Multi-layer container, method for producing same, and method for producing reclaimed polyester
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKosuke Otsuka, Masayuki Daito, Takumi Yamada
Life of this patent
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Abstract
Provided is a multilayer container having 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 the total amount of all polyamide layers and all polyester layers. The yellowing inhibitor (A) is a dye. The content of the yellowing inhibitor (A) is from 400 to 800 ppm relative to the polyamide layer. An L* of the multilayer container is 87.5 or greater.
Claims17
A multilayer container comprising:
- a polyester layer containing a polyester resin (X);
- and
- a polyamide layer containing a polyamide resin (Y) and a yellowing inhibitor (A),
- wherein
- a 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,
- the yellowing inhibitor (A) is a dye,
- the content of the yellowing inhibitor (A) is from 400 to 800 ppm relative to the polyamide layer, and
- an L* value of the multilayer container is 87.5 or greater.
A method for manufacturing a multilayer container,
- the multilayer container having
- a polyester layer containing a polyester resin (X), and
- a polyamide layer containing a polyamide resin (Y) and a yellowing inhibitor (A),
- a content of the polyamide resin (Y) being from 0.05 to 7.0 mass % relative to a total amount of all polyamide layers and all polyester layers,
- the yellowing inhibitor (A) being a dye,
- a content of the yellowing inhibitor (A) being from 400 to 800 ppm relative to the polyamide layer, and
- an L* value of the multilayer container being 87.5 or greater,
- the method comprising:
- Step 1:
- mixing the polyamide resin (Y) and the yellowing inhibitor (A) to prepare a polyamide resin mixture;
- Step 2:
- co-injection molding the polyamide resin mixture and a polyester resin composition containing the polyester resin (X), and thereby obtaining a multilayer preform;
- and
- Step 3:
- blow molding the multilayer preform.
Dependencies are inferred from the claim text.