电晕表面处理

本文叙述了广泛应用于粘接、印刷、染整、食品包装等方面的电晕表面处理装置的结构和原理,对影响产品质量的有关工艺、操作和设备的选型等方面也作了介绍.     

电晕处理对高聚物性能的影响

本文主要论述电晕处理后高聚物性能变化的情况,处理工艺条件、高聚物种类对处理效果的影响;以及影响处理效果退化的因素。     

聚丙烯薄膜的电晕处理

塑料具有广泛的可粘性和可印刷性。极性塑料的粘合性能明显优于非极性塑料,如聚乙烯和聚丙烯。聚烯烃的粘附性差往往是有利的。但为了能印刷和粘合,应提高其表面的粘合性能。为此,可进行化学腐蚀、火焰处理和电晕处理。得当的处理应使处理引起的变化仅限于薄薄的表面层上,材料应仍然保持良好的性能。     

电晕放电处理

综述了电晕放电处理的几种作用机理,简述了该技术在塑料表面接枝上应用的发展,并展望了在它纤维、纺织品整理上的应用。     

聚酯薄膜的电晕处理及其应用

讨论了聚酯薄膜电晕处理及其应用的关系,指出在一些应用范围电晕处理的必要性。简介了电晕处理的原理、工艺和要求,表明：为提高聚酯薄膜的印刷、粘合和真空镀金属（铝等）的效果,表面张力应达到52mN／m以上,且贮存2年内仍然保持不变。     

BOPP薄膜电晕处理及效果研究

介绍了聚丙烯双向拉伸(BOPP)薄膜的电晕处理原理，论述了处理设备、处理功率、预热温度、风门开启度以及添加剂和存放环境对电晕效果的影响。并讨论电晕处理过程中的常见问题及其纠正措施。     

塑料包装材料表面的电晕处理与火焰处理

本文分析了塑料包装材料印刷、粘接困难的原因、介绍了两种表面处理改性方法,即电晕处理和火焰处理,并对这两种方法处理效果的影响因素进行了讨论,指出了提高表面处理改性质量的主要因素。     

浅析薄膜电晕处理系统

为了提高薄膜的表面张力,使对薄膜的印刷、蒸镀,涂胶复合等加工牢固可靠,必须对薄膜表面进行电晕处理。本文就薄膜的电晕处理系统进行分析,以便获得薄膜在印刷,蒸镀等方面的最佳处理效果。     

塑料薄膜电晕处理效果的影响因素

本文论述丙烯薄膜电晕处理效果及处理工艺、添加剂含量以及薄膜存放条件对处理效果的影响。     

Corona Discharge Treatment of Polyolefins

The effects of corona discharge treatment on polyethylene and polypropylene homopolymers have been studied. X-ray photoelectron spectroscopy was used to determine surface compositions which were related to surface free energy estimates from contact angle measurements. Changes in composition and surface free energy were measured as a function of treatment level. The work of adhesion was seen to increase with oxygen incorporation. The increase was not linear and this is attributed to an increase in the degree of sub-surface to near-surface oxidation at intense treatment levels. Aging of samples followed by XPS and contact angle measurement showed that surface wettability is reduced whereas a slight increase in surface oxygen was found. This phenomenon was attributed to the reorientation/migration of functional groups. Morphological examination by scanning electron microscopy indicated no surface roughening at any power level.     

辐射交联发泡聚乙烯电晕处理研究

主要探讨了电晕处理对辐射交联聚乙烯发泡材料产品表面张力的改变规律。分析讨论了影响材料表面张力的主要因素,包括材料发泡倍率、电晕处理功率、生产线速度、产品厚度、温度等。结果表明,发泡倍率提高会提高材料表明张力;提高功率、减慢速度、提高温度都有助于改善电晕处理效果;电晕处理后表面张力衰减速度与存储条件有关,达到38mN/m后常温下可保持一周,但是衰减后再次电晕会容易。     

Some Effects of Corona Discharge Treatment of Biaxially-Oriented Polypropylene Film

The effects of the unit corona-treatment energy on the contact angle of various liquids, on the surface free energy, on the extent of oxidation of a surface layer, and on the adhesion of acrylic adhesive were studied using a biaxially-oriented polypropylene (BOPP) film. The surface free energy was determined with the van Oss-Chaudhury-Good (VCG) approach as well as with the wettability method. The extent of oxidation of the surface layer of the corona-treated BOPP film was evaluated with X-ray photoelectron spectroscopy. The adhesion strength of joints between the BOPP film and the acrylic adhesive was measured using the 180°-peel test.

In the range of the unit corona-treatment energy up to 1.2 kJ/m², a rapid increase in the surface free energy with the treatment energy is observed. In the range above that value, the surface free energy rises relatively slowly. The extent of oxidation of the surface layer and the adhesion strength of joints between the BOPP film and the acrylic adhesive are approximately in direct proportion to the unit energy of the corona treatment. A five-fold growth of the adhesion strength of the studied joints within the examined range of the treatment energy was found.     

Some Effects of Corona Discharge Treatment of Biaxially-Oriented Polypropylene Film

The effects of the unit corona-treatment energy on the contact angle of various liquids, on the surface free energy, on the extent of oxidation of a surface layer, and on the adhesion of acrylic adhesive were studied using a biaxially-oriented polypropylene (BOPP) film. The surface free energy was determined with the van Oss-Chaudhury-Good (VCG) approach as well as with the wettability method. The extent of oxidation of the surface layer of the corona-treated BOPP film was evaluated with X-ray photoelectron spectroscopy. The adhesion strength of joints between the BOPP film and the acrylic adhesive was measured using the 180°-peel test.

In the range of the unit corona-treatment energy up to 1.2 kJ/m², a rapid increase in the surface free energy with the treatment energy is observed. In the range above that value, the surface free energy rises relatively slowly. The extent of oxidation of the surface layer and the adhesion strength of joints between the BOPP film and the acrylic adhesive are approximately in direct proportion to the unit energy of the corona treatment. A five-fold growth of the adhesion strength of the studied joints within the examined range of the treatment energy was found.     

电晕处理对聚乙烯薄膜热封性能的影响

聚乙烯薄膜经过电晕处理后,热封温度提高,热封强度降低。这可通过降低电晕处理强度,适当延长热封时间和添加一定比例的mLLDPE树脂,以减小电晕处理对聚乙烯薄膜热封性能的影响。     

The Influence of Oxygen on the Nitrogen Corona Treatment of Polyolefins

The resultant surface activation of polymers by corona discharges has been found to be markedly influenced by the type and purity of gases used in the corona. In this work it is shown that for the nitrogen gas corona treatment (15 KV, 15 mins) of polyethylene and polypropylene, traces of oxygen, >0.5% and <0.15% respectively, are sufficient to produce chemical changes in the polymer surface.     

Improving the Adhesive Property of Polyester Fabric with Sodium Hydroxide and Corona Discharge Treatment

In this study, polyester fabric was treated with sodium hydroxide combined with corona discharge to modify the surface properties. This was done to improve its adhesive property to ensure effective sizing with starch under different conditions. Scanning electron microscopy photographs showed that the surface of polyester fiber was etched more by the combined process than that by either corona discharge treatment or sodium hydroxide treatment. The results showed that the adhesive property of polyester fabric with starch was improved as a result of the treatment with sodium hydroxide or by corona discharge. However, fabric treated by the combined methods showed even better results. This study shows great potential for applying corona discharge in the sizing process of polyester staple yarn.     

可里印耐低温流延聚丙烯包装膜电晕处理研究

采用3层流延共挤工艺,研究了不同抗静电剂对流延聚丙烯(CPP)薄膜润湿张力的影响,以及电晕处理功率、处理方式对薄膜润湿张力的影响。结果表明,添加牌号为ASPA 2446OB DC的抗静电剂,采用双站电晕处理的方法制得的双面爽滑的CPP薄膜30d后的润湿张力可保持在38mN/m以上,该薄膜既可里印又可热封,可不经复合直接用于低温包装。