An interlining material comprising a web of non-woven fibers, said web having a first zone having distributed uniformly therein a binder, said first zone disposed proximate to but not in contacting relationship with a second zone having distributed uniformly therein a binder, the binding characteristics of said first zone being distinctly different from the binding characteristics of said second zone, said zones being interconnected by an intermediate zone, said intermediate zone containing a mi...

A hollow impregnation ring for coating fibers with a binder, the ring having a slot thru which the binder flows onto the fibers. The pressure of said binder within said ring controlling a seal and the flow of said binder from said slot.

A method for sealing graphite plates formed from mechanically processed graphite sheets of exfoliated graphite particles is provided. The graphites sheets are infused with a sealant to fill about 90 volume percent of the pores contained in the sheet. Upon curing the sealant, a substantially gas impermeable graphite plate is provides. Such a plate is useful in fuel cell construction.

The invention provides an in-line method of impregnating a porous article, particularly a metal casting, which comprises placing the article on a support, placing a cover thereover in sealing relation with support to define an impregnation chamber, applying a reduced pressure to the cover at the upper part thereof, admitting impregnant to the chamber until it at least covers the pores, allowing the pressure to rise to substantially atmospheric, removing excess impregnant from the chamber, and re...

This invention relates to the impregnation of rigid porous articles, particularly metal castings. In its preferred form the impregnant is a liquid mixture of monofunctional (meth)acrylic ester and a relatively small proportion of polyfunctional (meth)acrylic ester to provide a cross linked product on curing and to facilitate washing of the casting with water and an emulsifier. A peroxy or other free radical catalyst such as AZBN is associated in the impregnant with an inhibitor such as a hydroqu...

A process of making a fiber-reinforced polymeric material comprises sliding a fiber bundle over an arcuate support surface (2) in the line of the arc, and injecting into the bundle a molten or liquid polymer through a plurality of slots (4) in the surface, each slot being transverse to the bundle. The process allows effective impregnation of materials, at relatively high production speed and low capital costs.

An apparatus for fiber impregnation for use in a fiber placement system is disclosed. Resin is impregnated in the fiber rovings as they pass through a manifold. The manifold includes grooves for the fibers to travel, a reservoir to receive the resin and channels for the resin to flow to the individual fibers for impregnation. A control system measures and monitors the fiber speed and then mixes, pumps and delivers the desired quantity of resin to the tows for impregnation.

A body, or stack of bodies, made of timber or of other organic fluid-permeable material is impregnated with an impregnant by introducing the body or stack into a receptacle of fluid-impermeable material through an opening therein, the flexible receptacle being supported by and secured (e.g. by springs) to a substantially rigid structure in such a way that the receptacle is held open for the introduction through said opening of the body or stack. The opening in the receptacle is sealed to form a ...

The present invention relates to a method and a device for impregnating fibrous material such as, for example, fiber bundles, fiber strands, woven textiles or fiber mats, in which an impregnating agent is introduced into the spaces in the fibrous material, and the individual fibers are surrounded and/or soaked through, wherein the supply of impregnating agent takes place via apertures in a supply body over which the fibrous material is moved, wherein the device is provided with a supply body wit...

The present invention relates to a process of using steam to achieve simultaneous impregnation and drying of lignocellulosic material to improve the strength of lignocellulosic material and to reduce the number of serial processing steps. The steam may be either indigenously generated by way of a heated press or heated nip, or the steam may be externally applied.