Do you know what the core components of PVC leather are? The content of its components depends on the specific use and performance requirements.
The typical content ratio range of its core components is as follows:
‌1. Polyvinyl chloride resin (PVC resin)‌
‌Content ratio‌: 60%-85% in the basic formula, as the main film-forming substance, determines the mechanical strength and chemical resistance of the material‌.
‌Function‌: Provide a rigid skeleton, and optimize the balance between flexibility and hardness by adjusting the molecular weight of the resin‌.
2. Plasticizer‌
Content ratio‌: Soft PVC leather: 30%-50%‌ (such as DOP, DBP and other phthalates)‌.
Hard PVC leather: ≤5%‌ or no addition‌.
‌Function‌: Reduce the force between PVC molecular chains and improve flexibility; excessive addition will reduce aging resistance‌.
‌3. Stabilizer‌
‌Content ratio‌: 1%-3%, commonly used lead salts, organic tin or rare earth stabilizers‌.
‌Function‌: Inhibit thermal/photodegradation during PVC processing and use, and extend the life of the material‌.
‌4. Fillers and auxiliary agents‌
‌Calcium carbonate/heavy calcium‌: Accounting for ‌5%-40%‌, used to reduce costs, increase hardness and wear resistance (such as up to 40% in floor leather formula)‌.
‌Flame retardant‌: Such as chlorinated paraffin, accounting for ‌5%-10%‌, improve flame retardant properties.
‌Foaming agent‌: AC foaming agent accounts for about ‌5%‌, used to make foaming layers (such as household floor leather).
‌Colorant‌: Added in small amounts (0.1%-2%), used to adjust the appearance color.