Wankai WK-821 PET Resin for Edible Oil Bottles

Wankai WK‑821 is a premium bottle-grade polyethylene terephthalate (PET) resin. It is a TPA-based homopolymer PET designed for applications requiring high transparency, chemical resistance, and excellent barrier performance. WK‑821 PET chips can be widely used for edible oil bottles, premium liquor bottles, pharmaceutical containers, carbonated beverage bottles, and APET sheets. This resin combines high molecular weight, excellent clarity, low acetaldehyde content, and strong chemical resistance, making it suitable for high-quality packaging applications where visual appearance, durability, and product safety are critical.

Parameter	Unit	Value	Test Method
Intrinsic Viscosity	dL/g	0.830±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	245± 2	Q/WK007
Moisture Content	%	≤0.20	Q/WK007

Main Characteristics of Wankai WK‑821

High Transparency and Gloss. Produces bottles and sheets with clear, bright, and visually appealing surfaces.
Low Acetaldehyde (AA) Content. Ensures that beverages, oils, and other products maintain natural taste and aroma.
Strong Chemical Resistance & Barrier Performance. Suitable for edible oils, alcoholic beverages, pharmaceuticals, and other chemically sensitive liquids.
Excellent Processing Stability. Compatible with blow molding, injection molding, and sheet extrusion; ensures consistent quality and minimal degradation.
Food-Contact Compliance. Engineered for safe use in packaging consumables and pharmaceuticals.

Typical Applications

WK‑821 is optimized for high-quality packaging, including:

Edible oil bottles – resistant to chemical degradation, maintains clarity and barrier performance
Premium liquor and pharmaceutical bottles – provides high transparency and aesthetic appeal
Carbonated beverage bottles – maintains shape and clarity under internal pressure
APET sheets – for transparent packaging, trays, and thermoformed containers
General bottle-grade applications – for products requiring high strength, clarity, and chemical resistance

Selection Considerations

When selecting Wankai WK‑821 or comparing with other PET resin, key factors include:

Main Factors	WK-821 Advantage
Intrinsic Viscosity (I.V.)	≈ 0.83 dl/g for strength, heat resistance, and barrier performance
Acetaldehyde (AA)	≤ 1 ppm, maintaining product taste and odor
Color/Clarity	L ≥ 83, B ≤ -0.5 for high transparency and aesthetic appeal
Chemical Resistance & Barrier	High resistance suitable for edible oils, alcoholic beverages, pharmaceuticals.
Processing Performance	Excellent compatibility with blow molding, injection molding, and sheet extrusion.
Application Suitability	Ideal for high-end edible oil bottles, liquor bottles, pharma bottles, carbonated beverages, and APET sheets.