Inspection specifications for medium density fiberboard.
1. The purpose of this standard
To ensure the quality of the company’s cabinet products, medium density fiberboard raw materials for quality control, specially formulated this
specification
2. The scope of application of this standard applies to the incoming inspection of medium density plates for cabinets. 3. Reference standard
| GB/T | 11718 —— 1999 | Medium density fiberboard |
| GB/T | 18884 —— 2002 | Home kitchen equipment |
4. Classification of medium density fiberboard:
4． 1 Indoor medium density fiberboard for dry environments.
4． 2 Indoor moisture-proof medium density fiberboard for wet environments.
4． 3 Outdoor medium density fiberboard for outdoor use. Cabinets are generally used in raw materials are indoor type and indoor moisture-proof type medium density fiberboard. 5 Medium density fiberboard terminology
5． 1 Medium density fiberboard:
A sheet of plates that is pressed under heat and pressure conditions by applying argon or other synthetic resins as raw materials for wood fibers or other plant fibers. Other suitable additives can also be added to improve plate specificity.
5． 2 Indoor medium density fiberboard Does not have medium density fiberboards that are subjected to water impregnation or high humidity for a short period of time.
5． 3 Indoor moisture-proof medium density fiberboard:
Medium density fiberboard with short-term exposure to water impregnation or high humidity.
5． 4 Outdoor medium density fiberboard has the effect of weather conditions aging, water immersion or wet and hot with water vapor in ventilation
medium density fiberboard.
5． 5 Local softness: local looseness resulting from poor paving or poor glue.
5． 6 Corner defect: A defect caused by damage to the four corners or edges of a plate.
6 Inspection requirements
6． 1 Appearance quality requirements and specification size requirements:
| examine | The main | Technical requirements | Test methods | Test tool |
| Soft test Corners | Sensory tests are not allowed | Observation | eye-measurement | |
| Defect measurement | Sensory tests are not allowed | Observation | eye-measurement | |
| Oil pollution | Sensory tests are not allowed | Observation | eye-measurement | |
| Dark spots | Sensory tests are not allowed | Observation | eye-measurement | |
| separated layer | Sensory tests are not allowed | Observation | eye-measurement | |
| Thickness | ±0.20 mm | Total of 8 points were measured with the cursor caliper on the four sides of the board inward 25 mm in the four corners and inward 25 mm in the middle of the plate, taking the arithmetic mean (Note: The thickness of each measuring point in each plate must not exceed ± 0.15 mm) of its average card value. | vernier caliper | |
| Length and width | +5mm | Use a steel tape measure the length on both sides of the plate width and the width on both sides of the plate length | Steel ruler | |
| degree deviation diagonal difference | ≤6 mm | Measure the two diagonal lengths of the plate with a steel tape measure and calculate the two diagonals volume difference. ruler | Steel ruler | |
| The edges are not straight | ≤1.5mm/m | Point the side edge (or thin wire rope) of the steel tape measure at the same side of the plate volume Angle, measuring the edge of the plate with a steel tape measure (or thin wire rope). The maximum deviation between the plates, all sides of the plate to be measured. | steel measure tape | |
| Warpage(warp value) | 1、1m≤ diagonal Line ≤ 2m≤1 mm 2、2m< diagonal Line ≤ 3m ≤3 mm 3, 3mm≤diagonal≤4 mm | Steel Places the medium-density fiberboard concave face up on the horizontal countertop, connecting the two diagonals of the plate with the side edges (or thin wire ropes) of the coiled steel ruler, and the steel ratio of the maximum string height (warp value) with the steel ruler amount and the diagonal length is warping | steel measure tape | |
Note: The appearance quality test is an approximate natural light in the range of 300-600LX (e.g. 40W flulights) with a line-of-sight of 700 mm -1000 mm, which is tested by two persons in most phases The same conclusion is the test result.
6． 2 Supplier must provide a mid-density fiberboard physical mechanics performance test report, including internal binding strength, stillness strength, grip screw force, absorbent thickness expansion rate, moisture content, density, test results in accordance with GB/T11718- 1999 Requirements for the physical and mechanics performance indicators of medium-room pattern plates. Must also include free formaldehyde release testing, test results in line with GB/T18884- 2002 provisions of the health, environmental protection requirements, that is: free formaldehyde release of human plate ≤ 9 mg / 100 g.
6． 3 Other special requirements of the company for medium density fiberboard are stated in the procurement contract.
7 Inspection rules The company’s inspection of medium density fiberboard is sampled 7. 1 Appearance quality sampling rules
| Batch range 51—— 90 | The number of samples 13 | Number of pass verdicts 1 | Number of failed verdict 2 | Sample pass 12 |
| 91—— 150 | 20 | 2 | 3 | 18 |
| 151—— 280 | 32 | 3 | 4 | 29 |
| 281—— 500 | 50 | 5 | 6 | 45 |
| 501—— 1200 | 80 | 7 | 8 | 73 |
| 1201—— 3200 | 125 | 10 | 11 | 115 |
| 3201—— 10000 | 200 | 14 | 15 | 186 |
| 10001—— 35000 | 315 | 21 | 22 | 294 |
7． 2 Specification size inspection rules
| Batch range 51—— 90 | The number of samples 5 | Number of pass verdicts 1 | Number of failed verdict 2 | Sample pass 4 |
| 91—— 150 | 8 | 1 | 2 | 7 |
| 151—— 280 | 13 | 2 | 3 | 11 |
| 281—— 500 | 13 | 2 | 3 | 11 |
| 501—— 1200 | 20 | 3 | 4 | 17 |
| 1201—— 3200 | 32 | 5 | 6 | 27 |
| 3201—— 10000 | 32 | 5 | 6 | 27 |
| 10001—— 35000 | 50 | 7 | 8 | 43 |
7． 3 The inspection of the physical and mechanics properties of medium density fiberboards shall be subject to the inspection reports provided by the supplier (for grip strength, static strength performance, the quality inspector may check under the company’s existing conditions or on the basis of experience), and the supplier shall be responsible for the consequences of the product quality affected by the non-conformity of the physical mechanics of the artificial plate.
7． 4 For the special requirements specified in the procurement contract, the quality inspector shall inspect them in accordance with the requirements of the contract.
7． 5 Overall verdict: 7. 1、7． 2、 7． 3、 7． 4 Each is judged to be qualified when it meets the requirements.
8 Marking, packaging, transportation and storage
8． 1 Mark: The product should be stamped with a label indicating the type, grade, date of manufacture, and inspector code
remember.
8． 2 Packaging: Products should be properly packaged according to different types, specifications, grades. Each package shall indicate the manufacturer’s name, product name, trademark, specification, number of grades and label of the product standard number.
8. 3 Transport and storage Products in transport and storage should pay attention to moisture, rain, sun protection, deformation protection. Additional note: This standard is proposed by the Quality Department.