BAIJIAN - Third party testing organization
Polyvinyl chloride、 also known as PVC、 is a polymer formed by the polymerization of vinyl chloride monomer (VCM) with initiators such as peroxides and azo compounds、 or under the action of light and heat、 according to the mechanism of free radical polymerization. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively referred to as vinyl chloride resin. PVC is a white powder with an amorphous structure and low branching degree. It begins to decompose at a glass transition temperature of 77~90 ℃、 around 170 ℃、 and has poor stability to light and heat. When it is above 100 ℃ or exposed to long-term sunlight、 it will decompose to produce hydrogen chloride、 which further catalyzes decomposition and causes discoloration. Its physical and mechanical properties also rapidly decrease. In practical applications、 stabilizers must be added to improve stability to heat and light. The molecular weight of PVC produced in industrial production generally ranges from 50000 to 110000、 with significant polydispersity. The molecular weight increases with the decrease of polymerization temperature、 without a fixed melting point. It begins to soften at 80-85 ℃、 becomes viscoelastic at 130 ℃、 and becomes viscous at 160-180 ℃; Has good mechanical properties、 with a tensile strength of about 60MPa and an impact strength of 5-10kJ/m2; Has excellent dielectric properties. PVC was once the world's largest general-purpose plastic in production and widely used. It is widely used in building materials、 industrial products、 daily necessities、 floor leather、 floor tiles、 artificial leather、 pipes、 wires and cables、 packaging films、 bottles、 foaming materials、 sealing materials、 fibers、 and other fields
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