QB/T 2463.3-1999 Co-extrusion method for rigid polyvinyl chloride low foaming sheet
Some standard content:
QB/T2463.3--1999
Co-extrusion rigid polyvinyl chloride low foaming sheet has the characteristics of light weight, flame retardant, corrosion resistance, moisture resistance, heat preservation and shock absorption, long life, high strength, good resistance to environmental stress, etc. It can be thermoformed and nailed, drilled, chiseled, riveted, and glued. It is widely used in decoration, commercial advertising, construction, automobiles, ships, furniture, transportation and other industries. It has far-reaching significance for promoting the use of plastics instead of wood, plastics instead of gold, environmental protection, fire safety, and energy conservation. This standard is the third of a series of standards for the rigid polyvinyl chloride (PVC-U) low foaming sheet industry. This standard is proposed by the National Technical Committee for Standardization of Plastic Products. This standard is under the jurisdiction of the Plastic Processing and Application Research Institute of the China Light Industry Association. This standard was jointly drafted by Suzhou Tianling Plastic Wood Co., Ltd., Heilongjiang Jixi Plastic Factory, and Beijing Hualin New Materials Co., Ltd. The main drafters of this standard are: Cao Jing, Jin Yin, Wang Youjun, and Hu Ping. 721
1 Scope
Light Industry Standard of the People's Republic of China
Rigid polyvinyl chloride low foaming board
Coextrusion method
QB/T2463.3—1999
This standard specifies the product classification, requirements, test methods, inspection rules and marking, packaging, transportation and storage of rigid polyvinyl chloride (PVC-U) low foaming board by coextrusion method.
This standard is applicable to rigid polyvinyl chloride low foaming board (hereinafter referred to as "board") made by coextrusion process with polyvinyl chloride resin as the main raw material, various additives and mixed. 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 version of the following standards. GB/T1034-1998Test method for water absorption of plasticsGB/T 1040--1992
GB/T 1043--1993
GB/T 1633--1989
GB/T 2411--1989
GB/T 2828—1987
Test method for tensile strength of plastics
Test method for impact of simply supported beams on rigid plastics
Test method for softening point (Vicat) of thermoplasticsTest method for Shore hardness of plastics
Batch-by-batch inspectionCount sampling procedure and sampling table (applicable to inspection of continuous batches)GB/T2918--1998Standard environment for conditioning of plastic specimens and specimensDetermination of apparent (bulk) density of cellular plastics and rubberGB/T 6343--1995
GB8624--1997 Method for grading the burning performance of building materialsGR/T 8811--1988
Test method for dimensional stability of rigid foam plasticsGB/T 9341--1988 Test method for bending performance of plasticsGB/T11718.9-1989 Determination of screw holding force of medium density fiberboard3 Terms
Grooves with a certain depth or protrusion along the extrusion direction of the product surface. 3.2 Traces of dirt
Traces on the surface of the product caused by dirt. 3.3 Scratches
Scratches on the product after molding.
3.4 Standard sheets
Standard sheets are 2440mm in length and 1220mm in width. Approved by the State Bureau of Light Industry on October 14, 1999
Implemented on March 1, 2000
Product Classification
QB/T2463.3—1999
Sheets are divided into three categories according to thickness: Type A, Type B and Type C, see Table 1. Table 1
Product Classification
5 Requirements
5.1 Appearance
The appearance of the sheet should comply with the requirements of Table 2.
Project name
Black spots and impuritiesWww.bzxZ.net
Waves and stripes
Traces of dirt
Superior products
Surface uniform
No black
spots and impurities larger than 2 mm are allowed. Black spots and
impurities smaller than 2 mm shall not exceed 2 per square meter, and
no more than 5 per side
No obvious ripples and stripes are allowed
Slight
concave and convex below 5 mm×5 mm shall not exceed 2 per square meter, and
no more than 5 per side
First-class products
The front of the board is uniform
Thickness:
No more than 2 mm is allowed Black
spots and impurities, black spots and
impurities smaller than 2mm shall not exceed 4 per square meter, and shall not exceed 10 per
side||
|ripples and stripes are allowed, but no hand
feel, and the ripple area shall not exceed 20%
slight
concave and convex below 5 mmX5 mm shall not exceed 4 per square meter, and shall not exceed 10 per side
slight scratches with hand feel are allowed, but shall not form a network.
The warping of the board shall comply with the provisions of Table 3.
A, B type
5.3 Foaming quality
Superior product
First-class product
Even foaming, fine and dense pores, individual perforation is allowed, but side gaps are not allowed. 5.4 Specifications The length, width and limit deviation of the plate shall comply with the provisions of Table 4. Table 4 Nominal length 2440 Nominal width Qualified products No black spots or impurities larger than 2 mm are allowed. The number of black spots and impurities smaller than 2 mm shall not exceed 5 per square meter and 15 per surface. Corrugations are allowed, but shall not exceed the thickness tolerance and the corrugation area shall not exceed 30% 5 mm × 5 mm The following slight
concave and convex shall not exceed 5 per square meter,
each side shall not exceed 15
Qualified products
Limit deviation
Negative deviation is not allowed
Negative deviation is not allowed
QB/T2463.3—1999
The thickness and deviation of the plate shall comply with the provisions of Table 5. 5.4.2
Note: The size of the plate shall be determined by negotiation between the supply and demand parties. 5.5 Diagonal difference
The diagonal difference of the plate is less than 6mm.
5.6 Physical and mechanical properties
The physical and mechanical properties of the plate shall comply with the provisions of Table 6. Item
Apparent density
Shore hardness (D)
Tensile strength
Elongation at break
Simply supported beam impact strength
Vicat softening point
Dimensional change upon heating
Water absorption
Flexural strength
Screw holding force
Note: Screw holding force is only tested when required by the customer. 5.7
Combustion performance
≤1000
≥15 or no break
≥12 or no break
In addition to meeting the indicators in Table 5, the board used as interior decoration material must also meet the requirements of GB8624 for flame retardant B1 grade materials. 6 Test method
6.1 Sample state and test environment
Perform in accordance with GB/T2918. Temperature (23 ± 2) ℃, adjustment time is not less than 24h. 6.26.5 Test according to this clause only in arbitration.
6.2 Appearance and foaming quality
6.2.1 Color, ripples, stripes, scratches
Visual inspection at a distance of 600mm from the board under natural light. 6.2.2 Foaming quality
Inspect with a 30x magnifying glass under natural light. 727
6.2.3 Black spots, impurities, traces of dirt
QB/T 2463.3—1999
Visual inspection at a distance of 600mm from the board under natural light, and measure with a measuring tool with an accuracy of 0.02mm. 6.2.4 Concavoconvex
Measure with a measuring tool with an accuracy of 0.02mm. 6.3 Warp
Put the plate on a horizontal plane, take the diagonal line of the plate as the reference line, use a ruler with an accuracy of 1 mm to measure the maximum distance between the warped surface of the plate and the reference line, and then divide this distance by the length of the reference line (mm/m). 6.4 Plate size
6.4.1 Length and width
Measure with a steel tape measure with an accuracy of 1 mm.
6.4.2 Thickness
Measure with a measuring tool with an accuracy of 0.02 mm, and the distance between the measuring point and the edge of the plate should not be less than 20 mm. Measure one point every 100 mm in the width direction and take the maximum and minimum values. 6.5 Diagonal difference
Use a tape measure with an accuracy of 1mm to measure the length of the two diagonals of the sheet and take the difference in diagonal length. 6.6 Physical and mechanical properties
6.6.1 Sampling
Cut off the edges of the sheet with a width of 100mm on both sides of the longitudinal direction and sample evenly. The cell structure must not be destroyed during sampling. 6.6.2 Apparent density
Measured in accordance with GB/T6343, take the original thickness of the sheet. 6.6.3 Shore hardness
Measured in accordance with GB/T2411, measure the co-extruded surface, take the original thickness of the sheet. 6.6.4 Tensile strength and elongation at break
Measured in accordance with GB/T1040. The specimen is a type I specimen, take the original thickness of the sheet, and the tensile speed is 20mm/min±10%. 6.6.5 Simply supported beam impact strength
Measured in accordance with GB/T1043. The specimen is a type 1 specimen without a notch. The original thickness of the plate is taken and the co-extruded surface is impacted. 6.6.6 Vicat softening temperature
is measured according to GB/T1633. The test load is 9.8+49N, and the constant heating rate is (50±5)℃/h. 6.6.7 Heating dimensional change rate
is measured according to (GB/T8811. The test temperature is (70±2)℃. The test time is 2h, and the test results are the dimensional change rate values in the length and width directions.
6.6.8 Water absorption
is measured according to GB/T1034, the test temperature is (23±2)℃, and the test time is (24±1)h. 6.6.9 Bending strength
is measured according to GB/T9341, and the co-extruded surface is measured. 6.6.10 Combustion performance
is measured according to GB/T8624
6.6.11 Screw holding force
Measure in accordance with GB/T11718.9, measuring in the direction perpendicular to the co-extruded surface. 7 Inspection rules
Products must be inspected and certified by the manufacturer's quality inspection department in accordance with the factory inspection items of this standard before they can leave the factory.
7.1 Batch method
QB/T2463.3—1999
Plates produced continuously from the same batch of raw materials, the same formula, the same process, and the same specifications are considered a batch. The quantity of each batch shall not exceed 60t. is a sample unit.
7.2 Sampling
The inspection of the appearance and specification size of the plate shall be carried out according to the secondary normal sampling plan specified in GB/T2828, in which the inspection level is II and the qualified quality level (AQL) is 6.5. The inspection of warpage, diagonal difference and physical and mechanical properties is carried out in batches, and three sheets are randomly selected from each batch for testing.
7.3 Product inspection is divided into factory inspection and type inspection. Factory inspection items: appearance, warpage, dimensional limit deviation, diagonal difference, apparent density, and Shore hardness. Type inspection items: appearance, Warpage, dimensional limit deviation, diagonal difference, apparent density, Shore hardness, tensile strength, elongation at break, simply supported beam impact strength, Vicat softening point, heating dimensional change rate, bending strength. Combustion performance and screw holding force are only tested when required by the customer.
Type inspection is conducted once a year during normal production. Type inspection should be conducted in one of the following circumstances. a) When there are major changes in the main raw materials or processes; b) When production is resumed after more than half a year; c) When the results of the final inspection are significantly different from those of the last type inspection; d) When the national quality supervision department makes a request. 7.4 Judgment rules
7.4.1 Quality judgment of appearance and specification size According to the results of the sample inspection, if one or more indicators of the appearance and specification size do not meet the requirements of this standard, the sample unit shall be judged as a defective product.
Based on the results of the sample unit inspection, GB2828 is used to determine that if the number of unqualified sample units does not exceed the qualified determination number (A.) of the specified batch quality level, the quality of the delivery batch is qualified; if it exceeds the unqualified determination number (R.), the quality of the delivery batch should be determined to be unqualified; if it is between A. and R., a second sampling determination is carried out. 7.4.2 Determination of warpage, diagonal difference and physical and mechanical properties If there are unqualified items in the above items, double samples are drawn from the original batch and the unqualified items are re-tested. If the re-test is still unqualified, it is judged to be unqualified.
8 Marking, packaging, transportation, storage
8.1 Marking and labeling
The board packaging should be marked with product name, specification, trademark, batch number, manufacturer name, factory address, standard number, etc., and attached with product certificate.
Each board shall be marked with a self-adhesive label: product name, specification, batch number, production team, production date, standard number, etc. 8.2 Packaging
Product packaging can be made of cardboard, plywood, film, woven fabric, etc. as a protective layer and tied firmly with packing tape. 8.3 Transportation
During transportation, the boards should be protected from heavy pressure, sun exposure, rain and mechanical damage to keep the packaging intact. 8.4 Storage
Boards should be stacked horizontally in a dry, ventilated and clean warehouse, away from heat sources. The stacking height should not exceed 1m. 7292. Determination of warpage, diagonal difference and physical and mechanical properties If there are unqualified items in the above items, double samples will be drawn from the original batch, and the unqualified items will be retested. If the retest is still unqualified, it will be judged as unqualified.
8 Marking, packaging, transportation, storage
8.1 Marking and labeling
The board packaging should be marked with product name, specification, trademark, batch number, manufacturer name, address, standard number, etc., and a product certificate should be attached.
Each board should be marked with a self-adhesive label: product name, specification, batch number, production team, production date, standard number, etc. 8.2 Packaging
Product packaging can be made of cardboard, plywood, film, woven fabric, etc. as a protective layer and tied firmly with strapping tape. 8.3 Transportation
During transportation, the board should be protected from heavy pressure, sun exposure, rain and mechanical damage, and the packaging should be kept intact. 8.4 Storage
The boards should be stacked horizontally in a dry, ventilated, clean warehouse, away from heat sources. The stacking height should not exceed 1m. 7292. Determination of warpage, diagonal difference and physical and mechanical properties If there are unqualified items in the above items, double samples will be drawn from the original batch, and the unqualified items will be retested. If the retest is still unqualified, it will be judged as unqualified.
8 Marking, packaging, transportation, storage
8.1 Marking and labeling
The board packaging should be marked with product name, specification, trademark, batch number, manufacturer name, address, standard number, etc., and a product certificate should be attached.
Each board should be marked with a self-adhesive label: product name, specification, batch number, production team, production date, standard number, etc. 8.2 Packaging
Product packaging can be made of cardboard, plywood, film, woven fabric, etc. as a protective layer and tied firmly with strapping tape. 8.3 Transportation
During transportation, the board should be protected from heavy pressure, sun exposure, rain and mechanical damage, and the packaging should be kept intact. 8.4 Storage
The boards should be stacked horizontally in a dry, ventilated, clean warehouse, away from heat sources. The stacking height should not exceed 1m. 729
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