JPH03289453A - Heat-resistant cap - Google Patents
Heat-resistant capInfo
- Publication number
- JPH03289453A JPH03289453A JP2142161A JP14216190A JPH03289453A JP H03289453 A JPH03289453 A JP H03289453A JP 2142161 A JP2142161 A JP 2142161A JP 14216190 A JP14216190 A JP 14216190A JP H03289453 A JPH03289453 A JP H03289453A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- copolymer
- homopolymer
- liner
- resistant cap
- 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
- 239000000463 material Substances 0.000 claims abstract description 21
- 229920001577 copolymer Polymers 0.000 claims abstract description 19
- 229920001519 homopolymer Polymers 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000005977 Ethylene Substances 0.000 claims abstract description 7
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 7
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 7
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 239000000178 monomer Substances 0.000 claims abstract description 4
- 239000004711 α-olefin Substances 0.000 claims abstract 3
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000035882 stress Effects 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 235000013361 beverage Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000006353 environmental stress Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000007719 peel strength test Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229920001862 ultra low molecular weight polyethylene Polymers 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
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
- B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は耐熱キャップに関し 更に詳しく頃合成樹脂を
主成分としたライナー材で内面がライナー処理された耐
熱キャップに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat-resistant cap, and more particularly to a heat-resistant cap whose inner surface is lined with a liner material mainly composed of synthetic resin.
従東 合成樹脂で内側をライナー処理された耐熱キャッ
プとして憾 低密度ポリエチレン、又鷹エチレン・酢酸
ビニル共重合体などでライナー処理した耐熱キャップが
知られている。Heat-resistant caps lined with synthetic resin are known, as are heat-resistant caps lined with low-density polyethylene or ethylene/vinyl acetate copolymer.
このようなライナー処理された耐熱キャップ頃飲料用液
体の保存運搬に用いられているカ＼ 飲料用液体の注入
充填時、又は、密封後に滅菌を目的とする加熱処理が行
なわれている。飲料液体の加熱処理頃 一般へ ８５℃
以上である。Such liner-treated heat-resistant caps are used to store and transport beverage liquids.Heat treatment is performed for the purpose of sterilization during injection and filling of beverage liquids or after sealing. Around the time of heat treatment of beverage liquids For general use 85℃
That's all.
また、クロージヤーの開栓トルク＋ｔ 一般に５〜１
５Ｋｇ−ａｎ、 特に６〜９ Ｋｇ−ｃｍが適当であ
る。剥離強度は４ Ｋｇｆを超えていることが必要であ
り、４Ｋｇｆ以下ではライナーが開栓時に脱落し 液洩
れにつながる可能性が考えられる。In addition, the opening torque of the closure +t is generally 5 to 1
5 Kg-cm, especially 6-9 Kg-cm is suitable. The peel strength must exceed 4 Kgf; if it is less than 4 Kgf, the liner may fall off when the bottle is opened, leading to liquid leakage.
ところで、最近では高耐熱性の合成樹脂性の壜体の成形
が可能となってきたこととも関係し 飲料用の液体をよ
り高温度域で充填できるライナー処理耐熱キャップへの
需要が高まっている。Incidentally, recently, it has become possible to mold highly heat-resistant synthetic resin bottles, and there is an increasing demand for liner-treated heat-resistant caps that can be filled with beverage liquids at higher temperatures.
ところがこのような需要の存在にもかかわらず、従来の
ライナー処理された耐熱キャップ代 仮に９０℃以上の
温度で熱処理されると熱組成変化を起こし、開栓トルク
の低下や、液洩法 クランキングなどを引き起こし キ
ャップの密封性を低下させるという問題点があった
本発明はこのような従来の技術上の問題点を解決するた
め、殊に９０℃以上の高温度にも十分耐えられる耐熱キ
ャップを提供することを技術的課題とする。However, despite the existence of such demand, if heat-resistant caps treated with conventional liners are heat-treated at temperatures of 90°C or higher, thermal composition changes, resulting in a decrease in opening torque, leakage method, and cranking. In order to solve these conventional technical problems, the present invention has developed a heat-resistant cap that can withstand high temperatures of 90°C or higher. The technical challenge is to provide
上記のような課題を解決するため、本発明の耐熱キャッ
プ１戴 ライナー材で内側をライナー処理した耐熱キャ
ップであり、そのライナー材は単独重合体と共重合体と
を主成分とする混合樹脂でなり、その単独重合体は比重
が０．９１〜０．９３の線状低密度ポリエチレンで、そ
の共重合体はａ −オレフィンとエチレンとを主な単量
体として含べ比重が０．９０４５〜０．９０５５の共重
合体（以下、 「超低密度ポリエチレン系コポリマー」
ということかある）で、混合樹脂中の単独重合体の割合
をａ、共重合体の割合をｂとし 両者間の混合比を重量
比ａ：ｂで表すと３０：７０〜８０：２０である。In order to solve the above problems, the heat-resistant cap of the present invention is a heat-resistant cap whose inner side is lined with a liner material, and the liner material is a mixed resin mainly composed of a homopolymer and a copolymer. The homopolymer is linear low-density polyethylene with a specific gravity of 0.91 to 0.93, and the copolymer contains a-olefin and ethylene as main monomers and has a specific gravity of 0.9045 to 0.9045. 0.9055 copolymer (hereinafter referred to as "ultra-low density polyethylene copolymer")
If the ratio of the homopolymer in the mixed resin is a and the ratio of the copolymer is b, the mixing ratio between the two is expressed as a weight ratio a:b, which is 30:70 to 80:20. .
以下、本発明を更に詳しく説明する。The present invention will be explained in more detail below.
本発明の耐熱キャップでは、単独重合体と共重合体とを
主成分とする混合樹脂が内側のライナー材に用いられる
。In the heat-resistant cap of the present invention, a mixed resin containing a homopolymer and a copolymer as main components is used for the inner liner material.
本発明で、共重合体と共に用いる単独重合体は線状低密
度ポリエチレンであって、この線状低密度ポリエチレン
は、通常、ＭＦＲが７．０〜８．０ｇ／ １０ｍ１ｎ、
軟化点は９３〜９０℃が一般的である。In the present invention, the homopolymer used together with the copolymer is linear low-density polyethylene, and this linear low-density polyethylene usually has an MFR of 7.0 to 8.0 g/10 m1n,
The softening point is generally 93 to 90°C.
これらはエチレンをアニオン重合あるい１戴 重縮合し
て得られる。These are obtained by anionic polymerization or monopolycondensation of ethylene.
本発明で、このような線状低密度ポリエチレンとともに
用いられる共重合体１戴 エチレンとａ−オレフィンと
を主な単量体に含む直鎖高分子で、第１表に示すような
物性を有し 例えば住友化学株式会社製として、商品名
「エフセレンＶＬ７００」で得られる。In the present invention, the copolymer used together with such linear low-density polyethylene is a linear polymer containing ethylene and a-olefin as main monomers, and has physical properties as shown in Table 1. For example, it is available from Sumitomo Chemical Co., Ltd. under the trade name "Efselen VL700".
第 １ 表
本発明の耐熱キャンプでは、単独重合体の割合をａｌ
共重合体の割合をｂとし、両者の混合比を重量比ａ：
ｂで表すと３ｏニアｏ〜８ｏ：２ｏである混合樹脂がラ
イナー処理のライナー材として用いられる。Table 1 In the heat-resistant camp of the present invention, the proportion of the homopolymer is
The proportion of the copolymer is b, and the mixing ratio of both is the weight ratio a:
A mixed resin having a ratio of 3o near o to 8o:2o, expressed as b, is used as a liner material for liner treatment.
ライナー材の混合樹脂で、単独重合体の割合ａと、共重
合体の割合すとの和１００に対ｌ−ａが３０未満の場合
には剥離強度が弱くなり、開栓時にライナー材が脱落す
るおそれが生し 耐衝撃性も弱くなる。また環境を原因
とする応力で亀裂を生じやすくなり、サーマルショック
を受けると洩れを生じたり、ストレスを受けるとクラッ
クが発生したりして好ましくない、ａが８０を超える場
合には剥離強度が弱くなり開栓時にライナーが脱落する
おそれが生じる。また、耐衝撃性が弱くなる傾向が考え
られる。In the mixed resin of the liner material, if l-a is less than 30 for the sum of the homopolymer ratio a and the copolymer ratio 100, the peel strength will be weak and the liner material will fall off when opened. There is a risk that the impact resistance will be weakened. In addition, cracks are likely to occur due to stress caused by the environment, leakage occurs when subjected to thermal shock, and cracks occur when subjected to stress, which is undesirable.If a exceeds 80, the peel strength is weak. There is a risk that the liner may fall off when the bottle is opened. In addition, there is a tendency for impact resistance to become weaker.
本発明では上記のようなライナー材でキャップ本体がラ
イナー処理される。In the present invention, the cap body is lined with the liner material as described above.
上記のような混合樹脂でなるライナー材には、そのほか
更に二酸化チタン等の白色顔料、滑斉り酸化防止斉Ｌ
熱安定剤、接着促進剤などを、本発明の目的を損なわな
い範囲で含めてあってもよい。In addition, the liner material made of the above-mentioned mixed resin also contains white pigments such as titanium dioxide, and anti-oxidation agents such as titanium dioxide.
Heat stabilizers, adhesion promoters, and the like may be included as long as they do not impair the purpose of the present invention.
このようなキャップでのライナー材の厚さは、通常、
５００μｍ〜１５００μｍがよい。The thickness of the liner material in such caps is typically
The thickness is preferably 500 μm to 1500 μm.
以下、本発明の詳細な説明する。 The present invention will be explained in detail below.
なお、本発明の実施と比較技術の実施にあたっては第２
表に■〜■で示すそれぞれの物質を用いた。In addition, in implementing the present invention and comparative technology, the second
Each of the substances indicated by ■ to ■ in the table was used.
第 ２ 表
してライナー材を調合し 第１図に示すような耐熱キャ
ップ１を各実施例ごとに１０個づつ製造した
第 ３ 表
〈実施例１〜８〉
第２表に示す物質を用い、第３表の各実施例欄に示すよ
うに混合し 更に滑剤としてエルカ酸アミド０．０３重
量服 二酸化チタン２重量部を配合なお、円内の数字は
第２表に準医 混合此種は重量比を示獣 比例配分の記
載順序はライナー材の欄の記法に準する。Table 2: A liner material was prepared according to the method shown in Table 2, and 10 heat-resistant caps 1 as shown in Figure 1 were manufactured for each example. Mix as shown in each Example column of Table 3, and further add 0.03 parts by weight of erucic acid amide and 2 parts by weight of titanium dioxide as a lubricant.The numbers in circles are as shown in Table 2. The order in which the proportional distribution is written is in accordance with the notation in the liner material column.
耐熱キャップ１の製造＆戴 次のようにした厚さ０．２
３ｍｍのアルミ板の外面にロールコートで外面コート３
と内面に内面コート４を被覆成形し 被覆成形した内面
コート上＆ミ 中心点から内径１８φｍｍのリング状に
ライナー１２を押圧してアルミ板の内面にマスキング印
刷１３を設けた次いで、マスキング印刷１３を設けたア
ルミ板でキャップ本体２をプレス成形し ナーリングに
よりキャップの口側周縁にミシン目６を開口し係止リン
グ８とキャップ本体２と力で、筒胴１０の開口側周縁の
複数の連結片７で連結するピルファープルーフ機構５を
キャップ体２に形成した溶融状態にあるライナー材料を
キャップ本体２の頂板９の内面に投入して押圧すること
により、内面コート４を介して本体２に接着固定した一
定形状のライナー１２を成形して耐熱キャップ１を製造
した
次いで、９８℃の１．５ Ｑの湯水を充填したポリエチ
レンテレフタレート樹脂製の増体の口筒１１に、上記で
製造して得られた耐熱キャップｌを被せ、１８０ｋｇ−
ｆのトッププレッシャーをかけながらロールオンキャッ
ピングマシーンでネジ部を成形し この耐熱キャップ１
を取り付けた増体を、４５秒間横転させ、次いで、５分
１５秒間正立状態として殺菌処理した その後水道水に
より水冷を行い、以下の試験を行った
■ 開栓トルク試験 （単位： Ｋｇ−Ｃｍ ）９８℃
の湯水を１．５ｆｔのポリエチレンテレフタレート樹脂
製の耐熱増体に充填し キャッピング後１箇月室温に放
置してトルクメーターにて開栓トルク値を測定した。Manufacture and installation of heat-resistant cap 1 Thickness 0.2 as follows
External coating 3 using roll coating on the external surface of a 3mm aluminum plate
The inner surface coat 4 is coated and molded on the inner surface of the aluminum plate.A masking print 13 is formed on the inner surface of the aluminum plate by pressing the liner 12 in a ring shape with an inner diameter of 18φmm from the center point. The cap body 2 is press-formed from the provided aluminum plate, and perforations 6 are opened on the periphery of the opening side of the cap by knurling, and a plurality of connecting pieces on the periphery of the opening side of the cylinder body 10 are connected by force between the locking ring 8 and the cap body 2. The pilfer-proof mechanism 5 connected by 7 is bonded to the main body 2 via the inner surface coat 4 by pouring and pressing a molten liner material formed on the cap body 2 onto the inner surface of the top plate 9 of the cap main body 2. The heat-resistant cap 1 was manufactured by molding the fixed liner 12 of a certain shape.Then, the cap 11 made of polyethylene terephthalate resin was filled with hot water of 1.5 Q at 98°C. 180kg-
Form the threaded part using a roll-on capping machine while applying top pressure of f. This heat-resistant cap 1
The increased body with the attached was turned over for 45 seconds, then held in an upright position for 5 minutes and 15 seconds for sterilization. After that, it was cooled with tap water and the following tests were conducted. Opening torque test (Unit: Kg-Cm) )98℃
A 1.5 ft heat-resistant reinforcement made of polyethylene terephthalate resin was filled with hot water and water, and after capping, the cap was left at room temperature for one month, and the opening torque value was measured using a torque meter.
■ 環境応力亀裂試験
■の測定後ライナーのクラックの有無を顕微鏡で確認し
た。■Environmental stress crack test After measuring ■, the presence or absence of cracks in the liner was confirmed using a microscope.
■ 剥離強度試験 （単位： Ｋｇｆ ）オートグラフ
を用いて１０ ｍｍ／ Ｓ、 角度９０＠でライナー
の本体からの剥離強度を測定した■ 耐ストレスクラッ
ク試験
クラック促進剤１０％イゲバール水溶液中にキャップの
側面を取り除きライナ一部がおもてになるように９０″
に曲げたものを浸漬獣 試料数の５０％にクラックが生
じる時間（Ｆｓ＠）を測定しｔユ
■ サーマルショック試験
６５℃に加熱してから４時間放置後、氷水３０分漬ける
。その後、液洩れ及び減圧度（ｍｍＨｇ）を測定した
■ 衝撃試験
密封された堰体を５０ｃｍの高さから３０’の傾斜鋼鉄
面上に逆さに落下させ、液洩れを確認した結果を第４表
に示す。■ Peel strength test (Unit: Kgf) The peel strength from the liner body was measured using an autograph at 10 mm/S at an angle of 90 @ ■ Stress crack test Remove the liner and make it 90″ so that part of the liner is on the front.
Thermal shock test: Heat to 65°C, leave for 4 hours, and then soak in ice water for 30 minutes. After that, liquid leakage and degree of reduced pressure (mmHg) were measured ■ Impact test The sealed weir was dropped upside down from a height of 50 cm onto a 30' sloped steel surface, and the results of checking for liquid leakage are shown in Table 4. Shown below.
なお、液洩れ試験、衝撃試験、環境応力亀裂試験代 １
０個の耐熱キャップｌのうち変化の認められたキャップ
の個数（単位二本）を分数で示したく以下余白〉
く比較例１〜１５〉
第２表に示す物質を用い、第５表の各比較例欄に示すよ
うに混合してライナー材を調合した他は実施例１と同様
にした
なお、比較例１４には従来からライナー材料として使用
されているＬＤＰＥ （低密度ポリエチレン）を用いた
また、比較例１５には従来からライナー材料として使
用されているＥＶＡ （エチレン・酢酸ビニル共重合体
）を用いた
〈以下余白〉
第
表
実施例１と同様に耐熱キャップ１を各比較例ごとに１０
個づつ製造上 実施例１と同様の試験を行った。In addition, liquid leak test, impact test, environmental stress crack test fee 1
Comparative Examples 1 to 15 Using the substances shown in Table 2, each of Table 5 was The procedure was the same as in Example 1 except that the liner material was prepared by mixing as shown in the Comparative Example column. In Comparative Example 14, LDPE (low density polyethylene), which has traditionally been used as a liner material, was used. In Comparative Example 15, EVA (ethylene-vinyl acetate copolymer), which has been conventionally used as a liner material, was used.
The same tests as in Example 1 were conducted for each individual product.
各試験結果を第６表に示す。The results of each test are shown in Table 6.
上記の結果から、実施例の各ライナー材料は、比較例の
いずれと比較しても、その全てが開栓トルク試験、環境
応力亀裂試験、剥離強度試験、耐ストレスクラック試験
、サーマルショック試験、衝撃試験において適正な値を
維持し 耐熱性を発揮することが分かった
すなわち、実施例で得られた耐熱キャップ１は開栓トル
クの低下、液洩れを防止するだけでなく、キャンピング
時にかかる圧力及び高温充填による蒸気及び温水接触の
環境下でのストレスクラッキングの発生を有効に防止し
従来の開発ライナー材料の密封性を更に向上させるこ
とが分かった〔発明の効果〕
本発明ＩＬ 上記のような構成でなるため、殊に９０
’Ｃ以上の高温にも十分耐えられる耐熱キャップを得る
ことができる。From the above results, each of the liner materials of the Examples, when compared with any of the Comparative Examples, all performed well in the opening torque test, environmental stress crack test, peel strength test, stress crack resistance test, thermal shock test, and impact test. In the test, it was found that the heat resistant cap 1 maintains appropriate values and exhibits heat resistance.In other words, the heat resistant cap 1 obtained in Example not only prevents a decrease in opening torque and leakage, but also can withstand the pressure and high temperatures applied during camping. It was found that the occurrence of stress cracking in an environment of contact with steam and hot water due to filling was effectively prevented, and the sealing performance of the conventionally developed liner material was further improved. [Effects of the Invention] Invention IL With the above configuration. In particular, 90
It is possible to obtain a heat-resistant cap that can sufficiently withstand high temperatures of 'C or higher.
また、９０℃以上で熱処理することが必要な内容液の密
封が可能になったために高性能を有するポリエチレンテ
レフタレート樹脂性の２軸延伸ブロ一成形壜体の使用分
野を拡大することができる。Furthermore, since it has become possible to seal the content liquid which requires heat treatment at 90° C. or higher, the field of use of the biaxially stretched blow-molded bottle made of polyethylene terephthalate resin, which has high performance, can be expanded.
第１図は本発明の耐熱キャップの実施例を示す一部断面
図である。
１・・耐熱キャップ
特許出願出願人
株式会社FIG. 1 is a partial sectional view showing an embodiment of the heat-resistant cap of the present invention. 1.Heat-resistant cap patent applicant Co., Ltd.
Claims (1)
プであり、 そのライナー材は単独重合体と共重合体とを主成分とす
る混合樹脂でなり、 その単独重合体は比重が０．９１〜０．９３の線状低密
度ポリエチレンで、その共重合体はα−オレフィンとエ
チレンとを主な単量体として含み、比重が０．９０４５
〜０．９０５５の共重合体で、混合樹脂中の単独重合体
の割合をａ、共重合体の割合をｂとし、両者間の混合比
を重量比ａ：ｂで表すと３０：７０〜８０：２０である
耐熱キャップ。(1) It is a heat-resistant cap whose inside is lined with a liner material, and the liner material is a mixed resin whose main components are a homopolymer and a copolymer, and the homopolymer has a specific gravity of 0.91 to 0. .93 linear low density polyethylene, the copolymer contains α-olefin and ethylene as main monomers, and has a specific gravity of 0.9045.
~0.9055 copolymer, where the ratio of the homopolymer in the mixed resin is a and the ratio of the copolymer is b, and the mixing ratio between the two is expressed as a weight ratio a:b of 30:70 to 80. :20 heat resistant cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2142161A JP2914723B2 (en) | 1990-03-26 | 1990-05-31 | Heat resistant cap |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3079890 | 1990-03-26 | ||
| JP2-30798 | 1990-03-26 | ||
| JP2142161A JP2914723B2 (en) | 1990-03-26 | 1990-05-31 | Heat resistant cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03289453A true JPH03289453A (en) | 1991-12-19 |
| JP2914723B2 JP2914723B2 (en) | 1999-07-05 |
Family
ID=26369210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2142161A Expired - Fee Related JP2914723B2 (en) | 1990-03-26 | 1990-05-31 | Heat resistant cap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2914723B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995005427A1 (en) * | 1993-08-18 | 1995-02-23 | The Dow Chemical Company | Gaskets made from homogeneous linear olefin polymers |
| WO1995005426A1 (en) * | 1993-08-18 | 1995-02-23 | The Dow Chemical Company | Gaskets made from elastic substantially linear olefin polymers |
| WO1996020878A1 (en) * | 1994-12-29 | 1996-07-11 | Alcoa Closure Systems International, Inc. | A substantially linear polyethylene sealing liner for a closure |
| JP2009249404A (en) * | 2008-04-01 | 2009-10-29 | Toyo Seikan Kaisha Ltd | Molded article excellent in stress crack-proof property and slipping property at low temperature |
-
1990
- 1990-05-31 JP JP2142161A patent/JP2914723B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995005427A1 (en) * | 1993-08-18 | 1995-02-23 | The Dow Chemical Company | Gaskets made from homogeneous linear olefin polymers |
| WO1995005426A1 (en) * | 1993-08-18 | 1995-02-23 | The Dow Chemical Company | Gaskets made from elastic substantially linear olefin polymers |
| WO1996020878A1 (en) * | 1994-12-29 | 1996-07-11 | Alcoa Closure Systems International, Inc. | A substantially linear polyethylene sealing liner for a closure |
| JP2009249404A (en) * | 2008-04-01 | 2009-10-29 | Toyo Seikan Kaisha Ltd | Molded article excellent in stress crack-proof property and slipping property at low temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2914723B2 (en) | 1999-07-05 |
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