衬布用聚氨酯热熔胶粉的研究

衬布业界非常期盼聚氨酯热熔胶粉的面世,以进一步提高衬布的品质.但自上世纪90年代以来的研究报道却表明,这一设想并不乐观.首先现有的聚氨酯热熔胶并不完全能满足衬布业的需要,其次对聚氨酯的粉碎有一定的困难.通过研究,采用化学粉碎法,用不同细化助剂进行粉碎实验,找到了一种可以使普通聚氨酯热熔胶粉碎成胶粉的有效途径.可制备出满足衬布行业性能要求的粉末.结果表明,相同粘接条件下,聚氨酯热熔胶粉的剥离强度比聚乙烯衬布用热熔胶粉大一倍以上.     

L型热熔胶的研制

一、前言 国外通常采用低温冷冻粉碎法制取高密度聚乙烯(HDPE)热熔胶,经过粉碎分级,制取符合颗粒要求的热熔胶粉末。这种方法工艺复杂,耗能大,成本高。我们在现有高密度聚乙烯生产工艺路线基础上,采用可调变的新型高效催化剂和氢调法,在聚合过程中控制聚合物的熔体指数、分子量分布、颗粒度、熔点等指标,不经粉碎分级,一次性生产出符合要求的热熔胶粉末。     

L型热熔胶的研制

研制的SG010-C和SG010-X型催化剂对氢气敏感性好,可用于乙烯均(共)聚制L型热熔胶。在聚合过程中,通过改变催化剂的结构和氢调,控制聚合物的熔体指数、相对分子质量分布、颗粒度、熔点等,可一步生产出热熔胶粉末,不经粉碎分级。     

L型热熔胶的研制

研制的SG010-C和SG010-X型催化剂,对氢气敏感性好,用于乙烯均(共)聚制L型热熔胶。在聚合过程中,通过改变催化剂的结构和氢调,控制聚合物的熔体指数、分子量分布、颗粒度、熔点等。可一步生产出热熔胶粉末,不经粉碎分级。     

高密度聚乙烯热熔胶的一步法制备

研制的SG010－C和SG010－X型催化剂,对氢气敏感性好,用于乙烯均（共）聚制L型热熔胶。在聚合过程中,通过改变催化剂的结构和氢调,控制聚合物的熔体、分子量分布、颗粒度、熔点等,可不经粉碎分级一步生产出热熔胶粉末。     

L型热熔胶的研制

研制的SG010-C和SG010-X型催化剂对H2敏感性好,可用于乙烯均(共)聚制备L型热熔胶。在聚合过程中,通过改变催化剂的结构和氢调,控制聚合物的熔体指数(MI)、相对分子质量分布、颗粒度和熔点等,可一步法生产出热熔胶粉末且不必进行粉碎分级。     

L型热熔胶的研制

研制的SG010－C和SG010－X型催化剂，对氢气敏感性好，用于乙烯均（共）聚制L型热熔胶，在聚合过程中，通过改变催化剂的结构和氢调，控制聚合物的熔体指数、分子量分布、颗粒度、熔点等。可进一步生产出热熔胶粉末，不必粉碎分级。     

玻璃珠抛光新型热熔胶的制备

利用丙烯酸丁酯与苯乙烯共聚物为主要原料制得玻璃珠抛光用的新型热熔胶,同时研究了部分助剂、填充剂、溶剂等对热熔胶性能的影响,从而优化得到了一种新型热熔胶的生产工艺过程。通过实验研究表明,该热熔胶克服了聚丙烯酸树脂热熔胶在应用过程中存在的诸多问题,而且易于清洗,可在较高温度下以粉末状态存放,不结块、不易碳化,完全适用于玻璃珠抛光热熔胶所需的高温操作工艺。     

非化学固化中空玻璃单道热熔密封胶研究进展

回顾了中空玻璃密封胶的发展历史,归纳分析了中空玻璃用非化学固化单道密封热熔胶的技术特点、发展状况和发展前景,指出含有氢化苯乙烯嵌段共聚物改性丁基橡胶的热熔胶是中空玻璃单道密封非化学固化热熔胶的发展方向。     

化学固化中空玻璃单道热熔密封胶研究进展

回顾了中空玻璃密封胶的发展历史,归纳分析了中空玻璃用化学固化单道密封热熔胶的技术特点、发展状况和发展前景,指出含有聚烯烃热塑性树脂的有机硅改性聚氨酯胶是中空玻璃单道密封化学固化热熔胶的发展方向。     

PES热熔胶浆的研制

由PES热熔胶粉配成的热熔胶浆 ,且有良好的工艺特性 ,透用于粘合衬布的生产     

服装用聚酰胺热熔胶的后加工

具体介绍了服装粘合衬布用聚酰胺热熔胶的后加工，后加工处理可以使热熔胶获得适宜的粉体性能，是使热熔胶具备必需的应用性能的重要加工程序。     

Maleic anhydride grafted polyethylene powder coated with epoxy resin: A novel reactive hot melt adhesive

A novel reactive hot melt adhesive was prepared by coating an epoxy resin on maleic anhydride grafted polyethylene (MAPE) powder. This adhesive had markedly improved adhesion power compared with pristine MAPE powder, which is normally used as a hot melt adhesive. The generation of an ester linkage by the reaction between the anhydride group of MAPE and the hydroxyl group of epoxy resin, during the bonding operation at 190°C with the pressure of 22 MPa for 30 min, was confirmed from the FTIR spectra. The bond strength was further improved by a small amount of 1‐methylimidazole, which accelerated the esterification reaction. When the epoxy resin was coated on hydrated MAPE, in which the anhydride group of MAPE was converted into carboxylic acid group by the reaction with water, the esterification reaction was much faster than that of pristine MAPE, and consequently, the bond strength of the adhesive was much higher than that of pristine MAPE coated with epoxy resin. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Structure and adhesion properties of linear low‐density polyethylene powders grafted with acrylic acid via ultraviolet light

The structure and adhesion properties of linear low‐density polyethylene (LLDPE) powder grafted with acrylic acid (AA) via ultraviolet light (UV) were studied by Fourier transform infrared spectroscopy (FTIR), electron spectroscopy for chemical analysis (ESCA), scanning electron microscopy (SEM), and water contact angle, peel strength, and graft degree measurements. The results show that the chemically inert LLDPE powder can be graft‐copolymerized with AA via this photografting method. The graft degree increases with the ultraviolet irradiation time. The hydrophilicity of the grafted LLDPE powder and the peel strength of high‐density polyethylene (HDPE)/steel joint with the grafted LLDPE powder used as hot‐melt adhesive are improved considerably, as compared to that with the ungrafted LLDPE powder. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2549–2553, 2006     

Structure and adhesion properties of acrylic acid grafted high‐density polyethylene powders synthesized by a novel photografting method

A novel photografting, nonvapor, and nonliquid phase living graft polymerization was developed to functionalize high‐density polyethylene (HDPE) powder. The structure and adhesion properties of HDPE powder grafted with acrylic acid (AA) were studied by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), water contact angle, peel strength, and graft degree measurements. The result shows that HDPE powder can be grafted with AA via the method with a short reaction time and a high monomer conversion. The graft degree increases with the reaction time. Then, the hydrophilicity of the grafted HDPE powder increases also. The peel strength of HPDE/steel joint improved significantly when acrylic acid grafted HPDE powder was used as hot melt adhesive in place of ungrafted HDPE powder. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

聚酯热熔胶的共混改性研究

研究了EVA、聚苯乙烯、增粘树脂等对聚酯热熔胶的共混改性，考查了渗加剂的加入对聚酯热熔胶性能的影响，并研制出改性的聚酯热熔胶。该热熔胶在保证粘接性能的前提下，降低了体系的黏度和成本。     

热熔型纸塑复合预涂膜的研制

以EVA弹性体为主体材料,配以适宜的增粘树脂及其他助剂,制成热熔胶粘剂并涂于BOPP或聚酯膜上,用于纸塑复合。讨论了各种基料对热熔胶软化点、熔融粘度的影响。该预涂膜性能优良,无毒无污染,复合工艺简单,可提高生产效率。     

聚乙烯热熔胶增容聚乙烯基木塑复合材料的研究

采用废木粉和高密度聚乙烯制备复合材料,并采用一种聚乙烯热熔胶作为相容剂以增进憎水性的聚乙烯基材和亲水性的木粉界面的相互作用。评价了该热熔胶的增容效果,并对其增容机理进行了详细论述。研究结果表明:该热熔胶的主要成分为马来酸酐接枝高密度聚乙烯(PE-HDg-MAH)和乙烯-醋酸乙烯酯共聚物(EVA);添加木粉有利于弯曲强度和弯曲模量的提高,但使冲击强度和拉伸强度迅速下降;该热熔胶可明显提高复合材料的力学性能,并且木粉的填充量越高,则增容作用就越明显;当木粉的用量为50％时,使用该热熔胶可使复合材料的拉伸强度、弯曲强度、弯曲模量和冲击强度分别提高115．6％、66．7％、38．1％和67％;基于这些结果可知,该热熔胶可显著提高聚乙烯基材／木粉界面处的亲和力,是聚乙烯基木塑复合材料理想的增容剂。     

聚氨酯热熔胶合成及应用研究的进展

综述了我国聚氨酯热熔胶的最新研究现状,重点介绍了光/湿双固化聚氨酯热熔胶、反应型聚氨酯热熔胶合成及应用研究的进展,最后指出了我国聚氨酯热熔胶的发展方向。     

TGIC副产物在热熔胶黏剂中的应用

添加了抗氧化剂的TGIC副产物经蒸馏,得到较纯净的副产物,并将其与热熔胶黏剂按一定比例混合,得到一种复合胶黏剂.分析了副产物与热熔胶黏剂的配比对持黏性、T—剥离强度、180°剥离强度、软化点、熔融黏度的影响.当TGIC副产物与热熔胶黏剂的配比为2∶8时,所制备胶黏剂的主要力学、理化指标仍能满足家具封边、胶订等领域的行业...