CN113698650B - 一种塑料手机后盖的成型工艺 - Google Patents
一种塑料手机后盖的成型工艺 Download PDFInfo
- Publication number
- CN113698650B CN113698650B CN202110002185.XA CN202110002185A CN113698650B CN 113698650 B CN113698650 B CN 113698650B CN 202110002185 A CN202110002185 A CN 202110002185A CN 113698650 B CN113698650 B CN 113698650B
- Authority
- CN
- China
- Prior art keywords
- mobile phone
- rear cover
- nano
- temperature
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
- B08B2203/0217—Use of a detergent in high pressure cleaners; arrangements for supplying the same
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2455/00—Characterised by the use of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08J2423/00 - C08J2453/00
- C08J2455/02—Acrylonitrile-Butadiene-Styrene [ABS] polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Signal Processing (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
本发明公开了一种塑料手机后盖的成型工艺,涉及薄壁塑件加工技术领域,按7:3的重量比分别取聚碳酸酯和ABS树脂,加入10wt%的纳米Al203,混合均匀后,于90~110℃下干燥2~4h,然后通过注塑成型加工成手机后盖,并利用高压复合阳极氧化使手机后盖表面的纳米Al203与聚四氟乙烯反应生成不均匀的Al203/聚四氟乙烯复合氧化膜,再于手机后盖表面喷涂形成一层均匀的四氟乙烯/碳酸钙复合涂层。本发明的手机后盖拉伸强度、韧性和冲击强度,使手机后盖的综合性能好,并在手机后盖表面形成均匀致密的四氟乙烯/CaCO3复合涂层,复合涂层耐腐蚀性强、膜层硬度高、摩擦系数小,可达到超疏水性的效果,使手机后盖具有抗污、自清洁、耐化学药品腐蚀等优异的特性。
Description
技术领域
本发明涉及薄壁塑件加工技术领域,尤其涉及一种塑料手机后盖的成型工艺。
背景技术
随着社会的发展,电子产品的使用频率越来越高,手机作为一款重要的电子产品,已经成为了我们生活不可或缺的一部分。随着手机功能的功能越来越丰富,消费者对手机的需求也越来越高,不仅要求手机的软件配置高,同时对手机的硬件配置功能的要求也越来越高。手机后盖是手机的重要组成部分,能够对手机起到保护的作用,同时也是使用手机过程中接触最多的部位。目前,手机后盖的材质主要包括金属机壳和塑胶机壳两大类。由于塑料产品具有质量轻、化学稳定性好、耐冲击性好、比强度高、耐磨损性好、效应减震、绝缘性好、便于加工等特点,因此塑料注塑成型技术的应用范围越来越广泛,以塑料作为手机后盖的机型也越来越受到厂家和消费者的青睐。然而,普通的塑胶作为手机后盖类的薄壁塑件其综合机械性能依然无法消费者对手机后盖的要求,且普通的塑胶手机后盖极易粘黏污渍,尤其是长期使用过程中手部产生的汗水粘附在手机后盖上,极易滋生细菌。
发明内容
有鉴于此,本发明的目的是提供一种塑料手机后盖的成型工艺,使手机后盖的综合机械性更好,同时具备抗污、自清洁、耐化学药品腐蚀等性能。
本发明通过以下技术手段解决上述技术问题:
一种塑料手机后盖的成型工艺,包括以下工艺步骤:
S1、按7:3的重量比分别取聚碳酸酯和ABS树脂,加入10wt%的纳米Al203,混合均匀后,于90~110℃下干燥2~4h,得到混合原料;
S2、将注塑系统中的料筒加热到230~300℃,并将注塑系统中的热流道加热至50~70℃,将注塑模具中的定模加热至70~90℃,再将混合原料添加到料筒中加热制成熔料,将熔料通过热流道的喷嘴注射到注塑模具中,通过均匀注射进行保压0.5-1.0s,注塑模具的冷流道内通入干燥常温水进行循环冷却,且冷却成型的时间为7-10s,然后趁热脱模,冷却至常温,得到手机后盖;
S3、将手机后盖浸入NaOH和Na3PO4的混合溶液中5~10min,侵泡结束后,先用去离子水冲洗3~5min,再用乙醇溶液冲洗5~10min后干燥备用;通过冲洗能够充分去除手机后盖表面的脱模剂和污渍。
S4、按每升水3mL磷酸、2g草酸、1g钨酸钠、1.5g丙二醇丁醚和1.0~1.5mL质量分数为20%聚四氟乙烯乳液配制混合酸电解液,将经S3处理的手机后盖浸入混合酸电解液中,于120V的电压下室温高压复合阳极氧化1~2h,使手机后盖表面的纳米Al203与聚四氟乙烯反应生成不均匀的Al203/聚四氟乙烯复合氧化膜,然后用去离子水反复冲洗,干燥;
S5、将质量分数为70%的环氧树脂乳液、乙醇和丙酮按2:1:1的体积比混合均匀,得到预混合溶液,然后加入预混合溶液0.5倍重量的聚四氟乙烯,超声溶解分散60min后,加入8wt%的改性微纳米CaCO3粉末,继续超声分散60min,得到复合溶液;
S6、以S4中得到的手机后盖为基材,将复合溶液均匀地喷涂在基材表面,再于40-45℃下充分干燥,使手机后盖的表面形成一层均匀的四氟乙烯/CaCO3复合涂层即可。
聚四氟乙烯(PTFE)作为高分子材料中的低表面能材料,具有很强的疏水性能。在其表面适当增加微纳米双层粗糙结构,可达到超疏水性的效果,超疏水性表面具有抗污、自清洁、耐化学药品腐蚀等优异的特性。四氟乙烯/碳酸钙复合涂层的静态接触角达到159.6°,滚动角为1.7°,具有超疏水性涂层的效果。手机后盖表面不均匀的Al203/聚四氟乙烯复合氧化膜和四氟乙烯/CaCO3复合涂层具有相似相容性,且不均匀的Al203/聚四氟乙烯复合氧化膜能够增大四氟乙烯/CaCO3复合涂层与手机后盖表面的接触面积,能够有效增强四氟乙烯/CaCO3复合涂层的附着力。
进一步,S1中的纳米Al203为改性纳米Al203,其改性方法如下:
取纳米Al203粉放入设定温度为60℃的电热恒温鼓风干燥箱中,恒温干燥6h后,按2g:15mL的料液比加入甲苯中,常温25℃下超声分散40min,使纳米Al203在溶液中分散均匀,然后加入甲苯0.5倍体积的体积分数为10%的硅烷偶联剂甲苯溶液,超声分散10min,再于80℃集热式恒温加热磁力搅拌器中回流反应30min,所得液冷却至室温,离心分离后,再超声分散10min,抽滤,洗涤,得到改性纳米Al203。
纳米Al203改性前团聚严重,存在较多的团聚粒子;改性后硅烷偶联剂接枝在纳米Al203表面,增加了粒子间的位阻,从而使得粒子之间不易团聚,而且分布均匀,有效的改善了使纳米Al203的分散性。成型的手机后盖经过S3的冲洗,能够去除纳米Al203表面的硅烷偶联剂接枝,保证纳米Al203与聚四氟乙烯反应生成Al203/聚四氟乙烯复合氧化膜。
进一步,硅烷偶联剂为硅烷偶联剂KH-570。
进一步,离心分离的条件为:离心转速16000r/min,温度25-35℃,离心时间为20min。
进一步,S5中的改性微纳米CaCO3粉末的制备方法如下:
按1:5的体积比将三甲基甲氧基硅烷和乙醇混合均匀,得到三甲基甲氧基硅烷乙醇溶液,将微纳米CaCO3粉末在不断搅拌的状态下加入10倍重量的乙醇中,超声分散30min后,搅拌条件下缓慢加入三甲基甲氧基硅烷乙醇溶液,再向体系中充入氮气后密封,于50℃下搅拌反应3h,抽滤,滤饼用乙醇冲洗反复冲洗后,于50℃的真空条件下干燥2h,将得到的固体进行粉碎、研磨,即得到改性微纳米CaCO3粉末。
进一步,加入微纳米CaCO3粉末和三甲基甲氧基硅烷乙醇溶液过程的搅拌速度均为180r/min,温度为室温条件下。
进一步,S6中的干燥在真空条件下进行,干燥温度40-45℃,真空度为0.08MPa~0.1MPa,干燥时间1-2h。
本发明的有益效果:本发明通过在聚碳酸酯和ABS树脂中加入纳米Al2O3注塑成型成手机后盖,能够有效增强手机后盖的拉伸强度、韧性和冲击强度,使手机后盖的综合性能达到最佳;并在手机后盖表面形成均匀致密的四氟乙烯/CaCO3复合涂层,复合涂层耐腐蚀性强、膜层硬度高、摩擦系数小,可达到超疏水性的效果,使手机后盖具有抗污、自清洁、耐化学药品腐蚀等优异的特性,防止粘附汗水、灰尘等污渍的粘附,避免细菌滋生,提高手机使用的清洁卫生。
具体实施方式
以下将结合实施例对本发明进行详细说明:
实施例一
一种塑料手机后盖的成型工艺,取纳米Al2O3粉放入设定温度为60℃的电热恒温鼓风干燥箱中,恒温干燥6h后,按2g:15mL的料液比加入甲苯中,常温25℃下超声分散40min,使纳米Al2O3在溶液中分散均匀,然后加入甲苯0.5倍体积的体积分数为10%的硅烷偶联剂KH-570甲苯溶液,超声分散10min,再于80℃集热式恒温加热磁力搅拌器中回流反应30min,所得液冷却至室温,以16000r/min的转速下25℃离心20min,再超声分散10min,抽滤,洗涤,得到改性纳米Al2O3。按7:3的重量比分别取聚碳酸酯和ABS树脂,加入10wt%的纳米Al2O3,混合均匀后,于90℃下干燥2h,得到混合原料。将注塑系统中的料筒加热到230℃,并将注塑系统中的热流道加热至50℃,将注塑模具中的定模加热至70℃,再将混合原料添加到料筒中加热制成熔料,将熔料通过热流道的喷嘴注射到注塑模具中,通过均匀注射进行保压0.5s,注塑模具的冷流道内通入干燥常温水进行循环冷却,且冷却成型的时间为7s,然后趁热脱模,冷却至常温,得到手机后盖;将手机后盖浸入NaOH和Na3PO4的混合溶液中5min,侵泡结束后,先用去离子水冲洗3min,再用乙醇溶液冲洗5min后干燥备用。按每升水3mL磷酸、2g草酸、1g钨酸钠、1.5g丙二醇丁醚和1.0mL质量分数为20%聚四氟乙烯乳液配制混合酸电解液,将经处理的手机后盖浸入混合酸电解液中,于120V的电压下室温高压复合阳极氧化1h,使手机后盖表面的纳米Al203与聚四氟乙烯反应生成不均匀的Al203/聚四氟乙烯复合氧化膜,然后用去离子水反复冲洗,干燥。按1:5的体积比将三甲基甲氧基硅烷和乙醇混合均匀,得到三甲基甲氧基硅烷乙醇溶液,将微纳米CaCO3粉末在室温下于180r/min的搅拌状态下加入10倍重量的乙醇中,超声分散30min后,在室温下于180r/min的搅拌状态下缓慢加入乙醇0.6倍体积的三甲基甲氧基硅烷乙醇溶液,再向体系中充入氮气后密封,于50℃下搅拌反应3h,抽滤,滤饼用乙醇冲洗反复冲洗后,于50℃的真空条件下干燥2h,将得到的固体进行粉碎、研磨,即得到改性微纳米CaCO3粉末;将质量分数为70%的环氧树脂乳液、乙醇和丙酮按2:1:1的体积比混合均匀,得到预混合溶液,然后加入预混合溶液0.5倍重量的聚四氟乙烯,超声溶解分散60min后,加入8wt%的改性微纳米CaCO3粉末,继续超声分散60min,得到复合溶液;以表面生成不均匀的Al203/聚四氟乙烯复合氧化膜的手机后盖为基材,将复合溶液均匀地喷涂在基材表面,于40℃,0.08MPa下真空干燥1h,使手机后盖的表面形成一层均匀的四氟乙烯/碳酸钙复合涂层即可。
实施例二
一种塑料手机后盖的成型工艺,取纳米Al203粉放入设定温度为60℃的电热恒温鼓风干燥箱中,恒温干燥6h后,按2g:15mL的料液比加入甲苯中,常温25℃下超声分散40min,使纳米Al203在溶液中分散均匀,然后加入甲苯0.5倍体积的体积分数为10%的硅烷偶联剂KH-570甲苯溶液,超声分散10min,再于80℃集热式恒温加热磁力搅拌器中回流反应30min,所得液冷却至室温,以16000r/min的转速下30℃离心20min,再超声分散10min,抽滤,洗涤,得到改性纳米Al203。按7:3的重量比分别取聚碳酸酯和ABS树脂,加入10wt%的纳米Al203,混合均匀后,于100℃下干燥3h,得到混合原料。将注塑系统中的料筒加热到250℃,并将注塑系统中的热流道加热至60℃,将注塑模具中的定模加热至80℃,再将混合原料添加到料筒中加热制成熔料,将熔料通过热流道的喷嘴注射到注塑模具中,通过均匀注射进行保压0.7s,注塑模具的冷流道内通入干燥常温水进行循环冷却,且冷却成型的时间为8.7s,然后趁热脱模,冷却至常温,得到手机后盖;将手机后盖浸入NaOH和Na3PO4的混合溶液中7min,侵泡结束后,先用去离子水冲洗4min,再用乙醇溶液冲洗8min后干燥备用。按每升水3mL磷酸、2g草酸、1g钨酸钠、1.5g丙二醇丁醚和1.3mL质量分数为20%聚四氟乙烯乳液配制混合酸电解液,将经处理的手机后盖浸入混合酸电解液中,于120V的电压下室温高压复合阳极氧化1.5h,使手机后盖表面的纳米Al203与聚四氟乙烯反应生成不均匀的Al203/聚四氟乙烯复合氧化膜,然后用去离子水反复冲洗,干燥。按1:5的体积比将三甲基甲氧基硅烷和乙醇混合均匀,得到三甲基甲氧基硅烷乙醇溶液,将微纳米CaCO3粉末在室温下于180r/min的搅拌状态下加入10倍重量的乙醇中,超声分散30min后,在室温下于180r/min的搅拌状态下缓慢加入乙醇0.6倍体积的三甲基甲氧基硅烷乙醇溶液,再向体系中充入氮气后密封,于50℃下搅拌反应3h,抽滤,滤饼用乙醇冲洗反复冲洗后,于50℃的真空条件下干燥2h,将得到的固体进行粉碎、研磨,即得到改性微纳米CaCO3粉末;将质量分数为70%的环氧树脂乳液、乙醇和丙酮按2:1:1的体积比混合均匀,得到预混合溶液,然后加入预混合溶液0.5倍重量的聚四氟乙烯,超声溶解分散60min后,加入8wt%的改性微纳米CaCO3粉末,继续超声分散60min,得到复合溶液;以表面生成不均匀的Al203/聚四氟乙烯复合氧化膜的手机后盖为基材,将复合溶液均匀地喷涂在基材表面,于43℃,0.09MPa下真空干燥1.5h,使手机后盖的表面形成一层均匀的四氟乙烯/碳酸钙复合涂层即可。
实施例三
一种塑料手机后盖的成型工艺,取纳米Al203粉放入设定温度为60℃的电热恒温鼓风干燥箱中,恒温干燥6h后,按2g:15mL的料液比加入甲苯中,常温25℃下超声分散40min,使纳米Al203在溶液中分散均匀,然后加入甲苯0.5倍体积的体积分数为10%的硅烷偶联剂KH-570甲苯溶液,超声分散10min,再于80℃集热式恒温加热磁力搅拌器中回流反应30min,所得液冷却至室温,以16000r/min的转速下35℃离心20min,再超声分散10min,抽滤,洗涤,得到改性纳米Al203。按7:3的重量比分别取聚碳酸酯和ABS树脂,加入10wt%的纳米Al203,混合均匀后,于110℃下干燥4h,得到混合原料。将注塑系统中的料筒加热到300℃,并将注塑系统中的热流道加热至70℃,将注塑模具中的定模加热至90℃,再将混合原料添加到料筒中加热制成熔料,将熔料通过热流道的喷嘴注射到注塑模具中,通过均匀注射进行保压1.0s,注塑模具的冷流道内通入干燥常温水进行循环冷却,且冷却成型的时间为10s,然后趁热脱模,冷却至常温,得到手机后盖;将手机后盖浸入NaOH和Na3PO4的混合溶液中10min,侵泡结束后,先用去离子水冲洗5min,再用乙醇溶液冲洗10min后干燥备用。按每升水3mL磷酸、2g草酸、1g钨酸钠、1.5g丙二醇丁醚和1.5mL质量分数为20%聚四氟乙烯乳液配制混合酸电解液,将经处理的手机后盖浸入混合酸电解液中,于120V的电压下室温高压复合阳极氧化2h,使手机后盖表面的纳米Al203与聚四氟乙烯反应生成不均匀的Al203/聚四氟乙烯复合氧化膜,然后用去离子水反复冲洗,干燥。按1:5的体积比将三甲基甲氧基硅烷和乙醇混合均匀,得到三甲基甲氧基硅烷乙醇溶液,将微纳米CaCO3粉末在室温下于180r/min的搅拌状态下加入10倍重量的乙醇中,超声分散30min后,在室温下于180r/min的搅拌状态下缓慢加入乙醇0.6倍体积的三甲基甲氧基硅烷乙醇溶液,再向体系中充入氮气后密封,于50℃下搅拌反应3h,抽滤,滤饼用乙醇冲洗反复冲洗后,于50℃的真空条件下干燥2h,将得到的固体进行粉碎、研磨,即得到改性微纳米CaCO3粉末;将质量分数为70%的环氧树脂乳液、乙醇和丙酮按2:1:1的体积比混合均匀,得到预混合溶液,然后加入预混合溶液0.5倍重量的聚四氟乙烯,超声溶解分散60min后,加入8wt%的改性微纳米CaCO3粉末,继续超声分散60min,得到复合溶液;以表面生成不均匀的Al203/聚四氟乙烯复合氧化膜的手机后盖为基材,将复合溶液均匀地喷涂在基材表面,于45℃,0.1MPa下真空干燥2h,使手机后盖的表面形成一层均匀的四氟乙烯/碳酸钙复合涂层即可。
实施例四
按7:3的重量比分别取聚碳酸酯和ABS树脂,混合均匀后,于110℃下干燥4h,得到混合原料。将注塑系统中的料筒加热到300℃,并将注塑系统中的热流道加热至70℃,将注塑模具中的定模加热至90℃,再将混合原料添加到料筒中加热制成熔料,将熔料通过热流道的喷嘴注射到注塑模具中,通过均匀注射进行保压1.0s,注塑模具的冷流道内通入干燥常温水进行循环冷却,且冷却成型的时间为10s,然后趁热脱模,冷却至常温,得到手机后盖。
取实施例一至实施例四成型得到的手机后盖,分别制备的10根样条,按照GB/T1043-93和GBT1040.2-2006的标准进行冲击和拉伸性能测试,结果取其平均值,测试结果如表1所示:
表1
实施例 | 冲击强度/(KJ/m<sup>2</sup>) | 拉伸强度/MPa | 断裂伸长率/% |
实施例一 | 79.95 | 23.65 | 153.57 |
实施例二 | 81.54 | 25.61 | 172.46 |
实施例三 | 80.93 | 24.12 | 162.31 |
实施例四 | 48.96 | 12.37 | 79.92 |
由表1数据可知,实施例一至实施例三成型得到的手机后盖的冲击强度均达到80KJ/m2左右,拉伸强度达到23MPa以上,断裂伸长率达到150%以上,各项性能均远远高于实施例四按普通注塑成型的手机后盖。因此本发明的手机后盖的成型工艺能够有效地增强手机后盖的拉伸强度、韧性和冲击强度,使手机后盖的综合性能达到最佳。
分别取实施例一至实施例四成型得到的手机后盖,检测手机后盖表面的膜硬度(HV)、单位时间膜层磨损量(mg/min)和摩擦系数,检测如表2所示:
表2
由表2可知,实施例一至实施例三成型得到的手机后盖表面形成的超疏水性四氟乙烯/碳酸钙复合涂层的膜层的硬度均在1000HV以上,单位时间膜层磨损量均低于0.20mg/min,摩擦系数均低于0.1,与实施例四没有膜层的手机后盖相比,硬度显著提高,单位时间膜层磨损量和摩擦系数显著降低,有效地提高了手机后盖的表面具有抗污、自清洁、耐化学药品腐蚀等性能。
以上实施例仅用以说明本发明的技术方案而非限制,尽管参照较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的宗旨和范围,其均应涵盖在本发明的权利要求范围当中。本发明未详细描述的技术、形状、构造部分均为公知技术。
Claims (7)
1.一种塑料手机后盖的成型工艺,其特征在于,包括以下工艺步骤:
S1、按7:3的重量比分别取聚碳酸酯和ABS树脂,加入10wt%的纳米Al203,混合均匀后,于90~110℃下干燥2~4h,得到混合原料;
S2、将注塑系统中的料筒加热到230~300℃,并将注塑系统中的热流道加热至50~70℃,将注塑模具中的定模加热至70~90℃,再将混合原料添加到料筒中加热制成熔料,将熔料通过热流道的喷嘴注射到注塑模具中,通过均匀注射进行保压0.5-1.0s,注塑模具的冷流道内通入常温水进行循环冷却,且冷却成型的时间为7-10s,然后趁热脱模,冷却至常温,得到手机后盖;
S3、将手机后盖浸入NaOH和Na3PO4的混合溶液中5~10min,浸泡结束后,先用去离子水冲洗3~5min,再用乙醇溶液冲洗5~10min后干燥备用;
S4、按每升水3mL磷酸、2g草酸、1g钨酸钠、1.5g丙二醇丁醚和1.0~1.5mL质量分数为20%聚四氟乙烯乳液配制混合酸电解液,将经S3处理的手机后盖浸入混合酸电解液中,于120V的电压下室温高压复合阳极氧化1~2h,使手机后盖表面的纳米Al203与聚四氟乙烯反应生成不均匀的Al203/聚四氟乙烯复合氧化膜,然后用去离子水反复冲洗,干燥;
S5、将质量分数为70%的环氧树脂乳液、乙醇和丙酮按2:1:1的体积比混合均匀,得到预混合溶液,然后加入预混合溶液0.5倍重量的聚四氟乙烯,超声溶解分散60min后,加入8wt%的改性微纳米CaCO3粉末,继续超声分散60min,得到复合溶液;
S6、以S4中得到的手机后盖为基材,将复合溶液均匀地喷涂在基材表面,充分干燥,使手机后盖的表面形成一层均匀的四氟乙烯/碳酸钙复合涂层即可。
2.根据权利要求1所述的一种塑料手机后盖的成型工艺,其特征在于,S1中所述的纳米Al203为改性纳米Al203,其改性方法如下:
取纳米Al203粉放入设定温度为60℃的电热恒温鼓风干燥箱中,恒温干燥6h后,按2g:15mL的料液比加入甲苯中,常温25℃下超声分散40min,使纳米Al203在溶液中分散均匀,然后加入甲苯0.5倍体积的体积分数为10%的硅烷偶联剂甲苯溶液,超声分散10min,再于80℃集热式恒温加热磁力搅拌器中回流反应30min,所得液冷却至室温,离心分离后,再超声分散10min,抽滤,洗涤,得到改性纳米Al203。
3.根据权利要求2所述的一种塑料手机后盖的成型工艺,其特征在于,所述硅烷偶联剂为硅烷偶联剂KH-570。
4.根据权利要求3所述的一种塑料手机后盖的成型工艺,其特征在于,所述离心分离的条件为:离心转速16000r/min,温度25-35℃,离心时间为20min。
5.根据权利要求4所述的一种塑料手机后盖的成型工艺,其特征在于,S5中所述的改性微纳米CaCO3粉末的制备方法如下:
按1:5的体积比将三甲基甲氧基硅烷和乙醇混合均匀,得到三甲基甲氧基硅烷乙醇溶液,将微纳米CaCO3粉末在不断搅拌的状态下加入10倍重量的乙醇中,超声分散30min后,搅拌条件下缓慢加入乙醇0.6倍体积的三甲基甲氧基硅烷乙醇溶液,再向体系中充入氮气后密封,于50℃下搅拌反应3h,抽滤,滤饼用乙醇冲洗反复冲洗后,于50℃的真空条件下干燥2h,将得到的固体进行粉碎、研磨,即得到改性微纳米CaCO3粉末。
6.根据权利要求5所述的一种塑料手机后盖的成型工艺,其特征在于,加入微纳米CaCO3粉末和三甲基甲氧基硅烷乙醇溶液过程的搅拌速度均为180r/min,温度为室温条件下。
7.根据权利要求1~6任意一项所述的一种塑料手机后盖的成型工艺,其特征在于,S6中所述的干燥在真空条件下进行,干燥温度40-45℃,真空度为0.08MPa~0.1MPa,干燥时间1-2h。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110002185.XA CN113698650B (zh) | 2021-01-04 | 2021-01-04 | 一种塑料手机后盖的成型工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110002185.XA CN113698650B (zh) | 2021-01-04 | 2021-01-04 | 一种塑料手机后盖的成型工艺 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113698650A CN113698650A (zh) | 2021-11-26 |
CN113698650B true CN113698650B (zh) | 2022-10-21 |
Family
ID=78647677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110002185.XA Active CN113698650B (zh) | 2021-01-04 | 2021-01-04 | 一种塑料手机后盖的成型工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113698650B (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007138232A (ja) * | 2005-11-17 | 2007-06-07 | Tajima Seisakusho:Kk | 潤滑皮膜の形成方法。 |
CN105332032A (zh) * | 2015-12-11 | 2016-02-17 | 天津爱田汽车部件有限公司 | 一种铝合金表面耐腐蚀的处理工艺 |
CN106833252A (zh) * | 2016-12-05 | 2017-06-13 | 天长市优信电器设备有限公司 | 一种铝制充电器外壳的耐磨涂层 |
CN106947232A (zh) * | 2017-04-11 | 2017-07-14 | 象山宏祥橡塑制品有限公司 | 一种pc/abs塑料及其制备方法与应用 |
CN107475763A (zh) * | 2017-08-15 | 2017-12-15 | 重庆新久融科技有限公司 | 一种具有自润滑膜层的铝合金模板及其加工方法 |
-
2021
- 2021-01-04 CN CN202110002185.XA patent/CN113698650B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007138232A (ja) * | 2005-11-17 | 2007-06-07 | Tajima Seisakusho:Kk | 潤滑皮膜の形成方法。 |
CN105332032A (zh) * | 2015-12-11 | 2016-02-17 | 天津爱田汽车部件有限公司 | 一种铝合金表面耐腐蚀的处理工艺 |
CN106833252A (zh) * | 2016-12-05 | 2017-06-13 | 天长市优信电器设备有限公司 | 一种铝制充电器外壳的耐磨涂层 |
CN106947232A (zh) * | 2017-04-11 | 2017-07-14 | 象山宏祥橡塑制品有限公司 | 一种pc/abs塑料及其制备方法与应用 |
CN107475763A (zh) * | 2017-08-15 | 2017-12-15 | 重庆新久融科技有限公司 | 一种具有自润滑膜层的铝合金模板及其加工方法 |
Also Published As
Publication number | Publication date |
---|---|
CN113698650A (zh) | 2021-11-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2426168B1 (en) | Imitation metal engineering plastic composite material and preparation method of the same | |
CN103087400B (zh) | 一种木塑复合材料及其制备方法 | |
CN101182127B (zh) | 一种导电填料的制备方法及其应用 | |
CN113999531A (zh) | 一种模具胶及其制备方法 | |
CN104804354B (zh) | 一种免喷涂耐候金属质感asa复合材料及其制备方法 | |
CN110283373A (zh) | 一种热塑磁性复合材料及制备方法 | |
CN113698650B (zh) | 一种塑料手机后盖的成型工艺 | |
CN108948537A (zh) | 具有抗静电功能的汽车内饰件用塑料 | |
CN101891936B (zh) | 基于环氧树脂和膦腈纳米管的复合材料的制备方法 | |
CN107987453A (zh) | 一种注塑级聚丙烯/聚酰胺微发泡复合材料及其制备方法 | |
CN105542474B (zh) | 一种铝镀银导电橡胶板及其制备方法 | |
CN105924800A (zh) | 一种改性ppr及其制备方法 | |
CN115353713B (zh) | 一种电子烟用复合材料及其制备方法 | |
CN109096712B (zh) | 一种聚乳酸-四氧化三铁纳米复合发泡材料及其制备方法 | |
CN110791093B (zh) | 一种非金属电能计量箱用电磁屏蔽、阻燃聚酰亚胺材料及其制备方法 | |
CN114437524B (zh) | 一种甘蔗纤维素基可降解复合材料的制备方法 | |
CN102367361B (zh) | 一种电容器铝壳覆膜涂料及其制备方法 | |
CN108749015A (zh) | 一种高磁导率吸波厚片的制备方法 | |
CN113801420A (zh) | 一种浴缸及其制备工艺 | |
CN114369352A (zh) | 一种高韧导热pc复合材料及其制备方法 | |
CN109135295A (zh) | 一种具有良好稳定导电性能的硅橡胶 | |
CN110776749A (zh) | 一种导热防静电硅胶制品及其微注塑成型工艺 | |
CN108659331A (zh) | 一种车用隔音密封条的制备方法 | |
CN114854210B (zh) | 一种自修复、耐疲劳磁流变硅弹性体的制备方法 | |
CN109385009A (zh) | 一种抗静电pp改性材料 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |