摘要:
A fluid permeable composite structure having active particulate bonded together using a pressure-sensitive adhesive (PSA) polymer microparticulate. Use of the PSA polymer microparticulate to bond the active particulate together produces a bonded structure that, unlike previously-developed active bonded structures, is flexible and therefore can be conformed into a variety of shapes. The shaped structures may be used as gaseous filters in a wide variety of respirators.
摘要:
A porous sheet article comprising a self-supporting nonwoven web of polymeric fibers and at least 80 weight percent sorbent particles enmeshed in the web, the fibers having sufficiently greater elasticity or sufficiently greater crystallization shrinkage than similar caliper polypropylene fibers and the sorbent particles being sufficiently evenly distributed in the web so that the web has an Adsorption Factor A of at least 1.6×104/mm water. The articles have low pressure drop and can provide filter elements having long service life and an Adsorption Factor approaching and in some instances exceeding that of a packed carbon bed.
摘要:
A porous sheet article comprising a self-supporting nonwoven web of polymeric fibers and at least 80 weight percent sorbent particles enmeshed in the web, the fibers having sufficiently greater elasticity or sufficiently greater crystallization shrinkage than similar caliper polypropylene fibers and the sorbent particles being sufficiently evenly distributed in the web so that the web has an Adsorption Factor A of at least 1.6×104/mm water. The articles have low pressure drop and can provide filter elements having long service life and an Adsorption Factor approaching and in some instances exceeding that of a packed carbon bed.
摘要翻译:一种多孔片材制品,其包含聚合物纤维的自支撑非织造纤维网和至少80重量%的啮合在纤维网中的吸附剂颗粒,所述纤维具有足够大的弹性或比类似的卡普聚丙烯纤维足够大的结晶收缩率,并且吸附剂颗粒足够均匀 分布在网中,使得网具有至少1.6×10 4 / mm 2的水的吸附因子A. 制品具有低压降并且可以提供具有长使用寿命的过滤元件和吸附系数接近并且在某些情况下超过填充碳床的吸附系数。
摘要:
A pressure-sensitive adhesive polyacrylate polymer microparticulate obtainable by suspension polymerizing an aqueous mixture that comprises: (a) an acrylic acid ester of a nontertiary alcohol having 1 to 14 carbon atoms; (b) a polar monomer; (c) a styrene sulfonate salt; and (d) an amount of surfactant above the critical micelle concentration.
摘要:
A fluid permeable composite structure having active particulate bonded together using a pressure-sensitive adhesive (PSA) polymer microparticulate. Use of the PSA polymer microparticulate to bond the active particulate together produces a bonded structure that, unlike previously-developed active bonded structures, is flexible and therefore can be conformed into a variety of shapes. The shaped structures may be used as gaseous filters in a wide variety of respirators.
摘要:
A method is disclosed for the prophylactic treatment of mastitis in milk-producing animals. The method comprises dipping the teats of the animal into a composition comprising a film-forming polymer latex and a water-soluble polymer thickening agent in an aqueous medium. The composition has a thixotropic value of 15 to 1200 dynes/cm.sup.2 and an upper viscosity limit of 10 poise at a shear rate of 250 sec.sup.-1.