阅读说明：本技术 一种摄像头镜片镀膜丝印方法 (Camera lens film-coating silk-screen printing method ) 是由 吴本安 毛中犁 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种摄像头镜片镀膜丝印方法,包括如下步骤：步骤1：在镜片背面镀AR膜；步骤2：在镜片正面镀AF膜；步骤3：对镜片的背面进行等离子体轰击；步骤4；对镜片的背面进行丝印处理。本发明的有益效果为：该镀膜丝印方法制备的摄像头镜片具有较高的油墨附着力。(The invention discloses a camera lens film coating silk-screen printing method, which comprises the following steps: step 1: plating an AR film on the back surface of the lens; step 2: plating an AF film on the front surface of the lens; and step 3: carrying out plasma bombardment on the back surface of the lens; step 4; and carrying out silk-screen printing treatment on the back surface of the lens. The invention has the beneficial effects that: the camera lens prepared by the coating silk-screen method has high ink adhesion.)

1. A camera lens film coating silk-screen printing method is characterized by comprising the following steps: the method comprises the following steps:

step 1: plating an AR film on the back surface of the lens;

step 2: plating an AF film on the front surface of the lens;

and step 3: carrying out plasma bombardment on the back surface of the lens;

step 4; and carrying out silk-screen printing treatment on the back surface of the lens.

2. The camera lens film-coating silk-screen printing method according to claim 1, which is characterized in that: step1 and step2 are both carried out in a vacuum environment, and step3 is carried out in a normal pressure environment.

3. The camera lens film-coating silk-screen printing method according to claim 1, which is characterized in that: and 3, the working gas bombarded by the plasmas in the step3 is air, the air flow is 90-110Sccm, the ICP power is 3-5KW, and the time is 50-70 s.

4. The camera lens film-coating silk-screen printing method according to claim 1, which is characterized in that: the step1 comprises the following steps:

step 1: plating a SiO2 film layer on the back surface of the lens in a vacuum environment;

step 2: plating a lanthanum titanate film layer on the surface of the SiO2 film layer in a vacuum environment;

step 3: plating a SiO2 film layer on the surface of the lanthanum titanate film layer in a vacuum environment;

step 4: repeating the steps 2 and 3 twice under vacuum environment.

5. The camera lens film-coating silk-screen printing method according to claim 4, which is characterized in that: the film layer structure of the AR film plated in the step1 is sequentially SiO2/H4/SiO2/H4/SiO2/H4/SiO2 from the side close to the lens to the side far away from the lens, wherein SiO2 represents a SiO2 film layer, and H4 represents a lanthanum titanate film layer; the thickness of the film layer structure of the AR film plated in the step1 is 14.4/12.7/47/47/13.8/75.6/70 in nm from the side close to the lens to the side far from the lens.

6. The camera lens film-coating silk-screen printing method according to claim 4, which is characterized in that: vacuum levels of 3.0 × 10 at steps 1, 2, 3 and 4^-3Pa, temperature 300 ℃.

7. The camera lens film-coating silk-screen printing method according to claim 1, which is characterized in that: the step4 comprises the following steps:

s1: pouring the printing ink into the gauze;

s2: transferring the ink from the screen to the back of the lens with a squeegee;

s3: and drying the ink on the lens.

8. The camera lens film-coating silk-screen printing method according to claim 1, which is characterized in that: the ink comprises the following components in parts by weight:

40-50 parts of polyester acrylate

10-20 parts of epoxy acrylate

10-20 parts of ethoxy phenol acrylate

3-8 parts of benzophenone

3-6 parts of methyl glycol amine

1-2 parts of 2, 6-di-tert-butyl cresol

1-2 parts of rutile type titanium dioxide

1-2 parts of polydimethylsiloxane oil

1-3 parts of benzyl chloride.

9. The camera lens film-coating silk-screen printing method according to claim 8, which is characterized in that: the preparation method of the ink comprises the following steps:

uniformly mixing 40-50 parts of polyester acrylate, 10-20 parts of epoxy acrylate, 10-20 parts of ethoxy phenol acrylate and 1-2 parts of polydimethylsiloxane;

II, adding 1-2 parts of 2, 6-di-tert-butyl cresol, 1-2 parts of rutile titanium dioxide and 1-3 parts of benzyl chloride according to parts by weight, and uniformly mixing;

and III, finally adding 3-8 parts of benzophenone and 3-6 parts of methyl glycol amine according to parts by weight, and uniformly mixing.

10. The camera lens film-coating silk-screen printing method according to claim 1, which is characterized in that: the step2 comprises the following steps: all vacuum degrees are 3.0 x 10^-3Pa, and plating an AF film on the front surface of the lens in an environment with the temperature of 300 ℃.

Technical Field

The invention relates to a camera lens, in particular to a camera lens film-coating silk-screen printing method.

Background

With the development of smart phones, camera functions become more and more important reference bases for people to select mobile phones. The lens of the camera is an important part for realizing the camera function of the mobile phone.

In the production process of the camera lens, the lens needs to be subjected to film coating treatment and silk-screen printing treatment in sequence. The coating treatment is to coat an AR film and an AF film on the surface of the lens in sequence. The AR coating is used for reducing reflection of light and enabling the light to pass through to the maximum extent, so that the quality of the image pickup is guaranteed. The AF film is plated to prevent sweat from contaminating the surface of the lens and affecting light transmission through the lens.

However, after the film plating treatment, the dyne value of the lens surface is reduced, which affects the adhesion of the ink during the silk-screen printing treatment, and even the ink on the lens naturally falls off, and needs to be improved.

Disclosure of Invention

The invention aims to provide a camera lens film-coating silk-screen printing method. The camera lens prepared by the coating silk-screen method has high ink adhesion.

The technical purpose of the invention is realized by the following technical scheme:

a camera lens film coating silk-screen printing method comprises the following steps:

step 1: plating an AR film on the back surface of the lens;

step 2: plating an AF film on the front surface of the lens;

and step 3: carrying out plasma bombardment on the back surface of the lens;

step 4; and carrying out silk-screen printing treatment on the back surface of the lens.

The invention is further configured to: step1 and step2 are both carried out in a vacuum environment, and step3 is carried out in a normal pressure environment.

The invention is further configured to: and 3, the working gas bombarded by the plasmas in the step3 is air, the air flow is 90-110Sccm, the ICP power is 3-5KW, and the time is 50-70 s.

The invention is further configured to: the step1 comprises the following steps:

step 1: plating a SiO2 film layer on the back surface of the lens in a vacuum environment;

step 2: plating a lanthanum titanate film layer on the surface of the SiO2 film layer in a vacuum environment;

step 3: plating a SiO2 film layer on the surface of the lanthanum titanate film layer in a vacuum environment;

step 4: repeating the steps 2 and 3 twice under vacuum environment.

The invention is further configured to: the film layer structure of the AR film plated in the step1 is sequentially SiO2/H4/SiO2/H4/SiO2/H4/SiO2 from the side close to the lens to the side far away from the lens, wherein SiO2 represents a SiO2 film layer, and H4 represents a lanthanum titanate film layer; the thickness of the film layer structure of the AR film plated in the step1 is 14.4/12.7/47/47/13.8/75.6/70 in nm from the side close to the lens to the side far from the lens.

The invention is further configured to: vacuum levels of 3.0 × 10 at steps 1, 2, 3 and 4^-3Pa, temperature 300 ℃.

The invention is further configured to: the step4 comprises the following steps:

s1: pouring the printing ink into the gauze;

s2: transferring the ink from the screen to the back of the lens with a squeegee;

s3: and drying the ink on the lens.

The invention is further configured to: the ink comprises the following components in parts by weight:

40-50 parts of polyester acrylate

10-20 parts of epoxy acrylate

10-20 parts of ethoxy phenol acrylate

3-8 parts of benzophenone

3-6 parts of methyl glycol amine

1-2 parts of 2, 6-di-tert-butyl cresol

1-2 parts of rutile type titanium dioxide

1-2 parts of polydimethylsiloxane oil

1-3 parts of benzyl chloride.

The invention is further configured to: the preparation method of the ink comprises the following steps:

uniformly mixing 40-50 parts of polyester acrylate, 10-20 parts of epoxy acrylate, 10-20 parts of ethoxy phenol acrylate and 1-2 parts of polydimethylsiloxane;

II, adding 1-2 parts of 2, 6-di-tert-butyl cresol, 1-2 parts of rutile titanium dioxide and 1-3 parts of benzyl chloride according to parts by weight, and uniformly mixing;

and III, finally adding 3-8 parts of benzophenone and 3-6 parts of methyl glycol amine according to parts by weight, and uniformly mixing.

The invention is further configured to: the step2 comprises the following steps: all vacuum degrees are 3.0 x 10^-3Pa, and plating an AF film on the front surface of the lens in an environment with the temperature of 300 ℃.

In conclusion, the invention has the following beneficial effects:

1. the AF film is collectively called a high-transmittance anti-fingerprint film. When the AR film and the AF film are plated, the AR film is plated before the AF film. When the AF film is plated, molecules of the AF film are diffracted to the surface of the AR film which is already plated, so that the dyne value of the AR film is reduced. The functional group of the AF film molecule is-CH 2-CF3, and the AF film molecule on the surface of the AR film generates a vacant bond through ion bombardment, so that the back surface of the lens is activated, the dyne value is improved, and the adhesive force of the printing ink is improved. Therefore, before the screen printing treatment is carried out on the back surface of the lens, the AF film molecules attached to the AR film are damaged by carrying out plasma bombardment on the back surface of the lens, so that the adhesive force of the printing ink is improved;

2. when the AR film and the AF film are plated, the lens is in a vacuum environment. If plasma bombardment is performed on the back surface of the lens to destroy AF film molecules attached to the AR film, the plasma bombardment is also performed in a vacuum environment, resulting in an increased demand for a vacuum environment and an increased production cost. More importantly, plasma bombardment in a vacuum environment can destroy the properties of the AF film on the front surface of the lens, such as the hydrophobic and oleophobic properties of the AF film, due to diffraction of ions and molecules. Therefore, the back surface of the lens is subjected to plasma bombardment in a normal-pressure environment, so that the cost can be reduced, the influence on the performance of an AF (AF) film can be avoided, the dyne value of the back surface of the lens is finally improved, and the adhesive force of ink is improved;

3. the main component of the lens is SiO2, the side of the film layer structure of the AR film closest to the lens is also a SiO2 film layer, and meanwhile, the film layer structure of the AR film is internally provided with a plurality of SiO2 film layers, so that the expansion coefficients of the AR film and the lens are close, the bonding strength of the AR film and the lens is enhanced, and the stress between the AR film and the lens when the temperature becomes high is reduced;

4. the polyester acrylate and the epoxy acrylate are prepolymers and are main substances for forming films after the ink is cured. The properties of the prepolymer directly affect the properties of the ink, such as adhesion, hardness, flexibility, etc. after curing of the ink. The prepolymer has high molecular weight and high viscosity;

5. ethoxy phenol acrylate is a diluent monomer. The viscosity of the prepolymer is higher, and the viscosity of the ink can be reduced by adding the diluting monomer;

6. benzophenone is a hydrogen abstraction type photoinitiator, and if it is used alone, it cannot photopolymerize an olefin monomer. If benzophenone is used in combination with an alcohol ether, oxygen readily quenches the excited benzophenone upon extraction of hydrogen atoms from the alcohol and ether. The benzophenone and the methyl glycol amine are used together, hydrogen atoms are extracted from the methyl glycol amine, and the ketone forms an excited state complex compound with the amine immediately after forming the excited state, so that the energy transfer to oxygen molecules is avoided, and the quenching by oxygen is not easy;

7. the methyl glycol amine is colorless or dark yellow oily liquid, can be mixed and dissolved with water and alcohol, and is slightly soluble in ether;

8. 2, 6-di-tert-butyl cresol can make the ink more stable;

9. the rutile titanium dioxide has compact crystal structure, stability, small optical activity, good weather resistance and higher covering power;

10. the polydimethylsiloxane oil is used as a defoaming agent, so that the leveling property of the printing ink can be improved, and shrinkage cavities are prevented;

11. methyl glycol amine is tertiary amine, and can react with benzyl chloride to generate quaternary ammonium salt, so as to form positive charge with larger particle size. And the AF film on the back of the lens can generate vacant bonds after being bombarded by plasma, so that quaternary ammonium salt generated by methyl glycol amine and benzyl chloride can easily generate stronger intermolecular force with the AF film on the back of the lens, thereby enhancing the adhesive force of the ink.

Detailed Description

Examples 1 to 5 are for explaining the components of the ink. The compositions of the inks of examples 1 to 5 are shown in Table 1.

TABLE 1, EXAMPLES 1-5 ink composition tables

Note: the unit "parts" means parts by weight.

The following describes the preparation of the ink in detail with reference to table 1.

A preparation method of the ink comprises the following steps:

uniformly mixing polyester acrylate, epoxy acrylate, ethoxy phenol acrylate and polydimethylsiloxane oil according to parts by weight;

II, adding 2, 6-di-tert-butyl cresol, rutile titanium dioxide and benzyl chloride according to the parts by weight, and uniformly mixing;

and III, finally adding the benzophenone and the methyl glycol amine according to the parts by weight, and uniformly mixing.

Examples 6 to 10 are for explaining a camera coating screen printing method.

A camera lens film coating silk-screen printing method comprises the following steps:

step 1: plating an AR film on the back surface of the lens;

step 2: plating an AF film on the front surface of the lens;

and step 3: carrying out plasma bombardment on the back surface of the lens;

step 4; and carrying out silk-screen printing treatment on the back surface of the lens.

Wherein the step1 comprises the following steps:

the step1 comprises the following steps:

step 1: all vacuum degrees are 3.0 x 10^-3Pa, plating a SiO2 film layer on the back surface of the lens in a vacuum environment at the temperature of 300 ℃;

step 2: all vacuum degrees are 3.0 x 10^-3Pa, plating a lanthanum titanate film layer on the surface of the SiO2 film layer in a vacuum environment at the temperature of 300 ℃;

step 3: all vacuum degrees are 3.0 x 10^-3Pa, plating a SiO2 film layer on the surface of the lanthanum titanate film layer in a vacuum environment at the temperature of 300 ℃;

step 4: all vacuum degrees are 3.0 x 10^-3Pa, and repeating Step2 and Step3 twice at the temperature of 300 ℃ in a vacuum environment.

The film layer structure of the AR film plated in the step1 is sequentially SiO2/H4/SiO2/H4/SiO2/H4/SiO2 from the side close to the lens to the side far away from the lens. Wherein SiO2 represents SiO2 film layer, H4 represents lanthanum titanate film layer. The thickness of the film layer structure of the AR film plated in the step1 is 14.4/12.7/47/47/13.8/75.6/70 in nm from the side close to the lens to the side far from the lens.

The step2 comprises the following steps:

all vacuum degrees are 3.0 x 10^-3Pa, and plating an AF film on the front surface of the lens in an environment with the temperature of 300 ℃.

And step3 is carried out in a normal pressure environment, the working gas bombarded by the plasma is air, the air flow is 90-110Sccm, the ICP power is 3-5KW, and the time is 50-70 s.

The step4 comprises the following steps:

s1: pouring the printing ink into the gauze;

s2: transferring the ink from the screen to the back of the lens with a squeegee;

s3: and drying the ink on the lens.

TABLE 2, EXAMPLES 6-10 parameter tables

Adhesion test

The inks on the lenses obtained in examples 6 to 10 were tested with reference to GB/T13217.7-2009 test method for liquid ink adhesion fastness

Table 3, examples 6-10 lens ink adhesion test record table

	Example 6	Example 7	Example 8	Example 9	Example 10
						Fastness to adhesion	100％	100％	100％	100％	100％

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.