Sinograce focuses on the development and production of water-based adhesives. To solve problems such as difficult label separation, adhesive residue, and reduced PET flake cleanliness during PET bottle recycling, Sinograce developed WM549 Water-Based Wash-off Label Adhesive. This product is mainly used for PP film labels applied to PET bottles. Under alkaline washing and recycling conditions, WM549 helps PP film labels separate from PET bottles, reduces adhesive residue, and improves the recycling quality of PET bottles. Sinograce Provides Wash-off Adhesive Solutions for PP Film Labels ✔ Suitable for PP Film Labels The adhesive is designed for PP film labels, meeting both labeling performance and recycling separation requirements for PET bottles. ✔ Designed for PET Bottle Recycling Applications Suitable for PET bottle label applications such as beverage bottles, personal care bottles, and food packaging bottles. ✔ Wash-off Separation Performance Under alkaline washing conditions, it helps PP film labels separate from PET bottles and reduces the risk of label and adhesive residue. ✔ Reduces Adhesive Residue on PET Flakes Helps reduce the impact of adhesive residue on PET flake washing, sorting, and reprocessing. ✔ Water-Based Eco-Friendly System Based on a water-based adhesive system, it better meets the trend of eco-friendly packaging and sustainable recycling. ✔ Customized Application Support Technical support can be provided according to PP film materials, coating processes, labeling conditions, and recycling test requirements. Recommended Product: WM549 Water-Based Wash-off Label Adhesive WM549 is a water-based wash-off label adhesive developed by Sinograce for PP film labels applied to PET bottles. It is suitable for PET packaging labels such as beverage bottles, food bottles, and personal care bottles, helping labels separate more easily during the recycling washing process. As PET bottle recycling requirements continue to increase, the selection of label materials and adhesives is becoming an important factor affecting recycling quality. Sinograce WM549 Wash-off Label Adhesive is suitable for PP film labels applied to PET bottles, helping labels separate more easily during recycling washing, reducing adhesive residue, and supporting high-quality PET bottle recycling.

PET packaging is widely utilized in the consumer goods market; however, the quality of recycled material is often compromised by label materials and adhesive residues. For brands and label manufacturers seeking to enhance the recyclability of their packaging, selecting adhesives that are compatible with existing recycling infrastructure has become a critical element of the packaging design process. During the washing phase of PET bottle recycling, the ability of labels to detach cleanly is a pivotal factor influencing the overall effectiveness of the recycling process. If adhesive residues remain on the surface of the PET flakes, it not only complicates the cleaning process but may also interfere with subsequent sorting and reprocessing stages. To address this challenge, Sinograce Chemical has introduced WM549—a water-based adhesive designed for washable labels. This product is specifically formulated for film labels on PET bottles; under alkaline washing conditions, it facilitates the separation of the label face stock from the PET substrate, thereby minimizing adhesive residue and supporting high-quality PET recycling. WM549 Product Advantages: Facilitates the clean separation of labels from PET flakes during the washing process. Minimizes adhesive residue, thereby enhancing the purity of recycled PET. Compatible with a wide variety of label face stocks, including clear films, white films, and metallized films. Suitable for packaging applications across various sectors, including food and beverages, home care, and personal care. Water-based formulation, aligning with the growing global trend toward eco-friendly packaging solutions. The sustainable development of PET packaging depends not only on the material used for the bottle itself but also—critically—on the choice of label materials and adhesives. Selecting appropriate washable label adhesives helps boost the efficiency of PET packaging recycling and drives the realization of high-quality "bottle-to-bottle" closed-loop recycling systems. Sinograce Chemical is dedicated to the long-term R&D and manufacturing of water-based products—including water-based polyurethanes, water-based acrylics, and water-based adhesives—providing comprehensive water-based chemical solutions for the labeling, packaging, printing, and coating industries. For more information, please visit: https://www.sinogracechem.com/

As carbon reduction and circular economy continue to gain momentum worldwide, the packaging industry is paying more attention to material recyclability and recycled material value. For PET bottles, food trays, and household product packaging, labels are not only used for brand display, but also play an important role in the recycling process. In traditional recycling systems, label adhesives that are difficult to remove may leave adhesive residue or label fragments on PET materials. This can reduce the purity of recycled PET and affect its reuse value. Therefore, wash-off pressure-sensitive label adhesives designed for PET recycling are becoming an important solution for sustainable packaging development. Sinograce Chemical WM549 Wash-off Pressure-sensitive Adhesive is a water-based acrylic pressure-sensitive adhesive developed for PET bottle labels, film labels, and recyclable packaging applications. It helps labels separate efficiently from PET bottles or trays during the washing process, reducing adhesive residue and improving the purity and recycling value of recycled PET materials . At the same time, WM549 can maintain good wash-off efficiency under relatively low-temperature washing conditions, helping reduce energy consumption in the recycling process. It is suitable for recyclable PET packaging applications such as beverage bottle labels, household product labels, food packaging labels, and film labels. The following image shows the key advantages of WM549 wash-off pressure-sensitive label adhesive in PET packaging recycling: WM549 wash-off pressure-sensitive adhesive helps PET packaging labels separate more efficiently during the washing process, reducing residue and improving the purity and recycling value of recycled PET materials. Sustainable Label Adhesive Solutions for Circular Packaging Through the continuous development of sustainable label adhesive solutions, Sinograce Chemical is actively supporting packaging materials to become more efficient, more environmentally friendly, and easier to recycle. We aim to make every label not only perform its basic bonding function, but also contribute to resource regeneration during the recycling stage. In this way, every PET packaging recycling process can create both environmental and economic value. In the future, Sinograce Chemical will continue to focus on packaging industry needs and end-use application scenarios. We will keep innovating in water-based acrylic pressure-sensitive adhesives, wash-off label adhesives, and recyclable packaging adhesive solutions, providing more reliable material support for circular economy and sustainable packaging development.

When manufacturing labels, the choice of adhesive backing is just as crucial as the face material and print quality. Whether a label adheres firmly, resists edge curling, or leaves behind residue upon removal often depends heavily on the adhesive applied to its backing. The adhesive commonly used on the back of labels is known as pressure-sensitive adhesive (PSA). This type of adhesive requires neither heat nor additional water; it bonds to a product's surface simply through light manual pressure. The most common types of pressure-sensitive adhesives used for labels include water-based, solvent-based (oil-based), and hot-melt adhesives. Water-Based PSAs: The Preferred Choice for Standard Labels. For the majority of printed labels, water-based acrylic pressure-sensitive adhesives are highly recommended. Using water as a dispersion medium, this type of adhesive is environmentally friendly and features low VOC (Volatile Organic Compound) emissions, making it well-suited to meet the current eco-friendly production standards of the packaging and labeling industries. It can be applied to a wide variety of materials, including paper labels, BOPP, PET, and PVC films, as well as labels for daily chemical products, food packaging, and logistics. The advantages of water-based acrylic PSAs include stable coating application, uniform adhesive layers, excellent transparency, resistance to yellowing, and superior aging resistance. For standard label applications, this adhesive strikes an optimal balance between tack strength, cost-effectiveness, and environmental friendliness, resulting in a very broad scope of application. Solvent-Based PSAs: For Labels with More Demanding Requirements Solvent-based pressure-sensitive adhesives—also referred to as oil-based adhesives—are characterized by their strong bonding strength and superior resistance to water, chemicals, and extreme temperatures (both high and low). If labels are intended for use in challenging environments—such as outdoors, on chemical drums, on automotive components, or on electronic devices—solvent-based adhesives offer distinct advantages. However, because they contain solvents, these adhesives impose stricter requirements regarding production environments, safety management, and environmental emission controls; they also tend to be relatively more expensive. Consequently, solvent-based adhesives are generally not the first choice for standard printed labels. Hot-Melt Adhesives: Commonly Used for Logistics and Carton Labels Hot-melt adhesives also play a significant role in the labeling industry, particularly for applications such as express shipping labels, carton labels, general logistics labels, and cold-chain labels. They possess strong initial tack (instant adhesion), making them ideal for bonding to rough surfaces—such as corrugated cardboard boxes—and are also well-suited for high-speed coating and production processes. However, in terms of transparency, heat resistance, aging resistance, and...