JP2543346B2 - Synthetic paper - Google Patents
Synthetic paperInfo
- Publication number
- JP2543346B2 JP2543346B2 JP61175375A JP17537586A JP2543346B2 JP 2543346 B2 JP2543346 B2 JP 2543346B2 JP 61175375 A JP61175375 A JP 61175375A JP 17537586 A JP17537586 A JP 17537586A JP 2543346 B2 JP2543346 B2 JP 2543346B2
- Authority
- JP
- Japan
- Prior art keywords
- aramid
- synthetic paper
- paper
- fibers
- pulp
- 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 - Fee Related
Links
Landscapes
- Paper (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、高強度、高剛性で、しかも耐熱性の優れた
合成紙に関する。TECHNICAL FIELD The present invention relates to a synthetic paper having high strength, high rigidity, and excellent heat resistance.
［従来の技術］ 近年、その高強度などの理由で、合成繊維から形成さ
れた合成紙が製造されている。特にアラミッド系繊維は
強い、軽い、伸びない等の特性があるため、これを原料
とする合成紙は注目されている。[Prior Art] In recent years, synthetic paper formed from synthetic fibers has been manufactured because of its high strength and the like. In particular, aramid fibers have properties such as strength, lightness, and non-stretchability, and therefore synthetic papers made from them are attracting attention.
［発明が解決しようとする課題］ アラミッド系繊維とパルプから製造された合成紙は、
繊維間の接着が繊維どうしの絡み合いだけによるため、
繊維の特性が活かしきれず、強度的に不十分であり、問
題があった。[Problems to be Solved by the Invention] Synthetic paper manufactured from aramid fibers and pulp is
Because the adhesion between fibers is only due to the entanglement of fibers,
There was a problem that the characteristics of the fiber could not be fully utilized and the strength was insufficient.
本発明は、繊維間の絡み合いが強く、強度および剛性
が高い合成紙を提供することを目的とする。An object of the present invention is to provide a synthetic paper in which the entanglement between fibers is strong and the strength and rigidity are high.
［課題を解決するための手段］ 上記の目的は、少なくともアラミッド系繊維、アラミ
ッド系パルプ、および芳香族ポリエステル系液晶ポリマ
ーの熱可塑性ミクロフィブリルから製紙されてなる合成
紙により、達成される。[Means for Solving the Problems] The above object is achieved by a synthetic paper made from at least aramid fibers, aramid pulp, and thermoplastic microfibrils of an aromatic polyester liquid crystal polymer.
本発明におけるアラミッドとは、芳香族ジカルボン酸
および／またはその酸クロライドと芳香族ジアミンを主
成分とするホモポリマーおよび／またはコポリマーであ
る。芳香族ジカルボン酸および芳香族ジアミンの各々
は、メタ体とパラ体を取り得るが、特に共にパラ体であ
るものが好ましい。The aramid in the present invention is a homopolymer and / or copolymer mainly composed of an aromatic dicarboxylic acid and / or its acid chloride and an aromatic diamine. Each of the aromatic dicarboxylic acid and the aromatic diamine can take a meta form and a para form, but it is particularly preferable that both are para forms.
本発明におけるアラミッド系繊維の繊維長は、２〜15
mmであると分散が均一になり、しかも繊維の絡みによっ
て高い強度を示すので、この繊維長が好ましい。The fiber length of the aramid fiber in the present invention is 2 to 15
The length of mm is preferable because the dispersion becomes uniform and the fiber is entangled to show high strength.
本発明におけるアラミッド系パルプとは、前記したポ
リマーからなるパルプであり、具体的には、繊維フィブ
リル化物やフィブリッドが好ましい。アラミッド系繊維
フィブリル化物とは、アラミッド系繊維を摩砕して発生
させたフィブリルをいう。アラミッド系フィブリッドと
は、アラミッドポリマー溶液から特殊な条件下で凝固析
出させた比表面積の大きい繊維フィブリルや粒子をい
う。このアラミッド系パルプは、バインダーとして作用
し、アラミッド系繊維どうしの絡み合いを促進する。こ
のため、パルプは0.5〜8mm長で、平均２〜6mm長程度で
あるのが好ましい。The aramid-based pulp in the present invention is a pulp made of the above-mentioned polymer, and specifically, a fiber fibrillated product or a fibrid is preferable. The aramid-based fiber fibrillated material means fibrils generated by grinding aramid-based fibers. The aramid-based fibrids refer to fiber fibrils and particles having a large specific surface area which are coagulated and precipitated from an aramid polymer solution under special conditions. The aramid-based pulp acts as a binder and promotes the entanglement of the aramid-based fibers. For this reason, it is preferable that the pulp has a length of 0.5 to 8 mm, and an average length of about 2 to 6 mm.
本発明における熱可塑性ミクロフィブリルは芳香族ポ
リエステル系液晶ポリマーから形成される。製紙の際、
加熱加圧処理によって軟化あるいは溶融融着し、バイン
ダー効果を発現させ、合成紙の緻密性を向上させる。得
られる合成紙は、構成成分であるアラミッド系繊維とア
ラミッド系パルプが本来有している強度および耐熱性が
活かされたものとなる。また、芳香族ポリエステル（例
えば、ヘキスト・セラニーズ社製“ベクトラ”）は、熱
可塑性液晶ポリマーの中では特にミクロフィブリル化し
易いポリマーである。The thermoplastic microfibril of the present invention is formed from an aromatic polyester liquid crystal polymer. When making paper
It is softened or melted and fused by the heat and pressure treatment to develop the binder effect and improve the denseness of the synthetic paper. The resulting synthetic paper makes use of the inherent strength and heat resistance of the constituent aramid fibers and aramid pulp. Aromatic polyester (for example, "Vectra" manufactured by Hoechst Celanese Co., Ltd.) is a polymer which is particularly easily microfibrillated among thermoplastic liquid crystal polymers.
この熱可塑性液晶ポリマーのミクロフィブリルは、長
さ0.5〜20mmであると、分散が均一になるため好まし
い。またフィブリル径は0.05〜0.5μであると、少量で
バインダー効果がでるため好ましい。It is preferable that the length of the microfibril of the thermoplastic liquid crystal polymer is 0.5 to 20 mm because the dispersion becomes uniform. Further, it is preferable that the fibril diameter is 0.05 to 0.5 μm because a binder effect can be obtained with a small amount.
熱可塑性ミクロフィブリルの製造については、本願と
同日に特許出願された「熱可塑性液晶ポリマーミクロフ
ィブリッドの製造法」（発明者：名小路晶輝、小坂田
篤）の詳述されている。The production of thermoplastic microfibrils is described in detail in "Method for producing thermoplastic liquid crystal polymer microfibrils" filed on the same day as the present application (inventor: Akiki Naokoji, Atsushi Kosakada).
本発明の合成紙を形成するアラミッド系繊維とアラミ
ッド系パルプの混合割合は、30:70〜70:30（重量比）で
あるのが、強度の点で好ましい。該繊維が70重量％より
多くなると製紙され難く、また30重量％より少なくなる
と強度が低下するため好ましくない。また、熱可塑性ミ
クロフィブリルの、アラミッド系繊維とアラミッド系パ
ルプの合計量に対する混合割合は、合成紙の用途によっ
て決めるのが好ましい。この混合割合は５〜95重量％で
あるのが好ましい。合成紙表面の平滑性、緻密性の改善
のみを目的とする場合は、熱可塑性ミクロフィブリルを
２重量％以上添加すれば効果がある。しかし、合成紙を
加熱加圧して非平面形状を得る目的の場合は、熱可塑性
ミクロフィブリルを５〜95重量％配合するのが好まし
い。The mixing ratio of the aramid-based fibers and the aramid-based pulp forming the synthetic paper of the present invention is preferably 30:70 to 70:30 (weight ratio) from the viewpoint of strength. When the amount of the fibers is more than 70% by weight, it is difficult to make paper, and when the amount of the fibers is less than 30% by weight, the strength is lowered, which is not preferable. Further, the mixing ratio of the thermoplastic microfibrils to the total amount of the aramid fiber and the aramid pulp is preferably determined depending on the use of the synthetic paper. The mixing ratio is preferably 5 to 95% by weight. For the purpose of only improving the smoothness and denseness of the surface of the synthetic paper, it is effective to add 2% by weight or more of thermoplastic microfibrils. However, for the purpose of heating and pressing synthetic paper to obtain a non-planar shape, it is preferable to add 5 to 95% by weight of thermoplastic microfibrils.
また、本発明の合成紙は他の抄紙補助薬品が適当量添
加されていても良い。Further, the synthetic paper of the present invention may contain other papermaking auxiliary chemicals in an appropriate amount.
本発明の合成紙の製造法は特に限定されないが、例え
ば次の方法がある。The method for producing the synthetic paper of the present invention is not particularly limited, but for example, the following method is available.
アラミッド系繊維とアラミッド系パルプと熱可塑性ミ
クロフィブリルを水性スラリー化した後、抄造し、乾燥
し、さらに加熱加圧処理を行って合成紙を得る。加熱加
圧処理を行うことによって緻密性と強度が向上する。Aramid fibers, aramid pulp, and thermoplastic microfibrils are made into an aqueous slurry, which is then made into paper, dried, and heated and pressed to obtain synthetic paper. The heat and pressure treatment improves the compactness and strength.
熱可塑性ミクロフィブリルを水分散させるためには、
通常の製紙技術で用いられるパルパー、リファイナー、
ビーター等の分散・叩解機を使用できるが、水和性が乏
しく水と分解沈降する傾向が大きいので、連続して撹
拌、流動させるのが好ましい。これをアラミッド系繊維
およびアラミッド系パルプの水性スラリーと混合した後
も、撹拌、流動させるのが好ましい。抄造には通常の製
紙技術で用いられる長網、短網、円網、傾斜ワイヤー等
の抄紙機を使用できる。乾燥にも通常の円筒型ドライヤ
ー、スルードライヤー等を使用できる。To disperse the thermoplastic microfibrils in water,
Pulper, refiner, used in normal papermaking technology
A disperser / beater such as a beater can be used, but it is preferably stirred and fluidized continuously because it has a low hydration property and tends to decompose and settle with water. After mixing with the aqueous slurry of aramid fibers and aramid pulp, it is preferable to stir and fluidize the mixture. For papermaking, a paper machine such as a Fourdrinier, a shortdrain, a cylinder, and a slanted wire, which are used in ordinary papermaking techniques, can be used. An ordinary cylindrical dryer, a through dryer or the like can be used for drying.
合成紙の加熱加圧処理は、温度180〜320℃、圧力７〜
200kg/cm2で行う。The heat and pressure treatment of synthetic paper is performed at a temperature of 180-320 ℃ and a pressure of 7-
Perform at 200 kg / cm 2 .
［実施例］ 本発明を実施例によりさらに具体的に説明する。[Examples] The present invention will be described more specifically with reference to Examples.
実施例１ 1.5デニール、6mm長のアラミッド系繊維（デュポン社製
一ケブラー 29"および径12μ、平均長4mmのアラミッド
系パルプ（デュポン社製“ケプラー 979"）を各々45
部、フィブリル化した5mm長、径0.05〜0.5μ（平均0.2
μ）の芳香族ポリエステル系液晶ポリマー（ヘキスト・
セラニーズ社製“ベクトラ”）10部を卓上型ビーターで
水に分散させてから、フォームレスPZ（明成化学（株）
製、消泡剤）の0.5重量％（紙原料に対し）とともに混
合し、固形分濃度0.2％に調整し、濾水性の調整を目的
として、ポリアミド、エピクロルヒドリン樹脂を固形分
の１％添加した。さらに、アルコックス（明成化学
（株）製、アニオン性粘度調整剤）の0.4重量％（紙原
料に対し）を添加混合して、標準手漉き装置を用いて重
さ100g/m2の手漉き紙を得た。Example 1 1.5 denier, 6 mm long aramid fiber (manufactured by DuPont)
One kevlar 29 "and 12μ in diameter, 4mm average length aramid
System pulp ("Kewpler" manufactured by DuPont) 979 ") 45 each
Part, fibrillated 5 mm length, diameter 0.05-0.5 μ (average 0.2
μ) aromatic polyester liquid crystal polymer (Hoechst
10 units of "Bectra" made by Celanese Co. Ltd. with a tabletop beater
Formless PZ (Meisei Chemical Co., Ltd.) after dispersing in water
0.5% by weight (based on paper raw material) of
Combined to adjust the solids concentration to 0.2% and to adjust drainage
Polyamide and epichlorohydrin resin as solid content
1% was added. In addition, Alcox (Meisei Chemical
0.4% by weight of anionic viscosity modifier manufactured by K.K.
(For each ingredient) and mix and weigh using a standard handmade device.
100 g / m2Got the handmade paper.
得られた紙を、平板金型付きテストプレスを用い、30
0℃、50kg/cm2にて0.5分プレスして合成紙を得た。Using a test press with a flat plate die, the resulting paper is
It was pressed at 0 ° C. and 50 kg / cm 2 for 0.5 minutes to obtain a synthetic paper.
実施例２ アラミッド系繊維25部、アラミッド系パルプ25部、フ
ィブリル化“ベクトラ"50部を用いたこと以外は実施例
１と同様にして、合成紙を得た。Example 2 A synthetic paper was obtained in the same manner as in Example 1 except that 25 parts of aramid fibers, 25 parts of aramid pulp, and 50 parts of fibrillated "Vectra" were used.
比較例１ フィブリル化“ベクトラ”を用いないこと以外は実施
例１と同様にして、合成紙を得た。Comparative Example 1 A synthetic paper was obtained in the same manner as in Example 1 except that the fibrillated "Vectra" was not used.
実施例１、２および比較例１で得られた合成紙の物性
を測定した結果を次の表に示す。（表中で「熱処理」と
あるのは、加熱加圧処理を意味する。） 実施例３ フィブリル化“ベクトラ”の量を５部にした以外は実
施例１と同様にして、合成紙を製造した。この合成紙は
ブンゼンバーナーの炎に接しても炎を発して燃え上がる
ことはなく、またバーナーから離すと直ちに自己消火し
た。The results of measuring the physical properties of the synthetic papers obtained in Examples 1 and 2 and Comparative Example 1 are shown in the following table. (In the table, "heat treatment" means heat and pressure treatment.) Example 3 A synthetic paper was produced in the same manner as in Example 1 except that the amount of fibrillated "Vectra" was changed to 5 parts. The synthetic paper did not ignite and burn when exposed to the Bunsen burner flame, and immediately extinguished itself when removed from the burner.
比較例２ フィブリル化“ベクトラ”の代わりにミクロフィブリ
ル化されたセルロース繊維（ダイセル化学（株）製“MF
C"）を使用した以外は実施例２と同様にして、合成紙を
製造した。Comparative Example 2 Cellulose fibers microfibrillated in place of fibrillated "Vectra"("MF manufactured by Daicel Chemical Co., Ltd."
A synthetic paper was produced in the same manner as in Example 2 except that C ") was used.
この合成紙は、実施例２の合成紙と裂断長はほぼ同等
であったが、自己消化性がなく、ブンゼンバーナーの炎
から離しても燃焼を継続した。Although this synthetic paper had a breaking length almost equal to that of the synthetic paper of Example 2, it had no self-extinguishing property and continued to burn even if it was separated from the Bunsen burner flame.
比較例３ フィブリル化“ベクトラ"5gと水１リットルをミキサ
ーに入れ、１分間撹拌し、標準型手漉き機により坪量20
0g/m2の合成紙を得た。この合成紙を表面温度110℃のド
ラム型ドライヤーに貼り付けて乾燥させたが、折り曲げ
ると切断するほど極めて脆く、引張り強度の測定は困難
であった。Comparative Example 3 5 g of fibrillated "Vectra" and 1 liter of water were placed in a mixer and stirred for 1 minute, and the basis weight was 20 using a standard handmade machine.
0 g / m 2 of synthetic paper was obtained. This synthetic paper was attached to a drum type dryer having a surface temperature of 110 ° C. and dried, but when it was bent, it was extremely brittle as it was cut, and it was difficult to measure the tensile strength.
この乾燥した紙を２枚の平板金型の間に挟み、300
℃、50kg/cm2にて0.5分間プレスした。プレス後の紙は
平滑で可撓性があった。またその密度は1.03g/cm3、裂
断長は1.3kmであった。Insert this dried paper between two flat plate molds and
It was pressed at 50 ° C. and 50 kg / cm 2 for 0.5 minutes. The paper after pressing was smooth and flexible. The density was 1.03 g / cm 3 and the breaking length was 1.3 km.
［発明の効果］ 本発明の合成紙は、芳香族ポリエステル系液晶ポリマ
ーからなる熱可塑性ミクロフィブリルが配合されている
ため、アラミッド系繊維とアラミッド系パルプの絡み合
いが緻密になり、これらが本来有している高強度性を活
かすことができる。EFFECTS OF THE INVENTION Since the synthetic paper of the present invention contains thermoplastic microfibrils composed of an aromatic polyester-based liquid crystal polymer, the entanglement of aramid fibers and aramid pulp becomes dense, and these inherently have these. It can take advantage of its high strength.
また、本発明の合成紙は、アラミッド系繊維とアラミ
ッド系パルプが配合されているため、自己消火性も優れ
ている。Further, the synthetic paper of the present invention is excellent in self-extinguishing property because it contains aramid fibers and aramid pulp.
本発明の合成紙は、例えば電気絶縁紙、アスベスト代
替品として、あるいは他の材料でコーティングしたり、
貼り合わせたり、特殊形状物や型にしたりして、加工部
品として用いることができる。The synthetic papers of the present invention can be used, for example, as electrical insulating papers, asbestos substitutes, or coated with other materials,
It can be pasted or formed into a special shape or mold to be used as a processed part.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−209100（ＪＰ，Ａ) 特開 昭60−81399（ＪＰ，Ａ) 特開 昭55−67100（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-209100 (JP, A) JP-A-60-81399 (JP, A) JP-A-55-67100 (JP, A)
Claims (1)
さ0.5〜8mmのアラミッド系パルプと、芳香族ポリエステ
ル系液晶ポリマーからなり長さ0.5〜20mm、フィブリル
径0.05〜0.5μの熱可塑性ミクロフィブリルとを主成分
とし、アラミッド系繊維とアラミッド系パルプの混合割
合（重量比）を30:70〜70:30として製紙され、温度180
〜320℃、圧力７〜200kg/cm2の条件下で加熱加圧処理さ
れてなる合成紙。1. A thermoplastic material comprising aramid fibers having a fiber length of 2 to 15 mm, aramid pulp having a length of 0.5 to 8 mm, and aromatic polyester liquid crystal polymer, having a length of 0.5 to 20 mm and a fibril diameter of 0.05 to 0.5 μ. Mainly composed of microfibrils, paper is produced at a mixing ratio (weight ratio) of aramid fibers and aramid pulp of 30:70 to 70:30 and a temperature of 180.
Synthetic paper heat-pressed under conditions of ~ 320 ° C and pressure of 7-200kg / cm 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61175375A JP2543346B2 (en) | 1986-07-25 | 1986-07-25 | Synthetic paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61175375A JP2543346B2 (en) | 1986-07-25 | 1986-07-25 | Synthetic paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6335900A JPS6335900A (en) | 1988-02-16 |
| JP2543346B2 true JP2543346B2 (en) | 1996-10-16 |
Family
ID=15995001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61175375A Expired - Fee Related JP2543346B2 (en) | 1986-07-25 | 1986-07-25 | Synthetic paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543346B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02115458A (en) * | 1988-10-25 | 1990-04-27 | Yukio Yanagisawa | Extension construction for basement |
| US5609220A (en) * | 1992-08-27 | 1997-03-11 | Kabushiki Kaisha Komatsu Seisakusho | Operation control system for traveling vehicle |
| WO2002025010A1 (en) * | 2000-09-20 | 2002-03-28 | Shin-Kobe Electric Machinery Co., Ltd. | Nonwoven fabric for electrical insulation, prepreg, and laminate |
| JP7252435B2 (en) * | 2018-10-24 | 2023-04-05 | オリベスト株式会社 | Method for producing low-density fiber paper containing hydrophobic nanofibers |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279979A (en) * | 1978-11-09 | 1981-07-21 | The Dexter Corporation | Nonwoven fibrous substrate for battery separator |
| JPS6081399A (en) * | 1983-10-04 | 1985-05-09 | 三菱電機株式会社 | Inorganic paper |
| BR8501096A (en) * | 1984-03-14 | 1985-11-05 | Du Pont | PERFECT PRESSED CARD AND PROCESS FOR ITS PREPARATION |
-
1986
- 1986-07-25 JP JP61175375A patent/JP2543346B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6335900A (en) | 1988-02-16 |
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