What are the contents of the finished product testing items of rubber hoses?

Finished product testing: burst pressure, hydrostatic test, leakage test, low temperature flexure test, interlayer adhesion performance, vacuum resistance, ozone resistance, pulse test, pressure vibration temperature test, volume expansion, air permeability, outer cladding wear resistance, flammability test, conductivity test, resistance test and other items.

Shuangxing strictly selects the quality of rubber pipes, so it needs to strictly respond to various testing standards, and many factors from appearance to performance need to be tested.

1.Hose size inspection: inner diameter, outer diameter, outer diameter of reinforcing layer, wall thickness, concentricity, inner and outer rubber thickness, and inner diameter of the assembly are all dimensional tests for rubber hoses.

2.Hydraulic test: check whether the rubber pipe has leakage, deformation and damage after 30s-60s under the verification pressure.

3.Low temperature flexure test: Low temperature flexure test includes low temperature stiffness and low temperature flexure test.

Rubber tube inspection:

Physical index: volatile, ash, Mooney viscosity, vulcanization curve, Mooney coke time and other mechanical properties: hardness, tensile properties, tear properties, compression properties, impact properties, friction properties, fatigue resistance, peel strength, adhesive strength and other thermal properties

Vertical combustion, horizontal combustion, smoke density, limiting oxygen index, flame spread rate, thermal stability and other electrical properties: surface resistance, surface resistivity, volume resistance, volume resistivity, breakdown voltage, dielectric strength, dielectric loss, anti-static performance and other weather resistance test: aging test (ultraviolet, xenon lamp, carbon arc lamp, ozone), liquid resistance test, cold and thermal shock and other chemical analysis:

Ingredient analysis, heavy metal testing, RoHS, grade identification, etc.

Rubber is a highly elastic polymer material with reversible deformation. Rubber is elastic at room temperature, can produce large deformation under the action of a small external force, and can return to its original state after removing the external force. The rubber industry is one of the important basic industries of the national economy, which not only provides people with daily necessities, medical and other light industrial rubber products that are indispensable for daily life, but also provides various rubber production equipment or rubber parts to heavy industries and emerging industries such as mining, transportation, construction, machinery, electronics, etc.

First, the concept of rubber performance test.

Generally, rubber performance tests can be carried out in accordance with ISO, ASTM, DIN, GB, HB and other standards to test the physical and chemical properties and mechanical properties of rubber raw rubber, vulcanized rubber, rubber products and rubber additives.

2. Rubber performance index items:

Physical and mechanical properties: density, hardness, surface resistivity, dielectric properties, tensile properties, impact properties, tear properties, compression properties, adhesive strength, wear resistance, low temperature properties, resilience properties.

Aging performance: thermal aging, ozone aging, ultraviolet lamp aging, salt spray aging, xenon lamp aging, carbon arc lamp aging, halogen lamp aging.

Liquid resistance: lubricating oil, gasoline, engine oil, acids, alkalis, organic solvents, water resistance.

Combustion performance: vertical combustion, alcohol blowtorch combustion, roadway propane combustion, smoke density, combustion rate, effective combustion calorific value, total smoke release.

Applicable performance: hydraulic resistance, pulse test, electrical conductivity, water tightness, air tightness.

Tires, fenders, shoe soles, waterstops, sealing rings, conveyor belts, rubber hoses, cables and wires, automotive interiors, building materials, FMCG rubber rollers, rubber sheets, medical and health rubber products, rubber pressure reducing products, rubber shock absorbing products, etc.

3. Common rubber testing items:

1. Rubber grade evaluation: volatile content, ash content, tensile strength, tensile strength.

2. Production parameters: Mooney viscosity, thermal stability, shear stability, vulcanization curve, Mooney coke burning time.

Natural rubber, silicone rubber, styrene-butadiene rubber, nitrile rubber, ethylene propylene rubber, polyurethane rubber, butyl rubber, fluorine rubber, butadiene rubber, neoprene rubber, isoprene rubber, polysulfide rubber, chlorosulfonated polyethylene rubber, polyacrylate rubber, other rubber.

3. Performance requirements of rubber:

The properties of rubber can be divided into two categories, and structural properties and functional properties, structural properties refer to mechanical properties such as high elasticity and strength;

Functional properties refer to the physical and chemical properties of rubber, such as dielectric resistance, electrical insulation, chemical corrosion resistance, etc.

In rubber products, some mainly use the former type of properties, such as shock-absorbing products, sealing products, etc.; Some mainly use the latter type of performance, such as water sealing (water resistance) and cable sheath (electrical insulation). However, of all the properties, the structural properties, i.e. the mechanical properties, are the most important. Because it's the basis for all performance.

Mechanical properties: Jimen test, hardness, tensile properties, tear properties, compression properties, impact properties, friction properties, fatigue resistance, peel strength, tear off strength, adhesive strength, etc.

Environmental reliability: life assessment, aging test (ultraviolet, xenon lamp, carbon arc lamp, ozone), salt spray test, oil resistance and other liquid test, high and low temperature impact, high and low temperature cycle, etc.

Combustion performance: fire rating, vertical combustion, horizontal combustion, smoke density, oxygen index, flame spread rate, etc.;

Conventional test items include: tensile strength, elongation at break, tensile elastic modulus (Young's modulus), compressive strength, hardness, aging resistance (heat, ultraviolet light, ozone, etc.), surface resistance, volume resistance, abrasion, transparency, haze, gloss, etc.

The test items that are only suitable for plastics include: flexural strength, flexural modulus, heat deflection temperature, Vicat softening point, impact strength, molding shrinkage, etc.

The common ones are: general nature (specific gravity. Density. Moisture content. ash content); mechanical properties (e.g. tensile properties, tensile properties); electrical properties; Thermal performance ( etc.

Melt Index, Melting Point, Density, Low Temperature Resistance, Minimum Service Temperature, Electrical Insulation, Water Absorption, Physical and Mechanical Properties, Impact Strength, Tensile Strength, Vicat Softening Point Temperature, Heat Deflection Temperature, Flame Retardant Properties, Oxygen Index.

GB T 24140 Rubber hoses and pure hoses for air and vacuum systems of internal combustion engines Specification (ISO 11424).

GB T Rubber hoses and pure hoses for fuel lines in internal combustion engines Specification Part 1: Diesel fuel (ISO 19013-1).

GB T Rubber hoses and pure hoses for fuel lines in internal combustion engines Specification Part 2: Gasoline fuel (ISO 19013-2).

Rubber tube inspection:

Physical index: volatile, ash, Mooney viscosity, vulcanization curve, Mooney coke time and other mechanical properties: hardness, tensile properties, tear properties, compression properties, impact properties, friction properties, fatigue resistance, peel strength, adhesive strength and other thermal properties

Vertical combustion, horizontal combustion, smoke density, limiting oxygen index, flame spread rate, thermal stability and other electrical properties: surface resistance, surface resistivity, volume resistance, volume resistivity, breakdown voltage, dielectric strength, dielectric loss, anti-static performance and other weather resistance test: aging test (ultraviolet, xenon lamp, carbon arc lamp, ozone), liquid resistance test, cold and thermal shock and other chemical analysis:

Ingredient analysis, heavy metal testing, RoHS, grade identification, etc.

Rubber tube inspection:

The wide range of applications of the hose determines the special requirements for its performance. Through the early inspection, the potential safety hazards caused by quality problems of the hose can be effectively prevented. STD Testing is a professional rubber tube testing organization, and has developed a number of rapid and accurate testing methods according to relevant standards.

GB T 24140 Rubber hoses and pure hoses for air and vacuum systems of internal combustion engines Specification (ISO 11424).

GB T Rubber hoses and pure hoses for fuel lines in internal combustion engines Specification Part 1: Diesel fuel (ISO 19013-1).

GB T Rubber hoses and pure hoses for fuel lines in internal combustion engines Specification Part 2: Gasoline fuel (ISO 19013-2).

GB T 18948 Rubber Hoses and Pure Hoses for Cooling Systems of Internal Combustion Engines (ISO 4081).

Vulcanization Characteristics, Mooney Viscosity, Mooney Coke, Giman Test, Plasticity, Density, Resistivity, Oxygen Index, Akron, Tensile Strength, Young's Modulus, Brittle Temperature, Tracking Leakage, Volatile Ash, Compression Set, Solid Content, pH Value, Hardness, Compressive Strength, Swelling, Vertical and Horizontal Combustion, Drum Abrasion, Elongation at Break, Resilience, Hot Air Aging, Liquid Resistance, Ash, Salt Spray Test, Artificial Climate Aging, Thermal Conductivity, Voltage Resistance, Dielectric Strength, Dielectric Constant, Loss tangent, leakage current, tracking resistance index.