Cut-resistance tests

The penetration mechanism of a slash attack has been discussed in detail in section 7.2.4.3. Eig. 7.2 shows the different forces applied by a knife attack. It can be observed from Eig. 7.2 that the load apphed by a knife attack increases rapidly upon contact, whereas the loads applied by different cut resistant test methods are constant load. There is a rapid increase in load when using BS EN 1082-3, but all the load is applied on the pointed tip of the blade, while in a slash, all the load is applied on the edge of the blade (Fig. 7.3). 

Fig. 7.4 Load applied during different cut resistance tests.

The introduction of industry-accepted cut resistance testing and qualification has also aided in the growth of new fibers and technologies by supporting claims of superior cut results with scientific facts. Many apparatuses are available for use to demonstrate... 

US Bur of Mines(Ref 3) describes the following tests, under general title Fire Resistance Tests a)F use Test. Insert an 8 iong piece of squarely cut burning fuse into a test tube % " x 7 (clamped on a stand) with spit end against 3 g of the expl. Ignite the projecting end of the fuse and observe the behavior of the... 

Cut-resistance is an important property of leather against mechanical forces, especially for products that are more at risk of cutting such as gloves, shoes or sport goods. The test method is to measure the force needed to cut through the sample at a distance of 20 mm (International Organization for Standardization, ISO, 1999). 

Figure 3.4 is a schematic diagram of the apparatus for testing cut-resistance. It... 

Although several test standards exist for the measurement of cut resistance, the principles used in these methods do not apply to measuring slash resistance. These methods measure the resistance of a cut, where the load applied is continuous. A slash has au instantaneous force which is similar to a stab but one which increases rapidly. This mechanism/working principle of a slash was discussed in detail under section 7.2.1. Table 7.3 provides a brief comparison of the various test standards that are used for the measuraneut of cut resistance of a fabric. 

There are two European standards that spedly a method of testing cut resistance of a fabric against sharp objects. These are BS EN 388 2003 and BS EN ISO 13997 1997. - BS EN 388 2003 was developed specifically for gloves and it details the test methods for measuring abrasion resistance, blade cut resistance, tear resistance, and puncture resistance. BS EN ISO 13997 1997 was developed for any protective clothing and specifies the test method for the determination of resistance of a fabric to cutting by sharp objects. 

The European standard stipulated for the measurement of cuts and stabs is BS EN 1082-3 2000. The third part of this standard specifies the impact cut test for fabrics, leather and other materials. It was developed for the testing of gloves and arm guards for cut resistance. 

Fig. 7.4 shows the load applied on a specimen when tested nsing the methods described in different cut resistance standards. These loads do not replicate the load applied by a knife attack. 

Although there are methods available to study the cut resistance of yam, there are no standardised methods or methods that are well established. Hence, the initial analysis of each of the yams was based on its tensile properties. The yams were shortlisted based on the stress/strain analysis and these yams were used in the manufacture of the slash resistant fabric. The ideal yam for the slash resistant fabric was chosen based on its performance in the fabric against the slash resistance test. 

Tilsatec Rhino" " offers more cut resistance per gram weight at a lower price based on Cut Protection Performance Tests ANSI Level 4 5 cut resistance reduces worker injuries and injury-related costs... 

Leaf cuttings were tested for heat resistance by 5 min heating in an aquatic ultra-thermostat (5), for cold resistance they were frozen for 5 min in a micro-refrigerator (6). Temperature inducing cytoplasmic coagulation in 50% of the palisade cells (LTcq) was taken as the value of thermoresistence. The value oi thermostability of PSA membranes was the temperature (Tq ) corresponding to the 50%... 

EN 13595-4 2002 - Protective clothing for professional motorcycle riders. Jackets, trousers and one piece or divided suits. Test methods for the determination of impact cut resistance. 

In adtJition, we ll explain the significance of cut-level score ranges and testing methods related to ANSI, ASTM, and EN. You ll come away knowing what each of these means to the cut-resistant glove wearer. Don t miss out on this opportunity to step up your cut-resistant hand protection arsenal. You can be sure, the cut stops here ... 

Cut-resistant gloves earn their title through stringent testing. There are three standardized methods for testing cut resistance ... 

Additionally, many cut-resistant gloves are tested for abrasion resistance. 

The testing data is standardized for all cut-resistant gloves tbrough the American National Standards Institute, which rates cut resistance fiom Level 0 to Level 5. The higher the level, the greater the cut resistance. 

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