摘要:
The invention relates to a method for producing a chemical conversion pulp, which comprises the following steps: obtaining a chemical pulp by conventional pulping methods, at least one alkaline pulping step, in which the chemical pulp is treated with lye and then squeezed out, optionally additional steps of cleaning and/or bleaching the chemical pulp. A least a part of the lye remaining from the alkaline pulping step after squeezing is returned to treat the chemical pulp. The inventive method is characterized in that the content in beta cellulose of at least a part of the lye to be returned is reduced before the chemical pulp is treated.
摘要:
The invention relates to a method for producing cellulose shaped bodies according to the viscose method, said bodies containing a material with ion-exchanging characteristics, which is added to the spinning solution and/or to a precursor thereof. The inventive method is characterised in that the material is added in the form of a dispersion of particles with a maximum grain size of 20 µm.
摘要:
The invention relates to a method for dyeing a mixture of at least two different types of fibre, using at least one dye. Said method is characterised in that the mixture contains a quantity of cationised cellulosed fibres. The invention also relates to fibre blends which can be obtained by means of the inventive method.
摘要:
The invention relates to a cellulose fiber which is characterized by a biological decomposition rate of less than 60 percent after 20 weeks and in which the grade for sensitivity to eurotium rubrum at 85 percent atmospheric humidity is less than 2 after 4 weeks.
摘要:
The invention relates to novel colored cellulosic shaped bodies, especially fibers or films, that comprise a colorant which contains heavy metals and which, according to the cited thermostability test, decreases the increasing temperature of a solution of cellulose in a tertiary aminoxide by a maximum of 10 °C, in particular, by a maximum of 5 °C. The inventive shaped bodies can be produced according to the aminoxide method.
摘要:
The invention relates to a method for producing cellulose fibres. According to said method, a solution of cellulose in a tertiary amino oxide is extruded through the spinning holes of a spinneret and the extruded filaments are fed into a precipitation bath whilst being drawn via an air gap. The filaments are exposed to a gaseous stream in the air gap. The invention is characterised in that the temperature (T) of the gas prior to the contact with the filaments is represented by the formula: 60 °C
摘要:
The invention relates to a process for monitoring a flowing suspension of powdered cellulose in a liquid, aqueous tertiary amine oxide and features the combination of steps: (A) the suspension is inserted into a container with an inlet aperture for the suspension; (B) the suspension in the container is conveyed through it; and (C) the suspension conveyed through the container is extracted therefrom via an outlet aperture; in which (D) the container is weighed and the intake or extraction of the suspension is controlled in accordance with the differences from a predetermined reference value.