CN114829498B - 激光熔接用成型品、激光熔接用成型品的激光透射率的偏差抑制剂 - Google Patents

激光熔接用成型品、激光熔接用成型品的激光透射率的偏差抑制剂 Download PDF

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CN114829498B
CN114829498B CN202080087145.3A CN202080087145A CN114829498B CN 114829498 B CN114829498 B CN 114829498B CN 202080087145 A CN202080087145 A CN 202080087145A CN 114829498 B CN114829498 B CN 114829498B
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molded article
polybutylene terephthalate
laser welding
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terephthalate resin
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CN114829498A (zh
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矶村孝人
五岛一也
坂田耕一
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Polyplastics Co Ltd
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    • C08L67/00Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
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    • B29C65/16Laser beams
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    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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Abstract

[课题]本发明的课题在于,提供:可见光透射率和激光透射率优异、也可抑制激光透射率的偏差的激光熔接用成型品、激光熔接用成型品的激光透射率的偏差抑制剂。[解决方案]可以通过激光熔接用成型品、含有环氧系化合物的激光熔接用成型品的激光透射率的偏差抑制剂来解决上述课题,所述激光熔接用成型品是由含有(A)聚对苯二甲酸丁二醇酯树脂100质量份、(B)300℃、剪切速度1000秒‑1下的熔融粘度为0.20kPa·s以上的聚碳酸酯树脂、和1质量份以上且10质量份以下的(C)环氧系化合物的聚对苯二甲酸丁二醇酯树脂组合物形成的,所述成型品在熔接部的厚度为1.3mm以上。

Description

激光熔接用成型品、激光熔接用成型品的激光透射率的偏差 抑制剂
技术领域
本发明涉及可见光透射率和激光透射率优异、也可抑制激光透射率的偏差的激光熔接用成型品、激光熔接用成型品的激光透射率的偏差抑制剂。
背景技术
聚对苯二甲酸丁二醇酯(以下,也称为“PBT”)系树脂等聚对苯二甲酸亚烷基酯树脂的耐热性、耐化学药品性、电气特性、机械特性和成型加工性等各种特性优异,因此,被用于多种用途。
作为具体用途,可以举出各种汽车用电装部件(各种控制单元、各种传感器、点火线圈等)、连接器类、开关部件、继电器部件、线圈部件等。为了制作这些部件,通过利用粘接剂、螺纹紧固、卡扣配合、热板熔接、超声波熔接等接合方法来接合多个成型部件。然而,已经指出了关于这些接合方法的一些问题。例如,使用粘接剂时,在粘接剂固化之前的工序时间的损失、对环境的负荷成为问题。另外,螺纹紧固的情况下,紧固的功夫、成本增大,热板熔接、超声波熔接的情况下,担心制品因热、振动等而损伤。
另一方面,基于激光熔接的接合方法不会因熔接的热、振动而对制品造成损坏,熔接工序也非常简易。因此,最近,激光熔接法逐渐被广泛利用,作为各种树脂部件的熔接手法备受关注。
另外,与超声波熔接、振动熔接之类的熔接方法相比,激光熔接由于不会对内部部件造成损坏,也不会产生磨损屑等,因此,大多被用于收纳精密的基板、传感器的壳体等。由于生产率高,因此,还开发了确认熔接不良的手法等,正在研究利用超声波确认熔接部的方法;激光熔接后用CCD相机拍摄熔接部、在个人电脑中进行图像处理并与基准图像图案进行比较、管理的手法(参照专利文献1、2)等,但这些均需要特殊的设备。另一方面,有时由于要求想要以目视更简易地确认,因此需要熔接部的树脂的透明性。
此外,内置于壳体的基板中,存在搭载了用于确认动作的LED指示器并且能进行视觉上确认动作的类型。也有时从视觉识别这种指示器的方面出发,要求壳体的透明性,并且使用PMMA、聚苯乙烯等透明的树脂。然而,PMMA、聚苯乙烯等树脂的耐热性低,而且对有机溶剂等的耐化学药品性也低,在用途上受到限制。另一方面,虽然PBT的耐热性、耐化学药品性优异,但是由于其为结晶性树脂,因此,透明性不足。
现有技术文献
专利文献
专利文献1:日本特开平8-211030号公报
专利文献2:日本特开2004-167840号公报
发明内容
发明要解决的问题
本发明的课题在于,提供:可见光透射率和激光透射率优异、也可抑制激光透射率的偏差的激光熔接用成型品、激光熔接用成型品的激光透射率的偏差抑制剂。
用于解决问题的方案
本发明人发现:可以通过激光熔接用成型品、含有环氧系化合物的激光熔接用成型品的激光透射率的偏差抑制剂来解决上述课题,所述激光熔接用成型品是由含有(A)聚对苯二甲酸丁二醇酯树脂100质量份、(B)300℃、1000秒-1下的熔融粘度为0.20kPa·s以上的聚碳酸酯树脂、和1质量份以上且10质量份以下的(C)环氧系化合物的聚对苯二甲酸丁二醇酯树脂组合物形成的,所述成型品在熔接部的厚度为1.3mm以上,至此完成了本发明。
即,本发明涉及以下的(1)~(5)。
(1)一种激光熔接用成型品,其是由含有(A)聚对苯二甲酸丁二醇酯树脂100质量份、(B)300℃、剪切速度1000秒-1下的熔融粘度为0.20kPa·s以上的聚碳酸酯树脂、和1质量份以上且10质量份以下的(C)环氧系化合物的聚对苯二甲酸丁二醇酯树脂组合物形成的,所述成型品在熔接部的厚度为1.3mm以上。
(2)根据(1)所述的激光熔接用成型品,其中,相对于(A)聚对苯二甲酸丁二醇酯树脂100质量份,含有70质量份以上且80质量份以下的(B)聚碳酸酯树脂。
(3)根据(1)或(2)所述的激光熔接用成型品,其中,在壁厚为1.5mm且包含前述聚对苯二甲酸丁二醇酯树脂组合物的成型品中,该组合物的波长400nm以上且700nm以下任意范围内的透射率为60%以上。
(4)根据(1)~(3)中任一项所述的激光熔接用成型品,其中,在壁厚为1.5mm且包含前述聚对苯二甲酸丁二醇酯树脂组合物的成型品中,该组合物的波长980nm的透光率的偏差为5.0%以下。
(5)一种激光熔接用成型品的波长980nm的透光率的偏差抑制剂,其中,所述激光熔接用成型品是由含有聚对苯二甲酸丁二醇酯树脂和聚碳酸酯树脂的聚对苯二甲酸丁二醇酯树脂组合物形成的,所述偏差抑制剂含有环氧系化合物。
发明的效果
根据本发明,可以提供:可见光透射率和激光透射率优异、也可抑制激光透射率的偏差的激光熔接用成型品、激光熔接用成型品的激光透射率的偏差抑制剂。
具体实施方式
以下,对本发明的一实施方式详细地进行说明。本发明不限定于以下的实施方式,在不妨碍本发明的效果的范围内可以适宜加以变更而实施。另外,本说明书中“X~Y”的表现是指“X以上且Y以下”。
[聚对苯二甲酸丁二醇酯树脂组合物]
(聚对苯二甲酸丁二醇酯树脂)
聚对苯二甲酸丁二醇酯树脂(PBT树脂)是使至少包含对苯二甲酸或其成酯性衍生物(C1-6的烷基酯、酰卤化物等)的二羧酸成分、与至少包含碳原子数4的亚烷基二醇(1,4-丁二醇)或其成酯性衍生物(乙酰化物等)的二醇成分进行缩聚而得到的聚对苯二甲酸丁二醇酯树脂。本实施方式中,聚对苯二甲酸丁二醇酯树脂不限定于均聚对苯二甲酸丁二醇酯树脂,可以为含有60摩尔%以上的对苯二甲酸丁二醇酯单元的共聚物。
聚对苯二甲酸丁二醇酯树脂的末端羧基量为50meq/kg以下,只要不妨碍本发明的目的就没有特别限定,优选30meq/kg以下、更优选25meq/kg以下。
聚对苯二甲酸丁二醇酯树脂的特性粘度在不妨碍本发明的目的的范围内没有特别限制,优选0.60dL/g以上且1.2dL/g以下、更优选0.65dL/g以上且0.9dL/g以下。在使用这种范围的特性粘度的聚对苯二甲酸丁二醇酯树脂的情况下,得到的聚对苯二甲酸丁二醇酯树脂组合物的成型性特别优异。另外,也可以将具有不同特性粘度的聚对苯二甲酸丁二醇酯树脂共混来调整特性粘度。例如,通过将特性粘度1.0dL/g的聚对苯二甲酸丁二醇酯树脂与特性粘度0.7dL/g的聚对苯二甲酸丁二醇酯树脂共混,从而可以制备特性粘度0.9dL/g的聚对苯二甲酸丁二醇酯树脂。聚对苯二甲酸丁二醇酯树脂的特性粘度例如可以在邻氯苯酚中、在温度35℃的条件下进行测定。
聚对苯二甲酸丁二醇酯树脂的制备中,使用对苯二甲酸以外的芳香族二羧酸或其成酯性衍生物作为共聚单体成分的情况下,例如可以使用:间苯二甲酸、邻苯二甲酸、2,6-萘二羧酸、4,4’-二羧基二苯醚等C8-14的芳香族二羧酸;琥珀酸、己二酸、壬二酸、癸二酸等C4-16的烷烃二羧酸;环己烷二羧酸等C5-10的环烷烃二羧酸;这些二羧酸成分的成酯性衍生物(C1-6的烷基酯衍生物、酰卤化物等)。这些二羧酸成分可以单独使用或组合2种以上而使用。
这些二羧酸成分中,更优选间苯二甲酸等C8-12的芳香族二羧酸、和己二酸、壬二酸、癸二酸等C6-12的烷烃二羧酸。
聚对苯二甲酸丁二醇酯树脂的制备中,使用1,4-丁二醇以外的二醇成分作为共聚单体成分的情况下,例如可以使用:乙二醇、丙二醇、三亚甲基二醇、1,3-丁二醇、六亚甲基二醇、新戊二醇、1,3-辛二醇等C2-10的亚烷基二醇;二乙二醇、三乙二醇、二丙二醇等聚氧亚烷基二醇;环己烷二甲醇、氢化双酚A等脂环式二醇;双酚A、4,4’-二羟基联苯等芳香族二醇;双酚A的环氧乙烷2摩尔加成体、双酚A的环氧丙烷3摩尔加成体等双酚A的C2-4的环氧烷加成体;或这些二醇的成酯性衍生物(乙酰化物等)。这些二醇成分可以单独使用或组合2种以上而使用。
这些二醇成分中,更优选乙二醇、三亚甲基二醇等C2-6的亚烷基二醇、二乙二醇等聚氧亚烷基二醇、或环己烷二甲醇等脂环式二醇等。
作为除二羧酸成分和二醇成分之外能使用的共聚单体成分,例如可以举出4-羟基苯甲酸、3-羟基苯甲酸、6-羟基-2-萘甲酸、4-羧基-4’-羟基联苯等芳香族羟基羧酸;二醇酸、羟基己酸等脂肪族羟基羧酸;丙内酯、丁内酯、戊内酯、己内酯(ε-己内酯等)等C3-12内酯;这些共聚单体成分的成酯性衍生物(C1-6的烷基酯衍生物、酰卤化物、乙酰化物等)。
聚对苯二甲酸丁二醇酯树脂的含量优选为树脂组合物的总质量的30~90质量%、更优选为40~80质量%、进一步优选为50~70质量%。
(聚碳酸酯树脂)
聚碳酸酯树脂(PC树脂)中,可以举出通过二羟基化合物与碳酰氯或碳酸二苯酯等碳酸酯的反应而得到的聚合物。二羟基化合物可以为脂环式二醇等脂环族化合物等,优选为芳香族化合物、更优选为双酚化合物。二羟基化合物可以单独使用或组合两种以上而使用。
作为双酚化合物,可以举出:双(4-羟基苯基)甲烷、双(4-羟基-3-甲基苯基)甲烷、1,1-双(4-羟基苯基)乙烷、1,1-双(4-羟基-3-甲基苯基)乙烷、1,1-双(4-羟基苯基)丙烷、2,2-双(4-羟基苯基)丙烷(双酚A)、2,2-双(4-羟基-3-甲基苯基)丙烷、2,2-双(4-羟基-3,5-二甲基苯基)丙烷、2,2-双(4-羟基-3-乙基苯基)丙烷、2,2-双(4-羟基-3-叔丁基苯基)丙烷、2,2-双(4-羟基-3-溴苯基)丙烷、2,2-双(4-羟基苯基)丁烷、2,2-双(4-羟基苯基)-3-甲基丁烷、2,2-双(4-羟基苯基)戊烷、2,2-双(4-羟基苯基)己烷、2,2-双(4-羟基苯基-4-甲基戊烷、2,2-双(4-羟基苯基)辛烷、双(4-羟基苯基)苯基甲烷、双(4-羟基苯基)二苯基甲烷、双(4-羟基苯基)二苄基甲烷、1,1-双(4-羟基苯基)-1-苯基丙烷、2,2,2’,2’-四氢3,3,3’,3’-四甲基-1,1’-螺双-[1H-茚]-6,6’-二醇等双(羟基芳基)C1-10烷烃、优选双(羟基芳基)C1-6烷烃;1,1-双(4-羟基苯基)环戊烷、1,1-双(4-羟基苯基)环己烷等双(羟基芳基)C4-10环烷烃;4,4’-二羟基二苯醚、4,4’-二羟基-3,3’-二甲基二苯醚等二羟基芳基醚、;4,4’-二羟基二苯基砜、4,4’-二羟基-3,3’-二甲基二苯基砜等二羟基芳基砜;4,4’-二羟基二苯基硫醚、4,4’-二羟基-3,3’-二甲基二苯基硫醚等二羟基芳基硫醚;4,4’-二羟基二苯基亚砜、4,4’-二羟基-3,3’-二甲基二苯基亚砜等二羟基芳基亚砜;4,4’-二羟基二苯基酮、4,4’-二羟基-3,3’-二甲基二苯基酮等二羟基芳基酮。
作为优选的聚碳酸酯树脂,可以举出双酚A型聚碳酸酯。
聚碳酸酯树脂可以为均聚碳酸酯,也可以为共聚碳酸酯。另外,聚碳酸酯树脂可以单独使用1种,也可以组合2种以上而使用。
本发明中使用的聚碳酸酯树脂的300℃、剪切速度1000秒-1下的熔融粘度为0.20kPa·s以上,优选0.21kPa·s以上、更优选0.22kPa·s以上、进一步优选0.24kPa·s以上、特别优选0.25kPa·s以上。
本发明中的聚碳酸酯树脂的含量相对于聚对苯二甲酸丁二醇酯树脂100质量份,优选70质量份以上且80质量份以下、更优选72质量份以上且80质量份以下、进一步优选74质量份以上且80质量份以下。
(环氧系化合物)
作为本发明中的环氧系化合物,例如可以举出联苯型环氧化合物、双酚A型环氧化合物、苯酚酚醛清漆型环氧化合物、甲酚酚醛清漆型环氧化合物等芳香族环氧化合物。环氧化合物可以任意组合2种以上的化合物而使用。环氧当量优选为600~1500g/当量(g/eq)。
本发明中的环氧系化合物的添加量相对于聚对苯二甲酸丁二醇酯树脂100重量份,为1~10质量份、优选为1.5~5质量份、进一步优选为2~4质量份左右。添加量如果过少,则得不到透射率抑制效果,添加量如果过多,则注射成型时粘度上升而存在引起未填充、变色的情况。
由本发明的激光熔接用聚对苯二甲酸丁二醇酯树脂组合物成型而得到的、具有1mm厚度的成型品中,波长980nm的透光率优选40.0%以上、更优选41.0%以上、进一步优选42.0%以上、特别优选43.0%以上。
另外,由本发明的聚对苯二甲酸丁二醇酯树脂组合物成型而得到的、具有1.5mm厚度的成型品中,波长400nm以上且700nm以下任意范围内的透射率优选20%以上、更优选30%以上、进一步优选40%以上、特别优选50%以上、最优选60%以上。
另外,由本发明的聚对苯二甲酸丁二醇酯树脂组合物成型而得到的、具有1.0mm厚度的成型品中,波长980nm的透光率的偏差优选10.0%以下、更优选9.5%以下、进一步优选9.0%以下、特别优选8.0%以下。
进而,由本发明的聚对苯二甲酸丁二醇酯树脂组合物成型而得到的、具有1.5mm厚度的成型品中,波长980nm的透光率的偏差优选6.0%以下、更优选5.5%以下、进一步优选5.0%以下、特别优选4.5%以下、最优选4.0%以下。
(激光熔接用成型品的波长980nm的透光率的偏差抑制剂)
此外,通过使用上述环氧系化合物,从而可以制成由含有聚对苯二甲酸丁二醇酯树脂和聚碳酸酯树脂的聚对苯二甲酸丁二醇酯树脂组合物形成的激光熔接用成型品的波长980nm的透光率的偏差抑制剂。
(填充剂)
本发明的激光熔接用聚对苯二甲酸丁二醇酯树脂组合物中,可以根据需要使用填充剂。优选配混这种填充剂以得到机械强度、耐热性、尺寸稳定性、电性质等性能优异的性质,特别是出于提高刚性的目的是有效的。可以根据其目的使用纤维状、粉粒状或板状的填充剂。
作为纤维状填充剂,可以举出玻璃纤维、二氧化硅纤维、二氧化硅/氧化铝纤维、氧化锆纤维、氮化硼纤维、氮化硅纤维、硼纤维等。需要说明的是,也可以使用聚酰胺、氟树脂、丙烯酸类树脂等高熔点的有机质纤维状物质。
作为粉粒状填充剂,可以举出石英粉末、玻璃珠、玻璃粉、硅酸钙、硅酸铝、高岭土、粘土、硅藻土、硅灰石等硅酸盐(排除滑石)、碳化硅、氮化硅、氮化硼等。
另外,作为板状无机填充剂,可以举出云母、玻璃鳞片等。
填充剂的种类没有特别限定,可以添加1种或多种以上的填充剂。特别优选使用玻璃纤维、玻璃鳞片。
填充剂的添加量无特别限定,相对于聚对苯二甲酸丁二醇酯树脂组合物100质量份,优选200质量份以下。过剩地添加填充剂的情况下,成型性差,可见韧性降低。
(其他成分)
本发明的实施方式的聚对苯二甲酸丁二醇酯树脂组合物中,在不妨碍本发明的效果的范围内,为了赋予符合其目的的期望的特性,可以配混通常添加至热塑性树脂和热固性树脂的公知的物质、例如抗氧化剂、紫外线吸收剂等稳定剂、耐水解改善剂(例如碳二亚胺等)、抗静电剂、阻燃剂、阻燃助剂、防滴落剂、染料、颜料等着色剂、脱模剂、润滑剂、结晶促进剂、结晶成核剂等。
(激光熔接用成型品)
本发明的实施方式的激光熔接用成型品是将本发明的聚对苯二甲酸丁二醇酯树脂组合物成型而成的。成型方法没有特别限定,可以采用公知的成型方法。例如可以利用如下方法等制造:方法(1),将各成分混合,利用单螺杆挤出机或双螺杆挤出机进行混炼并挤出以制备粒料,然后进行成型;方法(2),暂时制备组成不同的粒料(母料),将该粒料以规定量混合(稀释)并供于成型,得到规定组成的成型品;方法(3),在成型机中直接投入各成分的1者或2者以上。需要说明的是,粒料例如可以通过将除脆性成分(玻璃系增强材料等)之外的成分进行熔融混合后,将脆性成分混合,从而制备。另外,由热塑性树脂形成的其他成型品的成型方法也没有特别限定,可以采用公知的成型方法。
成型体可以将前述树脂组合物熔融混炼、利用挤出成型、注射成型、压缩成型、吹塑成型、真空成型、旋转成型、气体注射成型等常用的方法进行成型,通常利用注射成型进行成型。需要说明的是,注射成型时的模具温度通常为40~90℃、优选50~80℃、进一步优选60~80℃左右。
成型品的形状没有特别限制,通过激光熔接将成型品与对象材料(热塑性树脂所形成的其他成型品)接合而使用,因此,优选具有平面等接触面的形状(例如板状)。另外,本发明的成型体对激光束的透过性高,因此,熔接部的厚度、即、激光束透过的部位的成型品的厚度(激光束透过的方向的厚度)可以从宽的范围中选择,例如可以为0.1~3.0mm、优选0.5~2.5mm、更优选1.0~2.0mm左右。如果考虑成型品的强度和透过性,则特别优选1.3~1.5mm左右。
作为激光束源,没有特别限制,例如可以利用色素激光、气体激光(准分子激光、氩激光、氪激光、氦-氖激光等)、固体激光(YAG激光等)、半导体激光等。作为激光束,通常利用脉冲激光。
前述成型品的激光熔接性优异,因此,优选通常通过激光熔接而与对象材料的树脂成型品熔接,根据需要,也可以通过其他热熔接法、例如振动熔接法、超声波熔接法、热板熔接法等而与其他树脂成型品熔接。
(复合成型品)
本发明的复合成型品优选将由聚对苯二甲酸丁二醇酯树脂组合物形成的成型品(第1成型品)与对象材料的树脂成型品(第2成型品、热塑性树脂所形成的其他成型品)通过激光熔接而接合并一体化。例如,使第1成型品与第2成型品接触(特别是至少使接合部进行面接触),并照射激光束,从而使第1成型品与第2成型品的界面进行局部地熔融,使接合面密合并冷却,从而可以将二种成型品接合、一体化,形成1个成型体。这种复合成型品中,如果使用本发明的成型品,则通过熔接得到高的接合强度,通过激光束的照射可以保持与未熔接的非熔接部材同等的高的熔接强度。因此,即使进行激光熔接,也可以实质上不降低接合强度,可以得到牢固地接合的复合成型体。
作为构成前述对象材料的树脂成型品的树脂,没有特别限制,可以举出各种热塑性树脂、例如烯烃系树脂、乙烯基系树脂、苯乙烯系树脂、丙烯酸类树脂、聚酯系树脂、聚酰胺系树脂、聚碳酸酯系树脂等。这些树脂中,可以由与构成前述激光熔接用聚对苯二甲酸丁二醇酯树脂组合物的树脂同种类或同系统的树脂(PBT系树脂、PET系树脂等聚酯系树脂、聚碳酸酯系树脂、苯乙烯系树脂、丙烯酸类树脂等)或其他组合物构成对象材料。例如,可以由本发明的激光熔接用聚对苯二甲酸丁二醇酯树脂组合物分别形成第1成型体与第2成型体。
被粘物可以包含对激光束的吸收剂或着色剂。前述着色剂可以根据激光束的波长而选择,可以举出无机颜料[炭黑(例如乙炔黑、灯黑、热裂炭黑、炉黑、槽法炭黑、科琴黑等)等黑色颜料、氧化铁红等红色颜料、钼酸橙等橙色颜料、氧化钛等白色颜料等]、有机颜料(黄色颜料、橙色颜料、红色颜料、蓝色颜料、绿色颜料等)等。这些吸收剂可以单独使用或组合两种以上而使用。作为吸收剂,通常可以使用黑色颜料或染料、特别是炭黑。炭黑的平均粒径通常可以为10~1000nm、优选10~100nm左右。着色剂的比例相对于被粘物整体,为0.1~10重量%、优选为0.3~5重量%(例如为0.3~3重量%)左右。
激光束的照射通常从第1成型体朝向第2成型体的方向进行,在包含吸收剂或着色剂的第2成型体的界面放热,从而使第1成型体与第2成型体熔接。需要说明的是,根据需要,可以利用棱镜系,将激光束聚光至第1成型品与第2成型品的界面以使接触界面熔接。
本发明的优选的方式中,还包括:将由本发明的聚对苯二甲酸丁二醇酯树脂组合物形成的成型品与由热塑性树脂形成的其他成型品通过激光熔接接合而成的复合成型品。
[实施例]
以下,根据实施例,对本发明具体地进行说明,但本发明只要不超过其主旨就不限定于以下的实施例。
<材料>
·(A)聚对苯二甲酸丁二醇酯树脂
Polyplastics Co.LTD制PBT树脂、特性粘度0.69dl/g
·(B)聚碳酸酯树脂
(B-1)300℃、剪切速度1000秒-1下的熔融粘度:0.27kPa·s的PC树脂
(B-2)300℃、剪切速度1000秒-1下的熔融粘度:0.09kPa·s的PC树脂
·(C)环氧系化合物
三菱化学制环氧树脂1004K环氧当量900g/eq
·(D)滑石
林化成株式会社制、平均粒径2.6μm
·(E)稳定剂
大平化学产业制磷酸二氢钙
·(F)润滑剂
Riken Vitamin Co.,Ltd.制二甘油脂肪酸酯RIKEMAL B74
·(G)玻璃纤维
日本电气硝子制ECS03T-127(平均纤维直径13μm、平均纤维长度3mm)
<成型条件>
使用FANUC Corporation制注射成型机S-2000i100B,在机筒温度260℃、模具温度40℃、60℃、80℃下,制成80mm×80mm×1.0mmt或1.5mmt的试验片。
<透射率测定(激光束)>
将80mm×80mm×1.0mmt或1.5mmt的试验片分割为16个20mm×20mm×1.0mmt或1.5mmt的试验片,对于各自的中央部,使用分光光度计(日本分光株式会社制,V770),测定波长980nm下的各种试验片的透光率(%)。
<透射率测定(可见光)>
将80mm×80mm×1.5mmt的试验片分割为16个20mm×20mm×1.5mmt的试验片,对于各自的中央部,使用分光光度计(日本分光株式会社制,V770),测定波长400nm、500nm、600nm、700nm下的各种试验片的透光率(%)。
<实施例1、比较例1~9>
相对于(A)聚对苯二甲酸丁二醇酯树脂100质量份,以表1所示的比例混合各成分后,使用日本制钢所制TEX30,在机筒温度260℃、排出量15kg/小时、螺杆转速130rpm下进行熔融混炼并挤出,得到由聚对苯二甲酸丁二醇酯树脂组合物形成的粒料。然后,使用FANUCCorporation制注射成型机S-2000i100B,通过注射成型由该粒料制作80mm×80mm×1mmt或1.5mmt的试验片,进行波长980nm下的透光率(%)和波长400nm、500nm、600nm、700nm下的各种试验片的透光率(%)的测定。将结果示于表1。
[表1]
如表1所示,制品的厚度变厚的情况下,环氧树脂中确认了抑制透射率的偏差的效果。

Claims (5)

1.一种激光熔接用成型品,其是由含有(A)聚对苯二甲酸丁二醇酯树脂100质量份、(B)300℃、剪切速度1000秒-1下的熔融粘度为0.20kPa·s以上的聚碳酸酯树脂、和1质量份以上且10质量份以下的(C)环氧系化合物的聚对苯二甲酸丁二醇酯树脂组合物形成的,所述(C)环氧系化合物为选自联苯型环氧化合物、双酚A型环氧化合物、苯酚酚醛清漆型环氧化合物、甲酚酚醛清漆型环氧化合物中的一种以上,所述成型品在熔接部的厚度为1.3mm以上,相对于聚对苯二甲酸丁二醇酯树脂100质量份,聚碳酸酯树脂的含量为70质量份以上且80质量份以下。
2.根据权利要求1所述的激光熔接用成型品,其中,相对于(A)聚对苯二甲酸丁二醇酯树脂100质量份,含有70质量份以上且80质量份以下的(B)聚碳酸酯树脂。
3.根据权利要求1或2所述的激光熔接用成型品,其中,在壁厚为1.5mm且包含所述聚对苯二甲酸丁二醇酯树脂组合物的成型品中,该组合物的波长400nm以上且700nm以下任意范围内的透射率为60%以上。
4.根据权利要求1或2所述的激光熔接用成型品,其中,在壁厚为1.5mm且包含所述聚对苯二甲酸丁二醇酯树脂组合物的成型品中,该组合物的波长980nm的透光率的偏差为5.0%以下。
5.环氧系化合物在作为激光熔接用成型品的波长980nm的透光率的偏差抑制剂中的用途,所述激光熔接用成型品是由含有聚对苯二甲酸丁二醇酯树脂和聚碳酸酯树脂的聚对苯二甲酸丁二醇酯树脂组合物形成的,所述环氧系化合物为选自联苯型环氧化合物、双酚A型环氧化合物、苯酚酚醛清漆型环氧化合物、甲酚酚醛清漆型环氧化合物中的一种以上。
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