CN117799017A - Surface damage-resistant special-shaped line pressing and pasting technology - Google Patents
Surface damage-resistant special-shaped line pressing and pasting technology Download PDFInfo
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- CN117799017A CN117799017A CN202311416520.6A CN202311416520A CN117799017A CN 117799017 A CN117799017 A CN 117799017A CN 202311416520 A CN202311416520 A CN 202311416520A CN 117799017 A CN117799017 A CN 117799017A
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- 238000000034 method Methods 0.000 claims abstract description 55
- 230000008569 process Effects 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 50
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- 238000005452 bending Methods 0.000 claims abstract description 9
- 238000007731 hot pressing Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 238000010894 electron beam technology Methods 0.000 claims description 32
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- 238000010030 laminating Methods 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 12
- 238000004049 embossing Methods 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
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- 239000003292 glue Substances 0.000 claims description 7
- -1 acrylic ester Chemical class 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 4
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
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- 239000011094 fiberboard Substances 0.000 claims description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 2
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims description 2
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- 239000004814 polyurethane Substances 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 239000011090 solid board Substances 0.000 claims 1
- 239000003973 paint Substances 0.000 abstract description 10
- 238000012546 transfer Methods 0.000 abstract description 8
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- 229910000831 Steel Inorganic materials 0.000 description 5
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- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Laminated Bodies (AREA)
Abstract
The invention discloses a surface damage-resistant special-shaped line pressing and pasting process, which comprises the following steps of: placing a base material on a sleeve mold attached with a coating film and impregnated printing paper, and bending the sleeve mold to form a laminated coating structure with the base material by the sleeve mold, the coating film and the impregnated printing paper; and placing the sleeve die coated with the base material in a die, and carrying out pressurizing, heating and hot pressing to paste to obtain the pressed base material. The invention provides a special-shaped pressing and pasting process with an anti-damage surface. The process adopts the cured EB coating transfer film and combines special-shaped molding equipment to transfer the EB coating to the surface of a product through a pressing and pasting process, thereby solving the limit of using special EB equipment. The process can lead the paint film hardness of the paint film formed by compounding the EB coating on the pressing base material and the triamine paper to be far higher than that of the paint film prepared by the conventional EB flat roller coating process, has the anti-damage performance, and has no color difference problem when being matched with flat products.
Description
Technical Field
The invention belongs to the technical field of plate processing, and particularly relates to a surface damage-resistant special-shaped line pressing and pasting technology.
Background
Most furniture products use triamine flat plates as materials. The triamine flat plate is made by pressing and pasting triamine paper on a flat plate base material, and is commonly used for manufacturing door panels, cabinet bodies, wall boards and the like. But a small part of furniture products such as laminate, roman pole, top and bottom line, door pocket line and the like are special-shaped products, and when the special-shaped products are matched with a triamine flat plate for use, color difference can occur due to different materials. The current special-shaped products are generally coated by soft materials such as paint paper and film materials, which also lead to lower surface hardness and damage resistance of the special-shaped products.
In addition, there are several surface treatments on the market at present, such as thermal curing, UV curing, EB (electron beam) curing, etc. Among them, EB cured surface treatment provides the best damage resistance, but EB surface treatment on the market at present is a special equipment, usually by coating or roll-coating transparent EB paint on a triamine plate, and then by electron beam curing. The method is only suitable for flat products, and cannot be used for manufacturing special-shaped lines.
Disclosure of Invention
In order to overcome the problems in the prior art, one of the purposes of the invention is to provide a surface damage-resistant special-shaped line pressing and pasting process. The second objective of the present invention is to provide a pressed substrate manufactured by the above process. The invention provides a surface damage-resistant special-shaped pressing and pasting process aiming at two problems in the prior art. The process adopts the cured EB coating transfer film and combines special-shaped molding equipment to transfer the EB coating to the surface of a product through a pressing and pasting process, thereby solving the limit of using special EB equipment. The product produced by the method has anti-damage performance and has no color difference problem when matched with a flat product.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the first aspect of the invention provides a surface damage-resistant special-shaped line pressing and pasting process, which comprises the following steps:
s1, placing a base material on a cover die attached with a coating film and impregnated printing paper, and bending the cover die to enable the cover die, the coating film, the impregnated printing paper and the base material to form a laminated coating structure;
s2, placing the sleeve die coated with the base material in a die, and carrying out pressurizing, heating and hot pressing to obtain a pressed base material;
the base material is a special-shaped line material;
the special-shaped profile of the sleeve mold and the special-shaped profile of the base material are consistent; the inner side contour of the die is matched with the contour of the sleeve die to form mutual interpolation.
Preferably, the sleeve mold is an ultrathin special-shaped stainless steel mold.
Preferably, the sleeve die is provided with one or more bending points.
Preferably, the preparation steps of the sleeve mold with the coating film and the impregnated printing paper are as follows: paving a coating film on the cover die, wherein the coating surface of the coating film is far away from the cover die; and paving the impregnated printing paper on the coating film.
Preferably, the embossing effect of the sleeve mold is selected from pitted surface, cloth grain, wood grain, stone grain, etc.
Preferably, the specific steps of bending are as follows: and bending the ultrathin steel mold according to the appearance of the pressing line of the base material, so that the texture surface of the ultrathin steel mold is completely consistent with the abnormal contour of the base material.
Preferably, in step S2, the pretreatment process of the sleeve mold includes decal etching, shot blasting, and electroplating.
More preferably, the decal etching process is as follows: etching with acid liquid to obtain surface embossing.
The process has the advantage that the thicker the embossing is, the better the reduction degree of the surface effect of the finished product is.
More preferably, the shot blasting process is to polish the surface of the mold with a shot & sand blaster.
The process has the advantages that the surface texture of the sleeve mold is finer and smoother, the coating is not damaged during pressing,
more preferably, the electroplating is chrome plating on the surface of the mold.
Preferably, the coating film is an electron beam cured acrylate coating film; more preferably, the acrylate is one or more of epoxy acrylate, urethane acrylate, 1, 6-hexanediol diacrylate.
More preferably, the components of the coating further comprise a cross-linking agent, a coupling agent, a leveling agent, a dispersing agent, a light stabilizer, an ultraviolet absorber.
More preferably, the film material of the coating film is a transparent PET film.
Preferably, the impregnated printing paper is a printing paper impregnated with melamine glue and/or urea-formaldehyde glue.
Preferably, the impregnated printing paper has a gum dipping amount of 130-190%, a volatile content of 5-9% and a pre-curing degree of 30-70%, and preferably, the substrate is made of medium-density fiberboard or solid wood board.
Preferably, the base material is an L-shaped door pocket line, a square column body of the cabinet body, a special-shaped edge plate and the like.
Preferably, the mold is made of stainless steel. More preferably, the stainless steel material is 410# or 633#.
More preferably, the pretreatment process of the die is as follows: milling the inner side outline size of the die by a milling machine, and fully interpolating and attaching the die to the sleeve die.
Preferably, in the step S3, the pressing time is 20-70S;
preferably, in the step S3, the pressing temperature is 175-205 ℃;
preferably, in the step S3, the pressing pressure is 5-20MPa.
In a second aspect, the invention provides a pressure-sensitive adhesive substrate produced by the process of the first aspect.
The beneficial effects of the invention are as follows:
the invention provides a special-shaped pressing and pasting technology for surface damage resistance, which adopts a technology that a cured EB coating transfer film and triamine paper are laid on a sleeve die in advance, so that the subsequent EB coating transfer film and triamine paper can completely cover a base material, and the EB coating is transferred to the surface of a product through a pressing and pasting technology by combining special-shaped mould pressing equipment, thereby solving the limitation of using special EB equipment and improving the pasting strength. The process can be used for facing various special-shaped surfaces, adopts the die pressing equipment combining a special-shaped die and a special-shaped sleeve die to prepare the EB coating and the triamine paper laminated coating material, can realize the lamination facing of the special-shaped plates which cannot be directly faced by the triamine paper and the EB coating, and is suitable for processing by the existing equipment. The process can lead the paint film hardness of the paint film formed by compounding the EB coating on the pressing base material and the triamine paper to be far higher than that of the paint film prepared by the conventional EB flat roller coating process, has the anti-damage performance, and has no color difference problem when being matched with flat products.
Drawings
FIG. 1 is a schematic view of a sleeve mold in an open state;
FIG. 2 is a schematic diagram of a closed state structure of a sleeve mold;
FIG. 3 is a schematic view of a material film;
FIG. 4 is a schematic diagram of the structure before the lamination process;
FIG. 5 is a partial schematic view of the structure prior to the lamination process;
FIG. 6 is a schematic diagram of a press-bonding process;
FIG. 7 is a schematic view of a structure of a pressing substrate;
reference numerals: 1. an upper die; 2. a lower die; 3. sleeving a die; 4. a transparent PET material; 5. an EB coating; 6. triamine paper; 7. a substrate; wherein the transparent PET material and the acrylic coating form an EB coating film.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The starting materials used in the examples below, unless otherwise specified, were all available from conventional commercial sources or were isolated by simple synthetic preparation; the processes used, unless otherwise specified, are all conventional in the art.
Example 1
1. Pretreatment process for each component
(1) And (3) a mold: namely, a special-shaped hot-pressing die is arranged on a press, temperature and pressure are given during pressing, coating and triamine paper are promoted to be solidified on special-shaped lines, the die is divided into an upper die 1 and a lower die 2, and the preparation method of the special-shaped pressing die is as follows:
a. and (3) design: designing the inner side profile dimension parameters of the upper die 1 and the lower die 2 according to the sleeve die pressing line pasting modeling;
b. milling: preparing a metal square body (the material is mainly stainless steel material: 410# or 633 #) with the same-pressure press lamination area, milling the inner side contour of the die by a milling machine according to a design procedure, and polishing the die smoothly, so that the die can be completely attached to the interpolation sleeve die 3;
c. fixing: the upper and lower molds are fixed to the press and need to be precisely aligned.
(2) And (5) sleeve mold: the cover die 3 is an ultrathin special-shaped stainless steel die, is an ultrathin die with the texture extruded on the surface and curing triamine glue, and is prepared by the following steps:
a. and (3) design: designing an embossing effect of a die according to the appearance effect of the product;
b. cutting and polishing: preparing a steel plate blank (the material is mainly stainless steel material: 410# or 633 #), cutting into 2850 x 1220mm, and polishing the surface smooth (the thickness is 0.6 mm)
c. And (3) embossing and etching: etching by combining a film screen-airing process with acidic liquid (the more abundant the embossing layers are, the more times are needed in the process), and manufacturing surface embossing, wherein the thicker the coating is, the better the reduction degree of the surface effect of the finished product is;
d. shot blasting and sand blasting: polishing the surface of the die by using a shot blasting machine and a sand blasting machine to ensure that the surface texture is finer and smoother, and the coating is not damaged during pressing and pasting;
e. electroplating: plating chromium on the surface of the die, increasing the surface hardness, and reducing the damage of the die during pressing;
f. bending: the ultrathin steel template is bent according to the appearance of the pressing line of the base material 7, so that the texture surface of the ultrathin steel template is completely consistent with the abnormal outline of the base material. The bending point is arranged in the middle of the sleeve die plate in the embodiment, so that the sleeve die can be opened and closed, the opening state is shown in fig. 1, and the closing state is shown in fig. 2.
(3) EB coating film: the transparent PET material and the acrylic ester coating form an EB coating film, and the specific structure is that the surface of the transparent PET material 4 is coated with a composite material of an acrylic ester coating (EB coating) 5 cured by electron beams.
The coating film is coiled material, the total width is 1265mm, and the effective width is 1240mm; total thickness 0.17mm (wherein PET film 0.12mm, coating 0.05 mm);
the main components of the coating comprise 30% of epoxy acrylate, 35% of polyurethane acrylate, 20% of 1, 6-hexanediol diacrylate, 10% of cross-linking agent, 1% of coupling agent, 0.5% of leveling agent, 1% of dispersing agent, 1% of light stabilizer and 1% of ultraviolet absorber;
the coating film was cut to 2820 x 1265mm ready.
(4) Triamine paper: the triamine paper 6 is printing paper (triamine paper for short) impregnated with melamine glue and urea glue, the size is 2820 x 1250mm, the gram weight of the printing paper is 95g, the gum dipping amount is 130%, the volatile content is 6%, the pre-curing degree is 35%, and the surface is printed with pure color or texture color.
(5) A base material: the pressing base material 7 is a special-shaped line material, the size is 2800-550-25 mm (one side is rounded with R12.5 mm), the middle density fiber board base material of 2800-1220-25 mm is cut, and then an arc edge is milled by CNC;
2. pressing and pasting technology
S1, sticking a strip: opening the cover die 3, and paving a coating film on the cover die 3, wherein the transparent PET material 4 is attached to the cover die 3, and the EB coating 5 faces upwards; paving the triamine paper 6 on the coating film, wherein the printing layer is downwards compounded with the acrylic ester coating layer 5;
s2, film coating: placing a substrate 7 on the triamine paper 6 as shown in fig. 3; closing the cover die 3 to form a laminated coating structure with the cover die, the coating film, the impregnated printing paper and the base material;
s3, pressing and pasting: the upper and lower molds are closed by the hot pressing equipment, the structure before closing is shown in fig. 4 and 5, and the combined sleeve mold is pressed and stuck (the whole structure is shown in fig. 6). The parameters are adjusted as follows: pressing and pasting time is 30s, pressing and pasting temperature is 195 ℃ and pressing and pasting pressure is 12MPa;
s4, after the pressing and pasting time is over, the lower die descends, and the pressing and pasting product is taken out; after the lamination, the surface quality is checked, and the transparent PET film 4 on the surface is torn off, and at this time, the EB coating 5 and the triamine paper 6 are already attached to the surface of the profiled lamination substrate 7 (the final structure diagram is shown in FIG. 7).
Example 2
The pretreatment process and the lamination process of each part are the same as those of the embodiment 1, except that the parameters of S3 in the lamination process of the embodiment 2 are adjusted as follows: the pressing time is 20s, the pressing temperature is 200 ℃, and the pressing pressure is 14MPa.
Example 3
The pretreatment process and the lamination process of each part are the same as those of the embodiment 1, except that the parameters of S3 in the lamination process of the embodiment 2 are adjusted as follows: the pressing time is 20s, the pressing temperature is 180 ℃, and the pressing pressure is 10MPa.
Example 4
The pretreatment process and the lamination process of each part are the same as those of the embodiment 1, except that the parameters of S3 in the lamination process of the embodiment 2 are adjusted as follows: the pressing time is 20s, the pressing temperature is 180 ℃, and the pressing pressure is 12MPa.
Characterization of the test
Performance tests were performed on the pressed substrates of examples 1-4 and the substrates prepared by the conventional EB plate roll coating process, with standard references GBT17657-2022, GBT 4893-2013, GBT 9286-2021, GBT 6739-2006, and the physicochemical properties are shown in table 1:
TABLE 1
As can be seen from Table 1, the laminating pressure of the laminating process should not be lower than 12MPa, and in addition, the hardness of the paint film formed by compounding the EB coating and the triamine paper on the laminating substrate prepared in examples 1 and 2 is far higher than that of the paint film prepared by the conventional EB flat roller coating process. The invention adopts the cured EB coating transfer film and combines special-shaped mould pressing equipment to transfer the EB coating to the surface of the product through the press-pasting technology, thereby not only solving the limit of using special EB equipment, but also improving the damage resistance of the press-pasting base material, and having no color difference problem when being matched with the flat product.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The surface damage-resistant special-shaped line pressing and pasting process is characterized by comprising the following steps of:
s1, paving a coating film on a cover die, wherein the coating surface of the coating film is far away from the cover die; paving impregnated printing paper on the coating film;
s2, placing a base material on a cover die attached with a coating film and impregnated printing paper, and bending the cover die to enable the cover die, the coating film, the impregnated printing paper and the base material to form a laminated coating structure;
s3, placing the sleeve die coated with the base material in a die, and carrying out pressurizing, heating and hot pressing to obtain a pressed base material;
the base material is a special-shaped line material;
the special-shaped profile of the sleeve mold and the special-shaped profile of the base material are consistent; the inner side contour of the die is matched with the contour of the sleeve die.
2. The surface damage-resistant special-shaped line laminating process according to claim 1, wherein the sleeve die is an ultrathin special-shaped stainless steel die.
3. The surface damage-resistant profiled bar laminating process of claim 1, wherein the sleeve die is provided with one or more bending points.
4. The surface damage-resistant special-shaped line laminating process according to claim 1, wherein in the step S2, the pretreatment process of the sleeve mold comprises embossing etching, shot blasting and electroplating.
5. The surface damage-resistant profiled bar laminating process of claim 1, wherein the coating film is an electron beam cured acrylate coating film;
and/or the acrylic ester is one or more of epoxy acrylic ester, polyurethane acrylic ester and 1, 6-hexanediol diacrylate.
6. The surface damage-resistant profiled bar laminating process of claim 1, wherein the impregnated printing paper is a printing paper impregnated with melamine glue and/or urea-formaldehyde glue;
and/or the impregnated printing paper has a gum dipping amount of 130-190%, a volatile content of 5-9% and a pre-curing degree of 30-70%.
7. The surface damage-resistant profiled bar laminating process of claim 1, wherein the substrate is a medium density fiberboard or a solid board.
8. The surface damage-resistant special-shaped line pressing and pasting process of claim 1, wherein the die is made of stainless steel;
and/or the die is completely attached to the sleeve die.
9. The surface damage-resistant profiled bar laminating process according to claim 1, wherein the laminating process conditions are one or more of the following:
a) The pressing time is 20-70s;
b) The pressing temperature is 175-205 ℃;
c) The pressing pressure is 5-20MPa.
10. The laminated substrate produced by the surface damage-resistant profile strip laminating process of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311416520.6A CN117799017A (en) | 2023-10-27 | 2023-10-27 | Surface damage-resistant special-shaped line pressing and pasting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311416520.6A CN117799017A (en) | 2023-10-27 | 2023-10-27 | Surface damage-resistant special-shaped line pressing and pasting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117799017A true CN117799017A (en) | 2024-04-02 |
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ID=90420748
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311416520.6A Pending CN117799017A (en) | 2023-10-27 | 2023-10-27 | Surface damage-resistant special-shaped line pressing and pasting technology |
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| Country | Link |
|---|---|
| CN (1) | CN117799017A (en) |
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2023
- 2023-10-27 CN CN202311416520.6A patent/CN117799017A/en active Pending
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