CN108894053A - 一种适合机内高速生产的热升华转印纸 - Google Patents

一种适合机内高速生产的热升华转印纸 Download PDF

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CN108894053A
CN108894053A CN201810983974.4A CN201810983974A CN108894053A CN 108894053 A CN108894053 A CN 108894053A CN 201810983974 A CN201810983974 A CN 201810983974A CN 108894053 A CN108894053 A CN 108894053A
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赵慧哲
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Abstract

本发明提出了一种适合机内高速生产的热升华转印纸,包括原纸、以及以机内加工的工艺依次涂覆在原纸上的施胶层和涂料层,所述涂料层中的涂料至少由吸水材料、吸墨材料和树脂配制而成,其特征在于,所述吸水材料含聚丙烯酸钠树脂、硅酸铝、煅烧高岭土和二氧化硅中的一种或多种任意比例的组合物,所述吸墨材料含羧甲基纤维素钠、聚丙烯酰胺、海藻酸钠、氧化淀粉和天然高分子胶中的一种或多种任意比例的组合物。该工艺生产的热升华转印纸解决了现有技术中机内涂布法制备的热升华转印纸吸墨量不足、转印率低、墨水渗透率高且印花精度低的不足的问题。

Description

一种适合机内高速生产的热升华转印纸
技术领域
本发明涉及热升华转印纸,具体涉及一种适合机内高速生产的热升华转印纸。
背景技术
传统的印花技术受制版的局限性,个性化生产难度高、图案的结构简单及精确度差,且油墨使用量高,污染大等缺点已经难以满足市场的需求。但随着技术的进步,热升华转印技术可广泛应用在:纺织品、瓷杯、瓷盘、瓷板、金属等材质的加工领域,加上数码印花机灵活的生产方式,大小单、传统的和个性化需求的订单都能生产,极大地改变传统印花产业生产的局限性,且其生产方便、设备投入低、操作简单等优点得到快速的推广。
近些年,数码印花市场中热升华转印纸需求一直保持较快增长,也加入了许多大、小纸厂投入该纸种的研发和生产中,这也导致了国内产品的层次不一。就产品而言,国内产品按涂布方式分类可分为机内涂布和机外涂布两种:(1)机内涂布是指在纸机上从网部成型到施胶涂布,只经一道工艺制成的热升华转印纸;此涂布方式因原纸表面施胶和机内涂料嵌入原纸纤维内使得表面涂层成膜性相对机外涂布性能下降,其产品基本上皆存在吸墨量不足、转印率低、墨水渗透率高且印花精度低的不足。(2)机外涂布是指纸机生产的原纸通过纸机外的涂布机再加工一道或二道以上的涂层,其生产的热升华转印纸吸墨量好、转印率高、印花精度高,但同时具备干燥速度慢、生产效率低、成本相对高的不足。
因此,随着印花技术的快速发展,尤其单pass高速数码印花机的应用,迫使热升华转印纸朝着具备更快的干燥速度、更低的成本且更高的转移率方向发展,这也为高速纸机通过机内涂布生产具备干燥速度快、转移率高的热升华纸提出了新要求。
发明内容
本发明的目的在于提供一种适合机内高速生产的热升华转印纸及其制备方法,解决了现有技术中机内涂布法制备的热升华转印纸吸墨量不足、转印率低、墨水渗透率高且印花精度低等技术缺陷。
为实现上述目的,本发明提出如下技术方案:一种适合机内高速生产的热升华转印纸,包括原纸、以及以机内加工的工艺依次涂覆在原纸上的施胶层和涂料层,所述涂料层中的涂料至少由吸水材料、吸墨材料和树脂配制而成,其特征在于,所述吸水材料含聚丙烯酸钠树脂、硅酸铝、煅烧高岭土和二氧化硅中的一种或多种任意比例的组合物,所述吸墨材料含羧甲基纤维素钠、聚丙烯酰胺、海藻酸钠、氧化淀粉和天然高分子胶中的一种或多种任意比例的组合物,所述树脂含水性苯丙聚合物乳液、乙酸乙烯酯-乙烯共聚乳液、聚乙烯醇、丁苯胶乳的一种或多种任意比例的组合物。
优选地,所述吸水材料至少采用聚丙烯酸钠树脂,所述吸墨材料至少采用聚丙烯酰胺,所述树脂至少采用乙酸乙烯酯-乙烯共聚乳液。
优选地,所述涂料层中的所述吸水材料、吸墨材料、树脂按质量份计分别为10-40份、20-50份、5-10份。
优选地,所述施胶层至少由施胶剂、填充材料配制而成,其中施胶剂、填充材料按质量份计分别为50-90份、10-30份。
优选地,所述施胶剂含烷基烯酮二聚体、烯基琥珀酸酐、羧甲基纤维素、苯乙烯-马来酸酐共聚物、改性氧化淀粉中的一种或多种任意比例的组合物。
优选地,所述填充材料含煅烧高岭土、硅酸铝、二氧化硅和沙丁白中的一种或多种任意比例的组合物。
优选地,所述施胶层通过表面施胶方式至原纸的内表层,所述涂料层以机内涂布方式加工至原纸表面的施胶层上。
与现有技术相比,本发明的有益效果:
本发明对现有技术中的热升华转印纸的成分以及成分的比例进行改进,使得热升华转印纸的干燥速度更快,转移率高,能够适用不低于500m/min的车速进行机内一次成型的高速生产,并且印花精度高;
涂料层中的吸水材料采用聚丙烯酸钠树脂提高了涂料的吸水性能,特别是硅酸铝形成的组合物进一步提高了吸水性能,同时通过混合其它的成分能够降低生产成本;
吸墨材料采用吸墨性能更好的聚丙烯酰胺以提高涂料层的吸墨性能,同时也可以与现有技术中通常使用的羧甲基纤维素钠形成组合物,在相比现有技术提高吸墨性能的同时,也不会过多地增加生产成本。
附图说明
图1为本发明中热升华转移纸的结构示意图。
具体实施方式
下面将结合示意图对本发明的具备高速纸机生产的热升华转印纸及其生产方法进行更详细的描述,其中表示了本发明的优选实施例,应该理解本领域技术人员可以修改在此描述的本发明,而仍然实现本发明的有利效果。因此,下列描述应当被理解为对于本领域技术人员的广泛知道,而并不作为对本发明的限制。
实施例一
请参见图1,本发明热升华转印纸包括原纸1、沿着原纸1的厚度方向依次覆盖在原纸1的一侧的由柔软的高分子胶形成的施胶层2和涂料层3,通过施胶层能够减少涂料层的墨水向原纸渗透。在施胶时,所述施胶材料能够渗透到所有涂覆有施胶材料的原纸1内。
所述施胶层2的胶料由施胶剂、填充材料及助剂配制而成,其中施胶剂、填充材料及助剂按质量份计分别为30-80份、10-30份、1-10份。所述施胶剂含聚乙烯醇、烷基烯酮二聚体、烯基琥珀酸酐、羧甲基纤维素、苯乙烯-马来酸酐共聚物、改性氧化淀粉中的一种或多种任意比例的组合物,施胶剂能够快速吸干涂料中的水分以提高干燥速度。所述填充材料含煅烧高岭土、硅酸铝、二氧化硅和沙丁白中的一种或多种任意比例的组合物。
所述助剂可以是杀菌剂、消泡剂、交联剂中的一个或者几种。
优选地,所述施胶层2的施胶材料可以以辊式施胶的方式施胶至原纸1的一侧。
所述涂料层3采用机内涂布的方式将涂料涂布在原纸1上有施胶层2的一侧,所述涂料层3的涂料具体由吸水材料、吸墨材料、树脂及助剂配制而成,其中吸水材料、吸墨材料、树脂及助剂按质量份计分别为10-40份、20-50份、5-10份、1-10份。所述吸水材料含聚丙烯酸钠树脂、硅酸铝、煅烧高岭土和二氧化硅中的一种或多种任意比例的组合物,优选为采用聚丙烯酸钠树脂或者聚丙烯酸钠树脂与硅酸铝、煅烧高岭土和二氧化硅中的一种或多种任意比例的组合物。所述吸墨材料含羧甲基纤维素钠、聚丙烯酰胺、海藻酸钠、氧化淀粉和天然高分子胶中的一种或多种任意比例的组合物,优选为采用聚丙烯酰胺和羧甲基纤维素钠的组合物。所述树脂采用水性苯丙聚合物乳液,通过树脂能够提高涂料层的牢固度,同时提高湿摩擦性能。
所述助剂可以是杀菌剂、消泡剂、防泡剂、交联剂中的一个或者几种。
实施例二
该实施例为生产实施例一中的热升华转印纸的方法。
所述方法为从原纸成型到表面施胶再到机内涂布一次成型的机内生产,具体包括如下步骤:
步骤一:抄造原纸1。
将用以制作原纸1的浆料在高速纸机上经网部成型干燥后获得未施胶原纸1。其中,原纸1浆料的成分及配制均采用本领域常用的原纸1浆料的成分及配制方式即可,故在此不再赘述。
步骤二:在高速纸机内以辊式施胶的方式将胶料嵌入到步骤一得到的原纸1的内表层中形成施胶层2,其中施胶量为0.5-2g/m2
在施胶之前,需要配置用以配置施胶层2的胶料,配置方式如下:将聚乙烯醇40份、羧甲基纤维素10份、改性氧化淀粉30份、高白硅酸铝10份、助剂10份和水按比例混合,得到固含量为10~20%的胶料。当然,胶料配置所需各成分的比例只要满足实施例一中关于胶料各成分比例关系即可。
步骤三:在高速纸机内以机内涂布的方式将涂料涂布在施胶后的原纸1的表面,涂布量为3-7g/m2
机内涂布包括浸渍、刮辊式、辊式和计量棒中一种或多种涂布方式配套使用。
在涂布之前,需要配置涂料,配置方式如下:将聚丙烯酸钠树脂10份、煅烧高岭土30份、聚丙烯酰胺20份、羧甲基纤维素钠28份、水性苯丙聚合物乳液10份、助剂2份和水按比例混合即可得到固含量为20-40%的涂料。同样,涂料的成分的比例只需要满足实施例一中限定的比例关系即可。
优选地,为了达到更好的涂布效果,在步骤二完成施胶后,需要对施胶后的原纸1进行初步干燥和压光。
步骤四,对步骤三得到的产品进行干燥、收卷、分切、复卷等工艺后最终得到热升华转印纸。
上述制造转印纸的步骤也可以采用现有技术中的其它方式。
在生产过程中,高速纸机的车速为500m/min以上。
实施例三
该实施例是对实施例一中的热升华转印纸的干燥速度和转移率与现有技术中的热升华转印纸的干燥速度和转移率进行对比,具体地,分别采用现有技术中的两个案例:案例一,市面上销售的机外涂布的热升华转印纸;案例二,市面上销售的机内涂布的热升华转印纸。
以下通过热升华转印纸的干燥速度和转移率两项重要技术指标进行进一步描述。
(1)干燥速度
热升华转印纸打印干燥速度通常是结合实际应用情况,开发以接、粘为原理的打印干燥速度的评价方法。即选择较深颜色(较深颜色图案打印墨量大,打印后通常干燥速度较慢)的色块进行打印,打印后自然放置,一定时间后,利用热升华转印纸的背面以一定压力对色块进行接触、粘贴,如此反复选择不同自然放置时间的色块进行接粘,直至热升华转印纸的背面粘不下来色块颜色为止,即说明色块已经形成表面干燥,此时的放置时间即为打印干燥时间,时间越短干燥速度越快。通过上述原理对实施例一、案例一、案例二的热升华转印纸进行打印后进行干燥,得到表1。
表1不同案例的干燥所需时间
通过表1中的数据可知,实施例一中的热升华转印纸的干燥速率优于案例一和案例二。
(2)转移率
本评价方法模拟实际打印及转印过程,即利用四色台式喷墨打印机,将一定面积的四色(100%C、100%M、100%Y、100%K)色块图案打印在数码热升华转印纸上,干燥后,利用平板转印机将色块转印到白色100%涤纶布上,转印温度设定200℃,时间为30s。参照《GB/T 18722-2002印刷技术反射密度测量和色度测量在印刷过程控制中的应用》标准中反射密度的测量要求,利用反射密度计分别测试转印后布上的四色色块密度,即为转印色密度;分别测试转印后残留在纸上的四色色块的密度,即为残留色密度,可以采用爱色丽528以上型号的色密度计进行测试。利用反射密度计测试转印后布上各色块的色密度,其数值即为转印色密度。
转移率定义为:转印色块密度与转印色块密度、残留色块密度之和的比值,取百分数即为色块转移率,即转移率=转印色密度/(转印色密度+残留色密度)×100%。
通过上述原理,对实施例一、案例一以及案例二中的热升华打印纸进行对比,得到表2。
表2不同案例的转移率的对比结果
从表2的数据可以看出,实施例一的转移率达到案例一的高转移率水平,并且远高于案例二的转移率,说明实施例一的转移率也能够达到很高的水平。
通过上述对比可知,本发明的热升华转印纸的干燥速度和转移率都优于现有技术,因此,能够使用更高速度的生产。
上述仅为本发明的优选实施例而已,并不对本发明起到任何限制作用。任何所属技术领域的技术人员,在不脱离本发明的技术方案的范围内,对本发明揭露的技术方案和技术内容做任何形式的等同替换或修改等变动,均属未脱离本发明的技术方案的内容,仍属于本发明的保护范围之内。

Claims (7)

1.一种适合机内高速生产的热升华转印纸,包括原纸、以及以机内加工的工艺依次涂覆在原纸上的施胶层和涂料层,所述涂料层中的涂料至少由吸水材料、吸墨材料和树脂配制而成,其特征在于,所述吸水材料含聚丙烯酸钠树脂、硅酸铝、煅烧高岭土和二氧化硅中的一种或多种任意比例的组合物,所述吸墨材料含羧甲基纤维素钠、聚丙烯酰胺、海藻酸钠、氧化淀粉和天然高分子胶中的一种或多种任意比例的组合物,所述树脂含水性苯丙聚合物乳液、乙酸乙烯酯-乙烯共聚乳液、聚乙烯醇、丁苯胶乳的一种或多种任意比例的组合物。
2.根据权利要求1所述的一种适合机内高速生产的热升华转印纸,其特征在于,所述吸水材料至少采用聚丙烯酸钠树脂,所述吸墨材料至少采用聚丙烯酰胺,所述树脂至少采用乙酸乙烯酯-乙烯共聚乳液。
3.根据权利要求1所述的一种适合机内高速生产的热升华转印纸,其特征在于,所述涂料层中的所述吸水材料、吸墨材料、树脂按质量份计分别为10-40份、20-50份、5-10份。
4.根据权利要求1所述的一种适合机内高速生产的热升华转印纸,其特征在于,所述施胶层至少由施胶剂、填充材料配制而成,其中施胶剂、填充材料按质量份计分别为50-90份、10-30份。
5.根据权利要求4所述的一种适合机内高速生产的热升华转印纸,其特征在于,所述施胶剂含烷基烯酮二聚体、烯基琥珀酸酐、羧甲基纤维素、苯乙烯-马来酸酐共聚物、改性氧化淀粉中的一种或多种任意比例的组合物。
6.根据权利要求4所述的一种适合机内高速生产的热升华转印纸,其特征在于,所述填充材料含煅烧高岭土、硅酸铝、二氧化硅和沙丁白中的一种或多种任意比例的组合物。
7.根据权利要求1-6任一项所述的一种适合机内高速生产的热升华转印纸,其特征在于,所述施胶层通过表面施胶方式至原纸的内表层,所述涂料层以机内涂布方式加工至原纸表面的施胶层上。
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