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首页> 外文会议>International Conference on Blowing Agents and Foaming Processes; 20040510-20040511; Hamburg(DE) >SOFT MATERIALS WITH FINE CELLS USING CHEMICAL BLOWING AGENTS
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SOFT MATERIALS WITH FINE CELLS USING CHEMICAL BLOWING AGENTS

机译：使用化学发泡剂的具有细孔的软材料

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Alveo is a producer of cross-linked closed-cell foams, which are applied in interior trim, tapes and all kind of consumer applications. Fine and homogeneous foams with low densities (less then 200 kg/m3) are produced via a three-step process, viz. extrusion of sheets, crosslinking and foaming using primarily azodicarbonamide as chemical blowing agent for polyolefin foams. In this presentation soft foams based on both cross linked polyolefin's and TPE's are compared. The benefits of TPE materials in these closed-cell foams are an improved compression set and an obtained softness and flexibility at higher temperatures as compared to cross-linked polyolefin foams. Resistance to different chemicals can be tailored by using these TPE materials. Closed cell foams are normally not breathable. Some TPE materials, by contrast, are breathable despite their closed structure. For that reason TPE materials are gaining attention. TPE foams can be produced by using either chemical blowing agents or physical blowing agents. Both routes offer specific benefits. In the case of chemical blowing agents a proper knowledge of the behaviour of the foaming agent in each step of the three-step process is required to ensure fine cells. These cells have to be formed during the foaming step only meaning that the foaming agent should not decompose in the earlier steps. In this paper some TPE foams, based on polyether-amide block copolymers, are compared with some polyethylene and polypropylene foams showing the opportunities of these new foams.
机译：Alveo是交联闭孔泡沫的生产商，该泡沫可用于内饰，胶带和各种消费类应用。低密度（小于200 kg / m3）的细小均质泡沫是通过三步法生产的。片材的挤出，交联和发泡，主要使用偶氮二甲酰胺作为聚烯烃泡沫的化学发泡剂。在本演示中，对基于交联聚烯烃和TPE的软泡沫进行了比较。与交联的聚烯烃泡沫相比，TPE材料在这些闭孔泡沫中的优点是改善了压缩永久变形，并在较高温度下获得了柔软性和柔韧性。可以通过使用这些TPE材料来定制对不同化学品的耐受性。闭孔泡沫通常不透气。相比之下，某些TPE材料尽管结构封闭，但仍可透气。因此，TPE材料受到关注。可以通过使用化学发泡剂或物理发泡剂来生产TPE泡沫。两条路线都具有特定的优势。在使用化学发泡剂的情况下，需要对三步法每个步骤中发泡剂的性能有适当的了解，以确保形成细孔。这些孔必须在发泡步骤期间形成，仅意味着发泡剂不应在较早的步骤中分解。在本文中，将一些基于聚醚-酰胺嵌段共聚物的TPE泡沫与一些聚乙烯和聚丙烯泡沫进行了比较，显示了这些新型泡沫的机会。

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