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Language: English
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Forming (Tissue) Series (Details)Includes 1 courses for $99/year. Tissue Library (Details)Includes 31 courses for $699/year.
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Training Time: 20 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English
Tissue machine forming fabrics are designed to retain as much fiber and other furnish components as possible while allowing water to drain through them as quickly as possible. These fabrics are typically produced from monofilament strands or yarns that are woven together in a pattern that can be classified by their fabric style (or weave); mesh, count, and diameter; surface topography; and air permeability. This module discusses how each of these characteristics affect final sheet quality.
At the end of this module, you will be able to:
The following key questions are answered in this module:
What are the two main jobs of a forming fabric?To retain as much fiber and other furnish components as possible, and to allow water to drain through as quickly as possible.
What are the most common fabric styles or weaves used in forming fabrics? Double layer fabrics are commonly used, but another style might be chosen based on trial work and experience.
What is the difference between "mesh" and "count"?Mesh refers to the number of MD yarns per inch of fabric, while count refers to the number of CD yarns per inch of fabric.
Why can't air permeability (which measures air flow) be used alone to predict the drainage capacity of a fabric?Because it does not take into account the impact of the fibers and furnish on drainage. Surface topography and fabric construction both affect furnish retention and so can also affect the dewatering capacity of the fabric.
What four of characteristics must be considered during forming fabric selection?Weave pattern; mesh, count, and yarn diameter; surface topography; and air permeability must be considered.
Below is a transcript of the video sample provided for this module:
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