What are the main materials of Trailer Bag

      Trailer bags are divided into six categories: main fabric, bottom wear-resistant layer, lining/interlayer, bottom plate, wheel set, and auxiliary materials. Selection logic: The main fabric prioritizes durability and tear resistance; Key anti abrasion, waterproof, and puncture measures at the bottom; The bottom plate determines the full load configuration; Wheel set is a consumable core; Ribbons, zippers, corner protectors, and other accessories determine the service life of the stress location. Outdoor camping heavy-duty model uses high-D polyester Oxford cloth+PVC knife scraping bottom; Ordinary travel styles can use 600D/900D Oxford cloth.

1. Body main fabric (core)

1. Polyester Oxford cloth (mainstream)

      Specifications: 600D/900D/1200D/1680D, the higher the D number, the thicker the yarn, and the stronger the wear and tear resistance. Apply PU/PVC coating on the surface to prevent water splashing. **1680D is the standard material for outdoor heavy-duty trailer bags.

2. Nylon (nylon) Oxford cloth

      Better toughness, softer hand feel, and better wear resistance than the same D polyester; The cost is higher, which is mostly used for high-end models, and the outdoor aging resistance is better.

3. Canvas (cotton/polyester cotton)

      The texture is stiff and wear-resistant, but it has poor waterproofing and a relatively large weight, making it rarely used for heavy-duty trailer bags.

4. PVC coated cloth/knife scraping cloth

      Mostly used for fully waterproof special trailer bags, with a heavy weight and strong puncture resistance.

2. Bottom wear-resistant layer (in direct contact with the ground, wears out the fastest)

      1. PVC knife scraper cloth: The bottom of high-end trailer bags in the industry comes standard, waterproof, resistant to sand and gravel friction, puncture resistant, and can be wiped directly if dirty.

      2.  Thickened PVC composite Oxford cloth : Economical bottom, less wear-resistant than knife scraping cloth.

      3. Rubber Bottom Patch: Local rubber corner protectors at the four corners to prevent bumps, usually used together with a scraper cloth.

3. Inner lining and interlayer filling

      Lining: 210D polyester Oxford fabric, lightweight, used for lining.

      Pearl cotton/EVA foam: intermediate layer, cushioning and anti-collision, protecting internal equipment, generally with a thickness of 3-8mm.

      Non woven fabric: low-priced lining, not wear-resistant.

4. Bottom plate (maintaining package shape, carrying core)

      1. PE plastic board (most commonly used) : lightweight, bendable, removable, easy to fold and store; Good toughness and moisture resistance.

      2. PVC cardboard/composite hard sheet: Low cost, disadvantage: easily softened by moisture, only suitable for light loads.

      3. PP plastic board: More rigid, resistant to bending, suitable for heavy-duty use, with slightly higher self weight.

      The high-end models will have segmented bottom plates that balance load-bearing and folding.

5. Material of wheels and wheel seats

      1. Wheel surface: TPU rubber wheel (quiet and wear-resistant, preferred for outdoor gravel roads) ; PP hard plastic wheels (cheap, noisy, fragile, only suitable for flat road surfaces); PVC wheel (middle end).

      2. Bearings: Ordinary iron bearings/stainless steel ball bearings (waterproof and rust proof, outdoor models for foreign trade).

      3. Wheel seat bracket: PP/ABS plastic; Reinforced with metal steel rivets.