JPS6124985B2 - - Google Patents

Info

Publication number
JPS6124985B2
JPS6124985B2 JP55007250A JP725080A JPS6124985B2 JP S6124985 B2 JPS6124985 B2 JP S6124985B2 JP 55007250 A JP55007250 A JP 55007250A JP 725080 A JP725080 A JP 725080A JP S6124985 B2 JPS6124985 B2 JP S6124985B2
Authority
JP
Japan
Prior art keywords
cylindrical
fabric
polyurethane elastomer
cylindrical fabric
elastomer
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
Application number
JP55007250A
Other languages
Japanese (ja)
Other versions
JPS56104044A (en
Inventor
Hironobu Furusawa
Tsuyoshi Hachitsuka
Masao Hirayama
Tamotsu Yamanaka
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.)
Ashimori Industry Co Ltd
Toyobo Co Ltd
Original Assignee
Ashimori Industry Co Ltd
Toyobo 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 Ashimori Industry Co Ltd, Toyobo Co Ltd filed Critical Ashimori Industry Co Ltd
Priority to JP725080A priority Critical patent/JPS56104044A/en
Publication of JPS56104044A publication Critical patent/JPS56104044A/en
Publication of JPS6124985B2 publication Critical patent/JPS6124985B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B29C48/152—Coating hollow articles the inner surfaces thereof
    • B29C48/153—Coating both inner and outer surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0063—Cutting longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Belt Conveyors (AREA)
  • Moulding By Coating Moulds (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 本発明は、ベルトコンベアやフレキシブルコン
テナ等に使用される布補強エラストマーシート、
特に直接食品に接触するような用途に用いられる
のに適して前記シートを製造する方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides cloth-reinforced elastomer sheets used for belt conveyors, flexible containers, etc.
In particular, the present invention relates to a method of manufacturing the sheet suitable for use in applications such as direct contact with food.

従来、一般にこの種のシートはゴムや軟質のポ
リ塩化ビニル樹脂などが用いられることが多かつ
た。しかしながらこれらの素材は、可塑剤や安定
剤等の配合薬品が多量に含まれており、これらの
素材から製造されたシートが食品に接触すると、
前記配合薬品が食品に移行することがあり、衛生
上好ましくない。又、ナイロンやポリエチレン等
の熱可塑性合成樹脂を使用することも検討された
が、これらの合成樹脂は柔軟性に欠け、コンベア
ベルトやフレキシブルコンテナ用のシートとして
適していない。 Conventionally, this type of sheet has generally been made of rubber or soft polyvinyl chloride resin. However, these materials contain large amounts of compounded chemicals such as plasticizers and stabilizers, and when sheets made from these materials come into contact with food,
The above-mentioned compounded chemicals may migrate into food, which is unfavorable from a sanitary standpoint. The use of thermoplastic synthetic resins such as nylon and polyethylene has also been considered, but these synthetic resins lack flexibility and are not suitable as sheets for conveyor belts or flexible containers.

そこで本発明者等は、特に食品運搬用として衛
生的であり、且つすぐれた物性を有するコンベア
ベルトやフレキシブルコンテナ用のシートを経済
的に供給するために鋭意研究を進めた結果、本発
明に到達したものである。すなわち、本発明は、
主としてポリアミド系合成繊維からなる糸条を筒
状に織成又は編組してなる筒状布帛を接着剤で処
理することなく、押出機ヘツド中に連続的に供給
しつつ、その外周にポリウレタンエラストマーの
溶融物を供給し、これを前記筒状布帛の外面に圧
着して該ポリウレタンエラストマー溶融物による
外面被覆層を形成すると共に、ポリウレタンエラ
ストマー溶融物の一部を前記筒状布帛の繊維の間
隙を通して筒状布帛の内面へ侵入せしめ、これを
該筒状布帛の内面に圧着して該ポリウレタンエラ
ストマー溶融物による内面被覆層を形成して、筒
状布帛の内外両面にポリウレタンエラストマーの
被覆層を有し且つ該被覆層が前記筒状布帛の繊維
の間隙を通して一体化した筒状積層体を形成し、
次いで該筒状積層体を切り開き、熱プレスにより
幅方向の彎曲を除去することを特徴とする布補強
エラストマーシートの製造方法である。 Therefore, the present inventors conducted extensive research in order to economically supply sheets for conveyor belts and flexible containers that are hygienic and have excellent physical properties, especially for food transportation, and as a result, they arrived at the present invention. This is what I did. That is, the present invention
A cylindrical fabric made by weaving or braiding threads mainly made of polyamide synthetic fibers into a cylindrical shape is continuously fed into the extruder head without being treated with an adhesive, and a polyurethane elastomer is applied to the outer periphery of the fabric. A melt is supplied and pressed onto the outer surface of the cylindrical fabric to form an outer surface coating layer of the molten polyurethane elastomer, and a portion of the molten polyurethane elastomer is passed through the gaps between the fibers of the cylindrical fabric into the cylindrical fabric. The polyurethane elastomer melt is applied to the inner surface of the cylindrical fabric, and is pressed onto the inner surface of the cylindrical fabric to form an inner surface coating layer of the molten polyurethane elastomer, so that the cylindrical fabric has a polyurethane elastomer coating layer on both the inner and outer surfaces of the cylindrical fabric. forming a cylindrical laminate in which the coating layer is integrated through gaps between the fibers of the cylindrical fabric;
This method of manufacturing a cloth-reinforced elastomer sheet is characterized in that the cylindrical laminate is then cut open and the curvature in the width direction is removed by hot pressing.

以下本発明を図面に従つて詳細に説明すると、
第１図は本発明の実施例を示すものである。１は
ポリアミド系合成繊維のたて糸及びよこ糸を筒状
に織成した筒状布帛であつて、押出機２のヘツド
３を後方から前方へ向つて貫通している。筒状布
帛１には、接着剤等の処理は施こされていない。
ヘツド３は第２図に示す如きものであつて、ヘツ
ド本体４とマンドレル５よりなり、その本体４と
マンドレル５との間隙を前記筒状布帛１が連続的
に通過するようになつている。ヘツド本体４は、
合成樹脂圧入口６を有する筒体７内に多数の孔８
を環状に穿設した鍔部９を有する円錘台体１０が
嵌合されており、前記合成樹脂圧入口から孔８を
経て円錘台体１０の外側を通り筒状布帛１の外表
面に到る合成樹脂流路が形成されており、筒体７
の先端に嵌合された外層ダイチツプ１１の先端部
で筒状布帛の外周に前記合成樹脂を被覆するよう
になつている。 The present invention will be explained in detail below with reference to the drawings.
FIG. 1 shows an embodiment of the invention. A cylindrical fabric 1 is made by weaving warp and weft yarns of polyamide synthetic fibers into a cylindrical shape, and passes through the head 3 of the extruder 2 from the rear to the front. The tubular fabric 1 is not treated with adhesive or the like.
The head 3 is as shown in FIG. 2, and consists of a head body 4 and a mandrel 5, through which the tubular fabric 1 passes continuously through the gap between the head body 4 and the mandrel 5. The head body 4 is
A large number of holes 8 are provided in a cylinder 7 having a synthetic resin injection port 6.
A conical body 10 having a flange 9 formed in an annular manner is fitted into the conical body 10 , and a conical body 10 is fitted into the conical body 10 , and passes from the synthetic resin injection port through the hole 8 to the outside of the conical body 10 and onto the outer surface of the cylindrical fabric 1 . A synthetic resin flow path is formed, and the cylindrical body 7
The outer periphery of the cylindrical fabric is coated with the synthetic resin at the tip of the outer layer die chip 11 fitted to the tip of the cylindrical fabric.

マンドレル５は前記筒状布帛１の内径にほゞ一
致した外径の丸棒１２の先端に、前記合成樹脂流
路に対向する位置に多数の長孔１３を有する環体
１４と、該環体１４の内側に間隙を置いて設けら
れた内層ダイチツプ１５とが取りつけられてい
る。而して、前記長孔１３から環体１４とダイチ
ツプ１５との間を通り、環体１４の先端において
筒状布帛１の内面に到る合成樹脂流路が形成さ
れ、内層ダイチツプ１５の先端で筒状布帛１の内
周に前記合成樹脂を被覆するようになつている。
なお、マンドレル５は、シヤフト１９を介して後
方において適当な方法で支持されている。 The mandrel 5 includes a ring body 14 having a large number of elongated holes 13 at a position facing the synthetic resin flow path at the tip of a round bar 12 having an outer diameter substantially matching the inner diameter of the cylindrical fabric 1, and the ring body. An inner layer die chip 15 is attached to the inside of the die chip 14 with a gap therebetween. Thus, a synthetic resin channel is formed that passes from the elongated hole 13 between the ring body 14 and the die chip 15 and reaches the inner surface of the cylindrical fabric 1 at the tip of the ring body 14. The inner periphery of the cylindrical fabric 1 is coated with the synthetic resin.
Note that the mandrel 5 is supported at the rear via a shaft 19 in a suitable manner.

本発明においては、合成樹脂として、熱可塑性
ポリウレタンエラストマーを使用する。該ポリウ
レタンエラストマーの溶融物１６は、押出機２か
ら押出され、合成樹脂圧入口６からヘツド３内へ
圧入される。そして該ポリウレタンエラストマー
の溶融物１６は孔８を通り、円錘台体１０と外層
ダイチツプ１１との間を通つて筒状布帛１の外面
に供給され、その溶融物の一部は直接筒状布帛１
の表面に圧着被覆され、筒状布帛１と共に押出さ
れて外面被覆層１７を形成する。又前記溶融物１
６の残余の部分は、筒状布帛１の繊維の間隙を貫
通し、長孔１３を通つて環体１４内に進入し、環
体１４と内層ダイチツプ１５との間を通つて前記
環体１４の先端において溶融状態のまゝで筒状布
帛１の内面に供給され、圧着されて筒状布帛１の
内面被覆層１８を形成する。このようにして得ら
れた筒状積層体２０は、前記筒状布帛１の内外両
面に前記ポリウレタンエラストマーの被覆層１
７，１８が形成され、且つこれら被覆層１７，１
８は前記筒状布帛１の繊維の間隙を通して一体的
に結合されている。 In the present invention, a thermoplastic polyurethane elastomer is used as the synthetic resin. The polyurethane elastomer melt 16 is extruded from the extruder 2 and forced into the head 3 through the synthetic resin injection port 6. Then, the melt 16 of the polyurethane elastomer passes through the hole 8, passes between the conical body 10 and the outer die chip 11, and is supplied to the outer surface of the cylindrical fabric 1, and a part of the molten substance is directly supplied to the cylindrical fabric. 1
The outer surface coating layer 17 is formed by being pressure-bonded and extruded together with the cylindrical fabric 1 . Further, the melt 1
The remaining portion of the ring 6 penetrates the gap between the fibers of the cylindrical fabric 1, enters the ring body 14 through the elongated hole 13, passes between the ring body 14 and the inner die chip 15, and enters the ring body 14. It is supplied in a molten state to the inner surface of the cylindrical fabric 1 at the tip thereof, and is crimped to form the inner surface coating layer 18 of the cylindrical fabric 1. The thus obtained cylindrical laminate 20 has a coating layer 1 of the polyurethane elastomer on both the inner and outer surfaces of the cylindrical fabric 1.
7, 18 are formed, and these coating layers 17, 1
8 are integrally connected through gaps between the fibers of the cylindrical fabric 1.

この筒状積層体２０は、ヘツド３を出た後、ナ
イフ２１によつてその長さ方向に切り開かれる。
第１図においては、ヘツド３から出た筒状積層体
２０が直ちにナイフ２１によつて切り開かれる如
く示されているが、ヘツド３から出た筒状積層体
２０を一旦そのまゝ巻き取り、その後別工程で切
り開いてもよい。切り開かれた積層体は、ニツプ
ローラー２２によつて平らなシート２０′状に拡
げられ、引き取り装置２３によつて引き取られ
る。引き取られたシート２０′は、前記筒状積層
体２０の時のくせが残つており、円筒状に復帰し
ようとする傾向があるので、これを熱プレスロー
ラー２４に通し、前記くせを除去して平板状とし
た後、巻取り装置２５にコイル状に巻取る。前記
くせを除去するには、前記熱プレスローラー２２
４に限らず、板状熱プレスその他の適当な手段を
用いてもよく、又、熱プレスローラーを引き取り
装置２３と兼ねることも可能である。得られたベ
ルトは更に必要に応じて弗素樹脂、シリコン樹脂
等により表面処理することもできる。 After the cylindrical laminate 20 leaves the head 3, it is cut open along its length by a knife 21.
In FIG. 1, the cylindrical laminate 20 coming out of the head 3 is shown to be immediately cut open by the knife 21, but once the cylindrical laminate 20 coming out of the head 3 is wound up as it is, It may then be cut open in a separate process. The cut-out laminate is spread out into a flat sheet 20' by a nip roller 22 and taken off by a take-off device 23. The sheet 20' that has been taken up still has the curls from the cylindrical laminate 20 and tends to return to its cylindrical shape, so it is passed through a hot press roller 24 to remove the curls. After forming it into a flat plate shape, it is wound into a coil shape by a winding device 25. To remove the curl, use the hot press roller 22.
4, a plate-shaped heat press or other suitable means may be used, and the heat press roller may also serve as the take-off device 23. The obtained belt can also be further surface-treated with a fluororesin, silicone resin, etc., if necessary.

本発明においては、シートの両面の被覆層に
は、ポリウレタンエラストマーが使用される。ポ
リウレタンエラストマーは、熱可塑性であつて、
熱成型性を有し、且つ柔軟でゴム状弾性を有して
おり、又適度の強度と伸びとを有し、化学的に安
定であつて、油、熱、光、オゾン等に対してよく
耐えるものであり、しかも優れた引裂強力、耐屈
曲摩耗性、寸法安定性を有し、その上−50〜100
℃の広い温度範囲で安定した性能を発揮する。従
つてコンベアベルトやフレキシブルコンテナ用の
エラストマーシートの素材として、極めて好適で
ある。さらに、ポリウレタンエラストマーは、一
般に油類で膨潤することがきわめて少く、また耐
摩耗性に関して抜群の性能を有するので、特に耐
摩耗性が要求されるような用途に適する。 In the present invention, polyurethane elastomer is used for the coating layers on both sides of the sheet. Polyurethane elastomer is thermoplastic and
It has thermoformability, is flexible and has rubber-like elasticity, has appropriate strength and elongation, is chemically stable, and is resistant to oil, heat, light, ozone, etc. In addition, it has excellent tear strength, bending abrasion resistance, and dimensional stability, and -50 to 100
Demonstrates stable performance over a wide temperature range of ℃. Therefore, it is extremely suitable as a material for elastomer sheets for conveyor belts and flexible containers. Furthermore, polyurethane elastomers are generally very unlikely to swell with oils and have outstanding performance in terms of abrasion resistance, so they are particularly suitable for applications where abrasion resistance is required.

本発明において用いられるポリウレタンエラス
トマーとしては、Ｐ−フエニレンジイソシアネー
ト、ｍ−フエレンジイソシアネート、４，4′−ジ
フエニルメタンジイソシアネート、４，4′−イソ
プロピリデンジフエニルジイソシアネートのよう
な有機ポリイソシアネートと、分子量400〜5000
のポリエチレンエーテルグリコール、ポリプロピ
レンエーテルグリコール、ポリブチレンエーテル
グリコール、ポリカプロラクトンジオール、ポリ
エチレンアジペートジオール、ポリブチレンアジ
ペートジオール、ポリブチレンセバケートジオー
ルのような高分子量ジオールおよびエチレングリ
コール、プロピレングリコール、ブチレングリコ
ール、ヘキサメチレングリコールのような低分子
量ジオールから得られるポリウレタンエラストマ
ーが特に好ましい。高分子量ジオール成分の含有
量は50〜90重量％が好ましく、特に65〜85重量％
が適当である。 The polyurethane elastomer used in the present invention includes organic polyisocyanates such as P-phenylene diisocyanate, m-phenylene diisocyanate, 4,4'-diphenylmethane diisocyanate, and 4,4'-isopropylidene diphenyl diisocyanate; Molecular weight 400-5000
High molecular weight diols such as polyethylene ether glycol, polypropylene ether glycol, polybutylene ether glycol, polycaprolactone diol, polyethylene adipate diol, polybutylene adipate diol, polybutylene sebacate diol and ethylene glycol, propylene glycol, butylene glycol, hexamethylene Particularly preferred are polyurethane elastomers derived from low molecular weight diols such as glycols. The content of the high molecular weight diol component is preferably 50 to 90% by weight, particularly 65 to 85% by weight.
is appropriate.

又、ポリウレタンエラストマーはポリエポキシ
化合物、ポリイソシアネート等を配合して弾性的
性質を一層改良することもできる。又、用途によ
つては、難燃剤、結晶化促進剤、有機又は無機充
填剤、安定剤、着色剤、導電剤等を配合すること
もできるが、食品に接触するような用途の場合に
は、当然のことながら無添加又はその添加量を最
少限とするのが好ましい。 Further, the elastic properties of the polyurethane elastomer can be further improved by blending polyepoxy compounds, polyisocyanates, etc. Also, depending on the application, flame retardants, crystallization promoters, organic or inorganic fillers, stabilizers, colorants, conductive agents, etc. may be added, but in the case of applications that come into contact with food. Of course, it is preferable that no additives be added or that the amount added be minimal.

一方本発明においては、補強層となる筒状布帛
は主としてポリアミド系合成繊維からなり、この
ポリアミド系合成繊維のフイラメント糸又は、ス
パン糸を織成又は編組したものである。この布帛
は、すべてポリアミド系合成繊維であつてもよ
く、あるいはポリエステル系又は、ポリビニルア
ルコール系の合成繊維や天然繊維と混用してもよ
いが、布帛中の全繊維量のうち少なくても半量は
ポリアミド系合成繊維とすべきである。又、用途
によつては、導電性繊維を少量混用することもで
きる。 On the other hand, in the present invention, the cylindrical fabric serving as the reinforcing layer is mainly made of polyamide synthetic fibers, and is woven or braided with filament yarns or spun yarns of the polyamide synthetic fibers. This fabric may be made entirely of polyamide-based synthetic fibers, or may be mixed with polyester-based or polyvinyl alcohol-based synthetic fibers or natural fibers, but at least half of the total amount of fibers in the fabric is It should be a polyamide-based synthetic fiber. Further, depending on the use, a small amount of conductive fiber may be mixed.

ポリアミド系繊維としては、ナイロン６、ナイ
ロン６，６、ナイロン６，10、ナイロン12、ナイ
ロン６，12のような脂肪族ポリアミド、ポリヘキ
サメチレンテレフタルアミド、キシレン基含有ポ
リアミドのような芳香族基含有ポリアミド、ケブ
ラー（Ｅ，Ｉ，Dupont社）のような全芳香族ポ
リアミド等からなる繊維が挙げられる。 Examples of polyamide fibers include aliphatic polyamides such as nylon 6, nylon 6,6, nylon 6,10, nylon 12, and nylon 6,12, aromatic group-containing polyamides such as polyhexamethylene terephthalamide, and xylene group-containing polyamides. Examples include fibers made of polyamide, wholly aromatic polyamide such as Kevlar (E,I, Dupont), and the like.

本発明においては、内外面の被覆層が、筒状布
帛の繊維の間隙を通して一体化しており、しかも
ポリウレタン系エラストマーとポリアミド系繊維
とは親和性に富むので、被覆層と筒状布帛とは接
着剤を使用しなくともきわめて強固に接着し得る
のである。 In the present invention, the inner and outer covering layers are integrated through the gaps between the fibers of the cylindrical fabric, and since the polyurethane elastomer and the polyamide fiber have high affinity, the covering layer and the cylindrical fabric are bonded together. Extremely strong adhesion can be achieved without using any adhesive.

一般にこの種の積層シートにあつては、エラス
トマー被覆層と繊維補強層とを接着剤を介して接
着するのが通例である。しかしながら、接着剤を
使用すると、接着剤中の成分がエラストマー被覆
層へ移行し、さらに表面にまで滲出してくるた
め、特に食品に接触する用途には衛生上問題であ
る。しかも、エラストマーや繊維にいかに優れた
ものを使用したとしても、接着剤の耐熱性、耐寒
性等の性能が劣れば、シート全体の性能は結局接
着剤の性能に支配されることとなり、充分に優れ
た性能を有するシートを得ることが困難となる。
特に耐熱性、耐寒性、耐油性、耐薬品性、柔軟性
等において、ポリウレタンエラストマーに匹敵す
る性能を有し、ポリウレタンエラストマーのこれ
らの性能を充分に発揮させ得るような接着剤は、
極めて少い。従つて、接着剤を使用せずにエラス
トマーと補強層とを接着するのが望ましいのであ
る。そのためには、ポリウレタンエラストマーと
ポリアミド系合成繊維との組み合わせが最も適し
ているのである。 Generally, in this type of laminated sheet, the elastomer coating layer and the fiber reinforced layer are usually bonded together with an adhesive. However, when an adhesive is used, components in the adhesive migrate to the elastomer coating layer and even ooze out to the surface, which is a hygiene problem, especially in applications that come into contact with food. Moreover, no matter how good the elastomer or fiber is, if the adhesive has poor performance such as heat resistance or cold resistance, the performance of the entire sheet will ultimately be controlled by the performance of the adhesive, and it will not be sufficient. It becomes difficult to obtain a sheet with excellent performance.
In particular, adhesives that have properties comparable to polyurethane elastomers in terms of heat resistance, cold resistance, oil resistance, chemical resistance, flexibility, etc., and that can fully demonstrate these properties of polyurethane elastomers, are:
Very few. Therefore, it is desirable to bond the elastomer and reinforcing layer without the use of adhesives. For this purpose, the combination of polyurethane elastomer and polyamide synthetic fiber is most suitable.

しかしながら、ポリウレタンエラストマーとポ
リアミド系合成繊維との組み合わせであれば、常
に良好な接着が得られるというものではない。例
えば、ポリアミド系合成繊維よりなる布帛上に押
出ラミネーシヨン法によりポリウレタンエラスト
マーを被覆した場合、ポリウレタンエラストマー
は一般に粘性が大きく布帛中に滲み込みにくく、
粘性を低くするために加工温度を高めると樹脂の
分解が始まるので結果的には充分な接着力が得ら
れない。又、布帛の両面に被覆した場合において
も、布帛の両面にエラストマーが付着するのみ
で、布帛の繊維の間隙を通してエラストマーが一
体化することがなく、充分に接着しないのであ
る。又、カレンダー加工によるラミネーシヨン法
においては、ロールへのポリウレタンエラストマ
ーの粘着性を防止するために滑剤を使用すること
が必要であり、この滑剤は布帛との接着性を阻害
するので接着剤を使用しないと事実上加工できな
い。上記の如き押出ラミネーシヨン法やカレンダ
ーラミネーシヨン法は、融点及び軟化点が低く、
軟化温度領域の広いポリ塩ビニル樹脂などにおい
ては適当であるが、本発明が対象とするポリウレ
タンエラストマーには適当な加工法とは言えな
い。 However, the combination of polyurethane elastomer and polyamide synthetic fiber does not always provide good adhesion. For example, when polyurethane elastomer is coated on a fabric made of polyamide synthetic fiber by extrusion lamination, polyurethane elastomer generally has a high viscosity and is difficult to seep into the fabric.
If the processing temperature is raised to lower the viscosity, the resin will begin to decompose, resulting in insufficient adhesive strength. Furthermore, even when both sides of the fabric are coated, the elastomer only adheres to both sides of the fabric, and the elastomer does not integrate through the gaps between the fibers of the fabric, resulting in insufficient adhesion. In addition, in the lamination method by calendering, it is necessary to use a lubricant to prevent the polyurethane elastomer from sticking to the roll, and since this lubricant inhibits the adhesion with the fabric, adhesives are not used. Otherwise, it is virtually impossible to process. The extrusion lamination method and calendar lamination method as described above have a low melting point and softening point,
Although this method is suitable for polyvinyl chloride resins having a wide softening temperature range, it cannot be said to be an appropriate processing method for polyurethane elastomers, which are the object of the present invention.

本発明においては、押出機のダイスの中でポリ
ウレタンエラストマーの溶融物が大きな圧力のも
とで筒状布帛と接触し、且つ該筒状布帛の繊維の
間隙を貫通するため、きわめて大きな接着力が得
られるのである。 In the present invention, the melted polyurethane elastomer comes into contact with the cylindrical fabric under great pressure in the die of the extruder, and penetrates through the gaps between the fibers of the cylindrical fabric, resulting in an extremely large adhesive force. You can get it.

実験の結果では、接着剤を使用することなく本
発明の方法により製造したシートにあつては、筒
状布帛とエラストマー被覆層との接着力は、約５
Kg／cmであつた。対比のために同じ条件でポリエ
ステルの筒状布帛を使用したものについて試験し
た結果は、接着力は約２Kg／cmに過ぎず、筒状布
帛とエラストマーとの材質により大きな差が生じ
ており、従つて単なる投錨効果の他にポリアミド
とポリウレタンとのぬれ効果も生じていることが
理解できる。又、ポリアミド系合成繊維の布帛に
カレンダーラミネーシヨン法又は押出ラミネーシ
ヨン法によりポリウレタンエラストマーを被覆し
たものにあつては、接着力はいずれも１Kg／cm以
下であつて、本発明の素材及び加工法を組み合わ
せることによりはじめて上述の如き良好な接着力
が得られるものである。 According to the experimental results, in the case of a sheet produced by the method of the present invention without using an adhesive, the adhesive force between the cylindrical fabric and the elastomer coating layer is approximately 5.
It was Kg/cm. For comparison, a test using a polyester cylindrical fabric under the same conditions showed that the adhesive strength was only about 2 kg/cm, and there was a large difference depending on the material of the cylindrical fabric and elastomer. Therefore, it can be seen that in addition to the simple anchoring effect, there is also a wetting effect between the polyamide and polyurethane. Furthermore, in the case of polyamide-based synthetic fiber cloth coated with polyurethane elastomer by calendar lamination method or extrusion lamination method, the adhesive strength is 1 kg/cm or less in any case, and the material and processing method of the present invention Good adhesive strength as described above can only be obtained by combining the above.

なお、本発明における加工温度は、ポリウレタ
ンエラストマーの融点以上でなければならないこ
とは言うまでもないが、筒状布帛を構成するポリ
アミド系合繊維の延伸効果が失われ、物性が低下
するのを防ぐため、該ポリアミド系合成繊維の融
点よりも20℃以上低い温度であることが好まし
い。 It goes without saying that the processing temperature in the present invention must be higher than the melting point of the polyurethane elastomer, but in order to prevent the stretching effect of the polyamide synthetic fibers constituting the cylindrical fabric from being lost and the physical properties to decrease, The temperature is preferably 20° C. or more lower than the melting point of the polyamide synthetic fiber.

又、切り開いたシートには、成型時の円筒状の
曲がりぐせが残つており、幅方向に彎曲している
ため、これを熱プレスにより彎曲を除去する必要
がある。この時の温度は、ポリウレタンエラスト
マーの融点より10℃以上低く、ガラス転移点より
も高い温度範囲であるのが好ましい。 In addition, the cut-out sheet still has cylindrical curvature from molding and is curved in the width direction, so it is necessary to remove the curvature by heat pressing. The temperature at this time is preferably in a temperature range that is 10° C. or more lower than the melting point of the polyurethane elastomer and higher than the glass transition point.

以上述べた如く、本発明の方法は工程がきわめ
て簡単で一工程で布補強エラストマーシートを得
ることができ、しかもラミネーシヨン法の如くシ
ートの両縁耳部に不均一な部分が生じることがな
いので、材料の無駄が生じることはない。しか
も、本発明の方法で得られた布補強エラストマー
シートは、被覆層がポリウレタンエラストマーで
あるため、衛生上問題がなく安全であると共に、
適度の伸縮弾性、適度の摩擦係数、優れた耐油、
耐薬品、耐摩耗、耐候、耐熱、耐寒等の諸性能を
有し、さらに接着剤を介することなく補強布帛と
強力に接着している等の優れた性質を有するもの
であつて、コンベアベルト又はフレキシブルコン
テナ用のシートとして極めて優れており、特に耐
摩耗性が要求されるような用途に好適なものであ
る。 As mentioned above, the process of the present invention is extremely simple, and a fabric-reinforced elastomer sheet can be obtained in one step, and unlike the lamination method, uneven areas do not occur on both edges of the sheet. Therefore, no material is wasted. Moreover, since the cloth-reinforced elastomer sheet obtained by the method of the present invention has a polyurethane elastomer coating layer, it is safe and has no hygienic problems.
Appropriate elasticity, appropriate coefficient of friction, excellent oil resistance,
It has various properties such as chemical resistance, abrasion resistance, weather resistance, heat resistance, cold resistance, etc., and also has excellent properties such as strong adhesion to reinforcing fabric without using an adhesive. It is extremely excellent as a sheet for flexible containers, and is particularly suitable for applications where abrasion resistance is required.

以下本発明の一つの実施例を記しておく。ナイ
ロン６繊維の1000デニールのマルチフイラメント
糸を経糸及び緯糸として、10cm幅当り60本の緯偉
糸密度で内径150mmの筒状布帛を織成し、該筒状
布帛にポリウレタンエラストマー（例えば、日本
エラストラン社、エラストランE590）を第２図
の押出機を用いて200℃でコーテイングし、筒状
布帛の内側、外側共に平均0.5mm厚みの樹脂層を
有する積層体を得た。次いでこの筒状積層体を切
開し、130℃に加熱したロール間を通してプレス
し、彎曲を除去し、厚み1.1mmの平板状の布補強
エラストマーシートを製造した。このシートを幅
300mm、長さ２ｍに切り出し、両端を互に180℃で
熱圧着してエンドレスベルトとした。このベルト
を直径20cmと直径50cmのプーリー間に10Kg／10mm
の張力下でセツトし、回転テストを行なつたとこ
ろ、100時間回転させても何ら異常は認められな
かつた。 One embodiment of the present invention will be described below. A cylindrical fabric with an inner diameter of 150 mm is woven using 1000 denier multifilament yarns of nylon 6 fibers as the warp and weft at a density of 60 weft yarns per 10 cm width, and polyurethane elastomer (for example, Nippon Elastran Co., Ltd.) is woven into the cylindrical fabric. , Elastolan E590) at 200° C. using the extruder shown in FIG. 2 to obtain a laminate having a resin layer with an average thickness of 0.5 mm on both the inside and outside of the cylindrical fabric. This cylindrical laminate was then cut open and pressed between rolls heated to 130°C to remove curvature, producing a flat cloth-reinforced elastomer sheet with a thickness of 1.1 mm. Width this sheet
It was cut out to a length of 300 mm and 2 m, and both ends were heat-pressed to each other at 180°C to make an endless belt. This belt is 10kg/10mm between pulleys with a diameter of 20cm and a diameter of 50cm.
When a rotation test was performed under the tension of , no abnormality was observed even after 100 hours of rotation.

又、比較のために筒状布帛の素材にポリエチレ
ンテレフタレート繊維を用い、他の条件はすべて
先の例と同様にしてベルトを作成し、同様のテス
トを行つたところ、20時間後に既にエラストマー
と布帛との剥離現象が見られた。特にベルトの両
側縁から布帛の繊維がはみ出して、著るしい毛羽
立とを生じ、ベルトとして不適当であつた。 For comparison, a belt was made using polyethylene terephthalate fiber as the material for the cylindrical fabric and all other conditions were the same as in the previous example, and the same test was conducted. After 20 hours, the elastomer and fabric were already mixed. A peeling phenomenon was observed. In particular, the fibers of the fabric protruded from both edges of the belt, resulting in significant fluffing, making it unsuitable for use as a belt.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の実施例を示す正面図であり、
第２図は前記実施例におけるヘツドの一部半裁縦
断面である。 １……筒状布帛、３……ヘツド、１６……ポリ
ウレタンエラストマー、１７，１８……被覆層、
２０……繊維補強合成樹脂筒状体（筒状積層
体）、２１……ナイフ、２４……熱ローラ。 FIG. 1 is a front view showing an embodiment of the present invention,
FIG. 2 is a partial vertical cross-section of the head in the above embodiment. 1... Cylindrical fabric, 3... Head, 16... Polyurethane elastomer, 17, 18... Covering layer,
20... Fiber-reinforced synthetic resin cylindrical body (cylindrical laminate), 21... Knife, 24... Heat roller.

Claims (1)

【特許請求の範囲】 １ 主としてポリアミド系合成繊維からなる糸条
を筒状に織成又は編組してなる筒状布帛を接着剤
で処理することなく、押出機ヘツド中に連続的に
供給しつつ、その外周にポリウレタンエラストマ
ーの溶融物を供給し、これを前記筒状布帛の外面
に圧着して該ポリウレタンエラストマー溶融物に
よる外面被覆層を形成すると共に、ポリウレタン
エラストマー溶融物の一部を前記筒状布帛の繊維
の間隙を通して筒状布帛の内面へ侵入せしめ、こ
れを該筒状布帛の内面に圧着して該ポリウレタン
エラストマー溶融物による内面被覆層を形成し
て、筒状布帛の内外両面にポリウレタンエラスト
マーの被覆層を有し且つ該被覆層が前記筒状布帛
の繊維の間隙を通して一体化した筒状積層体を形
成し、次いで該筒状積層体を切り開き、熱プレス
により幅方向の彎曲を除去することを特徴とする
布補強エラストマーシートの製造方法。 ２ ポリウレタンエラストマーの溶融物の温度
が、該ポリウレタンエラストマーの融点以上であ
つて、ポリアミド系合成繊維の融点よりも20℃以
上低い温度であることを特徴とする、特許請求の
範囲第１項記載の布補強エラストマーシートの製
造方法。[Scope of Claims] 1 A cylindrical fabric made by weaving or braiding threads mainly made of polyamide synthetic fibers into a cylindrical shape is continuously fed into an extruder head without being treated with an adhesive. , a polyurethane elastomer melt is supplied to the outer periphery of the cylindrical fabric, and this is pressed onto the outer surface of the cylindrical fabric to form an outer surface coating layer of the polyurethane elastomer melt, and a part of the polyurethane elastomer melt is supplied to the cylindrical fabric. The polyurethane elastomer is injected into the inner surface of the cylindrical fabric through the gaps between the fibers of the fabric, and is pressed onto the inner surface of the cylindrical fabric to form an inner surface coating layer of the molten polyurethane elastomer. A cylindrical laminate is formed in which the cylindrical laminate is integrated through gaps between the fibers of the cylindrical fabric, and then the cylindrical laminate is cut open and the curvature in the width direction is removed by heat pressing. A method for producing a cloth-reinforced elastomer sheet. 2. The temperature of the melt of the polyurethane elastomer is higher than the melting point of the polyurethane elastomer and 20°C or more lower than the melting point of the polyamide synthetic fiber, according to claim 1. A method for producing a cloth-reinforced elastomer sheet.
JP725080A 1980-01-23 1980-01-23 Manufacture of cloth-reinforced elastomer sheet Granted JPS56104044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP725080A JPS56104044A (en) 1980-01-23 1980-01-23 Manufacture of cloth-reinforced elastomer sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP725080A JPS56104044A (en) 1980-01-23 1980-01-23 Manufacture of cloth-reinforced elastomer sheet

Publications (2)

Publication Number Publication Date
JPS56104044A JPS56104044A (en) 1981-08-19
JPS6124985B2 true JPS6124985B2 (en) 1986-06-13

Family

ID=11660771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP725080A Granted JPS56104044A (en) 1980-01-23 1980-01-23 Manufacture of cloth-reinforced elastomer sheet

Country Status (1)

Country Link
JP (1) JPS56104044A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003902614A0 (en) * 2003-05-26 2003-06-12 Gale Pacific Limited Woven fabric and manufacture thereof
CN103448255B (en) * 2013-09-12 2016-01-20 艾艾精密工业输送***（上海）股份有限公司 A kind of conveyer belt and preparation method thereof
CN108381960A (en) * 2018-02-28 2018-08-10 广州创耐工业皮带有限公司 A kind of production method of felt face transmission belt

Also Published As

Publication number Publication date
JPS56104044A (en) 1981-08-19

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