This standard specifies the product classification, requirements, test methods, inspection rules and marking, packaging, transportation and storage of polyethylene sheets formed by extrusion. This standard applies to sheets formed by extrusion of polyethylene resin (hereinafter referred to as "sheets"). QB/T 2490-2000 Polyethylene (PE) extruded sheets QB/T2490-2000 Standard download decompression password: www.bzxz.net

Classification number G33
Registration number: 7573-2000
Light Industry Standard of the People's Republic of China
QB/T2490—2000
Polyethylene (PE) extruded sheet
2000-09-08 Release
State Bureau of Light Industry
2001-02-01 Implementation
YB/T 2490—2000
The standard BG33007-19894 Polyethylene 2 extruded sheet (the standard was issued by the Ministry of Light Industry in 1990) No. 112 document and converted to QA36301999, the internal handling is the same as the previous standard. This standard is not equivalent to the German industry standard DIN16925-1987 ITDPF extrusion supply technical standard 3. This standard is issued by the State Administration of Light Industry. This standard is under the jurisdiction of the National Material Standardization Center. This standard was drafted by the Beijing Material Research Institute. The main personnel of this standard are: the general manager, the implementation date of the standard is: the State Light Industry Bureau issued the industry standard QB/T363019&Quan Ethylene Jishan Scope
The People's Republic of China Light Industry Industry Standard
Polyethylene (PE) extruded sheet
0/T 2490-2000
Replaces QBT3630-1
This standard specifies extruded! The product classification, requirements, test methods, inspection rules and marking, packaging, transportation, storage, and maintenance of ethylene extruded sheets (hereinafter referred to as "sheets"). 2 Reference standards The following standards contain provisions that constitute referenced provisions in this standard. The versions shown are valid at the time of publication of this standard. The standard department will revise it according to the circumstances. The name of this standard should be checked after use. The latest version of the following standards is used for verification.
G1033-196 Test method for density and volume density of materials (Japanese/1040-1992 Test method for tensile properties of materials (Japanese/1043-1993 Test method for simple supported nesting of rigid plastics ... Product classification method
Food packaging whole edge polyurethane leather product 1 Product classification GE9687-1988
3 Product classification
Material density is divided into categories
Low room temperature board agent: 0.919g/cm*--0.925g/cm3 Commercial case extreme wealth: 0.94g/cml--0.950g/cm34 Requirements
4.1 Specifications
Board weak flammability and extreme service See Table 1 for the difference.
Original degree (%)
Maximum position of the pair and velvet
Note: 1. For coiled or unmeasured materials, the pair is the line retreat difference. 2. The heat price of privately-made board materials can be agreed upon by both parties. State Bureau of Light Industry 2000--09-08 Drawing Standard
Each 16 sides K
Limited difference
+20.180.03s3
2001-02-01Implementation
4. 2 Appearance
08/T 24902000
The board should be smooth and flat, without bubbles, cracks, impurities, dents and color marks. 4.3
Physical mechanical properties
The physical mechanical properties of the material should comply with the requirements of Table 2 and Table 3. Table 2
Tensile strength (collar, horizontal!
Simply supported impact (, horizontal
Collar size
0.919~-0.925
No crack
0.940~-0.560Www.bzxZ.net
Note: From the following point, the size change F. Year bracket quantity linear relationship, 3,5.7mm reported material size change The rate of the standard is the same as that of the existing indicators.
4.4 Requirements
All tableware, packaging containers and food industry utensils produced annually with polyethylene sheet materials shall comply with the provisions of CB968?.
5 Test method
5:! When welding the rolled sheet, the surface layer should be removed first, and the sample test bar and the reported material should be not less than 50%, 5.2 Test conditions and test standards The sample should be placed in an environment with a temperature of (232) for more than 16 hours, and the test should be carried out under this condition: 5.3 Appearance inspection
The 1m cast material should be tested daily under normal natural light. 5.4 Determination of the source
The measurement is 4.02mm and the measurement point is evenly nailed on the width of the plate: the visual point of the rub should be 20mm:
5.5 Determination of the actual stop and length
Use steel coil to measure, precision to the market,
5.6 Determination of the difference between the two medial lines on the 1000mm length of the plate, with an accuracy of 1amm: 5.7 Determination of non-degree
shall be determined in accordance with GB/T1033:19R6 Section 1.1.3.2, 5.8 Determination of the need for fast drawing
shall be determined in accordance with GR/Tt040. Take the layer type sample, the test speed is 50mu/min5.9 Health inspection
According to 6BT5009.60 method,
5.10 Tube support impact strength radiation test
QB/T 24902000
Measured in accordance with GBT1043. Type A quick-cut specimens are used, and the impact energy of the hammer is 4J5.11 Determination of the dimensional change rate
Take three specimens of 10mm×100mm evenly in the width direction of the core material, draw a line at the center of the specimen (see figure) and place them in an inlet box with an effective ventilation device, and test them at a temperature of (70±2) for 1h. In order to prevent the length change from being affected, a layer of 3mm thick protective film is required to prevent powder or tide. After the test, take out the specimen, wait for it to cool to room temperature, and then read the specimen with a ruler. If the specimen cannot be measured due to the loading, put the specimen in the oven when the temperature is 100℃. The dimensional change in the horizontal direction is determined by【 1) T(%)
formula.
In the formula:
one crack dimension change rate, mm;
. Sample size before heating, mm;
sample size after heating, mm
The test results are expressed as the arithmetic mean of the three sample results, accurate to 1%: 50
Figure! Eight-inch exchange
6 Inspection rules
Case B Refined plate is made of raw materials, time formula, market specifications, and products produced by the same process as a batch. The quantity of each batch is not allowed to exceed 20. The batch number of the extremely large materials shall be marked when they are delivered: a batch of products can be delivered as a batch. 6.2 Factory inspection
QB/T2490-2D00
, an inspection process includes 4 .1, 4.2, 4.3, Table 2, and other items may also be determined by agreement between the supply and demand parties. 6.3 Type inspection Type inspection includes all technical requirements in Chapter 4 of this standard. At least once a year, a type inspection shall be carried out. a) New products or old products are transferred to the factory for trial production and type identification; d) When the main factory inspection results are significantly different from the last type inspection results; d) When the quality supervision agency proposes a type inspection requirement. 6.4 Unique samples 6.4.1, specifications, according to G/T282, use normal materials. The sample set is generally based on the following level: the quality level AU is 6.5, according to Table 4, the unit is block. 6.4.2 Physical performance test, only the sample is collected in the Hanyi plate material reverse test, 4
select the small piece
26--150
151-~2811
281~-500
50J-~:200
121-~20%
320110000
100ul--35000
>35000
combined judgment number
uncombined judgment number R
55 rule
4.! ,4.2 According to the provisions of Table 4, if there is a need to meet the requirements, the sample can be added to the batch for re-inspection. If the current load is not in compliance, it shall be determined as unqualified: 7 Marking, packaging, storage
Each package shall have a product certificate, which includes: a) product name and manufacturer name; b) product specifications;
; production date, batch number and net five:
; product trademark and inspector code; e) use of standard.
7.2 Packaging
Sheet materials are packaged in hemp, box or other materials. The mass of each box shall not exceed 10kg. After the sheet is rolled, the ends shall be tied with ropes and then wrapped with plastic. The mass of each box shall not exceed 50kg. QB/T 2490-2000
The product should be free from noise, heavy pressure, strong picking and rain during transportation, and the packaging should be kept smooth and intact. 7.4
The product should be stored in a warm and clean room or simple storage room. The product should be stored in a heat source for no less than 12 hours and should not exceed two years from the date of production.
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