What is an Airplane Box? Introduction to Structural Features and Uses

Definition and Origin of Mailer Box

Mailer Box is an integrally folded corrugated paper box. Its English name "Mailer Box" directly expresses its purpose—used for mailing. The mailer box gets its name from its box structure that resembles airplane wings when folded, and it is the mainstream packaging type for e-commerce express delivery.

The reason mailer boxes have become the top choice for e-commerce express delivery is that they solve a key contradiction: traditional corrugated boxes require multiple components for assembly, taking up space during transportation and storage. Mailer boxes achieve integral folded forming through die-cutting and creasing, requiring no glue or only minimal glue. They have a small volume when folded, low transportation costs, and quick forming when used.

Lexiang Packaging's custom mailer boxes support E-flute, B-flute, and other corrugated paperboards. Sizes can be customized according to the product, making them a common packaging solution for e-commerce sellers shipping goods.

Structural Features of Airplane Boxes

The structure of an airplane box is formed by folding a single piece of cardboard through die-cutting and creasing. The entire cardboard includes components such as the box body, box lid, insertion tabs, and locking tabs. After folding along pre-designed crease lines, it forms a three-dimensional box shape. Common structures include:

One-piece structure: The box body and lid are formed as a single unit, connected through crease lines. The lid is typically designed as a flip-top or insert-top style, with the insertion tab fitted into the locking tab to seal the box. This is the most common structure with high production efficiency.

Double-layer locking structure: Double-layer insertion tabs are designed between the box lid and body to enhance sealing firmness. Suitable for transporting products with heavier loads.

Window structure: A transparent window is designed on the front of the box body, using PET or PVC film to display the product inside. Window airplane boxes are suitable for scenarios where the product appearance needs to be displayed.

The structural design of airplane boxes needs to consider three core issues: smooth folding (creases not damaged after multiple folds), sealing firmness (the box does not open during transportation), and ease of opening (consumers can easily open it).

Corrugated Materials for Airplane Boxes

Airplane boxes commonly use E-flute and B-flute corrugated cardboard. E-flute has a corrugated thickness of approximately 1.5mm, with 295 flutes per meter, and a flat surface suitable for fine printing. E-flute has a load-bearing capacity of approximately 10kg, making it suitable for small electronic products, cosmetics, and apparel. E-flute is a commonly used configuration in Lexiang Packaging's custom airplane boxes.

B-flute has a corrugated thickness of approximately 3.0mm, with 168 flutes per meter, and a load-bearing capacity of approximately 20kg, making it suitable for transporting medium-weight products. The B-flute surface is not as flat as E-flute, but offers better cushioning. The selection of E-flute and B-flute is determined by product weight and display requirements.

The layered structure of corrugated cardboard affects the strength of the box type. Single-wall corrugated (E-flute or B-flute) is the most commonly used airplane box material, while double-wall corrugated (such as EB-flute) is suitable for heavy-duty products. Airplane boxes generally do not use double-wall corrugated because the folding performance of double-wall corrugated is not as good as single-wall.

The raw materials of corrugated cardboard affect environmental performance. Corrugated cardboard made from virgin wood pulp has high strength and a white color; corrugated cardboard made from recycled pulp has slightly lower strength and a yellowish color. Kraft paper corrugated is a common choice for airplane boxes, being environmentally friendly and offering good toughness.

Surface Finishing of Aircraft Boxes

The surface finishing of aircraft boxes differs from that of gift boxes, with greater emphasis on practicality and cost. Lamination is a common process for aircraft boxes—gloss film adds shine, while matte film provides a delicate feel. Spot UV is less common on aircraft boxes than on gift boxes, because the folding requirements of aircraft boxes increase the risk of UV cracking.

Printing is the core process for aircraft boxes. Digital printing suits small-batch customization, supports a minimum order of one unit, and is the first choice for sampling and small-batch production. Offset printing suits large-scale production, with good color reproduction and low unit cost. Flexographic printing suits direct printing on corrugated cartons and offers high efficiency.

Hot foil stamping is also used on aircraft boxes, but is limited by the surface flatness of corrugated board. The subtle unevenness on the corrugated surface affects the foil stamping effect, so hot foil on aircraft boxes is usually applied to stickers or decorative strips rather than directly on the box surface. Embossing is rarely used on aircraft boxes.

Common process combinations for aircraft boxes: digital printing + matte lamination, E-flute + white card paper face paper + E-flute corrugation, E-flute + kraft paper + single-color printing. Simple process combinations are the mainstream for aircraft boxes, because aircraft boxes are positioned as economical express shipping packaging.

Common Uses of Mailer Boxes

E-commerce shipping is the most common use scenario for mailer boxes. Clothing, shoes, small electronics, cosmetic accessories, household items, and cultural/creative products are often packaged in mailer boxes. With low cost, shipping-friendly design, and high consumer acceptance, mailer boxes are the standard choice for e-commerce fulfillment.

Mailer boxes are also a popular choice for brand customization scenarios. Brand logos, visual elements, and printed patterns appear directly on the box surface, making every shipment a brand touchpoint. Many e-commerce brands use mailer boxes as a low-cost brand-building tool—the box structure remains the same, but the visual design is refined, coordinated with brand colors and logos, significantly enhancing the unboxing experience.

Mailer boxes are a common choice for subscription box scenarios. Subscription boxes require regular shipping and high visual recognition. The one-piece molded structure and die-cutting customization capabilities of mailer boxes enable unique box designs, making them a visual asset for subscription brands.

Mailer boxes are also used as outer protective boxes in gift box scenarios. Combining high-end gift boxes with mailer box outer cartons is a common practice—mailer boxes provide shipping protection while gift boxes deliver visual quality. This combination balances cost and protection.

Advantages and Limitations of Airplane Boxes

The advantages of airplane boxes are mainly reflected in five aspects: first, folded transportation saves space, with the unassembled box volume being only 1/5 to 1/10 of the finished product; second, courier-friendly, with a sturdy structure and good compression resistance; third, low cost, as corrugated cardboard is inexpensive and die-cutting efficiency is high; fourth, easy to use, as folding and forming requires no glue or minimal glue; fifth, environmentally friendly and recyclable, as corrugated cardboard is a circular economy-friendly material.

The limitations of airplane boxes are reflected in three aspects: first, limited load-bearing capacity, with E-flute airplane boxes carrying approximately 10kg and B-flute approximately 20kg, making them unsuitable for heavy products; second, the structure is relatively simple, and the appearance grade is not as premium as hardcover gift boxes; third, complex structures cannot be made, and the opening method is relatively singular.

Airplane boxes and gift boxes have very different positioning. Gift boxes cover high-end gift scenarios, while airplane boxes cover e-commerce courier scenarios. The two are used in combination (gift box nested inside an airplane box as outer packaging), but they are not a substitute relationship. Lexiang Packaging clearly distinguishes the usage scenarios during consultation.

Selection Guide for Airplane Boxes

Size Selection: Airplane box dimensions are determined by the product dimensions. The internal dimensions of the box should be 5-10mm larger than the product dimensions (to provide buffer space), and the external dimensions should be kept within the courier company's free shipping range (e.g., the sum of three sides should not exceed 60cm).

Material Selection: For lightweight products (under 500g), choose E-flute; for heavy products (500g-2kg), choose B-flute. For high display requirements, choose E-flute (smooth surface); for high cushioning requirements, choose B-flute (better cushioning performance).

Process Selection: For simple logos + single color, choose single-color printing or white cardboard lamination. For multi-color logos + brand colors, choose four-color printing + film lamination. For high-end brands, partial UV or hot stamping logo stickers can be selected.

Minimum Order Quantity: The minimum order quantity for traditional airplane boxes is 1000 pieces. Lexiang Packaging supports small-batch customization starting from 10 pieces, suitable for new product trial sales, brand sampling, and limited editions. The unit price decreases in tiers as the quantity increases.

Lexiang Packaging's Custom Mailer Box Capabilities

Lexiang Packaging supports custom mailer boxes made of E-flute and B-flute corrugated cardboard. Dimensions can be customized according to the product, with standard sizes ranging from 10×10×5cm to 50×40×30cm. The process combinations include digital printing, offset printing, lamination, spot UV, and gold foil logo stickers.

Small-batch customization with a minimum order of 10 units is supported, with samples ready in 3 days. The bulk production cycle is 7-15 days. For e-commerce sellers, brand owners, and subscription box service providers, Lexiang Packaging offers full-process support from size design and material selection to production and delivery.

Packaging boxes and labels are completed in one stop. Mailer boxes can be paired with shipping labels, logo labels, and anti-counterfeit labels. The accompanying logistics labels are affixed to the surface of the mailer box, simplifying the shipping process.