CN106366496A - 一种pvc木塑发泡板及其制备方法 - Google Patents
一种pvc木塑发泡板及其制备方法 Download PDFInfo
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- CN106366496A CN106366496A CN201610750654.5A CN201610750654A CN106366496A CN 106366496 A CN106366496 A CN 106366496A CN 201610750654 A CN201610750654 A CN 201610750654A CN 106366496 A CN106366496 A CN 106366496A
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- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
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- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
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Abstract
本发明公开了一种PVC木塑发泡板及其制备方法,属于木塑材料领域。本发明以PVC树脂为主要材料,添加PVC回收料、碳酸钙及各种助剂,经过配料、投料、混料、挤出、定型冷却和切割等工艺制成PVC木塑发泡板。本发明根据各助剂的性能及各助剂之间的反应能力按照一定的顺序混合各种原料,选出最佳的加工工艺参数,确保各助剂能充分发挥各自的作用以及相互配合发挥更大的作用,配方中添加了热变形改进剂、候改进剂、腐蚀改性剂,制得的PVC木塑发泡板的热变形温度达到100~110℃,能适用于各种高温恶劣苛刻环境,耐腐蚀、耐候性能优异,能长时间暴露在室外紫外线、潮湿、光照及臭氧条件下,极大地扩大了PVC木塑发泡板的应用范围。
Description
技术领域
本发明涉及木塑材料领域,具体为一种PVC木塑发泡板及其制备方法。
技术背景
PVC木塑复合材料是国内外近年蓬勃兴起的一类新型复合材料,指利用聚氯乙烯与木粉、稻壳、竹粉等植物纤维混合成新的木质材料,混配和造粒而制备的复合材料颗粒。再经挤压、模压、注射成型等塑料加工工艺,生产出的板材或型材,主要用于建材、家具、物流包装等行业。
PVC木塑板可以在表面印刷,覆膜,压花、喷涂,还可以像木材一样锯、钻、钉、刨、焊、粘和热成型等良好的加工性能,广泛用于广告雕刻、广告写真、展板、建筑装饰、房间隔断、厨柜浴柜等,是典型的绿色环保材料,发展前景大。
然而,PVC木塑发泡板是用PVC材料制成的一种板材,它重量轻,有一定强度,但耐候性不佳,热变形温度较低,耐腐蚀性较差。PVC材料的耐高温性不好,在较热的环境中工作容易变形。对于在室外暴露的广告牌等,因夏天天气炎热,受阳光直射,长期暴晒,温度较高,而且紫外线强,如果使用PVC木塑发泡板,则容易出现变形,因耐候性不佳,容易老化。所以目前PVC木塑发泡板多用于产品包装和室内装修,其他环境温度较高,如室外、高温环境区、室内的灶台等,因温度较高而鲜少使用,严重影响其应用范围。目前的PVC板材的耐腐蚀性能还达不到一些行业的标准,如化工、冶炼等领域,同样影响到其应用范围。
发明内容
本发明的目的是提供一种PVC木塑发泡板及其制备方法,以解决现有技术中的PVC木塑发泡板存在热变形温度较低、耐候性不佳、耐腐蚀性较差、应用范围受限制等问题。
本发明的技术方案如下:
一种PVC木塑发泡板,按重量份数计,成分组成如下:
PVC 树脂75~90份,复合稳定剂3~5份,热变形改进剂4~8份,耐候改性剂3~5份,耐腐蚀改性剂 5~8份, PVC内润滑剂0.6~0.8份,PE蜡0.3~0.5份,ACR加工助剂6~8份,碳酸钙45~50份,木粉10~15份,氧化聚乙烯蜡0.4~0.6份,偶氮二甲酰胺AC发泡剂 0.3~0.5份,PVC回收料40~50份,碳酸氢钠0.8~1.2份,大豆油0.5~0.8份。
PVC树脂为SG-5型或SG-6型树脂;
复合稳定剂为复合铅稳定剂;
热变形改进剂为双环戊二烯二甲酸钠和SMA树脂;
耐候改进剂为铝粉;
耐腐蚀改性剂为环氧玻璃鳞片胶泥和硅质胶泥;
PVC内润滑剂为润滑剂OA9;
ACR加工助剂为ACR-401或ACR-530;
碳酸钙为纳米级碳酸钙;
木粉为桉树木粉。
上述技术方案中,所述双环戊二烯二甲酸与SMA树脂的质量比=3~5:1~2。
上述技术方案中,作为优选方式,所述双环戊二烯二甲酸钠与SMA树脂的质量比为3:2。
上述技术方案中,所述环氧玻璃鳞片胶泥与硅质胶泥的质量比=1~3:3~5。
上述技术方案中,作为优选方式,所述环氧玻璃鳞片胶泥与硅质胶泥的质量比为3:5。
上述技术方案中,作为优选方式,所述耐候改性剂为铝粉4份。
上述技术方案中,作为优选方式,按重量份数计,所述成分组成如下:PVC 树脂为SG-5型或SG-6型树脂80~85份,复合铅稳定剂3~4份,热变形改进剂为双环戊二烯二甲酸钠和SMA树脂5~6份,耐候改性剂为铝粉4~5份,耐腐蚀改性剂为环氧玻璃鳞片胶泥和硅质胶泥共6~7份, PVC内润滑剂为润滑剂OA9 0.6~0.7份,PE蜡0.4~0.5份, ACR加工助剂为ACR-401或ACR-530 6~8份,纳米级碳酸钙46~48份,桉树木粉12~13份,氧化聚乙烯蜡0.4~0.5份,偶氮二甲酰胺AC发泡剂 0.4~0.5份,PVC回收料42~45份,碳酸氢钠0.9~1.0份,大豆油0.6~0.7份。
一种上述PVC木塑发泡板的制备方法,包括如下步骤:
(1)配料:按PVC木塑发泡板的成分组成称量原材料;
(2)投料:启动高搅锅电机,将转速调到300转每分钟后进行投料,原材料按PVC树脂→热变形改进剂→耐候改性剂→复合稳定剂→ACR加工助剂→PVC内润滑剂→PE蜡→木粉→氧化聚乙烯蜡→耐腐蚀改性剂→碳酸氢钠→偶氮二甲酰胺AC发泡剂→碳酸钙→PVC回收料顺序投入高搅锅中;
(3)混料:原料在高搅锅中搅拌混合,温度达到80℃时,添加液态助剂大豆油,当温度达到115~120℃时,将物料排至低搅锅混合,当温度到达40~50℃时,送料至螺杆挤出机料斗;
(4)挤出:螺杆挤出机将步骤(3)所得的物料进行挤压加工成板状熔融物料;
(5)定型冷却:将步骤(4)所得的板状熔融物料输送至定型台,经过定型冷却得到板材;
(6)切割:根据生产要求将步骤(5)得到的板材经过切割锯进行切割,得到PVC木塑发泡板。
上述技术方案中,所述步骤(3)中高搅锅的电机搅拌转速为1400~1500转每分钟,搅拌8~12分钟达到115℃;低搅锅的转速为90~100转每分钟。
上述技术方案中,所述步骤(4)中螺杆挤出机的操作工艺条件为:螺杆转速为18~25r/min,螺杆油温为90~100℃,机筒温度为150~170℃,模具温度为170~180℃,模唇温度为130~150℃。
有益效果:1、本发明选择双环戊二烯二甲酸钠和SMA树脂按一定配比混合作为热变形改进剂,双环戊二烯二甲酸钠可提高PVC的有效热使用温度,可以使PVC板材或管材加热到100度可以随意变形,双环戊二烯二甲酸钠具有记忆性,可通过将其加热恢复到原状。通过双环戊二烯二甲酸钠和SMA树脂进行一定比例的复合调配,根据两者的化学结构和性能特点,通过两者相互反应和配合,能使PVC木塑发泡板耐热性优异,在高温环境中使用也不易变形,同时可增加PVC木塑发泡板的刚度、拉伸强度。
本发明产品的热变形温度达到100~110℃,能适用于各种高温恶劣苛刻环境,解决了目前PVC木塑发泡板在室外、高温环境区如蒸汽房、锅炉房等因环境温度较高而鲜少使用的问题,大大地扩大了PVC木塑发泡板的应用范围。同时,该混合型热变形改进剂能有效提高PVC木塑发泡板的拉伸强度和断裂拉伸率,拉伸强度能提高10~20%,断裂伸长率能提高30~50%。
2、本发明在配方中添加了耐候改进剂铝粉,铝粉对光和热的反射性强,具有极佳的耐候性,通过对入射紫外线进行有效的反射或折射,达到防紫外线辐射的目的,添加了一定量铝粉的PVC木塑发泡板能长时间暴露在室外紫外线、潮湿、雨淋、光照等条件下,在恶劣的环境中能保持良好的耐候性,同时能承受热水处理和清洁剂清洗。由于其良好耐候性能和表面光泽度,可以直接替代喷漆的ABS,减少了喷漆工序,而且不用担心漆层脱落的问题。用添加了铝粉制造的PVC木塑发泡板耐候性能优异,抗老化性能强,为PVC木塑发泡板在室外应用提供了保障。
3、本发明在配方中添加了环氧玻璃鳞片胶泥和硅质胶泥混合型防腐蚀改性剂,环氧玻璃鳞片胶泥中含有大量玻璃鳞片,制成PVC木塑发泡板后屏蔽性强,能有效阻止腐蚀介质的渗透,达到隔离目的。硅质胶泥的主要含量为二氧化硅和氧化铝,能承受强酸强碱的腐蚀。环氧玻璃鳞片胶泥和硅质胶泥添加在PVC木塑发泡板中,经过两者的相互融合,耐腐蚀性能更强,能耐酸、耐碱、耐盐水、耐油性,兼有防腐、防紫外线照射的功能。添加了该混合型防腐蚀改进剂的PVC木塑发泡板能 广泛用于化工,电镀,冶炼,水处理等领域,可用于防腐蚀的设备衬里,也可作为一般电气绝缘及密封衬垫等材料。同时可用于实验室、碱性较强的存储室等特殊场所,极大地扩大了PVC木塑发泡板的应用范围。
4、在生产过程中,各组分及助剂混合后对PVC板材的各种性能会产生相互交叉影响,所以份量的配比很重要。各助剂之间、各助剂与PVC树脂的相互包覆、反应、互溶能力不一样,某些助剂间相互反应后可能会降低某助剂的某项性能,所以添加原料的顺序也是非常重要的。本发明通过反复调配对比,根据各助剂的性能及各助剂之间的反应能力按照一定的顺序混合各种原料,确定各原料的配比,根据原料配比选出最佳的加工工艺参数,最终得出了优异的工艺步骤及工艺条件,确保各助剂能充分发挥各自的作用以及相互配合发挥更大的作用,使PVC木塑发泡板各方面性能优异。
具体实施方式
在具体实施方式中,按重量份数计,本发明PVC木塑发泡板的成分组成如下:
PVC树脂,选用SG-5型或SG-6型树脂75~90份,作用是把填料和各种助剂粘合在一起,具有一定机械物理性能。
复合稳定剂为复合铅稳定剂3~5份,能与PVC树脂混合分散均匀,提高PVC树脂的稳定性和加工性能,保证PVC发泡板不容易降解,性能稳定。
热变形改进剂为双环戊二烯二甲酸钠和SMA树脂共4~8份,质量比按双环戊二烯二甲酸钠:SMA树脂=3~5:1~2;通过两者按一定比例调配,提高PVC木塑发泡板耐热性。
耐候改进剂为铝粉,3~5份;铝粉由于特殊的结构和组成具有极佳的耐候性,能防紫外线辐射,抗老化。
耐腐蚀改性剂为环氧玻璃鳞片胶泥和硅质胶泥共5~8份,质量比按环氧玻璃鳞片胶泥:硅质胶泥=1~3:3~5;作用是提高PVC木塑发泡板的耐酸碱腐蚀性。
PVC内润滑剂为润滑剂OA9, 0.6~0.8份,高温润滑剂OA9是一种新型高分子氧化聚合物,作用是减少热PVC树脂熔解的粘着力,改善其流动性,提高产量,同时提高成品的光泽,改善外观质量。
ACR加工助剂为ACR-401或ACR-530, 6~8份,能提高PVC木塑发泡板的加工性能。
碳酸钙为纳米级碳酸钙45~50份,作为填充剂,使PVC木塑发泡板增量,以达到降低生产成本的目的,纳米级碳酸钙因大的比表面积和小尺寸效应,在一定添加量内可以使PVC体系增韧,起到补强增韧作用。纳米级碳酸钙的添加量很重要,填加量较少时,会降低PVC体系的塑化速度,延迟塑化时间,填充量较高或使用表面活性较大的活性碳酸钙时,对润滑剂吸附量增加,碳酸钙颗粒间及其与加工设备之间会产生较大的摩擦热,加速塑化。
木粉为桉树木粉 10~15份,其作用是提高PVC木塑发泡板的刚性和外观效果。
PE蜡0.3~0.5份,其作用是在PVC木塑发泡板加工中改善PVC树脂的流动性和制品的脱模性,防止在机内或模具内因粘着而产生缺陷,提高PVC木塑发泡板的表面外观质量。
氧化聚乙烯蜡0.4~0.6份,具体很好的润湿性、分散性、偶联性,能显著提高PVC木塑发泡板的加工性能。
偶氮二甲酰胺AC发泡剂0.3~0.5份,使PVC发泡板形成多孔结构,从而降低PVC发泡板密度。
PVC回收料40~50份,通过对PVC废料的回收利用,能大大降低成本,环保节能;
碳酸氢钠0.8~1.2份,其作用是与偶氮二甲酰胺AC发泡剂配合,有效降低发泡成本,改善加工工艺。
大豆油0.5~0.8份,环氧大豆油,与复合铅稳定剂的协同使用,使稳定效果更好,同时能促进配方中各种成分充分发挥各自的作用。
所述的PVC木塑发泡板的制备方法,包括如下步骤:
(1)配料:按PVC木塑发泡板的成分组成称量原材料;
(2)投料:启动高搅锅电机,将转速调到300转每分钟后进行投料,原材料按PVC树脂→热变形改进剂→耐候改性剂→复合稳定剂→ACR加工助剂→PVC内润滑剂→PE蜡→木粉→氧化聚乙烯蜡→耐腐蚀改性剂→碳酸氢钠→偶氮二甲酰胺AC发泡剂→碳酸钙→PVC回收料顺序投入高搅锅中;
(3)混料:调节高搅锅的电机搅拌转速为1400~1500转每分钟,原料在高搅锅中搅拌混合,温度达到80℃时,添加液态助剂大豆油,控制搅拌8~12分钟温度达到115℃,当温度达到115~120℃时,将物料排至低搅锅混合,低搅锅的转速为90~100转每分钟,当温度到达40~50℃时,送料至螺杆挤出机料斗;
(4)挤出:螺杆挤出机将步骤(3)所得的物料进行挤压加工成板状熔融物料;
(5)定型冷却:将步骤(4)所得的板状熔融物料输送至定型台,经过定型冷却得到板材;
(6)切割:根据生产要求将步骤(5)得到的板材经过切割锯进行切割,得到PVC木塑发泡板。
所述的PVC木塑发泡板的制备方法,步骤(4)中螺杆挤出机的操作工艺条件为:螺杆转速为18~25r/min,螺杆油温为90~100℃,机筒温度为150~170℃,模具温度为170~180℃,模唇温度为130~150℃。
上述技术方案制得的PVC木塑发泡板的技术指标如下:
简支梁冲击强度:45~65 kJ/m3;热变形温度:100~110℃;表观密度:460~650kg/m3;弯曲强度:10~16 MPa;弯曲弹性模量:1.1×103~2.5×103MPa;拉伸强度:12~20MPa;线性膨胀系数:4.0×10-5~6.0×10-5;燃烧性能:A-0mm/min;吸水率:0.6~0.9%;厚度极限偏差:-0.12~+0.10mm;握螺钉力:650~850N。
下面,针对具体实施例对本发明进行详细说明。
实施例1
按重量份数计,本实施例PVC木塑发泡板成分组成如下:
PVC 树脂(SG-5型)80份;
复合铅稳定剂4份;
热变形改进剂:双环戊二烯二甲酸钠5份,SMA树脂2份;
耐候改性剂(铝粉)4份;
耐腐蚀改性剂:环氧玻璃鳞片胶泥3份,硅质胶泥4份;
PVC内润滑剂(润滑剂OA9)0.7份;
PE蜡0.4份;
ACR加工助剂(ACR-401)7份;
纳米级碳酸钙46份;
木粉(桉树木粉)13份;
氧化聚乙烯蜡0.5份;
偶氮二甲酰胺AC发泡剂 0.4份;
PVC回收料45份;
碳酸氢钠1.0份;
大豆油0.7份。
上述PVC木塑发泡板制备方法如下:
(1)配料:按PVC木塑发泡板的成分组成称量原材料;
(2)投料:启动高搅锅电机,将转速调到300转每分钟后进行投料,原材料按PVC树脂→热变形改进剂→耐候改性剂→复合稳定剂→ACR加工助剂→PVC内润滑剂→PE蜡→木粉→氧化聚乙烯蜡→耐腐蚀改性剂→碳酸氢钠→偶氮二甲酰胺AC发泡剂→碳酸钙→PVC回收料顺序投入高搅锅中;
(3)混料:调节高搅锅的电机搅拌转速为1450转每分钟,原料在高搅锅中搅拌混合,温度达到80℃时,添加液态助剂大豆油,控制升温速率,搅拌8~12分钟内达到115℃,当温度达到118℃时,将物料排至低搅锅混合,低搅锅的转速为950转每分钟,当温度到达45℃时,送料至螺杆挤出机料斗;
(4)挤出:螺杆挤出机将步骤(3)所得的物料进行挤压加工成板状熔融物料;
(5)定型冷却:将步骤(4)所得的板状熔融物料输送至定型台,经过定型冷却得到板材;
(6)切割:根据生产要求将步骤(5)得到的板材经过切割锯进行切割,得到PVC木塑发泡板。
本实施例中,步骤(4)中螺杆挤出机的操作工艺条件为:螺杆转速为20r/min,螺杆油温为95℃,机筒温度为165℃,模具温度为175℃,模唇温度为140℃。
本实施例中,PVC木塑发泡板的技术指标如下:
简支梁冲击强度:52 kJ/m3;热变形温度:104℃;表观密度:500kg/m3;弯曲强度:102MPa;弯曲弹性模量:1. 5×103MPa;拉伸强度:16MPa;线性膨胀系数:5.0×10-5;燃烧性能:A-0mm/min;吸水率:0.7%;厚度极限偏差:-0.12~+0.10mm;握螺钉力:760N。
实施例2
与实施例1不同之处在于,按重量份数计,本实施例PVC木塑发泡板的成分组成如下:
PVC 树脂(SG-6型)75份;
复合铅稳定剂3份;
热变形改进剂:双环戊二烯二甲酸钠4份,SMA树脂2份;
耐候改性剂(铝粉)3份;
耐腐蚀改性剂:环氧玻璃鳞片胶泥2份,硅质胶泥5份;
PVC内润滑剂(润滑剂OA9)0.6份;
PE蜡0.3份;
ACR加工助剂(ACR-401)6份;
纳米级碳酸钙45份;
木粉(桉树木粉)10份;
氧化聚乙烯蜡0.4份;
偶氮二甲酰胺AC发泡剂 0.3份;
PVC回收料40份;
碳酸氢钠0.8份;
大豆油0.5份。
本实施例中,PVC木塑发泡板的技术指标如下:
简支梁冲击强度:48kJ/m3;热变形温度:102℃;表观密度:465kg/m3;弯曲强度:12MPa;弯曲弹性模量:1.3×103MPa;拉伸强度:14MPa;线性膨胀系数:4.6×10-5;燃烧性能:A-0mm/min;吸水率:0.7%;厚度极限偏差:-0.12~+0.10mm;握螺钉力:680N。
实施例3
与实施例1不同之处在于,按重量份数计,本实施例PVC木塑发泡板的成分组成如下:
PVC 树脂(SG-5型)90份;
复合铅稳定剂5份;
热变形改进剂:双环戊二烯二甲酸钠3份,SMA树脂2份;
耐候改性剂(铝粉)5份;
耐腐蚀改性剂:环氧玻璃鳞片胶泥3份,硅质胶泥3份;
PVC内润滑剂(润滑剂OA9)0.8份;
PE蜡0.5份;
ACR加工助剂(ACR-401或ACR-530)8份;
纳米级碳酸钙48份;
木粉(桉树木粉)13份;
氧化聚乙烯蜡0.6份;
偶氮二甲酰胺AC发泡剂 0.5份;
PVC回收料50份;
碳酸氢钠1.2份;
大豆油0.7份。
本实施例中,PVC木塑发泡板的技术指标如下:
简支梁冲击强度: 64 kJ/m3;热变形温度:109℃;表观密度:463kg/m3;弯曲强度: 15MPa;弯曲弹性模量: 2.3×103MPa;拉伸强度:18MPa;线性膨胀系数: 5.7×10-5;燃烧性能:A-0mm/min;吸水率:0.8%;厚度极限偏差:-0.12~+0.10mm;握螺钉力:830N。
实施例4
与实施例1不同之处在于,按重量份数计,本实施例PVC木塑发泡板的成分组成如下:
PVC 树脂(SG-6型)85份;
复合铅稳定剂5份;
热变形改进剂:双环戊二烯二甲酸钠3份,SMA树脂2份;
耐候改性剂(铝粉)5份;
耐腐蚀改性剂:环氧玻璃鳞片胶泥2份,硅质胶泥4份;
PVC内润滑剂(润滑剂OA9)0.6份;
PE蜡0.3份;
ACR加工助剂(ACR-530)8份;
纳米级碳酸钙47份;
木粉(桉树木粉)12份;
氧化聚乙烯蜡0.5份;
偶氮二甲酰胺AC发泡剂 0.5份;
PVC回收料46份;
碳酸氢钠0.9份;
大豆油0.6份。
本实施例中,PVC木塑发泡板的技术指标如下:
简支梁冲击强度:53 kJ/m3;热变形温度:106℃;表观密度:490kg/m3;弯曲强度:15MPa;弯曲弹性模量: 2.0×103MPa;拉伸强度:16MPa;线性膨胀系数:4.9×10-5;燃烧性能:A-0mm/min;吸水率:0.6%;厚度极限偏差:-0.12~+0.10mm;握螺钉力:780N。
Claims (10)
1.一种PVC木塑发泡板,其特征在于,按重量份数计,成分组成如下:
PVC 树脂75~90份,复合稳定剂3~5份,热变形改进剂4~8份,耐候改性剂3~5份,耐腐蚀改性剂 5~8份, PVC内润滑剂0.6~0.8份,PE蜡0.3~0.5份,ACR加工助剂6~8份,碳酸钙45~50份,木粉10~15份,氧化聚乙烯蜡0.4~0.6份,偶氮二甲酰胺AC发泡剂 0.3~0.5份,PVC回收料40~50份,碳酸氢钠0.8~1.2份,大豆油0.5~0.8份;
PVC树脂为SG-5型或SG-6型树脂;
复合稳定剂为复合铅稳定剂;
热变形改进剂为双环戊二烯二甲酸钠和SMA树脂;
耐候改进剂为铝粉;
耐腐蚀改性剂为环氧玻璃鳞片胶泥和硅质胶泥;
PVC内润滑剂为润滑剂OA9;
ACR加工助剂为ACR-401或ACR-530;
碳酸钙为纳米级碳酸钙;
木粉为桉树木粉。
2.根据权利要求1所述的PVC木塑发泡板,其特征在于,所述双环戊二烯二甲酸与SMA树脂的质量比=3~5:1~2。
3.根据权利要求2所述的PVC木塑发泡板,其特征在于,所述双环戊二烯二甲酸钠与SMA树脂的质量比为3:2。
4.根据权利要求1所述的PVC木塑发泡板,其特征在于,所述环氧玻璃鳞片胶泥与硅质胶泥的质量比=1~3:3~5。
5.根据权利要求4所述的PVC木塑发泡板,其特征在于,所述环氧玻璃鳞片胶泥与硅质胶泥的质量比为3:5。
6.根据权利要求1所述的PVC木塑发泡板,其特征在于,所述耐候改性剂为铝粉4份。
7.根据权利要求1所述的PVC木塑发泡板,其特征在于,按重量份数计,所述成分组成如下:PVC 树脂为SG-5型或SG-6型树脂80~85份,复合铅稳定剂3~4份,热变形改进剂为双环戊二烯二甲酸钠和SMA树脂5~6份,耐候改性剂为铝粉4~5份,耐腐蚀改性剂为环氧玻璃鳞片胶泥和硅质胶泥共6~7份, PVC内润滑剂为润滑剂OA9 0.6~0.7份,PE蜡0.4~0.5份, ACR加工助剂为ACR-401或ACR-530 7~8份,纳米级碳酸钙46~48份,桉树木粉12~13份,氧化聚乙烯蜡0.4~0.5份,偶氮二甲酰胺AC发泡剂 0.4~0.5份,PVC回收料42~45份,碳酸氢钠0.9~1.0份,大豆油0.6~0.7份。
8.一种权利要求1所述的PVC木塑发泡板的制备方法,其特征在于,包括如下步骤:
(1)配料:按PVC木塑发泡板的成分组成称量原材料;
(2)投料:启动高搅锅电机,将转速调到300转每分钟后进行投料,原材料按PVC树脂→热变形改进剂→耐候改性剂→复合稳定剂→ACR加工助剂→PVC内润滑剂→PE蜡→木粉→氧化聚乙烯蜡→耐腐蚀改性剂→碳酸氢钠→偶氮二甲酰胺AC发泡剂→碳酸钙→PVC回收料顺序投入高搅锅中;
(3)混料:原料在高搅锅中搅拌混合,温度达到80℃时,添加液态助剂大豆油,当温度达到115~120℃时,将物料排至低搅锅混合,当温度到达40~50℃时,送料至螺杆挤出机料斗;
(4)挤出:螺杆挤出机将步骤(3)所得的物料进行挤压加工成板状熔融物料;
(5)定型冷却:将步骤(4)所得的板状熔融物料输送至定型台,经过定型冷却得到板材;
(6)切割:根据生产要求将步骤(5)得到的板材经过切割锯进行切割,得到PVC木塑发泡板。
9.根据权利要求8所述的PVC木塑发泡板的制备方法,其特征在于,步骤(3)中高搅锅的电机搅拌转速为1400~1500转每分钟,搅拌8~12分钟达到115℃;低搅锅的转速为90~100转每分钟。
10.根据权利要求8所述的PVC木塑发泡板的制备方法,其特征在于,步骤(4)中螺杆挤出机的操作工艺条件为:螺杆转速为18~25r/min,螺杆油温为90~100℃,机筒温度为150~170℃,模具温度为170~180℃,模唇温度为130~150℃。
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CN110396302A (zh) * | 2019-07-24 | 2019-11-01 | 宣城福美达新材料有限公司 | 一种防腐耐磨复合木塑地板 |
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CN111217553A (zh) * | 2020-01-14 | 2020-06-02 | 山西碳金科技有限公司 | 一种煤矸石/pvc树脂人造石板材及其制备方法 |
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