Composite adhesive film production process and application thereof in fingerprint chip packaging field
A production process and technology for fingerprint chips, applied in film/sheet release liners, adhesives, film/sheet adhesives, etc., can solve the problems of wrinkled chip sidewalls, easy pollution of the surrounding environment, whitening, etc. , to achieve the effect of improving hardness and wear resistance, improving batch stability, and facilitating molding
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specific Embodiment approach 1
[0028] For the first specific implementation, please refer to Figure 1-2 , the present invention provides a technical solution: a composite film production process, including making a high-hardness wear-resistant layer, making a semi-cured adhesive layer and a composite upper and lower layer: using a precision coating machine, first coat the upper release film. High-hardness wear-resistant layer with cloth thickness of 10-25μm; coat semi-cured adhesive layer of 15-40μm thickness on the lower release film; use hot composite rollers to continuously apply the upper release film, high-hardness wear-resistant layer, semi-cured The adhesive layer and the lower release film are combined to form a roll-shaped integrated film;
[0029] The upper release film in step 1 is a mirror-surface release film, and after the adhesive film is cured, the appearance effect of a mirror surface is obtained; the lower release film in step 1 is a matte frosted release film, and the matte frosted relea...
Embodiment 1
[0035] First: select ELD type PET film with a thickness of 50 μm, ELD type PET film transmittance > 90%, haze value < 5%, apply non-silicon release agent on the film and obtain the upper release film; use Slot extrusion coating machine, coat a high-hardness wear-resistant layer with a thickness of 10-25 μm on the non-silicon release agent surface of the upper release film, use the coating machine oven to dry the solvent, and roll the material.
[0036] Secondly: apply a semi-cured adhesive layer with a thickness of 15-40μm on the release surface of the lower release film, preferably a coating thickness of 30±1μm; for the convenience of distinction, the choice of the lower release film is generally different from the color of the upper release film .
[0037] Then: use a heated composite roller to roll the high-hardness wear-resistant layer and the semi-cured adhesive layer together, and then roll the material.
[0038] Then: Die the roll film into a suitable size from the rol...
Embodiment 2
[0043] First: choose YGD type PET film with a thickness of 50 μm, the film haze value of YGD type is less than 65%, matt and matt, and apply non-silicon release agent on the film to obtain an upper release film. Then coat the release film with a slit extrusion coater, coat a high hardness wear-resistant layer with a thickness of 10-25 μm on the non-silicon release agent surface of the upper release film, and bake it with a coater oven. Dry solvent, rewinding in roll form, preferably coating thickness 25±1μm.
[0044] Secondly: apply a semi-cured adhesive layer with a thickness of 15-40μm on the release surface of the lower release film, preferably a coating thickness of 30±1μm; for the convenience of distinction, the choice of the lower release film is generally different from the color of the upper release film .
[0045] Then: use the heated composite roller to roll the high hardness wear-resistant layer and the semi-cured adhesive layer together, and then roll the material...
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