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Level 4
Credits 4
Purpose This unit standard is for people working in scouring or a related industry.
People credited with this unit standard are able to describe the types of wools processed in New Zealand and the mechanical principles, operation and functions of the plant used in wool scouring.
Subfield Textiles Manufacture
Domain
Status
Status date
Date version published
Wool Scouring
Registered
25 January 1995
18 July 2008
Planned review date
Entry information
31 December 2010
Open.
Accreditation Evaluation of documentation and visit by NZQA and industry.
Standard setting body (SSB) Competenz
Accreditation and Moderation Action Plan (AMAP) reference 0030
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1 Information to support the learning required for this standard can be obtained from papers and articles published by AgResearch. These may be obtained from
AgResearch at http://www.agresearch.co.nz.
2 Canesis Network Ltd, originally Wool Research Organisation of New Zealand
(WRONZ), is now called AgResearch Textiles.
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Element 1
Demonstrate knowledge of wool production and disposal in New Zealand.
Performance criteria
1.1 Properties of wool are described in terms of the benefits/disadvantages each property contributes to end-products.
Range resilience, water absorption, abrasion resistance, fibre crimp, flame resistance, resistance to soiling.
1.2 New Zealand sheep breeds are identified and their wools described in terms of seasonal availability and end-use.
Range Romney, Perendale, Coopworth, Corriedale, Halfbred, Merino,
Drysdale.
1.3 Wool processing systems are described in terms of their processing sequence.
Range woollen, semi-worsted, worsted.
1.4 Yarn types are described in terms of their characteristics and end-use categories.
Range types – woollen, semi-worsted, worsted; end-use categories – carpets, hand knitting, knitwear, woven fabrics.
Element 2
Demonstrate knowledge of impurities found in wool and describe methods for their removal.
Performance criteria
2.1 Impurities found in greasy wool are described in terms of type and origin.
Range natural, acquired, applied.
2.2 Reasons for opening and dusting greasy wools are described.
Range improvements in subsequent processing, improved scouring, reduced liquor usage and effluent loading.
2.3 Wool openers are described and compared in terms of their function and operation.
Range cyclic opener, double drum opener, step opener-blender, short wool processor, decotter.
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Element 3
Demonstrate knowledge of wool conveying systems.
Performance criteria
3.1 Mechanical wool conveying equipment is described and compared in terms of function, operation, and advantages/disadvantages.
Range belts, mesh mats, spiked lattices.
3.2 Pneumatic wool conveying equipment is described in terms of function and operation.
3.3 Shirley wheel and double drum condenser are described in terms of their function and operation.
3.4 Reasons for removing dust from air and methods of removing dust are described.
Element 4
Range methods reasons
– bag filters, cyclone gravity discharge;
– environmental, contamination, cleanliness.
Demonstrate knowledge of scouring systems.
Performance criteria
4.1 Scouring systems are identified and described in terms of their operating principles.
Range solvent scouring, suint (Duhamel), WRONZ Comprehensive
Scouring System, aqueous.
4.2 Scouring systems are compared in terms of advantages and disadvantages of each system.
Range solvent scouring, suint (Duhamel), WRONZ Comprehensive
Scouring System, aqueous.
4.3 Liquor treatment loop is described in terms of function and operation.
Range WRONZ Liquor Treatment Loop, other treatment equivalents.
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Element 5
Demonstrate knowledge of wool drying.
Performance criteria
5.1 Regain and moisture content are defined according to industry standard definitions.
5.2 Drying principles are described in terms of dryer operation.
5.3 Dryer control is described in terms of methods and equipment used.
Range temperature, moisture measurement, humidity.
5.4 Dryer energy supply and use is described in terms of energy source, safe handling procedures, and advantages/disadvantages in use.
Range gas, steam.
Element 6
Demonstrate knowledge of pressing and packing wool.
Performance criteria
6.1 Wool presses used in wool scouring are described in terms of their function and operation.
Range conventional, dump, high density.
6.2 Wool presses are compared in terms of advantages and disadvantages.
Range conventional, dump, high density.
6.3 Packing material types used for wool are described and compared in terms of advantages and disadvantages.
Range jute, polypropylene.
6.4 Banding of bales is described in terms of the factors that affect the banding operation.
Range band configuration, band thickness, band length.
6.5 Bale branding techniques are identified and compared in terms of advantages and disadvantages in use.
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Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact Competenz info@competenz.org.nz if you wish to suggest changes to the content of this unit standard.
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New Zealand Qualifications Authority 2020