This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of rigid polyvinyl chloride foam plastic sheets. This standard applies to closed-cell rigid polyvinyl chloride foam plastic sheets (hereinafter referred to as PVC foam sheets) formed by molding and foaming polyvinyl chloride resin with foaming agent, solvent, stabilizer, etc. QB/T 1650-1992 Rigid polyvinyl chloride foam plastic sheets QB/T1650-1992 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
Rigid polyvinyl fluoride foam plastic sheet
Subject content and applicable scope
QB/T 1650 --92
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of rigid polyvinyl chloride foam plastic sheet.
This standard applies to closed-cell rigid polyvinyl chloride foam plastic sheet (hereinafter referred to as PVC foam sheet) formed by molding and foaming polyvinyl chloride resin with foaming agent, solvent, stabilizer, etc. 2 Reference standards
GB 2406
Test method for combustion performance of plastics Oxygen index method Standard environment for conditioning and testing of plastic specimens GB 2918
GB3399
Test method for thermal conductivity of plastics Heat-protected plate method GB6343
Determination of apparent density of foam plastics and rubber GB 8811
Test method for dimensional stability of rigid foam plastics GB8813 Compression test method for rigid foam plastics GB 9641
3 Product classification
Test method for tensile properties of rigid foam plastics 3.1 PVC foam sheets are divided into two categories according to their apparent density. Category 1: 35~45kg/m3
Category I: greater than 45kg/m3
3.2 PVC foam sheets are divided into two types according to their combustion performance: ordinary type (PT) and flame retardant type (ZR). 4 Technical requirements
4.1 Specifications (length, width, thickness) shall comply with the dimensions agreed upon by both parties. 4.2 Appearance
The appearance of PVC foam sheets shall comply with the requirements of Table 1. Table 1
Color uniform
Basically flat, no obvious material shortage and shrinkage deformation shall not exceed 15 mm
Basically uniform
No obvious oil stains and stains
Approved by the Ministry of Light Industry of the People's Republic of China on January 15, 1993
Implementation on September 1, 1993
QB/T 1650—92
4.3The physical and mechanical properties of PVC foam sheets shall comply with the requirements of Table 2. Table 2
Apparent density, kg/m2
Compressive strength (compressive stress at 10% relative deformation), MPaTensile strength, MPa
Dimensional change rate (70°C, 48h), %Water absorption, kg/m2
Thermal conductivity, W/(m·K)
Oxygen index\, %
Cold resistance
Heat resistance
Oil resistance
Note: 1) This item is not tested for PT products.
5 Test method
5.1 Specifications and dimensions
Measured with a measuring tool with an accuracy of 1mm.
35℃, 30min no crack
80℃, 2h no stickiness
No change after soaking in zero diesel for 24hwwW.bzxz.Net
5.2 Appearance
5.2.1 Warping Use a reference ruler larger than the diagonal of the PVC foam sheet, place it sideways on the most concave part, and then use a ruler with an accuracy of 1mm to measure the maximum distance between the warping surface and the reference ruler. 5.2.2 Other items are visually inspected under natural light. 5.3 Physical and mechanical properties
5.3.1 The sample is prepared by mechanical cutting without skin. 5.3.2 The state adjustment and standard environment of the sample are in accordance with GB2918. The state adjustment is carried out for 24h in an environment with a temperature of (23±2)℃ and a relative humidity of 45%~~55%, and the test is carried out.
5.3.3 Apparent density
Carry out in accordance with GB6343. Sample size 100mm×100mm×25mm, 3 samples. 5.3.4 Compression strength
According to GB8813. Sample size 50mm×50mm×25mm, 5 samples, test speed 5mm/min. 5.3.5 Tensile strength
According to GB9641. 5 samples, test speed 5mm/min. 5.3.6 Dimensional change rate
According to GB8811. Temperature 70C, time 48h, 3 samples. 5.3.7 Water absorption
5.3.7.1 Instrument
Analytical balance
Vernier caliper
Glass container.
Precision 0.0001g;
Precision 0.02mm;
QB/T1650-92
5.3.7.2 Sample size 30mm×30mm×30mm, sample quantity 3. 5.3.7.3 Test steps
Immerse the weighed sample in distilled water, so that the distance between its surface and the water surface is not less than 50 mm. There shall be no bubbles on the sample surface. The samples shall not contact each other or the sample shall not contact the wall of the container. After 24 hours, take out the sample, dry the surface with filter paper, and weigh it immediately. The whole process shall be completed within 2 minutes.
5.3.7.4 The test result shall be calculated according to formula (1). Where: W is the water absorption per unit area, kg/m2; W is the weight of the sample before immersion in water, g;
W2 is the weight of the sample after immersion in water, g;
S is the surface area of ​​the sample, cm2.
Test results are the average of three samples. 5.3.8 Thermal conductivity
According to GB3399. Sample aging is not less than 28 days. 5.3.9 Oxygen index
According to GB2406. Sample aging is not less than 28 days. Sample size is 150mm×12.5mm×12.5mm. 5.3.10 Oil resistance
5.3.10.1 Sample size is 30mm×30mm×30mm, and the number of samples is 3. 5.3.10.2 Test medium is zero diesel.
5.3.10.3 Test steps,
Immerse the sample 100mm below the diesel liquid surface. There should be no bubbles on the surface of the sample. Take it out after 24 hours, absorb the surface diesel with filter paper and then visually inspect.
5.4.11 Heat resistance
5.4.11.1 Apparatus
Thermostatic box.
Out inspection.
120mm×15mm×10mm, 3 samples. Sample size,
Put the sample flat on the metal net of the thermostatic box at (80±2)°C, with a spacing of not less than 25mm, and take it out immediately after 2h. Test steps
Cold resistance
5. 4. 12. 1
5.4.12. 3
Visual inspection.
Low temperature box or other low temperature device that can control the temperature at (-35±2)°C. Sample size
Test steps
6 Inspection rules
6.1 Batch
120mmX10mm×10mm, 3 samples. Place the sample in the instrument at (-35 ± 2) C for 30 minutes, then take it out and immediately bend the sample into an angle of 150°. Products with the same formula and specifications, with a volume not exceeding 150m3, are considered a batch. 6.2 Factory inspection
Inspection items Specifications and dimensions, appearance, apparent density, water absorption, compression strength, tensile strength, oxygen index. 6.3 Type inspection
6.3.1 The inspection items are all items in the technical requirements. 6.3.2 Type inspection should be carried out in any of the following situations: a. Trial design and identification of new products or old products transferred to the factory for production; b. After formal production, if there are major changes in structure, materials, and processes that may affect product performance; 479
c. During normal production, inspection is carried out once a year; d. When the product is discontinued for more than half a year and production is resumed. 6.4 Judgment rules
QB/T1650--92
6.4.1 Specifications, dimensions, and appearance Take 20 samples at random for inspection. If more than two of them are unqualified, double the samples shall be taken for retesting. If there are still more than two unqualified samples in a group, the batch shall be judged as unqualified. 6.4.2 Physical and mechanical properties Take one sample at random from the samples in 6.4.1 for testing. If there are unqualified items, double the samples shall be taken for retesting the unqualified items. If they are still unqualified, the batch shall be judged as unqualified. 7 Marking, packaging, transportation, and storage
7.1 Marking
7.1.1 Each package shall be accompanied by a certificate of conformity. The certificate of conformity shall indicate: product name, trademark, category, specification, quantity, production date, production unit, standard code, and inspector's seal.
7.1.2 ZR products shall be clearly marked.
7.2 Packaging
PVC foam sheets should be bundled with packing tape according to their categories and specifications. 7.3 Transportation
No fireworks during transportation to avoid mechanical damage. 7.4 Storage
Should be placed in a dry and ventilated place, away from fire and chemicals that can cause swelling and dissolution. Additional remarks:
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 Promotion Center. This standard was drafted by Tianjin Foam Plastic Products Factory. The main drafters of this standard are Fan Yiguang, Ji Rongqin and Zhang Yongge. From the date of implementation of this standard, the original Light Industry Ministry standard SG212-80 "Rigid polyvinyl chloride foam plastic sheet" will be invalid. 480
TKAKAca
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.