CN116238014A - Preparation method of facing plate - Google Patents

Preparation method of facing plate Download PDF

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Publication number
CN116238014A
CN116238014A CN202310390318.4A CN202310390318A CN116238014A CN 116238014 A CN116238014 A CN 116238014A CN 202310390318 A CN202310390318 A CN 202310390318A CN 116238014 A CN116238014 A CN 116238014A
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CN
China
Prior art keywords
adhesive
substrate
moisture
component
coating
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
Application number
CN202310390318.4A
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Chinese (zh)
Inventor
李新雄
刘辉
张冬明
纵榜佩
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Bonfurt New Materials Co ltd
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Bonfurt New Materials Co ltd
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Filing date
Publication date
Application filed by Bonfurt New Materials Co ltd filed Critical Bonfurt New Materials Co ltd
Priority to CN202310390318.4A priority Critical patent/CN116238014A/en
Publication of CN116238014A publication Critical patent/CN116238014A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
    • 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
    • B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
    • B27K5/0055—Radio-waves, e.g. microwaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/406—Bright, glossy, shiny surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2451/00—Decorative or ornamental articles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

The invention belongs to the technical field of plate processing in facing materials, and provides a preparation method of a facing plate. The invention adopts the infrared irradiation heating mode to permeate the double-component adhesive into the base material, thereby effectively improving the adhesive force of the base material. Meanwhile, after the base material is permeated by the two-component adhesive, the two-component adhesive is not required to be cured, and the moisture curing hot melt adhesive, the pressing decorative film and the laminating protective film can be directly coated without the need of health maintenance time. In addition, the decorative films are attached to the two sides of the facing plate, so that the problem that the two sides of the facing plate are easy to deform in the later period due to uneven stress is further solved, and the effect that the two sides are completely same in color can be achieved. Finally, the preparation method does not use melamine paper, so that the odor of the obtained facing plate is small, and the obtained facing plate can be odorless.

Description

Preparation method of facing plate
Technical Field
The invention relates to the technical field of plate processing in facing materials, in particular to a preparation method of a facing plate.
Background
The facing material is widely applied to the field of home decoration and office decoration, wherein melamine facing boards are materials which are applied more in the decoration process. The melamine facing board is formed by high-temperature pressing and pasting of base materials (such as medium density fiberboard, shaving board, dampproof board, multi-layer solid wood plywood and the like) and melamine impregnated paper, and then UV paint is coated on the melamine paper to provide basic handfeel, gloss and color for the melamine facing board.
At present, most of the facing boards are melamine facing boards, and the preparation process of the facing boards comprises a process of pasting melamine impregnated paper at high temperature and pressure, however, the process can change the water content of a base material, so that the finally obtained melamine facing boards are uneven in stress and easy to deform in later use. Moreover, the curing time of 24-48 hours is required after the melamine paper is attached, so that the time from the base material to the finished product of the melamine veneer is long, and the production of the veneer board cannot be continuously carried out.
Disclosure of Invention
In view of the above, the invention aims to provide a preparation method of facing plates, which has short period and can realize continuous production; and polymer films are attached to the two sides of the facing plate, so that the problem that the two sides of the facing plate are easy to deform in the later stage due to uneven stress is solved.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a facing plate, which comprises the following steps:
heating one surface of the substrate by first infrared irradiation to obtain a pretreated substrate;
coating a double-component adhesive on the infrared irradiation heating surface of the pretreatment substrate, performing second infrared irradiation heating, and forming a first adhesive layer on the surface of the pretreatment substrate to obtain a glue-penetrating substrate;
coating a moisture curing hot melt adhesive, a pressing decorative film and a laminating protective film on the first adhesive layer of the adhesive-penetrating base material in sequence;
and sequentially repeating the first infrared irradiation heating, the coating of the double-component adhesive, the infrared irradiation heating, the coating of the moisture curing hot melt adhesive, the pressing and pasting of the decorative film and the laminating of the protective film on the other surface of the substrate to obtain the facing plate.
Preferably, the substrate comprises a density board, a particle board or a multi-layer board.
Preferably, the temperature of the first infrared irradiation heating is 25-35 ℃ and the time is 20-60 s.
Preferably, the two-component adhesive comprises a bulk epoxy adhesive and/or a polyurethane adhesive; the double-component adhesive comprises a resin component and a curing agent component; the adhesive viscosity of the mixed resin component and curing agent component is 100-10000 Pa.s.
Preferably, the coating times of the double-component adhesive are 1, and the adhesive coating amount is 20-100 g/m 2 。
Preferably, the temperature of the second infrared irradiation heating is 30-60 ℃ and the time is 20-60 s.
Preferably, the conditions for applying the moisture-curable hot melt adhesive include: the glue barrel has 140-160 deg.c, 120-170 deg.c, 5-30 m/min adhering speed and 20-80 g/m glue coating amount 2 The method comprises the steps of carrying out a first treatment on the surface of the The number of coating times was 1.
Preferably, the moisture-curable hot melt adhesive comprises a moisture-curable reactive polyurethane hot melt adhesive.
Preferably, the material of the decorative film comprises PET, PETG, PP, PVC, precoating paper, composite paper or composite film; the thickness of the decorative film is 150-1000 mu m.
The invention also provides the facing board prepared by the preparation method, which comprises a base material, a first adhesive layer and a second adhesive layer which are positioned on two surfaces of the base material, a first moisture curing hot melt adhesive layer positioned on the surface of the first adhesive layer, a second moisture curing hot melt adhesive layer positioned on the surface of the second adhesive layer, a first decorative film positioned on the surface of the first moisture curing hot melt adhesive layer, a second decorative film positioned on the surface of the second moisture curing hot melt adhesive layer, and a first protective film positioned on the surface of the first decorative film and a second protective film positioned on the surface of the second decorative film.
The invention provides a preparation method of a facing plate, which comprises the following steps: heating one surface of the substrate by first infrared irradiation to obtain a pretreated substrate; coating a double-component adhesive on the infrared irradiation heating surface of the pretreatment substrate, performing second infrared irradiation heating, and forming a first adhesive layer on the surface of the pretreatment substrate to obtain a glue-penetrating substrate; coating a moisture curing hot melt adhesive, a pressing decorative film and a laminating protective film on the first adhesive layer of the adhesive-penetrating base material in sequence; and sequentially repeating the first infrared irradiation heating, the coating of the double-component adhesive, the infrared irradiation heating, the coating of the moisture curing hot melt adhesive, the pressing and pasting of the decorative film and the laminating of the protective film on the other surface of the substrate to obtain the facing plate. The invention adopts the infrared irradiation heating mode to permeate the double-component adhesive into the base material, thereby effectively improving the adhesive force of the base material. Meanwhile, after the base material is permeated by the two-component adhesive, the moisture curing hot melt adhesive, the decorative film and the protective film are directly coated and coated, so that the curing time is not required. Compared with the technology of high-temperature pressure pasting melamine impregnated paper in the current market, the technology reduces the procedure of high-temperature pressure pasting maintenance of melamine paper, upgrades the production from intermittent production to continuous production, shortens the construction time, and avoids the defect that the veneer board is easy to deform due to the change of the water content of the base material caused by high-temperature pressure pasting; in addition, the decorative films are attached to the two sides of the facing plate, so that the problem that the two sides of the facing plate are easy to deform in the later period due to uneven stress is further solved, and the effect that the two sides are completely same in color can be achieved. In addition, the preparation method does not use melamine paper, so that the smell of the obtained facing plate is small, and the obtained facing plate can be odorless.
Detailed Description
The invention provides a preparation method of a facing plate, which comprises the following steps:
heating one surface of the substrate by first infrared irradiation to obtain a pretreated substrate;
coating a double-component adhesive on the infrared irradiation heating surface of the pretreatment substrate, performing second infrared irradiation heating, and forming a first adhesive layer on the surface of the pretreatment substrate to obtain a glue-penetrating substrate;
coating a moisture curing hot melt adhesive, a pressing decorative film and a laminating protective film on the first adhesive layer of the adhesive-penetrating base material in sequence;
and sequentially repeating the first infrared irradiation heating, the coating of the double-component adhesive, the infrared irradiation heating, the coating of the moisture curing hot melt adhesive, the pressing and pasting of the decorative film and the laminating of the protective film on the other surface of the substrate to obtain the facing plate.
In the present invention, the raw materials used in the present invention are preferably commercially available products unless otherwise specified.
The invention carries out first infrared irradiation heating on one surface of a substrate to obtain a pretreated substrate.
In the present invention, the substrate preferably comprises a density board, a particle board, or a multi-layer board; the particle board preferably comprises oriented strand board.
In the present invention, before the first infrared irradiation is heated, it is preferable to further include successive light polishing and dust removal. In the present invention, the operations of the light polishing and the dust removal are not particularly limited, and operations well known to those skilled in the art may be employed.
In the present invention, the temperature of the first infrared irradiation heating is preferably 25 to 35 ℃, preferably 30 to 35 ℃, and the time is preferably 20 to 60 seconds, more preferably 30 to 50 seconds; the infrared wavelength is preferably 1000 to 3000nm.
After the pretreated substrate is obtained, the invention coats a double-component adhesive on the infrared irradiation heating surface of the pretreated substrate, carries out second infrared irradiation heating, and forms a first adhesive layer on the surface of the pretreated substrate to obtain the adhesive-permeated substrate.
In the present invention, the two-component adhesive preferably includes a bulk epoxy adhesive and/or a polyurethane adhesive, and the two-component adhesive preferably includes a resin component and a curing agent component; the adhesive viscosity after the resin component and the curing agent component are mixed is preferably 100 to 10000 Pa.s, more preferably 200 to 2000mPa.s. In the present invention, the viscosity refers to a viscosity at 30 ℃.
In the present invention, the epoxy resin in the bulk epoxy adhesive preferably includes one or more of bisphenol a epoxy resins E20, E44, E51, E54. The main body type two-component epoxy adhesive curing agent is preferably an amine/modified amine curing agent.
In the present invention, the resin component in the polyurethane adhesive preferably includes one or more of sorbitol polyether polyol, polypropylene glycol, castor oil and modified castor oil polyol.
In the present invention, the curing agent preferably includes one or more of toluene diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate and polyphenyl polymethylene polyisocyanate, more preferably polyphenyl polymethylene polyisocyanate.
In the present invention, the number of coating times of the coated two-component adhesive is preferably 1, and the coating amount is preferably 20 to 100g/m 2 More preferably 30 to 80g/m 2 Most preferably 40 to 60g/m 2 。
After the pretreated base material is obtained, the first adhesive layer of the adhesive-penetrating base material is sequentially coated with the moisture curing hot melt adhesive, the pressing decorative film and the laminating protective film.
In the present invention, the second infrared irradiation heating conditions include: the infrared wavelength is preferably 1000-3000 nm; the temperature is preferably 30 to 60 ℃, more preferably 30 to 45 ℃, most preferably 33 to 38 ℃, and the time is preferably 20 to 300s, more preferably 30 to 180s, most preferably 60 to 120s.
In the invention, the second infrared irradiation heating is helpful for the two-component adhesive to permeate into the substrate, so as to increase the bonding strength.
After the adhesive-penetrating base material is obtained, the first adhesive layer of the adhesive-penetrating base material is sequentially coated with the moisture curing hot melt adhesive, the pressing decorative film and the laminating protective film.
In the present invention, the moisture-curable reactive hot melt adhesive is preferably a moisture-curable reactive polyurethane hot melt adhesive. In the invention, the moisture-curing reactive polyurethane hot melt adhesive is a flat-type moisture-curing reactive polyurethane hot melt adhesive which is commonly used in the market. Particularly preferably one or more of H.B.Fuller HL 3901, H.B.Fuller HL 3910, TECHNOMELTPUR 6902 and TECHNOMELT PUR 6909.
In the present invention, the number of applications of the moisture-curable hot melt adhesive is preferably 1, and the amount of each application is independently preferably 20 to 80g/m 2 More preferably 30 to 60g/m 2 。
In the present invention, the conditions for applying the moisture-curable hot melt adhesive include: the glue barrel melt glue temperature is preferably 140-160 ℃, more preferably 145-155 ℃ and most preferably 150 ℃; the temperature of the rubber tube is preferably 140-160 ℃, more preferably 145-155 ℃ and most preferably 150 ℃; the roller temperature is preferably 120-170 ℃, more preferably 130-160 ℃, and most preferably 140-150 ℃; the bonding speed is preferably 5 to 30m/min, more preferably 10 to 25m/min, and most preferably 15m/min; the glue coating amount is preferably 25-60 g/m 2 More preferably 30 to 50g/m 2 Most preferably 35 to 40g/m 2 。
In the present invention, the material of the decorative film preferably includes PET, PETG, PP, PVC, precoated paper, composite paper or composite film. In the present invention, the composite paper is preferably commercially available. In the present invention, the thickness of the decorative film is preferably 150 to 1000. Mu.m, more preferably 200 to 800. Mu.m.
In the present invention, the material of the protective film preferably includes one of PVC, PET and PP. In the present invention, the thickness of the protective film is preferably 20 to 30. Mu.m, more preferably 25. Mu.m.
The pressing and laminating protective film of the decorative film provides corresponding hand feeling, luster, texture and pattern effects for the facing plate. The decorative board prepared by the invention has better decorative effect than the existing melamine decorative board.
After the protective film is coated, the invention sequentially repeats the first infrared irradiation heating, the coating of the double-component adhesive, the infrared irradiation heating, the coating of the moisture curing hot melt adhesive, the pressing of the decorative film and the coating of the protective film on the other surface of the base material to obtain the facing plate.
In the present invention, when the other surface of the substrate is processed, it is preferable to turn over the substrate with an automatic plate-turning machine. In the present invention, the repeated operations and parameters are preferably consistent with the above technical solutions, and will not be described again.
The invention also provides the facing board prepared by the preparation method, which comprises a base material, a first adhesive layer and a second adhesive layer which are positioned on two surfaces of the base material, a first moisture curing hot melt adhesive layer positioned on the surface of the first adhesive layer, a second moisture curing hot melt adhesive layer positioned on the surface of the second adhesive layer, a first decorative film positioned on the surface of the first moisture curing hot melt adhesive layer, a second decorative film positioned on the surface of the second moisture curing hot melt adhesive layer, and a first protective film positioned on the surface of the first decorative film and a second protective film positioned on the surface of the second decorative film.
The following describes the preparation method of the facing sheet material provided by the present invention in detail with reference to examples, but they should not be construed as limiting the scope of the invention.
Example 1
A method for preparing a facing sheet material, comprising the steps of:
(1) And (3) lightly polishing and dedusting one surface of the density board by a sander, and then sending the density board into a drying tunnel for first infrared heating surface activation treatment, wherein the temperature of the surface of a base material is controlled to be 30 ℃, and the activation time is controlled to be 60 seconds, so that the pretreated density board is obtained.
(2) Coating a double-component polyurethane adhesive on the surface of the pretreated density board, wherein the resin component of the double-component polyurethane adhesive is prepared from the following materials in parts by weight:
sorbitol polyether polyol YD-600:100
Sorbitol polyether polyol PPG-2000:100
Castor oil: 200
The curing agent is polyphenyl polymethylene polyisocyanate, the resin component and the curing agent are mixed and stirred uniformly according to the weight ratio of 100:50, and the mixed viscosity (30 ℃): 1500mpa s, pot life (30 ℃). 30min, coating weight of 40g/m 2 。
(3) And (3) conveying the density material coated with the double-component polyurethane adhesive into an infrared heating drying tunnel, and carrying out second infrared irradiation heating on the adhesive-coated surface of the density material, wherein the surface temperature is 35 ℃ and the time is 90s, so as to obtain the adhesive-penetrated base material.
(4) Coating a moisture-curable polyurethane hot melt adhesive on the adhesive-permeable substrate, wherein the conditions comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 160 ℃, the laminating speed is 15m/min, and the gluing amount is as follows: 50g/m 2 。
(5) A PET solid film having a thickness of 250 μm was bonded.
(6) A protective film (30 μm thick, PP film) was applied.
(7) Turning over, and repeating the steps (1) - (6) to obtain the facing plate.
Example 2
A method for preparing a facing sheet material, comprising the steps of:
(1) And (3) lightly polishing and dedusting one surface of the density board by a sander, and then sending the density board into a drying tunnel for first infrared heating surface activation treatment, wherein the temperature of the surface of a base material is controlled to be 30 ℃, and the activation time is controlled to be 60 seconds, so that the pretreated density board is obtained.
(2) Coating a two-component polyurethane adhesive (same as in example 1) on the surface of the pretreated density panel, the coating weight was 60g/m 2 。
(3) And (3) conveying the density material coated with the double-component polyurethane adhesive into an infrared heating drying tunnel, and carrying out second infrared irradiation heating on the adhesive-coated surface of the density material, wherein the surface temperature is 35 ℃ and the time is 90s, so as to obtain the adhesive-penetrated base material.
(4) Coating a moisture-curable polyurethane hot melt adhesive on the adhesive-permeable substrate, wherein the conditions comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 160 ℃, the laminating speed is 15m/min, and the gluing amount is as follows: 50g/m 2 。
(5) A PET solid film having a thickness of 250 μm was bonded.
(6) And (3) sticking a protective film: the thickness is 30 mu m, and the PP film is used as the material.
(7) Turning over, and repeating the steps (1) - (6) to obtain the facing plate.
Example 3
A method for preparing a facing sheet material, comprising the steps of:
(1) And (3) lightly polishing and dedusting one surface of the density board by a sander, and then sending the density board into a drying tunnel for first infrared heating surface activation treatment, wherein the temperature of the surface of a base material is controlled to be 30 ℃, and the activation time is controlled to be 60 seconds, so that the pretreated density board is obtained.
(2) Coating a two-component polyurethane adhesive (same as in example 1) on the surface of the pretreated density panel with a coating weight of 80g/m 2 。
(3) And (3) conveying the density material coated with the double-component polyurethane adhesive into an infrared heating drying tunnel, and carrying out second infrared irradiation heating on the adhesive-coated surface of the density material, wherein the surface temperature is 35-38 ℃ and the time is 90s, so as to obtain the adhesive-penetrated base material.
(4) Coating a moisture-curable polyurethane hot melt adhesive on the adhesive-permeable substrate, wherein the conditions comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 160 ℃, the laminating speed is 15m/min, and the gluing amount is as follows: 50g/m 2 。
(5) A PET solid film having a thickness of 250 μm was bonded.
(6) A protective film (30 μm thick, PP film) was applied.
(7) Turning over, and repeating the steps (1) - (6) to obtain the facing plate.
Example 4
A method for preparing a facing sheet material, comprising the steps of:
(1) And (3) lightly polishing and dedusting one surface of the density board by a sander, and then sending the density board into a drying tunnel for first infrared heating surface activation treatment, wherein the temperature of the surface of a base material is controlled to be 30 ℃, and the activation time is controlled to be 60 seconds, so that the pretreated density board is obtained.
(2) Coating a double-component epoxy adhesive on the surface of the pretreated density board, wherein the resin component of the double-component epoxy adhesive adopts E51 epoxy resin, and the curing agent is prepared from the following materials in parts by weight:
polyetheramine D220:80
Isophorone diamine: 20
The resin component and the curing agent are mixed and stirred uniformly according to the weight ratio of 100:30, and the mixing viscosity (30 ℃): 300 mPas, pot life (30 ℃). For 60min, the coating weight is 40g/m 2 。
(3) And (3) conveying the density material coated with the two-component epoxy adhesive into an infrared heating drying tunnel, and carrying out second infrared irradiation heating on the adhesive-coated surface of the density material, wherein the surface temperature is 35 ℃ and the time is 90s, so as to obtain the adhesive-penetrated base material.
(4) Coating a moisture-curable polyurethane hot melt adhesive on the adhesive-permeable substrate, wherein the conditions comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 160 ℃, the laminating speed is 15m/min, and the gluing amount is as follows: 50g/m 2 。
(5) A PET solid film having a thickness of 250 μm was bonded.
(6) A protective film (30 μm thick, PP film) was applied.
(7) Turning over, and repeating the steps (1) - (6) to obtain the facing plate.
Example 5
A method for preparing a facing sheet material, comprising the steps of:
(1) And (3) lightly polishing and dedusting one surface of the density board by a sander, and then sending the density board into a drying tunnel for first infrared heating surface activation treatment, wherein the temperature of the surface of a base material is controlled to be 30 ℃, and the activation time is controlled to be 60 seconds, so that the pretreated density board is obtained.
(2) Coating a two-component epoxy adhesive (same as in example 4) on the surface of the pretreated density panel, the coating weight was 60g/m 2 。
(3) And (3) conveying the density material coated with the two-component epoxy adhesive into an infrared heating drying tunnel, and carrying out second infrared irradiation heating on the adhesive-coated surface of the density material, wherein the surface temperature is 38 ℃ and the time is 90s, so as to obtain the adhesive-penetrated base material.
(4) Coating a moisture-curable polyurethane hot melt adhesive on the adhesive-permeable substrate, wherein the conditions comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 160 ℃, the laminating speed is 15m/min, and the gluing amount is as follows:50g/m 2 。
(5) A PET solid film having a thickness of 250 μm was bonded.
(6) And (3) sticking a protective film: the thickness is 30 mu m, and the PP film is used as the material.
(7) Turning over, and repeating the steps (1) - (6) to obtain the facing plate.
Example 6
A method for preparing a facing sheet material, comprising the steps of:
(1) And (3) lightly polishing and dedusting one surface of the density board by a sander, and then sending the density board into a drying tunnel for first infrared heating surface activation treatment, wherein the temperature of the surface of a base material is controlled to be 30 ℃, and the activation time is controlled to be 60 seconds, so that the pretreated density board is obtained.
(2) Coating a two-component epoxy adhesive (same as in example 4) on the surface of the pretreated density panel with a coating weight of 80g/m 2 。
(3) And (3) conveying the density material coated with the two-component epoxy adhesive into an infrared heating drying tunnel, and carrying out second infrared irradiation heating on the adhesive-coated surface of the density material, wherein the surface temperature is 35-38 ℃ and the time is 90s, so as to obtain the adhesive-penetrated base material.
(4) Coating a moisture-curable polyurethane hot melt adhesive on the adhesive-permeable substrate, wherein the conditions comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 160 ℃, the laminating speed is 15m/min, and the gluing amount is as follows: 50g/m 2 。
(5) A PET solid film having a thickness of 250 μm was bonded.
(6) A protective film (30 μm thick, PP film) was applied.
(7) Turning over, and repeating the steps (1) - (6) to obtain the facing plate.
Comparative example 1
A method for preparing a facing sheet material, comprising the steps of:
(1) The melamine paper is pressed and stuck on the density board in a hot pressing and sticking mode to obtain the density board stuck with the melamine paper, the temperature of the hot pressing and sticking is 140 ℃, the pressure is 3.5MPa, and the time for pressing and sticking the melamine paper on the density board is 12s. After the melamine paper is pressed and stuck on the density board, wet cotton cloth with the water content of 12% is used for covering the surface of the melamine paper for health care treatment for 24 hours, and the melamine pressing and sticking board is obtained.
(2) Heating the substrate, coating PUR glue, wherein the coating parameters comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 155 ℃, the bonding speed is 12m/min, and the glue coating amount is 60g/m 2 。
(3) A PET solid film having a thickness of 250 μm was bonded.
(4) A protective film (with a thickness of 20 μm and a material of PP) was applied.
(5) Turning over, and repeating the steps (1) - (4) to obtain the double-sided veneer board.
Comparative example 2
A method for preparing a facing sheet material, comprising the steps of:
(1) The melamine paper is pressed and stuck on the density board in a hot pressing and sticking mode to obtain the density board stuck with the melamine paper, the temperature of the hot pressing and sticking is 140 ℃, the pressure is 3.5MPa, and the time for pressing and sticking the melamine paper on the density board is 12s. After the melamine paper is pressed and stuck on the density board, wet cotton cloth with the water content of 12% is used for covering the surface of the melamine paper for health care treatment for 24 hours, and the melamine pressing and sticking board is obtained.
(2) Heating the substrate, coating PUR glue, wherein the coating parameters comprise: the temperature of the glue melting of the glue barrel is 150 ℃; the temperature of the rubber tube is 155 ℃; the roller temperature is 155 ℃, the bonding speed is 12m/min, and the glue coating amount is 60g/m 2 。
(3) A PET solid film having a thickness of 250 μm was bonded.
(4) A protective film (with a thickness of 20 μm and a material of PP) was applied.
The preparation processes of the facing plates of examples 1 to 3 and comparative example 1 were evaluated, and the resulting facing plates were subjected to performance tests, in which: the reference standard of the peeling strength is GB/T2790-1995 180 DEG peeling strength test method of adhesive, the reference standard of the glossiness is 20 DEG, 60 DEG and 85 DEG specular gloss measurement of GB/T9754-2007 colored paint and colored paint film of the varnish without metal pigment, the reference standard of the heating warping property test is GB/T4085-2015 semi-rigid PVC block floor, the reference standard of the smell is GB/T35773-2017 packaging material and evaluation of product smell, and the test result is shown in Table 1.
Table 1 performance evaluation
Figure BDA0004177819800000101
Figure BDA0004177819800000111
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (10)

1. A method for preparing a facing sheet material, comprising the steps of:
heating one surface of the substrate by first infrared irradiation to obtain a pretreated substrate;
coating a double-component adhesive on the infrared irradiation heating surface of the pretreatment substrate, performing second infrared irradiation heating, and forming a first adhesive layer on the surface of the pretreatment substrate to obtain a glue-penetrating substrate;
coating a moisture curing hot melt adhesive, a pressing decorative film and a laminating protective film on the first adhesive layer of the adhesive-penetrating base material in sequence;
and sequentially repeating the first infrared irradiation heating, the coating of the double-component adhesive, the infrared irradiation heating, the coating of the moisture curing hot melt adhesive, the pressing and pasting of the decorative film and the laminating of the protective film on the other surface of the substrate to obtain the facing plate.
2. The method of claim 1, wherein the substrate comprises a density board, a particle board, or a multi-layer board.
3. The method according to claim 1 or 2, wherein the first infrared irradiation is performed at a temperature of 25 to 35 ℃ for 20 to 60 seconds.
4. The method of claim 1, wherein the two-component adhesive comprises a bulk epoxy adhesive and/or a polyurethane adhesive; the double-component adhesive comprises a resin component and a curing agent component; the adhesive viscosity of the mixed resin component and curing agent component is 100-10000 Pa.s.
5. The method according to claim 1 or 4, wherein the number of applications of the two-component adhesive is 1, and the amount of the adhesive is 20 to 100g/m 2 。
6. The method according to claim 1 or 4, wherein the second infrared irradiation is performed at a temperature of 30 to 60 ℃ for 20 to 60 seconds.
7. The method of claim 1, wherein the conditions for applying the moisture curable hot melt adhesive comprise: the glue melting temperature of the glue barrel is 140-160 ℃, the temperature of the glue tube is 140-160 ℃, the temperature of the roller is 120-170 ℃, the bonding speed is 5-30 m/min, and the glue coating amount is 20-80 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The number of coating times was 1.
8. The method of making according to claim 1 or 7, wherein the moisture-curable hot melt adhesive comprises a moisture-curable reactive polyurethane hot melt adhesive.
9. The method according to claim 1, wherein the decorative film comprises PET, PETG, PP, PVC, precoating paper, composite paper or composite film; the thickness of the decorative film is 150-1000 mu m.
10. The facing sheet material prepared by the preparation method of any one of claims 1 to 9, wherein the facing sheet material comprises a substrate, a first adhesive layer and a second adhesive layer on two surfaces of the substrate, a first moisture-curable hot-melt adhesive layer on the surface of the first adhesive layer and a second moisture-curable hot-melt adhesive layer on the surface of the second adhesive layer, a first decorative film on the surface of the first moisture-curable hot-melt adhesive layer and a second decorative film on the surface of the second moisture-curable hot-melt adhesive layer, and a first protective film on the surface of the first decorative film and a second protective film on the surface of the second decorative film.
CN202310390318.4A 2023-04-12 2023-04-12 Preparation method of facing plate Pending CN116238014A (en)

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