Anti-static finishing of protective clothing and its finishing technology

Functional textiles will be the growth point of the international market. With the advancement of science and technology and the improvement of the quality of life, consumers’ requirements for textiles and clothing are not limited to fashion. They have increasingly higher requirements for the functionality and comfort of textiles. They hope that textiles and clothing have special functional effects, such as antibacterial, Anti-microbial, iron-free, thermal insulation, etc., and have evolved from single-function finishing such as anti-bacterial and anti-wrinkle to multi-functional finishing to increase the added value of fabrics. Safety protection textiles are an important part of functional textiles, among which anti-static fabrics are also an important category of current protective clothing fabrics.

Anti-static textiles for safety protection

Safety protection has received more and more attention from society, and has become an important guarantee for safe production and rescue operations. The development trend of safety and protective textiles: focus on the development of multiple fiber optimal blending technologies and the development of high-tech fiber fabrics. Classification of protective clothing: general protective clothing, physical protective clothing, chemical protective clothing, anti-static clothing, high-voltage electrostatic protective clothing, and live work shielding clothing belong to the category of physical protective clothing.

Anti-static clothing and anti-static textile quality standards

1. Quality standards for anti-static clothing

The original standard for anti-static clothing is: GB 12014-1989 “Anti-static Work Clothing”; the new standard is: GB 12014-2009 “Anti-static Clothing”

2. Comparison of quality standards for anti-static clothing

Comparison of physical and chemical performance technical requirements:

Table 1Original standard GB12014-1989

	Breaking strength/N
	Thick material	Thin material
Radial	≥780	≥490
Latitude	≥390

Table 2 New standard GB12014-1989-2009

	Technical requirements
Formaldehyde content/(mg/kg)	Direct contact with skin ≤75	Non-direct contact with skin≤300
pH value	4.0～9.O
Dimensional change rate/%	+2. 5～-2.5 (longitude and latitude)
Air permeability/(mm/s)	10～30 (coated fabric)	>30
Color fastness to water/grade (discoloration, staining)	≥3-4
Color fastness to dry rubbing/grade (discoloration, staining)	≥3-4
Light fastness/grade (discoloration, staining)	≥3-4
Breaking strength/N	Meridian ≥780 (mass per unit area ≥200g/m²) Meridian ≥490 (mass per unit area <200g/m2)		Latitude≥390

Table 3 Original standardGB12014-1989

	Grade A	Class B	Test methods
Amount of charged charge	<0.6µc/item		Test according to the method specified in Appendix A (Supplement) of this standard
Washing resistance	≥33.Oh	≥16.5h	Wash according to the method specified in Appendix B (Supplement) of this standard

Anti-static clothing classification

Level	Point-to-point resistance	The electrical charge of clothing
A	105 <R≤10／	Q≤0.2µc
B	1057<R≤1011	0. 2µc <Q≤O. 6µc
Test environment	(20+5)℃, (35+5)%RH	(20+5)℃, (35+5)%RH

From the above standards, it can be seen that the number of protective textile testing items corresponding to the new standards has increased, and the assessment indicators have become more stringent.