Contact person
Nadine Hollinger
Forsknings- och utvecklingsingenjör
Contact Nadine
Analyzes of Cellulose for Dissolving Pulp
By using dissolving pulp as a raw material, textile companies can play an active role in the transition towards a more sustainable and circular economy. By investing in research and development of dissolving fibers and production methods, the industry can contribute to promoting a more sustainable future for textile production and consumption.
Purpose
The quality of dissolving pulp is crucial for the resulting fiber's properties, such as strength, elasticity, and color fastness. Therefore, it is important to carefully characterize and test the pulp before it is used in the production process to ensure that it meets specific requirements and standards for the intended use.
RISE has extensive experience and expertise in the characterization and testing of dissolving pulp and can assist companies in the textile and cellulose industries in evaluating and optimizing their raw materials for the production of high-quality fibres and products.
In the viscose pilot plant, along with the analyses mentioned below, individual pulps, as well as the suitability of various cellulose blends for viscose production, can be evaluated. Screening experiments can be conducted to investigate the influence of different process parameters on various dissolving pulps and to test how well a cellulose performs under given process settings. It is also possible to evaluate different process chemicals, test various additives for fibre properties, and so on.
Analysis Package for pulp
Common pulp analyses:
- α-, β- och γ-cellulose – A widely used course measurement of the distribution of the degree of polymerisation (DP) of the pulp. High values of α-cellulose is seen as favourable.
- Acetone Extract – Low content of material extracted with acetone is favourable, but constant levels can be more preferable to ensure stabile processing. Many surface active additives will show up here.
- Carbonhydrates –Characterisation of the sugar moieties of which the pulp consists, which provides information about e.g. the hemicellulose content.
- Ash content – Measurement of the inorganic content in the pulp.
- Metals (Ca, Mg, Mn, Fe, Cu) – Measurement of the metal content in the pulp (specifically those found to have effect on the processability).
- SiO2 content –Often measured on pulps to ensure levels are below a set threshold, as too much silica can disturb the spinning.
- Lignin content (Klason or acid soluble) – Measurement of the lignin content of the pulp.
- Molecule weight distribution
Delivery
RISE offers a report that includes data in Excel format along with relevant images and diagrams. It is carefully compiled using standard methods for the analyses performed.
If a more detailed report is required, RISE has the capacity to provide a comprehensive scientific report based on the results and background information supplied by the customer, available upon request and quotation.
More information
Particle Size Distribution
For viscose manufacturers, undissolved particles in the viscose solution pose a challenge, as they can clog both the viscose solution filters and the spinneret nozzles in the spinning bath.
We have a complete chain of pilot equipment, covering the entire process from wood to finished viscose fibre, and the demand for our services in this area is increasing.
In addition to measuring particles, the instrument can also analyse cells, such as yeast cells.
The Multisizer 4 particle size analyser from Beckman Coulter operates based on the Coulter principle and can detect particles within a size range of 0.4 to 170 µm. However, with additional modifications, it can measure particles up to 1,600 µm.
Molecular Weight Distribution in Cellulose Products
Molecular weight distribution is an important parameter that provides insight into the chemical structure and properties of a given polymer or substance.
RISE analyses molecular weight distribution in materials such as pulp, carboxymethyl cellulose, polyacrylate, starch, biocides, lignin, black liquor, and hemicellulose.
