Contact person
Christina Wedin
Coordinator
Contact Christina
Age resistance of cellulose products
Everything ages and some products need to retain their properties longer to live up to their area of use. To be competitive, age resistance needs to be measured as a quality measure for a high-quality product.
Purpose
Age resistance can be measured in many different ways depending on what the product is to be exposed to and what requirements there are from the buyer and the user. There are standardized methods, but it is also possible to develop methods according to wishes. Some instruments that are often used are these:
- Climate chamber
- Accelerating aging at different lights
- Aging when freezing
- Hysteresis
It is possible to measure very many properties during the aging process. Strengths and optical properties are common but it is possible to add others as well.
Method
Aging resistant paper (ISO 9706)
- Neutral glue
- pH value between 7.5 and 10.0
- Have an alkali reserve of less than 0.4 moles of acid per kg of paper (less than 2% chalk or equivalent)
- Have tear strength over 350 mN
- Have kappa numbers less than 5, ie the paper may only contain a limited amount of oxidizable material (eg lignin)
Aging resistant paper (ISO 11108)
- made from cotton, cotton linters, hemp or flax but may contain a small amount of fully bleached chemical pulp
- Folding strength less than 2.18 (weight over 150)
Certificate
- Age resistance for
- Document paper
- Archive paper
- Color fastness
- DIN 6738 Life span on paper and paper board
- ICN
Deliveries
Report
Facts
Service
Age resistance of cellulose products secures the products
Innovation area
Biorefinery, Packaging, Pulp and paper
Delivery level
Non-accredited
Price
Price on tender
Delivery time
Delivery of results takes place based on order backlog and the scope and complexity of the assignment.
Preparations
No preparation needed
Supports the UN sustainability goals
9. Industry, innovation and infrastructure
12. Responsible consumption and production
