摘要:
Processes for producing cellulose microfibrils from herbaceous plant material using enzyme compositions, the cellulose microfibrils obtained from the processes and their uses, and compositions comprising the cellulose microfibrils are described.
摘要:
Methods of treating wood and wood products include irradiating untreated wood having a first molecular weight with ionizing radiation to cause an increase in the molecular weight of a cellulosic component of the wood to a second, relatively higher molecular weight.
摘要:
Grafted, crosslinked cellulosic materials used in absorbent articles, the grafted crosslinked cellulosic materials including cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of the cellulose fibers and the polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains.
摘要:
Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.
摘要:
A method of inhibiting the growth of bacteria in an absorbent device by using kraft pulp fiber subjected to an acidic, catalyzed peroxide treatment process incorporated into a single stage of a multi-stage bleaching process.
摘要:
The invention relates to a security paper consisting of at least two paper fiber webs, wherein the first web is embodied in the form of an external we provided with at least one authentication element and the second web comprises a reinforcing element which is substantially absent in the first web and selected amongst materials improving mechanical strength, and/or another authentication element and the authentication element of said first web substantially absent in the second web. A method for producing the inventive security paper is also disclosed.
摘要:
Methods of forming crosslinked cellulose include mixing a crosslinking agent with an aqueous mixture of cellulose fibers containing little to no excess water (e.g., solids content of 25-55%), drying the resulting mixture to 85-100% solids, then curing the dried mixture to crosslink the cellulose fibers. Systems include a mixing unit to form, from an aqueous mixture of unbonded cellulose fibers having a solids content of about 25-55% and a crosslinking agent, a substantially homogenous mixture of non-crosslinked, unbonded cellulose fibers and crosslinking agent; a drying unit to dry the substantially homogenous mixture to a consistency of 85-100%; and a curing unit and to cure the crosslinking agent to form dried and cured crosslinked cellulose fibers. Intrafiber crosslinked cellulose pulp fibers produced by such methods and/or systems have a chemical on pulp level of about 2-14% and an AFAQ capacity of at least 12.0 g/g.
摘要:
A method for improving strength and retention in the manufacture of paper includes providing a composition containing microfibrillated cellulose in a fiber suspension, and from 0.1 to 10 w-% of microfibrillated cellulose by mass of the fiber suspension is added to improve the strength and retention of the product to be formed. A corresponding paper product is also provided.
摘要:
The present invention provides a modified cellulosic fiber having reduced hydrogen bonding capabilities. The modified fiber formed in accordance with the present invention may be useful in the production of tissue products having improved bulk and softness. More importantly, the modified fiber is adaptable to current tissue making processes and may be incorporated into a tissue product to improve bulk and softness without an unsatisfactory reduction in tensile.
摘要:
A method of cleaning residue from a surface using a disposable cellulosic wiper that includes a percentage by weight of pulp-derived papermaking fibers, and a percentage by weight of fibrillated regenerated independent cellulosic microfibers having a characteristic Canadian Standard Freeness (CSF) value of less than 175 ml and having a weight average diameter of less than 2 microns. The wiper is applied, with a predetermined amount of pressure, to a residue-bearing surface. The surface is wiped with the applied wiper, while applying the predetermined amount of pressure, to remove residue from the surface, such that the surface has less than 1 g/m2 of residue after being wiped under the predetermined amount of pressure with the applied wiper.
摘要翻译:使用一次性纤维素刮水器清洁残留物的方法,所述一次性纤维素刮水器包括纸浆衍生的造纸纤维的重量百分比,以及具有特征加拿大标准游离度(CSF)值小于等于的原纤化的再生独立纤维素微纤维的重量百分比 175毫升,重量平均直径小于2微米。 将擦拭器以预定的压力施加到残留物表面。 用施加的擦拭器擦拭表面,同时施加预定量的压力,以从表面去除残留物,使得表面在用施加的擦拭器在预定量的压力下擦拭之后具有小于1g / m 2的残余物 。