01. In the textile industry, fabric coating finishing technology is one of the important processes for improving fabric performance and expanding its application range. Waterborne polyurethane (WPU), with its excellent film-forming properties, good flexibility, and stable chemical characteristics, is gradually becoming one of the core materials in this field. This article will systematically introduce the main characteristics, commonly used processing methods, and innovative applications of waterborne polyurethane in fabric coating finishing, as well as its application in functional textiles. 02. Waterborne polyurethane coatings possess several excellent physical properties. The resulting coating film exhibits high flexibility, resisting cracking even when the fabric is bent or stretched. Through reasonable formulation design, this coating can also demonstrate good water resistance and chemical resistance, effectively extending the fabric's service life. Simultaneously, the microporous structure formed by waterborne polyurethane balances air permeability and moisture permeability, allowing the coated fabric to maintain comfort while possessing functionality. 03. In terms of functional customization, waterborne polyurethane coatings demonstrate strong flexibility. By adding nanomaterials such as TiO₂ or silver ions, as well as various functional additives, fabrics can be endowed with additional properties such as antibacterial, UV resistance, or flame retardancy. The coating thickness, gloss effect (matte or high gloss), and surface texture can also be adjusted according to requirements to meet diverse product design needs. 04. Waterborne polyurethane coating technology is highly adaptable and can bond well with a variety of textile substrates, including natural or synthetic fibers such as cotton, polyester, nylon, and silk, and even nonwoven fabrics. In terms of processing methods, it can be combined with traditional textile coating processes such as padding, spraying, and coating, facilitating large-scale application on existing production lines.

In the field of drawing, markers have always been an indispensable tool. They come in two types: water-based and oil-based. Water-based marker ink does not contain oil-based components, similar to colored pencils, and has no irritating odor. Oil-based markers, on the other hand, mostly contain oil-based solvents, which are volatile and produce an irritating odor. Currently, the demand for water-based markers is increasing. Water-based markers are highly safe, simple to use, and washable, effectively cultivating children's interest in drawing and creativity, thus enjoying great market popularity. However, there are many problems with using traditional dyes in water-based markers. In terms of safety, it is difficult to meet stringent standards, especially for products used by children, posing potential risks. Regarding washability, traditional dyes are difficult to remove completely from skin, clothing, tabletops, and other surfaces, causing considerable inconvenience to users. Addressing these industry pain points, Sinograce Chemical has launched a new product: a water-washable macromolecular liquid colorant for markers. Advantages: Excellent washability Meets EU safety standards Bright and clear colors Completely compatible with all colors Macromolecular liquid colorants possess numerous core advantages that strongly support the improvement of water-based marker quality. Super washability, worry-free cleaning Super washability is a major advantage of macromolecular liquid colorants. After staining skin, clothing, desktops, etc., it can be easily removed with just water, leaving no trace. This characteristic solves the problem of traditional dyes being difficult to remove, which is especially important for children's markers. Parents no longer need to worry about their children drawing on skin and furniture. If children accidentally draw on clothes, ordinary detergent can completely remove it without damaging the clothing. Super high safety, EU standards Sinograce Chemical's macromolecular liquid colorant has a special molecular structure that cannot be absorbed by the human body, ensuring the safety of users from the source. The product has passed the EU EN71-3 safety testing standard and is free of heavy metals. This means that whether used by children or professionals, there are no health concerns. Especially for children, there is an inherent risk of skin contact or even accidental ingestion. The high safety of the macromolecular liquid colorant greatly reduces these risks, giving parents and users greater peace of mind. Bright and Diverse Colors The macromolecular liquid colorant offers bright, full, and transparent colors with rich hues and excellent tinting strength, producing perfect color effects that make artwork more vivid. Moreover, the various colors are completely compatible without grinding, making it easy for users to mix colors and create more unique hues. In actual drawing, users can easily mix different colors to achieve their d...

In household cleaning and personal care products, color not only enhances the visual appeal but also reflects consumers' lifestyles and aesthetic preferences to some extent. However, traditional colorants often suffer from problems such as easy fading and difficulty in rinsing, affecting the product's aesthetics and potentially damaging fabrics, failing to meet the diverse needs of modern consumers. This issue of Discover New Raw Materials shares a macromolecular colorant applied by Caihua Technology to household cleaning and personal care products. It features brightening, easy rinsing, and color protection, effectively protecting the original color of fabrics, reducing fading during washing, and giving products rich visual depth. Macromolecular Colorant in Daily Chemicals A brightly colored and transparent macromolecular colorant (concentration 0.1%→0.01%), giving products a rich array of colors. Raw Material Category:Colorant Raw Material Colors:Orange, Crimson, Scarlet, Blue, Yellow, Rose Red, Peach Red, Sky Blue, Flame Red Raw Material Form: Liquid Efficacy Claims:Brightening, Easy to Rinse, Color Protection Recommended Dosage: Light colors 0.01%~0.05%; Dark colors 0.1%~0.3% Application Categories: Laundry detergent, laundry pods, toilet cleaner, laundry powder, hand soap, etc. Raw Material Characteristics 1. Miscible with water 2. Resistant to acids and alkalis 3. Highly washable 4. Resistant to oxidation Sinograce Chemical produces new pigment materials and macromolecular colorants for household cleaning and daily chemical products.

Polyurethane comes in many varieties, including one-component, two-component, rigid, and elastic. However, the most important characteristic of polyurethane is its solvent resistance. Acrylic acid comes in water-based, oil-based, and other varieties, but acrylic acid is primarily solvent-resistant. I. Basic Concepts of Acrylic and Polyurethane Acrylic acid is a monomer that generally has a strong, pungent odor. It exhibits excellent adhesion, light stability, weather resistance, and corrosion resistance, and is widely used in coatings, adhesives, inks, and classifiers. Polyurethane is a polymer material made through the polymerization of monomers such as isocyanates and polyols. It possesses excellent physical and chemical properties and good processability, and is widely used in a wide range of applications, including construction, automotive, and aviation. II. The Difference Between Acrylic and Polyurethane 1. Physical Properties Acrylic acid is a liquid monomer with low density and surface tension, making it difficult to solidify and volatile. Polyurethane, on the other hand, is a solid polymer with high density and hardness. 2. Chemical properties Acrylic acid is highly reactive and easily self-polymerizes to form polyacrylic acid. Other functional groups also react easily with it, such as alcohols and amines. Polyurethane is relatively more resistant to the influence of groups, and has improved hardness, strength, toughness, and reliability. 3. Application areas Applications of acrylic acid: (1) Preparation of polymers through homopolymerization or copolymerization, used in coatings, adhesives, solid resins, molded plastics, etc. (2) Preparation of acrylic resins, rubber synthesis, coating preparation, and pharmaceutical industry. (3) Warp yarn sizing (4) Adhesives Applications of polyurethane: (1) Mainly used in construction, automobiles, aviation industry, and structural materials for thermal insulation. (2) Mainly used in the shoemaking industry and medical industry.