List of Waste in Spinning Mill (Blowroom, Carding, Drawframe, Combing, Simplex and Ring Frame)

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Last Updated on 20/07/2022

What is Waste / Wastage?
Waste is type of material which has not in use, discarded some waste are useful some are not useful. The action or process of losing or destroying something by using it carelessly or extravagantly. Waste includes all items that people no longer have any use for, which they either intend to get rid of or have already discarded. Some waste are usable which are used for the courser count yarn, open-end rotor spinning etc.

In practical,

Input – Output = Waste

spinning mill waste

List of Waste in Spinning Mill (Blowroom, Carding, Drawframe, Combing, Simplex and Ring Frame)
The waste generated in the spinning mill can be categorized as reusable waste or soft waste, cleaning waste, and microdust. The wastes such as lap bits, sliver bits, roving ends, pneumafil waste, and lapping waste obtained from each department of spinning process are termed as reusable waste or soft waste. These wastes can be collected from each department and can be fed back into the mixing or blowroom process in recommended proportion.

Types of Waste in Spinning Mill:
The waste occurring in the spinning mill can be classified normally as

  1. Soft waste and
  2. Hard waste

Soft waste is reusable in the spinning process, whereas hard waste is not reusable. Soft wastes generated in the carding process are classified as lap bits, web waste, and sliver waste. The occurrence of soft waste should be controlled to avoid unnecessary reprocessing of good fibers, which leads to fiber damage. The major reasons attributed for the generation of soft waste in carding are poor feed material quality, poor material handling, higher production speed, wrong settings, air current disturbances in the web delivery zone, poor work practices, wrong selection of sliver trumpet, and improper ambient conditions.

List of Blowroom Waste:

  1. Droping-1
  2. Droping-2
  3. Seeds
  4. Leafts
  5. Dust
  6. Lapcut
  7. Filter waste
  8. Filter dust
  9. Floor sweep

List of Carding Waste:

  1. Modes and flyer
  2. Flat strip
  3. Taker in waste
  4. Sliver cut
  5. Filter waste
  6. Filter dust
  7. Floor sweep

Draw Frame Waste:

  1. Filter waste
  2. Bonda
  3. Sliver cut

List of Waste in Combing:

  1. Noil: As per desired and quality of the end product to be produced.
  2. Minilap Wastage: 0.25%
  3. Sliver Wastage : 0.25%
  4. Roller Wastage : 0.25%
  5. Fly Dust: 0.10%
  6. Sweeping: 0.20%

Waste in Simplex / Roving Frame:

  1. Sliver
  2. Roller Waste/Bonda
  3. Pneumaphil Waste
  4. Roving Waste
  5. Sweeping Waste
  6. Clearer waste
  7. Invisible Waste

Note: Above 0.50% of total amount of waste is not acceptable

Waste in Ring Frame:

  1. Pnemaphil: 0.20-0.30%
  2. Bonda: 0.20-0.30%
  3. Roving waste: 0.10-0.20%
  4. Thread waste: 0.10-below
  5. Fly dust: 0.20%
  6. Sweeping waste: 0.20%

Note: Total wastage is not more than 1%

You may also like:

  1. Blowroom: Objectives, Functions and Operations
  2. Cotton Yarn Spinning Process Step by Step
  3. Ring Spinning Machine: Drafting System, Different Parts and Functions
  4. Recent Developments of Ring Frame Machine
  5. Overview of Digital Autoleveller in Draw Frame
  6. Recent Developments of Simplex Machine

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