of bonding strength and elastic modulus performance equally.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for improving the performance of a flame-retardant plywood, which utilizes the reaction of a flame retardant and melamine modified glue to increase the adhesiveness of the glue, utilizes the melamine modified glue to produce the flame-retardant plywood, optimizes and improves the production process and technical parameters of the flame-retardant plywood, and achieves the purposes of improving the bonding strength, the elastic modulus and other performances of the product while achieving good flame-retardant effect.
The invention provides the following technical scheme:
a compound flame retardant comprises a flame retardant, a silane coupling agent and glue, wherein the flame retardant comprises the following components in parts by weight: silane coupling agent: 0.5-2% of melamine modified glue: 0.004 to 0.01: 0.8 to 2.
Preferably, the flame retardant: silane coupling agent: 1-1.5 parts of melamine modified glue: 0.005-0.008: 1 to 1.5.
In any of the above embodiments, preferably, the flame retardant: silane coupling agent: melamine modified glue is 0.5: 0.004: 0.8.
in any of the above embodiments, preferably, the flame retardant: silane coupling agent: 1, melamine modified glue: 0.005: 1.
in any of the above embodiments, preferably, the flame retardant: silane coupling agent: 1.5 parts of melamine modified glue: 0.008: 1.5.
in any of the above embodiments, preferably, the flame retardant: silane coupling agent: 2 of melamine modified glue: 0.01: 2.
in any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 10-15 parts of magnesium hydroxide, 20-30 parts of magnesium carbonate, 10-20 parts of zinc borate, 5-10 parts of ammonium polyphosphate, 10-20 parts of polyaryl phosphoric acid, 5-10 parts of acrylonitrile and 15-20 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 11-14 parts of magnesium hydroxide, 22-28 parts of magnesium carbonate, 12-18 parts of zinc borate, 6-8 parts of ammonium polyphosphate, 12-18 parts of polyaryl phosphoric acid, 6-8 parts of acrylonitrile and 16-18 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 10 parts of magnesium hydroxide, 20 parts of magnesium carbonate, 10 parts of zinc borate, 5 parts of ammonium polyphosphate, 10 parts of polyaryl phosphoric acid, 5 parts of acrylonitrile and 15 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 11 parts of magnesium hydroxide, 22 parts of magnesium carbonate, 12 parts of zinc borate, 6 parts of ammonium polyphosphate, 12 parts of polyaryl phosphoric acid, 6 parts of acrylonitrile and 16 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 13 parts of magnesium hydroxide, 25 parts of magnesium carbonate, 15 parts of zinc borate, 7 parts of ammonium polyphosphate, 15 parts of polyaryl phosphoric acid, 7 parts of acrylonitrile and 17 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 14 parts of magnesium hydroxide, 28 parts of magnesium carbonate, 18 parts of zinc borate, 8 parts of ammonium polyphosphate, 18 parts of polyaryl phosphoric acid, 8 parts of acrylonitrile and 18 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 15 parts of magnesium hydroxide, 30 parts of magnesium carbonate, 20 parts of zinc borate, 10 parts of ammonium polyphosphate, 20 parts of polyaryl phosphoric acid, 10 parts of acrylonitrile and 20 parts of styrene.
The method for improving the performance of the flame-retardant plywood specifically comprises the following steps of:
(1) the preparation method comprises the following steps of preparing a compound flame retardant, wherein the raw materials comprise a flame retardant, a silane coupling agent and melamine modified glue, and the flame retardant comprises the following steps: silane coupling agent: 0.5-2% of melamine modified glue: 0.004 to 0.01: 0.8 to 2.
(3) (2) selecting a middle plate with a proper thickness to be impregnated in the compound flame retardant;
drying; controlling the water content of the dried middle plate to be 10-20%;
(4) gluing: after drying, gluing the middle plate by using melamine modified glue;
(5) cold pressing; after the glue is coated, the middle plate is subjected to blank forming, is in a longitudinal and transverse structure, and is subjected to cold pressing at the pressure of 7-12Mpa for 60 '-120'
(6) Hot pressing; and (4) carrying out hot pressing on the board blank after cold pressing, wherein the hot pressing pressure is 7-12Mpa, the temperature is 110-130 ℃, and after the steps (3) - (6), the veneer is formed.
Preferably, the flame retardant in step (1): silane coupling agent: the melamine modified adhesive (dosage ratio) is 1-1.5: 0.005-0.008: 1 to 1.5.
In any of the above embodiments, it is preferable that the flame retardant in the step (1): silane coupling agent: melamine modified glue is 0.5: 0.004: 0.8.
in any of the above embodiments, it is preferable that the flame retardant in the step (1): silane coupling agent: 1, melamine modified glue: 0.005: 1.
in any of the above embodiments, it is preferable that the flame retardant in the step (1): silane coupling agent: 1.5 parts of melamine modified glue: 0.008: 1.5.
in any of the above embodiments, it is preferable that the flame retardant in the step (1): silane coupling agent: 2 of melamine modified glue: 0.01: 2.
in any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 10-15 parts of magnesium hydroxide, 20-30 parts of magnesium carbonate, 10-20 parts of zinc borate, 5-10 parts of ammonium polyphosphate, 10-20 parts of polyaryl phosphoric acid, 5-10 parts of acrylonitrile and 15-20 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 11-14 parts of magnesium hydroxide, 22-28 parts of magnesium carbonate, 12-18 parts of zinc borate, 6-8 parts of ammonium polyphosphate, 12-18 parts of polyaryl phosphoric acid, 6-8 parts of acrylonitrile and 16-18 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 10 parts of magnesium hydroxide, 20 parts of magnesium carbonate, 10 parts of zinc borate, 5 parts of ammonium polyphosphate, 10 parts of polyaryl phosphoric acid, 5 parts of acrylonitrile and 15 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 11 parts of magnesium hydroxide, 22 parts of magnesium carbonate, 12 parts of zinc borate, 6 parts of ammonium polyphosphate, 12 parts of polyaryl phosphoric acid, 6 parts of acrylonitrile and 16 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 13 parts of magnesium hydroxide, 25 parts of magnesium carbonate, 15 parts of zinc borate, 7 parts of ammonium polyphosphate, 15 parts of polyaryl phosphoric acid, 7 parts of acrylonitrile and 17 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 14 parts of magnesium hydroxide, 28 parts of magnesium carbonate, 18 parts of zinc borate, 8 parts of ammonium polyphosphate, 18 parts of polyaryl phosphoric acid, 8 parts of acrylonitrile and 18 parts of styrene.
In any of the above schemes, preferably, the flame retardant is composed of the following raw materials in parts by weight: 15 parts of magnesium hydroxide, 30 parts of magnesium carbonate, 20 parts of zinc borate, 10 parts of ammonium polyphosphate, 20 parts of polyaryl phosphoric acid, 10 parts of acrylonitrile and 20 parts of styrene.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is less than 2.0 mm.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is 0.2mm-2.0 mm.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is 0.5mm-1.5 mm.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is 0.2 mm.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is 0.5 mm.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is 1 mm.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is 1.5 mm.
In any of the above schemes, preferably, the thickness of the middle plate in the step (2) is 2 mm.
In any of the above schemes, preferably, in the step (2), the middle plate is soaked in an immersion tank, and the compound flame retardant is pressurized to the interior of the wood fiber cells of the middle plate through vacuum pressurization, so that the middle plate has flame retardancy as a whole.
In any of the above embodiments, preferably, in the step (2), the pressure is applied by a vacuum impregnation tank, and the equipment pressure is: -0.1 to 4.0MPa, vacuum: 0 to-0.098 MPa for 2 to 10 hours. The compound fire retardant is pressurized into the wood fiber cells of the middle plate, so that the whole middle plate has fire resistance.
In any of the above embodiments, preferably, in the step (2), the pressure is applied by a vacuum impregnation tank, and the equipment pressure is: -0.1MPa, vacuum: -0.098MPa for 5 hours.
In any of the above embodiments, preferably, in the step (2), the pressure is applied by a vacuum impregnation tank, and the equipment pressure is: 1.0MPa, vacuum degree: 0.060MPa for 4 hours.
In any of the above embodiments, preferably, in the step (2), the pressure is applied by a vacuum impregnation tank, and the equipment pressure is: 2.0MPa, vacuum degree: -0.048MPa for 6 hours.
In any of the above embodiments, preferably, in the step (2), the pressure is applied by a vacuum impregnation tank, and the equipment pressure is: 4.0MPa, vacuum degree: 0.02MPa for 8 hours.
In any of the above schemes, preferably, the drying in the step (3) is performed according to the sequence of plate feeding, drying by suction, drying by cold air blowing, infrared drying, and plate discharging, the drying temperature is set to 80-100 ℃, the time is 20-60min, and the water content after drying is controlled to be 12-20%.
In any of the above schemes, preferably, the drying temperature in the step (3) is set to 80 ℃, and the time is 60 min.
In any of the above schemes, preferably, the drying temperature in the step (3) is set to 90 ℃ and the time is 40 min.
In any of the above schemes, preferably, the drying temperature in the step (3) is set to 100 ℃, and the time is 20 min.
In any of the above schemes, preferably, in the step (4), the coating amount of the middle plate glue is 200g per square meter.
In any of the above schemes, preferably, the cold pressing time in the step (5) is 50-140min, and the pressure is 6-14 Mpa. The cold pressing time is long, so that the glue and the phosphorus and nitrogen are fully mixed and reacted.
In any of the above schemes, preferably, the cold pressing time in the step (5) is 60-120min, and the pressure is 7-12 Mpa.
In any of the above schemes, preferably, the cool pressing time in the step (5) is 50min, and the pressure is 14 Mpa.
In any of the above schemes, preferably, the cool pressing time in the step (5) is 60min, and the pressure is 12 Mpa.
In any of the above schemes, preferably, the cool pressing time in the step (5) is 100min, and the pressure is 9 Mpa. In any of the above schemes, preferably, the cool pressing time in the step (5) is 120min, and the pressure is 7 Mpa.
In any of the above schemes, preferably, the hot pressing temperature in the step (6) is 105-.
In any of the above schemes, preferably, the hot pressing temperature in the step (6) is 110-.
In any of the above schemes, preferably, the hot pressing temperature in the step (6) is 105 ℃, the time is 35min, the pressure is 14Mpa, and the pressure holding time is 6 min. Ensuring the sufficient moisture removal of the base material and the sufficient solidification of the glue.
In any of the above schemes, preferably, the hot pressing temperature in the step (6) is 110 ℃, the time is 25min, the pressure is 12Mpa, and the pressure holding time is 5 min.
In any of the above schemes, preferably, the hot pressing temperature in the step (6) is 125 ℃, the time is 10min, the pressure is 10Mpa, and the pressure holding time is 4 min.
In any of the above schemes, preferably, the hot pressing temperature in the step (6) is 130 ℃, the time is 10min, the pressure is 7Mpa, and the pressure holding time is 4 min.
The application of the flame-retardant plywood prepared by the performance improvement method in the aspects of building, furniture, ship and vehicle interior decoration.
Advantageous effects
(1) The invention provides a performance improvement method of a flame-retardant plywood, and the preparation process of the compound flame retardant is characterized in that compared with the traditional aluminum-magnesium flame retardant or phosphorus-nitrogen flame retardant for wood, inorganic silicon is added into the phosphorus-nitrogen flame retardant and a silane coupling agent is added in a certain proportion for compounding, the inorganic silicon has a flame-retardant effect, the silane coupling agent is hydrolyzed when being soaked by a middle plate and reacts and polymerizes with phosphorus-nitrogen in the flame retardant, after drying, the flame retardant and the middle plate form an unbreakable adhesion effect, and a phosphorus-nitrogen crystal layer is formed on the surface layer, so that the whole flame-retardant effect of the middle plate in the material is achieved;
(2) the melamine modified glue is adopted, after the middle board is glued, melamine, ammonium chloride and the like in the glue react with phosphorus and nitrogen, the two organic layers are firmly connected, and the adhesiveness of the glue is enhanced; the dosage of the melamine modified adhesive is controlled to be 200g per square meter per layer;
(3) compared with the traditional 2.2mm-3.0mm, the middle plate thickness of the plywood is thinner than that of the traditional 2.2mm-3.0mm, the number of layers of the whole plywood is increased, the whole strength is stronger, and particularly, the performances such as elastic modulus, deformation resistance and the like are better:
(4) the qualified rate of the bonding strength of the flame-retardant plywood product prepared by the method is 100%, and the qualified rate of the elastic modulus is 100%.
According to the production process of the flame-retardant plywood, the flame retardant and the coupling agent are adjusted, the matched glue is specially selected and used, the components are optimized, and the technological parameters are selected and adjusted, so that the flame-retardant plywood with excellent performance is manufactured, and the flame-retardant plywood has excellent application potential and industrial production value.
Drawings
FIG. 1 is a block diagram of the production flow of a preferred embodiment of the method for improving the performance of a flame retardant plywood of the present invention.
Detailed Description
In order to further understand the technical features of the present invention, the present invention is described in detail with reference to the specific embodiments below. The embodiments are given by way of illustration only and not by way of limitation, and any insubstantial modifications, based on the present disclosure, may be made by those skilled in the art without departing from the scope of the present disclosure.
Example 1
A method for improving the performance of flame-retardant plywood specifically comprises the following steps:
(1) the preparation method comprises the following steps of preparing a compound flame retardant, wherein the raw materials comprise a flame retardant, a silane coupling agent and melamine modified glue, and the flame retardant comprises the following steps: silane coupling agent: melamine modified glue is 100: 0.6: 105. specifically, the flame retardant is prepared from the following raw materials in parts by weight: 13 parts of magnesium hydroxide, 25 parts of magnesium carbonate, 15 parts of zinc borate, 7 parts of ammonium polyphosphate, 15 parts of polyaryl phosphoric acid, 7 parts of acrylonitrile and 17 parts of styrene.
(2) Selecting a middle plate with proper thickness to be impregnated in the compound flame retardant; the middle plate with the thickness of 1.8mm is used, so that the number of layers of the whole plywood is increased, the whole strength is stronger, and particularly, the performances such as elastic modulus, deformation resistance and the like are better; pressurization by vacuum impregnation tank, equipment pressure: 3.0MPa, vacuum degree: 0.05MPa for 5 hours. Pressurizing the compound flame retardant into wood fiber cells of the middle plate to enable the middle plate to have flame retardance integrally;
(3) drying; the drying temperature is set to 90 ℃, the drying time is 40min, and the water content of the middle plate is controlled to be 10-20% after drying;
(4) gluing: after drying, gluing the middle plate by using melamine modified glue;
(5) cold pressing; after gluing, the middle board is subjected to blank assembly and longitudinal and transverse structure, then cold pressing is carried out for 120min, the pressure is 7Mpa, compared with the cold pressing time of the traditional plywood, the cold pressing time is increased by 1 hour, and the glue and phosphorus and nitrogen are fully mixed and reacted;
(6) hot pressing; and (3) carrying out hot pressing on the cold-pressed plate blank, wherein the hot pressing pressure is 10Mpa, and the pressure maintaining time is as follows: 4min, the temperature is 120 ℃, the hot pressing time is determined according to the thickness of the flame retardant plate, the hot pressing time is determined according to the integral thickness of the flame retardant plate, 9mm/12mm/15mm/18mm corresponds to 15min/20min/25min/30min, and the full moisture removal of the base material and the full curing of glue are ensured;
and (5) after the steps (3) to (6) are carried out, veneering to obtain the flame-retardant plywood.
The specific production flow is shown in fig. 1, and other preparation methods are common methods in the field, so that the detailed description is omitted.
And (3) carrying out performance detection on the prepared oriented strand board:
the detection standard is carried out according to the national standard, the comparative example is prepared by the same preparation method, except that urea-formaldehyde glue is adopted, the detection is carried out twice respectively, and compared with the flame-retardant plate prepared in the embodiment, the test results are shown in the following table 1:
1 example 1 test results of the performance of the flame retardant sheet and the general flame retardant sheet prepared in example 1
As can be seen from the test results in the table 1, the bonding strength of the flame-retardant board prepared by changing the flame retardant, namely adding the silane coupling agent, is significantly higher than that of the common flame-retardant board, and the flame-retardant board has very excellent application potential and industrial production value.
Example 2
A fire retardant plywood panel, similar to example 1, except that the panel thickness:
TABLE 2
As can be seen from the above Table 2, when the middle plate thickness is 1.7mm, the detection results of the elastic modulus (transverse striation) and the elastic modulus (transverse striation) are far higher than the detection results of the middle plate thickness which are 2.2mm and 3.0mm respectively.
Example 3
A flame-retardant plywood similar to that in example 1, except that the flame retardant comprises the following raw materials in parts by weight: 10 parts of magnesium hydroxide, 20 parts of magnesium carbonate, 10 parts of zinc borate, 5 parts of ammonium polyphosphate, 10 parts of polyaryl phosphoric acid, 5 parts of acrylonitrile and 15 parts of styrene.
Example 4
A flame-retardant plywood similar to that in example 1, except that the flame retardant comprises the following raw materials in parts by weight: 11 parts of magnesium hydroxide, 22 parts of magnesium carbonate, 12 parts of zinc borate, 6 parts of ammonium polyphosphate, 12 parts of polyaryl phosphoric acid, 6 parts of acrylonitrile and 16 parts of styrene.
Example 5
A flame-retardant plywood similar to that in example 1, except that the flame retardant comprises the following raw materials in parts by weight: 14 parts of magnesium hydroxide, 28 parts of magnesium carbonate, 18 parts of zinc borate, 8 parts of ammonium polyphosphate, 18 parts of polyaryl phosphoric acid, 8 parts of acrylonitrile and 18 parts of styrene.
Example 6
A flame-retardant plywood similar to that in example 1, except that the flame retardant comprises the following raw materials in parts by weight: 15 parts of magnesium hydroxide, 30 parts of magnesium carbonate, 20 parts of zinc borate, 10 parts of ammonium polyphosphate, 20 parts of polyaryl phosphoric acid, 10 parts of acrylonitrile and 20 parts of styrene.
Example 7
A flame retardant plywood panel, similar to example 1, except that the middle panel was 0.5mm thick.
Example 8
A flame retardant plywood panel, similar to example 1, except that the middle panel was 1mm thick.
Example 9
A flame retardant plywood panel, similar to example 1, except that the middle panel was 1.5mm thick.
Example 10
A flame-retardant plywood sheet, similar to example 1, except that in step (3), the drying temperature was set to 80 ℃ for 60 min.
Example 11
A flame-retardant plywood sheet, similar to example 1, except that in step (3), the drying temperature was set to 100 ℃ for 20 min.
Example 12
A flame-retardant plywood sheet was obtained in a similar manner to example 1, except that the cold pressing time in step (5) was 50min and the pressure was 14 MPa.
Example 13
A flame-retardant plywood sheet was obtained in a similar manner to example 1, except that the cold pressing time in step (5) was 60min and the pressure was 12 MPa.
Example 14
A flame-retardant plywood sheet was obtained in a similar manner to example 1, except that the cold pressing time in step (5) was 100min and the pressure was 9 MPa.
Example 15
A flame-retardant plywood sheet, similar to example 1, except that in the step (6), the hot-pressing temperature is 105 ℃ and the time is 35min, the pressure is 14Mpa, and the pressure-holding time is 6 min.
Example 16
A flame-retardant plywood sheet, similar to example 1, except that in the step (6), the hot-pressing temperature is 110 ℃ for 25min, the pressure is 12Mpa, and the pressure-holding time is 5 min.
Example 17
A flame-retardant plywood sheet was obtained in a similar manner to example 1, except that in the step (6), the hot-pressing temperature was 125 ℃ for 10 minutes, the pressure was 10MPa, and the holding time was 4 minutes.
Example 18
A flame-retardant plywood sheet was obtained in a similar manner to example 1, except that in the step (6), the hot-pressing temperature was 130 ℃ for 10 minutes, the pressure was 7MPa, and the holding time was 4 minutes.
Example 19
A flame-retardant plywood, similar to example 1, except that in step (2) the pressure was applied by means of a vacuum impregnation tank, the equipment pressure: 4.0MPa, vacuum degree: -0.098MPa for 2 hours.
The production process of the flame-retardant plywood manufactures the flame-retardant board with excellent performance by adjusting the flame retardant and the coupling agent, specifically selecting and using the matched glue, optimizing the components and selecting and adjusting the technological parameters. The application of medium plate thickness control is within 2.0mm, increases the whole plywood number of piles, and bulk strength is stronger, and especially the resistance to deformation of elastic modulus is better: the flame-retardant plywood products prepared in the embodiments 2 to 19 have good bonding strength and elastic modulus performance, the bonding strength qualified rate is 100%, the elastic modulus qualified rate is 100%, and the flame-retardant plywood products have excellent application potential and industrial production value.
The above-described embodiments are only illustrative and not restrictive, and any insubstantial modifications of the invention made by those skilled in the art are intended to be covered by the present invention.
Claims (10)
1. A compound flame retardant is characterized in that: the flame retardant comprises a flame retardant, a silane coupling agent and glue, wherein the flame retardant comprises the following components in parts by weight: silane coupling agent: 0.5-2% of melamine modified glue: 0.004 to 0.01: 0.8 to 2.
2. The compound flame retardant of claim 1, which is characterized in that: the flame retardant is as follows: silane coupling agent: 1-1.5 parts of melamine modified glue: 0.005-0.008: 1 to 1.5.
3. A method for improving the performance of flame-retardant plywood is characterized by comprising the following steps: the preparation method of the flame retardant according to any one of claims 1-2 comprises the following steps:
(1) the preparation method comprises the following steps of preparing a compound flame retardant, wherein the raw materials comprise a flame retardant, a silane coupling agent and melamine modified glue, and the flame retardant comprises the following steps: silane coupling agent: 0.5-2% of melamine modified glue: 0.004 to 0.01: 0.8 to 2;
(2) selecting a middle plate with proper thickness to be impregnated in the compound flame retardant;
(3) drying;
(4) gluing by using melamine modified glue;
(5) cold pressing;
(6) hot pressing;
and (5) after the steps (3) to (6) are repeated, veneering to obtain the flame-retardant plywood.
4. The method of improving the performance of fire retardant plywood as claimed in claim 3, wherein: the flame retardant in the step (1): silane coupling agent: 1-1.5 parts of melamine modified glue: 0.005-0.008: 1 to 1.5.
5. The method of improving the performance of fire retardant plywood as claimed in claim 3, wherein: and (3) the thickness of the middle plate in the step (2) is less than 2.0 mm.
6. The method of improving the performance of fire retardant plywood as claimed in claim 3, wherein: in the step (3), the drying temperature is set to be 80-100 ℃, the time is 20-60min, and the water content is controlled to be 12-20% after drying.
7. The method of improving the performance of fire retardant plywood as claimed in claim 3, wherein: the coating weight of the middle plate glue in the step (4) is 200 g/square meter.
8. The method of improving the performance of fire retardant plywood as claimed in claim 3, wherein: and (3) in the step (5), the cold pressing time is 50-140min, and the pressure is 6-14 MPa.
9. The method of improving the performance of fire retardant plywood as claimed in claim 3, wherein: the hot pressing temperature in the step (6) is 105-135 ℃, the time is 10-35 min, the pressure is 6-14MPa, and the pressure maintaining time is 3-6 min.
10. Use of a fire-retardant plywood produced by the method for improving properties according to any one of claims 3 to 9 for the interior decoration of buildings, furniture, ships and vehicles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011402020.3A CN112571561A (en) | 2020-12-03 | 2020-12-03 | Compound flame retardant and method for improving performance of flame-retardant plywood adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011402020.3A CN112571561A (en) | 2020-12-03 | 2020-12-03 | Compound flame retardant and method for improving performance of flame-retardant plywood adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112571561A true CN112571561A (en) | 2021-03-30 |
Family
ID=75127058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011402020.3A Pending CN112571561A (en) | 2020-12-03 | 2020-12-03 | Compound flame retardant and method for improving performance of flame-retardant plywood adopting same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112571561A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121274A (en) * | 2007-09-28 | 2008-02-13 | 东北林业大学 | Method for preparing flame-proof plywood |
| CN102114650A (en) * | 2010-12-21 | 2011-07-06 | 北京盛大华源科技有限公司 | Antiflaming plywood or veneer lamination and manufacturing method thereof |
| CN105014753A (en) * | 2015-07-14 | 2015-11-04 | 王伟宏 | Fast-growing wood flame-retardant laminated plate and production method thereof |
| CN111635714A (en) * | 2020-06-22 | 2020-09-08 | 袁志伟 | Wood-based panel environment-friendly efficient smoke-suppressing additive flame retardant |
-
2020
- 2020-12-03 CN CN202011402020.3A patent/CN112571561A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121274A (en) * | 2007-09-28 | 2008-02-13 | 东北林业大学 | Method for preparing flame-proof plywood |
| CN102114650A (en) * | 2010-12-21 | 2011-07-06 | 北京盛大华源科技有限公司 | Antiflaming plywood or veneer lamination and manufacturing method thereof |
| CN105014753A (en) * | 2015-07-14 | 2015-11-04 | 王伟宏 | Fast-growing wood flame-retardant laminated plate and production method thereof |
| CN111635714A (en) * | 2020-06-22 | 2020-09-08 | 袁志伟 | Wood-based panel environment-friendly efficient smoke-suppressing additive flame retardant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111823681B (en) | Heat-insulation composite board and preparation method thereof | |
| CN111844962B (en) | Ceramic fiber reinforced aerogel felt and preparation method thereof | |
| CN111361240A (en) | Anticorrosive flame-retardant plywood and manufacturing method thereof | |
| KR20110041664A (en) | Sandwich panel filled with glass fiber needle felt | |
| CN111873089A (en) | Novel flame-retardant antibacterial high-strength environment-friendly composite board and preparation process and application thereof | |
| CN112571561A (en) | Compound flame retardant and method for improving performance of flame-retardant plywood adopting same | |
| CN112065234A (en) | Manufacturing process of fireproof explosion-proof door | |
| JP2901841B2 (en) | Laminated material and method for producing the same | |
| CN106750421A (en) | A kind of phenolic resin enhancing composite and preparation method thereof | |
| CN114232927B (en) | External wall heat-insulation decorative plate and preparation method thereof | |
| CN111703169B (en) | Composite heat insulation plate and preparation method thereof | |
| CN112457053B (en) | Modified calcium silicate board and surface treatment method and application thereof | |
| KR100893304B1 (en) | Method of incombustible veneer board useing the small-wood | |
| KR20020087818A (en) | The Manufacturing Method of Gypsum Structure Board using Glass Fiber Tissue Reinforcement and Phenolic Matrix Resin | |
| CN211917128U (en) | Anti-deformation nanoscale plywood | |
| CN218986028U (en) | Waterproof heat-insulating veneer | |
| CN115366205B (en) | Production process of anti-cracking melamine impregnated decorative wallboard | |
| CN210940791U (en) | Formaldehyde-free flame-retardant veneer chipboard and composite floor | |
| CN220741528U (en) | High-strength formaldehyde-free ecological flame-retardant plate | |
| CN110901187B (en) | Poplar veneer veneering sound insulation composite board and preparation method thereof | |
| CN213499791U (en) | Novel flame-retardant antibacterial high-strength environment-friendly composite board | |
| CN112339042B (en) | Heat insulation plywood and manufacturing method thereof | |
| CN111716464A (en) | Wooden plywood and manufacturing method thereof | |
| CN111086081A (en) | Preparation process of fireproof door plate | |
| CN211164393U (en) | Environment-friendly moisture-proof core-board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210330 |