NZQA Expiring unit standard
3135 version 8
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Title
Process sliver or top in a backwash
Level
3
Credits
6
Purpose
This unit standard is for people working in top making or semiworsted processing. People credited with this unit standard are
able to: describe the function and operation of a backwash; setup and operate the backwash to produce product to
specification; explain and carry out chemical processes and
chemical handling procedures; and maintain a clean machine
and work area.
Classification
Textiles Manufacture > Top Making, Semi-Worsted and
Worsted Processing
Available grade
Achieved
Explanatory notes
1
Plant safety practices comply with Health and Safety in Employment Act 1992 and
workplace procedures.
2
Workplace productivity and quality requirements will be met.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of processing carried out in a backwash.
Evidence requirements
1.1
Backwash sections are described in terms of their function and operation.
Range
1.2
Backwash chemical treatments are described in terms of treatment method and
reasons for treatment.
Range
1.3
creel, bowls, dryer, chemical addition.
insect resist, chlorination, resin application, softening, bleaching,
pH control.
Liquor and chemical discharge, and disposal procedures are described in terms
of plant and local authority regulations.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
1.4
3135 version 8
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Chemical spillage emergency procedures are described in terms of plant and
local authority requirements.
Outcome 2
Prepare chemicals for backwash processing.
Evidence requirements
2.1
Chemicals are identified and confirmed with work instructions.
2.2
Chemicals are prepared according to workplace procedure, work instructions
and plant safety requirements.
2.3
Chemicals batches prepared for stock are tested according to workplace
requirement to confirm that batch meets specification.
Outcome 3
Set up backwash for processing.
Evidence requirements
3.1
Backwash is prepared for operation according to work instructions and plant
procedure.
Range
sliver or top identified, creel loading and machine thread up, feed
rate, bowl conditions, squeeze press operation, dryer conditions,
initial chemical charges, chemical addition controls, liquor flows.
Outcome 4
Process and monitor sliver during backwash processing.
Evidence requirements
4.1
Backwash and associated equipment is operated according to operating
procedures, process and safety requirements.
4.2
Process conditions are monitored and maintained during processing according
to process requirements and work instructions.
4.3
Samples are taken for testing according to process and work instructions.
4.4
Test results are assessed and machine and chemical adjustments made to
achieve product quality.
Outcome 5
Clean backwash and work area.
Evidence requirements
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3135 version 8
Page 3 of 3
5.1
Bowls and chemical stock tanks are emptied and cleaned according to
operating procedures and local authority discharge requirements.
5.2
Backwash area is kept clean and waste fibre collected and sorted according to
type according to workplace procedure.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
3 April 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
Rollover and
Revision
6
25 July 2007
Rollover
7
21 May 2010
31 December 2019
Review
8
19 May 2016
31 December 2019
31 December 2019
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.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016