The core structure of foam tape is very simple, which consists of three parts: foam substrate, pressure-sensitive adhesive layer and release protection layer, and its core performance is completely determined by foam substrate. There are three mainstream foam tape substrates in the market, namely PE foam, EVA foam and PU foam. The structure, hardness, resilience and waterproofness of the three substrates are different, which directly determines the use scene and service life of the tape, and is also the core reason for the price and quality difference of the foam tape in the market.

PE foam tape is the most commonly used and versatile category in the market at present. It adopts independent closed-cell structure, and the internal pores are not connected with each other. Its biggest advantages are extremely low water absorption, excellent waterproof and moisture-proof performance, stable structure, aging resistance and corrosion resistance, and it is not easy to deform and crack after long-term use. The substrate has moderate hardness and high flatness. After being matched with the pressure-sensitive adhesive layer, it has even adhesion and stable adhesion, which can not only meet the fixed adhesion of light objects, but also meet the conventional sealing and shock absorption requirements. Because of its balanced comprehensive performance and high cost performance, PE foam tape is also the most widely used foam tape in civil and industrial fields, covering almost most conventional bonding scenes.

EVA foam tape has stronger toughness, softer overall texture and excellent compression performance, and its biggest feature is excellent filling. For the bonding surface with uneven surface, fine cracks and height difference, EVA foam tape can compress itself to fit the base surface, fill the gaps and make the bonding more compact and tight. However, it has obvious short board, which is easy to produce irreversible deformation after long-term continuous compression, and its rebound performance is weak, so it can not withstand gravity pull and extrusion for a long time. Therefore, this kind of adhesive tape is more suitable for static filling, gap sealing and anti-slip buffering scenes, and is not suitable for load-bearing fixation and long-term stress conditions. PU foam tape is the softest of the three kinds of base materials and has the best cushioning and shock absorption effect. It has an open structure, delicate touch, excellent compression resilience and strong impact resistance. It is mainly used for the protection, shock absorption and noise reduction of precision objects, especially for the fixed protection of fragile and easily worn products such as electronic components and precision ornaments. However, due to the open structure, its waterproof performance is poor, water vapor is easy to penetrate into the substrate, and the adhesive layer is prone to moisture and bonding failure in wet environment, so it is only suitable for dry indoor and precision protection scenes, not suitable for outdoor and wet environment.

From the perspective of adhesive layer technology, the mainstream production technology of industrial mass-produced foam tape on the market is hot melt adhesive coating technology. Hot melt adhesive contains no solvent, its components are pure and stable, the production process does not need drying procedure, and its production efficiency is high, and it will not affect the shrinkage and deformation of foam substrates. It is suitable for the composite production of various foam substrates and is the most versatile and stable adhesive layer process in the industry at present. Soft foam base material is special, with poor tension controllability and easy deformation, which requires high precision, temperature control and feeding stability of coating equipment, and it is difficult for ordinary general coating equipment to adapt. Rui 'an Jiayuan Machinery Co., Ltd. has been deeply involved in the field of hot melt adhesive coating equipment for many years, focusing on optimizing the equipment performance according to the production pain points of foam soft substrates, adapting to the coating production of all kinds of foam substrates such as PE, EVA and PU, and solving the common process defects in traditional production from the equipment level. The foam tape with hot melt adhesive technology has outstanding overall performance stability. The colloid is closely combined with the foam substrate, the thickness of the adhesive layer is uniform, there is no solvent residue, and the finished product is not prone to common problems such as delamination, glue overflow, local degumming, etc. The adhesive strength and weather resistance are uniform and uniform, and the batch consistency is better, which can meet the long-term use requirements of most scenes such as routine home fixing, industrial assembly and outdoor use. Rui 'an Jiayuan Machinery Co., Ltd. has optimized the tension control system and segmented temperature control system of the equipment according to the production characteristics of foam tape. The feeding process is low in tension and tension, which can effectively avoid the problems such as stretching deformation of foam substrate, curling of coil, and different widths. At the same time, it accurately controls the whole process of melting, coating, cooling and curing of hot melt adhesive, making the penetration depth of adhesive layer controllable and the coating thickness uniform, ensuring the quality stability of foam tape products from the production source, and helping adhesive products enterprises to effectively reduce the defective rate.