Abstract:
An electrically insulating composite material is disclosed. The material includes a first portion of a fiber and a second portion of a fibrid, the fiber including a pre-oxidized polyacrylonitrile (PAN) fiber and the fibrid including an aromatic polyamide fibrid. An electrical product including the electrically insulating composite material is also disclosed. A method and an apparatus for producing an electrically insulating composite material are also disclosed. The produced material provides decent electrical properties while keeping the cost low, and thus enabling its use in various electrical applications.
Abstract:
A fire-resistant cellulose material composed of a liquid acid fire-retardant chemical composition or salt derived therefrom, and methods of producing the cellulose material are disclosed.
Abstract:
The present disclosure describes a treated cellulosic material comprising: a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising: a polymer comprising an olefin-carboxylic acid copolymer; a modifying agent comprising a bivalent, trivalent, or tetravalent metal ion.
Abstract:
Die vorliegende Erfindung betrifft einen modifizierten Zellstoff. Der erfindungsgemäße modifizierte Zellstoff enthält zumindest eine Substanz a) ausgewählt aus der Gruppe bestehend aus Tonen, zumindest eine Substanz b) ausgewählt aus der Gruppe bestehend aus monomeren, oligomeren oder polymeren quaternären Ammoniumverbindungen und zumindest eine Substanz c) ausgewählt aus der Gruppe bestehend aus alkoxylierten Fettalkoholen. Die Erfindung betrifft auch die Verwendung des erfindungsgemäßen Zellstoffes zur Herstellung von Zellstoff/Kunststoff-Verbundwerkstoffen.
Abstract:
A method of applying a metallic coating (24) to a surface of a sheet material (20) comprises forming a coating dispersion, the coating dispersion comprising coating particles (10) dispersed in a solvent. The coating particles (10) each comprise a polymeric material (14) and a metallic material (12). A sheet material (20) having a first surface is provided and the coating dispersion is applied to the first surface of the sheet material (20). The coating dispersion is dried to form a coating (24) on the first surface of the sheet material (20), the coating (24) comprising the metallic material (12) dispersed in a layer (22) of the polymeric material (14). The coating dispersion is heated to a temperature of at least 50 degrees Celsius to melt the polymeric material.
Abstract:
The present invention relates toa method of producing precipitated calcium carbonate (PCC) where a retention/strength enhancing chemical is added to milk of lime to form a mixture thereof prior to adding the mixture of the retention/strength enhancing chemical and milk of lime to paper making stock in a pipeline leading to a headbox of a paper making machine, whereafter carbon dioxide is introduced to the paper making stock, and the carbonation reaction between milk of lime and carbon dioxide is allowed to proceed in the presence of both fibres and the retention/strength enhancing chemical.
Abstract:
The invention is directed to methods and compositions for reducing the deposition of pitches and stickies in a papermaking process. The method involves introducing an anionic glycerol-based polymer to the papermaking process. This anionic polymer prevents the pitches and stickies from depositing and agglomarting in papermaking processes.
Abstract:
Methods for making and using aqueous dispersions for imparting grease/oil resistance to paper, paperboard and cellulose fiber products generally are provided. In particular, there are provided aqueous colloidal dispersions comprising nanoparticles of at least one colloidal clay and an aqueous fluorochemical, which can be applied to, on, or in paper, paperboard and cellulose fiber products. The paper and products that have been modified using these aqueous dispersions have good resistance to oil and grease penetration with lower overall amounts of aqueous fluorochemicals being required. Additional methods for imparting grease/oil resistance to paper, paperboard and cellulose fiber products generally are provided. In particular, there is provided a process for improving the oil and grease resistance of a cellulose fiber material, the process comprising: a) applying a pretreatment composition comprising a cationic polymer to a cellulose fiber material in a size press to form a pretreated cellulose substrate; b) drying the pretreated cellulose substrate; and c) applying a fluorochemical composition to the dry pretreated cellulose substrate to form an oil-repellent cellulose fiber material.
Abstract:
Provided herein are filler suspensions comprising an ionic starch, a complementary ionic coadditive and filler particles. Pulp furnishes comprising the filler suspensions and paper comprising the pulp furnish are also provided. Processes for making the filler suspensions and processes for their use in manufacturing paper are also provided.