CN112898680A - 一种电视机后背板及其制备方法 - Google Patents
一种电视机后背板及其制备方法 Download PDFInfo
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- CN112898680A CN112898680A CN202110095583.0A CN202110095583A CN112898680A CN 112898680 A CN112898680 A CN 112898680A CN 202110095583 A CN202110095583 A CN 202110095583A CN 112898680 A CN112898680 A CN 112898680A
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/28—Glass
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- C—CHEMISTRY; METALLURGY
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
一种电视机后背板及其制备方法,包括如下重量份数的物质组成:聚丙烯树脂35‑85份;玻璃纤维0‑15份;玻璃微珠0‑10份;接枝物1‑8份;阻燃剂18‑30份;耐候助剂0.05‑0.8份;润滑助剂0.5‑2份;抗氧助剂0.1‑2份;成核助剂0‑0.1份。本发明制备的电视机后背板阻燃等级高,满足室内安全使用要求;且具有环境友好的特性,满足欧盟ROHS中对禁用物质的要求;同时介电损耗低,信号传输无阻碍,用户交互友好;扩宽了电视机后背板的材料选择范围,价格有较大的优势,能够显著提高产品的成本竞争力。
Description
技术领域
本发明属于电视生产领域,具体地说是一种电视机后背板及其制备方法。
背景技术
电视机背板材料大都采用ABS、HIPS、PC/ABS合金等塑料或者纯金属背板,ABS、HIPS、PC/ABS合金等塑料的背板通常采用注塑成型加工而成,注塑成型加工过程中,ABS、HIPS、PC/ABS合金等为可燃树脂,着火时燃烧速度快,并且放出大量毒气和黑烟,不利于实际应用,而对上述ABS、HIPS塑料进行阻燃改性时,目前系阻燃剂一般为卤素阻燃剂,也易引入铅、汞、镉、六价铬、多溴联苯和多溴联苯醚等有害物质,环保程度较低,同时基材的价格对比也普遍较高;金属背板通常采用冲压加工而成,虽然加工过程很方便,但是纯金属会产生“静电屏蔽”效应,会对智能电视的传输信号的强度产生严重影响,严重影响用户体验,而且金属背板通常采用两种结构,一种是单层金属片结构,该结构由于自身强度不足,为了支撑整个电视机重量而不得不设计很多加强筋,以至于严重影响了电视机的美观,另一种是金属板结构,该结构为了获取好的强度且避免设计加强筋,而导致金属板的厚度较大、质量较重,无法满足对电视机超薄化、质轻的设计需求。
现有电视机背板常用材料中还有一种纯玻璃背板,纯玻璃背板虽然不易燃、具有易加工的特点,还不会产生屏蔽现象,但是纯玻璃背板同样会自重较大,且还易碎,不耐碰撞、跌落及高低温冲击,会降低电视机的使用寿命。
目前市场暂无应用于电视机后背板的对环境友好、价格便宜、强度高、不易碎、阻燃性能高、尺寸稳定性好的聚丙烯阻燃材料。
发明内容
本发明提供一种电视机后背板及其制备方法,用以解决现有技术中的缺陷。
本发明通过以下技术方案予以实现:
一种电视机后背板,包括如下重量份数的物质组成:
如上所述的一种电视机后背板,所述的聚丙烯树脂为均聚聚丙烯树脂或共聚聚丙烯树脂其中的任意一种。
如上所述的一种电视机后背板,所述的玻璃纤维为无碱玻璃纤维、扁平玻璃纤维、石英玻璃纤维其中的任意一种或任意两种以上以任意比例混合的混合物。
如上所述的一种电视机后背板,所述的玻璃微珠为普通玻璃微珠或中空玻璃微珠。
如上所述的一种电视机后背板,所述的玻璃微珠压缩强度≥50Mpa,直径≤100μm,密度为0.2-2.7g/cm3。
如上所述的一种电视机后背板,所述的阻燃剂为膦菲类化合物及其衍生物。
5、根据权利要求4所述的一种电视机后背板,其特征在于:所述的阻燃剂为聚磷酸铵、三聚氰胺、三聚氰胺氰尿酸盐、膨胀石墨、三聚氰胺磷酸盐、硼酸锌、红磷、包括磷酸三甲苯酯、磷酸三苯酯、磷酸三异丙苯酯、磷酸三丁酯、磷酸三辛酯、甲苯基二苯基磷酸酯在内的有机磷系阻燃剂、焦磷哌嗪其中的任意一种或任意两种以上以任意比例混合的混合物。
如上所述的一种电视机后背板,所述的接枝物为酸酐型相容剂、羧酸型相容剂、环氧型相容剂、酰亚胺型相容剂其中的任意一种。
如上所述的一种电视机后背板,所述的耐候助剂为钛白粉、硫化锌、滑石粉、氧化锌、炭黑、锌钡、铁红、苯并三唑类及二苯甲酮类其中的任意一种或任意两种以上以任意比例混合的混合物。
如上所述的一种电视机后背板,所述的润滑剂为含氟润滑剂、含硅润滑剂、PP蜡、改性PP蜡、PE蜡、乙烯丙烯共聚物、硬脂酸类及酰胺类其中的任意一种或任意两种以上以任意比例混合的混合物。
如上所述的一种电视机后背板,所述的抗氧剂为受阻酚类、受阻胺型,磷酸酯类及杂环类抗氧剂其中的任意一种或任意两种以上以任意比例混合的混合物。
如上所述的一种电视机后背板,所述的成核剂为滑石粉、碳酸钙、二氧化硅、明矾、二氧化钛、氧化钙、氧化镁、炭黑、云母等无机成核剂,脂肪羧酸金属化合物、山梨醇苄叉衍生物、芳香族羧酸金属化合物、有机磷酸盐和木质酸及其衍生物类、苯甲酸钠有机成核剂、双(对叔丁基苯甲酸)羧基铝有机成核剂其中的任意一种或任意两种以上以任意比例混合的混合物。
一种电视机后背板的制备方法,包括如下步骤:
步骤一:准确称量聚丙烯树脂、玻璃纤维、玻璃微珠、接枝物、阻燃剂、耐候助剂、润滑助剂、抗氧助剂、成核助剂,并将其充分混合均匀;
步骤二:将混合均匀后的原料造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
如上所述的一种电视机后背板的制备方法,所述的步骤二中使用双螺杆挤出机挤出造粒。
如上所述的一种电视机后背板的制备方法,所述的玻璃纤维选用短切纤维,包括无碱玻璃纤维,石英玻璃纤维等玻璃纤维的短切形式的纤维是采用双螺杆挤出机挤出造粒。为保证得到的材料中纤维的有效长度较长,能够有效控制组分中的玻璃纤维的含量,可以将玻璃纤维通过双螺杆挤出机的侧喂料口加入。
如上所述的一种电视机后背板的制备方法,所述的纤维选择直接纱,所述的直接纱包括无碱玻璃纤维,石英玻璃纤维等玻璃纤维的直接纱形式的纤维时挤出造粒方法采用熔融浸渍包覆工艺,同时,为防止阻燃剂分解,可以采用混配法进行提供。
如上所述的一种电视机后背板的制备方法采用注塑工艺或模压工艺,制得电视机后背板,其中,将制造电视机后背板的材料作为原料,使用注塑工艺,能够得到集成度更高的电视机后背板等。将制作电视后背板的材料作为原料,使用模压工艺,可得到平面度更高,集成度较低的后背板或其他平面占比大的板材。
如上所述的一种电视机后背板的制备方法,所述的聚丙烯树脂称量前进行含水率检测,含水率高于0.05%时对聚丙烯树脂进行干燥,确保投料的聚丙烯树脂的含水率低于0.05%。
本发明的优点是:
1、本发明制备的电视机后背板阻燃等级高,满足室内安全使用要求;且具有环境友好的特性,满足欧盟ROHS中对禁用物质的要求;同时介电损耗低,信号传输无阻碍,用户交互友好;扩宽了电视机后背板的材料选择范围,价格有较大的优势,能够显著提高产品的成本竞争力。
2、本发明制造该电视后背板的材料是一种玻纤增强阻燃聚丙烯复合材料,密度较小,制造该背板的材料组分包括树脂基体、玻璃纤维、中空玻璃微球、阻燃剂、接枝物、耐候助剂、润滑助剂、抗氧助剂和成核助剂。其中,组分中的聚丙烯树脂基体具有良好的耐热性能且介电损耗低,能够保证材料有较好的透波性及耐热性,组分中的玻璃纤维能够起到增强材料物理性能的效果,同时使该材料与现用树脂材料收缩率一致,可使用现行模具,降低材料的热膨胀系数,并提高材料的热变相温度,提高使用寿命。组分中的玻璃微球,可降低材料介电损耗,改善材料的表观质量,同时可进一步的降低材料的密度。组分中的阻燃剂对材料进行阻燃改善,提高材料的阻燃性能,可达到UL94-2.0mm-V0标准。组分中的接枝物能够改善材料基本性能,并进一步改善材料表观质量。组分中的耐候助剂、抗氧助剂能够减缓制件的老化,延长后背板的使用寿命。润滑助剂能够改善材料的流动性,提高纤维的分散效果,提高后背板质量。成核助剂能降低材料的后收缩,改善材料收缩过程的翘曲,提高制件的平整度。本电视机后背板采用的为玻纤增强阻燃PP,为绿色环保材料,可回收循环利用,对环境友好。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1是本发明制备的电视机后背板的图片;
图2是本发明制备产品的尺寸收缩性能检测报告;
图3是本发明的公司内制备标准之一;
图4是本发明的公司内制备标准之二。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
步骤一:准确称量均聚聚丙烯65kg,中空玻璃微珠10kg,聚磷酸铵20kg,马来酸酐接枝PP3.0kg,钛白粉0.5kg,含氟润滑剂0.5kg,1010-0.5kg,纳米滑石粉0.05kg,并将其充分混合均匀;
步骤二:将混合均匀后的原料通过双螺杆挤出造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
制得的电视机后背板:密度为1.04g/cm3,介电损耗为0.0027,热变形温度为120℃,阻燃等级为UL94-2.0mm-V0,符合ROHS标准要求。所制得材料满足注塑工艺及模压工艺使用。
实施例2
步骤一:准确称量均聚聚丙烯55kg,玻璃纤维5kg,玻璃微珠5kg,马来酸接枝PP3.0kg,聚磷酸铵30kg,硫化锌0.5kg,PP蜡0.5kg,DLTP-0.5kg,纳米碳酸钙0.5kg,并将其充分混合均匀;
步骤二:将混合均匀后的原料通过双螺杆挤出造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
制得的电视机后背板:密度为1.08g/cm3,介电损耗为0.0026,热变形温度为115℃,阻燃等级为UL94-2.0mm-V0,符合ROHS标准要求。所制得材料满足注塑工艺及模压工艺使用。
实施例3
步骤一:准确称量均聚聚丙烯50kg,玻璃纤维15kg,玻璃微珠1kg,马来酸酐接枝PP3.0kg,三聚氰胺尿酸盐30kg,二苯甲酮0.5kg,PP蜡0.5kg,DLTP-0.5kg,纳米碳酸钙0.5kg,并将其充分混合均匀;
步骤二:将混合均匀后的原料通过双螺杆挤出造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
制得的电视机后背板:密度为1.13g/cm3,介电损耗为0.0026,热变形温度为135℃,阻燃等级为UL94-2.0mm-V0,符合ROHS标准要求。所制得材料满足注塑工艺及模压工艺使用。
实施例4
步骤一:准确称量共聚聚丙烯55kg,玻璃纤维5kg,玻璃微珠5kg,DOPO-30kg,马来酸接枝PP3.0kg,硫化锌0.5kg,PP蜡0.5kg,DLTP-0.5kg,纳米碳酸钙0.5kg,并将其充分混合均匀;
步骤二:将混合均匀后的原料通过双螺杆挤出造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
制得的电视机后背板:密度为1.08g/cm3,介电损耗为0.0024,热变形温度为118℃,阻燃等级为UL94-2.0mm-V0,符合ROHS标准要求。所制得材料满足注塑工艺及模压工艺使用。
实施例5
步骤一:准确称量共聚聚丙烯35kg,玻璃纤维15kg,玻璃微珠10kg,三聚氰胺磷酸盐27kg,马来酸接枝PP8.0kg,苯并三唑0.5kg,芥酸酰胺0.5kg,磷酸酯盐-0.5kg,LNP-20E-0.05kg,并将其充分混合均匀;
步骤二:将混合均匀后的原料通过双螺杆挤出造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
制得的电视机后背板:密度为1.18g/cm3,介电损耗为0.0023,热变形温度为135℃,阻燃等级为UL94-2.0mm-V0,符合ROHS标准要求。所制得材料满足注塑工艺及模压工艺使用。
实施例6
步骤一:准确称量共聚聚丙烯75kg,玻璃纤维3kg,马来酸接枝PP1.0kg,焦磷哌嗪21kg,三氧化二锑0.1kg,芥酸酰胺0.1kg,磷酸酯盐0.1kg,并将其充分混合均匀;
步骤二:将混合均匀后的原料通过双螺杆挤出造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
制得的电视机后背板:密度为0.99g/cm3,介电损耗为0.0029,热变形温度为108℃,阻燃等级为UL94-2.0mm-V0,符合ROHS标准要求。所制得材料满足注塑工艺及模压工艺使用。
实施例7
步骤一:准确称量均聚聚丙烯50kg,玻璃纤维15kg,马来酸酐3kg,焦磷哌嗪30kg,硫化锌0.5kg,1010-0.5kg,168-0.5kg,油酸酰胺0.5kg,有机磷酸钠盐0.05kg,并将其充分混合均匀;
步骤二:将混合均匀后的原料熔融浸渍包覆工艺造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
制得的电视机后背板:密度为1.16g/cm3,介电损耗为0.0028,热变形温度为135℃,阻燃等级为UL94-2.0mm-V0,符合ROHS标准要求。所制得材料满足注塑工艺及模压工艺使用。
实施例1-7中提供的电视机后背板的密度均小于1.5g/cm3,使值得的后背板更轻,同时阻燃等级均能达到UL94-2.0mm-V0的阻燃要求,同时通过图2可知本发明制备的电视机后背板尺寸收缩性能符合标准,而且该体系均采用的为无卤阻燃体系,燃烧过程不产生卤系元素,环境友好,能够多次回收利用,避免了对环境的污染;同时材料的介电损耗低,可以更好的使信号波传递,交互友好。
最后应说明的是:以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。
Claims (9)
2.根据权利要求1所述的一种电视机后背板,其特征在于:
所述的聚丙烯树脂为均聚聚丙烯树脂或共聚聚丙烯树脂其中的任意一种;
所述的玻璃纤维为无碱玻璃纤维、扁平玻璃纤维、石英玻璃纤维其中的任意一种或任意两种以上以任意比例混合的混合物;
所述的玻璃微珠为普通玻璃微珠或中空玻璃微珠。
3.根据权利要求2所述的一种电视机后背板,其特征在于:所述的玻璃微珠压缩强度≥50Mpa,直径≤100μm,密度为0.2-2.7g/cm3。
4.根据权利要求1所述的一种电视机后背板,其特征在于:所述的阻燃剂为膦菲类化合物及其衍生物。
5.根据权利要求4所述的一种电视机后背板,其特征在于:所述的阻燃剂为聚磷酸铵、三聚氰胺、三聚氰胺氰尿酸盐、膨胀石墨、三聚氰胺磷酸盐、硼酸锌、红磷、包括磷酸三甲苯酯、磷酸三苯酯、磷酸三异丙苯酯、磷酸三丁酯、磷酸三辛酯、甲苯基二苯基磷酸酯在内的有机磷系阻燃剂、焦磷哌嗪其中的任意一种或任意两种以上以任意比例混合的混合物。
6.根据权利要求1所述的一种电视机后背板,其特征在于:
所述的接枝物为酸酐型相容剂、羧酸型相容剂、环氧型相容剂、酰亚胺型相容剂其中的任意一种;
所述的耐候助剂为钛白粉、硫化锌、滑石粉、氧化锌、炭黑、锌钡、铁红、苯并三唑类及二苯甲酮类其中的任意一种或任意两种以上以任意比例混合的混合物;
所述的润滑剂为含氟润滑剂、含硅润滑剂、PP蜡、改性PP蜡、PE蜡、乙烯丙烯共聚物、硬脂酸类及酰胺类其中的任意一种或任意两种以上以任意比例混合的混合物;
所述的抗氧剂为受阻酚类、受阻胺型,磷酸酯类及杂环类抗氧剂其中的任意一种或任意两种以上以任意比例混合的混合物;
所述的成核剂为滑石粉、碳酸钙、二氧化硅、明矾、二氧化钛、氧化钙、氧化镁、炭黑、云母等无机成核剂,脂肪羧酸金属化合物、山梨醇苄叉衍生物、芳香族羧酸金属化合物、有机磷酸盐和木质酸及其衍生物类、苯甲酸钠有机成核剂、双(对叔丁基苯甲酸)羧基铝有机成核剂其中的任意一种或任意两种以上以任意比例混合的混合物。
7.一种电视机后背板的制备方法,其特征在于:包括如下步骤:
步骤一:准确称量聚丙烯树脂、玻璃纤维、玻璃微珠、接枝物、阻燃剂、耐候助剂、润滑助剂、抗氧助剂、成核助剂,并将其充分混合均匀;
步骤二:将混合均匀后的原料造粒,得到制备电视机后背板的原料粒;
步骤三:将步骤二所得的原料粒采用注塑工艺或模压工艺制备得电视机后背板。
8.根据权利要求7所述的一种电视机后背板的制备方法,其特征在于:所述的纤维选择直接纱,挤出造粒方法采用熔融浸渍包覆工艺。
9.根据权利要求7所述的一种电视机后背板的制备方法,其特征在于:所述的聚丙烯树脂称量前进行含水率检测,含水率高于0.05%时对聚丙烯树脂进行干燥,确保投料的聚丙烯树脂的含水率低于0.05%。
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