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    泰州科德橡膠機械-開煉機:皮革移門的認識

    發布時間:2019-08-23 10:58:00 點擊:    關鍵詞:密煉機,捏煉機,開煉機,橡膠機械


    泰州科德橡膠機械-開煉機密煉機捏煉機廠家2019年8月23日訊  一類外觀、手感似皮革并可代替其使用的塑料制品。通常以織物為底基,涂覆由合成樹脂添加各種塑料添加劑制成的配混料制成。
    在我國,人們習慣將用PVC樹脂為原料生產的人造革稱為PVC人造革(簡稱人造革);用PU樹脂為原料生產的人造革稱為PU人造革(簡稱PU革):用PU樹脂與無紡布為原料生產的人造革稱為PU合成革(簡稱合成革)。
    一種類似皮革的塑料制品。通常以織物為底基,在其上涂布刮上樹脂混合物,然后加熱使之塑化,并經滾壓壓平或壓花,即得產品。近似于天然皮革,具有柔軟、耐磨等特點。根據覆蓋物的種類不同,有聚氯乙烯人造革(PVC),聚氨酯人造革(PU)等。幾乎可以在任何使用皮革的場合取而代之,用于制作日用品及建筑工業用品。根據覆蓋層發泡與否,又分泡沫人造革和變通人造革。按照用途有鞋用人造革、箱包用人造革等。

    開煉機,密煉機,捏煉機,橡膠機械

    發展

    20世紀初期
    用硝酸纖維素溶膠涂覆織物所制成的硝酸纖維素漆布是人造革的先驅。
    20世紀30年代
    聚氯乙烯工業化生產為人造革開辟了新的原料資源,促進人造革生產的發展。聚氯乙烯添加增塑劑、穩定劑等所制成的糊料易著色,涂層凝膠化后,經印花、壓紋或壓紋、印花,即可制成多種外觀與皮革相似的產品。其透氣、透濕性等雖不及天然皮革,但具有一定的強度和耐磨性,特別是生產簡便,原料豐富,產品質量穩定,便于剪裁使用,質輕,耐水,成本低,因此廣泛用于制作服裝、鞋帽、箱包、家居領域及各種工業用途。
    隨著塑料品種和加工技術的發展,人造革形成多種系列產品。涂覆層原料除聚氯乙烯外,還采用聚酰胺、聚氨酯、聚烯烴等。底基織物的品種也有很多種,如平布、帆布、針織布、起毛布、無紡布等。不同品種和花色的人造革生產,還區別于基布面層的涂覆和凝膠化方式,以及工藝,如壓花、印花、表面處理等的順序和表面處理劑的組成。

    應用領域


    我國人造革合成革工業是建國后新興的工業,于五十年代末起步發展,是塑料工業中發展較早的行業之一。經過近幾十年的建設,人造革合成革行業已具有相當的經濟規模;隨著國內外高科技的發展與先進工藝設備的應用,行業管理、技術水平、產品檔次都有了根本性的質的飛躍,人造革合成革已發展成為日常消費制品工業中重要的行業之一,與整個加工工業同步邁入世界大國行列,是世界上的生產大國、消費大國,進出口貿易大國之一。
    人造革合成革產業鏈已經形成幾千家的上游原料和幾萬家下游制造商,而且人造革合成革不僅隸屬塑料行業,而且還分布在皮革系統、紡織系統、部隊、交通等系統。另外人造革合成革生產制造是一門專業性很強的學問,涉及應用幾十種塑料高分子材料、無機物類的填充介質、紡織布基理論、智能自動化應用、印刷專業、涂料工業、服裝業、鞋業、等人文理論;產品紋路設計上要應用美學、文字學、植物、動物、自然、幾何學等等相關的文化知識。在制造過程中對于PVC樹脂、PU樹脂、DOP增塑劑等上游原料的分子量等數值、特性要有比較深入的研究,特別是超細纖維,透氣革的研究還應在對天然皮革結構的了解的基礎上,才能更好的設計它的微孔結構。人造革合成革生產工藝相當的復雜,壓延法、涂刮法、流延法、鋼帶法以及后處理工藝藝術噴涂、套色、印刷、植絨、磨皮、壓花等幾十種工藝路線。人造革合成革的物理性能、化學性能、質感、手感、視覺效果已經達到動物皮的性能,這是人類生產力發與智慧的結晶。人造革合成革有3000多個品種,下游產品的應用越來越廣泛,涉及到航天領域、潛水行業、交通工具、體育器材、醫療器材、建筑材料,包括了人們日常生活所必須的箱包面料、鞋面料、服裝面料、沙發面料等。研制出來的納米材料應用于人造革合成革,抗輻射合成革、防紅外線合成革的問世以及防臭、防霉、耐酸、耐堿、耐老化、阻燃等功能改變了傳統產品單一化的現狀,為人造革合成革行業的發展揭開了歷史的新一頁。

    生產方法


    包括基布處理、膠料制備、涂覆、貼合、凝膠化、表面處理、壓花、冷卻、卷取等工序。其主要生產方法有4種。
    直接涂覆法
    將膠料用刮刀直接涂覆在經預處理的基布上,然后入塑化箱進行凝膠化及塑化,再經壓花、冷卻等工序,即得成品。此法可生產各種布基的普通人造革、貼膜人造革和發泡人造革。
    轉移涂覆法
    又稱間接涂覆法。將糊料用逆輥或刮刀涂覆于載體(離型紙帶或不銹鋼帶)上,經凝膠化后,再將布基在不受張力下復合在經凝膠化的料層上,再經塑化、冷卻并從載體上剝離,然后進行后處理,即得成品。此法適于生產針織布或無紡布基泡沫人造革和普通人造革。
    壓延貼合法
    按配方要求,將樹脂、增塑劑及其他配合劑計量后,投入捏合機中混合均勻,再經密煉機開煉機或擠出機煉塑后,送至三輥或四輥壓延機(見塑料機械壓延成所需厚度和寬度的薄膜,并與預先加熱的基布貼合,然后經壓花、冷卻即得成品。此法可生產不同布基的各種人造革。為了提高基布與薄膜的貼合效果,常在基布上先涂一層膠粘劑。
    擠出貼合法
    將樹脂、增塑劑及其他配合劑在捏合機中混合均勻,經煉塑后,由擠出機擠成一定厚度與寬度的膜層,然后在三輥定型機上與預熱的基布貼合,再經預熱、貼膜、壓花、冷卻即得成品。此法用于制造較厚的產品,如地板革、傳送帶等。


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