摘要:
A method for the production of paper, cardboard and card by adding a microparticle system consisting of a polymer retention agent having a molar mass Mw of at least 2 million and a fine-part inorganic component in order to form a paper material having a material density of a 20 g/l maximum and by dewatering the paper material, wherein the paper material undergoes at least one shearing step prior to or after addition of the retention agent and wherein the retention agent is introduced in a dosed manner into the paper material in at least two places and the fine inorganic component is dosed prior to or after addition of the retention agent or between two dosing points for the retention agent.
摘要:
The invention relates to a method for producing paper, paperboard and card board by adding (i) at least one retention agent and (ii) organic, ionic and uncrosslinked microparticles which are water-insoluble and whose mean particle size is less than 500 nm and whose ionic polymerisable monomer content is less than 1 % by weight or organic, ionic and uncrosslinked microparticles which are water-insoluble and whose mean particle size is less than 500 nm and whose ionic polymerisable monomer maximum content is equal to 10 % in weight obtainable by monomer polymerisation in the presence of silicon, waterglass, bentonite and/or the mixture thereof into a pulp and by dehydration of said pulp on a sieve.
摘要:
The invention relates to the use of fine-particle polymer powders, containing at least one UV absorber for the stabilisation of polymers, in particular, polyolefins, against the effects of UV radiation. The invention further relates to stabiliser mixtures for the stabilisation of polymers against the effects of UV radiation, oxygen and heat, comprising, amongst others, said polymer powders and a method for the stabilisation of polymers, in particular, polyolefins against the effects of UV radiation, oxygen and heat, characterised in that effective amounts of said stabiliser mixtures are added to the polymers, in particular, the polyolefins. Furthermore, the invention relates to polymers stabilised against the effects of UV radiation, oxygen and heat, in particular, polyolefins, which comprise an effective amount of said polymer powders or stabiliser mixtures and objects produced from said stabilised polymers in particular, polyolefins.
摘要:
The invention relates to a method for producing paper with a high substance weight. According to said method, a paper material is dewatered on a screen in the presence of a combination of at least two polymers that act as a retention and dewatering agent system, forming sheets, which are then dried. The sheet formation takes place without the use of fine-particled inorganic flocculants and (a) at least one polymer containing amino groups and (b) at least one branched cationic polyacrylamide are used as the retention and dewatering agent.
摘要:
The present invention relates to water soluble radiation activatable polymer resin formulations which are suitable to modify the absorption properties of fibrous materials and the polymer obtained by such radiation activatable polymer resins and the method of preparing such polymer. Fibrous materials made with radiation activatable resin formulations according to this invention are especially suitable for use in disposable absorbent articles.