Knowledge Base: Professional Sterile Laboratory Sampling Bags
1. Product Introduction
Our Sterile Sampling Bag provide safe, leak-proof, and contamination-free containment for the collection, transportation, and short-term storage of liquid, solid, and semi-solid samples. Engineered for rigorous scenarios including food safety inspection, environmental monitoring, and biomedical research, these disposable sampling bags have become the preferred industry solution for standardized aseptic sampling operations.
2. Product Definition
Sterile sampling bags, commonly known as wire-closure sampling bags, are flexible disposable laboratory consumables manufactured from high-strength medical-grade polyethylene (PE) material. Equipped with an integrated wire closure system at the top, the bags can achieve complete airtight and moisture-proof sealing after sample collection. They effectively replace bulky rigid sampling containers, greatly saving storage space and reducing overall operational costs.
3. Material & Technical Parameters
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Parameter
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Specification Details
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Material
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High-purity medical-grade virgin LDPE resin
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Sterilization Standard
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Gamma irradiation / ETO sterilization (SAL 10⁻⁶)
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Film Thickness
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2.5 mil – 4.0 mil (custom heavy-duty thickness available)
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Transparency
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High clarity (≥95% light transmittance) for direct visual sample inspection
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Temperature Resistance
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-40°C to +80°C (supports low-temperature frozen sample storage)
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Compliance Certification
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FDA, CE, ISO 13485, BPA-free, Pyrogen-free
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4. Core Advantages
1. Guaranteed Aseptic Performance Every sampling bag is independently sterilized by gamma radiation. Equipped with a tamper-evident tear strip, the internal sterile environment remains intact before official use, effectively avoiding secondary contamination.
2. Reliable Leak-Proof Sealing Featuring a dual metal wire closure design, the bag forms a tight whirl seal after winding. Compared with ordinary zipper bags, it provides stronger airtightness and liquid tightness, preventing sample liquid leakage and odor dispersion.
3. Excellent Puncture & Tear Resistance Adopting high-strength modified PE formula, the bags withstand the extrusion and impact of stomacher homogenizer processing, and are not easily torn by sharp-edged solid samples.
4. Professional Traceability Design A large smudge-resistant white writing area is reserved on the bag surface, allowing clear marking of sample information, batch numbers, and test data to ensure full sample traceability.
5. Space & Cost Saving Lightweight and foldable, flexible bag design reduces 90% of storage space compared with traditional rigid sampling jars, greatly cutting down bulk packaging and international logistics costs for B2B customers.
6. Safe & Eco-Friendly Made of 100% pure virgin raw materials, free from silicone, plasticizers and pyrogens. No interference with sensitive laboratory test results, and the material is fully recyclable.
5. Specifications & Customization
Packaging Forms: Available in individual sterile sachet packaging and perforated roll packaging (transparent shrink-wrapped rolls), suitable for automated high-volume laboratory production lines.
Volume Range: 60ml, 120ml, 530ml, 710ml, 1600ml, up to 5000ml
Regular Dimensions: 3″×5″, 4.5″×9″, 7.5″×12″ and other mainstream sizes
Custom Services: Support OEM logo printing, customized film thickness, and exclusive size customization (MOQ applicable for personalized orders).
6. Application Scenarios
Food & Beverage Testing: Sampling and pathogen detection (Salmonella, Listeria, etc.) for food raw materials, finished products and semi-finished products.
Environmental Monitoring: Water quality sampling, soil sample collection, and surface microbial sampling for environmental inspection.
Medical & Pharmaceutical Industry: Collection of clinical specimens and sampling testing of pharmaceutical raw materials and auxiliary materials.
Agricultural Testing: Grain, seed and agricultural product sampling, as well as moisture and impurity detection.
7. Usage & Storage Guidelines
How to Use: Tear off the top tamper strip, pull the opening tabs to unfold the bag, place the sample inside, twist the bag mouth along the built-in wire for 3 circles, and fold both wire ends to complete locking and sealing.
Storage Conditions: Store in a cool, dry and dark environment, away from direct sunlight and high temperature. Keep the outer carton sealed to protect the independent sterile inner packages.
Shelf Life: 3 years from the sterilization date under standard storage conditions.
8. FAQ
Q: Are these sampling bags BPA-free? A: Yes. All our bags are made of pure virgin LDPE resin, 100% free of BPA and phthalates, safe for food and laboratory contact.
Q: Can the bags be used with a stomacher homogenizer? A: Definitely. Our 4.0 mil heavy-duty sampling bags are specially thickened and optimized to adapt to high-frequency homogenizer stirring and blending without breaking.
Q: What is the lead time for an order of 100,000 pieces? A: Standard sizes are in stock for fast delivery. Customized orders normally take 15–20 working days for production.
Q: Can you provide COA certification? A: Yes. Batch-specific Certificate of Analysis (sterility report) is provided with every shipment.
Q: Is the internal wire safe for sample contact? A: Absolutely safe. The metal wire is fully wrapped and isolated by PE film, with no direct contact with the sample.
Q: Can the bags be used for deep freezing? A: Yes. The material maintains good flexibility and toughness at -40°C, suitable for long-term frozen sample preservation.
Q: Is the film transparent enough for sample observation? A: Yes. The high-transparency film supports real-time visual inspection of sample color, clarity and texture changes.
Q: Are free samples available for testing? A: Yes. We offer free sample kits for qualified B2B buyers (customers bear the freight cost).
Q: Do you provide flat-seal or gusseted stand-up types? A: Both styles are available. We can provide flat-sealed bags and gusseted self-standing bags according to customer requirements.
Q: How are the products packed for international shipping? A: Adopt double-layer sterile inner packaging + thickened export carton outer packaging to prevent extrusion damage and ensure sterile integrity during long-distance transportation.
