JP3213466B2 - Refrigerator interior parts - Google Patents
Refrigerator interior partsInfo
- Publication number
- JP3213466B2 JP3213466B2 JP32685493A JP32685493A JP3213466B2 JP 3213466 B2 JP3213466 B2 JP 3213466B2 JP 32685493 A JP32685493 A JP 32685493A JP 32685493 A JP32685493 A JP 32685493A JP 3213466 B2 JP3213466 B2 JP 3213466B2
- Authority
- JP
- Japan
- Prior art keywords
- parts
- weight
- chemical formula
- compound represented
- resin
- 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
Landscapes
- Refrigerator Housings (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポリスチレン樹脂製冷
蔵庫内装部品、詳しくは、耐低温クレーズ性に優れたポ
リスチレン樹脂製冷蔵庫内装部品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator interior part made of a polystyrene resin, and more particularly to a refrigerator interior part made of a polystyrene resin having excellent low-temperature craze resistance.
【０００２】[0002]
【従来の技術】冷蔵庫内の棚、扉、トレイ、各種ケース
類などの内装部品にプラスチックが使用されている。な
かでも、たとえば、内容物が見える様に透明性が必要な
部品には、スチレン−アクリロニトリル共重合体（以下
ＡＳ樹脂と略す）やポリスチレン樹脂（以下ＰＳ樹脂と
略す）が使用されている。2. Description of the Related Art Plastics are used for interior parts such as shelves, doors, trays and various cases in a refrigerator. Above all, for example, styrene-acrylonitrile copolymer (hereinafter abbreviated as AS resin) or polystyrene resin (hereinafter abbreviated as PS resin) is used for parts that require transparency so that the contents can be seen.
【０００３】[0003]
【発明が解決しようとする課題】近年、価格低減を目的
として、ＡＳ樹脂製の部品をＰＳ樹脂製に置きかえるこ
とが進みつつある。ところが、特に、冷凍室、氷温度な
ど、低温雰囲気下で使用される部品をＰＳ樹脂に置き換
えた場合、部品の形状などによっては、長時間低温状態
に置いておくと細かいクレーズが発生するという問題点
がある。In recent years, for the purpose of cost reduction, replacement of parts made of AS resin with parts made of PS resin is progressing. However, in particular, when parts used in low-temperature atmospheres such as freezing rooms and ice temperatures are replaced with PS resin, depending on the shape of the parts, there is a problem that fine crazes are generated if left in a low-temperature state for a long time. There is a point.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、上記の問
題点を解決すべく鋭意検討した結果、特定の化合物を含
有してなるＰＳ樹脂からなる冷蔵庫内装部品が耐低温ク
レーズ性に優れることを見いだし、本発明に至った。即
ち、ポリスチレン樹脂１００重量部に対して、化学式
（１）及び／または、化学式（２）で示される化合物
０．５〜５重量部を添加してなる樹脂組成物からなる、
透明でかつ耐低温クレーズ性に優れた冷蔵庫内装部品で
ある。Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that refrigerator interior parts made of PS resin containing a specific compound have excellent low-temperature craze resistance. This led to the present invention. That is, the resin composition comprises a resin composition obtained by adding 0.5 to 5 parts by weight of a compound represented by the chemical formula (1) and / or (2) to 100 parts by weight of a polystyrene resin.
Refrigerator interior parts that are transparent and have excellent low-temperature craze resistance.
【化３】（１） Ｒ−ＮＨ−ＣＨ2 ＣＨ2 ＯＨ （式中、Ｒは炭素数８〜１８のアルキル基を示す。）Embedded image (1) R—NH—CH 2 CH 2 OH (where R represents an alkyl group having 8 to 18 carbon atoms)
【化４】（２） Ｒ−Ｎ（ＣＨ2 ＣＨ2 ＯＨ）2 （式中、Ｒは炭素数８〜１８のアルキル基を示す。）本
発明に用いるポリスチレン樹脂とは、スチレン単量体の
単独重合体（いわゆるＧＰポリスチレン）であり、その
重合法は、懸濁重合、塊状重合などいずれの方法でもか
まわない。本発明のポリスチレン樹脂は、必要に応じ
て、少量の着色剤、酸化防止剤、離型剤、紫外線吸収
剤、帯電防止剤を含有してもかまわない。Embedded image (2) RN (CH 2 CH 2 OH) 2 (wherein R represents an alkyl group having 8 to 18 carbon atoms.) The polystyrene resin used in the present invention is a styrene monomer.
It is a homopolymer (so-called GP polystyrene), and its polymerization method may be any method such as suspension polymerization and bulk polymerization. The polystyrene resin of the present invention can be used as needed.
May contain a small amount of a colorant, an antioxidant, a release agent, an ultraviolet absorber, and an antistatic agent .
【０００５】本発明に用いる化学式（１）で示される化
合物は炭素数が８〜１８のアルキル基を有するエタノー
ルアミンであり、炭素数が異なるアルキル基を有するエ
タノールアミン２種以上の混合物であっても構わない。
また、化学式（２）で示される化合物は、炭素数が８〜
１８のアルキル基を有するジエタノールアミンであり、
炭素数が異なるアルキル基を有するジエタノールアミン
２種以上の混合物であっても構わない。本発明に用いる
化学式（１）で示される化合物、または、化学式（２）
で示される化合物は、上記のポリスチレン樹脂１００重
量部に対して０．５〜５重量部添加して用いる。添加量
が０．５重量部未満では、耐低温クレーズ性が劣り、５
重量部を越えると、押出ペレット化するときに押出機内
で樹脂がスリップして安定して押し出せなかったり、成
形時に金型を汚染したり、ブリードアウト等が生じ、成
形品の外観を損なったりすることがあるので好ましくな
い。The compound represented by the chemical formula (1) used in the present invention is an ethanolamine having an alkyl group having 8 to 18 carbon atoms, and a mixture of two or more ethanolamines having an alkyl group having different carbon atoms. No problem.
Further, the compound represented by the chemical formula (2) has a carbon number of 8 to
Diethanolamine having an alkyl group of 18;
A mixture of two or more diethanolamines having alkyl groups having different carbon numbers may be used. The compound represented by the chemical formula (1) used in the present invention or the chemical formula (2)
Is used in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the polystyrene resin. If the amount is less than 0.5 part by weight, the low-temperature craze resistance is poor, and
When the amount exceeds the weight part, the resin slips in the extruder during extrusion pelletization and cannot be extruded stably. It is not preferable because it may cause
【０００６】本発明の冷蔵庫内装部品は、該ポリスチレ
ン樹脂に化学式（１）及び／または化学式（２）で示さ
れる化合物を含有させた樹脂組成物からなるが、該ポリ
スチレン樹脂に化学式（１）及び／または化学式（２）
で示される化合物を含有させる方法としては、該ポリス
チレン樹脂を押出ペレット化するときに溶融混合させる
方法、該ポリスチレン樹脂の重合時に添加しておく方
法、該ポリスチレン樹脂ペレットにまぶして押出機に投
入し再度溶融混合してペレット化する方法、該ポリスチ
レン樹脂ペレットにまぶして直接部品を成形する成形機
に投入する方法などがあるが、いずれの方法でもかまわ
ない。[0006] The refrigerator interior part of the present invention comprises a resin composition containing the compound represented by the chemical formula (1) and / or the chemical formula (2) in the polystyrene resin. / Or chemical formula (2)
As a method for containing the compound represented by the following, a method in which the polystyrene resin is melt-mixed when extruded into pellets, a method in which the polystyrene resin is added at the time of polymerization of the polystyrene resin, and the polystyrene resin pellets are poured into an extruder. There are a method of melt-mixing and pelletizing again, a method of dusting the polystyrene resin pellets and directly putting them into a molding machine for molding a part, and the like, but any method may be used.
【０００７】また、本発明の冷蔵庫部品の成形方法とし
ては、生産性や、寸法精度、外観などから射出成形が好
ましいが、特に限定されるものではない。In addition, as a method for molding a refrigerator component of the present invention, injection molding is preferred from the viewpoint of productivity, dimensional accuracy, appearance, etc., but is not particularly limited.
【０００８】[0008]
【実施例】以下に、実施例で本発明を詳しく説明する。 実施例１ ポリスチレン樹脂であるトーポレックス５７０（三井東
圧化学社製）１００重量部に、炭素数が１４のアルキル
基を有する化学式（１）示される化合物１重量部を混合
したのち、中谷機械社製の二軸押出機ＳＡ−３０によ
り、２００℃で溶融して押し出し、ペレットを得た。こ
のペレットを用いて、日本製鋼所製射出成形機１００Ｓ
Ａにより射出成形して、幅１０ｃｍ、長さ１５ｃｍ、厚
さ２ｍｍのプレートを得た。得られたプレートは外観も
良好で透明性に優れたものであった。このプレート１０
枚を、マイナス７０℃の雰囲気下に２週間放置したの
ち、クレーズの発生の有無を観察したところ、いずれの
プレートにおいてもクレーズの発生は認められなかっ
た。The present invention will be described below in detail with reference to examples. Example 1 After 100 parts by weight of TOPOLEX 570 (manufactured by Mitsui Toatsu Chemicals), which is a polystyrene resin, 1 part by weight of a compound represented by the chemical formula (1) having an alkyl group having 14 carbon atoms was mixed, and then Nakatani Machinery Co., Ltd. Was melted and extruded at 200 ° C. by a twin-screw extruder SA-30 (trade name) to obtain pellets. Using these pellets, an injection molding machine 100S manufactured by Japan Steel Works, Ltd.
A was injection molded to obtain a plate having a width of 10 cm, a length of 15 cm, and a thickness of 2 mm. The obtained plate had good appearance and excellent transparency. This plate 10
After the sheets were allowed to stand for two weeks in an atmosphere of minus 70 ° C., the occurrence of crazing was observed. No crazing was observed on any of the plates.
【０００９】実施例２ 実施例１において、化学式（１）で示される化合物を４
重量部添加する以外は実施例１と同様にしてペレット化
し、プレートを成形した。得られたプレートは外観も良
好で、透明性に優れたものであった。このプレート１０
枚を用いて、実施例１と同様なテストを実施したが、い
ずれのプレートにおいてもクレーズの発生は認められな
かった。Example 2 In Example 1, the compound represented by the chemical formula (1)
Except for adding parts by weight, pelletization was performed in the same manner as in Example 1 to form a plate. The resulting plate had good appearance and excellent transparency. This plate 10
The same test as in Example 1 was performed using the sheets, but no crazing was observed on any of the plates.
【００１０】実施例３ ポリスチレン樹脂であるトーポレックス５２５（三井東
圧化学社製）１００重量部に、炭素数が１２のアルキル
基を有する化学式（２）示される化合物３重量部を混合
したのち、中谷機械〓製の二軸押出機ＳＡ−３０によ
り、２００℃で溶融して押し出し、ペレットを得た。こ
のペレットを用いて、日本製鋼所製射出成形機１００Ｓ
Ａにより射出成形して、幅１０ｃｍ、長さ１５ｃｍ、厚
さ２ｍｍのプレートを得た。得られたプレートは外観も
良好で透明性に優れたものであった。このプレート１０
枚を用いて、実施例１と同様なテストを実施したが、い
ずれのプレートにおいてもクレーズの発生は認められな
かった。Example 3 100 parts by weight of TOPOLEX 525 (manufactured by Mitsui Toatsu Chemicals), a polystyrene resin, were mixed with 3 parts by weight of a compound represented by the chemical formula (2) having an alkyl group having 12 carbon atoms. It was melted and extruded at 200 ° C. by a twin screw extruder SA-30 manufactured by Nakatani Machinery Co., Ltd. to obtain pellets. Using these pellets, an injection molding machine 100S manufactured by Japan Steel Works, Ltd.
A was injection molded to obtain a plate having a width of 10 cm, a length of 15 cm, and a thickness of 2 mm. The obtained plate had good appearance and excellent transparency. This plate 10
The same test as in Example 1 was performed using the sheets, but no crazing was observed on any of the plates.
【００１１】比較例１ ポリスチレン樹脂であるトーポレックス５７０（三井東
圧化学社製）に化学式（１）または、化学式（２）で示
される化合物を添加せずに、実施例１と同様にしてプレ
ートを得た。得られたプレートは外観も良好で、透明性
に優れたものであった。このプレート１０枚を用いて、
実施例１と同様なテストを実施したが、いずれのプレー
トにおいても微細なクレーズが発生しているのが認めら
た。Comparative Example 1 A plate was prepared in the same manner as in Example 1 except that the compound represented by the chemical formula (1) or (2) was not added to Toporex 570 (manufactured by Mitsui Toatsu Chemicals), a polystyrene resin. I got The resulting plate had good appearance and excellent transparency. Using these 10 plates,
A test similar to that in Example 1 was performed, but it was found that fine craze occurred in each of the plates.
【００１２】比較例２ 実施例１において、化学式（１）で示される化合物を
０．１重量部添加する以外は実施例１と同様にしてプレ
ートを得た。得られたプレートは外観も良好で、透明性
に優れたものであった。このプレート１０枚を用いて、
実施例１と同様なテストを実施したが、８枚のプレート
において微細なクレーズが発生しているのが認めらた。Comparative Example 2 A plate was obtained in the same manner as in Example 1 except that 0.1 part by weight of the compound represented by the chemical formula (1) was added. The resulting plate had good appearance and excellent transparency. Using these 10 plates,
The same test as in Example 1 was performed, but it was found that fine crazes occurred on the eight plates.
【００１３】比較例３ 実施例３において、化学式（２）で示される化合物を８
重量部添加する以外は実施例３と同様にしてプレートを
得た。得られたプレートは若干霞がかかり、表面にブリ
ードアウトが認められた。Comparative Example 3 In Example 3, the compound represented by the chemical formula (2) was replaced with 8
A plate was obtained in the same manner as in Example 3 except that parts by weight were added. The resulting plate was slightly hazy and bleed out was observed on the surface.
【００１４】実施例４ 実施例１、実施例２および実施例３で得られたプレート
各１０枚を冷蔵庫の冷凍室に３か月間放置したが、いず
れのプレートにも以上は認められなかった。Example 4 Each of the 10 plates obtained in Examples 1, 2 and 3 was allowed to stand in a freezer compartment of a refrigerator for 3 months, but none of these plates was recognized.
【００１５】比較例４ 比較例１および比較例２で得られたプレート各１０枚を
冷蔵庫の冷凍室に３か月間放置したが、いずれのプレー
トにも微細なクレーズが発生した。Comparative Example 4 Each of the 10 plates obtained in Comparative Examples 1 and 2 was left in a freezer of a refrigerator for 3 months, and fine crazes occurred on all the plates.
【００１６】[0016]
【発明の効果】本発明の冷蔵庫内装部品は、低温下での
耐クレーズ性に優れるので、特に、冷凍室やいわゆる氷
温室などの部品に好適に使用できる。また、本発明の冷
蔵庫内装部品は透明性が優れるので、冷凍室内のケース
の扉などに用いるとケース内の食品が容易に判別でき
る。The refrigerator interior parts of the present invention have excellent craze resistance at low temperatures, and thus can be suitably used particularly for parts such as freezing rooms and so-called ice greenhouses. Further, since the refrigerator interior parts of the present invention have excellent transparency, when used as a door of a case in a freezer compartment, food in the case can be easily identified.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 雨宮 英夫 神奈川県横浜市栄区笠間町1190番地 三 井東圧化学株式会社内 (56)参考文献 特開 昭52−78952（ＪＰ，Ａ) 特開 昭53−65339（ＪＰ，Ａ) 特開 昭63−227643（ＪＰ，Ａ) 特開 平５−171000（ＪＰ，Ａ) 特開 平２−138350（ＪＰ，Ａ) 特開 平５−155949（ＪＰ，Ａ) 特開 平５−320462（ＪＰ，Ａ) 特開 平５−320463（ＪＰ，Ａ) 特開 平５−339450（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C08L 25/00 - 25/18 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideo Amemiya 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Mitsui Toatsu Chemicals Co., Ltd. (56) References JP-A-52-78952 (JP, A) JP-A-53 JP-A-65339 (JP, A) JP-A-63-227643 (JP, A) JP-A-5-171000 (JP, A) JP-A-2-138350 (JP, A) JP-A-5-155949 (JP, A) JP-A-5-320462 (JP, A) JP-A-5-320463 (JP, A) JP-A-5-339450 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C08L 25/00-25/18
Claims (1)
スチレン樹脂と言う）１００重量部に対して、化学式
（１）及び／または、化学式（２）で示される化合物
０．５〜５重量部を添加してなる樹脂組成物からなる、
透明でかつ耐低温クレーズ性に優れた冷蔵庫内装部品。 【化１】（１） Ｒ−ＮＨ−ＣＨ2 ＣＨ2 ＯＨ （式中、Ｒは炭素数８〜１８のアルキル基を示す。） 【化２】（２） Ｒ−Ｎ（ＣＨ2 ＣＨ2 ＯＨ）2 （式中、Ｒは炭素数８〜１８のアルキル基を示す。）1. A styrene homopolymer resin (hereinafter simply referred to as poly
A resin composition obtained by adding 0.5 to 5 parts by weight of a compound represented by the chemical formula (1) and / or (2) to 100 parts by weight.
Refrigerator interior parts that are transparent and have excellent low-temperature craze resistance. Embedded image (1) R—NH—CH 2 CH 2 OH (wherein, R represents an alkyl group having 8 to 18 carbon atoms). (2) RN (CH 2 CH 2 OH) ) 2 (wherein, R represents an alkyl group having 8 to 18 carbon atoms.)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32685493A JP3213466B2 (en) | 1993-12-24 | 1993-12-24 | Refrigerator interior parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32685493A JP3213466B2 (en) | 1993-12-24 | 1993-12-24 | Refrigerator interior parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07179693A JPH07179693A (en) | 1995-07-18 |
| JP3213466B2 true JP3213466B2 (en) | 2001-10-02 |
Family
ID=18192466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32685493A Expired - Lifetime JP3213466B2 (en) | 1993-12-24 | 1993-12-24 | Refrigerator interior parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3213466B2 (en) |
-
1993
- 1993-12-24 JP JP32685493A patent/JP3213466B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07179693A (en) | 1995-07-18 |
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