GB/T 6673-2001 PDF English
US$130.00 · In stock · Download in 9 secondsGB/T 6673-2001: Determination of length and width of plastics film and sheeting Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 6673: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 6673-2001 | English | 130 |
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Determination of length and width of plastics film and sheeting
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| GB/T 6673-1986 | English | 199 |
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Plastics--Film and sheeting--Determination of length and width
| Obsolete |
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GB/T 6673-2001: Determination of length and width of plastics film and sheeting---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT6673-2001
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 83.140.10
G 31
Replacing GB/T 6673-1986
Determination of length and width of plastics film and
sheeting
(idt ISO 4592.1992)
Issued on: OCTOBER 24, 2001
Implemented on: MAY 1, 2002
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC.
Table of Contents
Foreword... 3
ISO Foreword... 4
1 Scope... 5
2 Reference method for measurement of the length of a roll... 5
3 Reference method for measurement of the width of a film or sheeting... 7
Foreword
This standard is a revision of GB/T 6673-1986 Plastics - Film and sheeting -
Determination of length and width.
This standard is identical to the international standard ISO 4592.1992 Plastics - Film
and sheeting - Determination of length and width. Except for some editorial
modifications, it is identical to ISO 4592.1992 in terms of technical content and writing
method.
Compared with the previous version, the main changes in this standard are as follows.
1.The test method for "random" length and "random" width of plastic films and
sheeting specified in the previous version of the standard shall be revised to
the test method for "free" length and "free" width of plastic films and sheeting.
2.The chapter "Precision" is added.
3.In terms of writing format, the two parts of the determination of the length and
width of plastic films and sheeting in the previous version of the standard are
combined.
This standard replaces GB/T 6673-1986 from the date of implementation.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Plastic
Products of Standardization Administration of China.
The responsible drafting organization of this standard is the Institute of Plastic
Processing and Application of Light Industry; the participating drafting organization is
the Tianjin Plastics Research Institute.
The main drafters of this standard are Chen Qian and Qiang Xuan.
Determination of length and width of plastics film and
sheeting
1 Scope
1.1 This standard covers test methods for measuring the "free" length of rolls of plastic
films and sheeting (see Chapter 2).
This method is applicable to film and sheet rolls with a length of less than 100 m and
serves as a reference method for verifying other measurement methods. Any other
length measurement method can be used as long as the measurement results are the
same as those of this method. If an automatic measuring device is used, the
measurements made for each plastic film and sheeting shall be verified according to the
steps specified in this method.
Since this method is relatively complicated, in the case of long rolls, when calibrating
the above-mentioned other measurement methods, it is allowed to use a plastic film or
sheeting about 100 m long measured by this method for calibration.
1.2 This standard also specifies the test method for measuring the average width of
plastic film and sheeting rolls, and the test method for measuring the width of plastic
film or sheeting specimens with a width of more than 5 mm (see Chapter 3). If the
specimen width is only slightly greater than 5 mm, the measurement accuracy of this
method is only 2%. This method specifies two procedures for measuring the width, and
which procedure shall be used depends on the width of the sample.
This method covers the test method for measuring the "free" width of rolls of plastic
films or sheeting.
This method is a reference method for verifying other measurement methods. Any other
width measurement method can be used as long as its measurement results are the same
as this method. If an automatic measuring device is used, the measurement of each
plastic film and sheeting shall be verified according to the steps specified in this method.
2 Reference method for measurement of the length of a roll
2.1 Apparatus
2.1.1 Sharp knife or razor.
2.1.2 Metal scale or profile. The length is greater than the width of the measured roll.
2.1.3 Flat surface. The length shall be at least 10 m, and the width shall be at least equal
to the width of the roll to be measured. There shall be a scale every 1 m along the two
longitudinal edges, and at least one edge shall be marked to 0.1 m.
2.2 Procedure
2.2.1 Unroll the film or sheeting into a stacked structure, with each layer not exceeding
5 m in length and no more than 20 layers stacked together, as the material to be
measured. Before measuring the length, the material shall be kept in this stacked state
for at least 1 hour.
2.2.2 Pick up the uppermost cut end of the material and spread it on a flat surface (2.1.3),
applying minimal tension to the material.
NOTE 1.One method of achieving the above requirement is to pass the film or sheeting over a freely
rotatable roller bearing assembly approximately 30 cm above the flat surface used to measure the material.
Align the cut end of the material with the zero mark on the flat surface. If necessary,
trim the end with a sharp knife or razor (2.1.1) and a metal scale or profile (2.1.2). Make
the metal scale or profile perpendicular to the longitudinal direction of the material.
This trimming of the end shall be limited to the minimum. At the other end of the flat
surface, align the material with the scale of the known length of the flat surface and
mark both sides of the material.
2.2.3 Move the material on the flat surface so that the marked point coincides with the
zero scale of the flat surface, and repeat the above steps to mark the other end of the
material.
2.2.4 Repeat the above steps until the entire roll of material passes through the flat
surface and is measured. If necessary, the final cut end can be trimmed in the same way
as the initial cut end.
2.2.5 The measured length shall be accurate to 0.1 m. The sum of all measured lengths
shall be reported as the roll length in meters, accurate to 0.1 m.
2.3 Precision
The precision of this test method is unknown because inter-laboratory data are not
available. A description of the precision will be included in a future revision when inter-
laboratory data become available.
2.4 Test report
The test report shall include.
a) Number of this standard;
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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