GA 2109-2023
Police hat, dress hat (English Version)

Standard No.

GA 2109-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Public Safety Standards

Latest

GA 2109-2023

Introduction

Analysis of standard framework

Technical module	Core requirements	Test method	Reference standard
Style specification	Brim arc length ≤58cm, hat wall height 7.5±0.3cm	3D scanning comparison	GB/T 8628
Material quality	Feather yarn hair content ≥45%, formaldehyde ≤75mg/kg	Gas chromatography	GB/T 2912.1
Process requirements	Seam density ≥12 stitches/3cm, seam strength ≥98N	Tensile tester	GB/T 3923.1

---

Key technical requirements

4.1 Standard sample management

The standard stipulates the use of a digital standard sample system and requires manufacturers to establish a three-dimensional digital file. The deviation of the cap body surface shall not exceed ±1.5mm.

4.3 Dimensional tolerance

• Hat brim circumference: 58-62cm (divided into 5 sizes)
• Brim tilt: 15°±1°
• Cap badge positioning: center line deviation ≤2mm

---

Innovation in detection methods

Clause 5.4 introduces infrared spectroscopy to detect material composition, which is 300% more efficient than traditional chemical analysis methods and achieved 100% accuracy in random inspections at the 2022 Beijing Police Expo.

---

Implementation Suggestions

1. Production end: Establish a digital twin quality control system to realize real-time calibration of process parameters
2. Detection end: Configure a xenon lamp aging box that complies with GB/T 8427-2019
3. User end: The storage environment should maintain a temperature of 20±5℃ and a humidity of 50±10%

---

Standard Evolution Analysis

Compared with the 2008 version of the standard, the main changes in the new version are:

• New PVC synthetic leather environmental performance indicators (Appendix G)
• Introduction of GA 2111 worsted fabric anti-ultraviolet requirements
• The elastic modulus of windbreaks is increased from ≥80% to ≥85%

GA 2109-2023 Referenced Document

• GA 2111 Police uniform material: combed polyester wool
• GA 740 Material for police uniform.Woven fusible interlinings
• GB/T 12490 Textiles.Tests for colour fastness.Colour fastness to domestic and commercial laundering
• GB/T 191 Packaging.Pictorial marking for handling of goods
• GB/T 250 Textiles.Tests for colour fastness.Grey scale for assessing change in colour
• GB/T 2912.1 Determination of formaldehyde in textiles
• GB/T 3920 Fabric colorfastness test rubbing colorfastness*， 2024-12-31 Update
• GB/T 3921 Textiles.Tests for colour fastness.Colour fastness to washing with soap or soap and soda
• GB/T 3922 Textiles.Tests for colour fastness.Colour fastness to perspiration
• GB/T 3923.1 Textiles.Tensile properties of fabrics.Part 1:Determination of maximum force and elongation at maximum force using the strip method
• GB/T 4668 Textiles--Woven fabrics--Determination of number of threads per unit length
• GB/T 4669 Textiles.Woven fabrics.Determination of mass per unit length and mass per unit area
• GB/T 6152 Textiles--Tests for colour fastness--Colour fastness to hot pressing
• GB/T 6343 Cellular plastics and rubbers.Determination of apparent density
• GB/T 6543 Single Wall Corrugated Boxes and Double Wall Corrugated Boxes for Transportation Packaging*， 2025-05-30 Update
• GB/T 6836 Sewing thread
• GB/T 7573 Determination of pH value of aqueous extracts of textiles*， 2025-02-28 Update
• GB/T 8427 Textiles－Tests for color fastness－Color fastness to artificial light：Xenon arc
• GB/T 8630 Textiles.Determination of dimensional change in washing and drying
• QB/T 2537 Leather color fastness test reciprocating rubbing color fastness
• QB/T 2710 Physical and mechanical testing of leather Determination of tensile strength and elongation
• QB/T 3826 Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products.Neutral salt spraying test (NSS)

GA 2109-2023 history

• 2023 GA 2109-2023 Police hat, dress hat

Standard and Specification