CN102841397A - Multilayer reflective sheet and its manufacturing method - Google Patents

Abstract

A multilayer film reflector and its making method, the multilayer film reflector main body is a multilayer film structure formed by stacking multiple layers of high molecular polymers, wherein at least there is a birefringent material layer. According to one embodiment, one or more protective layers and one or more functional films, which are generally formed of a high molecular polymer material having uv-resistant, scratch-resistant and high-reflective effects, may be disposed on the inner and outer sides of the multi-layer film structure. In the method for manufacturing the multilayer film reflector, a co-extrusion machine can be used for implementing a co-extrusion process, a copolymer is formed after co-extrusion of a plurality of materials, and the multilayer film reflector is formed after controlling the discharge amount and the thickness of the copolymer. The multilayer film reflector plate can be applied to sunglasses, snow goggles or diving goggles, and has the effects of polarization and glare elimination.

Description

Multilayer reflective sheet and its manufacturing method

technical field

The disclosure of the present invention proposes a multilayer reflective sheet and a manufacturing method thereof, in particular a lens film combined with a reflective multilayer film structure and a process thereof.

Background technique

The treatment of multi-layer film lenses will design the functions of each layer according to its use, such as waterproof, anti-reflection, structural reinforcement, scratch resistance, etc., and the light transmission effect of the lens can also be changed by absorbing specific wavelengths of light through dyes.

The prior art is as disclosed in U.S. Patent No. 4,878,748 (application date: March 28, 1989), which discloses a polarizing lens (Ultraviolet radiation and blue lightblocking polarizing lens) for preventing ultraviolet rays and blue light. The lenses considered in terms of visibility and safety, such as the polarizer disclosed in the prior art shown in Figure 1, the lens 10 is a polarizer, which can basically block parallel polarized light and light of a specific wavelength, mainly through its surface A nano-scale filter layer 14 determines the wavelength range of the filter. The overall lens 10 includes a plastic substrate 12 forming the lens body. The structure is a multi-layer film, which has a polarizing layer 16 to isolate harmful Ultraviolet light and blue light, the outside is coated with a layer of dye 18 to absorb light of a specific wavelength band.

FIG. 2 shows the relationship between the wavelength and the transmittance of the filter effect produced by the surface coating of the existing lens. Among them, waveform A shows that an orange dye is formed in the wavelength range of ultraviolet light in the front part, which has partial ultraviolet light penetration, and has good penetration in the visible light band in the latter part. Waveform B represents a red dye, which also has some penetration in the ultraviolet light band, and also has good penetration in the visible light band in the latter part. Waveform C indicates that the mixed red and orange dyes have good penetration in visible light, but have no problem in ultraviolet light penetration.

Referring again to the polarizer disclosed in US Patent No. 6,659,608 (application date: December 19, 2001), this is a polarizer applied to sunglasses and ski goggles. This type of lens is a multi-layer film structure, which combines a polarizing layer and a thermoformed dyed film, wherein the main lens structure has a colorant (colorant) that can cooperate with the polarizing layer to correct the chromaticity (hue).

With regard to the manufacturing methods for forming the lens structures of the above-mentioned prior art, the prior art includes a method of manufacturing a polarizer disclosed in U.S. Patent No. 6,613,433 (application date: September 5, 2001). The manufacturing method includes a multilayer film Attach to the polarizer, then place the polarizer and the multilayer film in the mold, and then inject these materials into the mold by in-mold forming, so the multilayer film material and the polarizer are integrally formed For polarizers.

Contents of the invention

The multilayer reflective sheet disclosed in this specification is a reflective multilayer lens film, which can be applied to sunglasses, snow goggles or diving goggles, and has polarizing and anti-glare effects. Other functional membranes.

According to an embodiment of the multilayer film reflection sheet, the main body of the multilayer film reflection sheet is a multilayer film structure formed by stacking multiple layers of high molecular polymers, which at least includes a birefringent material layer, and the inside and outside of the reflection sheet Or one side thereof may further include a protective layer and a functional film.

The functional films on the inner and outer sides of the multilayer reflective sheet are formed of high molecular polymer materials with anti-ultraviolet light, scratch resistance and high reflection effects, and the surface of the functional film can be coated with a high reflective film or coated Dyes, or can be compounded with granules.

Still according to another embodiment, one side or both sides of the multi-layer reflective sheet can be provided with a base material of high molecular polymer material, and the base material can be mixed with particles, or can have a surface structure.

According to the multilayer film reflection sheet of the present invention, wherein the multilayer film reflection sheet includes one or more protective layers formed between the multilayer film structure and the one or more functional films, or formed between The outer side of the structure formed by the multilayer film structure and the one or more functional films.

According to the multi-layer reflective sheet of the present invention, wherein, the protective layer is formed of a high molecular polymer material capable of filtering ultraviolet light.

According to the multilayer reflective sheet of the present invention, the functional film includes a first functional film and a second functional film, which are respectively formed on both sides of the multilayer film structure.

According to the multi-layer reflective sheet of the present invention, wherein, the first functional film is formed of a polymer material having anti-ultraviolet light, anti-scratch and high reflection effects.

According to the multi-layer reflective sheet of the present invention, wherein, the second functional film is formed of a high molecular polymer material having effects of filtering ultraviolet light and anti-reflection.

According to the multilayer reflective sheet of the present invention, the surface of the first functional film or the second functional film is coated with a high reflective film.

According to the multilayer reflective sheet of the present invention, the surface of the first functional film or the second functional film is coated with a dye.

According to the multilayer reflective sheet of the present invention, particles are kneaded in the material of the first functional film or the second functional film.

According to the multilayer reflective sheet of the present invention, the particles are metal oxide materials that can reflect infrared rays.

According to the multilayer reflective sheet of the present invention, one or more substrates are provided on one side or both sides of the multilayer reflective sheet.

According to the multilayer film reflective sheet of the present invention, particles are kneaded in the base material.

According to the multilayer reflective sheet of the present invention, the substrate has a surface structure.

According to the multi-layer reflective sheet of the present invention, the birefringent material layer has characteristics of different refractive indices in X and Y directions on the plane.

The present invention also provides a protective mirror using the multi-layer reflective sheet.

According to an embodiment of the manufacturing method of the multilayer reflective sheet, the manufacturing method includes first feeding the multilayer film material, including multilayer polymer materials, functional film materials, etc. of the multilayer reflective sheet, and then using co-extrusion The machine (co-extruder) receives these feeds, and implements the co-extrusion (co-extrusion) process, after cleaning, drying, heating, mixing, filtering, and controlling the output, thickness and size of the formed copolymer , extruded (extruded) to form a multilayer film reflective sheet.

In the manufacturing method, it may also include forming a base material on the surface of the copolymer, including forming a multi-layer film reflective sheet with the base material and the above-mentioned multi-layer film material by laminating or in-mold technology.

After cutting the above-mentioned multi-layer reflective sheet, it can be applied to the lens of protective glasses, such as snow goggles, diving goggles and other protective goggles used in environments requiring high anti-reflection.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the method includes: using a co-extruder to feed the multilayer film material, the multilayer film material includes the multilayer height of the multilayer reflective sheet Molecular polymer materials, one or more layers of functional film materials; the co-extruder receives the feed of the multi-layer film materials, and implements a co-extrusion process, and the co-extrusion process includes: cleaning and drying the multi-layer Membrane material; heating and kneading the multi-layer membrane material with different feed ports to form a copolymer; filtering impurities of the copolymer; controlling the output of the copolymer; controlling the thickness and size of the copolymer; and extruding to form the multi-layer film reflection sheet.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the multilayer film material further includes one or more layers of protective layer materials.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the material of the protective layer is a polymer material having the effect of filtering ultraviolet light.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the formed multilayer reflective sheet is cut and combined with the frame.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the functional film material is a high molecular polymer material with anti-ultraviolet light, anti-scratch and high reflection effects.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the surface of the functional film is coated with a high reflective film.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the surface of the functional film is coated with a dye.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the material of the functional film is kneaded with particles.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the particles are metal oxide materials that can reflect infrared rays.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, wherein the feed includes a base material, which is combined into the copolymer after the co-extrusion process.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the base material is mixed with particles through the co-extrusion process.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the co-extrusion process includes the step of extruding using the mold or roller of the co-extruder to form a surface structure on the surface of the base material.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the said feed includes materials for forming the birefringent material layer.

According to the manufacturing method of the multilayer reflective sheet of the present invention, wherein the material of the birefringent material layer is subjected to uniaxial or biaxial stretching through a stretching process to form the multilayer A layer of birefringent material within a film reflector.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the birefringent material layer has characteristics of different refractive indices in X and Y directions on the plane.

Another method for manufacturing a multilayer reflective sheet according to the present invention, wherein the method includes: feeding a multilayer film material, and the multilayer film material includes a multilayer polymer polymer of the multilayer reflective sheet material, one or more layers of functional film material; using a co-extruder to receive the feed of the multi-layer film material, and implement a co-extrusion process, the co-extrusion process includes: cleaning and drying the multi-layer film material; Heating and kneading the multi-layer film material fed to form a copolymer; filtering impurities of the copolymer; controlling the output of the copolymer; controlling the thickness and size of the copolymer; extruding the copolymer and attaching the base material to the surface of the copolymer to form the multi-layer reflective sheet.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the multilayer film material further includes one or more layers of protective layer materials.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the material of the protective layer is a polymer material having the effect of filtering ultraviolet light.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the base material and the copolymer are combined by an in-mold molding process.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the formed multilayer reflective sheet is cut and combined with the frame.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the functional film material is a high molecular polymer material with anti-ultraviolet light, anti-scratch and high reflection effects.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the surface of the functional film is coated with a high reflective film.

According to the manufacturing method of the multilayer reflective sheet of the present invention, the surface of the functional film is coated with a dye.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the material of the functional film is kneaded with particles.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the particles are metal oxide materials that can reflect infrared rays.

According to the manufacturing method of the multilayer reflective sheet of the present invention, particles are added to the base material.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, wherein, the surface structure is formed on the surface of the base material in the step of extruding with a mold or a roller.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the said feed includes materials for forming the birefringent material layer.

According to the manufacturing method of the multilayer reflective sheet of the present invention, wherein the material of the birefringent material layer is subjected to uniaxial or biaxial stretching through a stretching process to form the multilayer A layer of birefringent material within a film reflector.

According to the manufacturing method of the multi-layer reflective sheet of the present invention, the birefringent material layer has characteristics of different refractive indices in X and Y directions on the plane. According to yet another embodiment, one side or both sides of the multilayer reflective sheet can be provided with a substrate of high molecular polymer material, and the substrate can be mixed with particles, or can have a surface structure.

Description of drawings

Fig. 1 shows a schematic diagram of a prior art polarizer;

Fig. 2 shows the relationship between the wavelength and the transmittance of the filter effect generated by the surface coating of the existing lens;

Fig. 3 is the embodiment and light path schematic diagram of the multi-layer film reflecting plate of the present invention;

4 is a schematic diagram of an embodiment of a functional film applied to a multilayer reflective sheet of the present invention;

Fig. 5 shows one of the schematic diagrams of the embodiments of the multilayer reflective sheet of the present invention;

Fig. 6 shows the second schematic diagram of the embodiment of the multilayer reflective sheet of the present invention;

Fig. 7 shows the third schematic diagram of the embodiment of the multilayer reflective sheet of the present invention;

Figure 8 shows the fourth schematic diagram of the embodiment of the multilayer reflective sheet of the present invention;

Fig. 9 shows the fifth schematic diagram of the embodiment of the multilayer reflective sheet of the present invention;

Figure 10 shows the sixth schematic diagram of the embodiment of the multilayer reflective sheet of the present invention;

Figure 11 describes one of the flow charts of the embodiment of the manufacturing method of the multilayer reflective sheet of the present invention;

Fig. 12 describes the schematic diagram of the co-extruder implementing the production of the multilayer film reflection sheet of the present invention;

Fig. 13 depicts the second flow chart of the embodiment of the manufacturing method of the multilayer reflective sheet of the present invention;

FIG. 14 depicts the third flow chart of the embodiment of the manufacturing method of the multilayer reflective sheet of the present invention.

Detailed ways

Since it is emitted to the ground (such as snow), and then reflected by the ground to produce polarized light that is projected on the human eye, it will cause glare. Therefore, this specification discloses a multilayer reflective sheet, which is a multilayer reflective sheet. A reflective lens film with a multi-layer film structure, which can be applied to sunglasses, snow goggles or diving goggles, has polarizing and anti-glare effects, and can be applied and attached to other functional films. In one embodiment, the reflectivity of the inner and outer layers of the lens film can be designed differently, and the inner layer can be attached with a polarizing film or other functional film, or used for anti-reflection treatment, or formed by coating or using a multilayer film (Multilayer Film, MOF) to form an anti-ultraviolet film.

In addition, anti-fog effects can be produced through special treatment, such as coating anti-fog treatment additives on the lens film, while the exterior can be enhanced by coating a hardened protective film or attaching hard materials to enhance the anti-wear and anti-scratch effects. The outside can be attached, coated or multi-layered to form a color layer, or an anti-ultraviolet film can be attached.

The reflective polarizer proposed in this specification does not need to add specific ingredients to absorb light of a specific wavelength band, but can cause an anti-ultraviolet effect in an interference manner, and at the same time only allow visible light to pass through. Colored lenses can also be made using multilayer films or dyes.

After the combination of multi-layer film structure and various functional films, the advantages of this type of reflective multi-layer film reflector include that it can eliminate glare, and the reflected wavelength band light can be adjusted by material and thickness; reflective polarizer is not Absorption type, so the heat will not accumulate. In one embodiment, there is no need to add any absorption particles, and the polarization efficiency is high, and the function of preventing glare is strong; in another embodiment, it can be used in the substrate or functional film Appropriately add particles to produce anti-reflection effect.

FIG. 3 is a schematic view showing an embodiment of the multilayer reflective sheet proposed in this specification and an optical path.

One of the embodiments of the multilayer film reflection sheet is shown in the figure, the main body of the multilayer film reflection sheet is a multilayer film structure 30 formed by combining multiple layers of polymer materials, and the multilayer film reflection sheet may include one or more protection The layers (31, 32) are formed between the multilayer film structure 30 and the functional film (33, 34), or formed outside the structure formed by the multilayer film structure 30 and the functional film. In this example, a first protective layer 31 and a second protective layer 32 are formed on the inner side and outer side (or one side thereof) of the multilayer film structure 30, and first functional films can also be formed on the outer sides of each protective layer. 33 and the second functional film 34.

The above-mentioned protective layer is a molecular polymer material that can filter ultraviolet light, and can also use dyes to filter part of visible light, and at the same time can make the light incident from outside become polarized light. In this embodiment, the outer side of the multi-layer film reflector is the side close to the strong external light, and light with polarized light and non-polarized light such as sunlight enters. After the non-polarized light enters the first functional film 33, it is The light reflected by the first protective layer 31 formed by the high molecular polymer material for filtering ultraviolet light, and then enters the main multilayer film structure 30 and penetrates and exits is polarized light. On the inner side of the multilayer film reflection sheet, such as the side close to human eyes or indoors, there is low-intensity non-polarized light directed to the multilayer film reflection sheet, and the non-polarized light passes through the second functional film 34, and can also be It is reflected by the second protective layer 32 formed of high molecular polymer material having the effect of filtering ultraviolet light.

In the embodiment of the multilayer reflective sheet shown in FIG. 3 , the multilayer film structure 30 is a structure formed by stacking multiple layers of high molecular polymers, which particularly includes at least a birefringent material layer 301 , as shown in the figure. The stacked positions of the birefringent material layers 301 of the layered film structure 30 are not limited by the figure. Therefore, the multi-layer reflective sheet proposed in this specification has the effects of anti-ultraviolet and polarized light at the same time.

The birefringent material layer 301 can be a multilayer polyester material film, and the material is uniaxially or biaxially stretched through a stretching (stretching) process, and at least one direction with a predetermined direction can be formed between the optical film layers of the polyester material. The difference in refractive index of the value makes the birefringent material layer 301 mentioned here have the characteristics of having different refractive indices in the two directions of X and Y on the plane, or on the plane of the birefringent material layer 301, X, Y and vertical The Z direction has a different refractive index characteristic.

One or more protective layers (such as the first protective layer 31 and the second protective layer 32) can be formed on the outside (inside or outside) of the multilayer film structure 30, and the protective layer can be formed by a high molecular polymer material having the effect of filtering ultraviolet light .

The functional film includes a first functional film 33 and a second functional film 34 that are respectively formed on the inner side, the outer side, or one side of the multilayer film structure 30. Examples of functional films can refer to the application examples shown in FIG. 4 . The first functional film 33 and the second functional film 34 include multi-layer polymer layers stacked on top of each other, using materials to form such as a waterproof layer 41, an anti-reflection layer 42, a reinforcement layer 43, a bonding layer 44, and a scratch-resistant layer (45 , 47) and impact-resistant optical grade PC safety lens 46 and so on.

Among them, the waterproof layer 41 can make the surface of the lens not easy to get water, and it is easier to clean; the anti-reflection layer 42 has a multi-layer film structure, and the anti-reflection film can make the light relatively effectively reach the retina, so that the eyes can see more clearly; the strengthening layer 43 is used to improve The hardness of the lens has the effect of impact resistance; the bonding layer 44 is a multi-layer film (titanium/silicon crystal) structure, which can make the functional film firmly attached to the lens; the first anti-scratch layer 45 is arranged in front of the lens 46, and the surface is coated with permanent silicon The base layer; the second anti-scratch layer 47 is arranged behind the mirror surface 46, and the surface is coated with a permanent silicon base layer.

Through the selection of these functional films and the combination of multiple layers, according to one embodiment, the above-mentioned first functional film 33 can be formed of polymer materials with anti-ultraviolet light, anti-scratch and high-reflection effects, or can be added with high-transparency Substances such as metal oxides such as infrared heat shielding particles (ATO), ultraviolet light absorbers, etc. The second functional film 34 may be formed of a high molecular polymer material capable of filtering ultraviolet light and anti-reflection. Other embodiments include coating the surface of the first functional film 33 or the second functional film 34 with a high reflection film; or coating the surface with dye; or using a co-extrusion process to make the first functional film 33 or the second functional film Particles are kneaded in the material of the film 34 . These particles are metal oxide materials such as high-transparency infrared heat-shielding particles (ATO) and ultraviolet light absorbers.

FIG. 5 to FIG. 10 below describe schematic diagrams of various embodiments of the multilayer reflective sheet proposed in this specification.

The basic form of the multilayer reflective sheet in FIG. 5 includes a multilayer film structure 50 formed by stacking multiple polymers, which at least includes a birefringent material layer as shown by the cross-hatching in the figure. In this example, The two sides of the multilayer film structure 50 have a first functional film 51 and a second functional film 52 .

The schematic diagram of the embodiment of the multilayer reflective sheet shown in FIG. 6 is mainly composed of a multilayer film structure 60, which can also be formed by stacking multiple layers of high molecular polymers, which can include a birefringent material layer (as shown by the hatching), A first functional film 61 and a second functional film 62 may be formed on the inner and outer sides of the multilayer film structure 60 , and in this example, a substrate 63 is attached to one side of the second functional film 62 .

7 shows a schematic diagram of an embodiment of a multilayer film reflector. The main body of the multilayer film reflector is a multilayer film structure 70 having at least one birefringent material layer (as shown by the cross-hatching line). The two layers of the multilayer film structure 70 The side has a first functional film 71 and a second functional film 72. The difference between this example and FIG. 6 is that substrates are formed on both sides, for example, a first substrate 73 and a second substrate 74 are formed on the outside of the functional film.

FIG. 8 is a schematic diagram of yet another embodiment of a multilayer reflective sheet. The main body of the multilayer film reflector is a multilayer film structure 80 with at least one layer of birefringent material layer (shown by hatching). In this example, the difference from the embodiment shown in FIG. The bonding relationship in the process is different. For example, one side of the multilayer film structure 80 (upper in the figure) is formed with a first substrate 83, while the other side is a second functional film 82, and the outer side of the first substrate 83 is formed. There is a first functional film 81 , and a second substrate 84 is formed on one side of the second functional film 82 .

FIG. 9 shows a schematic diagram of yet another embodiment of a multilayer reflective sheet. The main body of the multilayer film reflector is a multilayer film structure 90. This example has a different arrangement from the structure described in FIG. material 94 , the first functional film 91 is formed on the outside of the first substrate 93 , and the second functional film 92 is formed on the outside of the second substrate 94 .

FIG. 10 shows a schematic diagram of an embodiment of a multilayer reflective sheet. In this example, the main body of the multilayer film reflector is a multilayer film structure 100, wherein the section line shows that the structure has at least a birefringent material layer with a polarizing effect or a similar functional structure, and the two sides of the multilayer film structure 100 are respectively provided with first The substrate 103 and the second functional film 102, the outer side of the first substrate 103 has the first functional film 101, and the other side of the second functional film 102 includes the second substrate 104, in this example, the same as the above-mentioned figures The difference from the illustrated embodiment is that the outer side of the second substrate 104 is shown to be formed with a surface structure 105, and the shape of the surface structure 105 will be determined according to the mold used in the manufacturing method or the scoring on the roller. These surface structures 105 It can assist the reflective ability of the multilayer film reflector.

The surface structure on the base material includes anti-fog treatment, which has the functions of anti-scratch, anti-shock, anti-ultraviolet, anti-fog and so on. The above-mentioned multi-layer reflective sheet can become a protective mirror after being installed in the mirror frame. At this time, the outer surface of the outer lens can be hardened, including vacuum coating treatment, so that the lens has good impact resistance and wear resistance. The coated lens has functions such as impact resistance, scratch resistance, and UV resistance.

According to the various embodiments shown above, it is obvious that one or more substrates are arranged on one side or both sides of the multilayer film reflective sheet proposed in this specification, and it is not limited to the arrangement described in the above figures, and basically Particles can be mixed in the material through the process.

For the method of manufacturing the multilayer reflective sheet described in this specification, refer to the flow chart of the embodiment of the manufacturing method described in FIG. 11 . This example refers to the co-extrusion system disclosed in Figure 12. Through the feeding of multiple materials, the above-mentioned two or more high molecular polymer materials are laminated to form a staggered array by co-extrusion. Multilayer film structure. The step starts as in S111, feeding multilayer film material, which includes multilayer polymer material and one or more layers of functional film material in the multilayer film reflection sheet, and can also include a layer under specific requirements Or multi-layer protective layer materials, according to the different types of embodiments described in the above figures, there are different feeding patterns.

The state of the feed can refer to the schematic diagram of the co-extruder for the production of the multilayer film reflective sheet described in FIG. In the material area 122, the multilayer film material includes necessary protective layer materials and various functional film materials for implementation, such as multilayer high molecular polymer materials including multilayer film reflectors, one or more multilayer functional film materials, a One or more layers of protective layer materials, etc. The materials of the substrate and each layer of film are mostly thermoplastic polymers, such as polymethyl methacrylate (Poly (Methyl methacrylate), PMMA), polycarbonate resin (Polycarbonate, PC), polymethyl methacrylate Styrene (poly (Methyl methacrylate Styrene), MS) and polystyrene (PolyStyrene, PS), and polyethylene terephthalate (Poly (Ethylene Terephthalate), PET), polyethylene naphthalate ( Poly (Ethylene Naphthalate), PEN), polypropylene (Polypropylene, PP) and other materials in the group of at least one material or their copolymers, but not limited to the above.

After being fed by the main feed area 120 and the secondary feed area 122, it is propelled by the feed screw 123 to start the co-extrusion process (Fig. 11, 12). Materials) and other required materials are dedusted and cleaned (step 112) and then dried and baked (step S113) to prepare the materials for kneading and kneading operations. Mixing the polymer usually requires the heater 124 to heat the polymer to make it melt (step S114). The shearing effect generated during the mixing process will generate high heat. It is necessary to pay attention to the problem of cracking of the material when the temperature is too high. The mixing process can also be timely Add some processing aids or modifiers to improve the mechanical or thermal properties of the material, etc. (step S115).

After heating and kneading, the multi-layer film materials (or may include substrate materials) at different feed ports are formed into copolymers. The kneading process can be fully mixed by a Henschel mixer, a rotary belt mixer, a drum mixer, etc., and then kneaded by a kneading device to gel the polymer material. The copolymer after kneading and kneading is filtered through a filter screen (step S116) for impurities, and the output is controlled by the gear (step S117), and may include controlling the thickness and size of the extrudate (step S118), and according to The flow channel design and integration of the feed can also co-extrude multi-layer membranes or diffuser plates with different material thicknesses.

Afterwards, the molten high molecular polymer material is continuously co-extruded from the die head 125 after being divided into multiple layers by the splitter unit (step S119), and the function of the die head (such as T-die head (T-die)) 125 can be Make the temperature and thickness of the extruded plastic relatively uniform, and effectively control the discharge volume during extrusion and the thickness and size of the diaphragm during extrusion. At this time, the thickness of the extruded diaphragm is determined by the gap between the roller 126 of the extruder and the discharge to adjust.

Extruded through the die head 125, a certain thickness can be obtained, and the thickness of the substrate can be adjusted through the roller 126. In one embodiment, the surface structure can also be produced for one surface or the upper and lower surfaces of the die, and finally pass through the cooling platform 127 curing materials. In this cooling step, one of the embodiments is to carry out the cooling step at a specific temperature in this cooling zone, such as the cooling temperature is between 60°C and 120°C, and the cooling time is between 1 and 5 seconds. Perform heat treatment (heat setting, Heat setting) to make the multi-layer film reflective sheet have better formability. Thus, a multilayer film reflective sheet is formed by extrusion. Finally, whether the characteristics of the reflecting sheet meet the requirements with the detection device 128, 128'.

If the multi-layer reflective sheet has a specific purpose, then in step S120, it can be cut and put into a specific device, such as being installed in a mirror frame to form a protective mirror.

The above-mentioned co-extrusion process performed by the co-extruder of FIG. Stretching the material uniaxially or biaxially by the stretching process can form the effect of refractive index difference in each direction between the optical film layers of the polyester material, so that the birefringent material layer has different X and Y directions on the plane. The property of the refractive index, or the property of having a different refractive index than the vertical Z direction. Biaxially stretch the material forming the birefringent material layer using a stretching process, wherein sequential biaxial stretching can be used, stretching several times in the longitudinal direction (MD), stretching several times in the transverse direction (TD), or simultaneously Biaxial stretching, longitudinal and transverse stretching several times, and different film layers after stretching have a certain difference in refractive index.

Figure 13 is a flow chart of an embodiment of a method for manufacturing a multi-layer reflective sheet. At the beginning of the figure, as in step S131, the multi-layer film material is fed from the feed port of the co-extruder. The multi-layer film material in this example may include the above-mentioned protective layer and other materials, which can be changed according to various actual needs. Afterwards, after cleaning, drying, heating, kneading, filtering impurities, controlling discharge volume, controlling thickness and size and other co-extrusion processes (step S133), finally extruding to form a multi-layer reflective sheet.

The step is then as in S135, forming a functional film on the inner and outer sides of the multi-layer reflective sheet by laminating, and the formed combination will have the functions of waterproof, anti-reflection, anti-fog, anti-scratch or structural reinforcement, or a combination thereof. As in step S137 , attach the base material to the combination of the multilayer reflective sheet and the functional film. The base material can produce anti-reflection effect by adding particles, or use stamper or roller embossing to form surface structure, so that it can produce anti-scratch, anti-shock, anti-ultraviolet, anti-fog and other functions. Then, as in step S139, the extrudate is cut and used on desired objects.

Next, the flow chart of another embodiment of the manufacturing method of the multilayer reflective sheet is described in FIG. 14 .

As in step S141, the multi-layer film material is also fed through one or more feed ports according to the required type, and then as in step S143, the co-extrusion process is performed to form a copolymerized multi-layer film reflection sheet after the co-extrusion process. The difference from the process described in Figure 13 is that after laminating the functional film (step S145), this example uses the In Mold Decoration/Forming (IMD) process, which needs to be processed before in-mold molding. Obtain the required size of the multilayer reflective sheet by cutting (step S147). Therefore, as in step S149, the base material and the copolymer formed by co-extrusion are combined with other materials by in-mold molding.

In the above-mentioned in-mold molding step, the copolymer formed by co-extrusion and the substrate to be combined, functional film, protective layer and other materials are placed in the mold, and then injection molded into the final product along with the substrate, and the injection molded The substrate material is laminated to the copolymer produced by the co-extrusion process.

To sum up, this specification proposes a reflective multilayer reflective sheet, in which the main body is a multilayer film structure and has a polarizing effect. It is used in conjunction with various functional films to make it anti-ultraviolet, scratch-resistant and High reflection effect.

The above description is only a preferred feasible embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent structural changes formed by using the description of the present invention and the contents of the accompanying drawings should be included in the scope of the present invention. Inside.

Explanation of main component symbols

Lens 10 Filter layer 14

Plastic substrate 12 Polarizing layer 16

Dye 18 Wave A, B, C

Multi-layer film structure 30 The first protective layer 31

The second protective layer 32 The first functional film 33

birefringent material layer 301

Second functional film 34 waterproof layer 41

Anti-reflection layer 42 Strengthening layer 43

Bonding layer 44 The first anti-scratch layer 45

Second anti-scratch layer 47

Lens 46 Multi-layer film structure 50

First functional film 51 Second functional film 52

Multilayer film structure 60 First functional film 61

Second functional film 62 Substrate 63

Multilayer film structure 70 First functional film 71

Second functional film 72 First substrate 73

Second substrate 74 Multilayer film structure 80

First functional film 81 Second functional film 82

First base material 83 Second base material 84

Multilayer film structure 90 The first functional film 91

Second functional film 92 First substrate 93

Second substrate 94 Multilayer film structure 100

First functional film 101 Second functional film 102

First base material 103 Second base material 104

Surface structure 105 Co-extrusion process 11

Main feeding area 120 Secondary feeding area 122

Heater 124 Feed screw 123

Die head 125 Roller 126

Cooling platform 127 Detection device 128, 128'

Steps S111-S120 One of the manufacturing methods of the multi-layer film reflection sheet

Steps S131-S139 The second method of making multi-layer film reflection sheet

Steps S141 to S149 are the third method of manufacturing the multilayer reflective sheet.

Claims (45)

1. a multilayer film reflector plate is characterized in that, comprising:

The layer high molecule polymkeric substance piles up the multi-layer film structure of formation mutually, and wherein, said multi-layer film structure comprises birefringent material layer at least; And

One or more functional membranes are incorporated into the inboard and the outside of said multi-layer film structure or a side wherein.

2. multilayer film reflector plate according to claim 1; It is characterized in that; Said multilayer film reflector plate comprises one or more protective seams; Be formed between said multi-layer film structure and the said one or more functional membrane, or be formed at the outside of said multi-layer film structure and the formed structure of said one or more functional membranes.

3. multilayer film reflector plate according to claim 2 is characterized in that said protective seam is formed by the macromolecule polymer material with filtering ultraviolet effect.

4. multilayer film reflector plate according to claim 1 is characterized in that, said functional membrane comprises first functional membrane and second functional membrane, is formed at the both sides of said multi-layer film structure respectively.

5. multilayer film reflector plate according to claim 4 is characterized in that, said first functional membrane by have ultraviolet light, macromolecule polymer material scratch resistant and high reflecting effect forms.

6. multilayer film reflector plate according to claim 4 is characterized in that, said second functional membrane is formed by the macromolecule polymer material with filtering ultraviolet and anti-reflection effect.

7. according to claim 5 or 6 described multilayer film reflector plates, it is characterized in that the surface of said first functional membrane or said second functional membrane is coated with highly reflecting films.

8. according to claim 5 or 6 described multilayer film reflector plates, it is characterized in that the surface coated dyestuff of said first functional membrane or said second functional membrane.

9. according to claim 5 or 6 described multilayer film reflector plates, it is characterized in that the material of said first functional membrane or said second functional membrane is mixing to have particle.

10. multilayer film reflector plate according to claim 9 is characterized in that, but said particle is the metal oxide materials of reflected infrared.

11. multilayer film reflector plate according to claim 1 is characterized in that, the one-sided or both sides of said multilayer film reflector plate are provided with one or more base materials.

12. multilayer film reflector plate according to claim 11 is characterized in that, said substrate material is mixing to have particle.

13. multilayer film reflector plate according to claim 11 is characterized in that said base material has surface structure.

14. multilayer film reflector plate according to claim 1 is characterized in that, said birefringent material layer has the characteristic of X on the plane, Y both direction different refractivity.

15. protective glass that uses multilayer film reflector plate according to claim 1.

16. the method for making of a multilayer film reflector plate is characterized in that, said method comprises:

Utilize extruder charging multi-layer film material altogether, said multi-layer film material comprises layer high molecule polymeric material, one or more layers functional film material of said multilayer film reflector plate;

Said extruder altogether receives the charging of said multi-layer film material, implements extrusion technique altogether, comprising:

Cleaning and dry said multi-layer film material;

The said multi-layer film material of heating and mixing different feeds mouth forms multipolymer;

Filter the impurity of said multipolymer;

Control the discharge-amount of said multipolymer;

Control the thickness and the size of said multipolymer; And

Extrude and form said multilayer film reflector plate.

17. the method for making of multilayer film reflector plate according to claim 16 is characterized in that, said multi-layer film material also comprises one or more layers protective layer material.

18. the method for making of multilayer film reflector plate according to claim 17 is characterized in that, said protective layer material is the macromolecule polymer material with filtering ultraviolet effect.

19. the method for making of multilayer film reflector plate according to claim 16 is characterized in that, the said multilayer film reflector plate of formation is incorporated into mirror holder after cutting.

20. the method for making of multilayer film reflector plate according to claim 16 is characterized in that, said functional film material is the macromolecule polymer material with ultraviolet light, scratch resistant and high reflecting effect.

21. the method for making of multilayer film reflector plate according to claim 20 is characterized in that, the surface of said functional membrane is coated with highly reflecting films.

22. the method for making of multilayer film reflector plate according to claim 20 is characterized in that, the surface coated dyestuff of said functional membrane.

23. the method for making of multilayer film reflector plate according to claim 20 is characterized in that, the material of said functional membrane is mixing to have particle.

24. the method for making of multilayer film reflector plate according to claim 23 is characterized in that, but said particle is the metal oxide materials of reflected infrared.

25. the method for making of multilayer film reflector plate according to claim 16 is characterized in that, comprises substrate material in the said charging, is incorporated in the said multipolymer behind the extrusion technique altogether through said.

26. the method for making of multilayer film reflector plate according to claim 25 is characterized in that, said substrate material has a particle through said altogether extrusion technique is mixing.

27. the method for making of multilayer film reflector plate according to claim 25 is characterized in that, said altogether extrusion technique comprises the step that the mould that utilizes said extruder altogether or roller extrude, and forms surface structure on the surface of said substrate material.

28. the method for making of multilayer film reflector plate according to claim 16 is characterized in that, comprises the material of form dielectric grid material layer in the said charging.

29. the method for making of multilayer film reflector plate according to claim 28; It is characterized in that; The material drawn technology of said birefringent material layer is carried out single shaft or biaxial stretch-formed to the material of said birefringent material layer, forms the birefringent material layer in the said multilayer film reflector plate.

30. the method for making of multilayer film reflector plate according to claim 29 is characterized in that, said birefringent material layer has the characteristic of X on the plane, Y both direction different refractivity.

31. the method for making of a multilayer film reflector plate is characterized in that, said method comprises:

Charging multi-layer film material, said multi-layer film material comprise layer high molecule polymeric material, one or more layers functional film material of said multilayer film reflector plate;

Utilize to be total to the charging that extruder receives said multi-layer film material, implement extrusion technique altogether, comprising:

Cleaning and dry said multi-layer film material;

The said multi-layer film material of heating and mixing charging forms multipolymer;

Filter the impurity of said multipolymer;

Control the discharge-amount of said multipolymer;

Control the thickness and the size of said multipolymer;

Extrude said multipolymer;

Base material is fitted in the surface of said multipolymer, form said multilayer film reflector plate.

32. the method for making of multilayer film reflector plate according to claim 31 is characterized in that, said multi-layer film material also comprises one or more layers protective layer material.

33. the method for making of multilayer film reflector plate according to claim 32 is characterized in that, said protective layer material is the macromolecule polymer material with filtering ultraviolet effect.

34. the method for making of multilayer film reflector plate according to claim 31 is characterized in that, combines said base material and said multipolymer with in-mold forming process.

35. the method for making of multilayer film reflector plate according to claim 31 is characterized in that, the said multilayer film reflector plate of formation is incorporated into mirror holder after cutting.

36. the method for making of multilayer film reflector plate according to claim 31 is characterized in that, said functional film material is the macromolecule polymer material with ultraviolet light, scratch resistant and high reflecting effect.

37. the method for making of multilayer film reflector plate according to claim 36 is characterized in that, the surface of said functional membrane is coated with highly reflecting films.

38. the method for making of multilayer film reflector plate according to claim 36 is characterized in that, the surface coated dyestuff of said functional membrane.

39. the method for making of multilayer film reflector plate according to claim 36 is characterized in that, the material of said functional membrane is mixing to have particle.

40. the method for making according to the described multilayer film reflector plate of claim 39 is characterized in that, but said particle is the metal oxide materials of reflected infrared.

41. the method for making of multilayer film reflector plate according to claim 31 is characterized in that, is added with particle in the said substrate material.

42. the method for making of multilayer film reflector plate according to claim 31 is characterized in that, said base material forms surface structure in the surface in the step of utilizing mould or roller to extrude.

43. the method for making of multilayer film reflector plate according to claim 31 is characterized in that, comprises the material of form dielectric grid material layer in the said charging.

44. method for making according to the described multilayer film reflector plate of claim 43; It is characterized in that; The material drawn technology of said birefringent material layer is carried out single shaft or biaxial stretch-formed to the material of said birefringent material layer, forms the birefringent material layer in the said multilayer film reflector plate.

45. the method for making according to the described multilayer film reflector plate of claim 44 is characterized in that, said birefringent material layer has the characteristic of X on the plane, Y both direction different refractivity.

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