Self adhesive tapes. Measurement of breaking strength

Cotton fabric with excellent antibacterial properties was obtained by treated with polyamide-amine (PAMAM) dendrimers as a carrier and silver nitrate as an antibacterial agent. The antibacterial cotton fabrics were prepared by the methods of one-bath process and two-bath process. Antibacterial activity of cotton fabrics treated by two different methods was good, but the antibacterial durability of cotton fabric treated with two-bath process was better than that treated with one-bath process. After 50 washing cycles, cotton fabric treated with two-bath process still had good antibacterial property and its inhibitory rate to Gram-positive S. aureus and Gram-negative E. coli was over 99 %. It was found that the breaking strength retention of finished cotton fabrics was 85.83 % and the decrease of cotton fabrics’ whiteness index was about 15 %.

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Comments on: Breaking Strength of a Bundle of Fibers

Textile Research Journal ◽

10.1177/004051758005000612 ◽

1980 ◽

Vol 50 (6) ◽

pp. 392-392

Author(s):

R.P. Nachane ◽

K.R. Krishna Iyer

Keyword(s):

Breaking Strength

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Properties of Hard Rubber. XIX. Effect of Temperature on Cross-Breaking Strength and Elongation

Rubber Chemistry and Technology ◽

10.5254/1.3543284 ◽

1947 ◽

Vol 20 (2) ◽

pp. 525-526

Author(s):

W. H. Willott

Keyword(s):

Breaking Strength ◽

Testing Machine ◽

Effect Of Temperature ◽

Loading Test ◽

Standard Size ◽

Test Pieces ◽

The Cross ◽

Hot Weather ◽

Electric Radiator ◽

Usual Order

Abstract In a series of cross-breaking tests carried out on hard rubber during hot weather, the values of the breaking elongation were higher than was expected, although the cross-breaking strength was of the usual order. It was thought that the high temperature might account for these results by making the hard rubber more plastic. The following experiments were, therefore, performed to investigate the effect of small changes of temperature, such as are encountered at different times of the year, on the cross-breaking strength and elongation. Test-pieces of standard size (75 × 25 × 5 mm.) were cut from a sheet of hard rubber of the composition: 68 per cent rubber, 32 per cent sulfur, which had been vulcanized for 5 hours at 155° C. They were immersed in a beaker of water and kept at the required temperature for about 15 minutes, when they were judged to have attained a steady temperature. The tests were carried out on an Avery fabric-testing machine fitted with special clamps to give a three-point loading test, the distance between the supporting knife-edges being 50.4 mm. (2 in.). These clamps were heated to the temperature of the specimens by means of an electric radiator. The specimens were tested as soon as possible after they had been removed from the water, so that the change of temperature during the test was reduced as far as possible. The standard conditions already laid down, were observed.

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