BAIJIAN - Third party testing organization
Thermoplasticity refers to the property of a substance that can undergo flow deformation during heating and maintain a certain shape after cooling. Most linear polymers exhibit thermoplastic properties and are easily subjected to molding processes such as extrusion、 injection、 or blow molding. Within a certain temperature range、 linear or branched polymers have the ability to repeatedly heat、 soften、 and cool to harden. In daily life、 things such as plastic bags and plastic clothes hangers all have thermoplastic properties. Therefore、 they can be sealed and bonded by heating and melting. The relative concept of thermoplasticity is thermosetting、 which refers to the property that cannot be softened and repeatedly molded during heating、 nor does it dissolve in solvents. Bulk polymers possess this property. Plastics with thermosetting properties are called thermosetting plastics. Thermosetting plastic refers to the ability to soften and flow during the first heating、 and when heated to a certain temperature、 it undergoes a chemical reaction that causes cross-linking and solidification、 resulting in hardening. This change is irreversible、 and after that、 when reheated、 it can no longer become soft and flow. It is precisely through this characteristic that molding and processing are carried out、 utilizing the plasticizing flow during the first heating to fill the mold cavity under pressure、 and then solidify into products of predetermined shape and size. The resin of thermosetting plastics is linear or branched before curing、 and after curing、 chemical bonds are formed between the molecular chains、 forming a three-dimensional network structure that cannot be melted or dissolved in solvents. Plastic mainly used for insulation、 wear resistance、 insulation、 high voltage resistance、 and other harsh environments、 most of which are thermosetting plastics. The most commonly used should be the handles of frying pans and high and low voltage electrical appliances. Commonly used thermosetting plastics include phenolic resin、 urea formaldehyde resin、 melamine resin、 unsaturated polyester resin、 epoxy resin、 organic silicon resin、 polyurethane、 etc
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