1077results about "Calenders" patented technology

The present invention aims to provide cellulose-based fibrous materials for obtaining papers and sheets having low density, high surface quality, good size stability despite of high strength, and high opacity. Cellulose-based fibrous materials having external fibrils consisting of an assembly of scale-like microfibrils exhibit a higher fiber stiffness, a lower water retention value and a higher specific surface area as compared with fibrous materials having filamentous external fibrils at the same freeness. Papers and sheets having low density, high surface quality, good size stability and high opacity can be obtained by using such fibrous materials.

Fibrous structures that exhibit a Geometric Mean Modulus (GM Modulus) of less than 1070 g/cm as measured according to the Modulus Test Method described herein and a Geometric Mean Elongation (GM Elongation or GM Elong) of less than 15% measured according to the Elongation Test Method described herein are provided.

Spirally wound paper products are disclosed having desirable roll firmness characteristics and softness properties. The rolled products can be made from a single ply tissue web formed according to various processes. Once formed, the tissue web is subjected to a shear-calendering device that increases the fuzz-on-edge properties of the web and preserves the bulk of the web when wound.

A method for calendering the sheet material web includes carrying the sheet material web on one or more carrier fabrics through the calender nip formed by the first and second calender rolls and applying a load to the carrier fabric, and sheet material carried thereby, so as to reduce the thickness of the sheet material web.

A soft single-ply tissue sheet is produced by making a textured, high bulk, throughdried tissue sheet and calendering the sheet with a high level of compression energy to substantially reduce the bulk and impart improved properties to the sheet.

A soft crepe paper machine comprises a wet section with a press section having a press defined by first and second press elements forming a press nip through which a press felt runs with a paper web. A suction roll is arranged in the loop of the press felt before the press nip at a distance from the second press element, and the felt with the web thereon runs around the suction roll with a large wrap angle. A drying cylinder forms the second press element. The first press element is either a solid press roll, a suction press roll, or a variable crown press roll.

The present invention relates to an air-laying dry paper machine. It includes at least more then one forming device, sizing device, drying device and cooling device which are successively mounted on the machine frame from front to rear. Said sizing device includes at least more than two sizing devices and box type drying box. Between the forming device and sizing device an embossing device and pre-presing hot roller unit can be added, and between drying device and cooling device a calendaring device is added. Besides, it also includes fluff pulp fluffer, fibrids opening, conveying and metering device and powder additive device.

A nip characterization system which has as inputs the pressure applied to the nip by the hydraulic loading devices, and loads applied at the end bearings and/or the loads applied to the roll support beam, and in addition directly measures nip load, has more than sufficient information to completely characterize the nip.

Fibrous structures that exhibit a Geometric Mean Elongation of greater than 15.8% as measured according to the Elongation Test Method are provided.

The invention relates to technical field of coated kraft liner producing method. The producing method comprises feeding surface pulp, lining pulp, core pulp and bottom pulp pumped from machine chest of pulping workshop into respective machine chest; slushing and pressure screening the lining pulp, the core pulp and the bottom pulp by offline back water bank, then slushing and pressure screening the surface pulp by the offline back water bank after removing impurities in the surface pulp in a low concentration sand remover, finally all the pulp entering into a flow box to flow onto wire; after the pulp flowing onto wire, feeding the pulp into a coating system after forming by a four-long net forming machine, second shoe pressing, drying, glue blending, redrying, and press polishing by a two-roller hot pressing machine; feeding the coated paper into a state-regulating cylinder and a soft calendar to finish, then reeling by a horizontal paper reeling machine. The coated kraft liner producing method disclosed by the invention can greatly reduce use cost of the coated kraft liner to make the domestic market not dependent on import any longer.

A four-row cylindrical roller bearing is incorporated into between the inner peripheral surface of a housing and the outer peripheral surface of a backup roller. A sensor unit 7 is held in a portion of a collar disposed in the axial-direction end portion of the four-row cylindrical roller bearing. The sensor unit comprises a detect part for detecting temperatures and vibrations and a transmitter device for transmitting signals, which are obtained after output signals taken out from the detect part are processed, as radio signals. On a portion of a hold cover which is a separate member from the collar, there is disposed a receive antenna which is part of a receiver apparatus for receiving the radio signals transmitted by the transmitter device.

The invention relates to a preparation process of test-liner environment-friendly kraft cardboard paper. The preparation process comprises the following steps: A, picking and selection of fine waste paper raw materials; B, crushing process; C, screening and purification; D, heat dispersion; E, treatment in a slurry storage tower; F, pulping process; G, treatment in a post-processing tank; H, treatment in a pulp distribution tank; I, treatment in a pulp forming tank; J, treatment by using a desander; K, treatment by using a pressure screen; L, treatment by using a net part; M, treatment by using a press part; N, treatment by using a front drying part; O, treatment by using a sizing machine; P, treatment by using a post-drying part; Q, treatment by using a hard calender; and R, reeling-up process. According to the preparation process provided by the invention, waste paper is recycled, and the obtained product with the same quality with test-liner environment-friendly kraft cardboard paper taking wood pulp as a raw material is produced, so that the cost is greatly reduced, the resources are saved, the effective circulation reuse of the renewable resources is guaranteed, and the damageto the environment is reduced. The preparation method has strong practicality and has strong promotion significance.

An industrial roll includes: a substantially cylindrical metallic core; a rubber base layer that is adhered to and circumferentially overlies the core; a rubber top stock layer that circumferentially overlies the base layer; and a polyurethane coating that circumferentially overlies the top stock layer. In this configuration, the roll can provide improved abrasion-resistance, sheet release properties, and/or toughness compared to a roll with a rubber cover, but may provide these properties in a cover that is softer than a typical polyurethane cover.

The invention relates to a method and an apparatus calendering a fiber web, wherein the fiber web passes through an extended and heated nip, said nip being formed on one side by a cylindrical heated roll and on the other side by a flexible tubular jacket which is pressed against the heated roll by means of a concave load shoe, said tubular jacket surrounding a stationary support beam which supports at least one actuator which may urge said load shoe and said flexible tubular jacket against said heated roll, and wherein the extension of the load shoe in the axial extension is less than the axial extension of the jacket and the heated roll such that when the load shoe is urged against the heated roll there will be formed tapered sections at each side end of the jacket within the nip characterised in that said tapered section are substantially covered by said fiber web such that a small strips of the fiber web at each edge is not calendered in said extended nip.

The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expandable microspheres, forming a paperboard web from the papermaking furnish, drying the web, and calendaring the web to a caliper of from about 11.0 to about 18.0 mils and a density ranging from about 7.0 to about 12.0 lb/3000 ft²/mil. Papers formed according to the method and articles formed therefrom are also disclosed.

The invention relates to a shoe press belt comprising an elastomer polymer having nanoparticles attached therewith through covalent bonds.