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QB/T 2463 consists of the following parts under the general title of Unplasticized polyvinyl chloride foam boards:
——Part 1: Free foam extrusion process
——Part 2: Celuka extrusion process
——Part 3: Co-extrusion process
This is Part 2 of QB/T 2463.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces QB/T 2463.2-1999 Unplasticized polyvinyl chloride foam boards—Celuka method. In addition to editorial changes, the following main technical changes have been made with respect to QB/T 2463.2-1999:
——The name of the standard is changed from “Celuka method” to “Celuka extrusion process” (see the title);
——"Classification” is added (see Clause 3 hereof);
——The nominal dimension and deviation are added, and the thickness and its deviation are modified (see 4.2 hereof; 3.4 of 1999 edition);
——The thickness and warpage are modified (see 4.3 hereof; 3.5 of 1999 edition);
——The diagonal deviation is modified (see 4.4 hereof; 3.3 of 1999 edition);
——The index of water absorption is modified (see 4.5 hereof; 3.5 of 1999 edition);
——The limit of harmful substances is added (see 4.7 hereof);
——The tensile strength and tensile strain are modified (see 5.4.4 hereof; 4.6.4 of 1999 edition);
——The test temperature of dimensional change after heating is modified (see 5.4.7 hereof; 4.6.7 of 1999 edition).
This part was proposed by China National Light Industry Council.
This part is under the jurisdiction of the National Technical Committee on Plastic Products of Standardization Administration of China (SAC/TC 48).
The previous edition of this part is as follows:
——QB/T 2463.2-1999.
Unplasticized polyvinyl chloride foam boards
—Part 2: Celuka extrusion process
1 Scope
This part specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of polyvinyl chloride foam boards using Celuka extrusion process.
This part is applicable to unplasticized polyvinyl chloride foam boards (hereinafter referred to as "boards") which are made with PVC resin as the main raw material, added with various auxiliaries, mixed and extruded by Celuka extrusion process.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1034-2008 Plastics—Determination of water absorption
GB/T 1040.2-2006 Plastics—Determination of tensile properties—Part 2: Test conditions for moulding and extrusion plastics
GB/T 1043.1-2008 Plastics—Determination of charpy impact properties—Part 1: Non-instrumented impact test
GB/T 1633-2000 Plastics—Thermoplastic materials—Determination of Vicat softening temperature (VST)
GB/T 2411-2008 Plastics and ebonite—Determination of indentation hardness by means of a duronmeter (shore hardness)
GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2918-1998 Plastics—Standard atmospheres for conditioning and testing
GB/T 6343-2009 Cellular plastics and rubbers—Determination of apparent density
GB 8624 Classification for burning behavior of building materials and products
GB/T 8811-2008 Rigid cellular plastics—Test method for dimensional stability
GB/T 9341-2008 Plastics—Determination of flexural properties
GB/T 17657-2013 Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels
GB/T 19367-2009 Wood-based panels—Determination of dimensions of panels
GB 28481 Limit of harmful substances of plastic furniture
3 Classification
Products are classified by apparent density, as shown in Table 1.
Table 1 Classification
Dimensions in g/cm3
Category Apparent density ρ
A 0.40<ρ≤0.50
B 0.50<ρ≤0.65
C ρ>0.65
4 Requirements
4.1 Appearance
The surface of the board shall be smooth and free from defects affecting the use, such as bumps, scratch, deformation, crack, stripe, impurity, etc. The color and luster of the same batch of boards and the cross-section foaming shall be uniform.
4.2 Dimensions and deviations
Dimensions and deviations shall meet those specified in Table 2.
Table 2 Dimensions and deviations
Dimensions in millimeters
Item Nominal dimension Deviation
Length 2 440 0~+8
Width 1 220 0~+3
Thickness δ 3≤δ≤8 ±0.2
8≤δ≤18 ±0.3
18≤δ≤20 ±0.4
δ>20 ±0.5
4.3 Warpage
Warpage shall meet those specified in Table 3.
Table 3 Warpage
Nominal thickness /mm Warpage /(mm/m)
3<δ≤8 ≤5
8<δ≤18 ≤4
18<δ≤20 ≤3
δ>20 ≤3
4.4 Diagonal deviation
Diagonal deviation of standard dimension boards shall not be greater than 5 mm.
Note 1: The dimensions of standard board are 1 220 mm in width and 2 440 mm in length.
Note 2: Diagonal deviation of special dimensions shall be determined by the seller and the buyer.
4.5 Physical and mechanical properties
The physical and mechanical properties shall meet those specified in Table 4.
Table 4 Physical and mechanical properties
No. Item Requirements
A B C
1 Apparent density /(g/cm3) 0.40<ρ≤0.5 0.50<ρ≤0.65 ρ>0.65
2 Shore hardness (D) ≥ 50 55 60
3 Vicat softening point/°C ≥ 60 70 70
4 Dimensional change after heating/ % ±2 ±2 ±2
5 Water absorption /(%) ≤ 4 2 1
6 Screw holding capacity /N ≥ 600 800 1 000
7 Tensile strength /MPa Longitudinal ≥ 5 6 10
Transverse ≥ 4 5 6
8 Tensile strain /(%) Longitudinal ≥ 6 8 10
Transverse ≥ 5 6 8
9 Charpy impact strength /(kJ/m2) Longitudinal ≥ 10 12 20
Transverse ≥ 7 9 16
10 Bending strength/ MPa Longitudinal ≥ 14 18 22
Transverse ≥ 8 12 16
11 Bending modulus of elasticity /MPa Longitudinal ≥ 600 800 1 000
Transverse ≥ 600 800 1 000
Note: The hardness of Category A boards less than 10 mm thick and Categories B and C boards less than 3 mm thick is not assessed.
4.6 Combustion properties
When used as building decoration materials, it shall meet the requirements of B1 level in GB 8624.
4.7 Limit of harmful substances
When used as interior decoration and furniture materials, it shall meet the limit specified in GB 28481.
5 Test methods
5.1 Conditioning and test environment
The test shall be carried out in accordance with the requirements of GB/T 2918-1998. The sample is conditioned at (23 ± 2) °C for 24 h.
Foreword i
1 Scope
2 Normative references
3 Classification
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation and storage
