The patent application date is 1998+0.26.
A series of solid-state tackifying polymerization methods for making PET chips of plastic strips.
Release (announcement)No. CN 1 19245 1
Announcement date 1998.09.09
Category chemistry; metallurgy
Certification date
Priority 1997.2.3 US 794538
Apply for (patent) Illinois Tool Manufacturing Company
Address: Illinois, USA
Inventor (designer) D. von Eden; G. L. Wadenas enriquez; K.g. Edmos; Niels
International application
International announcement
date of entry
Patent Agency China Council for the Promotion of International Trade Patent and Trademark Office
Agent Liu Jinhui
abstract
The invention discloses a method for preparing a strip by using post-consumption and non-post-consumption PET with wide intrinsic viscosity, and a heterogeneous IV-increased PET product suitable for high-performance strip extrusion is obtained in sheet form through direct solid-state tackifying polymerization. The method of the present invention improves the IV of post-consumption resin mainly composed of polyethylene terephthalate (PET) by the following ways; Cut the consumed plastic into small pieces and thick pieces, roll the small pieces and thick pieces, preheat the small pieces, and further heat the small pieces and thick pieces in hot nitrogen atmosphere, thus improving the intrinsic viscosity. The viscosity-increased PET polymer of the present invention provides a polymer suitable for producing high-performance tapes.
Sovereignty terms
A method for preparing a PET material suitable for producing high-performance plastic strips includes the following steps: collecting a PET material with a wide IV (intrinsic viscosity) distribution mainly in the range of 0.60 dl/g to 0.80 dl/g but as high as 0.95 dl/g; Mixing the collected materials and converting them into heterogeneous IV material mixture consisting of various heterogeneous similar blocks and fragments similar to thick blocks; And directly subjecting the heterogeneous mixture to solid-phase tackifying polymerization (SSP) to form a heterogeneous material with an average IV of at least 0.90 dl/g. ..