JPH05230239A - Antistatic anti-fogging polyester sheet having good transparency - Google Patents

Antistatic anti-fogging polyester sheet having good transparency

Info

Publication number
JPH05230239A
JPH05230239A JP4233145A JP23314592A JPH05230239A JP H05230239 A JPH05230239 A JP H05230239A JP 4233145 A JP4233145 A JP 4233145A JP 23314592 A JP23314592 A JP 23314592A JP H05230239 A JPH05230239 A JP H05230239A
Authority
JP
Japan
Prior art keywords
sheet
antistatic
weight
polyester
parts
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
JP4233145A
Other languages
Japanese (ja)
Inventor
Kenji Misumi
健志 三隅
Masaki Yamamoto
正樹 山本
Hironori Kawamura
博紀 河村
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.)
Kanebo Ltd
Original Assignee
Kanebo Ltd
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 Kanebo Ltd filed Critical Kanebo Ltd
Priority to JP4233145A priority Critical patent/JPH05230239A/en
Publication of JPH05230239A publication Critical patent/JPH05230239A/en
Pending legal-status Critical Current

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  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To obtain the title sheet which is excellent in antistatic effect or in both antistatic and anti-fogging effects and well retains the effect(s) by incorporating a derivative of a metal alkylbenzenesulfonate into a polyester having an ethylene terephthalate unit as the main repeating unit and melt-extruding the mixture. CONSTITUTION:100 pts.wt. polyester having an ethylene terephthalate unit as the main repeating unit is mixed with 0.1-3.5 pts.wt. derivative (a) of a metal alkylbenzenesulfonate and the mixture is melt-extruded to obtain the title sheet. In producing a single-layer sheet, the polyester is mixed desirably with 0.2-2.0 pts.wt. derivative of a metal alkylbenzensulfonate in which the alkyl is 10-14C, more desirably with 0.3-1.7 pts.wt. sodium dodecylbenzenesulfonate, to thereby enable the film to combine good antistatic properties and transparency. In the case of a multilayered sheet, the derivative (a) is incorporated into at least a surface layer.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は制電性又は制電性と防曇
性の持続に優れ、透明性良好な熱可塑性ポリエステルシ
ートの製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a thermoplastic polyester sheet having excellent antistatic property or antistatic property and antifogging property and excellent transparency.

【0002】[0002]

【従来の技術】熱可塑性樹脂よりなるシートは一般に、
容易に帯電し、そのためにシートを加工して得られる製
品が、表面にゴミやホコリ等を吸着して外観を損ねるば
かりでなく、静電気を帯びてシート同士が互いに吸着し
あうために熱成形加工,その他成形品の取り扱いの際等
に支障をきたすという問題があった。
2. Description of the Related Art Generally, a sheet made of a thermoplastic resin is
The product that is easily charged and processed by processing the sheet for that purpose not only harms the appearance by adsorbing dust and dust on the surface, but also thermoforms it because the sheets are attracted to each other due to being charged with static electricity. However, there was a problem that it interfered with the handling of other molded products.

【0003】従来、このような問題を解決するために、
シートの表面に制電剤を塗布する方法,または熱可塑性
樹脂材料に制電剤を練りこみシート化する方法等が行わ
れてきた。しかしながら、シートの表面に制電剤を塗布
する方法では、洗浄や熱成形時に金型等にふれて制電剤
が剥離し、制電効果が失われやすい。又シートの印刷
性,接着性,ヒートシール性等を阻害し、後加工性を低
下させる。一方、シートに制電剤を練り込みシート化す
る方法は、熱可塑性樹脂に練り込ませた制電剤がシート
化した後でシート表面に溶出することによって制電効果
が出てくるものである。しかしながら、制電剤のシート
表面への溶出現象そのものが、熱可塑性樹脂と制電剤と
の間に相溶性がないことによって生じる現象なので、シ
ート表面に溶出した制電剤は容易にシート表面から脱落
する。脱落した制電剤をおぎなう為、シート内部から溶
出するには時間がかかり、その間制電効果が減少する。
又制電効果が充分に発揮できるまで制電剤を添加すれば
ポリエステルシートの特徴である透明性が損なわれる。
Conventionally, in order to solve such a problem,
A method of applying an antistatic agent to the surface of a sheet, a method of kneading an antistatic agent into a thermoplastic resin material to form a sheet, and the like have been performed. However, in the method of applying the antistatic agent to the surface of the sheet, the antistatic agent is likely to be peeled off by touching the mold during cleaning or thermoforming, and the antistatic effect is easily lost. In addition, the printability, adhesiveness, heat sealability, etc. of the sheet are impaired, and the post-processability is reduced. On the other hand, the method of kneading an antistatic agent into a sheet to form a sheet is one in which the antistatic agent kneaded into a thermoplastic resin is formed into a sheet and then eluted on the surface of the sheet to produce an antistatic effect. .. However, the elution phenomenon of the antistatic agent to the sheet surface itself is a phenomenon caused by the incompatibility between the thermoplastic resin and the antistatic agent, so the antistatic agent eluted on the sheet surface can be easily removed from the sheet surface. take off. Since the fallen antistatic agent is covered, it takes time to elute from the inside of the sheet, and the antistatic effect decreases during that time.
If the antistatic agent is added until the antistatic effect is sufficiently exerted, the transparency characteristic of the polyester sheet is impaired.

【0004】一般にポリエステルフィルムでは、この制
電剤の溶出にかかる時間を短縮するため一方向又は二方
向に延伸して、シート表面に多量の制電剤を溶出させる
方法が取られている。更に延伸して薄くする事で透明性
も改善させようとしている。
In general, a polyester film is stretched in one or two directions in order to shorten the time required for elution of the antistatic agent, so that a large amount of the antistatic agent is eluted on the surface of the sheet. It is also trying to improve transparency by further stretching and thinning.

【0005】[0005]

【発明が解決しようとする課題】本発明者等は、制電効
果又は制電と防曇効果に優れ、且つ効果の持続と透明性
を持ったポリエステルシートを得ることを目的として鋭
意検討の結果、本発明に到達したものである。すなわち
本発明者らは、アルキルベンゼンスルホン酸金属塩誘導
体好ましくはアルキル基の炭素数10〜14,より好ま
しくは炭素数12のドデシルベンゼンスルホン酸ソーダ
を、ポリエステル100重量部に対して0.1〜2.0
重量部配合することで、目的とする制電性を有し且つ透
明性を持ったシートを得ることが出来た。更に検討した
結果、本発明者等は、アルキルベンゼンスルホン酸金属
塩誘導体を0.7〜3.5重量部、好ましくは単層では
1.2〜2.0重量部、多層では1.2〜3.5重量部
配合した場合、優れた防曇性をも発揮することを見出し
た。
DISCLOSURE OF INVENTION Problems to be Solved by the Invention As a result of intensive investigations by the present inventors, a polyester sheet having excellent antistatic effect or antistatic effect and antifogging effect, and having a continuous effect and transparency is obtained. The present invention has been reached. That is, the present inventors have used an alkylbenzene sulfonic acid metal salt derivative, preferably an alkyl group having 10 to 14 carbon atoms, and more preferably having 12 carbon atoms of sodium dodecylbenzene sulfonate, in an amount of 0.1 to 2 per 100 parts by weight of polyester. .0
By blending parts by weight, it was possible to obtain a sheet having the desired antistatic property and transparency. As a result of further study, the present inventors have found that the alkylbenzene sulfonic acid metal salt derivative is 0.7 to 3.5 parts by weight, preferably 1.2 to 2.0 parts by weight in a single layer and 1.2 to 3 in a multilayer. It has been found that when it is blended in an amount of 0.5 part by weight, it also exhibits excellent antifogging properties.

【0006】[0006]

【課題を解決するための手段】上記の目的は、エチレン
テレフタレート単位を主たる繰返し単位とするポリエス
テル100重量部に対して、アルキルベンゼンスルホン
酸金属塩誘導体が0.1〜3.5重量部配合され、溶融
押出しされたポリエステルシートによって達成される。
The above object is to add 0.1 to 3.5 parts by weight of an alkylbenzene sulfonic acid metal salt derivative to 100 parts by weight of a polyester having ethylene terephthalate units as main repeating units, This is accomplished with a melt extruded polyester sheet.

【0007】以下本発明を詳細に説明する。本発明に用
いられるポリエステルはエチレンテレフタレート単位を
主たる繰返し単位とする(通常80モル%以上)熱可塑
性ポリエステル樹脂であって、具体的にはポリエチレン
テレフタレート,イソフタル酸やアジピン酸或いはポリ
エチレングリコール,1,4ブタンジオール,1,4シ
クロヘキサンジメタノールの共重合体等が挙げられる。
The present invention will be described in detail below. The polyester used in the present invention is a thermoplastic polyester resin having an ethylene terephthalate unit as a main repeating unit (usually 80 mol% or more), and specifically, polyethylene terephthalate, isophthalic acid, adipic acid, polyethylene glycol, 1,4 Examples thereof include butanediol and a copolymer of 1,4 cyclohexanedimethanol.

【0008】本発明のポリエステルシートは上記ポリエ
ステル樹脂をTダイ法やインフレーション法等の公知の
方法により溶融押出成形して得られたものであり、単層
でも多層であってもよく、シートの厚さは通常0.15
〜3mmである。本発明は上記ポリエステルシート10
0重量部にアルキルベンゼンスルホン酸金属塩誘導体を
0.1〜3.5重量部配合するが、単層シートの場合好
ましくはアルキル基の炭素数10〜14のアルキルベン
ゼンスルホン酸金属塩誘導体0.2〜2.0重量部、更
に好ましくは炭素数12のドデシルベンゼンスルホン酸
ソーダ0.3〜1.7重量部配合する事で、制電性と透
明性を同時に満足したポリエステルシートが得られる。
防曇性も賦与する目的の場合には、1.2〜2.0重量
部が好ましい。
The polyester sheet of the present invention is obtained by melt-extruding the above polyester resin by a known method such as a T-die method or an inflation method, and may be a single layer or a multilayer, and the sheet thickness Saha is usually 0.15
~ 3 mm. The present invention relates to the above polyester sheet 10
0.1 to 3.5 parts by weight of the alkylbenzene sulfonic acid metal salt derivative is mixed with 0 part by weight, but in the case of a single layer sheet, preferably, the alkylbenzene sulfonic acid metal salt derivative having an alkyl group having 10 to 14 carbon atoms is 0.2 to By blending 2.0 parts by weight, more preferably 0.3 to 1.7 parts by weight of sodium dodecylbenzenesulfonate having 12 carbon atoms, a polyester sheet satisfying both antistatic property and transparency can be obtained.
For the purpose of imparting antifogging property, 1.2 to 2.0 parts by weight is preferable.

【0009】また、多層シートの場合にはアルキルベン
ゼンスルホン酸金属塩誘導体をシートの少なくとも片面
に配合することが好ましい。この場合、シートの厚さが
減少するほど透明性により制限される配合量の上限は緩
和されるので、配合量は0.3〜3.5重量部である。
防曇性を賦与する目的の場合には、1.2〜3.5重量
部が好ましい。
In the case of a multi-layered sheet, it is preferable to blend an alkylbenzene sulfonic acid metal salt derivative on at least one side of the sheet. In this case, the upper limit of the blending amount, which is limited by the transparency, is relaxed as the thickness of the sheet decreases, so the blending amount is 0.3 to 3.5 parts by weight.
For the purpose of imparting antifogging property, 1.2 to 3.5 parts by weight is preferable.

【0010】尚、本発明においてはシートの滑り性を改
善するために、有機系シリコン平滑剤を塗布したり、微
粒子状の滑剤を配合することもできる。
In the present invention, in order to improve the slipperiness of the sheet, an organic silicon smoothing agent may be applied or a fine particle lubricant may be added.

【0011】[0011]

【発明の効果】以上のように本発明のポリエステルシー
トは、アルキルベンゼンスルホン酸金属塩誘導体を0.
1〜3.5重量部配合する事で制電性又は制電性と防曇
性に優れ、且つと透明性にも優れており、真空成形や圧
空成形により熱成形した容器やブリスター或いは折曲げ
によるケースなどに有用である。特に防曇性を賦与した
シートは、食品用容器として有用である。
INDUSTRIAL APPLICABILITY As described above, the polyester sheet of the present invention contains the alkylbenzene sulfonic acid metal salt derivative of 0.1.
By blending 1 to 3.5 parts by weight, it is excellent in antistatic property or antistatic property and antifogging property, and also excellent in transparency, and is a container, blister or bent that is thermoformed by vacuum forming or pressure forming. It is useful for cases such as. In particular, the sheet imparted with antifogging property is useful as a food container.

【0012】[0012]

【実施例】【Example】

実施例1 ポリエチレンテレフタレート樹脂100重量部に対し、
ドデシルベンゼンスルホン酸ソーダ1重量部を配合し、
常法に従い75mmφの単軸押出機によりTダイを通し
て溶融押出しを行い、厚さ0.25mmのシートを作製
して、下記の事項について試験を行った。
Example 1 With respect to 100 parts by weight of polyethylene terephthalate resin,
Add 1 part by weight of sodium dodecylbenzene sulfonate,
Melt extrusion was performed through a T-die with a 75 mmφ single-screw extruder according to a conventional method to prepare a sheet having a thickness of 0.25 mm, and the following items were tested.

【0013】透明性(ヘイズ):シート厚み0.25m
mで日本電色工業NDH Σ80カラーメジャリングシ
ステムを使って測定する。本発明のシートは通常12以
下のヘイズ、好ましくは8以下のヘイズを有する。 制電性:シート表面をウール布で20回(約1回/se
c)こすり10秒後に乾燥したタバコの灰の上2.5c
mに近づけ静電気での灰の吸着状況を観察した。灰を吸
引付着すれば×、付着しなければ○とした。 防曇性:50℃の温水250mlを300mlの広口ガ
ラスコップに入れ、23℃、65RHの雰囲気下でシー
トを被せて1分後の曇り状態を観察し、表1の評価付け
を行った。 表面抵抗:横川電気 HIGE RESISTANCE METER 4329Aと東
亜電波工業の分銅電極入電磁遮蔽箱で測定する。
Transparency (haze): Sheet thickness 0.25 m
Measured using a Nippon Denshoku Industries NDH Σ80 color measuring system at m. The sheet of the present invention usually has a haze of 12 or less, preferably 8 or less. Anti-static property: Wool cloth on the sheet surface 20 times (about 1 time / se
c) 2.5c on dry tobacco ash after 10 seconds of rubbing
The state of adsorption of ash by static electricity was observed by approaching m. When the ash was attached by suction, it was rated as ×, and when it was not attached, it was rated as ○. Anti-fogging property: 250 ml of 50 ° C. warm water was put in a 300 ml wide-mouth glass cup, the sheet was covered under an atmosphere of 23 ° C. and 65 RH, and the cloudy state after 1 minute was observed, and the evaluation of Table 1 was performed. Surface resistance: Measured with Yokogawa Electric HIGE RESISTANCE METER 4329A and Toa Denpa Kogyo's electromagnetic shield box with weight electrode.

【0014】[0014]

【表1】 [Table 1]

【0015】実施例2 実施例1と同じ樹脂と制電剤を用いて、制電剤の添加量
を2重量部として実施例1と同様にシートを作製し、試
験を行った。
Example 2 Using the same resin and antistatic agent as in Example 1, a sheet was prepared and tested in the same manner as in Example 1 except that the amount of antistatic agent added was 2 parts by weight.

【0016】実施例3 ポリエチレンテレフタレート樹脂を中間層に、ポリエチ
レンテレフタレート樹脂100重量部に対しドデシルベ
ンゼンスルホン酸ソーダ2重量部を配合したものを上下
表面層にした、厚さ0.25mmのシートを作製して、
同様の試験を行った(厚み比1:8:1)。
Example 3 A sheet having a thickness of 0.25 mm was prepared in which a polyethylene terephthalate resin was used as an intermediate layer and 100 parts by weight of the polyethylene terephthalate resin was mixed with 2 parts by weight of sodium dodecylbenzenesulfonate as upper and lower surface layers. do it,
The same test was performed (thickness ratio 1: 8: 1).

【0017】次いで真空熱成形によりシートからサラダ
容器を製造し、ポテトサラダを充填し、5℃の冷蔵庫に
1時間保管したところ、曇りは認められなかった。
Then, a salad container was manufactured from the sheet by vacuum thermoforming, filled with potato salad, and stored in a refrigerator at 5 ° C. for 1 hour. No cloudiness was observed.

【0018】比較例1 実施例1の樹脂だけを用いて、実施例1と同様にしてシ
ートを作製した。
Comparative Example 1 A sheet was prepared in the same manner as in Example 1 using only the resin of Example 1.

【0019】比較例2 実施例1の樹脂に多価アルコール脂肪酸エステルを主成
分とした制電剤1重量部を配合して実施例1と同様にし
て、シートを作製した。
Comparative Example 2 A sheet was prepared in the same manner as in Example 1 except that 1 part by weight of an antistatic agent containing a polyhydric alcohol fatty acid ester as a main component was added to the resin of Example 1.

【0020】比較例3 ジグリセリン脂肪酸エステルを主成分とする制電剤1重
量部を配合して、実施例1と同様にしてシートを作製し
た。
Comparative Example 3 A sheet was prepared in the same manner as in Example 1 except that 1 part by weight of an antistatic agent containing diglycerin fatty acid ester as a main component was mixed.

【0021】比較例4 ドデシルベンゼンスルホン酸ソーダ4重量部を配合する
以外、実施例1と同様にしてポリエステルシートを作製
した。
Comparative Example 4 A polyester sheet was prepared in the same manner as in Example 1 except that 4 parts by weight of sodium dodecylbenzenesulfonate was added.

【0022】実施例1、2及び3のドデシルベンゼンス
ルホン酸ソーダ配合シートは、ヘイズが良好で制電効果
が大きく、実施例2、3は防曇効果も大きい。制電剤無
添加の比較例1では透明性は良いが、制電効果及び防曇
効果が悪い。比較例2の多価アルコール脂肪酸エステル
系制電剤及び比較例4は、制電効果及び防曇効果は良い
がヘイズが非常に悪くなる。又、比較例3のジグリセリ
ン脂肪酸エステル系制電剤は透明性は良いが、制電効果
及び防曇効果は不充分であった。以上の実施例,比較例
の測定結果を表2にまとめた。
The sheets containing sodium dodecylbenzene sulfonate of Examples 1, 2 and 3 have a good haze and a large antistatic effect, and Examples 2 and 3 have a large antifogging effect. In Comparative Example 1 in which the antistatic agent is not added, the transparency is good, but the antistatic effect and the antifogging effect are poor. The polyhydric alcohol fatty acid ester-based antistatic agent of Comparative Example 2 and Comparative Example 4 have good antistatic effect and antifogging effect, but haze becomes very poor. Further, the diglycerin fatty acid ester antistatic agent of Comparative Example 3 had good transparency, but the antistatic effect and antifogging effect were insufficient. Table 2 summarizes the measurement results of the above Examples and Comparative Examples.

【0023】[0023]

【表2】 [Table 2]

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 B29K 105:32 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location B29K 105: 32

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 エチレンテレフタレート単位を主たる繰
返し単位とするポリエステル100重量部に対して、ア
ルキルベンゼンスルホン酸金属塩誘導体が0.1〜3.
5重量部配合され、溶融押出しされたポリエステルシー
ト。
1. An alkylbenzene sulfonic acid metal salt derivative of 0.1 to 3 parts by weight per 100 parts by weight of a polyester containing ethylene terephthalate units as a main repeating unit.
5 parts by weight of a melt-extruded polyester sheet.
【請求項2】 アルキルベンゼンスルホン酸金属塩誘導
体がドデシルベンゼンスルホン酸ソーダである請求項1
記載のシート。
2. The alkylbenzene sulfonic acid metal salt derivative is sodium dodecylbenzene sulfonate.
The listed sheet.
JP4233145A 1991-12-27 1992-08-06 Antistatic anti-fogging polyester sheet having good transparency Pending JPH05230239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4233145A JPH05230239A (en) 1991-12-27 1992-08-06 Antistatic anti-fogging polyester sheet having good transparency

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP3-360467 1991-12-27
JP36046791 1991-12-27
JP4233145A JPH05230239A (en) 1991-12-27 1992-08-06 Antistatic anti-fogging polyester sheet having good transparency

Publications (1)

Publication Number Publication Date
JPH05230239A true JPH05230239A (en) 1993-09-07

Family

ID=26530873

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4233145A Pending JPH05230239A (en) 1991-12-27 1992-08-06 Antistatic anti-fogging polyester sheet having good transparency

Country Status (1)

Country Link
JP (1) JPH05230239A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003089242A1 (en) * 2002-04-19 2003-10-30 Dupont Teijin Films U.S. Limited Partnership Anti-fog heat shrinkable laminate useful for packaging
JP2017210570A (en) * 2016-05-27 2017-11-30 三菱ケミカル株式会社 Laminated polyester film
JP2023043252A (en) * 2021-09-16 2023-03-29 竹本油脂株式会社 Polyester resin film modifier, polyester resin composition, polyester resin film, and laminated film

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003089242A1 (en) * 2002-04-19 2003-10-30 Dupont Teijin Films U.S. Limited Partnership Anti-fog heat shrinkable laminate useful for packaging
JP2017210570A (en) * 2016-05-27 2017-11-30 三菱ケミカル株式会社 Laminated polyester film
JP2023043252A (en) * 2021-09-16 2023-03-29 竹本油脂株式会社 Polyester resin film modifier, polyester resin composition, polyester resin film, and laminated film
US11746213B2 (en) 2021-09-16 2023-09-05 Takemoto Yushi Kabushiki Kaisha Modifier for polyester-based resin film, polyester-based resin composition, polyester-based resin film, and multilayer film

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