Antistatic polycarbonate composite carrier tape and method of making same
By preparing a composite material of silicon-containing polycarbonate and modified carbon black, the problems of heat resistance and antistatic properties of carrier tape materials were solved, and a polycarbonate composite carrier tape with high strength and good antistatic effect was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN JINCHENG BELT CO LTD
- Filing Date
- 2026-03-18
- Publication Date
- 2026-06-12
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] This invention belongs to the field of polymer materials technology, specifically relating to an antistatic polycarbonate composite carrier tape and its preparation method. Background Technology
[0002] Carrier tape is a packaging material for electronic components. It is a crucial carrier and consumable in the SMT (Surface Mount Technology) process, working in conjunction with cover tape to provide packaging and other functionalities for electronic components, such as specialized encapsulation, ESD protection, and transport capabilities. This underscores the vital role of carrier tape in the entire SMT process; its quality directly determines the packaging performance of electronic components. In high-tech fields such as electronics manufacturing, semiconductor packaging, and automated production lines, the importance of carrier tape as a transport and protection medium for precision components is self-evident. With the rapid development of the global technology industry, especially the widespread application of emerging technologies such as 5G, IoT, and AI, the demand for electronic components has surged, driving the rapid growth of the carrier tape market.
[0003] The carrier tape has the following advantages: (1) The carrier tape made of special materials can effectively isolate the external environment from the corrosion of components, such as moisture-proof, dust-proof, and anti-static; (2) The carrier tape can achieve precise positioning, ensuring accurate placement and rapid identification of components, reducing the need for manual intervention and error rate; (3) It is highly compatible with automated equipment, realizing a fully automated process from material supply and transmission to assembly, which greatly improves production efficiency; (4) The size, material and structure of the carrier tape can be flexibly customized according to the size and characteristics of different components to meet diverse needs.
[0004] Chinese patent (publication number CN112266597B) discloses a conductive polycarbonate composition for carrier tape and the carrier tape made therefrom. The composition comprises polycarbonate, carbon black, a first polymer, a third polymer, and additives. The first polymer is a thermoplastic polyester; the third polymer is a binary or terpolymer of ethylene with glycidyl methacrylate and acrylate. This invention achieves low surface resistivity, significantly reduced surface bumps, and markedly improved impact strength in the carrier tape formed by adding the first, second, and third polymers, while also possessing high toughness and clearly defined inclusion holes. However, this patent lacks research on the heat resistance of the carrier tape, and properties such as tensile strength need further improvement.
[0005] Therefore, there is an urgent need for a polycarbonate composite carrier tape that uses polycarbonate as the main raw material and adds functional components to achieve good antistatic effect while improving the material's heat distortion temperature and mechanical properties. Summary of the Invention
[0006] To address the shortcomings of existing technologies, the present invention aims to provide an antistatic polycarbonate composite carrier tape and its preparation method. The invention first uses terminal hydrogen silicone oil and eugenol as raw materials to undergo a heated reaction to obtain phenolic hydroxyl silicone oil. Then, diphenyl carbonate, bisphenol A, and phenolic hydroxyl silicone oil are mixed and copolymerized to obtain a silicon-containing polycarbonate. Next, carbon black is sequentially oxidized, aminated, and grafted to obtain a modified carbon black composite material. This material is then combined with polyethylene terephthalate, polyolefins, antioxidants, and heat stabilizers to prepare an antistatic polycarbonate composite carrier tape, effectively reducing the insulation resistance of the material while improving tensile strength and heat distortion temperature.
[0007] In a first aspect, the present invention provides an antistatic polycarbonate composite carrier tape, comprising the following components in parts by weight: 70-80 parts of silicon-containing polycarbonate, 8-10 parts of carbon black material, 6-8 parts of polyethylene terephthalate, 4-6 parts of polyolefin, 0.4-0.6 parts of antioxidant, and 0.4-0.6 parts of heat stabilizer.
[0008] As a preferred embodiment of the present invention, the weight parts of the silicon-containing polycarbonate may be 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, or 80 parts, etc.
[0009] As a preferred embodiment of the present invention, the carbon black material may be in the form of 8 parts, 9 parts, or 10 parts by weight.
[0010] As a preferred embodiment of the present invention, the polyethylene terephthalate may be in the following weight proportions: 6 parts, 7 parts, or 8 parts, etc.
[0011] As a preferred embodiment of the present invention, the polyolefin may be in the form of 4 parts, 5 parts, or 6 parts by weight.
[0012] As a preferred embodiment of the present invention, the antioxidant may be present in parts by weight of 0.4 parts, 0.5 parts, or 0.6 parts, etc.
[0013] As a preferred embodiment of the present invention, the heat stabilizer may be present in the following weight proportions: 0.4 parts, 0.5 parts, or 0.6 parts, etc.
[0014] As a preferred technical solution of the present invention, the preparation method of the silicon-containing polycarbonate is as follows: first, a heated reaction is carried out using terminal hydrogen silicone oil and eugenol as raw materials to obtain phenolic hydroxyl silicone oil; then, diphenyl carbonate, bisphenol A and the phenolic hydroxyl silicone oil are mixed and copolymerized to obtain silicon-containing polycarbonate.
[0015] In the silicon-containing polycarbonate of this invention, the polycarbonate segments provide a rigid framework, and the organosilicon segments form physical cross-linking points or energy dissipation units through microphase separation. Under external force, these segments can effectively disperse stress, prevent crack propagation, and improve the tensile strength of the carrier tape. The main chain of the silicone oil is composed of high-bond-energy Si-O bonds, which can provide excellent heat resistance. At the same time, the benzene rings contained in the phenolic hydroxyl silicone oil inhibit the movement of polymer chain segments through steric hindrance, significantly improving the heat distortion temperature of the material. In addition, the continuous Si-O-Si network provides charge transport channels, accelerates electrostatic charge leakage, and thus reduces insulation resistance.
[0016] As a preferred technical solution of the present invention, the heating reaction step is as follows: 80-100 parts by weight of terminal hydrogen silicone oil and 6-10 parts by weight of eugenol are mixed, 0.04-0.06 parts by weight of palladium alumina catalyst are added under a nitrogen atmosphere, the temperature is raised to 100-110°C and reacted for 4-6 hours, and centrifuged to obtain phenolic hydroxyl silicone oil.
[0017] As a preferred technical solution of the present invention, the copolymerization reaction steps are as follows: by weight, 80-100 parts of diphenyl carbonate, 80-100 parts of bisphenol A, 0.01-0.02 parts of lithium acetate and 4-6 parts of the phenolic hydroxyl silicone oil are mixed and copolymerized at 190-200°C for 3-5 hours, 180-200 parts of dichloromethane are added to dissolve, filtered, and the filtrate is purified and dried to obtain silicon-containing polycarbonate.
[0018] This invention first synthesizes phenolic hydroxyl silicone oil using eugenol and terminal hydrogen silicone oil as raw materials in the presence of a platinum catalyst. Then, the synthesized phenolic hydroxyl silicone oil is copolymerized with diphenyl carbonate and bisphenol A to prepare silicone-containing polycarbonate block copolymer.
[0019] As a preferred embodiment of the present invention, the carbon black material is a modified carbon black composite material.
[0020] As a preferred technical solution of the present invention, the preparation method of the modified carbon black composite material is as follows: first, carbon black is oxidized to obtain oxidized carbon black; then, the oxidized carbon black is aminated using 3-aminopropyltriethoxysilane to obtain aminated carbon black; and the aminated carbon black is grafted and modified using aniline to obtain the modified carbon black composite material.
[0021] The modified carbon black composite material of the present invention, uniformly dispersed in the composite carrier, can effectively transfer stress from the flexible polymer matrix to the rigid carbon black particles, thereby effectively improving the overall strength of the material. At the same time, the modified carbon black composite material can more effectively restrict the movement and relaxation of polymer molecular chains when heated, and acts as a physical crosslinking point to improve the shape retention ability of the material at high temperatures, thereby increasing the heat distortion temperature. In addition, a tunneling effect can be generated between carbon black particles, and polyaniline forms a mixed conductive channel. The two together construct an efficient electronic conductive network, reducing the surface resistance of the carrier.
[0022] As a preferred technical solution of the present invention, the oxidation treatment steps are as follows: by weight, 4-6 parts of carbon black are added to 200-250 parts of hydrogen peroxide solution with a mass concentration of 30% and stirred for 10-20 minutes, then ultrasonically dispersed for 30-40 minutes, heated to 60-70°C and stirred under reflux for 20-24 hours, filtered, the filter residue is washed with water and dried to obtain oxidized carbon black.
[0023] As a preferred technical solution of the present invention, the amination treatment step is as follows: by weight, 400-450 parts of anhydrous ethanol and 50-100 parts of deionized water are mixed, then 10-20 parts of 3-aminopropyltriethoxysilane are added and ultrasonicated for 20-30 minutes, then 4-6 parts of carbon black oxide are added and ultrasonically dispersed for 120-140 minutes, the temperature is raised to 75-80°C for amination treatment for 6-8 hours, the mixture is filtered, the filter residue is washed with anhydrous ethanol, and the mixture is vacuum dried to obtain amination-treated carbon black.
[0024] As a preferred technical solution of the present invention, the grafting modification step is as follows: by weight, 4-6 parts of amino-modified carbon black and 40-50 parts of hexadecyltrimethylammonium bromide are added to 280-300 parts of toluene, then 20-30 parts of aniline and 60-70 parts of dodecylbenzenesulfonic acid are added and ultrasonicated for 10-20 minutes, then 100-120 parts of 20% ammonium persulfate aqueous solution are added and stirred for 5-10 minutes, transferred to 2-4°C for grafting modification for 20-24 hours, washed with methanol, filtered, and the filter cake is washed with water and dried to obtain the modified carbon black composite material.
[0025] This invention first uses hydrogen peroxide, a strong oxidant, to introduce oxygen-containing functional groups such as hydroxyl groups onto the surface of carbon black to obtain carbon black oxide. Then, 3-aminopropyltriethoxysilane, a silane coupling agent, is used to covalently graft onto the surface of carbon black oxide to obtain aminated carbon black. Next, aminated carbon black, aniline, hexadecyltrimethylammonium bromide, and dodecylbenzenesulfonic acid are used as composite surfactants to form a microemulsion system with ammonium persulfate aqueous solution. Aniline is grafted onto the surface of carbon black through emulsion polymerization to finally prepare a modified carbon black composite material with aniline on the surface.
[0026] As a preferred embodiment of the present invention, the polyolefin is polyethylene or polypropylene.
[0027] As a preferred embodiment of the present invention, the heat stabilizer is dibutyltin dilaurate or dibutyltin maleate.
[0028] As a preferred embodiment of the present invention, the antioxidant is selected from one or more of antioxidant 1010, antioxidant 168, and antioxidant 1076.
[0029] A second aspect of the present invention provides a method for preparing an antistatic polycarbonate composite carrier tape as described in the first aspect, comprising the following steps: mixing silicon-containing polycarbonate, carbon black, polyethylene terephthalate, polyolefin, antioxidant and heat stabilizer and then kneading the mixture, and processing it through an extruder to obtain slab material; and further processing the slab material by co-extrusion, cooling and shaping to obtain an antistatic polycarbonate composite carrier tape.
[0030] Compared with the prior art, the present invention has the following beneficial effects: (1) The polyaniline in the modified carbon black composite material of the present invention can act as a polymer interface compatibilizer. Through the benzene ring structure, it generates π-π conjugation with the benzene ring of silicon-containing polycarbonate, which enhances the interaction between molecular chains and improves the structural regularity of the composite system. At the same time, the residual groups on the surface of the modified carbon black composite material can interact with the silicon-oxygen bonds in the silicon-containing polycarbonate to further enhance the interfacial bonding. Through synergistic interaction, the comprehensive performance of the polycarbonate composite carrier is effectively improved.
[0031] (2) The silicon-containing polycarbonate of the present invention provides an elastic network to absorb impact energy, and the modified carbon black composite material forms a rigid reinforcing skeleton to restrict the movement of molecular chains, which synergistically improves mechanical properties. In addition, the silicon-oxygen bonds of the silicon-containing polycarbonate have high thermal stability and form a thermal resistance barrier. The high thermal conductivity of carbon black accelerates heat transfer and avoids local overheating, effectively improving the heat resistance of the material. At the same time, the modified carbon black composite material can provide a continuous conductive path. The silicon-containing polycarbonate acts as a conductive network bridge to balance the interface barrier, thereby giving the composite carrier tape good antistatic properties. Detailed Implementation
[0032] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.
[0033] The sources of some components in the examples and comparative examples are as follows: Hydrogen-terminated silicone oil, CAS No. 70900-21-9, purchased from Wuhan Xinweiye Chemical Co., Ltd. Eugenol, CAS No. 579-60-2, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Palladium alumina catalyst, catalog number P196246, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Diphenyl carbonate, CAS No. 102-09-0, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Bisphenol A, CAS No. 80-05-7, purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Lithium acetate, CAS No. 546-89-4, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Carbon black, product number C124422, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Hydrogen peroxide solution, catalog number H639762, mass concentration fraction 30%, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. 3-Aminopropyltriethoxysilane, CAS No. 919-30-2, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Hexadecyltrimethylammonium bromide, CAS No. 57-09-0, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Aniline, CAS No. 62-53-3, was purchased from Sinopharm Chemical Reagent Co., Ltd. Dodecylbenzenesulfonic acid, CAS No. 85536-14-7, was purchased from Sinopharm Chemical Reagent Co., Ltd. Ammonium persulfate, CAS No. 7727-54-0, purchased from Sinopharm Chemical Reagent Co., Ltd. Polyethylene terephthalate, product number P303204, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Polyethylene, product number P434354, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Polypropylene, product number P434412, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Dibutyltin dilaurate, CAS No. 77-58-7, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Dibutyltin maleate, CAS No. 78-04-6, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Commercially available polycarbonate, product number P303193, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Example 1
[0034] This embodiment provides an antistatic polycarbonate composite carrier tape, which is composed of the following components in parts by weight: 80 parts of silicon-containing polycarbonate, 10 parts of modified carbon black composite material, 8 parts of polyethylene terephthalate, 6 parts of polyethylene, 0.6 parts of antioxidant 1010, and 0.6 parts of heat stabilizer dibutyltin dilaurate.
[0035] Preparation of silicon-containing polycarbonate: By weight, 100 parts of terminal hydrogen silicone oil and 10 parts of eugenol were mixed, and 0.06 parts of palladium alumina catalyst were added under a nitrogen atmosphere. The mixture was heated to 110°C and reacted for 4 hours. After centrifugation, phenolic hydroxyl silicone oil was obtained. 100 parts of diphenyl carbonate, 100 parts of bisphenol A, 0.02 parts of lithium acetate and 6 parts of the phenolic hydroxyl silicone oil were mixed and copolymerized at 200°C for 3 hours. 200 parts of dichloromethane were added to dissolve the mixture, and after filtration, the filtrate was purified and dried to obtain silicon-containing polycarbonate.
[0036] Preparation of modified carbon black composite materials: By weight, 6 parts of carbon black were added to 250 parts of a 30% (w / w) hydrogen peroxide solution and stirred for 20 min, then ultrasonically dispersed for 40 min, heated to 70℃ and refluxed for 20 h, filtered, the filter residue was washed with water, and dried to obtain carbon black oxide; 450 parts of anhydrous ethanol and 50 parts of deionized water were mixed, then 20 parts of 3-aminopropyltriethoxysilane were added and ultrasonically dispersed for 30 min, followed by the addition of 6 parts of carbon black oxide and ultrasonic dispersion for 140 min, and then heated to 80℃ for ammonia treatment. After 6 hours of basic treatment, the mixture was filtered, the filter residue was washed with anhydrous ethanol, and then vacuum dried to obtain aminated carbon black. 4-6 parts of aminated carbon black and 40-50 parts of hexadecyltrimethylammonium bromide were added to 300 parts of toluene, followed by the addition of 30 parts of aniline and 70 parts of dodecylbenzenesulfonic acid. The mixture was then sonicated for 20 minutes, and 120 parts of a 20% ammonium persulfate aqueous solution were added and stirred for 10 minutes. The mixture was then transferred to 4°C for graft modification for 20 hours, washed with methanol, filtered, and the filter cake was washed with water and dried to obtain the modified carbon black composite material. Example 2
[0037] This embodiment provides an antistatic polycarbonate composite carrier tape, which is composed of the following components in parts by weight: 70 parts of silicon-containing polycarbonate, 8 parts of modified carbon black composite material, 6 parts of polyethylene terephthalate, 4 parts of polypropylene, 0.4 parts of antioxidant 168, and 0.4 parts of heat stabilizer dibutyltin maleate.
[0038] Preparation of silicon-containing polycarbonate: By weight, 80 parts of terminal hydrogen silicone oil and 6 parts of eugenol were mixed, and 0.04 parts of palladium alumina catalyst were added under a nitrogen atmosphere. The mixture was heated to 100℃ and reacted for 6 hours. After centrifugation, phenolic hydroxyl silicone oil was obtained. 80 parts of diphenyl carbonate, 80 parts of bisphenol A, 0.01 parts of lithium acetate and 4 parts of the phenolic hydroxyl silicone oil were mixed and copolymerized at 190℃ for 5 hours. 180 parts of dichloromethane were added to dissolve the mixture, and after filtration, the filtrate was purified and dried to obtain silicon-containing polycarbonate.
[0039] Preparation of modified carbon black composite material: By weight, 4 parts of carbon black were added to 200 parts of a 30% (w / w) hydrogen peroxide solution and stirred for 10 min, then ultrasonically dispersed for 30 min, heated to 60℃ and refluxed for 24 h, filtered, the filter residue was washed with water, and dried to obtain carbon black oxide; 400 parts of anhydrous ethanol and 100 parts of deionized water were mixed, then 10 parts of 3-aminopropyltriethoxysilane were added and ultrasonically dispersed for 20 min, followed by the addition of 4 parts of carbon black oxide and ultrasonic dispersion for 120 min, and then heated to 75℃. Aminated carbon black was obtained by amination treatment for 8 hours, followed by filtration, washing of the filter residue with anhydrous ethanol, and vacuum drying. Four parts of aminated carbon black and 40 parts of hexadecyltrimethylammonium bromide were added to 280 parts of toluene, then 20 parts of aniline and 60 parts of dodecylbenzenesulfonic acid were added and ultrasonicated for 10 minutes. Then, 100 parts of 20% ammonium persulfate aqueous solution were added and stirred for 5 minutes. The mixture was then transferred to 2°C for graft modification for 24 hours, washed with methanol, filtered, and the filter cake was washed with water and dried to obtain the modified carbon black composite material. Example 3
[0040] This embodiment provides an antistatic polycarbonate composite carrier tape, which is composed of the following components in parts by weight: 75 parts silicon-containing polycarbonate, 9 parts modified carbon black composite material, 7 parts polyethylene terephthalate, 5 parts polyethylene, 0.5 parts antioxidant 1076, and 0.5 parts heat stabilizer dibutyltin dilaurate.
[0041] Preparation of silicon-containing polycarbonate: 90 parts by weight of terminal hydrogen silicone oil and 8 parts by weight of eugenol were mixed, and 0.05 parts by weight of palladium alumina catalyst were added under a nitrogen atmosphere. The mixture was heated to 105℃ and reacted for 5 h. After centrifugation, phenolic hydroxyl silicone oil was obtained. 90 parts by weight of diphenyl carbonate, 90 parts by weight of bisphenol A, 0.015 parts by weight of lithium acetate and 5 parts by weight of the phenolic hydroxyl silicone oil were mixed and copolymerized at 195℃ for 4 h. 190 parts by weight of dichloromethane were added to dissolve the mixture. After filtration, the filtrate was purified and dried to obtain silicon-containing polycarbonate.
[0042] Preparation of modified carbon black composite material: By weight, 5 parts of carbon black were added to 220 parts of a 30% (w / w) hydrogen peroxide solution and stirred for 15 min, then ultrasonically dispersed for 35 min, heated to 65℃ and refluxed for 22 h, filtered, the filter residue was washed with water, and dried to obtain carbon black oxide; 420 parts of anhydrous ethanol and 80 parts of deionized water were mixed, then 15 parts of 3-aminopropyltriethoxysilane were added and ultrasonically dispersed for 25 min, followed by the addition of 5 parts of carbon black oxide and ultrasonic dispersion for 130 min, and then heated to 78℃. Aminated carbon black was obtained by amination treatment for 7 hours, followed by filtration, washing of the filter residue with anhydrous ethanol, and vacuum drying. 5 parts of aminated carbon black and 45 parts of hexadecyltrimethylammonium bromide were added to 290 parts of toluene, then 25 parts of aniline and 65 parts of dodecylbenzenesulfonic acid were added and sonicated for 15 minutes. 110 parts of 20% ammonium persulfate aqueous solution were then added and stirred for 8 minutes. The mixture was transferred to 3°C for graft modification for 22 hours, washed with methanol, filtered, and the filter cake was washed with water and dried to obtain the modified carbon black composite material.
[0043] Comparative Example 1 The difference between this comparative example and Example 1 is that commercially available polycarbonate (item number P303193) was used instead of silicon-containing polycarbonate.
[0044] Comparative Example 2 The difference between this comparative example and Example 1 is that commercially available carbon black (item number C124422) was used instead of the modified carbon black composite material.
[0045] Comparative Example 3 The difference between this comparative example and Example 1 is that: aminated carbon black is used instead of modified carbon black composite material.
[0046] The properties of the polycarbonate composite carrier tapes provided in the above embodiments and comparative examples were tested using the following methods: (1) Antistatic performance test: Surface resistance test shall be performed in accordance with the requirements of GB / T 31838.3-2019 Dielectric and resistive properties of solid insulating materials Part 3: Resistive properties (DC method) Surface resistance and surface resistivity, and the antistatic performance shall be evaluated by surface resistance.
[0047] (2) Tensile strength test: The test shall be conducted in accordance with the requirements of GB / T 1040.1-2025 Determination of tensile properties of plastics Part 1: General Rules.
[0048] (3) Heat distortion temperature test: The test shall be conducted in accordance with the requirements of GB / T 1634.2-2019 Determination of load distortion temperature of plastics - Part 2: Plastics and hard rubber.
[0049] The performance test data above are shown in Table 1.
[0050] Table 1 Performance Test Results
[0051] As can be seen from the above, the present invention first uses terminal hydrogen silicone oil and eugenol as raw materials to carry out a heated reaction to obtain phenolic hydroxyl silicone oil, then mixes diphenyl carbonate, bisphenol A and phenolic hydroxyl silicone oil to carry out a copolymerization reaction to obtain silicon-containing polycarbonate, and then performs oxidation treatment, amination treatment and graft modification on carbon black in sequence to obtain modified carbon black composite material. Combined with polyethylene terephthalate, polyolefin, antioxidant and heat stabilizer and other raw materials, an antistatic polycarbonate composite carrier tape (Examples 1 to 3) is prepared, which has the best comprehensive performance.
[0052] Compared to Example 1, the use of commercially available polycarbonate (item number P303193) instead of silicon-containing polycarbonate resulted in a decrease in surface resistivity, tensile strength, and heat resistance of the carrier tape due to the lack of the role of organosilicon segments (Comparative Example 1). Compared to Example 1, the use of commercially available carbon black (item number C124422) instead of modified carbon black composite material resulted in a decrease in surface resistivity, tensile strength, and heat resistance of the carrier tape due to the lack of the role of oxygen-containing groups and polyaniline (Comparative Example 2). Compared to Example 1, the use of aminated carbon black instead of modified carbon black composite material resulted in a decrease in surface resistivity, tensile strength, and heat resistance of the carrier tape due to the lack of the role of polyaniline (Comparative Example 3).
Claims
1. An antistatic polycarbonate composite carrier tape, characterized in that, It is composed of the following components in parts by weight: 70-80 parts of silicon-containing polycarbonate, 8-10 parts of carbon black material, 6-8 parts of polyethylene terephthalate, 4-6 parts of polyolefin, 0.4-0.6 parts of antioxidant, and 0.4-0.6 parts of heat stabilizer. The preparation method of the silicon-containing polycarbonate is as follows: first, a heated reaction is carried out using terminal hydrogen silicone oil and eugenol as raw materials to obtain phenolic hydroxyl silicone oil; then, diphenyl carbonate, bisphenol A and the phenolic hydroxyl silicone oil are mixed and copolymerized to obtain silicon-containing polycarbonate.
2. The antistatic polycarbonate composite carrier tape according to claim 1, characterized in that, The heating reaction step is as follows: 80-100 parts by weight of terminal hydrogen silicone oil and 6-10 parts by weight of eugenol are mixed, 0.04-0.06 parts by weight of palladium alumina catalyst are added under a nitrogen atmosphere, the temperature is raised to 100-110℃ and reacted for 4-6 hours, and centrifuged to obtain phenolic hydroxyl silicone oil.
3. The antistatic polycarbonate composite carrier tape according to claim 1, characterized in that, The copolymerization reaction steps are as follows: by weight, 80-100 parts of diphenyl carbonate, 80-100 parts of bisphenol A, 0.01-0.02 parts of lithium acetate and 4-6 parts of the phenolic hydroxyl silicone oil are mixed and copolymerized at 190-200°C for 3-5 hours. Then, 180-200 parts of dichloromethane are added to dissolve the mixture, and the mixture is filtered. The filtrate is purified and dried to obtain silicon-containing polycarbonate.
4. The antistatic polycarbonate composite carrier tape according to claim 1, characterized in that, The carbon black material is a modified carbon black composite material; The modified carbon black composite material is prepared by first oxidizing carbon black to obtain oxidized carbon black; then amifying the oxidized carbon black with 3-aminopropyltriethoxysilane to obtain aminated carbon black; and then grafting the aminated carbon black with aniline to obtain the modified carbon black composite material.
5. The antistatic polycarbonate composite carrier tape according to claim 4, characterized in that, The oxidation treatment steps are as follows: by weight, 4-6 parts of carbon black are added to 200-250 parts of hydrogen peroxide solution with a mass concentration of 30% and stirred for 10-20 minutes, then ultrasonically dispersed for 30-40 minutes, heated to 60-70℃ and stirred and refluxed for 20-24 hours, filtered, the filter residue is washed with water and dried to obtain carbon black oxide.
6. The antistatic polycarbonate composite carrier tape according to claim 4, characterized in that, The amination treatment steps are as follows: by weight, 400-450 parts of anhydrous ethanol and 50-100 parts of deionized water are mixed, then 10-20 parts of 3-aminopropyltriethoxysilane are added and ultrasonicated for 20-30 min, then 4-6 parts of carbon black oxide are added and ultrasonically dispersed for 120-140 min, the temperature is raised to 75-80℃ for amination treatment for 6-8 h, the mixture is filtered, the filter residue is washed with anhydrous ethanol, and the mixture is vacuum dried to obtain amination-treated carbon black.
7. The antistatic polycarbonate composite carrier tape according to claim 4, characterized in that, The grafting modification steps are as follows: by weight, 4-6 parts of amino-modified carbon black and 40-50 parts of hexadecyltrimethylammonium bromide are added to 280-300 parts of toluene, then 20-30 parts of aniline and 60-70 parts of dodecylbenzenesulfonic acid are added and ultrasonicated for 10-20 minutes, then 100-120 parts of 20% ammonium persulfate aqueous solution are added and stirred for 5-10 minutes. The mixture is then transferred to a temperature of 2-4°C for grafting modification for 20-24 hours. After washing with methanol and filtration, the filter cake is washed with water and dried to obtain the modified carbon black composite material.
8. The antistatic polycarbonate composite carrier tape according to claim 1, characterized in that, The polyolefin is polyethylene or polypropylene.
9. The antistatic polycarbonate composite carrier tape according to claim 1, characterized in that, The heat stabilizer is dibutyltin dilaurate or dibutyltin maleate.
10. A method for preparing an antistatic polycarbonate composite carrier tape as described in any one of claims 1 to 9, characterized in that, The process includes the following steps: mixing silicon-containing polycarbonate, carbon black, polyethylene terephthalate, polyolefin, antioxidant and heat stabilizer, and then kneading the mixture to obtain chip material through an extruder; then co-extruding and cooling the chip material to obtain an antistatic polycarbonate composite carrier tape.