Thermoplastic transparent glass fiber composite material whose refractive index is adjusted according to the content ratio of thermoplastic resin and its manufacturing method

Abstract

The present invention relates to a thermoplastic transparent glass fiber composite in which the refractive index is controlled according to the content ratio of the thermoplastic resin, and a method for manufacturing the same. More specifically, the invention relates to a thermoplastic transparent glass fiber composite in which thermoplastic resins having different refractive indices are mixed to match the refractive index of the resin to be the same or similar to the refractive index of the glass fiber, and a method for manufacturing the same.

Description

Technology Field

[0001] The present invention relates to a thermoplastic transparent glass fiber composite in which the refractive index is controlled according to the content ratio of the thermoplastic resin, and a method for manufacturing the same. More specifically, the invention relates to a thermoplastic transparent glass fiber composite in which thermoplastic resins having different refractive indices are mixed to match the refractive index of the resin to be the same or similar to the refractive index of the glass fiber, and a method for manufacturing the same. Background Technology

[0002] Glass fiber is a fiber-shaped material derived from glass that is widely used in various industrial fields due to its excellent physical and mechanical properties. In particular, based on these characteristics, glass fiber is formed into composites with various matrix materials to overcome the limitations of the fiber form and is being provided for diverse applications as a material with outstanding properties.

[0003] Thermoplastic resins are materials that exhibit changes in plasticity in response to changes in thermal conditions. They are relatively easy to mold due to their flexibility at specific temperatures, and are utilized in applications requiring various shapes because they maintain a fixed form and high mechanical strength when cooled below the temperature at which plasticity is exhibited. A representative example is glass fiber reinforced plastic, which consists of a plastic matrix mixed with glass fibers of a specific length; this composition allows for excellent resistance to external forces while achieving lightweight properties.

[0004] Generally, glass-based materials are transparent and suitable for various applications, but they have the disadvantages of being brittle and relatively heavy. Therefore, transparent materials based on thermoplastic resins, which possess sufficient light transmittance while being lightweight and elastic, are widely used. Although such transparent thermoplastic resins are widely used for various industrial and everyday applications based on their inherent properties, continuous improvement is required as they have properties that are inferior to those of glass-based materials.

[0005] Meanwhile, glass fiber reinforced composites having a transparent thermoplastic resin as a matrix are optically translucent or substantially opaque due to problems such as chromatic aberration and haze caused by light scattering and dispersion at the interface formed between the matrix and the glass fibers, resulting from the mismatch in refractive indices between the glass fibers included in the composite and the transparent thermoplastic resin matrix.

[0006] Therefore, if the refractive indices of the glass fibers included in the composite and the transparent thermoplastic resin serving as the matrix are controlled to be the same or similar, there is an urgent need for a composite material that ensures transparency while simultaneously improving other physical properties by including glass fibers through the minimization of light scattering at the interface, as well as a manufacturing method capable of providing such a composite material.

[0007] Reference 1 (Korean Registered Patent Publication No. 10-2100677) relates to a transparent composite material and a method for manufacturing the same, and discloses a step of forming a resin composition by mixing a polycarbonate resin and a polyester resin having different refractive indices; a step of impregnating the resin composition with reinforcing fibers (glass fibers); and a step of forming a transparent composite material by pressing the glass fibers impregnated in the resin composition with a hot press, but does not specifically disclose the thermoplastic transparent glass fiber composite material and the method for manufacturing the same according to the present invention.

[0008] Reference 2 (Korean Published Patent Application No. 10-2016-0043610) relates to a thermoplastic resin composition having excellent transparency and mechanical strength and a molded article including the same, and more specifically, discloses a thermoplastic resin composition having excellent transparency and mechanical strength and a molded article including the same, comprising a polycarbonate resin; a (meth)acrylic resin; an aromatic phosphate ester compound; and a glass fiber, wherein the difference in refractive index between the resin mixture comprising the polycarbonate resin, the (meth)acrylic resin, and the aromatic phosphate ester compound and the glass fiber is 0.02 or less, but does not specifically disclose a thermoplastic transparent glass fiber composite according to the present invention and a method for manufacturing the same.

[0009] Reference 3 (Korean Patent Publication No. 10-2023-0108733) relates to a glass composition for glass fibers, glass fibers, and glass fiber reinforced resin molded articles. Specifically, it discloses a glass composition for glass fibers, glass fibers, and glass fiber reinforced resin molded articles comprising SiO2, Al2O3, CaO, TiO2, P2O5, ZnO, SO3, Na2O, K2O, and Li2O as a glass composition for glass fibers, but does not specifically disclose a thermoplastic transparent glass fiber composite material according to the present invention and a method for manufacturing the same. Prior art literature

[0010] Cited Reference 1: Korean Registered Patent Publication No. 10-2100677 (Published April 14, 2020) Cited Reference 2: Korean Published Patent Publication No. 10-2016-0043610 (Published April 22, 2016) Cited Reference 3: Korean Published Patent Publication No. 10-2023-0108733 (Published July 18, 2023) The problem to be solved

[0011] The problem to be solved by the present disclosure is to provide a thermoplastic transparent glass fiber composite having excellent transparency and physical properties, and a method for manufacturing the same.

[0012] Another problem to be solved by the present disclosure is to provide a thermoplastic transparent glass fiber composite material and a method for manufacturing the same, wherein thermoplastic resins having different refractive indices are mixed to match the refractive index of the resin to be the same or similar to the refractive index of the glass fiber.

[0013] Another problem to be solved by the present disclosure is to provide a thermoplastic transparent glass fiber composite in which the refractive index is controlled according to the content ratio of the thermoplastic resin, and a method for manufacturing the same, thereby providing a method for manufacturing a thermoplastic transparent glass fiber composite that is simple yet has high transmittance.

[0014] The problems to be solved in this disclosure are not limited to those mentioned above, and may include all various problems that can be obviously achieved from this disclosure. means of solving the problem

[0015] The thermoplastic transparent glass fiber composite according to the present disclosure provided to achieve the aforementioned technical problem may be a thermoplastic transparent glass fiber composite comprising a first thermoplastic resin and a second thermoplastic resin having different refractive indices, and glass fibers.

[0016] In addition, the method for manufacturing a thermoplastic transparent glass fiber composite according to the present disclosure, provided to achieve the aforementioned technical problem, is:

[0017] A first step of preparing a thermoplastic resin composition by mixing a first thermoplastic resin and a second thermoplastic resin having different refractive indices using a heating mixer;

[0018] A second step of preparing a first precursor composition by impregnating the above thermoplastic resin composition with glass fibers;

[0019] The method may include a third step of manufacturing a thermoplastic transparent glass fiber composite by pressing the first precursor composition with a hot press.

[0020] For example, the first thermoplastic resin and the second thermoplastic resin may each be a thermoplastic resin independently selected from the group comprising polycarbonate, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, cycloolefin copolymer, vinyl chloride, and methacrylate resin.

[0021] For example, the glass fiber may be included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition.

[0022] For example, the refractive index of the glass fiber may be 1.4 to 2.0.

[0023] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber.

[0024] For example, the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber.

[0025] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber, and the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber.

[0026] For example, the first thermoplastic resin and the second thermoplastic resin may be mixed in a ratio of 9:1 to 1:9 based on their respective weights.

[0027] In addition, the thermoplastic transparent glass fiber composite according to the present disclosure provided to achieve the aforementioned technical problem may be a thermoplastic transparent glass fiber composite comprising a first thermoplastic resin and a second thermoplastic resin having different refractive indices, glass beads, zinc borate powder, and glass fibers.

[0028] In addition, the method for manufacturing a thermoplastic transparent glass fiber composite according to the present disclosure, provided to achieve the aforementioned technical problem, is:

[0029] A first step of preparing a thermoplastic resin composition by mixing a first thermoplastic resin and a second thermoplastic resin having different refractive indices using a heating mixer;

[0030] A second step of preparing a first precursor composition by mixing glass beads and zinc borate powder into the above thermoplastic resin composition;

[0031] A third step of preparing a second precursor composition by impregnating the first precursor composition with glass fibers;

[0032] The method may include a fourth step of manufacturing a thermoplastic transparent glass fiber composite by pressing the second precursor composition with a hot press.

[0033] For example, the first thermoplastic resin and the second thermoplastic resin may each be a thermoplastic resin independently selected from the group comprising polycarbonate, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, cycloolefin copolymer, vinyl chloride, and methacrylate resin.

[0034] For example, the glass beads may be included in an amount of 3 to 7 parts by weight based on 100 parts by weight of the thermoplastic resin composition.

[0035] For example, the zinc borate powder may be included in an amount of 1 to 3 parts by weight based on 100 parts by weight of the thermoplastic resin composition.

[0036] For example, the glass fiber may be included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition.

[0037] For example, the refractive index of the glass fiber may be 1.4 to 2.0.

[0038] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber.

[0039] For example, the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber.

[0040] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber, and the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber.

[0041] For example, the first thermoplastic resin and the second thermoplastic resin may be mixed in a ratio of 9:1 to 1:9 based on their respective weights. Effects of the invention

[0042] According to the present disclosure, a thermoplastic transparent glass fiber composite having excellent transparency and physical properties and a method for manufacturing the same can be provided.

[0043] In addition, according to the present disclosure, a thermoplastic transparent glass fiber composite and a method for manufacturing the same can be provided by mixing thermoplastic resins having different refractive indices to match the refractive index of the resin to be the same or similar to the refractive index of the glass fiber.

[0044] In addition, according to the present disclosure, a thermoplastic transparent glass fiber composite material in which the refractive index is controlled according to the content ratio of the thermoplastic resin and a method for manufacturing the same are provided, thereby providing a method for manufacturing a thermoplastic transparent glass fiber composite material that is simple yet has high transmittance.

[0045] The superior and / or useful effects according to the present disclosure are not limited to the effects of the present disclosure described above, and a person skilled in the art will also be able to obviously recognize, based on the disclosure of the present specification, superior and / or useful effects of the present disclosure that are not explicitly disclosed in the present specification, and it should be understood that these are intentionally disclosed by the present specification and are obviously included within the scope of the present disclosure. Brief explanation of the drawing

[0046] FIG. 1 is a schematic diagram illustrating the process of manufacturing a thermoplastic transparent glass fiber composite according to the present disclosure. FIG. 2 is a schematic diagram illustrating the process of manufacturing a thermoplastic transparent glass fiber composite according to the present disclosure. Specific details for implementing the invention

[0047] The present disclosure will be described in detail below.

[0048] The terms or words used in this specification and claims are not intended to be interpreted as being limited to their commonly accepted dictionary meanings, and a person of ordinary knowledge in the art to which this disclosure pertains will clearly understand that said terms or words are used in the sense of conveying what this disclosure means within the scope of expressing the concept that this specification and claims obviously intend to convey.

[0049] Furthermore, a person skilled in the art will clearly understand that the embodiments and configurations described in this specification are merely preferred embodiments presented as examples to enable a person skilled in the art to understand and reproduce the present disclosure, and are not intended to limit the present disclosure thereto.

[0050] Furthermore, the descriptions and specific embodiments regarding each configuration described in this specification may be obviously applicable to each other descriptions and embodiments. That is, a person skilled in the art will clearly understand that all combinations of the various configurations and specific embodiments disclosed in this specification fall within the scope disclosed herein.

[0051] As used herein, the term 'and / or' is a term comprising each of the mentioned items and all combinations of one or more. Additionally, the singular form includes the plural form unless otherwise noted.

[0052] As used herein, the terms 'comprising' and / or 'comprising' do not exclude the existence or addition of items other than those mentioned.

[0053] In this specification, a numerical range indicated by the term 'to' represents a numerical range that includes the values ​​listed before and after the term as a lower limit and an upper limit, respectively. Where multiple numerical values ​​are disclosed as the upper and lower limits of an arbitrary numerical range, the numerical range disclosed in this specification may be understood as an arbitrary numerical range in which any one of the multiple lower limits and any one of the multiple upper limits are set as the lower limit and upper limit, respectively.

[0054] The terms ‘about’ or ‘approximately’ used in this specification, when used, mean a value or numerical range within 10% of the value or numerical range listed after the said term.

[0055] Terms or words used in this specification and claims should not be interpreted as being limited to their ordinary dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of this disclosure, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Accordingly, the configurations described in the embodiments of this specification are merely one preferred embodiment of this disclosure and do not represent all of the technical spirit of this disclosure; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0056] Meanwhile, each description and embodiment disclosed in this specification may also be applied to other descriptions and embodiments. That is, all combinations of the various elements disclosed in this specification fall within the scope of this disclosure, and descriptions omitted in one embodiment may be interpreted in the same manner as described in other embodiments. Furthermore, the scope of this disclosure should not be considered limited by the specific descriptions provided below.

[0057] According to one embodiment of the present disclosure, a thermoplastic transparent glass fiber composite may be provided, comprising a first thermoplastic resin and a second thermoplastic resin having different refractive indices, and a glass fiber.

[0058] According to another embodiment of the present disclosure, a method for manufacturing a thermoplastic transparent glass fiber composite can be provided.

[0059] For example, a method for manufacturing the above-mentioned thermoplastic transparent glass fiber composite is,

[0060] A first step of preparing a thermoplastic resin composition by mixing a first thermoplastic resin and a second thermoplastic resin having different refractive indices using a heating mixer;

[0061] A second step of preparing a first precursor composition by impregnating the above thermoplastic resin composition with glass fibers;

[0062] The method may include a third step of manufacturing a thermoplastic transparent glass fiber composite by pressing the first precursor composition with a hot press.

[0063] For example, the first thermoplastic resin and the second thermoplastic resin may each be a thermoplastic resin selected independently from the group comprising polycarbonate, polyethylene terephthalate, polycyclohexylenedimethylene terephthalate, cycloolefin copolymer, vinyl chloride, and methacrylate resin. The first thermoplastic resin and the second thermoplastic resin are resin component materials having excellent transparency and thermoplasticity, and when a composite material is formed together with glass fibers, the composite material may have excellent light transmittance and, at the same time, be well mixed with glass fibers to have physical properties such as excellent mechanical properties.

[0064] For example, the glass fiber may be included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition. If the glass fiber is included in an amount of less than 10 parts by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the physical properties of the final obtained thermoplastic transparent glass fiber composite are not sufficiently improved. If the glass fiber is included in an amount of more than 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the transparency of the final obtained thermoplastic transparent glass fiber composite is reduced even if the refractive indices of the glass fiber and the matrix material included in the composite are similar or identical. Therefore, it is desirable for the content of the glass fiber to satisfy the above numerical range.

[0065] For example, the refractive index of the glass fiber may be 1.4 to 2.0, and preferably 1.5 to 1.8.

[0066] For example, the glass fiber may have a diameter of 3 to 20 μm.

[0067] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber, and the refractive index of the first thermoplastic resin may preferably have a value of 101 to 150% based on the refractive index of the glass fiber, and more preferably may have a value of 101 to 120% based on the refractive index of the glass fiber.

[0068] For example, the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber, and the refractive index of the second thermoplastic resin may preferably have a value of 50 to 99% based on the refractive index of the glass fiber, and more preferably may have a value of 80 to 99% based on the refractive index of the glass fiber.

[0069] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber, and the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber.

[0070] For example, the first thermoplastic resin and the second thermoplastic resin may be mixed in a ratio of 9:1 to 1:9 based on their respective weights. By adjusting the weight ratio of the first thermoplastic resin and the second thermoplastic resin, the average refractive index of the final obtained thermoplastic transparent glass fiber composite can be adjusted to be the same or similar to the refractive index of the glass fiber, despite the difference between the refractive indices of the first thermoplastic resin and the second thermoplastic resin and the refractive index of the glass fiber.

[0071] According to another embodiment of the present disclosure, a thermoplastic transparent glass fiber composite may be provided comprising a first thermoplastic resin and a second thermoplastic resin having different refractive indices, glass beads, zinc borate powder, and glass fibers.

[0072] According to another embodiment of the present disclosure, a method for manufacturing a thermoplastic transparent glass fiber composite,

[0073] A first step of preparing a thermoplastic resin composition by mixing a first thermoplastic resin and a second thermoplastic resin having different refractive indices using a heating mixer;

[0074] A second step of preparing a first precursor composition by mixing glass beads and zinc borate powder into the above thermoplastic resin composition;

[0075] A third step of preparing a second precursor composition by impregnating the first precursor composition with glass fibers;

[0076] A method comprising a fourth step of manufacturing a thermoplastic transparent glass fiber composite by pressing the second precursor composition with a hot press may be provided.

[0077] For example, the first thermoplastic resin and the second thermoplastic resin may each be a thermoplastic resin independently selected from the group comprising polycarbonate, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, cycloolefin copolymer, vinyl chloride, and methacrylate resin.

[0078] For example, the glass beads may be included in an amount of 3 to 7 parts by weight based on 100 parts by weight of the thermoplastic resin composition. The glass beads are spherical glass materials, and when included in the thermoplastic transparent glass fiber composite according to the present disclosure, they can enhance the mechanical properties of the composite while also enhancing the lightweight properties of the composite. If the glass beads are included in an amount of less than 3 parts by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the properties of the final obtained thermoplastic transparent glass fiber composite are not sufficiently improved. If the glass beads are included in an amount of more than 7 parts by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the transparency of the final obtained thermoplastic transparent glass fiber composite is reduced. Therefore, it is desirable for the content of the glass beads to satisfy the above numerical range.

[0079] For example, the zinc borate powder may be included in an amount of 1 to 3 parts by weight based on 100 parts by weight of the thermoplastic resin composition. When the zinc borate powder is included in the thermoplastic transparent glass fiber composite according to the present disclosure, it can impart fire resistance to the composite while maintaining the transparency of the composite. If the zinc borate powder is included in an amount of less than 1 part by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the fire resistance of the finally obtained thermoplastic transparent glass fiber composite is not sufficiently improved, and if the zinc borate powder is included in an amount of more than 3 parts by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the transparency of the finally obtained thermoplastic transparent glass fiber composite is reduced, so it is desirable for the content of the zinc borate powder to satisfy the above numerical range.

[0080] For example, the glass fiber may be included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition. If the glass fiber is included in an amount of less than 10 parts by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the physical properties of the final obtained thermoplastic transparent glass fiber composite are not sufficiently improved. If the glass fiber is included in an amount of more than 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition, there is a problem that the transparency of the final obtained thermoplastic transparent glass fiber composite is reduced even if the refractive indices of the glass fiber and the matrix material included in the composite are similar or identical. Therefore, it is desirable for the content of the glass fiber to satisfy the above numerical range.

[0081] For example, the refractive index of the glass fiber may be 1.4 to 2.0, and preferably 1.5 to 1.8.

[0082] For example, the glass fiber may have a diameter of 3 to 20 μm.

[0083] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber, and the refractive index of the first thermoplastic resin may preferably have a value of 101 to 150% based on the refractive index of the glass fiber, and more preferably may have a value of 101 to 120% based on the refractive index of the glass fiber.

[0084] For example, the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber, and the refractive index of the second thermoplastic resin may preferably have a value of 50 to 99% based on the refractive index of the glass fiber, and more preferably may have a value of 80 to 99% based on the refractive index of the glass fiber.

[0085] For example, the refractive index of the first thermoplastic resin may have a value greater than the refractive index of the glass fiber, and the refractive index of the second thermoplastic resin may have a value smaller than the refractive index of the glass fiber.

[0086] For example, the first thermoplastic resin and the second thermoplastic resin may be mixed in a ratio of 9:1 to 1:9 based on their respective weights. By adjusting the weight ratio of the first thermoplastic resin and the second thermoplastic resin, the average refractive index of the final obtained thermoplastic transparent glass fiber composite can be adjusted to be the same or similar to the refractive index of the glass fiber, despite the difference between the refractive indices of the first thermoplastic resin and the second thermoplastic resin and the refractive index of the glass fiber.

[0087] One or more examples of the present disclosure are described in more detail below through embodiments. However, these embodiments are intended to illustrate one or more examples, and the scope of the present disclosure is not limited to these embodiments.

[0088] Preparation Example: Preparation of components for forming a thermoplastic transparent glass fiber composite according to the present disclosure

[0089] Glass fibers were prepared with a 95% average diameter of 13.5 μm (Owens Corning), glass beads were prepared as Glass Bubbles iM30K (3M), and zinc borate powder was prepared as Cas no 138265-88-0 (Shinseung Highchem). As thermoplastic resins, TP1 and TP2 were commercially obtained from polycarbonate (Lotte Chemical) and cycloolefin copolymer (Mitsui Chemicals), respectively. All components were used without any additional processing.

[0090] Examples 1 to 5: Preparation of thermoplastic transparent glass fiber composites according to the present disclosure

[0091] 200g each of thermoplastic resin compositions containing the first thermoplastic resin and the second thermoplastic resin in weight ratios of 10:0, 5:5, 3:7, 1:9, and 0:10, respectively, were added in pellet form and mixed with a heating mixer at 80 RPM and 260°C for 30 minutes to obtain the composition. Subsequently, 20g of glass fiber was impregnated into each thermoplastic resin composition to prepare the first precursor composition. Then, the first precursor composition was placed in a mold with a width, length, and height of 5cm, 5cm, and 5mm, respectively, and molded and cured using a hot press at 260°C under a pressure of 12 bar to produce a thermoplastic transparent glass fiber composite. Each of the five thermoplastic transparent glass fiber composites with different weight ratios of the first thermoplastic resin and the second thermoplastic resin was prepared as the composites of Examples 1 to 5.

[0092] Example 6: Preparation of a thermoplastic transparent glass fiber composite according to the present disclosure

[0093] Example 6 composite material was prepared through the same process as in Examples 1 to 5 above, except that 200g of a thermoplastic resin composition containing a first thermoplastic resin and a second thermoplastic resin in a 5:5 ratio based on their respective weights was used, 10g of glass beads and 2g of zinc borate powder were added and mixed to obtain a first precursor composition, and 20g of glass fiber was added to it.

[0094] Experimental Example: Evaluation of light transmittance of a thermoplastic transparent glass fiber composite according to the present disclosure

[0095] The light transmittance of the composites of Examples 1 to 6 was measured for light having different wavelengths (656.3 nm, 589.3 nm, and 486.1 nm). The results are shown in Table 1 below.

[0096] Examples Refractive index 656.3 nm 589.3 nm 486.1 nm fiberglass 1.55664 1.55945 1.56590 Example 1 (TP1:TP2=10:0) 1.58050 1.58613 1.59967 Example 2 (TP1:TP2=5:5) 1.55386 1.55838 1.56950 Example 3 (TP1:TP2=3:7) 1.54617 1.55014 1.55994 Example 4 (TP1:TP2=1:9) 1.54348 1.54896 1.55438 Example 5 (TP1:TP2=0:10) 1.54205 1.54492 1.55188 Example 6 (TP1:TP2=5:5) 1.54519 1.55127 1.56013

[0097] Referring to Table 1 above, it can be seen that the composites of Examples 1 to 6 according to the present disclosure have excellent light transmittance for light of various wavelengths, and in particular, have similar light transmittance when compared to that of glass fiber. Furthermore, it can be seen that the composite of Example 6 according to the present disclosure has excellent light transmittance while having a relatively lower density compared to the composite of Example 2. Although the embodiments of the present disclosure have been illustrated and described above, those skilled in the art will understand that various modifications in form and details may be made without departing from the spirit and scope of the embodiments as defined by the appended claims and equivalents.

Claims

Claim 1 A thermoplastic transparent glass fiber composite comprising a first thermoplastic resin and a second thermoplastic resin having different refractive indices, and a glass fiber, wherein the first thermoplastic resin is polycarbonate (PC), the second thermoplastic resin is selected from the group comprising cycloolefin copolymer (COC), polyethylene terephthalate, and polycyclohexylenedimethylene terephthalate, and a thermoplastic resin composition which is a mixture of the first thermoplastic resin and the second thermoplastic resin, wherein the refractive index of the glass fiber is 1.4 to 2.0, the refractive index of the first thermoplastic resin has a value greater than the refractive index of the glass fiber, and the refractive index of the second thermoplastic resin has a value smaller than the refractive index of the glass fiber, and the first thermoplastic resin and the second thermoplastic resin are mixed in a ratio of 9:1 to 1:9 based on their respective weights. Claim 2 A method for manufacturing a thermoplastic transparent glass fiber composite according to claim 1, comprising: a first step of mixing a first thermoplastic resin and a second thermoplastic resin having different refractive indices using a heating mixer to produce a thermoplastic resin composition; a second step of impregnating the thermoplastic resin composition with glass fibers to produce a first precursor composition; and a third step of pressing the first precursor composition with a hot press to produce a thermoplastic transparent glass fiber composite. Claim 3 delete Claim 4 A method for manufacturing a thermoplastic transparent glass fiber composite, wherein, in paragraph 2, the glass fiber is included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition. Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 A thermoplastic transparent glass fiber composite comprises a first thermoplastic resin and a second thermoplastic resin having different refractive indices, glass beads, zinc borate powder, and glass fibers, wherein the first thermoplastic resin is polycarbonate (PC), the second thermoplastic resin is selected from the group comprising cycloolefin copolymer (COC), polyethylene terephthalate, and polycyclohexylenedimethylene terephthalate, and comprises a thermoplastic resin composition which is a mixture of the first thermoplastic resin and the second thermoplastic resin, wherein the glass beads are included in an amount of 3 to 7 parts by weight based on 100 parts by weight of the thermoplastic resin composition, and the zinc borate powder is included in an amount of 1 to 3 parts by weight based on 100 parts by weight of the thermoplastic resin composition, the refractive index of the glass fibers is 1.4 to 2.0, and the refractive index of the first thermoplastic resin has a value greater than the refractive index of the glass fibers. A thermoplastic transparent glass fiber composite material characterized in that the refractive index of the second thermoplastic resin has a value smaller than the refractive index of the glass fiber, and the first thermoplastic resin and the second thermoplastic resin are mixed in a ratio of 9:1 to 1:9 based on their respective weights. Claim 10 A method for manufacturing a thermoplastic transparent glass fiber composite according to claim 9, comprising: a first step of preparing a thermoplastic resin composition by mixing a first thermoplastic resin and a second thermoplastic resin having different refractive indices using a heating mixer; a second step of preparing a first precursor composition by mixing glass beads and zinc borate powder with the thermoplastic resin composition; a third step of preparing a second precursor composition by impregnating glass fibers into the first precursor composition; and a fourth step of preparing a thermoplastic transparent glass fiber composite by pressing the second precursor composition with a hot press. Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 A method for manufacturing a thermoplastic transparent glass fiber composite, characterized in that, in claim 10, the glass fiber is included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the thermoplastic resin composition. Claim 15 delete Claim 16 delete Claim 17 delete Claim 18 delete

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