3844results about "Special paper" patented technology

A process for making absorbent cellulosic paper products such as sheet for towel, tissue and the like, includes compactively dewatering a nascent web followed by wet belt creping the web at an intermediate consistency of anywhere from about 30 to about 60 percent under conditions operative to redistribute the fiber on the belt, which is preferably a fabric. In preferred embodiments, the web is thereafter adhesively applied to a Yankee dryer using a creping adhesive operative to enable high speed transfer of the web of intermediate consistency such as a poly(vinyl alcohol)/polyamide adhesive. An absorbent sheet so prepared from a papermaking furnish exhibits an absorbency of at least about 5 g/g, a CD stretch of at least about 4 percent, and an MD/CD tensile ratio of less than about 1.1, and also exhibits a maximum CD modulus at a CD strain of less than 1 percent and sustains a CD modulus of at least 50 percent of its maximum CD modulus to a CD strain of at least about 4 percent. Products of the invention may also exhibit an MD modulus at break 1.5 to 2 times their initial MD modulus.

Apparatus and method for producing absorbent structures with absorbent layers with channel(s) without absorbent material, using a first moving endless surface with specific raised strip(s) and a second moving endless surface with specific mating strip(s).

A novel paper article, a method of making a paper product, and an embossing roll are disclosed for providing a paper surface region having a minority of fiber to fiber bonds broken in the paper surface region to a depth less than about 0.02 mm from the paper surface. In one aspect, the roughened embossing roll includes protuberances or depressions sized at less than about 0.1 mm. In one aspect, the roughened embossing roll includes protuberances or depressions adapted to produce paper product surface deformations in the paper surface, wherein the paper product surface deformations are invisible to an unaided human eye. The present invention provides a paper product having higher perceived softness while maintaining tensile strength.

The invention concerns a pigment, filler or mineral containing a natural calcium carbonate, treated with one of more providers of H3O<+> ions and gaseous CO2, allowing a reduction in the weight of paper for a constant surface area without loss of physical properties when it is used as a pigment or coating filler for the said paper. In particular, the invention concerns a pigment, filler or mineral containing a natural calcium carbonate or dolomite or mixtures of talc and calcium carbonate, of kaolin and carbonate or carbonate alone or in combination with natural and/or synthetic fibers or similar, treated with one or more medium-strong or strong providers of H3O<+> ions in the presence of gaseous CO2. Applications are particularly in the paper industry, obtaining in particular good sheet properties i.e. a reduction its weight for a given surface area.

A water non-dispersible polymer microfiber is provided comprising at least one water non-dispersible polymer wherein the water non-dispersible polymer microfiber has an equivalent diameter of less than 5 microns and length of less than 25 millimeters. A process for producing water non-dispersible polymer microfibers is also provided, the process comprising: a) cutting a multicomponent fiber into cut multicomponent fibers; b) contacting a fiber-containing feedstock with water to produce a fiber mix slurry; wherein the fiber-containing feedstock comprises cut multicomponent fibers; c) heating the fiber mix slurry to produce a heated fiber mix slurry; d) optionally, mixing the fiber mix slurry in a shearing zone; e) removing at least a portion of the sulfopolyester from the multicomponent fiber to produce a slurry mixture comprising a sulfopolyester dispersion and water non-dispersible polymer microfibers; and f) separating the water non-dispersible polymer microfibers from the slurry mixture. A process for producing a nonwoven article is also provided.

The invention relates to a method (100) for the production of an overlay, in particular for laminates. For this, firstly an overlay base paper (10) is impregnated in the usual manner and is coated on one side with a resin/coarse corundum application. In order to endow the overlay with additional characteristics, such as for example chafe resistance on the surface, in a further wet-in-wet application step a coating substance (29) is applied on the opposite side and is dosaged by a wiper (31).

Fabric-creped absorbent sheet has an MD bending length of about 3.5 cm or more as well as an absorbency of about 3 g/g or more. The sheet is preferably produced without through drying or dry creping and is a low-dust product especially suitable for automatic towel dispensers.

A security paper indicates exposure to a solvent by a solvent resistant color signal. A metal mordant dye first co-reactant and a mordant dye second co-reactant form an organic solvent-insoluble colored reaction product when the paper is washed with an organic solvent. The metal mordant dye first co-reactant and a mordant dye second co-reactant are chemically isolated from each other so as to prevent the coordinate covalent bond from forming until the paper is washed with an organic solvent. The chemical isolation can be effected by encapsulation or other physical separation of the co-reactants. The organic solvent-insoluble colored reaction product, once formed, remains entrapped in the web when the paper is washed with an organic solvent. The chemical isolation prevents the organic solvent-insoluble colored reaction product from forming upon the application of pressure alone to the paper.

Fabric-creped absorbent sheet has an MD bending length of about 3.5 cm or more as well as an absorbency of about 3 g/g or more. The sheet is preferably produced without through drying or dry creping and is a low-dust product especially suitable for automatic towel dispensers.

The present invention relates to a composition for maintenance of bone health or prevention, alleviation and/or treatment of bone disorders. It also relates to the use of the composition in the manufacture of a nutritional product, a supplement, a treat or a medicament; and a method of promoting bone growth or for the maintenance of bone health, which comprises administering an effective amount of the composition.

An improved water resistant gypsum board is made by adding an aqueous wax emulsion containing a cationic surfactant to an aqueous slurry containing calcium sulfate and host particles at a slurry temperature which maintains calcium sulfate hemihydrate crystals. The wax emulsion is stable at the temperature of slurry which maintains the calcium sulfate hemihydrate. The slurry is then dewatered and rehydrated to form a gypsum board and dried at a temperature to melt the wax.

Cellulose nanofilaments from cellulose fibers, a method and a device to produce them are disclosed. The nanofilaments are fine filaments with widths in the sub-micron range and lengths up to a couple of millimeters. These nanofilaments are made from natural fibers from wood and other plants. The surface of the nanofilaments can be modified to carry anionic, cationic, polar, hydrophobic or other functional groups. Addition of these nanofilaments to papermaking furnishes substantially improves the wet-web strength and dry sheet strength much better than existing natural and synthetic polymers. The cellulose nanofilaments produced by the present invention are excellent additives for reinforcement of paper and paperboard products and composite materials, and can be used to produce superabsorbent materials.

An improved method of controlling build-up of adhesive coating on a Yankee drying cylinder preferably includes intermittently: (a) increasing the add-on rate of resinous adhesive to the drying cylinder substantially above the steady-state add-on rate; (b) segregating the absorbent sheet product produced while the add-on rate of resinous adhesive to the drying cylinder is elevated above the steady-state add-on rate from absorbent sheet product accumulated during steady-state operation; and (c) while the add-on rate of resinous adhesive to the drying cylinder is increased above the steady-state add-on rate, stripping at least a portion of the adhesive coating from the drying cylinder with a cleaning doctor.

Compositions and methods are provided for the sizing of paper, to enhance the quality of images printed thereon. The novel sizing compositions contain as a sizing agent a mixture of a polyacid and a polybase. When applied to a paper substrate, such as in an internal or external sizing process, the sizing compositions result in a sized paper substrate that provides high quality printed images when printed with an ink containing a reactive dye having ionizable and/or nucleophilic groups capable of reacting with the sizing agent. Images printed on a paper substrate coated with the sizing compositions of the invention are bleed-resistant, water-resistant (e.g., water-fast), and/or are characterized by an enhanced chroma and hue.

The present invention relates to a method of producing a cellulose based paper, the paper itself and the use thereof where the paper exhibits enhanced mechanical properties. The method involves providing a suspension of well dispersed modified cellulose at a low concentration. The properties and the chemical structure of the paper make it suitable for in vivo applications such as implant material.

The present invention relates to a method for reducing the polymer and bentonite requirement in papermaking wherein medium and high molecular weight polymers are reacted with bentonite. Further, mechanical shearing of the furnish after polymer addition is not required.

The present invention relates to compositions comprising quaternary ammonium compounds and essential oils or individual constituents thereof which exhibit enhanced antimicrobial effects. Such combinations may be comprised in lotions, gels, creams, soaps, etc. for application to skin or mucous membranes. The invention is based, at least in part, on the observation that synergistic antimicrobial effects are achieved with combinations of essential oils or individual constituents thereof and low concentrations of quaternary ammonium compounds.

In a method for manufacturing a belt and a belt for use in the production of bulk tissue and towel, and of nonwoven articles and fabrics, a polymeric resin material is applied onto the surface of a base substrate in a precise predetermined pattern which is to be imparted onto products manufactured with the belt. The polymeric resin material is deposited in droplets having an average diameter of 10μ (10 microns) or more. The polymeric resin material is then set by means appropriate to its composition, and, optionally, may be abraded to provide the belt with a uniform thickness, and a smooth, macroscopically monoplanar surface.

This invention relates generally to a method for growing carbon fiber from single-wall carbon nanotube (SWNT) molecular arrays. In one embodiment, the present invention involves a macroscopic molecular array of at least about 106 tubular carbon molecules in generally parallel orientation and having substantially similar lengths in the range of from about 50 to about 500 nanometers. The hemispheric fullerene cap is removed from the upper ends of the tubular carbon molecules in the array. The upper ends of the tubular carbon molecules in the array are then contacted with a catalytic metal. A gaseous source of carbon is supplied to the end of the array while localized energy is applied to the end of the array in order to heat the end to a temperature in the range of about 500° C. to about 1300° C. The growing carbon fiber is continuously recovered.

A method of forming a structured web including the steps of providing a fiber slurry through a headbox to a nip formed by a structured fabric and a forming fabric and collecting fibers from the fiber slurry in at least one valley of the structured fabric.

Tissue products are disclosed having desirable strength, stretch and softness properties. In particular, the tissue products exhibit relatively high strength while still having a relatively low stiffness and a significant amount of stretch. The tissue webs generally comprise uncreped through-air dried webs. In accordance with the present disclosure, the webs are formed in a through-air drying process in which the transfer fabric and the through-air drying fabric are both textured fabrics having a substantially uniform high strain distribution in the cross-machine direction. Various improvements in properties in the cross-machine direction are exhibited by deforming or molding a tissue web against one or more of the fabrics during the tissue making process.

The present invention relates to a soft, thick, single-ply tissue and to a process for the manufacture of such tissue product having a basis weight of at least about 15 lbs./3,000 square foot ream and having low sidedness, said tissue exhibiting: a specific total tensile strength of between 40 and 75 grams per 3 inches per pound per 3000 square feet ream, a cross direction specific wet tensile strength of between 2.75 and 7.5 grams per 3 inches per pound per 3000 square feet ream, the ratio of MD tensile to CD tensile of between 1.25 and 2.75, a specific geometric mean tensile stiffness of between 0.5 and 1.2 grams per inch per percent strain per pound per 3000 square feet ream, a friction deviation of less than 0.225, and a sidedness parameter of less than 0.275.

The present invention is directed to smoking articles having reduced carbon monoxide delivery are described. A carbon monoxide reducing agent is incorporated into the smoking article in order to reduce carbon monoxide levels in mainstream smoke. The carbon monoxide reducing agent may be, for instance, in metal oxide or in metal carbonate. The carbon monoxide reducing agent may be incorporated into a wrapper and/or into a column of smokable filler that are used to construct the smoking article.

Compositions comprising a blend of two or more paper strengthening agents have improved stability compared with previously known paper strengthening agents. One component is a polymeric paper strengthening agent, preferably a wet strengthening agent. The other component is a stabilized polyacrylamide prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized polyacrylamide. If desired, an aldehyde scavenger can be included in one or more of step (1), step (2), step (3), or the stabilized polyacrylamide. Such compositions can be used to enhance the strength of paper, particularly the wet strength of paper.

An electrically heated cigarette smoking system includes a cigarette that is formed with a tobacco rod portion, a filter tube portion, a tobacco mat layer wrapped around the tobacco rod portion and the filter tube portion with opposite ends of the tobacco mat layer abutting along a seam parallel to the central axis of the cigarette and cigarette paper wrapped around the tobacco mat layer and bonded to itself along an overlapped seam that is offset from the seam of the tobacco mat layer. The method of manufacturing the cigarette includes wrapping the tobacco mat layer and the cigarette paper around the tobacco rod portion and the filter tube portion on a single, high-speed machine.

An absorbent paper sheet is treated with an aqueous wax dispersion such that the sheet includes a fused wax and emulsifier residue in an amount of from about 1 to about 20 weight percent of the sheet based on the combined weight of the fiber, wax residue and an emulsifier residue in the sheet. The fused wax emulsion operates to make at least one surface of the sheet laterally hydrophobic, exhibiting a moisture penetration delay of at least about 2 seconds and less than about 40 seconds as well as a typical contact angle with water at one minute of at least about 50 degrees. There is thus provided absorbent products which exhibit both absorbency and resistance to moisture penetration. The treated sheet further exhibits microbial barrier properties, impeding transfer of bacteria, for example, through the sheet. There are produced tissue products which resist moisture penetration from propelled liquids as well as sequester sorbed liquids in the interior of the tissue.

An authenticatable paper product is prepared by adding to a papermaking furnish fibers treated with from about 50-200 lb/ton of a fluorescent whitening agent (FWA). The paper made from the papermaking furnish will include fluorescent cellulosic fibers in an amount ranging from between 0.1-4.0 lb/ton to achieve FWA concentrations within the range of 1-20 ppm.

A composition includes at least one hydrophilic polymer containing primary (—NH₂) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of increasing the strength of paper includes the step of contacting the paper with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function. A hydrogel composition is formed from a mixture of at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function.

The present invention relates to a polysaccharide having functional groups, wherein said groups are aldehyde groups formed at positions C2 and/or C3 as well as at position C6 of the anhydroglucose units of the polysaccharide chain. Preferably the polysaccharide is a cellulosic fibrous material whose primary and secondary hydroxyl groups of the cellulose are oxidized into aldehyde groups at least in part by means of TEMPO oxidation and periodate oxidation.The invention also concerns a paper or nonwoven comprising the above polysaccharide. According to the invention a relative wet strength of more than 10% can be achieved.

PCT No. PCT/JP96/01630 Sec. 371 Date May 7, 1997 Sec. 102(e) Date May 7, 1997 PCT Filed Jun. 14, 1996 PCT Pub. No. WO97/09483 PCT Pub. Date Mar. 13, 1997The paper for rolling a smoking article of the present invention contains particle-form calcium carbonate (30 to 60 wt %), calcined clay (5 to 30 wt %) and pulp. Furthermore, an alkaline metal salt is contained as a chemical additive. In addition, kaolin is contained in the paper. The basis weight of the paper falls within the range of 20 to 70 g/m2. Optical characteristics of the paper and the burning characteristics and ash characteristics of a cigarette are improved and the side stream smoke is reduced.