CN116607347A - 一种抗紫外线pp合成纸及其制造方法 - Google Patents
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Abstract
本发明公开了一种抗紫外线PP合成纸及其制造方法,在PP合成纸一侧的表面先涂布一层中间层、再涂布一层涂布涂液,所述涂布涂液包括以下重量份数的原料:改性羧甲基纤维素钠10‑20份、二氧化硅5‑10份、水50‑70份、无水乙醇15‑20份、润湿剂0.5‑2份、消泡剂0.5‑2份、固色剂2‑5份、紫外线吸收剂0.5‑2份和聚丙烯酸乳液5‑10份。本发明在涂布涂液中采用改性羧甲基纤维素钠提高粘结强度,其价格低廉,降低了涂布涂液的成本;本发明在涂布涂液中加入改性的羧甲基纤维素钠,提高了涂层的附着力,很好的防止了涂层剥离、掉粉和产生裂纹的问题。
Description
技术领域
本发明属于合成纸技术领域,具体涉及一种抗紫外线PP合成纸及其制造方法。
背景技术
PP合成纸具有低碳环保、比重小、强度大、耐候性好、抗撕裂性佳、质地柔软、印刷性能优良及经久耐用等诸多优点。PP合成纸因兼具塑料和纸的特征,在高质量印刷、高端包装和特种用途等方面得到了广泛的应用。PP合成纸的基体是惰性的聚丙烯且其表面没有活性基团,使得PP合成纸的表面是惰性的。表面惰性的PP合成纸在进行喷绘打画时,其与印刷用油墨或吸墨涂层粘接强度较差,印刷效果不佳。
为解决直接在PP合成纸上打画所存在的晕墨、图像失真等问题,通常人们会在PP合成纸上涂布一层涂布涂液,制成PP复合纸。然而,在PP复合纸的制备过程中,如果直接在PP合成纸上涂布涂液层,PP合成纸和涂层之间的剥离力会较低而不能满足使用要求,这就大大限制了PP合成纸在该领域的应用。
发明内容
针对上述现有技术中存在的问题,本发明的目的是提供一种抗紫外线PP合成纸及其制造方法,以解决上述技术问题。
为实现上述目的,本发明通过以下技术方案来实现:
一种抗紫外线PP合成纸,在PP合成纸一侧的表面先涂布一层中间层、再涂布一层涂布涂液,所述涂布涂液包括以下重量份数的原料:
改性羧甲基纤维素钠10-20份、二氧化硅5-10份、水50-70份、无水乙醇15-20份、润湿剂0.5-2份、消泡剂0.5-2份、固色剂2-5份、紫外线吸收剂0.5-2份和聚丙烯酸乳液5-10份;
所述改性羧甲基纤维素钠具有如式(I)所示的结构式:
所述式(I)化合物通过以下方法制备:
S1:配制5-8wt%的羧甲基纤维素钠的水溶液;
S2:加入过硫酸铵和丙烯酸,氮气氛围下,70-80℃下反应2-4小时;
S3:向S2中加入丙酮,沉淀分离产物,制备得到式(I)的化合物。
式(I)化合物的反应方程式如下:
所述过硫酸铵的加入量为羧甲基纤维素钠摩尔量的0.02-0.04倍;丙烯酸的加入量为羧甲基纤维素质量的2.5-3.5倍。
所述紫外线吸收剂为2-苯基苯并咪唑-5-磺酸、2,5-二羟基-4-甲氧基二苯甲酮、2,4-二甲氧基-4-羟基二苯甲酮中的一种或多种的混合。
所述固色剂为聚三甲基烯丙基氯化铵、聚二甲基二烯丙基氯化铵中的一种或多种的混合。
所述消泡剂为聚氧丙烯氧化乙烯甘油醚、聚氧乙烯聚氧丙烯季戊四醇醚、磷酸三丁酯中的一种或多种的混合。
所述润湿剂为十二烷基磺酸钠、聚醚改性硅氧烷中的一种或多种的混合。
所述中间层为溶剂型聚氨酯胶。
一种抗紫外线PP合成纸的制造方法,包括以下步骤:
S1:将改性羧甲基纤维素钠10-20份、二氧化硅5-10份、水50-70份、无水乙醇15-20份、润湿剂0.5-2份、消泡剂0.5-2份、固色剂2-5份、紫外线吸收剂0.5-2份和聚丙烯酸乳液5-10份混合均匀,得到涂布涂液;
S2:用涂布机在PP合成纸的一侧表面涂布溶剂型聚氨酯胶中间层,涂布量为5-8g/m2,涂布后60℃烘干;
S3:用涂布机在PP合成纸中间层上涂布涂布涂液,涂布量为10-25g/m2,涂布后70℃烘干,得到抗紫外线PP合成纸。
本发明的有益效果:
(1)本发明在涂布涂液中采用改性羧甲基纤维素钠提高粘结强度,其价格低廉,降低了涂布涂液的成本。
(2)本发明制备的PP合成纸含有紫外线吸收剂,其喷墨打印形成的图像长时间在户外暴露后可以保持颜色不变。
(3)本发明在涂布涂液中加入改性的羧甲基纤维素钠,提高了涂层的粘结强度,很好的防止了涂层剥离、掉粉和产生裂纹的问题。
具体实施方式
下面结合实施例对本发明作进一步说明,但本发明不局限于这些实施例。
实施例1
改性羧甲基纤维素钠的制备:
将263.16g羧甲基纤维素钠加入5000g水中,配制5wt%的羧甲基纤维素钠的水溶液;然后加入5.0g过硫酸铵和657.89g丙烯酸,搅拌混均;氮气氛围下,70℃下反应4小时,然后加入2000g丙酮,沉淀分离产物,得到改性羧甲基纤维素钠A,平均分子量约为4315。
实施例2
改性羧甲基纤维素钠的制备:
将319.15g羧甲基纤维素钠加入5000g水中,配制6wt%的羧甲基纤维素钠的水溶液;然后加入10.0g过硫酸铵和957.45g丙烯酸,搅拌混均;氮气氛围下,80℃下反应3小时,然后加入2000g丙酮,沉淀分离产物,得到改性羧甲基纤维素钠B,平均分子量约为4672。
实施例3
改性羧甲基纤维素钠的制备:
将434.78g羧甲基纤维素钠加入5000g水中,配制8wt%的羧甲基纤维素钠的水溶液;然后加入16.2g过硫酸铵和1521.74g丙烯酸,搅拌混均;氮气氛围下,70℃下反应2小时,然后加入2500g丙酮,沉淀分离产物,得到改性羧甲基纤维素钠C,平均分子量约为4852。
实施例4
一种抗紫外线PP合成纸的制造:
S1:将10kg改性羧甲基纤维素A、5kg二氧化硅、50kg水、15kg无水乙醇、0.5kg润湿剂(十二烷基磺酸钠)、0.5kg消泡剂(聚氧丙烯氧化乙烯甘油醚)、2kg固色剂(聚三甲基烯丙基氯化铵)、0.5kg紫外线吸收剂(2-苯基苯并咪唑-5-磺酸)和5kg聚丙烯酸乳液混合均匀,得到涂布涂液;
S2:用涂布机在PP合成纸的一侧表面涂布溶剂型聚氨酯胶中间层,涂布量为5g/m2,涂布后60℃烘干;
S3:用涂布机在PP合成纸中间层上涂布涂布涂液,涂布量为10g/m2,涂布后70℃烘干,得到抗紫外线PP合成纸。
实施例5
一种抗紫外线PP合成纸的制造:
S1:将15kg改性羧甲基纤维素钠B、8kg二氧化硅、60kg水、18kg无水乙醇、1kg润湿剂(聚醚改性硅氧烷)、1kg消泡剂(聚氧乙烯聚氧丙烯季戊四醇醚)、3kg固色剂(聚二甲基二烯丙基氯化铵)、1kg紫外线吸收剂(2,5-二羟基-4-甲氧基二苯甲酮)和8kg聚丙烯酸乳液混合均匀,得到涂布涂液;
S2:用涂布机在PP合成纸的一侧表面涂布溶剂型聚氨酯胶中间层,涂布量为6g/m2,涂布后60℃烘干;
S3:用涂布机在PP合成纸中间层上涂布涂布涂液,涂布量为20g/m2,涂布后70℃烘干,得到抗紫外线PP合成纸。
实施例6
一种抗紫外线PP合成纸的制造:
S1:将20kg改性羧甲基纤维素钠C、10kg二氧化硅、70kg水、15-20kg无水乙醇、2kg润湿剂(聚醚改性硅氧烷)、2kg消泡剂(磷酸三丁酯)、5kg固色剂(聚二甲基二烯丙基氯化铵)、2kg紫外线吸收剂(2,4-二甲氧基-4-羟基二苯甲酮)和10kg聚丙烯酸乳液混合均匀,得到涂布涂液;
S2:用涂布机在PP合成纸的一侧表面涂布溶剂型聚氨酯胶中间层,涂布量为8g/m2,涂布后60℃烘干;
S3:用涂布机在PP合成纸中间层上涂布涂布涂液,涂布量为25g/m2,涂布后70℃烘干,得到抗紫外线PP合成纸。
对比例1
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,不添加改性羧甲基纤维素钠B。
对比例2
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,将改性羧甲基纤维素钠B替换为3.75kg羧甲基纤维素钠和11.25kg丙烯酸。
对比例3
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,将改性羧甲基纤维素钠B替换为3.75kg羧甲基纤维素钠。
对比例4
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,将改性羧甲基纤维素钠B替换为15kg羧甲基纤维素钠。
对比例5
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,将改性羧甲基纤维素钠B替换为11.25kg丙烯酸。
对比例6
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,将改性羧甲基纤维素钠B替换为15kg丙烯酸。
对比例7
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,将改性羧甲基纤维素钠B替换为等重量的如式(II)所示的化合物:
对比例8
抗紫外线PP合成纸的制造方法与实施例5的制造方法基本相同,其不同之处是,将改性羧甲基纤维素钠B替换为等重量的如式(III)所示的化合物:
吸墨性能的测定:采用国家标准GB1728-79的测试方法。即在PP合成纸上喷上一定量的墨水,然后开始记时,当用手指轻触涂膜表面,若感到发粘,但无油墨粘在手上,可认为涂膜表面已干燥,即刻停止记时,所得的时间即为PP合成纸的吸墨时间。
PP合成纸清晰度的测定:PP合成纸的清晰度是通过墨滴喷射到PP合成纸上扩散后的直径与扩散前墨滴的直径的比值来表征的,该比值越小,清晰度越好。采用GB1216-85型外径千分尺测量喷射前、后墨滴的直径。
粘结强度测试:采用标准ASTM C 633-2001的方法测试粘结强度。
实施例和对比例的吸墨性能、PP合成纸清晰度和粘结强度测试结果如表1所示。
表1
以上所述,仅为本发明的优选实施例,并不用于限定本发明;但对于本领域的普通技术人员在不脱离本发明技术方案范围内,可利用以上所揭示的技术内容而作出的些许更动、修饰与演变的等同变化,均为本发明的等效实施例;同时,凡依据本发明的实质技术对以上实施例所作的任何等同变化的更动、修饰与演变等,均仍属于本发明的技术方案的保护范围之内。
Claims (9)
1.一种抗紫外线PP合成纸,其特征在于,在PP合成纸一侧的表面先涂布一层中间层、再涂布一层涂布涂液,所述涂布涂液包括以下重量份数的原料:
改性羧甲基纤维素钠10-20份、二氧化硅5-10份、水50-70份、无水乙醇15-20份、润湿剂0.5-2份、消泡剂0.5-2份、固色剂2-5份、紫外线吸收剂0.5-2份和聚丙烯酸乳液5-10份;
所述改性羧甲基纤维素钠具有如式(I)所示的结构式:
2.根据权利要求1所述的一种抗紫外线PP合成纸,其特征在于,所述式(I)化合物通过以下方法制备:
S1:配制5-8wt%的羧甲基纤维素钠的水溶液;
S2:加入过硫酸铵和丙烯酸,氮气氛围下,70-80℃下反应2-4小时;
S3:向S2中加入丙酮,沉淀分离产物,制备得到式(I)的化合物。
3.根据权利要求1所述的一种抗紫外线PP合成纸,其特征在于,所述过硫酸铵的加入量为羧甲基纤维素钠摩尔量的0.02-0.04倍;丙烯酸的加入量为羧甲基纤维素质量的2.5-3.5倍。
4.根据权利要求1所述的一种抗紫外线PP合成纸,其特征在于,所述紫外线吸收剂为2-苯基苯并咪唑-5-磺酸、2,5-二羟基-4-甲氧基二苯甲酮、2,4-二甲氧基-4-羟基二苯甲酮中的一种或多种的混合。
5.根据权利要求1所述的一种抗紫外线PP合成纸,其特征在于,所述固色剂为聚三甲基烯丙基氯化铵、聚二甲基二烯丙基氯化铵中的一种或多种的混合。
6.根据权利要求1所述的一种抗紫外线PP合成纸,其特征在于,所述消泡剂为聚氧丙烯氧化乙烯甘油醚、聚氧乙烯聚氧丙烯季戊四醇醚、磷酸三丁酯中的一种或多种的混合。
7.根据权利要求1所述的一种抗紫外线PP合成纸,其特征在于,所述润湿剂为十二烷基磺酸钠、聚醚改性硅氧烷中的一种或多种的混合。
8.根据权利要求1所述的一种抗紫外线PP合成纸,其特征在于,所述中间层为溶剂型聚氨酯胶。
9.一种抗紫外线PP合成纸的制造方法,其特征在于,包括以下步骤:
S1:将改性羧甲基纤维素钠10-20份、二氧化硅5-10份、水50-70份、无水乙醇15-20份、润湿剂0.5-2份、消泡剂0.5-2份、固色剂2-5份、紫外线吸收剂0.5-2份和聚丙烯酸乳液5-10份混合均匀,得到涂布涂液;
S2:用涂布机在PP合成纸的一侧表面涂布溶剂型聚氨酯胶中间层,涂布量为5-8g/m2,涂布后60℃烘干;
S3:用涂布机在PP合成纸中间层上涂布涂布涂液,涂布量为10-25g/m2,涂布后70℃烘干,得到抗紫外线PP合成纸。
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