GB/T 45296-2025 in English
VALIDCode of practice for drying of silkworm cocoons
- Issued on:2025-02-28
- Implemented on:2025-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$262.00
| Standard No: | GB/T 45296-2025 |
| Document status: | VALID |
| Title in English: | Code of practice for drying of silkworm cocoons |
| Title in Chinese: | 桑蚕茧干燥技术规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2025-02-28 |
| Implemented on: | 2025-09-01 |
| ICS Classification: | 65.020-Farming and forestry |
| Chinese Classification: | B47-Beekeeping, silkworm keeping |
| Professional Classification: | GB-National Standard |
| Related Keywords: | formation drying time
stove technology quality control indicators temperature control high temperature zone silkworm cocoons introduction analysis high temperature zone/medium temperature stove humidity management high temperature |
| Related Topics: | wild silkworm
silkworm |
《GB/T 45296-2025桑蚕茧干燥技术规程》由TC437（全国桑蚕业标准化技术委员会）归口，主管部门为农业农村部。
Introduction
Analysis of the core content of the standard
| Technical elements | Cocoon drying machine technology | Cocoon drying stove technology | Quality control indicators |
|---|---|---|---|
| Temperature control | High temperature zone 130±5℃ | First flushing 110℃/second flushing 100℃ | Standard for pupa pulping and flake formation |
| Drying time | 4.5-6.5 hours | First flushing 2-3h/second flushing 3h | Drying rate 60% out of stove |
| Humidity management | High temperature zone ≤6%RH | Timed exhaust control | Moisture regain 11-12% |
Key technical points
Drying equipment selection: The standard recommends two types of equipment: automatic circulation hot air cocoon drying machine and car fan cocoon drying stove. The cocoon drying machine needs to be equipped with a temperature gradient control system (high temperature zone/medium temperature zone/low temperature zone), and the wind speed is controlled in the range of 0.4-1m/s.
Fresh cocoon handling specifications: The stacking time is ≤24h in spring and ≤16h in summer and autumn. The cocoon baskets should be stacked in a "品" shape with no more than 8 layers. Every 1000kg of fresh cocoons should be equipped with 240-300 standard cocoon baskets.
Implementation suggestions
1. Preparation before drying: Equipment maintenance should be completed 30 days in advance. Fuel reserves should require smokeless lump coal with a calorific value of ≥29,000kJ/kg and a sulfur content of <0.8%
2. Process control: Establish a "three properties" measurement system (cocoon properties/stove properties/coal properties). The cocoon drying machine needs to check the network speed deviation every day, and the cocoon drying stove should record the shunting time and coal addition amount
3. Quality traceability: The information of the factory should be marked after the dried cocoons are packed, and the "three distances" principle should be implemented when stacking (0.7m from the wall/1.4m from the aisle/1.0m from the row)
Standard evolution analysis
Compared with the old version of the standard, GB/T The main upgrades of 45296-2025 are as follows: ① Added the process parameters of automatic circulating hot air cocoon drying machine; ② Refined the moisture regain detection method (three measurements of 50g sample); ③ Clarified the abnormal cocoon package processing process (moldy cocoons/damp cocoons classification and disposal). After the implementation of the standard, it is expected to reduce the cocoon quality damage rate by more than 15%.
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