Ismat Seals & Hydraulics Sharjah

Also known as Teflon (Du Pont brand name), PTFE is a highly crystalline thermoplastic with excellent sliding properties, anti-adhesive surfaces, excellent insulation properties, an almost universal chemical resistance and an exceptionally broad temperature deployment spectrum. However, this is offset by low mechanical strength and high specific weight compared to other plastics. To improve the mechanical properties, PTFE is compounded with fillers such as glass fiber, bronze, carbon, graphite etc.

Polypropylene is a semi crystalline thermoplastic with high rigidity and very good chemical resistance. A distinction is also made between homopolymers and copolymers, copolymers are tougher but have less mechanical and chemical stability. The stock shapes offered by us are PP homopolymers as they are a superior type of PP.

POM also known as Polyacetal and Delrin. This is highly crystalline thermoplastic with a high level of stability and rigidity as well as exhibits good sliding properties. POM-C has excellent sliding properties and good wear resistance, together with its other outstanding properties, POM-C is well suited for sliding applications with medium to high loads. This also applies to applications where high levels of humidity or wetness are to be expected. POM-C is not resistant to UV rays, UV rays, in combination with atmospheric oxygen, oxidize the surface, and discoloration occurs or the surface become matt. If the material is subject to the effects UV rays for a long time, it tends to become brittle.

Laminate manufactured from extra fine and super extra fine cotton mesh impregnated with a Phenolic resin binder. It is characterized by its very great mechanical strength and low specific gravity. Resilient against a wide variety of chemical agents, it is highly resistant to wear and due to its finer surface, has better Machineability than paper grades. Phenolic laminates are mainly used in industrial applications in the electronics, power generation and aero-space industries. Mechanical grades of fabric reinforced Phenolics rod and sheets are available ready stock. Fabric Based Industrial Laminates F1 grade material is manufactured from fine weave scoured cotton fabric, this has got good electrical and mechanical properties and can be machined to fine finish. This grade is suitable for small components such as instrument gears as well as intricate machined parts. F2 grade material is manufactured from medium weave cotton fabric, the material of this grade has superior machining and punching properties and better resistance to chemicals, Recommended for small parts. F3 grade material is manufactured from coarse weave, grey cotton fabric, the material of this grade is strong and tough with good machining properties, it is suitable for heave duty gears and applications requiring high impact strength. F4 grade material is manufactured from medium weave fabric with very good die electrical properties and medium mechanical strength, some of the applications of the material is armature wedges, generators slot wedges insulation and bus bar support etc. Associate Companies Location Map Location

PVC-U (Hard PVC) is an amorphous thermoplastic with no added plasticizer. It has high hardness and rigidity. According to DIN 16 927 the material is classified as normal shock resistant, however its toughness values border on being rated as highly shock resistant, which gives it a high degree of safety in regards to the design of components. PVC-U is a flame retardant material with an exceptional chemical resistance and also lower stress cracking. It shows high mechanical strength, tensile strength and works with a continues operating temperature of -15˚C to +60˚C. It can be easily glued and welded. PVC-U is not subject to any major sliding abrasion and is thus not suitable for use in sliding applications. PVC-U is resistant to acids, alkaline solutions, alcohols, oils, fats, aliphatic hydrocarbons and petrol. PVC-U is not resistant to benzole, chlorinated hydrocarbons, ketones or esters. In combination with strong oxidizing materials (e.g. nitric acid or chromic acid), there is a danger of stress corrosion cracking.

PEEK is a semi-crystalline thermoplastic with excellent sliding properties, very good mechanical properties, even under thermal load and an excellent resistance to chemicals. The PEEK semi-finished products that we offer come in sheets, rods and tubes form, from these we can also manufacture finished parts made to specific requirements.