CN114953672B - 一种墙板及其制备工艺 - Google Patents

一种墙板及其制备工艺 Download PDF

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CN114953672B
CN114953672B CN202210599424.9A CN202210599424A CN114953672B CN 114953672 B CN114953672 B CN 114953672B CN 202210599424 A CN202210599424 A CN 202210599424A CN 114953672 B CN114953672 B CN 114953672B
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parts
layer
wallboard
calcium
foaming
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CN114953672A (zh
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张小玲
肖志远
李彦辉
王帅
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Changzhou Bemate Home Technology Co Ltd
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Changzhou Bemate Home Technology Co Ltd
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Abstract

本发明涉及一种墙板及其制备工艺，依次包括面皮层、发泡层、底皮层；所述发泡层，以重量份数计，包括以下原料：PVC树脂70‑90份、轻质碳酸钙90‑120份、钙锌稳定剂8‑10份、发泡调节剂8‑15份、黄发泡剂0.2‑0.8份，所述轻质碳酸钙为1200‑1300目；所述钙锌稳定剂，包括以下原料：钙盐主稳定剂、锌盐主稳定剂、碳纳米管、硅烷偶联剂、4,4‑二苯基‑2,2‑二联吡啶、二甲基亚砜。本发明的墙板包括发泡层，通过发泡工艺使其结构内部形成无数均匀细腻的气泡，成型后的发泡层具有均匀的泡孔，大大降低了墙板的密度，降低了安装难度，提高了室内静谧性。

Description

一种墙板及其制备工艺
技术领域
本发明涉及墙板领域，特别是涉及一种墙板及其制备工艺。
背景技术
随着建筑装修行业的发展以及技术的进步，室内装修所使用的墙板不再局限于传统的瓷砖墙板，而是出现了利用材料复合制成的复合墙板。
当前各类墙板中，聚氯乙烯(PVC)塑料墙板因其卓越的防水、防火、防滑、环保等性能，深受消费者的喜爱。其中石塑墙板(SPC)更是成为PVC塑料墙板的新宠，其作为新型建筑材料得到了广泛应用。现有石塑墙板结构均为单层，单层结构更容易随着四季气温变化而发生翘曲变形。另外，石塑墙板的密度较高，其成品密度大多在2.0g/cm3以上，这就导致了墙板的安装难度增大，且隔音效果较差。
发明内容
针对现有技术的不足，本发明提供了一种墙板及其制备工艺，其中墙板包括发泡层，通过发泡工艺使其结构内部形成无数均匀细腻的气泡，成型后的发泡层具有均匀的泡孔，大大降低了墙板的密度，降低了安装难度，提高了室内静谧性。
为解决上述技术问题，本发明提供了一种墙板，依次包括面皮层、发泡层、底皮层；所述发泡层，以重量份数计，包括以下原料：PVC树脂70-90份、轻质碳酸钙90-120份、钙锌稳定剂8-10份、发泡调节剂8-15份、黄发泡剂0.2-0.8份，所述轻质碳酸钙为1200-1300目；所述钙锌稳定剂，包括以下原料：钙盐主稳定剂、锌盐主稳定剂、碳纳米管、硅烷偶联剂、4,4-二苯基-2,2-二联吡啶、二甲基亚砜。
进一步地，所述钙锌稳定剂的原料，以质量分数计，钙盐主稳定剂10-30份、锌盐主稳定剂20-60份、碳纳米管5-7份、硅烷偶联剂5-10份、4,4-二苯基-2,2-二联吡啶2-4份、二甲基亚砜20-30份。
进一步地，所述钙锌稳定剂的制备过程，至少包括以下步骤：
S1、取经过处理的碳纳米管、硅烷偶联剂溶液混合，在40-50℃、1200-1400r/min的转速下处理80-100min，冷却、抽滤、干燥后得到改性后的碳纳米管；
S2、取钙盐主稳定剂、锌盐主稳定剂、改性后的碳纳米管、4,4-二苯基-2,2-二联吡啶、二甲基亚砜，在60-80℃、1200-1500r/min的条件下搅拌20-40min，冷却后得到钙锌稳定剂。
进一步地，所述钙盐主稳定剂为硬脂酸钙、棕榈酸钙、月桂酸钙中的任意一种；所述锌盐主稳定剂为硬脂酸锌、棕榈酸锌、月桂酸锌中的任意一种。
进一步地，所述钙盐主稳定剂与锌盐主稳定剂的质量比为1:2-4。
进一步地，所述硅烷偶联剂为3-氨基丙基三甲氧基硅烷、γ-氨丙基三乙氧基硅烷、3-(2,3-环氧丙氧)丙基三甲氧基硅烷、N-β-(氨乙基)-γ-氨丙基三甲氧基硅烷、N-(β-氨乙基)-γ-氨丙基三乙氧基硅烷中的任意一种。
进一步地，所述发泡调节剂为高分子丙烯酸树脂。
进一步地，所述面皮层与底皮层的原料包括，以重量份数计，PVC树脂75-90份、重质碳酸钙150-180份、钙盐稳定剂8-10份、成型剂CPE 2.5-3份、增韧剂ACR 3-6份、内润滑剂G60 1-2份、外润滑剂PE蜡1-2份、炭黑0.5份。
进一步地，所述面皮层上依次设置有彩膜层、PET膜层、UV涂层。
本发明还提供了一种墙板的制备工艺：
A、取面皮层与底皮层的原料加入高速搅拌机，升温至100-120℃时出料，得到混合料a；
B、当混合料a降温后，将混合料a送入1号双螺旋挤出机，螺筒温度为160℃-200℃；之后混合料a经螺杆进入模具，模具内部设置有分配器，将混合料a分成面皮层物料与底皮层物料；
C、取发泡层的原料加入高速搅拌机，升温至100-120℃时出料，得到混合料b；
D、当混合料b降温后，将混合料b送入2号双螺杆挤出机，螺筒温度为160℃-180℃；之后混合料b经螺杆进入模具，形成发泡层；
E、步骤B中1号挤出机的挤出物料进入模具流道分配器与步骤D中2号挤出机挤出的物料在模头处汇合，再经模头的模口共挤挤出，由此物料出模口形成ABA三层结构的基材，其中中间层为发泡层，上下两层分别为面皮层和底皮层；
F、拉制步骤E得到的基材，经过SPC五辊压机进一步的调整厚度，之后在面皮层表面依次设置彩膜层、PET层、UV涂层，得到墙板。
本发明的技术方案中，具有以下有效效果：
1、本发明通过ABA共挤发泡工艺制做墙板，墙板中间通过发泡，大大降低了墙板的密度，市面上常规SPC墙板密度2.05g/cm2，而本发明制备的墙板密度为1.4g/cm2，因此在密度上降低了30％，降低了墙板的施工难度。
2、ABA共挤发泡基材上下两层是常规SPC基材，中间采用了化学发泡，形成了无数细腻的泡孔，因此在隔音性方面比市面上SPC墙板隔音性更好，提高了室内静谧性。
3、基材表面的花纹采用的数码打印技术，因此图案颜色可以千变万化，更改方便快捷，可以根据客户需求快速满足客户产品。
4、墙板表面进行了UV油漆处理，UV油漆无毒无害，不仅提高了耐磨耐刮、防水防潮，还可以保障数码打印图案长时间不受外界空气的干扰，长期保持原有的颜色。
5、市面上墙板安装大多需要背面打钢钉，拼接处需要扣件处理，既复杂又影响美观。本申请中的墙板两侧进行开槽处理，其槽口为平扣或者U扣，一推即可拼接完毕，因此，方便了墙板的拼接，减小了拼接留下来的缝隙。
具体实施方式
下面将结合本发明实施例，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
下述实施例中的实验方法，如无特殊说明，均为常规方法。下述实施例中所用的试验材料和试剂等，如无特殊说明，均可从商业途径获得。以下实施例中的定量试验，均设置三次重复实验，数据为三次重复实验的平均值或平均值±标准差。
另外，全文中的“和/或”包括三个方案，以A和/或B为例，包括A技术方案、B技术方案，以及A和B同时满足的技术方案；另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提供了一种墙板，依次包括面皮层、发泡层、底皮层；所述发泡层，以重量份数计，包括以下原料：PVC树脂70-90份、轻质碳酸钙90-120份、钙锌稳定剂8-10份、发泡调节剂8-15份、黄发泡剂0.2-0.8份，所述轻质碳酸钙为1200-1300目；所述钙锌稳定剂，包括以下原料：钙盐主稳定剂、锌盐主稳定剂、碳纳米管、硅烷偶联剂、4,4-二苯基-2,2-二联吡啶、二甲基亚砜。
优选的，所述轻质碳酸钙为1200目。
优选的，所述PVC树脂为SG-8型
本发明的技术方案中，轻质碳酸钙起填充作用，可以有效地提高发泡层的硬度以及稳定度。其中，通过调节轻质碳酸钙的粒径，使轻质碳酸钙可以作为成核剂，吸附发泡气体形成泡孔。当轻质碳酸钙的粒径过大时，易使得发泡气体形成较大的泡孔，降低泡孔在发泡层的细密度；轻质碳酸钙粒径过小时，其自身易发生团聚，导致轻质碳酸钙在发泡层中的分散性较差，影响发泡层泡孔的均匀性，因此通过调节轻质碳酸钙的粒径，提高泡孔分布在发泡层内部的均匀性，进而降低墙板的密度，提高静音效果。
在一些实施例中，所述钙锌稳定剂的原料，以质量分数计，钙盐主稳定剂10-30份、锌盐主稳定剂20-60份、碳纳米管5-7份、硅烷偶联剂5-10份、4,4-二苯基-2,2-二联吡啶2-4份、二甲基亚砜20-30份。
本发明的技术方案中，钙锌稳定剂是聚氯乙烯生产过程中使用的稳定剂，用于提升聚氯乙烯的耐热性和耐候性。当面皮层内部发泡后，改性后的碳纳米管能够起到骨架支撑的作用，防止气泡破裂，同时，由于改性碳纳米管在面皮层中的分散性好，从而使得发泡更加均匀。此外，4,4-二苯基-2,2-二联吡啶的加入，可以碳纳米管与PVC更好地相容，以提高发泡体的强度，防止气泡合并或破裂。
在一些实施例中，所述钙锌稳定剂的制备过程，至少包括以下步骤：
S1、取经过处理的碳纳米管、硅烷偶联剂溶液混合，在40-50℃、1200-1400r/min的转速下处理80-100min，冷却、抽滤、干燥后得到改性后的碳纳米管；
S2、取钙盐主稳定剂、锌盐主稳定剂、改性后的碳纳米管、4,4-二苯基-2,2-二联吡啶、二甲基亚砜，在60-80℃、1200-1500r/min的条件下搅拌20-40min，冷却后得到钙锌稳定剂。
在一些实施例中，所述碳纳米管的处理步骤为：取碳纳米管，将碳纳米管与浓度为12％的硝酸溶液浸泡处理3-4h，浸泡过程中使用超声波震荡处理，然后使用去离子水对碳纳米管进行清洗，再使用体积分数70％的乙醇溶液浸洗3次，烘干。
在一些实施例中，所述钙盐主稳定剂为硬脂酸钙、棕榈酸钙、月桂酸钙中的任意一种；所述锌盐主稳定剂为硬脂酸锌、棕榈酸锌、月桂酸锌中的任意一种。
优选的，所述钙盐主稳定剂为硬脂酸钙。
优选的，所述锌盐主稳定剂为硬脂酸锌。
在一些实施例中，所述钙盐主稳定剂与锌盐主稳定剂的质量比为1:2-4。
优选的，所述钙盐主稳定剂与锌盐主稳定剂的质量比为1:4。
在一些实施例中，所述硅烷偶联剂为3-氨基丙基三甲氧基硅烷、γ-氨丙基三乙氧基硅烷、3-(2,3-环氧丙氧)丙基三甲氧基硅烷、N-β-(氨乙基)-γ-氨丙基三甲氧基硅烷、N-(β-氨乙基)-γ-氨丙基三乙氧基硅烷中的任意一种。
在一些实施例中，所述黄发泡剂为偶氮二甲酰胺。
本发明的技术方案中，黄发泡剂为偶氮二甲酸胺，偶氮二甲酸胺可以在物料熔融的过程中分解生成氮气。
在一些实施例中，所述发泡调节剂为高分子丙烯酸树脂。
本发明的技术方案中，发泡调节剂与PVC相容性较好，促进了PVC的塑化、熔融，提高发泡体的强度及延展性，在发泡过程中防止气泡合并或破裂，使发泡过程稳定、可控，从而得到泡孔结构均匀、细小，密度较低的发泡层。
在一些实施例中，发泡层的原料还包括内润滑剂G60 1-2份、外润滑剂PE蜡1-2份。
本发明的技术方案中，内润滑剂G60主要作用是润滑复合材料的接触面，使其具有较好的流动性，防止工件被划伤。外润滑剂PE蜡作用是提高物料与设备料筒以及模具流动性，减小物料与设备摩擦，提高物料塑化作用。
在一些实施例中，所述面皮层与底皮层的原料包括，以重量份数计，PVC树脂75-90份、重质碳酸钙150-180份、钙盐稳定剂8-10份、成型剂CPE 2.5-3份、增韧剂ACR 3-6份、内润滑剂G60 1-2份、外润滑剂PE蜡1-2份、炭黑0.5份。
在一些实施例中，所述成型剂CPE为氯化聚乙烯，所述氯化聚乙烯中氯含量为34-39％。
本发明的技术方案中，成型剂可以提高发泡层的韧性及抗冲击性能。
在一些实施例中，所述面皮层上依次设置有彩膜层、PET膜层、UV涂层。
本发明的技术方案中，墙板的结构层依次为UV涂层、PET膜层、彩膜层、面皮层、发泡层、底皮层。相比于传统的单层石塑墙板，多层结构的墙板不容易随着四季气温变化而发生翘曲变形，使用过程中不容易出现鼓包，具有良好的机械稳定性。
本发明还提供了一种所述墙板的制备工艺：
A、取面皮层与底皮层的原料加入高速搅拌机，升温至100-120℃时出料，得到混合料a；
B、当混合料a降温后，将混合料a送入1号双螺旋挤出机，螺筒温度为160℃-200℃；之后混合料a经螺杆进入模具，模具内部设置有分配器，将混合料a分成面皮层物料与底皮层物料；
C、取发泡层的原料加入高速搅拌机，升温至100-120℃时出料，得到混合料b；
D、当混合料b降温后，将混合料b送入2号双螺杆挤出机，螺筒温度为160℃-180℃；之后混合料b经螺杆进入模具，形成发泡层；
E、步骤B中1号挤出机的挤出物料进入模具流道分配器与步骤D中2号挤出机挤出的物料在模头处汇合，再经模头的模口共挤挤出，由此物料出模口形成ABA三层结构的基材，其中中间层为发泡层，上下两层分别为面皮层和底皮层；
F、拉制步骤E得到的基材，经过SPC五辊压机进一步的调整厚度，之后在面皮层表面依次设置彩膜层、PET层、UV涂层，得到墙板。
在一些实施例中，将所述混合料a降温至75-80℃。
在一些实施例中，将所述混合料b降温至75-80℃。
在一些实施例中，所述模具温度为200℃-220℃，模口冷却温度为100℃-140℃。
在一些实施例中，SPC五辊压机进一步的调整厚度的步骤为，首先进入1、2号镜面辊，调整基材厚度，然后在3、4号辊进行辊压覆白膜，经过尺寸控制做出所需基材；之后在面皮层上通过数码打印机在表面打印出彩膜层，再将PET膜层粘接于彩膜层上，最后在PET膜层上涂覆UV涂层，切割，得到墙板。
在一些实施例中，在墙板两侧开槽处理，扣型为平扣。提高了安装便捷性，降低了普通墙板安装的缝隙，提高了墙板的美观度。
本发明的技术方案中，墙板包括发泡层，通过发泡工艺使其结构内部形成无数均匀细腻的气泡，成型后的发泡层形成均匀的泡孔，大大降低了墙板的密度，降低了安装难度，同时隔音效果良好。发泡层的上下两层设置有面皮层和底皮层，使墙板的稳定性更强。
实施例一
A、取重质碳酸钙和PVC树脂加入高速搅拌机，混合搅拌后，再加入钙盐稳定剂、成型剂CPE、增韧剂ACR、内润滑剂G60、外润滑剂PE蜡、炭黑，升温至100℃时出料，得到混合料a；
B、将混合料a冷却至75℃后，将混合料a送入1号双螺旋挤出机，螺筒温度为180℃；之后混合料a经螺杆进入模具，模具内部设置有分配器，将混合料a分成面皮层物料与底皮层物料；
C、取轻质碳酸钙和PVC树脂一起加入高速搅拌机，混合搅拌，再加入钙锌稳定剂、发泡调节剂、黄发泡剂、内润滑剂G60、外润滑剂PE蜡，升温至100℃时出料，得到混合料b；
D、将混合料b冷却至75℃后，将混合料b送入2号双螺杆挤出机，螺筒温度为170℃；之后混合料b经螺杆进入模具，形成发泡层；
E、步骤B中1号挤出机的挤出物料进入模具流道分配器与步骤D中2号挤出机挤出的物料在模头处汇合，再经模头的模口共挤挤出，由此物料出模口形成ABA三层结构的基材，其中中间层为发泡层，上下两层分别为面皮层和底皮层；所述模具温度为200℃，模口冷却温度为100℃；
F、拉制步骤E得到的基材，经过SPC五辊压机进一步的调整厚度，首先进入1、2号镜面辊，调整基材厚度，然后在3、4号辊进行辊压覆白膜，经过尺寸控制做出所需基材；之后在面皮层上通过数码打印机在表面打印出彩膜层，再将PET膜层粘接于彩膜层上，最后在PET膜层上涂覆UV涂层，切割，得到墙板；在墙板两侧开槽处理，扣型为平扣。
实施例二至四的墙板制备工艺步骤与实施例一相同，实施例一至实施例四的原料用量以及反应条件如表1、表2所示。
表1各实施例中各原料用量(以重量份数计)
Figure BDA0003669421290000081
表2各实施例中各步骤反应条件
Figure BDA0003669421290000091
其中，实施例一至实施例四中钙锌稳定剂的制备方法：
S1、取碳纳米管，将碳纳米管与浓度为12％的硝酸溶液浸泡处理3h，浸泡过程中使用超声波震荡处理，然后使用去离子水对碳纳米管进行清洗，再使用体积分数70％的乙醇溶液浸洗3次，烘干。取经过处理的碳纳米管、3-氨基丙基三甲氧基硅烷溶液混合，在40℃、1200r/min的转速下处理80min，冷却、抽滤、干燥后得到改性后的碳纳米管；
S2、取硬脂酸钙、硬脂酸锌、改性后的碳纳米管、4,4-二苯基-2,2-二联吡啶、二甲基亚砜，在70℃、1400r/min的条件下搅拌30min，冷却后得到钙锌稳定剂。
实施例二至四的钙锌稳定剂的制备方法与实施例一相同，实施例一至实施例四的原料用量以及反应条件如表3、表4所示。
表3各实施例中钙锌稳定剂的原料用量(以重量份数计)
Figure BDA0003669421290000092
表4各实施例中制备钙锌稳定剂的反应条件
Figure BDA0003669421290000101
实施例一至实施例四制备得到的墙板的性能如表5所示。
表5各实施例制备得到墙板的性能
Figure BDA0003669421290000102
综上所述，本发明制备得到的墙板包括发泡层，通过发泡工艺使发泡层结构内部形成无数均匀细腻的气泡，成型后的发泡层形成均匀的泡孔，大大降低了墙板的密度，降低了安装难度，同时隔音效果良好。发泡层的上下两层设置有面皮层和底皮层，使墙板的稳定性更强。
对比例一与实施例一的不同之处在于，钙锌稳定剂的原料为硬脂酸钙、硬脂酸锌。
对比例二与实施例一的不同之处在于，钙锌稳定剂的原料为硬脂酸钙、硬脂酸锌、碳纳米管、3-氨基丙基三甲氧基硅烷。
对比例一、二制备得到的墙板的性能如表6所示。
表6对比例一、二制备得到墙板的性能
Figure BDA0003669421290000111
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (8)

1.一种墙板，其特征在于，依次包括面皮层、发泡层、底皮层；所述发泡层，以重量份数计，包括以下原料：PVC树脂70-90份、轻质碳酸钙90-120份、钙锌稳定剂8-10份、发泡调节剂8-15份、黄发泡剂0.2-0.8份，所述轻质碳酸钙为1200-1300目；
所述钙锌稳定剂，包括以下原料：钙盐主稳定剂、锌盐主稳定剂、碳纳米管、硅烷偶联剂、4,4`-二苯基-2,2`-二联吡啶、二甲基亚砜；
所述钙锌稳定剂的原料，以质量份数计，钙盐主稳定剂10-30份、锌盐主稳定剂20-60份、碳纳米管5-7份、硅烷偶联剂5-10份、4,4`-二苯基-2,2`-二联吡啶2-4份、二甲基亚砜20-30份；
所述钙锌稳定剂的制备过程，至少包括以下步骤：
S1、取经过处理的碳纳米管、硅烷偶联剂溶液混合，在40-50℃、1200-1400r/min的转速下处理80-100min，冷却、抽滤、干燥后得到改性后的碳纳米管；
S2、取钙盐主稳定剂、锌盐主稳定剂、改性后的碳纳米管、4,4`-二苯基-2,2`-二联吡啶、二甲基亚砜，在60-80℃、1200-1500r/min的条件下搅拌20-40min，冷却后得到钙锌稳定剂。
2.根据权利要求1所述的一种墙板，其特征在于：所述钙盐主稳定剂为硬脂酸钙、棕榈酸钙、月桂酸钙中的任意一种；所述锌盐主稳定剂为硬脂酸锌、棕榈酸锌、月桂酸锌中的任意一种。
3.根据权利要求1所述的一种墙板，其特征在于：所述钙盐主稳定剂与锌盐主稳定剂的质量比为1:2-4。
4.根据权利要求1所述的一种墙板，其特征在于：所述硅烷偶联剂为3-氨基丙基三甲氧基硅烷、γ-氨丙基三乙氧基硅烷、3-(2,3-环氧丙氧)丙基三甲氧基硅烷、N-β-(氨乙基)-γ-氨丙基三甲氧基硅烷、N-(β-氨乙基)-γ-氨丙基三乙氧基硅烷中的任意一种。
5.根据权利要求1所述的一种墙板，其特征在于：所述发泡调节剂为高分子丙烯酸树脂。
6.根据权利要求1所述的一种墙板，其特征在于：所述面皮层与底皮层的原料包括，以重量份数计，PVC树脂75-90份、重质碳酸钙150-180份、钙盐稳定剂8-10份、成型剂CPE 2.5-3份、增韧剂ACR 3-6份、内润滑剂G60 1-2份、外润滑剂PE蜡1-2份、炭黑0.5份。
7.根据权利要求1所述的一种墙板，其特征在于：所述面皮层上依次设置有彩膜层、PET膜层、UV涂层。
8.一种如权利要求1-7任意一项所述墙板的制备工艺，其特征在于：
A、取面皮层与底皮层的原料加入高速搅拌机，升温至100-120℃时出料，得到混合料a；
B、当混合料a降温后，将混合料a送入1号双螺旋挤出机，螺筒温度为160℃-200℃；之后混合料a经螺杆进入模具，模具内部设置有分配器，将混合料a分成面皮层物料与底皮层物料；
C、取发泡层的原料加入高速搅拌机，升温至100-120℃时出料，得到混合料b；
D、当混合料b降温后，将混合料b送入2号双螺杆挤出机，螺筒温度为160℃-180℃；之后混合料b经螺杆进入模具，形成发泡层；
E、步骤B中1号挤出机的挤出物料进入模具流道分配器与步骤D中2号挤出机挤出的物料在模头处汇合，再经模头的模口共挤挤出，由此物料出模口形成ABA三层结构的基材，其中中间层为发泡层，上下两层分别为面皮层和底皮层；
F、拉制步骤E得到的基材，经过SPC五辊压机进一步的调整厚度，之后在面皮层表面依次设置彩膜层、PET层、UV涂层，得到墙板。
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