FZ/T 07007-2020Minimum allowable values of water efficiency and water efficiency grades for dyeing machine (English PDF)

1 Scope

This Standard specifies minimum allowable values of water efficiency, water efficiency grades and test methods for various dyeing machine (hereinafter referred to as dyeing machine).

This Standard is applicable to evaluation on water efficiency for dyeing machine.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 8170, Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 9995-1997, Determination of moisture content and moisture regain of textile - Oven-drying method

FZ/T 01024, Instrumental assessment of change in colour for determination of grey scale rating

FZ/T 90112-2018, Testing method of dyeing ratio for dyeing machine

3 Terms and definitions

3.1 dyeing machine the equipment used for dyeing and producing small batches of textiles using the dip dyeing process according to the prescribed procedures

3.2 constant mass weigh the textile materials at specified time intervals during the drying process;

when the difference between the mass of two consecutive weighings is less than 0.1% of the mass of the last weighing, the mass of the latter weighing is

Q - Water efficiency for dyeing machine, in cubic meters per ton (m3/t);

W - Total water consumption during dyeing, in cubic meters (m3); see 6.4.2 for measurement method;

M - Total mass of fabric during dyeing, in kilograms (kg); see 6.4.1 for measurement method.

7 Test report

The test report of water efficiency for dyeing machine includes the following:

a) Basic information of the equipment to be tested: name, model specification, exit-factory number and production date;

b) Test fabric varieties, fiber composition, specifications, color requirements;

c) Equipment name and model;

d) Test methods and measurement parameters used (liquid injection or drainage measurement method, fabric mass, dye liquor mass);

e) Basic condition of test process;

f) Measurement calculation table of water efficiency for dyeing machine;

g) Determination report table of water efficiency for dyeing machine;

h) Evaluation conclusion of water consumption of dyeing machine;

i) Testers, reviewers, approvers, test dates.

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