




Tissue Roll Converting Overview
There are several processes involved in converting parent rolls of tissue into packaged consumer-sized rolls. This module will introduce you to the equipment and processes used to make rolled tissue products including Unwinding, Printing, Embossing, Rewinding, Tail Sealing, Core Making, Log Accumulating, Log Saws, Wrapping, Bundling, Case Packing, Palletizing, and Stretch Wrapping. Converting safety topics are also covered.
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Learning Objectives
• Describe the purpose of a converting line
• Describe the processes and machines used to convert tissue rolls
• Explain the flow of materials through the line
• Identify safety hazards present and describe guidelines for working safely around converting equipment
Specs
Course Level | Intermediate |
Languages | English |
Compatibility | Audio, Video |
Based on: | Industry Standards and Best Practices |
Key Questions
What is converting?
Converting is a series of discrete operations with multiple pieces of machinery that turn large parent rolls into consumer-sized units of saleable product.
Why is tissue embossed?
Embossing increases the thickness of the combined sheet, increases the absorbency, and adds a decorative pattern.
What is the purpose of the accumulator?
The accumulator provides a place to store logs so the rest of the line can continue to run for short periods of time when another machine is not running.
What is a log?
Logs are full-width, consumer diameter rolls wound on a core in the rewinder. Logs are later cut into smaller bath tissue or paper towel rolls in a log saw.
What are some safety hazards associated with converting?
There are many hazards in converting, including dust, sharp objects (especially log saw blades), moving and rotating parts, and nips.
Sample Video Transcript
The unwind is the first piece of machinery in the converting line, and its purpose is to unwind parent rolls of tissue and provide an uninterrupted supply of tissue to the rewinder. Some machines have only one unwind stand. So there is a short time period required to change out parent rolls. To provide an uninterrupted supply of tissue to the rewinder, many unwinders have two unwind stands. This allows one roll to be staged and prepared, while the other is being unwound at full speed. When one parent roll is almost depleted, an automatic splicing assembly splices the sheet from the consumed roll to the sheet from a new roll without stopping the machine. Two-ply sheets require two unwind stations to supply both sheets simultaneously. On lines with a printer, a print pattern is imparted to the sheet prior to being laminated in an embosser or rewound in the rewinder.
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