This standard specifies the inspection method, inspection rules and test methods of solid wood flooring. This standard applies to the inspection of solid wood flooring and related physical and mechanical performance tests. GB/T 15036.2-2001 Inspection and test methods for solid wood flooring GB/T15036.2-2001 Standard download decompression password: www.bzxz.net

GB/T15036.2---2001
GB/T15036.6*-1994 "Inspection and Test Methods of Solid Wood Flooring Blocks" has been implemented for six years since October 1, 1994. It has played an important role in the production, distribution, use and foreign trade of solid wood flooring in my country. In recent years, due to the development of science and technology and market economy, the production of solid wood flooring in my country has developed rapidly. The original standard is no longer suitable for the needs of the situation and it is necessary to revise it. The important modifications and supplements to this standard to the previous version are: the inspection part of GB/T15036.1--1994 and the content of GB/T15036.6--1994 are merged. The inspection content of painted solid wood flooring is added; the content of hardness, impact toughness and wear resistance of plain floor blocks is cancelled in the test method, and the inspection and test methods of physical and mechanical performance indicators such as surface adhesion, wear resistance and hardness of painted flooring are added. From the date of implementation, this standard will replace GB/T15036.6-1994 at the same time. This standard is proposed by the State Forestry Administration.
This standard is under the jurisdiction of the China Timber Standardization Technical Committee. This standard was drafted by the Sawn Timber Subcommittee of the China Timber Standardization Technical Committee and Guangdong Yingbin Wood Industry Co., Ltd. The participating drafting units of this standard are: Shanghai Timber Industry Research Institute, Shanghai Building Materials and Components Quality Supervision and Inspection Station, Guangdong Shunde Xigui Chemical Co., Ltd.
The main drafters of this standard are: Wang Tieli, Yu Xuebin, Lu Bin, Zhang Yinghong, Lou Minggang, Peng Jianhua, Yang Weiming. This standard is interpreted by the China Timber Standardization Technical Committee. 1 Scope
National Standard of the People's Republic of China
Solid wood flooring
Inspection and test methods
Solid wood flooring--Examination and test methods This standard specifies the inspection methods, inspection rules and test methods of solid wood flooring. This standard applies to the inspection of solid wood flooring and related physical and mechanical properties tests. 2 Reference standards
GB/T 15036. 2--2001
Replaces GB/T15036.6--1994
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 will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 2828--1987
Batch inspection sampling procedure and sampling table (applicable to inspection of continuous batches)GB/T 4822--1999
Inspection of sawn timber
GB/T 4823--1995
Defects in sawn timber
: Determination of film hardness by pencil method
GB/T 6739--1996
GB/T 9286--1998
Scratching test for paints and varnishes
GB/T 15102—1994
Artificial board with impregnated paper
GB/T 17657--1999
Test methods for physical and chemical properties of artificial boards and veneer artificial boards 3 Inspection items and methods
The inspection items of solid wood flooring include processing accuracy, appearance inspection and physical and mechanical properties inspection. 3.1 Processing accuracy inspection
3.1.1 Measuring tools
3.1.1.1 Steel tape measure, with an accuracy of 1.0mm. 3.1.1.2 Steel ruler, with an accuracy of 0.5mm. 3.1.1.3 Micrometer, with an accuracy of 0.01mm. 3.1.1.4 Vernier caliper, with an accuracy of 0.02mm. 3.1.1.5 Feeler gauge, with an accuracy of 0.01mm.
3.1.2 Measurement method
3.1.2.1 Length (1) measurement
The length (1) measurement is measured along the width direction of the floor at 10 mm from the edge of the floor with a steel tape measure or steel ruler, accurate to 0.5 mm, see Figure 1.
3.1.2.2 Width (w) measurement
The width () measurement is measured along the length direction of the floor at 20 mm from the edge of the floor and at the center of the floor with a vernier caliper, accurate to 0.02 mm, see Figure 2.
3.1.2.3 Thickness (t) calibration
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on November 12, 2001 and implemented on May 1, 2002
GB/T15036.2—2001
Thickness (t) calibration is measured with a dry ruler at the four corners of the floor and the midpoint of the long side of the floor and 20mm away from the edge of the floor, with an accuracy of 0.01mm, see Figure 3.
3.1.2.4 Squareness (g) calibration
Straightness (g) calibration is measured with a feeler gauge with one side of the square ruler close to the long side of the floor and the maximum distance between the other side of the square ruler and the end of the floor, with an accuracy of 0.01mm, see Figure 4.
Unit: mm
Figure 1 Length calibration diagram
Unit: mm
Figure 2 Width calibration diagram
Figure 3 Thickness calibration diagram
Figure 4 Perpendicularity calibration diagram
Unit: mm
3.1.2.5 Warpage calibration
3.1.2.5.1 Transverse bend (lateral bend, edge bend)
GB/T15036.2—2001
Transverse bend (s) calibration is to measure the maximum arch height between the board edge and the steel ruler with a feeler gauge along the length direction of the floor, with an accuracy of 0.01mm, using a 1m long steel ruler (or thin steel wire rope) close to the two ends of the floor; the ratio of the maximum arch height to the measured length is the transverse bend warpage, expressed as a percentage, with an accuracy of 0.01%. See Figure 5. *-+
Figure 5 Transverse bend calibration diagram
3.1.2.5.2 Warp (tile bend)
Warp (c) calibration is to place the floor with the concave surface facing upward on the test table, use a steel ruler close to the two long sides of the floor, and use a feeler gauge to measure the maximum arch height between the board edge and the steel ruler, accurate to 0.01mm; the ratio of the maximum arch height to the measured width is the warpage of the warp, expressed as a percentage, accurate to 0.01%, and the measurement position is any corresponding part of the long side. See Figure 6. Figure 6 Warp calibration diagram
3.1.2.5.3 Curve (bow)
The calibration of the curve (6) is to place the narrow side of the floor upright on the horizontal test bench and use a steel ruler (or thin steel wire rope) close to the two ends of the floor to measure the maximum arch height, accurate to 0.01mm; the ratio of the maximum arch height to the measured length is the curvature of the curve, expressed as a percentage, accurate to 0.01%, and the measurement position is any corresponding part of the end edge. See Figure 7. .f.
Figure 7 Curve calibration diagram
3.1.2.6 Assembly gap (o) and height difference (h) calibration Assemble 10 floors tightly as shown in Figure 8 and place them on the horizontal test bench. Use a feeler gauge to measure the assembly gap (u) and height difference (h) of the 18 points shown in Figure 8, accurate to 0.01mm. Calculate the average value respectively, accurate to 0.01mm. t
3.2 Appearance quality inspection
GB/T 15036.2-2001
Figure 8 Assembly gap and height difference inspection diagram
3.2.1 The inspection method for material and processing defects shall be carried out in accordance with the provisions of Chapter 4 of GB/T4823--1995. 3.2.2 Appearance quality shall be determined by visual inspection and block-by-block inspection according to the appearance quality requirements. 3.3 Physical and mechanical properties inspection
3.3.1 Provisions for test piece preparation, test piece size and quantity3.3.1.1 Samples shall be randomly selected from products that have passed the factory inspection or from products that have not been opened and used. 3.3.1.2 According to the batch size of the product, 28 floor blocks shall be randomly selected from the sample as test pieces. The preparation position, size specifications and quantity of the test pieces shall be carried out in accordance with the requirements of Figure 9 and Table 1. If the size of the floor blocks is too small to meet the requirements for the size and quantity of the specimens, continue to randomly select from the sample until all the required specimens can be cut out. Figure 9 Specimen preparation schematic diagram
Specimen specifications and quantity of solid wood floor performance specimens
Test items
Specimen moisture content
Paint board surface wear resistance
Paint film adhesion
Paint film hardness
Specimen size
20.0×board width
100.0×100.0
250.0×board width
100.0×board width
Product batch range, pieces
>500～≤1000
1When preparing the paint board surface wear resistance specimen, if the specimen width does not reach 100mm, two specimens can be spliced ​​together by gluing, and the splicing line should be centered as much as possible, and the splicing seam should be flat.
2The surface paint film and groove should be removed for the paint board moisture content specimen. The edges and corners of the test piece should be straight without chipping. The allowable deviation of length and width is ±0.5mm, except for the surface wear test piece with a thickness of 8mm ± 0.5mm, the other 3
test pieces are the actual thickness of the floorboards. wwW.bzxz.Net
3.3.2 Test method
3.3.2.1 Wood moisture content
3.3.2.1.1 The number and specifications of the test pieces shall be in accordance with 3.3.1. 3.3.2.1.2 The principle, instrument, method and result expression shall be in accordance with 4.3.1, 4.3.2, 4.3.4 and 4.3.5 of GB/T17657--1999. 3.3.2.2 Surface wear resistance
3.3.2.2.1 The number and specifications of the test pieces
shall be in accordance with 3.3.1.
3.3.2.2.2 Principle
GB/T 15036.2—2001
After a certain number of revolutions, the surface wear loss and the ability to retain the paint film. Determine the relative friction between the paint film on the product surface and the grinding wheel of a certain particle size. 3.3.2.2.3 Instruments and tools
a) Table type or equivalent wear test machine; b) Workbench speed 60r/min±2r/min; c) Balance, sensitivity 0.001g;
d) Emery cloth, 180#0/3;
e) Grinding wheel;
f) Absorbent gauze.
3.3.2.2.4 Test steps
a) Make the grinding wheel according to Appendix A of GB/T15102-1994, and place the grinding wheel with sandpaper at a relative humidity of 65%±5% and a temperature of 20℃±2C for more than 24 hours for standby use. b) Wipe the surface of the test piece with degreased gauze and weigh it to an accuracy of 1mg. If the thickness of the test piece affects the horizontality of the grinding wheel bracket, the test piece should be sawn thinner.
c) Install the test piece with the paint side facing up on the abrasion tester, and install the grinding wheel on the bracket. Wear for 100r under the condition of 4.9N±0.2N force on each contact surface, remove the test piece, remove the dust on the surface and weigh it to an accuracy of 1mg. 3.3.2.2.5 The calculation of the abrasion results is shown in formula (1): F·G·G
Where: F.—abrasion value, g/100r;
G—mass of the specimen before abrasion·g;
G—mass of the specimen after abrasion, g.
Record the abrasion value and visually observe the condition of the paint film on the surface of the test piece. 3.3.2.3 Paint film adhesion
3.3.2.3.1 The number and specifications of the test pieces
Perform in accordance with the provisions of 3.3.1.
3.3.2.3.2 Principle
The resistance of the coating to detachment from the substrate is assessed when a sharp blade cuts the coating in a right-angle grid pattern and penetrates to the substrate. 3.3.2.3.3 Apparatus
a) Single-edged or multi-edged cutting tool, as shown in Figure 1 of GB/T9286--1998; b) Blade spacing device of single-edged cutting tool (2mm spacing), as shown in Figure 2 of GB/T9286--1998; c) Soft brush;
d) Visual magnifier, hand-held type, with a magnification of 2 or 3 times. 3.3.2.3.4 Test steps
a) Take three test areas on the test piece, as shown in Figure 10. Unit: mm
. (1)
Figure 10 Test area diagram of paint film adhesion test piece b) Hold the cutting tool so that the knife is perpendicular to the sample surface, apply uniform force to the cutting tool, and form six cutting lines on the coating at a uniform cutting rate in the spacing guide device. You can also use a multi-edged cutting tool with 6 cutting knives to form six cutting lines at one time. All cuts should be made through the bottom surface.
GB/T 15036.2--2001
c) Repeat the above operation and make the same number of parallel cuts, intersecting the original cuts at a 90° angle to form a grid pattern. d) Use a soft brush to gently sweep back several times and then forward several times along each diagonal line of the grid pattern. e) Under the observation light, use a magnifying glass to carefully check the paint film damage in the test area from all directions. f) During the test, the blade edge should be checked frequently. If wear and chipping are found, the blade should be replaced immediately. 3.3.2.3.5 Results and judgment
If the results of the three test areas are consistent, the classification shall be carried out according to the provisions of 8.3 of GB/T9286--1998. If the results of the three test areas are inconsistent, the above test shall be repeated at more than three different locations. 3.3.2.4 Hardness of paint film
3.3.2.4.1 Preparation of test piece
According to the provisions of 3.3.1.
3.3.2.4.2 Principle
By using a pencil with known hardness number to scratch the coating film, the hardness of the film is expressed by the pencil hardness number. 3.3.2.4.3 Apparatus and equipment
According to the provisions of 4.1 of GB/T6739-1996. 3.3.2.4.4 Test steps
a) Preparation of test pencils shall be in accordance with the provisions of 3.4.2 of GB/T6739-1996; b) Test shall be carried out in accordance with the provisions of 4.4.3, 4.4.4 and 4.4.6 of GB/T6739-1996. 3.3.2.4.5 Result evaluation
According to the provisions of 4.5.2 of GB/T67391996. 4 Inspection rules
4.1 Inspection classification
Product inspection is divided into factory inspection and type inspection. 4.1.1 Factory inspection includes:
a) Appearance quality inspection;
b) Processing accuracy inspection;
c) Wood moisture content inspection.
4.1.2 Type inspection includes all items of factory inspection and all contents of physical and mechanical properties inspection items. 4.1.3 Type inspection should be carried out in the following circumstances: a) When there are major changes in raw and auxiliary materials and production; b) When production is resumed after a long-term suspension;
c) During normal production, inspection shall be carried out no less than twice a year; d) When the quality supervision agency puts forward type inspection requirements. 4.2 Sampling method and judgment principle
4.2.1 The product quality inspection of solid wood flooring shall be carried out by sampling samples from the same batch of products, i.e. the same batch, the same specification, and the same type of products according to the regulations and inspecting the samples one by one. The samples are calculated by the number of pieces. 4.2.2 Processing accuracy inspection
4.2.2.1 The samples for length, width, thickness, straightness, and warpage inspection shall adopt the secondary sampling plan in GB/T2828-1987, with the inspection level of 1 and the qualified quality level of 4.0. See Table 2. Batch range
～150
151~280
281～500
501~~1200
1201~3200
3 201～10 000
Note: If the number exceeds 10000 pieces, it shall be processed as another batch.
GB/T 15036.2-2001
Table 2 Sampling plan for size inspection
Sample size
Cumulative sample size
Number of qualified judgments
Number of unqualified judgments
4.2.2.2 The number of samples for assembly gap and assembly height difference inspection is 10 pieces, which are randomly selected from the inspected samples, and a single sampling plan is adopted. 4.2.3 Appearance quality inspection
4.2.3.1 The secondary sampling plan in GB/T2828-1987 is adopted, the inspection level is II, and the qualified quality level is 4.0, see Table 3. Table 3 Sampling plan for appearance quality inspection
Batch range
151~280
281~500
501~~1 200
1201~3200
320110000
Note: If the number exceeds 10000, it shall be processed as another batch.
Sample size
Cumulative sample size
Number of qualified judgments
4.2.3.2 When there are multiple defects on a floor at the same time, the defect that has the greatest impact on the product grade shall be judged. Number of unqualified judgments
4.2.4 Physical and mechanical properties inspection
When all physical and mechanical properties inspections are qualified, the physical and mechanical properties inspection of this batch of products is judged to be qualified, otherwise the unqualified indicators should be re-inspected once with double the provisions of 3.3.1, and if the re-inspection is qualified, it is judged to be qualified; if it is still unqualified, it is judged to be unqualified. 4.3 The name of the wood indicated on the product packaging should be consistent with the actual tree species, otherwise it is judged to be unqualified. 20
GB/T 15036.2--2001
4.4 Comprehensive judgment
When the product appearance quality, processing accuracy and physical and mechanical properties inspection results all meet the technical requirements of the corresponding category and grade, the batch of products is judged to be qualified, otherwise it is judged to be unqualified products or should be downgraded. 4.5 Inspection report
The inspection report should include:
a) the category, grade, inspection standard, inspection category, etc. of the inspected product; b) the inspection results and their conclusions;
c) various abnormal situations that occurred during the inspection and the issues that must be explained. 21
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