Projob Work Wear - FR High Visibility Jacket and Trouser Technical


Projob logoThis section discusses the FR properties of the fibres used in the construction of our Projob High Visibility Jacket and Trouser range, noting:

Flame resistance has a direct correlation to the Limiting Oxygen Index of the fibre(s) used in a textile's composition. The Limiting Oxygen Index is a measurement, expressed as a percentage, of the minimum concentration of oxygen needed in air to support combustion of the fibre. Since atmospheric air contains an oxygen concentration of 20.95%, fibres with a greater value Limiting Oxygen Index can be considered non-flammable or flame resistant, although it is acknowledged that a Limiting Oxygen Index ≥ 26 provides for the safest level of protection. The Limiting Oxygen Index of 100% Protex® Modacrylic is approximately 32 and since the fibre does not ignite in air, burn, melt or form molten droplets, human skin is much safer when next to the fibre.

You can read more about the FR properties of Protex® Modacrylic and the protection properties of Anti-static Control fibre in the following sections.

Protex® Modacrylic

Kanecaron/Protex is the registered brand name for modacrylic fibres produced by Kaneka Corporation. Protex® Modacrylic is the advanced FR fibre in the Kanecaron* family. Based on the original characteristic of Kanecaron, both FR and heat resistance is improved which allows blends with other FR fibres, such as Cotton or Wool, while retaining an exceptionally high level of FR performance. Protex® Modacrylic is one of the most popular fibres used for PPC in Europe and can be found in petrochemical, refining, electric utilities, welding, molten iron and steel splash and other high risk hazard industries where heat and flame hazards are ever present.

*Kanecaron is a performance fibre that has the characteristics of high flame retardancy in addition to the soft hand and dye ability, as is the nature of acrylic^ fibre. It is an inherently self-extinguishing FR fibre that imparts excellent flame retardant properties to fabrics and nonwovens in blends with other natural and synthetic fibres. There is no deterioration in flame retardancy after either repeated washing or normal use over time.

^Acrylic fibres are a synthetic fibre made from a polymer, polyacrylonitrile, with an average molecular weight of ~100,000, about 1900 monomer units. Polyacrylonitrile (PAN) is a synthetic resin prepared by the polymerisation of acrylonitrile. A member of the important family of acrylic resins, it is a hard, rigid thermoplastic material that is resistant to most solvents and chemicals, slow to burn and of low permeability to gases. Most polyacrylonitrile is produced as acrylic and modacrylic fibre, a common substitute for Wool in clothing and home furnishings. To be called acrylic, the polymer must contain at least 85% acrylonitrile monomer. Protex® Modacrylic is a modified acrylic with permanent flame retardant qualities.  

How Modacrylic Protex® Protects

Projob Work Wear Features

Pro Tec™ are the materials that afford effective protection against exterior effects. They are very resistant to wear and to tearing. Pro Tec™ is suited to extremely strenuous work in rough environments.

Pro Thermal™ are the materials that afford effective insulation against both heat and cold. The materials detect and dispose of surplus heat at the same time that they keep out unneeded cold. Pro Thermal™ keeps body temperature at an even and pleasant level all day.

Projob Work Wear Material Partners



The YKK Group is trusted worldwide for their impeccable production standards and thorough quality control processes for slide fasteners, hook and loop fasteners, webbing tapes and plastic hardware. YKK has integrated production and supply systems in place that meet all of the needs of customers worldwide.

3M Scotchlite



3M™ Scotchlite™ personal reflective materials make you extra visible when it’s dark and the view is bad. The material reflects bright white when lit up by vehicle headlights and also when the wearer is stationary beside the road. 3M™ Scotchlite™ reflective materials for protective garments exceed the highest reflective category of the European standards for reflective protective garments, EN 471, as well as all strict, standardised tests.


Coats Epic is a high tech core spun thread that combines a high tenacity polyester filament core with a polyester fibre wrap to make a versatile and reliable thread. Coats Epic is ideal for delicate garments as well as jeans and work wear. Epic’s specially formulated lubricant delivers excellent sewing performance at low tension under the most demanding of conditions. The combination makes for a thread with maximal tensile strength, which results in seams with extreme durability.


Duraflex is the trade mark of the high-quality buckles, belts and carrying systems used in the construction of Projob Work Wear.

Electrostatic Discharge (ESD and the use of Anti-static Control Fibre)

The unintended consequences of static discharge can cause serious problems in a number of environments. Explosions in grain storage facilities often are cited as one of the most graphic examples. However, static discharge also can damage products in electronic assembly; prevent production machinery from operating properly and create a number of quality, health and safety concerns in the work environment. Refineries, medical operating rooms, pharmaceutical manufacturers, paint spraying and powder coating operations, electronics manufacturers, clean rooms and military operations are just some of the places where static-control textiles have served market demand.

In the automotive industry, product applications include seatbelts and upholstery. Bulk bags, anti-static brushes and conveyors and paper-forming belts make manufacturing safer and more efficient. Anti-static brushes inside printers are widely used hidden components. The commercial environment has benefited from using anti-static engineered commercial upholstery and flooring products and the list goes on.

There are a number of solutions to creating fabric formations that control static discharge. Aside from anti-static finishes, various inherent fibre and yarn configurations offering conductive characteristics may also provide benefits in knits, wovens and nonwovens. By incorporating conductive materials into the constructions, the fabrics safely collect and dissipate the static charge. Traditionally, man-made fibres have been combined with conductive materials to provide the necessary dissipation. These fibres are then incorporated into the fabric construction - in some cases woven in a simple check or stripe to produce ample conductivity. In other cases, as little as 1 to 2% inclusion of conductive fibre can provide enough dissipation to meet the market specification. For example, Dupont™ Nomex® IIIA, one of the world’s leading and most recognised FR fabric, contains no more than 2% anti-static dissipative (P-140) fibre.

Conductive materials typically include either silver or carbon. They are doped, coated or extruded in varying cross sections to achieve the level of conductivity in a polymer that meets end use requirements.

Anti-static applications continue to grow even though the battle to control Electrostatic Discharge is not new. Applications including nonwoven constructions used for dry filtration and conductive papers and even the consumer demands for technical-oriented apparel could present opportunities. Knit, woven and nonwoven fabric constructions offer opportunities to combine varying fabric performance and cost levels with the added value of anti-static performance.

The inherent Modacrylic solution is fully described in the Protex® Modacrylic catalogue.