CN108215055A - 一种外壳及其制备方法和电子产品 - Google Patents
一种外壳及其制备方法和电子产品 Download PDFInfo
- Publication number
- CN108215055A CN108215055A CN201611190975.0A CN201611190975A CN108215055A CN 108215055 A CN108215055 A CN 108215055A CN 201611190975 A CN201611190975 A CN 201611190975A CN 108215055 A CN108215055 A CN 108215055A
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- Prior art keywords
- weight
- shell
- metal base
- activator
- glass
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
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- C—CHEMISTRY; METALLURGY
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- 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
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- C—CHEMISTRY; METALLURGY
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- C09J133/00—Adhesives 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
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- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
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Abstract
本发明涉及电子产品技术领域,公开了一种外壳及其制备方法和电子产品,所述外壳包括玻璃盖板、塑胶框体和金属基材边框,所述玻璃盖板、塑胶框体和金属基材边框依次无台阶相结合。所述方法包括:(1)在玻璃盖板的边缘上涂布活化剂,烘干;(2)通过注塑的方式将步骤(1)得到的玻璃盖板与金属基材边框相结合。本发明的外壳中玻璃盖板与金属基材边框之间无缝、无台阶相结合,玻璃与金属基材间的结合力高、碎屏风险低、防水能力强。
Description
技术领域
本发明涉及电子产品技术领域,具体地,涉及一种外壳及其制备方法和电子产品。
背景技术
现有技术中,玻璃前屏和金属基材边框的结合方式基本都是用胶水直接贴合组装,比如,手机屏多是在玻璃与金属基材边框之间放一个塑胶垫圈(软的),通过在玻璃与金属基材边框上涂布胶水,进行组装。因此,玻璃与金属基材边框的结合方式决定了金属基材与玻璃的结合力大小。由该方法制备得到的外壳存在以下几大缺点:(1)玻璃与金属基材间的结合力较小,结合不紧密,有缝隙、不防水、易脱落;(2)基本全部的贴合都没有做到无台阶结合,导致玻璃突出,不但增加了外壳的厚度,同时也增加了碎屏风险;(3)制备工序较多,增加了生产成本,同时也提高了不良率。
发明内容
本发明的目的是为了克服现有技术中的上述缺陷,提供一种外壳及其制备方法和电子产品,该外壳中玻璃盖板与金属基材边框之间无缝、无台阶相结合,玻璃与金属基材间的结合力高、碎屏风险低、防水能力强。
为了实现上述目的,第一方面,本发明提供了一种外壳,所述外壳包括玻璃盖板、塑胶框体和金属基材边框,所述玻璃盖板、塑胶框体和金属基材边框依次无台阶相结合。
第二方面,本发明提供了一种外壳的制备方法,所述方法包括:
(1)在玻璃盖板的边缘上涂布活化剂,烘干;
(2)通过注塑的方式将步骤(1)得到的玻璃盖板与金属基材边框相结合。
第三方面,本发明提供了本发明所述的方法制备得到的外壳。
第四方面,本发明提供了一种电子产品,所述电子产品包括本发明所述的外壳。
本发明的外壳中,玻璃盖板与金属基材间的结合力可高达700N以上(速度10mm/min),且玻璃盖板与金属基材边框之间通过塑胶框体无缝、无台阶相结合(通过注塑的方式,特别是常温注塑,利用塑胶为中间体结合金属基材与玻璃盖板,大大提高了两者间的结合力,且玻璃盖板、塑胶框体和金属基材边框处于同一平面内,三者处于同一高度且依次无台阶相结合),结合力好、碎屏风险低、防水能力强、轻薄、美观、可以作为实用性强的盖板装配外壳,且其制备方法减少了贴屏工序,降低了生产成本,提高了产品良率。
本发明的方法中,通过在玻璃盖板的边缘上涂布活化剂,使得活化剂的活化组分与注塑用的塑胶发生交联反应,能够显著增加塑胶框体与玻璃盖板、塑胶框体与金属基材边框之间的结合力,降低碎屏风险。
本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。
具体实施方式
以下对本发明的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本发明,并不用于限制本发明。
在本文中所披露的范围的端点和任何值都不限于该精确的范围或值,这些范围或值应当理解为包含接近这些范围或值的值。对于数值范围来说,各个范围的端点值之间、各个范围的端点值和单独的点值之间,以及单独的点值之间可以彼此组合而得到一个或多个新的数值范围,这些数值范围应被视为在本文中具体公开。
第一方面,本发明提供了一种外壳,所述外壳包括玻璃盖板、塑胶框体和金属基材边框,所述玻璃盖板、塑胶框体和金属基材边框依次无台阶相结合。
本发明的外壳中,本领域技术人员应该理解的是,玻璃盖板与金属基材边框之间通过塑胶框体无缝、无台阶相结合,具体地,塑胶框体为固化的、硬的塑胶框体,玻璃盖板、塑胶框体和金属基材边框处于同一平面内,三者处于同一高度且依次无台阶相结合。
本发明的外壳中,为了明显提高玻璃盖板与金属基材间的结合力,且明显降低碎屏风险,优选情况下,塑胶框体的材料为聚酰胺(PA)、玻璃纤维(GF)、聚碳酸酯(PC)和聚苯硫醚(PPS)中的至少一种,进一步优选为聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种与玻璃纤维的混合物,更进一步优选为聚酰胺和玻璃纤维的混合物。
其中,优选地,塑胶框体中,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量与玻璃纤维的重量的比值为(0.5-5):1,进一步优选为(1-3):1。本领域技术人员应该理解的是,塑胶框体中含有聚酰胺、聚碳酸酯和聚苯硫醚中的一种时,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量为该一种的重量,塑胶框体中含有聚酰胺、聚碳酸酯和聚苯硫醚中的两种以上时,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量为该两种以上的重量和。本发明中,聚酰胺、玻璃纤维、聚碳酸酯和聚苯硫醚分别为常用的各种聚酰胺、玻璃纤维、聚碳酸酯和聚苯硫醚,均可通过商购获得。
本发明的外壳中,对于金属基材没有特别的限定,可以为本领域常用的各种金属基材,优选情况下,金属基材为不锈钢基材或铝合金基材。
本发明的外壳中,为了进一步提高玻璃盖板与金属基材间的结合力,且明显降低碎屏风险,优选情况下,金属基材边框的表面形成有阳极氧化膜层,且在该阳极氧化膜层的外表层形成有微孔。前述金属基材边框可以通过包括如下处理步骤的方法制备得到:将不锈钢或铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理、微孔处理和贴膜处理。具体的步骤详见后述相应内容。
本发明的外壳中,对于玻璃盖板、塑胶框体和金属基材边框的尺寸没有特别的限定,可以根据实际需求进行相应设计,具体的尺寸设计为本领域技术人员所熟知,在此不再赘述。
第二方面,本发明提供了一种外壳的制备方法,所述方法包括:
(1)在玻璃盖板的边缘上涂布活化剂,烘干;
(2)通过注塑的方式将步骤(1)得到的玻璃盖板与金属基材边框相结合。
本发明的方法中,优选情况下,该方法还包括:步骤(1)中,在涂布活化剂之前,至少在玻璃盖板的边缘上涂布油墨,固化。其中,可以根据外壳的应用情况来确定在玻璃盖板的哪些部位上涂布油墨,例如,如果外壳被用作前屏盖板外壳时,仅仅在玻璃盖板的边缘上涂布油墨,主要起遮蔽ITO电路的作用;如果外壳被用作后屏盖板外壳时,在玻璃盖板的内表面(包括内表面的边缘)上涂布油墨,主要起显示后屏盖板外壳颜色的作用。
本发明的方法中,步骤(1)中,为了提高玻璃盖板与金属基材间的结合力,且降低碎屏风险,优选情况下,玻璃盖板为边缘进行了粗糙化处理的玻璃盖板,以增加其表面粗糙度。粗糙化处理为本领域技术人员所熟知,在此不再赘述。
本发明的方法中,步骤(1)中,对于油墨没有特别的限定,可以为本领域常用的各种油墨,优选情况下,油墨为UV油墨或热固油墨。
其中,步骤(1)中,对于涂布的方式没有特别的限定,可以为能够涂布的任何方式,为了方便生产,优选情况下,涂布油墨的方式为丝印,丝印的油墨的厚度为5-15μm。具体丝印的方法为本领域技术人员所熟知,在此不再赘述。
本发明的方法中,步骤(1)中,为了明显提高玻璃盖板与金属基材间的结合力,且明显降低碎屏风险,优选情况下,活化剂包括活化组分、稀释剂和固化剂,以所述活化剂的重量为基准,所述活化组分的含量为80-94重量%,进一步优选为85-91重量%;所述稀释剂的含量为5-19重量%,进一步优选为6-10重量%;所述固化剂的含量为1-10重量%,进一步优选为3-5重量%。
优选地,所述活化组分为聚氨酯、环氧树脂、聚酰亚胺和聚丙烯酸酯中的至少一种。
优选地,所述稀释剂为丙酮、醋酸乙酯和乙酸乙酯中的至少一种。
优选地,所述固化剂为乙二胺、乙二醇、丙三醇和二亚乙基三胺中的至少一种。
为了进一步提高玻璃盖板与金属基材间的结合力,且进一步降低碎屏风险,优选地,步骤(1)中,涂布的活化剂的厚度为5-15μm。其中,涂布的方式可以为丝印。丝印的方法可以包括:采用300-380目网版,往复印刷两层,具体的操作方法为本领域技术人员所熟知,在此不再赘述。
本发明的方法中,步骤(1)中,对于涂布油墨后进行的固化的条件没有特别的限定,可以根据油墨的种类进行选择,均为本领域常用的各种条件,其中,油墨为UV油墨时,固化的方式为曝光,优选地,曝光条件包括:功率为500-1200kW,时间为1-5min;油墨为热固油墨时,固化的方式为烘干,优选地,烘干的条件包括:温度为80-90℃,时间为50-100min。
本发明的方法中,步骤(1)中,对于涂布活化剂后进行的烘干的条件没有特别的限定,可以为本领域常用的各种条件,优选情况下,烘干的条件包括:温度为75-90℃,时间为40-120min。其中,为了达到最佳效果,烘干后,应尽快注塑,如果储存期越长,要求的注塑温度越高。
本发明的方法中,步骤(2)中,对于金属基材没有特别的限定,可以为本领域常用的各种金属基材,优选情况下,金属基材为不锈钢基材或铝合金基材。
其中,现有技术的金属基材边框一般通过包括如下处理步骤的方法制备得到:将不锈钢或铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理和贴膜处理,为了进一步提高玻璃盖板与金属基材间的结合力,且进一步降低碎屏风险,优选地,金属基材边框通过包括如下处理步骤的方法制备得到:将不锈钢或铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理、微孔处理和贴膜处理(在金属边框上贴膜是为了防止阳极氧化膜被划伤)。其中,在阳极氧化处理后增加微孔前处理,使得阳极氧化膜层的外表层形成微米级的大的腐蚀孔,通过这种腐蚀再造孔,在后续的成型过程中,塑胶材料在注塑过程中会更容易直接进入基材表面孔中,从而在形成塑胶框体后与基材形成良好的结合,能够进一步提高玻璃盖板与金属基材间的结合力。
优选地,微孔处理的方式为:将阳极氧化处理得到的基材浸泡到刻蚀液中,在阳极氧化膜层外表层形成孔径为200nm-2000nm的腐蚀孔。其中,刻蚀液可以为将阳极氧化膜膜层腐蚀的溶液,例如,一般用能溶解氧化铝的溶液调节浓度即可,可以为酸/碱刻蚀液,例如可以选自pH为10-13的溶液。优选情况下可以为pH为10-13的单一碱性溶液或复合缓冲溶液,pH为10-13的单一碱性溶液可以为Na2CO3、NaHCO3、NaOH、K2CO3、KHCO3、KOH等的水溶液,进一步优选为Na2CO3和/或NaHCO3水溶液,能够使腐蚀孔在基材表面均匀分布,并且孔径均匀,能够使玻璃盖板与基材的结合性能更佳。上述刻蚀液的固含量可以为0.1-15重量%。复合缓冲溶液可以为可溶性磷酸氢盐和可溶性碱的混合溶液,例如磷酸二氢钠和氢氧化钠的水溶液,磷酸二氢钠和氢氧化钠的水溶液的固含量可以为0.1-15重量%,也可以为K3PO4和K2HPO4的水溶液,复合缓冲溶液还可以为氨水溶液、肼水溶液、肼衍生物水溶液、水溶性胺系化合物水溶液、NH3-NH4Cl水溶液等。将阳极氧化处理得到的基材浸泡到刻蚀液中包括将基材反复多次浸入刻蚀液中,每次浸渍的时间可以为1-60min,每次浸渍后用去离子水洗净,浸入的次数可以为2到10次。洗净可以是放入水洗槽中清洗1到5min,或者放入水洗槽中放置1到5min。
其中,对于加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理和贴膜处理的方法没有特别限定,可以为本领域常用的各种方法,此均为本领域技术人员所熟知,例如,喷砂处理的条件可以包括:喷砂压强为0.23-0.25MPa,往复2-4次,走速为12-22Hz,其中,可以使用205陶瓷砂,摇摆频率可以为33Hz(机台固定频率)。阳极氧化处理的条件可以包括:电解液中硫酸浓度为10-30重量%,铝离子浓度为10-30g/L;温度为15-25℃,电流密度为0.6-3A/dm2,电压为10-20V,氧化时间为30min-50min。
本发明的方法中,为了进一步提高玻璃盖板与金属基材间的结合力,且进一步降低碎屏风险,优选情况下,该方法还包括:在注塑之前,在金属基材边框的内边缘上涂布活化剂,烘干。
其中,为了明显提高玻璃盖板与金属基材间的结合力,且明显降低碎屏风险,优选情况下,在金属基材边框的内边缘上涂布的活化剂包括活化组分、稀释剂和固化剂,以所述活化剂的重量为基准,所述活化组分的含量为80-94重量%,进一步优选为85-91重量%;所述稀释剂的含量为5-19重量%,进一步优选为6-10重量%;所述固化剂的含量为1-10重量%,进一步优选为3-5重量%。
优选地,所述活化组分为聚氨酯、环氧树脂、聚酰亚胺和聚丙烯酸酯中的至少一种。
优选地,所述稀释剂为丙酮、醋酸乙酯和乙酸乙酯中的至少一种。
优选地,所述固化剂为乙二胺、乙二醇、丙三醇和二亚乙基三胺中的至少一种。
为了进一步提高玻璃盖板与金属基材间的结合力,且进一步降低碎屏风险,优选地,在金属基材边框的边缘上涂布的活化剂的厚度为5-15μm。
其中,对于在金属基材边框的边缘上涂布活化剂后进行的烘干的条件没有特别的限定,可以为本领域常用的各种条件,优选情况下,烘干的条件包括:温度为75-90℃,时间为40-120min。
本发明的方法中,优选情况下,步骤(2)中,注塑的方式为常温注塑,进一步优选地,注塑的条件包括:注塑宽度为0.5-1mm,模具温度为15-35℃,注塑料温度为200-300℃。
本发明的方法中,为了明显提高玻璃盖板与金属基材间的结合力,且明显降低碎屏风险,优选情况下,注塑料为聚酰胺、玻璃纤维、聚碳酸酯和聚苯硫醚中的至少一种,进一步优选为聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种与玻璃纤维的混合物,更进一步优选为聚酰胺和玻璃纤维的混合物。
其中,优选地,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量与玻璃纤维的重量的比值为(0.5-5):1,进一步优选为(1-3):1。本领域技术人员应该理解的是,注塑料中含有聚酰胺、聚碳酸酯和聚苯硫醚中的一种时,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量为该一种的重量,注塑料中含有聚酰胺、聚碳酸酯和聚苯硫醚中的两种以上时,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量为该两种以上的重量和。
本发明的方法中,如前所述,根据本发明的一种优选的实施方式,将玻璃盖板的边缘进行粗糙化处理,同时将金属基材边框进行微孔处理,使其表面形成无数纳米微孔;在处理后的玻璃盖板和金属基材边框上丝印活化剂,再通过常温注塑的方式将玻璃盖板置于金属基材边框内,实现金属基材、塑胶、玻璃盖板无台阶相结合。
其中,优选情况下,玻璃盖板(尤其是外壳作为前屏盖板外壳)为OGS(One GlassSolution同名触板,一块玻璃同时起到保护玻璃和触摸传感器的双重作用)触屏钢化玻璃,降低了产品厚度,突破了注塑温度对触摸屏影响的壁垒,使玻璃盖板与金属基材边框一体化成型,能够减少产品工序,降低成本,提高产品的性能并装饰产品外观,使产品更加轻薄、实用。
本发明的方法中,该方法还包括:在注塑之后将多余的披峰去除。
第三方面,本发明提供了本发明前述方法制备得到的外壳。
第四方面,本发明提供了一种电子产品,所述电子产品包括本发明所述的外壳。
对于电子产品没有特别的限定,只要该电子产品中有玻璃盖板和金属基材边框即可,优选地,所述电子产品为手机、平板电脑、游戏机、手表、笔记本、台式电脑、电视或仪表显示器。
优选地,所述外壳为电子产品的前屏盖板外壳、后屏盖板外壳或防水表壳。进一步优选地,所述外壳可应用于2.5D的前屏,提高产品的装饰效果。
实施例
以下将通过实施例对本发明进行详细描述。以下实施例中,如无特别说明,所用的试剂材料均可通过商购获得,所用的方法均为本领域的常规方法。
聚氨酯购自杜邦公司,牌号为PA66HTN501。
环氧树脂购自杜邦公司,牌号为PKHH。
聚酰亚胺购自杜邦公司,牌号为200H。
聚丙烯酸酯购自广州科泰化工有限公司,牌号为7732-18-5。
聚酰胺购自杜邦公司,牌号为73G20L。
玻璃纤维购自杜邦公司,牌号为FR530NC010。
聚碳酸酯购自杜邦公司,牌号为CG943。
聚苯硫醚购自杜邦,牌号为HTN52G35HSL。
喷砂处理的条件包括:使用205陶瓷砂,喷砂压强为0.24MPa,往复3次,走速为18Hz,摇摆频率33Hz。
实施例1
(1)将OGS触屏钢化玻璃边缘进行粗糙化处理,用70T的网版在玻璃的边缘丝印UV油墨,UV油墨的丝印厚度为10μm,然后在900kW的曝光机下,曝光3min;用380目的网版将活化剂丝印于UV油墨上,活化剂的丝印厚度为10μm,然后将玻璃放入90℃的隧道干燥器中干燥90min;其中,活化剂为聚氨酯体系,包括聚氨酯、丙酮和乙二胺,以所述活化剂的重量为基准,聚氨酯、丙酮和乙二胺的含量分别为88重量%、8重量%和4重量%。
(2)将铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理、微孔处理和贴膜处理,得到铝合金基材边框,然后将与步骤(1)相同的活化剂涂布于铝合金基材边框的内边缘上,涂布厚度为10μm,在80℃烘干90min;其中,阳极氧化处理的条件包括:电解液中硫酸浓度为20重量%,铝离子浓度为20g/L,温度为20℃,电流密度为1.5A/dm2,电压为15V,氧化时间为40min;微孔处理的条件包括:将基材浸泡在pH为12、10重量%的碳酸钠溶液中,5min后将其取出,放入装有水的烧杯中浸泡1min,如此循环5次,最后一次用水浸泡后,烘干;
(3)将注塑料(聚酰胺和玻璃纤维按照重量比2:1进行混合)放入烘箱中预热至250℃,通过常温注塑的方式将步骤(1)得到的玻璃盖板与步骤(2)得到的铝合金基材边框相结合,其中,注塑宽度为0.8mm,模具温度为30℃,注塑料温度为250℃。
(4)将多余的披峰去除,得到外壳产品A1。
实施例2
(1)将OGS触屏钢化玻璃边缘进行粗糙化处理,用70T的网版在玻璃的边缘丝印热固油墨,热固油墨的丝印厚度为15μm,然后在80℃的烘箱中干燥90min;用300目的网版将活化剂丝印于热固油墨上,活化剂的丝印厚度为15μm,然后将玻璃放入80℃的隧道干燥器中干燥110min;其中,活化剂为聚氨酯体系,包括聚氨酯、醋酸乙酯和乙二醇,以所述活化剂的重量为基准,聚氨酯、醋酸乙酯和乙二醇的含量分别为85重量%、10重量%和5重量%。
(2)将铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理、微孔处理和贴膜处理,得到铝合金基材边框,然后将与步骤(1)相同的活化剂涂布于铝合金基材边框的内边缘上,涂布厚度为15μm,在75℃烘干110min;其中,阳极氧化处理的条件包括:电解液中硫酸浓度为15重量%,铝离子浓度为28g/L,温度为15℃,电流密度为1A/dm2,电压为10V,氧化时间为50min;微孔处理的条件包括:将基材浸泡在pH为10、15重量%的碳酸氢钠溶液中,5min后将其取出,放入装有水的烧杯中浸泡1min,如此循环5次,最后一次用水浸泡后,烘干;
(3)将注塑料(聚酰胺和玻璃纤维按照重量比1:1进行混合)放入烘箱中预热至300℃,通过常温注塑的方式将步骤(1)得到的玻璃盖板与步骤(2)得到的铝合金基材边框相结合,其中,注塑宽度为1mm,模具温度为15℃,注塑料温度为300℃。
(4)将多余的披峰去除,得到外壳产品A2。
实施例3
(1)将OGS触屏钢化玻璃边缘进行粗糙化处理,用70T的网版在玻璃的边缘丝印热固油墨,热固油墨的丝印厚度为5μm,然后在90℃的烘箱中干燥60min;用300目的网版将活化剂丝印于热固油墨上,活化剂的丝印厚度为8μm,然后将玻璃放入80℃的隧道干燥器中干燥50min;其中,活化剂为聚氨酯体系,包括聚氨酯、乙酸乙酯和二亚乙基三胺,以所述活化剂的重量为基准,聚氨酯、乙酸乙酯和二亚乙基三胺的含量分别为91重量%、6重量%和3重量%。
(2)将铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理、微孔处理和贴膜处理,得到铝合金基材边框,然后将与步骤(1)相同的活化剂涂布于铝合金基材边框的内边缘上,涂布厚度为5μm,在90℃烘干60min;其中,阳极氧化处理的条件包括:电解液中硫酸浓度为25重量%,铝离子浓度为15g/L,温度为25℃,电流密度为2.5A/dm2,电压为20V,氧化时间为30min;微孔处理的条件包括:将基材浸泡在pH为10、15重量%的碳酸氢钠溶液中,5min后将其取出,放入装有水的烧杯中浸泡1min,如此循环5次,最后一次用水浸泡后,烘干;
(3)将注塑料(聚酰胺和玻璃纤维按照重量比3:1进行混合)放入烘箱中预热至200℃,通过常温注塑的方式将步骤(1)得到的玻璃盖板与步骤(2)得到的铝合金基材边框相结合,其中,注塑宽度为0.5mm,模具温度为35℃,注塑料温度为200℃。
(4)将多余的披峰去除,得到外壳产品A3。
实施例4
按照实施例1的方法制备外壳产品A4,不同的是,活化剂为聚氨酯体系,包括聚氨酯、丙酮和乙二胺,以所述活化剂的重量为基准,聚氨酯、丙酮和乙二胺的含量分别为80重量%、10重量%和10重量%。
实施例5
按照实施例1的方法制备外壳产品A5,不同的是,活化剂中用环氧树脂代替聚氨酯。
实施例6
按照实施例1的方法制备外壳产品A6,不同的是,活化剂中用聚酰亚胺代替聚氨酯。
实施例7
按照实施例1的方法制备外壳产品A7,不同的是,活化剂中用聚丙烯酸酯代替聚氨酯。
实施例8
按照实施例1的方法制备外壳产品A8,不同的是,步骤(2)中,在注塑之前,并不在铝合金基材边框的内边缘上涂布活化剂。
实施例9
按照实施例1的方法制备外壳产品A9,不同的是,制备铝合金基材边框的过程中并不进行微孔处理。
实施例10
按照实施例1的方法制备外壳产品A10,不同的是,注塑料为聚碳酸酯和玻璃纤维按照重量比2:1进行混合。
实施例11
按照实施例1的方法制备外壳产品A11,不同的是,注塑料为聚苯硫醚和玻璃纤维按照重量比2:1进行混合。
实施例12
按照实施例1的方法制备外壳产品A12,不同的是,注塑料为聚酰胺和玻璃纤维按照重量比0.5:1进行混合。
实施例13
按照实施例1的方法制备外壳产品A13,不同的是,注塑料为聚苯硫醚。
实施例14
按照实施例1的方法制备外壳产品A14,不同的是,注塑料为聚酰胺。
实施例15
按照实施例1的方法制备外壳产品A15,不同的是,注塑料为聚碳酸酯。
实施例16
按照实施例1的方法制备外壳产品A16,不同的是,注塑料为玻璃纤维。
对比例1
按照实施例1的方法,不同的是,该方法包括步骤(1)-(3),其中,
步骤(1)为:将OGS触屏钢化玻璃边缘进行粗糙化处理,用70T的网版在玻璃的边缘丝印UV油墨,UV油墨的丝印厚度为10μm,然后在900kW的曝光机下,曝光3min;
步骤(2)为:将铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理和贴膜处理,得到铝合金基材边框;
步骤(3)为:在步骤(1)得到的玻璃盖板与步骤(2)得到的铝合金基材板框之间放一个塑胶垫圈,在玻璃盖板与铝合金基材板框上涂布胶水,将玻璃盖板置于铝合金基材板框中,然后放入90℃干燥箱中烘干30min。得到外壳D1。
试验例
分别对外壳A1-A16和D1进行如下各项性能测试。
1、平面度测试:用三坐标测量机(购自海克斯康,型号为Global classic 050705)测量各外壳的玻璃盖板表面的平面度。结果见表1。
2、镜面推力测试:用万能材料力学试验机(购自INSTRON,型号为3369,推进速度为10mm/min)测试各外壳的玻璃盖板与金属基材边框间的结合力,固定住金属基材边框,推动玻璃盖板直至玻璃破碎或玻璃脱落为止。做30个平行重复,取平均值。结果见表1。
3、将各外壳组装成整机,进行跌落测试:无负载跌落测试,高度1m。经跌落试验后,记录产品未出现变形、压痕和损伤的最大次数。结果见表1。
4、温度冲击测试:将各外壳分别放入温度冲击试验机(购自KSON庆声公司,型号为KSKC-415TBS)中,-40℃放置2h,85℃放置2h,此为1个循环,共做5个循环,然后25℃放置4h,测试前/后无腐蚀、斑点、掉色、变色、裂纹、起泡、扭曲等不良以及不能有手指甲刮伤现象,即为合格。结果见表1。
5、湿热循环测试:将各外壳放于50℃、湿度95%的恒温恒湿箱中72h。测试前/后无腐蚀、斑点、掉色、变色、裂纹、起泡、扭曲等不良以及不能有手指甲刮伤现象,即为合格。结果见表1。
6、盐雾测试:将各外壳放置到盐雾室中,在温度为35℃、湿度为90%条件下,用pH值为6.8、5重量%的NaCl溶液连续对产品表面喷雾2小时,然后将各产品放置于50℃、湿度95%恒温恒湿箱中22小时,此为一个循环,共做3个循环72h。然后使用38℃的温水进行轻柔的冲洗,并用无尘布擦拭干净,常温放置2小时后检查样品,膜层外观无异常、外观无明显变化(如锈蚀、变色及起泡等),即为合格。结果见表1。
7、抗化学品测试:分别将食用油、防晒油、唇膏、粉底液、驱蚊液、护手霜等均匀涂抹于各外壳上,放于温度为70℃、湿度为90%的恒温恒湿箱中24h后,在25℃放置4h,用酒精擦拭产品,无明显残留痕迹,即为合格。结果见表1。
8、防水性能测试:进行IPX7短时浸水试验,将组装好的整机浸入水中30min,工件的顶部水深至少150mm,最下面的部位至少承受1m的水压。拿出水面后,表干工件,放置30min后,可正常工作为合格。结果见表1。
表1
由表1可以看出,本发明的方法能够大大提高制备得到的外壳的玻璃盖板与金属基材板框之间的结合力,大大降低了玻璃脱落风险和摔落后碎屏风险,显著提高了产品性能。
以上详细描述了本发明的优选实施方式,但是,本发明并不限于上述实施方式中的具体细节,在本发明的技术构思范围内,可以对本发明的技术方案进行多种简单变型,这些简单变型均属于本发明的保护范围。
另外需要说明的是,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本发明对各种可能的组合方式不再另行说明。
此外,本发明的各种不同的实施方式之间也可以进行任意组合,只要其不违背本发明的思想,其同样应当视为本发明所公开的内容。
Claims (13)
1.一种外壳,其特征在于,所述外壳包括玻璃盖板、塑胶框体和金属基材边框,所述玻璃盖板、塑胶框体和金属基材边框依次无台阶相结合。
2.根据权利要求1所述的外壳,其中,所述塑胶框体的材料为聚酰胺、玻璃纤维、聚碳酸酯和聚苯硫醚中的至少一种,优选为聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种与玻璃纤维的混合物,进一步优选为聚酰胺和玻璃纤维的混合物,更进一步优选地,塑胶框体中,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量与玻璃纤维的重量的比值为0.5-5:1,再进一步优选为1-3:1。
3.根据权利要求1或2所述的外壳,其中,所述金属基材为不锈钢基材或铝合金基材。
4.根据权利要求1-3中任意一项所述的外壳,其中,所述金属基材边框的表面形成有阳极氧化膜层,且在该阳极氧化膜层的外表层形成有微孔。
5.一种外壳的制备方法,其特征在于,所述方法包括:
(1)在玻璃盖板的边缘上涂布活化剂,烘干;
(2)通过注塑的方式将步骤(1)得到的玻璃盖板与金属基材边框相结合。
6.根据权利要求5所述的方法,其中,该方法还包括:在注塑之前,在金属基材边框的内边缘上涂布活化剂,烘干。
7.根据权利要求5或6所述的方法,其中,该方法还包括:步骤(1)中,在涂布活化剂之前,至少在玻璃盖板的边缘上涂布油墨,固化;
优选地,所述油墨为UV油墨或热固油墨;
优选地,涂布油墨的方式为丝印,丝印的油墨的厚度为5-15μm。
8.根据权利要求5-7中任意一项所述的方法,其中,步骤(1)中,所述活化剂包括活化组分、稀释剂和固化剂,以所述活化剂的重量为基准,所述活化组分的含量为80-94重量%,优选为85-91重量%;所述稀释剂的含量为5-19重量%,优选为6-10重量%;所述固化剂的含量为1-10重量%,优选为3-5重量%;
优选地,所述活化组分为聚氨酯、环氧树脂、聚酰亚胺和聚丙烯酸酯中的至少一种;
优选地,所述稀释剂为丙酮、醋酸乙酯和乙酸乙酯中的至少一种;
优选地,所述固化剂为乙二胺、乙二醇、丙三醇和二亚乙基三胺中的至少一种;
优选地,步骤(1)中,涂布的活化剂的厚度为5-15μm。
9.根据权利要求6所述的方法,其中,在金属基材边框的内边缘上涂布的活化剂包括活化组分、稀释剂和固化剂,以所述活化剂的重量为基准,所述活化组分的含量为80-94重量%,优选为85-91重量%;所述稀释剂的含量为5-19重量%,优选为6-10重量%;所述固化剂的含量为1-10重量%,优选为3-5重量%;
优选地,所述活化组分为聚氨酯、环氧树脂、聚酰亚胺和聚丙烯酸酯中的至少一种;
优选地,所述稀释剂为丙酮、醋酸乙酯和乙酸乙酯中的至少一种;
优选地,所述固化剂为乙二胺、乙二醇、丙三醇和二亚乙基三胺中的至少一种;
优选地,在金属基材边框的内边缘上涂布的活化剂的厚度为5-15μm。
10.根据权利要求5-9中任意一项所述的方法,其中,步骤(2)中,所述金属基材为不锈钢基材或铝合金基材,
优选地,所述金属基材边框通过包括如下处理步骤的方法制备得到:将不锈钢或铝合金依次进行加工成型、打磨、化学抛光、喷砂处理、阳极氧化处理、微孔处理和贴膜处理。
11.根据权利要求5-10中任意一项所述的方法,其中,步骤(2)中,所述注塑的条件包括:注塑宽度为0.5-1mm,模具温度为15-35℃,注塑料温度为200-300℃;
优选地,所述注塑料为聚酰胺、玻璃纤维、聚碳酸酯和聚苯硫醚中的至少一种,更优选为聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种与玻璃纤维的混合物,进一步优选为聚酰胺和玻璃纤维的混合物,更进一步优选地,聚酰胺、聚碳酸酯和聚苯硫醚中的至少一种的总重量与玻璃纤维的重量的比值为0.5-5:1,再进一步优选为1-3:1。
12.权利要求5-11中任意一项所述方法制备得到的外壳。
13.一种电子产品,其特征在于,所述电子产品包括权利要求1-4和12中任意一项所述的外壳;
优选地,所述电子产品为手机、平板电脑、游戏机、手表、笔记本、台式电脑、电视或仪表显示器;
优选地,所述外壳为电子产品的前屏盖板外壳、后屏盖板外壳或防水表壳。
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CN110722749A (zh) * | 2019-10-10 | 2020-01-24 | Oppo广东移动通信有限公司 | 用于制作壳体的模具、壳体及其制作方法、电子设备 |
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