100% Compostable Poly Mailers with Custom Printing

Custom Printed 100% Compostable Poly Mailers

The Certified Bio-Based Packaging Solution That Matches Plastic Performance Without the Footprint

The Paradigm Shift in E-Commerce Fulfillment

For years, traditional polythene (LDPE/HDPE) shipping bags have been the backbone of global e-commerce logistics due to their low cost and durability. However, these conventional plastic mailers persist in ecosystems for centuries, breaking down into toxic microplastics that contaminate soil and water systems. Modern consumers are actively rejecting brands that rely on legacy plastics.

Our Custom Printed 100% Compostable Poly Mailers present a zero-compromise solution. By replacing petroleum-based resins with state-of-the-art plant starches, these shipping bags provide the exact same elasticity, puncture resistance, and moisture barrier as standard plastic mailers, while completely breaking down into nutrient-rich organic biomass after use.

Advanced Material Science: The PLA, PBAT, and Cornstarch Blend

To create a flexible shipping bag that is both environmentally transient and physically indestructible during transit, we utilize a precise, proprietary co-polymer blend:

• Polylactic Acid (PLA): Synthesized from fermented plant starches (primarily cornstarch and sugarcane). PLA provides structural stiffness, excellent tensile strength, and acts as the perfect substrate for high-fidelity custom ink adhesion.

• Polybutyrate Adipate Terephthalate (PBAT): A fully biodegradable, bio-based polymer that introduces exceptional flexibility, elastic elongation, and tear-defying impact resistance.

• The Synergy: Raw cornstarch alone is too brittle for shipping. By masterfully compounding PLA with PBAT, we create a specialized flexible film that stretches under intense pressure without tearing, matching the robust performance of heavy-duty industrial plastics.

Globally Certified Ecological Integrity

Greenwashing is a major concern for e-commerce brands and regulatory bodies alike. Our compostable mailing bags carry the world’s most stringent certifications, giving your legal and marketing teams absolute peace of mind:

• ASTM D6400 & EN 13432 Compliance: Universally certified by BPI (Biodegradable Products Institute) and TÜV Austria to decompose completely in industrial composting facilities within 90 to 120 days.

• OK Compost HOME Standard: Rigorously tested to break down in ambient backyard or residential home compost bins within 180 days.

• Zero Toxic Residue: Unlike oxo-degradable bags (which are merely standard plastics with chemical additives that fragment into microplastics), our bags undergo complete biological conversion. They leave behind only carbon dioxide, water, and non-toxic biomass that can support new plant growth.

Heavy-Duty Field Performance: Waterproof, Puncture-Resistant, Secure

A common misconception is that bio-based packaging is weak or soluble in water. Our mailers are engineered to withstand the harshest environments of global postal routing.

100% Hydrophobic Water Barrier

Whether your packages are exposed to torrential rain on a doorstep or high humidity in a cargo container, the exterior film is completely waterproof. Moisture cannot penetrate the barrier, keeping apparel, documents, and boxed goods perfectly dry and immaculate.

Industrial-Grade Tensile Elasticity

Our mailers feature a standard thickness of 60 microns (approx. 2.4 mil) with multi-directional fiber orientation. This design allows the bag to stretch significantly when overstuffed with bulky items (like winter jackets or shoes) rather than snapping or puncturing at stress points.

The Circular Design Advantage: Dual Adhesive Strips

Our mailers are intentionally engineered for a two-way journey, providing a massive functional benefit to your retail operations and your end consumers.

Sensory Branding: Premium Soft-Touch Matte Aesthetics

The unboxing experience begins the moment the customer picks up the package. Traditional plastic mailers feel crinkly, loud, and cheap.

Our compostable mailers feature a distinctive, premium matte, soft-touch texture that feels luxurious and organic in the hand. This tactile feedback immediately signals to the consumer that your brand invests in high-quality materials.

Eco-Friendly High-Definition Printing

We utilize advanced flexographic printing presses paired exclusively with non-toxic, water-based or soy-derived inks. This ensures that your custom branding—whether it is a minimalist monochrome logo, full-bleed artwork, or custom typography—remains 100% compostable without leaching heavy metal chemicals into the soil during decomposition.

Structural Parameters & Customization Options

Mandatory Storage & Shelf-Life Best Practices

Because these mailers are designed to organically break down when exposed to environmental elements, bulk wholesale buyers must follow specific storage guidelines to maximize shelf life:

The 12-to-18 Month Storage Rule: To prevent premature degradation of the bio-polymers, store your unused mailers in a climate-controlled, dry warehouse environment. Keep them sealed inside their original outer cartons, away from direct UV sunlight, localized heat sources (radiators), and ambient moisture. When stored correctly, the film maintains 100% of its original tensile strength for up to 1.5 years.

Frequently Asked Questions (FAQ)

Will these bags start breaking down if it rains during shipping?

No. The biodegradation process requires a combination of high moisture, warmth, and active microbial activity (microorganisms, bacteria, or fungi found in soil and compost piles). Rain, snow, or ambient ocean air during transit will not trigger degradation, as there are no active microbes on the smooth surface of the shipping bag.

Can we customize the exact size and print warning labels on the back?

Absolutely. We offer complete custom die-line sizing to match your exact shipping needs. Additionally, we can print mandatory suffocation warnings, recycling instructions, your brand’s social media handles, or specialized QR codes on the back or flap of the mailer using our certified eco-inks.

What is the minimum line thickness required for our vector design artwork?

To ensure crisp, clean ink lines that do not blur or bleed on the flexible PLA+PBAT surface, we recommend maintaining a minimum vector line weight of 0.5mm (approx. 1.5pt) and ensuring all fonts are fully outlined before submitting your design file (AI or PDF format).

Do these mailers emit any weird or chemical odors?

Unlike low-grade plastics or cheap alternative bioplastics, our premium cornstarch-infused mailers are completely odor-free. At most, a fresh batch might carry a very faint, pleasant, sweet popcorn-like aroma native to natural cornstarch processing, which disappears entirely once exposed to the air.