GB/T 24797.2-2022 in English
VALIDFilm for wrapping rubber bales―Part 2:Natural rubber
- Issued on:2022-10-12
- Implemented on:2023-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$160.00
$156.00
$156.00
《GB/T 24797.2-2022橡胶包装用薄膜 第2部分：天然橡胶》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC8（全国橡胶与橡胶制品标准化技术委员会天然橡胶分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Analysis of Key Points of Technical Specifications
| Technical Indicators | Requirements for the 2022 Edition | Differences from the 2014 Edition | Test Basis |
|---|---|---|---|
| Film Thickness | 0.03-0.05mm | New Requirements for Thickness Gauge | Micrometer/Thickness Gauge |
| LDPE Density | 0.92±0.01g/cm³ | New Parameters | GB/T 1033.1 Immersion method |
| Melting peak temperature | ≤113℃ | The method is changed to GB/T 19466.3 | DSC determination method |
Analysis of main technical evolution
The new version of the standard significantly improves the material control accuracy. The key changes are reflected in: clearly using non-recycled LDPE material (formerly known as PE-LD), adding density indicators to make detection operability, and replacing the VST temperature control method with DSC test.
Material Selection Specifications
- Raw Material Limitation: It must be produced by a special polycondensation process that has not been recycled
- Functional Additives: Formula systems that do not use slip agents/antioxidants are preferred (refer to international wheel production cases)
Typical Application Verification Data
| Parameter Group | Driving Load Test | Temperature Change Storage Test |
|---|---|---|
| 90 times/min dynamic peeling | Zero damage | - |
| 72h 60℃ high temperature | Stable shape | Film shrinkage ≤ 1.2% |
Test method change description
The adjustment of Vicat softening temperature test reflects two changes: physical index replacement (VST limit is derived from empirical formula) + localization adaptation of method (using GB series standards)...
Industrial implementation suggestions
- Establish LDPE material batch file management system
- Equip with new wavelength-resolving
DSC detector - Develop self-adhesive optimization process (refer to Malaysia's natural large mold slip experience)
Sample only — not a preview of GB/T 24797.2-2022
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