PA-8220 is a water-based,environmentally friendly acrylic emulsion specifically developed for grinding gravure film ink pastes. It can be used for grinding and dispersing various pigments, exhibiting excellent pigment dispersibility and color development, as well as superior resolubility and anti-tack properties. It is also a high-quality resin for inks used in high-end applications such as paper and cigarette packaging. Performance Indicators Appearance: Semi-translucent liquid Solid content/%:40±1 Viscosity (25℃, mPa·s): ≤3000 pH value: 7.5-8.5 Solvent (carrier): Water Ionicity: Anionic Glass transition temperature/℃: 25 PA-8220 features low odor and low VOC, good alcohol compatibility, excellent pigment dispersibility, and good anti-tack properties, making it an ideal choice for grinding and dispersing various pigments and a high-quality resin for inks used in high-end applications such as paper and cigarette packaging.

In the printing industry, the demands for waterborne coating performance, especially high-gloss applications, are increasingly stringent. Single-component waterborne acrylic emulsion systems often suffer from limitations in balancing key performance characteristics when meeting high-end requirements. To address this, Sinograce Chemical has developed a high-performance emulsion combination with complementary properties: a high-gloss film-forming emulsion and a high-gloss hard non-film-forming emulsion. Through scientific compounding technology, the two work synergistically to effectively overcome the performance limitations of a single system, significantly improving the overall performance of printed materials. This combination solution excels in both high gloss and excellent adhesion! 1. Product Introduction Water-based high gloss varnish (7052) - Water-based, low odor - High gloss and high transparency - Good wear resistance - Anti-fouling and anti-blocking Applications - Packaging of tobacco / wine / food / medicine, book covers 2. Product Characteristics Gloss This product achieves stable high gloss (80°~85°), meeting the high gloss requirements of high-end packaging, labeling, and other fields. Abrasion Resistance Excellent abrasion resistance, strong resistance to scratches and abrasion, protecting surface integrity. Anti-adhesion Good anti-sticking properties, effectively preventing printed materials from sticking or ink transfer under stacking or temperature and humidity changes, keeping the surface clean. Color Development Excellent color development performance, high color reproduction, and rich colors in printed patterns. Drying Speed The drying time is set reasonably, ensuring sufficient film formation and stable performance of the coating while meeting production efficiency requirements. 3. Product Applications Suitable for formulating water-based high-gloss varnishes, water-based aluminum foil varnishes, water-based clear varnishes, water-based flexographic and gravure inks, water-based decorative paper inks, etc. Water-based high gloss varnish (7052) is an acrylic emulsion suitable for use in water-based high-gloss varnishes and inks. It boasts excellent gloss and transparency, and superior adhesion, making it an ideal choice for your ink and varnish raw material applications. Q: Can you provide samples for testing? A: Yes, you can contact our sales manager at +8615755193346 to obtain samples free of charge. Q: Can you customize according to your requirements? A: Yes, we have a professional laboratory and can adjust the formula according to your actual application requirements at any time.

In many applications, acrylic adhesives do not require the addition of tackifying resins to improve pressure sensitivity, but in most cases, they are necessary: To increase initial tack and peel strength To improve adhesion to low surface energy materials Tackifying resins are commonly used in acrylic emulsion systems, such as paper labels and packaging tapes. They improve peel strength on difficult-to-bond surfaces, such as plastic films and biaxially oriented polypropylene (BOPP) films. The table below shows the typical characteristics of adding 40 parts rosin ester. It can be noted that initial tack and peel strength are significantly increased, but shear strength is reduced. This is due to a decrease in modulus and softening. Tackifying resins can sometimes also reduce the cost of the final adhesive product. A typical addition amount is 30-40% by weight. Tackifying resins with melting points significantly higher than the polymer's glass transition temperature can improve adhesive strength but reduce tackiness. Resins with lower melting points can increase adhesive tack and flexibility but sacrifice creep and shear strength. Tackifying resins are responsible for regulating the initial tack, peel strength, and shear strength of adhesives, and a trade-off must be made among various aspects of the system. The Effect of Tackifying Resins on Tg Although tackifying resins lower the modulus and make the system more flexible, they can generally increase the glass transition temperature by reducing the rubber plateau. Since viscosity is measured by the energy required for failure, the adhesive needs a high modulus at both strain rate and strain amplitude during failure. Tackifying resins increase the glass transition temperature of the elastomer, giving the adhesive mixture a high modulus at high strain rates and room temperature. Therefore, tackifying resins increase the modulus at low temperatures, short times, and high frequencies, but decrease the modulus at high temperatures, long times, and low frequencies. Tackifying resins used in acrylic emulsions need to be compatible with the base polymer resin and the surfactant system. Pre-emulsified tackifying resins can be used in aqueous systems. Rosin and C5/C9 petroleum resins are common products. Sinograce Chemical produces water-based tackifying resins for use in acrylic emulsion systems and water-based rosin for use in various adhesives.

Polyurethane (PU) can transform into a strong adhesive, firmly bonding tiles to walls; it can also become plastic parts like phone cases and keyboard keycaps; and even become shoe soles and sealing strips, exhibiting elasticity comparable to rubber. Why can the same material freely switch between the seemingly unrelated fields of "adhesive, plastic, and rubber"? Today, we'll uncover the secret of this "versatile" material by delving into the underlying logic of its molecular structure. What are the essential differences between adhesive, plastic, and rubber? Don't rush to say "you can tell from the application." From a materials science perspective, their core differences lie in their molecular chains: Material  type Core Features Essence Key features at the molecular level Glue Materials that can actively wet interfaces, bond with interfaces through chemical/physical interactions, and ultimately solidify to form stable bonds. Materials containing polar groups (such as -NH-, -COO-), easily forming hydrogen bonds or chemical bonds; capable of forming network structures through cross-linking reactions. Plastic Materials with a certain degree of rigidity, capable of maintaining their shape and not easily deformed under stress. Molecular chains arranged regularly (crystalline) or forming cross-linked networks, with restricted chain segment movement and small free volume. Rubber Materials with high elasticity, capable of large deformations and rapid rebound, and not easily permanently damaged after deformation. Molecular chains soft (low Tg), with free chain segment movement; possessing moderate cross-linking or physical anchoring points to restrict excessive chain segment movement. And polyurethane happens to have the "code" for all three properties written into its molecular structure. The Molecular Structure of Polyurethane The molecular chain of polyurethane consists of two key structural parts: Soft segments: usually derived from long-chain polyols (such as polyethers and polyesters), like soft ropes, can swing freely, giving the material flexibility and elasticity. Hard segments: Formed by the reaction of isocyanates and chain extenders, these segments have short, rigid molecular chains and can cluster together via hydrogen bonds to form crystalline regions, resembling small pebbles that provide strength and stability. These two types of segments are covalently linked, yet they behave like oil and water, "not interfering" with each other—soft segments aggregate together, while hard segments clump together, forming a "microphase separation" structure. It is this structure that allows polyurethane to achieve "free adjustment" of its properties: add more hard segments for a harder texture, and increase the proportion of soft segments for a softer texture. Why can it be used as an adhesive? Many types of tile adhesive used in home renovations and structural adhesives used in carpentry are made of polyurethane. Its strong adhesion relies on two ...