GB/T 1690-2010 PDF in English
GB/T 1690-2010 (GB/T1690-2010, GBT 1690-2010, GBT1690-2010)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 1690-2010 | English | 85 |
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Rubber, vulcanized or thermoplastic -- Determination of the effect of liquids
| Valid |
| GB/T 1690-2006 | English | 160 |
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Liquid test methods vulcanized rubber or thermoplastic rubber resistance
| Obsolete |
| GB/T 1690-1992 | English | 479 |
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Rubber, vulcanized-Determination of the effect of liquids
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Standards related to (historical): GB/T 1690-2010
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GB/T 1690-2010: PDF in English (GBT 1690-2010) GB/T 1690-2010
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 83.060
G 40
Replacing GB/T 1690-2006
Rubber, vulcanized or thermoplastic –
Determination of the effect of liquids
(ISO 1817:2005, Rubber, vulcanized –
Determination of the effect of liquids, MOD)
ISSUED ON: JANUARY 14, 2011
IMPLEMENTED ON: DECEMBER 01, 2011
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of contents
Foreword ... 3
Introduction ... 6
1 Scope ... 8
2 Normative references ... 8
3 Test device ... 9
4 Test liquids ... 11
5 Test pieces ... 12
6 Temperature and duration of test liquid immersion ... 14
7 Procedures ... 14
8 Test report ... 22
Appendix A (Normative) Reference liquid ... 24
Appendix B (Normative) Reference liquid ... 28
Rubber, vulcanized or thermoplastic –
Determination of the effect of liquids
WARNING: Personnel using this standard shall be familiar with normal
laboratory practice. This standard does not purport to address all of the safety
problems, if any, associated with its use. It is the responsibility of the user to
establish appropriate safety and health practices AND to ensure compliance
with any national regulatory conditions.
1 Scope
This standard specifies the methods of evaluating the resistance of vulcanized
and thermoplastic rubbers to the action of liquids by measurement of
properties of the rubbers before and after immersion in test liquids. The liquids
concerned include current service liquids, such as petroleum derivatives,
organic solvents, and chemical reagents, etc.
This standard applies to vulcanized rubber or thermoplastic rubber.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this Standard.
GB/T 262 Petroleum products and hydrocarbon solvents - Determination of
aniline point and mixed aniline point (GB/T 262-2010, ISO 2977:1997,
MOD)
GB/T 265 Petroleum products - Determination of kinematic viscosity and
calculation of dynamic viscosity
GB/T 267 Petroleum products - Determination of flash point and fire points -
Open cup
GB/T 388 Determination of sulfur content of petroleum products (oxygen
bomb method)
The test piece used for measuring dimensional change may be type I or type II,
AND it may also select the round test piece of diameter 44.6 mm (Inner circle
of the type A standard ring test piece in GB/T 528).
The test piece used for measuring surface area change is a vertically cut
parallelogram. This can be achieved by two consecutive cuts at approximately
right angles to each other, with a cutter consisting of two parallel blades,
suitably spaced. The length of the test piece sides shall be nominally 8 mm.
Note: For the determination of the change in surface area, it might by
convenient to use smaller or thinner test pieces, for example when cut from
products OR fast detection test is required. However, the results might not be
comparable with those obtained using the specified thickness. Smaller test
pieces will reduce the precision of the results.
Test pieces for the determination of tensile properties shall be in accordance
with the provisions of GB/T 528. Type 2 dumb-bell like test pieces are
preferred. AND this test piece may also be used for the determination of
hardness change.
For tests with liquid contact on one surface only, the test piece shall consist of
a disc with a diameter of about 60 mm.
5.3 Time interval between vulcanization and testing
Unless otherwise specified, the time interval between the vulcanization and
test shall be as specified in GB/T 2941 as below.
For all test purposes, the minimum time between vulcanization and testing
shall be 16 h.
For non-product tests, the maximum time interval between vulcanization and
testing shall be 4 weeks AND, for evaluation intended to be comparable, the
tests shall be carried out using, as far as possible, the same time interval.
For product tests, whenever possible, the time interval between vulcanization
and testing shall not exceed 3 months. In other cases, the tests shall be made
within 2 months of the date of receipt of the product by the customer.
5.4 Test piece conditioning
The test piece shall be conditioned for at least 3 hours at the standard
laboratory temperature as specified in GB/T 2941. AND the same temperature
shall be used throughout any test or any series of tests intended to be
comparable.
USE 3 test pieces for each set of measurements and MAKE any identification
marks required before immersion.
IMMERSE the test piece in a device (3.1 or 3.2) containing the test liquid (4);
PLACE the device a thermostatic chamber or a liquid heating thermostat which
has reached the desired temperature (6.1).
For full immersion tests, PLACE the test pieces at a distance of at least 5 mm
from the sides of the vessel AND at least 10 mm from the bottom and top
surfaces. If the density of the rubber is less than that of the liquid, means shall
be provided for holding the test pieces completely below the surface of the
liquid. The ingress of air shall be avoided. If the influence of air is to be tested,
the degree of access of air shall be determined by agreement between the
interested parties.
After the soaking test, TAKE the test device out from the incubator or the liquid
heating thermostat; CONDITION it at standard laboratory temperature for 30
min. Or otherwise quickly TRANSFER the test piece into a prepared new test
liquid at this temperature and ALLOW it to stand for a period of 30 min.
REMOVE surplus test liquid from the test piece surface. When volatile liquids
are used, REMOVE and quickly WIPE the test pieces with a filter or a piece of
lint-free fabric. Viscous non-volatile liquids can be removed by filter paper AND,
if necessary, by quickly immersing the test pieces in a volatile liquid, such as
methanol or petroleum ether, then quickly wiping them. And then PERFORM
the performance tests.
Following removal of the test pieces from volatile test liquids, it is important
that each subsequent manipulation takes place as soon as possible. After
wiping off the surface residual liquid from the test pieces, quickly PLACE the
test pieces into the weighing bottles to determine the volume change and mass
change of the rubber. After the determination, if the same test pieces are used
for the measurement of other properties, IMMERSE the test piece in this
volatile liquid again, with the immersion duration complying with the
requirements of 6.2. AND the maximum time between removal from the test
liquid and the completion of all properties determination shall be:
- Change in dimensions: 1 min;
- Change in hardness: 1 min;
- Tensile test: 2 min.
If the test is to be continued, quickly IMMERSE the test piece in the liquid
again and RETURN them into the incubator or liquid temperature control
device.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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