Yangzhou, China – April 25, 2026 – Jiangsu Compound, a professional manufacturer of plastic sheets and a specialist in thermoforming solutions headquartered in Yangzhou, Jiangsu, today announced the successful completion of a product shrinkage test for its high-density polyethylene (HDPE) sheet. The test result – a post‑cooling shrinkage rate of exactly 2% – confirms full compliance with product specifications and demonstrates the company's process reliability for large‑format thermoformed parts.
Shrinkage test details
Original mold dimension: 1200 mm
Dimension immediately after forming: 1176 mm
Dimension after full cooling: 1172 mm
Shrinkage calculation = (1200 – 1172) / 1200 × 100% = 2%
"Consistent shrinkage control is the foundation of precision thermoforming, especially for parts approaching 1200 mm in length," said a senior process engineer at Jiangsu Compound. "Our achieved 2% rate meets the strictest customer standards and minimises post‑moulding trimming or rework."
Jiangsu Compound's production capabilities
The company operates advanced extrusion and thermoforming lines capable of producing sheets in:
Width range: up to 2750 mm (industry‑leading for many thermoformed applications)
Thickness range: 0.8 mm to 15 mm (covering light‑duty to heavy‑duty industrial needs)
Materials: HDPE, ABS, PP, and other thermoplastics, with custom formulations (UV‑stabilised, flame‑retardant, anti‑static, etc.)
Key advantages of HDPE sheets (density 0.98 g/cm³)
Excellent chemical resistance – resists most acids, alkalis, alcohols and solvents.
High impact strength – retains toughness even at sub‑zero temperatures (down to -40°C).
Very low moisture absorption – ideal for water tanks, marine parts, and outdoor applications.
Lightweight – lower density (0.98) makes for easier handling and lower shipping costs.
Food contact safe – complies with FDA and EU regulations.
Cost‑effective – offers a favourable performance‑to‑price ratio for large‑volume production.
Key advantages of ABS sheets (density 1.06 g/cm³)
High gloss & smooth surface – excellent for painting, printing, vacuum metallising or direct decorative finishes.
Superior stiffness & dimensional stability – higher tensile modulus than HDPE; less creep under sustained load.
Good impact resistance – particularly at room temperature.
Easy secondary processing – can be glued, welded, machined or drilled with standard tools.
Attractive appearance – ideal for visible consumer‑facing parts.
HDPE vs. ABS – Side‑by‑side comparison
| Property | HDPE | ABS |
|---|---|---|
| Density (g/cm³) | 0.98 (lighter) | 1.06 (heavier) |
| Flexibility | Semi‑flexible, ductile | Rigid, less bending before fracture |
| Chemical resistance | Excellent (resists most acids/solvents) | Poor (attacked by acetone, esters, strong oxidizers) |
| Moisture resistance | Very low water absorption | Moderate absorption (can affect dimensional stability in wet environments) |
| Surface appearance | Waxy, matte finish | High gloss, paintable, printable |
| UV resistance (unmodified) | Poor – requires UV stabilisers for outdoor use | Poor – yellows quickly outdoors; needs coating |
| Low‑temperature toughness | Excellent (down to -40°C) | Fair (becomes brittle below -20°C) |
| Typical applications | Water tanks, cutting boards, chemical liners, outdoor piping, aquaculture equipment | Automotive interior parts, luggage shells, toys, electronic housings, point‑of‑sale displays |
Selection guidance from Jiangsu Compound
Choose HDPE when the end product demands chemical exposure, outdoor humidity, low‑temperature impact resistance, or food contact – while keeping weight and cost low.
Choose ABS when the requirement is a glossy, aesthetic surface, high rigidity, easy gluing/painting, and tight dimensional stability at room temperature.
About Jiangsu Compound
Jiangsu Compound is an ISO 9001:2025 certified enterprise specialising in plastic sheet extrusion and professional thermoforming services. With a modern factory in Yangzhou, the company serves automotive, logistics, construction, agriculture, retail display, and water treatment markets worldwide. The ability to produce sheets up to 2750 mm wide and from 0.8 to 15 mm thick enables customers to consolidate large parts without joining, reducing assembly cost and improving product integrity.
For more information, to request material samples, or to discuss a custom thermoforming project, please contact the Jiangsu Compound sales engineering team.