JPH02255757A - Heat-formed polyester container - Google Patents
Heat-formed polyester containerInfo
- Publication number
- JPH02255757A JPH02255757A JP1079155A JP7915589A JPH02255757A JP H02255757 A JPH02255757 A JP H02255757A JP 1079155 A JP1079155 A JP 1079155A JP 7915589 A JP7915589 A JP 7915589A JP H02255757 A JPH02255757 A JP H02255757A
- Authority
- JP
- Japan
- Prior art keywords
- fatty acid
- formula
- polyethylene terephthalate
- polyolefin
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920000728 polyester Polymers 0.000 title claims description 7
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 45
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 36
- 239000000194 fatty acid Substances 0.000 claims abstract description 36
- 229930195729 fatty acid Natural products 0.000 claims abstract description 36
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 30
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 30
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 27
- 229920000098 polyolefin Polymers 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000000178 monomer Substances 0.000 claims abstract description 4
- 150000005690 diesters Chemical class 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 3
- 229920001684 low density polyethylene Polymers 0.000 abstract description 5
- 239000004702 low-density polyethylene Substances 0.000 abstract description 5
- 239000004743 Polypropylene Substances 0.000 abstract description 3
- 229920001155 polypropylene Polymers 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 2
- 238000002425 crystallisation Methods 0.000 description 34
- 230000008025 crystallization Effects 0.000 description 34
- 239000000047 product Substances 0.000 description 25
- 238000003856 thermoforming Methods 0.000 description 15
- 230000007423 decrease Effects 0.000 description 10
- 238000000465 moulding Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000002667 nucleating agent Substances 0.000 description 8
- 230000001737 promoting effect Effects 0.000 description 7
- 239000010954 inorganic particle Substances 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- MKCFZBOBBPYAHP-UHFFFAOYSA-N 2-octacosanoyloxyethyl octacosanoate Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCC(=O)OCCOC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCC MKCFZBOBBPYAHP-UHFFFAOYSA-N 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920001634 Copolyester Polymers 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 2
- KZTYYGOKRVBIMI-UHFFFAOYSA-N diphenyl sulfone Chemical compound C=1C=CC=CC=1S(=O)(=O)C1=CC=CC=C1 KZTYYGOKRVBIMI-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- YKIBJOMJPMLJTB-UHFFFAOYSA-M sodium;octacosanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCCCCCCCCCCC([O-])=O YKIBJOMJPMLJTB-UHFFFAOYSA-M 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- HWNXBIIHWXJVHF-UHFFFAOYSA-N 2-heptanoyloxyethyl heptanoate Chemical compound CCCCCCC(=O)OCCOC(=O)CCCCCC HWNXBIIHWXJVHF-UHFFFAOYSA-N 0.000 description 1
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 description 1
- AUGHNCDQDOIWOL-UHFFFAOYSA-N 4-octacosanoyloxybutyl octacosanoate Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCC(=O)OCCCCOC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCC AUGHNCDQDOIWOL-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229910000968 Chilled casting Inorganic materials 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004609 Impact Modifier Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229940053200 antiepileptics fatty acid derivative Drugs 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- FIASKJZPIYCESA-UHFFFAOYSA-L calcium;octacosanoate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCCCCCCCCCCCC([O-])=O FIASKJZPIYCESA-UHFFFAOYSA-L 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 239000011814 protection agent Substances 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〉
本発明は、食品包装用容器、詳しくは成形性に優れた熱
成形ポリエステル容器に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a food packaging container, and more particularly to a thermoformable polyester container with excellent moldability.
（従来の技術〉
ポリエチレンテレフタレートより成るシートを熱成形し
て得られた容器は、電子レンジ／オーブン食品容器とし
て優れた耐熱性を持つが、優れた成形性（特に短い成形
サイクル）と優れた耐衝撃性の両方を兼ね合せた容器は
、未だ開発されていない。(Prior art) Containers obtained by thermoforming polyethylene terephthalate sheets have excellent heat resistance as microwave/oven food containers, but they also have excellent moldability (especially short molding cycles) and excellent durability. A container that is both impact resistant has not yet been developed.
他成分を含まない未変性ポリエステルを熱成形する場合
、高温時の熱安定性を改良するため、結晶化４度を上げ
るには、成形サイクルとして３０〜６０秒を必要とし、
極めて生産性が悪い、またポリエチレンテレフタレート
の結晶化速度を速める為に無機粒子等の核剤、及び衝撃
改善効果奄有するクランク防と剤（好ましくはポリオレ
フィン）を配合した場合、結晶化速度、耐衝撃性は改善
されたが、核剤により該最終製品の結晶化度が上がり過
ぎる為に、衝撃強度、特に低温時の衝撃強度が充分とは
いえなかった。そのため、ポリエチレンテレフタレート
に結晶化促進効果と衝撃改善効果を共有する高分子化合
物（好ましくはポリオレフィン）を配合する方法が考え
られ耐衝撃性は改善されたが、結晶化速度が劣る為、高
速の成形サイクルでは、金型から製品を取りはずす際に
離型不良とり、型くずれを起こし、製品の品位を著しく
低下させるという問題点があった。When thermoforming unmodified polyester that does not contain other components, in order to improve thermal stability at high temperatures, a molding cycle of 30 to 60 seconds is required to increase the degree of crystallization.
Productivity is extremely low, and when a nucleating agent such as inorganic particles is added to speed up the crystallization rate of polyethylene terephthalate, and a crank protection agent (preferably polyolefin) that has an impact-improving effect is added, the crystallization rate and impact resistance are extremely low. Although the properties were improved, the crystallinity of the final product increased too much due to the nucleating agent, so the impact strength, especially the impact strength at low temperatures, was not sufficient. Therefore, a method of blending polyethylene terephthalate with a polymer compound (preferably polyolefin) that shares the effect of promoting crystallization and improving impact has been considered, and the impact resistance has been improved, but the crystallization rate is poor, so high-speed molding In the cycle, there is a problem in that when the product is removed from the mold, the mold release is poor and the mold collapses, which significantly deteriorates the quality of the product.
また、特開昭５８−６３７４３号公報には、ボＪエチレ
ンテレフタレートにカルボキシル基の金属塩を有する高
分子化合物などの結晶化促進剤及び変性ポリオレフィン
などの衝盤改善剤を配合し、射出成形サイクルを短くす
ることが開示されているが、変性ポリオレフィンを使用
するため、熱で着色したり、耐熱性や成形時における離
形性が劣るという問題が生じる。Furthermore, in JP-A No. 58-63743, a crystallization accelerator such as a polymer compound having a metal salt of a carboxyl group and a impact improver such as a modified polyolefin are blended with BoJ ethylene terephthalate, and the injection molding cycle is However, since a modified polyolefin is used, there are problems such as coloration due to heat and poor heat resistance and mold release properties during molding.
本発明者等は、この様な従来の問題点を解決する為に鋭
意検討した結果、脂肪酸より誘導された脂肪酸のジエス
テルあるいは脂肪酸の金属塩を配合することにより、優
れた成形性、耐衝撃強度を得ることができることを見出
し本発明に至った。As a result of intensive studies to solve these conventional problems, the present inventors have found that by blending fatty acid diesters derived from fatty acids or fatty acid metal salts, excellent moldability and impact resistance strength can be achieved. The present invention was based on the discovery that it is possible to obtain the following.
〈問題を解決する為の手段〉
固有粘度０．６〜１．１のポリエチレンテレフタレ＝１
・１００重量部に対して、炭素原子２〜６個を含有する
モノマーより誘導された繰返し単位を有するポリオレフ
ィン１．０〜・１０重量部及び脂肪酸から誘導された下
記式ＣＩ）で示される脂肪酸のジエステル及び／又は（
＋１）で示される脂肪酸の金属塩０．Ｏ１〜２．０重量
部を配合した組成物から成る熱成形ポリエステル容器。<Means for solving the problem> Polyethylene terephthalate with an intrinsic viscosity of 0.6 to 1.1 = 1
-1.0 to 10 parts by weight of a polyolefin having a repeating unit derived from a monomer containing 2 to 6 carbon atoms per 100 parts by weight, and a fatty acid represented by the following formula CI) derived from a fatty acid. diester and/or (
+1) Metal salt of fatty acid 0. A thermoformed polyester container comprising a composition containing 1 to 2.0 parts by weight of O.
Ｒ＋ Ｇ Ｏ（ＣＨｚ ）ヨー０〜Ｃ−Ｒ，（１
：１（Ｒ，３−ＣＯＯ） ｖ Ｍ−（Ｉ［）（但し式（
１）（ｎ）中のＲ１，Ｒｚ 、Ｒ３はそれぞれ賢ＣＨ，
汁、ＣＨ３
刊ＣＨｆｆｉ辷ムＣＨｆｆ 、−（ＣＨｆｆｉヒ、ＣＨ
，であって、ｍ＝１３〜３．２．ｉ！−１３〜３２．ｎ
＝８〜３２である０式（１）中のＸはＸ−１〜８．式（
ＩＩ）中のＭ、は金属であり、ＹはＭ、の金属の価数と
一致し、Ｙとｎの積が２０〜９６である。）以下に本発
明の構成要件を具体的に詳述する。R+ GO (CHz) Yo 0~C-R, (1
:1(R,3-COO) v M-(I[) (where the formula (
1) R1, Rz and R3 in (n) are Ken CH,
Soup, CH3 Published by CHffi
, where m=13 to 3.2. i! -13~32. n
=8 to 32.X in formula (1) is X-1 to 8. formula(
In II), M is a metal, Y matches the valence of the metal in M, and the product of Y and n is 20 to 96. ) Below, the constituent elements of the present invention will be specifically explained in detail.
本発明を構成する第１の要件であるマトリックスとなる
ポリエステルとはポリエチレンテレフタレートのホモポ
リマーは勿論のこと、テトフタル酸成分の一部をイソフ
タル酸、アジピン酸、ジフェニルジカルボン酸、ジフェ
ニルエーテルジカルボン酸、ジフェニルスルフォンジカ
ルボン酸、セパチン酸、ナフタレンジカルボン酸等の如
き他の１種以上のジカルボン酸成分へ置換し、エチレン
グリコール成分の一部をジエチレングリコール。The polyester that becomes the matrix, which is the first requirement constituting the present invention, is not only a homopolymer of polyethylene terephthalate, but also a part of the tetophthalic acid component, such as isophthalic acid, adipic acid, diphenyl dicarboxylic acid, diphenyl ether dicarboxylic acid, diphenyl sulfone. Substituting one or more other dicarboxylic acid components such as dicarboxylic acid, sepatic acid, naphthalene dicarboxylic acid, etc., and replacing a portion of the ethylene glycol component with diethylene glycol.
ヘキサメチレングリコール、トリメチレングリコール、
プロピレングリコール、シクロヘキサンジメタツール、
ネオペンチルグリコール、ブチレングリコール等の如き
他の１種以上のグリコール成分で置換したコポリエステ
ルを包含する。該コポリエステル中の共重合成分の総割
合は全酸成分に対して５モル％以下であることが好まし
い。又、ポリエステル中にカーボンブラック、タルク、
マイカ、二酸化チタン、炭酸カルシウム、アルミナ。hexamethylene glycol, trimethylene glycol,
propylene glycol, cyclohexane dimetatool,
Includes copolyesters substituted with one or more other glycol components such as neopentyl glycol, butylene glycol, and the like. The total proportion of copolymerized components in the copolyester is preferably 5 mol % or less based on the total acid components. In addition, carbon black, talc,
Mica, titanium dioxide, calcium carbonate, alumina.
シリカ、ワラストナイト、カオリン等の無機粒子を含有
する事が出来る。しかしながら、本発明において、上記
無機粒子は製品の低温時の衝撃強度低下を引き起こす為
、１０重量％以下、特に５重量％以下が好ましい。It can contain inorganic particles such as silica, wollastonite, and kaolin. However, in the present invention, the inorganic particles cause a decrease in the impact strength of the product at low temperatures, so it is preferably 10% by weight or less, particularly 5% by weight or less.
ポリエチレンテレフタレートの固有粘度は、２０℃に於
て、重量比６０／４０のフェノール／テトラクロロエタ
ン混合溶媒中での測定において、０．６〜１．１が必要
であり、好ましくは０．７５〜１．０である。固有粘度
の低いポリエチレンテレフタレートの方が結晶化速度の
点からでは有利であるが、低温衝撃が低（なる為、少な
くとも０．６が必要で好ましくは０．７５以上である。The intrinsic viscosity of polyethylene terephthalate is required to be 0.6 to 1.1, preferably 0.75 to 1, when measured at 20°C in a mixed solvent of phenol/tetrachloroethane at a weight ratio of 60/40. .0. Polyethylene terephthalate, which has a lower intrinsic viscosity, is more advantageous in terms of crystallization rate, but has a lower low-temperature impact, so it needs to be at least 0.6, preferably 0.75 or more.
逆に固有粘度が１．１を超えるものは低温時の衝撃強度
に対して有利であるが、熱成形の際の結晶化速度が遅く
なり、金型面への粘着を起こす為、成形サイクルを上げ
る場合には不利である。On the other hand, those with an intrinsic viscosity of more than 1.1 are advantageous in terms of impact strength at low temperatures, but the crystallization rate during thermoforming slows down and causes adhesion to the mold surface, making it difficult to shorten the molding cycle. It is disadvantageous if you raise it.
第２の構成要件は、ポリエチレンテレフタレートの結晶
化度上昇に伴なう、耐衝撃性の低下を抑制する為のポリ
オレフィンである。一般にポリオレフィンは、ポリエチ
レンテレフタレートに比ベガラス転移点が低く、衝撃に
対し抗力を有する。The second component is a polyolefin for suppressing a decrease in impact resistance due to an increase in crystallinity of polyethylene terephthalate. In general, polyolefins have a lower glass transition point than polyethylene terephthalate and have resistance to impact.
従ってポリオレフィンを配合することにより結晶化度を
上げたポリエチレンテレフタレートの耐衝撃性を向上さ
せる事が出来る。Therefore, by blending polyolefin, it is possible to improve the impact resistance of polyethylene terephthalate with increased crystallinity.
本発明に用いられるポリオレフィンとしては炭素数２〜
６個を含有するモノマーより誘導された繰り返し単位を
有するものが適当であり、低密度ポリエチレン、線状低
密度ポリエチレン、高密度ポリエチレン、ポリプロピレ
ン、ポリブテン、ポリペンテン、ポリメチルペンテン、
が例として挙げられる。中でも低密度ポリエチレン及び
ポリプロピレンが好ましい、該ポリオレフィンの配合量
は、ポリエチレンテレフタレート１００重量部に対して
１〜１０重量部が必要であり、２〜６重量部が好ましい
、１重量部未満では結晶化度が高くなったポリエチレン
テレフタレートの衝撃強度を上げる事は難しい、一方、
１０重量部を超えると耐熱性の低下が大きくなり％２０
０℃を超える使用に充分耐えることが出来なくなる。The polyolefin used in the present invention has 2 or more carbon atoms.
Those having repeating units derived from monomers containing 6 are suitable, such as low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, polybutene, polypentene, polymethylpentene,
is given as an example. Among them, low-density polyethylene and polypropylene are preferred.The blending amount of the polyolefin is 1 to 10 parts by weight, preferably 2 to 6 parts by weight, per 100 parts by weight of polyethylene terephthalate.If it is less than 1 part by weight, the crystallinity It is difficult to increase the impact strength of polyethylene terephthalate, which has a high
If it exceeds 10 parts by weight, the heat resistance will decrease significantly.%20
It becomes impossible to withstand use at temperatures exceeding 0°C.
本発明の第３の構成要件は熱成形時のポリエチレンテレ
フタレートの結晶化速度を促進する効果のある脂肪酸か
ら誘導された下記式（ｉで示される脂肪酸のジエステル
及び／又は〔■〕で示される脂肪酸の金属塩である。The third component of the present invention is a diester of a fatty acid represented by the following formula (i) and/or a fatty acid represented by [■] derived from a fatty acid that is effective in accelerating the crystallization rate of polyethylene terephthalate during thermoforming. It is a metal salt of
ＣＲｓ ＣＯＯ） ｖ Ｍ−（１１）（但し
式（１） （Ｉ［）中のＲ＋ 、Ｒｚ 、Ｒｓはそれ
ぞれ賢ＣＨｔ ）−ｓ ＣＨ５
−（ＣＨ、ヒＩＣＨＩ、賢ＣＨｔヒ−ＣＨｘであって、
ｍ＝１３〜３２． １−１３〜３２．ｎ＝８〜３２であ
る０式ＣＩ）中のＸはｘ＝ｌ 〜８＋ 式（［１）中の
Ｍ、は金属であり、ＹはＭ、の金属の価数と一致し、Ｙ
とｎの積が２０〜９６である。）本発明に用いられる脂
肪酸ジエステルとしては、プチレンビスモンタネート、
エチレンビスモンタネート、メチレンビスモンタネート
、エチレンビスメリシネート、エチレンビスヘプタネー
ト等が挙げられ、脂肪酸金属塩としてはモンタン酸ナト
リウム、モンクン酸マグネシウム、モンクン酸カルシウ
ム、ヘプタコサン酸ナトリウム、メリシン酸ナトリウム
等が挙げられるが、中でもエチレンビスモンタネート、
モンクン酸ナトリウムが好ましい。CRs COO) v M-(11) (Formula (1) (R+, Rz, Rs in I[) are each CHt)-s CH5-(CH, hiICHI, kenCHthi-CHx,
m=13-32. 1-13~32. X in formula CI) where n = 8 to 32 is x = l to 8+ M in formula ([1) is a metal, Y matches the valence of the metal in
The product of and n is 20 to 96. ) The fatty acid diesters used in the present invention include butylene bismontanate,
Examples include ethylene bismontanate, methylene bismontanate, ethylene bismericinate, ethylene bisheptanate, etc., and examples of fatty acid metal salts include sodium montanate, magnesium moncate, calcium montanate, sodium heptacanoate, sodium melisinate, etc. Among them, ethylene bismontanate,
Sodium moncitate is preferred.
上記（１）式の云ＣＨ，ヒ、の部分が
如く、側鎖があっても構わないが側鎖の長さや数は、少
ない方が好ましい。Although there may be a side chain, as in the CH, H portion of the above formula (1), it is preferable that the length and number of side chains be small.
（１）式の脂肪酸ジエステルのメチル基の数ｍ。The number m of methyl groups in the fatty acid diester of formula (1).
ｌが１３未満の場合、熱成形時のプレートアウトが発生
する傾向があり、金型を汚す危険が大きく、また熱劣化
が起こるため適当でない、一方、Ｘが１０より大きい場
合やｍ、 ｊ！が３２より大きい場合においては、ポ
リエチレンテレフタレートとの相溶性が悪くなるため、
大巾な結晶化促進効果は得られない。When l is less than 13, plate-out tends to occur during thermoforming, there is a great risk of contaminating the mold, and thermal deterioration occurs, so it is not suitable.On the other hand, when X is greater than 10, m, j! is larger than 32, the compatibility with polyethylene terephthalate deteriorates,
No significant crystallization promoting effect can be obtained.
同様に、（１１）式におけるＹとｎの積は、２０〜９６
であり、９６より大きい場合には、ポリエチレンテレフ
タレートとの相溶性が悪くなり、充分な結晶化促進効果
が得られない、〔■〕式中のＭｅはＣａ”、Ｎａ′″、
Ａｌｔ″−、Ｍｇｔ−の如き、アルカリ金属及びアルカ
リ土類金属等が好ましい。Similarly, the product of Y and n in equation (11) is 20 to 96
If it is larger than 96, the compatibility with polyethylene terephthalate becomes poor and a sufficient crystallization promoting effect cannot be obtained. [■] In the formula, Me is Ca", Na'",
Preferred are alkali metals and alkaline earth metals such as Alt''- and Mgt-.
該脂肪酸ジエステル及び／又は該脂肪酸金属塩の配合量
はポリエチレンテレフタレート１００重量部に対して０
．０１〜２．０重量部が必要であり、０．１〜１．０重
量部が好ましい。０．０１重量部未満では、充分な結晶
化促進効果が得られず、結晶化させる為の熱処理温度を
高くしたり、処理時間を長くしなければならない、一方
、配合量が２．０重量部以上配合した場合には、熱成形
時にプレートアウトして金型を汚す恐れがある上、大き
な結晶化促進効果も見られず、また配合量の増加にとも
ない分子量低下を引き起こすため不適である。The amount of the fatty acid diester and/or the fatty acid metal salt is 0 to 100 parts by weight of polyethylene terephthalate.
．． 0.01 to 2.0 parts by weight are required, preferably 0.1 to 1.0 parts by weight. If the amount is less than 0.01 part by weight, a sufficient crystallization promoting effect cannot be obtained, and the heat treatment temperature for crystallization must be increased or the treatment time must be lengthened. On the other hand, if the amount is 2.0 parts by weight, If the above content is used, it is unsuitable because there is a risk of plate-out during thermoforming and contamination of the mold, no significant effect of promoting crystallization is observed, and molecular weight decreases as the amount added increases.
さらに、脂肪酸から誘導された下記式（ｉ）及び／又は
（ｉｉ ）で示される脂肪酸アミド０．０１〜２．０重
量部を配合させると、結晶化促進効果が大きくなる。Furthermore, when 0.01 to 2.0 parts by weight of a fatty acid amide derived from a fatty acid and represented by the following formula (i) and/or (ii) is blended, the effect of promoting crystallization is increased.
Ｒ１−ＣＯＮＨｚ （＋）ＨＮ （Ｃ
Ｈｚ ｆ −Ｎ Ｈ
（但し式（ｉ）（ｉｉ）中のＲ１，Ｒｔ 、Ｒｓはそれ
ぞれ嵌ＣＨｔヒ−ＣＨ３
−４，ＣＨｚヒ又ＣＨｓ、云ＣＨｔヒ、ＣＨｓでありｍ
＝１３〜３３．１＝１〜３３．ｐ−７〜３３であり、式
（ｉｉ ）中のｎはｎ＝１〜１０である。）ところで、
ポリエチレンテレフタレートは結晶化度を上げることに
よって耐熱性は向上するが一方では固く脆くなるという
性質がある為、結晶化度を不必要に高くする事は好まし
くない、一般に製品の結晶化度は１５〜３０％程度が適
当とされている。製品の結晶化度が１５％未満では熱成
形品取出持金型に粘着する為、充分な寸法安定性が得ら
れない、一方、製品の結晶化度が３０％を超えてくると
、衝撃強度、特に低温時の衝撃強度が低下する傾向があ
る。製品の結晶化度が３５％を大巾に超える場合には搬
送時及び販売店や家庭での取扱い時に容器の破損が多く
なる。一般に無機系核剤を使用した場合、結晶化速度は
速く、成形サイクルは短縮されるが、シート押出時にポ
リエチレンテレフタレートの分子量低下を引き起こした
り、熱成形時の到達結晶化度が、必要以上に高くなって
、耐衝撃性を低下さセる傾向がある。−方、高分子系核
剤を使用する場合はポリエチレンテレフタレートの分子
量低下は見られず、熱成形時の到達結晶化度も低く抑え
られる為に耐衝撃性に優れた製品を得る事が可能である
。しかし、高速で熱成形を行う場合には、結晶化速度が
充分でない為製品を金型から容易に取りはずす為に必要
な結晶化度に達せず、著しい外観の不良（変形）を引き
起こす、又、成形サイクルを長くしても結晶化速度が不
充分である為、高い金型温度が必要となり、生産時の微
妙な温度変化であっても不良品の発生が多い。R1-CONHz (+)HN (C
Hz f -NH (However, R1, Rt, and Rs in formulas (i) and (ii) are respectively 錑CHt HI - CH3 -4, CHz HI, CHs, 云CHt HI, CHs, and m
=13~33.1=1~33. p-7 to 33, and n in formula (ii) is n=1 to 10. )by the way,
Increasing the crystallinity of polyethylene terephthalate improves its heat resistance, but it also has the property of becoming hard and brittle, so it is undesirable to unnecessarily increase the crystallinity of the product.In general, the crystallinity of the product is 15 or more. Approximately 30% is considered appropriate. If the crystallinity of the product is less than 15%, it will stick to the mold for taking out the thermoformed product, making it impossible to obtain sufficient dimensional stability.On the other hand, if the crystallinity of the product exceeds 30%, the impact strength will deteriorate. , especially the impact strength at low temperatures tends to decrease. If the crystallinity of the product greatly exceeds 35%, the container will often be damaged during transportation and handling at retail stores and homes. Generally, when an inorganic nucleating agent is used, the crystallization rate is fast and the molding cycle is shortened, but it may cause a decrease in the molecular weight of polyethylene terephthalate during sheet extrusion, or the crystallinity reached during thermoforming may be higher than necessary. This tends to reduce impact resistance. -On the other hand, when a polymeric nucleating agent is used, no decrease in the molecular weight of polyethylene terephthalate is observed, and the crystallinity reached during thermoforming can be kept low, making it possible to obtain products with excellent impact resistance. be. However, when thermoforming is carried out at high speeds, the crystallization rate is not sufficient and the degree of crystallinity necessary to easily remove the product from the mold cannot be achieved, resulting in significant appearance defects (deformation). Even if the molding cycle is lengthened, the crystallization rate is insufficient, so a high mold temperature is required, and even slight temperature changes during production often result in defective products.
ところが、ポリエチレンテレフタレートにポリオレフィ
ン及び脂肪酸ジエステルあるはい脂肪酸の金属塩さらに
脂肪酸アミドを配合した場合には、結晶化速度が大巾に
向上し、特に低温度での結晶化速度が著しく高められる
為高速での熱成形が安定して行われることが可能となる
事を見出した。However, when polyolefins, fatty acid diesters, metal salts of fatty acids, and fatty acid amides are blended with polyethylene terephthalate, the crystallization rate is greatly improved, especially at low temperatures, so that high-speed crystallization is possible. It has been found that thermoforming can be performed stably.
本発明のポリマー組成物は、低温金型での高速熱成形が
可能となり又、成形温度条件中の拡大や、生産時の温度
変化による不良品発生の割合低下も可能である。更に、
無機系核剤使用時に見られた、分子量低下や熟成形時の
不必要な結晶化度の上昇は見られず、素早く、安定な結
晶化度に達する為、得られた製品は低温衝撃に非常に優
れたものが得られる。The polymer composition of the present invention enables high-speed thermoforming in a low-temperature mold, expands the molding temperature conditions, and reduces the rate of defective products due to temperature changes during production. Furthermore,
There is no decrease in molecular weight or unnecessary increase in crystallinity during ripening, which occurs when inorganic nucleating agents are used, and the resulting product quickly reaches a stable crystallinity, making it highly resistant to low-temperature shock. You can get excellent results.
本発明に於いて、前記脂肪酸誘導体の配合により、何故
ポリエチレンテレフタレートの結晶化が大巾に促進する
かについては明らかではないが、脂肪酸誘導体のみ又は
、前記脂肪酸誘導体のみ配合の場合、結晶化開始温度の
低下はあるが、大巾な結晶化促進効果はないこと、及び
ポリオレフィン等の核剤併用により、はじめて著しい結
晶化促進効果が発現することから、脂肪酸誘導体は、熱
を受けた時のポリエステルポリマーセグメントを動き易
くさせることによって結晶化開始温度を低温側に移行さ
せ、無機粒子やポリオレフィン等の核から成長するポリ
エチレンテレフタレートの結晶の成長速度を高める作用
を持っていると考えられ、また、脂肪酸のジエステルま
たは、脂肪酸の金属塩に脂肪酸アミドを併用することに
よって結晶化促進効果が大きくなる。In the present invention, it is not clear why the crystallization of polyethylene terephthalate is greatly promoted by blending the fatty acid derivative, but when only the fatty acid derivative or only the fatty acid derivative is blended, the crystallization initiation temperature Although there is a decrease in By making the segments easier to move, it is thought to have the effect of shifting the crystallization initiation temperature to a lower temperature side and increasing the growth rate of polyethylene terephthalate crystals that grow from the core of inorganic particles or polyolefin. By using a diester or a fatty acid metal salt together with a fatty acid amide, the effect of promoting crystallization becomes greater.
本発明は、優れたハイサイクル性、衝撃強度を有するが
約１４０〜１７０℃で熱成形された製品が実際に電子レ
ンジ／オーブンで２００℃以上で加熱調理される時には
、結晶化度が更に上昇し、４０〜５５％程度になるので
充分な耐熱性を有していることは言うまでもない。The present invention has excellent high cycle performance and impact strength, but when a product thermoformed at about 140 to 170°C is actually cooked at 200°C or higher in a microwave/oven, the degree of crystallinity increases further. However, since it is about 40 to 55%, it goes without saying that it has sufficient heat resistance.
本発明容器は、高い結晶化度による改善された低温衝撃
強度及び高温使用時に高められた結晶化度による優れた
耐熱性が得られるという極めて秀でた特性を備えており
、ＴＶディナーと称される調理法冷凍食品容器等に最適
である。The container of the present invention has extremely excellent properties such as improved low-temperature impact strength due to high crystallinity and excellent heat resistance due to increased crystallinity when used at high temperatures, and is called TV dinner. Ideal for frozen food containers, etc.
〈実施例〉 以下、実施例によって本発明を更に具体的に説明する。<Example> Hereinafter, the present invention will be explained in more detail with reference to Examples.
（実施例１〜９．比較例１〜７）
２０℃の重量比６０／４０のフェノール／テトラクロロ
エタン混合溶媒中で測定した固を粘度が下記表−１に示
されるポリエチレンテレフタレートを水分率０．０１％
以下になるように乾燥させ、表−１に示した組成のポリ
オレフィン（低密度ポリエチレン）及び脂肪酸誘導体（
実施例１〜８及び比較例１〜７にはモンタン酸ナトリウ
ム、実施例９はエチレンビスモンタネートを配合）ある
いは添加剤（粒径５μであるタルク）をトライブレンド
し、９０ｍｍφの単一スクリューフィルム押出機により
シートを作製した。該シートは直接チルドキャスティン
グロール上に押出され急冷される０次いで該シートを予
熱し柔かい状態にし、雌型を取り付けた熱成形機によっ
て成形を行った。(Examples 1 to 9. Comparative Examples 1 to 7) Polyethylene terephthalate having a solid viscosity measured in a mixed solvent of phenol/tetrachloroethane with a weight ratio of 60/40 at 20°C and whose viscosity is shown in Table 1 below was mixed with a water content of 0. 01%
Polyolefin (low-density polyethylene) and fatty acid derivatives (low-density polyethylene) with the composition shown in Table 1 were
Examples 1 to 8 and Comparative Examples 1 to 7 contained sodium montanate, and Example 9 contained ethylene bismontanate) or an additive (talc with a particle size of 5 μm) was triblended, and a single screw film of 90 mmφ was prepared. A sheet was produced using an extruder. The sheet was directly extruded onto a chilled casting roll and rapidly cooled.The sheet was then preheated to a soft state and molded using a thermoforming machine equipped with a female die.
以下の実施例において縦１５７ ｍ ｍ ｘ横１１０ｍ
ｍｘ深さ１．ｍｍの容器を作製し、下記の事項について
評価を行った。In the following examples, length: 157 mm x width: 110 m
mx depth 1. A container with a diameter of 1 mm was prepared, and the following items were evaluated.
１、 耐衝撃性：容器に水２００ｇ入れシールし、３０
℃中で２４時間放置、コンクリート床面に容器の底部を
下にして落下させ５０％破壊時の高さを測定、６０ｃｍ
未満を×、６０〜８０Ｃｍを△、８０ｃｍ以上を○とし
た。1. Impact resistance: Put 200g of water in a container and seal it.
Leave the container in ℃ for 24 hours, drop the container bottom down onto the concrete floor, and measure the height at 50% destruction, 60 cm.
Less than 1 cm was rated as x, 60 to 80 cm was rated as Δ, and 80 cm or more was rated as ○.
２、Ｎ型性：成形体を金型より離型させた時の形状のく
ずれ状態にて評価、金型通りの形状で円滑に成形体が取
り出せた場合０２寸法が０〜２ｍｍ伸びた形状で取り出
された場合を△、２ｍｍ以上伸びた形状で取り出された
場合を×とした。2. N-type property: Evaluate the state of the shape when the molded product is released from the mold. If the molded product can be taken out smoothly with the shape as per the mold, the 02 dimension will be extended by 0 to 2 mm. A case where the sample was removed was rated as △, and a case where the sample was removed with a shape that was elongated by 2 mm or more was graded as ×.
３、 耐熱性：成形品を２２０ｔのオーブンに６０分間
放置、全く変形のないものをＯ２容器側部のふくれや底
部のへこみが２ ｍ ｍ以内の場合を△＋２ｍｍ以上の
場合を×とした。但し、良好な外観を有する成形品が得
られたもののみ評価を行った。3. Heat resistance: The molded product was left in a 220 ton oven for 60 minutes, and those with no deformation were evaluated as Δ if the bulge on the side of the O2 container or dent in the bottom was within 2 mm, and × if it was 2 mm or more. However, only those molded products from which good appearance was obtained were evaluated.
４、 金型汚れ二金型汚れがあるものを×、無いものを
○、多少あるものを△とする。4. Mold stains 2. Mark as × for mold stains, ○ for no mold stains, and △ for some mold stains.
結果を表−１に示す。The results are shown in Table-1.
ポリエチレンテレフタレートの固有粘度が０．６未満の
場合、結晶化は素速く進行し、離型性に優れるけれども
、衝撃改善剤としてのポリオレフィンを配合しても衝撃
強度に著しく劣り好ましくないや一方、固有粘度が１．
１よりも大きい場合には、結晶化の進行が遅い為に、金
型からの離型性が悪くなる。本発明においてポリエチレ
ンテレフタレートの固有粘度は０．７〜１．０のものが
好ましいことが判る。一般にポリエチレンテレフタレー
トは結晶化速度が遅いが、ポリオレフィンあるいは無機
粒子等の核剤を配合したものは、結晶化が促進され、１
０秒以内のサイクルで熱成形を行うことができる。しか
し核剤にポリオレフィンを配合したものは、耐衝撃性に
優れるが、結晶化速度が不充分であり、成形サイクルを
７秒以下にした場合に金型からの離型不良を起こす、一
般にポリオレフィンの配合量を増やす事により、熱成形
時の金型離型は改良されるが反面耐熱性が低下する傾向
があり、ポリオレフィンを１０％以上含むものは２２０
℃以上の使用には不適である。又、比較的低粘度のＰＥ
Ｔにポリオレフィンを配合する事により結晶化速度が改
善され金型離型性は向上するが、反面ポリオレフィンの
衝撃改善効果は著しく低下する。If the intrinsic viscosity of polyethylene terephthalate is less than 0.6, crystallization will proceed quickly and the mold releasability will be excellent. Viscosity is 1.
If it is larger than 1, the progress of crystallization is slow, resulting in poor release properties from the mold. It can be seen that in the present invention, polyethylene terephthalate preferably has an intrinsic viscosity of 0.7 to 1.0. Generally, polyethylene terephthalate has a slow crystallization rate, but those containing a nucleating agent such as polyolefin or inorganic particles accelerate crystallization and
Thermoforming can be performed in a cycle of less than 0 seconds. However, products containing polyolefin as a nucleating agent have excellent impact resistance, but their crystallization speed is insufficient, resulting in poor release from the mold when the molding cycle is less than 7 seconds. By increasing the blending amount, mold release during thermoforming is improved, but on the other hand, heat resistance tends to decrease, and those containing 10% or more of polyolefin are
Not suitable for use above ℃. In addition, relatively low viscosity PE
By blending polyolefin with T, the crystallization rate is improved and the mold releasability is improved, but on the other hand, the impact improving effect of the polyolefin is significantly reduced.
一方、核剤にタルク等の無機粒子を配合した場合、結晶
化速度が素速く進行し、離型性に優れるけれども耐衝撃
性に劣り、衝撃改善剤としてのポリオレフィンを併用し
た場合においてもその傾向は変らない、しかし、ポリオ
レフィンと脂肪酸ジエステルあるいは脂肪酸の金属塩を
配合した場合は、結晶化開始温度が低下し、又、結晶化
速度が大巾に向上している為、低温金型による高速熱成
形が可能となる。又、得られた製品の外観及び物性（耐
熱性・低温衝撃強度）は非常に優れたものであった。On the other hand, when inorganic particles such as talc are blended into the nucleating agent, the crystallization rate progresses quickly and the mold release properties are excellent, but the impact resistance is poor, and this tendency also occurs when polyolefin as an impact modifier is used together. However, when polyolefin and fatty acid diester or fatty acid metal salt are blended, the crystallization initiation temperature is lowered and the crystallization rate is greatly improved, so high-speed heating by low-temperature molds is possible. Molding becomes possible. Moreover, the appearance and physical properties (heat resistance and low-temperature impact strength) of the obtained product were very excellent.
〈発明の効果）
特定の固有粘度を有するポリエチレンテレフタレートに
ポリオレフィン及び本発明における脂肪酸ジエステルあ
るいは脂肪酸の金属塩を特定量配合することにより、熱
成形時の結晶化速度をはやめることかでき、成形性が改
善され、かつ得られた成形品は耐衝撃性及び耐熱性が優
れていることがわかった。本発明は、電子レンジ／オー
ブン用食品容器とＬ７て実用可能であり、有用な熱成形
ポリエステル容器を提供し得ることが明らかである。(Effects of the invention) By blending a polyolefin and a specific amount of the fatty acid diester or fatty acid metal salt of the present invention into polyethylene terephthalate having a specific intrinsic viscosity, the crystallization rate during thermoforming can be reduced, improving moldability. was found to be improved, and the resulting molded product was found to have excellent impact resistance and heat resistance. It is clear that the present invention can be practiced with microwave/oven food containers and provide useful thermoformed polyester containers.
Claims (1)
１００重量部に対して、炭素原子２〜６個を含有するモ
ノマーより誘導された繰返し単位を有するポリオレフィ
ン１．０〜１０重量部及び脂肪酸から誘導された下記式
〔 I 〕で示される脂肪酸のジエステル及び／又は〔II
〕で示される脂肪酸の金属塩０．０１〜２．０重量部を
配合した組成物から成る熱成形ポリエステル容器。 ▲数式、化学式、表等があります▼〔 I 〕 （Ｒ＿３−ＣＯＯ）＿ＹＭ＿ｅ〔II〕 （但し式〔 I 〕〔II〕中のＲ＿１、Ｒ＿２、Ｒ＿３は
それぞれ▲数式、化学式、表等があります▼、 ▲数式、化学式、表等があります▼であって、ｍ＝１３
〜３２、ｌ＝１３〜３２、ｎ＝８〜３２である。式〔
I 〕中のｘはｘ＝１〜８、式〔II〕中のＭ＿ｅは金属で
あり、ＹはＭ＿ｅの金属の価数と一致し、Ｙとｎの積が
２０〜９６である。）[Scope of Claims] 1.0 to 10 parts by weight of polyolefin having a repeating unit derived from a monomer containing 2 to 6 carbon atoms per 100 parts by weight of polyethylene terephthalate having an intrinsic viscosity of 0.6 to 1.1. Diesters of fatty acids represented by the following formula [I] and/or [II] derived from fatty acids and
] A thermoformed polyester container comprising a composition containing 0.01 to 2.0 parts by weight of a metal salt of a fatty acid. ▲There are mathematical formulas, chemical formulas, tables, etc.▼[I] (R_3-COO)_YM_e[II] (However, R_1, R_2, R_3 in the formula [I] [II] each have ▲mathematical formulas, chemical formulas, tables, etc.▼ , ▲There are mathematical formulas, chemical formulas, tables, etc.▼, and m = 13
~32, l=13-32, n=8-32. formula〔
I], x=1 to 8, M_e in formula [II] is a metal, Y matches the valence of the metal of M_e, and the product of Y and n is 20 to 96. )
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7915589A JP2614200B2 (en) | 1989-03-29 | 1989-03-29 | Thermoformed polyester container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7915589A JP2614200B2 (en) | 1989-03-29 | 1989-03-29 | Thermoformed polyester container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02255757A true JPH02255757A (en) | 1990-10-16 |
| JP2614200B2 JP2614200B2 (en) | 1997-05-28 |
Family
ID=13682073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7915589A Expired - Fee Related JP2614200B2 (en) | 1989-03-29 | 1989-03-29 | Thermoformed polyester container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2614200B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010215760A (en) * | 2009-03-16 | 2010-09-30 | Daiwa Can Co Ltd | Polyester resin composition, polyester container and polyester-laminated paper container using the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925654A (en) | 2008-01-24 | 2010-12-22 | 纳幕尔杜邦公司 | Polyesters modified by combination of ionomer and organic acid salts |
| US8697804B1 (en) | 2008-01-24 | 2014-04-15 | E I Du Pont De Nemours And Company | Nucleated poly(trimethylene terephthalate) |
| US8716404B1 (en) | 2008-01-24 | 2014-05-06 | E I Du Pont De Nemours And Company | Polyesters modified by a combination of ionomer and fatty acid salts |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562342A (en) * | 1979-06-21 | 1981-01-12 | Mitsubishi Rayon Co Ltd | Hollow vessel made of polyester resin |
| JPS62227947A (en) * | 1986-03-31 | 1987-10-06 | Teijin Ltd | Polyester sheet |
| JPS62290751A (en) * | 1986-06-11 | 1987-12-17 | Mitsubishi Rayon Co Ltd | Polyethylene terephthalate resin composition |
| JPS63172740A (en) * | 1987-01-09 | 1988-07-16 | Teijin Ltd | Polyester sheet and its production |
-
1989
- 1989-03-29 JP JP7915589A patent/JP2614200B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562342A (en) * | 1979-06-21 | 1981-01-12 | Mitsubishi Rayon Co Ltd | Hollow vessel made of polyester resin |
| JPS62227947A (en) * | 1986-03-31 | 1987-10-06 | Teijin Ltd | Polyester sheet |
| JPS62290751A (en) * | 1986-06-11 | 1987-12-17 | Mitsubishi Rayon Co Ltd | Polyethylene terephthalate resin composition |
| JPS63172740A (en) * | 1987-01-09 | 1988-07-16 | Teijin Ltd | Polyester sheet and its production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010215760A (en) * | 2009-03-16 | 2010-09-30 | Daiwa Can Co Ltd | Polyester resin composition, polyester container and polyester-laminated paper container using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2614200B2 (en) | 1997-05-28 |
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