Polarizing film production method, polarizing plate, and polarizing glasses

Abstract

The application discloses a polarized film manufacturing method, a polarized film and polarized glasses, and belongs to the technical field of vision medical care, and the polarized film manufacturing method comprises the following steps: conveying a polyvinyl alcohol film to a swelling and stretching device through conveying rollers to perform stretching; conveying the stretched polyvinyl alcohol film to a printing device to print a pattern with polarization characteristics on the polyvinyl alcohol film through the printing device; conveying the printed polyvinyl alcohol film to a drying device to perform dehumidification; and packaging the dehumidified polyvinyl alcohol film after compounding and rolling with a triacetate fiber film to obtain a finished polarized film. The polarized film is obtained by printing a pattern with polarization characteristics on a polyvinyl alcohol film, and the polarized glasses are obtained through the polarized film, the wearing comfort of the polarized glasses is higher than that of existing chromatic aberration glasses, the fusion interference of binocular patterns is smaller, and therefore, a user can realize low-cost training for stereoscopic vision through the polarized glasses.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vision healthcare, in particular to a polarized film manufacturing method, a polarized film and polarized glasses thereof. BACKGROUND

[0002] Binocular fusion is a visual phenomenon, which refers to that when observing an object with both eyes at the same time, two images of the object are formed on the retinas of the two eyes respectively, and then transmitted to the same region of the visual cortex in the brain through the optic nerves on both sides, and then the two images are fused to obtain a complete and single visual experience. Generally speaking, binocular fusion is more likely to occur only when the images in the two fields of view have similar or related patterns, brightness or colors, otherwise binocular rivalry will occur. The most widely used color difference glasses on the market apply binocular split vision technology, which prints similar but not identical vector patterns in red, green or other different colors on the substrate, and makes the left and right eyes obtain different patterns through wearing red-green glasses or other corresponding glasses of different colors, and then the patterns are fused into a complete pattern after being processed by the brain.

[0003] However, in the prior art, the color difference glasses on the market include two types. The first type is to add a filter on ordinary glasses, which can only be used with specific similar and related red-green vector patterns, and can easily cause users to have severe dizziness when worn normally. At the same time, the color difference binocular split vision greatly interferes with visual fusion, and using this technology for stereoscopic vision training causes strong discomfort to the user. The second type is to wear glasses with different polarization directions to cooperate with patterns with polarization characteristics, so that the left and right eyes obtain patterns with different polarization directions. However, this scheme will reduce the amount of light entering the glasses after wearing, and the field of view will be dark.

[0004] Therefore, there is an urgent need for a polarized glasses with polarization characteristics at a low cost. SUMMARY

[0005] The main purpose of the present application is to provide a polarized film manufacturing method, a polarized film manufacturing method, a polarized film and polarized glasses thereof, which solve the problem of discomfort during wearing of the existing polarized glasses.

[0006] To achieve the above-mentioned purpose, the present application provides a polarized film manufacturing method, which comprises the following steps:

[0007] The polyvinyl alcohol film is conveyed to the swelling and stretching device through the conveying roller for stretching;

[0008] The stretched polyvinyl alcohol film is conveyed to the printing device, and the printing device is used to print patterns with polarization characteristics on the polyvinyl alcohol film;

[0009] The printed polyvinyl alcohol film is transported to a drying device and dehumidified;

[0010] The dehumidified polyvinyl alcohol film is roll-compressed with a triacetate film, and then packaged to obtain a polarized film product.

[0011] In this embodiment, the step of transporting the polyvinyl alcohol film to the swelling and stretching device for stretching includes:

[0012] The polyvinyl alcohol film is transported to the swelling and stretching device for positioning;

[0013] The polyvinyl alcohol film is cold-pressed in the horizontal direction to control the thickness of the polyvinyl alcohol film.

[0014] In this embodiment, the step of transporting the stretched polyvinyl alcohol film to the printing device and printing a pattern with polarization characteristics on the polyvinyl alcohol film includes:

[0015] The stretched polyvinyl alcohol film is transported to the printing device for positioning;

[0016] Two polarization patterns arranged at an angle are printed on one side of the positioned polyvinyl alcohol film by ink.

[0017] In this embodiment, the step of transporting the printed polyvinyl alcohol film to the drying device and dehumidifying it further includes:

[0018] The printed polyvinyl alcohol film is transported to the drying device;

[0019] The polyvinyl alcohol film is preliminarily dehumidified by the heating rollers in the drying device and moves in a horizontal straight line;

[0020] The preliminarily dehumidified polyvinyl alcohol film is transported to the sizing rollers in the drying device, and the preliminarily dehumidified polyvinyl alcohol film is dehumidified and sized to obtain the dried and sized polyvinyl alcohol film.

[0021] In this embodiment, the step of roll-compressing the dehumidified polyvinyl alcohol film with a triacetate film and then packaging to obtain a polarized film product further includes:

[0022] The dehumidified polyvinyl alcohol film is transported to the composite roller in a horizontal straight line;

[0023] The triacetate film is transported to the composite roller;

[0024] The composite roller rolls the polyvinyl alcohol film and the triacetate fiber film, so that the triacetate fiber film is compounded with the polyvinyl alcohol film, and a triacetate fiber-polyvinyl alcohol film is obtained.

[0025] In the embodiment, the composite roller comprises two second conveying rollers, which are arranged at the upper and lower ends of the composite roller respectively, and are used to convey the triacetate fiber film to the upper and lower sides of the polyvinyl alcohol film.

[0026] In the embodiment, the thickness of the polyvinyl alcohol film before swelling and stretching is 0.06 mm, and the thickness of the polyvinyl alcohol film after stretching by the swelling and stretching device is 0.025 mm.

[0027] The application further comprises a polarizing sheet, which comprises a polarizing film obtained by the polarizing film manufacturing method according to any one of the technical solutions.

[0028] In some embodiments, the polarizing sheet further comprises a protective substrate and a support plate, and the protective substrate and the support plate are sequentially connected to the polarizing film by UV adhesive.

[0029] The application further comprises a polarizing eyeglass, which comprises the polarizing sheet according to the technical solutions.

[0030] The application obtains a polarizing sheet by printing a pattern with polarization characteristics on a polyvinyl alcohol film, and then obtains a polarizing eyeglass by using the polarizing sheet. The polarizing eyeglass has higher wearing comfort than existing chromatic aberration eyeglasses, and has less fusion interference of binocular patterns, so that the user can realize low-cost training for stereoscopic vision by using the polarizing eyeglass. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A flowchart of a first embodiment of the polarizing film manufacturing method of the application;

[0032] Figure 2 A flowchart of a second embodiment of the polarizing film manufacturing method of the application;

[0033] Figure 3 A flowchart of a third embodiment of the polarizing film manufacturing method of the application;

[0034] Figure 4 A flowchart of a fourth embodiment of the polarizing film manufacturing method of the application;

[0035] Figure 5 A flowchart of a fifth embodiment of the polarizing film manufacturing method of the application;

[0036] Figure 6The figure is a structural schematic diagram of a production device for the polarized film manufacturing method.

[0037] Brief Description of the Drawings

[0038]

[0039]

[0040] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0041] The schemes in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0042] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indications also change accordingly.

[0043] It should also be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can have a middle element.

[0044] In addition, the descriptions involving "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0045] To achieve the above-mentioned purposes, the present application provides a polarized film manufacturing method, which comprises:

[0046] In step S100, the polyvinyl alcohol film is conveyed to the swelling and stretching device 200 by the conveying roller 100 for stretching.

[0047] Step S200, the stretched polyvinyl alcohol film is transported to the printing device 300, and the polyvinyl alcohol film is printed with a pattern having polarization characteristics by the printing device 300;

[0048] Step S300, the printed polyvinyl alcohol film is transported to the drying device 400 and dehumidified;

[0049] Step S400, the dehumidified polyvinyl alcohol film is pressed by the composite roller 500 after being combined with the triacetate film, and then packaged to obtain the finished polarization film.

[0050] In this embodiment, the production method is as shown in Figure 1 The production equipment is as shown in Figure 6 The polarization film production line is obtained by combining the conveying roller 100, the swelling stretching device 200, the printing device 300, the drying device 400, and the composite roller 500 and the winding roller 600 arranged on the linear conveyor 700. When the polarization film production line is started, the polyvinyl alcohol film is unwound from the conveying roller 100 to become a long belt and moves along the conveyor 700. The polyvinyl alcohol film is stretched by the swelling stretching device 200 to reduce the thickness of the polyvinyl alcohol film. At this time, the disordered and unordered polyvinyl alcohol molecules inside the original polyvinyl alcohol film become orderly arranged polyvinyl alcohol molecules after stretching. The water on the surface of the polyvinyl alcohol film is removed by the drying device 400, so that the polyvinyl alcohol surface is in a dry state, which is conducive to the subsequent printing process. After printing a pattern having polarization characteristics on the surface of the polyvinyl alcohol film, the triacetate film is coated, and finally the polarization film with the printed pattern having polarization characteristics is obtained.

[0051] The polyvinyl alcohol film and the triacetate film are compounded by roller pressing to form a triacetate film-polyvinyl alcohol film (TCA-PVA film). The TCA-PVA film is wound by the winding roller 600 arranged at the end of the conveyor 700, which reduces the space occupancy of the finished polarization film and facilitates the technician to unload the finished product.

[0052] In some embodiments, the step S100 of transporting the polyvinyl alcohol film to the swelling stretching device 200 for stretching further includes:

[0053] Step S110, the polyvinyl alcohol film is transported to the swelling stretching device 200 for positioning;

[0054] Step S120, the polyvinyl alcohol film is cold-pressed in the horizontal direction to control the thickness of the polyvinyl alcohol film.

[0055] In this embodiment, as shown in Figure 2As shown, the polyvinyl alcohol film is sent into the swelling stretching device 200 by the conveying belt 700, and after positioning, the polyvinyl alcohol film needs to be surface infiltrated by the humidifying assembly arranged inside the swelling stretching device 200. The infiltrated polyvinyl alcohol film is stretched by the cold pressing roller inside the swelling stretching device 200, so as to reach the actual required thickness. It can be understood that the polyvinyl alcohol will curl when stretched in a dry condition, and therefore needs to be infiltrated.

[0056] In some embodiments, the step S200 of conveying the stretched polyvinyl alcohol film to the printing device 300 includes the step of printing a pattern with polarization characteristics on the polyvinyl alcohol film by the printing device 300.

[0057] The step S210 of conveying the stretched polyvinyl alcohol film to the printing device 300 and positioning.

[0058] The step S220 of printing two polarization patterns arranged at an included angle on one side of the positioned polyvinyl alcohol film by ink.

[0059] In the present embodiment, as shown, Figure 3 the printing device 300 is a roll-to-roll printing. The ink polarization pattern containing iodine solution is printed on the polyvinyl alcohol film during printing. The polarization pattern is two identical patterns, and the two patterns are arranged perpendicular to each other at ninety degrees. Finally, two patterns with perpendicular polarization directions are obtained, which are used for visual fusion.

[0060] In another embodiment, the polarization pattern can be two completely identical patterns at any included angle other than parallel to each other.

[0061] In some embodiments, the step S300 of conveying the printed polyvinyl alcohol film to the drying device 400 and dehumidifying further includes:

[0062] The step S310 of conveying the printed polyvinyl alcohol film into the drying device 400.

[0063] The step S320 of dehumidifying the polyvinyl alcohol film by the heating roller inside the drying device 400 and moving along a horizontal straight line.

[0064] The step S330 of conveying the polyvinyl alcohol film after preliminary dehumidification to the sizing roller inside the drying device 400, and dehumidifying and sizing the polyvinyl alcohol film after preliminary dehumidification to obtain the dried and sized polyvinyl alcohol film.

[0065] It can be understood that, as Figure 4As shown, the surface of the polyvinyl alcohol film after swelling, stretching and printing has a large amount of water, which is not conducive to subsequent shaping and packaging, so it is necessary to dehumidify the printed polyvinyl alcohol film. In this embodiment, the inside of the drying device 400 has a heating roller and a shaping roller, which are arranged along the length direction of the conveying belt 700. The polyvinyl alcohol film after printing first abuts against the heating roller, so that the water on the surface of the polyvinyl alcohol film is dried, and then the shaping roller is used to stretch and shape the polyvinyl alcohol film, so as to avoid curling or deformation of the dried polyvinyl alcohol film.

[0066] In another embodiment, the drying device 400 can be provided with an electromagnetic heating device, a microwave heating device or an infrared heating device, and the heating temperature is 110-150°C.

[0067] In some embodiments, after the dehumidified polyvinyl alcohol film is pressed by the composite roller 500 with the triacetate film, the step of packaging the polar film product obtained in step S400 further comprises:

[0068] Step S410, the dehumidified polyvinyl alcohol film is transported along the horizontal straight line direction to the composite roller 500;

[0069] Step S420, the triacetate film is transported to the composite roller 500;

[0070] Step S430, the composite roller 500 rolls the polyvinyl alcohol film and the triacetate film to make the triacetate film and the polyvinyl alcohol film composite, and obtain the triacetate-polyvinyl alcohol film.

[0071] It can be understood that, as shown in Figure 5 The mechanical properties of the polyvinyl alcohol film are weak, and in order to ensure its normal use in daily life, the mechanical properties of the polyvinyl alcohol film need to be reinforced. In this embodiment, the mechanical properties of the polyvinyl alcohol film are reinforced by compounding the polyvinyl alcohol film with the triacetate film (TAC) film.

[0072] In some embodiments, the composite roller 500 comprises two second conveying rollers 510, which are arranged at the upper and lower ends of the composite roller 500 respectively, and are used to convey the triacetate film to the upper and lower sides of the polyvinyl alcohol film.

[0073] In this embodiment, as shown in Figure 6As shown, the second conveying rollers 510 are arranged at the upper and lower ends of the composite roller 500 respectively, and rotate in opposite directions to convey the triacetate film to the upper and lower ends of the polyvinyl alcohol film.

[0074] In some embodiments, the thickness of the polyvinyl alcohol film before swelling stretching is 0.06 mm, and the thickness of the polyvinyl alcohol film after stretching by the swelling stretching device 200 is 0.025 mm.

[0075] It can be understood that 0.06 mm is the common thickness of the existing industrial product polyvinyl alcohol film, and the thickness of the polarizing film is less than the requirement of the finished polyvinyl alcohol film, so it is necessary to stretch the polyvinyl alcohol film to a thickness of 0.025 mm by the swelling stretching device 200.

[0076] In another embodiment, the thickness of the polyvinyl alcohol film after the swelling stretching device 200 can be any thickness required.

[0077] The present application further provides another polarizing plate, which comprises the polarizing film obtained by the method for manufacturing the polarizing film according to any one of the above technical solutions.

[0078] In some embodiments, the polarizing plate further comprises a protective substrate and a support plate, and the protective substrate and the support plate are sequentially connected to the polarizing film by UV adhesive.

[0079] In this embodiment, the protective substrate, the polarizing film and the support plate are sequentially stacked, and the protective substrate and the polarizing film and the polarizing film and the support plate are connected by artificial or mechanical UV adhesive and then ultraviolet cured, so that the polarizing plate has good mechanical properties.

[0080] In this embodiment, the protective substrate and the support plate are both transparent acrylic plates.

[0081] More specifically, in another embodiment, the protective substrate and the support plate can be other transparent optical materials.

[0082] The present application further provides a polarizing glasses, which comprises the polarizing plate according to the above technical solution.

[0083] In the embodiment, the polarized glasses realize the beneficial effect of low-cost batch production capable of being used for visual training through the polarized sheet as described above, when the polarized sheet is arranged on the polarized glasses, the protective substrate in the polarized sheet is located on the side far from the user, for protecting the polarized film located in the middle layer, and the supporting plate is located on the side close to the user, for supporting the polarized film. It can be understood that the pattern with the polarized characteristics is relatively complex in the existing manufacturing process, and the production cost is also relatively high, the polarized glasses in the embodiment use the polarized film printed by the roll-to-roll mode to obtain the polarized sheet, and the cost is relatively low.

[0084] In conclusion, the polarized glasses are obtained through printing the pattern with the polarized characteristics on the polyvinyl alcohol film to obtain the polarized sheet, and then the polarized glasses are obtained through the polarized sheet, the wearing comfort of the polarized glasses is greater than that of the existing chromatic aberration glasses, the fusion interference of the binocular pattern is small, and the user can realize the low-cost training for stereoscopic vision through the polarized glasses.

[0085] In the case of not contradicting each other, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples.

[0086] The above only describes some or preferred embodiments of the present application, and neither the text nor the drawings can limit the scope of protection of the present application, any equivalent structural transformation using the content of the specification and drawings, or direct / indirect application in other related technical fields under the concept of the whole of the present application is included in the scope of protection of the present application.

Claims

1. A method for producing a polarizing film, characterized by comprising: The polarized film manufacturing method comprises the following steps: The polyvinyl alcohol film is conveyed to the swelling stretching device through the conveying roller for stretching; The stretched polyvinyl alcohol film is conveyed to the printing device, and the printing device is used to print the pattern with polarization characteristics on the polyvinyl alcohol film; The printed polyvinyl alcohol film is conveyed to the drying device for dehumidification; After the dehumidified polyvinyl alcohol film is roll-bonded with the triacetate fiber film, the polarized film finished product is obtained; The step of conveying the stretched polyvinyl alcohol film to the printing device and printing the pattern with polarization characteristics on the polyvinyl alcohol film by the printing device comprises: The stretched polyvinyl alcohol film is fed into the printing device and positioned; Two polarization patterns arranged at an angle are printed on one side of the positioned polyvinyl alcohol film by ink.

2. The method of producing a polarizing film according to claim 1, wherein The step of conveying the polyvinyl alcohol film to the swelling stretching device through the conveying roller for stretching comprises: The polyvinyl alcohol film is positioned in the swelling stretching device; The polyvinyl alcohol film is cold-pressed in the horizontal direction to control the thickness of the polyvinyl alcohol film.

3. The method of producing a polarizing film according to claim 2, wherein The step of conveying the printed polyvinyl alcohol film to the drying device for dehumidification further comprises: The printed polyvinyl alcohol film is conveyed to the drying device; The polyvinyl alcohol film is preliminarily dehumidified by the heating roller in the drying device and moves in the horizontal straight line direction; The preliminarily dehumidified polyvinyl alcohol film is conveyed to the sizing roller in the drying device, and the preliminarily dehumidified polyvinyl alcohol film is secondarily dehumidified and sized to obtain the dried and sized polyvinyl alcohol film.

4. The method of producing a polarizing film according to claim 3, wherein The step of roll-bonding the dehumidified polyvinyl alcohol film with the triacetate fiber film and packaging to obtain the polarized film finished product further comprises: The dehumidified polyvinyl alcohol film is conveyed to the composite roller in the horizontal straight line direction; The triacetate fiber film is conveyed to the composite roller; The composite roller roll-bonds the polyvinyl alcohol film with the triacetate fiber film, so that the triacetate fiber film is combined with the polyvinyl alcohol film to obtain the triacetate fiber-polyvinyl alcohol film.

5. The method of producing a polarizing film according to claim 4, wherein The composite roller comprises two second conveying rollers, which are respectively arranged at the upper and lower ends of the composite roller, and are used to convey the triacetate fiber film to the upper and lower sides of the polyvinyl alcohol film.

6. The polarizing film production method according to claim 1, wherein The thickness of the polyvinyl alcohol film before stretching is 0.06 mm, and the thickness after stretching by the swelling stretching device is 0.025 mm.

7. A polarizing plate characterized by comprising: The polarized film comprises the polarized film obtained by the polarized film manufacturing method according to any one of claims 1 to 6.

8. A polarizing plate according to claim 7, characterized by The polarized film further comprises a protective substrate and a support plate, and the protective substrate is sequentially connected with the polarized film and the support plate by UV adhesive.

9. Polarized eyewear, characterized in that, The polarized glasses comprise the polarized film according to claim 8.

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