--- title: "How to Produce Paper Bags Using Flexo Printing: A B2B Manufacturing Guide" date: 2026-05-02T08:00:00Z modified: 2026-08-15T14:38:19Z permalink: "https://www.zp-flexopress.com/blog/basic/how-to-produce-paper-bags-flexo-printing/" type: post status: publish excerpt: "" wpid: 1418 categories: - basic featured_image: "https://www.zp-flexopress.com/wp-content/uploads/2026/05/2-3-e1779266312689.webp" featured_image_alt: Automated flexo printing line for paper bags timestamp: 2026-08-15T14:38:19Z tags: - basic --- ## Quick Answer Paper bags are manufactured using flexographic printing on 80 to 120 GSM kraft paper, which offers tensile strength up to 6.5 kN/m. The process runs at 100 to 350 meters per minute with color alignment within ±0.1 mm. Flexo presses handle 2 to 8+ color stations and reduce ink consumption by up to 15%. RAZP, a trusted manufacturer of CI and Stack flexo printing machines, has installed over 500 presses across 15 countries. The demand for paper packaging in retail, food service, and e-commerce is rising fast. This is mainly due to rising concerns about “green” and “environmentally-friendly” products and packaging. Manufacturers and printing presses must understand **how to produce paper bags** to help them choose the right configuration for their product line. This technical requirement has shifted the industry toward [flexographic printing](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/post/understand-flexographic-printing-process.md), which perfectly balances production speed, color accuracy, and ink efficiency. In this guide, you will learn about [**paper bag manufacturing**](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/page/factory.md) using flexo printing, the raw materials used, and how the paper bag manufacturing works. This article also discusses the benefits of using paper bags. ## Why Your Business Benefits from Using Paper Bags Why are businesses resorting to paper bags rather than plastic packaging? The answer is simple. Paper bags help eliminate long-lasting plastic waste because they are both biodegradable and easy to recycle. They also support branding and regulatory compliance for businesses. Here are other advantages of using paper bags for your business needs: ### Practical and business benefits 1. Paper bags offer a better brand image. Using paper bags demonstrates environmental responsibility, which boosts brand perception and builds customer loyalty. 2. Paper bags are easily customizable and versatile. They are available in many sizes and styles and accept high-quality printing for marketing and packaging uses. 3. Paper-based packaging is practical and sturdy. The combination of advanced kraft paper and sturdier handles makes paper bags sufficiently robust for carrying food, products, and gifts. 4. Paper bags are easy to store. They have box-like structures and can be folded easily. ![Eco-friendly brand paper bag in retail shop](https://www.zp-flexopress.com/wp-content/uploads/2026/05/2-2-e1779266401692-1200x649.webp) ## What Are the Properties of a Paper Bag? Buyers must understand how specific material characteristics influence both production efficiency and end-use performance before selecting equipment. To ensure the right choice is made, **what are the properties of a paper bag**? Each paper bag has the following properties and specifications: 1. **Substrate:** Kraft paper, with a thickness of 80 to 120 GSM, offers tensile strength up to 6.5 kN/m (kilonewton per meter). Kraft paper is recyclable and helps reduce material cost and supports circular sourcing. 2. **Coating:** Polyethylene (PE) or polypropylene (PP) lamination provides a coating that adds moisture resistance for food-grade and cold-chain applications. 3. **Paper Bag Structure:** Each paper bag can be square-bottom (SOS), flat-bottom, pinch-bottom, or gusseted. The different designs determine how much weight the bag can hold and how well it sits on a shelf. 4. **Handle Types:** Each paper bag requires a different handle attachment that depends on its usage. Different machine setups are required depending on whether you are attaching flat paper, twisted rope, or die-cut handles. 5. **Printability:** Kraft paper’s porous surface accepts [water-based](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/post/uv-flexo-ink-vs-waterbase-ink.md) and soy-based inks readily, making it well-suited for flexo plate transfer. These properties determine your substrate feed speed, ink viscosity settings, and anilox roller selection on the press. ## How Are Paper Bags Manufactured? ![Five main steps on how to produce paper bags](https://www.zp-flexopress.com/wp-content/uploads/2026/05/2-1-e1779266418130-1200x652.webp) **Paper bag manufacturing** involves many stages and requires machines. Here is a step-by-step procedure on **ho****w paper bags are made** in a modern factory setting: ### Step 1: How to Prepare the Raw Materials The process starts by mounting large paper rolls onto a motorized stand that automatically manages tension. This step is essential for keeping the paper centered and aligned. This prevents web tears and keeps the substrate feeding straight into the downstream stations. Paper thickness and texture dictate how quickly ink soaks in and how sharp the final image looks. ### Step 2: The Flexo Printing Process The next step is when the paper roll passes through the flexo press. This is either in line with the bag-forming machine or as a standalone offline unit. Inking plates wrap around spinning cylinders to transfer designs onto the paper at speeds of 100 to 350 meters per minute. Food-safe inks, such as water or soy-based options, dry quickly using hot air or UV light. High-precision presses maintain color alignment within ±0.1 mm, which eliminates [printing errors](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/post/troubleshooting-flexo-printing-defects.md) and waste during large orders. ### Step 3: Folding and Cutting the Paper Bags When the inks have dried, the printed substrates are sent into the folding machines. The paper is formed into side panels and bottom gussets using rollers and precision guides. Mechanical blade or laser cutting then separates the continuous web into individual bag blanks. Precise cutting and folding prevent glue leaks and crooked handles later in production. ### Step 4: Bottom Gluing and Pressing A bottom-gluing machine applies either fast-drying hot-melt adhesive (sets in 1 to 3 seconds) or liquid cold glue to the bag’s base. Pressing rollers then flatten and seal the bottom. A sturdy, flat bottom allows the bag to stand upright and support weights typically ranging from 3 to 10 kg. ### Step 5: Attaching the Handle and Applying the Finish Handle machines punch holes and attach flat, twisted, or cotton handles to the top of the bag. Glue-bonded patches reinforce these areas to prevent tearing, while optional cardboard base inserts add extra strength for heavier items. ## Why Choose Flexo Printing for Producing Large-Scale Paper Bag Manufacturing Flexo printing is ideal for manufacturers who want to know **how to produce paper bags** on a large-scale basis. There are three critical factors that determine flexo printing: speed, substrate flexibility, and operating cost. Here’s why you need to select flexo printing for **paper bag manufacturing:** 1. [Stack-type flexo presses](https://www.zp-flexopress.com/product-category/printing-machines/flexible-packaging-printing-machines/stack-type-flexo-printing-machines/) print at high speeds of 100 to 350 m/min. This allows high-volume output with short changeover times. 2. [Flexo printing machines](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/product/satellite-type-4-color-flexographic-printing-machine-200m-min-water-based-ink-paper.md) have a wide color range of 2 to 8+ color stations. This allows printing CMYK and Pantone spot colors in a single pass. 3. Flexo machines have optimized [anilox rollers](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/post/anilox-roller-cleaning-methods.md) that reduce ink consumption by up to 15% as compared to older press configurations. This reduces per-unit cost on long runs. 4. Stack-type flexo printing machines can handle the porosity and weight variation of 70 to 120 GSM kraft and recycled paper. This is without ink bleed or registration drift. 5. Flexo printing water-based inks meet ISO 2863 adhesion standards and align with paper bag recycling requirements. Product Card – Flexo Label Printing Machine /\* — 产品卡片基础样式 — \*/ .product-card { display: flex; align-items: stretch; border: 1px solid #e0e0e0; border-radius: 8px; padding: 20px; margin: 20px 0; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); max-width: 900px; background-color: #ffffff; font-family: ‘Poppins’, sans-serif; } /\* 左侧图片 30% \*/ .product-card .card-image { flex: 0 0 30%; max-width: 30%; margin-right: 25px; display: flex; align-items: center; justify-content: center; } .product-card .card-image img { width: 100%; height: auto; max-height: 200px; display: block; border-radius: 4px; object-fit: contain; } /\* 右侧内容 70% \*/ .product-card .card-content { flex: 1 1 70%; width: 70%; display: flex; flex-direction: column; justify-content: center; } /\* 标题 \*/ .product-card .product-title { margin-top: 0; font-size: 1.4em; color: #222222; line-height: 1.2; margin-bottom: 12px; font-weight: 600; } /\* 参数描述排版 \*/ .product-card .product-description { font-size: 0.92em; color: #444444; margin: 0 0 20px 0; line-height: 1.6; } .product-card .product-description strong { color: #333; font-weight: 600; } /\* 按钮 – 主题色 #0E6EB8 \*/ .product-card .view-product-button { display: inline-block; padding: 10px 28px; background-color: #0E6EB8; color: #ffffff; text-decoration: none; border-radius: 4px; font-size: 1em; font-weight: 500; text-align: center; transition: all 0.3s ease; align-self: flex-start; box-shadow: 0 2px 4px rgba(14, 110, 184, 0.2); } /\* 按钮交互 – 交互色 #f8b62a \*/ .product-card .view-product-button:hover { background-color: #f8b62a; color: #ffffff; transform: translateY(-1px); box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15); } /\* 响应式调整 \*/ @media (max-width: 768px) { .product-card { flex-direction: column; text-align: center; padding: 15px; } .product-card .card-image { width: 100%; max-width: 280px; margin-right: 0; margin-bottom: 15px; margin-left: auto; margin-right: auto; } .product-card .card-content { width: 100%; } .product-card .view-product-button { align-self: center; } } ![Satellite Type 4 Color Flexographic Printing Machine (200m/min, Water-based Ink, Non-woven)](https://zpflexopress.b-cdn.net/wp-content/uploads/2025/11/Satellite-Type-4-Color-Flexographic-Printing-Machine-200m-min-Water-based-Ink-Non-woven.webp) Satellite Type 4 Color Flexographic Printing Machine (200m/min, Water-based Ink, Non-woven) **Colours:** 4/6/8 Colors **Max. material width:** 850mm, 1050mm, 1250mm, 1450mm **Max. printing width:** 800mm, 1000mm, 1200mm, 1400mm **Printing length:** 340−1000mm **Printing speed:** 200m/min [ Learn More ](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/product/satellite-type-4-color-flexographic-printing-machine-200m-min-water-based-ink-non-woven.md) ## Conclusion As a paper bag manufacturing business, it is crucial to learn [**how to produce paper bags** ](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/taxonomy/product_cat/industrial-packaging-bag-flexo-printing-machines.md)commercially. This begins by determining the type of flexo printing machine or printer that suits your substrate weight, volume of run, and number of colors. Commercial companies like food establishments, grocery stores, and even online stores have turned to paper bags as their eco-friendly choice. Therefore, selecting the proper flexographic printer ensures efficient use of ink, quick changeover, and maintains accurate registration. RAZP holds [ISO 9001:2015 certification](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/page/quality.md), CE compliance, and National High-Tech Enterprise status. We have installed over 500 presses across 15 countries, delivering 50 new units annually. Our team provides B2B buyers with full support ranging from initial design to global maintenance. [Get a Quote](https://www.zp-flexopress.com/wp-content/uploads/wp-mfa-exports/page/contact.md)