Acrylic pressure-sensitive adhesive is widely used in multiple industries due to its relatively low production cost. For this type of product, various properties ranging from clean removability to extremely high peel strength can be achieved through adjustments in formulation and manufacturing processes. Based on these advantages, it is particularly widely used in the label and packaging industries. What is acrylic pressure-sensitive adhesive psa ? Acrylic pressure-sensitive adhesive is a product that uses acrylic polymers as the main binder. The molecular weight and Tg in its formulation are relatively low, enabling it to exhibit viscoelasticity within the ambient temperature range The key characteristics of these acrylic polymers are as follows: - Softness - Ability to wet and adhere to the surface of substrates - Capacity to fill uneven surfaces Acrylic polymers are used in multi - layer laminations and structural sealing. Currently, the most common type of acrylic pressure - sensitive adhesive in the market is the water - based emulsion type. These emulsions are thermoplastic systems that cross - link under certain usage conditions. How is acrylic pressure - sensitive adhesive produced? Acrylic pressure - sensitive adhesive is composed of one or more acrylic monomers. These monomers have multiple functional groups. During the polymerization process, these monomers form high - molecular - weight products. This is done to prepare binders with different cross - linking properties. These mixed monomers can be cured by ultraviolet light, heat, or chemical catalysts. These adhesives can be cured either on the coating line or off the coating line. On - line curing-using some thermosetting acrylics, cyanoacrylates, or anaerobic acrylates Off - line curing-using high - molecular - weight monomers The characteristics of acrylic adhesives lie in their diversity and wide applicability. Therefore, there are various solutions, including solvent - based solutions, water - based emulsion solutions, and solvent - free multi - monomer mixed solutions. Typical properties Acrylic pressure - sensitive adhesives have a wide range of application scenarios for the following reasons: - Saturation of the polymer - Better oxidation resistance than other adhesives except for silicone pressure - sensitive adhesives - Good adhesion to many substrates, including metals, glass, and various high - surface - energy plastics - Overall balance of cohesive force - Essentially thermoplastic and polar - Softening upon heating - Requiring less plasticizer Sinograce Chemical produces water-based acrylic pressure-sensitive adhesives for use in label adhesives and tape adhesives, as well as various additives. Welcome to inquire.

Sinograce Chemical to Exhibit at Labelexpo Europe 2025 in Barcelona, Spain Our team will be present to discuss business opportunities and partnerships. Event Details: About Sinograce Chemical: Sinograce Chemical provides product solutions that help Customers . Media Contact: Contact Name : Vivi Email :sales@sinogracechem.com Phone :+8615755193346

1. The influence of polymer monomers on the glossiness of water-based Overprint Varnishes The polymer monomers selected for the film-forming resin in the water-based varnish formulation have a significant impact on the glossiness of the finished product. In actual production, multiple monomers are usually used for copolymerization. The acrylic resin used in water-based varnish can be made from monomers such as methyl methacrylate, styrene, acrylic methyl ester, acrylic β-hydroxypropyl ester, and acrylic. Increasing the dosage of methyl methacrylate and styrene leads to a harder coating with good glossiness, but it is also more brittle and has poorer flexibility and solubility resistance. 2. The proportion of water-soluble resins and emulsions in the varnish formula Increasing the dosage of emulsions can enhance the glossiness of the varnish, but it will reduce the leveling and processing suitability of the varnish; increasing the dosage of water-soluble resins can improve the leveling and processing suitability of the varnish, but the glossiness will decrease. 3. The influence of leveling on the glossiness of water-based varnish Leveling is an important factor affecting the glossiness of water-based varnish. Leveling is influenced by product viscosity, pH value, and surface tension. Choosing an appropriate leveling agent can effectively improve the construction leveling performance. If the varnish has good leveling, it can quickly level before the coating dries, forming a smooth surface, and the coating will have high glossiness; if the varnish does not dry before leveling, it will leave some streaks, sand holes, etc., reducing the glossiness. 4. The influence of pH value on glossiness The pH value of water-based varnish should generally be controlled between 8 and 9. The pH value is mainly adjusted with ammonia water. If the pH value is too high, the viscosity of the varnish will decrease, affecting the glossiness and causing a slower drying speed and poorer water resistance; if the pH value is too low, the viscosity will increase, and ammonia water will volatilize relatively quickly during leveling, causing the leveling process to end prematurely and affecting the final film formation glossiness. 5. The influence of viscosity and solid content of the finished product on glossiness The viscosity of the finished product has an important impact on the leveling, wetting, and other properties during coating application. The surface of the printed product has a certain absorption capacity for the varnish, and the absorption rate of the printed surface for the varnish is proportional to the viscosity value of the varnish. If the viscosity value of the varnish is too small, when coating on paper with a high absorption rate, it will cause too large a change in the viscosity of the varnish during leveling, resulting in premature ending of leveling, causing uneven coating on the surface of the printed product, and affecting the smoothness and glossiness o...

At present, water-based inks are mainly used for flexible and recessed plate printing. Among these, most of them are used in food packaging, tobacco and alcohol, pharmaceutical factories, and children's toys, occupying a considerable market share. Composition of water-based inks Water-based inks are made by compounding and grinding water-based resins, pigments, and solvents. Water-soluble resins mainly play the role of a binder in the ink, enabling the pigment particles to be uniformly dispersed, making the ink have certain fluidity, generating adhesion to the substrate material, and forming a uniform film layer after printing. Characteristics of water-based inks 1. Water-based inks are a new type of environmentally friendly printing ink with good adhesion, excellent flexibility, good elasticity, anti-retraction, water resistance, excellent printing performance, overprinting performance, and high solid content. 2. They are non-flammable, have stable ink properties, do not corrode the printing substrate, prevent color migration, have strong water resistance, dry quickly. They can not only reduce the hazards caused by static electricity and flammable solvents, but also reduce the toxicity of the printed surface residues. Moreover, cleaning the printing equipment is very convenient, so they are particularly suitable for the packaging industries of food, beverages, and pharmaceuticals. 3. The solvents of water-based inks are water and a small amount of alcohols. They have wide applications in the printing industry of T-shirts and other pure cotton and elastic fabrics, shoe insoles, etc. The usage instructions for water-based inks Applicable screen mesh: 40-100T (water-based silk screen plates) Applicable scraping: It is recommended to use 65-70 degree polyester scraping or water-based special scraping Coating area: 25-35 square meters per kilogram Sizing agent: Neutral water Washing agent: Ordinary tap water Requirements for mixing water-based inks Before use, the viscosity of the ink needs to be adjusted appropriately according to different printing requirements. When adjusting, pay attention to adding water as much as possible to be neutral to slightly alkaline, otherwise it will affect the viscosity and drying speed of the water-based ink. At the same time, the amount of diluent (water) added cannot exceed 3%, otherwise the color concentration of the ink will be reduced. Requirements for printing with water-based ink. Due to the characteristics of water-based ink, it is difficult to control the drying speed. Therefore, it is suitable for rapid printing. If the printing speed is too slow, it is likely to cause the ink to dry quickly on the screen plate and block the water. Requirements for drying of water-based ink. Water-based ink mainly dries naturally, but after printing, it is better to let it dry for 8 hours in the natural environment and then bake it for about 1 minute at 130 degrees. Usage of water-based ink additives Slow-drying agent: Used...