Optical film base film

Abstract

The utility model discloses a base film for optical film relates to optical film technical field. Among them, the base film for optical film, include: matrix layer, a plurality of notches, array setting in two end surfaces of matrix layer, wherein, the two end surfaces of matrix layer are set into the notch of rugged uneven, prevent synovial membrane and avoid needing section passivation treatment. The utility model discloses, solve the existing coiled material existence synovial membrane phenomenon to, and, the coiled material edge after flat knife slitting is quite sharp, when staff along the coiled material edge action is extremely easy to cause cutting injury, thereby to the personnel safety cause the problem of greater hidden danger.

Description

Technical Field

[0001] This utility model relates to the field of optical film technology, and in particular to a base film for optical films. Background Technology

[0002] The base film used in the production of optical films is mainly made of PET. Optical film manufacturers purchase PET rolls according to the required width and then use roll-to-roll coating, sputtering, or vapor deposition methods to produce optical film products. Optical-grade PET raw material rolls are one of the indispensable raw materials for the production of optical film products.

[0003] PET rolls are generally produced by PET manufacturers first producing large-width master rolls, and then slit according to the width required by the customer to obtain rolls with smaller widths that can be shipped. Existing PET substrate rolls all have flat cut edges, which are obtained by linear cutting with a flat blade.

[0004] Of course, optical film manufacturers have multifaceted quality requirements for PET rolls. Besides width, length, thickness, and optical properties, they also expect incoming materials to be free of surface defects such as slippage, wrinkles, and loose edges. Therefore, such as Figure 1 As shown, PET manufacturers will provide PET rolls with partial embossing of 30mm on both the left and right edges to prevent slippage due to friction; apart from this, other appearance requirements of PET rolls are only controlled by slitting and winding tension control.

[0005] Existing PET rolls, regardless of whether they have additional edge embossing to prevent slippage, all have neatly shaped roll edges after being cut with a flat-blade. For users, PET rolls, as the substrate for optical film production, inevitably require numerous film stretching, sampling, and rewinding operations during subsequent coating processes, all of which require manual labor on-site. However, the edges of the rolls after flat-blade cutting are quite sharp, posing a significant safety hazard to workers who move along these edges. Furthermore, while existing methods can employ an additional edge heat passivation process to reduce the sharpness of the cut edges, this process is time-consuming and energy-intensive, significantly increasing the cost of base film production. Currently, no effective solution has been proposed to address these problems. Utility Model Content

[0006] Purpose of the utility model: To provide a base film for optical films, so as to at least solve one of the problems existing in the prior art.

[0007] Technical solution: A base film for optical films, comprising: Matrix layer; and Several notches are arrayed on both ends of the matrix layer; The two ends of the matrix layer are designed with irregular notches to prevent slippage and avoid the need for cross-sectional passivation.

[0008] Preferably, the notch is serrated to form serrated edges on both ends of the matrix layer.

[0009] Preferably, when the notch is serrated, the serrations at both ends of the matrix layer are staggered.

[0010] Preferably, the notch is arc-shaped to form arc-shaped edges on both ends of the matrix layer.

[0011] Preferably, when the notch is arc-shaped, the arc patterns at both ends of the matrix layer are staggered.

[0012] Preferably, the notch is serrated and arc-shaped, and the serrated and arc-shaped notches are alternately arranged.

[0013] Preferably, the depth of the notch is 0.1-5 mm.

[0014] Preferably, the depths of the various notches are not uniform.

[0015] Preferably, the notch is formed into a serrated or arc-shaped shape using a serrated or arc-shaped tool.

[0016] Preferably, the matrix layer is one of PET, PC, PMMA or PS.

[0017] Beneficial effects: In this embodiment, several notches are made on both ends of the matrix layer. By setting the two ends of the matrix layer into an uneven notch shape, slippage is prevented and the need for cross-sectional passivation treatment is avoided. This achieves the purpose of avoiding personnel injury and providing anti-slip film function, thereby realizing the technical effects of protecting personnel safety and saving on the pressing and heat passivation processes. It also solves the problems of existing PET production companies needing to provide PET rolls with partial pressing on the left and right edges to prevent slippage due to friction, and the fact that the edges of the rolls after flat cutting are quite sharp, which can easily cause cutting injuries when workers move along the edges of the rolls, thus posing a significant safety hazard. Furthermore, existing methods can perform additional edge heat passivation treatment to reduce the sharpness of the cut edges, but this process is time-consuming and energy-intensive, significantly increasing the production cost of the base film. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of existing optical film base films; and Figure 2 This is a schematic diagram of the three-dimensional structure of the base film for optical films of this utility model.

[0019] The attached figures are labeled as follows: 10. Matrix layer; 20. Gap; 30. Pressed flowers. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions 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 embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figure 2 As shown, this application relates to a base film for optical films. The base film for optical films includes: a matrix layer 10; the matrix layer 10 refers to the carrier or main body of the optical functional layer; it has high light transmittance, low haze, excellent mechanical properties and dimensional stability.

[0025] A plurality of notches 20 are arrayed on both ends of the matrix layer 10; this achieves the effect of creating a plurality of notches 20 on both ends of the matrix layer 10 according to preset requirements.

[0026] Specifically, the two ends of the matrix layer 10 are designed with uneven notches 20 to prevent slippage and avoid the need for cross-sectional passivation treatment. By disrupting the smooth surfaces of the two ends of the matrix layer 10 and designing them with notches 20, worker injuries can be prevented while providing good anti-slip membrane function.

[0027] It is important to know that slip film refers to the roll material that, after being wound up, takes on a conical shape due to the sliding of the film surface. Specifically, this manifests as unevenness on the sides of the roll material, with concave and convex surfaces that are not coplanar.

[0028] Thermal passivation of optical film cross-sections is a crucial process in the manufacturing of high-end optical devices. It primarily targets a series of treatments applied to the exposed sides (cross-sections) of optical thin films after cutting, aiming to repair cross-sectional defects, improve environmental stability, and ultimately enhance device performance.

[0029] This application uses a serrated blade to cut PET rolls. The finished PET rolls do not exhibit slippage and their edges do not pose a risk of cutting workers' arms.

[0030] As can be seen from the above description, this application achieves the following technical effects: In this embodiment, several notches 20 are made on both ends of the matrix layer 10. By setting the two ends of the matrix layer 10 to be uneven with notches 20, slippage is prevented and the need for cross-sectional passivation treatment is avoided. This achieves the purpose of avoiding personnel injury and providing anti-slip film function, thereby realizing the technical effect of protecting personnel safety and saving the pressing process 30. It also solves the problems of existing PET production companies that need to provide PET rolls with partial pressing 30 on the left and right edges to avoid slippage due to friction, and the fact that the edges of the rolls after flat cutting are quite sharp, which can easily cause cutting injuries when workers move along the edges of the rolls, thus posing a great safety hazard. In addition, existing methods can perform an additional edge heat passivation process to reduce the sharpness of the cut edges, but this process is time-consuming and energy-intensive, which greatly increases the production cost of the base film.

[0031] Furthermore, the notch 20 is serrated to form serrated edges on both ends of the matrix layer 10. It is understood that by setting the notch 20 to be serrated, compared to the flat cut of a flat blade, when an employee's fingers, arms, or body come into contact with the rolled edge, there will be no situation where their fingers, arms, or body are cut and scratched along the cut surface.

[0032] Because the cut surface created by a flat blade is too smooth, it can cause injury to workers by creating a cutting-like effect; while the serrated edge has a discontinuous contact surface, so an arm passing over it will only leave a scratch but not a cutting injury.

[0033] Meanwhile, when the serrated edge film is wound up, the tension is uneven on the end face of the film. The tension is high at the concave part of the serration and low at the protruding part of the serration. When the large roll is formed, the tension difference between the two ends makes the film less prone to slipping left and right, which has a similar anti-slip film effect to edge embossing 30. Moreover, this application only uses the shape of the material cutting tool to obtain the anti-slip film effect, which saves a process compared to the embossing 30 process.

[0034] Furthermore, when the notch 20 is serrated, the serrations at both ends of the matrix layer 10 are staggered. This can be understood as improving structural strength while also enhancing the anti-slip film effect.

[0035] Furthermore, the notch 20 is arc-shaped to form arc-shaped edges on both ends of the matrix layer 10. This allows for a variety of edge shapes to be selected, while also providing additional protection for personnel safety during operation.

[0036] Furthermore, when the notch 20 is arc-shaped, the arc patterns at both ends of the matrix layer 10 are staggered. This can be understood as improving structural strength while also enhancing the anti-slip film effect.

[0037] Furthermore, the notch 20 is serrated and arc-shaped, and the serrated and arc-shaped features are alternately arranged. It is understood that this allows for a variety of edge shapes to be selected.

[0038] Furthermore, the depth of the notch 20 is 0.1-5mm. Understandably, this achieves a good anti-slip film effect.

[0039] Furthermore, the depths of some of the notches 20 are inconsistent. Understandably, this allows for a further enhancement of the anti-slip film's effect.

[0040] Furthermore, the matrix layer 10 is one of PET, PC, PMMA, or PS. It is understood that this allows for a variety of materials to be selected, thus enabling flexible use. Preferably, the matrix layer 10 is PET (polyethylene terephthalate). It has excellent transparency, mechanical strength, chemical stability, and dimensional stability, and is relatively inexpensive.

[0041] Furthermore, the notch 20 is formed into a serrated or arc-shaped shape using a serrated or arc-shaped tool. It is understood that this achieves good forming results.

[0042] Specifically, such as Figure 2 As shown, when slitting rolls, a serrated cutter is used instead of a flat cutter, so that the two ends of the roll show serrated patterns after cutting.

[0043] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A base film for optical films, characterized in that, include: Matrix layer (10); and Several notches (20) are arrayed on both ends of the matrix layer (10); The two ends of the matrix layer (10) are set into an uneven notch shape to prevent slippage and avoid the need for cross-sectional passivation treatment.

2. The base film for optical films according to claim 1, characterized in that, The notch (20) is serrated to form serrated edges on both ends of the matrix layer (10).

3. The base film for optical films according to claim 2, characterized in that, When the notch (20) is serrated, the serrations at both ends of the matrix layer (10) are staggered.

4. The base film for optical films according to claim 1, characterized in that, The notch (20) is arc-shaped to form arc-shaped edges on both ends of the matrix layer (10).

5. The base film for optical films according to claim 4, characterized in that, When the notch (20) is arc-shaped, the arc patterns at both ends of the matrix layer (10) are staggered.

6. The base film for optical films according to claim 1, characterized in that, The notch (20) is serrated and arc-shaped, and the serrated and arc-shaped are alternately arranged.

7. The base film for optical films according to claim 1, characterized in that, The depth of the notch (20) is 0.1-5 mm.

8. The base film for optical films according to claim 1, characterized in that, The depths of some of the aforementioned gaps (20) are inconsistent.

9. The base film for optical films according to claim 1, characterized in that, The notch (20) is prepared by using a serrated tool or an arc-shaped tool to form a serrated or arc-shaped shape.

10. The base film for optical films according to claim 1, characterized in that, The matrix layer (10) is one of PET, PC, PMMA or PS.

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