Flex crack resistance

Flex cracking resistance Very good Good Good Good Good... 

The most effective antioxidants for light coloured rubber compounds are the hindered bisphenols, but these offer little ozone and flex cracking resistance. 

Diaryl-phenylenediamines have very good antioxidant activity with good to moderate antiozonant characteristics, with low volatility but will possibly bloom to the rubber surface. They give very good flex cracking resistance. 

Use Rubber products having superior abrasion resistance, good wet-skin resistance, flex-cracking resistance, and good resilience. Automotive tire treads, belt conveyors, shoe soles, and resilient products. 

Use Applications where low extraction of plasticizers from the product, flex crack resistance, and utility in harsh environments are required. 

Attane resins offer low-temperature flexibility and flex-crack resistance, ideal for containing liquids that move freely within a package. Leaks and spills are avoided, and the package still offers excellent optics, high tear resistance, and other key properties. 

The molecular construction of Dow Primacor copolymers creates internal toughness, abrasion resistance, puncture resistance, and high environmental stress-crack resistance (ESCR). Flexible coatings with good flex-crack resistance and exceptional elongation are possible. 

Honeywell Oxy Shield nylon/EVOH oxygen-barrier (OB) film s combination of nylon 6 and EVOH delivers a strong mix of benefits the strength, toughness, and flex-crack resistance of nylon with the extremely low oxygen transmission rates, superior fla-vor/odor/aroma-barrier properties, with the outstanding solvent and oil resistance of both nylon and EVOH. The film is microwaveable and recyclable, and does not release harmful substances upon incineration.do 3]... 

Uses Urethane for coatings/finishes tor syn. textile fabrics that must have permanent fire retardancy, e.g., syn. pleated shades, vertical blinds Features Solv.-free produces tough, flexible dry film, stiff hand, exc. molding/pleating props., exc. UV resist. exc. low temp, flex crack resist., abrasion resist. 

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Such a structure in the moulding gives an optimum combination of flexing performance and resistance to water uptake. These two essential properties in a shoe sole tend to oppose one another it is relatively easy to have a closed cell-structure with low water uptake but poor flex cracking resistance, or to have excellent flexing, but with high water uptake. The polyester-based formulation developed by Clarks develops the structure to give both properties. 

Blends of NR and ethylene-vinyl acetate copolymer (EVA) (physical blends and statically vulcanized) combine the good elastomeric and mechanical properties of NR with the excellent ageing and flex crack resistance of EVA. Blends of NR/EVA copolymer are becoming an important rubber/thermoplastic elastomer blend. Applications of these materials can be found in fields where... 

Over the years there has been some interest in vulcanized maleated polyisoprenes because of their superior solvent resistance, flex cracking resistance and ageing resistance compared with conventional natural rubber vulcanizates. However where these properties are of importance there are other readily available polymers such as plasticized PVC, ethylene-vinyl acetate copolymers and the rubbery polyurethanes which may be more suitable. For this reason the maleated rubbers have not become of any commercial significance. 

Chemical protective clothing (requirements for fabric materials was defined in EN EN 14605 2005 Protective clothing against liquid chemicals Performance requirements (type 3 and 4 PB[3] and PB[4]) BS EN ISO 12947-2 1998 EN ISO 7854, method B, EN ISO 7854, method B at -30°C EN ISO 9073 EN ISO 13938-1 Abrasion resistance Flex cracking resistance Flex cracking resistance at —30°C Tear resistance (trapezoidal) Bursting resistance... 

Tire treads are made from oil extended BIMS, butyls, EPDMs, polybutylenes, SBR, and their blends. Butyls contribute skid resistance, brominated butyls BUR + SBR can increase wet traction, and chlorinated butyl (CIIR) increases skid resistance and rebound. BIMS also provides good flex crack resistance. ... 

MMBI is used to improve flex cracking resistance, but it tends to reduce the scorch time of compounds. Pronounced synergistic effects with ODPA or similar chemicals in order to optimize hot air aging have not been observed, so that it is not advisable to use this chemical where optimal heat resistance is required. 

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