Kind of rope Diameter

of test rope

Vinylon rope polyester rope nylon rope

Polyethylene rope polypropylene rope

12 ~ 24 mm

Wet condition(1)

Wet condition(3)

Dry condition(2)

Dry condition(2)

40 ~ 60 mm

Wet condition(1)

Wet condition(3)

Dry condition(2)

Dry condition(2)

NOTES:

(1) The test specimen is to be soaked in water at normal temper- ature for a period of 30 m inutes or more, then taken out and subjected to tensile test at room temperature.

(2) The test specimen in dry condition is to be subjected to tensile test at room temperature.

(3) The test specimen is to be soaked in warm water at temper- ature of 35 ± 2°C for a period of 30 m inutes or more, then

taken out and immediately subjected to tensile test at room temperature.

Test item

Test method

Acceptance criteria

Construction

& Diameter

Construction and diameter of synthetic fibre ropes are to be measured in accordance with Pt 4, Ch 8, Sec 6 of the Rule.

To comply with the Pt 4, Ch 8, Sec 6 of the Rule.

Tensile tests in

wet and dry conditions

(1) Tensile tests on three each test specimens are to, in prin- ciple, be carried out for each of the test conditions given in Table below and breaking strength and elongation are to be measured. For rope having diameter higher than 60mm, one additional tensile test specimen is to be taken from the rope of maximum diameter.

(2) The gauge length of the test specimen is to be 30 times or more of the rope diameter, however it needs not to ex- ceed 1 meter.

(1) Except on cases with vinylon and nylon in wet condition, respective breaking loads are to satisfy the requirements specified in Pt 4, Ch 8, Sec 6, of the Rules.

(2) The breaking loads of vinylon and nylon in wet conditions are to be 80 % or more and 90 % or more respectively of the values specified in above (1)

(3) Values with respect to elongation are to be for reference only.

Kind of rope

Residual abrasion strength ratio (%)

Vinylon rope

min. 50

Polyethylene rope

min. 55

Polyester rope

min. 55

Polypropylene rope

min. 55

Nylon rope

min. 55

Test item

Test method

Acceptance criteria

Abrasion resistance tensile test

(1) A total of six test specimens are to be taken from ropes with diameter from 12 to 24 mm. Three of them are to be set in the abrasion resistance testing machine with the following particulars, and are to be subjected to repeated strokes for 500 times.

 Stroke: 200~300 mm

 Abrasion speed: 50 strokes/min.

 Abrasion surface: Grinder with particle size No. 120

 Tensile load : 98 N

(2) Those three tested specimens together with other three non-tested specimens are to be placed in a thermostatic oven kept at a

temperature of 20 °C and a humidity of 65 %, and left there for one hour.

(3) They are then to be taken out, and be subjected to tensile tests for measuring the tensile strength and elongation, whereby the

strength values of the rope before and after abrasion are to be compared.

(4) For other test conditions than those shown above, they are to be considered appropriate by the Society.

The ratio of the residual abrasion strength to the strength without abra- sion (the residual abrasion strength ra- tio) is to satisfy the values given in table below.

Weather resistance test

(1) A total of six test specimens are to be taken from ropes with diameter from 12 to 24 mm. Three of these test specimens are to be placed in the weather resistance test machine controlled to the following conditions where they are to be left for 200 hours or more.

 Weathering light : Sunshine carbon arc light or ultraviolet carbon arc light (KS F 2274 (Recommended Practice for Accelerated Artificial Exposure of Plastics Building

Materials))

 Temperature of black panel : 63 ± 1 °C

 Period of water spray : 18 min/2 hours

(2) The six test specimens including those three non tested speci- mens are then to be placed in a thermostatic oven kept at a

temperature of 20 °C and a humidity of 65 %, and left there for one hour. These test specimens are to be taken out, tensile strength and elongation are to be measured, and the strength af- ter the weathering resistance test and that of the test specimens not subjected to such weathering resistance test are to be compared.

The ratio of the former to the latter (the residual weathering strength ratio) is to satisfy the values given in table below.

Kind of rope

Residual weathering strength ratio (%)

Vinylon rope

min. 90

Polyethylene rope

min. 80

Polyester rope

min. 90

Polypropylene rope

min. 80

Nylon rope

min. 80

Test item

Test method

Acceptance criteria

Linear strength and elongation tests

(1) The test procedures of filament and split are to be in accordance with KS K 0412, and those of span are to be correspondingly on accordance with KS K 0475 (Testing Method for Tensile Strength of Spun Yarns).

(2) The number of test specimens used in the test is to be 10 and average value of the linear strength and elongation on these test specimens are to be

obtained.

The average value of lin- ear strength and elonga- tion obtained are to com- ply with the requirements given in Table 2.12.3.

Chemical re- sistance test

(1) The chemical resistance tests are to comprise alkali-resistance test and acid-re- sistance test.

(2) In alkali-resistance test, the test specimen is to be socked in 10% caustic so- da solution at a temperature 20±2°C for a period of 24 hours, whereas in

acid-resistance test, the test specimen is to be socked in 10% acid solution at

a temperature 20±2°C for a period of 24 hours, and then rinsed with water,

and the linear strength is to be measured by the same method as in (1)

above.

(3) The number of test specimens are to be 10 for each chemical solution. The linear strength is to be converted into the value of residual strength ratio of chemical resistance by following equation.

linear strength(g) after chemical processing

Residual chemical resistance strength ratio = --------------------------------------------------------- × 100(%)

linear strength(g) before chemical processing

These average values are to satisfy the values giv- en in Table 2.12.3.

Kind of raw textiles

Mechanical properties

Residual chemical resistance strength ratio(%)

Linear strength(g/D)

Linear elongation (%)

10% sulphuric acid

10% caustic soda

Vinylon

for Grade 1

Span, mono- filament

4.0 min.

9 ~ 18

90 min.

90 min.

for Grade 2

Multi-filament

6.0 min.

9 ~ 18

90 min.

90 min.

Polyethyl ene

for Grade 1

Mono-filament

6.5 min.

5 ~ 25

90 min.

90 min.

for Grade 2

Mono-filament

8.5 min.

5 ~ 15

95 min.

95 min.

Polyester

Multi-filament

5.5 min.

10 ~ 20

90 min.

90 min.

Polyprop ylene

for Grade 1

Span

4.5 min.

10 ~ 20

90 min.

90 min.

Mono-filament

6.0 min.

10 ~ 20

90 min.

90 min.

for Grade 2

Multi-filament

6.5 min.

15 ~ 25

90 min.

90 min.

Special mono- filament

6.0 min.

5 ~ 15

90 min.

90 min.

Special multi-filament

5.5 min.

5 ~ 15

90 min.

90 min.

Split

4.0 min.

5 ~ 15

90 min.

90 min.

Nylon

Multi-filament

6.5 min.

15 ~ 30

80 min.

80 min.

NOTE:

g/D signifies gram/denier