Abstract:
Discontinuous fibers (16) are entrained in a gaseous medium and coated while entrained with a substantially continuous coating of a binder material. Plural coatings of various binder materials may be applied to the entrained fibers (16). Also, one or more solid particulate materials may be adhered to the fibers (16) by the binder material as the binder material dries. The binder material may be heat bondable and mixed with other fibers for use in producing a wide variety of products.
Abstract:
Discontinuous fibers are coated with a binder material with the binder material adhering the fibers to super absorbent particles. Fibers in the product are substantially unbonded except to the super absorbent particles. The binder may be present at an amount which is sufficient to substantially continuously coat the fibers. Plural coatings of various binder materials may be used. The binder material may be heat fusible or heat curable and the treated fibers mixed with other fibers for use in producing a wide variety of products.
Abstract:
Fibers are at least partially coated with a dye containing binder. The fiber product may be comprised of substantially unbonded fibers. Plural coatings of various binder materials may be applied to the entrained fibers. Also, one or more solid particulate materials may be adhered to the fibers by the binder material as the binder material dries. The binder material may be heat fusible or heat curable and fibers treated with this dye containing binder material may be mixed with other fibers for use in producing a wide variety of products. Various colors and shadings can be achieved by mixing different colored binder coated fibers and by mixing the treated fibers with untreated fibers.
Abstract:
Cellulose fibers are entrained in a gaseous medium in a loading zone (20) of a fiber treatment conduit (24) and sized while entrained with a sizing material. In a material application zone (30), blower (26) is capable of moving a gaseous medium at a velocity and volume sufficient to entrain the fibers which have been entrained in the loading zone (20). The sizing material may comprise a nonaqueous solution of alkyl ketene dimer or other sizing material. Also, immersions of fibers in such a nonaqueous sizing solution is another approach for sizing fibers.
Abstract:
A liner for helmets, hats, caps or other head coverings has a body with a central section (18) and tapered end sections (20, 22). The body includes liquid absorbing material and is releasably secured to the head covering for easy replacement. The liners are typically disposable and may be formed with a core (40) of thermoplastic containing other fibers sandwiched between facing and backing sheets (42, 44). The edges (24, 25) and transversed sections (26, 28) of the body may be densified. Optionally, the liner may be cut in these transverse densified areas to adjust its length.
Abstract:
Articles (102) are formed of materials which have at least one layer (12) comprising a mixture of thermoplastic and other fibres. This latter layer (12) may be thermobonded together and then densified along at least a section of the eventual peripheral edge margin of an article (102) to be formed from the material. Thermoplastic material containing cover sheets (24, 56) may also be secured to the core (12) and densified in this manner. The entire eventual peripheral edge margin of the article (102) is typically densified. The material is cut within the densified region or slightly outside the densified region to provide a soft peripheral edge. Absorbent materials may be thermobonded within the layer (12) and surrounded by a densified edge to fix them within the article (102). The composite materials are used in manufacturing infant car seat liners and other articles. In addition, sections of the material may be densified and provided with weakened areas, such as perforations, to enable users to selectively separate the articles along the perforations.
Abstract:
The present invention is a composite pultruded product and the method for its manufacture. The product is made with a plurality of longitudinal glass roving strands. In addition, a cellulosic mat is used in association with the roving. The mat serves as a filler, or reinforcing filler, to ensure uniform resin distribution within the product even when the glass content is significantly reduced. The method can be carried out on convention pultrusion equipment with little or no modification. The cellulose fiber mats may be either air laid or wet laid and should have an ultimate moisture of 1% or less before being incorporated into the pultruded product.
Abstract:
The present invention is a method of bonding a fibrous wet laid nonwoven fabric-like product using bacterial cellulose as a binder. The bacterial cellulose most useful for the invention is the type formed in an agitated culture. Microorganisms of the genus Acetobacter which are genetically adapted to be good cellulose producers under agitated conditions are preferred cellulose producers. From 1-30 % of the bacterial cellulose may be added to a watter slurry of other sheet forming fibers as a binder. Preferably 20 % or less bacterial cellulose is used since higher amounts retard drainage rates significantly. Bacterial cellulose conveys many desirable properties such as excellent hydrophilicity with low air porosity and high tensile index. It may be used in many cases as a total replacement for the latex binders now used for manufacture of nonwoven fabrics. Bacterial cellulose is especially well adapted for the manufacture of pattern bonded sheets.
Abstract:
Method of sizing paper and, in particular, paper made under neutral to alkaline conditions at least as high as 10.5. The papermaking stock is first treated with a polycationic material to provide sizing receptive sites uniformly distributed over the fiber surface. The presence of the anchoring points is critical to the later redistribution of the sizing material in the dryer section of the paper machine. The sizing material is then added to the slurry. This is then brought down onto the fibers by addition of a small amount of a size precipitant such as alum. The sizing molecule should have a hydrophilic portion with two hetero atoms forming a bidentate analog structure. This must have a pK in water of 6.0 or higher and a vapor pressure preferably at least 0.0006 mm Hg at 60 DEG C. The polycationic material provides anchoring/orienting sites on the fiber to which the small globules of sizing attach when the emulsion is broken by the precipitant. Sizing will develop in the dryer section of the paper machine, presumably by vapor phase redistribution of sizing from the attached globules to unfilled sites where an anchoring point is present. Alkyl and alkenyl substituted catechols, beta-diones, hydrozamic acids and imides are among the new classes of sizing materials disclosed.
Abstract:
Elastic leg diaper (2') and a method and equipment for its manufacture. A preferred form of the diaper uses for the entire moisture impermeable backing sheet (4) an elastomeric material of the type that is heat unstable and relatively inelastic in its unshrunk form and stable and relatively elastic in its heat shrunk form. Numerous materials of this type are available. Included among them are block copolymers which include a rubbery material as one component, polyurethanes, and irradiated polyethylene. Diapers (2') made using one of these materials as a backing sheet (4) can be conventionally assembled. After assembly, the marginal areas, (10, 12) which may be either or both of the transverse and longitudinal margins, may be heated to a sufficient temperature for shrinkage to occur in the backing sheet (4).