摘要:
The invention relates to an apparatus (1) for producing a fibrous web (2), in particular a tissue web, paper web or cardboard web, having a forming region (24) and a drying region (25). The drying region (25) comprises a pressure nip (14) which is formed by a suction roll (10) and a press roll (11), a drying cylinder (9) and a transfer pressure nip (15) which is positioned downstream of the pressure nip (14), for transferring the fibrous web (2) to the drying cylinder (9), wherein, together with a fabric (5), the fibrous web (2) wraps around the suction roll (10) in a wraparound region (19) in such a way that the fabric (5) lies between the suction roll (10) and the fibrous web (2). According to the invention, it is provided that the wraparound region is positioned upstream of the pressure nip (14) and a heating apparatus (17) is assigned directly to the fibrous web (2) in the wraparound region (19).
摘要:
A fabric for a papermaking machine, the fabric including a machine facing side and a web facing side having pockets formed by warp and weft yarns. Each pocket is defined by four sides on the web facing side, two of the four sides each formed by a warp knuckle of a single warp yarn that passes over three consecutive weft yarns to define the warp knuckle, the other two of the four sides each formed by a weft knuckle of a single weft yarn that passes over three consecutive warp yarns to define the weft knuckle, a lower surface of each pocket being formed by first and second lower warps yarns and first and second lower weft yarns, a first warp knuckle being of the first warp yarn passed over by a first weft knuckle and the first lower warp yarn being of the second warp yarn passed over by the first weft knuckle and the second lower warp yarn being of the third warp yarn passed over the first weft knuckle, a second weft knuckle being of the first weft yarn passed over by the first warp knuckle and the second lower weft yarn being of the second weft yarn passed over by the first warp knuckle and the first lower weft yarn being of the third weft yarn passed over by the first warp knuckle, the first lower warp yarn passing under the first and second lower weft yarns, and the second lower warp passing over the first lower weft yarn and under the second lower weft yarn.
摘要:
The invention relates to a method for producing a topographical pattern from polymer material on an endless strip with a longitudinal direction and a transverse direction extending perpendicularly thereto, in which method a cylindrical rotary screen is used to apply the polymer material by the screen printing process to a circumferential side of the endless strip to be printed, wherein, when producing the pattern, the rotary screen, rotating repeatedly about its longitudinal axis, rolls on the circumferential side of the endless strip, whereby the pattern is applied to the circumferential side in at least one path running at least once uninterruptedly around the circumferential side in such a way that the beginning and the end of each revolution of the path are arranged along a common straight line, wherein, when rolling, the rotary screen performs N revolutions about its longitudinal axis during each revolution of the path on the circumferential side of the endless strip and N is a positive integer.
摘要:
A method of making a fabric-creped absorbent cellulosic sheet is provided which includes dewatering a papermaking furnish and partially drying the web without wet-pressing before applying it to a translating transfer surface moving at a first speed. The process further includes fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a creping fabric, the creping step occurring under pressure in a creping nip defined between the transfer surface and the creping fabric wherein the fabric is traveling at a second speed slower than the speed of said transfer surface, the fabric pattern, nip parameters, velocity delta and web consistency being selected such that the web is creped from the surface and redistributed on the creping fabric. After creping, the web is dried, preferably with a plurality of can dryers to a consistency of at least about 90 percent while it is held in the creping fabric.
摘要:
The present invention is a woven sculpted fabric for the manufacture of a tissue web having a tissue contacting surface and a method for making such a woven sculpted fabric. The tissue contacting surface of the woven sculpted fabric includes at least a first group of strands and a second group of strands wherein the first group of strands extend in a first direction and the second group of strands extend in a second direction. The first group of strands are adapted to produce elevated floats and depressed sinkers thereby defining a three-dimensional fabric surface comprising; a first background region having a set of substantially parallel first elevated floats separated by a set of substantially parallel first depressed sinkers, comprising first depressed sinkers positioned between adjacent first elevated floats and comprising first elevated floats positioned between adjacent first depressed sinkers; a second background region having a set of substantially parallel second elevated floats separated by a set of substantially parallel second depressed sinkers, comprising second depressed sinkers positioned between adjacent second elevated floats and comprising second elevated floats positioned between adjacent second depressed sinkers; and, a transition region positioned between the first and second background regions, wherein the first elevated floats of the first background region descend to become the second depressed sinkers of the second background region and the second elevated floats of the second background region descend to become the first depressed sinkers ofthe first background region.
摘要:
The present invention relates to the creation of toweling with surprisingly high absorbency using a furnish comprising a major proportion of recycle furnish when the furnish is creped from a Yankee dryer coated with a creping adhesive comprising polyvinyl alcohol and an epichlorohydrin crosslinked polyamide creping adhesive at a consistency corresponding to a sheet temperature (immediately prior to the creping blade) of between 225°F and 255°F (107°C and 124°C) , preferably ranging from about 230°F (110°C) up to about 250°F (121°C).
摘要:
A fabric structure used to make textured nonwoven products, the structure being permeable to air and water, comprising a web contact surface having a pattern including a series of raised land areas and corresponding depressions adapted to impart a texture to the nonwoven product produced thereon, and a series of through voids adapted to allow passage of both water and/or air from the fabric surface into and/or through the structure.