阅读说明：本技术 一种防窥膜制造方法 (Method for manufacturing peep-proof film ) 是由 罗培栋 王群 魏俊峰 于 2020-07-20 设计创作，主要内容包括：一种防窥膜制造方法,包括如下步骤：A.利用光栅装置对将紫外光源发出的光线部分遮挡,使透过光栅的紫外光线为相隔等距的条纹状光线；将基材层表面均匀涂布光固化黑胶层,将其送入光栅装置形成的条纹状光线中进行固化；B.固化完成后将上述光固化黑胶层浸入溶剂中清洗掉未固化的光固化黑胶,形成基材层表面黑胶光栅结构；C.在上述基材层表面黑胶光栅结构涂布光固化白胶,填充黑胶光栅结构空隙并在黑胶光栅结构表面形成一层白胶保护层；D.在白胶保护层表面复合一层保护层后通过照射紫外光源完成白胶固化。本发明利用光栅结构制备条纹状平行光源,固化黑胶制备防窥膜百叶窗结构具有速度快,精度高,实施成本低,产品防窥效果好的特点。(A method for manufacturing a peep-proof film comprises the following steps: A. the grating device is used for shielding part of light rays emitted by the ultraviolet light source, so that the ultraviolet light rays penetrating through the grating are strip-shaped light rays which are separated at equal intervals; uniformly coating a photocuring black glue layer on the surface of the base material layer, and sending the base material layer into the stripe-shaped light formed by the grating device for curing; B. after the curing is finished, immersing the photocuring black glue layer into a solvent to clean uncured photocuring black glue, and forming a black glue grating structure on the surface of the substrate layer; C. coating photo-curing white glue on the black glue grating structure on the surface of the substrate layer, filling gaps of the black glue grating structure and forming a white glue protective layer on the surface of the black glue grating structure; D. and compounding a protective layer on the surface of the white glue protective layer, and then irradiating an ultraviolet light source to complete white glue curing. The invention utilizes the grating structure to prepare the stripe-shaped parallel light source, and the solidified black glue is used to prepare the peep-proof film shutter structure, and has the characteristics of high speed, high precision, low implementation cost and good peep-proof effect of the product.)

1. A method for manufacturing a peep-proof film is characterized by comprising the following steps:

A. the grating device is used for shielding part of light rays emitted by the ultraviolet light source, so that the ultraviolet light rays penetrating through the grating are strip-shaped light rays which are separated at equal intervals;

uniformly coating a photocuring black glue layer on the surface of the base material layer, and sending the base material layer into the stripe-shaped light formed by the grating device for curing;

B. after the curing is finished, immersing the photocuring black glue layer into a solvent to clean uncured photocuring black glue, and forming a black glue grating structure on the surface of the substrate layer;

C. coating photo-curing white glue on the black glue grating structure on the surface of the substrate layer, filling gaps of the black glue grating structure and forming a white glue protective layer on the surface of the black glue grating structure;

D. and compounding a protective layer on the surface of the white glue protective layer, and then irradiating an ultraviolet light source to complete white glue curing.

2. The method of making a privacy film of claim 1, wherein: the single grating width of the grating device light is 30-50 microns.

3. The method of making a privacy film of claim 1, wherein: the single grating width of the grating device light is 30-50 microns.

Technical Field

The invention relates to a method for manufacturing a peep-proof film.

Background

The peep-proof film is an optical film with a shutter grating structure, and the grating structure is used for selectively shielding light of the display to protect privacy and prevent other people around from peeping display contents. At present, the peep-proof film in industry is produced and prepared by transferring a fine concave structure on a white glue layer by using a precise carving coating rod, coating black glue, scraping redundant black glue and compounding the black glue with a protective layer. The coating roller of the scheme is difficult to carve, the grating structure is easy to damage in the process of scraping excessive black glue, and the production cost is high.

As described in chinese patent CN103818074A, after the transparent resin protruding units are engraved, the gaps are filled with black materials, and this scheme is not only difficult to engrave the protruding units, but also difficult to fill the gaps with black materials, and the black materials will cover the transparent protruding units to affect the light transmittance and reduce the use effect.

Disclosure of Invention

In order to overcome the defects of the peep-proof film manufacturing method in the prior art, the invention provides the peep-proof film manufacturing method which improves the production efficiency and the product using effect.

The technical scheme for solving the technical problem is as follows: a method for manufacturing a peep-proof film comprises the following steps:

A. the grating device is used for shielding part of light rays emitted by the ultraviolet light source, so that the ultraviolet light rays penetrating through the grating are strip-shaped light rays which are separated at equal intervals;

uniformly coating a photocuring black glue layer on the surface of the base material layer, and sending the base material layer into the stripe-shaped light formed by the grating device for curing;

B. after the curing is finished, immersing the photocuring black glue layer into a solvent to clean uncured photocuring black glue, and forming a black glue grating structure on the surface of the substrate layer;

C. coating photo-curing white glue on the black glue grating structure on the surface of the substrate layer, filling gaps of the black glue grating structure and forming a white glue protective layer on the surface of the black glue grating structure;

D. and compounding a protective layer on the surface of the white glue protective layer, and then irradiating an ultraviolet light source to complete white glue curing.

Preferably, the grating device has a single grating width of 30-50 microns.

The invention has the beneficial effects that: the striped parallel light source is prepared by utilizing the grating structure, and the peep-proof film shutter structure prepared by curing the black glue has the characteristics of high speed, high precision, low implementation cost and good peep-proof effect of the product.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

A method for manufacturing a peep-proof film comprises the following steps:

A. the light emitted by the ultraviolet light source is partially shielded by the grating device, so that the ultraviolet light penetrating through the grating is strip-shaped light at equal intervals, and the width of a single grating of the grating device is preferably controlled to be 30-50 microns.

The surface of a substrate layer (generally PET) is uniformly coated with a photocuring black glue layer, and the substrate layer is sent into stripe-shaped light formed by a grating device for curing.

B. And after the curing is finished, immersing the photocuring black glue layer into a solvent to clean the uncured photocuring black glue to form the black glue grating structure on the surface of the substrate layer, wherein the solvent is generally an organic solvent, and can be any one of toluene, butanone, ethanol, ethyl acetate and cyclohexane.

C. And coating the photo-curing white glue on the black glue grating structure on the surface of the substrate layer, filling gaps of the black glue grating structure and forming a white glue protective layer on the surface of the black glue grating structure.

D. After a protective layer (generally PET) is compounded on the surface of the white glue protective layer, the white glue is cured by irradiating an ultraviolet light source.

The invention utilizes the grating structure to prepare the stripe-shaped parallel light source, and the solidified black glue is used to prepare the peep-proof film shutter structure which has the characteristics of high speed, high precision, low implementation cost and good peep-proof effect of the product.