Technical Specifications and Material Grade
Each polythene bag measures exactly 300 mm in width by 400 mm in length. A built-in 50 mm side gusset expands on both sides, allowing the bag to accommodate bulky or three-dimensional objects without blowing out the seams. Extruded to a precise thickness of 8 microns (0.008 mm), this light-gauge film provides high tensile strength despite its thin profile.
We manufacture these bags using 100% virgin polythene. Using virgin HDPE pellets guarantees a uniform molecular structure across the entire production run. You won't find the weak spots, thin patches, or chemical odors typical of recycled compounds.
Packaging and Supply Format
These bags are sold in cartons containing exactly 1000 pieces. They're packed loose and flat inside a single shipping box. This flat-pack format prevents wrinkling, saves shelf space in your warehouse, and keeps them ready for fast manual dispensing on busy assembly lines.
Practical Applications and Use Cases
This light-gauge gusseted bag serves as a simple barrier against dust, dirt, and moisture. Common applications include:
- Sorting industrial components: Grouping non-sharp hardware like brass nuts, plastic rivets, washers, and wooden dowels in fulfillment bins.
- Textile protection: Packaging shirts, socks, sewing notions, yarn, and small garments.
- Retail grouping: Bundling instruction manuals, printed booklets, and non-perishable hardware kits before final boxing.
- Part shielding: Covering clean metal casings, small plastic enclosures, and spare parts in storage.
Limitations and Exclusions
This 8-micron (0.008 mm) polythene bag isn't designed for demanding, heavy-duty tasks. Don't use it as a heavy builders' rubble sack, or for packing sharp metal scrap and abrasive construction waste. It doesn't hold certifications for direct food contact, pharmaceutical storage, or medical applications. Additionally, this thin material won't handle vacuum sealing or holding hot liquids.
Handling, Sealing, and Material Properties
High-density polyethylene naturally blocks moisture and dust. The film has a frosted, semi-transparent finish. This frosted texture reduces glare from overhead warehouse lighting while letting workers quickly read barcodes and identify contents. This speeds up your inventory counts and sorting.
For closure, the material is heat sealable. It welds easily using standard impulse bar sealers on low heat settings. You can also close it using packaging tape, twist ties, or by tying a manual knot. A standard recycling symbol is printed on each bag to encourage correct waste separation after use.
Choosing the Right Thickness and Size
If your items have pointed edges, sharp corners, or high weight demands, we recommend moving up to a thicker LDPE bag. While HDPE provides excellent tensile strength in thin gauges, it lacks the puncture resistance of low-density options. If the 300 x 400 mm dimensions limit your packaging line, Stoplast produces a broad range of wider layflat tubing, larger gusseted bags, and thicker films to suit your inventory.
Sectors Served
Our regular customer base for this specific 8-micron gusseted bag includes hardware distributors, assembly plants, e-commerce fulfillment hubs, and light manufacturing facilities. Stoplast has been a reliable PE and PP foil manufacturer for over 30 years, delivering industrial packaging materials that keep operations moving.
Stoplast HDPE Gusseted Poly Bag 300x400 mm
This lightweight polythene bag provides an expandable packaging solution for high-volume sorting and retail operations. The design incorporates side pleats that allow the bag to open wide, making it easy to pack bulky items without putting stress on the bottom seal.
Technical Specifications
- SKU Reference Number: hdpe-300-400
- Material Type: High-density polyethylene (HDPE)
- Raw Material Grade: 100% virgin polythene
- Flat Bag Width: 300 mm
- Flat Bag Length: 400 mm
- Integrated Side Gusset: 50 mm (creating a 100 mm total expansion)
- Film Thickness: 8 microns (0.008 mm)
- Tear Resistance Style: High tensile strength along length, prone to linear tear if punctured
- Product Appearance: Translucent, matte finish
- Pack Quantity: 1000 pieces per box
- Sealing Method: Compatible with standard impulse heat sealers
Application and Handling Limits
This 8-micron (0.008 mm) poly bag is built for lightweight dust protection and apparel sorting. It is not suitable for sharp-edged metal components, heavy mechanical parts, or wet waste. For demanding industrial loads, we recommend choosing our thicker LDPE bags. This product does not have certification for direct contact with food or pharmaceuticals.
Stoplast HDPE Gusseted Polyethylene Bag – 300 x 400 mm
The Stoplast hdpe-300-400 is a high-density polyethylene gusseted poly bag designed for dust protection, sorting, and retail packaging.
Every bag measures exactly 300 mm wide by 400 mm long. An integrated 50 mm side gusset expands easily, allowing you to pack three-dimensional or bulky items without tearing the sides. Extruded to a precise thickness of 8 microns (0.008 mm), this thin-gauge polythene bag keeps packaging weight to a minimum. It is manufactured from virgin HDPE polymer, providing excellent tensile strength despite its lightweight structure.
We supply these bags loose in cartons of 1000 pieces for easy dispensing at packing benches.
Recommended Applications
- Sorting and grouping lightweight industrial parts or hardware.
- Protecting apparel, garments, and textiles from dust during transport.
- Serving as protective dust liners for small boxes and storage bins.
- Packaging non-food retail goods at checkout.
Product Limitations
- This bag is not certified for food contact, medical use, or pharmaceutical packaging.
- It's not suitable for containing liquids or hot substances.
- Do not use this thin film for heavy objects with sharp, pointed corners.
Material Behavior and Handling
The high-density polymer yields great tear resistance under tension, so the film won't split easily during manual handling. Because we use virgin raw material, the film remains consistent and semi-translucent. This clarity means you can scan barcodes directly through the plastic without opening the bag. If your packaging line requires a complete seal, the open top works with standard heat-sealing machines.
Choosing the Right Thickness
If you're packing heavy metal fasteners or sharp industrial tooling, you'll need a thicker LDPE bag. However, when your goal is protecting lightweight goods from dust and moisture at the lowest cost, this 8-micron bag gives you the highest yield. It's the standard choice for e-commerce fulfillment operations and light manufacturing plants looking to reduce packaging waste.
Manufacturer / responsible person
ZPHU STOPLAST Tadeusz Ruta
Stojadła, ul. Kołbielska 16
05-300 Mińsk Mazowiecki, Polska
PL
Email: biuro@stoplast.com
Phone: +48 604 414 033
Product identification
Bag 300x400 1000 pcs
SKU: hdpe-300-400
Dimensions: 300 x 400 mm
Thickness: 8 micron
Safety information
This product is a plastic bag. It presents a suffocation and choking hazard. Keep away from babies and children. This is not a toy.