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| LATEX CONCENTRATE - MATEX |
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With a dry rubber content of 60%, this is a technically specified high quality raw material for manufacturing
purposes. |
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There are two types – high ammonia (HA)
and low ammonia (LA). |
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HA is preserved with 0.7%
W/V ammonia. LA is preserved with 0.25% W/V ammonia together
with a secondary preservative which is zinc oxide or tetra
methyl thiuram disulphide (TZ). |
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MARDEC's MATEX HA and MATEX LA are sold either in drums or in bulk.
MATEX 133L (LA 67) is a type of Low Ammonia High Total Solid Latex Concentrate for the foam, thread and adhesive industry.
Natural rubber latex concentrate is a versatile material
suitable for general purpose applications and many specialized
processes and products. It has high uncured gel strength,
and shows rapid vulcanization and excellent vulcanizate
properties – high tensile strength, high elongation
at break, high resilience and low compression set. The
grades just described have good mechanical and chemical stability.
MATEX can be used in the manufacture of many latex-based
rubber products. These include dipped goods such as household,
medical and surgical gloves, latex thread and tape, toys,
balloons, teats, soothers, medical tubing, catheters, adhesives
and binders, latex foam, carpet backing, etc.
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| MARUB SMR CV |
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This grade of natural rubber, produced from
high quality field latex, has a Mooney viscosity stabilized within a narrow range. |
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Generally softer than the non viscosity-stabilized grades, it increases the productive capacity of mixing equipment. |
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It forms a coherent band almost instantaneously, thus increasing
milling throughput. |
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The processability of this rubber
is unlikely to be adversely affected during storage, as evidenced
by the insignificant increase in the Mooney viscosity value with time.
SMR CV is suitable for use in a wide range of products,
such as mechanical mountings for engines and machinery, railway
buffers, bridge bearings, vehicle suspension systems and general
automotive components, large truck tyre treads, conveyor belt
covers, cushion gum for retreading, and injection moulded
goods, including rubber-to-metal bonded components. |
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| MARUB SMR L |
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This is a light-coloured rubber produced from high quality field latex. |
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Selective blending of field
latex with an appropriate choice of preservatives and strict
control of processing conditions guarantee the production
of uniformly pale-coloured rubber. |
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SMR L possesses superior heat ageing resistance and exhibits excellent
vulcanizate properties, including high tensile strength, modulus
and elongation at break. |
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SMR L, with its uniform
light colour, is the ideal choice for production of light-coloured or translucent products such as shoe soles, pressure-sensitive tapes, surgical and pharmaceutical products, industrial
printing rollers, gaskets, etc. |
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| MARUB SKIM |
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This is manufactured from skim latex,
a by-product of the centrifugation of natural rubber
latex to make concentrate. |
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Marub Skim is similar to SMR 5, with a higher content
of nitrogen. |
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It has high initial Mooney viscosity. |
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Marub Skim is fast curing
and slightly more scorchy than conventional grades of natural
rubber. This inherent scorchy behaviour can be controlled by
the use of delayed-action accelerators.
Skim rubber can be used to advantage in tyre retreading compounds,
and for ebonite and microcellular products, as well as in the manufacture of
general rubber goods such as car mats, flaps, rubber tiles
and shoe soles.
It can also be blended with other grades of NR in the
right proportion to get products of the desired quality
with reduced overall cost of raw material. |
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| PV LATEX - MARVULTEX |
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This chemically modified latex gives a vulcanized
film on drying. |
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The latex remains fluid and stable and can be stored for at
least 3 months. |
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A variety of grades is available, e.g. a low nitrosamine grade, and others for the production of general latex dipped goods, such as examination gloves, household gloves, balloons and
condoms. |
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| PA and SP RUBBERS |
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Processing Aid (PA) and Special Processing (SP) rubbers are latex-based natural rubbers in which a portion of the starting material is prevulcanized before
coagulation. |
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By varying the proportion
of vulcanized to raw rubber in the blend, various grades
of PA and SP rubbers can be obtained. |
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PA and SP rubbers are designed
specifically for the manufacture of articles requiring close
dimensional tolerances or an exceptionally smooth finish, e.g
extruded seals and calendared surgical items.
PA and SP rubbers increase extrusion and
calendar output, reduce extrusion and calendar collapse,
and minimize die-swell. |
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