Chapter 21

Chapter 21 - • Saturator Excess liquid is squeezed out...

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Chapter 21 – Introduction to Textile Wet Processing Preparation of fabrics for dyeing and finishing: Preparation o The washing and bleaching of materials To remove dirt and sizing (may have been added) To improve absorbency To improve whiteness o For textile wet processing Almost always requires water! Batch vs. Continuous Processing: Based on volume of material Prep CONTINUOUSLY is dyed different colors in BATCHES = finished continuously Continuous process o Continuous range Process separated into individual steps of a batch process Rope from or open width (twisted or held out open) Under tension or without tension If you are manufacturing a large run of fabrics being finished in the same way, you would want to use the batch/continuous process! o Inefficient for short runs Typical batch processing steps: o Padding Fabric is wet (saturated) by dye or chemical or finish solution
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Unformatted text preview: • Saturator Excess liquid is squeezed out • Passed between rollers o Curing (finish is being set/fixed) Chemical reaction takes place • Tenter frame o Is used to hold fabric open and flat as it goes through curing and fixation o Fabric held with clips/pins o Dry heat applied • Steam chamber o Keeps fabric moist and/or excludes oxygen o Dwell times can be <1 minute to even >1 hour o J-box Fabric kept wet o Drying heat • Drying o Required after any wet process o Energy intensive Mechanical methods to remove excess first • Squeezing, vacuum extraction, centrifuging o Tenter frame Greater airflow than in fixation/curing Good final step • Width controlled • Held to create minimal bow or skew Ways to dry: • Thermal Drying o Cloth passed over heated cylinders Dry cans o Pile may be crushed...
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Chapter 21 - • Saturator Excess liquid is squeezed out...

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