Veneer with melamine decorative paper veneer and preparation method

Abstract

According to the veneer with the melamine decorative paper veneering and the preparation method, the veneer comprises a middle base material layer, high-density boards arranged on the upper face and the lower face of the middle base material layer and melamine softening paper arranged on the high-density boards in a hot-pressing mode, and the middle base material layer is a shaving board. A traditional three-layer composite technology is changed into a five-layer composite technology, the high-density board and the softened triamine paper are reserved after grooving, the brittleness and toughness of the materials are solved, the product bending yield is increased, and the problems of adhesive tape separation and color difference caused by uneven spraying of a softening agent and interference of the spraying amount can be solved by adopting the melamine softened paper.

Description

Technical Field

[0001] The invention belongs to the technical field of decorative panels, and in particular relates to a decorative panel with a melamine decorative paper veneer and a preparation method thereof. Background Art

[0002] The existing decorative panels with melamine decorative paper veneer are composed of decorative paper, substrate and decorative paper. Before bending, a softener must be used to pre-treat the formed panels to reduce their brittleness and improve their bending performance, or 3MM high-density boards are used to stick melamine-impregnated adhesive paper alone, and then bent using a high-frequency hot bending machine on a fixed mold. The above-mentioned products usually have the following defects: First, although the use of softeners can reduce the brittleness of melamine-impregnated paper, it is easy to cause problems such as adhesive paper separation and color difference, affecting the quality and aesthetics of the product; second, the commonly used substrate particleboard has low density, large bonding pores between particles, poor flexibility of the board, and is easy to break when bent, resulting in creases on the paper surface; third, the hot bending mold is expensive, the mold opening cycle is long, and the arc size cannot be adjusted immediately according to the design, affecting the delivery of customized products. Summary of the invention

[0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide a decorative panel with melamine decorative paper veneer and a preparation method, which is specifically achieved through the following technical solutions:

[0004] The veneer panel with melamine decorative paper veneer comprises an intermediate substrate layer, high-density boards arranged on the upper and lower surfaces of the intermediate substrate layer, and melamine softened paper hot-pressed on the high-density boards, wherein the intermediate substrate layer is a particle board.

[0005] A method for preparing a veneer panel with a melamine decorative paper veneer comprises the following steps:

[0006] 1) Put the high-density board into the sanding machine for sanding, and adjust the sanding machine according to the thickness of the high-density board;

[0007] 2) pasting the melamine softened paper on the high-density board, and then putting it into a hot press for hot pressing, and after the hot pressing is completed, the pressure is maintained to obtain the pasted softened paper;

[0008] 3) After the melamine softened paper veneer process is completed, the particleboard blank is placed in a gluing machine for gluing using soybean vegetable glue. After the gluing is completed, the re-veneered softened paper is pasted on the front and back surfaces of the blank after gluing;

[0009] 4) After gluing, place the particle board for 30-60 seconds, and then put it into a cold press;

[0010] 5) After the cold pressing is completed, put it into the hot pressing machine for hot pressing. The hot pressing pressure of the hot pressing machine is 5-6 Map, the hot pressing temperature is 95℃-100℃, and the hot pressing time is 480-660 seconds. After the hot pressing is completed, the pressure can be maintained.

[0011] Furthermore, in step 1), the sanding belt used for sanding is 180 mesh or 240 mesh, the sanding speed is 75-100 m / min, and the thickness is set to 1.5 mm.

[0012] Furthermore, in step 2), the hot pressing pressure of the hot pressing machine is 5-6 Map, the hot pressing temperature is 95° C.-100° C., and the hot pressing time is 25-35 seconds.

[0013] Furthermore, the holding pressure in step 2) is specifically as follows: adjusting the holding pressure value of the hot press to 0-2 Map, the holding pressure temperature to 95° C.-100° C., and the holding pressure time to 60-120 seconds.

[0014] Furthermore, in step 3), the amount of adhesive is controlled at 300-420 g / m2, and the thickness of the softened paper is not less than 1.5 mm.

[0015] Furthermore, in step 4), the cold pressing pressure is 4-6 kg / cm2, and the cold pressing time is 25-35 minutes.

[0016] Furthermore, the holding pressure in step 5) is specifically as follows: the holding pressure value of the hot press is adjusted to 0-2 Map, the holding pressure temperature is 95° C.-100° C., and the holding pressure time is 60-120 seconds.

[0017] The present invention changes the traditional three-layer composite process into a five-layer composite process, and the reserved materials after slotting are high-density board and softened melamine paper, which solves the brittleness and toughness of the material and improves the bending yield of the product. By adopting melamine softened paper, the problems of adhesive tape separation and color difference caused by uneven softener spraying and excessive spraying can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a layered structure diagram of the present invention;

[0019] In the figure, 1-middle base material layer, 2-high density board, 3-melamine softened paper. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings in order to better understand the technical solution.

[0021] The veneer panel with melamine decorative paper veneer comprises an intermediate substrate layer, high-density boards arranged on the upper and lower surfaces of the intermediate substrate layer, and melamine softened paper hot-pressed on the high-density boards. The intermediate substrate layer is a particle board.

[0022] The melamine softened paper veneer pressing method comprises the following steps:

[0023] Step 1: Sanding of high-density board: Put 2mm thick high-density board into the sanding machine for sanding. Adjust the sanding machine according to the thickness of the high-density board. The sanding belt used for sanding is 180 mesh or 240 mesh. The sanding speed is 75-100m / min. The thickness is sanded to 1.5mm.

[0024] Step 2: Hot pressing and laminating: paste the softened melamine paper on the high-density board, and then put it into the hot press for hot pressing. The hot pressing pressure of the hot press is 5-6 Map, the hot pressing temperature is 95℃~100℃, and the hot pressing time is 25-35 seconds. After the hot pressing is completed, the holding pressure is carried out, and the holding pressure value of the hot press is adjusted to 0-2 Map, the holding temperature is 95℃~100℃, and the holding time is 60-120 seconds.

[0025] The process of fabric glued particleboard includes the following steps:

[0026] Step 1: After the melamine softened paper veneer process is completed, the board blank is placed in the glue spreading machine with soybean vegetable glue for gluing. The glue amount is controlled at 300-420g / m 2 , paste the softened paper after pasting on the front and back surfaces of the board blank after the glue is finished; the thickness of the pasted softened paper should be no less than 1.5mm;

[0027] Step 2: Cold pressing: place the glued particle board for 30-60 seconds, then put it into the cold press machine for cold pressing. The cold pressing pressure is 4-6 kg / cm 2 , the cold pressing time is about 30 minutes;

[0028] Step 3: Hot pressing: After the cold pressing is completed, put it into the hot pressing machine for hot pressing. The hot pressing pressure of the hot pressing machine is 5-6 Map, the hot pressing temperature is 95℃-100℃, and the hot pressing time is 480-660 seconds. After the hot pressing is completed, the holding pressure is carried out, and the holding pressure value of the hot pressing machine is adjusted to 0-2 Map, the holding temperature is 95℃-100℃, and the holding time is 60-120 seconds.

[0029] Step 4: Finished product quality inspection: The thickness of the 18mm plate is controlled at 17.8~18mm, and the appearance quality and physical and mechanical properties of the plate are inspected.

[0030] The melamine softened paper is prepared by the existing preparation process, specifically:

[0031] Dipping treatment: The base paper is completely immersed in the urea-formaldehyde resin impregnation liquid, taken out, and dried to obtain the dipped base paper;

[0032] Coating treatment: coating the melamine compound on both sides of the impregnated base paper, drying it, and obtaining melamine softened paper.

[0033] In the dipping process, the drying temperature is 110-130°C and the time is 20-30s. In the coating process, the drying temperature is 80-100°C and the time is 30-40s.

[0034] The melamine compound comprises modified melamine glue and a softener, wherein the weight ratio of the modified melamine glue to the softener is 10:0.1-0.3. The softener is a fatty acid ester softener and / or a polyethylene softener. The modified melamine glue is made of the following raw materials in weight: 100 parts of a formaldehyde solution with a mass fraction of 38-40%, 97-100 parts of melamine, 30-40 parts of diethylene glycol, 5-10 parts of a modifier, and 30-40 parts of water.

[0035] Example 1

[0036] The melamine softened paper veneer pressing method comprises the following steps:

[0037] Step 1: Sanding of high-density board: Put 2mm thick high-density board into the sanding machine for sanding. Adjust the sanding machine according to the thickness of the high-density board. The sanding belt used for sanding is 180 mesh or 240 mesh. The sanding speed is 75m / min. The thickness is sanded to 1.5mm.

[0038] Step 2: Hot pressing and laminating: Paste the softened melamine paper on the high-density board, and then put it into the hot press for hot pressing. The hot pressing pressure of the hot press is 6Map, the hot pressing temperature is 95℃, and the hot pressing time is 35 seconds. After the hot pressing is completed, the holding pressure is carried out, and the holding pressure value of the hot press is adjusted to 2Map, the holding temperature is 95℃, and the holding time is 60 seconds.

[0039] The process of fabric glued particleboard includes the following steps:

[0040] Step 1: After the melamine softened paper veneer process is completed, the board blank is placed in the glue spreading machine with soybean vegetable glue for gluing. The glue spreading amount is controlled at 300 / m 2 , paste the softened paper after pasting on the front and back surfaces of the board blank after the glue is finished; the thickness of the pasted softened paper should be no less than 1.5mm;

[0041] Step 2: Cold pressing: place the glued particle board for 30 seconds, then put it into the cold press machine for cold pressing at a pressure of 4kg / cm 2 , the cold pressing time is about 30 minutes;

[0042] Step 3: hot pressing: after the cold pressing is completed, put it into the hot press machine for hot pressing, the hot pressing pressure of the hot press machine is 5Map, the hot pressing temperature of the hot press machine is 95℃, and the hot pressing time of the hot press machine is 480 seconds; after the hot pressing is completed, the holding pressure is carried out, the holding pressure value of the hot press machine is adjusted to 1Map, the holding temperature is 100℃, and the holding time is 120 seconds; and sample 1 is obtained.

[0043] Example 2

[0044] The melamine softened paper veneer pressing method comprises the following steps:

[0045] Step 1: Sanding of high-density board: Put 2mm thick high-density board into the sanding machine for sanding. Adjust the sanding machine according to the thickness of the high-density board. The sanding belt used for sanding is 180 mesh or 240 mesh. The sanding speed is 85m / min. The thickness is set to 1.5mm.

[0046] Step 2: Hot pressing and laminating: Paste the melamine softened paper on the high-density board, and then put it into the hot press for hot pressing. The hot pressing pressure of the hot press is 5.5Map, the hot pressing temperature is 98℃, and the hot pressing time is 30 seconds. After the hot pressing is completed, the holding pressure is carried out, and the holding pressure value of the hot press is adjusted to 1Map, the holding temperature is 100℃, and the holding time is 100 seconds.

[0047] The process of fabric glued particleboard includes the following steps:

[0048] Step 1: After the melamine softened paper laminating process is completed, the board blank is put into the glue spreading machine with soybean vegetable glue for gluing. The glue amount is controlled at 400g / m 2 , paste the softened paper after pasting on the front and back surfaces of the board blank after the glue is finished; the thickness of the pasted softened paper should be no less than 1.5mm;

[0049] Step 2: Cold pressing: place the glued particle board for 50 seconds, then put it into the cold press machine for cold pressing at a pressure of 5kg / cm 2 , cold pressing time is 35 minutes;

[0050] Step 3: hot pressing: after the cold pressing is completed, put it into the hot press machine for hot pressing, the hot pressing pressure of the hot press machine is 6Map, the hot pressing temperature is 95℃, and the hot pressing time is 550 seconds; after the hot pressing is completed, the holding pressure is carried out, the holding pressure value of the hot press machine is adjusted to 2Map, the holding temperature is 100℃, and the holding time is 120 seconds; and sample 2 is obtained.

[0051] Example 3

[0052] The melamine softened paper veneer pressing method comprises the following steps:

[0053] Step 1: Sanding of high-density board: Put 2mm thick high-density board into the sanding machine for sanding. Adjust the sanding machine according to the thickness of the high-density board. The sanding belt used for sanding is 180 mesh or 240 mesh. The sanding speed is 100m / min. The thickness is set to 1.5mm.

[0054] Step 2: Hot pressing and laminating: Paste the melamine softened paper on the high-density board, and then put it into the hot press for hot pressing. The hot pressing pressure of the hot press is 6Map, the hot pressing temperature is 95℃, and the hot pressing time is 35 seconds. After the hot pressing is completed, the holding pressure is carried out, and the holding pressure value of the hot press is adjusted to 1.5Map, the holding temperature is 100℃, and the holding time is 90 seconds.

[0055] The process of fabric glued particleboard includes the following steps:

[0056] Step 1: After the melamine softened paper veneer process is completed, the board blank is put into the glue spreading machine with soybean vegetable glue for gluing. The glue amount is controlled at 420g / m 2 , paste the softened paper after pasting on the front and back surfaces of the board blank after the glue is finished; the thickness of the pasted softened paper should be no less than 1.5mm;

[0057] Step 2: Cold pressing: place the glued particle board for 45 seconds, then put it into the cold press machine for cold pressing at a pressure of 4kg / cm 2 , cold pressing time is 25 minutes;

[0058] Step 3: hot pressing: after the cold pressing is completed, put it into the hot press machine for hot pressing, the hot pressing pressure of the hot press machine is 5Map, the hot pressing temperature of the hot press machine is 99℃, and the hot pressing time of the hot press machine is 660 seconds; after the hot pressing is completed, the holding pressure is carried out, the holding pressure value of the hot press machine is adjusted to 1Map, the holding temperature is 100℃, and the holding time is 100 seconds; obtain sample 3.

[0059] Example 4

[0060] The melamine softened paper veneer pressing method comprises the following steps:

[0061] Step 1: Sanding of high-density board: Put 2mm thick high-density board into the sanding machine for sanding. Adjust the sanding machine according to the thickness of the high-density board. The sanding belt used for sanding is 180 mesh or 240 mesh. The sanding speed is 80m / min. The thickness is set to 1.5mm.

[0062] Step 2: Hot pressing and laminating: Paste the melamine softened paper on the high-density board, and then put it into the hot press for hot pressing. The hot pressing pressure of the hot press is 5.7Map, the hot pressing temperature is 96℃, and the hot pressing time is 33 seconds. After the hot pressing is completed, the holding pressure is adjusted to 1.5Map, the holding temperature is 97℃, and the holding time is 95 seconds.

[0063] The process of fabric glued particleboard includes the following steps:

[0064] Step 1: After the melamine softened paper veneer process is completed, the board blank is placed in the glue spreading machine with soybean vegetable glue for gluing. The glue amount is controlled at 350g / m 2 , paste the softened paper after pasting on the front and back surfaces of the board blank after the glue is finished; the thickness of the pasted softened paper should be no less than 1.5mm;

[0065] Step 2: Cold pressing: place the glued particle board for 40 seconds, then put it into the cold press machine for cold pressing at a pressure of 5kg / cm 2 , cold pressing time is 30 minutes;

[0066] Step 3: hot pressing: after the cold pressing is completed, put it into the hot press machine for hot pressing, the hot pressing pressure of the hot press machine is 5Map, the hot pressing temperature of the hot press machine is 98℃, and the hot pressing time of the hot press machine is 600 seconds; after the hot pressing is completed, the holding pressure is carried out, the holding pressure value of the hot press machine is adjusted to 1Map, the holding temperature is 100℃, and the holding time is 90 seconds; and sample 4 is obtained.

[0067] The sample decorative panels prepared by the above preparation method were tested according to GB / T17657-2013 test method for physical and chemical properties of wood-based panels and veneer wood-based panels. The test results are shown in Table 1.

[0068] Table 1

[0069]

Claims

1. A veneer with melamine decorative paper veneer, characterized in that The decorative panel comprises an intermediate substrate layer (1), a high-density board (2) arranged on the upper and lower surfaces of the intermediate substrate layer (1), and melamine softened paper (3) hot-pressed and arranged on the high-density board (2), wherein the intermediate substrate layer (1) is a particle board.

2. The method for preparing the veneer with melamine decorative paper veneer according to claim 1, characterized in that The following steps are involved: 1) Put the high-density board into the sanding machine for sanding, and adjust the sanding machine according to the thickness of the high-density board; 2) pasting the melamine softened paper on the high-density board, and then putting it into a hot press for hot pressing, and after the hot pressing is completed, the pressure is maintained to obtain the pasted softened paper; 3) After the melamine softened paper veneer process is completed, the particleboard blank is placed in a gluing machine for gluing using soybean vegetable glue. After the gluing is completed, the re-veneered softened paper is pasted on the front and back surfaces of the blank after gluing; 4) After gluing, place the particle board for 30-60 seconds, and then put it into a cold press; 5) After the cold pressing is completed, put it into the hot pressing machine for hot pressing. The hot pressing pressure of the hot pressing machine is 5-6 Map, the hot pressing temperature is 95℃-100℃, and the hot pressing time is 480-660 seconds. After the hot pressing is completed, the pressure can be maintained.

3. The method for preparing a veneer panel with melamine decorative paper veneer according to claim 2, characterized in that: In step 1), the sanding belt used for sanding is 180 mesh or 240 mesh, the sanding speed is 75-100 m / min, and the thickness of the sand is set to 1.5 mm.

4. The method for preparing a veneer panel with melamine decorative paper veneer according to claim 2, characterized in that: In step 2), the hot pressing pressure of the hot pressing machine is 5-6 Map, the hot pressing temperature is 95° C.-100° C., and the hot pressing time is 25-35 seconds.

5. The method for preparing a veneer panel with melamine decorative paper veneer according to claim 2, characterized in that: The holding pressure in step 2) is specifically as follows: the holding pressure value of the hot press is adjusted to 0-2 Map, the holding pressure temperature is 95° C.-100° C., and the holding pressure time is 60-120 seconds.

6. The method for preparing a veneer panel with melamine decorative paper veneer according to claim 2, characterized in that: In step 3), the amount of glue is controlled at 300-420 g / m 2 The thickness of the softened paper should be no less than 1.5mm.

7. The method for preparing a veneer panel with melamine decorative paper veneer according to claim 2, characterized in that: Step 4) The cold pressing pressure is 4-6 kg / cm 2 , the cold pressing time is 25-35 minutes.

8. The method for preparing a veneer panel with melamine decorative paper veneer according to claim 2, characterized in that: The specific steps of step 5) are as follows: the holding pressure value of the hot press is adjusted to 0-2 Map, the holding temperature is 95° C.-100° C., and the holding time is 60-120 seconds.

Images