Core Value List
Puncture resistance – ≤0.3% damage rate
LDPE/LLDPE co-extruded reinforced structure – tested with screwdrivers / hardware parts, no penetration.
Heat seal strength ≥8 kg/cm²
Stays sealed even under rough handling – directly reduces return rates.
Custom printing
Logos, warning labels, variable barcodes – rapid sampling from 5,000 pieces.
Flexible sizing
Non-standard dimensions accepted.
Specification Selection Guide
|
Parameter |
Range / Options |
Shipping Suitability Notes |
|
Size (W × L) |
15 cm × 20 cm up to 100 cm × 150 cm |
Covers various shipping needs – small electronics, daily goods, industrial parts, multi-item bundles |
|
Thickness |
40–150 microns |
40–60μm: Light small items – reduces DIM weight; |
|
70–90μm: Regular items – balances cost and strength; |
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|
100–120μm: Heavier or sharp-edged items; |
||
|
120–150μm: Heavy items, industrial parts |
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|
Printing |
No printing; Label area; Warning symbols;Brand logo; |
Reserved label area available. Logistics symbols: "Fragile," "Handle with care," "This way up," "Keep dry," etc. |
|
1–6 color gravure printing – supports CMYK + Pantone spot colors |
||
|
Material |
LLDPE |
Best tear resistance |
|
LDPE |
Soft and flexible |
|
|
HDPE |
Stiff and crisp |
|
|
Biodegradable |
Meets environmental requirements |
|
|
Bag Style |
Flat bag |
Basic flat bag |
|
Gusseted bag |
Larger capacity |
|
|
Stand-up pouch |
Strong bottom support – suitable for heavier items |
Closure Type Comparison
|
Closure Type |
Best For |
Operation Features |
|
Hot-melt adhesive strip |
Courier stations, e-commerce warehouses, no sealing equipment |
Peel off release liner, press to seal – simple, no equipment needed |
|
Flat / Plain (heat seal) |
Factory bulk packing, automated lines |
Requires heat sealer – strongest seal, lowest cost |
|
Self-seal (zipper / press-to-seal) |
Reusable applications, returns and exchanges |
Hand-press zipper closure – reusable, convenient for second use |
|
Drawstring closure |
Loose items, irregularly shaped items |
Pull drawstring to tighten – flexible operation |
|
Zipper bag |
Premium goods, brand retail, frequent opening/closing |
Slider or interlocking zipper – good seal, easy open and close |
Customization Process
1. Requirements confirmation
Submit design file / dimensions / thickness / closure type.
2. 2‑day sampling
Digital proof + small physical sample – confirm color difference and seal performance.
3. Smart production planning
MES system automatically schedules production, consolidates similar orders to lower MOQ.
4. Mass production & quality inspection
AI vision + tensile tester spot checks – every batch retained for traceability.
5. Split shipments
Supports full container load (FCL), less than container load (LCL), and partial shipments.
FAQ
Q: What is the difference between polyethylene shipping bags and ordinary plastic bags?
A: Shipping‑specific bags are designed for logistics scenarios. They offer stronger tear resistance, better puncture resistance, and higher seal strength. Optional hot‑melt adhesive strips improve packing efficiency. They also support custom logistics symbols and label areas to meet courier operating requirements.
Q: What is the MOQ? How can I request samples?
A: Standard (unprinted) MOQ: 10,000 pieces for regular sizes. Custom printed MOQ: 20,000 pieces.
Samples: We can supply 100–500 pieces as a trial order. Alternatively, you can pay a sample making fee for formal samples – the fee is then deducted from your bulk order.
Q: Does the hot‑melt adhesive strip lose adhesion in cold temperatures?
A: Our hot‑melt strip uses a cold‑tolerant formulation and remains highly adhesive at -10°C. For extremely cold regions, we recommend testing in advance. An enhanced adhesive strip is also available if needed.
Q: How can I avoid dimensional weight (DIM weight) overcharges caused by oversized bags?
A: Please provide the length, width, height, and weight of your items. We will recommend accurately sized bags to eliminate excess space. For irregularly shaped items, gusseted bags offer a better fit.
Q: Can you reserve a label area on the bag for courier shipping labels?
A: Yes. Options include a transparent label window or a printed "Label Here" box – helping couriers apply labels accurately and preventing bag damage or label detachment caused by pasting directly onto the bag surface.
Q: Are the bags suitable for automatic packing machines?
A: Yes. We supply perforated roll‑film that works with common automatic packaging machines. Please provide your machine parameters (bag length, bag width, core inner diameter, maximum roll diameter) for proper matching.
Q: How can I prevent the bag from being punctured by sharp items during transit?
A: We use LLDPE material, which offers better puncture resistance than standard PE. For sharp‑edged items (e.g., hardware parts, electronic components), we recommend a thickness of 100 microns or more, or adding an inner liner of bubble wrap or EPE foam for extra protection.
Q: What is the degradation time for biodegradable shipping bags?
A: We offer biodegradable materials compliant with EN13432. Under industrial composting conditions, they degrade >90% within 90–180 days. Degradation time in natural environments depends on temperature, humidity, and microbial activity.
Q: How do you guarantee lead times for large orders?
A: Custom orders are typically completed within 15–20 days. Rush orders can be expedited to 7–10 days. Split shipments are supported to reduce your inventory pressure.
Q: Do you support mixed‑batch ordering?
A: Yes. We support mixed sizes within the same material, thickness, and printing process. The MOQ is calculated based on the total quantity – convenient for customers needing multiple specifications.
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