利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

11 条记录 (耗时 0.022 秒)

    Method of enhancing strength of paper products and the resulting products
    1.
    发明授权
    Method of enhancing strength of paper products and the resulting products 失效
    提高纸制品及其产品强度的方法

    公开(公告)号：US5830320A

    公开(公告)日：1998-11-03

    申请号：US718103

    申请日：1996-09-18

    申请人： David W. Park ,  Frank R. Hunter

    发明人： David W. Park ,  Frank R. Hunter

    IPC分类号： D21H23/04 ,  D21H11/14 ,  D21H17/55 ,  D21H21/20

    CPC分类号： D21H21/20 ,  D21H17/55 ,  D21H23/04

    摘要： The invention is a method of enhancing the strength of paper products, particularly the dry strength, without adversely affecting repulpability. It is also directed to the resulting products. It is particularly applicable but not limited to products with significant amounts of secondary fiber in the furnish. Preferably, about 10-30% of the fiber is separated from the furnish at some point prior to sheeting. This is treated with a cationic wet strength resin which is allowed to bond to the fiber. Cationic polyamide-epichlorohydrin resins are particularly useful. The treated fiber is them mixed with the untreated balance of the fiber at some point before the paper machine. Screnning fines on repulping do not normally exceed 2-3%.

    摘要翻译： 本发明是提高纸制品的强度，特别是干强度的方法，而不会不利地影响纸浆的再浆化性。 它也针对所产生的产品。 特别适用于但不限于在配料中具有大量二次纤维的产品。 优选地，约10-30％的纤维在成片之前的某一时刻与配料分离。 用阳离子湿强度树脂处理，使其与纤维结合。 阳离子聚酰胺 - 表氯醇树脂特别有用。 处理过的纤维在造纸机之前的某个时刻与纤维的未处理平衡物混合。 罚款罚款通常不超过2-3％。

    Cellulose products treated with isocyanate compositions
    3.
    发明授权
    Cellulose products treated with isocyanate compositions 失效
    用异氰酸酯组合物处理的纤维素产品

    公开(公告)号：US5580922A

    公开(公告)日：1996-12-03

    申请号：US467498

    申请日：1995-06-06

    申请人： David W. Park ,  Frank R. Hunter

    发明人： David W. Park ,  Frank R. Hunter

    IPC分类号： B65D65/42 ,  C08G18/16 ,  C08G18/30 ,  C08G18/64 ,  C08K5/10 ,  B32B29/06 ,  B65D5/00 ,  B65D25/00 ,  B65D25/34 ,  C08G18/02 ,  C08K5/101 ,  C08K5/11

    CPC分类号： C08G18/6484 ,  B65D65/42 ,  C08G18/168 ,  C08G18/302 ,  C08K5/10 ,  Y10T428/2965 ,  Y10T428/31975 ,  Y10T428/31982 ,  Y10T428/31993

    摘要： The invention is directed to a composition of matter useful as a paper impregnant, to the method of its use, and to the products produced by the method. Poly (diphenylmethane diisocyanate) or PMDI has been used in the past as a paper impregnant with or without propylene carbonate as a diluent. These products have generally required pressing under high pressures and at elevated temperatures. It has now been found that triacetin and/or triethyl citrate in usages up to about 20% of PMDI give superior performance in impregnated products. The modified PMDI will cure at essentially ambient conditions in times as short as 1-2 days to insoluble polyureas with low residual amounts of isocyanates and reaction byproducts such as 4,4'-diaminodiphenylmethane. The treated papers can be used in applications of which skins for sandwich panels and high strength corrugated board would be exemplary.

    摘要翻译： 本发明涉及用作纸浸渍剂的物质组合物，其使用方法以及通过该方法制备的产品。 过去，已经使用聚（二苯基甲烷二异氰酸酯）或PMDI作为具有或没有碳酸丙烯酯作为稀释剂的纸浸渍剂。 这些产品通常需要在高压和高温下进行压制。 现在已经发现，使用多达约20％的PMDI的三醋精和/或柠檬酸三乙酯在浸渍产品中具有优异的性能。 修改的PMDI将在短时间至1-2天的基本环境条件下固化，得到具有低残留量异氰酸酯和反应副产物如4,4'-二氨基二苯基甲烷的不溶性聚脲。 经处理的纸可用于夹层板和高强度瓦楞纸板的表皮将是示例性的应用。

    Isocyanate impregnating compositions
    5.
    发明授权
    Isocyanate impregnating compositions 失效
    异氰酸酯浸渍组合物

    公开(公告)号：US5710434A

    公开(公告)日：1998-01-20

    申请号：US715977

    申请日：1996-09-19

    申请人： David W. Park ,  Frank R. Hunter

    发明人： David W. Park ,  Frank R. Hunter

    IPC分类号： B65D65/42 ,  C08G18/16 ,  C08G18/30 ,  C08G18/64 ,  C08K5/10 ,  C08K5/05 ,  C08K5/11

    CPC分类号： C08G18/6484 ,  B65D65/42 ,  C08G18/168 ,  C08G18/302 ,  C08K5/10 ,  Y10T428/2965 ,  Y10T428/31975 ,  Y10T428/31982 ,  Y10T428/31993

    摘要： The invention is directed to a composition of matter useful as a paper impregnant, to the method of its use, and to the products produced by the method. Poly (diphenylmethane diisocyanate) or PMDI has been used in the past as a paper impregnant with or without propylene carbonate as a diluent. These products have generally required pressing under high pressures and at elevated temperatures. It has now been found that triacetin and/or triethyl citrate in usages up to about 20% of PMDI give superior performance in impregnated products. The modified PMDI will cure at essentially ambient conditions in times as short as 1-2 days to insoluble polyureas with low residual amounts of isocyanates and reaction byproducts such as 4,4'-diaminodiphenylmethane. The treated papers can be used in applications of which skins for sandwich panels and high strength corrugated board would be exemplary.

    摘要翻译： 本发明涉及用作纸浸渍剂的物质组合物，其使用方法以及通过该方法制备的产品。 过去，已经使用聚（二苯基甲烷二异氰酸酯）或PMDI作为具有或没有碳酸丙烯酯作为稀释剂的纸浸渍剂。 这些产品通常需要在高压和高温下进行压制。 现在已经发现，使用多达约20％的PMDI的三醋精和/或柠檬酸三乙酯在浸渍产品中具有优异的性能。 修改的PMDI将在短时间至1-2天的基本环境条件下固化，得到具有低残留量异氰酸酯和反应副产物如4,4'-二氨基二苯基甲烷的不溶性聚脲。 经处理的纸可用于夹层板和高强度瓦楞纸板的表皮将是示例性的应用。

    Wood veneers and products therefrom having enhanced strength and stiffness
    6.
    发明授权
    Wood veneers and products therefrom having enhanced strength and stiffness 失效
    木材单板及其产品具有增强的强度和刚度

    公开(公告)号：US5652065A

    公开(公告)日：1997-07-29

    申请号：US579919

    申请日：1995-12-28

    申请人： David W. Park ,  Frank R. Hunter ,  Alkiviadis G. Dimakis

    发明人： David W. Park ,  Frank R. Hunter ,  Alkiviadis G. Dimakis

    IPC分类号： B27K5/06 ,  B27M1/02 ,  B32B21/13 ,  B32B9/00

    CPC分类号： B32B21/13 ,  B27M1/02 ,  B27K3/36 ,  B27K5/06 ,  Y10T428/24066 ,  Y10T428/24132 ,  Y10T428/24521 ,  Y10T428/24942 ,  Y10T428/24992 ,  Y10T428/249992 ,  Y10T428/31783 ,  Y10T428/3179 ,  Y10T428/31957 ,  Y10T428/31989 ,  Y10T428/662

    摘要： Wood veneers having enhanced strength and/or stiffness, wood products made therefrom, and methods for manufacturing such veneers and wood products are disclosed. A treated veneer having enhanced strength and stiffness has a population of compacted wood cells extending across at least a portion of the length and width dimensions and into the thickness dimension of the veneer to confer an increased density level, and thus increased strength and/or stiffness levels, to the veneer. Interspersed in the compacted wood cells is a non-saturating loading level of a cured rigid thermoset material which maintains compaction of the compacted cells even after prolonged soaking in water. The preferred loading level is just what is required to maintain compaction of the cells. The preferred thermoset material is polyurea which is formed from a polyisocyanate resin applied to at least one major surface of the veneer followed by hot-pressing the veneer. The strength and/or stiffness increase, compared to untreated veneer, is about 10 to 150 percent. Treated veneers can be made into various multiple-ply wood products such as laminated veneer lumber and plywood, thereby providing a way to convert relatively weak lumber from fast-grown trees into premium-grade construction material.

    摘要翻译： 公开了具有增强的强度和/或刚度的木制单板，由其制成的木制品，以及用于制造这种单板和木制品的方法。 具有增强的强度和刚度的经处理的单板具有延伸穿过长度和宽度尺寸的至少一部分并且进入薄板的厚度尺寸的压实木质细胞群以赋予增加的密度水平，并因此提高强度和/或刚度 水平，到贴面。 在压实的木质细胞中散布的是固化的刚性热固性材料的非饱和负载水平，即使在长时间浸泡在水中之后也能保持压实的细胞的压实。 优选的负载水平只是维持电池压实所需的负载水平。 优选的热固性材料是聚脲，其由施加到单板的至少一个主表面的多异氰酸酯树脂形成，随后热压该单板。 与未经处理的单板相比，强度和/或刚度增加约为10至150％。 经处理的单板可以制成各种多层木制品，如层压单板木材和胶合板，从而提供将相对较弱的木材从快速种植的树木转化为高档建筑材料的方法。

    Crosslinked cellulose products and method for their preparation
    7.
    发明授权
    Crosslinked cellulose products and method for their preparation 失效
    交联纤维素产品及其制备方法

    公开(公告)号：US5399240A

    公开(公告)日：1995-03-21

    申请号：US87186

    申请日：1993-07-02

    申请人： Peter A. Graef ,  Frank R. Hunter

    发明人： Peter A. Graef ,  Frank R. Hunter

    IPC分类号： A61F13/15 ,  D21H11/20 ,  D21H17/06 ,  D21H17/07 ,  D21H17/09 ,  D21H17/10 ,  D21H17/15 ,  D21H21/06 ,  D21H21/14 ,  D21H21/24 ,  D21H23/14 ,  D21H23/18 ,  D21H23/28

    CPC分类号： D21H21/06 ,  D21H11/20 ,  D21H17/06 ,  D21H17/07 ,  D21H17/09 ,  D21H17/10 ,  D21H17/15 ,  D21H21/14 ,  D21H21/24 ,  D21H23/14 ,  D21H23/18 ,  D21H23/28 ,  A61F2013/530007 ,  A61F2013/530474

    摘要： The invention is a method of making a wet formed, sheeted, readily reslurriable sheeted crosslinked cellulose and the products made by the method. Crosslinked wood pulp fibers tend to be quite brittle. If crosslinked while in sheeted form, the sheets cannot be readily defibered, either in a wet or dry state, without serious fiber degradation. The sheet products of the present invention can be easily redispersed or repulped in water without significant fiber breakage. The present products are made by including within the sheet, while still in wet form, a debonding or softening agent which is preferably added before the latent crosslinking reactant. Most preferably the debonder is added prior to the headbox of a paper machine and the crosslinking reactant is applied near the end of the forming wire or at the press section. The treated sheet is dried conventionally. Crosslinking may occur entirely during drying or during a period of additional heating, usually at a temperature in excess of 100.degree. C. for a short period of time. Conventional debonding agents and crosslinking reactants are suitable. The softening agent apparently reduces or prevents adhesive bonding between adjacent fibers caused by polymer formation external to the fibers under reaction conditions.

    摘要翻译： 本发明是一种制成湿成型，片状，易于再生的片状交联纤维素和通过该方法制备的产品的方法。 交联的木浆纤维往往是相当脆的。 如果以片状形式交联，则在湿或干燥状态下，片材不能容易地脱纤维，而不会严重的纤维降解。 本发明的片状产品可以容易地再分散或重新分配在水中而不会明显的纤维断裂。 本产品通过在片状物中包含湿态形式，优选在潜在交联反应剂之前加入的脱粘剂或软化剂制成。 最优选地，脱纸器在造纸机的流浆箱之前添加，并且交联反应物被施加在成形丝的端部附近或在压榨部分处。 经处理的片材是常规干燥的。 交联可能在干燥期间或在额外加热期间完全发生，通常在超过100℃的温度下短时间内完成。 常规脱粘剂和交联反应物是合适的。 在反应条件下，柔软剂显着降低或防止由纤维外部的聚合物形成引起的相邻纤维之间的粘结。

    Isocyanate modified cellulose products and method for their manufacture
    9.
    发明授权
    Isocyanate modified cellulose products and method for their manufacture 失效
    异氰酸酯改性纤维素产品及其制造方法

    公开(公告)号：US5008359A

    公开(公告)日：1991-04-16

    申请号：US275824

    申请日：1988-11-25

    申请人： Frank R. Hunter

    发明人： Frank R. Hunter

    IPC分类号： B32B23/16 ,  C08G18/64 ,  C08L1/02 ,  C08L97/02 ,  D21H17/57 ,  D21H25/06 ,  D21H27/30

    CPC分类号： D21H27/30 ,  B32B23/16 ,  C08G18/6484 ,  C08L1/02 ,  C08L97/02 ,  D21H17/57 ,  D21H25/06 ,  Y10T428/31978 ,  Y10T428/31982 ,  Y10T428/31986 ,  Y10T428/31989

    摘要： The invention is a method of making a cellulose based polymeric material and the products of the invention. A cellulosic substrate is impregnated with an essentially uncatalyzed polyfunctinal isocyanate and pressed at elevated temperature and pressure. The substrate may be a chemical or thermomechanical pulp or paper while the isocyanate is preferably diphenylmethane diisocyanate or its oligomers. Pressing conditions are preferably in the range of about 150.degree.-245.degree. C. at pressures in the range of about 2700-8300 kPa for times less than 2 minutes. Moisture content of the cellulosic substrate is not highly critical and may be as high as 7% without adverse effects. The product is especially useful as overlays and for forming strong, water resistant laminates which can be molded in either flat or three dimensional forms.

    摘要翻译： 本发明是制备纤维素基聚合物材料和本发明产品的方法。 用基本上未催化的聚异氰酸酯浸渍纤维素基质，并在升高的温度和压力下压制。 基材可以是化学或热机械纸浆或纸，而异氰酸酯优选为二苯基甲烷二异氰酸酯或其低聚物。 压力条件优选在约150°-245℃的范围内，在约2700-8300kPa范围内的压力小于2分钟。 纤维素底物的水分含量不是非常关键的，并且可以高达7％而没有不利影响。 该产品特别用作覆盖物和用于形成强的防水层压材料，其可以以平坦或三维形式成型。