Three questions about PVC foam board

The manufacturing process of PVC foam board generally includes the following steps: 1. Preparation of raw materials: select suitable PVC materials, as well as stabilizers, foaming agents and other auxiliary materials, and mix and melt. 2. Extrusion production: The mixed material is extruded through the extruder to make long strips of plates. 3. Processing: Processing the extruded plates, including cutting, slotting, embossing, molding, etc. 4. Surface treatment: according to customer requirements, surface treatment, including hot pressing, flat or bending processing, spraying, etc. 5. Testing and packaging: Strict testing of products, including testing the thickness, hardness, strength, density, etc. of products. Finally, it is packed and shipped.

The mass and density of PVC foam board are calculated by the following method: 1. Mass calculation: According to the volume and density of PVC foam board, its mass can be calculated. The formula is: mass = volume × density. 2. Density calculation: The density of PVC foam board can be calculated by weighing a known volume of PVC foam board and calculating its mass. The formula is: density = mass/volume. 3. Other calculation methods include compression, tensile and other tests on PVC foam boards, and obtain performance indicators such as hardness and tensile strength of the product through the test, so as to evaluate the quality and density of the product.

The sampling process of PVC foam board is mainly divided into the following steps: 1. Preparation: Before sampling, you need to prepare corresponding testing equipment, standards and specifications, sampling plans, etc. 2. Sampling: According to the sampling plan, randomly select a certain number of samples from the production process and inventory, and determine the sampling area, method and method. 3. Testing: Use the corresponding testing equipment to test the sample, including appearance, size, hardness, density, heat resistance, weather resistance, chemical composition and other aspects. 4. Judgment: Through the analysis and judgment of the test results, the quality and qualification of the sample are judged. 5. Treatment: Dispose of unqualified products, such as remanufacturing, rework, etc. 6. Record: record the inspection results, defects, and treatment information of each sample, as well as the plan, execution process and results of the sampling inspection. Through the sampling process, we can ensure that the quality and performance of the products meet the standard requirements, and find and deal with unqualified products in a timely manner, so as to improve the product quality and customer satisfaction of the enterprise.