SN 1309.3-2003 in English
SUPERSEDEDRules for inspection of footwear - Rules for inspection of plastics footwear
- Issued on:2003-08-18
- Implemented on:2004-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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本部分规定了塑料鞋的抽样、检验、结果判定及不合格处置。本部分适用于以塑料材料为鞋面的鞋靴的检验。本部分不适用于以人造革、合成革为鞋面的鞋靴的检验。
Introduction
Standard Framework and Technological Evolution
| Comparison Dimensions | SN 1309.3-2003 | Replaced Standard |
|---|---|---|
| Scope of Application | Fully Covers Plastic Footwear | Limited to EVA Beach Shoes/Children's Shoes |
| Inspection Items | Added 5 types of physical safety performance | No systematic safety requirements |
| Test Methods | Cited 23 national standard methods | Incomplete method system |
Analysis of core inspection requirements
1. Health and safety performance
Four types of toxic substances must be tested: banned azo dyes (GB/T 17592 series), formaldehyde (GB/T 2912.1), pH value (GB/T 7573), and heavy metals (GB/T 17593). Taking children's shoes as an example, the formaldehyde content must be ≤75mg/kg, and the extractable heavy metal lead must be ≤90mg/kg.
2. Physical and mechanical safety performance
| Key indicators | Test method | Limit requirements |
|---|---|---|
| Heel binding force | GB/T 11413 | ≥700N |
| Tie pull-out force | HG/T 2877 | Foamed plastic≥52N |
| Tensile force of baby shoes accessories | GB/T 6675 | ≥70N |
Implementation points and case analysis
Typical unqualified cases
A batch of injection molded sandals was judged as Class B unqualified because the pull-out force of the upper strap was only 45N (the standard requirement is ≥52N). The root cause was improper control of the injection molding temperature, which led to the breakage of the molecular chain.
Suggestions on the connection between the old and new standards
- The original SN/T 0790-1999 EVA beach shoes inspection needs to add shank stiffness test (QB/T 1813)
- The original SN/T 0947-2000 plastic children's shoes need to supplement small accessory torque test (GB/T 6675)
Suggestions on inspection process optimization
- Establish a graded inspection system: full inspection of Class A items (safety performance), periodic inspection of Class B items (physical properties)
- Introduce X-ray fluorescence spectrometer to achieve rapid screening of heavy metals
- Develop a special pull-out force fixture to improve testing efficiency
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