Polymer Tech

Standard Test Methods for Rubber—Viscosity, Stress Relaxation, and Pre-Vulcanization Characteristics (Mooney Viscometer) ASTM 1646-04

TESTING STANDARDS FOR RUBBER PRODUCTS - CHEMICAL ANALYSIS ASTM D-297- 93

  ISO 2781- Rubber Vulcanized or Thermoplastic - Determination of Density

Standard Test method for Rubber O rings ASTM D 1414-94 is used to measure the mechanical properties of vulcanized rubber o rings. Multiple different tests are utilized these properties such as tension , compression set, Low temperature, density. ASTM D 1414-94

Struktol MR 391 Struktol A 50 Struktol MR150 Struktol TS 35 DL STRUKTOL homogenizing agents improve the homogeneity of elastomers of different polarity and viscosity. They are rapidly absorbed by the polymers during the mixing cycle. A relatively low viscosity mass is quickly achieved into which other compounding ingredients can easily be incorporated. Struktol 40 MS flakes

Shinetsu Silicone Rubber RTV Silicone for Electrical, Electronic and general industrial use

DICUP98 - Luperox

UL Flame Rating - UL 94 UL flame ratings group materials into categories based on their flammability. UL 94 covers two types of testing: vertical burn and horizontal burn. Horizontal Testing (HB) Procedure: A specimen is supported in a horizontal position and is tilted at 45°. A flame is applied to the end of the specimen for 30 seconds or until the flame reaches the 1 inch mark. If the specimen continues to burn after the removal of the flame, the time for the specimen to burn between the 1 and 4 inch marks are recorded. If the specimen stops burning before the flame spreads to the 4 inch mark, the time of combustion and damaged length between the two marks is recorded. Three specimens are tested for each thickness. Horizontal Flame Test Horizontal Rating Requirements HB Specimens must not have a burning rate greater than 1.5 inches/minute for thick...

I n Moulding process the rubber is Cured at high temperature and Pressure, the resulting Moulded parts are smaller in size than the actual. The Difference in the thermal expansion of the mold material result in shrink rate Shrink Rate= ( Cavity dimension- Part Length)/ Cavity dimension) (Typical units in/in) This shrinkage value is applied to the desired finished part size to “scale up” the cavity. The resulting cavity dimension is calculated as: Cavity Dimension= finished part length/ (1- Shrink rate) For example: Shrinkage rate testing was performed on a 70 Shore A Nitrile (Buna-N), Ethylene-Propylene (EP), Fluorosilicone (FVMQ), and 75 Shore A Fluorocarbon (FKM).  The Fluorosilicone and Fluorocarbon materials undergo a secondary vulcanization process called post-curing. During the post-curing process, the molded parts were baked in a ventilated oven at a specific time and temperature recommended by the material manufacturer, or at a temperature g...

Grommets Grommets made of rubber or other elastic material are also used to minimize the transmission of vibration. They were widely used for mounting shock-sensitive computer  disk drives , particularly in equipment subject to vibration or jarring, but are not usually used with more robust modern drives. The screws that hold the drive in place pass through grommets that decouple it acoustically from the chassis.     Grommets have a lot of important uses. In construction, manufacturing or production and other related industries, grommets are usually used to cover the rough and sharp edges of a hole in metal. This is done to protect another material as it is passed through this hole. For this particular type of application or process, rubber grommet  is usually used.      When a wire must go through a hole in metal, a two-piece plastic grommet can be used. This type of grommet effectively and safely grips the wire and it is a very import...

Rubber Fenders Rubber Fenders are widely used in the automobile and industrial marine industry. Fenders are basically a surrounding or a barrier made of rubber, that surrounds the wheels of a vehicle to prevent sand, mud, rocks, water from being thrown into the air by the rotating tire. In other words, they are used to block splashing water or mud, while the tires are in motion. Instead of fenders, automobiles also make use of mud flaps  which serve the same purpose, but they are more flexible than fenders. Rubber fenders are more popular in the marine industry. Marine rubber fenders are objects that are placed along the sides of a boat or ship to provide a cushioning effect to prevent damage and protect the boat from impacting something harmful. Boat fenders are made from soft rubber or plastic and used between boats and other objects like piers, pilings, and docks to protect the boat from damage. fenders for boats are available in a wide ranges of shapes and siz...

Rubber Balls   Rubber balls are spherical shaped balls having varied applications. Right from a small toy ball to large industrial applications, the use of rubber balls is seen. They are used as check or ball valves, bearings, and in other applications. Rubber as an elastomeric material is a synthetic or processed material that can be shaped into many forms. The balls are manufactured in a number of different colors and elastomers/rubber types, depending on the application. Types of Rubber Balls Rubber balls are of various types depending on their area of applications. There are molded rubber balls, precision ground balls which are manufactured as per exact specifications. The commercial grade rubber balls are produced as per industrial requirements.  Rubber Sponge Balls Rubber Cleaning Balls Rubber Check Valves  Uses of Rubber Balls Rubber balls are used for a wide variety of uses like for screen cleaning and screen de-blinding, air ...

The medical industry is highly equipped with rubber products. The rubber products which are used in hospitals are wide and varied. Rubber is used to make various objects like surgical gloves, tubes, stoppers, condoms, breathing bags, cushioning or supporting materials, prosthetics, implants and catheters. Types of rubber used in making medical products Natural Rubber Butadiene Rubber Butyl Rubber Ethylene Propylene Diene Monomer (EPM, EPDM) Viton Nitrile Rubber Silicone Rubber Styrene Butadiene Rubber Types of Medical rubber products Some popular medical rubber products are as follows: ·          Rubber Caps/Tabs for Medical use:         Rubber caps are specially designed for medical purposes. These are caps on T-piece as the main adjunct which provides pass and injection port for infusion and transfusion sets. They are made of natural rubber and polychloroprene rubber. · ...