Технические спецификации Repository: This запись provides a structured reference для interpreting прочность на растяжение и удлинение values on тканый полипропиленовый fabric technical data sheets. It is intended для закупка engineers, project specifiers, и quality assurance teams evaluating woven PP и геотекстильный материал для industrial и civil применения.
Прочность на растяжение & удлинение: Как Read a Тканый материал Data Sheet
A тканый полипропиленовый fabric Technical Data Sheet (TDS) contains a defined set of mechanical Параметр values that determine whether a material is suitable для a given применение. Among these, прочность на растяжение и удлинение at break are two most critical parameters для structural и geotechnical закупка decisions. Misreading or misapplying these values — particularly when comparing results across different test стандарты or specimen orientations — is one of most common источникs of specification error in тканый материал закупка. This запись provides a systematic руководство to reading, interpreting, и applying these values correctly.
- Definitions: Прочность на растяжение и удлинение
- Structure of a Тканый материал Data Sheet
- Warp vs. Weft Direction Values
- Units of Measurement и Reporting Formats
- Tensile & удлинение Reference Table by GSM / г/м²
- Типовой Data Sheet Red Flags
- История изменений
Definitions: Прочность на растяжение и удлинение
Прочность на растяжение is maximum load per unit width that a тканый материал can sustain before rupture under a uniaxial tensile test. для тканые геотекстили и industrial PP fabrics, прочность на растяжение is expressed in kilonewtons per meter (kN/m) и is tested using широкополосный strip method defined by ASTM D4595 or ISO 10319. It is always reported separately для machine direction (warp) и cross-machine direction (weft), as тканые материалы are inherently anisotropic.
удлинение at Break (also called strain at break or ultimate удлинение) is percentage increase in gauge length at point of fabric rupture relative to original gauge length. It is expressed as a percentage (%) и reflects fabric’s deformation behavior under load. Low удлинение values indicate a stiff, inextensible fabric well suited to load transfer применения; high удлинение values indicate a more flexible fabric с greater conformability but reduced stiffness under tension.
These two properties are inversely correlated in тканый PP-материал: as прочность на растяжение increases (обычно through higher GSM / г/м² or tighter weave density), удлинение at break tends to decrease. This trade-off is a fundamental design parameter in геотекстиль engineering.
Structure of a Тканый материал Data Sheet
A properly structured тканый PP-материал Technical Data Sheet will contain following sections, in this order:
- Product Identification: Fabric type, grade designation, GSM / г/м² nominal value, и color.
- Raw Материал: Polymer type (e.g., virgin PP homopolymer), UV stabilizer type и concentration (e.g., HALS at 1.5%), и resin MFI (Melt Flow Index).
- Physical Properties: GSM / г/м² (g/m²), ширина рулона (m), длина рулона (m), и tape width (mm).
- Mechanical Properties: Прочность на растяжение (kN/m) и удлинение at break (%) — both warp и weft directions — с applicable test standard cited.
- Hydraulic Properties (if applicable): Permittivity (sec⁻¹) or проницаемость (m/s) для дренаж и filtration grades.
- Test Стандарт Справочные материалы: Each listed value must cite specific ASTM or ISO method используется to generate it.
- Lot / Batch Identification: Production lot number, manufacturing date, и COA reference number для traceability.
Any TDS that omits test standard reference для mechanical values, or that reports only a single combined tensile value without warp/weft differentiation, should be treated as incomplete и subject to verification before закупка approval.
Warp vs. Weft Direction Values
Woven PP fabric is produced on shuttle or rapier looms where polypropylene tapes are interlaced in two perpendicular directions:
- Warp (Machine Direction / MD): tapes running parallel to length of roll, in direction of fabric production. Warp tapes are held under continuous loom tension during weaving, which обычно results in slightly higher прочность на растяжение и lower удлинение values compared to weft.
- Weft (Cross-Machine Direction / CMD): tapes running perpendicular to длина рулона, inserted by loom shuttle or rapier across warp. Weft tensile values are общиеly slightly lower due to crimp introduced by interlacing geometry.
A correctly specified TDS will always report прочность на растяжение и удлинение independently для both directions. для example:
- Прочность на растяжение (Warp): 45 kN/m | удлинение (Warp): 14%
- Прочность на растяжение (Weft): 40 kN/m | удлинение (Weft): 16%
для geotechnical применения where load is applied primarily in one direction (e.g., slope reinforcement along slope gradient), relevant directional value must be matched to installation orientation. Specifying only a minimum tensile value without defining required direction is a common закупка specification error.
Units of Measurement и Reporting Formats
Прочность на растяжение values для тканые геотекстили appear in several formats depending on test standard и regional market. Закупка teams must confirm which unit applies before comparing values across поставщикs:
- kN/m (kilonewtons per meter): standard unit для широкополосный tensile testing under both ASTM D4595 и ISO 10319. This is correct unit для геотекстиль specification и should be default in all закупка документы.
- N/5cm (newtons per 5 centimeters): A legacy unit still используется by some Asian manufacturers для narrow-strip tensile testing. To convert to kN/m: multiply N/5cm by 0.2 to obtain kN/m.
- kgf/5cm (kilograms-force per 5 centimeters): An older metric unit occasionally appearing on Chinese or South Asian TDS документы. To convert to kN/m: multiply kgf/5cm by 1.962 to obtain kN/m.
- lbf/in (pounds-force per inch): An imperial unit используемый в some Северная Америкаn industrial (non-геотекстиль) fabric specifications. To convert to kN/m: multiply lbf/in by 0.1751 to obtain kN/m.
удлинение is universally reported as a percentage (%) across all стандарты и regional markets, making it more straightforward value to compare directly between поставщикs.
Tensile & удлинение Reference Table by GSM / г/м²
following table provides indicative прочность на растяжение и удлинение диапазонs для virgin polypropylene тканый материал by GSM / г/м² classification. Values are на основе широкополосный метод испытанияology (ASTM D4595 / ISO 10319) и represent типовой диапазонs для standard virgin PP homopolymer fabric without ламинация:
| GSM / г/м² Диапазон | Прочность на растяжение (kN/m) | удлинение at Break (%) | Типовой Применение |
|---|---|---|---|
| 60–90 | 8–15 kN/m | 18–25% | Light почвенное покрытие, nursery |
| 90–120 | 15–25 kN/m | 15–22% | Industrial упаковка, FIBC liners |
| 120–160 | 25–40 kN/m | 12–18% | Road sub-base, разделение грунтовых слоев |
| 160–200 | 40–60 kN/m | 10–15% | Slope стабилизация, контроль эрозии |
| 200+ | 60–100+ kN/m | 8–12% | Highway base, port construction |
Примечание: Values are indicative диапазонs для virgin PP homopolymer тканый материал tested under ASTM D4595 or ISO 10319 широкополосный method. Actual values vary by tape Denier, weave count, и loom tension. Always request a lot-specific COA для закупка verification.
Типовой Data Sheet Red Flags
Когда reviewing a тканый материал TDS from a new поставщик, following conditions should trigger дополнительный verification before закупка approval:
- No test standard cited: Any tensile or удлинение value listed without a referenced Метод испытания (e.g., ASTM D4595 or ISO 10319) cannot be independently verified or compared against other поставщикs.
- Single tensile value only: A TDS that reports one tensile value without warp/weft differentiation suggests either narrow-strip testing or averaged data — neither of which meets геотекстиль specification requirements.
- Unusually low удлинение с high tensile: удлинение values below 8% at any GSM / г/м², combined с high tensile claims, may indicate brittle tape extrusion or recycled resin content that increases stiffness but reduces fatigue resistance.
- Missing lot number or COA reference: A TDS without a traceable batch identifier cannot be verified against physical production records — a critical соответствие gap для ISO 9001-audited закупка.
- Unit inconsistency: A TDS listing tensile values in N/5cm or kgf/5cm alongside ISO standard citations indicates document was not generated from a широкополосный test, making values non-comparable to standard геотекстиль specifications.
История изменений
V1.0 (май 2026 г.): Initial repository запись covering прочность на растяжение и удлинение definitions, TDS structure, warp/weft differentiation, unit conversion reference, GSM / г/м²-indexed performance table, и common data sheet red flags для закупка teams.
Плановая проверка (Q4 2026): Integration of updated ASTM D4595 и ISO 10319 crosshead speed harmonization proposals и recycled PP (rPP) tensile performance benchmarks.
Техническая справкаs: ASTM D4595 (Tensile Properties of геотекстиля by широкополосная Strip Method), ISO 10319 (широкополосная Tensile Test для Geosynthetics), ASTM D5261 (Mass per Unit Area), ISO 9864 (Mass per Unit Area), ISO 9001:2015 Качество Management Systems.
Проверенный ID метаданных: WFR-WIKI-SPEC-003 | май 2026 г.