Mobile phone shell back mark printing process with wear-resistant hand feeling effect

Abstract

The invention belongs to the technical field of ink printing, and particularly relates to a mobile phone shell back mark printing process with a wear-resistant hand feeling effect, which comprises the following steps: providing a mobile phone shell PC board base material; printing a bonding layer on the outer surface of the PC board base material of the mobile phone shell; the silica gel identification layer is printed on the bonding layer in a heat transfer printing mode, the raw material of the silica gel identification layer is wear-resistant hand feeling silica gel ink, and the wear-resistant hand feeling silica gel ink is prepared from, by weight, 50-70 parts of modified acrylic resin, 10-15 parts of pigment, 2-3 parts of defoaming agent, 1.8-3.0 parts of dispersing agent, 1.8-3.0 parts of flatting agent, 20-30 parts of deionized water and 15-22 parts of ethyl alcohol; and S400, a transparent film layer is printed on the silica gel identification layer. The wear-resistant silica gel ink forms the silica gel identification layer with 3D and other protruding effects on the PC board base material of the mobile phone shell through the heat transfer printing technology, the hand feeling is improved, and the wear-resistant effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ink printing, and particularly relates to a printing process for a mobile phone shell back logo with wear-resistant touch effect. BACKGROUND

[0002] In order to improve the appearance of the mobile phone shell back, it is usually necessary to involve more advanced design. Therefore, it is common to set patterns or lines such as logos and trademarks on the shell of the mobile phone. The current method usually adopts one-piece injection molding, and directly reflects the mobile phone shell back through double or multi-color methods. However, the mobile phone shell is usually flat, and the patterns or lines such as logos and trademarks cannot form a 3D or other raised effect, which cannot meet the user's pursuit of the raised touch of the mobile phone shell back. If the patterns or lines such as logos and trademarks on the mobile phone shell back are directly formed into a raised effect during injection molding, the mobile phone shell back will have poor wear resistance and burrs and burrs, which need to be solved. SUMMARY

[0003] The present application provides a printing process for a mobile phone shell back logo with wear-resistant touch effect, which forms a silicone logo layer with a 3D or other raised effect on a mobile phone shell PC plate substrate by printing wear-resistant touch silicone ink, thereby improving the logo touch effect of the entire mobile phone shell back. Moreover, the talc powder of the wear-resistant touch silicone ink is subjected to surface modification treatment, so that it has good compatibility with the ink components such as acrylic resin. The modified talc powder can be uniformly dispersed in the ink, avoiding the occurrence of agglomeration and sedimentation, thereby ensuring the stability and printing effect of the wear-resistant touch silicone ink, and significantly improving the wear resistance and touch of the wear-resistant touch silicone ink. The printed product not only maintains the beauty, but also has better durability and comfort.

[0004] To achieve the above-mentioned purpose, the printing process for a mobile phone shell back logo with wear-resistant touch effect provided by the embodiments of the present application comprises the following steps:

[0005] S100: providing a mobile phone shell PC plate substrate;

[0006] S200: printing an adhesive layer on the outer surface of the mobile phone shell PC plate substrate;

[0007] S300: printing a silicone logo layer on the adhesive layer by heat transfer printing, wherein the raw material of the silicone logo layer is wear-resistant touch silicone ink, and the wear-resistant touch silicone ink comprises the following components by weight fraction: modified acrylic resin 50-70 parts, pigment 10-15 parts, defoaming agent 2-3 parts, dispersing agent 1.8-3.0 parts, leveling agent 1.8-3.0 parts, deionized water 20-30 parts, and ethanol 15-22 parts;

[0008] S400: printing a transparent film layer above the silicone identification layer.

[0009] As a preferred technical solution of the present application, in step S300, the modified acrylic resin is prepared by the following steps:

[0010] S310: glycidyl methacrylate, sucrose fatty acid ester and isobutyl alcohol are mixed and dispersed to obtain a mixed solution;

[0011] S320: after the acrylic monomer, functional filler, sodium dodecyl sulfate, initiator and deionized water are mixed and dispersed and preheated, the mixed solution is slowly added and stirred at constant temperature, cooled, and the pH value is adjusted to obtain the modified acrylic resin.

[0012] As a preferred technical solution of the present application, in step S310, the mass ratio of glycidyl methacrylate, sucrose fatty acid ester and isobutyl alcohol is 6-8:1.5-1.8:3-4;

[0013] In step S320, the mass ratio of the acrylic monomer, functional filler, sodium dodecyl sulfate, initiator, deionized water and mixed solution is 50-55:8-10:1.5-2.1:0.5-0.6:25-30:10-13.

[0014] As a preferred technical solution of the present application, in step S320, the preheating is heated to 60-65℃; the constant temperature stirring is stirred at 65-70℃ for 1.5-2.0h; the cooling is cooled to 40-45℃; the pH value is adjusted to 7.5; the acrylic monomer is composed of methyl methacrylate, ethyl methacrylate and hydroxyethyl acrylate in a mass ratio of 6.5-7.2:11-13:0.8-1.2.

[0015] As a preferred technical solution of the present application, the functional filler is prepared by the following steps:

[0016] S321: the talc powder is added to anhydrous ethanol and mixed uniformly, silane coupling agent is added and stirred, the solvent is removed by rotary evaporation, washed, vacuum dried in an oven to obtain silane modified talc powder;

[0017] S322: the silane modified talc powder, methyl methacrylate and anhydrous ethanol are mixed, the initiator is added and heated to polymerize, the solid is taken out by centrifugation, washed, and vacuum dried in an oven to obtain a pre-prepared filler;

[0018] S323: after the cinnamyl alcohol, p-aminophenylthiol and anhydrous ethanol are ultrasonically mixed, the product is washed with water after ultraviolet irradiation treatment with photoinitiator, dried to obtain a modified monomer;

[0019] S324: the modified monomer is added into isobutyl alcohol and mixed, the pre-prepared filler is added and constant temperature stirring is carried out, filtration is carried out, cleaning is carried out, and after vacuum drying in an oven, the functional filler is obtained.

[0020] As a preferred technical solution of the present application, in S321, the mass ratio of the talc powder, anhydrous ethanol and silane coupling agent is 20-23:70-80:5.2-6.5; the silane coupling agent is vinyl trimethoxysilane; the temperature stirring is stirring at 55-65℃ for 6-8h; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 70℃ until constant weight.

[0021] As a preferred technical solution of the present application, in step S322, the mass ratio of the silane modified talc powder, methyl acrolein, anhydrous ethanol and initiator is 18-20:2.1-2.5:50-60:0.14-0.16; the heating polymerization is stirring at 70-75℃ for 10-12h; the cleaning is cleaning with anhydrous ethanol for 4 times; and the vacuum drying is vacuum drying at 60℃ until constant weight.

[0022] As a preferred technical solution of the present application, in step S323, the mass ratio of the cinnamyl alcohol, p-aminophenylthiol, anhydrous ethanol and photoinitiator is 3.2-3.6:2.1-2.4:15-20:0.15-0.16; the ultrasonic mixing is ultrasonic mixing at 400-600W power for 10-15min; and the ultraviolet irradiation treatment is reaction under 365nm ultraviolet light irradiation for 6-8h.

[0023] As a preferred technical solution of the present application, in step S324, the mass ratio of the modified monomer, isobutyl alcohol and pre-prepared filler is 2.1-2.5:70-80:20-22; the constant temperature stirring is stirring at 42-50℃ for 5-6h; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 80℃ until constant weight.

[0024] The mobile phone shell back identification printing process with wear-resistant hand feeling effect provided by the embodiment of the application at least has one of the following technical effects: the mobile phone shell back identification printing process with wear-resistant hand feeling effect in the application can form a 3D or other raised effect silicone identification layer on the back of the mobile phone shell through a specific preparation process, wherein the silicone identification layer uses wear-resistant hand feeling silicone ink as raw material, the talc powder in the wear-resistant hand feeling silicone ink is subjected to surface modification treatment, and the talc powder has good compatibility with ink components such as acrylic resin. The modified talc powder can be uniformly dispersed in the ink, avoiding the occurrence of agglomeration and sedimentation, thereby ensuring the stability and printing effect of the ink and significantly improving the wear resistance and hand feeling of the ink, so that the printed matter not only maintains the aesthetic appearance but also has better durability and comfort. That is, the logo, trademark and other patterns with raised effects formed on the back of the mobile phone shell have good wear-resistant hand feeling. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the application to achieve the predetermined application purposes, the specific embodiments, structures, features and effects according to the application are described in detail below.

[0026] The mobile phone shell back identification printing process with wear-resistant hand feeling effect provided by the application comprises the following steps:

[0027] S100: providing a mobile phone shell PC plate substrate;

[0028] S200: printing an adhesive layer on the outer surface of the mobile phone shell PC plate substrate;

[0029] S300: printing a silicone identification layer on the adhesive layer by heat transfer printing, wherein the required pattern can be printed on the heat transfer paper (for example, the heat transfer paper can be a polypropylene material paper) by a heat transfer printer first, wherein the raw material of the silicone identification layer is wear-resistant hand feeling silicone ink, the wear-resistant hand feeling silicone ink is printed on the heat transfer paper to form a specific 3D or other raised effect, and then the heat transfer paper is transferred to the adhesive layer formed on the mobile phone shell PC plate substrate by a hot stamping machine to form the identification on the back of the mobile phone shell; the adhesive layer can use hot melt adhesive;

[0030] The wear-resistant hand feeling silicone ink comprises the following components by weight fraction: modified acrylic resin 50-70 parts, pigment 10-15 parts, defoaming agent 2-3 parts, dispersing agent 1.8-3.0 parts, leveling agent 1.8-3.0 parts, deionized water 20-30 parts and ethanol 15-22 parts;

[0031] S400: printing a transparent film layer above the silicone identification layer, which can adopt a TPE or TPU material layer.

[0032] The purpose of the present application is to provide a mobile phone shell back identification printing process with wear-resistant hand feeling effect, which forms a silicone identification layer with 3D or convex effect on the mobile phone shell PC plate substrate by printing wear-resistant hand feeling silicone ink, improving the identification hand feeling effect of the whole mobile phone shell back. The key is that the formed 3D or convex silicone identification layer can also realize wear resistance, which is much better than the mobile phone shell with pattern or other identification directly injection molded in hand feeling and wear-resistant effect.

[0033] It needs to be further explained that the wear resistance of the cured acrylic ink ensures that the logo or trademark is not easy to be worn or scratched, thereby maintaining the overall beauty and brand value of the printed matter. In addition, the environmental protection and good adhesion of the acrylic ink are also important reasons for its wide application in these applications. As an important additive, talc plays a crucial role in acrylic ink. It not only can improve the wear resistance of the ink, but also can give the ink a more delicate hand feeling. Adding an appropriate amount of talc to the ink can form a more solid coating after curing, thereby effectively resisting external wear and scratches. However, the compatibility of talc with acrylic ink has always been a key factor restricting its wide application in ink.

[0034] Since the present application modifies the surface of the talc in the wear-resistant hand feeling silicone ink, it has good compatibility with the ink components such as acrylic resin, and the modified talc can be uniformly dispersed in the ink, avoiding the occurrence of agglomeration and sedimentation, thereby ensuring the stability and printing effect of the wear-resistant hand feeling silicone ink, and significantly improving the wear resistance and hand feeling of the wear-resistant hand feeling silicone ink. The printed matter not only maintains its beauty, but also has better durability and comfort. The following specific embodiments of a mobile phone shell back identification printing process with wear-resistant hand feeling effect provided by the present application are described.

[0035] Embodiment 1.

[0036] The mobile phone shell back identification printing process with wear-resistant hand feeling effect of the present embodiment comprises the following steps:

[0037] S100: providing a mobile phone shell PC plate substrate;

[0038]

[0039] ​S300: printing a silica gel mark layer on the adhesive layer by thermal transfer printing, raw materials of the silica gel mark layer are wear-resistant touch silica gel ink, the wear-resistant touch silica gel ink comprises the following components in parts by weight: modified acrylic resin 50 parts, pigment 10 parts, defoaming agent 2 parts, dispersing agent 1.8 parts, leveling agent 1.8 parts, deionized water 20 parts and ethanol 15 parts;

[0040] The pigment is titanium white powder; the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether; the dispersing agent is prepared by mixing sodium dodecyl sulfate and oleic acid amide at a mass ratio of 2.0:1.0; and the leveling agent is polydimethylsiloxane.

[0041] The preparation method of the modified acrylic resin comprises the following steps:

[0042] S310: mixing and dispersing glycidyl methacrylate, sucrose fatty acid ester and isobutyl alcohol to obtain a mixed solution; wherein the mass ratio of the glycidyl methacrylate, the sucrose fatty acid ester and the isobutyl alcohol is 6:1.5:3;

[0043] S320: mixing and dispersing acrylic monomers, functional fillers, sodium dodecyl sulfate, an initiator and deionized water, preheating to 60 DEG C, slowly adding the mixed solution, stirring at 65 DEG C for 1.5 h, cooling to 40 DEG C, adjusting the pH value to 7.5 to obtain the modified acrylic resin; wherein the mass ratio of the acrylic monomers, the functional fillers, the sodium dodecyl sulfate, the initiator, the deionized water and the mixed solution is 50:8:1.5:0.5:25:10; the initiator is ammonium persulfate; and the acrylic monomers are composed of methyl methacrylate, ethyl methacrylate and hydroxyethyl acrylate at a mass ratio of 6.5:11:0.8.

[0044] The preparation method of the functional filler comprises the following steps:

[0045] S321: mixing talcum powder in anhydrous ethanol, adding a silane coupling agent, heating to 55 DEG C, stirring for 6 h, removing the solvent by rotary evaporation, washing with anhydrous ethanol for 3 times, and vacuum drying in an oven at 70 DEG C to constant weight to obtain silane-modified talcum powder; wherein the mass ratio of the talcum powder, the anhydrous ethanol and the silane coupling agent is 20:70:5.2; and the silane coupling agent is vinyltrimethoxysilane;

[0046] S322: mixing the silane-modified talcum powder, methacrylaldehyde and anhydrous ethanol, adding an initiator, stirring at 70 DEG C for 10 h, centrifuging to obtain solid, washing with anhydrous ethanol for 4 times, and vacuum drying in an oven at 60 DEG C to constant weight to obtain a pre-prepared filler; wherein the mass ratio of the silane-modified talcum powder, the methacrylaldehyde, the anhydrous ethanol and the initiator is 18:2.1:50:0.14; and the initiator is azobisisobutyronitrile;

[0047] S323: After cinnamyl alcohol, p-aminophenylthiol and anhydrous ethanol are ultrasonicated at a power of 400W for 10min, a photoinitiator is added, and the reaction is carried out under irradiation of 365nm ultraviolet light for 6h. After the product is washed with water for 3 times, dried with anhydrous magnesium sulfate, a modified monomer is obtained. The mass ratio of the cinnamyl alcohol, p-aminophenylthiol, anhydrous ethanol and photoinitiator is 3.2:2.1:15:0.15. The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone;

[0048] S324: The modified monomer is uniformly mixed with isobutyl alcohol, and pre-prepared filler is added and stirred at 42℃ for 5h. After filtration, the product is washed with anhydrous ethanol for 3 times, and dried in an oven at 80℃ under vacuum until constant weight to obtain functional filler. The mass ratio of the modified monomer, isobutyl alcohol and pre-prepared filler is 2.1:70:20.

[0049] S400: A transparent film layer is printed on the silicone identification layer.

[0050] Further, the preparation method of the wear-resistant hand feeling silicone ink comprises the following steps: mixing modified acrylic resin, deionized water, ethanol, pigment, defoaming agent, dispersant and leveling agent, stirring at a speed of 300rpm for 30min, and grinding to obtain the product.

[0051] Example 2.

[0052] The mobile phone shell back identification printing process with wear-resistant hand feeling effect comprises the following steps:

[0053] S100: A mobile phone shell PC plate substrate is provided.

[0054] S200: An adhesive layer is printed on the outer surface of the mobile phone shell PC plate substrate.

[0055] S300: A silicone identification layer is printed on the adhesive layer by thermal transfer printing. The raw material of the silicone identification layer is wear-resistant hand feeling silicone ink. The wear-resistant hand feeling silicone ink comprises the following components in parts by weight: modified acrylic resin 60 parts, pigment 12 parts, defoaming agent 2.5 parts, dispersant 2.4 parts, leveling agent 2.4 parts, deionized water 25 parts and ethanol 18 parts.

[0056] The pigment is titanium white. The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether. The dispersant is obtained by mixing sodium dodecyl sulfate and oleic acid amide at a mass ratio of 2.4:1.2. The leveling agent is polydimethylsiloxane.

[0057] The preparation method of the modified acrylic resin comprises the following steps:

[0058] S310: glycidyl methacrylate, sucrose fatty acid ester and isobutyl alcohol are mixed and dispersed to obtain a mixed solution; wherein the mass ratio of the glycidyl methacrylate, sucrose fatty acid ester and isobutyl alcohol is 7:1.6:3.5;

[0059] S320: after the acrylic monomer, functional filler, sodium dodecyl sulfate, initiator and deionized water are mixed and dispersed and preheated to 62℃, the mixed solution is slowly added and stirred at 68℃ for 1.8h, the temperature is reduced to 42℃, and after the pH value is adjusted to 7.5, a modified acrylic resin is obtained; wherein the mass ratio of the acrylic monomer, functional filler, sodium dodecyl sulfate, initiator, deionized water and mixed solution is 52:9:1.8:0.55:28:12; the initiator is ammonium persulfate; the acrylic monomer is composed of methyl methacrylate, ethyl methacrylate and hydroxyethyl acrylate in a mass ratio of 6.8:12:1.

[0060] The preparation method of the functional filler comprises the following steps:

[0061] S321: the talc powder is added into anhydrous ethanol and uniformly mixed, a silane coupling agent is added, the temperature is increased to 60℃ and stirred for 7h, the solvent is removed by rotary evaporation, washed with anhydrous ethanol for 3 times, and placed in an oven for vacuum drying at 70℃ until the weight is constant to obtain silane modified talc powder; wherein the mass ratio of the talc powder, anhydrous ethanol and silane coupling agent is 22:75:5.8; the silane coupling agent is vinyltrimethoxysilane;

[0062] S322: the silane modified talc powder, methyl methacrylate and anhydrous ethanol are uniformly mixed, an initiator is added, stirred at 72℃ for 11h, centrifuged to obtain solid, washed with anhydrous ethanol for 4 times, and placed in an oven for vacuum drying at 60℃ until the weight is constant to obtain a pre-prepared filler; wherein the mass ratio of the silane modified talc powder, methyl methacrylate, anhydrous ethanol and initiator is 19:2.3:55:0.15; the initiator is azobisisobutyronitrile;

[0063] S323: after the cinnamyl alcohol, p-aminophenylthiol and anhydrous ethanol are ultrasonically treated at 500W for 12min, a photoinitiator is added, and after irradiation under 365nm ultraviolet light for 7h, the product is washed with water for 3 times, dried with anhydrous magnesium sulfate to obtain a modified monomer; wherein the mass ratio of the cinnamyl alcohol, p-aminophenylthiol, anhydrous ethanol and photoinitiator is 3.4:2.2:18:0.155; the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone;

[0064] S324: The modified monomer is added into isobutyl alcohol and mixed, the pre-prepared filler is added and stirred at 46℃ for 5.5h, filtered, washed with anhydrous ethanol for 3 times, and dried in an oven at 80℃ under vacuum to constant weight to obtain the functional filler; wherein the mass ratio of the modified monomer, isobutyl alcohol and pre-prepared filler is 2.3:75:21.

[0065] S400: A transparent film layer is printed above the silica gel identification layer.

[0066] Further, the preparation method of the wear-resistant hand feeling silica gel ink comprises the following steps: mixing modified acrylic resin, deionized water, ethanol, pigment, defoaming agent, dispersant and leveling agent, stirring at 300rpm for 30min, and grinding to obtain the wear-resistant hand feeling silica gel ink.

[0067] Example 3.

[0068] The phone case back identification printing process with wear-resistant hand feeling effect comprises the following steps:

[0069] S100: A phone case PC plate substrate is provided.

[0070] S200: An adhesive layer is printed on the outer surface of the phone case PC plate substrate.

[0071] S300: A silica gel identification layer is printed on the adhesive layer by heat transfer printing, and the raw material of the silica gel identification layer is wear-resistant hand feeling silica gel ink, and the wear-resistant hand feeling silica gel ink comprises the following components by weight fraction: modified acrylic resin 70 parts, pigment 15 parts, defoaming agent 3 parts, dispersant 3.0 parts, leveling agent 3.0 parts, deionized water 30 parts and ethanol 22 parts.

[0072] The pigment is titanium white; the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether; the dispersant is prepared by mixing sodium dodecyl sulfate and oleic acid amide at a mass ratio of 2.8:1.3; and the leveling agent is polydimethylsiloxane.

[0073] The preparation method of the modified acrylic resin comprises the following steps:

[0074] S310: Glycerol methacrylate, sucrose fatty acid ester and isobutyl alcohol are mixed and dispersed to obtain a mixed solution; wherein the mass ratio of glycerol methacrylate, sucrose fatty acid ester and isobutyl alcohol is 8:1.8:4.

[0075] S320: After the acrylic monomer, functional filler, sodium dodecyl sulfate, initiator and deionized water are mixed, dispersed and preheated to 65 DEG C, the mixture is slowly added and stirred at 70 DEG C for 2.0h, the temperature is lowered to 45 DEG C, and the pH value is adjusted to 7.5 to obtain a modified acrylic resin; wherein the mass ratio of the acrylic monomer, functional filler, sodium dodecyl sulfate, initiator, deionized water and mixture is 55:10:2.1:0.6:30:13; the initiator is ammonium persulfate; the acrylic monomer is composed of methyl methacrylate, methyl methacrylate and hydroxyethyl acrylate in a mass ratio of 7.2:13:1.2.

[0076] The preparation method of the functional filler comprises the following steps:

[0077] S321: The talc powder is mixed in anhydrous ethanol, a silane coupling agent is added, the temperature is raised to 65 DEG C and stirred for 8h, the solvent is removed by rotary evaporation, washed with anhydrous ethanol for 3 times, and vacuum dried in an oven at 70 DEG C to constant weight to obtain silane modified talc powder; wherein the mass ratio of the talc powder, anhydrous ethanol and silane coupling agent is 23:80:6.5; the silane coupling agent is vinyl trimethoxysilane;

[0078] S322: The silane modified talc powder, methyl methacrylate and anhydrous ethanol are mixed, an initiator is added, stirred at 75 DEG C for 12h, centrifuged to obtain solid, washed with anhydrous ethanol for 4 times, and vacuum dried in an oven at 60 DEG C to constant weight to obtain a pre-prepared filler; wherein the mass ratio of the silane modified talc powder, methyl methacrylate, anhydrous ethanol and initiator is 20:2.5:60:0.16; the initiator is azobisisobutyronitrile;

[0079] S323: After the cinnamyl alcohol, p-aminophenylthiol and anhydrous ethanol are ultrasonicated at 600W power for 15min, a photoinitiator is added, and the reaction is carried out under 365nm ultraviolet light irradiation for 8h, the product is washed with water for 3 times, dried with anhydrous magnesium sulfate to obtain a modified monomer; wherein the mass ratio of the cinnamyl alcohol, p-aminophenylthiol, anhydrous ethanol and photoinitiator is 3.6:2.4:20:0.16; the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone;

[0080] S324: The modified monomer is mixed in isobutyl alcohol, the pre-prepared filler is added and stirred at 50 DEG C for 6h, filtered, washed with anhydrous ethanol for 3 times, and vacuum dried in an oven at 80 DEG C to constant weight to obtain a functional filler; wherein the mass ratio of the modified monomer, isobutyl alcohol and pre-prepared filler is 2.5:80:22.

[0081] S400: A transparent film layer is printed on the silica gel identification layer.

[0082] Further, the preparation method of the wear-resistant silicone ink includes the following steps: mixing modified acrylic resin, deionized water, ethanol, pigment, defoaming agent, dispersant and leveling agent, stirring at 300 rpm for 30 min, and grinding, to obtain the wear-resistant silicone ink.

[0083] The following further illustrates a printing process of a mobile phone shell back logo with wear-resistant touch effect according to the present application through a comparative example.

[0084] Comparative Example 1.

[0085] Comparative Example 1 is different from Example 3 in that methacrylic acid is used instead of glycidyl methacrylate, and the other components, preparation steps and parameters are consistent.

[0086] Comparative Example 2.

[0087] Comparative Example 2 is different from Example 3 in that the mass ratio of talc, anhydrous ethanol and silane coupling agent is 23:80:3, and the other components, preparation steps and parameters are consistent.

[0088] Comparative Example 3.

[0089] Comparative Example 3 is different from Example 3 in that vinyltrimethoxysilane is not used, and the other components, preparation steps and parameters are consistent.

[0090] Comparative Example 4.

[0091] Comparative Example 4 is different from Example 3 in that methacrylaldehyde is not used, and the other components, preparation steps and parameters are consistent.

[0092] Comparative Example 5.

[0093] Comparative Example 5 is different from Example 3 in that step S323 is not performed, and p-aminophenylthiophenol is used instead of the modified monomer, and the other components, preparation steps and parameters are consistent.

[0094] Comparative Example 6.

[0095] Comparative Example 6 is different from Example 3 in that steps S323 and S324 are not performed, and the pre-prepared filler and cinnamyl alcohol are mixed at a mass ratio of 2.5:22, and the other components, preparation steps and parameters are consistent.

[0096] The inks prepared in Examples 1-3 and Comparative Examples 1-6 are respectively tested as follows, and the test results are shown in Table 1.

[0097] Hardness test: according to GB / T 6739;

[0098] Light aging resistance test: in a xenon lamp aging tester, the dark room standard temperature is set to 100 DEG C, the laboratory temperature is maintained at 65 DEG C, the relative humidity of air is 20%, the radiation intensity is set to 60 W / m 2 , and the test duration is 130 hours.

[0099] Table 1

[0100] hardness lightfastness test example 1 4H no discoloration, no cracking, no blistering example 2 4H no discoloration, no cracking, no blistering example 3 4H no discoloration, no cracking, no blistering comparative example 1 3H slight discoloration, few cracks, few blisters comparative example 2 3H slight discoloration, few cracks, few blisters comparative example 3 2H severe discoloration, many cracks, many blisters comparative example 4 3H partial discoloration, more cracks, more blisters comparative example 5 3H slight discoloration, few cracks, few blisters comparative example 6 2H severe discoloration, many cracks, many blisters

[0101] From the test results in Table 1, it can be seen that, compared with Comparative Examples 1-6, the wear-resistant silicone ink prepared in step S300 of the present application has excellent hardness and aging resistance.

[0102] In step S300 of the present application, the surface of the talc powder is modified by a silane coupling agent to introduce active carbon-carbon double bonds to form covalent bonds with methacrolein, and the methacrolein has good compatibility with the acrylic resin to increase the dispersibility and interfacial bonding strength of the talc powder in the ink system; the cinnamic alcohol is modified by p-aminophenylthiol and then grafted with the pre-prepared filler to introduce a high-stable Schiff base structure and benzene ring structure to effectively increase the compactness and stability of the crosslinked network structure of the ink system, improve the wear resistance of the ink, and the hydroxyl groups contained in the cinnamic alcohol can increase the bonding strength with the epoxy groups of the glycidyl methacrylate to further increase the bonding force of the talc powder in the system and further improve the wear resistance and mechanical properties of the ink; the talc powder contains magnesium silicate and has excellent thermal stability and blocking properties for infrared and ultraviolet light, and the modification of the talc powder to increase its dispersibility can effectively improve the aging resistance of the ink.

[0103] The above description is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with reference to the preferred embodiment, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any indirect modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A process for printing a back logo on a mobile phone case with a wear-resistant touch effect, characterized in that, The method comprises the following steps: S100: providing a mobile phone shell PC plate substrate; S200: printing an adhesive layer on the outer surface of the mobile phone shell PC plate substrate; S300: printing a silica gel mark layer on the adhesive layer by heat transfer printing, wherein the raw material of the silica gel mark layer is wear-resistant silicone ink, and the wear-resistant silicone ink comprises the following components in parts by weight: 50-70 parts of modified acrylic resin, 10-15 parts of pigment, 2-3 parts of defoaming agent, 1.8-3.0 parts of dispersing agent, 1.8-3.0 parts of leveling agent, 20-30 parts of deionized water and 15-22 parts of ethanol; S400: printing a transparent film layer above the silica gel mark layer.

2. A process for printing a back logo on a mobile phone case with a wear-resistant hand feeling effect according to claim 1, characterized in that: In step S300, the modified acrylic resin is prepared by the following steps: S310: mixing and dispersing glycidyl methacrylate, sucrose fatty acid ester and isobutyl alcohol to obtain a mixed solution; S320: mixing and dispersing acrylic monomer, functional filler, sodium dodecyl sulfate, initiator and deionized water, preheating, slowly adding the mixed solution for constant temperature stirring, cooling, adjusting the pH value to obtain the modified acrylic resin.

3. A process for printing a back logo on a mobile phone case with a wear-resistant hand feeling effect according to claim 2, characterized in that: In step S310, the mass ratio of glycidyl methacrylate, sucrose fatty acid ester and isobutyl alcohol is 6-8:1.5-1.8:3-4; In step S320, the mass ratio of acrylic monomer, functional filler, sodium dodecyl sulfate, initiator, deionized water and mixed solution is 50-55:8-10:1.5-2.1:0.5-0.6:25-30:10-13.

4. A process for printing of back logo on mobile phone cover with wear resistant touch effect as claimed in claim 3 wherein: In step S320, the preheating is to heat to 60-65 DEG C; the constant temperature stirring is to stir at 65-70 DEG C for 1.5-2.0 h; the cooling is to cool to 40-45 DEG C; the pH value adjustment is to adjust the pH value to 7.5; the acrylic monomer consists of methyl methacrylate, ethyl methacrylate and hydroxyethyl acrylate in a mass ratio of 6.5-7.2:11-13:0.8-1.

2.

5. A process for printing of back logo on mobile phone cover with wear resistant touch effect as claimed in claim 2 wherein, The functional filler is prepared by the following steps: S321: adding talcum powder into anhydrous ethanol, uniformly mixing, adding silane coupling agent, heating and stirring, removing the solvent by rotary evaporation, washing, vacuum drying in an oven to obtain silane modified talcum powder; S322: uniformly mixing the silane modified talcum powder, methyl methacrylate and anhydrous ethanol, adding initiator, heating and polymerizing, centrifuging to obtain solid, washing, vacuum drying in an oven to obtain pre-prepared filler; S323: ultrasonic mixing cinnamyl alcohol, p-aminophenylthiol and anhydrous ethanol, adding photoinitiator, ultraviolet irradiation treatment, washing the product with water, drying to obtain modified monomer; S324: uniformly mixing the modified monomer into isobutyl alcohol, adding pre-prepared filler for constant temperature stirring, suction filtration, washing, vacuum drying in an oven to obtain functional filler.

6. A process for printing a back logo on a mobile phone case with a wear-resistant hand feeling effect according to claim 5, characterized in that: In S321, the mass ratio of the talc powder, anhydrous ethanol and silane coupling agent is 20-23:70-80:5.2-6.5; the silane coupling agent is vinyl trimethoxysilane; the temperature stirring is stirring at 55-65℃ for 6-8h; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 70℃ until constant weight.

7. The mobile phone case back logo printing process with wear-resistant feel according to claim 5, characterized in that: In S322, the mass ratio of the silane modified talc powder, methyl acrolein, anhydrous ethanol and initiator is 18-20:2.1-2.5:50-60:0.14-0.16; the heating polymerization is stirring at 70-75℃ for 10-12h; the cleaning is cleaning with anhydrous ethanol for 4 times; and the vacuum drying is vacuum drying at 60℃ until constant weight.

8. A process for printing a back logo on a mobile phone case with a wear-resistant touch effect according to claim 5, characterized in that: In S323, the mass ratio of the cinnamyl alcohol, p-aminophenylthiol, anhydrous ethanol and photoinitiator is 3.2-3.6:2.1-2.4:15-20:0.15-0.16; the ultrasonic mixing is ultrasonic mixing at 400-600W power for 10-15min; and the ultraviolet irradiation treatment is reacting under 365nm ultraviolet light irradiation for 6-8h.

9. The mobile phone case back marking printing process with wear-resistant feel according to claim 5, characterized in that: In S324, the mass ratio of the modified monomer, isobutyl alcohol and pre-prepared filler is 2.1-2.5:70-80:20-22; the constant temperature stirring is stirring at 42-50℃ for 5-6h; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 80℃ until constant weight.