Product Overview
This heat sealable flat bottom gusset bags is a minimalist, single-layer packaging pouch featuring a bottom-sealed design. It is manufactured using brand-new, food-grade LDPE (Low-Density Polyethylene) raw materials, resulting in a body that is crystal-clear, highly transparent, and free of impurities. The bag incorporates a unique side-gusset folding design on both flanks and features a heat-sealed bottom; it is classified as a high-toughness, solid-color, transparent flexible packaging bag. The material is soft yet highly resistant to stretching, possessing exceptional durability and resistance to tearing or cracking. Furthermore, it is odorless and fully complies with food-contact safety standards. We also offer OEM/ODM customization services, including custom logo printing as well as tailored dimensions and material thicknesses, making this a highly cost-effective and versatile transparent packaging solution suitable for a wide range of applications—including food products, daily necessities, hardware, creative goods, accessories, and industrial items.
Product Features
Material
Pure single-layer LDPE (Low-Density Polyethylene) ensures safety and transparency.
Bag Structure
Bottom-sealed via high-temperature heat pressing, providing a secure, leak-proof closure.
Side Design
Side-gusseted design allows expansion to accommodate contents, creating a neat square shape.
Opening Style
Flat-top opening compatible with manual or machine heat sealing, or tie-closure methods.
Transparency
Crystal clear, free of haziness, allowing a direct view of the contents for premium presentation.
Texture & Durability
Soft yet resilient, resistant to stretching, low temperatures, and unlikely to crack or become brittle.
Lightweight & Space-Efficient
Single-layer flexible film conforms to contents, allowing gap-free stacking and reducing storage and logistics costs.
Customization Flexibility
Supports single/multi-color printing, custom logos, pattern design, and matte or glossy finishes.
Product Advantages
Dust & Moisture Protection
Heat-sealed bags create an airtight barrier against air, moisture, and dust.
Physical Protection
Cushions against friction, scratches, and minor impacts; ideal for jewelry, hardware, and creative items.
Organized Storage
Uniform shape allows easy sorting, portioning, and bulk storage, improving inventory and shipping management.
Airtight Preservation
Strong seal locks in aroma and maintains the quality of dry goods.
Applicable Scenarios
- Dried Food & Grocery Industry
Tea, herbal tea, dried fruits, nuts, grains, assorted cereals, candies, baking ingredients, dried food staples, and portion packaging for snacks.
- Accessories & Creative Goods Industry
Jewelry, earrings, bracelets, pendants, trading cards, stickers, creative merchandise, and simple transparent packaging for gifts.
- Hardware & Industrial Supplies
Small hardware fittings, screws, fasteners, plastic components, electronic accessories, and dust-proof packaging for small tools.
- Daily Chemicals & Household Goods
Trial-size toiletries, soaps, bath sponges, disposable items, and transparent packaging for travel kits.
- General E-commerce & Trade Use
Packaging for cross-border e-commerce shipments, sample distribution, storage of bulk goods, and simple transparent packaging for trade purposes.
Common Sizes, Thickness & Typical Applications
| Width (cm) | Gusset (cm) | Height (cm) | Thickness (μm / mils) | Typical Items Packaged |
|---|---|---|---|---|
| 10 | 5 | 20 | 50–100 μm (≈ 2–4 mils) | Small snacks, nuts, tea, spices |
| 15 | 7 | 25 | 50–120 μm (≈ 2–5 mils) | Coffee, dried fruits, candies, pet treats |
| 20 | 8 | 30 | 60–150 μm (≈ 2.4–6 mils) | Granules, powder, cereals, pet food |
| 25 | 10 | 35 | 70–150 μm (≈ 2.8–6 mils) | Snacks, grains, health supplements, medium-size products |
| Customizable | Customizable | Customizable | Customizable | Any product according to customer needs |
Production Process
- Raw Material Feeding: LDPE pellets are fed into a melt-blown film extrusion system to produce a uniform, transparent, single-layer film.
- Printing Process: Customized gravure or flexographic printing is performed using eco-friendly water-based inks; the ink adhesion is robust, and the finished product is odorless.
- Side Gusset Forming: Automated machinery folds the side gussets, ensuring a straight, symmetrical, and neat bag structure.
- Bottom Heat Sealing: The bottom seam is sealed using a constant-temperature heat-sealing process, resulting in a flat, airtight seal free of gaps or bubbles.
- Cutting and Trimming: The top edge is precisely cut to create a flat opening, resulting in a smooth, clean cut free of rough edges.
- Quality Inspection: Rigorous quality checks are conducted, including light transmission tests to detect pinholes, tensile strength tests on the seams, and random dimensional sampling.
- Packaging and Shipment: The finished bags are neatly stacked, packed in moisture-proof materials, and secured in export-standard cartons for shipment.
FAQ
Q1: Do you support custom sizes and colors?
A1: Yes, we do. Our OEM/ODM services cover customization of size, thickness, color, and printing.
Q2: Can these bags be used for hot liquids?
A2: Heat-sealable bags are primarily designed for dry goods or solid products. If you need to package hot liquids, please consult with us.
Q3: Are they suitable for retail display?
A3: Absolutely. The flat-bottom gusset design ensures excellent stability on store shelves.
Q4: Are biodegradable options available?
A4: Yes, they are. We offer eco-friendly, biodegradable film options that comply with international standards.
Q5: Can these bags be heat-sealed? What type of sealing machine is suitable?
A5: They are compatible with all standard heat sealers, impulse sealers, and continuous band sealers. A simple application of heat to the open end creates a tight, secure seal that is highly resistant to cracking.
Q6: Do the bags have any odor? Are they safe for food packaging?
A6: Produced using brand-new, virgin raw materials, our bags are free from any pungent odors. They are made from food-grade materials and are safe for direct contact with dry food products.
Q7: What is the Minimum Order Quantity (MOQ)?
A7: Generally, the MOQ starts at 500 kg. For specific details, please consult with our sales manager.
