PVC waterproof fabricThe manufacturing process mainly includes the following steps:
1、 Raw material preparation
Base fabric selection: Textile fabrics such as Oxford cloth are usually used as substrates, which need to have a certain strength and stability to support subsequent coating treatments.
Preparation of PVC material: PVC (polyvinyl chloride) is an ethylene based polymer and a non crystalline material. During the manufacturing process, PVC plastic particles need to be melted and stirred into a paste for coating.
2、 Fabric pretreatment
In order to improve the adhesion between PVC coating and base fabric, it is necessary to pretreat the base fabric. The pre-treatment steps may include decontamination, degreasing, alkaline washing, bleaching, etc., to remove impurities and oil stains on the surface of the base fabric, improve the hydrophilicity of the base fabric and the adhesion of the coating.
3、 PVC coating coating
Coating process: Mix and melt the PVC material into a paste and evenly coat it onto the pre treated base fabric. This step can be achieved through methods such as coating machines, scrapers, or rollers to ensure that the coating thickness and uniformity meet the waterproof performance requirements.
Foaming treatment: In some manufacturing processes, the coated base fabric will enter a foaming furnace for foaming treatment, giving it better flexibility and the ability to adapt to different product requirements. Foaming treatment can also enhance the waterproof performance and durability of PVC waterproof fabric.
4、 Drying and curing
Drying process: The coated base fabric is sent to an oven or tunnel furnace for drying to remove solvents or moisture and cure the PVC coating. The drying temperature and time need to be adjusted according to the characteristics of PVC material to ensure that the coating is completely cured and will not crack or discolor.
Heat setting: The dried waterproof fabric also needs to undergo heat setting treatment to stabilize the coating structure and further improve its waterproof and weather resistance. The heat setting temperature and time also need to be adjusted according to the characteristics of the coating material and the base fabric.
5、 Post sorting and testing
Post finishing: Post finishing of waterproof fabrics, including dyeing, embossing, anti mold treatment, etc., to meet different appearance and functional requirements. These post-processing techniques can be customized according to customer needs.
Quality inspection: Finally, the waterproof fabric is tested for its waterproof performance, weather resistance, wear resistance, and other indicators to ensure that it meets quality standards. Quality inspection is an important step in ensuring the stable and reliable quality of PVC waterproof fabric.
In summary, the manufacturing process of PVC waterproof fabric is a complex and delicate process that requires strict control of process parameters and conditions at each step to ensure the performance and quality of the final product.
