公开(公告)号：US5179021A

公开(公告)日：1993-01-12

申请号：US308529

申请日：1989-02-10

申请人： John R. du Manoir ,  Paul Dubelsten

发明人： John R. du Manoir ,  Paul Dubelsten

IPC分类号： C12S3/08 ,  C12N9/24 ,  D21C5/00 ,  D21C9/10 ,  D21C9/147

CPC分类号： C12Y302/01032 ,  C12N9/248 ,  C12Y302/01008 ,  D21C5/005 ,  D21C9/1057 ,  D21C9/147

摘要： Process for bleaching lignocellulosic material comprising an oxygen bleaching treatment and an enzymatic treatment with a substantially cellulase-free xylanase, which process is compatible with, and can be incorporated into, conventional bleaching sequences. The process provides a delignified and bleached pulp using lower amounts of chlorine-containing compounds, and the opportunity of eliminating the use of elemental chlorine, thereby reducing the polluting effluent from a pulp mill employing the process. Also, a greater extent of delignification can be achieved while retaining acceptable pulp strength properties. The oxygen bleaching treatment and the enzynmatic treatment are done in series.

公开(公告)号：US5118389A

公开(公告)日：1992-06-02

申请号：US549145

申请日：1990-07-06

申请人： Paul Dubelsten ,  Christopher J. Kanters ,  John R. Du Manoir

发明人： Paul Dubelsten ,  Christopher J. Kanters ,  John R. Du Manoir

IPC分类号： D21C9/10 ,  D21C9/16

CPC分类号： D21C9/1057 ,  D21C9/163

摘要： A continuous two-stage peroxide bleaching process operated in a single bleach plant for producing a bleached pulp of high brightness, having a second stage bleaching step using a high charge of peroxide followed by a washing stage to recover the residual liquor containing a substantial amount of the applied peroxide. The residual liquor is recycled and used for bleaching in the first stage. Only a portion of the pulp bleached in the first stage is treated in the second stage. Two or more bleached pulp products can be produced simultaneously. The bleached pulp products can be used to form different layers of a multi-layer paper products.

公开(公告)号：US06821614B1

公开(公告)日：2004-11-23

申请号：US09336339

申请日：1999-06-18

申请人： Paul Dubelsten ,  Lorence E. Knowles ,  Erik J. Van Kleek ,  Alister Cumming Hume ,  Scott Bradley Gough

发明人： Paul Dubelsten ,  Lorence E. Knowles ,  Erik J. Van Kleek ,  Alister Cumming Hume ,  Scott Bradley Gough

IPC分类号： B32B2720

CPC分类号： B32B37/10 ,  B27N3/007 ,  B27N3/086 ,  B32B5/16 ,  B32B23/04 ,  B32B23/08 ,  B32B38/0008 ,  B32B38/06 ,  B32B2272/00 ,  B32B2305/70 ,  B32B2310/14 ,  B32B2317/16 ,  B32B2317/18 ,  B32B2398/20 ,  Y10T428/249942 ,  Y10T428/24995 ,  Y10T428/26

摘要： A method for forming a product from cellulosic material and thermoactive material is described. A mat is formed from a mixture having a predetermined amount of cellulosic material and a predetermined amount of thermoplastic material. The mat is then consolidated and pressed to a predetermined final product thickness. At least a portion of a surface of the mat or product is then surface modified. Consolidating the mixture may include forming a first face layer, forming a core layer on the first face layer, and forming a second face layer on the core layer. Forming the core layer may include depositing mixtures of wood flakes and plastic flakes according to mixture flake size in successive layers such that the core layer has larger flakes adjacent the first face layer and adjacent the second face layer, and smaller flakes in a middle portion of the core layer. The method also can include fusing a sheet of plastic material to at least one surface of the mat, and surface modifying the plastic material. Grafting chemicals can be applied to surface modified mats, plastic material or products. A composite product also is described. One embodiment of the product comprises a first portion having a first core formed from a mixture comprising a cellulosic material and a thermoplastic material, and at least one face layer attached to the first core. The product also comprises a second portion bonded to the first portion. The second portion comprises a second core formed from a mixture comprising a cellulosic material and a thermoplastic material, and at least one face layer attached to the second core.

摘要翻译： 描述了从纤维素材料和热活性材料形成产品的方法。 由具有预定量的纤维素材料和预定量的热塑性材料的混合物形成垫。 然后将垫固化并压制至预定的最终产品厚度。 然后将垫或产品的表面的至少一部分进行表面改性。 混合混合物可以包括形成第一面层，在第一面层上形成芯层，以及在芯层上形成第二面层。 形成芯层可以包括根据连续层中的混合物薄片尺寸沉积木片和塑料薄片的混合物，使得芯层具有与第一面层相邻并且邻近第二面层的较大薄片，并且在中间部分中的较小薄片 核心层。 该方法还可以包括将一片塑料材料熔合到垫的至少一个表面上，以及改变塑料材料的表面。 接枝化学品可用于表面改性垫，塑料材料或产品。 还描述了复合产品。 该产品的一个实施方案包括具有由包含纤维素材料和热塑性材料的混合物形成的第一芯部的第一部分和连接到第一芯部的至少一个面层。 产品还包括结合到第一部分的第二部分。 第二部分包括由包含纤维素材料和热塑性材料的混合物形成的第二芯部和连接到第二芯部的至少一个面层。

公开(公告)号：US06200682B1

公开(公告)日：2001-03-13

申请号：US08988680

申请日：1997-12-11

申请人： Paul Dubelsten ,  Lorence E. Knowles ,  Erik J. Van Kleek

发明人： Paul Dubelsten ,  Lorence E. Knowles ,  Erik J. Van Kleek

IPC分类号： B32B2102

CPC分类号： B27N3/007 ,  B27N3/086 ,  Y10T428/2913 ,  Y10T428/31 ,  Y10T428/31971 ,  Y10T428/31989

摘要： An apparatus and method for continuously forming composites comprising filler materials and thermoactive materials, particularly waste cellulosic materials and waste thermoplastics, are described. One embodiment of the apparatus includes either a batchwise or continuous mixer, such as a cyclone, for forming mixtures comprising filler and thermoactive material. The mixtures are conveyed to a continuous consolidation apparatus. Alternatively, the mixtures may be densified in a densifying apparatus before entering the consolidation apparatus. The consolidation apparatus includes a hot-gas distribution system having plural paired gas cells, such as rollers or hoods, for applying hot air to the charge. A first cell of each pair applies gas to the mixture. The second cell of each pair operates at a pressure less than that of the first cell, thereby creating a pressure differential across the charge. Certain embodiments of the apparatus include at least one set of baffles positioned adjacent a cell, at least one shroud positioned about a cell, or at least one set of baffles positioned adjacent a first cell and at least one shroud positioned about a second cell. The baffles and shrouds are used to eliminate or substantially reduce the amount of gas that is vented to the surrounding atmosphere. The method comprises continuously consolidating the mixtures by applying a hot, dry noncondensable gas to the mixture. Besides the filler material and the thermoactive material the mixture may further include materials selected from the group consisting of biocides, fungicides, fire retardants, conductive materials, pigments, water retardants, wax-like materials, coupling agents, crosslinking agents, and combinations thereof.

摘要翻译： 描述了用于连续地形成包含填充材料和热活性材料，特别是废纤维素材料和废热塑性材料的复合材料的装置和方法。 该装置的一个实施例包括间歇式或连续混合器，例如旋流器，用于形成包含填料和热活性材料的混合物。 将混合物输送到连续固化装置。 或者，混合物可以在进入固结装置之前在致密化装置中致密化。 固结装置包括热气分配系统，该系统具有多个成对的气体单元，例如辊或罩，用于将热空气用于充电。 每对的第一个电池将气体施加到混合物中。 每对的第二电池在比第一电池的压力小的压力下工作，从而在电荷两端产生压力差。 装置的某些实施例包括至少一组位于电池附近的挡板，围绕电池定位的至少一个护罩或邻近第一电池定位的至少一组挡板以及围绕第二电池定位的至少一个罩。 挡板和护罩用于消除或显着减少排放到周围大气的气体量。 该方法包括通过向混合物中施加热的，干燥的不可冷凝气体来连续地固化混合物。 除了填充材料和热活性材料之外，混合物还可以包括选自杀生物剂，杀真菌剂，阻燃剂，导电材料，颜料，阻水剂，蜡状材料，偶联剂，交联剂及其组合的材料。

公开(公告)号：US20050140058A1

公开(公告)日：2005-06-30

申请号：US10991141

申请日：2004-11-16

申请人： Paul Dubelsten ,  Lorence Knowles ,  Erik Van Kleek ,  Alister Hume ,  Scott Gough

发明人： Paul Dubelsten ,  Lorence Knowles ,  Erik Van Kleek ,  Alister Hume ,  Scott Gough

IPC分类号： B27N3/00 ,  B27N3/08 ,  B32B23/08 ,  D04H1/00 ,  D04H1/16 ,  B27N3/18

CPC分类号： B32B37/10 ,  B27N3/007 ,  B27N3/086 ,  B32B5/16 ,  B32B23/04 ,  B32B23/08 ,  B32B38/0008 ,  B32B38/06 ,  B32B2272/00 ,  B32B2305/70 ,  B32B2310/14 ,  B32B2317/16 ,  B32B2317/18 ,  B32B2398/20 ,  Y10T428/249942 ,  Y10T428/24995 ,  Y10T428/26

摘要： A method for forming a product from cellulosic material and thermoactive material is described. A mat is formed from a mixture having a predetermined amount of cellulosic material and a predetermined amount of thermoplastic material. The mat is then consolidated and pressed to a predetermined final product thickness. At least a portion of a surface of the mat or product is then surface modified. Consolidating the mixture may include forming a first face layer, forming a core layer on the first face layer, and forming a second face layer on the core layer. Forming the core layer may include depositing mixtures of wood flakes and plastic flakes according to mixture flake size in successive layers such that the core layer has larger flakes adjacent the first face layer and adjacent the second face layer, and smaller flakes in a middle portion of the core layer. The method also can include fusing a sheet of plastic material to at least one surface of the mat, and surface modifying the plastic material. Grafting chemicals can be applied to surface modified mats, plastic material or products. A composite product also is described. One embodiment of the product comprises a first portion having a first core formed from a mixture comprising a cellulosic material and a thermoplastic material, and at least one face layer attached to the first core. The product also comprises a second portion bonded to the first portion. The second portion comprises a second core formed from a mixture comprising a cellulosic material and a thermoplastic material, and at least one face layer attached to the second core.

摘要翻译： 描述了从纤维素材料和热活性材料形成产品的方法。 由具有预定量的纤维素材料和预定量的热塑性材料的混合物形成垫。 然后将垫固化并压制至预定的最终产品厚度。 然后将垫或产品的表面的至少一部分进行表面改性。 混合混合物可以包括形成第一面层，在第一面层上形成芯层，以及在芯层上形成第二面层。 形成芯层可以包括根据连续层中的混合物薄片尺寸沉积木片和塑料薄片的混合物，使得芯层具有与第一面层相邻并且邻近第二面层的较大薄片，并且在中间部分中的较小薄片 核心层。 该方法还可以包括将一片塑料材料熔合到垫的至少一个表面上，以及改变塑料材料的表面。 接枝化学品可用于表面改性垫，塑料材料或产品。 还描述了复合产品。 该产品的一个实施方案包括具有由包含纤维素材料和热塑性材料的混合物形成的第一芯部的第一部分和连接到第一芯部的至少一个面层。 产品还包括结合到第一部分的第二部分。 第二部分包括由包含纤维素材料和热塑性材料的混合物形成的第二芯部和连接到第二芯部的至少一个面层。

公开(公告)号：US06863512B2

公开(公告)日：2005-03-08

申请号：US09803066

申请日：2001-03-08

申请人： Paul Dubelsten ,  Lorence E. Knowles ,  Erik J. Van Kleek

发明人： Paul Dubelsten ,  Lorence E. Knowles ,  Erik J. Van Kleek

IPC分类号： B27N3/00 ,  B27N3/08 ,  B29C70/54

CPC分类号： B27N3/007 ,  B27N3/086 ,  Y10T428/2913 ,  Y10T428/31 ,  Y10T428/31971 ,  Y10T428/31989

摘要： An apparatus and method for continuously forming composites comprising filler materials and thermoactive materials, particularly waste cellulosic materials and waste thermoplastics, are described. One embodiment of the apparatus includes either a batchwise or continuous mixer, such as a cyclone, for forming mixtures comprising filler and thermoactive material. The mixtures are conveyed to a continuous consolidation apparatus. Alternatively, the mixtures may be densified in a densifying apparatus before entering the consolidation apparatus. The consolidation apparatus includes a hot-gas distribution system having plural paired gas cells, such as rollers or hoods, for applying hot air to the charge. A first cell of each pair applies gas to the mixture. The second cell of each pair operates at a pressure less than that of the first cell, thereby creating a pressure differential across the charge. Certain embodiments of the apparatus include at least one set of baffles positioned adjacent a cell, at least one shroud positioned about a cell, or at least one set of baffles positioned adjacent a first cell and at least one shroud positioned about a second cell. The baffles and shrouds are used to eliminate or substantially reduce the amount of gas that is vented to the surrounding atmosphere. The method comprises continuously consolidating the mixtures by applying a hot, dry noncondensable gas to the mixture. Besides the filler material and the thermoactive material the mixture may further include materials selected from the group consisting of biocides, fungicides, fire retardants, conductive materials, pigments, water retardants, wax-like materials, coupling agents, crosslinking agents, and combinations thereof.

摘要翻译： 描述了用于连续地形成包含填充材料和热活性材料，特别是废纤维素材料和废热塑性材料的复合材料的装置和方法。 该装置的一个实施例包括间歇式或连续混合器，例如旋流器，用于形成包含填料和热活性材料的混合物。 将混合物输送到连续固化装置。 或者，混合物可以在进入固结装置之前在致密化装置中致密化。 固结装置包括热气分配系统，该系统具有多个成对的气体单元，例如辊或罩，用于将热空气用于充电。 每对的第一个电池将气体施加到混合物。 每对的第二电池在比第一电池的压力小的压力下工作，从而在电荷两端产生压力差。 装置的某些实施例包括至少一组位于电池附近的挡板，围绕电池定位的至少一个护罩或邻近第一电池定位的至少一组挡板以及围绕第二电池定位的至少一个罩。 挡板和护罩用于消除或显着减少排放到周围大气的气体量。 该方法包括通过向混合物中施加热的，干燥的不可冷凝气体来连续地固化混合物。 除了填充材料和热活性材料之外，混合物还可以包括选自杀生物剂，杀真菌剂，阻燃剂，导电材料，颜料，阻水剂，蜡状材料，偶联剂，交联剂及其组合的材料。

公开(公告)号：US06605245B1

公开(公告)日：2003-08-12

申请号：US09595636

申请日：2000-06-16

申请人： Paul Dubelsten ,  Lorence E. Knowles ,  Heber D. Layton ,  Alister Cumming Hume ,  Scott Bradley Gough ,  Erik J. Van Kleek

发明人： Paul Dubelsten ,  Lorence E. Knowles ,  Heber D. Layton ,  Alister Cumming Hume ,  Scott Bradley Gough ,  Erik J. Van Kleek

IPC分类号： B29C7002

CPC分类号： B32B23/08 ,  B27N3/007 ,  B27N3/086 ,  B32B38/0008 ,  B32B2305/70 ,  B32B2310/14 ,  B32B2317/16 ,  B32B2398/20 ,  D04H1/16 ,  D04H1/541 ,  D04H1/558

摘要： A method for forming a product from cellulosic material and thermoactive material is described. A mat is formed from a mixture having cellulosic material and thermoplastic material. The mat is consolidated and pressed to a final thickness. At least a portion of a surface of the mat or product may be surface modified. Consolidating the mixture may include forming a first face layer, forming a core layer on the first face layer, and forming a second face layer on the core layer. Forming the core layer may include depositing mixtures of wood flakes and plastic flakes according to mixture flake size in successive layers such that the core layer has larger flakes adjacent the first face layer and adjacent the second face layer, and smaller flakes in a middle portion of the core layer. Consolidation can occur as a mat or composite moves through a hot-gas consolidation zone.

摘要翻译： 描述了从纤维素材料和热活性材料形成产品的方法。 由具有纤维素材料和热塑性材料的混合物形成垫。 将垫固结并压制成最终厚度。 垫或产品的表面的至少一部分可以被表面改性。 混合混合物可以包括形成第一面层，在第一面层上形成芯层，以及在芯层上形成第二面层。 形成芯层可以包括根据连续层中的混合物薄片尺寸沉积木片和塑料薄片的混合物，使得芯层具有与第一面层相邻并且邻近第二面层的较大薄片，并且在中间部分中的较小薄片 核心层。 固结可能发生在垫或复合材料移动通过热气合并区域。