注塑模(mo)工藝條件(jian):干(gan)燥:如果存(cun)儲恰(qia)當(dang)則無須干(gan)燥。熔(rong)化溫(wen)度(du)(du):220~260C。對于(yu)分子較大的(de)材料,建議熔(rong)化溫(wen)度(du)(du)范圍在(zai)200~250C之間。模(mo)具溫(wen)度(du)(du):50~95C。6mm以下壁厚的(de)塑件(jian)應使用較高的(de)模(mo)具溫(wen)度(du)(du),6mm以上壁厚的(de)塑件(jian)使用較低的(de)模(mo)具溫(wen)度(du)(du)。塑件(jian)冷(leng)卻溫(wen)度(du)(du)應當(dang)均勻以減小收縮率的(de)差異。對于(yu)最優的(de)加工周期時間,冷(leng)卻腔道直徑應不小于(yu)8mm,...
高密度(du)聚乙烯,英(ying)文名稱(cheng)為“High Density Polyethylene”,簡稱(cheng)為“HDPE”。HDPE是一(yi)種結晶度(du)高、非極性的(de)熱(re)塑性樹脂。原(yuan)態HDPE的(de)外表呈(cheng)乳白(bai)色,在微薄截(jie)面呈(cheng)一(yi)定程(cheng)度(du)的(de)半透明狀。PE具有優(you)良的(de)耐大多數生(sheng)活和工(gong)業用化(hua)學品的(de)特性。某些種類的(de)化(hua)學品會產生(sheng)化(hua)學腐蝕,例如腐蝕性氧化(hua)劑(濃(nong)硝酸),芳(fang)香烴(二(er)甲苯)和鹵化(hua)烴(四...
硬(ying)質PVC管(guan)(guan)材(cai)、管(guan)(guan)件在(zai)眾多(duo)PVC制品(pin)(pin)中,在(zai)我(wo)國呈(cheng)快速增長(chang)之勢(shi),也是(shi)各種(zhong)塑(su)料(liao)管(guan)(guan)道中消費量最大的(de)(de)品(pin)(pin)種(zhong)。我(wo)國PVC管(guan)(guan)材(cai)經過近(jin)幾年的(de)(de)宣傳推廣,特別是(shi)國家有關政策(ce)的(de)(de)支持,PVC管(guan)(guan)材(cai)生產和(he)應用取得了長(chang)足(zu)發展,PVC管(guan)(guan)材(cai)產量已占塑(su)料(liao)管(guan)(guan)材(cai)總產量的(de)(de)50%以(yi)上,廣泛應用于(yu)工業(ye)、建筑、農業(ye)等許多(duo)行業(ye)。 一、PVC管(guan)(guan)材(cai)發展情況 1、PVC管(guan)(guan)材(cai)優勢(shi) 在(zai)...
英(ying)文(wen)簡稱 英(ying)文(wen)全稱 中文(wen)全稱 ABS Acrylonitrile-butadiene-styrene 丙(bing)(bing)烯(xi)(xi)腈(jing)(jing)/丁(ding)二烯(xi)(xi)/苯(ben)乙烯(xi)(xi)共(gong)(gong)聚物 AES Acrylonitrile-ethylene-styrene 丙(bing)(bing)烯(xi)(xi)腈(jing)(jing)/乙烯(xi)(xi)/苯(ben)乙烯(xi)(xi)共(gong)(gong)聚物 AS Acrylonitrile-styrene resin 丙(bing)(bing)烯(xi)(xi)腈(jing)(jing)/苯(ben)乙烯(xi)(xi)共(gong)(gong)聚物 ASA Acrylonitrile-styrene-acrylate 丙(bing)(bing)烯(xi)(xi)腈(jing)(jing)/苯(ben)乙烯(xi)(xi)/丙(bing)(bing)烯(xi)(xi)酸(suan)(suan)酯(zhi)共(gong)(gong)聚物 CA Cellulose acetate 醋酸(suan)(suan)纖維塑料 C...
名(ming)稱(cheng)英文燃(ran)(ran)(ran)燒(shao)(shao)情況(kuang)燃(ran)(ran)(ran)燒(shao)(shao)火焰(yan)狀態離(li)火后情況(kuang)氣(qi)味聚丙(bing)烯(xi)PP容(rong)易(yi)(yi)熔融(rong)(rong)滴落(luo),上黃(huang)下(xia)(xia)藍(lan)煙(yan)(yan)少(shao) 繼(ji)續燃(ran)(ran)(ran)燒(shao)(shao)石油味聚乙烯(xi)PE容(rong)易(yi)(yi)熔融(rong)(rong)滴落(luo),上黃(huang)下(xia)(xia)藍(lan)繼(ji)續燃(ran)(ran)(ran)燒(shao)(shao)石蠟燃(ran)(ran)(ran)燒(shao)(shao)氣(qi)味聚氯乙烯(xi)PVC難(nan) 軟化上黃(huang)下(xia)(xia)綠有煙(yan)(yan)離(li)火熄滅刺激性酸味聚甲醛POM容(rong)易(yi)(yi) 熔融(rong)(rong)滴落(luo)上黃(huang)下(xia)(xia)藍(lan),無煙(yan)(yan)繼(ji)續燃(ran)(ran)(ran)燒(shao)(shao)強烈(lie)刺激甲醛味聚苯(ben)乙烯(xi)PS容(rong)易(yi)(yi)軟化起泡橙黃(huang)色(se),濃黑煙(yan)(yan),炭末繼(ji)續燃(ran)(ran)(ran)燒(shao)(shao)表面...
(1)制造容(rong)器、外(wai)殼、蓋、導(dao)管的塑料(liao) 。這類制品一般不(bu)要(yao)求承載很(hen)大負荷,但要(yao)求有良(liang)(liang)好甚至(zhi)優良(liang)(liang)的沖(chong)擊(ji)強度和硬度、良(liang)(liang)好的或(huo)(huo)適(shi)中(zhong)的拉伸強度和尺寸(cun)穩(wen)定(ding)性(xing),以及良(liang)(liang)好的外(wai)觀和耐環境(jing)性(xing),并(bing)要(yao)求材料(liao)的價格適(shi)中(zhong)。對另有特殊性(xing)能要(yao)求的應(ying)專門考慮。如果采用金屬制造時,一般是(shi)采用鋼板、型鋼、鑄(zhu)鋁或(huo)(huo)沖(chong)切鋁、輕合(he)金或(huo)(huo)壓(ya)鑄(zhu)金屬。這些...
為(wei)了進(jin)一步改善熱固性(xing)及熱塑(su)(su)性(xing)塑(su)(su)料(liao)的力學性(xing)能。常(chang)在塑(su)(su)料(liao)中加入玻(bo)璃(li)纖維(wei)(簡 稱玻(bo)纖),滑石(shi)粉、云母、碳酸(suan)鈣、高嶺土、碳纖維(wei)等(deng)作(zuo)為(wei)增(zeng)(zeng)強材料(liao),以樹(shu)(shu)脂(zhi)為(wei)母體及粘結劑而組(zu)成新型復合(he)材料(liao),稱為(wei)增(zeng)(zeng)強塑(su)(su)料(liao)(如環氧樹(shu)(shu)脂(zhi)為(wei)母體樹(shu)(shu)脂(zhi) 塑(su)(su)料(liao)的增(zeng)(zeng)強塑(su)(su)料(liao)又稱為(wei)玻(bo)璃(li)鋼)。由于塑(su)(su)料(liao)混用玻(bo)璃(li)纖維(wei)的品(pin)種(zhong)、長度(du)、含(han)量等(deng)不同,其工藝性(xing)及物(wu)性(xing)也各(ge)...
耐腐蝕(shi):不(bu)受(shou)腐蝕(shi)土(tu)壤和(he)(he)各(ge)種(zhong)生(sheng)活用(yong)品的(de)影(ying)響,可耐廣泛的(de)化學物(wu) 品包(bao)括一般性酸(suan)堿;不(bu)生(sheng)銹(xiu),不(bu)結垢,因而其(qi)內部(bu)不(bu)會(hui)產生(sheng)侵蝕(shi)及收縮變化,不(bu)易堵塞(sai),外墻不(bu)會(hui)因管道生(sheng)銹(xiu)而受(shou)污染,保證建筑物(wu) 的(de)美觀。抗(kang)沖(chong)擊:因采(cai)用(yong)獨特輔助(zhu)劑配合,能受(shou)壓,抗(kang)沖(chong)擊,使用(yong)不(bu)同(tong)的(de)溫差使用(yong)場合。質輕:重量為鑄鐵管的(de)五分(fen)之一,易于(yu)運輸(shu)和(he)(he)安裝,...
1施(shi)工(gong)(gong)(gong)前的(de)(de)準(zhun)備(1)熟悉施(shi)工(gong)(gong)(gong)圖并(bing)到(dao)施(shi)工(gong)(gong)(gong)現場了(le)解情況,請設(she)計單位做(zuo)設(she)計交底(di)。(2)根據施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝要求(qiu)。準(zhun)備相應(ying)的(de)(de)施(shi)工(gong)(gong)(gong)機具。在管(guan)道連接中,應(ying)按照管(guan)材(cai)管(guan)件生(sheng)產(chan)廠家(jia)推薦的(de)(de)與該廠產(chan)品相匹配的(de)(de)焊機進行連接,同(tong)時生(sheng)產(chan)廠家(jia)應(ying)對他們的(de)(de)推薦承擔(dan)責任。在電(dian)熔焊連接中,應(ying)特別注(zhu)意這一點。(3)正式施(shi)工(gong)(gong)(gong)前應(ying)對操(cao)作(zuo)工(gong)(gong)(gong)進行專門的(de)(de)培訓(xun)。(4)采(cai)購...
常用的(de)幾種塑料管(guan)(guan)的(de)特(te)點(dian)(dian)(dian)和主要用途比較PVC管(guan)(guan)特(te)點(dian)(dian)(dian)具(ju)有(you)較好的(de)抗拉、抗壓強度,但其柔性不如其他塑料管(guan)(guan),耐腐蝕性優(you)良,價格在各類(lei)塑料管(guan)(guan)中最(zui)便宜,但低(di)溫下較脆。連(lian)接方(fang)式為粘接、承插膠圈連(lian)接、法蘭螺紋連(lian)接。主要用于住宅生活、工礦業、農(nong)業的(de)供排水(shui)、灌溉、供氣、排氣用管(guan)(guan)、電線(xian)導管(guan)(guan)、雨水(shui)管(guan)(guan)、工業防腐管(guan)(guan)等。CPVC管(guan)(guan)特(te)點(dian)(dian)(dian)耐熱...