Cotton Interlining Fabric Testing

Cotton interlining fabric is a garment‑accessory material mainly made of cotton fiber and processed by special techniques. It is usually coated with hot‑melt adhesive or other binders. During garment manufacturing, it bonds with shell fabrics by ironing to realize reinforcement, shaping and supporting functions. Featuring excellent air permeability, moisture absorption and soft hand‑feel, cotton interlining is an indispensable auxiliary material in apparel production.

Cotton interlining fabric is widely used in suits, coats, shirts, dresses, trousers and other garments for collars, cuffs, fly plackets, pocket openings, hems and other positions. It provides stiffness and shape retention, improves overall appearance and wearing performance, and enhances strength and durability of partial garment areas.

Cotton interlining testing covers appearance quality, physical performance, chemical properties and safety performance. Tests are implemented according to national and industrial standards. Systematic evaluation on fabric structure, bonding strength, dimensional stability, color fastness and harmful‑substance content ensures compliance with garment‑manufacturing requirements and protects consumer interests.

Test Scope

1. Woven cotton interlining fabric

2. Knitted cotton interlining fabric

3. Non‑woven cotton interlining fabric

4. Bonded cotton interlining fabric

5. Hot‑melt cotton interlining fabric

6. Cotton interlining for shirts

7. Cotton interlining for outer‑wear

8. Cotton interlining for silk garments

9. Cotton interlining for fur garments

10. Light‑weight cotton interlining fabric

11. Medium‑weight cotton interlining fabric

12. Heavy‑weight cotton interlining fabric

13. White cotton interlining fabric

14. Dyed cotton interlining fabric

15. Bleached cotton interlining fabric

16. Resin‑treated cotton interlining fabric

17. Carbon‑filled cotton interlining fabric

18. Strip inserting cotton interlining fabric

19. Collar cotton interlining fabric

20. Cuff cotton interlining fabric

Test Items

1. Bonding Strength: Measure bonding force between cotton interlining and shell fabric to characterize adhesive performance.

2. Peel Strength: Detect force required for separation between adhesive layer and base fabric to evaluate bonding fastness.

3. Wash Dimensional Change Rate: Test shrinkage or elongation after washing and assess dimensional stability.

4. Dry‑heat Dimensional Change Rate: Measure dimensional variation under dry‑heat condition and reflect thermal stability.

5. Steaming Dimensional Change Rate: Evaluate dimensional change after steaming treatment.

6. Appearance Change After Washing: Inspect wrinkle, blister and other surface defects after washing.

7. Appearance Change After Dry‑cleaning: Check appearance retention performance after dry‑cleaning treatment.

8. Breaking Strength: Measure maximum load the specimen can bear before tensile fracture.

9. Tearing Strength: Assess resistance against tear propagation.

10. Adhesive Penetration Performance: Detect hot‑melt adhesive bleed‑through which may impair surface appearance.

11. Free Formaldehyde Content: Test residual free formaldehyde related to human‑body health safety.

12. pH Value: Measure acidity‑alkalinity and evaluate skin irritation risk.

13. Color Fastness: Assess color retention capacity under various service conditions.

14. Color Fastness to Water: Detect fading and staining under water‑immersion condition.

15. Color Fastness to Perspiration: Evaluate color stability exposed to sweat.

16. Color Fastness to Rubbing: Test color loss caused by friction action.

17. Color Fastness to Dry‑cleaning: Inspect color retention under dry‑cleaning condition.

18. Decomposable Carcinogenic Aromatic Amine Dyes: Screen banned harmful dye components.

19. Heavy Metal Content: Detect residual lead, cadmium and other heavy‑metal elements.

20. Mass Per Unit Area: Weight per square meter, reflecting fabric thickness and density.

21. Thickness: Measure specimen thickness, influencing hand‑feel and application effect.

22. Fabric Width: Detect effective usable width dimension of interlining.

Applicable Standards

1. Visual inspection: Evaluate surface defects, stains and damages under standard light source by visual observation.

2. Bonding strength test: Bond specimen with standard shell fabric, test peel force via tensile testing machine.

3. Washing dimensional change test: Measure dimension before and after washing under specified condition and calculate change rate.

4. Dry‑heat shrinkage test: Treat specimens at high temperature and record dimensional variation.

5. Color fastness test: Attach specimen with standard adjacent fabric, grade color change and staining after specified treatment.

6. Formaldehyde content test: Acetylacetone spectrophotometry or liquid chromatography for formaldehyde quantification.

7. pH value test: Prepare aqueous extract of sample and measure pH with pH meter.

8. Heavy‑metal test: Atomic absorption spectrometry or ICP‑MS for heavy‑metal determination.

9. Banned azo‑dye test: GC‑MS method for decomposable aromatic amine detection.

10. Mass per unit area test: Cut specimens of defined size, weigh and calculate areal density.

Test Instruments

1. Electronic Textile Strength Tester

2. Fabric Tear Strength Tester

3. Fabric Flat Abrasion Tester

4. Pilling Tester

5. Shrinkage Tester

6. Hot‑press Bonding Strength Tester

7. Peel Strength Tester

8. Spectrophotometer

9. pH Meter

10. Gas Chromatograph

11. Liquid Chromatograph

12. Atomic Absorption Spectrometer

Notes

1. Bond‑related tests shall strictly follow actual ironing temperature, pressure and time parameters consistent with garment production process.

2. For peel‑strength specimens, avoid contaminating bonding surface with dust and oil before hot‑press lamination.

3. Washing and dry‑cleaning appearance assessment shall focus on blistering, delamination and edge curling of bonded interlining.

4. Adhesive‑penetration observation shall be performed from both front and reverse sides of composite samples.

5. Chemical safety testing samples shall remove surface floating impurities to prevent interference on test results.

6. Different‑thickness interlinings shall select proper fixture and test load for tensile and peel tests.

Summary

As a critical auxiliary material for garment manufacturing, cotton interlining fabric directly determines overall garment quality and wearing experience. Standardized testing services help enterprises control product quality, reduce production risks and strengthen market competitiveness. Laboratories equipped with complete instruments and professional technicians can deliver accurate and objective test data, support process optimization for manufacturers, and ensure products satisfy corresponding quality specifications and safety standards.