Abstract: A nonwoven fabric having flow control properties suitable for use in a fluid absorbing article such as a diaper, incontinence pad, or the like; and a process for preparation thereof by utilizing unbonded carded staple fiber elements or webs having different average dpf values compiled in graduated order from high-to-low average dpf, then compressed and bonded to a desired constant fabric density.
Abstract: High loft durable nonwoven material comprising facing and base components and corresponding process for preparation thereof and process for obtaining by(a) forming and compiling a facing component comprising one or more facing web(s) of staple fiber and/or fibrillated film;(b) lightly bonding the formed and compiled facing webs, utilizing a low density bonding pattern having a small bonding area relative to the corresponding surface area of said facing component;(c) laying a web comprising staple fiber and/or fibrillated film onto the lightly bonded facing component under conditions favoring arrangement in general cross or transverse direction relative to machine direction of the facing component; and(d) bonding said cross or transversely laid web to form a base component to said facing component, utilizing a substantially greater bonding density then employed for said facing component, to obtain the desired nonwoven material.
Abstract: High strength spun melt fiber, preparation thereof utilizing threadline oxidative chain scission degradation of hot fiber spun from polymer component(s) having a broad molecular weight distribution in conjunction with a delayed quench step, and corresponding nonwoven material obtained therefrom.
Abstract: A method for preparing hydrophobic fiber for processing, inclusive of crimping, cutting, carding, compiling and bonding, without substantial loss in hydrophobic properties in the finished staple or corresponding nonwoven product through initial application of a surface modifier component comprising one or more of a class of water soluble compounds substantially free of lipophilic end groups and of low or limited surfactant properties.
Abstract: An efficient method for preparing nitrated glycerol glycol ether useful as a high energy plasticizer, by using as nitrator feed, the reaction products of an alkali metal bisulfate-catalyzed reaction of ethylene oxide and a stoichiometric excess of glycerol.
Type:
Grant
Filed:
December 24, 1987
Date of Patent:
May 10, 1994
Assignee:
Hercules Incorporated
Inventors:
Lawrence E. Carosino, Kenneth O. Hartman
Abstract: A stable chlorine-free solid rocket propellant composition containing a low energy binder component having an HEX value not exceeding about 0 cal/gm and comprising, in combination, a nitrate salt and/or phase stabilized nitrate salt as oxidizer component, a Mg/Al alloy of limited Mg content as a fuel component, at least one energetic plasticizer component, and a burn rate catalyst.
Type:
Grant
Filed:
December 27, 1991
Date of Patent:
December 21, 1993
Assignee:
Hercules Incorporated
Inventors:
Daniel J. Bradford, John R. Goleniewski
Abstract: A nonwoven fabric having flow control properties suitable for use in a fluid absorbing article such as a diaper, incontinence pad, or the like; and a process for preparation thereof by utilizing unbonded carded staple fiber elements or webs having different average dpf values compiled in graduated order from high-to-low average dpf, then compressed and bonded to a desired constant fabric density.
Abstract: A container providing controlled atmospheric storage of produce (i.e., fresh fruits, vegetables and flowers) to improve retention of product freshness by adjusting the carbon dioxide to oxygen ratio, for the storage of said produce, can be attained and maintained, thereby retarding premature maturation and spoilage. The environment is controlled by providing a microporous membrane panel of a uniaxially or biaxially oriented microporous polyolefin coated with a cured silicone elastomer, said panel being of limited carbon dioxide and oxygen permeance on an otherwise substantially impermeable container. The size of the area of the panel is a function of its permeance, the amount and respiration rate of the contents, and the ratio of carbon dioxide to oxygen desired.
Abstract: Biaxially oriented film is post-treated by an annealing process in a limited temperature range of 45.degree. C. to 120.degree. C. for various time periods based on the temperature for annealing in order to produce a film having less than a 0.2% shrinkage in the machine direction as measured at 51.7.degree. C. for 24 hours. This film has a wide range of uses, such as overwrapping film.
Abstract: A stable extrudable non-azide crash bag propellant composition for generating high quality nitrogen gas and a low temperature process for producing the same from an extrudable mass containing an effective amount of a cellulose-based binder.
Abstract: Method for air dispersion of filamentary type organic material from an initial compressed form comprising a component of a propellant and/or air-activated shell-like structure.An invention comprised of a plurality of compressed filamentary organic materials, a vehicle for storing and dispersing said materials and a method for effecting air dispersion of such materials.
Abstract: A method for imparting and retaining hydrophilicity and liquid strike-through properties within an essentially hydrophobic polyolefin-containing nonwoven material and the corresponding fiber, fibrillated film, and nonwoven product thereof, whereby essentially hydrophobic polyolefin-containing fiber or film is topically treated with an effective amount of one or more of a water soluble polyalkoxylated polydimethylsiloxane, an alkoxylated ricinolein with certain fatty acids, or corresponding hydrogenated derivatives thereof.
Abstract: Rosin esters are used to reduce the tendency of shaped articles made from polypropylene, especially fibers, to form malodorous decomposition products upon sterilization by gamma-irradiation. Other stabilizers normally used to prevent discoloration and degradation of polyolefins may also be present. Stabilized fibers are used for the manufacture of disposable medical products.
Abstract: Method for controlling delivery of by-products found in cigarette smoke by utilizing a cigarette filter element comprising one or more substrates treated with an effective amount of at least one of (A) zinc chloride, ferrous bromide, calcium bromide, lithium bromide, zinc thiocyanate, sarcosine hydrochloride, manganese sulfate, manganese acetate, magnesium chloride and magnesium acetate; alone or combined with (B) glyceryl triacetate; plus corresponding treated filter element(s) and cigarette(s) utilizing such filter elements(s).
Abstract: Method for air dispersion of filamentary type organic material from an initial compressed form comprising a component of a propellant and/or air-activated shell-like structure.An invention comprised of a plurality of compressed filamentary organic materials, a vehicle for storing and dispersing said materials and a method for effecting air dispersion of such materials.
Abstract: A method and corresponding product whereby hydrophobic polyolefin-containing nonwoven materials are provided with sustainable hydrophilic properties for rewet purposes by incorporation into the appropriate spin melt composition an effective amount of an alkoxylated fatty amine in optional combination with up to 60% by weight of primary fatty acid amide.
Abstract: A warp resistant tile and method for preparation thereof in which a primary facing layer is secured to a tile backing layer which comprises a laminate having(A) a characterizing layer of predetermined weight, bulk, and strength, this layer and being complementary to the primary facing, and to(B) a thin flexible base layer.