New sorbent sheet products are prepared comprising a coherent web of entangled blown fibers prepared by extruding liquid fiber-forming material into a high-velocity gaseous stream and an array of super absorbent polymeric particles dispersed within the web.

Sheet product containing sorbent particulate material

A superthin absorbent disposable product is provided having an absorbing layer containing superabsorbent and a wicking layer. The product is suitable for use in disposable diapers, sanitary napkins, incontinent pads, wipes and the like.

Superthin absorbent product

Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units. Such filter units can be placed in the stream of a mobile fluid and can remove a particular load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.

Filter medium and structure

A fibrous structure comprising a composite fiber matrix loaded with immobilized functional particulate and including void spaces forming tortuous flow paths, is provided. The particulate is beneficially distributed in the interior of the fibrous structure in three dimensions and fused to a low melting component of the composite fibers without substantially reducing the available surface area of the particulate. A filtration structure of a composite staple having a nylon sheath and a polyester core, with activated carbon particles bonded to the fiber matrix, and including a microfiber web located within the structure, is specifically disclosed.

Fibrous structures containing immobilized particulate matter

The invention features a clean room and a chemical air filter suitable for use in the air handling system of the clean room directly upstream of high-efficiency particulate air (HEPA) filters The chemical filter is of the pleated filter type comprising an air permeable, relatively thick web of non-woven fibrous carrier material of pleated form The web includes a matrix formed of a large multiplicity of synthetic fibers and is characterized in that activated carbon particles are distributed throughout the web, bound in the interstices of the matrix in a manner preventing loss to the air of particles in quantity substantially detrimental to the performance of the HEPA filter The activated carbon particles are of the type selected to remove the predetermined gas-phase contaminant from the air from the source The invention also features a non-off gassing filter casing that may easily be installed into existing clean room air handling systems

Clean room air filtering

A conjugate fiber of a thermoplastic synthetic organic polymer composed of a high melting polymer component and a low melting polymer component, said low melting polymer component having a melting point at least 40° C. lower than that of the high melting polymer component, and having adhered to its surface finely divided particles of an adsorbent. The fiber is a good filter having reduced pressure loss and increased adsorbing power. Fibrous materials and articles are made from these conjugate fibers.

Conjugate fiber, fibrous material and fibrous article made therefrom and process for production thereof

1373388 Conjugate fibres TEIJIN Ltd 23 Dec 1971 [24 Dec 1970 4 May 1971 11 June 1971] 60153/71 Heading B5B [Also in Divisions B1 and C1] A conjugate fibre comprises two components one having a melting point at least 40‹ C. above that of the other. Adhered to the surface of the lower-melting component are particles of an adsorbent material. Conjugate fibres exemplified have, as the lower-melting -component, polystyrene, polycaproamide, polyethylene or polypropylene. The higher melting component may be either polyethylene terephthalate or polycaproamide. Although side-by-side fibres may be cored the sheath core form is preferred with the sheath and core being concentric and the lower melting component being the sheath. The conjugate fibres are generally prepared by conventional melt-spinning techniques but in Example 18 polyethylene terephthalate is coated with polystyrene by [passing a tow of polyethylene terephthalate filaments througha solution of polystyrene and then drying the tow. The adsorbent may be applied to the filaments by sprinkling on to their surface after they have been spun and drawn in air or water. Alternatively the filaments may be passed through a dispersion of the adsorbent. The filaments may be formed into a fabric or moulded into an article before the adsorbent is applied. The adsorbent is then adhered to the lower melting component by heating the material to a temperature between the melting points of the components. Alternatively, the adsorbent may be blown on to the filaments during extrusion when they are at a temperature at which only the lower-melting component is molten. Adsorbent materials used are carbon black, silica, alumina, manganese, dioxide, cobaltous oxide, cuprous oxide and molecular sieve.

Kiyoji Katayama

Papers

Conjugate fiber, fibrous material and fibrous article made therefrom and process for production thereof

Thermoplastic polymer fibres