Hollow Particle Board (Tubular Chipboard) Test Report for Wood Door Manufacturing
The core material plays an important role in the structural performance and overall quality of an interior wood door. To evaluate the physical and chemical properties of the hollow particle board used as a door core material, a 40 mm hollow particle board sample was submitted for laboratory testing.
The test was conducted by the Shanghai Institute of Quality Inspection and Technical Research (SQI), with testing performed according to relevant Chinese standards for wood-based panels and formaldehyde emissions.
The test results showed that all tested items met the applicable technical requirements, including moisture content, thickness swelling, board density, static bending strength, internal bond strength, and formaldehyde emission.
Test Information
| Item | Details |
|---|---|
| Sample Name | Hollow Particle Board |
| Type / Thickness | 40 mm |
| Sample Size | 500 × 500 × 40 mm |
| Testing Purpose | Commissioned Testing |
| Testing Laboratory | Shanghai Institute of Quality Inspection and Technical Research |
| Testing Standard | GB/T 17657-2022 |
| Formaldehyde Standard | GB 18580-2017 |
| Product Standard | LY/T 1856-2009 |
| Test Date | October 24 – November 13, 2025 |
| Report No. | W02527227171 |
The report identifies the tested material as 40 mm hollow particle board and records the sample size as 500 × 500 × 40 mm. The testing was conducted at the Shanghai Institute of Quality Inspection and Technical Research.
Hollow Particle Board Test Results
The laboratory evaluated six key properties of the tested hollow particle board.
| Test Item | Technical Requirement | Test Result | Assessment |
|---|---|---|---|
| Moisture Content | 5–13% | 7.7% | Compliant |
| Thickness Swelling | ≤5% | 2.2% | Compliant |
| Board Density | <550 kg/m³ | 260 kg/m³ | Compliant |
| Static Bending Strength | ≥1.0 MPa | 2.0 MPa | Compliant |
| Internal Bond Strength | ≥0.10 MPa | 0.32 MPa | Compliant |
| Formaldehyde Emission | E1: ≤0.124 mg/m³ | 0.011 mg/m³ | Compliant |
According to the laboratory report, all six tested items met the corresponding technical requirements.
1. Moisture Content: 7.7%
The tested hollow particle board recorded a moisture content of 7.7%, within the specified range of 5–13%.
Moisture content is an important property for wood-based panels because excessive moisture can affect dimensional stability during storage, processing, and use.
For door manufacturing, controlled moisture content provides a more consistent material condition for subsequent processing and assembly.
2. Thickness Swelling: 2.2%
The thickness swelling result was 2.2%, compared with the technical requirement of ≤5%.
This test evaluates the dimensional change of the board after water exposure. A lower thickness swelling value indicates less thickness expansion under the specified test conditions.
For interior door applications, dimensional stability is particularly relevant because excessive expansion can affect the fit and appearance of finished door components.
3. Board Density: 260 kg/m³
The tested board had a measured density of 260 kg/m³, meeting the specified requirement of less than 550 kg/m³.
Hollow particle board is designed with a tubular or hollow internal structure, which can provide a relatively lightweight core material.
For interior door manufacturing, a lightweight core can be beneficial when considering the overall weight of the finished door and the handling requirements during installation.
4. Static Bending Strength: 2.0 MPa
The static bending strength result was 2.0 MPa, exceeding the specified minimum requirement of 1.0 MPa.
Static bending strength reflects the board's resistance to bending under the specified laboratory test conditions.
For door manufacturers, this property is one of the material performance indicators that can be considered when evaluating the suitability of a panel for use as part of a door construction.
5. Internal Bond Strength: 0.32 MPa
The internal bond strength was measured at 0.32 MPa, compared with the minimum requirement of 0.10 MPa.
Internal bond strength evaluates the bonding strength within the board structure. The result indicates that the tested sample met the applicable requirement for this property.
Consistent internal bonding is important for maintaining the structural integrity of wood-based panel materials during processing and use.
6. Formaldehyde Emission: 0.011 mg/m³
One of the key results in the report is the formaldehyde emission value.
The tested hollow particle board recorded a formaldehyde emission of:
0.011 mg/m³
The applicable E1 requirement specified in the report is:
≤0.124 mg/m³
Therefore, the measured value was substantially below the specified limit.
The report identifies the formaldehyde testing requirement under GB 18580-2017, the Chinese standard for formaldehyde emission limits from wood-based panels and related products used in interior decoration.
What These Results Mean for Wood Door Manufacturing
The laboratory results provide technical data for evaluating the tested hollow particle board as a wood door core material.
The combination of the tested properties covers several important aspects of the material:
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Moisture content provides information about the material's moisture condition.
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Thickness swelling provides information about dimensional change under the specified test conditions.
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Board density indicates the measured density of the tested panel.
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Static bending strength evaluates resistance to bending under the laboratory test method.
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Internal bond strength evaluates bonding within the board structure.
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Formaldehyde emission provides data on the material's formaldehyde release level under the specified test conditions.
Together, these results provide a documented reference for material quality evaluation and raw-material selection in wood door manufacturing.
Tested by an Independent Quality Inspection Institution
The testing was conducted by the Shanghai Institute of Quality Inspection and Technical Research (SQI).
The report states that the relevant testing was carried out according to GB/T 17657-2022, GB 18580-2017, and LY/T 1856-2009, covering physical and chemical performance testing of wood-based panels and formaldehyde emission requirements.
The report also states that the results of a commissioned test apply to the samples provided by the client. Therefore, the results should be understood specifically as test results for the submitted hollow particle board sample rather than as a certification covering every wood door or every production batch.
Conclusion
The hollow particle board sample tested in report W02527227171 met the specified technical requirements for all six tested properties.
The material recorded:
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7.7% moisture content
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2.2% thickness swelling
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260 kg/m³ board density
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2.0 MPa static bending strength
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0.32 MPa internal bond strength
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0.011 mg/m³ formaldehyde emission
These laboratory results provide documented technical information about the tested hollow particle board and support its evaluation as a raw material for wood door manufacturing.
For project-specific wood door requirements, Zonle Doors can provide product specifications, material information, testing documentation, and OEM/ODM solutions according to your project needs.
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