Company News

Sealing temperature is the most critical yet often overlooked parameter in the process of producing flexible packaging bags. Incorrect setting of sealing temperature can result in weak seals leading to leakage, or even burning through the film, causing entire batches to be scrapped. Different materials have significantly different sealing temperature requirements, with PE, PP, CPP, metallized film, and aluminum composite film each having their own characteristics. This article systematically explains the principles of sealing temperature, the typical sealing parameter ranges…

Common quality issues in packaging printing mainly fall into three categories: color difference, registration error, and color bleed. Whether it's gravure printing, flexography, or digital printing, these problems are difficult to completely avoid. Many buyers discover color mismatches or misaligned patterns only after receiving the bulk order, leading to returns and reprints that delay delivery and increase costs. This article takes the perspective of factory quality inspection to thoroughly explain the causes of common quality issues in packaging printing and…

Food packaging companies often face a common confusion: customers require compliance with national standards, but there are so many standard documents available—GB, GB/T, industry standards, and enterprise standards. Which one takes precedence? In reality, the food packaging standard system is not as complicated as it seems. It resembles a three-tier pyramid: national standards at the top, industry standards in the middle, and enterprise standards at the bottom. The hierarchy is clear, and they complement each other. Understanding this system not…

First time purchasing custom packaging, most people will ask the same question: why is there a setup fee? Many customers feel uneasy about paying a fee for something they haven't even produced yet, as it's invisible and uncertain. In reality, the setup fee is a standard pricing rule in the flexible packaging industry, corresponding to the actual manufacturing costs of the plate, plate material, and molds. Understanding the composition of the setup fee not only helps you understand the quotation,…

Post-printing and lamination processes are the entire sequence that transforms the printed and laminated film roll into the final consumer-ready bags. These steps are often overlooked by buyers. Customers usually focus on the printing quality and design, but they often overlook the critical role of cutting, bag forming, and inspection in determining production yield, sealing quality, and delivery time. This article takes common bag types such as three-side sealed bags, stand-up bags, and zipper bags as examples to comprehensively break…

How to choose a packaging bag manufacturer is one of the most frequently asked questions among food, daily chemical, and e-commerce brands. Many customers find that when inquiring about prices, the cost of similar specifications of stand-up bags, aluminum foil bags, and three-side sealed bags can differ by 10% to 20% between manufacturers in the Yangtze River Delta and the Pearl River Delta. The minimum order quantity, delivery time, and service methods also vary. Based on years of production and…

Vacuum packaging bags: vacuum sealing

Product packaging design is not as simple as drawing a visually appealing picture. As a flexible packaging factory that deals with composite films, printing rollers, and bag-making machines every day, we've seen too many cases where the design effect picture looks amazing but ends up with countless problems in practice: bags that can't stand upright, zippers that don't seal properly, color deviations that are severe, and costs that are several times higher than expected. In this article, we'll explain from…

How to choose packaging printing processes directly affects the cost, effectiveness, and delivery time of packaging. However, many brand owners have suffered losses in the printing stage: either they chose inappropriate processes to save costs, leading to color distortion, or they spent budgets on invisible areas in pursuit of effects. The four main printing processes—gravure, flexography, digital, and screen printing—each have their own suitable applications. Choosing the wrong process isn't just a matter of extra cost; it can also affect…