JP2000002392A - End part sealing cap for tubular object or valve - Google Patents

End part sealing cap for tubular object or valve

Info

Publication number
JP2000002392A
JP2000002392A JP18687098A JP18687098A JP2000002392A JP 2000002392 A JP2000002392 A JP 2000002392A JP 18687098 A JP18687098 A JP 18687098A JP 18687098 A JP18687098 A JP 18687098A JP 2000002392 A JP2000002392 A JP 2000002392A
Authority
JP
Japan
Prior art keywords
cap
tubular object
sealing cap
valve
sealing
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.)
Pending
Application number
JP18687098A
Other languages
Japanese (ja)
Inventor
Masato Taniguchi
正人 谷口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP18687098A priority Critical patent/JP2000002392A/en
Publication of JP2000002392A publication Critical patent/JP2000002392A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D39/00Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/04Cup-shaped plugs or like hollow flanged members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D65/00Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38Packaging materials of special type or form
    • B65D65/46Applications of disintegrable, dissolvable or edible materials
    • B65D65/466Bio- or photodegradable packaging materials
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

PROBLEM TO BE SOLVED: To decompose a cap by microorganisms after use so as to solve waste disposal problems after installation of a tubular object or a valve by using biodegradable fatty acid polyester as a material for a cap. SOLUTION: A sealing cap 1 is used suitably for sealing a tubular object used for carrying liquid/gas, a valve connected to the tubular object, or a tubular object used for installation of an electric wire. The sealing cap 1 for a tubular object/valve is formed of biodegradable fatty acid polyester or its blend. As the fatty acid polyester, polylactic acid is suitable because it is excellent in biodegradability, corrosion resistance and biosafety, decomposed into lactic acid absorbable in an organism, produced at low cost, and provided with transparence and a good coloring characteristic. Therefore, the sealing cap 1 can be completely decomposed into water and carbon dioxide by microorganisms in soil or fertilizer when it is formed of fatty acid polyester.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、生分解性脂肪族ポ
リエステルからなる、管状物及びバルブの端部封止用キ
ャップに関する。特に、液体、気体等の移送用に使用さ
れる管状物やそれに接続されるバルブ、電気配線の設置
用に使用される管状物の異物混入防止のための端部封止
用キャップに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap made of a biodegradable aliphatic polyester for sealing a tubular member and a valve end. In particular, the present invention relates to a tubular member used for transferring a liquid, a gas or the like, a valve connected to the tubular member, and an end sealing cap for preventing foreign matter from entering a tubular member used for installing electric wiring.

【0002】[0002]

【従来の技術】上水管、下水管、ガス管、電気配管等の
各種パイプやバルブを、家庭や公共工事において設置す
るに当たり、パイプやバルブの両端部は、異物混入を防
止するためにキャップで封止される。
2. Description of the Related Art When installing various pipes and valves such as water pipes, sewage pipes, gas pipes, and electric pipes in home and public works, both ends of the pipes and valves are provided with caps to prevent foreign substances from entering. Sealed.

【0003】従来、管状物やバルブの端部封止用キャッ
プとしては、各種形状のポリエチレン製のものが用いら
れていた。ところが、これら管状物やバルブを設置完了
した後は、端部封止用キャップは不要となり、大量の産
業廃棄物となっていた。そして、その相当多くのものが
放置されており、これらの処理は深刻な問題である。
Heretofore, various shapes of polyethylene have been used as caps for sealing end portions of tubular articles and valves. However, after the installation of these tubular objects and valves has been completed, the end sealing cap is no longer necessary, resulting in a large amount of industrial waste. And a considerable number of them are neglected, and these processes are serious problems.

【0004】[0004]

【発明が解決しようとする課題】そこで、本発明の目的
は、上記の実情に鑑み、管状物やバルブの設置完了後の
廃棄物処理の問題が解決される管状物又はバルブの端部
封止用キャップを提供することにある。
SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to seal the end of a tubular article or valve which solves the problem of waste disposal after the installation of the tubular article or valve. To provide a cap for use.

【0005】[0005]

【課題を解決するための手段】本発明者は鋭意検討した
結果、生分解性を有する脂肪族ポリエステルをキャップ
の材料として用いることにより、上記問題が解決できる
ことを見出だし、本発明を完成するに至った。
As a result of intensive studies, the present inventor has found that the above problem can be solved by using a biodegradable aliphatic polyester as a material for the cap, and has accomplished the present invention. Reached.

【0006】すなわち、本発明は、生分解性を有する脂
肪族ポリエステル又はそのブレンド品からなる、管状物
又はバルブの端部封止用キャップである。本発明におい
て、生分解性脂肪族ポリエステルがポリ乳酸であること
が好ましい。また、本発明において、生分解性脂肪族ポ
リエステルがポリブチレンサクシネートアジペートであ
ることも好ましい。
That is, the present invention is a cap for sealing the end of a tubular article or a valve, comprising a biodegradable aliphatic polyester or a blend thereof. In the present invention, the biodegradable aliphatic polyester is preferably polylactic acid. In the present invention, it is also preferable that the biodegradable aliphatic polyester is polybutylene succinate adipate.

【0007】本発明の封止用キャップは、液体又は気体
の移送用に使用される管状物(パイプ)、それに接続さ
れるバルブ、又は電気配線の設置用に使用される管状物
の端部封止用として、好適に用いられる。
[0007] The sealing cap of the present invention is an end sealing of a tubular material (pipe) used for transferring liquid or gas, a valve connected thereto, or a tubular material used for installing electric wiring. It is preferably used for stopping.

【0008】本発明の封止用キャップは、生分解性を有
する脂肪族ポリエステル又はそのブレンド品からなるの
で、使用後には、土中もしくは堆肥中において微生物に
よって分解される。従って、従来のポリエチレン製キャ
ップのような廃棄物処理の問題が軽減される。
[0008] Since the sealing cap of the present invention is made of a biodegradable aliphatic polyester or a blend thereof, it is decomposed by microorganisms in soil or compost after use. Thus, waste disposal problems such as conventional polyethylene caps are reduced.

【0009】以下、本発明について詳しく説明する。本
発明の封止用キャップを構成する生分解性脂肪族ポリエ
ステルには、例えば、ポリグリコール酸、ポリ乳酸等の
ポリ(α−ヒドロキシ酸); ポリ−β−ヒドロキシ酪
酸等のポリ(β−ヒドロキシアルカノエート); ポリ
−ε−カプロラクトン等のポリ(ω−ヒドロキシアルカ
ノエート); ポリブチレンサクシネート、ポリブチレ
ンサクシネートアジペート、ポリエチレンサクシネート
等のポリアルキレンアルカノエート; ポリエステルカ
ーボネート、ポリビニルアルコール等が含まれる。これ
ら脂肪族ポリエステルは、ホモポリマー、コポリマーの
いずれであってもよい。これら脂肪族ポリエステルの重
量平均分子量は、例えば、10〜30万程度である。
Hereinafter, the present invention will be described in detail. Examples of the biodegradable aliphatic polyester constituting the sealing cap of the present invention include poly (α-hydroxy acid) such as polyglycolic acid and polylactic acid; and poly (β-hydroxy acid such as poly-β-hydroxybutyric acid. Poly (ω-hydroxyalkanoate) such as poly-ε-caprolactone; polyalkylene alkanoate such as polybutylene succinate, polybutylene succinate adipate, polyethylene succinate; and polyester carbonate, polyvinyl alcohol and the like. . These aliphatic polyesters may be either homopolymers or copolymers. The weight average molecular weight of these aliphatic polyesters is, for example, about 100,000 to 300,000.

【0010】本発明において、上記脂肪族ポリエステル
のうち、ポリ乳酸が、生分解特性に優れ、耐食性に優
れ、生体安全性が高く、しかも分解物である乳酸が生体
内で吸収される点、価格が安価である点、透明である
点、着色性が良い点等で好ましい。
In the present invention, among the above aliphatic polyesters, polylactic acid is excellent in biodegradation characteristics, excellent in corrosion resistance, high in biosafety, and the decomposition product of lactic acid is absorbed in the living body. Is preferred in that it is inexpensive, transparent, and has good coloring properties.

【0011】また、ポリブチレンサクシネート、ポリブ
チレンサクシネートアジペート、ポリエチレンサクシネ
ート等のポリアルキレンアルカノエートは、酵素分解性
であるが、本発明においてポリ乳酸と同様に好適であ
る。ポリブチレンサクシネートアジペートが好ましい。
Polyalkylene alkanoates such as polybutylene succinate, polybutylene succinate adipate and polyethylene succinate are enzymatically decomposable, but are suitable in the present invention in the same manner as polylactic acid. Polybutylene succinate adipate is preferred.

【0012】また、本発明の封止用キャップは、上記脂
肪族ポリエステル同士のブレンド品から構成されてもよ
い。あるいは、上記脂肪族ポリエステルと、でん粉等の
有機物とのブレンド品から構成されてもよい。
The sealing cap of the present invention may be composed of a blend of the above-mentioned aliphatic polyesters. Alternatively, it may be composed of a blend of the aliphatic polyester and an organic substance such as starch.

【0013】本発明の封止用キャップ材料として好まし
いポリ乳酸について、より詳しく説明する。ポリ乳酸は
生分解特性に優れ、土中もしくは堆肥中において微生物
によって分解され、水と炭酸ガスに完全に分解される。
例えば、ポリL乳酸の生分解特性は、コンポスト中の4
4日間の生分解性テストで、93%の分解性を示し非常
に優れている。
The polylactic acid preferred as the sealing cap material of the present invention will be described in more detail. Polylactic acid has excellent biodegradation properties, is decomposed by microorganisms in soil or compost, and is completely decomposed into water and carbon dioxide.
For example, the biodegradation properties of poly-L-lactic acid are 4% in compost.
Excellent biodegradability test with 93% degradability in 4 days.

【0014】本発明の封止用キャップ材料としてのポリ
乳酸は、特に限定されないが、例えば、その重量平均分
子量が15〜25万であることが好ましい。重量平均分
子量が25万を超えると、成形性が悪くなり易い。
The polylactic acid as the sealing cap material of the present invention is not particularly limited, but, for example, preferably has a weight average molecular weight of 150,000 to 250,000. If the weight average molecular weight exceeds 250,000, the moldability tends to deteriorate.

【0015】また、ポリ乳酸におけるL乳酸単位、D乳
酸単位の比率はどのようなものであってもよい。通常
は、ポリDL乳酸におけるD乳酸単位の構成含量は、多
くとも40モル%までが好ましい。D乳酸単位が40モ
ル%を超えると、重合されたポリDL乳酸の分子量が低
く(1万以下)なってしまう。本発明で用いられる好ま
しいポリ乳酸は、ポリL乳酸、または20モル%までの
D乳酸を構成単位として含むポリDL乳酸である。
The ratio of L-lactic acid units to D-lactic acid units in polylactic acid may be any. Usually, the constituent content of the D-lactic acid unit in the poly-DL-lactic acid is preferably at most 40 mol%. If the D lactic acid unit exceeds 40 mol%, the molecular weight of the polymerized poly DL lactic acid will be low (10,000 or less). The preferred polylactic acid used in the present invention is poly-L-lactic acid or poly-DL-lactic acid containing as a constituent unit up to 20 mol% of D-lactic acid.

【0016】また、ポリ乳酸は、乳酸モノマー又はラク
チドと共重合可能な他の成分が共重合された乳酸コポリ
マーであっても良い。このような他の成分としては、2
個以上のエステル結合形成性の官能基を持つジカルボン
酸、多価アルコール、ヒドロキシカルボン酸、ラクトン
等が挙げられる。
The polylactic acid may be a lactic acid copolymer obtained by copolymerizing a lactic acid monomer or another component copolymerizable with lactide. Such other components include 2
Examples thereof include dicarboxylic acids, polyhydric alcohols, hydroxycarboxylic acids, and lactones having at least two functional groups capable of forming an ester bond.

【0017】ジカルボン酸としては、コハク酸、アゼラ
イン酸、セバシン酸、テレフタル酸、イソフタル酸等が
挙げられる。
Examples of the dicarboxylic acid include succinic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid and the like.

【0018】多価アルコールとしては、ビスフェノール
にエチレンオキシドを付加反応させたものなどの芳香族
多価アルコール、エチレングリコール、プロピレングリ
コール、ブタンジオール、ヘキサンジオール、オクタン
ジオール、グリセリン、ソルビタン、トリメチロールプ
ロパン、ネオペンチルグリコールなどの脂肪族多価アル
コール、ジエチレングリコール、トリエチレングリコー
ル、ポリエチレングリコール、ポリプロピレングリコー
ルなどのエーテルグリコール等が挙げられる。
Examples of the polyhydric alcohol include aromatic polyhydric alcohols such as those obtained by adding ethylene oxide to bisphenol, ethylene glycol, propylene glycol, butanediol, hexanediol, octanediol, glycerin, sorbitan, trimethylolpropane, neomethylol Examples include aliphatic polyhydric alcohols such as pentyl glycol and ether glycols such as diethylene glycol, triethylene glycol, polyethylene glycol and polypropylene glycol.

【0019】ヒドロキシカルボン酸としては、グリコー
ル酸、ヒドロキシブチルカルボン酸、その他特開平6−
184417号公報に記載されているもの等が挙げられ
る。
Examples of the hydroxycarboxylic acid include glycolic acid, hydroxybutyl carboxylic acid, and the like.
And the like described in JP-A-184417.

【0020】ラクトンとしては、グリコリド、ε−カプ
ロラクトングリコリド、ε−カプロラクトン、β−プロ
ピオラクトン、δ−ブチロラクトン、β−またはγ−ブ
チロラクトン、ピバロラクトン、δ−バレロラクトン等
が挙げられる。
Examples of the lactone include glycolide, ε-caprolactone glycolide, ε-caprolactone, β-propiolactone, δ-butyrolactone, β- or γ-butyrolactone, pivalolactone, δ-valerolactone and the like.

【0021】ポリ乳酸は従来公知の方法で合成すること
ができる。すなわち、特開平7−33861号公報、特
開昭59−96123号公報、高分子討論会予稿集44
巻、3198-3199 頁に記載のような乳酸からの直接脱水縮
合、または乳酸環状二量体ラクチドの開環重合によって
合成することができる。
Polylactic acid can be synthesized by a conventionally known method. That is, Japanese Unexamined Patent Publication No. 7-33861, Japanese Unexamined Patent Publication No. Sho 59-96123, and Preliminary proceedings of Polymer Symposium 44
Vol. 3, pp. 3198-3199, can be synthesized by direct dehydration condensation from lactic acid, or ring-opening polymerization of lactic acid cyclic dimer lactide.

【0022】本発明においては、生分解性脂肪族ポリエ
ステルに、必要に応じて、可塑剤(フタル酸エステル
等)、安定剤(ステアリン酸カルシウム等)、着色剤
(赤口黄鉛、酸化チタン等)、充填剤(炭酸カルシウ
ム、クレー、タルク等)、酸化防止剤(アルキルフェノ
ール、有機亜リン酸エステル等)、紫外線吸収剤(サリ
チル酸エステル、ベンゾトリアゾール等)、難燃剤(リ
ン酸エステル、酸化アンチモン等)、帯電防止剤、抗菌
剤等の従来公知の各種添加剤を配合することができる。
これらの配合量は適宜定めることができる。
In the present invention, a plasticizer (such as a phthalate ester), a stabilizer (such as calcium stearate), a coloring agent (such as red-mouthed lead, titanium oxide, etc.) may be added to the biodegradable aliphatic polyester, if necessary. Fillers (calcium carbonate, clay, talc, etc.), antioxidants (alkylphenols, organic phosphites, etc.), ultraviolet absorbers (salicylates, benzotriazoles, etc.), flame retardants (phosphates, antimony oxide, etc.), Various conventionally known additives such as an antistatic agent and an antibacterial agent can be blended.
The amounts of these components can be determined as appropriate.

【0023】脂肪族ポリエステルに、上記各種添加剤を
配合する方法は、特に制限されるものではなく、従来公
知の方法によって行うことができる。例えば、ミルロー
ル、バンバリーミキサー、スーパーミキサー、単軸ある
いは二軸押出機等を用いて混合混練すれば良い。
The method of blending the above-mentioned various additives with the aliphatic polyester is not particularly limited, and can be carried out by a conventionally known method. For example, mixing and kneading may be performed using a mill roll, a Banbury mixer, a super mixer, a single-screw or twin-screw extruder, or the like.

【0024】本発明の封止用キャップは、上記脂肪族ポ
リエステルを、常法により所望の形状の金型に射出成形
することによって製造することができる。本発明の封止
用キャップは、液体又は気体の移送用に使用される管状
物、それに接続されるバルブ、又は電気配線の設置用に
使用される管状物の端部封止用として、好適に用いられ
る。このような対象となる管状物やバルブの直径は、例
えば、10mmから3000mm程度までである。
The sealing cap of the present invention can be manufactured by injection molding the above aliphatic polyester into a mold having a desired shape by a conventional method. The sealing cap of the present invention is preferably used for sealing an end of a tubular article used for transferring a liquid or gas, a valve connected thereto, or a tubular article used for installation of electric wiring. Used. The diameter of such a tubular object or valve is, for example, about 10 mm to about 3000 mm.

【0025】[0025]

【実施例】以下、実施例により本発明をさらに具体的に
説明する。 [実施例1]耐震管NS用の差し口用100mmφの封
止用キャップ(図1)を作成した。すなわち、図1は、
本発明による封止用キャップの一例の縦断面図である。
キャップ(1) は、100mmφ耐震管NSの差し口に固
定されるように、リブ(2) 及び(3) が周方向にそれぞれ
3か所形成されている。
The present invention will be described more specifically with reference to the following examples. Example 1 A 100 mmφ sealing cap (FIG. 1) for an inlet for an earthquake-resistant tube NS was prepared. That is, FIG.
It is a longitudinal section of an example of a cap for closure by the present invention.
The cap (1) is formed with three ribs (2) and (3) in the circumferential direction so as to be fixed to the entrance of the 100 mmφ seismic tube NS.

【0026】重量平均分子量18万、融点178℃、ガ
ラス転移点58℃のポリL乳酸樹脂のチップを用いた。
このチップを所望形状の金型に射出成形し、図1に示す
封止用キャップを製造した。
A poly-L-lactic acid resin chip having a weight average molecular weight of 180,000, a melting point of 178 ° C. and a glass transition point of 58 ° C. was used.
This chip was injection-molded into a mold having a desired shape to produce a sealing cap shown in FIG.

【0027】このキャップは、耐震管NSの設置工事完
了後には不要となるが、ポリL乳酸製であるので、自然
環境中に放置されても経時により水と炭酸ガスに完全に
分解される。廃棄物処理の問題が解決される。
This cap becomes unnecessary after the installation of the earthquake-resistant tube NS is completed, but since it is made of poly-L-lactic acid, it is completely decomposed into water and carbon dioxide over time even if it is left in a natural environment. The problem of waste disposal is solved.

【0028】[実施例2]実施例1と同じポリL乳酸樹
脂チップを所望形状の金型に射出成形し、耐震管NS用
の受け口用100mmφの封止用キャップを製造した。
Example 2 The same poly-L-lactic acid resin chip as in Example 1 was injection-molded into a mold having a desired shape to produce a 100 mmφ sealing cap for a receptacle for an earthquake-resistant tube NS.

【発明の効果】本発明の管状物及びバルブの端部封止用
キャップによれば、生分解性脂肪族ポリエステルを構成
材料としており、使用後の廃棄処理が容易であり、環境
に悪影響がない。また、本発明の封止用キャップは、従
来の汎用ポリマー製のキャップと同様に簡単に製造する
ことができる。
According to the tubular article and the cap for sealing the end of the valve of the present invention, the biodegradable aliphatic polyester is used as a constituent material, the disposal after use is easy, and the environment is not adversely affected. . Further, the sealing cap of the present invention can be easily manufactured in the same manner as a conventional general-purpose polymer cap.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の封止用キャップの一例を示す縦断面
図である。
FIG. 1 is a longitudinal sectional view showing an example of a sealing cap of the present invention.

【符号の説明】[Explanation of symbols]

(1) :キャップ (2) :リブ (3) :リブ (1): Cap (2): Rib (3): Rib

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 4J002 BE021 CF031 CF051 CF181 CF191 CG041 FD010 FD020 FD030 FD050 FD070 FD090 FD130 GJ00 GJ02 4J029 AA02 AA03 AA08 AB07 AC01 AC02 AD01 AD10 AE18 BA02 BA03 BA04 BA05 BA10 BF09 BF18 BF25 CA02 CA04 CA06 CB05A CB06A EA02 EA03 EA05 EG02 EG03 EG04 EG05 EG07 EG09 EH02 FC03 FC05 HA01 HB01 JE182 KH08 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 4J002 BE021 CF031 CF051 CF181 CF191 CG041 FD010 FD020 FD030 FD050 FD070 FD090 FD130 GJ00 GJ02 4J029 AA02 AA03 AA08 AB07 AC01 AC02 AD01 AD10 AE18 BA02 BA03 CA04 CB05 CA05 BF03 CB06A EA02 EA03 EA05 EG02 EG03 EG04 EG05 EG07 EG09 EH02 FC03 FC05 HA01 HB01 JE182 KH08

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 生分解性を有する脂肪族ポリエステル又
はそのブレンド品からなる、管状物又はバルブの端部封
止用キャップ。
1. A cap for sealing an end of a tubular article or a valve, comprising a biodegradable aliphatic polyester or a blend thereof.
【請求項2】 生分解性脂肪族ポリエステルがポリ乳酸
である、請求項1に記載の封止用キャップ。
2. The sealing cap according to claim 1, wherein the biodegradable aliphatic polyester is polylactic acid.
【請求項3】 生分解性脂肪族ポリエステルがポリブチ
レンサクシネートアジペートである、請求項1に記載の
封止用キャップ。
3. The sealing cap according to claim 1, wherein the biodegradable aliphatic polyester is polybutylene succinate adipate.
【請求項4】 請求項1〜3項のうちのいずれか1項に
記載の、液体又は気体の移送用に使用される管状物、そ
れに接続されるバルブ、又は電気配線の設置用に使用さ
れる管状物の端部封止用キャップ。
4. A tube according to claim 1, which is used for transferring a liquid or gas, a valve connected thereto, or used for installing electric wiring. For sealing the end of a tubular article.
JP18687098A 1998-06-17 1998-06-17 End part sealing cap for tubular object or valve Pending JP2000002392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18687098A JP2000002392A (en) 1998-06-17 1998-06-17 End part sealing cap for tubular object or valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18687098A JP2000002392A (en) 1998-06-17 1998-06-17 End part sealing cap for tubular object or valve

Publications (1)

Publication Number Publication Date
JP2000002392A true JP2000002392A (en) 2000-01-07

Family

ID=16196122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18687098A Pending JP2000002392A (en) 1998-06-17 1998-06-17 End part sealing cap for tubular object or valve

Country Status (1)

Country Link
JP (1) JP2000002392A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054924A1 (en) * 2002-12-13 2004-07-01 Canon Kabushiki Kaisha Columnar structured material, electrode having columnar structured material, and production method therefor
JP2007100869A (en) * 2005-10-05 2007-04-19 Sekisui Chem Co Ltd Joint protecting cap
EP1818273A1 (en) * 2004-10-29 2007-08-15 Mikasa Industry Co., Ltd. Hinge cap having biodegradabilty
JP2011122604A (en) * 2009-12-08 2011-06-23 Aron Kasei Co Ltd Pipe body for ground burial, and method for covering pipe end opening in the pipe body
JP2014069845A (en) * 2012-09-28 2014-04-21 Sekisui Chem Co Ltd Mounting structure of pipe end cap
KR20230102867A (en) * 2021-12-30 2023-07-07 한국지역난방공사 Inserting device of water proof plate
KR20230102865A (en) * 2021-12-30 2023-07-07 한국지역난방공사 Water Proof Plate

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054924A1 (en) * 2002-12-13 2004-07-01 Canon Kabushiki Kaisha Columnar structured material, electrode having columnar structured material, and production method therefor
EP1818273A1 (en) * 2004-10-29 2007-08-15 Mikasa Industry Co., Ltd. Hinge cap having biodegradabilty
EP1818273A4 (en) * 2004-10-29 2009-04-29 Mikasa Industry Co Ltd Hinge cap having biodegradabilty
JP2007100869A (en) * 2005-10-05 2007-04-19 Sekisui Chem Co Ltd Joint protecting cap
JP4676858B2 (en) * 2005-10-05 2011-04-27 積水化学工業株式会社 Fitting protective cap
JP2011122604A (en) * 2009-12-08 2011-06-23 Aron Kasei Co Ltd Pipe body for ground burial, and method for covering pipe end opening in the pipe body
JP2014069845A (en) * 2012-09-28 2014-04-21 Sekisui Chem Co Ltd Mounting structure of pipe end cap
KR20230102867A (en) * 2021-12-30 2023-07-07 한국지역난방공사 Inserting device of water proof plate
KR20230102865A (en) * 2021-12-30 2023-07-07 한국지역난방공사 Water Proof Plate
KR102669099B1 (en) * 2021-12-30 2024-05-27 한국지역난방공사 Inserting device of water proof plate
KR102669098B1 (en) * 2021-12-30 2024-05-27 한국지역난방공사 Water Proof Plate

Similar Documents

Publication Publication Date Title
US8048502B2 (en) Readily degradable resin composition and biodegradable container using the same
CA2917356A1 (en) Heat resistant polylactic acid
JP2022512805A (en) Reinforced biodegradable composite material
JP2000002392A (en) End part sealing cap for tubular object or valve
JP4034596B2 (en) Injection molded body
JP3984440B2 (en) Resin composition, film and disposal method
JP2004269720A (en) Thermoplastic resin composition
US10633522B1 (en) Renewable resin composition and product prepared from the same
JP4205404B2 (en) Polylactic acid resin composition, molded article, and plasticizer for polyester resin
JP3773335B2 (en) Biodegradable aliphatic polyester resin-starch composition
JP5213294B2 (en) Polyglycolic acid resin composition
JP4281860B2 (en) Polylactic acid resin composition, molded article and plasticizer for resin
JP3235968B2 (en) Three-component biodegradable resin composition
JP4693254B2 (en) Glycolic acid resin composition
JP3620304B2 (en) Copolymer of lactic acid polymer and method for producing the same
JP4205403B2 (en) Polylactic acid resin composition, molded article, and plasticizer for polyester resin
JP4758053B2 (en) Composition of glycolic acid polymer and processed product thereof
JP2002348451A (en) Poly(lactic acid) resin composition
KR0156895B1 (en) Biodegradable resin composition
KR0146231B1 (en) Biodegradable resin composition
JP3546593B2 (en) Biodegradable lactic acid-based polymer composition
JP3934935B2 (en) Glycolic acid resin composition
JP4758052B2 (en) Glycolic acid polymer composition and processed product thereof
JPH07228074A (en) Decomposable resin molding
JP3680233B2 (en) Biodegradable lactic acid copolymer composition

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20051101

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20051115

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20060314