TPU hot melt adhesive film is a hot melt adhesive film made of thermoplastic polyurethane (TPU) material. The following is a detailed introduction to it:
1. Product characteristics
Environmentally friendly and harmless: The main component of TPU hot melt adhesive film is thermoplastic polyurethane material, which is non-toxic and odorless, and will not cause harm to the human body and the environment. At the same time, no harmful gases or substances will be produced during production and use, which meets environmental protection requirements.
Wide bonding range: TPU hot melt adhesive film has strong adhesion properties and can bond a variety of materials, such as cloth, non-woven fabrics, leather, paper, metal, plastic, etc. Its high bonding strength can meet the requirements of various different composite processes.
Easy processing: TPU hot melt adhesive film is easy to process. It can be melted and bonded to the required material by heating. The low melting temperature and fast melting speed can greatly improve production efficiency.
Strong weather resistance: TPU hot melt adhesive film has good weather resistance and can be used in harsh environmental conditions such as high temperature, low temperature, humidity, and dryness, and maintain good bonding and mechanical properties.
Good elasticity: TPU hot melt adhesive film has a certain elasticity, which can adapt to the deformation and expansion of the material, ensuring the stability and durability of the bonding part.
2. Application fields
TPU hot melt adhesive film is widely used in many fields due to its unique properties:
Clothing field: used for the bonding and lamination of clothing, such as seamless hemming and trademark lamination of seamless underwear, ski suits, assault jackets and other clothing.
Electronic field: used for positioning and fixing of various electronic products, such as sensors, inverters, displays, etc. Because of its excellent weather resistance, water resistance, chemical corrosion resistance and insulation performance, it can ensure the stable operation of electronic equipment.
Automobile manufacturing field: used for bonding automotive interior parts, strengthening body structure and sealing doors and windows. Its heat resistance and chemical corrosion resistance are widely used in the automotive field.
Other fields: It is also used in database software transaction processing, elevator systems, military equipment, automation and home appliances, such as PCB welding protection to protect circuit boards and solder joints from damage; it can also be used for cable wiring to prevent the loosening of cable board terminals and protect circuit board terminals and solder joints.
3. Types and specifications
TPU hot melt adhesive film has some special types according to different occasions of use. Such as:
High elastic TPU hot melt adhesive film: suitable for occasions with higher elasticity requirements.
High temperature washable TPU hot melt adhesive film: especially suitable for the clothing field, and can withstand the test of high temperature washing.
Anti-yellowing TPU hot melt adhesive film: when used for bonding transparent materials, it can maintain good aging resistance.
In addition, TPU hot melt adhesive film generally has two forms with paper and without paper, which can be selected according to specific needs.
4. Precautions for use
Greater brittleness: TPU hot melt adhesive film is relatively brittle and easily broken by external forces. Therefore, special attention should be paid to protection during use to avoid excessive stretching or twisting.
Poor aging resistance: After long-term exposure to air, the adhesion of TPU hot melt adhesive film will gradually weaken. In order to maintain its performance, it is recommended to store it in a dry and cool place to avoid direct sunlight.
Operation skills: The operation of TPU hot melt adhesive film requires certain skills and experience, and training is required to master the correct use method. At the same time, it is also necessary to pay attention to controlling the temperature and time to avoid affecting the bonding effect.
Surface treatment: Before using TPU hot melt adhesive film to laminate items, it is necessary to clean the dust, grease and other substances on the surface. Only when the surface treatment is in place, the bonding effect of the entire adhesive film can be more fully exerted in the subsequent use process.
Operation time: When using TPU hot melt adhesive film for lamination, its hot melting speed is very fast, and in most cases, strong viscosity can appear in about 15 seconds. Therefore, it is necessary to master the operation skills so that the bonding operation can be completed within the effective time after the film is hot melted.
Temperature control: When using TPU hot melt adhesive film for bonding, the pressing temperature and time need to be strictly controlled. Pressing temperature that is too high or time that is too long may cause damage to the fabric or excessive melting of the film; while pressing temperature that is too low or time that is too short may result in poor bonding effect. Therefore, in actual operation, it is necessary to adjust and optimize according to the specific situation.
Material suitability: Although TPU hot melt adhesive film has good adhesion to a variety of materials, its adhesion may be weaker for some special materials, such as polyethylene, polypropylene and other plastic materials. Therefore, when choosing to use TPU hot melt adhesive film, you need to make sure it is suitable for the material to be bonded.