What are Bottom Gusset Plastic Bags
Bottom gusset plastic bags are a type of high-functional flexible plastic packaging bag with a specially designed bottom gusset structure. Different from ordinary flat plastic bags, they adopt a foldable gusset design at the bottom of the bag body.
This structural design enables the plastic bag to expand vertically and horizontally when bearing goods, realizing self-standing placement.
They are mostly made of high-quality polyethylene (PE) and other plastic materials, integrating flexibility, durability and three-dimensional packaging performance, and are one of the most commonly used packaging bags in logistics, retail and industrial packaging fields.
Main Features and Advantages of Our Bottom Gusset Plastic Bags
Main Features
- First, the independent bottom gusset structure, with uniform folding and neat shaping, can freely expand the internal space without deformation.
- Second, the bag body has high toughness, uniform thickness, no thin or broken points, and strong pressure resistance and drop resistance.
- Third, the edge sealing is precise and firm, with no wire drawing or cracking, effectively preventing leakage.
- Fourth, the product is lightweight and flexible, easy to store and carry, and will not occupy excessive storage space.
- Fifth, it supports customized expansion and contraction, with strong adaptability to different packaging specifications.
Core Advantages
- Our bottom gusset plastic bags adopt raw material purification technology, with non-toxic, odorless, environmentally friendly and recyclable materials, meeting international packaging safety standards.
- The self-standing design improves packaging aesthetics and display effect, suitable for shelf display sales.
- Compared with ordinary flat bags, they have larger loading capacity and higher space utilization rate.
- The customized thickened design enhances wear resistance and service life, suitable for long-distance transportation and repeated use.
- In addition, we support full personalized customization, with diverse styles and low customized threshold, which can meet the differentiated packaging needs of different brands.
Key Features
High Toughness
Precise Edge Sealing
Lightweight & Flexible
Non-toxic & Odorless
Self-standing Design
Larger Loading Capacity
Customized Thickened
Personalized Customization
Styles, Colors and Materials of Bottom Gusset Plastic Bags
Product Styles
Our bottom gusset plastic bags cover multiple mainstream styles:
- ordinary flat mouth bottom gusset bags
- self-sealing bottom gusset plastic bags
- adhesive seal bottom gusset bags
- tear tape type bottom gusset bags
- reinforced edge bottom gusset bags
- portable bottom gusset bags
Each style can be adjusted in gusset width and bag body structure according to customer needs, supporting conventional and special-shaped customized styles.
Optional Colors
Conventional stock colors include transparent, milky white, black, gray, blue, red, green, yellow and other conventional solid colors.
We also support matte transparent, frosted black, pearlescent color, gradient color and other special effect colors.
In addition, full-color customized printing, color matching brand LOGO and personalized color design are available to meet high-end brand packaging needs.
Main Materials
- 1. PE (Polyethylene): The most mainstream material, with soft texture, strong toughness, waterproof and dustproof, low cost, suitable for daily logistics and commodity packaging.
- 2. LDPE (Low Density Polyethylene): Soft and transparent, non-toxic and environmentally friendly, good ductility, suitable for food, cosmetic and delicate product packaging.
- 3. HDPE (High Density Polyethylene): High hardness, strong compression and wear resistance, suitable for heavy-duty goods packaging and industrial transportation.
- 4. Composite plastic material: Multi-layer composite, waterproof, anti-pressure and anti-tear, suitable for high-grade product packaging and cross-border logistics.
Product Structure and Type Classification of Bottom Gusset Plastic Bags
According to the structural design and functional differences, our bottom gusset plastic bags are divided into multiple types, covering all market demand categories:
1. Ordinary Bottom Gusset Flat Bag
Simple structure, no self-sealing design, cost-effective, suitable for conventional bulk packaging;
2. Self-Sealing Bottom Gusset Bag
With self-sealing strip, reusable, good sealing performance, suitable for repeated opening and closing packaging;
3. Adhesive Seal Bottom Gusset Bag
Equipped with high-viscosity adhesive tape, one-time sealing, anti-disassembly and anti-counterfeiting, suitable for logistics express packaging;
4. Tear Tape Bottom Gusset Bag
Built-in easy tear tape, convenient to open without tools, neat opening, beautiful and practical;
5. Reinforced Thickened Bottom Gusset Bag
Thickened bag body and reinforced bottom structure, super load-bearing, suitable for heavy-duty goods packaging;
6. Portable Bottom Gusset Bag
With integrated portable design, easy to carry, suitable for retail sales and gift packaging;
7. Transparent Frosted Bottom Gusset Bag
Frosted matte structure, high-grade texture, suitable for high-end brand product packaging.
Specific Production Process of Bottom Gusset Plastic Bags
Our bottom gusset plastic bags adopt standardized full-process automated production, with strict process control to ensure product quality stability. The specific process flow is as follows:
Steps 1 to 4
1. Raw Material Screening and Purification: Select high-quality plastic raw materials, remove impurities, purify raw materials to ensure non-toxic and odorless raw materials;
2. Melting and Blown Film: Heat and melt the purified plastic particles, blow them into uniform plastic film through professional film blowing equipment, control film thickness evenly;
3. Bottom Gusset Folding Forming: Automatically fold and shape the film bottom through gusset equipment to form a standard bottom telescopic gusset structure;
4. Printing Processing (Customized): Carry out gravure/flexo full-color printing according to customer design drafts;
Steps 5 to 8
5. Edge Sealing and Cutting: Adopt high-temperature hot-melt edge sealing technology, seal the bag body firmly, and cut according to customized size specifications;
6. Fine Finishing: Trim burrs, detect sealing tightness, punch holes or paste adhesive according to style requirements;
7. Quality Inspection and Sorting: Conduct thickness, tensile force, leak-proof and appearance full inspection;
8. Finished Product Packaging and Warehousing: Qualified products are counted and packaged, stored in classified warehouses and delivered on demand.
Application Scenarios of Bottom Gusset Plastic Bags
Bottom gusset plastic bags have wide applicability and can be used in multiple industries and scenarios:
- 1. E-commerce Logistics Express Packaging: Suitable for shipping clothing, accessories, daily necessities, small electronic products, with waterproof and drop-proof functions to protect goods in transit;
- 2. Retail Supermarket Packaging: Used for packaging snacks, groceries, toys, daily retail goods, with self-standing design suitable for shelf display;
- 3. Industrial Hardware Packaging: Packing hardware parts, accessories, mechanical small parts, dustproof and moisture-proof, convenient for storage and sorting;
- 4. Cosmetic and Personal Care Packaging: Safe and non-toxic materials, suitable for packaging cosmetics, skin care products, personal care small items;
- 5. Food Packaging: Food-grade raw material models can package dried fruits, snacks, grain and other food products;
- 6. Stationery and Toy Packaging: Packing stationery, toys, handicrafts, beautiful and durable, suitable for commodity sales packaging;
- 7. Cross-border Logistics Packaging: Wear-resistant and pressure-resistant, suitable for long-distance cross-border transportation, reducing product damage rate.
Common Size and Thickness Table of Bottom Gusset Plastic Bags
| No. | Bag Size (Width*Length+Bottom Gusset)mm | Thickness (Single Layer)(mm) | Applicable Scenarios |
|---|---|---|---|
| 1 | 100*150+30 | 0.03-0.05 | Small accessories, jewelry, earphone parts |
| 2 | 150*200+40 | 0.05-0.08 | Cosmetics, stationery, small daily necessities |
| 3 | 200*250+50 | 0.08-0.10 | Snacks, toys, electronic parts |
| 4 | 250*300+60 | 0.10-0.12 | Clothing, daily necessities, medium goods |
| 5 | 300*350+70 | 0.12-0.15 | Hardware parts, thick clothing, heavy goods |
| 6 | 350*400+80 | 0.15-0.20 | Large daily necessities, industrial parts |
Note: All sizes and thicknesses support personalized customization, and special specifications can be produced according to customer drawings and samples.
Factory Direct Supply and Price Advantages
We are a professional manufacturer of bottom gusset plastic bags with independent factory, complete production equipment and mature production lines. Adhering to the factory direct sales model, we completely eliminate intermediate distributors, agents and other price difference links, bringing core price benefits to customers.
On the premise of ensuring high product quality, we optimize production processes, control raw material costs and improve production efficiency, so as to provide customers with ultra-high cost-effective products.
For bulk orders and long-term cooperative customers, we support flexible wholesale discounts, customized preferential policies and free sample services. While ensuring low prices, we strictly control product quality, avoid inferior raw materials and defective products, and realize real high-quality and low-price factory direct supply.
Quality Inspection Standards
1. Raw Material Inspection
We inspect all plastic plastic raw materials to ensure they are pure, non-toxic, odorless, and compliant with RoHS and REACH environmental safety standards.
2. Semi-finished Inspection
We check film flatness, bottom gusset folding shape and heat-sealing quality during production to avoid defective products.
3. Appearance Inspection
All bags are fully inspected to ensure clean surface, uniform color, neat gusset shape and no scratches or damage.
4.Size & Thickness Inspection
We strictly control bag size, gusset width and single-layer thickness to meet customer customized specifications.
5.Leakproof & Sealing Test
Every batch undergoes airtight and water leak tests to ensure firm sealing without leakage.
6. Tensile & Load-bearing Test
We test tensile strength and load capacity to ensure the bags are tear-resistant and durable for logistics transportation.
7. Drop Resistance Test
Standard drop tests are performed to verify the bags can withstand daily logistics drops without breaking.
8. Printing Quality Inspection
Custom printed bags are checked for clear patterns, no fading, no ghosting and accurate color alignment.
9.Aging & Weather Resistance Test & 10.Factory Sampling & Third-party Test
Regular high and low temperature aging tests ensure the bags remain stable in different transportation environments. We conduct final sampling before delivery and support authorized third-party quality testing with official reports.
OEM Brand Customization Service
We provide one-stop professional OEM brand customization services for global merchants, supporting private brand exclusive customization. Whether you are a small and medium-sized enterprise, cross-border e-commerce seller or large brand merchant, we can meet your personalized OEM needs.
Our OEM services cover exclusive product specification customization, exclusive material formula adjustment, exclusive structural design, brand private mold opening, batch customized production and after-sales exclusive service. We support customers to provide brand design requirements, and our professional design team will assist in optimizing solutions. We strictly implement brand confidentiality agreements, protect customer brand patent rights, and provide stable batch production capacity to support long-term brand OEM cooperation.
Custom Printing Service
We support diversified high-precision custom printing services for bottom gusset plastic bags and poly mailers. Printing processes include flexo printing, gravure printing, digital full-color printing, hot stamping, silver stamping, embossing and other high-end printing technologies. We can print customer brand LOGO, brand slogan, product information, QR code, pattern design, personalized text and other content.
The printing effect is clear, colorfast, no offset, no ghosting, with strong three-dimensional sense and high restoration degree. We support small-batch trial printing and large-batch mass printing, provide free typesetting and design services, and customize exclusive printing styles according to brand positioning, helping customers enhance brand image and product competitiveness.
Why Choose Us
- 1. Professional Factory Strength: We are a professional manufacturer focusing on bottom gusset plastic bags and poly mailers, with 10+ years of packaging production experience, complete production equipment and mature technology;
- 2. Superior Price Advantage: Factory direct supply without middlemen, high cost performance, support bulk discount and long-term cooperation concession;
- 3. Strict Quality Control System: Full-link quality inspection from raw materials to finished products, support third-party testing, qualified quality and stable performance;
- 4. Diversified Customization Capabilities: Support size, thickness, color, structure, printing, OEM brand all-round customization, meet differentiated needs;
- 5. Perfect Service System: Provide free sample, free design and typesetting, fast proofing, timely after-sales service, 24-hour online customer service;
- 6. Fast Delivery Capacity: Sufficient raw material inventory and standardized production line, support urgent order production, stable delivery cycle, no delay in delivery;
- 7. Environmental Safety Compliance: All products meet international environmental protection and safety standards, support export to Europe, America, Southeast Asia and other global regions.
FAQ
Q1: Are you a factory or a trading company?
A: We are a professional direct manufacturer of bottom gusset plastic bags and poly mailers with independent production workshops and complete production and testing equipment, supporting factory direct sales and global customized wholesale services.
Q2: Do you support customized logo and pattern printing?
A: Yes. We support flexo printing, gravure printing, full-color digital printing and other processes, can customize any brand LOGO, pattern, text and QR code, and provide free design and typesetting services.
Q3: What is the minimum order quantity for customized products?
A: customized size, color and printing products have low MOQ, and we can negotiate flexible order quantities according to customer needs to support small-batch trial orders and large-batch mass orders.
Q4: Can you provide free samples?
A: Yes, we can provide free existing product samples for customers to test quality and check styles, customers only need to bear the freight cost.
Q5: What certifications do your products have?
A: Our products comply with EU ROHS, REACH environmental protection standards, and can provide quality inspection reports, environmental protection certification and other relevant documents to support global export customs clearance.
Q6: How long is the production and delivery cycle?
A: large batch and special process customized products will confirm the cycle separately according to the order quantity and process difficulty.
Q7: Are the plastic bags waterproof and tear-resistant?
A: All our bottom gusset plastic bags have excellent waterproof, dustproof and moisture-proof properties. Conventional models have good tear resistance, and thickened reinforced models can meet heavy-duty anti-tear and anti-pressure needs.
