摘要:
An impregnated fibrous veil comprises a nonwoven fibrous veil including a prebinder and reinforcing fibers. The fibers are selected from a group consisting of glass fibers, ceramic fibers and mixtures thereof. The nonwoven fibrous veil has at least one face impregnated with a surface finish formulation. The surface finish formulation includes about 50 to about 95 weight percent filler, about 5 to about 50 weight percent binder and about 0 to about 10 percent optical brightener.
摘要:
A composite part made from a sheet molding compound is disclosed as having improved characteristics over traditional sheet molding compound composite parts. The fibrous material is introduced as a veil layer adjacent a paste layer, the veil flows well during the molding process. The improved flow and surface characteristics of a composite part are attributed to the elongation of the veil during molding and to the improved filling capabilities.
摘要:
A process for forming thermoplastic composites that uses wet use chopped strand glass is provided. Wet reinforcement fibers such as wet chopped strand glass fibers are opened by passing the fibers consecutively through a first opener, a condenser, and, optionally, a second opener. The opened reinforcement fibers are mixed with a resin and transferred to a first sheet former. The resin is preferably polypropylene fibers. An optional second sheet former may be used to form a final composite having high structural integrity. The resulting sheet may be optionally passed through a needle felting machine for mechanical strengthening. The sheet is then passed through a thermal bonder to thermally bond the reinforcement glass fibers and resin. The composite product that exits the thermal bonder can be subsequently used as a reinforcement in a molding process to produce composite articles.
摘要:
A method is provided for forming a wet-laid nonwoven glass fiber mat comprised of a plurality of bundles of fibers. The method includes the steps of adding chopped fibers to a water slurry containing a sufficient amount of a suitable hydrophobic agent to cause the fibers to form a plurality of bundles. The fibers are then formed into a mat which may be used in a number of reinforcement applications. A method is also provided for modifying the components in the water slurry to produce mats comprising either bundles of fibers or dispersed fibers.
摘要:
A non-woven fiber mat for lead-acid batteries is provided. The non-woven fiber pasting mat includes glass fibers coated with a sizing composition; a binder composition; and one or more additives. The additives reduce water loss in lead-acid batteries.
摘要:
A coated insulation product with a reduced fluorinated blowing agent concentration, while maintaining acceptable thermal properties (e.g., a 180-day R/in value of at least 4.8), is disclosed. The coated insulation product includes a foam product formed from a foamable composition comprising: a matrix composition; and a blowing agent composition comprising less than 3.5 wt. % of a fluorinated alkene, based on a total weight of the foamable composition. The foam product is coated with 3 g/m2 and 225 g/m2 of a barrier coating composition on at least one surface. The barrier coating composition includes: 40 wt. % to 99.9 wt. % of a barrier polymer having a minimum degree of crystallinity of 10%; and 0.01 wt. % to 60 wt. % of at least one additive.
摘要:
A clad cellular glass block and a passive fire suppression system incorporating clad cellular glass blocks are disclosed. The system is comprised of segments of cellular glass block including a cladding material that comprises an integrated connector flange. Adjacent cellular glass blocks in a reservoir can be interlocked to create a passive barrier the helps to reduce the damage or risks associated with a liquid hydrocarbon spill.
摘要:
An acoustically insulated machine including a source of noise positioned within a housing, a first insulation member positioned within the housing and including a first porous sound absorbing layer and a first dense layer, and a second insulation member positioned within the housing and including a second porous sound absorbing layer and a second dense layer. The first insulation member being is positioned closer to the internal source of noise than the second insulation member and the first insulation member being spaced apart from the second insulation member such that an air gap is formed between the first insulation member and the second insulation member.
摘要:
Methods for coating a cellular glass insulation material and a coated cellular glass insulation system for insulating the roof of a structure. The method comprises applying a coating system to at least one surface of a cellular glass block, the coating system comprising a first coating and a second coating, wherein the coating system provides durability and prevents water vapor intrusion. The coated cellular glass insulation system is comprised of blocks of coated cellular glass insulation and a membrane.