A concise definition of pressure-sensitive adhesive

Pressure sensitive adhesive (PSA) is a material that can form a strong and long-lasting adhesion with a solid surface under slight pressure. It usually has the following characteristics: instant adhesion: PSA can achieve initial adhesion at the moment of contact with the surface of the object and reach maximum strength within a few seconds. No solvents or water required: Compared to other types of adhesives, PSA does not require the use of harmful chemical solvents or water to activate its adhesive properties. Easy to peel off: In most cases, PSA allows users to easily peel off the surface of the pasted object without damaging it. Single or multiple sided coating: According to application requirements, PSA can be uniformly or unevenly applied on one side, both sides, or multiple sides. Widely applicable: Due to its diverse characteristics, PSA has various applications in fields such as medical supplies, electronic products, automotive industry, and construction. The production process of PSA includes synthesizing polymers, adding plasticizers and other additives to adjust performance, and then coating the adhesive onto the substrate through roller coating, spraying, and other methods to dry and cure it. The common types of PSA include hot melt type, rubber type, and water-soluble type, each of which is suitable for specific occasions and requirements. For example, medical patches often use low allergenic acrylic PSA; High temperature resistant epoxy resin is used for fixing and packaging electronic components. With the continuous advancement of technology, new PSA products are also constantly emerging, which may have improvements in environmental protection, safety, and durability. For ordinary consumers, the most common ones are various convenience stickers, label paper, and phone protective films that use PSA. For professionals, selecting and using the appropriate PSA correctly is one of the key factors in ensuring engineering quality and efficiency.