What items does general plastics testing include?

Mechanical (tensile, flexural, shear, peel, impact), structural (ring stiffness, internal pressure, instantaneous hydraulic burst) and process quality (longitudinal reversion, dichloromethane immersion).

What does the dichloromethane immersion test assess?

The degree of plasticisation and material homogeneity of rigid plastics such as PVC-U, per the relevant product standard.

Which materials are supported?

General plastics including PE, PP, PVC-U and reinforced plastics — pipes, sheets and products.

General Plastics Testing Services

Service Content

General plastic pipes, sheets and products (PE, PP, PVC-U and reinforced plastics) are widely used in water supply and drainage, gas, power sheathing and industrial conveyance, where mechanical strength, impact resistance, ring stiffness, internal-pressure resistance and chemical homogeneity are core to safe use. The LEISA Technology laboratory provides "general-item" third-party testing for plastics, covering mechanical properties such as tensile, flexural, shear, peel and impact, structural properties such as ring stiffness and pressure resistance, and process-quality evaluations such as longitudinal reversion and dichloromethane immersion. Following GB/T, ISO and ASTM standards and equipped with universal testing machines, ring-stiffness testers, constant-temperature hydrostatic systems and immersion apparatus, the laboratory delivers accurate data for incoming inspection, factory testing and quality arbitration.

Test Items

Tensile properties: tensile strength, elongation at break and modulus, per GB/T 1040, ISO 527-2, ASTM D638.
Flexural properties: flexural strength and modulus, per GB/T 1449, ISO 178, ASTM D790.
Shear strength: interlaminar/in-plane shear strength, per GB/T 1450-1, ASTM D3518.
Peel strength: peel bond of composite or coated layers, per the product standard.
External impact resistance: falling-weight resistance to external damage, per the product standard.
Longitudinal reversion: internal stress and processing quality of thermoplastic pipe, per the product standard.
Charpy impact: notched/un-notched impact toughness, per GB/T 1043-1.
Ring stiffness: external-load deformation resistance of buried pipe, per ASTM D2412.
Internal-pressure resistance: long/short-term pressure resistance at specified temperature, per GB/T 15560.
Instantaneous hydraulic burst and pressure test: instantaneous burst pressure and pressure resistance, per ASTM D1599, GB/T 15560.
Dichloromethane immersion: plasticisation/homogeneity of PVC-U etc., per the product standard.

Service Process

Sample receipt and registration: record grade, specification and batch.
Plan confirmation: select test items and conditions per material type and use.
Specimen preparation and conditioning: machine specimens to standard and equilibrate.
Testing: complete mechanical, structural and process-quality tests and record data.
Data processing and review: calculate, judge conformity and review.
Report delivery: issue the report with quality-improvement advice.

Advantages

Complete item set: mechanical, structural and process quality in one stop.
Multi-standard: GB/T, ISO and ASTM for domestic and export needs.
High throughput: standardised process supports high-volume incoming and factory inspection.

Through comprehensive testing of the mechanical, structural and process quality of general plastics, the LEISA Technology laboratory helps producers and buyers quickly identify quality risks in incoming and factory control, safeguarding the strength, sealing and durability of plastic products in long-term use.

Applicable standards: GB/T 1040, GB/T 1449, GB/T 1450-1, GB/T 1043-1, GB/T 15560, ISO 527-2, ASTM D1599, ASTM D2412, ASTM D3518.