相信大家曾經都和我一樣有這么一個疑問,聰明蓋是什么呢?干什么用的?第一次聽說“聰明蓋”的(de)(de)時候,確實吃驚(jing)不小,這么“聰(cong)明”的(de)(de)名字(zi),到(dao)底(di)是怎(zen)么來的(de)(de)呢?桶裝(zhuang)水(shui)蓋(gai)為什么叫聰(cong)明蓋(gai)呢?
其實聰明蓋是桶(tong)裝水的(de)一(yi)個(ge)(ge)重要部分,它起到密(mi)封(feng)整個(ge)(ge)水桶(tong)、防止細菌滋生的(de)作用,因此(ci)被廣泛應用在桶(tong)裝水包裝上。 一(yi)般來說桶(tong)裝水的(de)蓋子是由食品級聚乙烯(PE)注塑而成(cheng)。目前,市場(chang)上桶(tong)蓋內(nei)常見有一(yi)種(zhong)應用軟膠來增加(jia)密(mi)封(feng)性的(de)內(nei)墊,這種(zhong)軟膠內(nei)墊是一(yi)種(zhong)改性塑料,又稱熱塑性彈性體(簡稱TPE)。
當給飲(yin)(yin)水(shui)機(ji)換水(shui)的(de)(de)(de)時候(hou),水(shui)桶(tong)需(xu)要倒過來,但是如果提前把桶(tong)裝(zhuang)(zhuang)(zhuang)水(shui)的(de)(de)(de)蓋(gai)子打(da)開(kai),再放到(dao)飲(yin)(yin)水(shui)機(ji)上(shang),水(shui)肯定會灑出來。聰(cong)(cong)(cong)明(ming)(ming)蓋(gai)就聰(cong)(cong)(cong)明(ming)(ming)在(zai)這,不用提前打(da)開(kai)蓋(gai)子,桶(tong)裝(zhuang)(zhuang)(zhuang)水(shui)放到(dao)飲(yin)(yin)水(shui)機(ji)上(shang)的(de)(de)(de)時候(hou),撕開(kai)聰(cong)(cong)(cong)明(ming)(ming)蓋(gai)外(wai)層的(de)(de)(de)“一桶(tong)一碼防偽”合格證,讓聰(cong)(cong)(cong)明(ming)(ming)座管(guan)狀的(de)(de)(de)突起對準桶(tong)裝(zhuang)(zhuang)(zhuang)水(shui)聰(cong)(cong)(cong)明(ming)(ming)蓋(gai)中間的(de)(de)(de)洞,桶(tong)裝(zhuang)(zhuang)(zhuang)水(shui)扶正(zheng),利用一桶(tong)水(shui)的(de)(de)(de)重量,就能(neng)很輕松的(de)(de)(de)捅開(kai)聰(cong)(cong)(cong)明(ming)(ming)蓋(gai)一次性的(de)(de)(de)內(nei)蓋(gai),水(shui)會順著聰(cong)(cong)(cong)明(ming)(ming)座流(liu)進(jin)飲(yin)(yin)水(shui)機(ji),這樣不會弄灑一滴水(shui)。
關(guan)于蒸發殘渣
新GB 5009.156-2016 食(shi)(shi)品(pin)安全(quan)國家標準 食(shi)(shi)品(pin)接(jie)觸(chu)材料及制(zhi)品(pin)遷(qian)移(yi)試(shi)驗(yan)預處(chu)理方法通則(ze)(2017-4-19實(shi)施)中描述:試(shi)樣經過各(ge)種溶(rong)液(ye)(ye)浸(jin)泡(pao)后(hou),蒸(zheng)(zheng)發殘渣即表示在(zai)不同浸(jin)泡(pao)液(ye)(ye)中的(de)溶(rong)出量。蒸(zheng)(zheng)發殘渣的(de)檢測通常(chang)采(cai)用(yong)水(shui)、乙酸溶(rong)液(ye)(ye)、乙醇溶(rong)液(ye)(ye)、正己烷,正庚烷,橄欖油(you)等作為各(ge)種食(shi)(shi)品(pin)的(de)模擬物。這一(yi)指(zhi)標主要是(shi)反映產品(pin)在(zai)使(shi)用(yong)過程(cheng)中遇水(shui)、醋、酒、油(you)這四(si)種不同性質(zhi)的(de)食(shi)(shi)品(pin)時(shi),析(xi)出化學物質(zhi)的(de)量。如某一(yi)產品(pin)蒸(zheng)(zheng)發殘渣超標,其在(zai)使(shi)用(yong)過程(cheng)可能(neng)對人體(ti)健康(kang)產生影響,此外殘渣還會直接(jie)影響食(shi)(shi)品(pin)的(de)色、香、味(wei)等食(shi)(shi)用(yong)質(zhi)量。
關于材質
一(yi)般來說桶(tong)裝水的蓋子是(shi)(shi)(shi)由食品(pin)級聚乙(yi)烯(PE)注(zhu)塑(su)(su)而(er)成(cheng)。目前,市場(chang)上桶(tong)蓋內(nei)常(chang)見有(you)一(yi)種(zhong)(zhong)(zhong)應用(yong)軟(ruan)膠來增加密封(feng)性(xing)(xing)(xing)的內(nei)墊,這種(zhong)(zhong)(zhong)軟(ruan)膠內(nei)墊是(shi)(shi)(shi)一(yi)種(zhong)(zhong)(zhong)改性(xing)(xing)(xing)塑(su)(su)料,又(you)稱熱(re)(re)塑(su)(su)性(xing)(xing)(xing)彈(dan)性(xing)(xing)(xing)體(ti)(ti)(簡(jian)稱TPE)。 熱(re)(re)塑(su)(su)性(xing)(xing)(xing)彈(dan)性(xing)(xing)(xing)體(ti)(ti)具有(you)多(duo)種(zhong)(zhong)(zhong)可能(neng)的結構(gou),其中以(yi)苯乙(yi)烯類(SBS、SIS、SEBS、SEPS)、烯烴類(TPO、TPV)為(wei)主。以(yi)苯乙(yi)烯類熱(re)(re)塑(su)(su)性(xing)(xing)(xing)彈(dan)性(xing)(xing)(xing)體(ti)(ti)SBS生產為(wei)例,聚合反應通常(chang)都(dou)是(shi)(shi)(shi)不(bu)(bu)(bu)完全的,總是(shi)(shi)(shi)或多(duo)或少存在(zai)(zai)于聚合物SBS內(nei),正己烷(wan)(wan)和這些殘留(liu)物又(you)有(you)良好(hao)的互溶(rong)(rong)性(xing)(xing)(xing),這使得熱(re)(re)塑(su)(su)性(xing)(xing)(xing)彈(dan)性(xing)(xing)(xing)體(ti)(ti)在(zai)(zai)進(jin)行(xing)(xing)正己烷(wan)(wan)蒸(zheng)發(fa)殘渣試驗時溶(rong)(rong)出(chu)(chu)量(liang)(liang)較高。FDA 21CFR 177.2600對食品(pin)級熱(re)(re)塑(su)(su)性(xing)(xing)(xing)彈(dan)性(xing)(xing)(xing)體(ti)(ti)規(gui)定了(le)在(zai)(zai)水回(hui)流第(di)一(yi)次提(ti)(ti)取7小(xiao)時下,溶(rong)(rong)出(chu)(chu)量(liang)(liang)不(bu)(bu)(bu)超(chao)過(guo)(guo)20mg/inch2,第(di)二次提(ti)(ti)取2小(xiao)時下,溶(rong)(rong)出(chu)(chu)量(liang)(liang)不(bu)(bu)(bu)超(chao)過(guo)(guo)1mg/inch2;規(gui)定了(le)在(zai)(zai)正己烷(wan)(wan)回(hui)流第(di)一(yi)次提(ti)(ti)取7小(xiao)時下,溶(rong)(rong)出(chu)(chu)量(liang)(liang)不(bu)(bu)(bu)超(chao)過(guo)(guo)175mg/inch2,第(di)二次提(ti)(ti)取2小(xiao)時下,溶(rong)(rong)出(chu)(chu)量(liang)(liang)不(bu)(bu)(bu)超(chao)過(guo)(guo)4mg/inch2。藉此,在(zai)(zai)對桶(tong)蓋進(jin)行(xing)(xing)蒸(zheng)發(fa)殘渣試驗時,需對材質進(jin)行(xing)(xing)鑒定后(hou)分別(bie)根據適用(yong)條件(jian)進(jin)行(xing)(xing)試驗。