CN113334511B - Production process of decorative special-shaped density board - Google Patents

Production process of decorative special-shaped density board Download PDF

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Publication number
CN113334511B
CN113334511B CN202110609680.7A CN202110609680A CN113334511B CN 113334511 B CN113334511 B CN 113334511B CN 202110609680 A CN202110609680 A CN 202110609680A CN 113334511 B CN113334511 B CN 113334511B
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box body
special
test piece
decorative film
shaped density
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CN113334511A (en
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高静
马晓侠
严亮
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Zhejiang Shiruiqi Carbon Technology Co ltd
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Zhejiang Shiruiqi Carbon Technology Co ltd
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    • 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
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention provides a production process of a decorative special-shaped density board, which comprises the following steps: firstly, rolling and brushing a primer on the side of a special-shaped density board to be subjected to plastic suction molding, then placing the special-shaped density board on a lower box body jig board, then pasting a decorative film coated with an adhesive at the middle position of an upper box body and a lower box body, closing the upper box body and the lower box body, vacuumizing and heating, and finally jacking the jig board of the lower box body after the lower box body and the upper box body reach a certain pressure intensity, and keeping dynamic pressure difference between the upper box body and the lower box body to finish the pasting of the special-shaped density board. According to the invention, by maintaining the dynamic pressure difference in the coating forming process of the decorative film and the special-shaped density board, the special-shaped parts with the depth of less than one third of the width can be coated, the mechanical strength of the special-shaped density board cannot be damaged in the coating process, and in addition, the folds generated on the surface of the decorative film in the forming process can be effectively removed in the dynamic pressure difference mode, so that the yield of the decorative special-shaped density board is improved.

Description

Production process of decorative special-shaped density board
Technical Field
The invention relates to the technical field of special-shaped plate surface coating, in particular to a production process of a decorative special-shaped density plate.
Background
In recent years, with the development of the customized furniture industry, the demand of consumers for personalized decoration is more and more vigorous, and especially the fashion sense brought by the special-shaped decoration is more and more pursued in the young generation, so the design of the special-shaped model is more and more popular in the furniture industry. In order to improve the decorative effect of the special-shaped density board, decorative films with different patterns are coated on the surface of the special-shaped density board. At present, for the substrate of the special-shaped density board, the surface of a decorative film is mostly coated with glue, and the coated decorative film is attached to the special-shaped density board, so that different decorative effects are given to the special-shaped density board.
As is known, due to the unique structure of the special-shaped density board, the decorative film and the special-shaped density board are not flat, the pressure difference during molding needs to be increased, the bonding effect between the decorative film and the special-shaped density board can be improved, but after the high pressure difference is maintained for a long time, the mechanical strength of the special-shaped density board is easily damaged, and the later service life of the special-shaped density board is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a production process of a decorative special-shaped density board, by adopting the process, the decorative film can be used for coating the special-shaped density board with a complex surface shape, and the mechanical strength of the special-shaped density board cannot be influenced.
The invention provides a production process of a decorative special-shaped density board, which comprises the following steps:
(A) The method comprises the following steps Rolling and brushing a primer on the side edge of the special-shaped density board to be subjected to plastic sucking molding, wherein the thickness of the primer is 3-10 mu m;
(B) The method comprises the following steps Placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, then attaching a decorative film coated with an adhesive to the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.05 KPa-0.4 KPa, and then heating at 60-180 ℃ for 30-200 s;
(C) The method comprises the following steps Keeping the pressure in the lower box body at 0.05-0.4 KPa, pressurizing the upper box body to 101-300 KPa, simultaneously jacking the jig plate of the lower box body, then relieving the pressure of the upper box body at the speed of 0-10 KPa/s until the pressure of the upper box body is 101KPa, and pressurizing the lower box body to 101KPa at the speed of 3-10 KPa/s until the pressure of the upper box body is 101KPa, thereby finishing the bonding of the decorative film on the special-shaped density board.
Preferably, in the step (B), the adhesive is coated on the surface of the decorative film by blade coating, and is heated at 40-75 ℃ for 3-20 min.
Preferably, in the step (B), infrared heating with a wavelength of 2 to 4 μm is used.
Preferably, in the step (B), the thickness of the adhesive is 10 to 200 μm.
Preferably, in the step (B), the adhesive is selected from one or more of polyurethane, acrylic acid and silicone.
Preferably, the elongation of the decorative film is 50% to 300%.
Preferably, in the step (B), the adhesive is coated on the surface of the decorative film by blade coating, and is heated at 50-60 ℃ for 5-10 min.
Preferably, in the step (a), the primer is selected from one or more of polyamide, polyurethane and epoxy resin.
Preferably, in the step (B), the treatment conditions are selected from 0.1KPa to 0.2KPa, and then the mixture is heated at the temperature of between 80 and 120 ℃ for 50 to 100 seconds;
preferably, in the step (C), the lower box body is kept at 0.1 KPa-0.2 KPa, the upper box body is pressurized to 120 KPa-180 KPa, meanwhile, the jig plate of the lower box body is jacked up, then the upper box body is depressurized at the rate of 1.2 KPa/s-6 KPa/s, and until the pressure of the upper box body is 101KPa, the lower box body is pressurized to 101KPa at the rate of 4 KPa/s-6 KPa/s, so that the decoration film is attached to the special-shaped density board.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the method, the dynamic pressure difference of the upper box body and the lower box body in the coating forming process of the decorative film and the special-shaped density boards is kept, the phenomenon that the surface of the decorative film is wrinkled due to overlarge pressure difference can be avoided, in addition, under the action of the dynamic pressure difference, the decorative film can effectively coat the special-shaped density boards with the depth within one third of the width, and the mechanical strength of the special-shaped density boards cannot be damaged;
2. the primer is brushed on the side edge of the special-shaped density board in a rolling manner, so that the bonding strength between the side edge of the special-shaped density board and the decorative film can be improved, the decorative film on the side edge of the special-shaped density board is prevented from being warped, and the quality of the special-shaped density board is improved;
3. the decorative film is coated with glue in a blade coating mode, the utilization rate of the adhesive can be improved, the adhesive film is heated in an infrared mode, the infrared heat transfer mode is radiation heat transfer, energy is transferred by electromagnetic waves, compared with the traditional heating mode, a heating medium is not needed, heat energy can be directly transferred to the adhesive film in a radiation mode, and the utilization rate of heat efficiency is high; secondly, infrared heating has certain penetrability, infrared rays can penetrate through the adhesive film to reach a certain depth, molecules in the depth absorb infrared light and are heated from inside to outside at the same time, the heating speed is high, and the phenomenon that the adhesive is sealed on the surface of the decorative film to cause peeling bubbles is avoided to a great extent; in addition, the heat convection generated by the traditional heating mode easily blows impurities such as dust and the like to the surface of the adhesive film to influence the quality of the adhesive film, and the infrared heating mode cannot cause the problem; the color difference before and after the surface of the decorative film is heated is small, the glossiness is high, the color difference delta E is a, the b value is 1-5, and the glossiness delta G value is 2-8.
The thickness of the primer roller brush in the step (A) is less than 3 mu m, and the primer cannot completely fill the side pores between the special-shaped density board and the decorative film, so that the side bonding strength is influenced; the thickness of the primer roller brush is more than 10 mu m, the cohesive force of the primer is insufficient, and the bonding strength after thermal aging is influenced;
heating the decorative film after gluing in the step (B), wherein the heating temperature is less than 40 ℃, the drying efficiency is too low, the production cost is high, and the feasibility of mass production is not realized; the heating temperature is higher than 75 ℃, the decorative film is easy to deform, and the later-stage use is influenced;
in the step (B), the vacuum degree is less than 0.05KPa, and the precision of the current equipment cannot be reached; the vacuum degree is more than 0.4KPa, the pressure difference during forming is influenced, and the bonding strength is further influenced; the molding temperature is higher than 180 ℃, the decorative film is excessively softened, and wrinkles are easy to appear during coating; the molding temperature is less than 60 ℃, the decorative film is not fully softened, the stretching amount is small, and the special-shaped density board cannot be coated.
In the step (B), the wavelength of infrared heating is less than 2 μm, the heating efficiency is too high, the heat absorption of the adhesive film is insufficient, the adhesive film cannot be sufficiently softened, the stretchability of the adhesive film is reduced, and the special-shaped density board cannot be coated; if the infrared wavelength is greater than 4 μm, the heating time is long, the heating efficiency is low, destructive defects can be caused on the surface of the polymer decorative film, the glossiness and texture of the surface of the decorative film can be lost, and the decorative effect of the decorative film can be reduced.
Step (C), pressurizing the upper box body to be less than 101KPa, influencing the pressure difference during molding, ensuring that the decorative film cannot cover the special-shaped density board, and ensuring the bonding strength between the decorative film and the special-shaped density board; the pressurization of the upper box body is more than 300KPa, and the equipment precision can not be reached. The upper box body is decompressed at a rate of more than 10KPa/s, so that the decompression rate of the upper box body is too high, the infiltration time of the adhesive on the decorative film is not enough, and the bonding strength between the decorative film and the special-shaped density board is influenced. The lower box body is pressurized to 101KPa at the speed of less than 3KPa/s, the pressurizing time is too long, the production efficiency is low, the cost is high, and the appearance gloss of the decorative film can be lost in the long-time pressurizing process. The lower box body is pressurized to 101KPa at the speed of more than 10KPa/s, the pressurization time is short, and the upper box body between the upper box body and the lower box body adopts a dynamic balance pressurization mode, so that wrinkles generated on the surface of a decorative film during molding can be effectively removed, and the yield of the decorative special-shaped density board is improved.
Drawings
FIG. 1 shows a profile board coated with a PVC decorative film obtained in example 1 of the present invention.
Detailed Description
For a further understanding of the present invention, the following preferred embodiments of the present invention are described in conjunction with the examples, but it is to be understood that these descriptions are intended to further illustrate the features and advantages of the present invention, and not to limit the claims, and that the decorative films of the present invention are PVC decorative films.
Example 1
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing bottom coating agent polyamide with the thickness of 3 mu m on the side edge of the special-shaped density plate to be subjected to plastic sucking molding;
(B) The method comprises the following steps Placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, then coating adhesive polyurethane on the surface of a decorative film in a blade mode, wherein the thickness of the adhesive polyurethane is 10 micrometers, and heating the adhesive polyurethane at 40 ℃ for 20min to obtain a coated decorative film, wherein the elongation of the decorative film is 50%; then pasting the glued decorative film at the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.05KPa, heating by adopting the infrared wavelength of 2-4 mu m, heating for 200s after the temperature is raised to 60 ℃;
(C) The method comprises the following steps The lower box body keeps 0.05KPa, the upper box body is pressurized to 101KPa, and simultaneously the jig plate of the lower box body is jacked up, and the lower box body is pressurized to 101KPa at the speed of 3KPa/s, so that the fitting of the decorative film on the special-shaped density plate is completed.
As shown in fig. 1, the bonding effect was good.
The groove width of the surface of the special-shaped density plate is 50mm, the depth of the groove is 10mm, the special-shaped density plate is completely coated, and the attaching effect is good.
And (3) impact resistance test: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, the special-shaped density board coated with the decorative film is adhered to a shaving board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, the test piece and the shaving board can be clamped by using a test piece clamp, and if the thickness is more than 5mm, the shaving board does not need to be supported; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7 days; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball which is 60mm away from the surface of the test piece, has the diameter of 42.8 +/-0.2 mm and the mass of 324 +/-5.0 g and is undamaged on the surface of the test piece, and recording whether cracks appear on the surface of the test piece. The surface of the decorative shaped density plate prepared in this example was crack-free.
Side surface gluing strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N), to the nearest 10N. Specimen surface bonding strength σ = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.4MPa.
And (3) color difference test of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 2.
And (3) testing the glossiness: using black glass as reference plate with perfect polishing, refractive index of 1.567 at wavelength of 587.6nmThe gloss value is specified as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the gloss plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the gloss as G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 4GU.
Example 2
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing bottom coating agent polyamide on the side edge of the special-shaped density board to be subjected to plastic suction molding, wherein the thickness is 3 mu m;
(B) The method comprises the following steps Placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, spraying adhesive polyurethane to the surface of a decorative film, wherein the thickness of the adhesive is 10 micrometers, attaching the coated decorative film to the middle position of an upper box body and a lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.05KPa, heating by adopting 2-4 micrometers of infrared wavelength, raising the temperature to 60 ℃, and heating for 200s;
(C) The method comprises the following steps The pressure in the lower box body is kept at 0.05KPa, the upper box body is pressurized to 101KPa, and simultaneously, the jig plate of the lower box body is jacked up, and the lower box body is pressurized to 101KPa at the speed of 5KPa/s, so that the decoration film is attached to the special-shaped density plate.
The width of the groove on the surface of the special-shaped density plate is 50mm, the depth of the groove is 10mm, the decorative film is completely coated, and the attaching effect is good.
And (3) impact resistance test: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative shaped density plate prepared in this example was crack-free.
Side surface gluing strength test method: the surface of a test piece is polished by fine sand paper, and a room temperature curing adhesive or a molten hot melt adhesive is uniformly coated on the surfaces of 2 special tools with the surfaces of 20 multiplied by 20mm T-shaped metals and respectively adhered to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the special T-shaped metal tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N), to the nearest 10N. Specimen surface bonding strength σ = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.4MPa.
And (3) color difference test of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b The difference in color between the coated decorative film and the original decorative film, Δ E, is characterized in this way a,b Is 3.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 7GU.
Example 3
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Rolling and brushing polyurethane serving as a primer on the side edge of the special-shaped density board to be subjected to plastic suction molding, wherein the thickness of the polyurethane is 6 micrometers;
(B) The method comprises the following steps Then placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, coating an adhesive acrylic acid on the surface of the decorative film in a scraping mode, wherein the thickness of the adhesive acrylic acid is 200 mu m, and heating the decorative film at 120 ℃ for 30s, wherein the elongation of the decorative film is 300%; then pasting the glued decorative film on the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.4KPa, heating by adopting the infrared wavelength of 2-4 mu m, heating for 100s after the temperature is increased to 180 ℃;
(C) The method comprises the following steps And keeping the pressure in the lower box body at 0.4KPa, pressurizing the upper box body to 300KPa, simultaneously jacking a jig plate of the lower box body, then relieving the pressure of the upper box body at the speed of 10KPa/s until the pressure of the upper box body is 101KPa, pressurizing the lower box body to 101KPa at the speed of 10KPa/s, and finishing the lamination of the decorative film on the special-shaped density plate.
The groove on the surface of the special-shaped density plate has the width of 50mm and the depth of 12.5mm, and the special-shaped density plate is completely coated and has good bonding effect.
And (3) impact resistance test: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball which is 60mm away from the surface of the test piece, has the diameter of 42.8 +/-0.2 mm and the mass of 324 +/-5.0 g and is undamaged on the surface of the test piece, and recording whether cracks appear on the surface of the test piece. The surface of the decorative shaped density plate prepared in this example was crack-free.
Side surface bonding strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N), to the nearest 10N. Test piece surface bonding strength sigma = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.5MPa.
And (3) testing the color difference of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b The difference in color between the coated decorative film and the original decorative film, Δ E, is characterized in this way a,b Is 1.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the glossiness of the original membrane is represented by the delta G of 5GU.
Example 4
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing primer epoxy resin with the thickness of 10 mu m on the side edge of the special-shaped density board to be subjected to plastic suction molding;
(B) The method comprises the following steps Then placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, then mixing an adhesive polyurethane and acrylic acid according to a mass ratio of 1; then pasting the glued decorative film at the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.2KPa, heating by adopting the infrared wavelength of 2-4 mu m, heating for 150s after the temperature is raised to 120 ℃;
(C) The method comprises the following steps And keeping the pressure in the lower box body at 0.3KPa, pressurizing the upper box body to 150KPa, simultaneously jacking a jig plate of the lower box body, then relieving the pressure of the upper box body at the speed of 2KPa/s until the pressure of the upper box body is 101KPa, pressurizing the lower box body to 101KPa at the speed of 6KPa/s, and finishing the lamination of the decorative film on the special-shaped density plate.
The groove width of the surface of the special-shaped density plate is 50mm, the depth is 15mm, the special-shaped density plate is completely coated, and the attaching effect is good.
And (3) testing the impact resistance: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative shaped density plate prepared in this example was crack-free.
Side surface gluing strength test method: polishing the surface of the test piece with fine sand paper, and uniformly coating the room temperature curing adhesive or the melted hot melt adhesive on 2 surfacesThe surface of a special tool for 20X 20mmT type metal is respectively adhered to the center of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N) to the nearest 10N. Specimen surface bonding strength σ = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.4MPa.
And (3) color difference test of the decorative film: performing black-white calibration on a color difference instrument, adopting a CIELAB value method, firstly testing the L, a and b values of the original decorative film, taking the values as standard samples, secondly testing the L ', a ' and b ' of the coated decorative film, and finally calculating delta E a,b The difference in color between the coated decorative film and the original decorative film, Δ E, is characterized in this way a,b Is 4.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 Secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 6GU.
Example 5
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing a primer on the side edge of the special-shaped density plate to be subjected to plastic suction molding, wherein the primer is prepared by mixing polyurethane and epoxy resin according to a mass ratio of 1;
(B) The method comprises the following steps Then placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, then coating an adhesive organic silicon on the surface of a decorative film in a blade mode, wherein the thickness of the decorative film is 15 micrometers, and heating the decorative film at 50 ℃ for 5min, wherein the elongation of the decorative film is 80%; then the glued decorative film is pasted in the middle position of the upper box body and the lower box body, the upper box body and the lower box body are closed, then the vacuum degree is pumped until the vacuum degree reaches 0.1KPa, the infrared wavelength of 2-4 mu m is adopted for heating, the temperature is increased to 80 ℃, and then the heating is carried out for 50s;
(C) The method comprises the following steps And keeping the pressure in the lower box body at 0.1KPa, pressurizing the upper box body to 120KPa, simultaneously jacking a jig plate of the lower box body, then relieving the pressure of the upper box body at the speed of 5KPa/s until the pressure of the upper box body is 101KPa, pressurizing the lower box body to 101KPa at the speed of 5KPa/s, and finishing the lamination of the decorative film on the special-shaped density plate.
The groove width of the surface of the special-shaped density plate is 50mm, the depth of the groove is 10mm, the special-shaped density plate is completely coated, and the attaching effect is good.
And (3) testing the impact resistance: the method comprises the following steps of (1) impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, the special-shaped density board coated with the decorative film is adhered to a shaving board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, the test piece and the shaving board can be clamped by using a test piece clamp, and if the thickness is more than 5mm, the shaving board does not need to be supported; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7 days; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative shaped density plate prepared in this example was crack-free.
Side surface bonding strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is smallBonding a square steel plate with the thickness of 10mm and the side length of 50mm to the back of the test piece by using room temperature curing adhesive or hot melt adhesive at the position of 8mm to play a role in reinforcement; fixing the test piece bonded with the special T-shaped metal tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N), to the nearest 10N. Test piece surface bonding strength sigma = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.6MPa.
And (3) color difference test of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b The difference in color between the coated decorative film and the original decorative film, Δ E, is characterized in this way a,b Is 1.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 2GU.
Example 6
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing a primer on the side edge of the special-shaped density plate to be subjected to plastic suction molding, wherein the primer is prepared by mixing polyamide and epoxy resin according to a mass ratio of 1;
(B) The method comprises the following steps Then placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, then mixing an adhesive, namely organic silicon and acrylic acid according to a mass ratio of 2; then pasting the glued decorative film at the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.2KPa, heating by adopting the infrared wavelength of 2-4 mu m, heating for 100s after the temperature is raised to 120 ℃;
(C) The method comprises the following steps And keeping the pressure in the lower box body at 0.2KPa, pressurizing the upper box body to 180KPa, simultaneously jacking a jig plate of the lower box body, then relieving the pressure of the upper box body at the rate of 3KPa/s until the pressure of the upper box body is 101KPa, and pressurizing the lower box body to 101KPa at the rate of 3KPa/s to complete the lamination of the decorative film on the special-shaped density plate.
The groove on the surface of the special-shaped density plate has the width of 50mm and the depth of 12.5mm, and the special-shaped density plate is completely coated and has good bonding effect.
And (3) impact resistance test: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, the special-shaped density board coated with the decorative film is adhered to a shaving board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, the test piece and the shaving board can be clamped by using a test piece clamp, and if the thickness is more than 5mm, the shaving board does not need to be supported; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7 days; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative special-shaped density board prepared by the embodiment has no cracks.
Side surface gluing strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using room temperature curing adhesive or hot melt adhesive to play a role in enhancingUsing; fixing the test piece bonded with the special T-shaped metal tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N), to the nearest 10N. Specimen surface bonding strength σ = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.7MPa.
And (3) color difference test of the decorative film: performing black-white calibration on a color difference instrument, adopting a CIELAB value method, firstly testing the L, a and b values of the original decorative film, taking the values as standard samples, secondly testing the L ', a ' and b ' of the coated decorative film, and finally calculating delta E a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 3.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the gloss plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the gloss as G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 4GU.
Example 7
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing a primer on the side edge of the special-shaped density plate to be subjected to plastic suction molding, wherein the primer is prepared from polyamide, carbamate and epoxy resin according to a mass ratio of 2:1:1, mixing to obtain the product with the thickness of 3 mu m;
(B) The method comprises the following steps Then placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, mixing an adhesive polyurethane, acrylic acid and organic silicon according to a mass ratio of 1; then pasting the glued decorative film at the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.15KPa, heating by adopting the infrared wavelength of 2-4 mu m, heating for 80s after the temperature is raised to 100 ℃;
(C) The method comprises the following steps And keeping the pressure in the lower box body at 0.15KPa, pressurizing the upper box body to 150KPa, simultaneously jacking a jig plate of the lower box body, then relieving the pressure of the upper box body at the rate of 8KPa/s until the pressure of the upper box body is 101KPa, and pressurizing the lower box body to 101KPa at the rate of 8KPa/s to complete the lamination of the decorative film on the special-shaped density plate.
The groove width of the surface of the special-shaped density plate is 50mm, the depth is 15mm, the special-shaped density plate is completely coated, and the laminating effect is good.
And (3) impact resistance test: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, the special-shaped density board coated with the decorative film is adhered to a shaving board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, the test piece and the shaving board can be clamped by using a test piece clamp, and if the thickness is more than 5mm, the shaving board does not need to be supported; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Then clamping the decorative film surface of the test piece upwards in a frame type fixture and placing the fixture on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative shaped density plate prepared in this example was crack-free.
Side surface bonding strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the special tool for the T-shaped metal on a universal mechanical testing machine, wherein the side surface of the test piece bonded with the special tool for the T-shaped metal is arranged on the side surface of the universal mechanical testing machineUniformly loading in the vertical direction, breaking the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N), to the nearest 10N. Test piece surface bonding strength sigma = Fmax A, to the nearest 0.01MPa, where A is the area of the specimen bonded to the chuck, and A =400mm 2 . The side surface bonding strength test result is as follows: 0.6MPa.
And (3) color difference test of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 2.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 Secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 4GU.
Example 8
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing a primer on the side edge of the special-shaped density plate to be subjected to plastic suction molding, wherein the primer is prepared from polyamide, carbamate and epoxy resin according to a mass ratio of 1:1:1, mixing to obtain the product with the thickness of 5 mu m;
(B) The method comprises the following steps Then placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, mixing an adhesive polyurethane, acrylic acid and organic silicon according to a mass ratio of 1; then the glued decorative film is pasted in the middle position of the upper box body and the lower box body, the upper box body and the lower box body are closed, then the vacuum degree is pumped until the vacuum degree reaches 0.15KPa, the infrared wavelength of 2-4 mu m is adopted for heating, the temperature is increased to 100 ℃, and then the heating is carried out for 80s;
(C) The method comprises the following steps And keeping the pressure in the lower box body at 0.15KPa, pressurizing the upper box body to 150KPa, simultaneously jacking a jig plate of the lower box body, then relieving the pressure of the upper box body at the speed of 10KPa/s until the pressure of the upper box body is 101KPa, pressurizing the lower box body to 101KPa at the speed of 5KPa/s, and finishing the lamination of the decorative film on the special-shaped density plate.
The groove width of the surface of the special-shaped density plate is 50mm, the depth is 15mm, the special-shaped density plate is completely coated, and the attaching effect is good.
And (3) testing the impact resistance: the method comprises the following steps of (1) impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative special-shaped density board prepared by the embodiment has no cracks.
Side surface bonding strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, cutting off the decorative layer along the periphery of the T block, and cutting the decorative layer to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the special T-shaped metal tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N), to the nearest 10N. Specimen surface bonding strength σ = Fmax A, to the nearest 0.01MPa, where A is the area of the specimen bonded to the chuck, and A =400mm 2 . The side surface bonding strength test result is as follows: 0.6MPa.
And (3) color difference test of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 1.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the glossiness of the original membrane is represented by the difference, and the Delta G is 3GU.
Comparative example 1
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Placing the special-shaped density board to be coated on a jig board, then coating adhesive polyurethane on the surface of the decorative film in a blade mode, wherein the thickness of the special-shaped density board is 10 micrometers, and heating the special-shaped density board at 40 ℃ for 20min, wherein the elongation of the decorative film is 50%; placing the glued decorative film on the surface of the special-shaped density board, and heating for 200s at 60 ℃;
(B) The method comprises the following steps And pressurizing the upper box body to 100KPa, and keeping for 300s to finish the bonding of the special-shaped density boards.
The width of the groove on the surface of the special-shaped density board is 50mm, the depth of the groove is 10mm, the decorative film does not completely cover the special-shaped density board, and the attaching effect is poor.
And (3) impact resistance test: the method comprises the following steps of (1) impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, the special-shaped density board coated with the decorative film is adhered to a shaving board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, the test piece and the shaving board can be clamped by using a test piece clamp, and if the thickness is more than 5mm, the shaving board does not need to be supported; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7 days; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative special-shaped density plate prepared by the comparative example is cracked.
Side surface bonding strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, cutting off the decorative layer along the periphery of the T block, and cutting the decorative layer to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N) to the nearest 10N. Test piece surface bonding strength σ = F max A, to the nearest 0.01MPa, where A is the area of the specimen bonded to the chuck, and A =400mm 2 . The side surface bonding strength test result is as follows: 0.1MPa.
And (3) testing the color difference of the decorative film: performing black-white calibration on a color difference instrument, adopting a CIELAB value method, firstly testing the L, a and b values of the original decorative film, taking the values as standard samples, secondly testing the L ', a ' and b ' of the coated decorative film, and finally calculating delta E a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 10.
And (3) testing the glossiness: using black glass with perfect polishing as a reference plate at the wavelengthThe value of the gloss at a refractive index of 1.567 at 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 Secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 17GU.
Comparative example 2:
a production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Placing the special-shaped density board to be coated on a jig board, then coating adhesive polyurethane on the surface of the decorative film in a blade mode, wherein the thickness of the polyurethane is 200 mu m, and heating the polyurethane at 120 ℃ for 30s to obtain the decorative film, wherein the elongation of the decorative film is 300%; placing the glued decorative film on the surface of the special-shaped density board, and then heating for 100s at 180 ℃;
(B) The method comprises the following steps And pressurizing the upper box body to 300KPa, keeping for 30s, and simultaneously jacking the jig plate of the lower box body to complete the lamination of the special-shaped density plate.
The groove width of the surface of the special-shaped density board is 50mm, the depth is 12.5mm, the decorative film does not completely coat the special-shaped density board, and the attaching effect is poor.
And (3) impact resistance test: the method comprises the following steps of (1) impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Then clamping the decorative film surface of the test piece upwards in a frame type fixture and placing the fixture on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball which is 60mm away from the surface of the test piece, has the diameter of 42.8 +/-0.2 mm and the mass of 324 +/-5.0 g and is undamaged on the surface of the test piece, and recording whether cracks appear on the surface of the test piece. The surface of the decorative special-shaped density plate prepared by the comparative example is cracked.
Side surface gluing strength test method: the surface of a test piece is polished by fine sand paper, and a room temperature curing adhesive or a molten hot melt adhesive is uniformly coated on the surfaces of 2 special tools with the surfaces of 20 multiplied by 20mm T-shaped metals and respectively adhered to the centers of the side surface and the back surface of the test piece. After the glue is solidified, cutting off the decorative layer along the periphery of the T block, and cutting the decorative layer to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N) to the nearest 10N. Specimen surface bonding strength σ = Fmax A, to the nearest 0.01MPa, where A is the area of the specimen bonded to the chuck, and A =400mm 2 . The side surface bonding strength test result is as follows: 0.4MPa.
And (3) color difference test of the decorative film: performing black-white calibration on a color difference instrument, adopting a CIELAB value method, firstly testing the L, a and b values of the original decorative film, taking the values as standard samples, secondly testing the L ', a ' and b ' of the coated decorative film, and finally calculating delta E a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 14.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 16GU.
Comparative example 3
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Placing the special-shaped density board to be coated on a jig board, then coating adhesive polyurethane on the surface of the decorative film in a scraping way, wherein the thickness of the special-shaped density board is 100 micrometers, and heating the special-shaped density board at 80 ℃ for 10min, wherein the elongation of the decorative film is 100%; placing the glued decorative film on the surface of the special-shaped density board, and heating for 150s at 120 ℃;
(B) And pressurizing the upper box body to 150KPa, keeping for 100s, and simultaneously jacking the jig plate of the lower box body to complete the lamination of the special-shaped density plate.
The groove width of the surface of the special-shaped density board is 50mm, the depth of the groove is 15mm, the special-shaped density board is not completely coated by the decorative film, and the attaching effect is poor.
And (3) impact resistance test: the method comprises the following steps of (1) impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball which is 60mm away from the surface of the test piece, has the diameter of 42.8 +/-0.2 mm and the mass of 324 +/-5.0 g and is undamaged on the surface of the test piece, and recording whether cracks appear on the surface of the test piece. The surface of the decorative special-shaped density plate prepared by the comparative example is cracked.
Side surface gluing strength test method: and (3) polishing the surface of the test piece by using fine sand paper, uniformly coating the room temperature curing adhesive or the molten hot melt adhesive on the surface of 2 special metal tools with the surface of 20 multiplied by 20mmT, and respectively adhering the surfaces to the centers of the side surface and the back surface of the test piece. After the glue is solidified, cutting off the decorative layer along the periphery of the T block, and cutting the decorative layer to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing a test piece bonded with a special T-shaped metal tool on a universal mechanical testOn the machine, the test piece was broken in (60. + -.30) s from the start of the loading by uniformly loading in the direction perpendicular to the glued side, and the maximum load F was recorded max (N), to the nearest 10N. Specimen surface bonding strength σ = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.15MPa.
And (3) color difference test of the decorative film: performing black-white calibration on a color difference instrument, adopting a CIELAB value method, firstly testing the L, a and b values of the original decorative film, taking the values as standard samples, secondly testing the L ', a ' and b ' of the coated decorative film, and finally calculating delta E a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 13.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the gloss plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the gloss as G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the glossiness of the original membrane is represented, and the Delta G is 15GU.
Comparative example 4
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Placing the special-shaped density board to be coated on a jig board, then coating adhesive polyurethane on the surface of the decorative film in a scraping way, wherein the thickness of the decorative film is 100 mu m, and heating the decorative film at 80 ℃ for 10min, wherein the elongation of the decorative film is 100%; placing the heated decorative film on the surface of the special-shaped density board, and heating for 150s at 120 ℃;
(B) And pressurizing the upper box body to 150KPa, keeping for 100s, and simultaneously jacking the jig plate of the lower box body to complete the lamination of the special-shaped density plate.
The groove width of the surface of the special-shaped density board is 50mm, the depth of the groove is 15mm, the special-shaped density board is not completely coated by the decorative film, and the attaching effect is poor.
And (3) testing the impact resistance: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7 days; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball which is 60mm away from the surface of the test piece, has the diameter of 42.8 +/-0.2 mm and the mass of 324 +/-5.0 g and is undamaged on the surface of the test piece, and recording whether cracks appear on the surface of the test piece. The surface of the decorative shaped density plate prepared in this comparative example exhibited cracks.
Side surface gluing strength test method: the surface of a test piece is polished by fine sand paper, and a room temperature curing adhesive or a molten hot melt adhesive is uniformly coated on the surfaces of 2 special tools with the surfaces of 20 multiplied by 20mm T-shaped metals and respectively adhered to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N) to the nearest 10N. Specimen surface bonding strength σ = Fmax A, to the nearest 0.01MPa, where A is the area of the specimen bonded to the chuck, and A =400mm 2 . The side surface bonding strength test result is as follows: 0.25MPa.
And (3) color difference test of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b Thus characterizing the coatedThe difference in color between the decorative film and the original decorative film, delta E a,b Is 16.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 20GU.
Comparative example 5
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Brushing bottom coating agent polyamide on the side edge of the special-shaped density board to be subjected to plastic suction molding, wherein the thickness is 3 mu m;
(B) The method comprises the following steps Placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, then coating adhesive polyurethane on the surface of a decorative film in a blade mode, wherein the thickness of the adhesive polyurethane is 10 micrometers, and heating the adhesive polyurethane at 40 ℃ for 20min to obtain a coated decorative film, wherein the elongation of the decorative film is 50%; then pasting the glued decorative film at the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.05KPa, and then heating for 200s at 60 ℃;
(C) The method comprises the following steps The upper box body and the lower box body are kept at 0.05KPa for 300s, and simultaneously the jig plate of the lower box body is jacked up to complete the fitting of the special-shaped density plate.
The groove width of the surface of the special-shaped density board is 50mm, the depth of the groove is 10mm, the special-shaped density board is not completely coated by the decorative film, and the attaching effect is poor.
And (3) impact resistance test: impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, sticking the special-shaped density board coated with the decorative film on a particle board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, clamping the test piece and the particle board by using a test piece clamp, and if the thickness is more than 5mm, not supporting the particle board; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Clamping the decorative film surface of the test piece upwards in a frame type clamp and placing the test piece on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative special-shaped density plate prepared by the comparative example is cracked.
Side surface bonding strength test method: the surface of a test piece is polished by fine sand paper, and a room temperature curing adhesive or a molten hot melt adhesive is uniformly coated on the surfaces of 2 special tools with the surfaces of 20 multiplied by 20mm T-shaped metals and respectively adhered to the centers of the side surface and the back surface of the test piece. After the glue is solidified, cutting off the decorative layer along the periphery of the T block, and cutting the decorative layer to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N) to the nearest 10N. Specimen surface bonding strength σ = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.15MPa.
And (3) testing the color difference of the decorative film: performing black-white calibration on a color difference instrument, adopting a CIELAB value method, firstly testing the L, a and b values of the original decorative film, taking the values as standard samples, secondly testing the L ', a ' and b ' of the coated decorative film, and finally calculating delta E a,b The difference between the color of the coated decorative film and the color of the original decorative film is represented by delta E a,b Is 13.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 Second, test packThe glossiness of the decorative film after the coating forming is G 2 Finally, Δ G = G is calculated 2 -G 1 The difference of the glossiness of the coated membrane and the original membrane is represented by the difference, and the Delta G is 16GU.
Comparative example 6
A production process of a decorative special-shaped density board comprises the following steps:
(A) The method comprises the following steps Placing the special-shaped density board on a lower box body jig board, then coating adhesive polyurethane on the surface of the decorative film in a scraping mode, wherein the thickness of the adhesive polyurethane is 10 micrometers, and heating the adhesive polyurethane at 40 ℃ for 20min to obtain a coated decorative film, wherein the elongation of the decorative film is 50%; then pasting the glued decorative film at the middle position of the upper box body and the lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.05KPa, and then heating for 200s at 60 ℃;
(B) The method comprises the following steps And (3) keeping the lower box body at 0.05KPa, pressurizing the upper box body to 100KPa, keeping for 300s, and simultaneously jacking the jig plate of the lower box body to complete the attachment of the special-shaped density plate.
The groove width of the surface of the special-shaped density board is 50mm, the depth of the groove is 10mm, the special-shaped density board is not completely coated by the decorative film, and the attaching effect is poor.
And (3) testing the impact resistance: the method comprises the following steps of (1) impacting the surface of a test piece by using steel balls with specified mass to determine whether cracks appear on the surface of the test piece, wherein the specific test method comprises the following steps: (1) Firstly, the special-shaped density board coated with the decorative film is adhered to a shaving board by using an adhesive to prepare a test piece, if the thickness of the special-shaped density board is within the range of 2mm to 5mm, the test piece and the shaving board can be clamped by using a test piece clamp, and if the thickness is more than 5mm, the shaving board does not need to be supported; (2) Placing the test piece in an environment with the temperature of (23 +/-2) DEG C and the relative humidity of (50 +/-5)% for at least 7d; (3) Then clamping the decorative film surface of the test piece upwards in a frame type fixture and placing the fixture on a base of a falling ball impact tester; (4) Covering a piece of carbon paper on the surface of the test piece, enabling the carbon paper to be in close contact with the surface of the test piece, freely and vertically falling a polished steel ball with the diameter of (42.8 +/-0.2) mm and the mass of (324 +/-5.0) g and without damaging the surface on the surface of the test piece at a position 60mm away from the surface of the test piece, and recording whether cracks appear on the surface of the test piece or not. The surface of the decorative shaped density plate prepared in this comparative example exhibited cracks.
Strong side gluingThe degree test method comprises the following steps: the surface of a test piece is polished by fine sand paper, and a room temperature curing adhesive or a molten hot melt adhesive is uniformly coated on the surfaces of 2 special tools with the surfaces of 20 multiplied by 20mm T-shaped metals and respectively adhered to the centers of the side surface and the back surface of the test piece. After the glue is solidified, the decorative layer is cut off along the periphery of the T block, and the cutting is performed to the depth of the surface of the base material. If the thickness of the test piece is less than 8mm, bonding a square steel plate with the thickness of 10mm and the side length of 50mm on the back of the test piece by using a room temperature curing adhesive or hot melt adhesive to play a role in reinforcement; fixing the test piece bonded with the T-shaped metal special tool on a universal mechanical testing machine, uniformly loading in the direction vertical to the gluing side surface, destroying the test piece within (60 +/-30) s from the loading, and recording the maximum load F max (N) to the nearest 10N. Specimen surface bonding strength σ = Fmax A, accurate to 0.01MPa, where a is the area of the specimen bonded to the chuck, a =400mm 2 . The side surface bonding strength test result is as follows: 0.25MPa.
And (3) testing the color difference of the decorative film: the color difference instrument is used for black-white calibration, a CIELAB value method is adopted, the values of L, a and b of the original decorative film are firstly tested, the values are used as standard samples, then the values of L ', a ' and b ' of the decorative film after coating forming are tested, and finally delta E is calculated a,b The difference in color between the coated decorative film and the original decorative film, Δ E, is characterized in this way a,b Is 13.
And (3) testing the glossiness: a polished black glass was used as a reference plate, and a gloss value of 1.567 in refractive index at a wavelength of 587.6nm was defined as 100. Preheating and zeroing according to the use requirements of the instrument, adjusting the glossiness plate, testing the original decorative film under the geometric condition of 60 degrees, and recording the glossiness G 1 And secondly, the gloss of the over-molded decorative film was measured to be G 2 Finally, Δ G = G is calculated 2 -G 1 The glossiness difference between the coated membrane and the original membrane is represented by the difference, and the Delta G is 15GU.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A production process of a decorative special-shaped density board is characterized by comprising the following steps: the production process comprises the following steps:
(A) The method comprises the following steps Rolling and brushing a primer on the side edge of the special-shaped density board to be subjected to plastic sucking molding, wherein the thickness of the primer is 3-10 mu m;
(B) The method comprises the following steps Placing the special-shaped density board subjected to rolling brush treatment on a lower box body jig board, coating an adhesive on the surface of a decorative film in a scraping way, heating at 40-75 ℃ for 3-20 min, then pasting the decorative film coated with the adhesive on the middle position of an upper box body and a lower box body, closing the upper box body and the lower box body, vacuumizing until the vacuum degree reaches 0.1-0.2 KPa, heating by adopting infrared rays with the wavelength of 2-4 mu m, and heating at 80-120 ℃ for 50-100 s;
(C) Keeping the pressure in the lower box body at 0.1 KPa-0.2 KPa, pressurizing the upper box body to 120 KPa-180 KPa, simultaneously jacking the jig plate of the lower box body, then relieving the pressure in the upper box body at the rate of 1.2 KPa/s-6 KPa/s until the pressure in the upper box body is 101KPa, and pressurizing the lower box body to 101KPa at the rate of 4 KPa/s-6 KPa/s to complete the bonding of the decorative film on the special-shaped density plate.
2. The process for producing a decorative profiled density sheet as claimed in claim 1, wherein in step (B), the adhesive has a thickness of 10 to 200 μm.
3. The process for producing a decorative profiled density sheet as claimed in claim 1, wherein in step (B), the adhesive is selected from one or more of polyurethane, acrylic, silicone.
4. The production process of the decorative profiled density sheet as claimed in claim 1, wherein the elongation of the decorative film is 50-300%.
5. The production process of the decorative special-shaped density board according to claim 1, wherein in the step (B), the adhesive is coated on the surface of the decorative film by blade coating and heated at 50-60 ℃ for 5-10 min.
6. The process for producing a decorative profiled density sheet as claimed in claim 1, wherein in step (a), the primer is selected from one or more of polyamide, polyurethane and epoxy resin.
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JPH04288214A (en) * 1991-01-19 1992-10-13 Dainippon Printing Co Ltd Method and apparatus for vacuum laminate molding
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CN105015130A (en) * 2015-08-04 2015-11-04 四川杰邦科技有限公司 Positive/negative pressure vacuum film covering machine
CN110791174A (en) * 2019-11-12 2020-02-14 成都硅宝科技股份有限公司 Polyurethane primer and preparation method thereof
CN112094617A (en) * 2020-11-19 2020-12-18 佛山市南海区瑞森新型材料研究所 Polyurethane adhesive, composite material prepared from polyurethane adhesive and application of composite material

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04288214A (en) * 1991-01-19 1992-10-13 Dainippon Printing Co Ltd Method and apparatus for vacuum laminate molding
JP2002067137A (en) * 2000-09-04 2002-03-05 Fuse Shinku Kk Vacuum forming apparatus
CN1333114A (en) * 2001-08-28 2002-01-30 陆建明 Paint duplication device and method for wood
CN1422742A (en) * 2001-12-07 2003-06-11 罗永开 Method for laying film on workpiece
JP2014040817A (en) * 2012-08-23 2014-03-06 Mazda Motor Corp Heat insulation structure of engine combustion chamber component, and method for manufacturing the same
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