Glass fiber mobile phone rear cover with double-texture effect

Abstract

The utility model discloses a glass fiber mobile phone rear cover with a double-texture effect. The glass fiber mobile phone rear cover comprises a hardened layer, wherein one surface of the hardened layer is provided with an uneven outer texture layer; the inner texture layer is arranged on the side, away from the outer texture layer, of the hardened layer; the PVD layer is arranged on the side, away from the hardened layer, of the inner texture layer; the effect ink layer is arranged on the side, away from the hardened layer, of the PVD layer; the bottom covering layer is arranged on the side, away from the hardened layer, of the effect ink layer; the bonding layer is arranged on the side, away from the hardened layer, of the cover bottom layer; the 3D glass fiber plate is arranged on the side, away from the hardened layer, of the bonding layer. The glass fiber mobile phone rear cover provided by the utility model not only has better hardness and wear resistance, but also realizes clear presentation of double texture effects, and has stronger stereoscopic impression, so that the performance of the glass fiber mobile phone rear cover in high-end application is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mobile phone back cover, especially relates to a glass fiber mobile phone back cover with double texture effect. BACKGROUND

[0002] With the development of technology and the higher demand of consumers for portable electronic products, lighter and thinner requirements are put forward for structural parts such as back cover, so more materials with density below 2.0 and modulus above 30GPa or even 50GPa are developed for manufacturing mobile phone back cover, and fiber reinforced composite materials represented by glass cloth reinforced epoxy resin material emerge as the times require, and among many glass plate mobile phone back covers, glass plate mobile phone back cover with texture effect, especially double texture effect, becomes the focus of ID / CMF design of many terminal brands.

[0003] At present, the typical structure of the glass plate mobile phone back cover 100' with double texture effect is shown in the figure Figure 1 , which is stacked by multiple layers of materials, specifically including: a glass plate 11' with a thickness of 0.3-0.5mm, a first primer layer 12' of 8-12µm, a basecoat layer 13' of 15-20µm, a UV coating layer 14' of 15-25µm, a PVD layer 15' of 30-300nm, a second primer layer 16' of 3-6µm, a midcoat layer 17' of 5-8µm, and a UV topcoat layer 18' of 18-25µm, wherein inner texture 19' and outer texture 20' are formed on the UV coating layer 14' and the UV topcoat layer 18' respectively by the transfer printing process to achieve the double texture effect. However, this structure has the following problems: first, the performance of the midcoat layer 17' and the UV topcoat layer 18' in improving the hardness and wear resistance of the product is insufficient, resulting in that the hardness of the glass plate mobile phone back cover with double texture effect is usually only 2H, and the wear resistance is represented by the abrasion after 100 times of 500g force under steel wool test. Second, the PVD layer 15' is located above the inner texture layer 19', which will have a certain covering effect on the inner texture, especially when thick plating film or bright silver process is used, this problem is more obvious, which affects the clarity and visual effect of the inner texture. These problems limit the performance of this structure in the application of high-end mobile phone back cover.

[0004] Therefore, there is an urgent need for a glass fiber mobile phone back cover with double texture effect to solve the problems of the prior art. CONTENT OF THE UTILITY MODEL

[0005] In view of the above problems, the purpose of the utility model is to provide a glass fiber mobile phone back cover with double texture effect, which not only has good hardness and wear resistance, but also realizes clear presentation of double texture effect and stronger three-dimensional effect.

[0006] To achieve the above object, the utility model provides a kind of double texture effect's glass fibre mobile phone back cover, comprising: hardening layer, the surface of hardening layer has uneven outer texture layer;Inner texture layer, inner texture layer is located at the side of hardening layer away from outer texture layer;PVD layer, PVD layer is located at the side of inner texture layer away from hardening layer;Effect ink layer, effect ink layer is located at the side of PVD layer away from hardening layer;Cover bottom layer, cover bottom layer is located at the side of effect ink layer away from hardening layer;Bonding layer, bonding layer is located at the side of cover bottom layer away from hardening layer;3D glass fibre plate, 3D glass fibre plate is located at the side of bonding layer away from hardening layer.

[0007] Compared with prior art, the utility model sets up hardening layer in the outermost layer of glass fibre mobile phone back cover, and uneven outer texture layer is directly formed on the outer surface of hardening layer, hardening layer has high hardness, so as to can significantly improve the overall hardness and wear resistance of glass fibre mobile phone back cover, effectively solve the problem of low hardness and poor wear resistance caused by the performance deficiency of traditional structure in middle coating and UV finish layer.Meanwhile, the position of PVD layer is adjusted, which is arranged below inner texture layer instead of above inner texture layer in traditional structure, which avoids the direct covering of PVD layer on inner texture, especially under thick plating film or bright silver process, the clarity and visual effect of inner texture are completely preserved.In addition, effect ink layer is added below PVD layer, which not only further enhances the performance effect of inner texture, but also provides a better adhesion basis for PVD layer, ensuring that inner texture is not affected.Therefore, the glass fibre mobile phone back cover of the utility model not only has good hardness and wear resistance, but also realizes the clear presentation of double texture effect, has stronger three-dimensional feeling, and further improves the performance of glass fibre mobile phone back cover in high-end applications.

[0008] The thickness of the hardening layer of the utility model is 18~25µm.The hardening layer with this thickness range can provide sufficient surface hardness and wear resistance, ensuring that the glass fibre mobile phone back cover is not easy to scratch or wear during daily use, prolonging the service life.

[0009] The pencil hardness of the hardening layer of the utility model is not less than 3H.The pencil hardness of 3H and above meets the strict requirements of high-end electronic products (such as mobile phones) on surface hardness.

[0010] The thickness of the inner texture layer of the utility model is 12~18nm.Through the design of nanoscale thickness, a fine inner texture structure can be constructed to achieve unique gloss changes or color effects, significantly enhancing the texture of the glass fibre mobile phone back cover.

[0011] The thickness of the PVD layer of the utility model is 30~300nm.The PVD layer with this thickness range can provide better metal texture.Specifically, the thickness can be adjusted according to requirements to achieve different visual effects.

[0012] The thickness of the effect ink layer is 6-8 µm. The effect ink layer in this thickness range can achieve excellent color, pattern or optical effects, and enhance the appearance and visual appeal of the product.

[0013] The thickness of the cover bottom layer is 18-24 µm. The cover bottom layer in this thickness range is used to provide uniform base color or covering effect, and ensure that the effect ink layer of the upper layer has good stability.

[0014] The thickness of the adhesive layer is 6-8 µm. The adhesive layer in this thickness range can ensure the firmness and stability of the glass fiber mobile phone back cover, and prevent delamination or peeling.

[0015] The thickness of the 3D glass fiber plate is 0.3-0.5 mm. The 3D glass fiber plate in this thickness range

[0016] can balance the lightweight and strength requirements.

[0017] The arrangement period of the outer texture layer is 5-20 mm. Through the periodic arrangement of the texture, specific tactile and visual effects are achieved, and the user experience of the product is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of a glass fiber plate mobile phone back cover with a double-texture effect in the prior art.

[0019] Figure 2 is a structural schematic view of a glass fiber mobile phone back cover with a double-texture effect of the present application. DETAILED DESCRIPTION

[0020] To explain the technical content, structural features, purposes and effects of the present application in detail, the following will be described in detail in combination with the embodiments and the accompanying drawings.

[0021] Please refer to Figure 1The utility model provides a kind of glass fibre mobile phone back cover 100 with double texture effect, including hardening layer 11, inner texture layer 13, PVD layer 14, effect ink layer 15, cover bottom layer 16, adhesive layer 17, 3D glass fibre plate 18, wherein the surface of hardening layer 11 has uneven outer texture layer 12, outer texture layer 12 can bring touch texture to glass fibre mobile phone back cover 100 to satisfy the appeal of the appearance of a variety of product individualization promotion;Inner texture layer 13 is located in the side of hardening layer 11 away from outer texture layer 12, PVD layer 14 is located in the side of inner texture layer 13 away from hardening layer 11, effect ink layer 15 is located in the side of PVD layer 14 away from hardening layer 11, cover bottom layer 16 is located in the side of effect ink layer 15 away from hardening layer 11, adhesive layer 17 is located in the side of cover bottom layer 16 away from hardening layer 11, 3D glass fibre plate 18 is located in the side of adhesive layer 17 away from hardening layer 11.The utility model sets up hardening layer 11 in the outermost layer of glass fibre mobile phone back cover 100, and uneven outer texture layer 12 is directly formed on the outer surface of hardening layer 11, hardening layer 11 is made of high-hardness material, so hardening layer 11 has high hardness to be able to significantly improve the overall hardness and wear resistance of glass fibre mobile phone back cover 100, effectively solve the problem of low hardness and poor wear resistance caused by the performance deficiency of traditional structure in middle coating and UV finish layer.Meanwhile, the position of PVD layer 14 is adjusted, which is arranged below inner texture layer 13 instead of above inner texture layer 13 in traditional structure, which avoids the direct covering of PVD layer 14 to inner texture, especially under thick plating film or bright silver process, the definition and visual effect of inner texture are completely preserved.In addition, effect ink layer 15 is added below PVD layer 14, which not only further enhances the performance effect of inner texture layer 13, but also provides a better attachment basis for PVD layer 14, ensuring that inner texture layer 13 is not affected.

[0022] Please continue to see Figure 1 The thickness of the hardening layer 11 is 18-25 µm. Specifically, the thickness of the hardening layer 11 can be selected according to requirements, including but not limited to 18 µm, 19 µm, 20 µm, 21 µm, 22 µm, 23 µm, 24 µm, 25 µm. More specifically, a roll-to-roll transfer process and UV release adhesive can be used to form a release layer with release effect on the substrate; then a double-cured hardening liquid is uniformly coated on the release layer by coating process and pre-hardening layer 11 is formed after pre-hardening treatment. The thickness of the substrate can be 0.1-0.2 mm; the substrate can be a PET film or a PO film; the UV release adhesive and the double-cured hardening liquid are well known to those skilled in the art and can be obtained commercially; for example, the UV release adhesive can be Loctite® 3526 UV release adhesive from Henkel; the double-cured hardening liquid can be Scotch-Weld DP 810 from 3M. ™2216 dual cure hardening fluid.

[0023] Specifically, in a preferred embodiment, the pencil hardness of the hardening layer 11 is not less than 3H (using Mitsubishi pencil, 750g force test); in another preferred embodiment, the hardening layer 11 can withstand 500 times or more of 0000# steel wool abrasion test under the action of 1KG external force, showing excellent abrasion resistance.

[0024] Please continue to refer to Figure 1 , the thickness of the inner texture layer 13 is 12-18nm. Specifically, the thickness of the inner texture layer 13 can be selected according to requirements, including but not limited to 12nm, 13nm, 14nm, 17nm, 18nm. More specifically, the inner texture layer 13 can be formed on the pre-hardening layer 11 by a roll-to-roll transfer process and using UV transfer glue. The UV transfer glue is well known to those skilled in the art and is commercially available, such as Loctite® 3526 UV transfer glue of Henkel. The inner texture layer 13 is used to achieve specific visual effects, such as 3D stereoscopic effect, frosted texture.

[0025] Please continue to refer to Figure 1 , the thickness of the PVD layer 14 is 30-300nm; specifically, the thickness of the PVD layer 14 can be selected according to requirements, including but not limited to 30nm, 50nm, 80nm, 100nm, 110nm, 130nm, 150nm, 180nm, 200nm, 230nm, 250nm, 270nm, 285nm, 300nm. More specifically, the PVD layer 14 can be deposited on the inner texture layer 13 by a roll-to-roll plating process and magnetron sputtering, and the PVD layer 14 can achieve specific optical properties, such as anti-reflection, reflection, color adjustment, etc. More specifically, the PVD layer 14 can be ZrO x / SiO y / NbO z .

[0026] Please continue to refer to Figure 1 , the thickness of the effect ink layer 15 is 6-8pm; the thickness of the effect ink layer 15 can be selected according to requirements, including but not limited to 6pm, 6.5pm, 7pm, 7.5pm, 8pm. More specifically, the effect ink is printed on the PVD layer 14 by a roll-to-roll screen printing process to form the effect ink layer 15; the effect ink refers to ink with special visual effects or functions, such as metallic luster, pearlescent, fluorescent, thermochromic, photochromic, etc.; those skilled in the art can select the type of effect ink according to actual needs, and the required effect ink is commercially available; such as EkoCure ® metallic ink, with excellent metallic effect and adhesion.

[0027] Please continue to refer to Figure 1 The thickness of the undercoat layer 16 is 18-24 pm; the thickness of the undercoat layer 16 can be selected according to requirements, including but not limited to 18 pm, 19 pm, 20 pm, 21 pm, 22 pm, 23 pm, 24 pm. More specifically, the undercoat ink is silk-screen printed on the effect ink layer 15 by a roll-to-roll silk-screen printing process to form the undercoat layer 16. The undercoat ink used is well known to those skilled in the art and is directly available through market channels; such as the Suncure® series of white undercoat inks of Sun Chemical, suitable for UV curing process, with high hiding power and adhesion.

[0028] Please continue to refer to Figure 1 The thickness of the adhesive layer 17 is 6-8 pm; the thickness of the adhesive layer 17 can be selected according to requirements, including but not limited to 6 pm, 7 pm, 7.5 pm, 8 pm. More specifically, the adhesive ink is silk-screen printed on the undercoat layer 16 by a roll-to-roll silk-screen printing process to form the adhesive layer 17. The adhesive ink used is well known to those skilled in the art and is directly available through market channels; such as Loctite EA 9396 epoxy resin ink of Henkel Company, with excellent adhesive strength and chemical resistance; such as Scotch-Weld 2216 acrylic adhesive ink of 3M Company, with the characteristics of fast curing and high strength.

[0029] Please continue to refer to Figure 1, the thickness of the 3D glass fiber plate 18 is 0.3-0.5mm; the thickness of the 3D glass fiber plate 18 can be selected according to requirements, including but not limited to 0.3mm, 0.4mm, 0.5mm. In a preferred embodiment, the 3D glass fiber plate 18 can be bonded with the adhesive layer 17 by mold hot pressing, specifically, the composite film with the substrate, the release layer, the pre-hardening layer 11, the inner texture layer 13, the PVD layer 14, the effect ink layer 15, the cover bottom layer 16, the adhesive layer 17 and the glass fiber plate can be placed in a mold, the mold is divided into an upper mold and a lower mold, the glass fiber plate is located in the lower mold, the composite film is located in the upper mold and the adhesive layer 17 of the composite film is close to the glass fiber plate, the surface of the upper mold is processed to form a third texture by laser or chemical etching process, the depth of the third texture is 40-120 microns, and the arrangement period of the third texture is 5-20mm; during the hot pressing process, not only the bonding of the glass fiber plate and the adhesive layer 17 is realized, but also the glass fiber plate and the composite film are formed into 2D or 3D morphology, and the third texture is transferred to the pre-hardening layer 11, after the hot pressing is finished, the substrate and the release layer are torn off, the pre-hardening layer 11 is secondarily cured to finally form the hardening layer 11. In a preferred embodiment, the 3D glass fiber plate 18 can be bonded on the adhesive layer 17 by an adhesive; specifically, the composite film with the substrate, the release layer, the pre-hardening layer 11, the inner texture layer 13, the PVD layer 14, the effect ink layer 15, the cover bottom layer 16, the adhesive layer 17 can be placed in the upper mold of the mold and the adhesive layer 17 of the composite film is away from the upper mold, the surface of the upper mold is processed to form a third texture by laser or chemical etching process, the depth of the third texture is 40-120 microns, and the arrangement period of the third texture is 5-20mm; during the hot pressing process, the composite film is formed into 3D morphology and the third texture is transferred to the pre-hardening layer 11; after the hot pressing is finished, the adhesive is coated on the adhesive layer 17 and the 3D glass fiber plate 18 is bonded on the adhesive, and then the substrate and the release layer are torn off and the pre-hardening layer 11 is secondarily cured to finally form the hardening layer 11.

[0030] The above only discloses preferred embodiments of the present application, and of course cannot limit the scope of the present application, therefore, equivalent changes made within the scope of the present application still fall within the scope of the present application.

Claims

1. A glass mobile phone back cover with dual texture effect, characterized in that, Comprising: a hardening layer having an outer textured layer with unevenness on one surface thereof; an inner textured layer provided on a side of the hardening layer distal from the outer textured layer; a PVD layer provided on a side of the inner textured layer distal from the hardening layer; an effect ink layer provided on a side of the PVD layer distal from the hardening layer; a cover base layer provided on a side of the effect ink layer distal from the hardening layer; a bonding layer provided on a side of the cover base layer distal from the hardening layer; a 3D glass fiber plate provided on a side of the bonding layer distal from the hardening layer.

2. The glass mobile phone back cover with dual texture effect according to claim 1, characterized in that, The hardening layer has a thickness of 18-25 µm.

3. The glass mobile phone back cover with dual texture effect according to claim 1, wherein, The hardening layer has a pencil hardness of not less than 3H.

4. The glass mobile phone back cover with dual texture effect of claim 1, wherein, The inner textured layer has a thickness of 12-18 nm.

5. The glass mobile phone back cover with dual texture effect of claim 1, wherein, The PVD layer has a thickness of 30-300 nm.

6. The glass mobile phone back cover with dual texture effect of claim 1, wherein, The effect ink layer has a thickness of 6-8 µm.

7. The glass mobile phone back cover with dual texture effect of claim 1, wherein, The cover base layer has a thickness of 18-24 µm.

8. The glass mobile phone back cover with dual texture effect of claim 1, wherein, The bonding layer has a thickness of 6-8 µm.

9. The glass mobile phone back cover with dual texture effect of claim 1, wherein, The 3D glass fiber plate has a thickness of 0.3-0.5 mm.

10. The glass mobile phone back cover with dual texture effect of claim 1, wherein, The outer textured layer has an arrangement period of 5-20 mm.

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