CN113844190B - Production process of matt pearlescent powder-added mobile phone backboard - Google Patents
Production process of matt pearlescent powder-added mobile phone backboard Download PDFInfo
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- CN113844190B CN113844190B CN202111138139.9A CN202111138139A CN113844190B CN 113844190 B CN113844190 B CN 113844190B CN 202111138139 A CN202111138139 A CN 202111138139A CN 113844190 B CN113844190 B CN 113844190B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000007639 printing Methods 0.000 claims abstract description 31
- 238000007650 screen-printing Methods 0.000 claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 25
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- 238000012546 transfer Methods 0.000 claims abstract description 10
- 201000009310 astigmatism Diseases 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 89
- 239000011347 resin Substances 0.000 claims description 24
- 229920005989 resin Polymers 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 16
- 239000002966 varnish Substances 0.000 claims description 15
- 239000000047 product Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 239000004814 polyurethane Substances 0.000 claims description 12
- 229920002635 polyurethane Polymers 0.000 claims description 12
- 238000010023 transfer printing Methods 0.000 claims description 11
- 239000004925 Acrylic resin Substances 0.000 claims description 9
- 229920000178 Acrylic resin Polymers 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
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- 238000004049 embossing Methods 0.000 claims description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
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- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 3
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 238000009713 electroplating Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- -1 ethoxy, methoxy Chemical group 0.000 claims description 3
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 3
- 229920001249 ethyl cellulose Polymers 0.000 claims description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
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- 238000002156 mixing Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
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- 238000002360 preparation method Methods 0.000 claims description 3
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- 239000000080 wetting agent Substances 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/14—Multicolour printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/24—Inking and printing with a printer's forme combined with embossing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/06—Veined printings; Fluorescent printings; Stereoscopic images; Imitated patterns, e.g. tissues, textiles
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
Abstract
The invention discloses a production process of a matte pearl powder-added mobile phone backboard, which comprises the following steps: (1) processing a composite substrate; (2) silk screen printing of the logo layer; (3) printing the transfer pattern layer; (4) printing the electroplated layer; (5) printing the cover bottom layer; (6) printing the astigmatism enhancement layer; (7) processing the rubbing texture layer; (8) processing the transparent hardening layer; (9) high-pressure molding processing; and (10) cutting and forming the mobile phone backboard. The invention realizes the gradual three-dimensional display effect of gradual change of the pattern colors from dark to high, combines the rubbing texture layer to show rich gradual change color textures, improves the texture display effect and improves the ornamental value; by arranging the light scattering molecular layer and the light scattering structure for forming the double light scattering structure, the reflected light of the color pattern reflects the color light of different angles, and the distortion problem is avoided, so that the color and texture effects are enriched.
Description
Technical Field
The invention relates to the technical field of mobile phone backboard production, in particular to a production process of a matte pearl powder added mobile phone backboard.
Background
With the development of technology, mobile terminals such as mobile phones and tablet computers have higher and higher utilization rates in various aspects of work, study, daily communication and the like. The mobile phone is a 3C product which is used by people at present, and occupies a mainstream position in the market.
As a product with higher frequency of use, the mobile phone has higher and higher requirements for mobile phone products by users. Users pay more attention to the appearance of mobile phone products besides having higher requirements on the hardware of the mobile phone products. The appearance of the mobile phone product can bring direct visual experience to the user, and the quality evaluation of the product by the user is determined to a great extent. The surface quality of the shell of the mobile phone product directly determines the appearance quality of the product. The existing mobile phone backboard has the advantages that the patterns are mostly plane patterns, the color is single, the three-dimensional layering is poor, the attractiveness is poor, the existing mobile phone backboard is characterized in that the light rays after being subjected to color pattern treatment are reflected out through the reflecting layer, the angle of the reflecting layer is mostly fixed, the coverage rate of the reflected light rays is low, and the light rays are weakened after being subjected to multilayer reflection and pass through the color pattern layer, so that the textures and logo patterns of the texture layer cannot be clearly displayed, and the color effect of the color layer is obviously reduced under the light ray reflection; in order to increase differentiation and further improve the appearance quality of the product and meet the higher and higher aesthetic requirements of users, the invention provides a production process of a matte pearlescent powder added mobile phone backboard.
Disclosure of Invention
The invention provides a production process of a matte pearl powder-added mobile phone backboard, which aims at the defects of the prior art.
The technical scheme adopted by the invention for achieving the purpose is as follows:
a production process of a matte pearl powder-added mobile phone backboard comprises the following steps:
(1) Processing a composite substrate: cutting the transparent PMMA plate into a composite substrate with a specified size through cutting equipment, processing a step bulge structure on the upper surface of the composite substrate through CNC equipment, and processing a light scattering structure on the lower surface of the composite substrate;
(2) Silk screen processing of silk screen logo layer: printing a transparent linking adhesive layer on the lower surface of the composite substrate, and printing logo pattern ink and a transparent area on the transparent linking adhesive layer to form a silk-screen logo layer;
(3) Printing and processing of the transfer printing pattern layer: coating transfer printing ink below the silk screen logo layer to form a transfer printing pattern layer with transfer printing patterns;
(4) Printing and processing of electroplated layers: printing electroplating ink with metallic luster under the transfer pattern layer to form an electroplated layer;
(5) Printing and processing a cover bottom layer: printing a cover base ink having a plurality of light bead particles under the electroplated layer to form a cover base layer having a pearlescent appearance;
(6) Printing and processing of the astigmatism enhancement layer: printing fluid resin provided with a plurality of light scattering molecules on the upper surface of the composite substrate to form a light scattering reinforcing layer;
(7) Processing a rubbing texture layer: rubbing ink is smeared on the astigmatism enhancement layer to form a rubbing texture layer;
(8) Processing the transparent hardening layer: coating transparent hardening resin on the rubbing texture layer to form a transparent hardening layer;
(9) High-pressure forming processing: performing high-pressure molding on the treated composite substrate to obtain a mobile phone backboard semi-finished product;
(10) Cutting and forming a mobile phone backboard: and cutting, polishing and forming the mobile phone backboard semi-finished product through CNC equipment to form a mobile phone backboard product.
The surface of the transparent hardening layer is provided with a matte area and a transparent area II, and the matte area is provided with embossed concave-convex patterns; the transparent hardening layer is prepared from the following substances in parts by weight: 35-50 parts of polyurethane acrylic prepolymer, 1-10 parts of grafted modified acrylic monomer, 0.5-7 parts of photoinitiator and 0.05-2 parts of flatting agent; 30-60 parts of solvent.
Further improved, the step (8) further comprises the following steps:
(8.1) embossing the embossed pattern by an embossing device after the transparent hardening resin is smeared;
(8.2) simultaneously carrying out irradiation curing by an ultraviolet lamp, wherein the ultraviolet illuminance of the ultraviolet curing is 300-500 mj/cm 2 ；
And (8.3) resetting the imprinting equipment after the ultraviolet curing is finished, and finishing the manufacture of the transparent hardening layer.
The polyurethane acrylic prepolymer is aliphatic polyurethane acrylic resin with more than 3 functionalities or aromatic polyurethane acrylic resin with more than 3 functionalities;
the acrylic monomer modified by grafting is acrylic monomer modified by ethoxy, methoxy or hexyl inner group and has more than 3 functionalities.
The leveling agent is an organic siloxane or organosilicon modified acrylic leveling agent; the solvent is one or a combination of butanone, ethanol, isopropanol, toluene, xylene, methyl isobutyl ketone and ethylcellulose.
The step bulge structure of the step (1) comprises a central bulge, a first bulge, a second bulge and a third bulge from top to bottom in sequence, the step bulge is completed by milling through CNC equipment in sequence, the central bulge, the first bulge, the second bulge and the third bulge are cylindrical bulges, the diameter of the central bulge is smaller than that of the first bulge, the diameter of the first bulge is smaller than that of the second bulge, the diameter of the second bulge is smaller than that of the third bulge, the astigmatism structure is formed by a plurality of hemispherical bulges, and equal intervals are arranged between the hemispherical bulges and the hemispherical bulges.
Further improved, the step (2) comprises the following steps:
preparing logo pattern ink, performing screen printing on the prepared logo pattern ink under the composite substrate by a screen printing technology, wherein a screen printing plate is arranged in the screen printing technology, the screen printing plate is provided with a logo pattern area and a transparent area I, the logo pattern ink is arranged in the logo pattern area, the transparent area I is provided with transparent positioning ink, and then performing a curing process to form a screen printing logo layer;
the screen mesh number printed in the screen printing technology is 250-400 meshes, the scraping hardness is 70-90A, the curing temperature is 60-80 ℃, and the curing time is 20-60 minutes.
Further improved is the preparation method of the fluid resin in the step (6): mixing and stirring the resin binder and the diluent uniformly, adding the light scattering powder and the dispersing agent, stirring until the mixture is uniform, adding the defoaming agent and the wetting agent, and stirring until the mixture is uniform to obtain fluid resin containing a plurality of light scattering molecules; the resin binder is one or more of polyamide resin, epoxy resin and acrylic resin.
The transfer printing pattern layer is provided with a central transparent area III, a first pattern area, a second pattern area and a third pattern area, the central transparent area III is provided with high transparent ink, the first pattern area, the second pattern area and the third pattern area are sequentially provided with gradient color pattern ink, and the gradient color pattern ink comprises the following raw materials in parts by weight: 8-10 parts of resin, 1-2 parts of modified luminescent material, 0.1-5 parts of multifunctional auxiliary agent and 0.5-1 part of varnish, wherein the darkness of varnish in a first pattern area is shallower than that of varnish in a second pattern area, and the darkness of varnish in the second pattern area is shallower than that of varnish in a third pattern area.
Further improving, wherein the thickness of the electroplated layer is 40-450nm, the electroplated layer is printed by screen printing technology, the number of screen printing plates printed in the screen printing technology is 300-400 meshes, the hardness of scraping glue is 70-90A, and the thickness of scraping glue is 600-1000mj/cm 2 And (5) irradiating the mixture for 30 to 90 seconds by an ultraviolet lamp to cure the mixture.
The invention has the beneficial effects that: according to the invention, the central lug, the first lug, the second lug and the third lug are arranged to enable logo patterns and texture patterns to have three-dimensional layering, so that the three-dimensional effect of the texture patterns is improved, and the ornamental value is improved; the light scattering molecular layer and the light scattering structure are arranged to form a double light scattering structure, so that reflected light rays of the color patterns reflect color light rays of different angles, distortion problems are avoided, the effects of rich colors and texture are achieved, improvement of the visual effect of the appearance of the back plate of the photo-dumb pearlescent powder-added mobile phone is facilitated, the original light rays penetrate into the lower part of the composite substrate from intervals, the reflected color light rays are scattered again to obtain the color light rays of different angles through the hemispherical convex blocks, the reflection angle range of the color light rays is improved, the good ornamental effect of the color light rays is greatly improved, the reflection color range is more colorful, and the attractive appearance is greatly improved; the first pattern area, the second pattern area and the third pattern area are used for realizing the gradual change effect that the color from outside to the center gradually changes from dark to high, and the rubbing texture layer is combined to show rich gradual change color textures and gradual change texture effects, so that the texture display effect is greatly improved; the underlid layer of underlid ink is used to provide a display effect of spot color by providing a plurality of bead particles, thereby providing a combination of appearance effects of starry sky gradation.
The invention will be further described with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic diagram of a process flow module for producing a flat and pearlescent powder added mobile phone back plate according to the embodiment;
fig. 2 is a schematic diagram of the structure of a handset back panel with matt and pearlescent powder according to the embodiment;
fig. 3 is a schematic cross-sectional view of the back plate of the matte pearlescent powder-added mobile phone in this embodiment.
Detailed Description
The following description is of the preferred embodiments of the invention, and is not intended to limit the scope of the invention.
Referring to fig. 1 to 3, an embodiment of the present invention relates to a process for producing a handset back plate with matt and pearly-lustre powder, which includes the following steps:
(1) Processing of the composite substrate 1: cutting a transparent PMMA plate into a composite substrate 1 with a specified size through cutting equipment, processing a step bulge structure 10 on the upper surface of the composite substrate 1 through CNC equipment, and processing a light scattering structure 11 on the lower surface of the composite substrate 1;
(2) Silk screen processing of the silk screen logo layer 2: printing a transparent linking adhesive layer on the lower surface of the composite substrate 1, printing logo pattern ink 20 and a transparent area 21 on the transparent linking adhesive layer to form a silk-screen logo layer 2, wherein the pattern ink 20 is arranged on the central position of the transparent area 21;
(3) Printing processing of the transfer pattern layer 3: coating transfer ink below the silk-screen logo layer 2 to form a transfer pattern layer 3 with a transfer pattern 30;
(4) Printing processing of the plating layer 4: printing electroplating ink with metallic luster under the transfer pattern layer to form an electroplated layer 4;
(5) Printing of the cover substrate 5: printing a cover base ink having a plurality of light bead particles 50 under the plating layer 4 to form a cover base layer 5 having a pearlescent appearance;
(6) Printing process of the astigmatism enhancement layer 6: printing fluid resin provided with a plurality of light scattering molecules 60 on the upper surface of the composite substrate to form a light scattering reinforcing layer 6;
(7) Processing a rubbing texture layer 7: applying rubbing ink on the astigmatism enhancement layer 6 to form a rubbing texture layer 7, wherein the rubbing texture layer 7 is used for providing a gradual change texture pattern appearance in combination with the transfer pattern layer 3;
(8) Processing of the transparent hardened layer 8: coating transparent hardening resin on the rubbing texture layer 7 to form a transparent hardening layer 8;
(9) High-pressure forming processing: performing high-pressure molding on the treated composite substrate 1 to obtain a mobile phone backboard semi-finished product;
(10) Cutting and forming of the mobile phone backboard 9: and cutting, polishing and forming the mobile phone backboard semi-finished product through CNC equipment to form a mobile phone backboard 9 product.
The surface of the transparent hardening layer 8 is provided with a smooth area 80 and a transparent area II 81, the smooth area 80 is provided with an embossed concave-convex pattern 800, the smooth area 80 is used for providing a pattern smooth and matte pattern, and the transparent area II 81 is used for displaying a logo pattern and a transfer pattern layer 3, so that the appearance effect of combining the smooth effect and the highlight effect is realized; the transparent hardening layer 8 is made of the following materials in parts by weight: 35-50 parts of polyurethane acrylic prepolymer, 1-10 parts of grafted modified acrylic monomer, 0.5-7 parts of photoinitiator and 0.05-2 parts of flatting agent; 30-60 parts of solvent.
The step (8) further comprises the steps of:
(8.1) embossing the embossed pattern by an embossing device after the transparent hardening resin is smeared;
(8.2) simultaneously carrying out irradiation curing by an ultraviolet lamp, wherein the ultraviolet illuminance of the ultraviolet curing is 300-500 mj/cm 2 ；
And (8.3) resetting the imprinting equipment after the ultraviolet curing is finished, and finishing the manufacture of the transparent hardening layer.
The polyurethane acrylic prepolymer is aliphatic polyurethane acrylic resin with more than 3 functionalities or aromatic polyurethane acrylic resin with more than 3 functionalities;
the acrylic monomer modified by grafting is acrylic monomer modified by ethoxy, methoxy or hexyl inner group and has more than 3 functionalities.
The leveling agent is an organic siloxane or organic silicon modified acrylic leveling agent; the solvent is one or a combination of butanone, ethanol, isopropanol, toluene, xylene, methyl isobutyl ketone and ethylcellulose.
Step protruding structure 10 of step (1) is by last down including central lug 100, first lug 101, second lug 102 and third lug 103 in proper order, step protruding structure 10 is through CNC equipment up milling in proper order and is accomplished, central lug 100, first lug 101, second lug 102 and third lug 103 are cylindrical lug, the diameter of central lug 100 is less than first lug 101, the diameter of first lug 101 is less than second lug 102, the diameter of second lug 102 is less than third lug 103, astigmatic structure 11 comprises a plurality of hemispheroidal protrusion, be equipped with equidistant between hemispheroidal protrusion and the hemispheroidal protrusion, the interval is used for the passing of former light, astigmatic structure 11 is used for making the divergent effect of reflection colour light to improve the reflection scope of reflection colour light, improve the various effect.
The step (2) comprises the following steps:
preparing logo pattern ink, performing screen printing on the prepared logo pattern ink under the composite substrate 1 through a screen printing technology, wherein a screen printing plate is arranged in the screen printing technology, a logo pattern area and a transparent area I are arranged on the screen printing plate, the logo pattern ink 20 is arranged in the logo pattern area, transparent positioning ink is arranged on the transparent area I, and then a curing process is performed to form a screen printing logo layer 2;
the screen mesh number printed in the screen printing technology is 250-400 meshes, the scraping hardness is 70-90A, the curing temperature is 60-80 ℃, and the curing time is 20-60 minutes.
The preparation method of the fluid resin in the step (6) comprises the following steps: mixing and stirring the resin binder and the diluent uniformly, adding the light scattering powder and the dispersing agent, stirring until the mixture is uniform, adding the defoamer and the wetting agent, and stirring until the mixture is uniform to obtain fluid resin containing a plurality of light scattering molecules 60; the resin binder is one or more of polyamide resin, epoxy resin and acrylic resin.
The transfer printing pattern layer 3 is provided with a central transparent area III 30, a first pattern area 31, a second pattern area 32 and a third pattern area 33, the central transparent area III 30 is provided with high transparent ink, the first pattern area 31, the second pattern area 32 and the third pattern area 33 are sequentially provided with gradient color pattern ink, and the gradient color pattern ink comprises the following raw materials in parts by weight: 8-10 parts of resin, 1-2 parts of modified luminescent material, 0.1-5 parts of multifunctional auxiliary agent and 0.5-1 part of varnish, wherein the darkness of varnish in a first pattern area is shallower than that of varnish in a second pattern area, the darkness of varnish in the second pattern area is shallower than that of varnish in a third pattern area, the third central transparent area 30 is correspondingly arranged below the central convex block 100, the first pattern area 31 is arranged below the first convex block 101, the second pattern area 32 is arranged below the second convex block 102, and the third pattern area 33 is arranged below the third convex block 103.
The thickness of the electroplated layer 4 is 40-450nm, the electroplated layer 4 is printed by a screen printing technology, the number of screen printing plates printed by the screen printing technology is 300-400 meshes, the scraping hardness is 70-90A, and the scraping hardness is 600-1000mj/cm 2 And (5) irradiating the mixture for 30 to 90 seconds by an ultraviolet lamp to cure the mixture.
According to the invention, the central lug, the first lug, the second lug and the third lug are arranged to enable logo patterns and texture patterns to have three-dimensional layering, so that the three-dimensional effect of the texture patterns is improved, and the ornamental value is improved; the light scattering molecular layer and the light scattering structure are arranged to form a double light scattering structure, so that reflected light rays of the color patterns reflect color light rays of different angles, distortion problems are avoided, the effects of rich colors and texture are achieved, improvement of the visual effect of the appearance of the back plate of the photo-dumb pearlescent powder-added mobile phone is facilitated, the original light rays penetrate into the lower part of the composite substrate from intervals, the reflected color light rays are scattered again to obtain the color light rays of different angles through the hemispherical convex blocks, the reflection angle range of the color light rays is improved, the good ornamental effect of the color light rays is greatly improved, the reflection color range is more colorful, and the attractive appearance is greatly improved; the first pattern area, the second pattern area and the third pattern area are used for realizing the gradual change effect that the color from outside to the center gradually changes from dark to high, and the rubbing texture layer is combined to show rich gradual change color textures and gradual change texture effects, so that the texture display effect is greatly improved; the underlid layer of underlid ink is used to provide a display effect of spot color by providing a plurality of bead particles, thereby providing a combination of appearance effects of starry sky gradation.
The invention is not limited to the above embodiments, and other processes for producing the back plate of the mobile phone with the matte pearl powder obtained by adopting the same or similar structure, device, process or method as the above embodiments of the invention are all within the protection scope of the invention.
Claims (9)
1. A production process of a matte pearl powder-added mobile phone backboard is characterized by comprising the following steps of: which comprises the following steps:
(1) Processing a composite substrate: cutting the transparent PMMA plate into a composite substrate with a specified size through cutting equipment, processing a step bulge structure on the upper surface of the composite substrate through CNC equipment, and processing a light scattering structure on the lower surface of the composite substrate;
the step bulge structure in the step (1) sequentially comprises a central bulge, a first bulge, a second bulge and a third bulge from top to bottom, the step bulge is sequentially milled upwards through CNC equipment, the central bulge, the first bulge, the second bulge and the third bulge are cylindrical bulges, the diameter of the central bulge is smaller than that of the first bulge, the diameter of the first bulge is smaller than that of the second bulge, the diameter of the second bulge is smaller than that of the third bulge, the light scattering structure is formed by a plurality of hemispherical bulges, and equal intervals are arranged between the hemispherical bulges and the hemispherical bulges;
(2) Silk screen processing of silk screen logo layer: printing a transparent linking adhesive layer on the lower surface of the composite substrate, and printing logo pattern ink and a transparent area on the transparent linking adhesive layer to form a silk-screen logo layer;
(3) Printing and processing of the transfer printing pattern layer: coating transfer printing ink below the silk screen logo layer to form a transfer printing pattern layer with transfer printing patterns;
(4) Printing and processing of electroplated layers: printing electroplating ink with metallic luster under the transfer pattern layer to form an electroplated layer;
(5) Printing and processing a cover bottom layer: printing a cover base ink having a plurality of light bead particles under the electroplated layer to form a cover base layer having a pearlescent appearance;
(6) Printing and processing of the astigmatism enhancement layer: printing fluid resin provided with a plurality of light scattering molecules on the upper surface of the composite substrate to form a light scattering reinforcing layer;
(7) Processing a rubbing texture layer: rubbing ink is smeared on the astigmatism enhancement layer to form a rubbing texture layer;
(8) Processing the transparent hardening layer: coating transparent hardening resin on the rubbing texture layer to form a transparent hardening layer, wherein a smooth area and a transparent area II are arranged on the surface of the transparent hardening layer, and embossing concave-convex patterns are arranged on the smooth area;
(9) High-pressure forming processing: performing high-pressure molding on the treated composite substrate to obtain a mobile phone backboard semi-finished product;
(10) Cutting and forming a mobile phone backboard: and cutting, polishing and forming the mobile phone backboard semi-finished product through CNC equipment to form a mobile phone backboard product.
2. The production process of the matt pearlescent powder added mobile phone backboard according to claim 1, which is characterized in that: the transparent hardening layer is prepared from the following substances in parts by weight: 35-50 parts of polyurethane acrylic prepolymer, 1-10 parts of grafted modified acrylic monomer, 0.5-7 parts of photoinitiator and 0.05-2 parts of flatting agent; 30-60 parts of solvent.
3. The production process of the matt pearlescent powder added mobile phone backboard according to claim 1, which is characterized in that: the step (8) further comprises the steps of:
(8.1) embossing the embossed pattern by an embossing device after the transparent hardening resin is smeared;
(8.2) Simultaneous ultraviolet light Lamp irradiation curing, ultraviolet curingThe ultraviolet illuminance is 300-500 mj/cm 2 ；
And (8.3) resetting the imprinting equipment after the ultraviolet curing is finished, and finishing the manufacture of the transparent hardening layer.
4. The production process of the matt pearlescent powder added mobile phone backboard according to claim 2, which is characterized in that: the polyurethane acrylic prepolymer is aliphatic polyurethane acrylic resin with more than 3 functionalities or aromatic polyurethane acrylic resin with more than 3 functionalities;
the acrylic monomer modified by grafting is acrylic monomer modified by ethoxy, methoxy or hexyl inner group and has more than 3 functionalities.
5. The production process of the matt pearlescent powder added mobile phone backboard according to claim 4, which is characterized in that: the leveling agent is an organic siloxane or organic silicon modified acrylic leveling agent; the solvent is one or a combination of butanone, ethanol, isopropanol, toluene, xylene, methyl isobutyl ketone and ethylcellulose.
6. The production process of the matt pearlescent powder added mobile phone backboard according to claim 1, which is characterized in that: the step (2) comprises the following steps:
preparing logo pattern ink, performing screen printing on the prepared logo pattern ink under the composite substrate by a screen printing technology, wherein a screen printing plate is arranged in the screen printing technology, the screen printing plate is provided with a logo pattern area and a transparent area I, the logo pattern ink is arranged in the logo pattern area, the transparent area I is provided with transparent positioning ink, and then performing a curing process to form a screen printing logo layer;
the screen mesh number printed in the screen printing technology is 250-400 meshes, the scraping hardness is 70-90A, the curing temperature is 60-80 ℃, and the curing time is 20-60 minutes.
7. The production process of the matt pearlescent powder added mobile phone backboard according to claim 1, which is characterized in that: the preparation method of the fluid resin in the step (6) comprises the following steps: mixing and stirring the resin binder and the diluent uniformly, adding the light scattering powder and the dispersing agent, stirring until the mixture is uniform, adding the defoaming agent and the wetting agent, and stirring until the mixture is uniform to obtain fluid resin containing a plurality of light scattering molecules; the resin binder is one or more of polyamide resin, epoxy resin and acrylic resin.
8. The production process of the matt pearlescent powder added mobile phone backboard according to claim 7, which is characterized in that: the transfer printing pattern layer is provided with a central transparent region III, a first pattern region, a second pattern region and a third pattern region, the central transparent region III is provided with high transparent ink, the first pattern region, the second pattern region and the third pattern region are sequentially provided with gradient color pattern ink, and the gradient color pattern ink comprises the following raw materials in parts by weight: 8-10 parts of resin, 1-2 parts of modified luminescent material, 0.1-5 parts of multifunctional auxiliary agent and 0.5-1 part of varnish, wherein the darkness of varnish in a first pattern area is shallower than that of varnish in a second pattern area, and the darkness of varnish in the second pattern area is shallower than that of varnish in a third pattern area.
9. The production process of the matt pearlescent powder added mobile phone backboard according to claim 8, which is characterized in that: the thickness of the electroplated layer is 40-450nm, the electroplated layer is printed by screen printing technology, the number of screen printing plates printed by the screen printing technology is 300-400 meshes, the scraping hardness is 70-90A, and the scraping hardness is 600-1000mj/cm 2 And (5) irradiating the mixture for 30 to 90 seconds by an ultraviolet lamp to cure the mixture.
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