CN113733626A - Glass-like composite material and manufacturing process thereof - Google Patents
Glass-like composite material and manufacturing process thereof Download PDFInfo
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- CN113733626A CN113733626A CN202111043528.3A CN202111043528A CN113733626A CN 113733626 A CN113733626 A CN 113733626A CN 202111043528 A CN202111043528 A CN 202111043528A CN 113733626 A CN113733626 A CN 113733626A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/006—Producing casings, e.g. accumulator cases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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Abstract
The invention discloses a glass-like composite material and a manufacturing process thereof, belonging to the technical field of new materials. The manufacturing process comprises the following steps: s01, preparing a double-sided membrane with one side provided with PC and the other side provided with PMMA; s02, preparing an injection molding PC material; s03, placing the two double-sided diaphragms into a cavity in a manner that the PMMA faces outwards, adding injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression. The product of the glass-like composite material prepared by the method has excellent impact strength performance. The method of the invention utilizes the homogeneity of the bonding surface material to ensure that the bonding surface material is tightly fused and bonded without separation layer; the product is not deformed when being subjected to high temperature and high humidity by using the injection molding balance of the double-sided membrane; by utilizing the hardness foundation of the PMMA outer layer substrate, the hardness of the nano-coated substrate is increased to 4H-5H, so that the hardness of the nano-coated substrate is close to that of glass. Can replace glass in a certain application range, is not easy to break and solves the problem of brittle pain of glass.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to a glass-like composite material and a manufacturing process thereof.
Background
Glass is widely used for display screens, instrument panels, and the like because of its excellent see-through and light-transmitting properties. However, glass is a typical brittle material, the tensile strength is far less than the compressive strength, the impact resistance is poor, the processing of the glass is complex, the raw material cost and the processing cost are high, and the application of the glass in other fields is limited due to the brittleness problem.
The glass-like composite material is applied to a front cover of a mobile phone, a rear shell of the mobile phone, an automobile navigation panel and a display screen. Patent CN112045933A discloses a glass-like composite material and a manufacturing process, which are an early study by researchers of the present invention.
Disclosure of Invention
The impact strength is one of the important properties of the glass-like composite material, and the researchers of the present invention have further conducted intensive research on the improvement of the middle PC injection molding layer on the basis of the prior patent CN112045933A without starting from the conventional outer double-sided film.
The invention discloses a manufacturing process of a glass-like composite material, which comprises the following steps:
s01, preparing a double-sided membrane with one side provided with PC and the other side provided with PMMA;
s02, preparing an injection molding PC material;
s03, placing the two double-sided diaphragms into a cavity in a manner that the PMMA faces outwards, adding injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression.
In some embodiments of the invention, in S01, a single-sided PMMA sheet is prepared.
In some embodiments of the present invention, in S03, two pieces of single-sided PMMA sheets are placed in the cavity, and injection-molded PMMA material is inserted between the two pieces of single-sided sheets, and injection-molded and compressed.
In some preferred embodiments of the present invention, the method further comprises the steps of:
s41, carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding;
and S42, CNC cutting and removing rim charge.
In some preferred embodiments of the present invention, the method further comprises the steps of:
s51, carrying out OPVM, laser etching and spraying bottom covering processes on the PMMA surface of the inner side of the membrane on the surface of the product after injection molding;
s52, carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after the S51 treatment;
and S53, CNC cutting and removing rim charge.
In some preferred embodiments of the present invention, the method further comprises the steps of:
s61, NC polishing to polish the side joint line at high speed;
s62, carrying out OPVM, laser etching and spraying bottom covering processes on the PMMA surface of the membrane on the surface of the product after injection molding;
s63, carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after the S62 treatment according to a conventional method;
and S64, CNC cutting, skirt removing, camera shooting hole completion, fingerprint hole completion and side key hole completion.
In some preferred embodiments of the invention, the injection layer has a thickness of 0.40 to 0.55mm and the total thickness of the double-sided film sheet/injection layer/double-sided film sheet of the sandwich structure is 0.50 to 2.0 mm.
In some preferred embodiments of the present invention, in S02, the raw materials for preparing the injection-molded PC material include: PC resin, an antioxidant, 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, a toughening agent, a mixed stabilizer, ammonium polyphosphate and PET resin.
In some preferred embodiments of the present invention, in S02, the toughening agent is BPM or MBP, preferably BPM.
In some preferred embodiments of the present invention, in S02, in the raw material for preparing the PC material for injection molding, the mixed stabilizer comprises diphenyl phosphite and phosphorous acid, and the weight ratio of diphenyl phosphite to phosphorous acid is (0.5-15), preferably (1-8), and more preferably (4.5-5.5).
In some preferred embodiments of the present invention, in S02, the raw material for preparing the injection-molded PC material comprises the following components in parts by weight:
40-60 parts of PC resin, 10100.5-3 parts of antioxidant, 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 3-8 parts of toughening agent BPM, 0.5-2 parts of diphenyl phosphite and phosphorous acid mixed stabilizer, 3-8 parts of ammonium polyphosphate and 15-25 parts of PET resin, wherein the weight ratio of diphenyl phosphite to phosphorous acid is (1-8): 1.
in some further preferred embodiments of the present invention, in S02, the raw material for preparing the injection-molded PC material comprises the following components in parts by weight:
50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of diphenyl phosphite and phosphorous acid mixed stabilizer, 5 parts of ammonium polyphosphate and 20 parts of PET resin, wherein the weight ratio of diphenyl phosphite to phosphorous acid is 5: 1.
in some preferred embodiments of the present invention, the thickness of the injection molded layer Hb is determined by the following formula:
ha is the thickness of the double-sided membrane, and the value is between 0.1 and 1.0 mm; k1 and k2 are both regulating coefficients and take the values of 1.1-1.3 and 0.8-0.9; c is constant and takes 2.0-2.5.
The second aspect of the invention discloses the product prepared by the preparation method of the first aspect.
In some preferred embodiments of the invention, the product comprises a front cover, a 3D back cover and a Unibody back shell.
Products suitable for the front cover, the 3D rear cover and the Unibody rear shell comprise a mobile phone, an iPad and other handheld terminals.
The invention has the beneficial effects that:
(1) the front cover of the glass-like composite material prepared by the method has high impact strength which reaches more than 670g x 50 cm.
(2) According to the method, diphenyl phosphite and phosphorous acid are used as stabilizers in the injection molding PC preparation, BPM is used as a toughening agent, and the impact strength of the obtained product can be remarkably improved.
(3) The method of the invention utilizes the homogeneity of the bonding surface material to ensure that the bonding surface material is tightly fused and bonded without separation layer; the product is not deformed when being subjected to high temperature and high humidity by using the injection molding balance of the double-sided membrane; by utilizing the hardness foundation of the PMMA outer layer substrate, the hardness of the nano-coated substrate is increased to 4H-5H, so that the hardness of the nano-coated substrate is close to that of glass. Can replace glass in a certain application range, is not easy to break and solves the problem of brittle pain of glass.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The density of the PC resin is 1.30g/cm3Bisphenol A polycarbonate having a molecular weight of 45000. The density of the PET resin is 1.46g/cm3And a molecular weight of 25000.
Unless otherwise specified, the examples and comparative examples are parallel tests with the same components, component contents, preparation steps, preparation parameters.
Example 1
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of stabilizer (diphenyl phosphite and phosphorous acid in a weight ratio of 1: 1), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) placing two double-sided diaphragms into a front cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4a) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(5a) and (4) CNC cutting, and removing the rim charge to obtain the front cover of the imitation glass composite material.
Example 2
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of stabilizer (diphenyl phosphite and phosphorous acid in a weight ratio of 1: 1), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) putting two double-sided diaphragms into a 3D rear cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4b) carrying out OPVM, laser etching and spraying bottom covering processes on a PMMA surface on the inner side of a membrane on the surface of the product after injection molding according to a conventional method;
(5b) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product treated in the step (4b) according to a conventional method;
(6b) and (4) CNC cutting, and removing the rim charge to obtain the 3D rear cover of the imitation glass composite material.
Example 3
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of stabilizer (diphenyl phosphite and phosphorous acid in a weight ratio of 1: 1), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) putting two double-sided diaphragms into a Unibody rear shell type cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4c) polishing the side joint line at high speed by NC polishing according to a conventional method;
(5c) carrying out OPVM, laser etching and spraying bottom covering processes on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(6c) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product treated in the step (5c) according to a conventional method;
(7c) and (4) CNC cutting, removing the skirt, finishing the shooting hole, the fingerprint hole and the side key hole, and obtaining the Unibody rear shell of the imitation glass composite material.
Example 4
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of stabilizer (diphenyl phosphite and 3:1 weight ratio of phosphorous acid), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) placing two double-sided diaphragms into a front cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4a) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(5a) and (4) CNC cutting, and removing the rim charge to obtain the front cover of the imitation glass composite material.
Example 5
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of stabilizer (diphenyl phosphite and 5:1 weight ratio of phosphorous acid), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) placing two double-sided diaphragms into a front cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4a) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(5a) and (4) CNC cutting, and removing the rim charge to obtain the front cover of the imitation glass composite material.
Example 6
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of stabilizer (diphenyl phosphite and 7:1 parts by weight of phosphorous acid), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) placing two double-sided diaphragms into a front cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4a) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(5a) and (4) CNC cutting, and removing the rim charge to obtain the front cover of the imitation glass composite material.
Example 7
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of stabilizer (diphenyl phosphite and 9:1 parts by weight of phosphorous acid), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) placing two double-sided diaphragms into a front cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4a) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(5a) and (4) CNC cutting, and removing the rim charge to obtain the front cover of the imitation glass composite material.
Example 8
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of flexibilizer MBP, 1 part of stabilizer (diphenyl phosphite and phosphorous acid in a weight ratio of 1: 1), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) placing two double-sided diaphragms into a front cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4a) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(5a) and (4) CNC cutting, and removing the rim charge to obtain the front cover of the imitation glass composite material.
Example 9
A manufacturing process of a glass-like composite material comprises the following steps:
(1) preparing a double-sided membrane with one side of PC and one side of PMMA by a conventional method;
(2) mixing 50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of flexibilizer MBP, 1 part of stabilizer (diphenyl phosphite and 5:1 weight ratio of phosphorous acid), 5 parts of ammonium polyphosphate and 20 parts of PET resin, and performing melt extrusion granulation by a screw machine according to a conventional method to obtain an injection molding PC material;
(3) placing two double-sided diaphragms into a front cover cavity in a manner that PMMA faces outwards, adding an injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression according to a conventional method;
(4a) carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding according to a conventional method;
(5a) and (4) CNC cutting, and removing the rim charge to obtain the front cover of the imitation glass composite material.
Example 9
A process for the manufacture of a glass-simulated composite, as in example 1, further comprising the step of determining the thickness of the injection molded layer Hb by the formula:
ha is the thickness of the double-sided membrane, and the value is between 0.1 and 1.0 mm; k1 and k2 are both regulating coefficients and take the values of 1.1-1.3 and 0.8-0.9; c is constant and takes 2.0-2.5.
Research shows that the front cover obtained by the method for determining the thickness of the injection molding layer according to the thickness of the double-sided membrane has good hardness and impact strength, and is obviously superior to products with thicknesses outside the range.
Comparative example 1
A process for the manufacture of a glass-like composite, which differs from that of example 1 in that the stabiliser is phosphorous acid only.
Examples of the experiments
The front covers of the glass-like composite materials of the examples and the comparative examples are taken for performance examination of impact strength. The results are shown in Table 1.
TABLE 1 impact Strength of front covers of glass-like composites
In the same column of data, marked with different lower case letters to represent significant difference, P is less than 0.05
The results show that the weight ratio of diphenyl phosphite to phosphorous acid in the stabilizer significantly affects the impact strength of the rear cover when BPM is used as the toughening agent, the examples are significantly better than the comparative examples, with example 5 being the most preferred and example 7 being the worse; when MBP is used as a toughening agent, the weight ratio of diphenyl phosphite and phosphorous acid in the stabilizer has little influence on the impact strength of the rear cover, indicating the specific interaction of BPM with diphenyl phosphite and phosphorous acid.
While the preferred embodiments and examples of the present invention have been described in detail, the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The manufacturing process of the glass-like composite material is characterized by comprising the following steps of:
s01, preparing a double-sided membrane with one side provided with PC and the other side provided with PMMA;
s02, preparing an injection molding PC material;
s03, placing the two double-sided diaphragms into a cavity in a manner that the PMMA faces outwards, adding injection molding PC material between the two double-sided diaphragms, and performing injection molding and compression.
2. The manufacturing process according to claim 1, wherein in S01, a single-sided PMMA sheet is prepared;
and/or in S03, putting two single-sided PMMA films into the cavity, adding injection-molded PMMA material between the two single-sided films, and performing injection molding and compression.
3. The manufacturing process according to claim 1 or 2, further comprising the steps of:
s41, carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after injection molding;
and S42, CNC cutting and removing rim charge.
4. The manufacturing process according to claim 1 or 2, further comprising the steps of:
s51, carrying out OPVM, laser etching and spraying bottom covering processes on the PMMA surface of the inner side of the membrane on the surface of the product after injection molding;
s52, carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after the S51 treatment;
and S53, CNC cutting and removing rim charge.
5. The manufacturing process according to claim 1 or 2, further comprising the steps of:
s61, NC polishing to polish the side joint line at high speed;
s62, carrying out OPVM, laser etching and spraying bottom covering processes on the PMMA surface of the membrane on the surface of the product after injection molding;
s63, carrying out UV curing nano coating treatment on the PMMA surface of the membrane on the surface of the product after the S62 treatment according to a conventional method;
and S64, CNC cutting, skirt removing, camera shooting hole completion, fingerprint hole completion and side key hole completion.
6. The manufacturing process according to claim 1 or 2, wherein the thickness of the injection layer is 0.40-0.55mm, and the total thickness of the double-sided membrane sheet/injection layer/double-sided membrane sheet of the sandwich structure is 0.50-2.0 mm.
7. The manufacturing process of claim 1, wherein in S02, the raw materials for preparing the injection-molded PC material comprise: PC resin, an antioxidant, 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, a toughening agent, a mixed stabilizer, ammonium polyphosphate and PET resin;
the toughening agent is BPM;
in the raw materials for preparing the injection molding PC material, the mixed stabilizer comprises diphenyl phosphite and phosphorous acid, and the weight ratio of the diphenyl phosphite to the phosphorous acid is (4.5-5.5).
8. The manufacturing process according to claim 1, wherein in S02, the raw material for preparing the injection molding PC material comprises the following components in parts by weight:
40-60 parts of PC resin, 10100.5-3 parts of antioxidant, 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 3-8 parts of toughening agent BPM, 0.5-2 parts of diphenyl phosphite and phosphorous acid mixed stabilizer, 3-8 parts of ammonium polyphosphate and 15-25 parts of PET resin, wherein the weight ratio of diphenyl phosphite to phosphorous acid is (1-8): 1.
9. the manufacturing process according to claim 1, wherein in S02, the raw material for preparing the injection molding PC material comprises the following components in parts by weight:
50 parts of PC resin, 10101 parts of antioxidant, 5 parts of 3-isopropenyl-alpha, alpha-dimethylphenyl isocyanate, 5 parts of toughening agent BPM, 1 part of diphenyl phosphite and phosphorous acid mixed stabilizer, 5 parts of ammonium polyphosphate and 20 parts of PET resin, wherein the weight ratio of diphenyl phosphite to phosphorous acid is 5: 1.
10. a product made according to the manufacturing process of any of claims 1-9, the product comprising a front cover, a 3D back cover, and a Unibody back shell.
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| CN110181755B (en) * | 2019-06-03 | 2020-10-27 | 陈福年 | Manufacturing method of imitation glass of rear cover of 3D-effect mobile phone |
| CN112045933A (en) * | 2020-08-21 | 2020-12-08 | 深圳市好年璟科技有限公司 | Glass-like composite material and manufacturing process thereof |
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| US2964799A (en) * | 1957-06-06 | 1960-12-20 | Us Rubber Co | Method of making plastic foam laminates |
| JP2012251083A (en) * | 2011-06-03 | 2012-12-20 | Mitsubishi Engineering Plastics Corp | Aromatic polycarbonate resin composition and molding comprising the same |
| CN107805452A (en) * | 2017-11-18 | 2018-03-16 | 谢飞 | A kind of high intensity UV resin and preparation method thereof |
| CN111347703A (en) * | 2018-12-24 | 2020-06-30 | 深圳市好年璟科技有限公司 | Manufacturing method of mobile phone rear cover with 3D effect |
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