PVC soft gel products are highly favored in numerous fields such as toys, household items, and fashion accessories, thanks to their flexibility, elasticity, and wide-ranging applicability. Their production relies on the synergy of various raw materials. Below, we will introduce the essential raw materials and manufacturing steps for PVC soft gel products in a point-by-point manner.
I. Essential Raw Materials for PVC Soft Gel Products
Polyvinyl Chloride (PVC) Resin: As the core raw material for PVC soft gel products, it is polymerized from vinyl chloride monomers and exhibits excellent plasticity. PVC resins with different degrees of polymerization are suitable for different types of soft gel products. Resins with a high degree of polymerization are used to manufacture industrial parts that require high strength, while those with a low degree of polymerization are ideal for making soft toys and accessories.Plasticizers: They can significantly enhance the flexibility and plasticity of PVC resin, reducing its hardness and melting temperature, thus making it easier to process and shape. Common plasticizers include phthalates (such as DOP and DINP). However, due to environmental and health concerns, environmentally friendly plasticizers like citrate esters (such as ATBC) are gradually increasing in usage in the production of PVC soft gel products.Stabilizers: These are used to inhibit the degradation of PVC resin during the processing stage, which can be caused by factors such as heat, light, and oxygen. Lead - based stabilizers were once widely used, but nowadays, non-toxic and environmentally friendly calcium-zinc stabilizers have become the mainstream choice, especially for PVC soft gel products used in food packaging and children's toys.Lubricants: They are divided into internal and external lubricants. Internal lubricants reduce the friction between PVC resin molecules, while external lubricants prevent the material from adhering to the equipment. Common lubricants such as stearic acid and stearates can effectively improve the smoothness of the processing and the surface quality of the products.
Other Additives: Impact modifiers enhance the impact resistance of products; colorants endow products with a variety of colors; fillers such as calcium carbonate can reduce production costs and, to a certain extent, improve product properties such as hardness and dimensional stability.
II. Manufacturing Steps of PVC Soft Gel Products
Raw Material Preparation and Mixing: Weigh all kinds of raw materials accurately according to the product formula, put them into a high-speed mixer, and stir them at a specific temperature and speed to evenly disperse the additives in the PVC resin, forming a premix.Plasticization: Feed the premix into a twin-screw extruder. Under the high temperature (usually 160 - 190°C) and the shearing force of the screws, the material is plasticized into a molten state with good fluidity. During this process, it is necessary to strictly control the temperature and screw speed.Molding: Select appropriate molding processes and equipment according to the shape and requirements of the products. For PVC soft gel labels, pvc label machines are usually used. These machines can quickly mold the molten PVC material into labels that meet the specifications through precise printing and cutting operations, meeting the diverse needs of product identification. When making PVC soft gel patches, pvc patch machines play a crucial role. They can precisely press the plasticized PVC material into three-dimensional patches according to the design patterns, which are widely used for decorating clothing, backpacks, etc. For the production of PVC badges, pvc badge machines are indispensable. These devices use the mold injection molding method to shape the PVC material into the form of a badge, and different colors and patterns can be added to create exquisite badge products. During the molding process, parameters such as pressure, speed, and temperature of the corresponding equipment need to be adjusted to ensure product quality.Post-processing: Conduct annealing treatment on the molded products to eliminate internal stress, and improve the surface quality and enhance the aesthetics of the products through operations such as grinding, polishing, and spraying.
The production of PVC soft gel products is a process that closely combines various raw materials with strict manufacturing steps. With technological innovation and the increasing requirements for environmental protection, there will be more innovations and breakthroughs in the raw materials and manufacturing processes of PVC soft gel products in the future.