Biaxially oriented polyethylene terephthalate resin bottle-shaped container

Claim 2

A biaxially-oriented polyethylene terephthalate resin bottle-shaped container, said container exhibiting no substantial deformation when exposed to a temperature of 120° C. for 30 minutes and being made according to a method comprising the sequential steps of: (a) thermally crystallizing a neck portion of a preform; (b) heating said preform; (c) biaxial-orientation blow-molding said preform at a predetermined temperature to form a primary intermediate molded bottle-shaped piece; then (d) applying heat to said primary intermediate molded bottle-shaped piece for heat treating said primary intermediate molded bottle-shaped piece by heating said primary intermediate molded bottle-shaped piece to a temperature greater than said predetermined temperature during biaxial-orientation blow molding of said preform to thermally contract said primary intermediate molded bottle-shaped piece to form a secondary intermediate molded bottle-shaped piece; and (e) biaxial-orientation blow-molding said secondary intermediate molded bottle-shaped piece to form said bottle-shaped container exhibiting no substantial deformation when exposed to said temperature of 120° C. due to said application of heat to said primary intermediate molded bottle-shaped piece at said greater temperature.

Claim 3

The container of claim 1 wherein said preform is heated to a temperature which approaches but does not reach a thermal crystallization temperature of polyethylene terephthalate.

Claim 4

The container of claim 1 wherein said primary intermediate molded bottle-shaped piece is heat treated in a range that does not exceed a temperature immediately before a melting temperature point of 255° C. of polyethylene terephthalate.

Claim 5

The container of claim 1, wherein said step of thermally crystallizing is conducted without orienting deformation.

Claim 6

The container according to claim 4, wherein said neck portion remains in substantially the same shape during said step of thermally crystallizing.

Claim 7

The container according to claim 1, wherein said biaxial-orientation blow-molding of said preform is performed in a first blow-mold at a first blow-mold temperature, and wherein during said heat treating, said primary intermediate molded bottle-shaped piece is heated to a temperature at least 20° C. higher than said first blow-mold temperature.

Claim 8

The container according to claim 1, wherein said preform is blow-molded in a first blow-mold, and said secondary intermediate molded bottle-shaped piece is blow-molded in a second blow-mold, separate from said first blow-mold.

Claim 9

The container according to claim 1 wherein said primary intermediate method bottle-shaped piece is heat treated at 170° C. to 255° C.

Claim 10

The container of claim 1 wherein a size of said primary intermediate molded bottle-shaped piece is at least as great as a size of said bottle-shaped container.

Claim 11

The container of claim 1 wherein a maximum diameter of said primary intermediate molded bottle-shaped piece is at least as great as a maximum diameter of said bottle-shaped container.

Claim 12

The container of claim 1 wherein an orientation-molded portion of said secondary intermediate molded bottle-shaped piece is substantially the same size as or slightly smaller than an orientation-molded portion of said bottle-shaped container.

Claim 13

The container of claim 1 wherein orientation magnification from said secondary intermediate molded bottle-shaped piece to said bottle-shaped container is quite small, so that almost no residual stress is created in said bottle-shaped container.

Claim 14

The container of claim 1 wherein said preform is heated at 100° C. to 120° C.

Claim 15

The container according to claim 1, wherein said preform is orientation area magnified 5 to 13 times to form said primary intermediate molded bottle-shaped piece.

Claim 16

The container according to claim 1, wherein said preform is orientation area magnified 5 to 13 times to form said primary intermediate molded bottle-shaped piece so that a body portion of said container is not thermally crystallized even when subjected to said first blow-mold heated at 110° to 230° C.

Claim 17

The container according to claim 1, wherein a body portion of said container is clear and transparent.

Claim 18

The container according to claim 1, wherein a temperature of a secondary blow-mold is several degrees greater than a preselected maximum temperature to which said molded bottle-shaped container is subjected during use.

Claim 19

The container according to claim 1, wherein a temperature of a secondary blow-mold is several degrees greater than a preselected maximum temperature to which said molded bottle-shaped container is subjected during use such that said bottle-shaped container is heat set by said secondary blow-mold, and therefore said bottle-shaped container has no residual stress as well as high heat resistance.

Claim 20

A biaxially-oriented polyethylene terephthalate resin bottle-shaped container, said container exhibiting no substantial deformation when exposed to a temperature of 120° C. for 30 minutes, and being made according to a method comprising the sequential steps of: (a) thermally crystallizing a neck portion of a preform; (b) heating said preform; (c) biaxial-orientation blow-molding said preform in a first blow-mold heated at 110° C. to 230° C. to form a primary intermediate molded bottle-shaped piece; then (d) applying heat to said primary intermediate molded bottle-shaped piece for heat treating said primary intermediate molded bottle-shaped piece by heating said primary intermediate molded bottle-shaped piece to a temperature at least 20° C. higher than said temperature of said first heated blow-mold to thermally contract said primary intermediate molded bottle-shaped piece to form a secondary intermediate molded bottle-shaped piece; and (e) biaxial-orientation blow-molding said secondary intermediate molded bottle-shaped piece in a secondary blow-mold, distinct from said first blow-mold, heated at 100° C. to 150° C. to form said bottle-shaped container exhibiting no substantial deformation when exposed to said temperature of 120° C. due to said application of heat to said primary intermediate molded bottle-shaped piece at said higher temperature.

Claim 21

A biaxially-oriented polyethylene terephthalate resin bottle-shaped container, said container exhibiting no substantial deformation when exposed to a temperature of 120° C. for 30 minutes, and being made according to a method comprising the sequential steps of: (a) thermally crystallizing a neck portion of a preform; (b) heating said preform; (c) biaxial-orientation blow-molding said preform in a first blow-mold heated at 110° C. to 230° C. to form a primary intermediate molded bottle-shaped piece; then (d) applying heat to said primary intermediate molded bottle-shaped piece for heat treating said primary intermediate molded bottle-shaped piece by heating said primary intermediate molded bottle-shaped piece to a temperature at least 20° C. higher than said temperature of said first heated blow-mold to thermally contract said primary intermediate molded bottle-shaped piece to form a secondary intermediate molded bottle-shaped piece; and (e) biaxial-orientation blow-molding said secondary intermediate molded bottle-shaped piece in a secondary blow-mold, distinct from said first blow-mold, heated at 100° C. to 150° C. to form said bottle-shaped container exhibiting no substantial deformation when exposed to said temperature of 120° C. due to said application of heat to said primary intermediate molded bottle-shaped piece at said higher temperature.

Claim 22

The biaxially-oriented polyethylene terephthalate resin bottle-shaped container of claim 17, said container exhibiting no substantial deformation when contents of said container are heat treated in said container.

Claim 23

The container according to claim 19 wherein said primary intermediate molded bottle-shaped piece is heat treated at 130° to 255° C.

Claim 24

The container according to claim 19 wherein said primary intermediate molded bottle-shaped piece is heat treated at 200° to 235° C.

Claim 25

The container according to claim 19 wherein said primary intermediate molded bottle-shaped piece is heat treated at 170° to 255° C.

Claim 26

The container according to claim 19 wherein said second blow-mold is heated at 120° C. to 150° C.

Claim 27

The container of claim 19 wherein at least one of a height and a maximum diameter of said primary intermediate molded bottle-shaped piece is at least as great as a corresponding one of a height and a maximum diameter of said bottle-shaped container.

Claim 28

The container of claim 19 wherein a size of said primary intermediate molded bottle-shaped piece is at least as great as a size of said bottle-shaped container.

Claim 29

The container of claim 19 wherein a maximum diameter of said primary intermediate molded bottle-shaped piece is at least as great as a maximum diameter of said bottle-shaped container.

Claim 30

The container of claim 19 wherein an orientation-molded portion of said secondary intermediate molded bottle-shaped piece is substantially the same size as or slightly smaller than an orientation-molded portion of said bottle-shaped container.

Claim 31

The container of claim 19 wherein an orientation magnification from said secondary intermediate molded bottle-shaped piece to said bottle-shaped container is quite small, so that almost no residual stress is created in said bottle-shaped container.

Claim 32

The container of claim 19 wherein said preform has a predetermined shape prior to said step of heating said preform.

Claim 33

The container of claim 30 wherein said preform has said predetermined shape formed by injection molding.

Claim 34

The container of claim 19 wherein said preform is heated to 100° C. to 120° C.

Claim 35

The container of claim 19 wherein said second blow-mold is heated to a temperature higher than a sterilizing temperature of contents for said bottle-shaped container.

Claim 36

The container of claim 19, wherein said step of thermally crystallizing is conducted without orienting deformation.

Claim 37

The container according to claim 34, wherein said neck portion remains in substantially the same shape during said step of thermally crystallizing.

Claim 38

The container of claim 19 wherein said heat treating of said primary intermediate molded bottle-shaped piece to form said secondary intermediate molded bottle-shaped piece eliminates residual stress developed in said primary intermediate molded bottle-shaped piece from biaxial orientation blow-molding.

Claim 39

The container of claim 19 wherein said heat treating of said primary intermediate molded bottle-shaped piece deforms said primary intermediate molded bottle-shaped piece by climinating internal residual stress to form said secondary intermediate molded bottle-shaped piece.

Claim 40

The container according to claim 19, wherein said preform is orientation area magnified 5 to 13 times to form said primary intermediate molded bottle-shaped piece.

Claim 41

The container according to claim 19, wherein said preform is orientation area magnified 5 to 13 times to form said primary intermediate molded bottle-shaped piece so that a body portion of said container is not thermally crystallized even when subjected to said first blow-mold heated at 110° to 230° C.

Claim 42

The container according to claim 19, wherein said preform is orientation area magnified so that a density of said resin becomes 1.36 or greater.

Claim 43

The container according to claim 19, wherein a body portion of said container is clear and transparent.

Claim 44

The container according to claim 19, wherein said temperature of secondary blow-mold is several degrees greater than a preselected maximum temperature to which said molded bottle-shaped container is subjected during use.

Claim 45

The container according to claim 19, wherein said temperature of secondary blow-mold is several degrees greater than a preselected maximum temperature to which said molded bottle-shaped container is subjected during use such that said bottle-shaped container is heat set by said secondary blow-mold, and therefor said bottle-shaped container has no residual stress as well as high heat resistance.

Claim 46

The container of claim 19, wherein said preform is heated to 90° C. to 130° C.

Claim 47

A biaxially-oriented polyethylene terephthalate resin bottle-shaped container, said container exhibiting no substantial deformation when exposed to a temperature of at least 120° C. for 30 minutes, and being made according to a method comprising the sequential steps of: (a) thermally crystallizing a neck portion of a preform; (b) heating said preform; (c) biaxial-orientation blow-molding said preform in a first blow-mold heated at 110° to 230° C. to form a primary intermediate molded bottle-shaped piece, said preform being orientation area magnified 5 to 13 times to form said primary intermediate molded bottle-shaped piece; then (d) applying heat to said primary intermediate molded bottle-shaped piece for heat treating said primary intermediate molded bottle-shaped piece by heating said primary intermediate molded bottle-shaped piece to a temperature at least 20° C. higher than said temperature of said first heated blow-mold to thermally contract said primary intermediate molded bottle-shaped piece to form a secondary intermediate molded bottle-shaped piece; and (e) biaxial-orientation blow-molding said secondary intermediate molded bottle-shaped piece in a secondary blow-mold, distinct from said first blow-mold, heated at 100° C. to 150° C. to form said bottle-shaped container, said secondary intermediate molded bottle-shaped piece having a substantially small orientation magnification so that almost no residual stress is created in said bottle-shaped container.

Claim 48

A biaxially-oriented polyethylene terephthalate resin bottle-shaped container, said container exhibiting no substantial deformation when exposed to a temperature of at least 120° C. for 30 minutes, and being made according to a method comprising the sequential steps of: (a) thermally crystallizing a neck portion of a preform; (b) heating said preform; (c) biaxial-orientation blow-molding said preform in a first blow-mold heated at 110° to 230° C. to form a primary intermediate molded bottle-shaped piece, said preform being orientation area magnified 5 to 13 times to form said primary intermediate molded bottle-shaped piece; then (d) applying heat to said primary intermediate molded bottle-shaped piece for heat treating said primary intermediate molded bottle-shaped piece by heating said primary intermediate molded bottle-shaped piece to a temperature at least 20° C. higher than said temperature of said first heated blow-mold to thermally contract said primary intermediate molded bottle-shaped piece to form a secondary intermediate molded bottle-shaped piece; and (e) biaxial-orientation blow-molding said secondary intermediate molded bottle-shaped piece in a secondary blow-mold, distinct from said first blow-mold, heated at 100° C. to 150° C. to form said bottle-shaped container, said secondary intermediate molded bottle-shaped piece having a substantially small orientation magnification so that almost no residual stress is created in said bottle-shaped container.