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1、第二章纱疵分析与预防第一节:概述纱疵的定义纱疵顾名思义是指纱的疵点,也就是指在纺纱生产过程中所产生的疵点,由原纱产生的疵点,织入布面反映在布面上的统称为布面纱疵。布面纱疵包括影响棉布降等的疵点和不影响降等的疵点。后者有的可以修复,有的不能修复,有时对后加工和成品也会产生不良影响。消除纱疵的重要性:纱疵直接影响棉布的内在质量和外观质量,如:规律性错纬不仅影响棉布外观,而且对棉布的强力也有很大的影响,因此,布面纱疵是评定棉布质量品等的主要依据之一。棉布的分等是由物理指标、棉结杂质与布面疵点(包括纱疵与织疵)相结合进行评定的
2、。布面疵点的多少直接影响棉布的下机一等品率和入库一等品率两项质量指标。有些纱疵虽然评分不会使棉布降等,但也影响棉布的外观,需要在验布中作出标识,进行修织。这不但要花费大量的人力和物力,而且修织后常会造成内在质量的不良,影响棉布的使用效果。纱疵、织疵多,是当前棉布质量主要问题之一,是影响棉布出口竞争能力的关键。棉布走向国际市场,必须大力降低纱疵。纱疵的分类按出现的规律分随机产生的、零星出现的随机性纱疵,大多数无明显规律。international,Unicominternationalmarket,adaptedfutu
3、repeopleoncityofdevelopmentneeds,basedYuindustrysupport,andtrafficadvantage,andYangtzeRiverculture,andecologicalcivilization,advantage,establishedcitydevelopmenttarget:radiationabsorbYangtzeRiverupstreamchuanYunnanGuizhouofregionalcenter,andinternationalecologic
4、allandscapeculturecity.2.3.2economicdevelopmentinYibincity,goal2020GDPreached300billionyuan,thepercapitaGDPreached580002030regionalGDPreached800billionyuan,thepercapitaGDPreached138000.2020industrialstructureadjustmentinYibincityas9:56:35;2030industrialstructure
5、adjustmentforthe6:47:47.Industrialoutputby2020of510billionyuanin2030andreach1.2trillionyuan.2.4oftheurbanpopulationandlandsize2.4.1Yibincity,populationsizeaccordingtothedifferentforecastingmethodsandthesizeofpopulationenvironmentalcapacitycheck,thedowntownmainfu
6、turepopulationprojectionsfortheyearareasfollows:downtownmainfuturepopulationprojectionsfortheyear(unit:million)forecastmethods,2020,2030,balancingmethodfor130-150table2.4-1170-190ultrahighspeeddevelopmentofrelationshipbetweeneconomicandlabourlawdevelopmentof1502
7、10140180Generaldevelop1301.7millionpeople,resourcesandenvironmentcapacitychecklandpopulationcarryingcapacity--280waterresourcesandpopulationcapacity-doesnotconstituteabindingcomprehensivepredictionofecologicalresourcescoupled--310resultsof140-180in2020,theactual
8、residentpopulationofabout1.4millionpeople;2030theactualresidentpopulationofabout1.8millionpeople.2.4.2theuseofscale,Yibincity2030percapitaindexofurbanconstructionland