FIBRE CHARACTERISTICS

Tow Strap

The variety of characteristics that define a particular narrow fabric are numerous. Material (yarn), construction, width, thickness, weight, strength, elongation, flexibility, flat surface abrasion resistance, and selvedge edge construction are all factors that contribute to defining a particular webbing.

Each webbing material has its own performance characteristics and end uses.

Cost Factor: Polypropylene is the lowest cost material available for webbings. Nylon and polyester materials are more expensive than polypropylene. While natural cotton can be inexpensive, dyed cotton can be expensive.

Colour: Finished nylon webbing is easy to dye, however, its colourfastness is not as good as dope-dyed nylon. Polypropylene webbing is pre-coloured (dope-dyed) and is colourfast.

Strength: Polypropylene, nylon and polyester fibres are stronger than cotton. High-tenacity DURALENE® polypropylene yarn is also available.

Abrasion Resistance: Nylon provides the highest resistance to abrasion, and polypropylene has the second highest resistance to abrasion.

Chemical Resistance: Polypropylene has a wider range of chemical resistance than the other fibres.

 

Polypropylene Webbing

KWC uses DURALENE® polypropylene yarns and can therefore offer control of critical properties of your polypropylene webbing. Duralene polypropylene yarns can be incorporated with special additives, which can make the end product sunlight resistant, flame resistant, bacteria resistant, or heat stabilized. We have the flexibility to produce webbing in limitless colours – including one of the largest offerings of standard colours. The yarn can be produced with UV inhibitors and higher than normal tenacity so that our webbing is strong and remains strong after many years of use.

Good bulk and cover, very lightweight

High strength (wet or dry), abrasion resistant (durable)

Resistant to deterioration from mildew, bacteria, perspiration, rot and moisture

Outstanding resistance to chemicals

Very low moisture absorption (0.05%)

Stain and soil resistant, pill resistant, odour resistant

Good washability, quick drying, unique wicking

Sunlight resistant (with UV additive), colourfast

Resilient, very comfortable

Low static, low thermal conductivity

Non-allergenic

Lower cost

 

Cotton Webbing

Cotton offers unique advantages because of its natural looks and texture, matte finish, water absorption abilities, and low static electricity. Cotton webbing has widespread use in garment industry applications. However, for technical applications, cotton cannot match the performance characteristics of synthetics.

Good strength, low elasticity and stretch

Poor resistance to deterioration from mildew, bacteria, perspiration, rot and moisture

Poor resistance to most chemicals

Highly absorbent (8.5%), requires preshrinking

Low stain resistance

Machine-washable, dry-cleanable, launders well

Easy to dye, good color retention, prints well

Soft hand, comfortable, easy to handle and sew

 

Nylon Webbing

Heavier than polypropylene, less bulk and cover, higher cost

High strength, highest abrasion resistance

Higher temperature resistance, high melting point (220-250 C.)

Resistant to deterioration from mildew, bacteria, perspiration, rot and moisture

Weak resistance to acids, inert to alkalis

4.5% moisture absorption

Lower stain resistance (poor resistance against water-based stains)

Good sunlight resistance (with UV additive)

Normally dyed nylon is not as color fast as dope-dyed nylon.

 

Polyester Webbing

High strength, good abrasion resistance

High melting point (230-240 C.)

Resistant to deterioration from mildew, bacteria, perspiration, rot and moisture

Fair resistance to acids and alkalis at room temperature

Low moisture absorption (0.40%), quick drying

Better resistance against water-based stains, poor resistance to oil stains

Good sunlight resistance

Higher cost for dyed yarns

chart