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Protective film as well as preparation method and application thereof
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A protective film and pre-melting technology, which is applied in the field of cameras, can solve the problems of easy damage to the photosensitive area of the image sensor and difficulty in ensuring the yield of camera modules.
Pending Publication Date: 2021-07-16
O FILM IMAGE TECH (GUANGZHOU) CO LTD
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However, this method is easy to damage the photosensitive area of the image sensor, and it is difficult to guarantee the yield of the camera module
Method used
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preparation example Construction
[0053] The preparation method of the protective film in the above embodiment includes the following steps S110-S120:
[0054] S110, mixing white oil and SEBS under heating to obtain a pre-melt;
[0056] Among them, the raw materials include 10-12 parts of SEBS, 90-120 parts of white oil, 10-20 parts of covalent organic framework material, 0.1-0.3 parts of antioxidant and 0.5 parts of ~1 part of flame retardant. Further, the raw materials are the same as the raw materials for preparing the protective film of the above embodiment, see above for details, and will not be repeated here.
[0057] In one of the embodiments, the steps of S110 include S111-S112:
[0058] S111. Stir the white oil at 120°C to 130°C for 30min to 40min, add SEBS, and stir at 130°C to 150°C for 30min to 60min to obtain a pre-melt.
[0059] This setup results in an even mix of ...
Embodiment 1～5
[0075] According to the parameters in Tables 1-2, the protective films of Examples 1-5 were prepared. Wherein, the mass parts of the raw materials for preparing the protective film in Examples 1 to 5 are as shown in Table 1. Among the raw materials in Examples 1 to 5, the lubricant is polyethylenewax, and the defoamer is a siliconedefoamer. The oxygen agent is 2-amino-5-o-hydroxyphenyl-1,3,4-thiadiazide, the flame retardant is tris(2-ethylhexyl)phosphate, and the viscosity of white oil is 10mm 2 / s, the covalent organic framework material is 5,10,15,20-tetra(4-aminobenzene) porphyrin-dimethyl terephthalaldehyde covalent organic framework material; the preparation of the protective film of Examples 1-5 The technological parameter of process is as shown in table 2;
[0076] Specifically, the preparation process of the protective film is as follows:
[0077] (1) Heat the white oil to T1°C, stir at constant temperature for t1min, add SEBS, and stir at T2°C for t2min to obtain ...
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Abstract
The invention relates to a protective film as well as a preparation method and application thereof. The protective film is prepared from the following raw materials in parts by mass: 10 to 12 parts of a high-molecular triblock copolymer, 90 to 120 parts of base oil, 10 to 20 parts of a covalent organic framework material, 0.1 to 0.3 part of an antioxidant and 0.5 to 1 part of a flame retardant. The protective film can prevent dust, and the yield of the camera module can be ensured by adopting the protective film to prepare the camera module.
Description
technical field [0001] The invention relates to the technical field of cameras, in particular to a protective film and its preparation method and application. Background technique [0002] Generally, a camera module includes a lens barrel, a lens, an image sensorchip, and a variable-focus voice coil motor. During the assembly and installation of the camera module, since the workshop processing environment of the camera module cannot be absolutely dust-free, foreign matter such as dust particles will fall on the image sensorchip during the camera assembly process, and will be in the imaging area of the camera. Defects such as black spots are formed, which in turn affects the image quality and camera module performance. At present, the common solution in the industry is to remove dust from the photosensitive area of the image before packaging the image sensor, and use dust removal equipment (sticky stick / ball, etc.) to remove foreign matter. However, this method is eas...
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