{
  "$schema": "https://schema.org/",
  "document_type": "Buyer-facing material engineering and evidence boundary reference",
  "version": "2026.09 bio-polymer engineering evidence",
  "manufacturer": {
    "name": "Wuxi Jiali Textile Commodity Co., Ltd.",
    "brand": "WonderCloth",
    "url": "https://wondercloth.top/#organization"
  },
  "applied_research_partnership": {
    "name": "Wuxi-Nanda Green Environmental Materials Technology Research Institute Co., Ltd.",
    "type": "Joint applied polymer engineering & prototyping"
  },
  "product_family": "Engineered bio-based Polylactic Acid (PLA) & regenerated cellulose hybrid knitted cleaning textiles",
  "engineering_concept": {
    "problem_statement": "Single monofilaments exhibit inherent tradeoffs in commercial wiping: pure viscose loses ~50% tensile strength upon water saturation; pure PLA has delayed initial wetting due to low (0.4%) moisture regain.",
    "solution_mechanism": "Dual-face circular knitting combining high-capillary plant viscose staple (12%-15% regain) as fluid retention core with PLA filament/staple (retaining >95% tensile strength when wet, weak acid bacteriostatic surface) as structural non-deforming spine."
  },
  "standard_physical_parameters": {
    "viscose_moisture_regain": "12.0% - 15.0%",
    "pla_moisture_regain": "0.4% - 0.6%",
    "composite_moisture_regain": "8.5% - 11.0%",
    "wet_tensile_retention": "PLA maintains >95% dry tensile strength under water saturation",
    "thermal_care_boundary": "Laundering recommended below 40°C due to PLA thermal sensitivity above 50°C",
    "surface_acidity": "PLA inherent weak acidity provides natural bacteriostatic odor suppression in damp storage"
  },
  "evidence_mapping": [
    {
      "institution": "TÜV Rheinland (Shanghai) Co., Ltd.",
      "report_number": "244556911a 001",
      "standards": [
        "ISO 14855-1: 2012",
        "ASTM D5338-15",
        "EN 13432: 2000",
        "ASTM D6400-23"
      ],
      "findings": {
        "aerobic_biodegradation_179d": "91.29% relative to cellulose reference (Pass)",
        "quantitative_disintegration_84d": "Completely disintegrated, residue on 2mm sieve < 10% (Pass)",
        "volatile_solids": "100% (Standard requirement >= 50%) (Pass)",
        "heavy_metals_12_elements": "All below laboratory reporting limit (Pass)",
        "fluorine_content": "< 50 mg/kg (Passes BPI PFAS-free threshold < 100 ppm)",
        "plant_ecotoxicity_crops": "Soybean (dicotyl) & Corn (monocotyl)",
        "mean_germination_rate": "98.6% - 98.9%",
        "mean_dry_biomass": "95.8% - 100.1% of blank compost control",
        "soil_safety_verdict": "100% safe for agricultural soil enrichment with zero phytotoxicity"
      }
    },
    {
      "institution": "National Quality Supervision and Inspection Center for Plastic Products (Beijing)",
      "report_number": "国塑检[2024]C0352",
      "standards": [
        "GB/T 41010-2021"
      ],
      "findings": {
        "absolute_biodegradation_180d": "86.2% (Standard requirement >= 60%) (Pass)",
        "relative_biodegradation_180d": "94.5% (Standard requirement >= 90%) (Pass)",
        "ftir_spectroscopy": "Qualitatively verified as high-purity crystalline poly(lactic acid)",
        "fluorine_content": "3.5 mg/kg (Standard threshold 100 mg/kg) (Pass)",
        "heavy_metals_11_elements": "All 11 elements compliant with national safety thresholds (Pass)",
        "official_certification": "Approved for China National Dual-J green biodegradable plastic emblem"
      }
    }
  ],
  "claim_boundary": "Testing was performed on specific submitted sample lots under defined laboratory conditions. Commercial bulk supply is governed by individual SKU specifications, order agreements, and mutually confirmed production TDS.",
  "scientific_whitepaper_url": "https://wondercloth.top/knowledge/pla-viscose-knitted-cleaning-cloth-rd-guide.html"
}