JPH0699586B2 - Thermoplastic resin molding for radiation sterilization - Google Patents
Thermoplastic resin molding for radiation sterilizationInfo
- Publication number
- JPH0699586B2 JPH0699586B2 JP61178943A JP17894386A JPH0699586B2 JP H0699586 B2 JPH0699586 B2 JP H0699586B2 JP 61178943 A JP61178943 A JP 61178943A JP 17894386 A JP17894386 A JP 17894386A JP H0699586 B2 JPH0699586 B2 JP H0699586B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- film
- weight
- hydrotalcite
- radiation sterilization
- 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.)
- Expired - Lifetime
Links
- 229920005992 thermoplastic resin Polymers 0.000 title claims description 26
- 230000005855 radiation Effects 0.000 title claims description 17
- 230000001954 sterilising effect Effects 0.000 title claims description 11
- 238000004659 sterilization and disinfection Methods 0.000 title claims description 10
- 238000000465 moulding Methods 0.000 title description 2
- 239000011342 resin composition Substances 0.000 claims description 11
- 230000000052 comparative effect Effects 0.000 description 16
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 14
- 229960001545 hydrotalcite Drugs 0.000 description 14
- 229910001701 hydrotalcite Inorganic materials 0.000 description 14
- 238000000034 method Methods 0.000 description 11
- 239000000499 gel Substances 0.000 description 8
- -1 polyethylene Polymers 0.000 description 8
- 239000004743 Polypropylene Substances 0.000 description 6
- 235000013305 food Nutrition 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 229920001684 low density polyethylene Polymers 0.000 description 5
- 239000004702 low-density polyethylene Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000005022 packaging material Substances 0.000 description 5
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- 229920005672 polyolefin resin Polymers 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical compound [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005251 gamma ray Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 229910001853 inorganic hydroxide Inorganic materials 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 229920000742 Cotton Polymers 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
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は熱可塑性樹脂組成物から成形した放射線滅菌用
熱可塑性樹脂成形品、特に食品、医療用品を密封包装
し、放射線滅菌するために用いる放射線滅菌用熱可塑性
樹脂成形品に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for radiation sterilization of a thermoplastic resin molded article for radiation sterilization molded from a thermoplastic resin composition, in particular foods and medical supplies in a hermetically sealed package. The present invention relates to a thermoplastic resin molded product for radiation sterilization.
一般に、食品用包装材料や医療用品用包装材料として、
熱可塑性樹脂、特に易ヒートシール性及び成形性の観点
からポリオレフィン系樹脂が頻繁に用いられている。Generally, as packaging material for food and packaging material for medical supplies,
Thermoplastic resins, particularly polyolefin resins, are frequently used from the viewpoint of easy heat sealability and moldability.
ところで、食品用包装材料や医療用品用包装材料は包装
内容物の滅菌の目的で放射線照射を受けるが、ポリオレ
フィン系樹脂は放射線照射を受けると、自動酸化劣化に
よって激しい異臭が発生するという問題がある。例え
ば、通常のポリエチレンではガンマ線照射によってカル
ボン酸等の酸類、ケトン類、アルコール類などが発生す
るし、架橋型のポリエチレンでも2.5〜3Mradの低線量域
で分解及び架橋の両反応が起こり、異臭の原因となって
いる。By the way, packaging materials for foods and packaging materials for medical supplies are irradiated with radiation for the purpose of sterilizing package contents, but polyolefin resins have a problem that when they are irradiated with radiation, a severe odor is generated due to auto-oxidative deterioration. . For example, in ordinary polyethylene, acids such as carboxylic acids, ketones, alcohols, etc. are generated by gamma ray irradiation, and even cross-linked polyethylene undergoes both decomposition and cross-linking reactions in the low dose range of 2.5 to 3 Mrad, resulting in off-flavor. It is the cause.
このような照射臭を防止する方法としては、特開昭60-1
81147号公報にみられるように、水酸化カルシウムのよ
うな無機水酸化物をポリオレフィン系樹脂に混入する方
法が知られている。しかし、この方法では無機水酸化物
に起因して成形フィルムにゲルやフィシュアイが多発
し、またフィルムが白濁して透明性が著しく損なわれる
という欠点がある。As a method for preventing such an irradiation odor, Japanese Patent Laid-Open No. 60-1
As disclosed in Japanese Patent No. 81147, there is known a method of mixing an inorganic hydroxide such as calcium hydroxide into a polyolefin resin. However, this method has the drawback that gels and fisheyes frequently occur in the molded film due to the inorganic hydroxide, and the film becomes cloudy and the transparency is significantly impaired.
また、特開昭60-176659号公報には包装袋内にガス吸着
剤を封入する方法が開示されているが、この方法では照
射臭の吸着が十分でなく、しかもガス吸着剤が高価であ
るため、工業的にも商業的にも実用性に欠けるという問
題点がある。Further, Japanese Patent Laid-Open No. 60-176659 discloses a method of enclosing a gas adsorbent in a packaging bag, but this method does not sufficiently adsorb irradiation odor, and the gas adsorbent is expensive. Therefore, there is a problem that it is lacking in practicality both industrially and commercially.
本発明は上記のような従来技術の欠点を解消するために
なされたものであり、本発明の目的は、放射線照射によ
る異臭の発生を確実に防止でき、成形品の外観に優れ、
しかも安価に得られる放射線滅菌用熱可塑性樹脂成形品
を提供することにある。The present invention has been made in order to eliminate the drawbacks of the prior art as described above, the object of the present invention, it is possible to reliably prevent the generation of offensive odor due to radiation irradiation, excellent appearance of the molded article,
Moreover, it is to provide a thermoplastic resin molded product for radiation sterilization that can be obtained at low cost.
本発明者らは、放射線照射による熱可塑性樹脂の異臭を
抑制することができ且つ成形品の外観に優れた熱可塑性
樹脂組成物について鋭意研究した結果、熱可塑性樹脂に
ハイドロタルサイト類を練込んだ熱可塑性樹脂組成物か
ら成形したフィルム等の成形品を用いることが、目的達
成に有効であることを見出した。The present inventors have diligently studied a thermoplastic resin composition capable of suppressing the offensive odor of the thermoplastic resin due to radiation irradiation and having an excellent appearance of a molded product, and as a result, kneaded hydrotalcites into the thermoplastic resin. It has been found that the use of a molded product such as a film molded from the thermoplastic resin composition is effective for achieving the purpose.
即ち、本発明の放射線滅菌用熱可塑性樹脂成形品は、熱
可塑性樹脂にハイドロタルサイト類を0.001〜１重量％
配合してなる熱可塑性樹脂組成物から成形したことを特
徴とする。That is, the thermoplastic resin molded article for radiation sterilization of the present invention contains 0.001 to 1% by weight of hydrotalcites in the thermoplastic resin.
It is characterized by being molded from the thermoplastic resin composition formed by blending.
本発明を更に詳しく説明すると、本発明で用いる熱可塑
性樹脂は、低密度ポリエチレン、高密度ポリエチレン、
直鎖状低密度ポリエチレン、ポリプロピレン、ポリブテ
ン−１、エチレン−プロピレン共重合体、エチレン−ビ
ニルアセテート共重合体、エチレン−ビニルアルコール
共重合体等のオレフィン系重合体及び共重合体、ポリ塩
化ビニル、ポリ塩化ビニリデン等である。To explain the present invention in more detail, the thermoplastic resin used in the present invention includes low density polyethylene, high density polyethylene,
Linear low-density polyethylene, polypropylene, polybutene-1, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer and other olefin-based polymers and copolymers, polyvinyl chloride, Examples thereof include polyvinylidene chloride.
本発明において、熱可塑性樹脂に配合するハイドロタル
サイト類は塩基性アルミニウム・マグネシウム・カーボ
ネート・ハイドレートの総称であり、その一般式は〔Mg
1-XAlX(OH)2〕X +〔(CO3 2-)X/2・mH2O〕X-（ただし、ｘ
は0.3〜0.33、ｍは０〜0.5の数）で表わされる。In the present invention, hydrotalcites to be mixed with a thermoplastic resin is a general term for basic aluminum magnesium carbonate carbonate hydrate, and its general formula is [Mg
1-X Al X (OH) 2 ] X + [(CO 3 2- ) X / 2・ mH 2 O] X- (however, x
Is 0.3 to 0.33, and m is a number from 0 to 0.5).
例えば、このハイドロタルサイト類を練り込んだポリオ
レフィン系樹脂組成物から成形したフィルム等の成形品
は、放射線照射によって発生したカルボン酸などの異臭
成分を有効裡に補足し、照射臭の発生を極力抑えること
ができる。すなわち、その作用機構は、上記一般式から
分るようにCO3 2-がイオン交換性であるため、放射線照
射によって発生した異臭の主因であるカルボン酸類と反
応し、CO3 2-がカルボン酸イオンにイオン交換されるこ
とによるもので、また、このようにイオン交換されたハ
イドロタルサイト類は熱的にも安定である。For example, a molded article such as a film molded from a polyolefin-based resin composition in which the hydrotalcites are kneaded effectively captures offensive odor components such as carboxylic acid generated by irradiation of radiation, and the generation of irradiation odor is minimized. Can be suppressed. That is, the mechanism of action is that CO 3 2− is ion-exchangeable as shown in the above general formula, so that it reacts with carboxylic acids that are the main cause of the offensive odor generated by irradiation, and CO 3 2− is carboxylic acid. The hydrotalcites are ion-exchanged into ions, and the ion-exchanged hydrotalcites are also thermally stable.
ハイドロタルサイト類の熱可塑性樹脂に対する配合量は
0.001重量％、好ましくは0.005重量％を下限とすること
が必要で、それを下回ると本発明の効果が発現しない。
また配合量を余り多くすると、成形品の透明性の外観が
損なわれるから、上限を１重量％、好ましくは0.9重量
％、特に好ましくは0.8重量％に留めることが必要であ
る。The blending amount of hydrotalcites with respect to the thermoplastic resin is
It is necessary to set the lower limit to 0.001% by weight, preferably 0.005% by weight, below which the effect of the present invention will not be exhibited.
Further, if the blending amount is too large, the transparent appearance of the molded product is impaired, so it is necessary to keep the upper limit at 1% by weight, preferably 0.9% by weight, particularly preferably 0.8% by weight.
熱可塑性樹脂にハイドロタルサイト類を配合してなる熱
可塑性樹脂組成物は、公知の成形方法によりフィルム、
シート、袋、容器などの成形品に加工される。例えば、
食品や医療用の包装材料として用いられるフィルムを例
にとれば、Ｔダイ法、インフレーション法、エクストル
ージョンコートにより成形したフィルムで物品を密封し
た後、放射線を照射すると、確実に殺菌効果を挙げるこ
とができる。The thermoplastic resin composition obtained by blending a thermoplastic resin with hydrotalcites is a film by a known molding method,
Processed into molded products such as sheets, bags and containers. For example,
Taking a film used as a packaging material for foods and medical products as an example, it is possible to surely obtain a bactericidal effect by irradiating radiation after sealing an article with a film formed by a T-die method, an inflation method or an extrusion coat. You can
使用される放射線としては、ガンマ線、電子線等の電磁
放射線があり、一般にはコバルト−60によるガンマ線が
用いられる。照射強度は１〜5Mradの範囲で用いられ、
医療用としては通常２〜3Mradの線量が用いられる。The radiation used includes electromagnetic radiation such as gamma rays and electron rays, and gamma rays of cobalt-60 are generally used. Irradiation intensity is used in the range of 1-5 Mrad,
For medical use, a dose of 2-3 Mrad is usually used.
本発明の放射線滅菌用熱可塑性樹脂成形品は、異種の熱
可塑性樹脂の積層物であってもよく、また，成形品に収
容する物品は任意のものでよく、例えば食品類、注射
筒、注射針、点滴用器具、脱脂綿、縫合糸等の医療器具
などの密封包装品を有効に放射線殺菌することができ
る。The thermoplastic resin molded article for radiation sterilization of the present invention may be a laminate of different kinds of thermoplastic resins, and the article contained in the molded article may be any, for example, foods, syringes, injections. It is possible to effectively sterilize sealed packages such as needles, drip instruments, absorbent cotton, and medical instruments such as sutures.
以下に、本発明の実施例、比較例及び試験例を挙げて本
発明を更に具体的に説明する。Hereinafter, the present invention will be described more specifically with reference to Examples, Comparative Examples and Test Examples of the present invention.
実施例１ ハイドロタルサイト（DHT 4A、協和化学工業株式会社
製）を低密度ポリエチレン（ショウレックスF134、昭和
電工株式会社製）に0.01重量％配合し、得られた樹脂組
成物からインフレーション法にて160℃で厚み50μｍの
フィルムを成形した。Example 1 0.01% by weight of hydrotalcite (DHT 4A, manufactured by Kyowa Chemical Industry Co., Ltd.) was blended with low density polyethylene (SHOLEX F134, manufactured by Showa Denko KK) by an inflation method from the obtained resin composition. A film having a thickness of 50 μm was formed at 160 ° C.
比較例１ ハイドロタルサイトを配合しなかったこと以外は実施例
１と同様にして、厚み50μｍのフィルムを成形した。Comparative Example 1 A film having a thickness of 50 μm was formed in the same manner as in Example 1 except that hydrotalcite was not added.
実施例２ ハイドロタルサイト（DHT 4A）をポリプロピレン（シ
ョウアロマーFZ410、エチレンとプロピレンとの共重合
体でMFRは7g/10min、昭和電工株式会社製）に0.01重量
％配合し、得られた樹脂組成物からＴダイ法にて230℃
で厚み50μｍのフィルムを成形した。Example 2 Hydrotalcite (DHT 4A) was blended with polypropylene (show allomer FZ410, a copolymer of ethylene and propylene with an MFR of 7 g / 10 min, manufactured by Showa Denko KK) in an amount of 0.01% by weight to obtain a resin composition. 230 ° C from the object by T-die method
A 50 μm thick film was molded with.
比較例２ ハイドロタルサイトを配合しなかったこと以外は実施例
２と同様にして、厚み50μｍのフィルムを成形した。Comparative Example 2 A film having a thickness of 50 μm was formed in the same manner as in Example 2 except that hydrotalcite was not added.
比較例３ ハイドロタルサイトに代えて水酸化カルシウムを用いた
こと以外は実施例１と同様にして、厚み50μｍのフィル
ムを成形した。Comparative Example 3 A film having a thickness of 50 μm was formed in the same manner as in Example 1 except that calcium hydroxide was used instead of hydrotalcite.
比較例４ ハイドロタルサイトに代えて水酸化カルシウムを用いた
こと以外は実施例２と同様にして厚み50μｍのフィルム
を成形した。Comparative Example 4 A film having a thickness of 50 μm was formed in the same manner as in Example 2 except that calcium hydroxide was used instead of hydrotalcite.
実施例３ ハイドロタルサイト（DHT 4A）をポリプロピレン（シ
ョウアロマーFZ410）に0.05重量％配合し、得られた樹
脂組成物からＴダイ法にて230℃で厚み50μｍのフィル
ムを成形した。Example 3 Hydrotalcite (DHT 4A) was blended with polypropylene (Shaw Aroma FZ410) in an amount of 0.05% by weight, and a film having a thickness of 50 μm was formed from the obtained resin composition at 230 ° C. by a T-die method.
実施例４ ハイドロタルサイト（DHT 4A）をポリプロピレン（シ
ョウアロマーFZ410）に0.6重量％配合し、実施例２と同
様にして、厚み50μｍのフィルムを成形した。Example 4 Hydrotalcite (DHT 4A) was blended with polypropylene (Showallomer FZ410) at 0.6% by weight, and a film having a thickness of 50 μm was formed in the same manner as in Example 2.
実施例５ ハイドロタルサイト（DHT 4A）を低密度ポリエチレン
（ショウレックスF134）に0.8重量％配合し、実施例１
と同様にして、厚み50μｍのフィルムを成形した。Example 5 Hydrotalcite (DHT 4A) was mixed with 0.8% by weight of low density polyethylene (SHOLEX F134), and Example 1 was used.
A film having a thickness of 50 μm was formed in the same manner as in.
比較例５ ハイドロタルサイト（DHT 4A）をポリプロビレン（シ
ョウアロマーFZ410）に３重量％配合し、実施例２と同
様にして、厚み50μｍのフィルムを成形した。Comparative Example 5 Hydrotalcite (DHT 4A) was blended in 3% by weight of polypropylene (SHOAROMER FZ410), and a film having a thickness of 50 μm was formed in the same manner as in Example 2.
比較例６ ハイドロタルサイト（DHT 4A）を低密度ポリエチレン
（ショウレックスF134）に３重量％配合し、実施例１と
同様にして、厚み50μｍのフィルムを成形した。Comparative Example 6 Hydrotalcite (DHT 4A) was blended in low-density polyethylene (Shorex F134) in an amount of 3% by weight, and a film having a thickness of 50 μm was formed in the same manner as in Example 1.
比較例７ ハイドロタルサイト（DHT 4A）をポリプロピレン（シ
ョウアロマーFZ410）に７重量％配合し、実施例２と同
様にして、厚み50μｍのフィルムを成形した。Comparative Example 7 Hydrotalcite (DHT 4A) was blended with polypropylene (Show Allomer FZ410) in an amount of 7% by weight, and a film having a thickness of 50 μm was formed in the same manner as in Example 2.
比較例８ ハイドロタルサイト（DHT 4A）を低密度ポリエチレン
（ショウレックスF134）に７重量％配合し、実施例１と
同様にして、厚み50μｍのフィルムを成形した。Comparative Example 8 Hydrotalcite (DHT 4A) was blended into low-density polyethylene (Shorex F134) in an amount of 7% by weight, and a film having a thickness of 50 μm was formed in the same manner as in Example 1.
なお、実施例１〜５及び比較例１〜８で用いた熱可塑性
樹脂の種類、添加剤の種類及び量（重量％）をまとめる
と次の通りである： 試験例 以上の各実施例及び比較例で得たフィルムについて下記
のように試験を行なった。The types of thermoplastic resins used in Examples 1 to 5 and Comparative Examples 1 to 8 and the types and amounts (% by weight) of additives are summarized as follows: Test Example The films obtained in the above Examples and Comparative Examples were tested as follows.
まず、実施例１〜３及び比較例１〜２で得た各フィルム
20gをそれぞれ容量100mlのガラス瓶に入れ、密封し、コ
バルト−60線源にて2.5Mrad又は5.0Mradのガンマ線照射
を行なった。このようにしてガンマ線照射を行なったガ
ラス瓶中のガスを1ccガスタイトシリンジでサンプリン
グし、ガスクロマトグラフィー島津GC−7A型、検出器FI
D、キャピラリカラムFFAPを用いて酢酸量を定量した。
その結果を表２に示す。First, each film obtained in Examples 1-3 and Comparative Examples 1-2.
20 g of each was placed in a glass bottle having a capacity of 100 ml, sealed, and irradiated with gamma rays of 2.5 Mrad or 5.0 Mrad with a cobalt-60 radiation source. The gas in the glass bottle irradiated with gamma rays in this way was sampled with a 1cc gas tight syringe, and gas chromatography was carried out using a Shimadzu GC-7A model, detector FI.
D, The amount of acetic acid was quantified using a capillary column FFAP.
The results are shown in Table 2.
次に、実施例１〜３及び比較例１〜２で得た各フィルム
からそれぞれ20cm×20cmのパウチを作り、四方シール密
封をし、2.5Mrad又は5Mradのガンマ線を照射し、臭気官
能テストを行なった。臭気官能テストにおいては下記の
基準で評価した： １……全然感じない ２……若干感じる ３……かなり感じる ４……やや強く感じる ５……強烈に感じる その結果を表３に示す。 Next, pouches of 20 cm × 20 cm were made from the films obtained in Examples 1 to 3 and Comparative Examples 1 to 2, sealed in a four-sided seal, irradiated with 2.5 Mrad or 5 Mrad gamma rays, and subjected to an odor sensory test. It was In the odor sensory test, evaluation was made according to the following criteria: 1 ... not felt at all 2 ... slightly felt 3 ... slightly felt 4 ... slightly strong 5 ... strongly felt Table 3 shows the results.
また、実施例１〜５及び比較例１〜８で得た各フィルム
の透明性についJISK−6714に従ってヘイズの測定を行な
った。更に、実施例１〜５及び比較例１〜８で得た各フ
ィルムを１フィート四方の大きさにサンプリングし、ル
ーペを用いた下記の基準でフィッシュアイの大きさ及び
数を測定した： 大……直径が0.5mm以上のもの 中……直径が0.2mm以上0.5mm未満のもの 小……直径が0.1mm以上0.2mm未満のもの 更にまた、実施例１〜５及び比較例１〜８で得た各フィ
ルムから32cm×1mの大きさに各々10枚サンプリングし、
10枚のフィルムについて目視により下記の基準でゲルナ
ンバーを測定した： １……全くゲルなし、又は１枚のみ長さ5cm以下のゲル
発生 ２……２枚以下に5cm以下のゲル発生 ３……５枚以下に5cm以下のゲル発生 ４……５枚以下に5cm以上のゲル発生 ５……５枚以上に5cm以上のゲル発生、又は１枚以上の
全面にゲル発生 これらの結果を表４に示す。 Further, the haze of each of the films obtained in Examples 1 to 5 and Comparative Examples 1 to 8 was measured according to JIS K-6714. Further, each of the films obtained in Examples 1 to 5 and Comparative Examples 1 to 8 was sampled in a size of 1 foot square, and the size and number of fish eyes were measured according to the following criteria using a magnifying glass: Large ... ... with a diameter of 0.5 mm or more Medium ... with a diameter of 0.2 mm or more and less than 0.5 mm Small ... with a diameter of 0.1 mm or more and less than 0.2 mm Furthermore, obtained in Examples 1-5 and Comparative Examples 1-8 From each film, sample 10 pieces each in the size of 32 cm × 1 m,
The gel number of 10 films was visually measured according to the following criteria: 1 ... No gel at all, or only one film had a length of 5 cm or less 2 ... 2 film or less had a gel size of 5 cm or less 3 ... 5cm or less gel generation of 5cm or less 4 …… 5cm or less gel generation of 5cm or more 5 …… 5 or more gel generation of 5cm or more, or 1 or more gel generation on the entire surface These results are shown in Table 4. Show.
〔発明の効果〕 以上で明らかな如く、本発明の放射線滅菌用熱可塑性樹
脂成形品は熱可塑性樹脂に適量のハイドロタルサイトを
配合した樹脂組成物から成形したものであるので、ガン
マ線照射による異臭の発生を確実に防止でき、しかも成
形品の外観を損なうことがなく、安価に提供でき、従っ
て特に食品、医療用分野の密封包装品の放射線照射によ
る滅菌の目的に多大の貢献をすることができる。 [Effects of the Invention] As is clear from the above, since the thermoplastic resin molded article for radiation sterilization of the present invention is molded from a resin composition in which an appropriate amount of hydrotalcite is mixed with a thermoplastic resin, it has an offensive odor due to gamma ray irradiation. Can be reliably prevented, and can be provided at a low cost without damaging the appearance of the molded product, and therefore, it can greatly contribute to the purpose of sterilization by irradiation of hermetically sealed products especially in the food and medical fields. it can.
Claims (1)
001〜１重量％配合してなる熱可塑性樹脂組成物から成
形したことを特徴とする放射線滅菌用熱可塑性樹脂成形
品。1. A thermoplastic resin containing no hydrotalcites.
A thermoplastic resin molded product for radiation sterilization, which is molded from a thermoplastic resin composition containing 001 to 1% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178943A JPH0699586B2 (en) | 1986-07-31 | 1986-07-31 | Thermoplastic resin molding for radiation sterilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178943A JPH0699586B2 (en) | 1986-07-31 | 1986-07-31 | Thermoplastic resin molding for radiation sterilization |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6015052A Division JP2728361B2 (en) | 1994-02-09 | 1994-02-09 | Radiation sterilization method for sealed packaging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6337155A JPS6337155A (en) | 1988-02-17 |
| JPH0699586B2 true JPH0699586B2 (en) | 1994-12-07 |
Family
ID=16057355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61178943A Expired - Lifetime JPH0699586B2 (en) | 1986-07-31 | 1986-07-31 | Thermoplastic resin molding for radiation sterilization |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0699586B2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930737B2 (en) * | 1975-10-18 | 1984-07-28 | 三井化学株式会社 | polyolefin composition |
| JPS55135153A (en) * | 1979-04-11 | 1980-10-21 | Mitsui Petrochem Ind Ltd | Polyolefin composition for biaxially stretched film |
| JPS56120739A (en) * | 1980-02-29 | 1981-09-22 | Mitsui Petrochem Ind Ltd | Polyolefin composition for uniaxially stretched film |
| JPS57200433A (en) * | 1981-06-05 | 1982-12-08 | Mitsui Petrochem Ind Ltd | Polyolefin resin composition |
| JPS60104141A (en) * | 1983-11-12 | 1985-06-08 | Kyowa Chem Ind Co Ltd | Agricultural film |
| JPS61145239A (en) * | 1984-12-20 | 1986-07-02 | Mitsui Petrochem Ind Ltd | Plastic molding capable of radiation treatment |
-
1986
- 1986-07-31 JP JP61178943A patent/JPH0699586B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6337155A (en) | 1988-02-17 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |