CN108473701A - 构件的表面处理方法及叠层构件的制造方法 - Google Patents

构件的表面处理方法及叠层构件的制造方法 Download PDF

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Publication number
CN108473701A
CN108473701A CN201780007119.3A CN201780007119A CN108473701A CN 108473701 A CN108473701 A CN 108473701A CN 201780007119 A CN201780007119 A CN 201780007119A CN 108473701 A CN108473701 A CN 108473701A
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Prior art keywords
component
dry process
free energy
surface treatment
mentioned
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CN201780007119.3A
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CN108473701B (zh
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阿部爱美
松木裕
松木裕一
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Sika Technology AG
Sika Japan Ltd
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Yokohama Rubber Co Ltd
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Abstract

本发明的目的是提供,能够获得在制成叠层构件时显示优异的粘接性的构件的、构件的表面处理方法以及使用了通过上述表面处理方法进行了处理的构件的叠层构件的制造方法。本发明的表面处理方法是通过干式处理对含有结晶性热塑性树脂的构件的表面进行处理的构件的表面处理方法,其以满足下述条件X和条件Y的方式进行上述干式处理。(条件X)γdd0为1.0以上且小于1.4,(条件Y)γpp0为1.2以上且小于40,这里,γd0为上述干式处理前的上述表面的表面自由能的非极性成分,γd为上述干式处理后的上述表面的表面自由能的非极性成分,γp0为上述干式处理前的上述表面的表面自由能的极性成分,γp为上述干式处理后的上述表面的表面自由能的极性成分。

Description

构件的表面处理方法及叠层构件的制造方法
技术领域
本发明涉及构件的表面处理方法以及叠层构件的制造方法。
背景技术
以往,在汽车的车身、前门、后门(rear door)、后背门(back door)、前保险杠、后保险杠、门槛板镶条(ロッカーモール)等汽车的内外装构件中,使用了钢板,但从实现汽车的轻量化的观点考虑,一部分使用聚丙烯树脂等结晶性热塑性树脂的情况增加。
这样地在汽车的内外装构件使用树脂的情况下,通常,在对树脂构件的粘接面涂布底漆组合物之后涂布粘接剂并进行贴合。
此外,为了省去底漆组合物的涂布工序,也提出了下述方法:对树脂构件的粘接面预先实施火焰处理、电晕处理、等离子体处理、ITRO处理(火焰硅烷处理)等干式处理,然后,直接涂布规定的粘接剂进行贴合从而制造粘接构件(叠层构件)(例如,专利文献1)。
现有技术文献
专利文献
专利文献1:日本特开2014-25000号公报
发明内容
发明所要解决的课题
近来,在对汽车提高安全性、燃耗等的要求水平提高的过程中,也对叠层构件的粘接性(粘接了的构件彼此的粘接性)要求进一步的提高。
其中,本发明人等以专利文献1作为参考,使用进行了干式处理的构件和粘接剂来制造叠层构件,结果明确了其粘接性未必能够令人满意。
因此,本发明鉴于上述实际情况,其目的在于提供,能够获得在制成叠层构件时显示优异的粘接性的构件的、构件的表面处理方法以及使用了通过上述表面处理方法进行了处理的构件的叠层构件的制造方法。
用于解决课题的方法
本发明人等对上述课题进行了深入研究,结果发现,通过对含有结晶性热塑性树脂的构件以满足特定条件的方式进行干式处理,能够解决上述课题。
即,本发明人等发现,通过以下构成能够解决上述课题。
(1)一种构件的表面处理方法,是通过干式处理对含有结晶性热塑性树脂的构件的表面进行处理的构件的表面处理方法,
以满足下述条件X和条件Y的方式进行上述干式处理。
(条件X)γdd0为1.0以上且小于1.4
(条件Y)γpp0为1.2以上且小于40
这里,
γd0为上述干式处理前的上述表面的表面自由能的非极性成分,
γd为上述干式处理后的上述表面的表面自由能的非极性成分,
γp0为上述干式处理前的上述表面的表面自由能的极性成分,
γp为上述干式处理后的上述表面的表面自由能的极性成分。
(2)根据上述(1)所述的构件的表面处理方法,上述干式处理由多次单位干式处理构成,在上述干式处理的全处理过程中,每次增加上述单位干式处理的次数时,进行了上述单位干式处理的上述表面的表面自由能都变大。
(3)一种叠层构件的制造方法,所述叠层构件依次具有含有结晶性热塑性树脂的第1构件、粘接层、和第2构件,所述叠层构件的制造方法具备下述工序:
表面处理工序,对上述第1构件的表面,通过上述(1)或(2)所述的构件的表面处理方法进行表面处理;
粘接剂赋予工序,对上述第1构件的进行了上述表面处理的表面,不介由底漆组合物地赋予粘接剂,在上述第1构件的进行了上述处理的表面形成粘接剂层;以及
贴合工序,在上述粘接剂层上贴合第2构件。
(4)根据上述(3)所述的叠层构件的制造方法,上述第2构件含有结晶性热塑性树脂,
所述制造方法具备下述表面处理工序:在上述贴合工序之前,进一步对上述第2构件的表面,通过上述(1)或(2)所述的构件的表面处理方法进行表面处理,
在上述贴合工序中,在上述粘接剂层上贴合上述第2构件的进行了上述表面处理那侧的表面。
发明效果
如下所示,根据本发明,可以提供能够获得在制成叠层构件时显示优异的粘接性的构件的、构件的表面处理方法、以及使用了通过上述表面处理方法进行了处理的构件的叠层构件的制造方法。
附图说明
图1是按照工序顺序显示本发明的制造方法的一种实施方式的示意性截面图。
具体实施方式
以下,对本发明的构件的表面处理方法以及本发明的叠层构件的制造方法进行说明。
另外,在本说明书中,使用“~”表示的数值范围是指包含“~”的前后所记载的数值作为下限值和上限值的范围。
[构件的表面处理方法]
本发明的构件的表面处理方法(以下,也简称为“本发明的表面处理方法”)是通过干式处理对含有结晶性热塑性树脂的构件的表面进行处理的、构件的表面处理方法。这里,以满足后述的条件X和条件Y的方式进行上述干式处理。
推测本发明的表面处理方法由于采用这样的构成,因此通过本发明的表面处理方法进行了表面处理的构件在制成叠层构件时显示优异的粘接性。其理由不明确,但推测大约如下。
本发明的表面处理方法中,对含有结晶性热塑性树脂的构件的表面,以满足后述的条件X和条件Y(以下也将条件X和条件Y统一称为“特定条件”)的方式进行干式处理,因此可以认为,构件的最表面的结晶性不崩溃,构件的表面被亲水化。因此,在使用通过本发明的表面处理方法进行了表面处理的构件和粘接剂来制造叠层构件的情况下,可以认为,粘接剂融合于被亲水化的构件的表面,形成充分密合于表面整体的粘接剂层,同时,关于由粘接剂层形成的粘接层,构件的最表面的结晶结构成为锚栓,牢固地固定于构件。可以认为,作为结果,所得的叠层构件即使不使用底漆组合物也显示出优异的粘接性。
首先,对本发明的表面处理方法中使用的构件进行说明,然后对干式处理进行详述。
〔构件〕
含有结晶性热塑性树脂的构件(优选为基材)没有特别限制。
上述结晶性热塑性树脂只要是结晶性的热塑性树脂,就没有特别限制,作为其具体例,可举出聚乙烯、聚丙烯、聚丁烯等聚烯烃系树脂;聚甲基丙烯酸甲酯等甲基丙烯酸系树脂;聚苯乙烯、ABS、AS等聚苯乙烯系树脂;聚对苯二甲酸乙二醇酯(PET)、聚对苯二甲酸丁二醇酯(PBT)、聚对苯二甲酸丙二醇酯、聚萘二甲酸乙二醇酯(PEN)、聚对苯二甲酸1,4-环己基二亚甲基酯(PCT)等聚酯系树脂;选自聚己内酰胺(尼龙6)、聚己二酰己二胺(尼龙66)、聚癸二酰己二胺(尼龙610)、聚十二烷二酰己二胺(尼龙612)、聚十二烷酰胺(尼龙12)、聚对苯二甲酰己二胺(尼龙6T)、聚间苯二甲酰己二胺(尼龙6I)、聚己内酰胺/聚对苯二甲酰己二胺共聚物(尼龙6/6T)、聚己二酰己二胺/聚对苯二甲酰己二胺共聚物(尼龙66/6T)、聚己二酰己二胺/聚间苯二甲酰己二胺共聚物(尼龙66/6I)等尼龙树脂和尼龙共聚物树脂中的聚酰胺树脂;聚氯乙烯树脂;多聚甲醛(POM);聚碳酸酯(PC)树脂;聚苯硫醚(PPS)树脂;改性聚亚苯醚(PPE)树脂;聚醚酰亚胺(PEI)树脂;聚砜(PSF)树脂;聚醚砜(PES)树脂;聚酮树脂;聚醚腈(PEN)树脂;聚醚酮(PEK)树脂;聚醚醚酮(PEEK)树脂;聚醚酮酮(PEKK)树脂;聚酰亚胺(PI)树脂;聚酰胺酰亚胺(PAI)树脂;氟树脂;使这些树脂改性而得的改性树脂或这些树脂的混合物等。其中,优选为聚烯烃系树脂,更优选为聚乙烯、聚丙烯,进一步优选为聚丙烯。本发明的表面处理方法中使用的构件可以含有2种以上结晶性热塑性树脂。
本发明的表面处理方法中使用的构件中的结晶性热塑性树脂的含量优选为10~100质量%,更优选为60~100质量%。
本发明的表面处理方法中使用的构件优选为含有结晶性热塑性树脂和无机物的复合构件。作为无机物,可举出例如,二氧化硅、氧化钛、氧化镁、氧化锑、氢氧化铝、氢氧化镁、氢氧化钙、碳酸钙、滑石、粘土、云母、玻璃纤维、炭黑、石墨、碳纤维等。本发明的表面处理方法中使用的构件可以含有2种以上无机物。
〔干式处理〕
干式处理只要是满足后述的条件X和条件Y(特定条件)的干式处理,就没有特别限制。干式处理优选为照射处于等离子体状态的高能量气体的处理。干式处理可以对构件表面的整体进行,也可以对构件表面的一部分进行。在构件为基材的情况下,优选对基材的一个表面进行。
照射处于等离子体状态的高能量气体的干式处理的种类没有特别限制,优选为选自电晕处理、等离子体处理、火焰处理、ITRO处理、UV处理(紫外线照射处理)、和受激准分子处理中的至少1种,更优选为火焰处理、等离子体处理、电晕处理、ITRO处理,进一步优选为火焰处理、等离子体处理。
干式处理可以由1次干式处理(1次过程(pass))(例如,1次扫描)构成,也可以由多次单位干式处理(多次过程)(例如,多次扫描)构成。在干式处理由多次单位干式处理构成的情况下,可以不空开间隔而进行接下来的单位干式处理(连续处理),也可以在单位干式处理后进行构件的放冷、然后进行接下来的单位干式处理(间歇处理)。
在干式处理由多次单位干式处理构成的情况下,从本发明的效果更优异的理由出发,优选在干式处理的全处理过程中,每次增加单位干式处理的次数时,进行了单位干式处理的构件表面的表面自由能(非极性成分+极性成分)都变大。
(火焰处理)
火焰处理是通过火焰(flame)进行表面处理的方法。
火焰处理可以采用使用燃烧器的方法等以往公知的方法。
火焰处理的气体压力优选为0.005~10MPa,更优选为0.01~1.5MPa。
火焰处理的速度优选为100~2000mm/秒,更优选为200~1000mm/秒。
在使用燃烧器进行火焰处理的情况下,燃烧器与构件的表面的距离优选为10~600mm,更优选为20~400mm。
(等离子体处理)
等离子体处理是通过等离子体放电进行表面处理的方法。
等离子体处理没有特别限制,可举出例如,大气压等离子体处理、真空等离子体处理等。
等离子体处理所使用的等离子体气体(工艺气体)没有特别限制,可例示氮气、氦气、氩气等、在这些气体中混合了氧气、二氧化碳气体和氢气中的1种以上而得的混合气体等。
等离子体处理的速度优选为10~1500mm/秒,更优选为50~1000mm/秒。
在使用等离子体放电喷嘴进行等离子体处理的情况下,等离子体放电喷嘴与构件的表面的距离优选为1~100mm,更优选为5~50mm。
(电晕处理)
电晕处理是通过电晕放电进行表面处理的方法。
电晕处理的速度优选为10~1000mm/秒,更优选为20~500mm/秒。
在使用电晕放电喷嘴进行电晕处理的情况下,电晕放电喷嘴与构件的表面的距离优选为1~100mm,更优选为5~50mm。
(ITRO处理)
ITRO处理是在用于形成火焰(flame)的燃料气体中导入硅烷化合物等,使用该火焰对表面实施处理,从而在表面形成纳米级的氧化硅膜,使表面与粘接剂的密合性提高的处理。
ITRO处理的气体压力优选为0.005~10MPa,更优选为0.01~1.5MPa。
ITRO处理的速度优选为100~2000mm/秒,更优选为200~1000mm/秒。
在使用燃烧器进行ITRO处理的情况下,燃烧器与构件的表面的距离优选为10~600mm,更优选为20~400mm。
(条件X和条件Y)
干式处理以满足下述条件X和条件Y的方式进行。
(条件X)γdd0为1.0以上且小于1.4
(条件Y)γpp0为1.2以上且小于40
这里,
γd0为上述干式处理前的构件表面的表面自由能的非极性成分,
γd为上述干式处理后的构件表面的表面自由能的非极性成分,
γp0为上述干式处理前的构件表面的表面自由能的极性成分,
γp为上述干式处理后的构件表面的表面自由能的极性成分。
γdd0优选为1.1~1.3。
γpp0优选为1.5~35。
此外,在干式处理由多次单位干式处理构成的情况下,从本发明的效果更优异的理由出发,优选各单位干式处理后的表面自由能的极性成分满足条件Y,并且,最后的单位干式处理后的表面自由能的极性成分是比最后的单位干式处理前的表面自由能的极性成分大的值。
另外,在干式处理由多次单位干式处理构成的情况下,干式处理后的构件表面的表面自由能是最后的单位干式处理后的构件表面的表面自由能。
接下来,对表面自由能的求法进行说明。
构件的表面(以下也称为“构件表面”)的表面自由能的非极性成分(分散成分)和极性成分可以按照Owens and Wendt法(J.Appl.Polym.Sci.,13,1741-1747(1969).)来求出。
即,在构件表面上滴加表面自由能已知的液体(试验液体),测定接触角,由基于Owens and Wendt解析的计算式(下述式(1)~(3)),算出构件表面的表面自由能的非极性成分和极性成分。
式(1):1+cosθ=2[(γd·γL d)/γL 2]1/2+2[(γp·γL p)/γL 2]1/2
式(2):γ=γdp
式(3):γL=γL dL p
这里,各符号表示以下含义。
·θ:各个试验液体的接触角
·γd:构件表面的表面自由能的非极性成分
·γL d:试验液体的表面自由能的非极性成分
·γp:构件表面的表面自由能的极性成分
·γL p:试验液体的表面自由能的极性成分
本发明中,作为试验液体,使用水和二碘甲烷(methylene iodide)。作为试验液体使用的水和二碘甲烷的表面自由能使用以下数值:水:γL d=21.8mJm-2,γL p=51.0mJm-2,二碘甲烷:γL d=49.5mJm-2,γL p=1.3mJm-2。通过将这些数值导入到上述式(1)~(3)中,将使用了各试验液体的接触角的数值导入到上述式中,可以算出构件表面的表面自由能的非极性成分和极性成分。
此外,上述接触角的测定如下进行:在25℃下将试验液体滴加到构件表面上,使从滴到至测定的等待时间为5秒,通过依照JIS R3257所记载的“静滴法”的θ/2法进行。作为接触角的测定装置,可以使用便携式接触角计(KRUSS社制)。
另外,通过调节干式处理本身的条件(例如,上述速度、距离等),能够进行满足条件X和条件Y的干式处理。
[叠层构件的制造方法]
本发明的叠层构件的制造方法(以下,也简称为“本发明的制造方法”)是制造依次具有含有结晶性热塑性树脂的第1构件、粘接层、和第2构件的叠层构件的叠层构件的制造方法,其具备下述3个工序。
(1)工序1:表面处理工序
对含有结晶性热塑性树脂的第1构件的表面,通过上述本发明的表面处理方法进行表面处理的工序
(2)工序2:粘接剂赋予工序
在上述第1构件的进行了上述表面处理的表面,不介由底漆组合物地赋予粘接剂,在上述第1构件的进行了上述表面处理的表面形成粘接剂层的工序
(3)工序3:贴合工序
在上述粘接剂层上贴合第2构件的工序
首先,使用附图对本发明的制造方法进行说明。
图1是按照工序顺序显示本发明的制造方法的一种实施方式的示意性截面图。
图1(a)表示表面处理工序中使用的第1构件10。
首先,在表面处理工序中,对第1构件10的表面10a,通过本发明的表面处理方法进行表面处理。这样操作而获得表面处理后的第1构件12(图1(b))。
接下来,在粘接剂赋予工序中,对表面处理后的第1构件12的进行了表面处理的表面12a,不介由底漆组合物地赋予粘接剂,在表面12a上形成粘接剂层30(图1(c))。
进而,在贴合工序中,在粘接剂层30上贴合第2构件20。这样操作而获得依次具有第1构件12、粘接层32(粘接剂层30固化而得的层)、和第2构件20的叠层构件100(图1(d))。
以下,对各工序进行详述。
〔工序1:表面处理工序〕
表面处理工序是对含有结晶性热塑性树脂的第1构件的表面,通过上述本发明的表面处理方法进行表面处理的工序。
第1构件的具体例和优选方案与上述本发明的表面处理方法中使用的构件相同。另外,在通过本发明的制造方法制造的叠层构件用作汽车的后背门等汽车用外装构件的情况下,第1构件优选作为内侧的构件(内构件)使用。
关于本发明的表面处理方法,如上所述。
〔工序2:粘接剂赋予工序〕
粘接剂赋予工序是在上述的第1构件的进行了表面处理的表面,不介由底漆组合物地赋予粘接剂,在上述第1构件的进行了表面处理的表面形成粘接剂层的工序。
<粘接剂>
粘接剂没有特别限定,作为其具体例,可举出丙烯酸系粘接剂、橡胶系粘接剂、有机硅系粘接剂、氨基甲酸酯系粘接剂、α-烯烃系粘接剂、醚系粘接剂、乙烯-乙酸乙烯酯树脂系粘接剂、环氧树脂系粘接剂、氯乙烯树脂系粘接剂、氯丁橡胶系粘接剂、氰基丙烯酸酯系粘接剂、水性高分子-异氰酸酯系粘接剂、丁苯橡胶系粘接剂、腈橡胶系粘接剂、硝酸纤维素系粘接剂、反应性热熔系粘接剂、酚树脂系粘接剂、改性有机硅系粘接剂、聚酰胺树脂系粘接剂、聚酰亚胺系粘接剂、聚氨基甲酸酯树脂系粘接剂、聚烯烃树脂系粘接剂、聚乙酸乙烯酯树脂系粘接剂、聚苯乙烯树脂溶剂系粘接剂、聚乙烯醇系粘接剂、聚乙烯吡咯烷酮树脂系粘接剂、聚乙烯醇缩丁醛树脂系粘接剂、聚苯并咪唑系粘接剂、聚甲基丙烯酸酯树脂系粘接剂、三聚氰胺树脂系粘接剂、尿素树脂系粘接剂、间苯二酚系粘接剂等,优选为选自氨基甲酸酯系粘接剂、环氧系粘接剂、改性有机硅系粘接剂、和丙烯酸系粘接剂中的至少1种,更优选为氨基甲酸酯系粘接剂。
氨基甲酸酯系粘接剂和环氧系粘接剂优选为单液型或双液型。
作为单液型氨基甲酸酯系粘接剂,可举出例如包含具有异氰酸酯基的氨基甲酸酯预聚物的湿气固化型粘接剂。
作为双液型氨基甲酸酯系粘接剂,可举出例如,含有包含多元醇的主剂、与包含异氰酸酯的固化剂的粘接剂。
作为单液型环氧系粘接剂,可举出例如包含酮亚胺、唑烷、醛亚胺系化合物等潜在性固化剂与液状环氧树脂的常温固化或加热固化型粘接剂。
作为双液型的环氧树脂系粘接剂,可举出例如,含有选自液状环氧树脂中的主剂(例如,双酚A型环氧树脂、双酚F型环氧树脂、双酚AD型环氧树脂、或酚醛清漆型环氧树脂等)、与固化剂(例如,链状脂肪族胺、环状脂肪族胺或芳香族胺等、咪唑化合物等含氮芳香族等胺系固化剂、酰胺胺固化剂等)的粘接剂。
<赋予方法>
对第1构件的进行了表面处理的表面赋予粘接剂的方法没有特别限定,可举出例如,浸渍涂布法、使用双辊式涂布机、狭缝涂布机、气刀涂布机、线棒式涂布机、滑动料斗、喷涂法、刮板涂布机(blade coater)、刮刀涂布机(doctor coater)、挤压涂布机、逆转辊涂布机、转印辊涂布机、挤出涂布机、帘式涂布机、浸渍涂布机、模涂机、凹版辊的涂覆法、丝网印刷法、浸渍涂布法、喷涂法、旋转涂布法、喷墨法等。
形成的粘接剂层的厚度没有特别限制,优选为0.1~20mm。
〔工序3:贴合工序〕
贴合工序是在上述粘接剂层上贴合第2构件的工序。
这样操作而获得依次具有第1构件、粘接层(粘接剂层固化而得的层)、和第2构件的叠层构件。
<第2构件>
第2构件的材料没有特别限制,可举出树脂、玻璃、金属等。作为树脂,可举出例如,上述结晶性热塑性树脂。
另外,在通过本发明的制造方法制造的叠层构件用作汽车的后背门等汽车用外装构件的情况下,优选第2构件作为外侧的构件(外部构件)使用。
从使第2构件与粘接层的粘接性进一步提高的观点考虑,可以在贴合第2构件之前,对第2构件的表面进行涂装、上述干式处理。
<贴合方法>
在粘接剂层上贴合第2构件的方法没有特别限制,可举出例如,进行压接的方法等。另外,为了使粘接剂固化,可以在贴合第2构件之后进行加热处理等。
在第2构件含有结晶性热塑性树脂的情况下,还优选具备下述表面处理工序:在上述贴合工序之前,进一步对第2构件的表面,通过上述本发明的表面处理方法进行表面处理。另外,贴合工序中,在上述粘接层上贴合第2构件的进行了表面处理那侧的表面。
[用途]
通过本发明的制造方法制造的叠层构件由于粘接性优异,因此对于汽车的车身、前门、后门、后背门、前保险杠、后保险杠、门槛板镶条等汽车的内外装构件特别有用。
实施例
以下通过实施例对本发明进一步详细地进行说明,但本发明不限定于此。
<粘接剂的调制>
使用搅拌机将下述表1的各成分以该表所示的组成(质量份)进行混合,调制出该表上层所示的主剂与该表下层所示的固化剂。
接着,将调制的主剂100g与固化剂10g混合,获得了粘接剂。
表1
表1中的各成分的详细内容如下所述。
·聚合物1:通过下述合成的氨基甲酸酯预聚物
将聚氧丙二醇(平均分子量2000)700g、聚氧丙三醇(平均分子量3000)300g和4,4’-二异氰酸酯基苯基甲烷(分子量250)499g进行混合(此时NCO/OH=2.0),进一步加入邻苯二甲酸二异壬酯500g,在氮气气流中,在80℃进行12小时搅拌,使其反应,合成出含有2.10%的异氰酸酯基的氨基甲酸酯预聚物(聚合物1)。
·化合物1:1,6-己二异氰酸酯的异氰脲酸酯体(TolonateHDT,パーストープ社制)
·化合物2:ダイマロン(萜烯树脂,ヤスハラケミカル社制)
·化合物3:3官能聚丙烯多元醇(エクセノール1030,旭硝子社制)
·化合物4:聚丁二烯二醇(Poly bd R-45HT,出光兴产社制,羟值:0.8mol/kg)
·化合物5:萜品醇(ヤスハラケミカル社制)
·炭黑:#200MP(新日化カーボン社制)
·碳酸钙1:スーパーS(丸尾カルシウム社制)
·碳酸钙2:カルファイン200(丸尾カルシウム社制)
·增塑剂1:邻苯二甲酸二异壬酯(ジェイプラス社制)
·催化剂1:二吗啉代二乙基醚(サンアプロ社制)
<构件的表面处理>
对由聚丙烯复合材料(R-200G,プライムポリマー社制)形成的基材(第1构件)(聚丙烯的含量:80质量%,无机物(玻璃填料)的含量:20质量%)(宽度:25mm,长度:120mm,厚度:3mm)的一个表面,在表2所记载的处理条件下进行干式处理。表2中,“火焰”表示火焰处理,“ITRO”表示ITRO处理,“等离子体”表示等离子体处理,“电晕”表示电晕处理。各处理的详细内容如后所述。另外,比较例1中未进行干式处理。
<叠层构件的制造>
(表面处理工序)
如上所述,对由聚丙烯复合材料形成的基材(第1构件)的一个表面,在表2所记载的处理条件下进行了干式处理。
(粘接剂赋予工序)
接下来,对第1构件的进行了处理的表面赋予如上所述调制的粘接剂,形成了粘接剂层(厚度:3mm)。
(贴合工序)
进而,在粘接剂层上贴合进行了涂装的其它基材(材料:聚丙烯)(宽度:25mm,长度:120mm,厚度:3mm)(第2构件),进行压接,在23℃、相对湿度50%的环境下放置3天。这样操作而获得了具备第1构件、粘接层(粘接剂层固化而得的层)和第2构件的叠层构件。
<粘接性的评价(破坏状态、破坏强度)>
对所得的叠层构件进行剪切试验,目视确认破坏状态,研究粘接剂的凝集破坏(CF)的面积的比例、和界面剥离(AF)的面积的比例。将结果示于表2中(初期、破坏状态)。此外,测定了破坏强度(剪切强度)。将结果示于表2中(初期、破坏强度)。
此外,对所得的叠层构件进行耐热试验(80℃,240小时),进行了同样的评价。将结果示于表2中(耐热老化后)。
这里,“CF数值”表示凝集破坏的面积的比例(%),“AF数值”表示界面剥离的面积的比例(%)。例如,“CF90AF10”表示凝集破坏的面积的比例为90%且界面剥离的面积的比例为10%。
另外,凝集破坏的面积的比例越大,则表示粘接性越优异。实用上,凝集破坏的面积的比例优选为90%以上,更优选为95%以上,进一步优选为100%。
<处理条件>
表2中,关于“处理条件”,如下所述。
(火焰处理)
表2中,关于火焰处理,如下所述。
火焰处理使用燃烧器(气体压力:0.4MPa),在表2所记载的条件(速度、距离、过程次数)下进行。具体而言,通过相对于固定的基材移动燃烧器,来对基材扫描燃烧器(火焰)。
这里,所谓速度,是火焰处理的速度,具体而言,是相对于固定的基材移动燃烧器的速度[mm/秒]。此外,所谓距离,是燃烧器与基材的距离[mm]。此外,所谓过程次数,是单位火焰处理的次数,具体而言,是扫描燃烧器(火焰)的次数。例如,过程次数记载为“1”的是将燃烧器从基材的一端到另一端扫描1次的情况,过程次数记载为“2”的是将燃烧器从基材的一端到另一端扫描1次,然后再一次从另一端到一端扫描燃烧器的情况。
(ITRO处理)
表2中,关于ITRO处理,如下所述。
ITRO处理使用ITRO社制处理装置(气体压力:1.2MPa),在表2所记载的条件(速度、距离、过程次数)下进行。
这里,所谓速度,是ITRO处理的速度,具体而言,是相对于基材移动燃烧器的速度[mm/秒]。此外,所谓距离,是燃烧器与基材的距离[mm]。此外,所谓过程次数,是单位ITRO处理的次数,具体而言,是扫描燃烧器(火焰)的次数。例如,过程次数记载为“1”的是将燃烧器从基材的一端到另一端扫描1次的情况,过程次数记载为“2”的是将燃烧器从基材的一端到另一端扫描1次,然后再一次从另一端到一端扫描燃烧器的情况。
(等离子体处理)
表2中,关于等离子体处理,如下所述。
等离子体处理使用プラズマトリート社制处理装置(气体种类:空气,输出:23kHz),在表2所记载的条件(速度、距离、过程次数)下进行。
这里,所谓速度,是等离子体处理的速度,具体而言,是相对于基材移动等离子体放电喷嘴的速度[mm/秒]。此外,所谓距离,是等离子体放电喷嘴与基材的距离[mm]。此外,所谓过程次数,是单位等离子体处理的次数,具体而言,是扫描等离子体放电喷嘴(等离子体放电)的次数。例如,过程次数记载为“1”的是将等离子体放电喷嘴从基材的一端到另一端扫描1次的情况,过程次数记载为“2”的是将等离子体放电喷嘴从基材的一端到另一端扫描1次,然后再一次从另一端到一端扫描等离子体放电喷嘴的情况。
(电晕处理)
表2中,关于电晕处理,如下所述。
电晕处理使用ナビタス社制处理装置,在表2所记载的条件(速度、距离、过程次数)下进行。
这里,所谓速度,是电晕处理的速度,具体而言,是相对于基材移动电晕放电喷嘴的速度[mm/秒]。此外,所谓距离,是电晕放电喷嘴与基材的距离[mm]。此外,所谓过程次数,是单位电晕处理的次数,具体而言,是扫描电晕放电喷嘴(电晕放电)的次数。例如,过程次数记载为“1”的是将电晕放电喷嘴从基材的一端到另一端扫描1次的情况,过程次数记载为“2”的是将电晕放电喷嘴从基材的一端到另一端扫描1次,然后再一次从另一端到一端扫描电晕放电喷嘴的情况。
<表面自由能>
表2中,关于“各过程中的表面自由能”,如下所述。
·γd1:第1次过程(单位干式处理)后的表面自由能的非极性成分
·γp1:第1次过程(单位干式处理)后的表面自由能的极性成分
·γ1:第1次过程(单位干式处理)后的表面自由能(γd1p1)
·γd2:第2次过程(单位干式处理)后的表面自由能的非极性成分
·γp2:第2次过程(单位干式处理)后的表面自由能的极性成分
·γ2:第2次过程(单位干式处理)后的表面自由能(γd2p2)
·γd3:第3次过程(单位干式处理)后的表面自由能的非极性成分
·γp3:第3次过程(单位干式处理)后的表面自由能的极性成分
·γ3:第3次过程(单位干式处理)后的表面自由能(γd3p3)
另外,比较例1的γd1、γp1、γ1是未进行干式处理的由聚丙烯复合材料(R-200G,プライムポリマー社制)形成的基材本身的值。
表面自由能(非极性成分、极性成分)的求法如上所述。
<γdd0、γpp0
表2中,“γdd0”是在上述条件X下规定的γdd0,“γpp0”是在上述条件Y下规定的γpp0
这里,γd是最后的过程(单位干式处理)后的表面自由能的非极性成分。例如,在实施例1的情况下,过程次数为2,因此γd=γd2。此外,γp是最后的过程(单位干式处理)后的表面自由能的极性成分。例如,在实施例1的情况下,过程次数为2,因此γp=γp2
此外,γd0为干式处理前的表面自由能的非极性成分,因此与比较例1的γd1相同。此外,γp0为干式处理前的表面自由能的极性成分,因此与比较例1的γp1相同。
例如,在实施例1的情况下,γdd0为37.2/28.4=1.3,γpp0为18.0/0.7=25.7。
由第2表可知,通过以满足特定条件的方式进行干式处理的本实施例的表面处理方法进行了表面处理的构件,在制成叠层构件时显示出优异的粘接性。
根据实施例1与实施例2的对比,与在干式处理的全处理过程中、每次增加单位干式处理的次数时、进行了单位干式处理的表面的表面自由能(非极性成分+极性成分)未必变大的实施例2(γ1比γ0大,γ2比γ1大,但γ3不比γ2大)相比,在干式处理的全处理过程中、每次增加单位干式处理的次数时、进行了单位干式处理的表面的表面自由能(非极性成分+极性成分)都变大的实施例1(γ1比γ0大,γ2比γ1大),在耐热试验后显示出更优异的粘接性。
另一方面,通过进行不满足特定条件的干式处理的比较例2~4的表面处理方法而进行了表面处理的构件,在制成叠层构件时粘接性不充分。
符号的说明
10、12 第1构件
10a、12a 第1构件的表面
20 第2构件
30 粘接剂层
32 粘接层
100 叠层构件。

Claims (4)

1.一种构件的表面处理方法,其通过干式处理对含有结晶性热塑性树脂的构件的表面进行处理,
以满足下述条件X和条件Y的方式进行所述干式处理,
条件X:γdd0为1.0以上且小于1.4,
条件Y:γpp0为1.2以上且小于40,
其中,
γd0为所述干式处理前的所述表面的表面自由能的非极性成分,
γd为所述干式处理后的所述表面的表面自由能的非极性成分,
γp0为所述干式处理前的所述表面的表面自由能的极性成分,
γp为所述干式处理后的所述表面的表面自由能的极性成分。
2.根据权利要求1所述的构件的表面处理方法,所述干式处理由多次单位干式处理构成,在所述干式处理的全处理过程中,每次增加所述单位干式处理的次数时,进行了所述单位干式处理的所述表面的表面自由能都变大。
3.一种叠层构件的制造方法,所述叠层构件依次具有含有结晶性热塑性树脂的第1构件、粘接层、和第2构件,所述叠层构件的制造方法具备下述工序:
表面处理工序,对所述第1构件的表面,通过权利要求1或2所述的构件的表面处理方法进行表面处理;
粘接剂赋予工序,对所述第1构件的进行了所述表面处理的表面,不介由底漆组合物地赋予粘接剂,在所述第1构件的进行了所述处理的表面形成粘接剂层;以及
贴合工序,在所述粘接剂层上贴合第2构件。
4.根据权利要求3所述的叠层构件的制造方法,所述第2构件含有结晶性热塑性树脂,
所述制造方法具备下述表面处理工序:在所述贴合工序之前,进一步对所述第2构件的表面,通过权利要求1或2所述的构件的表面处理方法进行表面处理,
在所述贴合工序中,在所述粘接剂层上贴合所述第2构件的进行了所述表面处理那侧的表面。
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