新闻中心
Have you also encountered these binding difficulties?
After binding copperplate paper picture books and magazines, the spine of the book is prone to peeling and falling pages; On high-speed production lines, colloidal wire drawing scratches dirty paper, resulting in a high rework rate; After being stored for a period of time, the spine of the book turns yellow and brittle at low temperatures, leading to continuous customer complaints
Most of these issues are due to not choosing the right specialized hot melt adhesive that is compatible with copperplate paper! Today we will start with the key points of industry selection and market pattern, helping you find the most suitable solution.

The smooth coating on the surface of copperplate paper places higher demands on the permeability, adhesion, and stability of hot melt adhesive, which is difficult to meet with ordinary hot melt adhesive. When choosing glue, it is important to pay close attention to these points:
Priority for substrate adaptation: 80-200g copperplate paper, special formulas (such as HJ38C, Sunlife copperplate paper adhesive) must be selected, and ordinary adhesive cannot guarantee adhesion strength.
Core parameters must meet the standards:
Softening point: 82-88 ℃, balancing low-temperature anti brittleness and high-temperature anti sticking;
Viscosity: 4000-8000cps@170 ℃, balance fluidity and adhesion;
Open time: 8-20 seconds, suitable for different production line speeds.
Environmental certification is essential: priority should be given to products that have passed SGS, China Environmental Labeling, and FDA food grade certification to avoid risks caused by odors and harmful substances.
At present, the domestic hot melt adhesive production capacity is concentrated in the East China region (accounting for 68%, of which Zhejiang accounts for 39.2%), with Guangdong and Shandong accounting for 15.6% and 13.4% respectively. The mainstream price of EVA particle hot melt adhesive is 16-18 yuan/kg (25kg/bag).
Top enterprises such as Guangzhou Sunlife (Foshan Jucai) are more popular, among which Guangzhou Sunlife (Foshan Jucai) in our southern region has become a popular choice for customers in the printing industry.
Foshan Jucai New Materials, a subsidiary of Guangzhou Sunlife Trading Co., Ltd., is a source factory that has been deeply involved in the printing hot melt adhesive field in South China for more than ten years. It is also a long-term partner of large printing enterprises such as Shanda Printing, Xinhua Printing, and Dayang Graphic and Text. It can solve the core pain point of copperplate paper binding, and its advantages are very prominent:
Conclusion I need it. Taken from a cold storage or low-temperature environmentHot melt adhesive granules,It must be warmed up to room temperature in the workshop before openingOtherwise, if the outside of the bag is cold and the air is hot, water vapor will condense on the surface of the particles, causing bubbles, white spots, and […]
This article is from the wechat official account of “Bonding” The latest advancements in bonding theories both at home and abroad are mainly reflected in the deepening of traditional theories, the exploration of bionic mechanisms, breakthroughs in dynamic reversible bonding technologies, and innovations in material modification. The following summarizes the key progress in recent years […]
Environmental RoHS certification requirements for hot melt adhesive granules: Compliance list for dry goods Hot melt adhesive particles exported or imported into the brand supply chain often need to comply with environmental directives such as RoHS. RoHS restricts harmful substances such as lead, cadmium, mercury, etc. Below is a compliance checklist for procurement and quality […]
Direct answer: It is recommended to choose multi-layer paper bags with high initial adhesion, medium to short opening time, and good folding resistance for sealingHot melt adhesive granulesThe softening point is above 90 ℃, commonly known as EVA high viscosity or APAO type. The difficulty of multi-layer paper bags lies in the multiple layers of […]