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AssigneeThe Procter & Gamble Company
InventorsDean V. Phan, Bart S. Hersko
Estimating the term…
Tissue paper webs useful in the manufacture of soft, absorbent products such as napkins, facial tissues, and sanitary tissues, and processes for making the webs. The tissue paper webs comprise papermaking fibers, a biodegradable quaternized amine-ester softening compound, a wetting agent, and a temporary wet strength resin. The process comprises a first step of forming an aqueous papermaking furnish from the above-mentioned components. The second and third steps in the basic process are the deposition of the papermaking furnish onto a foraminous surface such as a Fourdrinier wire and removal of the water from the deposited furnish. An alternate process involves the use of the furnish containing the aforementioned components in a papermaking process which will produce a pattern densified fibrous web having a relatively high bulk field of relatively low fiber density in a patterned array of spaced zones of relatively high fiber density.
A strong, soft, absorbent biodegradable tissue paper web comprising:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
The carbon skeleton being acyclic and saturated: having the hydroxy groups esterified by carboxylic acids having the esterifying carboxyl groups…
Containing elements other than carbon and hydrogen only: alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
Containing elements other than carbon and hydrogen only: nitrogen-containing compounds
Containing elements other than carbon and hydrogen only: carboxylic acids; Derivatives thereof
Term ended 9 Apr 2012 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates to tissue paper webs. More particularly, it relates to soft, absorbent tissue paper webs which can be used in sanitary tissue, facial tissue products, and paper napkins.
Paper webs or sheets, sometimes called tissue or paper tissue webs or sheets, find extensive use in modern society. Such items as paper towels, napkins, and facial tissues are staple items of commerce. It has long been recognized that three important physical attributes of these products are their softness; their absorbency, particularly their absorbency for aqueous systems; and their strength, particularly their strength when wet. Research and development efforts have been directed to the improvement of each of these attributes without deleteriously affecting the others as well as to the improvement of two or three attributes simultaneously.
Softness is the tactile sensation perceived by the consumer as he/she holds a particular product, rubs it across his/her skin, or crumples it within his/her hand. This tactile sensation is a combination of several physical properties. One of the more important physical properties related to softness is generally considered by those skilled in the art to be the stiffness of the paper web from which the product is made. Stiffness, in turn, is usually considered to be directly dependent on the dry tensile strength of the web.
While this specification concludes with claims particularly pointing out and distinctly claiming the subject matter regarded as the invention, it is believed that the invention can be better understood from a reading of the following detailed description and of the appended examples.
As used herein, the terms tissue paper web, paper web, web, and paper sheet all refer to sheets of paper made by a process comprising the steps of forming an aqueous papermaking furnish, depositing this furnish on a foraminous surface, such as a Fourdrinier wire, and removing the water from the furnish as by gravity or vacuum-assisted drainage, with or without pressing, and by evaporation.
As used herein, an aqueous papermaking furnish is an aqueous slurry of papermaking fibers and the chemicals described hereinafter.