brief product description
Industries that typically use adhesives and sealants are like
construction, consumer products, assembly, packaging, labeling, and
transportation. Adhesives and sealants are made from various
combinations of petroleum-derived plastic resins, synthetic rubber
elastomers, and agents or additives which are used to enhance
certain characteristics. Rubber adhesives and sealants are highly
flexible, natural or synthetic materials whose main purpose is to
join components or fill gaps between seams or on
specification
Types of Rubber Sealants and Adhesives
Rubber adhesives are made up of natural and synthetic rubbers.
Accordingly, the various types of rubber adhesives and sealants are
as follows:- Natural Rubber Adhesive: This consists of a rubber solution and bonding is attained by
evaporation of the solvent. This type of adhesive and sealant is
not suitable for adverse environments or for structures that need
to withstand high loads. It performs well in water. However, it is
not resistant to oils and solvents. Natural rubber adhesives and
sealants are used to bind glass, wood, paper, plastic, fabric,
rubber, iron or steel.
- Polychloroprene (Neoprene) Adhesive: This type of adhesive or sealant offers strong, quick and
permanent bonds and the joints are made by contact adhesion without
the use of clamps or jigs. This is used to bind plastics, wood,
leather and metal.
- Acronitrile Butadiene Adhesive: This type of rubber solution is used to bind rubber and plastics.
- Butyl Rubber Adhesive: The adhesives have low permeability, inherent tackiness and aging
resistance. This kind of adhesive and sealant is specifically used
to repair the inner tubes of tires and to bind some plastics.
- Styrene Butadiene Adhesive: This adhesive is usable in the automotive industry because of the
pressure sensitive variation. It binds all rubber products.
- Polyurethane Adhesive: This is a adhesive or a sealant having two component adhesives.
This type of adhesive is resistant to acids, alkalis, solvents and
oils. A variety of materials including plastics, metals,
polyurethane and glass could be joined using polyurethane adhesive.
- Polysulphide Adhesive: It offers chemical resistance and flexible bonding. Materials like
wood, ceramics, concrete, glass, aluminum and steel could be joined
using this adhesive which is also used as a sealant.
- Silicone Rubber Adhesive: It features high service temperature in the range of 300 degree C
and low shear strength. This type of adhesive is best suited for
sealing applications, glazing and for binding metals, glass and
silicone.
Buyers Tip
There are certain specifications that a buyer should know before
buying rubber sealants and adhesives:- Gap fill: Maximum space that an adhesive can accommodate between the
substrates.
- Viscosity: Measure of fluidity of the adhesive.
- Coefficient of thermal expansion: Linear expansion or contraction of the adhesive for unit change in
temperature.
- Thermal conductivity: The ability of the adhesive to transfer heat.
- Elongation: The fractional rise in the length of the adhesive film under
tension.
- Tensile strength: Maximum stress that an adhesive film is capable of withstanding.
Advantages- The rubber sealant and adhesive films formed after drying can be
peeled off without causing damage to the surface of the adherent.
- They adhere to a wide range of materials and feature a high initial
tack.
Disadvantages of Rubber Sealents- They have comparatively low shear strength and hence used for
unstressed joints.
- Cannot be used for loaded structures or adverse environments.
- Unsuitable for continuous loadings.
- Low resistance to temperatures, chemicals, ultra violet light and
oxidation.
Applications- In medical applications such as