This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of biaxially oriented polystyrene (BOPS) sheets. This standard applies to sheets made of polystyrene resin as the main raw material, extruded by the flat film method and biaxially oriented. GB/T 16719-1996 Biaxially oriented polystyrene (BOPS) sheets GB/T16719-1996 Standard download decompression password: www.bzxz.net
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of biaxially oriented polystyrene (BOPS) sheets. This standard applies to sheets made of polystyrene resin as the main raw material, extruded by the flat film method and biaxially oriented.

GB/T16719--1996
In order to meet the needs of the development of biaxially oriented polystyrene (BOPS) sheet production in my country, this standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of the product, thereby providing a national unified technical basis for the production of biaxially oriented polystyrene (BOPS) sheets.
The sanitary indicators of this standard comply with the provisions of GB9689--88 "Sanitary Standards for Polystyrene Moldings for Food Packaging". The main technical parameters and indicators of this standard are determined based on the results of testing samples of similar products of various specifications at home and abroad, and with reference to the indicators of similar products of Japanese Mitsubishi Chemical, American Kama Company, Taiwan Nanbao and other companies and the American ASTMD1463-81 product standard.
Appendix A of this standard is a prompt appendix. This standard is proposed by China Packaging Corporation. This standard is under the jurisdiction of the National Packaging Standardization Technical Committee. The main responsible drafting unit of this standard is Ningbo Lexing Packaging Material Co., Ltd., and the co-drafting units of this standard are Changzhou Guangming Plastic Co., Ltd., Jiaxing Plastic Packaging Material General Factory, and Shanghai Plastic Products Factory No. 3. The main drafters of this standard are Zhang Yimin, Wang Guomei, Ye Yawei, Chen Jianrong, Hu Zhu, and Tang Jianhua. 289
1 Scope
National Standard of the People's Republic of China
Biaxially oriented polystyrene (BOPS) sheet
GB/T 16719--1996
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of biaxially oriented polystyrene (BOPS) sheet (hereinafter referred to as sheet). This standard is applicable to sheets made of polystyrene resin as the main raw material and extruded by flat film method and biaxially stretched. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB2410-80 Test method for light transmittance and haze of transparent plastics GB 2828—87
Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) GB 2918--82
Standard environment for conditioning and testing of plastic specimens GB5009.60—1996
Analytical method for hygienic standards of polyethylene, polystyrene and polypropylene molded products for food packaging GB 6672—86
Determination of thickness of films and sheets by mechanical measurement Plastics
Determination of length and width of plastic films and sheets GB 6673—86
GB 9689-—88
Sanitary standard for polystyrene molded products for food packaging GB13022—91
Test method for tensile properties of plastic film
GB/T14216-93 Test method for wetting tension of plastic film 3 Product classification
3.1 Product classification is carried out according to the width and thickness specifications of the sheet. The sheet thickness series is shown in Appendix A. 3.2 Product specifications:
Width: 300~3300mm;
Thickness: 0.0250.600mm.
3.3 Special specifications are agreed upon by both the supplier and the buyer.
4 Technical requirements
4.1 Size limit deviation
4.1.1 Width deviation +4mm.
4.1.2 Thickness deviation is shown in Table 1.
Approved by the State Technical Supervision Bureau on October 3, 1996 290
Implemented from May 1, 1997
Nominal thickness
0.101~~0.250
0.251~0.400
0.401~0.600
4.2 See Table 2 for appearance quality.
Cracks, wrinkles, scars, ribs,
bubbles, perforations, stripes
single points\)
pieces/m2
0. 5~1.0 mm
Distribution status
Appearance of reel
Number of joints per reel
End of reel tube core
GB/T16719--1996
Poor, %
Superior product
Superior product
Not allowed
Smooth surface
Not allowed
First-class product
First-class product
Not allowed
Dispersed distribution
Surface smooth
Qualified products
Qualified products
Slight ribs and scars and stripes that do not affect the use are allowed, other items are not allowed
Speckles are allowed
One is allowed, and the length of each section is not less than 50mbzxZ.net
Basically flat
No defects that affect the use are allowed
1) Abnormal points refer to black spots, white spots, impurities, dead blocks, and crystal points that can be observed by the naked eye on the sheet. 4.3 Physical and mechanical properties are shown in Table 3.
Tensile strength
Elongation at break
Transmittance)
Haze?
Wetting tension? )
1) Limited to transparent sheets.
2) Limited to sheets that have been treated with electroplating but not coated. Table 3
GB/T16719—1996
4.4 The hygienic properties of the sheets used for food packaging shall comply with the provisions of GB9689. 5 Test methods
5.1 Sampling
5.1.1 After removing two layers from the sample roll, cut two 2m long sheets, one for dimensional limit deviation and appearance test, the other for physical mechanical properties and hygienic properties test, and correctly mark the corona treatment surface and coating surface. During the sampling process, the sample must not be contaminated or damaged, otherwise re-sample.
5.1.2 See Figure 1 for cutting samples.
1-Transmittance and haze samples; 2-Tensile strength and elongation at break samples, 3-Wetting tension samples Figure 1
5.2 Test conditions
5.2.1 Test environment
Perform the test in the normal deviation range of the GB2918 standard environment. 5.2.2 Sample state adjustment
The sample is placed in the standard test environment for no less than 4h. 5.3 Specifications and dimensions
5.3.1 The thickness of the sheet shall be measured in accordance with GB6672, and the thickness deviation shall be calculated using the maximum deviation value. 5.3.2 The width of the sheet shall be measured in accordance with GB6673. 5.4 Appearance
Visual inspection under natural light.
5.5 Tensile strength and elongation at break
GB/T16719-1996
The tensile strength and elongation at break of the sheet shall be measured in accordance with GB13022, the sample shall be type 1 or V, and the test speed shall be 50mm/min±5 mm/min.
5.6 Light transmittance and haze
The light transmittance and haze of the sheet shall be measured in accordance with GB2410. 5.7 Wetting tension
The determination of the wetting tension of the sheet shall be carried out in accordance with GB/T14216. 5.8 Hygienic properties
The determination of the hygienic properties of the sheet shall be carried out in accordance with GB5009.60. 6 Inspection rules
6.1 The same specification of sheets produced under the same brand of resin and the same process conditions shall be considered as a batch. Each batch shall not exceed 50 t. 6.2 Factory inspection
6.2.1 The factory inspection items are all items in the technical requirements except for the hygienic properties. 6.2.2 The dimensional deviation and appearance of the sheet shall be sampled according to the requirements of GB2828 normal inspection secondary sampling plan detection level I and AQL6.5 (see Table 4), and shall be inspected according to the provisions of 4.1 and 4.2. Table 4
16～25
51～90
91～150
151～280
281～500
501～1 200
1 201～3 200
Sample size
Cumulative sample size
Number of qualified judgments
6.2.3 The physical and mechanical properties of the sheet shall be inspected in accordance with the requirements of 4.3 at least on the first batch of products. 6.3 Type inspection
6.3.1 Type inspection should be carried out in any of the following situations: a) Trial design and evaluation of new products or old products for transfer to factory production; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; During normal production, inspections should be carried out every six months; When the product is resumed after a long period of suspension; d)
Number of unqualified judgments
GB/T16719—1996
e) When there is a significant difference between the factory inspection results and the last type inspection; f) When the national quality supervision agency proposes a requirement for type inspection. 6.3.2 Type inspection items are all items in the technical requirements. 6.4 Judgment rules
6.4.1 If any one of the dimensional deviation and appearance of the sheet material is unqualified, the roll is unqualified, and the qualified batch is determined according to Table 4. 6.4.2 If any one of the physical and mechanical properties of the sheet material is unqualified, double sampling and re-inspection of the unqualified items shall be carried out (unqualified samples shall be eliminated). If the re-inspection results are still unqualified, the entire batch shall be unqualified. 6.4.3 If the hygiene index is unqualified, the batch shall be unqualified. 7 Marking, packaging, transportation, storage
7.1 Marking
The sheet roll or packaging box shall have a certificate of conformity and a registered trademark, indicating the production unit, product name, specification, weight, corona treatment surface, coating surface, batch number, production date, grade, packaging box dimensions (length × width × height) and moisture-proof, heat-proof, impact-proof and other marks. 7.2 Packaging
7.2.1 Each roll of sheet material shall be packed with plastic film as inner packaging, corrugated paper box as outer packaging, and tied with packing tape. 7.2.2 Special packaging shall be agreed upon by both parties. 7.3 Transportation
Handle with care and prevent collision, sun exposure, rain and pollution. 7.4 Storage
7.4.1 Sheets shall be stored in a clean and dry warehouse, away from heat sources, not exposed to direct sunlight, and not stored together with toxic substances. 7.4.2 The shelf life of sheets shall not exceed one year. 294
GB/T 16719-1996
Appendix A
(Suggestive Appendix)
Sheet thickness series
Unit: μm
30, 60, 80, 100, 120, 150, 180, 210, 250, 300, 350, 400, 450, 500, 550, 600. 295
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