Abstract:
The present invention provides an electret sheet which can maintain a high generated voltage even if a large amount of pressure has been applied. Disclosed is an electret sheet of the present invention including an electrically charged propylene-based resin foam sheet which contains a crosslinked propylene-based resin that includes a propylene-α-olefin random copolymer having a weight average molecular weight of 370,000 to 420,000 at a proportion of 60% by weight or more, and has a gel fraction of 30% to 50% by weight, and in which the average thickness is 90 to 150 μm, and the average number of foam cells in the thickness direction is 2 to 4 cells.
Abstract:
The present invention relates to a method for preparing a porous scaffold for tissue engineering. It is another object of the present invention to provide a porous scaffold obtainable by the method as above described, and its use for tissue engineering, cell culture and cell delivery. The method of the invention comprise the steps consisting of a) preparing an alkaline aqueous solution comprising an amount of at least one polysaccharide and one cross-linking agent b) freezing the aqueous solution of step a) c) sublimating the frozen solution of step b) characterized in that step b) is performed before the cross-linking of the polysaccharide occurs in the solution of step a).
Abstract:
The present application relates to a thermally expandable composition containing an endothermic chemical blowing agent, to shaped bodies containing said composition and to a method for sealing and filling cavities in components, for strengthening or reinforcing components, in particular hollow components, and for bonding movable components using shaped bodies of this type.
Abstract:
The present invention relates to a process for the processing of perfluoropolymer materials, and to the use of the resultant products in different potential applications, such as in the medical device field.
Abstract:
A method for continuously preparing solvent-free open-cell and closed-cell polyimide foams, firstly, one or a few of dianhydrides dissolve in or suspend in the polyhydric alcohol and form the precursor A. All kinds of additives dissolve in the polyhydric alcohol and form the precursor B. The aromatic isocyanates with different structure mix well and form the precursor C. Finally the three precursors are mixed foaming by one-step, after solidify, the polyimide foams are obtained with advantage performance. The method does not utilize the volatile solvent that does not participate in the reaction, therefore not existing the process of removing the solvent, it can continuously produce with the double-side heat conveyor belt. CO2, the main gas producing in the reaction, causes the system to foam, thus there is no cost on the solvent recovery and it reduces the environment contamination.
Abstract translation:一种连续制备无溶剂开孔和闭孔聚酰亚胺泡沫的方法,首先,一种或几种二酐溶解或悬浮在多元醇中并形成前体A.各种添加剂溶解在多元醇中, 形成前体B.具有不同结构的芳族异氰酸酯混合良好并形成前体C.最后三种前体通过一步混合发泡,固化后,获得了优势性能的聚酰亚胺泡沫。 该方法不使用不参与反应的挥发性溶剂,因此不存在除去溶剂的过程,可以用双面传热带连续生产。 CO 2是反应中产生的主要气体,导致系统发泡,因此溶剂回收没有成本,并且减少了环境污染。
Abstract:
The present invention provides a composition for sponge rubber including 2 to 6 parts by mass of polyethylene, 0.5 to 12 parts by mass of baking soda as a foaming agent, and a sulfur vulcanizing agent with respect to 100 parts by mass of an ethylene-αolefin-nonconjugated diene copolymer.
Abstract:
The foamable composition according to the present invention comprises a copolymer of ethylene, an α-olefin and a non-conjugated diene, a blowing agent, a crosslinking agent, a catalyst and a reaction suppressor, wherein in the foamable composition, the storage elastic modulus at 23° C. as measured by a viscoelasticity measuring apparatus is 2×104 Pa or lower, and the storage elastic modulus after the foamable composition is held at 115° C. for 200 seconds is 5×104 Pa or higher; thereby, a foam body having a low expansion ratio, a low compression strength and a high cushioning property can be produced.
Abstract:
Disclosed herein are polysilsesquioxane based anti-reflective coating (ARC) compositions, methods of preparation, and methods of deposition on a substrate. In embodiments, the polysilsesquioxane of this disclosure is prepared in a two-step process of acid catalyzed hydrolysis of organoalkoxysilane followed by addition of tetralkoxysilane that generates silicone polymers with >40 mol % silanol based on Si-NMR. These high silanol siloxane polymers are stable and have a long shelf-life in the polar organic solvents at room temperature. Also disclosed are low refractive index ARC made from these compositions with and without additives such as porogens, templates, Si—OH condensation catalyst and/or nanofillers. Also disclosed are methods and apparatus for applying coatings to flat substrates including substrate pre-treatment processes, coating processes including flow coating and roll coating, and coating curing processes including skin-curing using hot-air knives. Also disclosed are coating compositions and formulations for highly tunable, durable, highly abrasion-resistant functionalized anti-reflective coatings.
Abstract:
A physically crosslinked, closed cell continuous multilayer foam structure comprising at least one polypropylene/polyethylene coextruded foam layer is obtained. The multilayer foam structure is obtained by coextruding a multilayer structure comprising at least one foam composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure.