PULP PAPER Flashcards
What is the primary material used to make paper?
Pulp of woods
Paper is considered an eco-friendly product.
List the steps involved in the paper-making process.
- Pulping procedure
- Refining procedure
- Dilution process
- Formation of fibers
- Pressurization
- Drying
- Finishing procedure
What are some alternative materials that can be used to make paper?
- Rags
- Flax
- Cotton linters
- Bagasse
True or False: Hemicellulose contributes to fiber-to-fiber bonding in papermaking.
True
What type of wood fibers contribute strength to paper?
Softwoods
Examples include pines, firs, and spruces.
Fill in the blank: The pulping process aims to remove ______ without losing fiber strength.
lignin
What are the characteristics of hardwood fibers in paper production?
They produce a weaker paper due to shorter fibers.
What is the main purpose of the bleaching process in papermaking?
To produce light-colored or white papers.
List some chemicals used in the bleaching process.
- Chlorine dioxide
- Sodium hypochlorite
- Hydrogen peroxide
- Oxygen
What is the role of sodium hydroxide in the bleaching process?
To extract dissolved lignin from fiber surfaces.
Describe the process of fiber separation in pulping.
Chips are digested with steam and chemicals to separate fibers and dissolve lignin.
What is the purpose of the refining stage in papermaking?
To cut fibers and roughen their surfaces for better bonding.
Fill in the blank: A dilute suspension of cellulose fibers in water is drained through a ______ to form paper.
sieve-like screen
What happens during the drying stage of paper production?
Water is removed to achieve a flat, uniform, and strong sheet of paper.
True or False: Handmade paper is produced using the same machinery as industrial paper.
False
