喷射纱生产中毛羽的控制

喷射纱是无捻粗纱产品中高附加值的产品,除了线密度、分束率和可燃物含量等指标要求外,毛羽的控制十分重要。对喷射纱生产中的毛羽产生的原因作了系统、详细的分析后得出,毛羽的产生是与原丝张力、浸润剂的润滑性、原丝烘干过程、络纱过程相关。     

烘干过程中玻纤原丝筒色度控制技术研究

概述了色度的定义,简述了玻纤原丝筒在加热过程中水分子和浸润剂的迁移机理,指出了这种迁移机理对色度的影响原因,指出了在生产过程中影响色度的因素。然后通过一系列试验研究探索了拉丝过程中和烘干控制程序对色度的影响。最后认为,色度和可燃物含量成正比关系,可以通过控制半成品的可燃物含量的方式来控制色度;湿纱含水量波动同可燃物含量的波动,与外观色度成正比关系;缩短排水时间,同时缩短烘干时间,可以有效的降低出炉纱的色度;排水段时间不能过长或者过短,过长过短都会造成烘干出炉纱色度值高。     

玻璃纤维纺织型浸润剂烘干工艺研究

研究了玻璃纤维纺织型浸润剂的烘干工艺。试验了原丝不同自然存放条件、热风烘干的温度与时间等烘干工艺对玻璃纤维原丝含水率、可燃物含量、强度、浸润剂成膜效果与迁移分布,以及退并合股纱的纺织工艺情况和强度与耐磨性能等理化指标的影响。     

单元式烘干窑电热系统一点三控的技术措施

烘干窑在某些工业企业的生产过程中起着非常关键的作用。以玻纤行业的无捻粗纱烘干窑为例:无捻粗纱生产线的烘干工序是将拉制成形的原丝按工艺要求进行烘干,去除原丝中的水分并使浸润剂成膜,以保护原丝在并纱及使用过程中不被磨损。     

玻璃纤维原丝烘干

玻纤原丝筒的烘干过程是加热→气化→迁移→气化过程.影响纤维烘干速度的因素有烘干温度,加热介质的流动速度,烘干空间的相对湿度、原丝简的厚度及其在烘房内的排列位置.纤维烘干的均匀度主要由烘房的结构决定.电、蒸汽、天然气、煤汽均可以作为原丝烘干的能源,各有利弊.烘干温度及烘干工艺应根据纤维用途不同而不同.此外,原丝筒烘干用小车的设计对烘干成品率有很大的影响.     

硅烷偶联剂对玻璃纤维生产工艺及力学性能的影响

研究了A-1100和A-187两种硅烷偶联剂对玻璃纤维拉丝成型工艺、络纱工艺、原丝硬挺度与玻璃纤维及其复合材料界面性能的不同影响。结果显示:A-1100浸润剂体系更有利于玻璃纤维的拉丝成形,拉伸强度更高;相比之下A-187生产的玻璃纤维原丝更加柔软,具有更优的加工性能,粗纱毛羽极少;此外,在环氧树脂-酸酐体系中,涂覆含A-187浸润剂的纤维复合材料具有更高的界面剪切强度和湿态强度保留率。     

影响原丝可燃物含量的因素

从浸润剂体系和拉丝工艺控制两方面分析了影响原丝可燃物含量的因素。浸润剂体系主要从浸润剂配方及可燃物含量设计、浸润剂配制及使用工艺、浸润剂迁移等方面分析;拉丝工艺控制主要从温度、涂油器转速、漏板流量、浸润剂固含量等方面分析。通过控制点分析,提高对控制点的认识以保证控制原丝的可燃物含量,最终提高成品质量的稳定性。     

采用单丝涂油器变频技术提高玻璃纤维原丝可燃物含量的稳定性

提供了单丝涂油器没有使用变频技术时,整个原丝筒可燃物含量的变化数据,分析了产生原丝可燃物含量变化明显的原因。采用单丝涂油器变频技术对原丝筒可燃物含量的稳定性加以控制后,整个原丝筒的该项性能得到了较大的提高,进而提高了玻璃纤维产品质量的稳定性。     

玻璃纤维增强无捻粗纱张力均匀性控制工艺探讨

本文从分析影响玻纤增强无捻粗纱张力均匀性的原丝含水率、含油率、络纱速度、操作方法等因素入手，理论和实践相结合，从工艺上提出了有效控制粗纱张力均匀性的方法。     

单元式玻璃纤维原丝烘干窑的设计与制造

文章介绍了秦皇岛玻纤总厂自行设计并制造的无捻粗纱原丝烘干窑的结构设计及使用效果,通过近两年的实地运行考察和测算,该烘干窑具有使用灵活、结构简单、操作方便、功耗小等特点。各项技术经济指标均达到或超过设计要求。特别适用于粗纱系列产品的小批量、多品种生产型采用。     

玻璃纤维烘干控制要点

在基于对玻璃纤维烘干机理探讨上,通过不同的对比试验对玻璃纤维烘干控制要点进行了研究,为玻璃纤维烘干控制提供了依据。     

Characterization and Process Optimization of Microwave Drying of Plaster of Paris

The changes in the characteristics of plaster of Paris (pop) during drying operation under microwave irradiation conditions, namely surface morphology, effective moisture diffusivity, and absorption of microwave, were studied. The drying characteristics and kinetics of the process during microwave drying of plaster were studied for rectangular-faced cuboids (80 × 70 × 15, L × B × H in mm) through various drying parameters like microwave power input, initial moisture content, and drying time. Further, the experimental data on moisture ratio of plaster for different operating conditions were obtained and the optimization of the microwave drying process parameters was performed with response surface methodology (RSM) by considering all the above-said independent variables. Based on the RSM analysis, the optimum values of the process variables were obtained as: initial moisture content (A) 60%; microwave power input (B) 180 W; and drying time (C) 480 S.     

浅析影响原丝烘干的因素

概述湿纱含水对增强型玻璃纤维的重要性,影响原丝烘干的因素。主要介绍干燥过程的几个阶段,相对湿度,固含量及几个工艺参数对原丝烘干的影响,尤其减少原丝含水率可提高产品质量降低能耗,其中,提高固含量,减少原丝含水的影响最为有效。     

黑加仑真空冷冻与微波真空联合干燥工艺研究

以黑加仑为原料,对其进行了真空冷冻与微波真空联合干燥工艺的研究。结果表明：先真空冷冻后微波真空干燥（FDMV）的组合方式是可行的;联合干燥合理工艺参数为：微波功率1．34kW。绝对压力11kPa,转换含水率为20％（wb）;通过试验验证,联合干燥生产的脱水黑加仑的感官品质和营养成分接近真空冷冻干燥,联合干燥方式对节省干燥时间和降低能耗是有效的。     

Optimization of Parameters for Microwave-Assisted Foam Mat Drying of Blackcurrant Pulp

Both analysis and optimization of parameters of microwave-assisted foam mat drying (MAFM), viz. microwave power, pulp load, drying time, and pulp thickness, for the dehydration process of blackcurrant pulp were performed in a household microwave oven. During MAFM drying, microwave power, pulp load, and drying time have positive effects on both vitamin C and anthocyanin content of blackcurrant pulp up to a certain level then a negative trend is observed. The increase of microwave power and decrease of pulp load accelerate the dehydration of blackcurrant pulp. The pulp thickness has a significant positive effect on both vitamin C and anthocyanin content of blackcurrant pulp. The optimum parameters valid for MAFM drying of blackcurrant pulp are as follows: microwave power of 560 W, pulp load of 65 g, drying time of 8 min, and pulp thickness of 4.46 mm. MAFM drying is a potential method for dehydrating blackcurrant pulp.     

Microwave Drying of Wood Strands

Characteristics of microwave drying of wood strands with different initial moisture contents and geometries were investigated using a commercial small microwave oven under different power inputs. Temperature and moisture changes along with the drying efficiency were examined at different drying scenarios. Extractives were analyzed using gas chromatography/mass spectrometry (GC/MS). The results showed that the microwave drying process consisted of three distinct periods (warm-up period, evaporation period, and heating-up period) during which the temperature, moisture change, and drying efficiency could vary. Most of the extractives were remnant during microwave drying. It was observed that with proper selections of power input, weight of drying material, and drying time, microwave drying could increase the drying rate, save up to 50% of energy consumption, and decrease volatile organic compound (VOC) emissions when compared with the conventional drying method.     

Microwave drying of CuCl residue from hydrometallurgical zinc recovery process

CuCl residue is a hazardous waste from the hydrometallurgical zinc recovery plant. It is very difficult to recycle due to complicated composition, highly corrosive nature, and refractory characteristics. Recently, a new process of microwave drying and roasting was successfully developed to produce both CuO solid and HCl gas products from the CuCl residue. In this paper, the dielectric property of the CuCl residue was measured under different moisture contents. The microwave absorption characteristics of the CuCl residue improved considerably as its moisture content increased. Laboratory-scale drying tests were conducted to evaluate the kinetics of microwave drying and to optimize the operation parameters. The efficiency of microwave drying was further demonstrated in industrial-scale level by microwave dryer developed in in-house. Finally, the drying mechanism of microwave heating of the sticky material was discussed and several measurements were optimized/implemented to intensify the drying process.     

Microwave Drying of Wood Strands

Abstract

Characteristics of microwave drying of wood strands with different initial moisture contents and geometries were investigated using a commercial small microwave oven under different power inputs. Temperature and moisture changes along with the drying efficiency were examined at different drying scenarios. Extractives were analyzed using gas chromatography/mass spectrometry (GC/MS). The results showed that the microwave drying process consisted of three distinct periods (warm-up period, evaporation period, and heating-up period) during which the temperature, moisture change, and drying efficiency could vary. Most of the extractives were remnant during microwave drying. It was observed that with proper selections of power input, weight of drying material, and drying time, microwave drying could increase the drying rate, save up to 50% of energy consumption, and decrease volatile organic compound (VOC) emissions when compared with the conventional drying method.     

隧道式玻璃纤维烘干炉的设计与应用效果

介绍了原丝烘干工艺对终端产品质量的影响,原丝烘干的3个阶段,隧道式玻璃纤维烘干炉的主要结构和工作原理以及应用效果。详细介绍了热风发生炉、热风循环系统、干燥室、温度自动控制系统、原丝输送装置的结构和原理。     

增强耐水解尼龙66用玻璃纤维短切原丝的开发研究

介绍了应用于耐水解尼龙66的玻璃纤维短切原丝浸润剂的试验研究过程,重点介绍了增强耐水解尼龙66用玻璃纤维短切原丝必须具备的性能,通过试验最终得出了同时满足拉丝工艺、烘干工艺和增强耐水解尼龙66性能的玻璃纤维浸润剂。采用该浸润剂配方生产的玻璃纤维短切原丝产品,不论是玻璃纤维的外观、性能,还是改性后尼龙66的力学性能以及耐水解性能,都能达到预期效果。