2014年硬质PVC发泡制品行业状况及发展建议

介绍了2014年硬质PVC发泡制品行业的发展状况,详细分析了下游房地产行业的发展趋势,重点介绍了硬质PVC发泡实心板、硬质PVC发泡中空格子板、室内外装饰用硬质PVC发泡材料等主要产品的市场情况,并对行业的发展提出了建议。     

低发泡RPVC挤出成型的配方和工艺研究

提出了低发泡硬质聚氯乙烯挤出成型的配方和工艺。研究了稳定型,改性剂等配方因素对制品密度、表面、泡孔结构的影响,并讨论了制品密度与挤出工艺的关系。     

硬质PVC模压低发泡材料的应用

用模压发泡工艺，研究了PVC的低发泡模压成型工艺条件及配方。讨论了加工温度、时间、发泡剂、填充剂、改性剂的种类及用量对PVC泡孔的均匀程度及制品密度的影响。结果表明在合适的加工条件下．发泡剂AC(偶氮二甲酰胺)为0．8份、NaHCO，为0．8份，改性剂PS为8份、0PE为7份。填充剂CaCO3为5份、TiO2为2份时密度达到了0．544g／ml，且泡孔结构良好。     

Celuka法硬质PVC低发泡板材的挤出

硬质PVC（PVC一U）低发泡板材的生产技术在国外研究较早,发展也相对较成熟。国内该产品的研究开发还是近些年的事情,相关的理论与实用技术的著述并不多见。硬质PVC低发泡板材（以下简称板材）是以PVC树脂为主体原料,与一定量的发泡剂和其它助剂互相混合,经挤出制得的PVC发泡制品。通常发泡制品按其体积密度可分为低密度、中密度、高密度3类,体积密度高于0．4g／cm3的为低发泡制品［1]。板材的密度一般大于0．5g／cm3。通常,按发泡制品的弹性模量分为软发泡制品和硬发泡制品。弹性模量大于70MPa的为硬质发泡制品[1]。板材的弹…     

氯丁胶改性聚氯乙烯软发泡制品

研究了以聚氯乙烯(PVC)为主体，氯丁胶(CR)为改性剂的一次性发泡工艺。分析各组份对软PVC泡沫性能的影响；超细度碳酸钙填充改性可以提高制品的回弹性及拉伸强度，且填充量较大时，对制品的硬度、密度及其它性能影响较小，有利于降低成本；共混体中，还必须加入一定量的增容剂，以增加CR与PVC的相容性，促进发泡。     

硬质PVC管材配方与工艺设计原则

1设计配方的原则 设计配方的原则是根据制品具体的使用要求,按照我国已经制定的各类管材标准进行,管材配方中包含:PVC 树脂、冲击改性剂、稳定剂、加工改性剂、填充剂、色料及外润滑剂等.     

钙锌复合稳定剂JXW-5109在硬质PVC低发泡板材中的应用

对比了钙锌复合稳定剂JXW-5109与铅盐复合稳定剂307在硬质PVC低发泡板材中的应用效果。结果表明:JXW-5109可替代307用于硬质PVC低发泡板材的生产,且制品更加环保。     

硬质PVC发泡装饰线条生产技术

介绍了硬质PVC发泡装饰线条工艺流程、主要生产设备和主体配方,讨论了配方体系中各组分的作用及对产品质量的影响。笔者认为:硬质PVC发泡装饰线条生产中发泡调节剂、发泡剂等是影响产品密度、生产稳定性的关键因素;加工助剂ACR、发泡调节剂、稳定剂等助剂中无效成分的含量和反作用是影响发泡稳定性、成品合格率的不可控因素,应引起足够重视。     

发展硬质发泡新技术,倡导低碳环保新材料——中国塑协硬质PVC发泡制品专委会2010年年会侧记

<正>中国塑协硬质PVC发泡制品专业委员会2010年年会暨技术交流会,于2010年12月2～3日在湖北黄石金花宾馆举行。这次会议是由中国塑协硬质PVC发泡制品专委会主办,由黄石鸿达集团有限公司承办,由河北     

硬质PVC发泡板材专用复合稳定剂CZX-238的配制及其应用简

用氢氧化锌、甘油为原料制备了甘油锌,将其作为一种新型聚氯乙烯（PVC）热稳定助剂用于硬质发泡板材专用环保热稳定剂CZX-238中.采用热老化烘箱法、刚果红法和动态流变测试研究了甘油锌在PVC制品中的热稳定性能.研究了CZX-238做硬质白色发泡板材稳定剂的相关性能和使用情况.CZX-238完全能满足硬质白色PVC发泡板材的加工需求.     

Mechanical properties of extrusion‐foamed rigid PVC/wood‐flour composites

This study was conducted to characterize the mechanical properties of extrusion‐foamed neat rigid PVC and rigid PVC/wood‐flour composites by using endothermic and exothermic chemical foaming agents (CFAs). The specific elongation at break (ductility) of the samples was improved by foaming, while the opposite trend was observed for the tensile strength and modulus of the samples, regardless of the chemical foaming agent type. In addition, experimental results indicated that foaming reduced the Izod impact resistance of both neat rigid PVC and rigid PVC/wood‐flour composites but that this reduction was not statistically significant for the composites. A comparison between batch microcellular processing and extrusion foam processing was made, which demonstrated that foams with very fine cells (microcellular processed) exhibit better impact strength than foams with larger cells (extrusion processed with CFAs).     

Foaming of rigid PVC/wood‐flour composites through a continuous extrusion process

The effects of chemical foaming agent (CFA) types (endothermic versus exothermic) and concentrations as well as the influence of all‐acrylic processing aid on the density and cell morphology of extrusion‐foamed neat rigid PVC and rigid PVC/wood‐flour composites were studied. Regardless of the CFA type, the density reduction of foamed rigid PVC/wood‐flour composites was not influenced by the CFA content. The cell size, however, was affected by the CFA type, independent of CFA content. Exothermic foaming agent produced foamed samples with smaller average cell sizes compared to those of endothermic counterparts. The experimental results indicate that the addition of an all‐acrylic processing aid in the formulation of rigid PVC/wood‐flour composite foams provides not only the ability to achieve density comparable to that achieved in the neat rigid PVC foams, but also the potential of producing rigid PVC/wood‐flour composite foams without using any chemical foaming agents.     

硬质PVC低发泡窗饰片材的工艺配方研究

研究了硬质KPVC低发泡窗饰片材的工艺配方及生产中易出现的问题。指出：（1）选择配方时，应选择来源可靠、质量稳定的原材料；根据不同的要求，可选用铅系或有机锡稳定体系，配以适量的润滑剂、发泡剂、加工助剂及改性剂。（2）挤出造粒时，应严格控制机头和均化段温度。（3）挤出成型时，机头和均化段温度是关键，采用较低的机身温度和较高的螺杆转速有利于提高产品质量。     

一种硬质PVC用复合发泡剂的制备及热性能研究

用碳酸氢钠（NaHCO3）、偶氮二甲酰胺（AC）及硬脂酸铅（PbSt）为原料制备吸放热复合发泡剂,通过差热与热重分析研究了发泡剂的热分解性能。结果表明：NaHCO3与AC之质量比为100∶20的发泡剂分解温度在170～188℃之间,且分解平稳,适合硬质PVC发泡材料加工。PbSt含量超过10%会影响发泡剂的分解率。用自制的吸-放热复合发泡剂用于硬质PVC挤出制备发泡材料,其密度可达约0.8g/cm3,且发泡材料泡孔细密均匀。     

Manufacture of rigid PVC/wood‐flour composite foams using moisture contained in wood as foaming agent

Relatioships between the density of foamed rigid PVC/wood‐flour composites and the moisture content of the wood flour, the chemical foaming agent (CFA) content, the content of all‐acrylic foam modifier, and the extruder die temperature were determined by using a response surface model based on a four‐factor central composite design. The experimental results indicated that there is no synergistic effect between teh CFA content and the moisture content of the wood flour. Wood flour moisture could be used effectively as foaming agent in the production of rigid PVC/wood‐flour composite foams. Foam density as low as 0.4 g/cm³ was produced without the use of chemical foaming agents. However, successful foaming of rigid PVC/wood‐flour composite with moisture contained in wood flour strongly depends upon the presence of all‐acrylic foam modifier in the formulation and the extrusion die temperature. The lowest densities were achieved when the all‐acrylic foam modifier concentration was between 7 phr and 10 phr and extruder die temperature was as low as 170°C.     

硬质PVC低发泡挤出技术

本文叙述了四种硬质PVC低发泡挤出成型工艺原理，介绍了国内外该项生产技术的现状，以硬质PVC芯层发泡管和发泡板材为实例阐述了它的应用前景。     

PVC发泡板材生产工艺和配方探讨

介绍了PVC发泡板材的生产工艺及配方,讨论了其配方设计,并给出了采用该配方生产的PVC发泡板材的性能指标。     

木粉特性对PVC／木塑发泡材料性能的影响

对木粉进行了热重分析,考察了木粉粒径及表面处理方法对PVC／木塑发泡材料性能的影响。结果表明：采用粒径117μm（120目）、经过硅烷类偶联剂处理的木粉制得的PVC／木塑发泡材料的综合性能较优;相同发泡剂用量下,PVC／木塑发泡材料密度随木粉用量的增加而增大,发泡效果变差。     

Development of poly(vinyl chloride)/wood composites. A literature review

Poly(vinyl chloride)/wood fiber (flour) composites are currently experiencing a dramatic increase in use. Most of them are used to produce window/door profiles, decking, railing, and siding by using conical counterrotating intermeshing twin‐screw extruders. Heat stabilizers, processing aids, impact modifiers, lubricants, and pigments are still important for PVC/wood composite formulations. Poly[methylene(polyphenyl isocyanate)] (PMPPIC), γ‐aminopropyltriethoxysilane, maleated polypropylene (MAPP), and copper metallic complex have proved to be effective coupling agents for this composite system. Mechanical properties of PVC/wood composites can be enhanced by combining wood with mica or glass fibers to form hybrid reinforcements. Ultraviolet light resistance and weathering dimensional stabilities of PVC/wood composites are superior to those of natural wood. Density reduction can be achieved through the microcellular foaming technique by using chemical blowing agents, such as azodicarbonamide and sodium bicarbonate, or physical blowing agents, such as carbon dioxide. J. Vinyl Addit. Technol. 10:59–69, 2004. © 2004 Society of Plastics Engineers.