The resulting PETG thin film can be applied to a packaging film, a preservative film, a shed film, a label film and a tangle film. Different blowing processes can be employed to obtain a non-shrinkage polyester film, and a unidirectional heat-shrinkable PETG film having approximate shrinkage rates lengthways and breadthways and giving priority to the lateral shrinkage rate. Compared with casting and stretching, the invention has the advantages of short flow, convenient processing, no generation of scrap edge, high film-forming rate which can be increased by 8-10% than a stretching method, equipment investment saving, low operating cost, low production cost which can be reduced by about 20% or more and strong adaptability, adoption of various blowing measures for making the blown film, flexible and convenient product replacement and the like. % of toughening agent blow molding, making film and shaping. The PETG thin film is prepared by mixing 85-92 wt. The invention relates to improvement of a PETG (polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester) thin film and a preparation method. B29C2948/92876- Feeding, melting, plasticising or pumping zones, e.g.B29C2948/92819- Location or phase of control.B29C2948/92- Measuring, controlling or regulating.B29C2948/00- Indexing scheme relating to extrusion moulding.B29C48/92- Measuring, controlling or regulating.B29C48/25- Component parts, details or accessories Auxiliary operations.B29C48/10- Articles with cross-sections having partially or fully enclosed cavities, e.g.B29C48/09- Articles with cross-sections having partially or fully enclosed cavities, e.g.expressing the moulding material through a die or nozzle which imparts the desired form Apparatus therefor characterised by the shape of the extruded material at extrusion expressing the moulding material through a die or nozzle which imparts the desired form Apparatus therefor B29C- SHAPING OR JOINING OF PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g.B29- WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by YIXING GUANGHUI PACKAGE CO Ltd filed Critical YIXING GUANGHUI PACKAGE CO Ltd Priority to CN2010101660373A priority Critical patent/CN101838445B/en Publication of CN101838445A publication Critical patent/CN101838445A/en Application granted granted Critical Publication of CN101838445B publication Critical patent/CN101838445B/en Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links Original Assignee YIXING GUANGHUI PACKAGE CO Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor 杨涛 陈亚龙 Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number CN2010101660373A Other languages Chinese ( zh) Google Patents CN101838445B - PETG blow molding film and preparation method thereof CN101838445B - PETG blow molding film and preparation method thereof
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