NZQA registered unit standard
4177 version 7
Page 1 of 3
Title
Demonstrate knowledge of textile fibre blending
Level
4
Credits
20
Purpose
People credited with this unit standard are able to demonstrate
knowledge of: fibre blending; blending system machinery; and
blending additives and their application.
Classification
Textiles Manufacture > Core Yarn Processing
Available grade
Achieved
Explanatory notes
None.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of fibre blending.
Evidence requirements
1.1
Blending systems are described and compared in terms of benefits and
disadvantages.
Range
1.2
Blending systems are described in terms of factors that influence the selection
and suitability of the blending system.
Range
1.3
types of fibre being blended, batch size, component quantity in
proportion to batch size, and machine and system availability.
Fibre blending is described in terms of process objectives.
Range
1.4
pile or stack, batch, continuous, multiple binning.
yarn performance characteristics, mixing or blending fibre, special
technical fibres, add-effect fibres, and optimisation of processing
performance and cost.
Blend component proportions and costs are calculated, using industry standard
methods.
Range
Competenz
SSB Code 101571
standard methods – cost of blend from components of known cost,
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
4177 version 7
Page 2 of 3
blend of given cost by allocating components of known cost.
Outcome 2
Demonstrate knowledge of blending system machinery.
Evidence requirements
2.1
A weigh box or scale system, a weigh conveyor, and an automated bale
opening and weighing system are described in terms of function and operation.
2.2
Machines used in blending systems for opening and dusting are described in
terms of function and operation.
Range
2.3
Pneumatic fibre transfer equipment is described in terms of function and
operation.
Range
2.4
cyclic opener, fearnought, disc opener, step blender, rotary
blender.
fans, ducting, switches, condenser, rotary spreader.
Bin unloading devices are described in terms of function and operation.
Range
suction, spiked lattice.
Outcome 3
Demonstrate knowledge of blending additives and their application.
Evidence requirements
3.1
Additives applied to fibre during blending are described in terms of their nature
and function
Range
3.2
water, processing lubricants, anti-stats, fugitive dyes.
Processing lubricants are described and compared in terms of type, properties,
and processing characteristics.
Range
lubrication, emulsion stability, flash point, effect on machines and
component wear, viscosity, solubility in water, activity, pH.
3.3
Additive application information is calculated in terms of quantity required,
emulsion mix, and application rate.
3.4
Additive application systems are described in terms of function and operation.
Range
Competenz
SSB Code 101571
open emulsion spray, enclosed emulsion spray, enclosed
atomised spray, automated systems.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Planned review date
4177 version 7
Page 3 of 3
31 December 2021
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
18 June 1995
31 December 2019
Revision
2
8 August 1997
31 December 2019
Revision
3
18 July 2000
31 December 2019
Revision
4
10 October 2001
31 December 2019
Revision
5
12 August 2004
31 December 2019
Review
6
23 April 2008
31 December 2019
Review
7
19 May 2016
N/A
Consent and Moderation Requirements (CMR) reference
0030
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR 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.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016