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    • 3. 发明申请
    • PIEZOELECTRET FILM PRODUCTION METHOD
    • 压电薄膜生产方法
    • WO2017216110A1
    • 2017-12-21
    • PCT/EP2017/064294
    • 2017-06-12
    • TARKETT GDL
    • MAERTENS, ChristopheSIMON, Jean-Yves
    • B29C44/56B29C59/14B29C44/34B29K23/00
    • B29C44/5627B29C44/3446B29C44/505B29C44/507B29C44/5681B29C59/10B29K2023/12
    • A method of producing a piezoelectret film comprises feeding polymer material (14) into a plastic extruder (12) and admixing a blowing agent (23) as a supercritical fluid by injection into the plastic extruder (12). The polymer material (14) enriched with the blowing agent (23) is extruded through a die (24). Upon depressurization at the die (24), the blowing agent (23) expands the polymer material (14) to form a foamed sheet (26). The foamed sheet (26) is then introduced into a continuous sheet production line (28), in which the foamed sheet (26) is subjected to corona charging treatment creating a separation of electric charges in pores of the foamed sheet (26) and in which the foamed sheet (26) is provided with a conductive layer (36, 38) on each face.
    • 制备压电驻极体膜的方法包括将聚合物材料(14)供入塑料挤出机(12)中,并通过注入到塑料挤出机(12)中混合作为超临界流体的发泡剂(23) 。 富含发泡剂(23)的聚合物材料(14)通过模头(24)挤出。 在模具(24)处减压时,发泡剂(23)使聚合物材料(14)膨胀以形成发泡片材(26)。 然后将发泡片材(26)引入到连续片材生产线(28)中,其中发泡片材(26)进行电晕带电处理,在发泡片材(26)的孔隙中产生电荷分离,并且 其中发泡片材(26)在每个面上设有导电层(36,38)。
    • 6. 发明申请
    • ULTRA-FLEXIBLE PIPE INSULATION
    • 超柔软管绝缘
    • WO02042679A1
    • 2002-05-30
    • PCT/NL2000/000859
    • 2000-11-23
    • F16L59/14B29C44/50B29C47/00B29K23/00B29K105/04B29L23/00C08F2/00C08J9/12C08J9/14F16L59/02
    • C08J9/14B29C44/507C08J2201/03C08J2323/06F16L59/02
    • The present invention relates to pipe insulation made from a polyolefin thermal insulation foam which is made by extruding, using a physical blowing agent, a foam composition comprising 77-99 % by weight of a metallocene polyethylene, 5-18 % by weight of a flame extinguisher, 3-8 % by weight of a cell stabilizer and 0-5 % by weight of other usual foam additives. The invention further relates to a method for preparing a physically foamed polyolefin thermal insulation foam and to the foam prepared therewith. The foam is very flexible and as a result the pipe insulation is particularly suitable for the thermal insulation of pipes for split air conditioning, district heating, solar energy exploitation and the process industry, even when it regards thin and/or twisting pipes. The pipe insulation can be recycled well.
    • 本发明涉及由聚烯烃绝热泡沫制成的管道绝缘体,其通过使用物理发泡剂挤出泡沫组合物制成,泡沫组合物包含77-99重量%的茂金属聚乙烯,5-18重量%的火焰 灭火器,3-8重量%的电池稳定剂和0-5重量%的其它通常的泡沫添加剂。 本发明还涉及一种用于制备物理发泡聚烯烃保温泡沫的方法及其制备的泡沫。 泡沫是非常灵活的,因此管道绝缘特别适用于分体式空调,区域供热,太阳能开采和工艺工业管道的隔热,即使是薄型和/或扭转管道。 管道绝缘可以循环利用。