Adhesion is the tendency of dissimilar particles or surfaces to cling to one another. Adhesive materials fill the voids or pores of the surfaces and hold surfaces together by interlocking.
A rubber compound is a combination of 3 to 15 different ingredients choosen from thousands of different chemicals. We call it a “recipe”. Compounds mostly contain: polymers, fillers, antioxidants, antiozonants, oil and curing system. Depending on the final application and the demands of our customer, we mix the right ingredients into the polymer so that our final product can be approved.
The compression set measures the rubber specimens ability to retain its original elastic properties after compressive forces have been applied for a certain period of time at elevated temperatures.
Delivered at place. In this case we may create a unit price which contains the cost of the shipment. Our contracted couriers we ship your products anywhere.
Flash is the excess material attached to a molded rubber product, which must usually be removed.
The process of removing flash, known as deflashing, is commonly performed via cutting, breaking, grinding or tumbling. This is the end of the rubber manufacturing process.
Demoulding is the process of separating a rubber part from the molds.
Die casting is a manufacturing process that can produce geometrically complex metal parts through the use of reusable molds, called dies. By SIC, die casting is used for producing rubber parts by forcing heated rubber compound under high pressure into a die cavity.
Medium to high volumes of tuber gaskets often produced by die cutting. Die cutting is a method when gasket shapes are cut from larger rubber sheets or rolls resulting flat rubber items.
An elastic polymer which has weak inter-molecular forces is called an elastomer. When vulcanized, generally called rubber. At room temperature it can be bent, stretched, deformed and rapidly returns to the original shape.
The increase in a length measured after a rupture or break divided by the sample’s original length is referred to as elongation. Elongation defines as a percentage how much a specimen stretches before it breaks. The greater the elongation, the higher the ductility or elasticity of the material.
Ex works. The buyer is responsible for covering the cost and taking care of loading the goods onto the vehicle on the seller’s depot.
After the transmission to the first carrier, buyer is responsible for cost and risk.
ISO9001 is an internationally recognized quality management system developed by the International Organization for Standardization (ISO) in order to increase customer satisfaction through the deliverance of products and services.
Laser cutting is commonly used in industrial manufacturing for cutting variable materials. It works by directing the output of high power laser through optics.
Molding is the process to manufacture a liquid or raw material into a shaped product. The mold is hollow and contains the form of the final product.
The parting line is the plane in which the two halves of the mold meet. A parting line is by standard visible but can be removed on request during the deflashing process.
Non-blooming rubber have no discolouration or change in the appearance of the surface of the rubber due to the migration of solid or liquid materials/substances.
Non-staining rubber products do not leave a mark after its removal from being mounted on metal, glass or plastic surfaces.
Peroxide is also a vulcanizing agent which improves heat stability, the modulus, the aging and the compression set of compounds. Additional benefit is that the color of the compound will not revert during the cure phase and will less likely bloom.
Platinum cured silicone rubber products are generally more transparent in color. The physical properties compared to peroxide cured products are better, especially tensile and tear strength. The more complex manufacturing process means higher production cost than with peroxide curing.
It is the same process as platinum curing.
Post-curing finishes rubber processing, creating a stable structure as a result. There are by-products calles volatiles left in the product after the initial curing as a product of chemical reactions. In order to remove these by-products, the rubber is placed into a static oven with a temperature of around 200 °C for 4 hours. This process is calles post curing.
The release agent is a helpful chemical which is sprayed on the mold in order to prevent the rubber part to stick into the mold during the vulcanization process.
RTV silicone is a pourable type, two-component system of rubber that solidifies on room temperature.
Each elastomer has its own advantages and disavantages. The blending of elastomers is used to enhance the performance characteristics of rubber products.
An avarage rubber compound contains 10-15 times higher amount of fillers than chemical additives. The filler has a big impact on the properties of the rubber product. Most of the rubber fillers used today offer some functional benefit that contributes to the processability or utility of the rubber product.
A mixture that consists of rubber with one or more compounding ingredients in definite proportions but higher concentrations than in a normal mix and that is used for convenience in compounding.
Installing separate rubber rings or sealants on metal parts has disadvantages, as they can not be precisely fitted. The slightly moving parts will cause a limited lifetime. Rubber can be molded on metal parts creating a permanent adhesion between the two. We strongly recommended to use rubber-metal technology at high value seals.
Sulfur is one of the most common and cost effective vulcanizing agent for unsaturated rubbers in manufacturing practice.
Surface roughness measurement is a quantitative assessment of finely spaced surface irregularities. Many factors can influence the surface finish, but the quality of the mold surface has a huge impact on the surface quality on the final product. In general, the better the wished surface the higher the manufacturing cost.
In the broader sense, interfacial tension is defined as the work which must be expended to increase the size of the interface between two adjacent phases which do not mix completely with one another. In the narrower sense (and in this glossary) the term relates to the liquid/liquid and liquid/solid phase boundaries, while for the liquid/gaseous interface we refer to surface tension and for the solid/gaseous interface we refer to surface free energy.
Finishing process that may improve appearance, control surface friction, remove burrs, increase wear resistance or prepare adhesion.
The maximal stress that a material can withstand while being pulled. Measured in Mpa.
Thermoplastics are a family of plastics that can be molten when heated and harden when cooled. When frozen, however, a thermoplastic becomes glass-like and subject to fracture. These characteristics, which lend the material its name, are reversible. That is, it can be reheated, reshaped, and frozen repeatedly. This quality also makes mechanically recyclable.
Vulcanization is a chemical process by which the physical properties of rubber are improved.
In its simplest form, vulcanization is brought about by heating rubber with sulfur.
A water jet cutter machine is and industrial tool, which is capable of cutting variable materials by using a stream of very high pressure water.