
2025-11-17 13:14:21
玻纖(xian)(xian)樹(shu)(shu)脂(zhi)(zhi)(zhi)復(fu)合(he)材(cai)(cai)料(liao)(liao)(liao)的(de)(de)(de)性(xing)能(neng)(neng)(neng)(neng)(neng)躍(yue)升(sheng)密(mi)(mi)碼。!在(zai)(zai)材(cai)(cai)料(liao)(liao)(liao)科(ke)學領域(yu),玻纖(xian)(xian)樹(shu)(shu)脂(zhi)(zhi)(zhi)復(fu)合(he)材(cai)(cai)料(liao)(liao)(liao)憑借(jie)其(qi)強(qiang)度(du)高、輕量(liang)化(hua)等優勢(shi),在(zai)(zai)航(hang)(hang)空(kong)航(hang)(hang)天(tian)、汽(qi)車制(zhi)造(zao)、建筑等眾多行(xing)(xing)(xing)業中(zhong)占據重(zhong)要(yao)地(di)位。而南京能(neng)(neng)(neng)(neng)(neng)德新材(cai)(cai)料(liao)(liao)(liao)技術有(you)限公司(si)的(de)(de)(de)偶(ou)(ou)聯(lian)劑(ji)(ji)(ji),堪稱(cheng)是推動(dong)玻纖(xian)(xian)樹(shu)(shu)脂(zhi)(zhi)(zhi)復(fu)合(he)材(cai)(cai)料(liao)(liao)(liao)性(xing)能(neng)(neng)(neng)(neng)(neng)躍(yue)升(sheng)的(de)(de)(de)關鍵密(mi)(mi)碼。 能(neng)(neng)(neng)(neng)(neng)德偶(ou)(ou)聯(lian)劑(ji)(ji)(ji)獨(du)特的(de)(de)(de)分(fen)子(zi)結(jie)構使(shi)其(qi)成為玻纖(xian)(xian)與(yu)樹(shu)(shu)脂(zhi)(zhi)(zhi)之(zhi)間的(de)(de)(de)理想 “橋梁”。在(zai)(zai)復(fu)合(he)材(cai)(cai)料(liao)(liao)(liao)的(de)(de)(de)制(zhi)備過程中(zhong),它一(yi)端(duan)緊緊抓住玻纖(xian)(xian)表面,另一(yi)端(duan)與(yu)樹(shu)(shu)脂(zhi)(zhi)(zhi)分(fen)子(zi)緊密(mi)(mi)結(jie)合(he)。這一(yi)巧(qiao)妙的(de)(de)(de)結(jie)合(he)極(ji)大(da)地(di)增強(qiang)了兩者的(de)(de)(de)界(jie)面粘結(jie)力(li),有(you)效改善了應(ying)力(li)傳(chuan)遞。在(zai)(zai)航(hang)(hang)空(kong)航(hang)(hang)天(tian)領域(yu),飛(fei)(fei)行(xing)(xing)(xing)器的(de)(de)(de)結(jie)構部(bu)(bu)件(jian)(jian)對材(cai)(cai)料(liao)(liao)(liao)的(de)(de)(de)強(qiang)度(du)和穩定(ding)性(xing)要(yao)求極(ji)高,使(shi)用添加能(neng)(neng)(neng)(neng)(neng)德偶(ou)(ou)聯(lian)劑(ji)(ji)(ji)的(de)(de)(de)玻纖(xian)(xian)樹(shu)(shu)脂(zhi)(zhi)(zhi)復(fu)合(he)材(cai)(cai)料(liao)(liao)(liao),不僅能(neng)(neng)(neng)(neng)(neng)大(da)幅提升(sheng)部(bu)(bu)件(jian)(jian)的(de)(de)(de)強(qiang)度(du),使(shi)其(qi)承受更大(da)的(de)(de)(de)載荷(he),還能(neng)(neng)(neng)(neng)(neng)顯著提高材(cai)(cai)料(liao)(liao)(liao)的(de)(de)(de)耐(nai)疲勞(lao)性(xing)能(neng)(neng)(neng)(neng)(neng),延(yan)長(chang)部(bu)(bu)件(jian)(jian)使(shi)用壽命,保障飛(fei)(fei)行(xing)(xing)(xing)器在(zai)(zai)復(fu)雜(za)工(gong)況下的(de)(de)(de)**飛(fei)(fei)行(xing)(xing)(xing)。在(zai)(zai)汽(qi)車制(zhi)造(zao)中(zhong),輕量(liang)化(hua)是降低能(neng)(neng)(neng)(neng)(neng)耗、提高性(xing)能(neng)(neng)(neng)(neng)(neng)的(de)(de)(de)重(zhong)要(yao)途徑,能(neng)(neng)(neng)(neng)(neng)德偶(ou)(ou)聯(lian)劑(ji)(ji)(ji)助(zhu)力(li)的(de)(de)(de)玻纖(xian)(xian)樹(shu)(shu)脂(zhi)(zhi)(zhi)復(fu)合(he)材(cai)(cai)料(liao)(liao)(liao),讓汽(qi)車零部(bu)(bu)件(jian)(jian)在(zai)(zai)減重(zhong)的(de)(de)(de)同時,保持(chi)甚至提升(sheng)機械性(xing)能(neng)(neng)(neng)(neng)(neng),為汽(qi)車行(xing)(xing)(xing)業的(de)(de)(de)綠色發(fa)展(zhan)提供(gong)有(you)力(li)支持(chi)!偶(ou)(ou)聯(lian)劑(ji)(ji)(ji)讓木(mu)器涂(tu)料(liao)(liao)(liao)告別(bie)剝落困擾,打造(zao)恒(heng)美(mei)耐(nai)用家居木(mu)飾(shi)!建筑防水(shui)偶(ou)(ou)聯(lian)劑(ji)(ji)(ji)種類

打造超硬核橡膠(jiao)輸送(song)(song)(song)帶,強(qiang)度高(gao)(gao)(gao)、壽命長,工(gong)業生(sheng)(sheng)產(chan)高(gao)(gao)(gao)效無(wu)憂。橡膠(jiao)輸送(song)(song)(song)帶廣泛應用于(yu)(yu)礦山、港口、電力(li)等行業,用于(yu)(yu)物(wu)料(liao)(liao)(liao)的(de)(de)(de)輸送(song)(song)(song)。南(nan)京能(neng)(neng)德(de)新(xin)材(cai)料(liao)(liao)(liao)技(ji)(ji)術有限公司的(de)(de)(de)偶聯(lian)劑(ji)在橡膠(jiao)輸送(song)(song)(song)帶生(sheng)(sheng)產(chan)中發揮著重要作(zuo)(zuo)用。它(ta)能(neng)(neng)增強(qiang)橡膠(jiao)與骨架(jia)材(cai)料(liao)(liao)(liao)(如(ru)鋼絲繩、纖維(wei)織物(wu)等)之間的(de)(de)(de)粘結力(li),使(shi)骨架(jia)材(cai)料(liao)(liao)(liao)與橡膠(jiao)緊密結合,提(ti)高(gao)(gao)(gao)輸送(song)(song)(song)帶的(de)(de)(de)拉(la)伸強(qiang)度和抗撕裂性能(neng)(neng)。同(tong)時(shi),南(nan)京能(neng)(neng)德(de)新(xin)材(cai)料(liao)(liao)(liao)技(ji)(ji)術有限公司的(de)(de)(de)偶聯(lian)劑(ji)能(neng)(neng)改(gai)善橡膠(jiao)的(de)(de)(de)耐磨性和耐老化(hua)性能(neng)(neng),延長輸送(song)(song)(song)帶的(de)(de)(de)使(shi)用壽命。在惡劣的(de)(de)(de)工(gong)作(zuo)(zuo)環境下,如(ru)高(gao)(gao)(gao)溫(wen)、高(gao)(gao)(gao)濕(shi)、強(qiang)腐蝕等,添加了南(nan)京能(neng)(neng)德(de)新(xin)材(cai)料(liao)(liao)(liao)技(ji)(ji)術有限公司的(de)(de)(de)偶聯(lian)劑(ji)的(de)(de)(de)橡膠(jiao)輸送(song)(song)(song)帶依然能(neng)(neng)保持(chi)良好的(de)(de)(de)性能(neng)(neng),確保物(wu)料(liao)(liao)(liao)的(de)(de)(de)**、高(gao)(gao)(gao)效輸送(song)(song)(song)。為(wei)工(gong)業生(sheng)(sheng)產(chan)提(ti)供可靠的(de)(de)(de)輸送(song)(song)(song)設備,提(ti)高(gao)(gao)(gao)生(sheng)(sheng)產(chan)效率(lv)!湖南(nan)橡膠(jiao)中偶聯(lian)劑(ji)作(zuo)(zuo)用偶聯(lian)劑(ji)增強(qiang)摩擦(ca)材(cai)料(liao)(liao)(liao)結合力(li),高(gao)(gao)(gao)溫(wen)高(gao)(gao)(gao)壓(ya)穩定制動,磨損減半!

強(qiang)化(hua)聚(ju)氨(an)酯(zhi)(zhi)(zhi)膠(jiao)(jiao),增韌性(xing),固粘結(jie),滿足(zu)多元粘結(jie)需(xu)求!聚(ju)氨(an)酯(zhi)(zhi)(zhi)膠(jiao)(jiao)以其(qi)(qi)良(liang)好的(de)(de)(de)柔韌性(xing)、耐(nai)磨性(xing)和(he)耐(nai)化(hua)學腐蝕性(xing),在汽車(che)制造、家具生(sheng)產、包裝(zhuang)等(deng)行(xing)業得到(dao)廣(guang)泛應用。南京(jing)能(neng)(neng)(neng)(neng)(neng)德(de)新材(cai)(cai)料(liao)技術(shu)有限(xian)公司的(de)(de)(de)偶(ou)聯(lian)劑(ji),成為(wei)聚(ju)氨(an)酯(zhi)(zhi)(zhi)膠(jiao)(jiao)粘結(jie)效(xiao)能(neng)(neng)(neng)(neng)(neng)升(sheng)級(ji)的(de)(de)(de)強(qiang)大引擎。能(neng)(neng)(neng)(neng)(neng)德(de)偶(ou)聯(lian)劑(ji)能(neng)(neng)(neng)(neng)(neng)增強(qiang)聚(ju)氨(an)酯(zhi)(zhi)(zhi)膠(jiao)(jiao)與不(bu)同材(cai)(cai)質的(de)(de)(de)粘結(jie)強(qiang)度,在汽車(che)內飾(shi)的(de)(de)(de)組裝(zhuang)中,無論(lun)是塑(su)料(liao)、皮革還是金屬部件,添加能(neng)(neng)(neng)(neng)(neng)德(de)偶(ou)聯(lian)劑(ji)的(de)(de)(de)聚(ju)氨(an)酯(zhi)(zhi)(zhi)膠(jiao)(jiao)都(dou)能(neng)(neng)(neng)(neng)(neng)實現牢固粘結(jie),確保(bao)內飾(shi)在車(che)輛行(xing)駛過(guo)程(cheng)中不(bu)會因(yin)震動(dong)而松(song)動(dong)。在家具制造中,能(neng)(neng)(neng)(neng)(neng)德(de)偶(ou)聯(lian)劑(ji)使聚(ju)氨(an)酯(zhi)(zhi)(zhi)膠(jiao)(jiao)在木材(cai)(cai)、織物等(deng)材(cai)(cai)料(liao)間發揮出色的(de)(de)(de)粘結(jie)作用,提升(sheng)家具的(de)(de)(de)結(jie)構穩定性(xing)和(he)使用壽命(ming)。同時(shi),能(neng)(neng)(neng)(neng)(neng)德(de)偶(ou)聯(lian)劑(ji)還能(neng)(neng)(neng)(neng)(neng)改善聚(ju)氨(an)酯(zhi)(zhi)(zhi)膠(jiao)(jiao)的(de)(de)(de)耐(nai)候性(xing),使其(qi)(qi)在戶外環境下也能(neng)(neng)(neng)(neng)(neng)保(bao)持良(liang)好的(de)(de)(de)性(xing)能(neng)(neng)(neng)(neng)(neng)!
【能(neng)(neng)(neng)德(de)偶聯(lian)劑(ji):賦能(neng)(neng)(neng)水(shui)(shui)性(xing)(xing)(xing)(xing)工(gong)業(ye)(ye)漆(qi)(qi)(qi)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)進(jin)階的(de)(de)創(chuang)(chuang)新(xin)方(fang)案(an)】在(zai)全球環保標(biao)準持續(xu)升級的(de)(de)背景下,水(shui)(shui)性(xing)(xing)(xing)(xing)工(gong)業(ye)(ye)漆(qi)(qi)(qi)憑借綠(lv)色涂(tu)裝(zhuang)優勢,正(zheng)逐步成(cheng)(cheng)為(wei)工(gong)業(ye)(ye)防腐、防護領域的(de)(de)主流選擇。然而(er)(er),其在(zai)漆(qi)(qi)(qi)膜硬度(du)、耐(nai)(nai)磨(mo)耗(hao)性(xing)(xing)(xing)(xing)及耐(nai)(nai)腐蝕(shi)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)等關鍵指標(biao)上,仍(reng)存在(zai)優化(hua)空(kong)間。南京能(neng)(neng)(neng)德(de)新(xin)材料(liao)(liao)技術有(you)限公司深耕界面(mian)化(hua)學領域,為(wei)水(shui)(shui)性(xing)(xing)(xing)(xing)工(gong)業(ye)(ye)漆(qi)(qi)(qi)的(de)(de)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)突破(po)提(ti)供(gong)了科學解決方(fang)案(an)。能(neng)(neng)(neng)德(de)偶聯(lian)劑(ji)通過(guo)獨特(te)的(de)(de)分子結(jie)構(gou)設(she)計,有(you)效改善水(shui)(shui)性(xing)(xing)(xing)(xing)體(ti)系中(zhong)顏料(liao)(liao)、填(tian)料(liao)(liao)與樹脂基體(ti)的(de)(de)界面(mian)相容性(xing)(xing)(xing)(xing),促進(jin)顏填(tian)料(liao)(liao)在(zai)漆(qi)(qi)(qi)膜中(zhong)的(de)(de)均勻分散,進(jin)而(er)(er)構(gou)建更(geng)致密(mi)的(de)(de)三維網(wang)狀交聯(lian)結(jie)構(gou)。這種微(wei)觀結(jie)構(gou)的(de)(de)優化(hua),為(wei)漆(qi)(qi)(qi)膜性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)帶來多重提(ti)升:在(zai)工(gong)業(ye)(ye)設(she)備涂(tu)裝(zhuang)場景中(zhong),經(jing)能(neng)(neng)(neng)德(de)偶聯(lian)劑(ji)改性(xing)(xing)(xing)(xing)的(de)(de)水(shui)(shui)性(xing)(xing)(xing)(xing)涂(tu)層,硬度(du)指標(biao)增強(qiang),可有(you)效抵御機械碰(peng)撞、摩擦(ca)等日(ri)常損耗(hao);其優異的(de)(de)耐(nai)(nai)腐蝕(shi)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng),更(geng)能(neng)(neng)(neng)在(zai)高(gao)濕度(du)、酸堿(jian)侵蝕(shi)等嚴(yan)苛(ke)環境中(zhong)形成(cheng)(cheng)長(chang)效防護屏障,延緩金屬基材的(de)(de)銹蝕(shi)進(jin)程,助力(li)設(she)備延長(chang)服役周期。能(neng)(neng)(neng)德(de)新(xin)材料(liao)(liao)始終致力(li)于平衡環保需(xu)求與性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)升級。旗(qi)下偶聯(lian)劑(ji)產品不僅符合嚴(yan)苛(ke)的(de)(de)環保法規,更(geng)通過(guo)技術創(chuang)(chuang)新(xin)突破(po)傳統水(shui)(shui)性(xing)(xing)(xing)(xing)漆(qi)(qi)(qi)的(de)(de)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)瓶頸,推動(dong)(dong)工(gong)業(ye)(ye)涂(tu)裝(zhuang)行(xing)(xing)業(ye)(ye)向“高(gao)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)、低排放(fang)”的(de)(de)可持續(xu)發展模式邁進(jin)。未來,能(neng)(neng)(neng)德(de)將繼續(xu)以界面(mian)化(hua)學創(chuang)(chuang)新(xin)為(wei)驅動(dong)(dong),為(wei)更(geng)多綠(lv)色涂(tu)料(liao)(liao)體(ti)系提(ti)供(gong)定制化(hua)解決方(fang)案(an),賦能(neng)(neng)(neng)行(xing)(xing)業(ye)(ye)高(gao)質量發展。偶聯(lian)劑(ji)賦能(neng)(neng)(neng)環氧膠,強(qiang)粘結(jie),抗嚴(yan)苛(ke),穩固工(gong)業(ye)(ye)連接(jie)。

增(zeng)強(qiang)(qiang)粘(zhan)結、抵御(yu)環(huan)境,讓光能(neng)(neng)(neng)(neng)(neng)轉(zhuan)化一路 “狂(kuang)飆” 。太(tai)陽(yang)能(neng)(neng)(neng)(neng)(neng)電池(chi)作為清潔能(neng)(neng)(neng)(neng)(neng)源(yuan)的(de)重要來源(yuan),其封(feng)(feng)裝(zhuang)(zhuang)材(cai)(cai)料的(de)性(xing)(xing)能(neng)(neng)(neng)(neng)(neng)影響著(zhu)電池(chi)的(de)轉(zhuan)換(huan)效(xiao)率和使用壽(shou)命。南京(jing)能(neng)(neng)(neng)(neng)(neng)德新材(cai)(cai)料技術有(you)限公司的(de)偶(ou)(ou)聯(lian)(lian)劑(ji)在太(tai)陽(yang)能(neng)(neng)(neng)(neng)(neng)電池(chi)封(feng)(feng)裝(zhuang)(zhuang)材(cai)(cai)料中至(zhi)關重要。它(ta)能(neng)(neng)(neng)(neng)(neng)增(zeng)強(qiang)(qiang)封(feng)(feng)裝(zhuang)(zhuang)材(cai)(cai)料與電池(chi)片之間的(de)粘(zhan)結力,提(ti)高(gao)封(feng)(feng)裝(zhuang)(zhuang)的(de)密封(feng)(feng)性(xing)(xing),有(you)效(xiao)阻擋水(shui)分、氧氣等(deng)對(dui)電池(chi)片的(de)侵蝕(shi),延長電池(chi)的(de)使用壽(shou)命。在戶外環(huan)境下(xia),太(tai)陽(yang)能(neng)(neng)(neng)(neng)(neng)電池(chi)面臨著(zhu)高(gao)溫、高(gao)濕、紫外線(xian)等(deng)多種考驗,添(tian)加南京(jing)能(neng)(neng)(neng)(neng)(neng)德新材(cai)(cai)料技術有(you)限公司的(de)偶(ou)(ou)聯(lian)(lian)劑(ji)的(de)封(feng)(feng)裝(zhuang)(zhuang)材(cai)(cai)料能(neng)(neng)(neng)(neng)(neng)更好地(di)適應這些環(huan)境,保持良好的(de)性(xing)(xing)能(neng)(neng)(neng)(neng)(neng)。同時,它(ta)還能(neng)(neng)(neng)(neng)(neng)提(ti)升封(feng)(feng)裝(zhuang)(zhuang)材(cai)(cai)料的(de)光學性(xing)(xing)能(neng)(neng)(neng)(neng)(neng),減少光線(xian)反射,提(ti)高(gao)電池(chi)對(dui)光能(neng)(neng)(neng)(neng)(neng)的(de)吸收效(xiao)率,從而(er)提(ti)升太(tai)陽(yang)能(neng)(neng)(neng)(neng)(neng)電池(chi)的(de)整體性(xing)(xing)能(neng)(neng)(neng)(neng)(neng),為太(tai)陽(yang)能(neng)(neng)(neng)(neng)(neng)產業(ye)的(de)發(fa)展注入新動力!偶(ou)(ou)聯(lian)(lian)劑(ji)強(qiang)(qiang)增(zeng)粘(zhan),無懼環(huan)境挑戰(zhan),穩(wen)固各行各業(ye)粘(zhan)接需求 !四川偶(ou)(ou)聯(lian)(lian)劑(ji)廠家
偶(ou)聯劑開啟美(mei)妝新境界,均勻分散,穩定增效,妝點非凡(fan)魅力!建筑防水偶(ou)聯劑種類
在(zai)綠(lv)(lv)色(se)建(jian)筑(zhu)(zhu)理念深入人心的(de)(de)當(dang)下,MS 膠(jiao)(jiao)(jiao)作為環(huan)(huan)保型膠(jiao)(jiao)(jiao)黏劑(ji),在(zai)建(jian)筑(zhu)(zhu)裝(zhuang)飾(shi)(shi)、門窗密封(feng)等領域(yu)應用(yong)愈發(fa)大。南京能(neng)(neng)(neng)(neng)德(de)新(xin)材料技(ji)術有限公(gong)司研發(fa)的(de)(de)偶聯(lian)(lian)劑(ji),為 MS 膠(jiao)(jiao)(jiao)性(xing)(xing)能(neng)(neng)(neng)(neng)提(ti)升提(ti)供(gong)了重要(yao)支持,助力(li)(li)建(jian)筑(zhu)(zhu)密封(feng)領域(yu)實現新(xin)突破。能(neng)(neng)(neng)(neng)德(de)偶聯(lian)(lian)劑(ji)可(ke)優(you)(you)化(hua) MS 膠(jiao)(jiao)(jiao)的(de)(de)固化(hua)性(xing)(xing)能(neng)(neng)(neng)(neng),使(shi)其在(zai)不同濕(shi)度環(huan)(huan)境(jing)中均能(neng)(neng)(neng)(neng)較快且均勻地固化(hua),形(xing)成緊密的(de)(de)密封(feng)層。這(zhe)種(zhong)性(xing)(xing)能(neng)(neng)(neng)(neng)優(you)(you)勢在(zai)門窗密封(feng)工程(cheng)中尤為明顯:添(tian)加該(gai)偶聯(lian)(lian)劑(ji)的(de)(de) MS 膠(jiao)(jiao)(jiao)能(neng)(neng)(neng)(neng)有效填充縫隙,減少(shao)風雨侵入,同時具備良好的(de)(de)耐老化(hua)特性(xing)(xing),可(ke)長時間維持密封(feng)效果,有助于降低門窗因密封(feng)問(wen)題導(dao)致的(de)(de)能(neng)(neng)(neng)(neng)耗。在(zai)建(jian)筑(zhu)(zhu)裝(zhuang)飾(shi)(shi)場景中,能(neng)(neng)(neng)(neng)德(de)偶聯(lian)(lian)劑(ji)幫助 MS 膠(jiao)(jiao)(jiao)與(yu)多種(zhong)裝(zhuang)飾(shi)(shi)材料實現較好結(jie)合。無論(lun)是(shi)瓷磚、木材還是(shi)金屬(shu)板(ban)材,使(shi)用(yong)后不僅密封(feng)性(xing)(xing)能(neng)(neng)(neng)(neng)可(ke)靠,還能(neng)(neng)(neng)(neng)保持裝(zhuang)飾(shi)(shi)面(mian)的(de)(de)美觀整潔(jie),兼顧功能(neng)(neng)(neng)(neng)性(xing)(xing)與(yu)觀賞性(xing)(xing)。作為行(xing)業內的(de)(de)技(ji)術探索者,南京能(neng)(neng)(neng)(neng)德(de)新(xin)材料始(shi)終以創(chuang)新(xin)為驅動力(li)(li),通(tong)過(guo)偶聯(lian)(lian)劑(ji)產品賦能(neng)(neng)(neng)(neng) MS 膠(jiao)(jiao)(jiao),使(shi)其在(zai)建(jian)筑(zhu)(zhu)密封(feng)領域(yu)的(de)(de)優(you)(you)勢進一步發(fa)揮。未(wei)來,公(gong)司將(jiang)繼(ji)續深耕,為打造(zao)更舒適、節能(neng)(neng)(neng)(neng)的(de)(de)建(jian)筑(zhu)(zhu)環(huan)(huan)境(jing)貢獻力(li)(li)量,與(yu)行(xing)業共(gong)同推動綠(lv)(lv)色(se)建(jian)筑(zhu)(zhu)發(fa)展。建(jian)筑(zhu)(zhu)防水偶聯(lian)(lian)劑(ji)種(zhong)類