Water-based PU adhesive Advantages and disadvantages for fabric printing
Water-based PU is a new and more environmentally friendly adhesive compared to acrylic resin, because most acrylic resins contain methylol acrylamide. Loss of water and cross-linking during use will produce formaldehyde, causing air pollution, endanger human health. Water-based PU has the advantages of high bonding strength, good flexibility, excellent frost resistance, abrasion resistance, and solvent resistance. When used in fabric printing, it can give the printed pattern excellent frost resistance, wear resistance, and softness. , resilience, dryness, etc.
Since water-based PU mostly uses self-emulsification method to obtain emulsion, a certain amount of Hydrophilic group, which will lead to a reduction in the water resistance of the water-based PU film; in addition, water-based PU is used as a fabric printing adhesive, the price is higher, and the washing fastness and wet rubbing fastness need to be improved.
In order to overcome this defect, many scholars have conducted research on water-based polyurethane for pigment printing. We researched and developed a self-made water-based PU printing cross-linking agent, and at the same time synthesized a hybrid polyurethane adhesive with better water resistance, which is ideal for paint printing and anti-wrinkle and anti-pilling finishing. We also studied the use of water-based polyurethane adhesives in paint printing. application process, including the impact of adhesive dosage, cross-linking agent dosage, optimal baking temperature and time on fabric printing performance; self-synthesized water-based polyurethane for pigment printing, and examined its rubbing fastness, hand feel, and soaping fastness and other indicators, which meet the national standards (wet rubbing fastness is above level 2, dry rubbing fastness is level 2-3); through molecular design, water-based PU with excellent performance was synthesized, and polyester raw materials, synthesis process, R value, The effects of neutralization degree and DMPA percentage on the performance of pigment printing adhesives were investigated. The polyurethane was also modified with silicone/epoxy composite to prepare a pigment printing adhesive with better comprehensive performance. 
At present, water-based PU adhesives used for pigment printing are generally A curing agent must be added to achieve ideal washability. Excessive curing agent dosage will affect the softness of the printing feel.
Recently, in the Textile City market, sales of various types of coated clothing fabrics, coated decorative fabrics, coated calendered fabrics, artificial leather, and artificial leather composite fabrics based on polyester filaments are still going smoothly. Business stores show that most polyester filament base coated fabrics and artificial leather are still relatively limited in the spot market of small and medium-sized business stores. However, the spot availability of popular creative varieties of some large professional businesses has increased compared with small and medium-sized businesses. The sales volume of mass products is insufficient, and marketing is divided. Some small and medium-sized operators still have relatively insufficient sales in the past few days. However, some front-store and back-factory cloth companies and large-scale operating stores have partially smooth spot transactions, and they can accept orders in small and medium batches. , the added value of some large professional operators’ creative fabric products with better quality has still improved.
In the recent market, the base fabrics of coated PVC, PU, PA fabrics and oil-surface calendered fabrics are made of polyester 68D matte FDY-150D matte FDY fine Partial transactions of small-type varieties and glossy FDY and DTY fine-type varieties were relatively smooth. Some thin coated fabrics have been placed in bulk orders by luggage processing companies and secondary market wholesalers in recent days. Rubberized jacket fabrics and luggage fabrics interact, and the market demand is still growing in some parts. The marketing of all-polyester DTY low-elastic silk light-coated fabrics, pure cotton light-coated fabrics, nylon-polyester light-coated fabrics, and nylon-cotton light-coated fabrics is partially successful. Because the fabrics have both drape and thickness, and the interaction between thickness and thickness, some front-store and back-factory-style fabric industries The company and large-scale operating stores continue to have many models favored by counterpart merchants, and market sales hot spots have increased in some areas.
Various types of coated fabrics and drip plastics based on polyester filament Fabric, coatingPartial sales of calendered fabrics, artificial leather, and artificial leather composite fabrics showed a fluctuating upward trend, with creative coated fabrics winning in early winter due to their high quality. Coated fabrics with polyester filament as the base fabric still account for the majority of the transaction share, and polyester base coated fabrics are the main support for active marketing.
