Ecoleaderpack supplies cornstarch food boxes with tab-lock and flip-top hinged closure options for restaurants, delivery kitchens, caterers, distributors and private-label food-packaging programs.
The 6x6 family provides compact formats for burgers, sandwiches, bakery items, snacks and side dishes. Multiple depth and footprint options help buyers match different bun sizes and portion heights without moving to an oversized lunch box.
Long rectangular boxes suit hot dogs, rolls, sandwiches and narrow prepared foods. Buyers should confirm the food length, topping height and holding method when selecting between the available footprints.
The 8x8 family is available in one, two and three-compartment layouts. It is a practical route for rice, noodles, pasta, salads and standard restaurant lunch portions.
The 9x9 family provides more space for large portions and meal combinations. One-compartment versions maximize the open food area, while three-compartment versions keep the main dish and sides separated.
Ecoleaderpack supplies both closure structures within the cornstarch food-box range. Tab-lock boxes use a molded insert tab and matching slot, while flip-top hinged boxes fold the integrated lid over the base and close through the molded rim. The selected size, compartment layout and approved sample determine the final closure geometry.
| Closure option | How it closes | Packing advantage | Details to confirm |
|---|---|---|---|
| Tab-Lock Closure (Insert-Tab) | The molded tab is inserted into the matching slot and pressed into its locking position | Gives packing staff a visible engagement point when closing each box | Tab and slot position, food fill height, closing pressure and stacking test |
| Flip-Top Hinged Closure | The integrated lid folds over the hinge and the molded rim is pressed into place | Supports quick one-piece handling without matching a separate lid | Hinge movement, rim alignment, food fill height and repeat closing test |
Final dimensions, weight tolerances and packing are confirmed against the selected product and approved sample. Specify Tab-Lock Closure or Flip-Top Hinged Closure in the inquiry so Ecoleaderpack can match the size to the required closing structure.
| Size Family | Dimensions (mm) | Compartments | Unit Weight | Carton Packing | Recommended Application |
|---|---|---|---|---|---|
| Compact 6x6 | 145 x 145 x 75 | 1 | 26 +/- 2 g | 500 pcs | Burgers, snacks and small meals |
| Compact 6x6 | 150 x 161 x 65 | 1 | 22 +/- 2 g | 500 pcs | Sandwiches and takeaway portions |
| Deep 6x6 | 155 x 155 x 80 | 1 | 22 +/- 2 g | 500 pcs | Taller burgers and deeper portions |
| 7x5 rectangular | 185 x 135 x 50 | 1 | 28 +/- 2 g | 600 pcs | Light meals, bakery and side dishes |
| 8x8 standard | 205 x 205 x 70 | 1 or 3 | 52 +/- 2 g | 150 pcs | Rice, noodles and combo meals |
| 8x8 alternative | 205 x 200 x 70 | 1 or 3 | 40 +/- 2 g | 200 pcs | Takeaway lunch and meal prep |
| 8x8 alternative | 202 x 212 x 70 | 1 or 3 | 44 +/- 2 g | 150 pcs | Full lunch portions |
| Rectangular box | 200 x 155 x 60 | 2 | 30 +/- 2 g | 300 pcs | Main dish and side separation |
| Hot dog box | 218 x 125 x 75 | 1 | 25 +/- 2 g | 500 pcs | Hot dogs, rolls and long sandwiches |
| Long meal box | 240 x 150 x 65 | 1 | 48 +/- 2 g | 200 pcs | Noodles, rice and prepared meals |
| Long meal box | 240 x 175 x 65 | 2 | 48 +/- 2 g | 200 pcs | Main dish with side portion |
| Hot dog box | 226 x 161 x 65 | 1 | 36 +/- 2 g | 150 pcs | Larger rolls and topped foods |
| 9x9 standard | 235 x 235 x 75 | 1 or 3 | 63 +/- 2 g | 150 pcs | Large takeaway and combo meals |
| 9x9 alternative | 226 x 236 x 70 | 1 or 3 | 54 +/- 2 g | 150 pcs | Meal prep and delivery menus |
A box that looks correct by nominal inch size can still perform differently with the actual meal. Fill height affects lid closure, compartment walls affect usable space, and toppings or side dishes can change how the box stacks in a delivery bag.
Before bulk ordering, test the sample with the real portion, closing pressure, holding time and transport method. Ecoleaderpack can provide several nearby size options when the food dimensions fall between standard formats.
Ecoleaderpack cornstarch clamshell boxes are built for takeaway and delivery operations where heat, moisture and transport handling directly affect packaging performance. The material maintains a stable structure from approximately -10°C to 120°C, making the boxes suitable for refrigerated foods, room-temperature meals and a wide range of hot dishes.
Their molded surface resists oil and moisture from greasy foods, sauces and dressings. Reinforced rims, integrated hinges and rigid bases help the boxes retain their shape during filling, stacking and delivery, including heavier meals such as rice, noodles, burgers and grilled foods.
Suitable for chilled food, room-temperature service and hot takeaway meals across restaurants, catering and meal-delivery programs.
The dense, smooth surface helps limit oil and moisture penetration when packing saucy, greasy or high-moisture foods.
The boxes support short-time microwave reheating and freezer storage, allowing the same packaging format to serve hot and cold food programs.
Reinforced edges, a stable base and an integrated hinged lid support stacking, closing and transport without easily collapsing or deforming.
Cornstarch clamshell boxes are a practical choice for buyers who want the smooth finish and handling of conventional plastic packaging together with strong heat resistance, oil resistance and commercial compostability.
| Feature | 🌽 Cornstarch | 🌿 Bagasse | PP / PET | EPS Foam |
|---|---|---|---|---|
| Renewable Feedstock | 🟢 Plant-Based | 🟢 Plant-Based | 🔴 Fossil-Based | 🔴 Fossil-Based |
| Compostability | 🟢 Industrial* | 🟢 Certified Conditions* | 🔴 No | 🔴 No |
| Heat Resistance | 🟢 Up to 120°C* | 🟢 Up to 120°C* | 🟡 Varies | 🟡 Limited |
| Oil Resistance | 🟢 Excellent | 🟡 Good | 🟢 Excellent | 🟡 Moderate |
| Microwave Use | 🟢 Short Reheating* | 🟢 Short Reheating* | 🟡 PP Only* | 🔴 Not Recommended |
| Rigidity | 🟢 High | 🟡 Good | 🟢 High | 🔴 Low |
| Material Appearance | 🟢 Smooth & Premium | Natural Fiber | Conventional Plastic | Foam Texture |
| Best For | Bowls, Plates, Trays & Cutlery | Plates & Clamshells | Hot/Cold Packaging | Low-Cost Packaging |
| Overall Positioning | ⭐ Best Balance | Eco Fiber Choice | Conventional Choice | Basic Choice |
* Performance varies by product formulation, thickness and intended use. Compostability and microwave suitability should be confirmed through the relevant product certification and test reports.
Standard clamshell orders start from 50,000 pieces per item. Custom projects start from 100,000 pieces per specification or design. Each custom size, compartment format or branded packing design is reviewed as an individual order item before production.
| Custom area | Available options |
|---|---|
| Product dimensions | Custom length, width, height and cavity depth based on the required meal portion or reference sample |
| Compartment layout | One, two or three compartments, with the compartment position and portion space confirmed in the product drawing |
| Closure structure | Tab-lock insert closure or flip-top hinged closure, confirmed against the selected size, drawing and approved sample |
| Logo embossing | Molded logo on the lid or selected product area, with the position, size and orientation approved before mass production |
| Inner and retail packing | Inner bags, printed inner or outer packs, retail packs, product labels and barcode labels based on the supplied packing design |
| Export cartons | Quantity per carton, custom-printed carton artwork, carton labels and shipping marks for distributor or private-label orders |
Cornstarch clamshell boxes follow the sheet extrusion and thermoforming route. Depending on the approved design, the mold forms the base, lid, hinge, insert tab, matching slot or rim-lock features as one coordinated structure.
| Stage | What Happens | Clamshell-Specific Check |
|---|---|---|
| 1. Material preparation | The approved cornstarch-based masterbatch is dried, blended and prepared for sheet production. | Material lot, color and approved formulation |
| 2. Sheet extrusion | Material is extruded into controlled sheet or roll stock. | Sheet gauge and surface consistency |
| 3. Thermoforming | Heated sheet is drawn into a mold that forms the base, lid and selected closure features. | Tab and slot alignment or hinge movement, rim alignment and closure geometry |
| 4. Trimming and closure testing | The perimeter is trimmed before opening, closing, stacking and visual checks. | Insert-tab engagement or flip-top closure, lid alignment, edges and repeat closing |
| 5. Packing | Approved boxes are nested, counted and protected in export cartons. | Stack shape, unit count and compression protection |
Clean edge trim, forming skeletons and rejected boxes are kept separate from contaminated material. Suitable scrap is routed to controlled reprocessing or qualified recycling where the formulation and product requirements permit; other residues follow controlled handling requirements.
References: CN113308028A, the NatureWorks extrusion and thermoforming route and the US EPA materials management hierarchy. These are general process references rather than the exact commercial recipe or machine settings for every box.
The approved sample defines the dimensions, appearance, unit weight and closure structure for bulk production. For tab-lock boxes, checks cover tab and slot alignment and engagement. For flip-top boxes, checks cover hinge movement, rim alignment and closing pressure. Both routes also receive visual, weight, stacking and carton-count checks.
For new menus, buyers can test samples on the actual packing line before order approval. This reduces fit issues caused by portion height, sauce cups, liners or delivery-bag dimensions.
Unused clamshells should remain sealed in dry export cartons, stored away from high humidity, sunlight, heat and strong odors. Cartons should not be compressed in storage because pressure can affect stack shape and lid alignment.
Ecoleaderpack manufactures cornstarch food packaging for takeaway, delivery, catering and retail foodservice. Our range includes clamshell boxes, food containers, plates, trays, bowls, cups and cutlery, allowing importers, distributors and foodservice brands to source coordinated products from one supplier.
Standard clamshell orders start from 50,000 pieces per item, while customized orders start from 100,000 pieces per specification or design. We support custom sizes, compartment layouts, logo embossing, printed retail packaging and branded export cartons, with specification review, sample confirmation and quality inspection arranged before bulk shipment.