Transportation device for raw materials of visible light to near-infrared wide-wave ultra-low reflecting film

Abstract

The utility model discloses a visible light to near-infrared wide wave ultra-low reflection film raw material conveying device which comprises a supporting table, a stand column is fixedly connected to the surface of the supporting table, a rotating roller is rotationally connected to the inner wall of the stand column through a bearing, and the visible light to near-infrared wide wave ultra-low reflection film raw material conveying device further comprises a guiding device. The guide device is arranged outside the supporting table; the locking device is arranged on one side of the limiting device. The utility model relates to the technical field of reflective film processing, in particular to a visible light to near-infrared wide-wave ultra-low reflective film raw material conveying device, which can limit visible light to near-infrared wide-wave ultra-low reflective film raw materials during conveying through the matching of a double-thread screw rod, a vertical plate, a sleeve, a limiting ring, a sliding rail and a sliding block. The problems that when an existing conveying device conveys reflecting film raw materials, due to mutual friction between the reflecting film and a rotating roller, the position of the reflecting film is prone to deviation, and the using effect of the conveying device is reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of reflective film processing technology, specifically a raw material transportation device for a wide-wave ultra-low reflective film from visible light to near-infrared. Background Technology

[0002] A reflective film is an optical material primarily used in LCD backlight modules. Its function is to reflect light leaking through the light guide plate back, reducing light loss and increasing backlight brightness. Visible to near-infrared broadband ultra-low reflective film is one type of reflective film. During the coating process of visible to near-infrared broadband ultra-low reflective film, it needs to be transported using a transport device.

[0003] When using existing transport equipment, workers pass the visible light to near-infrared broadband ultra-low reflectivity film raw materials through multiple rotating rollers in sequence, thereby guiding the reflective film during the transport process;

[0004] However, when transporting reflective film raw materials, the existing transport device causes friction between the reflective film and the rotating roller, resulting in different frictional forces at each position of the reflective film. This causes the reflective film to easily shift, affecting the subsequent coating effect and thus reducing the effectiveness of the transport device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a visible to near-infrared wide-wave ultra-low reflectivity film raw material transport device. This device solves the problem that when transporting reflective film raw materials, the friction between the reflective film and the rotating rollers causes uneven friction at each position of the reflective film, resulting in the reflective film's position easily shifting and thus reducing the effectiveness of the transport device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a visible to near-infrared wideband ultra-low reflectivity film raw material transport device, comprising a support platform, a column fixedly connected to the surface of the support platform, and a rotating roller rotatably connected to the inner wall of the column via bearings. The visible to near-infrared wideband ultra-low reflectivity film raw material transport device further includes a guiding device disposed outside the support platform; a limiting device disposed above the rotating roller; and a locking device disposed on one side of the limiting device. The guiding device guides the transported visible to near-infrared wideband ultra-low reflectivity film raw material, the limiting device limits the transported visible to near-infrared wideband ultra-low reflectivity film raw material to prevent it from shifting, and the locking device locks the limiting device when not in use.

[0007] Preferably, the limiting device includes a housing fixed to the top of the column; a handwheel disposed on the side wall of the housing; both ends of a double-ended screw rotatably connected to the inner wall of the housing via bearings; a vertical plate threadedly connected to the outer wall of the double-ended screw and extending to the bottom of the housing; a sleeve rotatably connected to the inner wall of the vertical plate via bearings, and the inner wall fitting against the outer wall of the rotating roller; a limiting ring fixed to the side wall of the sleeve, and the inner wall fitting against the outer wall of the rotating roller; a slide rail fixed to the top of the inner wall of the housing; a slider slidably engaging with the outer wall of the slide rail and fixed to the top of the vertical plate; wherein, driven by the handwheel, the double-ended screw causes the vertical plate to move the slider on the slide rail, thereby causing the sleeve to move the limiting ring.

[0008] Preferably, the locking device includes a housing, which is fixed to the side wall of the housing; a connecting post is rotatably connected to the inner wall of the housing via a pin, and its end extends to the outside of the housing through an opening; two ends of a torsion spring are respectively fixed to the outer wall of the connecting post and the inner wall of the housing; a pawl is fixed to the lower side of the connecting post; a ratchet is engaged with the outside of the pawl and fixed to the outside of the double-ended screw; a connecting part is provided at the end of the double-ended screw; wherein, by the elastic force of the torsion spring, the connecting post drives the pawl to contact the ratchet, thereby locking the double-ended screw.

[0009] Preferably, the connecting part includes a horizontal column, which is fixed to the side wall of the handwheel; a key block is fixed to the end of the double-ended screw, and its outer wall is inserted into the inner wall of the horizontal column; wherein, the handwheel and the double-ended screw are connected together by the cooperation of the horizontal column and the key block.

[0010] Preferably, the guiding device includes a vertical plate, which is fixed to the surface of the support platform on the side near the column; a guide roller is rotatably connected to the inner wall of the vertical plate via a bearing; and a flattening part is disposed on the surface of the support platform on the side away from the vertical plate; wherein, the visible light to near-infrared broadband ultra-low reflectivity film raw material being transported is guided by the vertical plate and the guide roller.

[0011] Preferably, the flattening section includes a bracket fixed to the surface of the support platform on the side away from the upright plate; two pressure rollers, one of which is rotatably connected to the inner wall of the bracket via a bearing; a cover is fixed to the top of the bracket by bolts; a hydraulic cylinder is fixed to the upper inner wall of the cover by bolts, and its bottom extends into the interior of the bracket through an opening; a curved column is fixed to the bottom output end of the hydraulic cylinder by bolts, and is rotatably connected to the end of the other pressure roller via a bearing; an upright is fixed to the top of the curved column, passes through the bracket, and is movably connected to the bracket; wherein, through the cooperation of the hydraulic cylinder and the pressure rollers, the visible light to near-infrared broadband ultra-low reflectivity film material is flattened.

[0012] Beneficial effects

[0013] This invention provides a transport device for visible to near-infrared broadband ultra-low reflectivity film raw materials. It offers the following advantages: This transport device, through the cooperation of a housing, handwheel, double-ended screw, vertical plate, sleeve, limiting ring, slide rail, and slider, achieves precise positioning of the visible to near-infrared broadband ultra-low reflectivity film raw materials during transport. This solves the problem in existing transport devices where friction between the reflective film and the rotating rollers causes uneven friction at different positions of the reflective film, leading to positional deviations and reduced transport device effectiveness.

[0014] By cooperating with the outer shell, connecting column, torsion spring, pawl, ratchet, and connecting part, the double-ended screw is locked when not in use, preventing it from rotating. This solves the problem that when the transport device is in operation, the double-ended screw may rotate unexpectedly due to transport vibration, external force collision, or operator mis-touch, causing the limit ring to shift and the reflective film material to leave the limit area during transport. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Exploded view;

[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the middle box, rotating rollers and vertical plates;

[0018] Figure 4 for Figure 3 A schematic diagram of the structure of the ratchet, handwheel, and double-ended screw;

[0019] Figure 5 for Figure 4 A schematic diagram of the structure of the connecting column, the outer casing, and the ratchet;

[0020] Figure 6 for Figure 1 A schematic diagram of the structure of the middle cover, pressure rollers, and curved column.

[0021] In the diagram: 1. Support platform; 2. Guide device; 21. Vertical plate; 22. Guide roller; 23. Flattening part; 231. Bracket; 232. Pressure roller; 233. Cover; 234. Hydraulic cylinder; 235. Curved column; 236. Vertical pole; 3. Column; 4. Rotating roller; 5. Limiting device; 51. Box; 52. Handwheel; 53. Double-ended screw; 54. Vertical plate; 55. Sleeve; 56. Limiting ring; 57. Slide rail; 58. Slider; 6. Locking device; 61. Outer shell; 62. Connecting column; 63. Torsion spring; 64. Pawl; 65. Ratchet; 66. Connecting part; 661. Horizontal column; 662. Key block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] When transporting reflective film raw materials, existing transport devices cause uneven friction between the reflective film and the rotating rollers, resulting in the reflective film being misaligned and reducing the effectiveness of the transport device.

[0024] In view of this, the present invention provides a transport device for visible to near-infrared broadband ultra-low reflectivity film raw materials. Through the cooperation of a box, handwheel, double-headed screw, vertical plate, sleeve, limiting ring, slide rail and slider, the device achieves the limiting of visible to near-infrared broadband ultra-low reflectivity film raw materials during transport. This solves the problem that in existing transport devices, the friction between the reflective film and the rotating roller causes different frictional forces at each position of the reflective film, resulting in the reflective film's position easily shifting, thus reducing the effectiveness of the transport device.

[0025] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0026] Example 1: By Figure 1-6It is known that a visible to near-infrared wide-wave ultra-low reflectivity film raw material transport device includes a support platform 1, a column 3 fixedly connected to the surface of the support platform 1, and a rotating roller 4 rotatably connected to the inner wall of the column 3 through bearings. The visible to near-infrared wide-wave ultra-low reflectivity film raw material transport device also includes a guiding device 2, a limiting device 5, and a locking device 6. The guiding device 2 is located outside the support platform 1; the limiting device 5 is located above the rotating roller 4; and the locking device 6 is located on one side of the limiting device 5. The guiding device 2 guides the visible to near-infrared wide-wave ultra-low reflectivity film raw material during transport, the limiting device 5 limits the visible to near-infrared wide-wave ultra-low reflectivity film raw material during transport to prevent it from deviating, and the locking device 6 locks the limiting device 5 when it is not in use.

[0027] In the specific implementation process, it is worth noting that the bottom of the support platform 1 is fixed with support legs, which support the support platform 1. The column 3 supports the rotating roller 4. When transporting the visible light to near infrared broadband ultra-low reflection film material, the staff will pass the visible light to near infrared broadband ultra-low reflection film material through the guide device 2 and the limiting device 5 in sequence. After completion, the staff will limit the reflective film material on the rotating roller 4 through the limiting device 5. Finally, the visible light to near infrared broadband ultra-low reflection film material will be moved to the external coating equipment to start the transportation of the reflective film material.

[0028] Specifically, in transporting the visible to near-infrared wide-wave ultra-low reflection film raw material, the staff will pass the visible to near-infrared wide-wave ultra-low reflection film raw material through the guide device 2 and the limiting device 5 in sequence. After completion, the staff will limit the reflective film raw material on the rotating roller 4 through the limiting device 5. Finally, the visible to near-infrared wide-wave ultra-low reflection film raw material will be moved to the external coating equipment to start the transportation of the reflective film raw material.

[0029] Example 2: From Figure 1-6 It can be seen that the limiting device 5 includes a housing 51, a handwheel 52, a double-ended screw 53, a vertical plate 54, a sleeve 55, a limiting ring 56, a slide rail 57, and a slider 58. The housing 51 is fixed to the top of the column 3; the handwheel 52 is disposed on the side wall of the housing 51; both ends of the double-ended screw 53 are rotatably connected to the inner wall of the housing 51 through bearings; the vertical plate 54 is threaded to the outer wall of the double-ended screw 53 and extends to the bottom of the housing 51 through an opening; the sleeve 55 is rotatably connected to the inner wall of the housing 51 through bearings. The sleeve 55 is attached to the inner wall of the vertical plate 54, and the inner wall is fitted to the outer wall of the rotating roller 4; the limiting ring 56 is fixed to the side wall of the sleeve 55, and the inner wall is attached to the outer wall of the rotating roller 4; the slide rail 57 is fixed to the top of the inner wall of the housing 51; the slider 58 is slidably engaged with the outer wall of the slide rail 57 and fixed to the top of the vertical plate 54; wherein, driven by the handwheel 52, the double-headed screw 53 causes the vertical plate 54 to drive the slider 58 to move on the slide rail 57, thereby causing the sleeve 55 to drive the limiting ring 56 to move;

[0030] In the specific implementation process, it is worth noting that when limiting the reflective film material, the operator turns the handwheel 52, which causes the double-headed screw 53 to rotate. The double-headed screw 53 drives the vertical plate 54 to move. The vertical plate 54 moves in the box 51. The vertical plate 54 drives the slider 58 to move. The slider 58 slides on the slide rail 57 to limit the vertical plate 54. The vertical plate 54 drives the sleeve 55 to move. The sleeve 55 drives the limiting ring 56 to move, so that the limiting rings 56 on both sides contact the two sides of the reflective film material. After completion, the operator stops turning the handwheel 52, thus realizing the limitation of the visible light to near-infrared broadband ultra-low reflective film material during transportation.

[0031] Furthermore, the locking device 6 includes a housing 61, a connecting post 62, a torsion spring 63, a pawl 64, a ratchet 65, and a connecting part 66. The housing 61 is fixed to the side wall of the housing 51; the connecting post 62 is rotatably connected to the inner wall of the housing 61 via a pin, and its end extends to the outside of the housing 61 through an opening; the two ends of the torsion spring 63 are respectively fixed to the outer wall of the connecting post 62 and the inner wall of the housing 61; the pawl 64 is fixed to the lower side of the connecting post 62; the ratchet 65 is engaged with the outside of the pawl 64 and fixed to the outside of the double-ended screw 53; the connecting part 66 is provided at the end of the double-ended screw 53; wherein, through the elastic force of the torsion spring 63, the connecting post 62 drives the pawl 64 to contact the ratchet 65, thereby locking the double-ended screw 53;

[0032] In the specific implementation process, it is worth noting that when the double-ended screw 53 rotates, the operator first rotates the connecting post 62. The connecting post 62 rotates around the pin as the center, and the connecting post 62 causes the torsion spring 63 to deform. The connecting post 62 drives the pawl 64 to rotate, causing the pawl 64 to disengage from the ratchet 65 and release the fixation of the double-ended screw 53. After the double-ended screw 53 has finished rotating, the operator releases the connecting post 62. At this time, the torsion spring 63 rebounds, and the elastic force causes the pawl 64 to re-engage with the ratchet 65, fixing the double-ended screw 53 in place. This achieves the locking of the double-ended screw 53 when it is not in use, preventing it from rotating.

[0033] Furthermore, the connecting part 66 includes a horizontal column 661 and a key block 662. The horizontal column 661 is fixed to the side wall of the handwheel 52; the key block 662 is fixed to the end of the double-ended screw 53, and its outer wall is inserted into the inner wall of the horizontal column 661; wherein, the handwheel 52 and the double-ended screw 53 are connected together through the cooperation of the horizontal column 661 and the key block 662.

[0034] In the specific implementation process, it is worth noting that when the operator rotates the limiting device 5, the operator moves the handwheel 52, which drives the horizontal column 661 to move. The horizontal column 661 is inserted into the end of the double-ended screw 53 and onto the key block 662. After that, the operator rotates the handwheel 52 to make the limiting device 5 work. After the rotation is completed, the operator moves the handwheel 52 to make the horizontal column 661 leave the key block 662 on the surface of the double-ended screw 53, thereby preventing others from rotating the handwheel 52.

[0035] Furthermore, the guiding device 2 includes a vertical plate 21, a guide roller 22, and a flattening part 23. The vertical plate 21 is fixed to the surface of the support platform 1 on the side near the column 3. The guide roller 22 is rotatably connected to the inner wall of the vertical plate 21 through a bearing. The flattening part 23 is disposed on the surface of the support platform 1 on the side away from the vertical plate 21. The vertical plate 21 and the guide roller 22 guide the visible light to near-infrared broadband ultra-low reflectance film raw materials during transportation.

[0036] In the specific implementation process, it is worth noting that the staff sequentially threaded the visible light to near-infrared broadband ultra-low reflectivity film material onto multiple guide rollers 22 to guide the reflectivity film material.

[0037] Furthermore, the flattening section 23 includes a support 231, a pressure roller 232, a cover 233, a hydraulic cylinder 234, a curved column 235, and a vertical rod 236. The support 231 is fixed to the surface of the support platform 1 on the side away from the vertical plate 21. There are two pressure rollers 232, one of which is rotatably connected to the inner wall of the support 231 via a bearing. The cover 233 is fixed to the top of the support 231 by bolts. The hydraulic cylinder 234 is fixed to the upper inner wall of the cover 233 by bolts, and its bottom extends into the interior of the support 231 through an opening. The curved column 235 is fixed to the bottom output end of the hydraulic cylinder 234 by bolts, and is rotatably connected to the end of the other pressure roller 232 via a bearing. The vertical rod 236 is fixed to the top of the curved column 235, passes through the support 231, and is movably connected to the support 231. The hydraulic cylinder 234 and the pressure roller 232 work together to flatten the visible light to near-infrared broadband ultra-low reflectivity film material.

[0038] In the specific implementation process, it is worth noting that a synchronizer is installed between the two hydraulic cylinders 234, enabling them to work simultaneously. The model of hydraulic cylinder 234 is CG5V-63 / 35-300. The connection between the hydraulic cylinder 234 and the external controller is electrical; the control interface of the hydraulic cylinder 234 is connected to the output terminal of the controller via a cable. The output signal of the external controller can precisely control the actions of the hydraulic cylinder 234, such as the extension and retraction of the piston and its speed. (The last sentence appears to be incomplete and possibly refers to a different topic.) The outer wide-wave ultra-low reflectivity film material passes through two pressure rollers 232. After that, the operator starts the hydraulic cylinder 234 through the external controller. The hydraulic cylinder 234 drives the curved column 235 to move. The curved column 235 drives the upright 236 to move in the bracket 231 to guide the curved column 235. The curved column 235 drives the upper pressure roller 232 to move, so that it contacts the outer wall of the reflective film material. After that, the operator stops the hydraulic cylinder 234 through the controller to flatten any wrinkles and unevenness on the surface of the reflective film material, ensuring that the material is in a flat state.

[0039] Specifically, when transporting the visible to near-infrared broadband ultra-low reflection film raw material, the operator first feeds the raw material sequentially onto multiple guide rollers 22, then through the rotating roller 4, and finally out from two pressure rollers 232. Next, the operator rotates the connecting column 62, which rotates around the pin, causing the torsion spring 63 to deform. The connecting column 62 then drives the pawl 64 to rotate, disengaging it from the ratchet 65. After this, the operator moves the handwheel 52, which moves the horizontal column 661, inserting it into the end of the double-ended screw 53 and onto the key block 662. Finally, the operator rotates the handwheel 52 again, causing the double-ended screw 53 to rotate. The double-ended screw 53 then moves the vertical plate 54, which moves within the housing 51. The vertical plate 54 also moves the slider 58, which slides on the slide rail 57. 54 drives the sleeve 55 to move, and the sleeve 55 drives the limiting ring 56 to move, so that the limiting rings 56 on both sides contact the two sides of the reflective film material. After that, the operator stops turning the handwheel 52. At this time, the operator moves the handwheel 52 to make the cross column 661 leave the key block 662 on the surface of the double-ended screw 53. Then, the operator releases the connecting column 62. At this time, the torsion spring 63 rebounds, and the elastic force makes the pawl 64 re-contact with the ratchet 65, fixing the double-ended screw 53. Finally, the operator starts the hydraulic cylinder 234 through the external controller. The hydraulic cylinder 234 drives the crank column 235 to move. The crank column 235 drives the upright 236 to move in the bracket 231 to guide the crank column 235. The crank column 235 drives the upper pressure roller 232 to move, so that it contacts the outer wall of the reflective film material. After that, the operator stops the hydraulic cylinder 234 through the controller and begins to transport the reflective film.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A visible to near-infrared broadband ultra-low reflectivity film raw material transport device, comprising a support platform (1), characterized in that: The support platform (1) is fixedly connected to a column (3), and the inner wall of the column (3) is rotatably connected to a roller (4) via a bearing. The visible light to near-infrared broadband ultra-low reflectivity film raw material transport device further includes: A guide device (2) is disposed outside the support platform (1); A limiting device (5) is disposed above the rotating roller (4); A locking device (6) is disposed on one side of the limiting device (5); The guide device (2) guides the visible light to near-infrared broadband ultra-low reflection film material during transportation, the limiting device (5) limits the visible light to near-infrared broadband ultra-low reflection film material during transportation to prevent it from deviating, and the locking device (6) locks the limiting device (5) when it is not in use.

2. The visible to near-infrared broadband ultra-low reflectance film raw material transport device according to claim 1, characterized in that: The limiting device (5) includes: The box (51) is fixed to the top of the column (3); A handwheel (52) is provided on the side wall of the housing (51); The double-ended screw (53) is rotatably connected to the inner wall of the housing (51) at both ends by bearings; A vertical plate (54) is threaded to the outer wall of the double-ended screw (53) and extends to the bottom of the housing (51) by means of an opening; The sleeve (55) is rotatably connected to the inner wall of the vertical plate (54) via a bearing, and the inner wall is sleeved on the outer wall of the rotating roller (4); The limiting ring (56) is fixed to the side wall of the sleeve (55), and its inner wall is attached to the outer wall of the roller (4); The slide rail (57) is fixed to the top of the inner wall of the box (51); The slider (58) is slidably engaged with the outer wall of the slide rail (57) and fixed to the top of the vertical plate (54); The double-headed screw (53), driven by the handwheel (52), causes the vertical plate (54) to move the slider (58) on the slide rail (57), thereby causing the sleeve (55) to move the limiting ring (56).

3. The visible to near-infrared broadband ultra-low reflectance film raw material transport device according to claim 2, characterized in that: The locking device (6) includes: The outer shell (61) is fixed to the side wall of the box (51); The connecting post (62) is rotatably connected to the inner wall of the outer shell (61) by a pin, and its end extends to the outside of the outer shell (61) through an opening; A torsion spring (63) is fixed at both ends to the outer wall of the connecting post (62) and the inner wall of the outer shell (61), respectively. A pawl (64) is fixed to the lower side of the connecting post (62); A ratchet (65) is engaged with the outside of the pawl (64) and fixed to the outside of the double-ended screw (53); A connecting part (66) is provided at the end of the double-ended screw (53); The torsion spring (63) causes the connecting post (62) to drive the pawl (64) to contact the ratchet (65), thereby locking the double-ended screw (53).

4. The visible to near-infrared broadband ultra-low reflectance film raw material transport device according to claim 2, characterized in that: The connecting part (66) includes: A horizontal column (661) is fixed to the side wall of the handwheel (52); The key block (662) is fixed to the end of the double-ended screw (53), and its outer wall is inserted into the inner wall of the cross column (661); The handwheel (52) and the double-ended screw (53) are connected together through the cooperation of the horizontal column (661) and the key block (662).

5. The visible to near-infrared broadband ultra-low reflectance film raw material transport device according to claim 1, characterized in that: The guiding device (2) includes: The upright plate (21) is fixed to the surface of the support platform (1) on the side near the column (3); The guide roller (22) is rotatably connected to the inner wall of the vertical plate (21) via a bearing; A flattening part (23) is provided on the surface of the support platform (1) on the side away from the vertical plate (21); The visible to near-infrared broadband ultra-low reflectivity film raw materials are guided during transportation by the upright plate (21) and the guide roller (22).

6. The visible to near-infrared broadband ultra-low reflectance film raw material transport device according to claim 5, characterized in that: The flattening part (23) includes: A bracket (231) is fixed to the side of the support platform (1) away from the vertical plate (21); There are two pressure rollers (232), one of which is rotatably connected to the inner wall of the bracket (231) via a bearing; The cover (233) is bolted to the top of the bracket (231); The hydraulic cylinder (234) is bolted to the upper inner wall of the cover (233) and its bottom extends into the interior of the bracket (231) through an opening; The curved column (235) is bolted to the bottom output end of the hydraulic cylinder (234) and rotatably connected to the end of another pressure roller (232) via a bearing; The upright (236) is fixed to the top of the curved column (235), passes through the bracket (231), and is movably connected to the bracket (231); The hydraulic cylinder (234) and the pressure roller (232) work together to flatten the visible to near-infrared broadband ultra-low reflectivity film material.

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