CN115260941B - 一种耐脏污汽车内饰用皮具及其制备方法 - Google Patents
一种耐脏污汽车内饰用皮具及其制备方法 Download PDFInfo
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- CN115260941B CN115260941B CN202211020513.XA CN202211020513A CN115260941B CN 115260941 B CN115260941 B CN 115260941B CN 202211020513 A CN202211020513 A CN 202211020513A CN 115260941 B CN115260941 B CN 115260941B
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Abstract
本发明涉及汽车内饰用皮具的领域,特别涉及一种耐脏污汽车内饰用皮具及其制备方法,主要包括中间层、背面涂覆层和表皮涂覆层;所述表皮涂覆层由表面涂覆剂干燥制得;所述表面涂覆剂包括如下重量份数的原料:水性聚氨酯处理剂40‑90份、交联剂4‑9份、耐磨助剂5‑10份;所述水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照质量比(3‑5):(2‑3):(1‑3)组成;所用交联剂由三羟甲基丙烷和1、4‑丁二醇按照摩尔比(3‑5):(1‑2)组成。本申请具有为了提高汽车内饰用皮具的抗脏污能力的优点。
Description
技术领域
本发明涉及汽车内饰用皮具的领域,特别涉及一种耐脏污汽车内饰用皮具及其制备方法。
背景技术
随着经济的发展与人民生活水平的不断提高,汽车成为了大众出行不可或缺的工具,在人民生活中的应用越来越多;汽车座椅通常采用皮革材质,皮革是由胶原纤维紧密编织而成的,由于胶原纤维中含有大量的氨基、羧基和羟基等基团,这些基团具有一定的亲水性,导致皮革的疏水性较差,易沾染污渍,不易清洗,同时污渍还会侵袭和腐蚀皮革,影响后续的使用;因此提高皮革的耐脏污性能是目前研究的主要方向,同时还需要制备的皮革具有良好的手感、光雾度、颜色、耐磨、耐刮擦和耐黄变的性能。
上述相关技术中,发明人认为:目前制备的汽车内饰用皮具的抗污能力有待提高。
发明内容
为了提高汽车内饰用皮具的抗脏污能力,本申请提供一种耐脏污汽车内饰用皮具及其制备方法。
第一方面,本申请提供的一种耐脏污汽车内饰用皮具,采用如下的技术方案:
一种耐脏污汽车内饰用皮具,主要包括中间层、背面涂覆层和表皮涂覆层;所述表皮涂覆层由表面涂覆剂干燥制得;所述表面涂覆剂包括如下重量份数的原料:水性聚氨酯处理剂40-90份、交联剂4-9份、耐磨助剂5-10份;所述水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照质量比(3-5):(2-3):(1-3)组成;所用交联剂由三羟甲基丙烷和1、4-丁二醇按照摩尔比(3-5):(1-2)组成。
通过采用上述技术方案,水性聚氨酯具有结合力强、耐磨性好、光亮和柔韧性好,易成膜等特点,但是水性聚氨酯的耐热性和耐水性较差,将其作为皮具的表皮涂覆层时,脏污易贴附在皮具表面,使得制备的皮具的抗脏污性能较差;通过将环氧树脂和甲基丙烯酸十二氟庚酯与水性聚氨酯进行配合,在交联剂的作用下,使得水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯互相交联生成网络状结构,提高制备的表面涂覆层的致密度,表面涂覆层在制备的皮具表面形成均匀的无形的保护层,使得皮具表面张力和附着力降低,这样一来,环境中的尘埃、杂质、细小颗粒等污染物无法附着在皮具表面,从而提高了皮具的抗污能力;当皮具表面张力低于水与普通液体时,皮具表面变得疏水,当水或普通液体洒在皮具表面后会在皮具表面形成水珠,就像水在荷叶上形成的荷叶效应般,进而使得污渍不易透过表面涂覆层渗透至皮具内部;由于环氧树脂具有良好的粘结性、还具备高强度和高模量,可以提高制备的表皮涂覆层的耐磨性,同时环氧树脂还具有良好的耐热性能,改善制备的皮具的耐热性和使用寿命;
甲基丙烯酸十二氟庚酯中含有的主要基团为-CF3,-CF3的表面能只有6ml/m2,且-CF3位于甲基丙烯酸十二氟庚酯分子链的外层,因此甲基丙烯酸十二氟庚酯的疏水性和疏油性较好,同时甲基丙烯酸十二氟庚酯具有大体积高支链屏蔽结构,将其添加至表面涂覆剂中后,使得制备的表面涂覆层具有良好的耐水解性、耐水性和耐油性;另外,由于甲基丙烯酸十二氟庚酯分子链长且含有甲基,使得制得的表面涂覆层具有良好的柔韧性和成膜性;因此将水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯复配交联后,可以使得制备的表皮涂覆层具有良好的疏水性、疏油性和致密度,减少污渍的渗透率,提高制备的皮具的耐脏污性。
可选的,所述环氧树脂的环氧值为0.12-0.51。
通过采用上述技术方案,调节环氧树脂的环氧值,当环氧树脂的环氧值较小时,环氧树脂的反应位点较少,固化速率较慢,制备的表皮涂覆层的稳定性较差,但是制备的表皮涂覆层的耐水性较好;当环氧树脂的环氧值过大时,制备的表皮涂覆层发硬发脆,弹性较差,制备的皮具易开裂,影响后续使用;因此通过调节所用环氧树脂的环氧值,使得环氧树脂不仅与水性聚氨酯和甲基丙烯酸十二氟庚酯具有良好的交联固化效果,还使得制备的表皮涂覆层有良好的耐水性和柔韧性,提高制备的皮具的使用性能。
可选的,所述耐磨助剂由伊利石矿粉、三氧化二铝中的至少一种和氧化镧按照质量比(3-5):(1-2)组成。
通过采用上述技术方案,氧化镧中含有稀土离子镧,镧离子具有独特的4f轨道电子结构,将其添加至表皮涂覆层中后,可以诱导表皮涂覆层内网络结构的分子链发生变化,使得硬链段发生结晶,细化结晶的晶粒,镧离子还通过自身的成核作用和配位作用诱导大分子链运动和排布,使得表皮涂覆层内软硬链段分布的更加合理,对表皮涂覆层达到补强增韧的效果;同时镧离子还对水性聚氨酯的固化具有催化作用,提高表皮涂覆剂的固化成膜速率;伊利石矿粉具有天然粒度小、分散性好的特点,还具有良好的抗腐蚀性和耐磨性,对表面涂覆层具有良好的补强效果;纳米三氧化二铝添加至表皮涂覆剂内后,可以在表皮涂覆层的表面形成一层细密、均匀的网状结构,保护表皮涂覆层不被磨损;通过将伊利石矿粉、纳米三氧化二铝中的至少一种和氧化镧进行复配组成耐磨助剂,使得制备的表皮涂覆层不仅具有良好的耐磨性和韧性,还提高表皮涂覆层的致密度,减少污渍的渗透。
可选的,所述耐磨助剂由伊利石矿粉、三氧化二铝和氧化镧按照质量比(1-2):(2-3):(1-2)组成。
通过采用上述技术方案,将伊利石矿粉、三氧化二铝和氧化镧共同复配组成耐磨助剂,通过伊利石矿粉增强制备的表皮涂覆层的强度和耐磨性,三氧化二铝在表皮涂覆层表面形成一层致密的网状结构,进一步对皮具进行防护;氧化镧在增强表皮涂覆层的耐磨性能的同时,还改善表皮涂覆层内软、硬链段的分布,使得制备的表皮涂覆层具有良好的韧性。
可选的,所述三氧化二铝在使用前经过改性处理,所述改性处理包括如下步骤:将三氧化二铝与水混合后,通过超声分散制备成三氧化二铝浆液,然后将γ-氨丙基三乙氧基硅烷添加至三氧化二铝浆液中,升温至70-80℃,搅拌4-5h,抽滤、抽提干燥即得。
通过采用上述技术方案,γ-氨丙基三乙氧基硅烷对三氧化二铝进行改性,超声作用使得三氧化二铝分子不易聚集,提高三氧化二铝与γ-氨丙基三乙氧基硅烷的结合率;γ-氨丙基三乙氧基硅烷可以与三氧化二铝结合形成Al-O-Si键,由于Si的电负性比Al大,吸引电子的倾向更大,使得AI周围的电子密度减少,屏蔽效应减小,电子的结合能增加,使得三氧化二铝与表皮涂覆层中的其他原料结合的更加紧密;本申请中所用γ-氨丙基三乙氧基硅烷与三氧化二铝的摩尔比为1:2。
可选的,所述中间层包括聚氯乙烯发泡体100-250份、稳定剂4-9份和阻燃剂4-7份;所述聚氯乙烯发泡体由聚氯乙烯、发泡剂和成核剂共同组成;所述发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比(3-4):(1-2)组成。
通过采用上述技术方案,聚氯乙烯的耐化学腐蚀性好,同时价格低廉,将其进行发泡处理,可以提高制备的皮具的柔软度,通过将聚氯乙烯与发泡剂和成核剂共同加热,聚氯乙烯在加热熔融后,发泡剂加热分解产生气体,并且在成核剂的作用下,在聚氯乙烯内部产生微细泡孔;偶氮二甲酰胺作为发泡剂,具有发泡量大、分解物无毒、无臭,易分散的优点;邻苯二甲酸二辛酯与聚氯乙烯混合后,邻苯二甲酸二辛酯的分子链可以插入到聚氯乙烯分子链内,使得聚氯乙烯大分子间作用力减弱,另外还可以将聚氯乙烯的极性基团遮蔽起来,减少了聚氯乙烯分子链间的作用力,使得生成的气泡不易聚集,提高中间层内气泡的均匀性和致密性;本申请中所用聚氯乙烯、发泡剂和成核剂的质量比为17:3:4。
可选的,所述成核剂由滑石粉、硅灰石按照质量比(3-4):(2-3)组成。
通过采用上述技术方案,滑石粉中含有氧化镁,氧化镁可以降低偶氮二甲酰胺的发泡分解温度,促进偶氮二甲酰胺的发泡;硅灰石添加至聚氯乙烯内后,填充至聚氯乙烯大分子之间,使得聚氯乙烯大分子之间的距离增大,形成空穴,空穴处的势能降低,气体分子易向空穴处聚集,使得成核所需克服的自由能垒减少,易生成气泡,使得发泡倍率增加;通过调节滑石粉和硅灰石的质量比,当滑石粉的质量过多时,偶氮二甲酰胺的发泡速率过大,气泡易穿破泡孔壁,使得中间层内的发泡均匀性下降;当滑石粉的质量过少时,偶氮二甲酰胺的发泡速率缓慢,中间层内发泡不足,影响后续制备的皮具的使用;通过调节滑石粉和硅灰石的质量比,使得制备的中间层内生成的气泡快速、致密均匀,提高制备的皮具的舒适度。
第二方面,本申请提供的一种耐脏污汽车内饰用皮具的制备方法,采用如下的技术方案:
一种耐脏污汽车内饰用皮具的制备方法,包括如下步骤:
S1:中间层制备:将聚氯乙烯发泡体、稳定剂和阻燃剂共同混合制备成混合料,熔融发泡,压制成型即得;
S2:表皮涂覆剂制备:将水性聚氨酯处理剂、交联剂和耐磨助剂进行混合,在惰性气体下反应3-5h,反应温度为90-130℃,出料即得;
S3:背面涂覆剂制备:所述背面涂覆剂为聚氨酯型热熔胶或者聚烯烃型热熔胶中的任意一种;
S4:将基层布胶粘在中间层的一面上,将表皮涂覆剂涂抹在中间层背离基层布的一面上,待干燥后,形成表皮涂覆层;将背面涂覆剂涂覆在基层布背离中间层的一面上,干燥后形成背面涂覆层,即得。
通过采用上述技术方案,设置基层布,在基层布上设置中间层,在中间层的两侧分别设置表皮涂覆层和背面涂覆层,由于表皮涂覆层在形成的过程中,在交联剂的作用下,水性聚氨酯与环氧树脂和甲基丙烯酸十二氟庚酯交联生成网络状结构,提高制备的表面涂覆层的致密度和耐磨性,使得污渍不易渗透至表面涂覆层内;同时甲基丙烯酸十二氟庚酯为表皮涂覆层带来良好的耐水解性、耐水性和耐油性,进而使得制备的皮具具有优异的低粘附性能,有效的阻止有色物质、灰尘的依附,并且经久耐磨。
可选的,步骤S4中所述表皮涂覆层在形成后,在表皮涂覆层上设置有疏水层,所述疏水层由疏水型二氧化硅和溶剂型聚氨酯按照质量比(1-3):(1-2)组成。
通过采用上述技术方案,将疏水二氧化硅和溶剂型聚氨酯共同混合涂抹至表皮涂覆层后,由于溶剂型聚氨酯具有优异的耐磨性和较好的附着力,同时疏水二氧化硅可以使水渍和油渍与表皮涂覆层的接触角降低,进一步提高皮具的抗污性能;当疏水层干燥后,疏水二氧化硅和溶剂型聚氨酯发生相分离生成“岛状结构”,使得制备的皮具表面粗糙度增加,疏水性增强,通过调节疏水二氧化硅和溶剂型聚氨酯的质量比,在保证皮具疏水性的同时,也使得制备的皮具具有良好的舒适性。
综上所述,本申请具有以下有益效果:
通过将水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯进行复配交联制备成表面涂覆层,通过水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯的互相交联,提高表皮涂覆层的致密度,进而提高皮具的耐磨性,降低污渍渗透率;甲基丙烯酸十二氟庚酯提高皮具表皮涂覆层的疏水疏油性,进一步提高制备的皮具的耐脏污性。
具体实施方式
以下结合实施例对本申请作进一步详细说明;
本申请实施例及对比例的原料除特殊说明以外均为普通市售。
本申请中所述疏水剂的制备方法包括如下步骤:取混合桶,将疏水二氧化硅放置在混合桶内,将聚氨酯加入疏水二氧化硅内,混合即得。
实施例
实施例1
本实施例中的耐脏污汽车内饰用皮具的制备方法包括如下步骤:
S1:中间层制备:取搅拌桶,将100kg聚氯乙烯发泡体、4kg稳定剂、4kg阻燃剂和2kg颜料共同加入搅拌桶内,搅拌均匀后制备成混合料,将混合料加入螺杆挤出机中进行熔融发泡,压制成型即得;所用稳定剂为水杨酸铅;所用阻燃剂为硼酸锌;所用聚氯乙烯发泡体由聚氯乙烯、发泡剂和成核剂按照质量比17:3:4共同组成;所用发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比3:2组成;所用成核剂由滑石粉、硅灰石按照质量比3:3组成;
S2:表皮涂覆剂制备:取混合桶,将40kg水性聚氨酯处理剂、4kg交联剂和5kg耐磨助剂加入混合桶内混合均匀,然后将混合桶进行密封并通入氮气,使得混合桶内的物料在氮气环境内反应4h,混合桶内反应温度设置为110℃,出料即得;所用水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照质量比3:2:1组成;所用交联剂由三羟甲基丙烷和1、4-丁二醇按照摩尔比3:2组成;所用环氧树脂的环氧值为0.12;所用耐磨助剂由伊利石矿粉和氧化镧按照质量比3:2组成;
S3:背面涂覆剂制备:所用背面涂覆层为聚氨酯型热熔胶;
S4:取基层布,将基层布胶粘在中间层的一面上,将表皮涂覆剂涂抹在中间层背离基层布的一面上,待干燥后形成表皮涂覆层,每平方米基层布上涂抹的表皮涂覆剂为50g;将背面涂覆剂涂覆在基层布背离中间层的一面上,干燥后形成背面涂覆层,即得;每平方米基层布上涂抹的背面涂覆剂为50g。
实施例2
本实施例中的耐脏污汽车内饰用皮具的制备方法包括如下步骤:
S1:中间层制备:取搅拌桶,将250kg聚氯乙烯发泡体、9kg稳定剂、7kg阻燃剂和5kg颜料共同加入搅拌桶内,搅拌均匀后制备成混合料,将混合料加入螺杆挤出机中进行熔融发泡,压制成型即得;所用稳定剂为水杨酸铅;所用阻燃剂硼酸锌;所用聚氯乙烯发泡体由聚氯乙烯、发泡剂和成核剂按照质量比17:3:4共同组成;所用发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比3:2组成;所用成核剂由滑石粉、硅灰石按照质量比3:3组成;
S2:表皮涂覆剂制备:取混合桶,将90kg水性聚氨酯处理剂、9kg交联剂和10kg耐磨助剂加入混合桶内混合均匀,然后将混合桶进行密封并通入氮气,使得混合桶内的物料在氮气环境内反应4h,混合桶内反应温度为110℃,出料即得;所用水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照质量比3:2:1组成;所用交联剂由三羟甲基丙烷和1、4-丁二醇按照摩尔比5:1组成;所用环氧树脂的环氧值为0.12;所用耐磨助剂由伊利石矿粉和氧化镧按照质量比3:2组成;
S3:背面涂覆剂制备:所述背面涂覆层为聚氨酯型热熔胶;
S4:取基层布,将基层布胶粘在中间层的一面上,将表皮涂覆剂涂抹在中间层背离基层布的一面上,待干燥后形成表皮涂覆层,每平方米基层布上涂抹的表皮涂覆剂为200g;将背面涂覆剂涂覆在基层布背离中间层的一面上,干燥后形成背面涂覆层,即得;每平方米基层布上涂抹的背面涂覆剂为200g。
实施例3
本实施例中的耐脏污汽车内饰用皮具的制备方法包括如下步骤:
S1:中间层制备:取搅拌桶,将150kg聚氯乙烯发泡体、7kg稳定剂、6kg阻燃剂和3kg颜料共同加入搅拌桶内,搅拌均匀后制备成混合料,将混合料加入螺杆挤出机中进行熔融发泡,压制成型即得;所用稳定剂为水杨酸铅;所用阻燃剂硼酸锌;所用聚氯乙烯发泡体由聚氯乙烯、发泡剂和成核剂按照质量比17:3:4共同组成;所用发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比3:2组成;所用成核剂由滑石粉、硅灰石按照质量比3:3组成;
S2:表皮涂覆剂制备:取混合桶,将60kg水性聚氨酯处理剂、6kg交联剂和7kg耐磨助剂加入混合桶内混合均匀,然后将混合桶进行密封并通入氮气,使得混合桶内的物料在氮气环境内反应4h,混合桶内反应温度为110℃,出料即得;所用水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照质量比3:2:1组成;所用交联剂由三羟甲基丙烷和1、4-丁二醇按照摩尔比4:2组成;所用环氧树脂的环氧值为0.12;所用耐磨助剂由伊利石矿粉和氧化镧按照质量比3:2组成;
S3:背面涂覆剂制备:所述背面涂覆层为聚氨酯型热熔胶;
S4:取基层布,将基层布胶粘在中间层的一面上,将表皮涂覆剂涂抹在中间层背离基层布的一面上,待干燥后形成表皮涂覆层,每平方米基层布上涂抹的表皮涂覆剂为100g;将背面涂覆剂涂覆在基层布背离中间层的一面上,干燥后形成背面涂覆层,即得;每平方米基层布上涂抹的背面涂覆剂为100g。
实施例4
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例3中的不同之处在于,步骤S2中所用水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照质量比5:3:3组成;其余均与实施例3中的相同。
实施例5
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例3中的不同之处在于,步骤S2中所用水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照摩尔比4:2.5:2组成;其余均与实施例3中的相同。
实施例6
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例5中的不同之处在于,步骤S2中所用环氧树脂的环氧值为0.51;其余均与实施例5中的相同。
实施例7
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例5中的不同之处在于,步骤S2中所用环氧树脂的环氧值为0.42;其余均与实施例5中的相同。
实施例8
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例7中的不同之处在于,步骤S2中所用耐磨助剂由伊利石矿粉和氧化镧按照质量比5:1组成;其余均与实施例7中的相同。
实施例9
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例7中的不同之处在于,步骤S2中所用耐磨助剂由伊利石矿粉和氧化镧按照质量比4:1.5组成;其余均与实施例7中的相同。
实施例10
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例7中的不同之处在于,步骤S2中所用耐磨助剂由三氧化二铝和氧化镧按照质量比4:1.5组成;其余均与实施例7中的相同。
实施例11
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例7中的不同之处在于,步骤S2中所用耐磨助剂由伊利石矿粉、三氧化二铝和氧化镧按照质量比1.5:2.5:1.5组成;其余均与实施例7中的相同。
实施例12
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例11中的不同之处在于,步骤S2中所用耐磨助剂由伊利石矿粉、改性三氧化二铝和氧化镧按照质量比1.5:2.5:1.5组成;所用改性三氧化二铝的制备方法包括如下步骤:取搅拌桶,将三氧化二铝与水共同放入搅拌桶内混合,将搅拌桶内物料超声分散20min,制备成三氧化二铝浆液,然后将γ-氨丙基三乙氧基硅烷添加至三氧化二铝浆液中,然后将三氧化二铝浆液在75℃下搅拌4.5h,抽滤、抽提干燥即得;所用γ-氨丙基三乙氧基硅烷与三氧化二铝的摩尔比为1:2;其余均与实施例11中的相同。
实施例13
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例12中的不同之处在于,步骤S1中所用发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比4:1组成;其余均与实施例12中的相同。
实施例14
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例12中的不同之处在于,步骤S1中所用发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比3.5:1.5组成;其余均与实施例12中的相同。
实施例15
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例14中的不同之处在于,步骤S1中所述成核剂由滑石粉、硅灰石按照质量比4:2组成;其余均与实施例14中的相同。
实施例16
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例14中的不同之处在于,步骤S1中所述成核剂由滑石粉、硅灰石按照质量比3.5:2.5组成;其余均与实施例14中的相同。
实施例17
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例16中的不同之处在于,步骤S3中所用背面涂覆剂为聚烯烃型热熔胶,其余均与实施例16中的相同。
实施例18
本实施例中的耐脏污汽车内饰用皮具的制备方法包括如下步骤:
S1:中间层制备:取搅拌桶,将150kg聚氯乙烯发泡体、7kg稳定剂、6kg阻燃剂和3kg颜料共同加入搅拌桶内,搅拌均匀后制备成混合料,将混合料加入螺杆挤出机中进行熔融发泡,压制成型即得;所用稳定剂为水杨酸铅;所用阻燃剂硼酸锌;所用聚氯乙烯发泡体由聚氯乙烯、发泡剂和成核剂按照质量比17:3:4共同组成;所用发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比3.5:1.5组成;所用成核剂由滑石粉、硅灰石按照质量比3.5:2.5组成;
S2:表皮涂覆剂制备:取混合桶,将60kg水性聚氨酯处理剂、6kg交联剂和7kg耐磨助剂加入混合桶内混合均匀,然后将混合桶进行密封并通入氮气,使得混合桶内的物料在氮气环境内反应4h,混合桶内反应温度为110℃,出料即得;所用水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照摩尔比4:2.5:2组成;所用交联剂由三羟甲基丙烷和1、4-丁二醇按照摩尔比4:1.5组成;所用环氧树脂的环氧值为0.42;所用耐磨助剂由伊利石矿粉、三氧化二铝和氧化镧按照质量比1.5:2.5:1.5组成;
S3:背面涂覆剂制备:所述背面涂覆层为聚氨酯型热熔胶;
S4:取基层布,将基层布胶粘在中间层的一面上,将表皮涂覆剂涂抹在中间层背离基层布的一面上,待干燥后形成表皮涂覆层,每平方米基层布上涂抹的表皮涂覆剂为100g;将背面涂覆剂涂覆在基层布背离中间层的一面上,干燥后形成背面涂覆层,即得;每平方米基层布上涂抹的背面涂覆剂为100g;取疏水剂,将疏水剂涂抹至表皮涂覆层背离中间层的一面上,干燥形成疏水层,每平方米涂抹的疏水剂为60g;所用疏水层由疏水型二氧化硅和溶剂型聚氨酯按照质量比1:2组成。
实施例19
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例18中的不同之处在于,步骤S4中所用疏水剂由疏水二氧化硅和溶剂型聚氨酯按照质量比3:1组成;其余均与实施例18中的相同。
实施例20
本实施例的耐脏污汽车内饰用皮具的制备方法与实施例18中的不同之处在于,步骤S4中所用疏水剂由疏水二氧化硅和溶剂型聚氨酯按照质量比2:1.5组成;其余均与实施例18中的相同。
对比例
对比例1
本对比例的耐脏污汽车内饰用皮具的制备方法与实施例1中的不同之处在于,步骤S2中所用水性聚氨酯处理剂为水性聚氨酯,其余均与实施例1中的相同。
对比例2
本对比例的耐脏污汽车内饰用皮具的制备方法与实施例1中的不同之处在于,步骤S2中所用水性聚氨酯处理剂由水性聚氨酯和环氧树脂按照质量比1:1组成,其余均与实施例1中的相同。
对比例3
本对比例的耐脏污汽车内饰用皮具的制备方法与实施例1中的不同之处在于,步骤S2中所用水性聚氨酯处理剂由水性聚氨酯和甲基丙烯酸十二氟庚酯按照质量比1:1组成,其余均与实施例1中的相同。
检测方法
按照实施例1-20与对比例1-3中的耐脏污汽车内饰用皮具的制备方法分别制备出汽车内饰用皮具,通过QBT5253.1-2018《皮革物理和机械试验沾污性能的测定》测试制备的耐脏污汽车内饰用皮具的耐沾污性能,记录数据得到表1;
表1 实施例1-20与对比例1-3中耐脏污汽车内饰用皮具的耐沾污性能测试数据
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结合实施例1-7、对比例1-3和表1可以看出,通过将水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照摩尔比4:2.5:2进行,通过环氧树脂增加制备的表皮涂覆层的致密度,并限定环氧树脂的环氧值,使得污渍不易透过表皮涂覆层进入皮具内;通过添加甲基丙烯酸十二氟庚酯,甲基丙烯酸十二氟庚酯含有表面能较低的-CF3键,使得制备的表皮涂覆层的疏水性和疏油性较好,污渍不易依附在表皮涂覆层中,提高制备的皮具的抗污渍性能;
结合实施例8-12和表1可以看出,通过添加耐磨助剂,在提高表皮涂覆层耐磨性能的同时,还可以提高表皮涂覆层的致密度,使得污渍不易渗透至皮具内,提高制备的皮具的耐污性能;同时对耐磨助剂中的三氧化二铝进行改性,提高三氧化二铝与其他原料结合的紧密度,进一步提高表皮涂覆层的耐磨性和致密度;
结合实施例15-20和表1可以看出,在制备中间层的过程中,通过调节发泡剂的配比,通过将邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比3.5:1.5复配;在邻苯二甲酸二辛酯的作用下,使得偶氮二甲酰胺产生的气泡更加均匀的分布在中间层内,提高中间层内气泡的细密度,进而使得污渍不易渗入发泡层内部,提高皮具的抗污渍性能;并通过将滑石粉、硅灰石按照质量比3.5:2.5组成的成核剂,利用滑石粉降低偶氮二甲酰胺的发泡分解温度,促进偶氮二甲酰胺的发泡;硅灰石提高发泡倍率;
并通过将疏水二氧化硅和溶剂型聚氨酯按照质量比2:1.5组成疏水剂,利用溶剂型聚氨酯对疏水二氧化硅的固定作用,并通过疏水二氧化硅和溶剂型聚氨酯发生相分离生成“岛状结构”,使得制备疏水层表面的粗糙度增加,疏水性增强,进一步提高制备的皮具对污渍的抵抗作用。
按照实施例1-20与对比例1-3中的耐脏污汽车内饰用皮具的制备方法分别制备出汽车内饰用皮具,通过GB/T3903.16-2008《鞋类帮面、衬里和内垫试验方法耐磨性能》测试制备的耐脏污汽车内饰用皮具的耐磨性能,记录数据得到表2;
表2 实施例1-20与对比例1-3中耐脏污汽车内饰用皮具耐磨性能测试
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结合实施例1-12、对比例1-3和表1可以看出,通过添加耐磨助剂,在耐磨助剂由伊利石矿粉、三氧化二铝和氧化镧按照质量比1.5:2.5:1.5组成时,通过伊利石矿粉增强表皮涂覆层的强度和耐磨性,三氧化二铝在表皮涂覆层表面形成一层致密的网状结构,提高表皮涂覆层的耐磨损性能;氧化镧在增强表皮涂覆层的耐磨性能的同时,还改善表皮涂覆层内软、硬链段的分布,使得制备的表皮涂覆层还具有良好的韧性,使得制备的皮具的耐磨性提高;通过对三氧化二铝进行改性,调节γ-氨丙基三乙氧基硅烷与三氧化二铝的质量比,提高三氧化二铝在表皮涂覆层的固定性,使得制备的皮具的耐磨性进一步提高;
结合实施例13-22可以看出,在中间层的制备过程中,添加由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比3.5:1.5组成的发泡剂,并配合由滑石粉、硅灰石按照质量比3.5:2.5组成的成核剂;在滑石粉和硅灰石的配合作用下,提高发泡倍率,使得中间层内生成致密的泡孔结构,提高皮具的耐磨性;并通过在表皮涂覆层设置疏水层,通过溶剂型聚氨酯将疏水二氧化硅进行固定,疏水二氧化硅和聚氨酯弹性体均具有优异的耐磨性,疏水二氧化硅和溶剂型聚氨酯发生相分离生成“岛状结构”使得皮具受到磨损时,疏水二氧化硅最先对抗外力,待疏水二氧化硅磨损到一定程度后,才带动疏水聚氨酯被磨损,进一步提高了制备的皮具的耐磨损性能。
本具体实施例仅仅是对本申请的解释,其并不是对本申请的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改,但只要在本申请的权利要求范围内都受到专利法的保护。
Claims (7)
1.一种耐脏污汽车内饰用皮具,其特征在于:主要包括中间层、背面涂覆层和表皮涂覆层;所述表皮涂覆层由表面涂覆剂干燥制得;所述表面涂覆剂包括如下重量份数的原料:水性聚氨酯处理剂40-90份、交联剂4-9份、耐磨助剂5-10份;所述水性聚氨酯处理剂由水性聚氨酯、环氧树脂和甲基丙烯酸十二氟庚酯按照质量比(3-5):(2-3):(1-3)组成;所用交联剂由三羟甲基丙烷和1,4-丁二醇按照摩尔比(3-5):(1-2)组成;所述耐磨助剂由伊利石矿粉、三氧化二铝和氧化镧按照质量比(1-2):(2-3):(1-2)组成。
2.根据权利要求1所述的耐脏污汽车内饰用皮具,其特征在于:所述环氧树脂的环氧值为0.12-0.51。
3.根据权利要求1所述的耐脏污汽车内饰用皮具,其特征在于:所述三氧化二铝在使用前经过改性处理,所述改性处理包括如下步骤:将三氧化二铝与水混合后,通过超声分散制备成三氧化二铝浆液,然后将γ-氨丙基三乙氧基硅烷添加至三氧化二铝浆液中,升温至70-80℃,搅拌4-5h,抽滤、抽提干燥即得。
4.根据权利要求1所述的耐脏污汽车内饰用皮具,其特征在于:所述中间层包括聚氯乙烯发泡体100-250份、稳定剂4-9份和阻燃剂4-7份;所述聚氯乙烯发泡体由聚氯乙烯、发泡剂和成核剂共同制成;所述发泡剂由邻苯二甲酸二辛酯和偶氮二甲酰胺按照质量比(3-4):(1-2)组成。
5.根据权利要求4所述的耐脏污汽车内饰用皮具,其特征在于:所述成核剂由滑石粉、硅灰石按照质量比(3-4):(2-3)组成。
6.一种根据权利要求1所述的耐脏污汽车内饰用皮具的制备方法,其特征在于:包括如下的步骤:
S1:中间层制备:将聚氯乙烯发泡体、稳定剂和阻燃剂共同混合制备成混合料,熔融发泡,压制成型即得;
S2:表皮涂覆剂制备:将水性聚氨酯处理剂、交联剂和耐磨助剂进行混合,在惰性气体下反应3-5h,反应温度为90-130℃,出料即得;
S3:背面涂覆剂制备:所述背面涂覆剂为聚氨酯型热熔胶或者聚烯烃型热熔胶中的任意一种;
S4:将基层布胶粘在中间层的一面上,将表皮涂覆剂涂抹在中间层背离基层布的一面上,待干燥后,形成表皮涂覆层;将背面涂覆剂涂覆在基层布背离中间层的一面上,干燥后形成背面涂覆层,即得。
7.根据权利要求6所述的耐脏污汽车内饰用皮具的制备方法,其特征在于:步骤S4中所述表皮涂覆层在形成后,在表皮涂覆层上设置有疏水层,所述疏水层由疏水型二氧化硅和溶剂型聚氨酯按照质量比(1-3):(1-2)组成。
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