st · st technical textiles ¾term is widely used ¾definition is difficult ¾products are used for...
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Partner to the
Textile Industry
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•Revolutionised weaving technology •Approx. 250’000 machines installed world wide
•Specialised in production of technical fabrics
Facts
ST INDUSTRIAL FABRICS
Conveyor belts
PP/PE
fabrics
Tyre cord
Awnings
Geotextiles
Airbags
Bolting cloth
Sailcloth
Protective
clothing
Fabrics for coating
Industrial Fabrics Industrial Fabrics
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Technical textiles
Term is widely used
Definition is difficult
Products are used for technical performance
Specialised functions
Specific functions (tyre cord)
Strict specifications
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Technical textiles
Growth is phenomenal in last two decades
Enhance strength and performance (tyre cord)
Added functional properties
Used as accessories in processes to manufacture other products
Used by non-textile industry
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High tech applications
All have a role to play
Architects, engineers, builders, industrial designers
Communication of requirements
Discipline
Clear specifications
Awareness
Economic implications
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High tech applications
Incentive Potential market / Global market
Real growth / profit
New lease for textile industry
Replacing conventional materials at low cost
Environment friendly
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High tech applications
Automobile Aviation Defence
Civil engineering Chemical Medical
Pharmaceutical Printing
Etc.
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Applications of Geotextiles
Road constructions
Road repairs
Supporting walls
Railway tracks
Runways
Drainage
Coastal defence
ST Projectile Weaving Machine
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Customized Weaving Technology
Special executions for: – Agrotextiles – Geotextiles – Automobile textiles – Industrial filters – Tarpaulin and heavy fabrics – Wire fabrics – up to 846cm (333 inches)
9098 0245
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P7M S 846 N4 SP D12
Filter fabrics
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On loom coating device
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On loom coating device
ST Weaving from creel
ST Road construction
ST Road construction
ST Road construction
ST Road construction
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ST Road repair
9098 0186
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too soft to walk on
but
too sticky to swim in
Motorway in Germany
ST Road construction BREAKING STRENGTH AND ELONGATION DIAGRAM
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Geogrid specification Geotextiles nonwoven PES
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Weight of fabric g/m2
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ile s
treng
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Geotextiles woven PES
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Weight of fabric g/m2
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ile s
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Woven or non-woven Geotextile?
Woven fabrics - Advantage tensile strength much higher - low weight - fibres oriented in warp and weft direction
Non-woven - fibres are not oriented - much higher weight - disadvantage in tensile strength / elongation
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Geogrid specification Geogrid in High Tenacity PES Warp: PES dtex 2200
Weft: PES dtex 4400
Ends/inch: 7.7 ends / “ ( 3.03ends/cm ) Picks/inch: 7.7 ends / “ ( 3.03ends/cm )
Reed width: 210.76 inches ( 535.35 cm ) Pattern : leno Weight : 170 g/ sqm
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Traditional methods Staged construction - embankment is build in stages - slow process up to 10 years Removing weak soil - large volume of excavation and fill / very expensive Natural vegetation reinforcement - re-enforcement by layers of willow matting or bamboo - not capable to sustain high loads Building flat slops - uses up vast areas of land / large quantities of fill
ST Cost comparison Length of building site :~ 1000 m
Width of street embankment
- at building stage :~ 40 m - at finished stage :~ 20 m
Height of street embankment - at building stage :~ 4,50 m - at finished stage :~ 1,00 m
Required mass of sand :~ 80'000 m3
Required amount of geotextile :~ 26'000 m2
ST Cost comparison
9098 0052
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Application on Highway
9098 048
ST Cost comparison Without Geotextile With Geotextile Soil removing 85'000 m3
Required mass 90'000 m3 80'000 m3 of sand Settling time of 4 years 2 years embankment Total period of build 5 years 3 years Advantage / time saving 40 %
ST Cost comparison Without Geotextile With Geotextile Soil removing 540’000 USD 0 Heap up of 1‘220'000 USD 1‘080'000 USD embankment Cost for geotextile 300'000 USD --------------------------------------------------------------------------- Total 1‘760'000 USD 1‘380'000 USD =========================================== Advantage / cost saving 21 % Actual savings 380’000 USD
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Application on Highway
ST Cost comparison
Harmless to environment because of - smaller requirement of sand : ~ 10'000 m3
- no need for replacement of : ~ 85'000 m3 nonsupportiv soil - no need for storage space : ~ 4 ha for dig outs (10 acres)
- no recultivation of storage space
- no agricultural loss because of : 8 - 10 years storage space
ST Rail Road Track
ST Runway construction
ST Hydraulic engineering
ST Retaining structures
ST Retaining structures Short construction time Steeper slopes - up to 90 degrees Higher slopes - up to 20 metres (60 feet) No special equipment needed Natural appearance Cost savings - depends on soil type and wall height
ST Retaining structures
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ST Agrotextiles
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YOU decide where
YOU will go