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US 2026/0159641 A1Published application
Recyclable copolyesters articles with living hinges
AssigneeEastman Chemical Company
InventorsMarc Alan Strand, Matthew Clement Storey, Mark Allen Peters
Life of this patent
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Abstract
A fully recyclable three component packaging article comprising (1) a reclosable lid with a living hinge which comprises a copolyester composition that is recyclable in a PET stream, (2) a container which comprises a copolyester composition that is recyclable in a PET stream; and affixed thereto is (3) a crystallizable shrinkable film or label which comprises a copolyester composition that is recyclable in a PET stream.
Claims20
A three-component recyclable article comprising
- A) component A—an injection molded reclosable lid with a living hinge which comprises at least one polyester comprising:
- (a) a dicarboxylic acid component comprising:
- (i) 88 to 100 mole % of terephthalic acid residues;
- (ii) 0 to 12 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a glycol component comprising:
- (i) 88 to 100 mole % of ethylene glycol residues;
- and
- (ii) 0 to 12 mole % of 1,4-cyclohexanedimethanol residues;
- wherein the total mole % of the acid residues is 100 mole %, and the total mole % of the glycol residues is 100 mole %;
- wherein the inherent viscosity (IhV) of said polyester ranges from 0.60 to 1.1 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.25 g/50 ml at 250;
- and
- wherein the melting point temperature (Tm) of said polyester ranges from 225 to 255 C as determined by ASTM D3418 at a scan rate of 100/min;
- B) component B—an injection stretch blow molded container which comprises at least one polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) 88 to 100 mole % of terephthalic acid residues;
- (ii) 0 to 12 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a glycol component comprising:
- (i) 88 to 100 mole % of ethylene glycol residues;
- and
- (ii) 0 to 12 mole % of 1,4-cyclohexanedimethanol residues;
- and
- (c) optionally, at least one branching agent in the amount ranging from 0.05 to 1.0 mole % based on the total moles of glycol residues if said branching agent has hydroxyl substituents and otherwise based on the total moles of acid residues;
- wherein the total mole % of the acid residues is 100 mole %, and the total mole % of the glycol residues is 100 mole %;
- wherein the inherent viscosity (IhV) of said polyester ranges from 0.60 to 1.1 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.25 g/50 ml at 25° C.;
- and
- wherein the melting point temperature (Tm) of said polyester ranges from 225 to 255° C. as determined by ASTM D3418 at a scan rate of 10° C./min;
- and
- C) component C—a heat-shrinkable label or film which comprises a crystallizable film comprising a polyester composition comprising:
- at least one polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) about 70 to about 100 mole % of terephthalic acid residues;
- (ii) about 0 to about 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a diol component comprising:
- about 75 mole % or greater of ethylene glycol residues and
- about 25 mole % or less of other glycols comprising one or more of:
- (i) about 0.1 to less than about 24 mole % of neopentyl glycol residues;
- (ii) 0 to less than about 24 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 1 to less than about 10 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the diol component is 100 mole %;
- or
- C′) component C′-a heat-shrinkable label or film which comprises a crystallizable film comprising a blend of polyester compositions comprising:
- (1) 5-80% of at least one crystallizable polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) about 70 to about 100 mole % of terephthalic acid residues;
- (ii) about 0 to about 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- a diol component chosen from either (b) or (b′), wherein
- (b) is a diol component comprising:
- about 75 mole % or greater of ethylene glycol residues and
- about 25 mole % or less of other glycols comprising one or more of:
- (i) about 0 to less than about 25 mole % of neopentyl glycol residues;
- (ii) about 0 to less than about 25 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 0 to less than about 10 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and
- wherein the total mole % of the diol component is 100 mole %;
- and wherein
- (b′) is a diol component comprising:
- about 75 mole % or greater of ethylene glycol residues and
- about 25 mole % or less of other glycols comprising one or more of:
- (i) about 0.1 to less than about 24 mole % of neopentyl glycol residues;
- (ii) about 0.1 to less than about 24 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 1 to less than about 10 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the diol component is 100 mole %;
- and
- (2) 20-95% of at least one amorphous polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) about 70 to about 100 mole % of terephthalic acid residues;
- (ii) about 0 to about 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a diol component comprising:
- about 60 mole % or greater of ethylene glycol residues and
- about 40 mole % or less of other glycols comprising one or more of:
- (i) about 0 to less than about 40 mole % of neopentyl glycol residues;
- (ii) about 0 to less than about 40 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 0 to less than about 15 mole % of total diethylene glycol residues in the final polyester composition, whether or not formed in situ;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the diol component is 100 mole %;
- and wherein (1) and (2) are different;
- and
- wherein the inherent viscosity (IhV) ranges from 0.60 to 0.8 dL/g for said polyester compositions for component A and component B;
- and
- wherein the component A polyester has 0.1 to 10 mole % of 1,4-cyclohexanedimethanol residues.
81 more elements
A three-component recyclable article comprising
- A) component A—an injection molded reclosable lid with a living hinge which comprises at least one polyester comprising:
- (a) a dicarboxylic acid component comprising:
- i) 88 to 100 mole % of terephthalic acid residues;
- ii) 0 to 12 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a glycol component comprising:
- i) 0 to 12 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues;
- ii) 0 to 12 mole % of 1,4-cyclohexanedimethanol residues,
- iii) 0 to 12 mole % of neopentyl glycol residues;
- iv) 0 to 12 mole % of DEG;
- v) 0 to 12 mole % of MPDiol;
- iv) 0 to 12 mole % of other modifying glycols residues;
- v) up to 100 mole % of ethylene glycol residues;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and the total mole % of the glycol component is 100 mole %;
- and
- wherein the copolyester has 0-12 wt % total comonomer content from glycols and acids other than ethylene glycol (EG), terephthalic acid (TPA), or dimethyl terephthalate (DMT) or any combinations thereof must be less than 12 wt %;
- wherein the inherent viscosity of the copolyester is 0.60 to 1.1 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;
- wherein the copolyester has a Tg of 70 to 115° C.;
- wherein the lid has a melting temperature (Tm) of 225-255° C.;
- wherein the lid has an average thickness of from 0.5-2 mm;
- and
- B) component B—an injection stretch blow molded container which comprises at least one copolyester which comprises:
- (a) a dicarboxylic acid component comprising:
- i) 88 to 100 mole % of terephthalic acid residues;
- ii) 0 to 12 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a glycol component comprising:
- i) 0 to 12 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues;
- ii) 0 to 12 mole % of 1,4-cyclohexanedimethanol residues,
- iii) 0 to 12 mole % of neopentyl glycol residues;
- iv) 0 to 12 mole % of other modifying glycols residues;
- v) up to 100 mole % of ethylene glycol residues;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and the total mole % of the glycol component is 100 mole %;
- and
- wherein the copolyester has 0-12 wt % total comonomer content from glycols and acids other than ethylene glycol (EG), terephthalic acid (TPA), or dimethyl terephthalate (DMT) or any combinations thereof must be less than 12 wt %;
- wherein the inherent viscosity of the copolyester is 0.65 to 0.8 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;
- wherein the copolyester has a Tg of 70 to 115° C.;
- wherein the container has a melting temperature (Tm) of 225-255° C.;
- wherein the container has an average thickness of from 0.5-2 mm;
- and
- C) component C—a heat-shrinkable label or film which comprises a crystallizable film comprising a polyester composition comprising:
- at least one polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) about 70 to about 100 mole % of terephthalic acid residues;
- (ii) about 0 to about 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a diol component comprising:
- about 75 mole % or greater of ethylene glycol residues and
- about 25 mole % or less of other glycols comprising:
- (i) about 0.1 to less than about 24 mole % of neopentyl glycol residues;
- (ii) 0 to less than about 24 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 1 to less than about 10 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the diol component is 100 mole %;
- or
- C′) component C′—a heat-shrinkable label or film which comprises a crystallizable film comprising a blend of polyester compositions comprising:
- (1) 5-80% of at least one crystallizable polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) about 70 to about 100 mole % of terephthalic acid residues;
- (ii) about 0 to about 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- a diol component chosen from either (b) or (b′), wherein
- (b) is a diol component comprising:
- about 75 mole % or greater of ethylene glycol residues and
- about 25 mole % or less of other glycols comprising:
- (i) about 0 to less than about 25 mole % of neopentyl glycol residues;
- (ii) about 0 to less than about 25 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 0 to less than about 10 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the diol component is 100 mole %;
- or wherein
- (b′) is a diol component comprising:
- about 75 mole % or greater of ethylene glycol residues and
- about 25 mole % or less of other glycols comprising:
- (i) about 0.1 to less than about 24 mole % of neopentyl glycol residues;
- (ii) about 0.1 to less than about 24 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 1 to less than about 10 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and
- wherein the total mole % of the diol component is 100 mole %;
- and (2) 20-95% of at least one amorphous polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) about 70 to about 100 mole % of terephthalic acid residues;
- (ii) about 0 to about 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a diol component comprising:
- about 60 mole % or greater of ethylene glycol residues and
- about 40 mole % or less of other glycols comprising one or more of:
- (i) about 0 to less than about 40 mole % of neopentyl glycol residues;
- (ii) about 0 to less than about 40 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) about 0 to less than about 15 mole % of total diethylene glycol residues in the final polyester composition, whether or not formed in situ;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the diol component is 100 mole %;
- and wherein (1) and (2) are different;
- and
- wherein the inherent viscosity (IhV) ranges from 0.60 to 0.8 dL/g for said polyester compositions for component A and component B;
- and
- wherein the component A polyester has 0.1 to 10 mole % of 1,4-cyclohexanedimethanol residues.
91 more elements
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Dependencies are inferred from the claim text.