This regulation specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of polyethylene plastic hollow sheets. This standard applies to polyethylene plastic hollow sheets (hereinafter referred to as hollow sheets) that are extruded with high-density polyethylene (HDPE) resin as the main raw material. QB/T 1651-1992 Polyethylene Plastic Hollow Sheets QB/T1651-1992 Standard download decompression password: www.bzxz.net

Light Industry Industry Standard of the People's Republic of China
Polyethylene Plastic Hollow Board
Subject Content and Scope of Application
QB/T 1651—92
This regulation specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of polyethylene plastic hollow boards. This standard applies to polyethylene plastic hollow boards (hereinafter referred to as hollow boards) that are extruded and molded with high-density polyethylene (HDPE) resin as the main raw material.
2 Reference Standards
GB2828 Batch Inspection Count Sampling Procedure and Sampling Table (Applicable to Inspection of Continuous Batch) Calcium Plastic Corrugated Box
GB 6980
3 Technical Requirements
3.1 Specifications
3.1.1 Length, width, thickness and deviation shall comply with the provisions of Table 1. Table 1
Length, mm
Width, mm
Thickness, mm
3.1.2 Plate edge
Limit deviation, %
The four sides of the plate should be straight and the four corners should be right angles. The distance of the plate edge from the true right angle should not exceed 10 mm at 500 mm from the corner.
3.1.3 The number of vertical ribs and the deviation of unit area mass should comply with the provisions of Table 2. The unit area mass shall be agreed upon by the supply and demand parties. Table 2
Thickness, mm
3.2 Appearance
The appearance shall comply with the provisions of Table 3.
Board surface
3.3 Physical and mechanical properties
Number of vertical ribs, root/10cm
Products of the same color have uniform color without obvious color difference. Unit area quality deviation, %
Smooth and flat, without cracks, holes, obvious impurities and bubbles, etc., which may affect the use of defects. Approved by the Ministry of Light Industry of the People's Republic of China on January 15, 1993. 310
Implementation from September 1, 1993
Physical and mechanical properties shall comply with the provisions of Table 4 and Table 5. Thickness
Tensile strength, N
Elongation at break, %
Tear force, N
Plane compression force, N
Vertical compression force, N
4 Test method
4.1 Specification
4.1.1 Length
2. 0~~2. 7
2.0~～2.7
5.5~～6.0
≥180
≥230
≥270
≥350
≥220
QB/T1651—92
≥130
≥210
≥260
Superior product
≥1300
≥1100
≥1000
≥900
≥180
≥240
≥350bZxz.net
Measure the length of the two edges of the plate along the direction of the vertical rib with a measuring tool with an accuracy of 0.5mm. 4.1.2 Width
Use a measuring tool with an accuracy of 0.5mm to measure the width of the two edges of the plate perpendicular to the rib direction. 4.1.3 Thickness
≥120
≥170
≥210
≥255
≥130
≥150
First-class products, qualified products
Second-class products, qualified products
≥1000
≥800
≥700
≥120
≥110
≥140
Use a vernier caliper with an accuracy of 0.02mm, the jaws should be 45° to the ribs, measure five points evenly along the width of the plate, and take the average value. 4.1.4 Board edge
Measure with a measuring tool with an accuracy of 0.5mm and take the maximum value. When the board edge is less than 500mm, measure along the extended line. 4.1.5 Unit area mass
Measure a hollow board of not less than 1 square meter and calculate the unit area mass. 4.1.6 Number of ribs
Count the number of ribs within a width of 10cm from any rib as the starting point. If the last rib is on the 10cm line, it should also be counted. 4.2 Appearance
Visually inspect under natural light.
4.3 Physical and mechanical properties
4.3.1 Sample
QB/T 1651—92
Cut with a specified punch according to the direction and position shown in Figure 1. The right angle of the tearing force sample should avoid the rib position and have no scars, so that the tearing direction is consistent with the rib direction.
MWMWMWMM
Figure 1 Schematic diagram of sample cutting
1--Longitudinal tensile force and elongation at break test sample; 2--Transverse tensile force and elongation at break test sample; 3--Tear force test sample; 4--Plane compression test sample; 5--Vertical compression test sample 4.3.2 Standard environment for sample state adjustment and test The sample is adjusted at (23±2)℃ for no less than 4h, and the test is carried out under this condition. 4.3.3 Tensile force and elongation at break
The test shall be carried out in accordance with the provisions of Article 3.4.2 of GB6980.
4.3.4 Tear force
The test shall be carried out in accordance with the provisions of Article 3.4.5 of GB6980.
4.3.5 Planar compression
The test shall be carried out in accordance with the provisions of Article 3.4.3 of GB6980.
4.3.6 Vertical compression force
Perform according to Article 3.4.4 of GB6980.
5 Inspection rules
5.1 Factory inspection
Each batch of products shall be inspected before delivery, and the items of factory inspection shall be all the contents in the technical requirements. 5.2 Batch
Hollow boards shall be inspected in batches. Products with the same formula, the same batch of raw materials, and continuous production shall be a batch of less than 60,000 pieces. 5.3 Sampling
Random sampling method shall be adopted, and the specifications and appearance shall be carried out in accordance with the provisions of GB2828, see Table 6. Physical and mechanical properties inspection shall be carried out in batches, and 3 pieces shall be randomly selected from each batch for inspection. 312
Batch range
91～150
151~280
281~500
501~～1 200
1201～3200
3201~10 000
10 001~~35 000
35001~60000
5.4 Judgment rules
Sample size
5.4.1 Judgment of sample unit quality
QB/T 1651—92
Qualified judgment number A
Specifications and appearance shall be carried out in accordance with the requirements of 3.1 and 3.2. If all items are qualified, the sample unit is qualified. 5.4.2 Determination of delivery batch quality
Number of unqualified determination R
Specifications and appearance shall be carried out in accordance with GB2828. The normal inspection sampling plan is adopted, the general inspection level is I, and the qualified quality level (AQL) is 6.5, see Table 6. In the physical and mechanical properties test results, if there are unqualified items, double samples should be drawn from the original batch, and the unqualified items should be re-tested. If all the re-test results are qualified, the batch of products is qualified. 5.4.3 Determination of product quality grade
Determine according to the lowest grade of all test results. 6 Marking, packaging, transportation, storage
6.1 Marking
The product packaging should be accompanied by a certificate of conformity, including: product name, specification, color, quality grade, production date, and inspector's seal. The product outer packaging should indicate: product name, specification, color, quality grade, quantity, manufacturer name, factory address, production date, and trademark. 6.2 Packaging
The product is packed in cardboard (box) or plastic board (box), with 50 or 100 pieces as a package, and tied. It can also be packed according to user requirements.
6.3 Transportation
During transportation, the product should be loaded and handled with care, and heavy pressure is strictly prohibited and avoid sunlight. 6.4 Storage
The product should be stored in a cool and ventilated warehouse, stacked neatly, away from heat sources, with a stacking height not exceeding 2m, and the storage period shall not exceed one year from the date of production.
Additional instructions:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Plastic Products Standardization Center. This standard was drafted by Tangyuan Plastic Factory of Heilongjiang Province and Zibo Plastic Factory No. 8 of Shandong Province. The main drafters of this standard are Wu Lianshuang, Yuan Jingfei and Chen Bin. 313
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