Performance Characteristics of Paper and Boards

These flashcards cover key concepts and definitions related to the performance characteristics of paper and boards.

Cellulose Fibres

The main component of paper and board products, derived from plants.

Bagasse

Shredded sugarcane processed to make paper products after the sweet juice is extracted.

Common sources of cellulose fibers

Wood, Flax, Hemp, Straw, Cotton, Bamboo.

Softwood vs Hardwood

Softwood is more commonly used for paper production due to longer fibres and lower cost.

Pulp

A fibrous liquid produced during the paper-making process, made from cellulose fibres and various chemicals.

Sizing Agents

Chemicals added to pulp to reduce absorbency and improve paper quality.

Gloss

A shiny, high-quality coated paper finish.

Tear Resistance

The ability of paper to resist tearing, influenced by fibre bond strength, fibre length, and fillers used.

Elmendorf Tear Test

A test to measure the force required to tear a sample of paper or board.

Scoring

A process to create a line in paper or board that allows for accurate folds without cutting through.

Perforations

Small cuts in paper or board that facilitate easy tearing or folding.

Coated Paper

Paper treated with an additional layer to enhance smoothness and reduce ink absorption.

Uncoated Paper

Paper that is not treated with sealants, allowing for greater ink absorption.

Impact Resistance

The ability of paper and board to withstand force, crucial for packaging durability.

Whiteness and Brightness

Properties of paper that measure the level of light reflection and overall color quality.

Opacity

The degree to which paper prevents light from passing through.