CN210724879U

CN210724879U - 3D mobile phone rear shell decoration film capable of being formed and then hardened by UV

Info

Publication number: CN210724879U
Application number: CN201921356752.6U
Authority: CN
Inventors: 席忠飞; 王华生; 郭仕巧
Original assignee: Huizhou Moma Dingli Technology Co Ltd
Current assignee: Huizhou Moma Dingli Technology Co Ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-06-09
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a 3D cell-phone backshell decorating film of UV sclerosis after shaping earlier, including a carrier membrane be provided with UV sclerosis layer in the one side of carrier membrane, the another side on UV sclerosis layer is provided with the UV barrier layer, the another side of UV barrier layer has set gradually and can have printed coating, printing layer and plating layer. The utility model discloses a but 3D cell-phone backshell decorating film of shaping back UV sclerosis earlier, its UV sclerosis layer is in the state of solidifying in advance, has good thermoplasticity in 3D cell-phone shell course of working, and the elongation can reach 300%, can do the curved shaping of big camber heat, has certain intensity and heat resistance simultaneously, can be at cross cutting, preforming, keeps the outward appearance stability in the course of working such as moulding plastics. After injection molding process accomplished, through the UV passageway, UV sclerosis layer can the secondary cure sclerosis, stereotypes, and at this moment, the carrier membrane can easily be peeled off, obtains the 3D cell-phone backshell of hardness more than 6H.

Description

3D mobile phone rear shell decoration film capable of being formed and then hardened by UV

Technical Field

The utility model relates to a mobile phone decoration membrane technical field especially relates to a 3D cell-phone backshell decorating film of UV sclerosis after can shaping earlier.

Background

Curved surface cell-phone is constantly rising, and 3D cell-phone shell all has further the flying over in outward appearance and quality. For the plane cell-phone shell that the market was sold, 3D cell-phone shell has brand-new 3D's image quality impression, and more individual design pursue a science and technology and fashion's perfect convergence. The crystal shell is fragile and hard, and is easy to collapse, so that the crystal shell is likely to be frequently replaced, the processing technology of the glass rear shell is complex, the yield is low, and the cost is high. The metal rear shell which is easy to process and has good appearance texture is eliminated with the coming of the 5G era. The plastic mobile phone shell with metal and glass textures manufactured by the mode of in-mold injection molding of the decorative film is gradually a good choice, and in order to enable the mobile phone shell to have better surface hardness, the HC coating is generally selected to be made, for example, the HC coating is coated on the surface of the PC/PMMA co-extruded film, and the rear shell similar to glass can be made. However, since the HC coating is too hard and brittle to make a large curved rear shell, the HC coating cracks during the preforming process, thereby affecting the aesthetic appearance. The common printing film can be sprayed with a hardened coating after injection molding, but the processing efficiency is low, the cost is high, orange peel lines are easy to generate in appearance, especially the environmental pollution is serious, and the process is increasingly not preferable along with the enhancement of the pursuit of environmental friendliness of people.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can be earlier the 3D cell-phone backshell decorating film of shaping back UV sclerosis.

For solving the above technical problem, the utility model discloses a technical scheme is: the utility model provides a 3D cell-phone backshell decorating film that can form earlier back UV sclerosis, includes a carrier membrane be provided with UV sclerosis layer in the one side of carrier membrane, the another side on UV sclerosis layer is provided with the UV barrier layer, the another side of UV barrier layer has set gradually and can have printed coating, printing layer and plating layer.

Preferably, the carrier film takes a PET, PP, PMMA plastic film as a base material, and a release film layer is coated on one surface of the carrier film which is in contact with the UV hardening layer.

Preferably, the UV hardening layer is an acrylic resin coating layer, and the thickness of the UV hardening layer is 20-40 μm.

Preferably, the UV blocking layer is polymethyl methacrylate, and a coating formed by adding 0.2% -2% of an ultraviolet absorber is formed.

Preferably, the printable coating is a coating formed by polymethyl methacrylate, and the thickness of the printable coating is 1-3 mu m.

Preferably, the plating layer is a thin film of an Si alloy series or an In alloy series formed on the printing layer by magnetron sputtering.

Preferably, the PET, PP and PMMA substrate has a thickness of 50-100 μm, a light transmittance of more than 91% and a glossiness of more than 150%.

To sum up, the application the technical scheme of the utility model, following beneficial effect has: the utility model discloses a but 3D cell-phone backshell decorating film of shaping back UV sclerosis earlier, its UV sclerosis layer is in the state of solidifying in advance, has good thermoplasticity in 3D cell-phone shell course of working, and the elongation can reach 300%, can do the curved shaping of big camber heat, has certain intensity and heat resistance simultaneously, can be at cross cutting, preforming, keeps the outward appearance stability in the course of working such as moulding plastics. After injection molding process accomplished, through the UV passageway, UV sclerosis layer can the secondary cure sclerosis, stereotypes, and at this moment, the carrier membrane can easily be peeled off, obtains the 3D cell-phone backshell of hardness more than 6H.

Drawings

Fig. 1 is a schematic structural view of the decoration film of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, but does not constitute a limitation to the scope of the present invention.

As shown in fig. 1, the utility model discloses a can be earlier 3D cell-phone backshell decorating film of shaping back UV sclerosis, including a carrier membrane 1 be provided with UV sclerosis layer 2 in the one side of carrier membrane 1, the another side of UV sclerosis layer 2 is provided with UV barrier layer 3, and UV barrier layer 3's another side has set gradually printable coating 4, printing layer 5 and plating layer 6. In particular, the method comprises the following steps of,

the carrier film 1 uses PET, PP, PMMA plastic film as the base material, and a release film layer is coated on the surface of the carrier film contacting with the UV hardening layer.

The UV hardening layer 2 is an acrylic resin coating layer with a thickness of 20-40 μm;

the UV blocking layer 3 is a coating formed by adding 0.2 to 2 percent of ultraviolet absorbent into polymethyl methacrylate;

the printable coating 4 is a coating formed by polymethyl methacrylate, and the thickness of the printable coating is 1-3 mu m;

the electroplated layer 6 is a Si alloy series or In alloy series film formed on the printing layer by magnetron sputtering;

the thickness of the PET, PP and PMMA substrate is 50-100 mu m, the light transmittance is more than 91%, and the glossiness is more than 150%.

The utility model discloses a decorative film preparation method as follows:

the method comprises the following steps of firstly, manufacturing a carrier film, selecting high-transparency PET, PP and PMMA substrates according to different curved surface requirements, wherein the thickness of the high-transparency PET, PP and PMMA substrates is 50-100 micrometers, the light transmittance is greater than 91%, the glossiness is greater than 150%, and the high-transparency PET, PP and PMMA substrates have good thermal extensibility. Coating a layer of organic silicon release agent on the surface, coating by a micro-gravure roll, wherein the coating weight is 0.02-0.06 g/square meter, and the release force is controlled to be 350-1000 g/inch;

secondly, coating a UV hardening layer on the parting surface of the carrier film, wherein the coating thickness is 20-40 mu m, and the acrylic resin with high crosslinking degree is coated;

and thirdly, selecting an ultra-light PET release film, wherein the release force requirement is less than 5 g/inch. And coating a UV blocking layer on the release coating, baking for 1-2 minutes at 120 ℃, then attaching the UV hardening layer made in the second step, rolling, aging in a baking oven at 50 ℃ for 24 hours, and bonding the UV hardening layer and the UV blocking layer together. The UV blocking layer is polymethyl methacrylate coating, 0.2-2% of ultraviolet light absorber is added, and the main component of the ultraviolet light absorber is hexamethylphosphoric triamide;

and fourthly, coating a printable coating on the UV blocking layer. The printable coating is polymethyl methacrylate coating, three solvents of ethyl acetate, butanone and IPA are mixed according to the ratio of 6:3:1, the mixture is diluted to the solid content of 16.5-21%, and the mixture is coated by a 100-mesh micro-concave roller, and the coating thickness is 1-3 mu m;

fifthly, printing textures or patterns on the printable coating surface by adopting an offset printing mode;

and sixthly, coating a film on the printing layer, and coating a film which has metal texture and does not influence mobile phone signals, such as Si alloy series (black) and In alloy series (white) on the printing layer by adopting a magnetron sputtering method.

The utility model discloses a but 3D cell-phone backshell decorating film of shaping back UV sclerosis earlier, its UV sclerosis layer is in the state of solidifying in advance, has good thermoplasticity in 3D cell-phone shell course of working, and the elongation can reach 300%, can do the curved shaping of big camber heat, has certain intensity and heat resistance simultaneously, can be at cross cutting, preforming, keeps the outward appearance stability in the course of working such as moulding plastics. After injection molding process accomplished, through the UV passageway, UV sclerosis layer can the secondary cure sclerosis, stereotypes, and at this moment, the carrier membrane can easily be peeled off, obtains the 3D cell-phone backshell of hardness more than 6H.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a can be earlier shaping 3D cell-phone backshell decorating film of UV sclerosis afterwards, includes a carrier membrane, its characterized in that: be provided with UV sclerosis layer on the one side of carrier membrane, the another side on UV sclerosis layer is provided with the UV barrier layer, the another side of UV barrier layer has set gradually printable coating, printing layer and plating layer.

2. The 3D phone back shell decoration film capable of being molded before UV cured according to claim 1, wherein: the carrier film takes PET, PP and PMMA plastic films as base materials, and a release film layer is coated on one surface of the carrier film, which is in contact with the UV hardening layer.

3. The 3D phone back shell decoration film capable of being molded before UV cured according to claim 1, wherein: the UV hardening layer is an acrylic resin coating layer, and the thickness of the UV hardening layer is 20-40 μm.

4. The 3D phone back shell decoration film capable of being molded before UV cured according to claim 1, wherein: the UV blocking layer is a coating formed by adding 0.2-2% of ultraviolet absorber into polymethyl methacrylate.

5. The 3D phone back shell decoration film capable of being molded before UV cured according to claim 1, wherein: the printable coating is a coating formed by polymethyl methacrylate, and the thickness of the printable coating is 1-3 mu m.

6. The 3D phone back shell decoration film capable of being molded before UV cured according to claim 1, wherein: the electroplated layer is a Si alloy series or In alloy series film formed on the printing layer through magnetron sputtering.

7. The 3D phone back shell decoration film capable of being molded before UV cured according to claim 2, wherein: the thickness of the PET, PP and PMMA substrate is 50-100 mu m, the light transmittance is more than 91%, and the glossiness is more than 150%.