TARPAULINS: TYPES AND INDUSTRIAL APPLICATIONS

Prof. R.B.CHAVAN

Former Professor, IIT Delhi

Consultant

MGIRI, Wardha

Subject Content

• DEFINITION

• FIBRES USED

• INDUSTRIAL TARPAULINS

• FINISHING TREATMENTS

• TEST EQUIPMENTS

• APPLICATIONS

DEFINITION

COMBINATION OF WORDS

TAR: TARRED CANVAS

PALLING: FABRIC USED

TO COVER OBJECTS ON SHIP

ALSO CALLED TARP

FEATURESTHICK CANVAS FABRIC SHEET OF COTTON, COTTON/PET, SYNTHETIC FIBRE FABRIC

PET, NYLON, PVC, PE, PP

TARPS OFTEN HAVE REINFORCED EYELETS AT THE CORNERS AND ALONG THE SIDES TO FORM ATTACHMENT POINTS FOR ROPE , ALLOWING THEM TO BE TIED DOWN OR SUSPENDED.

WATER RESISTANT, FIRE PROOF, ROT RESISTANTUV PROTECTION

A) DESIRABLE PROPERTIES ACHIEVED BYSUITABLE COATING: PVC, OTHER HYDROPHOBIC RESINS LIKE PE, PP ETC. ON SYNTHITIC FIBRE FABRICS B) FINISH APPLICATION

USUALLY PAD-DRY-CURE TECHNIQUE MAIN APPLICATION FOR COTTON AND COTTON/PET BLENDED TARPAULINS.

CLASSIFICATION OF TECHNICAL TEXTILE

the range of technical textiles

is very large. In the present article it is

proposed to discuss a few aspects of the

technical textiles or the industrial fabrics falling in the category of

tarpaulins.

APPLICATIONS AREAS

Industries / Sectors

APPLICATIONS

Agriculture

Food grain covers

Irrigation

under lays for fertilizers, sugar, tea, coffee and other products.

low cost huts,

storage bins,

mulching,

fumigation covers/tents,

green houses,

mushroom cultivation and other areas.

Lining of canals, watercourses, in order to stop seepage losses

Industries / Sectors

APPLICATIONS

Fisheries Lining of fish ponds/reservoirs

Civil Construction Work:

Water proofing/damp proofing of all types of roofs, flooring and under ground structures and construction site dwellings/materials storage tents.

Misc. Silkworm trays, lining of industrial tanks, , machinery wrapping, heavy duty sacks

Defence

Sports:

Covers for football Underlay for runway, tents, ammunition dumps, bunker -lining, tank and gun grounds, cricket pitches,tennis courts, tracks pools.

Household: Underlay for carpets, table covers, scooter covers, etc.

TENSILE STRENGTH TESTER IMPACT TESTER

MFI TESTER LEAK DETECTION TESTER

QA THROUGH TESTING

CHEMICAL ANALYSERENVIRONMENT CRACK TESTER

DENSITY TESTER

OPACITY TESTER CARBON BLACK CONTENT TESTER CARBON BLACK DISPERSION TESTER

GLOSS METER HAZE METER

COEFFICIENT OF FRICTION TESTER

PIN HOLE DETECTOR

Cotton

Cotton/PET blends

Polyester

Nylon

HDPE/LDPE

PP

PVC

Fibres used

FINISHING TREATMENTS

DESIRABLE PROPERTIES

• WATER RESISTANCE

• FIRE RESISTANCE

• MICROBIAL RESISTANCE

• UV PROTECTION • FINISHING METHODS:

BREATHABLE

• TOPICAL FINISH: COTTON, COTTON/PET

NON-BREATHABLE

• COATING: NYLON, PET

• LAMINATION: PE, PP

COTTON AND COTTON/PET TARPAULINS

SPECIFICATIONS

COTTONComposition Cotton 100% Weave Plain

Weight Oz/sq yd 7.4-15gm/sq m 251-610

Breaking strain (N/50mm)

Warp 980-2190Weft 590-1860

Tear strength (N) Warp 88-175Weft 60-110

COTTON/PET

Composition Polyester staple 52%Cotton 48%

Weight Oz/sq yd 8-18gm/sq m 203-610

Breaking strain (N/50mm)

Warp 1620-3390Weft 410-2715

Tear strength (N)

Warp 175-885Weft 105-665

Weave Plain/Rib-stop

TOPICAL FINISHES

WATER RESISTANCEFIRE RESISTANCE

MICROBIAL RESISTANCE UV RESISTANT

WATER RESISTANCE

1. Wax dispersions free of metal ions

2: Metallic salts and soaps

3: Wax dispersions containing Zirconium salts

4. Pyrdinium compounds.

5. Silicones

6: Flurochemicals

1-4 TEMPORARY FINISH

5-6 DURABLE FINISH

SEVERAL TRADE PRODUCTS ARE AVAILABLE

FLAME RETARDANT FINISH

1. HALOGENATED

BROMINATED FLAME RETARDANTS CHLORINATED FLAME RETARDANTS

2. ORGANO PHOSPHOROUS

PHOSPHATE ESTER SUCH AS TRI PHENYL PHOSPHATE

3. NITROGEN-CONTAINING FLAME RETARDANTS

4. INORGANIC FLAME RETARDANTS.

ANTIMICROBIAL FINISH

COMMERCIAL FINISHES

1. ROSSARI.S FABSHIELD

2. CIBA SPECIALITY CHEMICALS TINOSAN AM

3. CLARIANT SANITZE AG

UV PROTECTION

DERIVATIVES OF

O- HYDROXYL BENZOPHENONES,

O– HYDROXYPHENYLTRIAZES,

O –HYDROXY PHENYL HYDRAZINES.

PVC COATING OVER A BASE CLOTH OF NYLON OR POLYESTER. ROT-PROOF AND WATERPROOF, LESS SUSCEPTIBLE TO DAMAGE FROM ULTRA-VIOLET RAYS, I.E. SUNLIGHT,

WEATHER RESISTANCE

LIGHTWEIGHT THEY

IDEAL FOR COVERING TIMBER STOCK AND BUILDING MATERIALS,

THOUGH THEY ARE PRIMARILY USED FOR COVERING GENERAL PURPOSE GOODS IN ROAD TRANSPORT.

PVC TARPAULINS

SPECIFICATIONS

POLY TARPS

PE COATING ON NYLON OR PET FABRIC

PE FILM LAMINATION (BOTH SIDES) ON PE FABRIC

TWO TYPES

READYMADE OF DESIRED SIZE

POLYTARP ROLLS

BOTH TYPES REINFORCED WITH EYELETS

CHARACTERISTICS

• Strong and tear resistant.

• Flexible - poly tarp is basically a sheet of coated fabric.

• Water resistant or waterproof.

• Reinforced with eyelets as attachmnent points for rope

• U V protection

• Arctic flexibility - most poly tarps function well at freezing

temperatures.

• Mildew resistant

POLY TARPS ARE USUALLY THE LEAST EXPENSIVE TYPE OF TARPS AND MOST WIDELY USED.

LDPE OR HDPE FILMS ARE USED FOR BOTH SIDE LAMINATION OF PE FABRICS TO PRODUCE POLY TARP.

THE THICKNESS OF THE LAMINATION FILM VARIES FROM 40 MICRONS TO 1500 MICRONS

WIDTH FROM 1 M TO 13.5 M.

LAMINATION FILM FOR POLY TARP

Good tensile and tear strength

better optical clarity.

Dimensionally stable under varied climatic/temperature

conditions.

Tolerate temperatures variations ranging from -70°F to 165°F.

Offers excellent chemical resistance to Acids, Alkalies,

Fungi/Bacteria & Grease; do not corrode metals, is odourless

and tasteless.

LAMINATION FILM CHARACTERISTICS

CONTAINS NO PLASTICISER AND DO NOT BECOME BRITTLE WITH TIME AND USE.

RESISTANT TO ULTRA-VIOLET RAYS

LIGHT WEIGHT

EASY OF HANDLING & TRANSPORTATION.

WATER PROOF, DUE TO WHICH IT IS IMPERMEABLE TO LIQUIDS AND IS UNAFFECTED BY HUMIDITY.