摘要:
The present invention relates to a process for the production of coated textiles in which a textile substrate is firstly brought into contact with an aqueous dispersion comprising at least one inorganic salt and at least one modified cellulose, afterwards it is brought in contact with an aqueous dispersion comprising a polymer selected from polyacrylate or polybutadiene and at the end this polymer is precipitated.
摘要:
A method of making an electret article, from a polymeric article that has a zeta potential of greater than or less than -7.5 millivolts. The article is charged by contacting it with an aqueous liquid that has a pH and conductivity as follows: (i) if the article has a zeta potential of -7.5mV or less, then the contacting liquid has pH greater than 7 and a conductivity of 5 to 9,000 microSiemens per centimeter; and (ii) if the article has a zeta potential of greater than -7.5mV, then the contacting liquid has a pH of 7 or less and a conductivity of 5 to 5,500 microSiemens per centimeter. An electret article made in this manner can provide improved electret performance, particularly in electret filtration articles.
摘要:
The invention relates to a textile complex (1) intended to be used as reinforcing layer for the manufacture of three-dimensional composite parts by resin injection or infusion processes, comprising at least one fibre-based reinforcing layer (2). The textile complex is characterized in that it includes, on one of its bases, a fixing layer (3) based on a thermoplastic material having an almost zero cold elongation and a melting point below the melting point of the other materials of the complex, and in that said fixing layer (3) is apertured in order to allow the passage of the injected or infused resin. The invention also relates to a process for manufacturing a flexible preform, during which the shape of the reinforcement is maintained by the presence of a fixing layer fastened to the reinforcement in a preform mould.
摘要:
L'invention concerne un procédé d'imprégnation de produit en matériau fibreux formé à partir d'une nappe continue (22), le procédé comprenant au moins une première étape de découpe d'une zone spécifique (24) de ladite bande continue (22) et au moins une seconde étape d'application d'un produit d'imprégnation sur ladite zone spécifique (24), les première et seconde étapes étant effectuées de manière simultanée ou quasi simultanée.
摘要:
Membranes suitable for microfiltration, ultrafiltration (UF) and nanofiltration (NF) filters are provided. Such membranes may include a nanofibrous scaffold, optionally in combination with a non-woven substrate and/or a coating of a polymer and a functionalized nanofiller. Suitable membranes may also include a coating of a polymer and a functionalized nanofiller on a substrate, which can include a non-woven membrane, a nanofibrous scaffold, or both.