GB/T 36872-2018 in English
VALIDCode of glued laminated timber production
- Issued on:2018-09-17
- Implemented on:2019-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$670.00
| Standard No: | GB/T 36872-2018 |
| Document status: | VALID |
| Title in English: | Code of glued laminated timber production |
| Title in Chinese: | 结构用集成材生产技术规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2018-09-17 |
| Implemented on: | 2019-04-01 |
| ICS Classification: | 79.060.99-Other wood-based panels |
| Chinese Classification: | B70-Artificial board |
| Professional Classification: | GB-National Standard |
| Related Keywords: | laminated timber production introduction analysis
environmental control production temperature ≥15℃ key production production processes new production line |
| Related Topics: | The structure of trapping hydrazine
Techniques for Measuring the Structure of Materials structural imaging secondary structure composition Device Integration Technology secondary structure formation root primary structure GBT36872 GB/T 36872-2018 Technical regulations for the application of ecological sintering materials Integrated technology provides |
《GB/T 36872-2018结构用集成材生产技术规程》由TC198（全国人造板标准化技术委员会）归口，主管部门为国家林业和草原局。
Introduction
Analysis of the core content of the standard
GB/T 36872-2018 is the authoritative technical specification for the production of structural laminated wood in my country, and is applicable to the quality control of the entire process of glulam manufacturing. The standard has established a complete technical system from personnel qualifications, equipment conditions to production processes and inspection methods.
Key production technical requirements
| Technical links | Core parameters | Allowance deviation |
|---|---|---|
| Layer moisture content | 8%-15% | Moisture content difference of the same layer ≤3% |
| Gluing surface processing | Knife mark width≤2mm | Thickness deviation of 1m length 0.1-0.2mm |
| Finger jointing pressure | Coniferous wood 2-10MPa Broadleaved wood 5-13MPa | Pressure fluctuation≤10% |
Tree species classification and application
The standard divides applicable tree species into five tree species groups (SZ1-SZ5), among which Acer truncatum, Birch, etc. are classified as high-strength tree species in SZ1 group, and Cunninghamia lanceolata, Crysanthemum fortunei, etc. are classified as SZ5 group. Elastic modulus requirements for different tree species:
- SZ1 group: flexural modulus ≥18GPa
- SZ3 group: flexural modulus ≥12GPa
- SZ5 group: flexural modulus ≥7GPa
Quality control system
Three-level inspection system
- Initial inspection: 12 basic tests must be completed when a new production line is started
- Full inspection: 100% of the plywood must be visually inspected or mechanically graded
- Sampling inspection: Sampling according to Table 27-28 of GB/T 26899-2011
Typical test case: Boiling peel test requires the adhesive layer peeling rate ≤15%, and the average value ≤10%
Implementation suggestions
Key points of environmental control
- Production temperature ≥15℃, gluing area ≥20℃
- Relative humidity 30%-75%
- Humidity during curing stage ≥30%
Process optimization direction
For the high frequency heating process, it is recommended:
- Control the heating temperature not to exceed the upper limit of the adhesive
- The load can be reduced to 70% of the standard value during the curing process
- Avoid external force interference when moving heating
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