다층용기, 그의 제조방법, 및 재생폴리에스테르의 제조방법

• Main Authors: OTSUKA KOSUKE, DAITO MASAYUKI, YAMADA TAKUMI
• Format: Patent
• Language: Korean
• Published: 17.10.2022
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; GENERAL PROCESSES OF COMPOUNDING; HANDLING THIN OR FILAMENTARY MATERIAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

폴리에스테르 수지(X)를 포함하는 폴리에스테르층과, 폴리아미드 수지(Y) 및 황변억제제(A)를 포함하는 폴리아미드층을 갖고, 폴리아미드 수지(Y)의 함유량이, 전체폴리아미드층 및 전체폴리에스테르층의 합계량에 대하여, 0.05~7.0질량%이며, 황변억제제(A)의 함유량이, 전체폴리아미드층 및 전체폴리에스테르층의 합계량에 대하여, 1~30ppm인, 다층용기, 그의 제조방법, 및 상기 다층용기로부터 폴리에스테르를 회수하는 공정을 갖는, 재생폴리에스테르의 제조방법이다. Provided is a multilayer container including: a polyester layer containing a polyester resin (X); and a polyamide layer containing a polyamide resin (Y) and a yellowing inhibitor (A). The content of the polyamide resin (Y) is from 0.05 to 7.0 mass% relative to a total amount of all polyamide layers and all polyester layers, and the content of the yellowing inhibitor (A) is from 1 to 30 ppm relative to the total amount of all polyamide layers and all polyester layers. Also provided are a method for manufacturing the multilayer container, and a method for manufacturing a recycled polyester, the method thereof including a step of recovering polyester from the multilayer container.