Wankai WK-811L is a high-performance, bottle-grade polyethylene terephthalate (PET) resin. This resin offers high molecular weight, excellent transparency, low acetaldehyde (AA) content, superior mechanical properties, and stable processing performance. WK-811L is specifically designed for bottle and packaging applications such as carbonated beverage bottles, mineral water bottles, juice bottles, edible oil containers, and cosmetic packaging, where high clarity and hygiene standards are critical.
Its low AA content preserves the natural flavor of beverages, while high viscosity and strength ensure excellent pressure and impact resistance during filling, transport, and use.

Parameter
Unit
Value
Test method
Intrinsic Viscosity
dL/g
0.760±0.015
Q/WK007
Acetaldehyde Content
μg/g
≤1.0
Q/WK007
Color (L-value)
—
≥83.0
Q/WK007
Color (b-value)
—
≤-0.5
Q/WK007
Peak Temperature when Melting（DSC by Nitrogen）
°C
251± 2
Q/WK007
Moisture Content
%
≤0.20
Q/WK007

Performance Features and Advantages

  • Low Acetaldehyde Content. WK-811L maintains the natural flavor of beverages without off-odor or taste alteration.
  • High Transparency and Gloss. Low b-value ensures clear, bright bottles with excellent visual appeal.
  • Superior Mechanical Performance. High tensile strength, impact resistance, and stress-crack resistance ensure bottle stability during production, transport, and use.
  • Excellent Processability. Balanced melt viscosity and crystallization rate make it suitable for high-speed injection molding and stretch blow molding (ISBM), producing uniform wall thickness and consistent quality.
  • Safe and Environmentally Friendly. Non-toxic, odorless, and fully recyclable; compliant with FDA and EFSA food-contact standards.

Main Applications of Wankai WK-811L

Wankai WK-811L PET resin is widely used in high-transparency, high-strength bottle and packaging products, including:

  • Beverage Bottles: Carbonated drinks, mineral water, purified water, juices
  • Food Packaging: Edible oil bottles, sauces, and condiments
  • Personal Care & Household Products: Shampoo, detergent, and cosmetic bottles
  • Industrial & Medical Packaging: Pharmaceutical and chemical liquid containers
  • Other Uses: PET sheets, strapping, and thermoformed packaging materials

Processing Recommendations

Proper drying is essential due to PET’s hygroscopic nature, to prevent hydrolytic degradation and maintain mechanical properties:

  • Drying Temperature: 165 ± 5 °C
  • Drying Time: 4–6 hours
  • Final Moisture Content: ≤ 0.005 %
  • Injection Molding Temperature: 270–285 °C
  • Mold Temperature: 20–30 °C
  • Stretch Blow Molding Temperature: 95–110 °C

Correct drying and precise temperature control are critical for achieving optimal clarity, gloss, and strength.

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