Jiangsu Liangwang Technology Co., Ltd., one of the region's established Disposable Plastic Square Box Suppliers, manufactures food-grade disposable packaging at our Zhangjiagang production base. Our Disposable Plastic Square Box range covers microwavable PP square food boxes in 380 ml, 500 ml, 700 ml and 1000 ml formats, produced on German ILLIG thermoforming lines inside a Class 100,000 GMP purification workshop. We supply takeaway chains, central kitchens, catering distributors and food processors that need stackable, leak-resistant square containers with consistent wall thickness and secure lid fit.
Square geometry is not a cosmetic choice. It increases pallet and shelf density, aligns with standard meal-prep portions, and allows multi-compartment layouts without wasting cabinet space. We build the range around those practical constraints, then adjust material, closure and branding to the working point of each project.
What We Manufacture in This Range
Our square box family is part of the broader Eco-friendly Food Container series. The core product is a rigid PP square box with a snap-tight or vented lid, designed for hot fills, microwave reheating and chilled distribution. We also produce matching round bowls, salad bowls and American-style lunch boxes when a project needs a mixed container set from one supplier.
- Microwavable PP square box — 380 ml to 1000 ml, suitable for rice meals, pasta, curries and ready-to-eat dishes.
- Multi-compartment square box — two or three cavities for protein, grain and side dishes in one pack.
- Vented and non-vented lids — steam release for hot food, tight seal for delivery and chilled storage.
- Custom wall thickness — balanced between rigidity, material cost and stackability.
Material and Application Fit
Material selection follows the food, the temperature profile and the end-of-life requirement. PP is our standard choice for hot and microwavable applications because it holds shape at serving temperatures and resists oil and sauce migration. PET and PS serve cold-display and bakery-adjacent uses where clarity matters more than heat resistance. For markets with plastic restrictions, we produce PLA, bagasse, wheat straw and bamboo fiber alternatives through the same tooling and quality process.
| Material |
Best-Fit Application |
Temperature Profile |
Closure Options |
| PP |
Hot meals, microwave reheat, takeaway |
Hot fill and reheat |
Snap lid, vented lid, film seal |
| PET |
Cold salads, fruit, chilled display |
Chilled and ambient |
Snap lid, anti-fog lid |
| PLA / bagasse / wheat straw |
Plastic-restricted markets, cold and warm food |
Warm and chilled |
Snap lid, paper lid |
| PS |
Bakery, dry snacks, cold desserts |
Ambient and chilled |
Lid, dome lid |
Critical Specifications We Confirm Before Tooling
Square boxes fail in service for predictable reasons: lids that crack after repeated opening, bases that flex under a full load, or corners that thin out during thermoforming. We lock the following parameters before releasing a mold, because they determine whether the box survives the delivery route and the microwave.
- Nominal volume and usable fill — measured to a defined fill line, not to the brim.
- Base and corner wall thickness — controlled to resist flexing and corner cracking.
- Lid engagement force — tight enough to resist transport vibration, releasable by hand.
- Stacking load — how many filled boxes can be stacked without lid deformation.
- Leak resistance — verified with oil and water at the intended fill temperature.
- Microwave performance — shape retention and no warping after the specified reheat cycle.
Configuration Options for Your Line
We configure each square box around the filling, sealing and distribution method already in place. That includes the mold, the lid format and the surface treatment. Our ODM/OEM process runs from needs communication through solution concept, mold manufacturing, sample testing, mass production and final quality control, so changes are validated on samples before they reach the line.
- Lid systems — snap-on lid, vented lid, easy-peel film, or no lid for film-seal lines.
- Compartments — single, two or three cavities with controlled partition height.
- Surface finish — matte, high-gloss, pearlescent, frosted or embossed.
- Branding — in-mold labeling, embossing and logo printing for integrated brand presentation.
- Colour — natural, black, white or matched to a brand palette.
Capacity, Quality Control and Compliance
Our ODM/OEM Factory runs a planned annual production capacity of 20,000 tons, supported by German ILLIG thermoforming equipment and flip mold cup machines. Production takes place in a Class 100,000 GMP purification workshop with an on-site laboratory, which allows us to check dimensions, wall thickness and seal integrity during the run rather than only at final inspection. Management systems include ISO9001, ISO14001, ISO45001, ISO22000 and BRC Grade A, with FDA certification covering the food-contact requirements of our export markets.
For projects that need a different container format alongside the square box, we supply the full food packaging container range, including Disposable Plastic Round Bowl and Disposable Plastic Salad Bowl formats, so a single delivery can cover an entire menu.
Installation, Handling and Maintenance Notes
Square boxes are supplied nested and sleeved for automatic denesting or manual handling. We confirm the denesting force and stack height so the box feeds reliably on high-speed filling lines without jamming. For film-seal applications, we match the sealing window to the lidstock and the filling temperature. Storage guidance, pallet configuration and carton counts are documented per SKU.
- Nesting and denesting force matched to the filling equipment.
- Sealing temperature and dwell window for film-seal lines.
- Pallet pattern and carton count for warehouse and transport planning.
- Spare mold and tooling support for repeat orders.
Information We Use to Configure Your Solution
A square box proposal is only as good as the inputs behind it. We prepare the configuration and quotation from the following project data, and we confirm the working point with samples before mass production.
| Input |
Why It Matters |
| Food type and fill weight |
Determines volume, wall thickness and base rigidity. |
| Fill and reheat temperature |
Selects PP, PET, PS or a bio-based material. |
| Lid or film-seal method |
Defines the closure geometry and sealing window. |
| Compartment layout |
Sets partition height and usable cavity volume. |
| Branding and surface finish |
Drives mold texture, IML or printing method. |
| Order quantity and delivery schedule |
Confirms MOQ, tooling plan and production slot. |
Frequently Asked Questions
What sizes are available in the square box range?
Our standard microwavable PP square boxes are produced in 380 ml, 500 ml, 700 ml and 1000 ml formats. Custom volumes and compartment layouts are available through mold development.
Can the square box be used in a microwave?
Yes. The PP square box is designed for hot fills and microwave reheating. We verify shape retention and lid fit after the reheat cycle specified for your application.
Do you offer custom branding on the lid or base?
We support in-mold labeling, embossing and logo printing, along with matte, gloss, pearlescent and textured finishes. Branding is confirmed during sample testing before mass production.
What is the minimum order quantity?
Our MOQ is 5000 pcs. For custom molds, the tooling plan and order quantity are agreed together so the first production run matches your launch schedule.
Which certifications apply to this product?
Our management systems include ISO9001, ISO14001, ISO45001, ISO22000 and BRC Grade A, with FDA certification for food-contact compliance. Documentation is provided with the order.
How long does delivery take?
Standard delivery is generally 15–30 days after order confirmation. Small batch orders can be completed within half a month. We confirm the schedule against the agreed specification and quantity.
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