Composite transparent plate, and method of manufacturing the same

Abstract

To provide a composite transparent plate and a method of manufacturing the same.SOLUTION: A method of manufacturing a composite transparent plate includes a supplying step and a forming step. In the supplying step, a first resin, a second resin, and a third resin are introduced into a first extruder, a second extruder, and a third extruder, respectively, to form a composite transparent film including a corresponding first layer, second layer and third layer. The first resin is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G, and SKYGREEN(R) S2008. In the forming step, the composite transparent film is passed through a first forming wheel, a second forming wheel, and a third forming wheel in this order to form the composite transparent plate. The composite transparent plate has a haze value of 0.75% to 4%, and a light transmittance of 86% to 91.5%.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a composite transparent plate and a manufacturing method thereof, and more particularly to a PET composite transparent plate and a manufacturing method thereof. [Background technology]

[0002] Traditional PET transparent sheets are often made from a single raw material, which means that different layers of the transparent sheet cannot be optimized, and traditional transparent sheets tend to suffer from crystalline whitening during molding. Summary of the Invention [Problem to be solved by the invention]

[0003] The technical problem to be solved by the present invention is to provide a composite transparent plate and a manufacturing method thereof that overcomes the shortcomings of the prior art and solves the problem of crystal whitening occurring easily during molding. [Means for solving the problem]

[0004] In order to solve the above technical problems, one of the technical means adopted in the present invention provides a method for manufacturing a composite transparent plate. The method for producing a composite transparent plate includes: a supplying step of feeding a first resin, a second resin, and a third resin into a first extruder, a second extruder, and a third extruder, respectively, to form a composite transparent film including a corresponding first layer, a second layer, and a third layer; and a molding step of passing the composite transparent film through a first molding wheel, a second molding wheel, and a third molding wheel in sequence to form a composite transparent plate, wherein the first resin is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G, and SKYGREEN® S2008, the second resin is selected from the group consisting of Tairilin 3760 and Tairilin 3842, and the third resin is selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R, and Tairilin 384R, an absolute value of the difference between the temperature of the first forming wheel and the temperature of the second forming wheel is 5°C or less, a ratio of the temperature of the third forming wheel to the temperature of the first forming wheel or the temperature of the second forming wheel (temperature of the third forming wheel / first forming wheel, or temperature of the third forming wheel / second forming wheel) is 1.8 to 3.5, and the composite transparent plate has a haze value of 0.75% to 4% and a light transmittance of 86% to 91.5%.

[0005] Preferably, the intrinsic viscosity of the first resin is 0.63 dl / g to 1.1 dl / g, the intrinsic viscosity of the second resin is 0.76 dl / g to 1.1 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 1.1 dl / g.

[0006] Preferably, the first forming wheel has a temperature of 18°C ​​to 25°C, the second forming wheel has a temperature of 18°C ​​to 25°C, and the third forming wheel has a temperature of 35°C to 58°C.

[0007] Preferably, the first layer, the second layer, and the third layer in the composite transparent plate are arranged as follows: third layer / second layer / first layer / second layer / third layer, third layer / second layer / first layer / second layer, third layer / second layer / first layer / third layer, or third layer / second layer / first layer.

[0008] Preferably, the thickness of the first layer occupies 40% to 70%, the thickness of the second layer occupies 15% to 40%, and the thickness of the third layer occupies 10% to 20%, of the thickness of the composite transparent plate being 100%.

[0009] Preferably, the composite transparent plate has a thickness of 0.5 mm to 8 mm.

[0010] In order to solve the above technical problems, another technical means adopted by the present invention provides a composite transparent plate, which includes a first layer formed of a first resin, a second layer formed of a second resin, and a third layer formed of a third resin, the first resin being selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G and SKYGREEN (registered trademark) S2008, the second resin being selected from the group consisting of Tairilin 3760 and Tairilin 3842, the third resin being selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R and Tairilin 384R, and the composite transparent plate has a haze value of 0.75% to 4% and a light transmittance of 86% to 91.5%.

[0011] Preferably, the intrinsic viscosity of the first resin is 0.63 dl / g to 1.1 dl / g, the intrinsic viscosity of the second resin is 0.76 dl / g to 1.1 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 1.1 dl / g.

[0012] Preferably, the first layer, the second layer, and the third layer in the composite transparent plate are arranged as follows: third layer / second layer / first layer / second layer / third layer, third layer / second layer / first layer / second layer, third layer / second layer / first layer / third layer, or third layer / second layer / first layer.

[0013] Preferably, the thickness of the first layer occupies 40% to 70%, the thickness of the second layer occupies 15% to 40%, and the thickness of the third layer occupies 10% to 20%, of the thickness of the composite transparent plate being 100%. Effect of the Invention

[0014] As an advantageous effect of the present invention, the composite transparent plate and the manufacturing method thereof according to the present invention have the technical features that "the first resin is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G and SKYGREEN (registered trademark) S2008, the second resin is selected from the group consisting of Tairilin 3760 and Tairilin 3842, and the third resin is selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R and Tairilin 384R", thereby solving the problem that crystalline whitening is easily caused during molding of conventional transparent plates. [Brief description of the drawings]

[0015] [Figure 1] 2 is a flowchart of a method for manufacturing a composite transparent panel according to an embodiment of the present invention. [Diagram 2] 1 is a schematic diagram of a composite transparent plate according to one embodiment of the present invention. [Diagram 3] 1 is a schematic diagram of a composite transparent plate according to one embodiment of the present invention. [Figure 4] 1 is a schematic diagram of a composite transparent plate according to one embodiment of the present invention. [Diagram 5] 1 is a schematic diagram of a composite transparent plate according to one embodiment of the present invention. [Figure 6]1 is a schematic diagram of a composite transparent plate according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] In order to better understand the features and technical contents of the present invention, please refer to the following detailed description of the present invention and the accompanying drawings, which are provided for reference and explanation only and are not intended to limit the scope of the present invention.

[0017] Hereinafter, the embodiments of the "composite transparent plate and its manufacturing method" according to certain specific embodiments will be described, and those skilled in the art will be able to understand the advantages and effects of the present invention based on the contents disclosed in this specification. The present invention can be implemented or applied by other different specific embodiments, and various modifications and changes can be made to each detail in this specification based on different perspectives and applications without departing from the concept of the present invention. In addition, as described in advance, the accompanying drawings of the present invention are simple schematic illustrations and are not drawn based on actual size. The technical contents of the present invention will be described in more detail based on the following embodiments, but the disclosed contents do not limit the protection scope of the present invention.

[0018] It should be understood that, although the present specification may use the terms "first", "second", "third" and the like to describe various elements or signals, these elements or signals are not limited by these terms. These terms are mainly used to distinguish one element from another element or one signal from another signal. In addition, the term "or" used in the present specification may include any one or more combinations of the associated listed items according to actual circumstances.

[0019] [Manufacturing method of composite transparent board] 1, which is a flow chart of a method for manufacturing a composite transparent panel according to an embodiment of the present invention, the method for manufacturing a composite transparent panel includes a supplying step S110 and a molding step S120. The method for manufacturing a composite transparent panel may further include other steps as necessary, and the present invention is not limited thereto.

[0020] In the supplying step S110, a first resin, a second resin, and a third resin are respectively fed into a first extruder, a second extruder, and a third extruder to form a composite transparent film including a corresponding first layer A, a second layer B, and a third layer C. Specifically, the first resin, the second resin, and the third resin may be fed into the first extruder, the second extruder, and the third extruder in the form of pellets.

[0021] The first resin is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G, and SKYGREEN® S2008. The second resin is selected from the group consisting of Tairilin 3760 and Tairilin 3842. And the third resin is selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R, and Tairilin 384R.

[0022] The melting point (Tm) of Tairilin 3824 is 238°C, the melting point of Tairilin 3842 is 246°C, the melting point of Tairilin 390A is 228°C, the melting point of Tairilin P115 is 228°C, Tairilin 663G has no melting point, SK 2008 has no melting point, Tairilin 380R has a melting point of 248°C, and the melting point of Tairilin 384R is 248°C.

[0023] The first resin may have a melting point of 228° C. to 246° C. or may have no melting point. The second resin may have a melting point of 246° C. to 255° C. The third resin may have a melting point of 246° C. to 255° C.

[0024] The intrinsic viscosity of the first resin is 0.63 dl / g to 1.1 dl / g, the intrinsic viscosity of the second resin is 0.76 dl / g to 1.1 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 1.1 dl / g. Preferably, the intrinsic viscosity of the second resin is 0.76 dl / g to 0.84 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 0.84 dl / g.

[0025] In one embodiment, the first resin may be a copolyester formed by copolymerization of an alcohol selected from at least one of the group consisting of ethylene glycol, propylene glycol, and 1,4-cyclohexanedimethanol and an acid selected from at least one of the group consisting of isophthalic acid, terephthalic acid, and 2,6-naphthalenedicarboxylic acid. In one embodiment, the second resin and the third resin are polyethylene terephthalate or a modified polyester composition, although the present invention is not limited thereto.

[0026] The first resin contains a diol residue and a dicarboxylic acid residue. The total amount of the dicarboxylic acid residues is 100 mol%, and the content of the terephthalic acid residue is 70 mol% to 99 mol%, the content of the isophthalic acid residue is 1 mol% to 30 mol%, and the content of the 2,6-naphthalenedicarboxylic acid residue is 0 mol% to 30 mol%. The total amount of the diol residues is 100 mol%, and the content of the ethylene glycol residue is 50 mol% to 100 mol%, the content of the propylene glycol residue is 0 mol% to 50 mol%, and the content of the cyclohexanedimethanol residue is 0 mol% to 50 mol%. The isophthalic acid residues have an effect of suppressing crystallinity, and thus can impart a specific melting point temperature to the first resin.

[0027] In the forming step S120, the composite transparent film is passed through a first forming wheel, a second forming wheel, and a third forming wheel in this order to form a composite transparent plate 100.

[0028] The absolute value of the difference between the temperature of the first molding wheel and the temperature of the second molding wheel is 5°C or less, and the ratio of the temperature of the third molding wheel to the temperature of the first molding wheel or the second molding wheel is 1.8 to 3.5. In other words, the temperatures of the first molding wheel and the second molding wheel are close to each other, and the temperature of the first molding wheel may be higher than, the same as, or lower than the temperature of the second molding wheel. Preferably, the ratio of the temperature of the third molding wheel to the temperature of the first molding wheel or the second molding wheel is 1.8 to 3.5.

[0029] In this embodiment, the temperature of the first forming wheel is 18° C. to 25° C., the temperature of the second forming wheel is 18° C. to 25° C., and the temperature of the third forming wheel is 35° C. to 58° C. Preferably, the temperature of the first forming wheel is 18° C. to 20° C., the temperature of the second forming wheel is 18° C. to 22° C., and the temperature of the third forming wheel is 51° C. to 58° C. It is noteworthy that in the forming step S120 in this embodiment, the composite transparent film is cooled by the first forming wheel and the second forming wheel, and stress in the composite transparent film is eliminated when passing through the third forming wheel.

[0030] It is worth noting that the specific structures of the first extruder, the second extruder, the third extruder, the first forming wheel, the second forming wheel and the third forming wheel mentioned in the present invention can be changed as necessary or can be conventional devices.In addition, the specific structures of the first extruder, the second extruder, the third extruder, the first forming wheel, the second forming wheel and the third forming wheel are not limited as long as they can carry out the manufacturing method of the composite transparent plate.

[0031] As shown in Figs. 2 to 6, which are schematic diagrams of composite transparent plates according to different embodiments of the present invention, the composite transparent plate 100 may have a three-layer structure, a four-layer structure, or a five-layer structure. Specifically, the first layer, the second layer, and the third layer in the composite transparent plate are arranged in the order of third layer / second layer / first layer / second layer / third layer, third layer / second layer / first layer / second layer, third layer / second layer / first layer / third layer, or third layer / second layer / first layer. However, in other embodiments, the specific lamination method of the first layer, the second layer, and the third layer in the composite transparent plate may also be changed as necessary, and the present invention is not limited thereto.

[0032] With respect to thickness, assuming that the thickness of the composite transparent plate 100 is 100%, the thickness of the first layer A accounts for 40% to 70%, the thickness of the second layer B accounts for 15% to 40%, and the thickness of the third layer C accounts for 10% to 20%. The thickness of the composite transparent plate 100 is 0.5 mm to 8 mm, and preferably 2 mm to 8 mm.

[0033] It is noteworthy that the number of the second layer B and the third layer C may be one or two layers, and when the number of the second layer B and the third layer C is two layers, the thickness of the second layer B is the total thickness of the two second layers B, and the thickness of the third layer C is the total thickness of the two third layers C.

[0034] The composite transparent plate 100 has a haze value of 0.75% to 4% and a total light transmittance of 86% to 91.5%. It is worth noting that the light transmittance is measured according to the ISO 14782 method with light having a wavelength of 400 nm to 800 nm.

[0035] [Composite transparent plate] The embodiment of the present invention also provides a composite transparent plate 100. The composite transparent plate 100 may be manufactured by the composite transparent plate manufacturing method described above, but the present invention is not limited thereto.

[0036] The composite transparent plate 100 includes a first layer A, a second layer B, and a third layer C. The first layer A is made of a first resin, which is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G, and SKYGREEN® S2008. The second layer B is made of a second resin, which is selected from the group consisting of Tairilin 3760 and Tairilin 3842. The third layer C is made of a third resin, which is selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R, and Tairilin 384R. Preferably, when the materials of the first resins are different, the materials of the second resin and the third resin are the same.

[0037] The intrinsic viscosity of the first resin is 0.63 dl / g to 1.1 dl / g, the intrinsic viscosity of the second resin is 0.76 dl / g to 1.1 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 1.1 dl / g. Preferably, the intrinsic viscosity of the second resin is 0.76 dl / g to 0.84 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 0.84 dl / g.

[0038] In this embodiment, the composite transparent plate has a three-layer structure, a four-layer structure, or a five-layer structure. Specifically, the first layer, the second layer, and the third layer in the composite transparent plate are arranged as: third layer / second layer / first layer / second layer / third layer, third layer / second layer / first layer / second layer, third layer / second layer / first layer / third layer, or third layer / second layer / first layer.

[0039] With the thickness of the composite transparent plate 100 taken as 100%, the thickness of the first layer A occupies 40% to 70%, the thickness of the second layer B occupies 15% to 40%, and the thickness of the third layer C occupies 10% to 20%.

[0040] The composite transparent plate 100 has a haze value of 0.75% to 4% and a light transmittance of 86% to 91.5%.

[0041] [Measurement of experimental data] The present invention will be described in detail below with reference to Examples 1 to 6 and Comparative Examples 1 and 2. However, these Examples are provided for the purpose of understanding the present invention, and the present invention is not limited thereto.

[0042] Example 1: the first resin is Tairilin 3824, the second resin is Tairilin 3760, and the third resin is Tairilin 3760; the intrinsic viscosity of the first resin is 0.82 dl / g, the intrinsic viscosity of the second resin is 0.76 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g; the thickness of the first layer is 40%, the thickness of the second layer is 40%, and the thickness of the third layer is 20%; the temperature of the first forming wheel is 18°C, the temperature of the second forming wheel is 18°C, and the temperature of the third forming wheel is 51°C; the composite transparent board is 5 layers (as shown in FIG. 2), and is stacked as C / B / A / B / C (A is the first layer, B is the second layer, and C is the third layer).

[0043] Example 2: the first resin is Tairilin 3842, the second resin is Tairilin 3842, the third resin is Tairilin 3760, the intrinsic viscosity of the first resin is 0.84 dl / g, the intrinsic viscosity of the second resin is 0.84 dl / g, the intrinsic viscosity of the third resin is 0.76 dl / g, the first layer accounts for 70% of the thickness, the second layer accounts for 15% of the thickness, the third layer accounts for 15% of the thickness, the temperature of the first forming wheel is 20°C, the temperature of the second forming wheel is 20°C, the temperature of the third forming wheel is 58°C, the composite transparent board is 4 layers (as shown in Figure 3) and stacked as C / B / A / B.

[0044] Example 3: the first resin is Tairilin 390A, the second resin is Tairilin 3842, and the third resin is Tairilin 3842; the intrinsic viscosity of the first resin is 0.9 dl / g, the intrinsic viscosity of the second resin is 0.84 dl / g, and the intrinsic viscosity of the third resin is 0.84 dl / g; the thickness of the first layer is 60%, the thickness of the second layer is 30%, and the thickness of the third layer is 10%; the temperature of the first forming wheel is 18°C, the temperature of the second forming wheel is 18°C, and the temperature of the third forming wheel is 55°C; the composite transparent board is 4 layers (as shown in FIG. 4) and is stacked as C / B / A / C.

[0045] Example 4: the first resin is Tairilin P115, the second resin is Tairilin 3842, and the third resin is Tairilin 380R, the intrinsic viscosity of the first resin is 1.1 dl / g, the intrinsic viscosity of the second resin is 0.84 dl / g, and the intrinsic viscosity of the third resin is 0.8 dl / g, the first layer accounts for 60% of the thickness, the second layer accounts for 30% of the thickness, and the third layer accounts for 10% of the thickness, the temperature of the first forming wheel is 20°C, the temperature of the second forming wheel is 22°C, and the temperature of the third forming wheel is 55°C, and the composite transparent board is three-ply (as shown in FIG. 5) and stacked as C / B / A.

[0046] Example 5: the first resin is Tairilin 663G, the second resin is Tairilin 3842, the third resin is Tairilin 3842, the intrinsic viscosity of the first resin is 0.63 dl / g, the intrinsic viscosity of the second resin is 0.84 dl / g, the intrinsic viscosity of the third resin is 0.84 dl / g, the thickness of the first layer is 60%, the thickness of the second layer is 30%, the thickness of the third layer is 10%, the temperature of the first forming wheel is 20°C, the temperature of the second forming wheel is 20°C, the temperature of the third forming wheel is 53°C, the composite transparent board is 5 layers (as shown in Figure 6), and is stacked as C / B / A / B / C.

[0047] Example 6: the first resin is SKYGREEN® S2008, the second resin is Tairilin 3842, and the third resin is Tairilin 384R, the intrinsic viscosity of the first resin is 0.75 dl / g, the intrinsic viscosity of the second resin is 0.84 dl / g, and the intrinsic viscosity of the third resin is 0.84 dl / g, the thickness of the first layer is 60%, the thickness of the second layer is 30%, and the thickness of the third layer is 10%, the temperature of the first forming wheel is 20°C, the temperature of the second forming wheel is 20°C, and the temperature of the third forming wheel is 53°C, and the composite transparent board is 5 layers (as shown in FIG. 6 ) and stacked as C / B / A / B / C.

[0048] Comparative Example 1: the first resin was Tairilin 663G, no second resin and no third resin were used, the intrinsic viscosity of the first resin was 0.63 dl / g, the thickness of the first layer was 100%, the temperature of the first forming wheel was 20°C, the temperature of the second forming wheel was 20°C, and the temperature of the third forming wheel was 53°C.

[0049] Comparative Example 2: the first resin was Tailin 3760, no second resin and no third resin were used, the intrinsic viscosity of the first resin was 0.76 dl / g, the thickness of the first layer was 100%, the temperature of the first forming wheel was 18°C, the temperature of the second forming wheel was 18°C, and the temperature of the third forming wheel was 51°C.

[0050] The composition and parameters of each component of the composite transparent plates according to Examples 1 to 6 and Comparative Examples 1 and 2 are as shown in the following Table 1. The measurement methods thereof will be described later.

[0051] Haze value measurement: Measurement was performed based on the ISO 14782 method. The haze value was calculated based on the following formula. Haze value = Diffuse light transmittance / Total light transmittance x 100%

[0052] Light transmittance measurement: Measurement was performed based on the ISO 14782 method. The light transmittance Tt was calculated based on the following formula. Light transmittance Tt=(outgoing light / incoming light)×100%

[0053] [Table 1]

[0054] [Consideration of measurement results] According to Examples 1 to 6, with certain materials and parameters, the composite transparent plate exhibits good molding conditions, with a haze value of 0.75% to 2.85% and a light transmittance of 87.5% to 91.5%.

[0055] According to Example 5 and Comparative Example 1, the composite transparent plate in Comparative Example 1 includes only a single first layer, and the first resin component is Tairilin 663G, and the inherent viscosity of the resin is relatively low at 0.63 (dl / g), resulting in poor molding, and the resin dripping during molding, making it impossible to mold into a plate, or significant air bubbles being generated. Example 5 can be processed normally into a composite transparent plate because it is sandwiched between layers B and C of resins with high inherent viscosity.

[0056] According to Example 1 and Comparative Example 2, the composite transparent plate in Comparative Example 2 only includes one layer, and the first resin component is Tairilin 3760. When processed to a thickness of 4mm, crystalline whitening occurs, and the haze value of the composite transparent plate is too high and the light transmittance is too low, which does not meet the physical property requirements of the composite transparent plate. Example 1 is processed to a five-layer structure, the first resin component is Tairilin 3824, the second resin component is Tairilin 3760, and the third resin component is Tairilin 3760. When processed to a thickness of 6mm, crystalline whitening does not occur, and the haze value of the transparent composite plate is 2.85%, and the light transmittance is 88%, which meets the physical property requirements of the corresponding transparent composite plate.

[0057] [Advantageous Effects of the Embodiments] As an advantageous effect of the present invention, the composite transparent plate and the manufacturing method thereof according to the present invention have the technical features that "the first resin is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G and SKYGREEN (registered trademark) S2008, the second resin is selected from the group consisting of Tairilin 3760 and Tairilin 3842, and the third resin is selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R and Tairilin 384R", thereby solving the problem that crystalline whitening is easily caused during molding of conventional transparent plates.

[0058] The above disclosure is merely a preferred embodiment of the present invention, and the scope of the claims of the present invention is not limited thereto. Therefore, all equivalent technical modifications made by utilizing the contents of the specification and drawings of the present invention are included in the scope of the claims of the present invention. [Explanation of symbols]

[0059] 100...Composite transparent plate A...First layer B...Second layer C...Third layer S110...Supply process S120...molding process

Claims

1. a supplying step of feeding a first resin, a second resin, and a third resin into a first extruder, a second extruder, and a third extruder, respectively, to form a composite transparent film including corresponding first layers, second layers, and third layers; and a forming step of passing the composite transparent film through a first forming wheel, a second forming wheel, and a third forming wheel in sequence to form a composite transparent plate. the first resin is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G, and SKYGREEN® S2008; the second resin is selected from the group consisting of Tairilin 3760 and Tairilin 3842; the third resin is selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R and Tairilin 384R; an absolute value of a difference between a temperature of the first forming wheel and a temperature of the second forming wheel is 5° C. or less, and a ratio of a temperature of the third forming wheel to a temperature of the first forming wheel or a temperature of the second forming wheel (temperature of the third forming wheel / first forming wheel, or temperature of the third forming wheel / second forming wheel) is 1.8 to 3.5; The composite transparent plate has a haze value of 0.75% to 4% and a light transmittance of 86% to 91.5%.

2. The method for manufacturing a composite transparent plate according to claim 1, wherein the intrinsic viscosity of the first resin is 0.63 dl / g to 1.1 dl / g, the intrinsic viscosity of the second resin is 0.76 dl / g to 1.1 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 1.1 dl / g.

3. 2. The method for manufacturing a composite transparent plate according to claim 1, wherein the temperature of the first forming wheel is 18°C ​​to 25°C, the temperature of the second forming wheel is 18°C ​​to 25°C, and the temperature of the third forming wheel is 35°C to 58°C.

4. 2. The method for manufacturing a composite transparent plate according to claim 1, wherein the first layer, the second layer, and the third layer in the composite transparent plate are arranged as follows: third layer / second layer / first layer / second layer / third layer, third layer / second layer / first layer / second layer, third layer / second layer / first layer / third layer, or third layer / second layer / first layer.

5. The method for manufacturing a composite transparent plate according to claim 1, wherein the thickness of the composite transparent plate is 100%, and the thickness of the first layer is 40% to 70%, the thickness of the second layer is 15% to 40%, and the thickness of the third layer is 10% to 20%.

6. The first resin has a melting point of less than 246° C. or has no melting point; The melting point of the second resin is 246°C to 255°C, The method for manufacturing a composite transparent panel according to claim 1, wherein the melting point of the third resin is 246°C to 255°C.

7. The method for manufacturing a composite transparent plate according to claim 1, wherein the thickness of the composite transparent plate is 0.5 mm to 8 mm.

8. A composite transparent plate including a first layer formed of a first resin, a second layer formed of a second resin, and a third layer formed of a third resin, the first resin is selected from the group consisting of Tairilin 3824, Tairilin 3842, Tairilin 390A, Tairilin P115, Tairilin 663G, and SKYGREEN® S2008; the second resin is selected from the group consisting of Tairilin 3760 and Tairilin 3842; the third resin is selected from the group consisting of Tairilin 3760, Tairilin 3842, Tairilin 380R and Tairilin 384R; The composite transparent plate has a haze value of 0.75% to 4% and a light transmittance of 86% to 91.5%.

9. The composite transparent plate of claim 8, wherein the intrinsic viscosity of the first resin is 0.63 dl / g to 1.1 dl / g, the intrinsic viscosity of the second resin is 0.76 dl / g to 1.1 dl / g, and the intrinsic viscosity of the third resin is 0.76 dl / g to 1.1 dl / g.

10. 9. The composite transparent plate of claim 8, wherein the first layer, the second layer, and the third layer in the composite transparent plate are arranged as follows: third layer / second layer / first layer / second layer / third layer, third layer / second layer / first layer / second layer, third layer / second layer / first layer / third layer, or third layer / second layer / first layer.

11. The composite transparent plate of claim 8, wherein the thickness of the first layer accounts for 40% to 70%, the thickness of the second layer accounts for 15% to 40%, and the thickness of the third layer accounts for 10% to 20%, of the thickness of the composite transparent plate being 100%.

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