摘要:
A papermaking fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter in the papermaking system. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device in the dryer section to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the dryer section or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.
摘要:
A papermaking fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter in the papermaking system. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device in the dryer section to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the dryer section or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.
摘要:
A papermaking fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter in the papermaking system. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device in the dryer section to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the dryer section or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.
摘要:
A papermaking fabric is treated by applying a nanoparticle type coating to improve their resistance to contamination by foreign matter in the papermaking system. The coating is applied during fabric manufacture and cured during heat setting. Alternatively, the coating applied or renewed by utilizing an existing shower or locating a spray boom or other suitable coating application device in the dryer section to apply the coating to the fabric in a controlled, uniform manner. Prior to application of the coating, the fabric is first thoroughly cleaned such as by showering or spraying, and then dried. Following controlled application of the coating, any excess material is removed by a suitable means, such as by vacuum, and the remaining coating on the fabric is then cured, either by utilizing the ambient heat of the dryer section or by a portable bank of heaters. In this manner, the fabric does not have to be removed from the machine in order to apply or renew the contaminant resistant coating.
摘要:
A double layer papermakers' fabric that is particularly suitable for forming or through-air drying (TAD) of high bulk tissue and towel product is provided. The fabric includes a single warp yarn system interwoven with three weft yarn systems such that: a first of the weft yarn systems is located on the paper side (PS) surface of the fabric; a second of the weft yarn systems is located on the machine side (MS) surface of the fabric; and the third weft yarn system is located intermediate between the first and second weft yarn systems. The yarns of the first and second weft yarn systems are interwoven with the warp yarn system such that they are vertically stacked with respect to one another in the fabric. The yarns of the third weft yarn system are interwoven so as to be located in a central plane of the fabric that is intermediate of the first and second weft yarn systems, and each yarn of the third yarn system is located in between the vertically stacked pairs of weft yarns of the first and second weft yarn systems. The warp and weft yarn systems are interwoven according to an asymmetric design which provides generally rectangular pockets on each of the PS and MS of the fabric with the yarns of the third weft yarn system forming the “bottom” of each pocket. There may be from about 50 to 750 pockets per sq. in. of fabric, each ranging in depth from about 0.1 mm to about 1.0 mm in depth; these pockets impart unevenness to the fabric surface which assists in creating bulk in the sheet formed or conveyed thereon. The fabrics of the invention also offer low sheet contact area, typically less than 30% of the total fabric surface, and generally in the range of from 15% to about 20%. The fabrics are also highly air permeable to ensure good air flow and drainage of the sheet.
摘要:
A double layer papermakers' fabric that is particularly suitable for forming or through-air drying (TAD) of high bulk tissue and towel product is provided. The fabric includes a single warp yarn system interwoven with three weft yarn systems such that: a first of the weft yarn systems is located on the paper side (PS) surface of the fabric; a second of the weft yarn systems is located on the machine side (MS) surface of the fabric; and the third weft yarn system is located intermediate between the first and second weft yarn systems. The yarns of the first and second weft yarn systems are interwoven with the warp yarn system such that they are vertically stacked with respect to one another in the fabric. The yarns of the third weft yarn system are interwoven so as to be located in a central plane of the fabric that is intermediate of the first and second weft yarn systems, and each yarn of the third yarn system is located in between the vertically stacked pairs of weft yarns of the first and second weft yarn systems. The warp and weft yarn systems are interwoven according to an asymmetric design which provides generally rectangular pockets on each of the PS and MS of the fabric with the yarns of the third weft yarn system forming the “bottom” of each pocket. There may be from about 50 to 750 pockets per sq. in. of fabric, each ranging in depth from about 0.1 mm to about 1.0 mm in depth; these pockets impart unevenness to the fabric surface which assists in creating bulk in the sheet formed or conveyed thereon. The fabrics of the invention also offer low sheet contact area, typically less than 30% of the total fabric surface, and generally in the range of from 15% to about 20%. The fabrics are also highly air permeable to ensure good air flow and drainage of the sheet.
摘要:
A multilayered papermakers' forming fabric comprises at least one set of machine direction (MD) warp yarns, at least a first set of cross-machine direction (CD) machine side layer weft yarns; and paper side layer weft yarns woven in a repeating pattern with at least some of the MD warp yarns. At least some of the paper side layer weft yarns comprise an array of bulk enhancing weft yarns each having a vertical dimension which exceeds a corresponding vertical dimension of each of the remaining paper side layer weft yarns in a ratio of at least 1.25:1. Selected weft yarns can have different float lengths in the paper side surface. The fabrics of the invention impart increased bulk for products such as towel or tissue without loss of other required characteristics.
摘要:
A woven fabric band having a first and a second woven fabric layer having second longitudinal and second transverse threads, the outer side of the second woven fabric layer being formed by floats of longitudinal threads, wherein the longitudinal threads form a first longitudinal thread group with outer longitudinal threads and a second longitudinal thread group with inner longitudinal threads and that the outer longitudinal threads form the outer side of the second layer and the inner longitudinal threads extend within the band.
摘要:
A papermaker's fabric including at least one system of warp yarns interwoven with at least first and second systems of weft yarns, with the weft yarns of the first system of weft yarns having a vertical dimension that is greater than a vertical dimension of the weft yarns of the second system. The fabric has a papermaking surface and a machine side surface, and in the papermaking surface, the yarns of the first system of weft yarns are interwoven with the warp yarns to provide groups of four weft yarn floats which form four corners of a box shape, the yarns of the second system of weft yarns are interwoven with the warp yarns so as to pass through the bottom of the box shape, and further provide support areas in pockets located adjacent to the box shapes, and at least one yarn from the second system of weft yarns interweaves with the warp yarns to occupy space in a center plane of the fabric so as to restrict or retard drainage and thereby increase a center plane resistance of the fabric.
摘要:
A single layer papermaking machine forming fabric which is woven from a single layer of warps interlaced with primary wefts, secondary wefts, and, if desired, tertiary wefts. The secondary and tertiary wefts are located between the primary wefts. The fabric is woven in a first pattern which repeats once in N sheds, and N is at least 10. The primary, secondary, and, if present, tertiary weft are woven to second, third, and, if present, fourth patterns in a lower number of sheds and which repeat at least twice within the first pattern. This weave provides a forming fabric having good first pass retention, good drainage properties, reduced wire mark, good fabric height and good release characteristics. In certain pattern combinations a forming fabric can be woven exhibiting a level of visual discontinuity or randomness in the paper side face.