At present、 the application field of plastic materials is still further expanding、 involving various aspects of the national economy and people's lives. To engage in plastic molding and processing、 one must be familiar with the structure、 performance、 and application of plastic materials、 and understand the development status of plastic materials. This textbook is written based on this starting point. Through the study of this textbook、 students can become familiar with the structure and performance of plastic materials、 and achieve the following goals: ① Familiarize themselves with the structure、 performance、 and application range of commonly used plastic materials. ② Able to identify commonly used plastic materials based on their appearance and combustion characteristics Familiar with the working principle、 commonly used varieties、 and application range of commonly used plastic additives、 and able to conduct basic performance tests. ④ Able to select appropriate material varieties and models based on processing methods and product performance requirements、 and be able to design commonly used formulas. In addition to the above points、 attention should also be paid to integrating theory with practice、 paying more attention to observing daily necessities、 distinguishing the characteristics of plastic materials used in various products、 and comparing and analyzing the similarities and differences between materials to better grasp the characteristics of materials、 laying a solid foundation for engaging in plastic processing. Due to the rapid development of modification technology for plastic materials、 it is also necessary to understand new materials and processes to make their own contributions to the development of the plastic industry P>
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China