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Explanation of professional terms in rubber industry

Release time:2020-12-17

Reinforcing agent reinforcing agent is used to advance rubber to resist the action of mechanical force.

Reinforcing slope material reinforcing filler A reinforcing agent that has nothing to do with the vulcanization process.

Release agent (for molding) release agent, mould lubricant is a substance that is applied to the inside and outside of the mold or added to the material to be molded in order to make the product easily taken out of the mold.

Re-odorant is a substance added to rubber to give rubber a special fragrance.

Resilience: The ratio of output energy to input energy when the deformed sample is fully recovered (or instantaneously).

Resin resin has a higher molecular weight but does not recognize organic materials with a specific melting plan. Note: Resin can be used as softener, tackifier, processing aid, reinforcing agent and vulcanizing agent.

Retardant, scorch retarder retarder A synergistic agent used to reduce the tendency of premature vulcanization of rubber compounds.

Vulcanization reversion The anaerobic degeneration of the vulcanizate's modulus and modulus-related functions due to the continuous exposure to the vulcanization temperature. Note: The reversion of vulcanization is caused by the decrease of crosslink density.

Reverting cure, peak shape vulcanization reverting cure When the modulus of the vulcanized rubber reaches its maximum value, continue to place it at the vulcanization temperature to cause the modulus to decrease.

Root mean square strain root mean square strain The square root of the mean square value of the uniform strain within a deformation cycle. Note: Regarding symmetrical sinusoidal strain, the root mean square strain is equal to the strain amplitude divided by.

Root mean square stress root mean square stress The square root of the mean square value of the uniform stress in a deformation cycle. Note: Regarding symmetrical sinusoidal stress, the root mean square stress is equal to the stress amplitude divided by.

Rubber rubber can be modified or has been modified to a certain state of elastomer. In this modified state, it is insoluble in boiling solvents such as benzene, methyl ethyl ketone, ethanol-toluene azeotrope, but can swell. Together in its modified state, it is not easy to re-mold it into a fixed shape by heating and proper pressure. Note: The modified rubber is stretched to twice its original length at the standard room temperature (180℃-290℃) under the condition of no diluent, and persists for 1 min. After unloading, it can return to its original length within 1 min. 1.5 times or less.

Rubberize rubberize to impregnate and/or coat the matrix material with rubber.

Rubber latex Emulsified water dispersion of rubber particles.

Salt bath See Liquid Bed Vulcanization Medium (LCM).

Sample sample One or several products obtained from a batch, intended to provide information about the batch of products, and can be used as a basis for judging the batch of products and the production process. Note: According to ISO 3534-2; 1993 Statistics Terms and Symbols Part 2: Statistical Quality Control.

Scorch Premature vulcanization of scorch rubber compound.

Screw Screw uses a rotating part with one or several spiral grooves to push rubber along the extruder barrel.

Secondary accelerator,

Auxiliary accelerator booster A low-concentration accelerator used together with the main accelerator to obtain the optimum vulcanization speed and vulcanizate function.

Second-order transition (rejected) second-order transition Note: This term, when used in rubber, has been rejected and should be replaced by a glass transition.

Semi-efficient vulcanizing (semi EV) system is used for the sulfur-containing vulcanization system of diene rubber, which contains or does not contain sulfur donors, and its accelerator concentration is between the general sulfur vulcanizing system and the useful vulcanizing (EV) system between.

Whey (latex) The dispersion medium of serum latex.

Permanent deformation set The remaining deformation after the force of deformation is completely released.

Set after break Set after break The permanent set after the specimen is stretched to crack. See permanent deformation.

Sheeting (behavior) sheeting The process of changing rubber or rubber compound, thick mortar or agglomerated latex into a shape whose thickness is smaller than its length.

Shelf ageing The aging during storage between production and final use.

Adhesive (behavior) skim coating, topping The process of applying a thin layer of rubber compound or compound to the sheet without applying significant shear between the rubber and the sheet material.

Skim rubber skim rubber Rubber obtained from dilute latex separated during the concentration of natural rubber latex.

Crust (porous material) skin A relatively dense glue layer on the surface of porous material.

Residue (latex) sludge The deposit in latex that has not cooperated.

Softener softener is a small-dose cooperative agent used to reduce the stiffness of the rubber or the hardness of the vulcanized rubber.

Sol sol rubber is soluble in the part of the rubber selected as the solvent.

Solution polymerization solution polymerization One or more monomers are dissolved in a solvent system and react to the process of polymer production.

Sponge rubber Sponge rubber is a porous rubber with open pore structure mainly made of dry rubber compound.

Spreader Spreader is a machine that uses a scraper to distribute thick glue or latex onto the surface of the sheet material.

The spring constant K is the weight of the applied force that is in phase with the deformation divided by the deformation.

Stabilized rubber latex Stabilized rubber latex is a latex treated to suppress premature agglutination.

Stabilizer (rubber) stabilizer is a substance that exists or is added to raw rubber in order to maintain or maintain the original function value of raw rubber during drying, processing and storage.

Stabilizer (latex) stabilizer In order to prevent agglomeration or agglomeration of rubber particles, especially in the process of cooperation and subsequent processing, and the substance mixed into the latex. Note: Stabilizers can naturally exist in latex.

Stain For specific definitions, see touch contamination, extraction contamination, moving contamination, and soak contamination.

Standard compound standard compound According to the rule formula, the compound compound prepared by the standard reference co-agent and mixing procedure is selected.

The stiffener is used to add a co-agent for the viscosity of unvulcanized rubber.

Storage hardening The addition of viscosity of raw rubber and unvulcanized rubber during storage. Note: Unlike low-temperature crystallization, storage hardening cannot be reversed by thermal methods.

Storage period, storage life storage life, shelf life data or products are stored under the regulation conditions after the production of the time limit and still adhere to its regular function.

F storage shear modulus See elastic shear modulus.

F storage Young’s modulus See Young’s modulus of elasticity.

Strain Because of the force, the object specification is related to the change of the original specification.

Strain amplitude The ratio of the maximum deformation measured by uniform deformation to the safe specification of the unstrained experiment (uniform value on only one side).

The strainer is an extruder machine designed to force rubber or rubber compounds through one or several screens to remove solid foreign impurities.

Stress stress The strength of the internal force (or the weight of the force) acting on a given plane through a point of the object at that point. Note: The stress is indicated by the force per unit area. When stretching, shrinking or shearing experiments, the stress shall be calculated according to the original specifications of the corresponding section of the specimen.

Stress relaxation stress relaxation Under stable strain, the stress decreases with time.

Structure (carbon black) The function or characteristics of structure carbon black aggregates are indicated by the sum of the number of particles in each aggregate, the specification, the shape of the aggregate and the tightness of the particle combination.

Sulfur donor vulcanizing system Sulfur donor vulcanizing system A vulcanizing system in which there is no elemental sulfur and all the sulfur used during vulcanization is supplied by sulfur-containing substances. Note: This kind of vulcanization system is sometimes called "sulfur-free vulcanization system".

Swelling The volume of a sample immersed in a liquid or exposed to steam increases.

Synthectic rubber Synthectic rubber is produced by polymerizing one or more monomers.

Perseverance (unvulcanized rubber) tack The function of making the touch and appearance of unvulcanized rubber or compound rubber adhere to each other.

Tackifier tackifier is a co-agent used to advance the properties of unvulcanized rubber.

Tear (rubber) tear The rubber is mechanically split due to high stress concentration caused by cutting, sharp edges and corners or partial deformation.

Tear strength tear strength The force required to tear a regular sample along the root parallel to the principal axis of the sample.

Stretching modulus and tensile modulus are synonymous with the preferred term fixed tensile stress.

Tensile strength The maximum tensile stress applied during the time the specimen is broken.

Tensile stress: The stress applied by the tensile test specimen, calculated by dividing the applied force by the original cross-sectional area.

Tensile stress at a given elongation The stress required to stretch the useful part of the sample to a given elongation. Note the comparison: tensile stress.

Tensile fatigue Tensile fatigue is a process in which cracks are added to a sample or product that is subjected to repeated tensile stresses to cause splitting.

Tensile permanent deformation tension set The remaining elongation after the specimen is stretched and retracted safely.

Terpolymer is a polymer composed of three different monomers.

The test piece has a suitable shape and specification, and is prepared for experiment data. Note: In the United States, the word "specimen" is generally used to indicate "sample".

Thermal carbon black Thermal carbon black is a type of carbon black produced by airless and flameless thermal cracking of liquid or gaseous hydrocarbons or a mixture of the two under controlled conditions.

Thermal degradation Thermal degradation is degradation caused by temperature increase caused by external heating or internal heat generation.

Thermoplastic elastomer The commonly used commercial term for thermoplastic rubber.

Thermoplastic rubber thermoplastic rubber does not require vulcanization (ie, cross-linking) during processing, but has a function similar to vulcanized rubber at its operating temperature or polymer blend. At the processing temperature, the function of this vulcanized rubber disappears, so it can be further processed. This function is restored when the data returns to its operating temperature.

Thermosetting (adj.) thermosetting (adj.) can irreversibly become insoluble materials or products.

Thickener (latex) thickener is a small-dose collaboration agent used to add viscosity to latex or collaboration latex.

Critical strain (static ozone test) threshold strain The highest tensile strain at which rubber is exposed to air with a given ozone concentration at a given temperature for a given period of time without ozone cracking.

Tinting strength (carbon black) tinting strength under regular conditions, compared with a reference carbon black, the ability to reduce the reflectance of the white paste. Note: The color intensity is generally indicated as the dimensionless ratio of the reflectance of the standard paste to the sample paste. Both pastes are prepared and tested under regular conditions.

Total sulfur contains all the sulfur that exists in the material, regardless of the chemical form or origin of sulfur.

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