GH/T 1340-2021 in English
VALIDTechnical requirements for cotton packing material processing
- Issued on:2021-07-07
- Implemented on:2021-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
本文件规定了棉花包装材料的加工要求、过程监控要求以及检验要求。
本文件适用于棉花包装材料加工企业开展对棉花包装聚酯捆扎带、棉花包装用聚乙烯套袋、棉花包装纯棉包装袋以及棉花打包用镀锌钢丝的加工。
Introduction
Interpretation of the core content of the standard
GH/T 1340-2021 systematically regulates the processing technology system of four types of cotton packaging materials for the first time: polyester strapping, polyethylene bags, pure cotton packaging bags and galvanized steel wire. The standard forms a closed-loop management from raw material access, process parameters, environmental control to quality inspection.
| Material type | Key process parameters | Core performance indicators | Special additives |
|---|---|---|---|
| Polyester strapping tape | Melt temperature ≤285℃ ≥2 stretching | Intrinsic viscosity ≥0.85dl/g | Toughening agent ≥1.5% |
| Polyethylene bagging | Melt temperature ≤200℃ Micropore area 1.5-1.9㎡ | Tensile breaking stress ≥26MPa | Antioxidant ≥2% |
| Galvanized steel wire | Zinc layer ≥ 55g/㎡ Length error ≤ 0.3% | Strength loss ≤ 15% | Environmentally friendly cleaning agent |
Key points of technological evolution and innovation
Compared with traditional processes, this standard highlights three major technological breakthroughs: material modification technology (such as polyester toughening), microporous molding technology (conical needle punching process) and environmentally friendly process (hazardous chemicals processing equipment). The total microporous area of the polyethylene bag is precisely controlled within the range of 1.4976-1.8656㎡, which ensures both air permeability and packaging strength.
Typical application cases
After a packaging company in Xinjiang implemented the standard:
1. The breaking force of polyester strapping tape increased by 18%
2. The uniformity of the zinc layer of galvanized steel wire increased to 98%
3. The bag collapse rate dropped from 3.2% to 0.5%
Implementation suggestions
- Equipment modification: The melting equipment needs to be equipped with a temperature closed-loop control system (±1℃ accuracy)
- Process monitoring: Establish a three-level inspection record of raw materials-semi-finished products-finished products
- Environmental compliance: Equipped with an online monitoring system to meet the emission requirements of GB 16297
- Staff training: Focus on cultivating the ability to adjust process parameters and identify defects
Inspection system construction
The standard requires the establishment of a three-level inspection system:
| Raw material incoming inspection | 7 items such as characteristic viscosity and cotton content |
| Process random inspection | 5 items such as melt temperature and number of stretching |
| Factory full inspection | 9 items such as physical properties and label integrity |
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