Pearl cotton, also known as polyethylene foam, is a new type of environmentally friendly packaging material. Its production process is unique and involves multiple steps, from the preparation of raw materials to the final product molding, which requires delicate operation and control. Below, we will introduce the production process of pearl cotton in detail.
1. Preparation of raw materials.
The main raw material of EPE is low-density polyethylene (LDPE) resin, which is a thermoplastic resin with good processability and stability. Before production, LDPE resins need to be quality inspected to ensure that they meet production requirements. At the same time, it is also necessary to prepare other auxiliary materials, such as foaming agents, catalysts, etc.
2. Ingredients and premixing.
LDPE resin, blowing agent, catalyst, etc. are batched according to a certain ratio. In the process of batching, the proportion of each component should be strictly controlled to ensure product quality. Premixing is the initial mixing of the batched materials to make them evenly distributed in preparation for subsequent melt extrusion.
3. Melt extrusion.
The premixed material is fed into the extruder and extruded into flakes by melting at high temperatures. In the process of melt extrusion, parameters such as temperature, pressure and speed should be controlled to ensure the quality of the extruded sheet. The extruded sheet should have a uniform foaming structure and good mechanical properties.
4. Cooling and cutting.
The extruded sheet needs to be cooled to allow it to solidify gradually. During the cooling process, the flatness and stability of the sheet should be maintained. After cooling, the sheet is cut to the required size for subsequent processing and use.
5. Maturation and post-processing.
After cutting, the pearl cotton needs to be cured to improve its physical properties and stability. During the maturation process, the appropriate temperature and humidity should be maintained to make the pearl cotton fully foamed. After maturation, the pearl cotton needs to be post-treated, such as edge removal, trimming, etc., so that it can meet the final product requirements.
6. Quality inspection and packaging.
The quality inspection of the produced pearl cotton is carried out, including appearance, size, density, compressive strength and other indicators. Ensure that the quality of the product meets the relevant standards and customer requirements. After passing the inspection, the pearl cotton is packaged, generally in plastic bags or cartons, to prevent the product from being damaged during transportation.
7. Warehousing and storage.
When the packaged pearl cotton is stored in the warehouse, it is necessary to pay attention to measures such as moisture-proof, sunscreen, and pressure-proof to maintain the quality and performance of the product. At the same time, it is necessary to do a good job in inventory management to ensure that products are delivered to customers in a timely manner.
Through the above seven links of the production process, we can produce pearl cotton products with stable quality and excellent performance. As an environmentally friendly packaging material, pearl cotton has been widely used in electronics, electrical appliances, furniture, toys and other industries. With the continuous progress of science and technology and the continuous change of market demand, the production process of pearl cotton will continue to develop and improve to meet the needs of more fields.