A house of rubber Chemicals & Textile Auxiliaries    

 
Metroark 21R Emulsion

Characteristics
METROARK 21R Emulsion
is a Non-fugitive and primarily non-ionic emulsion containing 35% dimethyl silicone fluid. It is an effective and widely used release agent for rubber. 

This emulsion creates a thin but highly effective parting film. It does not carbonise or gum even at temperatures which would quickly destroy organic mould release agents, does not build up on moulds, and does not discolour or damage rubber or plastics. 

METROARK 21R EMULSION gives an excellent surface finish to moulded parts. The reason for this characteristic is that the average particle size of 21R Emulsion is 0.5 microns. This fine particle size also contributes to the excellent release properties of 21R Emulsion and the stability of both diluted and undiluted emulsion.

Typical Properties
Per Cent Silicone 35
Particle size in microns 0.5
Colour

Milk White

Thinner Water
 
Packing
METROARK 21R Emulsion is supplied in 1Kg, 4Kg, 20Kg, 35Kg and 200Kg containers.
Applications
Although it is used primarily as a mould release agent, METROARK 21R EMULSION is used in many other applications, including the following:-

1)  Textiles

a)  Lubricant for hosiery borders. The use of this emulsion has greatly reduced the number of runs in fine hosiery during manufacturing.

b)  Yarn Lubricant The addition of one percent of 21R Emulsion to the trough solution reduces needles wear and yarn breakage.

c)     Treatment for glass fabric used as exhaust filters serviceable up to 4000F

2)    Glass and Ceramics

a)    Properly applied and cured onto glass and ceramics, Metroark 21R Emulsion forms an invisible, durable silicone film that imparts dedicated characteristics to the treated surface. It minimizes the adhesion of other materials to the surface, thus improving free draining characteristics and facilitates cleaning. It increases water repellence, improves retention of high surface resistivity under high humidity conditions.

b)    In vials or bottles for costly pharmaceuticals, free drainage means that less product is needed to ensure a given dosage.

3)   Closures: Release agents for rubber stoppers and rubber gaskets used on screw tops and bungs.

4)   Bags Tubers: Release agents for surfaces of tubers used to form polyethylene and other plastic bags.

5)   Wire and Cable lubricant: Metroark 21R emulsion does not support fungus growth. Hence, the appearance of stored cable is not damaged by fungi, which feed on paraffin.

6)   General

a)     Lubricant and anti-sticking agent for extruded rubber parts. Prevents newly coiled extrusions from sticking together and improves surface appearance.

b)     Release coating for conveyors. Prevents sticking of products to conveyors, even those operating at high temperatures.

Effect of hard water Rust Inhibitor

The use of hard water will not effect the stability of the emulsion. However, the minerals in the hard water will gradually build up on the mould surfaces

Diluting and applying
Metroark 21R emulsion can be readily diluted to any desired concentration upto 200 parts water to one part emulsion. The diluted emulsion can be sprayed, brushed or wiped onto moulds.

Metroark 21R emulsion is formulated with a small amount of sodium nitrate so that it will not cause rusting. This amount of sodium nitrate is sufficient in product –water ratios up to 1:1. In more dilute solutions, the same degree of inhibition can be obtained by adding 0.1 pound of sodium nitrate for each 100 parts of water. This should not be taken to imply that Metroark 21R emulsion can be used as rust preventve on metal.

 

 






 

Date:

 
© Copyright 2008 H & K Agencies. All rights reserved.

Home | About us | Innovation | Enquiry Form | Contact us | Sitemap