乐享彩票

防静电环氧地坪漆的水性化设想与涂装

2016-07-09  来(lai)自: 乐享彩票铭达地坪装潢工程无限公司 阅读次数:1455

在(zai)范(fan)畴里(li),地(di)坪漆所占的(de)(de)比重呈回升趋向;在(zai)地(di)坪资料规模中(zhong),地(di)坪漆的(de)(de)产值也是排在(zai)前线的(de)(de)。而观全部地(di)坪漆的(de)(de)市场,七成(cheng)是环氧型(xing)的(de)(de)。这类上(shang)风位置(zhi)的(de)(de)组成(cheng),决(jue)不(bu)是偶(ou)尔命(ming)运培养的(de)(de)。空中(zhong)涂料须要(yao)具备的(de)(de)与水泥类基材粘结力好(hao)(hao)、耐磨性(xing)好(hao)(hao)、耐水性(xing)好(hao)(hao)、耐化学介质才能好(hao)(hao)几大特(te)点,恰好(hao)(hao)是双组分环氧的(de)(de)刚强。

    应当看(kan)到,国(guo)际的(de)环氧地坪(ping)漆绝大(da)局部(bu)仍是(shi)溶剂(ji)型和局部(bu)无溶剂(ji)型。前者大(da)批VOC自不待言(yan),后者的(de)活性(xing)(xing)浓缩剂(ji)毒性(xing)(xing)不可藐视。存在这是(shi)当下的(de)现实,却并(bing)非永久。情势日趋严重化,东部(bu)地域的(de)雾(wu)霾不时给国(guo)人拉响警报(bao)。修建(jian)涂料(liao)范(fan)畴的(de)水性(xing)(xing)化是(shi)首当其冲的(de),能(neng)水性(xing)(xing)化的(de)应尽能(neng)够地水性(xing)(xing)化。

    从机能和(he)涂装比拟(ni),溶剂型(xing)环氧地坪漆会有鼓泡(pao)、零落的几率偏向,施工时有毒物会有净化(hua),且易燃易爆(bao);水性环氧地坪漆对干湿(shi)面附出力均佳(jia),有单向透气性,操(cao)纵东西可洗濯,节俭了(le)东西本钱(qian),也掩护了(le)现场(chang)功课者.

    水性(xing)抗(kang)静电(dian)(dian)环氧地坪漆是功效(xiao)性(xing)涂料,它的(de)设(she)想理念(nian)是既要具备水性(xing)环氧的(de)闪光(guang)点,又能(neng)(neng)够取得疾速开释掉(diao)静电(dian)(dian)电(dian)(dian)荷(he)的(de)才能(neng)(neng),并确保此才能(neng)(neng)的(de)耐(nai)久。静电(dian)(dian)的(de)不期而至(zhi),会带(dai)来相(xiang)称多的(de)费事。比方发生电(dian)(dian)磁波搅扰主动仪表,电(dian)(dian)荷(he)使(shi)车间(jian)产物带(dai)尘倒霉于(yu)精加(jia)工等等。尝试(shi)室、加(jia)工车间(jian)、仓储(chu)局部等场所都很(hen)是须要这(zhei)类(lei)涂料。

  1·抗静电环氧地坪漆的水性化设想

    1.1水性(xing)环(huan)氧的系统

    西欧(ou)自20世纪70年月业(ye)已动(dong)手水性(xing)(xing)环氧(yang)的研发任务,出格是(shi)欧(ou)洲很正视水性(xing)(xing)产物,投入力(li)度颇大。时下(xia)双组分(fen)室温固(gu)化水性(xing)(xing)环氧(yang)系(xi)统罕见有四类(lei):

    第(di)1类(lei)低绝(jue)对份子品质的液态(tai)环氧树脂+水(shui)性(xing)环氧固化剂

    环氧树(shu)脂不先行乳化(hua),而(er)是施工前与固(gu)化(hua)剂(ji)夹(jia)杂用固(gu)化(hua)剂(ji)乳化(hua)。这里的水性(xing)环氧固(gu)化(hua)剂(ji)有两重感化(hua)。涂(tu)膜硬度(du)增加(jia)较快。

    第2类高绝对份子品质(zhi)的固体环氧(yang)树(shu)脂(zhi)分(fen)离体+水性(xing)环氧(yang)固化剂

    高绝(jue)对(dui)(dui)份(fen)子(zi)(zi)品(pin)质的环(huan)氧树脂反映(ying)活(huo)性(xing)小于低绝(jue)对(dui)(dui)份(fen)子(zi)(zi)品(pin)质环(huan)氧树脂,以是合用期(qi)大于第1类。空化的“AncarezAr550”为(wei)其(qi)代表。

    第3类低(di)绝对(dui)份子品质的液(ye)态环(huan)氧树(shu)脂乳液(ye)+水(shui)性环(huan)氧固(gu)化剂

    环(huan)氧树脂乳(ru)化剂(ji)有亲水的外表活(huo)性链(lian)段,又有亲油的环(huan)氧树脂链(lian)段,可用来乳(ru)化环(huan)氧树脂。

    第4类(lei)水性环氧树脂乳液+聚氨(an)酯改性环氧固化剂

    聚氨酯改性(xing)环氧(yang)固(gu)化(hua)剂转变了以往环氧(yang)固(gu)化(hua)剂的范(fan)围性(xing),用来固(gu)化(hua)水性(xing)环氧(yang)树脂乳液获得的涂料综合机(ji)能杰出。

双(shuang)组分水性环氧夹(jia)杂(za)涂层固化进程以(yi)下:

    水份蒸(zheng)发(fa)→粒子(zi)聚结→固化(hua)剂分离→固化(hua)反映(ying)

    这四个(ge)进程既有前后,又不朋分(fen)(fen)开。起首(shou)是涂膜里的水份延(yan)续蒸(zheng)发,如许聚合物粒(li)子(zi)延(yan)续靠近(jin)组成(cheng)慎密聚积,从(cong)而粒(li)子(zi)起头聚结(jie)。在此阶段,固(gu)化(hua)剂份子(zi)得以分(fen)(fen)离渗透聚合物粒(li)子(zi)。固(gu)化(hua)剂中(zhong)胺基与环氧树脂中(zhong)的环氧基反映(ying),全部(bu)系统逐步(bu)(bu)组成(cheng)均(jun)相完整的涂膜。要(yao)(yao)注重当局部(bu)反映(ying)后粒(li)子(zi)外表会(hui)致使一层硬壳,这会(hui)障(zhang)碍固(gu)化(hua)剂进一步(bu)(bu)的分(fen)(fen)离和进一步(bu)(bu)的固(gu)化(hua),要(yao)(yao)调和好聚结(jie)、分(fen)(fen)离、固(gu)化(hua)进程。

    1.2抗静电的机理

    电(dian)(dian)(dian)(dian)阻(zu)率(lv)(lv)小于(yu)1Ω.cm的(de)(de)(de)(de)物体(ti)为导(dao)体(ti),电(dian)(dian)(dian)(dian)阻(zu)率(lv)(lv)大于(yu)109Ω.cm向绝缘体(ti)过(guo)(guo)渡。电(dian)(dian)(dian)(dian)阻(zu)率(lv)(lv)在105-109Ω.cm时,物体(ti)具备抗(kang)静(jing)电(dian)(dian)(dian)(dian)才能。导(dao)电(dian)(dian)(dian)(dian)介质平均散布于(yu)涂(tu)(tu)膜(mo),节制了涂(tu)(tu)膜(mo)的(de)(de)(de)(de)电(dian)(dian)(dian)(dian)阻(zu)率(lv)(lv)。当电(dian)(dian)(dian)(dian)荷进入会立即指导(dao)至(zhi)相连的(de)(de)(de)(de)接(jie)地或别(bie)的(de)(de)(de)(de)低电(dian)(dian)(dian)(dian)位泄去。抗(kang)静(jing)电(dian)(dian)(dian)(dian)是一(yi)(yi)种(zhong)合用功效,经由过(guo)(guo)程(cheng)涂(tu)(tu)层(ceng)(ceng)间的(de)(de)(de)(de)配(pei)合阐扬出感(gan)化(hua),普通为底涂(tu)(tu)、中(zhong)(zhong)涂(tu)(tu)、腻子、面漆,底中(zhong)(zhong)之间有导(dao)电(dian)(dian)(dian)(dian)铜(tong)网。固然也能够(gou)和别(bie)的(de)(de)(de)(de)功效性(xing)涂(tu)(tu)层(ceng)(ceng)相叠加成系统,大师以模块(kuai)化(hua)的(de)(de)(de)(de)体(ti)例配(pei)合发力。且(qie)模块(kuai)之间应是可挑(tiao)选可装配(pei)的(de)(de)(de)(de),如蓄光层(ceng)(ceng)、抗(kang)菌层(ceng)(ceng)等。要充实(shi)阐扬出抗(kang)静(jing)电(dian)(dian)(dian)(dian)的(de)(de)(de)(de)感(gan)化(hua),一(yi)(yi)个完整(zheng)的(de)(de)(de)(de)涂(tu)(tu)料(liao)配(pei)套系统是须要的(de)(de)(de)(de)。

    现有的导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)介质有导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)助(zhu)剂、导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)纤(xian)维(wei)、导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)金属(shu)(shu)粉末、导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)金属(shu)(shu)氧(yang)化物(wu)、导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)聚合物(wu)、碳系导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)物(wu)等(deng)。导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)助(zhu)剂如季铵盐类外表(biao)活性剂,分(fen)离(li)平均,易(yi)迁徙散失。导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)纤(xian)维(wei)导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)性好(hao),加量少,分(fen)离(li)性不佳(jia)(jia)。导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)金属(shu)(shu)粉末导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)性好(hao),有色(se)彩,分(fen)离(li)性不佳(jia)(jia),易(yi)氧(yang)化。导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)金属(shu)(shu)氧(yang)化物(wu)导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)性好(hao),加量大,电(dian)(dian)(dian)(dian)(dian)阻率(lv)节(jie)制好(hao)。导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)聚合物(wu)如搀杂(za)聚苯胺,导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)性好(hao),耐。碳系导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)物(wu)如石墨和炭黑,导(dao)(dao)电(dian)(dian)(dian)(dian)(dian)性好(hao),色(se)彩深。

    1.3环氧树脂的水性化

    国(guo)际外环(huan)(huan)氧树脂(zhi)的(de)水性(xing)化(hua)首要是乳(ru)化(hua)法和成盐法。前(qian)者指(zhi)树脂(zhi)的(de)间接(jie)乳(ru)化(hua)、自乳(ru)化(hua)或(huo)(huo)水性(xing)环(huan)(huan)氧固(gu)化(hua)剂乳(ru)化(hua)。前(qian)面讲到水性(xing)环(huan)(huan)氧系(xi)(xi)统(tong)(tong)时已有触及(ji)。后者指(zhi)树脂(zhi)引入羧基、胺基等,再别(bie)离用(yong)绝对(dui)份子品质小的(de)碱或(huo)(huo)酸中和成盐。现实上(shang),对(dui)水性(xing)环(huan)(huan)氧地坪漆,支流上(shang)用(yong)乳(ru)化(hua)法制备;而响应水性(xing)环(huan)(huan)氧系(xi)(xi)统(tong)(tong)以第(di)(di)1类(lei)最成熟,从本钱(qian)、机能婚(hun)配(pei)上(shang)操(cao)纵性(xing)。以是前(qian)面配(pei)方(fang)阐述中也(ye)接(jie)纳第(di)(di)1类(lei)系(xi)(xi)统(tong)(tong)加以申明。

    1.4固化剂(ji)的水(shui)性化

    地(di)(di)坪漆的枯燥前(qian)提普通为室温天然(ran)枯燥,固(gu)(gu)化(hua)剂必不可(ke)少。水(shui)性环氧的显在固(gu)(gu)化(hua)剂大多接(jie)纳(na)多元(yuan)胺或其改性物,操纵胺基上的活跃(yue)氢与环氧基团交联反(fan)映。经由过(guo)程固(gu)(gu)化(hua)剂可(ke)乳化(hua)树(shu)脂(zhi),也可(ke)不乳化(hua),公道地(di)(di)选(xuan)配使系统(tong)的合用期、固(gu)(gu)化(hua)前(qian)提、涂膜机(ji)能等合适客户请(qing)求。

    多元(yuan)胺(an)有三种水性(xing)化的(de)改性(xing)体例,改机能够(gou)降服普通(tong)胺(an)类固(gu)化剂的(de)缺点:

    第1种多元胺与单脂肪酸反映制备酰胺化的多胺

    这类范例的(de)多(duo)胺有必(bi)然(ran)的(de)水溶性或水可分离性,自身(shen)有必(bi)然(ran)的(de)水可浓缩性。别的(de)有必(bi)然(ran)的(de)外(wai)表活性感化(hua),可乳化(hua)低绝对份(fen)子品质的(de)液态环氧树(shu)脂。表现(xian)幸亏合(he)用期、施工机能够;弊(bi)病在于多(duo)胺与环氧组分的(de)相容(rong)性有题目,固化(hua)反映也不完整。

    第(di)2种多元胺与二聚酸反映(ying)制(zhi)备聚酰胺

    多元胺与(yu)二(er)聚(ju)酸缩合获得的(de)(de)水性(xing)聚(ju)酰胺,一方面(mian)与(yu)环氧(yang)树脂的(de)(de)相容性(xing)进步了,另(ling)外(wai)一方面(mian)用它乳(ru)化环氧(yang)树脂的(de)(de)涂料合用期短,涂膜机器机能差,色(se)彩深(shen)。

    第3种多元胺与环(huan)氧树(shu)脂反(fan)映制(zhi)备(bei)多元胺-环(huan)氧加成物

    多元胺(an)与环氧(yang)树脂加成(cheng)获得的(de)(de)多元胺(an)-环氧(yang)加成(cheng)物,由(you)于(yu)伯胺(an)基团的(de)(de)削减,固化(hua)(hua)剂活性的(de)(de)变小(xiao),使得涂(tu)料合用期(qi)的(de)(de)变长(zhang)。引入氧(yang)化(hua)(hua)烷基链(lian)段等能够使之能乳(ru)化(hua)(hua)环氧(yang)树脂并(bing)晋升了涂(tu)膜品质(zhi)。从结果上看,第三种(zhong)优于(yu)前两(liang)种(zhong)。

1.5配方设想

    1.5.1环氧基(ji)与胺氢当量比(bi)

    环(huan)氧(yang)树脂组(zu)分(fen)与改(gai)性(xing)多元胺固化剂的配比(bi),本色(se)上便是环(huan)氧(yang)基与胺氢当量比(bi)的计较。国际质料(liao)环(huan)氧(yang)树脂组(zu)分(fen)经常利用(yong)环(huan)氧(yang)值(zhi)(zhi)目标(biao),胺类用(yong)胺值(zhi)(zhi)。

    环氧当(dang)量=100/环氧值(zhi)

    胺氢(qing)当量(liang)=56000/胺值

    环(huan)氧基团适量,揭示环(huan)氧的(de)特征(zheng)多一(yi)点,合用(yong)期绝(jue)对耽误了,耐(nai)水、耐(nai)酸、耐(nai)碱增强了,耐(nai)侵(qin)蚀(shi)进步(bu)。

    胺(an)氢适(shi)量,固(gu)化(hua)速率变快了,附(fu)出(chu)力、耐磨性(xing)、耐溶剂、耐污性(xing)均晋升。

    当量比实际测(ce)算(suan)后,应根据(ju)详(xiang)细利用场所及小试机能测(ce)试作浮动(dong),获得一个黄金(jin)比配(pei)。

    1.5.2颜料(liao)的(de)选型

    以胺(an)类为(wei)水性(xing)(xing)(xing)(xing)环氧固化剂时,斟酌到胺(an)类的弱碱性(xing)(xing)(xing)(xing),颜(yan)(yan)料(liao)(liao)不妥操纵酸性(xing)(xing)(xing)(xing)颜(yan)(yan)料(liao)(liao)。颜(yan)(yan)基比要高一点,保障杰(jie)出的透(tou)气性(xing)(xing)(xing)(xing)。着色(se)颜(yan)(yan)料(liao)(liao)挑选耐候性(xing)(xing)(xing)(xing)和耐化学(xue)介质好的无机(ji)(ji)颜(yan)(yan)料(liao)(liao)或其色(se)浆。添(tian)补(bu)颜(yan)(yan)料(liao)(liao)选吸(xi)油量小、机(ji)(ji)能惰性(xing)(xing)(xing)(xing)的。不只是下降本钱,更是起到进步(bu)物理(li)化学(xue)机(ji)(ji)能的感(gan)化,如耐磨性(xing)(xing)(xing)(xing)、粉饰力,对贮(zhu)存也有正感(gan)化。添(tian)补(bu)颜(yan)(yan)料(liao)(liao)过量,对流变、表(biao)观有负感(gan)化。

    导(dao)(dao)电(dian)介质中(zhong)(zhong)仍是导(dao)(dao)电(dian)颜料导(dao)(dao)电(dian)机能好。差别的导(dao)(dao)电(dian)颜料增加量不一样(yang),其对各方面影响有差别。综合比拟,导(dao)(dao)电(dian)金属氧化物和(he)导(dao)(dao)电(dian)聚合物表现上佳,碳系(xi)导(dao)(dao)电(dian)物只用(yong)作中(zhong)(zhong)涂或帮助(zhu)感化。

    1.5.3助剂的(de)选型

    导(dao)电助(zhu)剂:导(dao)电助(zhu)剂多呈(cheng)外表活性(xing),只是早期(qi)抗(kang)静电结(jie)果好。在(zai)一段(duan)时候后(hou)由于不时排泄(xie)致(zhi)使(shi)了(le)抗(kang)静电才能削弱甚(shen)至消逝(shi)。倡(chang)议不要零丁(ding)操纵。

    润(run)湿(shi)(shi)分(fen)(fen)离(li)剂:颜(yan)料若(ruo)是(shi)在环氧树脂(zhi)平分(fen)(fen)离(li),受困于树脂(zhi)粘度,分(fen)(fen)离(li)效力不(bu)(bu)会高。仍(reng)是(shi)在固化剂组分(fen)(fen)插(cha)手得当。若(ruo)是(shi)固化剂含外表(biao)活性(xing)链段(duan),有必然(ran)的(de)润(run)湿(shi)(shi)分(fen)(fen)离(li)才(cai)能(neng),实际上可不(bu)(bu)加分(fen)(fen)离(li)剂。斟酌到导(dao)(dao)电颜(yan)料与(yu)别的(de)成份(fen)的(de)相容性(xing)及(ji)争夺短时候分(fen)(fen)离(li)好(hao)导(dao)(dao)电颜(yan)料,选用(yong)合(he)适(shi)的(de)润(run)湿(shi)(shi)分(fen)(fen)离(li)剂是(shi)须要的(de)。

    消(xiao)泡剂(ji)(ji)(ji):要正视消(xiao)泡剂(ji)(ji)(ji),由于各成份中有的有外表活性感化(hua),轻易组成泡沫;施工会夹带氛围(wei);漆膜致密度不够,有微孔;膜厚影响气泡排挤速率。抑(yi)泡剂(ji)(ji)(ji)和消(xiao)泡剂(ji)(ji)(ji)组合(he)利用会更好。

    润湿(shi)流平(ping)剂:水的(de)外表张力偏(pian)高,对基材润湿(shi)显弱。同时(shi)在无限时(shi)候里(li)涂膜能充(chong)实流平(ping),能够确(que)保(bao)光芒等不(bu)打扣头。润湿(shi)流平(ping)剂的(de)需要(yao)可见一斑。

    成膜(mo)助剂(ji):成膜(mo)助剂(ji)的(de)感化(hua)在(zai)于下降MFFT,调理系统粘(zhan)度,对(dui)表观(guan)等有助益。杰出(chu)的(de)成膜(mo)助剂(ji)应(ying)当合适:

    ①好的水解不(bu)变性

    ②低的固结点

    ③恰当的挥发率

    ④好的固结效力

    ⑤环保范例

    防沉(chen)剂:防沉(chen)剂使导电介质和别的(de)能平均散布在系统中(zhong),一是进(jin)步了(le)贮存(cun)不(bu)变,二是有益于涂(tu)层电阻值的(de)平均性(xing)。

    增稠剂:增稠剂调理固(gu)化剂组(zu)分的(de)粘(zhan)(zhan)度,让两组(zu)分粘(zhan)(zhan)度巨细挨(ai)近,便(bian)于夹(jia)杂(za)操(cao)纵。


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