GB/T 31556.2-2015 PDF in English
GB/T 31556.2-2015 (GB/T31556.2-2015, GBT 31556.2-2015, GBT31556.2-2015)
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Packaging sacks -- Description and method of measurement for dimension -- Part 2: Sacks made from thermoplastic flexible film
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Standards related to (historical): GB/T 31556.2-2015
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GB/T 31556.2-2015: PDF in English (GBT 31556.2-2015) GB/T 31556.2-2015
Packaging sacks.Description and method of measurement for dimension.Part 2. Sacks made from thermoplastic flexible film
ICS 55.080
A82
National Standards of People's Republic of China
Bag size and measurement methods described
Part 2. thermoplastic flexible film bag
Published 2015-05-15
2016-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Foreword
GB/T 31556 "bag size and measurement method described in" divided into two parts.
--- Part 1. paper;
--- Part 2. flexible thermoplastic film bag.
This is Part 2 GB/T 31556's.
This section drafted in accordance with the rules GB/T 1.1-2009 given.
This re-use part of the drafting process using modified ISO 6591-2. 1985 "and the measuring method described in bags - Part 2. Air heat
Flexible plastic film bag. "
This part of ISO 6591-2. 1985 and technical differences the following reasons.
--- measuring method prescribed sampling deleted, and the "sample pouches measuring at least 10" to "measure at least twice."
This part of the proposed and managed by the National Packaging Standardization Technical Committee (SAC/TC49).
This section was drafted. building materials industry and technical supervision research center, Chaozhou City, Guangdong Province, measuring the quality of supervision and detection.
The main drafters of this section. Chen Bin, Zhao Tingting, Yang Yun, the car pound, Yang Ting, Ganxiang Chen.
Bag size and measurement methods described
Part 2. thermoplastic flexible film bag
1 Scope
GB/T 31556 specifies the section of this flexible thermoplastic film bag size of terms and definitions described size, measurement and test reports.
This section applies to flexible thermoplastic film bag predetermined GB/T 17858.2, that is made of a soft thermoplastic monolayer film processing
Or multi-ply bag, this does not apply to retail packaging bag.
2 Normative references
The following documents for the application of this document is essential. For dated references, only applies to the version dated paper
Pieces. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 17858.2 terminology and type bags Part 2. thermoplastic flexible film bag (GB/T 17858.2-2010, ISO
6590-2. 1986, MOD)
3 Terms and Definitions
GB/T 17858.2 and define the following terms and definitions apply to this document.
3.1
Bag length lengthofsack
The distance between the lateral edges of the bag, the bag bottom is perpendicular to the direction of measurement from the intermediate bag.
3.2
Bag width widthofsack
The distance between the longitudinal edges of the bag, the bag bottom parallel to the direction of measurement from the intermediate bag.
3.3
Hem wide widthofgusset
Expand the hem flange outer distance between the two.
3.4
Bag bottom width widthofbottom
The distance between the two bag bottom hemming, measured parallel to the longitudinal direction of the bag from the middle bottom of the bag.
3.5
Port width widthofvalve
The distance between the port or two hemming inner valve sleeve; for heat sealing the bag is the distance between the port and the hemming similar heat seal line.
3.6 port length lengthofvalve
3.6.1
Heat-sealing the bag port length lengthofvalveforheatsealedsacks
The distance between the outer edge of the bag and the valve port or a valve inside sleeve edge, measured parallel to the direction from the middle of the bag bottom bags.
3.6.2
Hexagonal end port bonding the bag length lengthofvalveforpastedhexagonalbottomsacks
The distance between the outer edge of the bag and the valve port or a valve sleeve inner edge subtracting 1/2 of the bag bottom width, measured parallel to the direction from the middle of the bag bottom bags.
3.7
Lengthofvalvesleeve valve sleeve length
The outer jacket or the valve sleeve parallel to the direction of the longitudinal dimension of the bag bottom.
3.8
Heat sealing margins heatsealdistance
Heat-sealing line from a distance close to the bag bottom edge, measured perpendicular to the direction of heat-sealing lines, comprising a heat-sealing width should be measured. The effective length of the bag
aint = an.
Size Description 4
4.1 Open Mouth
4.1.1 flat edge heat-sealing the open pocket
Heat-sealing the open bag flat edge dimensions shown in Figure 1.
Description.
--- A bag length;
B --- bag width;
n --- heat sealing margins.
1 a schematic side flat heat-sealed and opened pocket
4.1.2 heat-sealing the open pocket hem
Heat-sealing the open pocket hem dimensions shown in Figure 2.
Description.
--- A bag length;
B --- bag width;
E --- hem width;
n --- heat sealing margins.
2 a schematic view pockets heat-sealing open hem
4.1.3 hexagonal bottom flat sided adhesive open pocket
Hexagonal bottom flat edge adhesive open pocket dimensions shown in Figure 3.
Description.
--- A bag length;
B --- bag width;
C --- Bag bottom width.
3 a schematic view of a hexagonal pocket bottom opening flat edge adhesive
4.1.4 rectangular bottom hem bonding the open pocket
A rectangular bottom hem bonding the open pocket dimensions shown in Figure 4.
Description.
--- A bag length;
B --- bag width;
C --- Bag bottom width.
NOTE. hem width e in Figure 2.
Figure 4 a schematic pocket size heat-sealing open rectangular bottom hem
Valve bags 4.2
4.2.1 flat edge heat-sealing valve bags
Heat-sealing valve bags flat edge dimensions shown in Figure 5.
Description.
--- A bag length;
B --- bag width;
f --- long valve port;
--- n-heat seal margin;
V --- port width.
NOTE. This type of bag may be employed type shown in Figure 6 valve ports.
FIG 5 flat edge heat-sealing valve bags schematic
4.2.2 heat-sealing valve bags hem
Heat-sealing valve pocket hem dimensions shown in Figure 6.
Description.
--- A bag length;
B --- bag width;
f --- long valve port;
I --- valve sleeve length;
--- n-heat seal margin;
V --- port width.
NOTE. hem width e in Figure 2.
FIG 6 schematic hem heat-sealing valve bags
4.2.3 hexagonal flat sided adhesive end portion of the valve pockets
Hexagonal flat sided adhesive end portion of the valve pockets dimensions shown in Figure 7.
Description.
--- A bag length;
B --- bag width;
C --- Bag bottom width;
f --- long valve port;
I --- valve sleeve length;
V --- port width.
FIG 7 hexagonal flat edge end valve pocket schematic adhesive
4.3 Common thermoplastic flexible film bag type and size code
The type and size code list of common flexible thermoplastic film bag shown in Table 1.
TABLE 1 Type and Size Code Table thermoplastic flexible film pouch
Terms of the bag type size code
4.1.1 flat edge heat-sealing the open pocket b/a
Heat-sealing the open pocket hem 4.1.2 b/e/a
4.1.3 hexagonal flat sided adhesive bottom opening pockets b/a/c
4.1.4 rectangular bottom hem bonding opened pockets b/e/a/c
4.2.1 flat edge heat-sealing valve bags b/a/v
4.2.2 hem heat-sealing valve bags b/e/a/v/f/(i)
Flat edge adhesion valve pockets b 4.2.3 hexagonal end portion/a/c/v/f/(i)
Note. 4.1 and 4.2 for the size described product bag size, unless otherwise specified, all dimensions are outside dimensions defined in this chapter.
4.4 the valve opening position
The following applies to marker valve bag and heat seal bonding the pocket valve.
The plated printed side facing up, as viewed from above, the valve opening position shown in Figure 8, may be described as the top or bottom, and left or right.
Note 1. The two ends of the valve pocket can be folded in the same direction and to be folded in opposite directions.
Note 2. Not all types are applied to each valve opening position.
Note 3. For no longitudinal lap or printed without any valve bag, valve port side end flap to the bag should be as positive. At this time, the valve was observed from the front of the bag
Port position to the left or right as described.
FIG 8 position valve port
Measurement Method 5
5.1 Tools
Long range is not less than a ruler or other measuring pockets, an indexing value of 1mm.
5.2 Test procedure
The bags placed on a horizontal plane, so that no wrinkle formation. Chapter 4 selected sample pouches point of measurement sample pouches size. Measuring at least
Twice, the arithmetic mean of the measurements taken, as a result, to the nearest 1mm.
6 Test report
The test report shall include the following.
a) describe the required information about the sample;
b) measuring the basis of criteria;
c) measurement, accurate to 1mm;
d) measured during a special case;
e) operation is not specified in this section or conditions or factors may affect the measurement results.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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