Glossary

EnkaRetain and Drain – a roofing solution for a developing environmental trend

Glossary

A

Agrotextiles

Textiles used in agriculture for applications such as crop protection, weed control and shading. Examples include Bonar Fabrics Phormium Screens and Groundcovers developed for various applications both under glass and outdoors.

B

Bi-component textile

Textile consisting of two different materials typically one which imparts strength and stability and another which imparts another characteristic such as bonding or resistance to heat or chemicals.

Biogas

Biogas is gas produced by the biological breakdown of organic material in the absence of oxygen. It is an important source of renewable energy and is produced and collected at biogas plants from biodegradable waste and energy crops. Biogas is highly volatile and explosive. Mehler Texnologies Valmex® enviro pro gas tanks are ideally suited to holding biogas due to their special fabric design which meets the demanding safety requirements.

Bobbin

A roll of Yarn.

Broadloom

Carpet woven on a wide loom, to reduce the number of seams.

C

Calendering

Pressing a textile between heated rollers to compress, bond, stabilise or set it.

Carpet backing

In tufted carpet manufacture (the most common method), the pile yarn is injected into the primary backing; to enhance dimensional stability a secondary backing is laminated to the back of the carpet.

Coated fabrics

Fabrics finished with a layer of polymer to impart specialist characteristics.

Composite materials

Materials comprising two or more separate materials which are combined to exploit their special chemical or physical properties.

Construction fibres

Micro fibres used in cement, screed, plasters and renders to strengthen, prevent cracking, protect against extremes of cold and heat, and resist explosive spalling.

Creel

A collection of Bobbins that feed yarn into a manufacturing process.

D

Drainage

The use of geosynthetics for the vertical or horizontal discharge of water or gas.

E

Explosive spalling

A very hazardous reaction of high density concrete to fire, where pressurised steam causes large fragments of superheated concrete to explode from the structure.

Extrusion

A manufacturing process where a polymer is pushed through a die to create an object of fixed cross-section.

F

Fabrics

A material consisting of a network of natural or artificial yarns or fibres.

Fibrillated yarn

Wide blades of yarn (so called “tapes”), which are perforated lengthways to create a strong structure.

Filament

A fibre of indefinite length, extruded from a spinneret.

Filtration

The use of a geotextile to allow the passage of fluids (most commonly water) while preventing the uncontrolled passage of soil particles.

Fleecing

A process for producing a fabric from filaments or staple fibres.

Flow medium

A product that assists infusion processes by accelerating the flow of resin or foam.

G

Geosynthetics

Composites and meshes used in geotechnical applications for erosion control, drainage, soil reinforcement and consolidation.

Geotextiles

Fabrics used in geotechnical engineering for separation, filtration and reinforcement.

Grass Yarns

Yarns manufactured for artificial grass. Can be monofilament, fibrillated or hybrid.

Green roofs

Building roof partially or completely covered with vegetation. Modern green roofs consist of textile layers placed over the roofs to support a growing medium and vegetation. Can help control stormwater runoff, reducing pressure on drainage systems; reduce heat extremes in towns; assist building insulation; and provide a habitat for plants, animals and insects.

Groundcover (horticulture)

A fabric designed to shade horticultural land or to inhibit weed production.

H

High density concrete

High grade concrete used for its strength in high rise buildings and tunnels.

Hybrid yarns

A yarn manufactured in a similar way to a fibrillated yarn but processed to give the appearance of a monofilament yarn.

J

Jute

A type of natural fibre.

K

Knit de knit

A finish which gives the yarn a curly appearance, producing a non-directional surface by eliminating the effect of pile direction.

Knitting

The process by which yarns are interlooped into a textile.

L

Lacquer

A varnish that dries by solvent evaporation and/or a curing process to provide a particular finish on a material.

Loom

A loom is a machine for weaving yarn into textiles.

M

Monofilament yarns

A yarn consisting of uniform single slim filaments created separately rather than split from a broader extruded film.

N

Needle punched

Mechanically bonded non-woven produced by punching layers of material with barbed needles to entangle the fibres together.

Non-woven

Textile in which filaments or fibres are randomly orientated and bonded by chemical, mechanical or thermal means, excluding products which are woven or knitted.

Nylon

A category of polymer also known as Polyamide.

P

PA6

A common type of polyamide (nylon) polymer; durable and resistant to abrasion.

Performance materials

Materials enhanced to have desirable physical or chemical characteristics.

Pile

The raised surface of a pile fabric, which is made of upright loops or strands of yarn, connected to a carrier.

Pile depth

The length (or depth) of yarn strands or loops in a pile fabric.

Pile weave

A textile created by weaving where the warp fibre is raised into loops, which may be left as loops (loop or uncut pile) or cut (cut pile).

Plastic

A generic term for a synthetic organic material, typically a solid (at room temperature) polymer that may be cast, extruded or moulded to create a large range of finished products.

Polyamide (PA)

A category of polymer, also known as nylon.

Polyester

A category of polymer, which includes Polyethylene terephthalate (PET).

Polyethylene (Polythene, PE)

A thermoplastic polymer, the most extensively manufactured polymer in the world.

Polyethylene terephthalate (PET)

Polyethylene terephthalate, a thermoplastic polyester. Strong and lightweight, used extensively in food and drink packaging and synthetic fibres. Third most extensively manufactured polymer.

Polymerisation

The process by which polymers are formed, combining molecules (monomers) into a chain.

Polymers

Complex chemical compounds consisting of molecule chains with specific physical and/or chemical characteristics for a wide range of applications.

Polypropylene (PP)

A thermoplastic polymer, the second most extensively manufactured polymer in the world. Its rugged and hardwearing properties make it suitable for a wide variety of applications, including packaging, textiles and automotive components.

Polyurethane (PU)

A type of polymer that may be formulated in a wide range of densities from flexible foam, used in upholstery, to hard plastics used in structural parts.

Polyvinyl Chloride (PVC)

A thermoplastic polymer, used extensively in construction and made softer by the addition of plasticisers, in clothing, inflatable structures, flexible hoses and electrical insulation.

Primary backing

In tufted carpet manufacture, the pile yarn is injected into the primary backing, which is providing strength and stability for the finished product,

Protection

The use of a geosynthetic material as a stress reduction layer to prevent or reduce damage to an adjacent surface or layer. Needlepunched non-woven geotextiles for example are used for membrane protection in landfill and reservoirs.

R

Reinforcement

The use of the tensile properties of a geosynthetic material to resist stresses or contain deformation in soil structures.

Roofing membranes

Rubber, bitumen or thermoplastic coatings used on flat roofs to prevent water leaks and move water from the roof.

Runnage

The length of a kilogram of yarn, which determines the yarn thickness and hence tenacity.

S

Screed

A mixture of sand and cement laid over a concrete base to provide a surface, onto which flooring materials are laid.

Secondary backing

Fabric laminated to the back of the tufted carpet to enhance dimensional stability.

Secondary backing

The use of a geotextile to prevent the intermixing of dissimilar soil layers. Woven geotextiles are an example of a separation geotextiles.

Spinneret

A specialised extrusion device through which fluid polymers are forced to form filaments.

Spinning

The process by which fibres are twisted together to create yarn. Also a specialised extrusion process where fluid polymer is forced through a spinneret to form filaments.

Spun-bond

A non-woven which has been spun-laid then bonded by thermal, mechanical or chemical means.

Spun-laid

A non-woven produced by a continuous manufacturing process where fibres are spun then directly dispersed onto a belt, before being bonded by heat, chemical or mechanical treatment.

T

Technical textiles

A technical textile is a textile product manufactured for non-aesthetic purposes, where function is the primary criterion.

Tenacity

The measure of the strength of a fibre or yarn

Textile

Collective term for fabrics, yarns and fibres.

Texturised grass yarn

A heat finish which introduces a kink into the grass yarn, similar in effect to Knit de knit.

Thermal bonded

Materials bound together by heat, which causes its constituting filaments or fibres to adhere to each other at the contact points.

Thermoplastic

A polymer that turns into a liquid when heated.

Thermoset

A liquid polymer that may be irreversibly set into a solid by heating or irradiation.

Three-dimensional polymeric mats

Polymeric monofilament matrices of different polymers, thicknesses, weights, colours and structures.

Tufting

A carpet manufacturing process where a yarn is stitched through a backing fabric and optionally cut to create a tuft.

Twist

A measure of how tightly yarn is twisted. In carpet manufacturing, the higher the twist, the better the texture retention and resilience.

Twist retention

A measure of how well a twisted yarn retains its twist.

W

Warp

The warp fibre is fixed in parallel rows on a loom before the weft fibre is woven between it to form a textile.

Weaving

The process by which yarns are interlaced into a textile.

Weft

The weft fibre is woven over and under the fixed parallel rows of warp fibre on a loom to form a fabric.

Woven

Textile produced by weaving, which is the interlacing of two yarns, known as the warp and the weft.

Y

Yarns

Long strands of textile fibres, produced by spinning, suitable for creating a fabric by weaving, knitting or other means.