High Modulus Furnace

The purity of the electrolyte must be considered and an additive such as MgC03, added as a non-caking compound, can have a most deleterious effect, depositing on to the fiber during surface treatment. 

With an aqueous surface treatment system, the bath electrolyte level must be checked and the electrolyte concentration be determined by measuring the specific gravity. The temperature, voltage and amperage should be regularly monitored. The surface of the bath should be kept clear of fiber debris, filters cleaned regularly and electrolyte circulation checked. The efficiency of the water wash section can be monitored by determining the conductivity of a water extract of the treated and washed fiber. 

Insufficient surface treatment gives a low composite ILSS, whereas if the level is too high, the fiber becomes brittle. The mode of failure of the ILSS specimen can be a useful guide to the degree of treatment. 

The fiber cosmetics will be badly affected if a roller at the bottom of the bath does not turn freely. The bearings must be regularly inspected. 

To measure the current, it is now necessary to measure the resistance of a one meter length of identical carbon fiber tow, say R 2m , hence resistance of a 10 cm length is i /10 Q. 

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HMF black. Abbreviation for high-modulus furnace black. 

N600 to N699 high modulus furnace, HMF, general purpose furnace, GPF, and all-purpose furnace, APF... 

GPO Elastomeric copolymer from propylene HMF High-modulus furnace blaek... 

SAF - Super abrasion furnace, ISAF - Intermediate super abrasion HAF - High abrasion furnace, FEF - Fast extmsion furnace SRF - Semi reinforcing furnace HS - High structure, LS - low structure, HM - High modulus ... 

The E-modulus of extruded ceramic honeycombs is readily obtained by measuring the resonance frequency of MOR bars over a wide temperature range. Such a measurement is carried out in a high-temperature furnace according to ASTM specifications [40]. The E-modulus data and E ) for the two substrates are summarized as function of tempera-... 

Fast extruding furnace carbon black FF N550 Oil furnace 53 43 Medium high reinforcement, high modulus and hardness, low die swell and smooth extrusion, used in tyre inner lines, carcass and sidewall compounds and hose and other extruded goods... 

Initially, the in-house plant made high modulus fiber, using a bank of specially adapted Spembly furnaces processing the fiber up to 2500°C and it was not until later that the Rolls Royce engineers accepted that they could use carbonized fiber with a modulus of about 200 GPa. 

Early work for producing high modulus fiber used a resistive heated furnace with a British Acheson grade CS graphite tube element, with power fed to each end through a... 

Basieally, the high temperature furnace elevates the temperature in a uniform manner to inerease the fiber modulus and a smaller d tex fiber will give a higher modulus for a given... 

Figure 34 Logarithm of the storage modulus and tan S against temperature for HAF (High Abrasion Furnace) black filled natural rubber (40 parts black per 100 of rubber) bending at I Hz...

Figure 40 Shear storage modulus against double strain amplitude showing components of for natural rubber filled with HAF (High Abrasion Furnace) black (40 parts of by weight black to 1(X) of rubber) at 21 °C and 0.3 Hz...

High temperature strength of refractory materials is determined on rectangular prisms 25 x 25 x 150 mm cut from the product being tested. The specimens are placed ia a furnace, heated to a desired temperature, and the modulus of mpture is determined. A detailed description is given ia ASTM C583. 

The ash content of furnace blacks is normally a few tenths of a percent but in some products may be as high as one percent. The chief sources of ash are the water used to quench the hot black from the reactors during manufacture and for wet pelletizing the black. The hardness of the water, and the amount used determines the ash content of the products. The ash consists principally of the salts and oxides of calcium, magnesium, and sodium and accounts for the basic pH (8—10) commonly found in furnace blacks. In some products potassium, in small amounts, is present in the ash content. Potassium salts are used in most carbon black manufacture to control stmcture and mbber vulcanizate modulus (22). The basic mineral salts and oxides have a slight accelerating effect on the vulcanization reaction in mbber. 

GPF = general purpose furnace SRF = semireinforcing furnace MT = medium thermal HS = high structure LS = low structure LM = low modulus. Dibutyl phthalate [84-74-2] absorption. 

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