JPH05222238A - Method for modifying wettability of resin foam - Google Patents

Method for modifying wettability of resin foam

Info

Publication number
JPH05222238A
JPH05222238A JP2925992A JP2925992A JPH05222238A JP H05222238 A JPH05222238 A JP H05222238A JP 2925992 A JP2925992 A JP 2925992A JP 2925992 A JP2925992 A JP 2925992A JP H05222238 A JPH05222238 A JP H05222238A
Authority
JP
Japan
Prior art keywords
gas
resin foam
wettability
treatment
foam
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
JP2925992A
Other languages
Japanese (ja)
Inventor
Hiroshi Ueda
博 上田
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP2925992A priority Critical patent/JPH05222238A/en
Publication of JPH05222238A publication Critical patent/JPH05222238A/en
Pending legal-status Critical Current

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  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

PURPOSE:To uniformly carry out modify the wettability on the surface of a resin foam or in the interior of bubbles according to a simple and efficient method by exposing the resin foam to an atmosphere of a reactional gas. CONSTITUTION:A resin foam is exposed to an atmosphere of a reactional gas such as a halogen, carbon disulfide or ozone. For example, a hermetically sealed container 5 designed to feed a gas through a reactional gas feed control valve 9 and a feed control valve 8 for diluting nitrogen gas is used to always monitor the reactional gas concentration with a gas concentration sensing regulator 6. The pressure in the hermetically sealed container 5 is usually maintained at atmospheric pressure and the atmosphere in the hermetically sealed container 5 is kept uniform with circulating fans 7. A vent port is connected to a waste gas treating apparatus. In the case of an open-cell foam, a resin foam sheet 4 is introduced into the hermetically sealed container and compressed with pinch rolls 10. The treatment with the reactional gas is then carried out and the resin foam sheet is recompressed with pinch rolls 11 and subsequently taken out to the outside. In the case of a closed-cell foam, the compression is not always required.

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、各種樹脂発泡体の濡れ
性改質方法に関し、更に詳しくは、発泡体を損傷するこ
となく、簡便かつ効率的な方法により樹脂発泡体の表面
または気泡内部の濡れ性を改質する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for modifying the wettability of various resin foams. More specifically, the present invention relates to a method for improving the wettability of various resin foams. And a method of modifying the wettability of the same.

【0002】[0002]

【従来の技術】従来、樹脂発泡体は、主として緩衝材と
して使用されているが、その大部分は発泡体を単体で使
用するのではなく、例えば、(1)紙、異質プラスチッ
クス、アルミ等の表皮を樹脂発泡体に融着加工して複合
材としたり、あるいは(2)樹脂発泡体に粘着剤や接着
剤を塗布し、他の基材に貼付して使用している。
2. Description of the Related Art Conventionally, resin foam has been mainly used as a cushioning material, but most of them do not use the foam alone, for example, (1) paper, foreign plastics, aluminum, etc. The outer skin of (1) is fused to a resin foam to form a composite material, or (2) a resin foam is coated with an adhesive or an adhesive and attached to another substrate for use.

【0003】このように、樹脂発泡体を複合材に成形し
たり、他の基材に貼付するには、強固に融着、粘着また
は接着する機能を有することが樹脂発泡体に求められ
る。
Thus, in order to form a resin foam into a composite material or to attach it to another substrate, the resin foam is required to have a function of firmly fusing, sticking or adhering.

【0004】また、連続気泡発泡体の場合には、連続気
泡内部に濡れ性を付与することにより、例えば、保水量
を向上させたり、あるいは連続気泡内部に粘着シール材
の含浸加工を行ってシーラント材の機能向上を図ってい
る。
In the case of an open-cell foam, for example, by imparting wettability to the inside of the open-cell, for example, the amount of water retention is improved, or the inside of the open-cell is impregnated with an adhesive sealing material to obtain a sealant. We are trying to improve the function of the material.

【0005】ところで、ポリオレフィン系樹脂発泡体な
どのように、樹脂発泡体には、濡れ性が低く、他の物質
との接着性に劣るものが多い。従来、樹脂発泡体の表面
を改質し、濡れ性を改善する方法としては、極性基を付
与する方法がある。極性基付与の方法としては、一般
に、原料樹脂に極性樹脂をブレンドする方法、樹脂発泡
体をコロナ放電処理する方法、あるいは発泡体にカップ
リング剤を塗布含浸処理する方法等が採用されている。
Many resin foams, such as polyolefin resin foams, have low wettability and poor adhesion to other substances. Conventionally, as a method of modifying the surface of a resin foam to improve the wettability, there is a method of adding a polar group. As a method of imparting a polar group, a method of blending a polar resin with a raw material resin, a method of corona discharge treatment of a resin foam, a method of coating and impregnating a foam with a coupling agent, and the like are generally adopted.

【0006】これらの方法の中で、極性樹脂をブレンド
する方法は、極性樹脂のコストが高く、しかも発泡体の
製造過程で気泡の生成を阻害したり、相手基材ごとにフ
レンド材料の選択を強いられるため汎用性に乏しい等の
欠点がある。
Among these methods, the method of blending a polar resin is high in the cost of the polar resin, and further inhibits the generation of bubbles in the production process of the foam, and selects a friend material for each mating base material. There are drawbacks such as poor versatility because it is forced.

【0007】コロナ放電処理法は、高い処理度を得よう
とすると、局部放電により樹脂発泡体シートの幅方向に
処理ムラが発生し、極端な場合には樹脂発泡体にピンホ
ールが発生する。しかも、コロナ放電処理法では、連続
気泡の内部を均一に処理することは困難である。カップ
リング剤による塗布処理法は、設備、ランニングコスト
が高い欠点がある。
[0007] In the corona discharge treatment method, when a high degree of treatment is to be obtained, local discharge causes uneven treatment in the width direction of the resin foam sheet, and in extreme cases, pinholes are generated in the resin foam. Moreover, with the corona discharge treatment method, it is difficult to uniformly treat the inside of the open cells. The coating method using a coupling agent has the drawback of high equipment and running costs.

【0008】[0008]

【発明が解決しようとする課題】本発明の目的は、簡便
かつ効率的な方法により樹脂発泡体の表面または気泡内
部の濡れ性を改質する方法を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for modifying the wettability of the surface of a resin foam or the inside of cells by a simple and efficient method.

【0009】本発明者らは、上記の欠点のない極性基の
付与方法を鋭意研究した結果、樹脂発泡体を反応性ガス
雰囲気に曝らすことにより、樹脂発泡体を損傷すること
なく、均一に表面改質を行うことができ、連続気泡内部
に対しても均一な処理が可能であることを見いだした。
本発明は、これらの知見に基づいて完成するに至ったも
のである。
The inventors of the present invention have made extensive studies as to a method for imparting a polar group without the above-mentioned defects, and as a result, by exposing the resin foam to a reactive gas atmosphere, the resin foam is uniformly damaged without being damaged. It has been found that the surface can be modified and the uniform treatment can be performed even inside the open cells.
The present invention has been completed based on these findings.

【0010】[0010]

【課題を解決するための手段】本発明によれば、樹脂発
泡体を反応ガス雰囲気に曝すことを特徴とする樹脂発泡
体の濡れ性改質方法が提供される。
According to the present invention, there is provided a method for modifying the wettability of a resin foam, which comprises exposing the resin foam to a reaction gas atmosphere.

【0011】以下、本発明について詳細に説明する。本
発明における樹脂発泡体の濡れ性改質方法は、反応性の
強いガス雰囲気に直接発泡体を通して、発泡体の表面ま
たは連続気泡内部に極性基を付与する方法である。
The present invention will be described in detail below. The method for modifying the wettability of a resin foam according to the present invention is a method in which a foam is directly passed through a highly reactive gas atmosphere to impart a polar group to the surface of the foam or the inside of open cells.

【0012】本発明の方法は、ドライの状態で、連続的
処理を簡単な工程により実施することができる。また、
濡れ性改質の程度(処理度)についても、使用する反応
ガスの種類、反応ガスの濃度、樹脂発泡体の反応ガス帯
域での通過速度などを適宜組み合わせることにより任意
に調整することができる。樹脂発泡体の幅方向での処理
ムラをコロナ放電処理と比較して小さくすることができ
る。反応ガスは、気体であるため、連続気泡の内部まで
均一に処理することができる。
The method of the present invention allows continuous treatment in a dry state by simple steps. Also,
The degree of wettability modification (the degree of treatment) can also be arbitrarily adjusted by appropriately combining the type of reaction gas to be used, the concentration of the reaction gas, the passage speed of the resin foam in the reaction gas zone, and the like. Treatment unevenness in the width direction of the resin foam can be reduced as compared with the corona discharge treatment. Since the reaction gas is a gas, it is possible to uniformly process the inside of the open cells.

【0013】本発明の濡れ性改質方法について、図2を
参照しながら説明する。密閉容器(5)内に樹脂発泡体
シート(4)を導入する。密閉容器には、反応ガス供給
調節弁(9)および希釈用の窒素ガス供給調節弁(8)
を介してガスを供給するようにしてある。反応ガス濃度
は、ガス濃度検出調節器(6)によって常時監視され、
反応ガス、窒素ガス調節弁で濃度が調節される。密閉容
器内の圧力は、通常、ほぼ大気圧に維持される。また、
密閉容器内の雰囲気は、循環ファン(7)により撹拌さ
れて均一に保たれている。密閉容器内の上部に設けられ
た排気口は、排気処理設備(12)へと連結されてい
る。
The wettability modification method of the present invention will be described with reference to FIG. The resin foam sheet (4) is introduced into the closed container (5). The closed container has a reaction gas supply control valve (9) and a nitrogen gas supply control valve (8) for dilution.
The gas is supplied via the. The reaction gas concentration is constantly monitored by the gas concentration detection controller (6),
The concentration is adjusted by the reaction gas and nitrogen gas control valve. The pressure in the closed container is usually maintained at about atmospheric pressure. Also,
The atmosphere in the closed container is agitated by the circulation fan (7) to be kept uniform. An exhaust port provided in the upper part of the closed container is connected to an exhaust treatment facility (12).

【0014】連続気泡発泡体の場合には、樹脂発泡体シ
ート(4)は、密閉容器内に導入されると、まず一対の
ピンチロール(10)により圧縮され、次いで反応ガス
による処理を受けた後、一対のピンチロール(11)に
より再度圧縮されてから密閉容器の外に搬出される。な
お、実施例では、出入口と各ピンチロールとの間の距離
は約1mとした。独立気泡発泡体の場合には、必ずしも
圧縮用のピンチロールを通す必要はない。
In the case of open-cell foam, the resin foam sheet (4), when introduced into a closed container, was first compressed by a pair of pinch rolls (10) and then treated with a reaction gas. After that, it is recompressed by the pair of pinch rolls (11) and then carried out of the closed container. In the examples, the distance between the doorway and each pinch roll was about 1 m. In the case of closed cell foam, it is not necessary to pass pinch rolls for compression.

【0015】反応ガスとしては、樹脂発泡体の濡れ性を
改質できるものであればよく、特に限定されないが、具
体的には、フッ素ガスなどのハロゲン、二硫化炭素、オ
ゾンなどを挙げることができる。反応ガスは、通常、窒
素ガスなどの不活性ガスで希釈して使用する。また、雰
囲気中または樹脂発泡体表面に微量の酸素ガスが存在す
ると、極性基が生成しやすく、濡れ性が向上する。樹脂
発泡体および雰囲気の温度は高いほど反応性に富む。
The reaction gas is not particularly limited as long as it can modify the wettability of the resin foam, and specific examples thereof include halogen such as fluorine gas, carbon disulfide and ozone. it can. The reaction gas is usually diluted with an inert gas such as nitrogen gas before use. Further, when a small amount of oxygen gas is present in the atmosphere or on the surface of the resin foam, polar groups are easily generated and the wettability is improved. The higher the temperature of the resin foam and the atmosphere, the more reactive it is.

【0016】[0016]

【実施例】以下、本発明について、実施例および比較例
を挙げて具体的に説明する。
EXAMPLES The present invention will be specifically described below with reference to Examples and Comparative Examples.

【0017】[実施例及び比較例]以下に示す3種類の
発泡体を使用し、以下に示す処理手段と処理条件によ
り、反応ガス処理及びコロナ放電処理を行った。
[Examples and Comparative Examples] Using the following three kinds of foams, the reaction gas treatment and the corona discharge treatment were performed by the treatment means and the treatment conditions shown below.

【0018】<性能評価用発泡体>濡れ性改質試験の性
能評価のために、次の3種類の発泡体を使用した。 (1)発泡体A 低密度ポリエチレン独立気泡発泡体〔積水化学(株)
製、商品名ソフトロンS、発砲倍率30倍、厚み2m
m〕 (2)発泡体B ポリプロピレン独立気泡発泡体〔積水化学(株)製、商
品名ソフトロンPP、発泡倍率25倍、厚み3mm〕 (3)発泡体C 低密度ポリエチレン連続気泡発泡体〔積水化学(株)
製、商品名ソフトロンレンポウ、発泡倍率20倍、厚み
15mm〕
<Foams for Performance Evaluation> The following three kinds of foams were used for the performance evaluation of the wettability modification test. (1) Foam A Low-density polyethylene closed-cell foam [Sekisui Chemical Co., Ltd.
Made, product name Softlon S, firing rate 30 times, thickness 2m
m] (2) Foam B Polypropylene closed-cell foam [manufactured by Sekisui Chemical Co., Ltd., trade name Softlon PP, expansion ratio 25 times, thickness 3 mm] (3) Foam C low-density polyethylene open-cell foam [Sekisui Chemical Co., Ltd.
Made, brand name Soft Ron Renpo, foaming ratio 20 times, thickness 15 mm]

【0019】<処理手段及び処理条件> (1)反応ガス処理 反応ガスの種類:フッ素ガス フッ素ガス濃度:1.36%(残ガス:窒素) 発泡体及び雰囲気温度:25℃ (2)コロナ放電処理 装置:春日電機株式会社製コロナ放電処理機、型式HF
SS−203 電圧:205V 電流:44A 電極バー径:8mm 電極バーと発泡体のギャップ:10mm <処理度評価用濡れ試薬>エチレングリコールモノエチ
ルエーテル
<Treatment Means and Treatment Conditions> (1) Reaction Gas Treatment Reactive gas type: Fluorine gas Fluorine gas concentration: 1.36% (residual gas: nitrogen) Foam and ambient temperature: 25 ° C. (2) Corona discharge Treatment equipment: Kasuga Electric Co., Ltd. corona discharge treatment machine, model HF
SS-203 Voltage: 205V Current: 44A Electrode bar diameter: 8mm Gap between electrode bar and foam: 10mm <Wetting reagent for treating degree evaluation> Ethylene glycol monoethyl ether

【0020】結果と評価 〔1〕発泡体B(ソフトロンPP)を前記条件によりフ
ッ素ガス処理及びコロナ放電処理を行った。処理速度
は、フッ素ガス処理の場合には10m/分に、コロナ放
電処理の場合には10m/分と30m/分とした。
Results and Evaluation [1] Foam B (Softron PP) was subjected to fluorine gas treatment and corona discharge treatment under the above conditions. The treatment speed was 10 m / min for the fluorine gas treatment, and 10 m / min and 30 m / min for the corona discharge treatment.

【0021】図1に各処置後の発泡体Bの濡れ性につい
ての経時変化を示す。図1中、1はフッ素ガス処理(処
理速度10m/分)、2はコロナ放電処理(処理速度1
0m/分)、3はコロナ放電処理(30m/分)を示
す。図1の縦軸は濡れ性(単位:dyne/cm)、横
軸は経過日数を示す。
FIG. 1 shows the time-dependent change in the wettability of the foam B after each treatment. In FIG. 1, 1 is fluorine gas treatment (treatment speed 10 m / min), 2 is corona discharge treatment (treatment speed 1
0 m / min), 3 indicates corona discharge treatment (30 m / min). In FIG. 1, the vertical axis represents wettability (unit: dyne / cm), and the horizontal axis represents elapsed days.

【0022】図1から明らかなように、フッ素ガス処理
の場合(1)には、処理後30日を経過しても50dy
ne/cmと高い濡れ性を示している。なお、発泡体B
の未処理品の濡れ性は31dyne/cmであった。こ
れに対して、コロナ放電処理の場合(2、3)には、初
期及び経時的な濡れ性がともに低いものである。〔2〕
発泡体A(ソフトロンS)を用いて、前記条件によりフ
ッ素ガス処理及びコロナ放電処理を行った。結果を表1
に示す。
As is apparent from FIG. 1, in the case of the fluorine gas treatment (1), 50 dy was obtained even after 30 days from the treatment.
It has a high wettability of ne / cm. The foam B
The wettability of the untreated product was 31 dyne / cm. On the other hand, in the case of the corona discharge treatment (2, 3), the wettability is low both in the initial stage and over time. [2]
Using the foam A (Softlon S), fluorine gas treatment and corona discharge treatment were performed under the above conditions. The results are shown in Table 1.
Shown in.

【0023】[0023]

【表1】 [Table 1]

【0024】表1から明らかなように、フッ素ガス処理
の場合には、発泡体シートの幅方向の濡れ性は均一であ
り、処理度を上げてもピンホールの発生などの不都合は
生じなかった。これに対して、コロナ放電処理の場合に
は、処理度を上げて行くにしたがい濡れ性のバラツキお
よびピンホールが発生した。なお、未処理品の濡れ性は
33dyne/cmであった。
As is clear from Table 1, in the case of the fluorine gas treatment, the wettability of the foam sheet in the width direction was uniform, and even if the treatment degree was increased, no inconvenience such as pinholes occurred. . On the other hand, in the case of the corona discharge treatment, the wettability varied and pinholes were generated as the treatment degree was increased. The wettability of the untreated product was 33 dyne / cm.

【0025】〔3〕発泡体C(ソフトロン レンポウ)
を用いて、前記条件によりフッ素ガス処理及びコロナ放
電処理を行った。結果を表2に示す。
[3] Foam C (Softlon Lempow)
Was used to perform the fluorine gas treatment and the corona discharge treatment under the above conditions. The results are shown in Table 2.

【0026】[0026]

【表2】 [Table 2]

【0027】表2から明らかなように、フッ素ガス処理
の場合には、発泡体シートの表面層の濡れ性と厚み方向
中心層の濡れ性は同等になっており、優れた改質効果を
示している。これに対して、コロナ放電処理の場合に
は、厚み方向中心層の濡れ性は未処理品の50dyne
/cmと同等であった。
As is clear from Table 2, in the case of the fluorine gas treatment, the wettability of the surface layer of the foam sheet and the wettability of the center layer in the thickness direction are the same, showing an excellent modifying effect. ing. On the other hand, in the case of corona discharge treatment, the wettability of the center layer in the thickness direction is 50 dyne of the untreated product.
It was equivalent to / cm.

【0028】[0028]

【発明の効果】本発明によれば、簡単で経済的な方法に
より、樹脂発泡体の表面または気泡内部の濡れ性を均一
に改質することができる。濡れ性の改質された独立気泡
発泡体は、粘着・接着加工材、複合材等として有用であ
り、連続気泡発泡体の場合には、折板屋根材の断熱兼結
露保水材等として有用である。
According to the present invention, the wettability of the surface of a resin foam or the inside of cells can be uniformly modified by a simple and economical method. The closed-cell foam with improved wettability is useful as an adhesive / adhesive processed material, composite material, etc., and in the case of the open-cell foam, it is also useful as a heat insulating / condensation water retaining material for a folded sheet roofing material. is there.

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

【図1】処理方法の違いによる樹脂発泡体の濡れ性経時
変化を示すグラフである。
FIG. 1 is a graph showing changes over time in wettability of resin foams due to differences in treatment methods.

【図2】本発明による樹脂発泡体の濡れ性改質方法を示
す説明図である。
FIG. 2 is an explanatory view showing a method for modifying the wettability of a resin foam according to the present invention.

【符号の説明】[Explanation of symbols]

1 フッ素ガス処理品(処理速度10m/分) 2 コロナ放電処理品(処理速度10m/分) 3 コロナ放電処理品(処理速度30m/分) 4 発泡体シート 5 密閉容器 6 ガス濃度検出調節器 7 循環ファン 8 希釈用ガス供給調節弁 9 反応ガス供給調節弁 10 入口ピンチロール 11 出口ピンチロール 12 排気処理設備 1 Fluorine gas treated product (treatment speed 10 m / min) 2 Corona discharge treated product (treatment speed 10 m / min) 3 Corona discharge treated product (treatment speed 30 m / min) 4 Foam sheet 5 Closed container 6 Gas concentration detection controller 7 Circulation fan 8 Dilution gas supply control valve 9 Reactive gas supply control valve 10 Inlet pinch roll 11 Outlet pinch roll 12 Exhaust treatment facility

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 樹脂発泡体を反応ガス雰囲気に曝すこと
を特徴とする樹脂発泡体の濡れ性改質方法。
1. A method for modifying the wettability of a resin foam, which comprises exposing the resin foam to a reaction gas atmosphere.
【請求項2】 反応ガスがハロゲン、二硫化炭素または
オゾンである請求項1記載の樹脂発泡体の濡れ性改質方
法。
2. The method for modifying the wettability of a resin foam according to claim 1, wherein the reaction gas is halogen, carbon disulfide or ozone.
JP2925992A 1992-02-17 1992-02-17 Method for modifying wettability of resin foam Pending JPH05222238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2925992A JPH05222238A (en) 1992-02-17 1992-02-17 Method for modifying wettability of resin foam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2925992A JPH05222238A (en) 1992-02-17 1992-02-17 Method for modifying wettability of resin foam

Publications (1)

Publication Number Publication Date
JPH05222238A true JPH05222238A (en) 1993-08-31

Family

ID=12271283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2925992A Pending JPH05222238A (en) 1992-02-17 1992-02-17 Method for modifying wettability of resin foam

Country Status (1)

Country Link
JP (1) JPH05222238A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021030177A (en) * 2019-08-28 2021-03-01 株式会社明電舎 Method for modifying porous material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021030177A (en) * 2019-08-28 2021-03-01 株式会社明電舎 Method for modifying porous material
WO2021038957A1 (en) * 2019-08-28 2021-03-04 株式会社明電舎 Reforming device and reforming method for porous material
US11512177B2 (en) 2019-08-28 2022-11-29 Meidensha Corporation Reforming device and reforming method for porous material

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