Technical Services Antimicrobial Fabric Silver Content Testing

Due to the attack of Delta virus, the topic of antiviral and antibacterial has returned to the public's attention, and the "clothing" in the "clothing, food, housing and transportation" occupies a vital part of people's lives, and the antibacterial and antibacterial fabrics in textiles have risen steeply. achieve antibacterial antibacterial?

Introduction of common antimicrobial agents

Generally, antimicrobial agents are chemicals that can keep the growth or reproduction of certain microorganisms (bacteria) below the necessary level for a certain period of time. Antimicrobial agent according to its composition is divided into natural antimicrobial agent , inorganic antimicrobial agent and organic antimicrobial agent three, inorganic antimicrobial agent relative to the other two types of antimicrobial agent has strong antibacterial ability, wide range of antibacterial, long validity, light does not age, odorless does not change color and other outstanding advantages.

Commonly used to do antibacterial inorganic substances are mainly zeolite, apatite, zirconium phosphate, zinc oxide and other porous substances and silver, mercury, lead, copper, nickel, titanium, cadmium and other metals and their ionic compounds, and silver ions are favored by the majority of consumers.

Silver is how to do antibacterial sterilization?

The reason why silver can sterilize without harming beneficial bacteria and normal cells is that most pathogenic bacteria are single-celled microorganisms that rely on proteases to maintain metabolism and reproduce to affect normal cells, there is an oxygen metabolizing enzyme in these proteases, when silver encounters this oxygen metabolizing enzyme, the oxygen metabolizing enzyme activity will steal an electron of silver, so that silver atoms become positively charged silver ions, silver ions will attract The silver ion will then attract the specific binding of the negatively charged thiol group (-SH) in the protease, effectively piercing the cell wall and cell membrane exterior, further making the bacterial cells unable to breathe, metabolize and reproduce due to protein denaturation until death, achieving the effect of sterilization.

In general, the survival time of pathogenic bacteria is only a few minutes, under the inability to reproduce, these pathogenic bacteria will die naturally, and these silver ions will return to the original electron reduction into silver atoms. So the presence of silver ions can achieve a continuous sterilization effect.

Textiles, leather, plastics, coatings and other materials are closely related to human life, companies to meet the market demand, have to adjust the product formula to add silver-containing additives to enhance the antibacterial performance of products.

Project Category

Item

Applicable products

RoHS 10 items

Lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, phthalate esters (DBP\BBP\DEHP\DIBP)

Electronic and electrical products

REACH SVHC

The latest candidate list of SVHC in REACH regulation 219 items

Chemicals exported to the EU

PAHs

PAHs 15 items

Electronic and electrical products exported to the EU, etc.

Halogen

Four halogens (fluorine, chlorine, bromine, iodine)

Electronic and electrical products exported to the EU, etc.

Heavy metals in toys

Migratable 8 heavy metals (selenium, mercury, lead, cadmium, chromium, barium, arsenic, antimony)

Children's toys (represented by clay)

Phthalates

DBP, BBP, DEHP, DNOP, DINP, DIDP

Children's toys (made of plastic)

VOC

Volatile Organic Compounds

Blue Sky Defense.

Adhesives, paints, inks, cleaning agents