CN104448631A - 高耐候聚氯乙烯发泡广告板及其制备方法 - Google Patents
高耐候聚氯乙烯发泡广告板及其制备方法 Download PDFInfo
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
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- 238000001816 cooling Methods 0.000 claims description 9
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- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical group C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- QADQONZVQSTLCY-UHFFFAOYSA-N C(=CC1=CC=CC=C1)C=CC#N.C(C=C)(=O)OCCCC.C(C(=C)C)(=O)OC Chemical group C(=CC1=CC=CC=C1)C=CC#N.C(C=C)(=O)OCCCC.C(C(=C)C)(=O)OC QADQONZVQSTLCY-UHFFFAOYSA-N 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 2
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical group [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 claims description 2
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical group CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
本发明涉及一种广告板，具体涉及一种高耐候聚氯乙烯发泡广告板及其制备方法。所述的发泡广告板由聚氯乙烯树脂、热稳定剂、光稳定剂、加工改性剂、填充剂、润滑剂、复合发泡剂、亚光粉、引发剂、交联剂、泡孔稳定剂、低温增韧剂、增白剂和颜料制成。所述的聚氯乙烯发泡广告板具有高耐候、亚光面的特点，能够提高对油墨的附着力，消除打印重影，增加立体感，改善广告效果；本发明的制备方法工艺简单、易于实现。
Description
技术领域
本发明涉及一种广告板，具体涉及一种高耐候聚氯乙烯发泡广告板及其制备方法。
背景技术
近年来，出于保持生态平衡的目的，各国制定了诸多优惠政策，积极推进发展以塑代木。其中，聚氯乙烯发泡材料，由于具有像木材一样可锯、可刨、可胶黏、可钻孔等加工性能，并且具有耐腐蚀、不霉变、防虫蛀、隔音、隔热、防潮等特点，得到了很好的发展，广泛应用于店面招牌、展台、广告板等。
现有技术中的聚氯乙烯普通发泡广告板，由于耐候性较低，常常时间稍长，就发生褪色、变形、脆裂等问题，尤其户外广告板更突出。在户外受到风吹日晒雨淋后，时间一长容易发生老化降解，如颜色发生明显变化、褪色、表面龟裂，产品力学性能明显下降，严重影响产品的使用性能，使用年限或寿命大幅缩短。同时，因为普通板表面光滑，使用过程中容易发生对油墨附着力差，易出现重影现象，且立体感差，影响广告效果。特别是在电脑直接打印的应用领域，表现的尤为严重。严重影响聚氯乙烯发泡广告板在高档广告板领域的推广使用。
发明内容
针对现有技术的不足，本发明的目的是提供一种高耐候聚氯乙烯发泡广告板，具有高耐候、亚光面的特点，能够延长使用寿命，减少褪色、变形及脆裂；同时提高对油墨的附着力，消除打印重影，增加立体感，改善广告效果；本发明同时提供其制备方法。
本发明所述的高耐候聚氯乙烯发泡广告板，由以下重量份数的原料制成：
其中，
聚氯乙烯树脂为疏松型聚合度为700-800的聚氯乙烯树脂。优选聚氯乙烯树脂SG-8。
热稳定剂为稀土复合稳定剂；稀土复合稳定剂优选XT-1。光稳定剂为金红石型钛白粉或紫外线吸收剂中的一种或两种。金红石型钛白粉优选TR-618金红石型钛白粉或杜邦R-902+。紫外线吸收剂优选紫外线吸收剂UV-531。
复合发泡剂由黄发泡剂和白发泡剂组成，黄发泡剂和白发泡剂的质量比为1:0.5-1:0.05。
黄发泡剂为偶氮二甲酰胺；白发泡剂为碳酸氢钠或碳酸氢铵。
低温增韧剂为ACR抗冲击改性剂或增韧剂EVA。其中，ACR抗冲击改性剂优选为抗冲ACR LS-61；增韧剂EVA中VA的摩尔含量为28％，优选EVA7470M。亚光粉为微球发泡剂(深圳市英荃化工有限公司)。
填充剂为活性轻质碳酸钙，粒度为300-1000目；润滑剂为硬脂酸、聚乙烯蜡(青岛赛诺化工有限公司)或氧化聚乙烯；增白剂为二苯乙烯联苯类荧光增白剂；颜料为群青或炭黑，炭黑优选为炭黑N220。
引发剂为过氧化苯甲酰；交联剂为双叔丁基过氧化二异丙基苯。
加工改性剂为甲基丙烯酸甲酯-醋酸乙烯酯共聚物，特性粘度为3.0-6.0；泡孔稳定剂为丙烯酸酯丁酯-苯乙烯-丙烯腈-甲基丙烯酸甲酯四元接枝共聚物，特性粘度为11-15。泡孔稳定剂优选为PVC发泡调节剂LS-530。加入泡孔稳定剂，主要用来提高发泡物料的熔体强度，确保物料在发泡时泡孔壁不破裂，不发生并泡现象。从而使发泡制品密度低、强度好。
所述的高耐候聚氯乙烯发泡广告板的制备方法，首先，将配方量的物料在105-125℃下混合均匀，冷却后采用双螺杆挤出机加热塑化，然后经模具挤出成型，冷却定型后进行切割，即得高耐候聚氯乙烯发泡广告板。
所述的制备方法优选为：首先，将配方量的物料经高速捏合机在120℃下混合均匀，然后放入冷搅机中冷至55℃以下，通过真空上料***输送到锥形双螺杆挤出机料斗中，经挤出机加热塑化后，经T型机头模具挤出成型。成型后物料先经预冷辊预冷，再经三辊机上光，冷却定型并消除张力后修边，覆膜，展平后切割，即得高耐候聚氯乙烯发泡广告板。其中，
双螺杆挤出机的螺杆转速15-20r/min，机筒温度为155-175℃，螺杆油温80-100℃，模具温度为165-175℃，模唇温度为170-185℃。
与现有技术相比，本发明具有以下有益效果：
(1)本发明制备得到的高耐候聚氯乙烯发泡广告板具有高耐候、亚光面的特点，能够延长使用寿命，减少褪色、变形及脆裂；同时提高对油墨的附着力，消除打印重影，增加立体感，改善广告效果。
(2)本发明同时提供其制备方法，工艺简单，易操作。
具体实施方式
下面结合实施例对本发明做进一步说明。
实施例1
本实施例所述的高耐候聚氯乙烯发泡广告板，以重量份数计，原料组成如下：
其中，加工改性剂为甲基丙烯酸甲酯-醋酸乙烯酯共聚物，特性粘度为4.5。
制备方法：
首先，将配方量的物料经高速捏合机在120℃下混合均匀，然后放入冷搅机中冷至55℃，通过真空上料***输送到锥形双螺杆挤出机料斗中，经挤出机加热塑化后，经T型机头模具挤出成型。先经预冷辊预冷，再经三辊机上光、冷却定型并消除张力后修边，覆膜，展平后切割，即得4mm厚高耐候聚氯乙烯发泡广告板。其中，双螺杆挤出机的螺杆转速18r/min；分为四个控温区，第一控温区温度为：160℃，第二控温区温度为：162℃，第三控温区温度为164℃，第四控温区温度为：166℃；螺杆油温90℃，模具温度为170℃，模唇温度为175℃。
对实施例1制备得到的高耐候聚氯乙烯发泡广告板进行性能测试，测试结果：板材密度为0.453g/cm3，邵氏硬度(D)22，光泽度(GU)16，耐老化时间800小时。
耐老化时间测试：QUV(耐候性老化箱)老化时间。
普通市购广告板的耐老化时间为300-500h。
实施例2
本实施例所述的高耐候聚氯乙烯发泡广告板，以重量份数计，原料组成如下：
其中，加工改性剂为甲基丙烯酸甲酯-醋酸乙烯酯共聚物，特性粘度为3。
制备方法：
首先，将配方量的物料经高速捏合机在120℃下混合均匀，然后放入冷搅机中冷至50℃，通过真空上料***输送到锥形双螺杆挤出机料斗中，经挤出机加热塑化后，经T型机头模具挤出成型。先经预冷辊预冷，再经三辊机上光，冷却定型并消除张力后修边，覆膜，展平后切割，即得高耐候聚氯乙烯发泡广告板。其中，双螺杆挤出机的螺杆转速20r/min，分为四个控温区，第一控温区温度为：168℃，第二控温区温度为：171℃，第三控温区温度为173℃，第四控温区温度为：175℃；螺杆油温100℃，模具温度为173℃，模唇温度为185℃。
对实施例2制备得到的高耐候聚氯乙烯发泡广告板进行性能测试，测试结果：板材密度为0.481g/cm3，邵氏硬度(D)24，光泽度(GU)20，耐老化时间1500小时。
耐老化时间测试：QUV(耐候性老化箱)老化时间。
普通市购广告板的耐老化时间为300-500h。
实施例3
本实施例所述的高耐候聚氯乙烯发泡广告板，以重量份数计，原料组成如下：
其中，加工改性剂为甲基丙烯酸甲酯-醋酸乙烯酯共聚物，特性粘度为6。
制备方法：
首先，将配方量的物料经高速捏合机在120℃下混合均匀，然后放入冷搅机中冷至45℃，通过真空上料***输送到锥形双螺杆挤出机料斗中，经挤出机加热塑化后，经T型机头模具挤出成型。先经预冷辊预冷，再经三辊机上光，冷却定型并消除张力后修边，覆膜，展平后切割，即得高耐候聚氯乙烯发泡广告板。其中，双螺杆挤出机的螺杆转速15r/min，分为四个控温区，第一控温区温度为：155℃，第二控温区温度为：157℃，第三控温区温度为159℃，第四控温区温度为：161℃；螺杆油温80℃，模具温度为167℃，模唇温度为170℃。
对实施例3制备得到的高耐候聚氯乙烯发泡广告板进行性能测试，测试结果：板材密度为0.530g/cm3，邵氏硬度(D)28，光泽度(GU)6，耐老化时间1200小时。
耐老化时间测试：QUV(耐候性老化箱)老化时间。
普通市购广告板的耐老化时间为300-500h。
实施例4
本实施例所述的高耐候聚氯乙烯发泡广告板，以重量份数计，原料组成如下：
其中，加工改性剂为甲基丙烯酸甲酯-醋酸乙烯酯共聚物，特性粘度为4.5。
制备方法：
首先，将配方量的物料经高速捏合机在120℃下混合均匀，然后放入冷搅机中冷至45℃，通过真空上料***输送到锥形双螺杆挤出机料斗中，经挤出机加热塑化后，经T型机头模具挤出成型。先经预冷辊预冷，再经三辊机上光，冷却定型并消除张力后修边，覆膜，展平后切割，即得高耐候聚氯乙烯发泡广告板。其中，双螺杆挤出机的螺杆转速18r/min，分为四个控温区，第一控温区温度为：156℃，第二控温区温度为：159℃，第三控温区温度为161℃，第四控温区温度为：164℃；螺杆油温88℃，模具温度为170℃，模唇温度为170℃。
对实施例4制备得到的高耐候聚氯乙烯发泡广告板进行性能测试，测试结果：板材密度为0.60g/cm3，邵氏硬度(D)30，光泽度(GU)10，耐老化时间1450小时。
耐老化时间测试：QUV(耐候性老化箱)老化时间。
普通市购广告板的耐老化时间为300-500h。
Claims (10)
1.一种高耐候聚氯乙烯发泡广告板，其特征在于：由以下重量份数的原料制成：
2.根据权利要求1所述的高耐候聚氯乙烯发泡广告板，其特征在于：聚氯乙烯树脂为疏松型聚合度为700-800的聚氯乙烯树脂。
3.根据权利要求1所述的高耐候聚氯乙烯发泡广告板，其特征在于：热稳定剂为稀土复合稳定剂；光稳定剂为金红石型钛白粉或紫外线吸收剂中的一种或两种。
4.根据权利要求1所述的高耐候聚氯乙烯发泡广告板，其特征在于：复合发泡剂由黄发泡剂和白发泡剂组成，黄发泡剂和白发泡剂的质量比为1∶0.5-1∶0.05。
5.根据权利要求4所述的高耐候聚氯乙烯发泡广告板，其特征在于：黄发泡剂为偶氮二甲酰胺；白发泡剂为碳酸氢钠或碳酸氢铵。
6.根据权利要求1所述的高耐候聚氯乙烯发泡广告板，其特征在于：低温增韧剂为A C R抗冲击改性剂或增韧剂E V A；亚光粉为微球发泡剂。
7.根据权利要求1所述的高耐候聚氯乙烯发泡广告板，其特征在于：填充剂为活性轻质碳酸钙，粒度为300-1000目；润滑剂为硬脂酸、聚乙烯蜡或氧化聚乙烯；增白剂为二苯乙烯联苯类荧光增白剂；颜料为群青或炭黑。
8.根据权利要求1所述的高耐候聚氯乙烯发泡广告板，其特征在于：引发剂为过氧化苯甲酰；交联剂为双叔丁基过氧化二异丙基苯。
9.根据权利要求1所述的高耐候聚氯乙烯发泡广告板，其特征在于：加工改性剂为甲基丙烯酸甲酯-醋酸乙烯酯共聚物，特性粘度为3.0-6.0；泡孔稳定剂为丙烯酸酯丁酯-苯乙烯-丙烯腈-甲基丙烯酸甲酯四元接枝共聚物，特性粘度为11-15。
10.一种权利要求1-9任一所述的高耐候聚氯乙烯发泡广告板的制备方法，其特征在于：首先，将配方量的物料在105-125℃下混合均匀，冷却后采用双螺杆挤出机加热塑化，然后经模具挤出成型，冷却定型后进行切割，即得高耐候聚氯乙烯发泡广告板。
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