CN118181424A - 用于涂覆平面工件的方法 - Google Patents
用于涂覆平面工件的方法 Download PDFInfo
- Publication number
- CN118181424A CN118181424A CN202410418823.XA CN202410418823A CN118181424A CN 118181424 A CN118181424 A CN 118181424A CN 202410418823 A CN202410418823 A CN 202410418823A CN 118181424 A CN118181424 A CN 118181424A
- Authority
- CN
- China
- Prior art keywords
- coating
- workpiece
- varnish
- planar workpiece
- carrier plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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Abstract
本发明涉及用于涂覆平面工件的方法。为了提供具有改善的性能特性的由具有木质纤维素纤维和比例大于50重量%粘结剂以及任选的填料的工件生产的平面工件,提供了具有以下步骤的方法:‑提供具有顶面和底面以及侧表面的平面工件,‑施加涂层,‑施加装饰品,‑任选地,在顶面、底面或侧表面的每种情况下的至少一部分上使所述涂层结构化,以及‑任选地使所述涂层固化。
Description
本申请是申请号为202080029521.3,申请日为2020年1月9日,发明名称为“用于涂覆平面工件的方法”的分案申请。
本发明涉及用于涂覆平面工件的方法、经涂覆的平面材料、和经涂覆的平面工件的用途。
虽然原则上也可以在没有涂层的情况下使用平面工件,但是对于大多数使用情况,施加涂层以提高工件的可用性并且改善工件的美学印象二者。平面工件材料的组成决定了如何可以最好地涂覆该工件。典型的平面材料在美国2015/0017461A1中公开。
在当前情况下,具有多于50重量%粘结剂以及此外木质纤维素纤维和任选的骨料(aggregates)的平面工件的性能特性将得到改善。该目的通过根据权利要求1的方法以及通过根据权利要求9的平面工件来解决。出乎意料地,发现可以使用所有已知的涂覆技术来涂覆该平面工件。
待涂覆的平面工件由具有木质纤维素纤维和粘结剂以及任选的骨料的材料生产,其中粘结剂的比例为至少50重量%(作为固体计算)。粘结剂比例还相对于atro(干透的)纤维比例来计算并且可以为101重量%高至500重量%粘结剂(与本发明有关,atro意指纤维部分在105℃下干燥至恒定重量)。这样的材料在欧洲专利申请19170159.8中描述。
特别地,三聚氰胺-甲醛树脂、亚甲基二苯基异氰酸酯(MDI)(还以乳化形式作为eMDI)、聚合二苯基甲烷二异氰酸酯(PMDI)以及由于强的着色而为有限程度的酚醛树脂、或前述粘结剂的混合物适合作为粘结剂。材料中的粘结剂特别是三聚氰胺的特性可以通过添加弹性体或热塑性塑料例如通过添加聚乙酸乙烯酯(PVAc)或乙烯乙酸乙烯酯来改变,特别是通过塑化来改善。添加单甘醇或二甘醇也适合于使平面材料塑化。丙烯酸酯、苯乙烯丙烯酸酯、或聚氨酯分散体(PU分散体)优选用于使平面材料塑化,其中其玻璃化转变温度优选低于0℃(Tg<0℃)。相对于所使用的合成树脂的固体重量,这些添加剂与合成树脂按比例根据添加剂的固体比例的重量测量的以最大1:1,优选高至0.7:1,特别地高至0.2:1,有利地至少0.1:1的比率使用。然而,优选不使用热塑性塑料作为粘结剂的主要组分,尤其不作为定量的主要组分。
还可以向材料中添加天然纤维或合成纤维、无机纤维或有机纤维、或者纤维特别是前述纤维的混合物。平面材料可以包含相对于材料的总量的高至30重量%骨料,尤其是非吸湿性骨料或非溶胀性骨料。骨料可以由矿物、陶瓷、或者合成材料或玻璃组成。还可以使用骨料的混合物。平面材料可以具有根据DIN 137(载板的溶胀)或相应地DIN 13329(经涂覆的载板中的边缘溶胀)在每种情况下测量的至多3%,优选至多2%,优选小于1%的厚度的溶胀。有利地,在每种情况下相对于平面材料的总重量,疏水剂例如石蜡或蜡通常可以以高至5重量%的量,优选以高至2重量%的量,通常以0.1重量%至1.5重量%的量使用。也可以使用疏水剂的混合物。此外,相对于平面材料的总重量,通常可以将一种或更多种灭藻剂和/或杀菌剂以高至5重量%的量添加至平面材料中。
平面工件的厚度为1mm至500mm,通常为3mm至80mm。生产平面工件的材料的密度为1000kg/m3至1800kg/m3,通常为1000kg/m3至1600kg/m3。
用于根据本发明的平面工件的材料可以在用于生产木质材料板的已知体系上生产。纤维被胶合,即供应有粘合剂,散布以形成纤维饼,并且在向平面材料的顶面和底面上施加压力的压机中(例如在双带压机中或在短周期压机中)在热和压力的作用下被压制以形成平面材料。典型的压制条件为140℃至220℃,通常160℃至200的温度以及0.3N/mm2至5.5N/mm2,优选1N/mm2至3N/mm2的压力,通常6秒/mm板厚度至20秒/mm板厚度的压制持续时间。可以以任何尺寸生产能够压制获得的平面材料。
与先前已知的平面工件(特别是由木质材料制成的那些)相比,由于所使用的材料,意指工件的顶面、底面和侧表面的表面具有显著较少的纤维而是相反主要地固化的粘结剂。未预料到的是,先前的涂覆方法可以用于新的平面材料而没有困难。然而,发现可以进行根据本发明的用于涂覆平面工件的方法,平面工件的材料具有木质纤维素纤维和比例大于50重量%粘结剂,其中所述方法由以下步骤来进行:
-提供具有顶面和底面以及侧表面的平面工件,
-施加涂层,
-施加装饰品,
-任选地,在顶面、底面或侧表面的至少一部分上使所述涂层结构化,以及
-任选地使涂层固化。
发现主要由固化的粘结剂组成的工件的表面可以被良好地涂覆。涂层良好地粘附至主要由合成树脂形成的工件的表面。生产平面工件的材料的组分,即粘结剂和纤维以及任选的骨料也特别适合于在施加压力和高温下通过压机而施加的那些涂层。然而,涂漆和层合(粘附膜或粘附纸)也可能形成涂层。还可以将单独的涂覆手段和下述方法结合。根据本发明施加的涂层可以为单层或多层,如以下详细说明。涂层显著改善了平面工件的性能特性。涂层密封工件的表面,尤其是防潮,因此优选将工件设计成防水的,其改善了维护特性,并且其能够实现工件表面的美学设计。
本发明还涉及具有木质纤维素纤维和多于50重量%粘结剂的平面材料,其中平面材料具有顶面、底面和侧表面,特征在于顶面、底面或侧表面至少部分地设置有涂层,所述涂层具有装饰品和任选的结构。根据设计,涂层提高了根据本发明的工件的可用性,例如在物理方面(例如,耐温性和防水性、耐刮擦性、耐磨性、导电性),在化学方面,例如通过改善的耐酸性和耐碱性,或者还在美学方面,例如通过施加有吸引力的装饰品和任选的结构。
为了工件表面的美学设计,施加装饰品,意指二维施加基本上由至少一种颜色,通常由两种或更多种颜色组成。不仅天然装饰品例如仿木或仿石,而且富有想象力的装饰品也是典型的。特别简单的装饰品显示出简单的彩色面。装饰品可以直接施加例如印刷或喷涂或辊涂在根据本发明的工件的表面上,或者相应地施加在其上施加的涂层例如底漆上。或者,可以将装饰品印刷在纸或膜上,之后将印刷的纸或印刷的膜施加至平面工件的表面,通常层合在其上,或者将其在合成树脂中浸渍并干燥之后,在使合成树脂固化的同时进行压制。装饰品通常不耐磨,因此通常由例如由合成树脂、清漆或热熔体制成的密封剂保护。
特别地,当装饰品仿造木材时,而且在其他装饰品中,引入结构增强逼真图像的印象。与装饰品相比,该结构是三维的。其通常在空间上是受限的,通常包括例如木材装饰品中的孔。通常将该结构引入到布置在装饰品上方的涂层中。该结构可以作为压痕引入装饰品上方的该涂层中;或者,该结构可以作为装饰品上的凸起图案或者装饰品上方的相应的涂层而施加。该结构的深度或相应地高度通常为1μm至400μm,优选为10μm至100μm。压痕通常通过设置有对应的凸起图案的压纹辊或压纹片而引入。或者,通过将可湿性材料和非可湿性材料组合,例如通过在可湿性材料的基体中,在压痕应形成的每个位置中施加部分非可湿性材料的第一层,压痕也可以作为所谓的化学孔而被施加。然后,施加仅润湿可湿性材料的第二层的材料。然后非可湿性材料的剩余部分形成压痕。通过施加少量的涂层材料(清漆、墨、油漆)的印刷机或辊来施加凸起图案。当装饰品和结构同时施加时是特别优选的。这意指,当例如以装饰品中的色彩施加的孔对应于结构时。以这种方式,例如以特别自然的方式仿造木材装饰品。
或者,结构还可以独立于装饰品而施加。然后通常不显示指纹的哑光效果或表面是期望的。最后,还可以将独立于装饰品的结构和与装饰品同步的结构组合。
施加至根据依据本发明的方法的平面工件的涂层可以包含例如合成树脂或清漆。优选使用三聚氰胺-甲醛树脂。优选地,使用辐射固化的清漆(电子束固化的清漆或UV固化的清漆)作为清漆。合成树脂可以例如以液体形式直接施加,其中优选以多层例如以2至10层有利地总量为约20g/m2至100g/m2施加合成树脂。作为合成树脂,例如应用三聚氰胺-甲醛树脂。合成树脂通常具有固体含量,即,合成树脂的总量中的合成树脂的比例为40%至70%,优选为55%至70%。
合成树脂可以包含骨料,例如刚玉或玻璃或陶瓷颗粒。这些骨料改善例如根据本发明的工件的表面的耐磨性或相应地耐刮擦性。其他骨料例如石墨或金属颗粒或纤维改善平面工件表面的导电性。将直径为1μm至100μm,优选5μm至90μm,特别是20μm至70μm的骨料(或者在刚玉的情况下,晶粒根据FEPA标准为F180至F240)以通常5g/m2至100g/m2,有利地10g/m2至60g/m2的量添加至合成树脂中。特别地,在形成涂层外部的最外部合成树脂层中优选不包含改善耐刮擦性和耐磨性的骨料。
各个合成树脂层在中间步骤中例如通过热空气或IR辐射有利地干燥至5%至25%,优选4%至10%的含水量。然后它们达到所谓的B状态,在该B状态下,合成树脂通常不再是粘性的而仍是反应性的。然后使完全施加的合成树脂涂层在压机例如短周期压机中在压力和升高的温度的作用下固化。典型的压制条件包括160℃至220℃,优选180℃至200℃的温度,20kg/cm2至50kg/cm2,优选22kg/cm2至40kg/cm2的压制压力以及5秒至60秒,优选5秒至30秒的压制时间。
涂层可以以纸的形式和/或以膜的形式施加。特别地,其中合成树脂是干燥的但仍是反应性的(意指处于B状态)的经合成树脂浸渍的纸容易地用于涂覆平面工件的表面。在该实施方案中,将合成树脂施加至纸的层上,之后将其干燥但不固化。该过程也称为浸渍。浸渍可以在多个步骤中进行,任选地在已经施加合成树脂的中间干燥期间进行。在这种情况下还可以施加不同的合成树脂或合成树脂的混合物。上述骨料也可以以上述的量和尺寸添加于此,在这种情况下,也优选在稍后形成涂层外部的合成树脂层中不添加。通常,还可以将液体合成树脂和呈粉末形式的合成树脂的混合物用于对平面工件的直接施加和用于对纸的浸渍二者。可以将一种或更多种经合成树脂浸渍的纸放在平面工件的表面上。将其与平面工件在压机特别是短周期压机中进行压制,其中首先使合成树脂液化然后固化。压制条件对应于上述用于使作为液体施加的合成树脂涂层固化的压制条件。
平面工件的表面涂覆可以只用清漆进行;在这种情况下还优选以多层施加。或者,清漆还可以应用于合成树脂涂层,特别地用于形成涂层的外部。还可以使用其中清漆在施加之后干燥或固化的涂覆有清漆的纸。清漆以及合成树脂不仅可以以液体形式使用,而且作为固体,例如,以粉末清漆的颗粒形式使用。合成树脂例如三聚氰胺-甲醛树脂也可以以粉末的形式使用。使粉末在压力和升高的温度的作用下融化,通常流动以形成封闭的涂层并固化。液体清漆可以通过喷涂、辊涂和/或浇注施加。工件可以在所有侧面(顶面、底面、侧表面)上涂漆;特别地异形表面,例如设置有引入到工件的侧面的V形接头的异形表面也可以涂漆。可以使用清漆作为非着色清漆或着色清漆。清漆可以包含提及的与合成树脂的应用有关的骨料。可以使用清漆作为透明清漆或不透明清漆。清漆可以辊涂、浇注、喷涂、印刷或用刮刀施加。将清漆施加至根据本发明的工件的表面以覆盖整个表面或部分表面。将清漆以5g/m2至300g/m2的量施加至平面工件的表面,也包括施加至已经存在的涂层或底漆上。优选地,施加电子束固化清漆或UV固化清漆。在清漆的多层施加期间,在施加下一层清漆之前,意指使已经施加的清漆层部分固化的部分塑化也是有利的。然后使用清漆涂覆的多层完全固化。
用于涂覆根据本发明的平面工件的表面的另一替代方案是施加热熔体,例如聚氨酯热熔体(PU热熔体)、聚酯、聚酰胺、聚烯烃、或聚乙酸酯热熔体例如乙烯乙酸乙烯酯热熔体。热熔体可以以单层或多层施加,其中优选多层施加。热熔体可以具有上述用于施加塑料的相同的骨料。热熔体可以以非着色形式或着色形式使用,其中颜料的比例可以高至30重量%。热熔体可以为透明的或不透明的。可以将热熔体施加至根据本发明的工件表面以覆盖整个表面或部分表面。热熔体以10g/m2至300g/m2的量,优选以50g/m2至200g/m2的量施加。在将热熔体在80℃至160℃,通常在100℃至130℃的温度下施加之后,通过冷却将热熔体固定。热熔体可以辊涂,用刮刀施加或喷涂。特别是可以用基于水的或UV固化的印刷墨印刷已经施加并且优选已经冷却的热熔体的层以施加装饰品。热熔体涂层也经常与清漆层组合,通常与形成经涂覆的平面工件的外侧的最终外部清漆层组合。如下所述,热熔体也经常用于特别是与层合材料(例如连续压力层合体(CPL)或高压层合体(HPL))、或塑料膜(例如聚氯乙烯膜(PVC膜))或印刷纸组合来固定其他涂层材料。
最后,根据本发明的工件的表面的可用性可以由于施加层合体而得到改善。层合体具有拥有通常即用型外侧的涂层,所述涂层例如如上所述通过热熔体或通过粘合剂粘附至根据本发明的材料。层合体的一个典型实施方案是CPL或HPL,其由例如复数个经合成树脂浸渍的纸组成,其中经合成树脂浸渍的纸或膜在合成树脂的固化期间已经被压制在一起。然而,还可以层合PVC膜。通常用作为粘合剂的热熔体将CPL或HPL或另外其他具有即用型表面的涂层例如PVC膜施加至平面工件的表面。层合体例如在层压机中在高至300N/cm2的压力下在80℃至200℃下进行压制。压制持续时间短并且通常最多为1秒。层合体系通常被配置为压延机体系。
无论是出于美学原因或出于进一步改善可用性,即使层合体的表面本身已经随时可用,这也并不排除施加另外的涂层或密封剂。例如,无论是否实现特定的视觉效果或由于例如至少一个清漆层包含用于改善耐磨性或用于改善耐刮擦性的刚玉、二氧化硅气凝胶,例如,通常施加一层或更多层清漆。
还发现,主要具有粘结剂,特别是三聚氰胺,但此外还具有木质纤维素纤维的工件的表面可以被良好地印刷。印刷可以利用模拟手段,例如利用辊进行,但也可以利用数字手段,例如利用喷墨印刷机或激光印刷机进行。至少部分地涂覆有印刷墨的工件的表面可以任选地通过施加另外的涂层来密封。例如,以单层或多层施加的清漆、以单层或多层施加的热熔体、或者以单层或多层施加的合成树脂涂层,例如以覆盖层或作为液体施加的合成树脂的形式适合于该目的。
发现包含上述印刷墨的涂层良好地粘附至根据本发明的工件的表面。这并不排除底漆被用于另外地优化粘附力。例如,可以应用合成树脂作为底漆以改善相同或不同涂层的另外的层的粘附力。此外,底漆可以用于使平面工件着色均匀。例如,着色合成树脂、着色清漆或着色热熔体可以用作底漆。如有需要,为了施加另外的涂层或涂层的另外的层,也可以将底漆施加至现有的涂层。
发现仅在平面工件的顶面或底面上的涂层导致弯曲至比由其他材料制成,例如由木刨花板或木纤维板制成的平面工件的情况下显著低的程度。尽管如此,单面涂层在个别情况下也可能导致工件的不期望的弯曲。为了抵消这种情况、或者相应地为了防止这样的弯曲,优选在工件的与涂层相对的侧面施加背衬。背衬可以与涂层相同、类似或不同。背衬至少部分地补偿由于单面涂层而作用在平面材料上的变形力仅是必要的。通常,背衬不具有任何装饰品或结构,尽管装饰品和/或结构当然可以正好如在涂层的情况下一样施加,特别是如果,例如,在稍后的使用中根据本发明的工件的顶面和底面二者均是可见的。
根据另一替代方案,可以将脚步声隔音材料施加特别是粘附或层合在特别是工件的底面上。例如,纸板或硬纸板以及发泡聚苯乙烯(EPS)特别好地适合用作背衬。当使用纸板或硬纸板时,优选将这些材料制成疏水的。
在一个优选实施方案中,将由通过涂层强化的材料制成的根据本发明的工件分成面板,其中工件或相应地面板设置有至少两个机加工的、特别是异形的面向彼此的边缘。有利的边缘轮廓基于榫槽轮廓,但优选另外具有防止在板的平面内拉开的部分。然而,面板也可以用粘合剂或用连接元件彼此连接。优选选择面板之间的防水连接以获得用于墙壁、天花板或地板的防水覆盖物或者以设计用于室内或室外建筑例如外观的防水结构。
如上涂覆的并且任选地分成面板的根据本发明的工件可以以多种方式使用,特别是当提供异形边缘时。典型的用途是地板、墙壁和/或天花板覆盖物,但也用于作为结构元件或覆层元件的户外建筑。
就与载板的涂层相关的特征在本说明书的上下文中解释而言,包括以下示例性实施方案,独立于特定上下文中的公开内容的这些单独特征就技术上的可能性而言可以自由组合,即,也可用于载板的其他涂层。
下面使用示例性实施方案更详细地说明本发明的细节。
在下文中,如果载板作为工件涂覆,则载板总是意指由54重量%三聚氰胺树脂和45重量%木纤维以及1重量%石蜡组成。根据需要,可以使用更高或更低比例的粘结剂,例如比例为51重量%、52重量%、56重量%、58重量%或60重量%的粘结剂。石蜡的比例始终保持相同。在每种情况下,木纤维的比例与粘结剂的比例相适应。载板的厚度为8mm。然而,厚度可以在例如4mm与12mm之间选择而没有困难;在特定情况下或相应地针对特定用途,也可以选择更小或更大的厚度。厚度为4.5mm的载板也是特别典型的。载板是通过将粘结剂和纤维混合、将纤维饼散布并在压机中进行压制而生产,其中,作为典型,压板或循环金属带在压力和升高的温度下作用在纤维饼或相应地平面材料的顶面和底面上。对于以下实验,载板具有2800mm×2070mm的大尺寸。对于下述示例性实施方案,使用载板作为未涂覆的板。
任选地,可以在施加涂层之前对载板进行打磨。每侧的打磨损失为0.1mm至0.15mm;因此,总打磨损失为原始总板厚度的0.1mm至0.3mm。
就以下示例性实施方案中说明的范围而言,例如对于装饰性原纸、印刷墨的数量或所使用的清漆、合成树脂或热熔体的量,我们注意到本发明可以在整个说明的范围内实施。范围的说明简单地显示了根据本发明的方法的灵活性,或者相应地显示了根据本发明的工件的涂层多样性的可能性。这同样适用于替代实施方案的说明,例如用于施加印刷墨或墨或用于施加涂层。
就在下文中描述的合成树脂的使用而言,通常使用这样的合成树脂:其包含或可以包含常用的辅助物质,例如硬化剂、润湿剂等,其量通常为所使用的合成树脂的总量的1重量%至5重量%。
示例性实施方案1
用纸组合件压制的载板
将装饰性纸和覆盖层放在载板的顶面上,将任选使用的背衬放在载板的底面下,并且将由三层或相应地四层制成的该经压制的材料堆叠体在短周期压机中进行压制。分别使用覆盖层、装饰性纸和任选使用的背衬作为经合成树脂浸渍的纸。
对于示例性实施方案1,使用装饰性纸作为用于涂覆总重量为110g/m2至200g/m2的载板的浸渍纸,基于
-重量为50g/m2至90g/m2的装饰性原纸,以及
-具有1至6种颜色的装饰性附加印刷由以模拟方式(例如通过印刷辊)和/或以数字方式(例如通过喷墨印刷机)施加的着色墨生产。墨是基于水的,因此其可以在施加之后用热空气干燥,或者墨可以被UV固化,并且可以在施加之后用UV辐射固化。此外,为了生产装饰性浸渍纸,
-基于脲树脂或三聚氰胺树脂或两种树脂的混合物进行在印刷之前或之后进行的树脂浸渍,其中将合成树脂作为液体或作为固体,特别是以粉末形式施加。然后将合成树脂干燥,但还未固化,直到其具有60g/m2至110g/m2的重量以状态B存在。
此外,将总重量为120g/m2至400g/m2的作为浸渍纸的覆盖层用作涂层,基于
-重量为3g/m2至70g/m2的原纸,其中优选使用重量为10g/m2至25g/m2的轻质原纸,
-基于三聚氰胺树脂的树脂浸渍以水样形式或作为固体,特别是以粉末形式施加,并且其在干燥之后具有85g/m2至280g/m2的重量以状态B(意指还未固化)存在,以及
-以5g/m2至50g/m2,优选10g/m2至15g/m2的量用规格为F 180至F 240(根据FEPA标准)的刚玉进行填充,其中将刚玉散布或者以与合成树脂的混合物施加。
最后,任选地使用总重量为150g/m2至240g/m2的作为浸渍纸的背衬,基于
-重量为70g/m2至120g/m2的原纸
-基于脲树脂和/或三聚氰胺树脂或两种树脂的混合物的树脂浸渍以水样形式或作为固体,特别是以粉末形式施加;具有80g/m2至120g/m2的重量以状态B存在。
或者除了背衬之外,通常可以将脚步声隔音材料,例如一层纸板或硬纸板或EPS通过粘合剂通过意指通过粘附脚步声隔音材料的层合来附接至载板的底面。
工件上涂层的进一步生产在所生产的经压制的材料堆叠体中进行,所述经压制的材料堆叠体从顶部至底部具有作为浸渍纸的覆盖层、作为浸渍纸的装饰性纸、载板和任选的作为浸渍纸的背衬。将压制的产品堆叠体在短周期热压机中进行压制以形成层合体,其中短周期压机具有作用在覆盖层上的上压板和作用在载板的底面或背衬上的下压板,其中短周期压机如下调节:
-在压板上测量的在至少25kg/cm2的增加的压力和180℃至220℃,优选200℃的升高的温度的作用下,
-并且压制时间为6秒至30秒
-同时通过上压板形成表面结构,所述上压板任选地具有至少部分适应于装饰品的结构(称为“配准压纹(embossed in register)”)。
以这种方式生产的经涂覆的载板在水的影响下也具有尺寸稳定性;其不会溶胀,并且也不显示出外观的变形,意指没有弯曲或扭曲。
示例性实施方案2
可以将单层或多层清漆层施加至覆盖层,在覆盖层中依据根据示例性实施方案1的经涂覆的工件压纹有结构,特别是为了调节表面特性,例如表面的光泽、高光泽或哑光效果,或者为了产生抗指纹特性。优选施加清漆作为UV清漆,通常以两层至三层施加,其中优选在多层清漆施加的情况下,在施加每个清漆层之后使已经施加的层部分地塑化。在施加最后的清漆层之后,使清漆层完全固化。可以任选地改善清漆层对覆盖层的粘附力,因为在施加清漆之前将底漆施加至覆盖层。
覆盖层上的清漆施加的典型实例例如通过基于水的清漆(称为水清漆(hydrovarnish))例如可UV固化的丙烯酸类清漆进行。将10g/m2的清漆的第一层施加至覆盖层的表面并部分塑化。该层充当覆盖层的合成树脂与以下的清漆层之间的粘合剂。例如,为了获得总层厚度为50g/m2的清漆涂层,向第一层施加28g/m2的水清漆的第二层,然后分别施加5.5g/m2的水清漆的两个另外的层。在各层之后,可以使所施加的清漆部分塑化;在施加所有的层之后,使所施加的清漆完全固化。清漆可以通过倾倒、喷涂、辊涂或利用刮刀以任何方式施加。
优选地,通常在最后的层中或最后的两个层中清漆层补充有直径优选为1μm至5μm的刚玉,以改善清漆表面的耐刮擦性。优选将刚玉散布到还未固化的清漆层中。因此装饰品通过压纹结构进一步开发并且通过清漆涂层进一步得到保护。
用于在合成树脂表面上的清漆施加的这种方法适合于,例如,根据EN 16511创建使用等级23至34的层合体。之后,将经涂覆的载板分成长度为1000mm至2800mm且宽度为90mm至500mm的矩形面板。榫槽类型的连接装置在面板上在四个侧面上插入,所述连接装置任选地配备有锁定元件以形成锁定型材(locking profile),在锁定型材中相邻面板在水平和垂直方向上放置并以浮动结合锁定(称为点击面板(click panels)),其中连接装置和/或锁定元件由载板的核心材料组成并且为此由核心材料雕刻,或者其中锁定元件作为其中引入有锁定型材并且附接至载板的侧表面的单独元件执行。
以这种方式生产的作为层合体的经涂覆的载板是防水的且尺寸稳定。它尤其可以用作地板、墙壁或天花板覆盖物,作为用于室内建筑的结构元件,作为用于室外建筑的结构元件,用于车辆构造,或者用于设计外观。
示例性实施方案3
具有层合在其上的由PVC制成的层的载板
将PVC层作为涂层层合到如上所述的载板上。为此,将粘合剂例如以60g/m2至100g/m2的量施加至载板的顶面。为了固定PVC层,可以使用所有的热熔粘合剂;然而,优选基于聚氨酯的防水热熔粘合剂。将外侧设置有装饰品的PVC层的内侧放在载板上的粘合剂上。PVC层通常为1mm至5mm厚。
将由载板、粘合剂和PVC层构成的堆叠体在层压机中在施加压力和通常升高的温度下进行压制,直至热熔粘合剂基本上发挥其粘合能力。
可以使用涂覆有PVC的载板例如作为用于地板覆盖物的防水面板,而且用于户外建筑中的结构,例如用于外观或结构元件例如隔离墙或隐私屏蔽墙。
示例性实施方案4
具有包括装饰性直接印刷体的液体覆盖层的载板
生产在这种情况下为涂覆有液体合成树脂的载板的工件,其中使用直接印刷预先将底漆施加至载板上,然后将装饰品施加至该底漆上。然后用作为液体施加的合成树脂的层覆盖该直接印刷体,其中将刚玉引入到非外部层中。使以这种方式涂覆的载板在短周期压机(SC压机)中固化。具体地,来自示例性实施方案2的涂层如下施加:
·借助三聚氰胺树脂、脲树脂或两种合成树脂的混合物对板进行打底,以约20g/m2至30g/m2(固体含量:三聚氰胺树脂:合成树脂的总施加量的约65重量%,脲树脂:合成树脂的总施加量的约50重量%)的量以液体形式作为涂层施加。使用辊进行施加。
·借助空气循环干燥器或IR辐射器将树脂干燥至约20%的含水量。
·分别以5g/m2至10g/m2(固体含量:约50重量%)的量以液体形式重复施加彩色底漆(例如,颜料和粘合剂例如酪蛋白或玉米蛋白的混合物)以及例如通过空气循环或IR辐射器进行中间干燥。彩色底漆的施加也通过辊施加进行。在这种情况下优选使用白色颜料(二氧化钛、碳酸钙、硫酸钡)。
·以约10g/m2至20g/m2的量施加液体底漆例如异氰酸酯底漆以改善随后施加的层的粘附力。通过空气循环干燥器或IR辐射器将底漆干燥。在此再次使用辊施加。
·以模拟方式(例如通过辊)或以数字方式(例如利用具有基于水的墨的喷墨打印机)将装饰品印刷到其粘附力已经通过底漆改善的表面上,然后如有必要通过空气循环干燥器将墨干燥。
·通过辊施加施加作为涂层的密封剂,其中液体密封剂由三聚氰胺树脂(固体含量约65重量%)和混合到其中的玻璃球(玻璃球的直径:70μm至90μm)组成。施加量为20g/m2至30g/m2。然后,
·使用空气循环或IR辐射器对合成树脂进行干燥但不固化,直至达到B状态,然后冷却并暂时储存。
·在辊施加中将由液体三聚氰胺树脂制成的另一个涂层以约60g/m2至80g/m2(固体含量约65重量%)的量施加至板的经印刷并且已经通过合成树脂的层密封的侧面。
·借助散布装置将刚玉散布到未干燥的液体三聚氰胺树脂上。刚玉根据FEPA标准的晶粒尺寸为F180至F240。根据期望的耐磨性,刚玉的量为10g/m2至50g/m2。
·以每层20g/m2至40g/m2的量在板的顶面上重复施加(优选多至5层)三聚氰胺树脂的涂层,其中三聚氰胺树脂具有上述的固体含量。在最后的层的施加期间,将玻璃球(直径:70μm至90μm)添加至树脂中。在每次施加之后,借助空气循环或IR辐射器进行中间干燥。
·也可以与顶面上的涂层平行,在板的背侧上进行作为背衬的液体三聚氰胺树脂的施加。这可以在部分辊施加设备中进行,例如达到100g/m2至140g/m2的总量。三聚氰胺树脂通常具有上述的固体含量。此外,合成树脂还可以包含染料或颜料。在这种情况下,也通过空气循环或通过IR辐射器进行中间干燥。
·然后,将在一面或两面上涂覆的载板在短周期热压机中进行压制以形成层合体,如示例性实施方案1中已经描述的,
-在至少25kg/cm2的增加的压力和200℃的升高的温度的作用下
-并且压制时间为6秒至30秒
-同时在装饰品上方形成表面结构;任选地彼此适应,称为“配准压纹”。
如果需要对经涂覆的载板进行进一步加工,这可以以与示例性实施方案1中描述的相同方式进行。还可以以相同的方式进行经涂覆的载板或由经涂覆的载板生产的面板的用途。根据示例性实施方案4涂覆的载板的特性与根据示例性实施方案1的经涂覆的载板的特性相当。
对于具有根据该示例性实施方案4的涂层的载板,经合成树脂浸渍的纸也可以代替作为液体施加的合成树脂用作背衬。或者,纸板或EPS层也可以通过粘合剂固定至载板的底面。
示例性实施方案5
具有包括装饰性直接印刷体的热熔覆盖物的载板
·将白色着色的聚氨酯热熔体(PU热熔体)以液体或相应地熔融状态作为涂层施加至载板(施加量:约60g/m2至120g/m2)。热熔体优选以各自5g/m2至20g/m2的多层施加。借助辊施加设备在120℃的温度下,在载板的表面或顶面上进行作为液体的施加,在这种情况下,载板用作工件。如有必要,然后在第二施加设备中进行仍是液体的热熔体的平滑。颜料在PU制剂中的比例为约20重量%。
·表面的冷却
·根据第一替代方案:利用数字印刷机印刷白色液体彩色层(施加量:10g/m2至20g/m2),然后任选地例如利用红外线干燥器或空气循环干燥器将彩色层干燥。
·借助数字印刷机使用基于水的墨或UV墨在表面上印刷装饰品,然后任选地例如利用UV干燥器或空气循环干燥器将墨干燥。
·根据第二替代方案:将浸渍有固化的合成树脂的装饰性纸或装饰性纸膜放在仍是液体的热熔体上,并在层压机中在压力以及大多数情况下也升高的温度的作用下使粘合剂活化,直至达到期望的粘合能力。80℃至150℃的温度,以及150N/cm2至350N/cm2的压力是典型的。
·对于以上两种替代方案:借助辊施加单元,施加另一涂层,在这种情况下是非着色的,优选透明的PU热熔层(施加量:50g/m2)。
·任选的:借助散射装置(施加量:10g/m2至50g/m2,取决于期望的耐磨性)将刚玉颗粒散布到热熔体中(晶粒尺寸:根据FEPA标准为F180至F240)。
·利用辊施加单元施加另一PU层(施加量:约30g/m2)。
·表面的冷却。
·任选的:用包含约30g/m2的由刚玉制成的纳米颗粒的UV清漆对表面进行涂漆以改善耐刮擦性(清漆施加量:10g/m2至40g/m2),以及随后进行UV固化。
这种经涂覆的载板也可以分成如示例性实施方案1中描述的并且设置有边缘轮廓的面板。使用根据示例性实施方案5的经涂覆的载板并且如果适用,由其生产的面板也如示例性实施方案1中描述。
示例性实施方案6
层合在多层塑料膜上并施加UV清漆
描述了用多层塑料膜涂覆在这种情况下为载板的工件,其各层通过粘合剂或合成树脂彼此连接,并且例如通过粘合剂与载板的顶面连接。塑料膜具有设置有装饰品的即用型表面。此外,施加UV清漆作为密封剂。在载板的相反侧上,在这种情况下在底面施加背衬。通过以下生产经涂覆的载板
·借助辊施加设备将PU热熔体以约100g/m2的量施加至载板的底面
·在PU热熔体上放置由薄层合体、多层塑料膜或多层经合成树脂浸渍的纸组成的背衬。
·在层压机中对背衬进行压制。还用于以下层合过程的层压机在80℃至160℃的温度下以及150N/cm2至350N/cm2的压力下。层合可以例如在约120℃下在300N/cm2和0.8秒的压制持续时间下进行。
·将在底面上涂覆的载板旋转
·借助辊施加设备将约100g/m2的PU热熔体作为涂层施加至载板的顶面
·施加在每种情况下由内芯层和外部装饰性膜制成的多层装饰性塑料膜或多层经合成树脂浸渍的纸,然而,在这种情况下,在施加至载板的顶面的PU热熔体的层上没有作为涂层的耐磨层,然后
·在设计为连续压机的层压机中,在上述压制条件下,在当前情况下约120℃,在300N/cm2和1秒的压制持续时间下对膜进行压制,
·施加由多层(通常为2至5层)的UV清漆制成的涂层,其中非外部层包含用于增加耐磨性的刚玉和用于增加耐刮擦性的纳米颗粒(例如二氧化硅气凝胶),其中优选将用于增加耐刮擦性的颗粒施加至靠近涂层外部的清漆层中。
·利用UV或EBH辐射器在每次施加之后使单独的清漆层部分地塑化并且在最后施加之后进行最终固化,如以上在其他示例性实施方案中已经描述的。
这种经涂覆的载板也可以分成如示例性实施方案1中描述的并设置有边缘轮廓的面板。使用根据示例性实施方案6涂覆的载板并且如果适用,由其生产的面板也如示例性实施方案1中描述。
示例性实施方案7
在CPL/HPL上层合
示例性实施方案7与示例性实施方案6类似,但不是将装饰品、装饰性纸或装饰性膜作为涂层,而是将设置有装饰品的薄层合体(CPL或HPL)施加至具有耐磨层的工件上。因此可以在不施加清漆的情况下进行涂覆。进行以下:
·将PU热熔体以约100g/m2的量辊施加至板的底面
·将由薄层合体、塑料膜或纸组成的背衬放在工件(在这种情况下为载板)的底面上,
·在可以如上所述在示例性实施方案6中调节的层压机中,在这种情况下为连续压机,在约120℃,300N/cm2和约1秒的压制持续时间下对背衬进行压制,
·将载板旋转
·将PU热熔体的层以100g/m2的量辊施加至板的顶面
·放置设置有装饰品的CPL或HPL薄层合体,所述层合体满足例如EN 13329的对使用等级23至32的要求
·在层压机中在约120℃,300N/cm2的压力和1秒的压制持续时间下对组合件进行压制
如果需要对工件(在这种情况下为经涂覆的载板)进行进一步加工,这可以以与示例性实施方案1中描述的相同方式进行。还可以以相同的方式进行经涂覆的载板或由经涂覆的载板生产的面板的用途。根据示例性实施方案7涂覆的载板的特性与根据示例性实施方案1的经涂覆的载板的特性相当。
示例性实施方案8
具有合成树脂涂层和清漆的载板
使用胶水(例如:PVAc胶水、基于脲的胶水等),将装饰性饰面膜作为涂层层合到载板的顶面上,并将背衬层合到底面上。设置有装饰品的饰面膜的纸重量为约80g/m2并承有装饰性印刷体,背衬的纸重量为约60g/m2;饰面膜和背衬各自浸渍有合成树脂(例如三聚氰胺)。为了固定饰面膜和背衬,在每种情况下,在放置饰面膜或相应地背衬之前,将约60g/m2的量的胶水以液体形式施加至载板。
层合在连续压机中在约160℃的温度,20m/分钟的速度和300N/cm的压力下进行。
在胶水冷却和硬化之后,将含有刚玉的EBH清漆(EBH:电子束硬化)作为涂层以约90g/m2(刚玉含量:约15重量%)的量施加至饰面膜。利用UV辐射器使清漆部分塑化。然后施加EBH砂光基底(施加量:约80g/m2)并利用EBH辐射器部分塑化。之后,施加约20g的填充有纳米颗粒的面漆作为涂层以改善耐刮擦性。借助辊单元进行所有施加。然后利用另一个EBH辐射器使整个组合件硬化。
产品满足DIN EN 14978等级33的要求。
示例性实施方案9
具有基于清漆的涂层的载板
将第一预浸材料层合到载板的顶面上。第一预浸材料是浸渍有透明、着色但仍是透明的或半透明的清漆或浸渍有有色的通常不透明的清漆的纸,该纸已经通过将清漆干燥或相应地固化进行预浸渍。对于层合,首先将热熔体施加至载板上,然后放置第一预浸材料,然后将载板和第一预浸材料引导通过在示例性实施方案4或5中提及的条件下通过热熔体将第一预浸材料固定至载板的层合体系。如果使用着色或有色的清漆,则载板以底漆的方式显示出均匀的表面着色,在底漆上的施加于载板上的装饰品特别良好地显示。
在设置有预浸材料的该载板上,放置第二预浸材料作为另外的涂层,所述第二预浸材料也由浸渍有清漆并且任选地印刷有装饰品的纸组成。任选地,施加底漆以优化第二预浸材料在第一预浸材料上的粘附性。例如,可以施加砂光基底,意指允许施加另外涂层而无需打磨的清漆。以与对于第一预浸材料描述的相同的方式将第二预浸材料通过层合固定至第一预浸材料。或者,可以通过包含溶剂的粘合剂将第二预浸材料固定至第一预浸材料。
然而,现在将至少单层、优选多层清漆涂层施加至涂覆有第一预浸材料和第二预浸材料的载板。典型地,施加两个或三个清漆层。任选地,可以将底漆施加至第二预浸材料以改善清漆层与预浸材料的结合。或者,将清漆引入到第二预浸材料中并且与随后施加的清漆层彼此匹配,使得清漆层良好地粘附至第二预浸材料的清漆。
任选地,将脚步声隔音材料施加至载板的底面。
示例性实施方案10
具有单板的载板
将根据本发明的载板仅在顶面上或者顶面和底面上用由橡木制成的单板覆盖。如果将单板仅施加至顶面,则将背衬有利地施加至底面以防止板的变形。
将粘结剂或由于其粘附作用而固定单板的粘合剂,在这种情况下优选将部分交联的粘结剂引入到单板与载板之间。
部分交联的粘结剂有利地为合成树脂,有利地为热固性塑料,特别是氨基塑料;优选地,粘结剂具有三聚氰胺树脂,例如作为三聚氰胺-甲醛树脂。粘结剂可以以刚好足以将单板固定到载板的顶面或相应地底面的量使用。优选地,过量使用粘结剂使得粘结剂渗入单板中,可能透过单板。粘结剂可以任选地以浸渍有粘结剂的纸的形式引入。纸可以对称地用粘结剂浸渍或者可以将过量的粘结剂施加至纸的至少一侧上。粘结剂用于以液体形式浸渍纸并且随后以部分交联状态干燥。或者其也可以部分地以粘附到对纸进行浸渍的仍是液体的部分交联的粘结剂上的固态,例如作为粉末或粉尘使用。或者粘结剂也可以直接施加至单板或者载板的顶面或相应地底面。
将单板通过压机固定至载板。如果使用粘合剂来固定单板,则例如可以使用本身已知的真空压机用于固定。
如果使用粘结剂来固定单板,则例如可以使用短周期压机,其中合成树脂随后在100℃至240℃的温度和25N/mm2至50N/mm2的压力下在20秒至60秒内进行交联使得其固化。
在这种情况下,在交联期间为液体的合成树脂至少部分渗入单板中;任选地,特别是如果使用过量的粘结剂,则粘结剂至少部分地透过单板。根据一个优选替代方案,使用过多的粘结剂以使合成树脂完全透过单板并形成载板涂层的外表面。在提及的压力下,单板通常也被压缩。当使用粘结剂时,单板在压制之后更耐压并且提供了与未压缩的单板相比较不易损的表面。
以与粘结剂相同的方式,聚氨酯预聚物(PU预聚物)可以可替代地用于直接施加到载板或单板的表面上。通过使PU预聚物固化以形成聚氨酯,将单板粘结到载板上。由于与芳族异氰酸酯相比的改善的耐光性,因此优选脂族异氰酸酯作为聚氨酯预聚物;如果不担心黄化或变色,也可以使用芳族异氰酸酯作为聚氨酯预聚物。单板和载板可以在对于粘结剂的上述压制条件下例如在短周期压机中被压制在一起。
可以将添加剂施加至粘结剂的面向单板的表面。添加剂可以影响例如颜色、导电性或耐光性。添加剂也可以彼此组合使用。如果将添加剂施加至粘结剂的表面,则添加剂在压机中交联期间然后通过液化的粘结剂传送通过单板至粘结剂透过单板的程度。以这种方式,以较少使用的添加剂实现最大效果。
用单板以这种方式覆盖的载板可以被进一步涂覆,特别是密封以对抗水分的影响,例如可以对单板进行涂漆。
如果粘结剂形成单板载板的表面,或者如果随后施加密封剂以保护其免受水分影响,则然后防水载板可以在潮湿的房间中与装饰性的仍是防水的涂层一起使用,例如作为地板覆盖物或用于家具,特别是浴室或厨房家具,或用于装备桑拿室或游泳池。
Claims (13)
1.一种用于涂覆平面工件的方法,其中所述平面工件由具有木质纤维素纤维和比例大于50重量%的三聚氰胺-甲醛树脂、酚醛树脂、亚甲基二苯基异氰酸酯(MDI)、还以乳化形式作为eMDI的亚甲基二苯基异氰酸酯、聚合二苯基甲烷二异氰酸酯(PMDI)或前述粘结剂的混合物粘结剂的材料生产,所述方法具有以下步骤:
-提供具有顶面和底面以及侧表面的所述平面工件,
-施加涂层,
-施加装饰品,
-任选地,在顶面、底面或侧表面的每种情况下的至少一部分上使所述涂层结构化,以及
-使所述涂层固化。
2.根据权利要求1所述的方法,其特征在于,所述涂层选自可热固化的合成树脂,例如三聚氰胺树脂、清漆,例如可UV固化的清漆、或热熔体。
3.根据权利要求1或2所述的方法,其特征在于,将所述涂层作为液体涂层、作为粒状涂层以纸的形式和/或以膜的形式施加。
4.根据前述权利要求中的一项所述的方法,其特征在于,所述涂层为单层或多层。
5.根据前述权利要求中的一项所述的方法,其特征在于,使所述涂层在压力和/或温度的作用下固化。
6.根据前述权利要求中的一项所述的方法,其特征在于,使所述涂层通过辐射,特别是电子固化辐射或UV辐射而固化。
7.根据前述权利要求中的一项所述的方法,其特征在于,所述结构化通过机械手段或化学手段建立。
8.根据前述权利要求中的一项所述的方法,其特征在于,所述涂层设置有骨料。
9.一种平面工件,所述平面工件由具有木质纤维素纤维和大于50重量%的三聚氰胺-甲醛树脂、酚醛树脂、亚甲基二苯基异氰酸酯(MDI)、还以乳化形式作为eMDI的亚甲基二苯基异氰酸酯、聚合二苯基甲烷二异氰酸酯(PMDI)或前述粘结剂的混合物粘结剂的材料生产,其中所述平面工件具有顶面、底面和侧表面,其特征在于,所述顶面、所述底面、或至少一个侧表面至少部分地设置有涂层,所述涂层具有装饰品和任选的结构,所述涂层被固化到平面工件上。
10.根据权利要求9所述的平面工件,其特征在于,在所述工件与所述涂层之间施加底漆或者向涂层施加底漆。
11.根据权利要求9或10所述的平面工件,其特征在于,在所述工件与所述涂层之间施加粘合剂。
12.根据权利要求9至11中的一项所述的平面工件,其特征在于,面向彼此的至少两个侧表面具有轮廓。
13.根据权利要求9至12所述的具有涂层的平面工件作为地板覆盖物、墙壁覆盖物、天花板覆盖物的用途。
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JP2009074249A (ja) * | 2007-09-19 | 2009-04-09 | Dainippon Printing Co Ltd | 床材 |
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-
2020
- 2020-01-09 CN CN202080029160.2A patent/CN113710441B/zh active Active
- 2020-01-09 CA CA3137235A patent/CA3137235A1/en active Pending
- 2020-01-09 WO PCT/EP2020/050451 patent/WO2020211988A1/de active Application Filing
- 2020-01-09 BR BR112021020749A patent/BR112021020749A2/pt not_active Application Discontinuation
- 2020-01-09 AU AU2020259631A patent/AU2020259631A1/en not_active Abandoned
- 2020-01-09 CN CN202410418823.XA patent/CN118181424A/zh active Pending
- 2020-01-09 EP EP20701537.1A patent/EP3934871A1/de active Pending
- 2020-01-09 AU AU2020258486A patent/AU2020258486A1/en not_active Abandoned
- 2020-01-09 WO PCT/EP2020/050452 patent/WO2020211989A1/de active Search and Examination
- 2020-01-09 CA CA3134193A patent/CA3134193A1/en active Pending
- 2020-01-09 JP JP2021559135A patent/JP2022530186A/ja active Pending
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- 2020-01-09 US US17/604,544 patent/US20220306821A1/en active Pending
- 2020-01-09 UA UAA202105798A patent/UA129218C2/uk unknown
- 2020-04-17 EP EP20170128.1A patent/EP3736095B1/de active Active
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EP3736095A2 (de) | 2020-11-11 |
CA3137235A1 (en) | 2020-10-22 |
WO2020211988A1 (de) | 2020-10-22 |
CA3134193A1 (en) | 2020-10-22 |
CN113710441B (zh) | 2023-12-26 |
AU2020258486A1 (en) | 2021-12-02 |
EP3736095A3 (de) | 2021-01-27 |
EP3736095C0 (de) | 2024-07-31 |
EP3934871A1 (de) | 2022-01-12 |
US20220306821A1 (en) | 2022-09-29 |
JP2022530186A (ja) | 2022-06-28 |
CN113840701A (zh) | 2021-12-24 |
CN113710441A (zh) | 2021-11-26 |
WO2020211989A1 (de) | 2020-10-22 |
UA129218C2 (uk) | 2025-02-12 |
EP3736095B1 (de) | 2024-07-31 |
BR112021020749A2 (pt) | 2021-12-14 |
AU2020259631A1 (en) | 2021-11-04 |
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