皇冠体育在线

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皇冠体育在线

热熔胶的生产方法

发布时间:2019-09-27点击量:0

热熔胶的生产方法

 


一,聚酰胺(Polyamide简称PA)胶

皇冠体育在线PAJIAODESHENGCHANYIYOU2ZHONGFANGFA,JINILONGYANFAHELIANJIAOHUANFA"SHENGCHANTONGCHANGSHIZAIGAOYAFANYINGFUZHONGJINXING"PAJIAOYIYOULI!TIAO!MOHUOFENZHUANGCHANPIN"ZHIBEIFENZHUANGCHANPINDEFANGFAYUPESJIAOFENDAZHIXIANGTONG"BUTONGDIANZAIYUPAFENZUIZHONGXIDIYONGSHUI,GANZAOXICHUDECHENDIANJISHUI,PAIFANGERBUHUISHOU。

ER,JUYIXI(PolyethyleneJIANCHENGPE)

TONGCHANGTABUZUOWEIJIAOZHANJISHIYONG"DANSHIDANGYONGTAZHANJIEZHIDICUSONG!DUOKONGCAILIAO(RUBULEI!PIGE!ZHIZHANG!MUCAIDENG)SHI,ZAIRONGRONGZHUANGTAIXIARONGTIPEJIAOJINSHENDAOBEIZHANCAILIAONEIBU,GUHUAHOUYOUYUXINGCHENGLEDING!GOU!MAODENGWULIZUOYONG,YEHUICHANSHENGYIDINGDEZHANJIELI"LINGWAI,JUYIXICHENGBENDI,SUOYIYEKEZUOWEIRERONGJIAOSHIYONG"PEYOU2ZHONGLEIXING:DIMIDUJUYIXI(LDPE)HEGAOMIDUJUYIXI(HDPE)"PEDESHENGCHANTONGCHANGSHIZAISHIYOUHUAGONGLIANHEQIYEZHONGJINXING,XUANZESHIYIDEPAIHAOZUOWEIRERONGJIAOSHIYONG"XUANQUDEYIJUSHIRONGTIZHISHU(MI),TASHIZHIZAIGUIDINGWENDUHEYALIXIA,TONGGUORONGTIZHISHUYIKOUMO10minNEILIUCHUJUYIXIDEKESHU"DANGMIZAI10~50g#(10min)-1ZHIJIANCAISHIYIZUOWEIRERONGJIAOSHIYONG"FENZHUANGPEDESHENGCHANSHIZAIYISHUIWEIZHILENGJIEZHIQINGKUANGXIA,YOUZHILENGXITONGCHULAIDELENGDONGSHUIJIANGFENSUISHEBEILENGQUEDAO5eZUOYOU,JINENGFENSUICHU40~120MUDEJIAOFEN,SHAIFENHOUBAOZHUANG"

SAN,YIXI-CUSUANYIXIGONGJUWU(Ethylene-Vinyl Acetate CopolymerJIANCHENGEVA)

皇冠体育在线TASHIYIXIHECUSUANYIXIDEWUGUIGONGJUWU"YOUYUYIXILIANDUANDEJIARU,LADALECUSUANYIXILIANDUANJIANDEJULI,QIDAOLENEIZENGSUDEZUOYONG,SUOYIEVADEXINGNENGZAIMOUXIEFANGMIANYOUYUJUCUSUANYIXI"EVADESHENGCHANFANGFAYOUGAOYA(100~250MPa)BENTIJUHEFAHEDIYA(35MPaZUOYOU)RONGYEJUHEFA"TONGCHANGZUOWEIRERONGJIAOSHIYONGDEEVASHICAIYONGBENTIJUHEFASHENGCHANDE"SHUZHIZHONGCUSUANYIXIHANLIANGZAI18%~33%ZHIJIAN,RONGTIZHISHUZAI15~400ZHIJIAN"GAILEIRERONGJIAODESHENGCHANFANGFAYOU:LIANXU(JICHUJI)FAHEJIANXIE(FUSHI)FA"

皇冠体育在线SI,JUANZHI(PolyurethaneJIANCHENGPU)[5]

在该类胶粘剂中,含有极性很强的!化学性质活泼的氨酯基(NHCOO)和异氰酸酯基(NCO),能与被粘材料间产生氢键,使分子间力增强,粘接得更加牢固"因此可以说聚氨酯是热熔胶中的后起之秀,今后将会得到快速地发展"PU的生产亦有:连续(挤出机)法和间歇(釜式)法2种"基本上相似于EVA热熔胶的生产"以釜式法为例简述如下:将聚酯(聚己二酸乙二醇,分子质量在2000左右)和1,4-丁二醇加入釜中,在120e下真空(1330Pa)脱水2h左右,快速加入已预热100~110e的MDI(二苯甲烷二异氰酸酯)中"在搅拌下升温至160e左右,维持0.5~1.0h,待物料变稠,可拉成丝状时停止反应,降温出料即得产品"3种原料的摩尔配比为:n(聚酯)Bn(丁二醇)Bn(MDI)=1B2B3"

五,热熔压敏胶(Hot Melt Press Sensitive Adhesive简称HMPSA)[6]

它在制造和使用时,均不使用任何溶剂(亦包括水),只需加热至物料熔点以上就可进行胶粘剂及其制品的生产"因此,该胶粘剂排除了溶剂的公害问题,可实施高速生产"HMPSA有2大类:一类是以高醋酸乙烯酯(VA)含量(质量分数40~60%)的EVA树脂为基础聚合物,再加入增粘剂及抗氧剂等配制而成;而另一类则是以热塑性弹性体SBS或SIS为基础聚合物,再加入其他原料配制而成"EVA系列压敏胶皇冠体育在线主要用于胶纸带的生产,而SBS或SIS系列压敏胶主要用于一次性卫生用品的生产"热熔压敏胶的生产与热熔胶的生产相似,现以SBS系列卫生用品的生产为例,示意如图1"

LIU,RONGJIXINGRERONGJIAO(Solvent Hot Melt AdhesiveJIANCHENGSHMA)

皇冠体育在线YOUXUDUOCHANPINXUYAOSHIYONGRERONGJIAO,DANBUNENGZHIJIESHIYONGXIANYOUDELIZHUANGHUOFENZHUANGCHANPINYETAIRERONGJIAOJINXINGTUBU"DAIRONGJIHUIFAHOU,LIYONGLIUYUJICAISHANGBOERJUNYUNDEJIAOMO,ZAIREYAXIASHISHIZHANJIE"RUFANGWEIBIAOZHI,YEJINGXIANSHIQIMIFENG,RERONGZHUANYINTUAN,SHUHUABIAOHUDENGFANGMIANDOUXUYAOSHMA"TADEZHIBEIGUANJIANJISHUSHIXUANZEHESHIDERONGJI,YINWEIMUQIANYIGONGYEHUASHENGCHANDEPA!PES!EVADENGRERONGJIAOZAITONGYONGRONGJIZHONGJUNBUYIRONGJIE,YOUDEJISHIZAIJIARESHIKEYIRONGJIE,DANLENGZHISHIWENSHIZECHENGNINGJIAOZHUANG,NANYIZHIDETOUMING!LIUDONGDEJUNXIANGJIAOYE"YIEVALEIRERONGJIAOWEIRONGZHI,YIJIABEN!QIYOUWEIRONGJI,ZHIBEIDESHMACHANPINKEZAISHIWENXIACHENGJUNXIANG!TOUMING!ZHANCHOUYETI,GUHANLIANG20%~40%。

QI,JUZHI(PolyesterJIANCHENGPES)JIAO

目前,生产聚酯胶的方法有酯交换法和醇解法[2],这2种方法的工艺条件和使用设备基本相同"针对不同用途,可将PES作成条!粒!膜或粉状,且以粉状PES用量最大"制作粉状产品的方法有:深冷粉碎法和/溶胀0粉化法[3]"深冷粉碎法是在深冷粉碎机中进行,先用液氮或液态空气将设备和胶粒冷却到-170~-150e,使PES深度脆化,再通过粉碎机破碎成胶粉"将胶粉加入整形机中,在少量抗静电剂的存在下进行整形处理,使胶粉外形呈石子形,然后按细度要求进行筛分和包装"溶胀粉化是典型的化学制粉方法,其技术关键是溶剂-沉淀剂的选择"对PES粉化选用甲苯-乙醇为溶剂-沉淀剂体系"生产过程是:在粉化釜中先加入溶剂含量较高的粉化液(初次开车需要新配制,在连续生产中则使用回收过滤的母液配制),在搅拌下逐渐加入粒状PES,加热回流,至PES全溶"在降温中逐渐加入沉淀剂含量较高的沉析液,釜内物料渐呈凝胶状,在强烈搅拌下破碎成粉状"再经冷却!甩干!洗涤!干燥后整形!筛分!包装即为成品"成品胶粉外形呈土豆状。

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