JPS636345B2 - - Google Patents
Info
- Publication number
- JPS636345B2 JPS636345B2 JP58024859A JP2485983A JPS636345B2 JP S636345 B2 JPS636345 B2 JP S636345B2 JP 58024859 A JP58024859 A JP 58024859A JP 2485983 A JP2485983 A JP 2485983A JP S636345 B2 JPS636345 B2 JP S636345B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- film
- water
- cooling
- viscous fluid
- 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
Links
- 229920005992 thermoplastic resin Polymers 0.000 claims description 23
- 239000012530 fluid Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002562 thickening agent Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 description 16
- 238000000465 moulding Methods 0.000 description 7
- 229920002472 Starch Polymers 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000008107 starch Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 229920000715 Mucilage Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920005615 natural polymer Polymers 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- FMZUHGYZWYNSOA-VVBFYGJXSA-N (1r)-1-[(4r,4ar,8as)-2,6-diphenyl-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical group C([C@@H]1OC(O[C@@H]([C@@H]1O1)[C@H](O)CO)C=2C=CC=CC=2)OC1C1=CC=CC=C1 FMZUHGYZWYNSOA-VVBFYGJXSA-N 0.000 description 1
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 244000215068 Acacia senegal Species 0.000 description 1
- 229920001817 Agar Polymers 0.000 description 1
- 244000247812 Amorphophallus rivieri Species 0.000 description 1
- 235000001206 Amorphophallus rivieri Nutrition 0.000 description 1
- 241000416162 Astragalus gummifer Species 0.000 description 1
- 241001474374 Blennius Species 0.000 description 1
- 108010076119 Caseins Proteins 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 229920002307 Dextran Polymers 0.000 description 1
- 229920002085 Dialdehyde starch Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 229920002752 Konjac Polymers 0.000 description 1
- 229920000057 Mannan Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229920001615 Tragacanth Polymers 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- DXPAGHYNOAEBBZ-UHFFFAOYSA-L butylaluminum(2+);dibenzoate Chemical group CCCC[Al+2].[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1 DXPAGHYNOAEBBZ-UHFFFAOYSA-L 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 229940087101 dibenzylidene sorbitol Drugs 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000252 konjac Substances 0.000 description 1
- 235000010485 konjac Nutrition 0.000 description 1
- AIHDCSAXVMAMJH-GFBKWZILSA-N levan Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)OC[C@@H]1[C@@H](O)[C@H](O)[C@](CO)(CO[C@@H]2[C@H]([C@H](O)[C@@](O)(CO)O2)O)O1 AIHDCSAXVMAMJH-GFBKWZILSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 229920001592 potato starch Polymers 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000008279 sol Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 229940100445 wheat starch Drugs 0.000 description 1
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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は熱可塑性樹脂シートまたはフイルムの
製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a thermoplastic resin sheet or film.
従来、熱可塑性樹脂のT−ダイ急冷シートまた
はフイルムの製造方法としてチルロール法、水冷
法などが知られている。しかし、チルロール法は
高速成形時、ロールと溶融樹脂膜の間に空気をま
き込んだり、ロールと溶融樹脂膜の密着性が悪い
ために、厚みムラやシワが発生したり、さらには
厚物シート等にあつては溶融樹脂膜の表面と裏面
の冷却差によるカールの発生や不十分な急冷によ
る透明性、表面光沢の低下などの欠点がある。ま
た、水冷法では溶融樹脂膜からの放熱が冷却水面
において局部的に生じ、水面の沸騰による沸騰
斑、水面の波立ちや揺れなどによる冷却の不均
一、冷却不足による厚みムラやヘイズ斑、さらに
は透明性や表面光沢のムラ、低下が生じ、高速成
形を行なえないという欠点がある。 Conventionally, chill roll methods, water cooling methods, and the like are known as methods for producing T-die quenched sheets or films of thermoplastic resins. However, with the chill roll method, during high-speed molding, air is introduced between the roll and the molten resin film, and the adhesion between the roll and the molten resin film is poor, resulting in uneven thickness and wrinkles, and even thick sheets. In such cases, there are drawbacks such as occurrence of curling due to the difference in cooling between the front and back surfaces of the molten resin film, and a decrease in transparency and surface gloss due to insufficient rapid cooling. In addition, in the water cooling method, heat dissipation from the molten resin film occurs locally on the cooling water surface, causing boiling spots due to boiling of the water surface, uneven cooling due to ripples and shaking of the water surface, uneven thickness and haze spots due to insufficient cooling, etc. It has the drawback that it causes unevenness and reduction in transparency and surface gloss, and high-speed molding cannot be performed.
ところで、水冷法はロール法よりも効率よくシ
ート等を冷却できるという利点を有している。そ
のため、前記した水冷法の欠点を改良する方法に
関して種々の提案がなされている。たとえば溶
融樹脂膜の両面を流動する冷却水流によつて冷却
する方法、冷却槽に設けたスリツトを有する回
転ロール間に冷却水を流下させ、ここに溶融樹脂
膜を導入する方法などがある。しかしながら、こ
れらの方法にあつては、透明性にすぐれたシート
またはフイルムを得るためには成形速度に限界が
あり、冷却の制御も非常に困難であり、特に0.2
mm以上の厚さのシート等の成形を行なうことがで
きなかつた。 By the way, the water cooling method has the advantage of being able to cool sheets etc. more efficiently than the roll method. Therefore, various proposals have been made regarding methods for improving the drawbacks of the water cooling method described above. For example, there is a method in which the molten resin film is cooled by a stream of cooling water flowing on both sides of the molten resin film, and a method in which the molten resin film is introduced into a space where cooling water flows down between rotating rolls having slits provided in a cooling tank. However, with these methods, there is a limit to the molding speed in order to obtain a sheet or film with excellent transparency, and it is also very difficult to control cooling.
It was not possible to form sheets etc. with a thickness of mm or more.
本発明の目的は、このような問題点を解消した
水冷法による熱可塑性樹脂シートまたはフイルム
の製造方法を提供することである。 An object of the present invention is to provide a method for producing a thermoplastic resin sheet or film by a water cooling method that eliminates such problems.
本発明は、T−ダイから溶融状態で押出された
膜状の熱可塑性樹脂を、スリツト内を流下する粘
度2〜3000センチポイズ(cp)の粘性流体に導
入して該樹脂の両面を冷却することを特徴とする
熱可塑性樹脂シートまたはフイルムの製造方法で
ある。 The present invention involves introducing a film-like thermoplastic resin extruded in a molten state from a T-die into a viscous fluid having a viscosity of 2 to 3000 centipoise (cp) flowing down a slit to cool both sides of the resin. A method for producing a thermoplastic resin sheet or film, characterized by:
本発明においてシートやフイルムの原料として
用いる熱可塑性樹脂としては特に制限がなく、た
とえばポリオレフイン(ポリエチレン、ポリプロ
ピレンなど)、ポリエステル、ポリアミド、ポリ
エチレンテレフタレート、ポリスチレン、ポリ塩
化ビニル、ポリ塩化ビニリデン等を挙げることが
でき、特に従来よりシート等の透明性や表面性な
どに問題のあつた結晶性熱可塑性樹脂についても
このような問題を生起することなく使用すること
ができる。また、本発明のシートやフイルムには
多層シートやフイルムも含まれ、さらにシリカ、
タルク、パラ−ターシヤリーブチル安息香酸アル
ミニウム、ジベンジリデンソルビトールなどの造
核剤を添加したものも含まれる。 The thermoplastic resin used as a raw material for sheets and films in the present invention is not particularly limited, and includes, for example, polyolefins (polyethylene, polypropylene, etc.), polyester, polyamide, polyethylene terephthalate, polystyrene, polyvinyl chloride, polyvinylidene chloride, etc. In particular, crystalline thermoplastic resins, which have conventionally had problems with transparency and surface properties of sheets, etc., can be used without causing such problems. In addition, the sheets and films of the present invention include multilayer sheets and films, and further include silica,
Also included are those to which nucleating agents such as talc, para-tertiary butyl aluminum benzoate, and dibenzylidene sorbitol are added.
また、本発明に用いる粘性流体としては、粘度
2〜3000センチポイズ(cp)、好ましくは3〜
1000cpのものであり、粘性流体の具体例として
は水に有機もしくは無機の増粘剤を添加した水溶
液が好ましいものである。ここで有機増粘剤とし
ては天然高分子物質、半合成品、合成品など各種
のものを使用できる。天然高分子物質には、かん
しよデンプン、ばれいしよデンプン、小麦デンプ
ンなどのデンプン質;こんにやくなどのマンナ
ン;寒天、アルギン酸ナトリウムなどの海藻類;
トラガントガム、アラビアゴムなどの植物粘質
物;デキストラン、レバンなどの微生物粘質物;
にかわ、ゼラチン、カゼイン、コラーゲンなどの
タンパク質等がある。半合成品には、ビスコー
ス、メチルセルロース、セルボキシメチルセルロ
ースなどのセルロース系物質;可溶性デンプン、
カルボキシメチルデンプン、ジアルデヒドデンプ
ンなどのデンプン系物質等がある。また、合成品
としては、ポリビニルアルコール、ポリアクリル
酸ナトリウム、ポリエチレンオキシド等がある。 The viscous fluid used in the present invention has a viscosity of 2 to 3000 centipoise (cp), preferably 3 to 3000 centipoise (cp).
1000 cp, and a preferred example of the viscous fluid is an aqueous solution prepared by adding an organic or inorganic thickener to water. Here, various organic thickeners can be used, such as natural polymer substances, semi-synthetic products, and synthetic products. Natural polymer substances include starches such as Japanese starch, potato starch, and wheat starch; mannan such as konjac; seaweed such as agar and sodium alginate;
Plant mucilages such as gum tragacanth and gum arabic; Microbial mucilages such as dextran and levan;
These include proteins such as glue, gelatin, casein, and collagen. Semi-synthetic products include cellulosic substances such as viscose, methylcellulose, and cellboxymethylcellulose; soluble starch,
There are starch-based substances such as carboxymethyl starch and dialdehyde starch. In addition, synthetic products include polyvinyl alcohol, sodium polyacrylate, polyethylene oxide, and the like.
一方、無機増粘剤としてはシリカゾル、アルミ
ナゾル、粘土、水ガラス、各種金属塩などがあ
る。 On the other hand, inorganic thickeners include silica sol, alumina sol, clay, water glass, and various metal salts.
これら増粘剤を水に加えて調製した水溶液のほ
か、ポリエチレングリコール、ポリプロピレング
リコール、シリコーンオイルなどの粘性物質を単
独で使用することもできる。本発明において粘性
流体は膜状の熱可塑性樹脂を冷却するために用い
られ、液温が−10〜+50℃の範囲のものが好まし
い。特に厚み0.2mm以上のシートの製造において
は液温が20℃以下、特に好ましくは10℃以下にす
ることがヘイズ斑の発生防止に効果的である。 In addition to aqueous solutions prepared by adding these thickeners to water, viscous substances such as polyethylene glycol, polypropylene glycol, and silicone oil can also be used alone. In the present invention, the viscous fluid is used to cool the thermoplastic resin film, and preferably has a liquid temperature in the range of -10 to +50°C. Particularly in the production of sheets with a thickness of 0.2 mm or more, it is effective to keep the liquid temperature below 20°C, particularly preferably below 10°C, to prevent the occurrence of haze spots.
粘性流体による膜状熱可塑性樹脂の冷却は、ス
リツト内を流下する粘度2〜3000cpの粘性流体
に溶融状態でT−ダイから押出された膜状の熱可
塑性樹脂を導入する。第1図および第2図は本発
明の方法を実施する装置の態様を示す説明図であ
る。 To cool the thermoplastic resin film with a viscous fluid, the thermoplastic resin film extruded from a T-die in a molten state is introduced into the viscous fluid having a viscosity of 2 to 3000 cp flowing down the slit. FIGS. 1 and 2 are explanatory diagrams showing aspects of an apparatus for carrying out the method of the present invention.
第1図により本発明の方法を説明すると、T−
ダイ1から溶融状態で押出された膜状の熱可塑性
樹脂2を粘性流体3が流れているスリツト4に導
入する。このスリツト4はT−ダイ1の下方に位
置する水槽5と接続して形成されており、その長
さは特に制限されないが、通常、5〜100mm程度
であり、比較的短かい方が好ましい。また、スリ
ツト間隔も特に制限はなく、用いる樹脂、成形速
度などの成形条件、製品要求性状などを考慮して
決定すればよい。 To explain the method of the present invention with reference to FIG.
A thermoplastic resin film 2 extruded in a molten state from a die 1 is introduced into a slit 4 through which a viscous fluid 3 is flowing. This slit 4 is formed to be connected to a water tank 5 located below the T-die 1, and its length is not particularly limited, but is usually about 5 to 100 mm, and is preferably relatively short. Further, the slit interval is not particularly limited, and may be determined by taking into account the resin used, molding conditions such as molding speed, and the required properties of the product.
水槽5にあつては膜状の熱可塑性樹脂導入部の
粘性流体が流動することが必要であり、また液位
(水面までの深さ)は可及的に低くすべきで、一
般的には7mm以下が好ましい。液位が10mmとなる
と、得られるシートやフイルムに沸騰斑、ヘイズ
斑、カールが発生し、総ヘイズも20〜30%という
高い値となり好ましくない。該水槽5からは冷却
用の粘性流体が流れているため、膜状の熱可塑性
樹脂はスリツト4を通過する際に該流体により冷
却される。すなわち、膜状の熱可塑性樹脂の両面
は平行に流れる該流体によつて効率的に冷却され
る。この場合、粘性流体の流速は膜状の熱可塑性
樹脂の走行速度に近いことが望ましい。さらに、
水槽と接続しているスリツトは第1図のような1
段の場合に限定されず、2段以上の複数段として
膜状の熱可塑性樹脂を冷却することもできる。ま
た、第2図はスリツトの他の態様を示したもので
ある。すなわち、1対の回転する無端ベルト1
3,13′を間隔をおいて対向せしめて形成した
スリツト14であつて、該間隔に粘性流体を流下
させると共に該無端ベルトの対向面を粘性流体の
流れ方向と同方向に移動させるようにしたスリツ
トである。ここで無端ベルトの材質としてはステ
ンレススチールなどの金属やゴムのほか、フツ素
樹脂などの耐熱性、平滑性にすぐれた樹脂を塗布
もしくは含浸させた識物等が好ましい。無端ベル
ト13,13′は既知の手段、たとえばモーター
などの駆動源と接続させた駆動ロール15,1
5′によつて駆動させることができる。 In the case of the water tank 5, it is necessary that the viscous fluid in the membrane-like thermoplastic resin introduction part flow, and the liquid level (depth to the water surface) should be as low as possible. It is preferably 7 mm or less. When the liquid level reaches 10 mm, boiling spots, haze spots, and curls will occur on the resulting sheet or film, and the total haze will be as high as 20 to 30%, which is undesirable. Since a cooling viscous fluid flows from the water tank 5, the film-like thermoplastic resin is cooled by the fluid when passing through the slit 4. That is, both sides of the film-like thermoplastic resin are efficiently cooled by the fluid flowing in parallel. In this case, it is desirable that the flow rate of the viscous fluid be close to the traveling speed of the film-like thermoplastic resin. moreover,
The slit connected to the aquarium is 1 as shown in Figure 1.
It is not limited to the case of stages, but the film-shaped thermoplastic resin can also be cooled in multiple stages of two or more stages. Further, FIG. 2 shows another embodiment of the slit. That is, a pair of rotating endless belts 1
3 and 13' facing each other with an interval, the slit 14 is configured to allow the viscous fluid to flow down into the interval and to move the facing surface of the endless belt in the same direction as the flow direction of the viscous fluid. It's a slit. Here, the endless belt is preferably made of metal such as stainless steel, rubber, or materials coated with or impregnated with a resin having excellent heat resistance and smoothness such as fluororesin. The endless belts 13, 13' are driven by known means, for example drive rolls 15, 1 connected to a drive source such as a motor.
5'.
本発明で粘度2〜3000cpの粘性流体を用いる
のは、流体の粘度が高いために流体の落下速度が
速くなつても乱流にならないこと、特に溶融樹脂
膜と最初に接触する部分において均一流れとなる
ため均一冷却が可能となるからである。 The reason why a viscous fluid with a viscosity of 2 to 3000 cp is used in the present invention is that because of the high viscosity of the fluid, even if the fluid falls at a high speed, it will not become a turbulent flow, and that it will flow uniformly, especially in the part where it first contacts the molten resin film. This is because uniform cooling becomes possible.
このことにより、沸騰斑、ヘイズ斑のない表面
状態にすぐれ、かつ透明性にすぐれたシート類を
得ることができる。 This makes it possible to obtain sheets with excellent surface conditions free of boiling spots and haze spots and with excellent transparency.
冷却された膜状の熱可塑性樹脂は、次いで受水
槽6に送られる。受水槽6には、図示したよう
に、ガイドロール7が設けられており、受水槽で
さらに冷却された熱可塑性樹脂はガイドロール7
を経て引取りロール8により引取られ、巻取りロ
ールに導かれる。なお、ガイドロールはロール鏡
面を熱可塑性樹脂に転写するための転写ロールと
して用いることも出来る。図面、9は水位調節
板、10は溢流板、11は冷却器、12はポン
プ、16,16′はバツクアツプロール、17,
17′は張力用ロールである。 The cooled thermoplastic resin film is then sent to the water receiving tank 6. The water receiving tank 6 is provided with a guide roll 7 as shown in the figure, and the thermoplastic resin further cooled in the water receiving tank is transferred to the guide roll 7.
The film is then taken up by a take-up roll 8 and guided to a take-up roll. Note that the guide roll can also be used as a transfer roll for transferring the mirror surface of the roll onto a thermoplastic resin. Drawing, 9 is a water level adjustment board, 10 is an overflow board, 11 is a cooler, 12 is a pump, 16, 16' is a backup roll, 17,
17' is a tension roll.
本発明の、改良された粘性流体冷却法によれ
ば、結晶性の熱可塑性樹脂を原料としてシートや
フイルムを製造する場合でも無配向の透明性、表
面光沢性にすぐれたシート等を得ることができ
る。しかも、得られるシート等に厚みムラやシワ
などがなく、均質性にすぐれている。また、比較
的厚みのあるシート等を高品質で、しかも高速成
形により効率よく生産できることも本発明の特色
の1つである。そのほか本発明の方法は、設備費
が安く、かつ冷却制御が容易であることから全体
として製品コストを低減できるという利点を有し
ている。 According to the improved viscous fluid cooling method of the present invention, even when manufacturing sheets or films using crystalline thermoplastic resin as a raw material, it is possible to obtain non-oriented sheets with excellent transparency and surface gloss. can. Furthermore, the resulting sheet etc. has no uneven thickness or wrinkles, and has excellent homogeneity. Another feature of the present invention is that it is possible to efficiently produce relatively thick sheets and the like with high quality and high speed molding. In addition, the method of the present invention has the advantage that the equipment cost is low and cooling control is easy, so that the overall product cost can be reduced.
本発明により得られるシート等は食品、医薬品
などの包装用に好適であるほか、圧空成形、ロー
ル圧延成形、延伸成形などの固相成形用原反とし
て利用することができる。 The sheets and the like obtained by the present invention are suitable for packaging foods, medicines, etc., and can also be used as raw materials for solid phase forming, such as air pressure forming, roll rolling, and stretch forming.
次に、本発明を実施例により詳しく説明する。 Next, the present invention will be explained in detail with reference to examples.
実施例
ポリプロピレン(密度0.91g/cm3、メルトイン
デツクス2.0g/10分)をT−ダイ押出装置(押
出機60mm、L/D=28、ダイ幅500mm、ダイリ
ツプ開度1.5mm)を用いて押出した。Example: Polypropylene (density 0.91 g/cm 3 , melt index 2.0 g/10 minutes) was produced using a T-die extrusion device (extruder 60 mm, L/D = 28, die width 500 mm, die lip opening 1.5 mm). Extruded.
押出された溶融樹脂を第1図に示す冷却装置に
導入し、厚み0.2mmのポリプロピレンシートを得
た。なお、シートの製造条件は以下の通りであ
る。 The extruded molten resin was introduced into the cooling device shown in FIG. 1 to obtain a polypropylene sheet with a thickness of 0.2 mm. Note that the manufacturing conditions of the sheet are as follows.
製造条件
樹脂温度 240℃
ダイ温度 280℃
成形速度 25m/min
エヤーギヤツプ 120mm
冷却水 ナトリウムカルボキシメチルセルロース
0.001重量%を加えた水道水(粘度:20
センチポイズ/20℃)
冷却液温度 4℃
スリツト間隔 1.5mm
スリツト長さ 50mm
水槽の液位 3mm
このようにして得られたシートには沸騰斑、ヘ
イズ斑、カールが全く見られず、総ヘイズは8%
(内部ヘイズ6%、外部ヘイズ2%)であり、透
明性にすぐれていた。Manufacturing conditions Resin temperature 240℃ Die temperature 280℃ Molding speed 25m/min Air gap 120mm Cooling water Sodium carboxymethyl cellulose
Tap water with 0.001% by weight added (viscosity: 20
Centipoise/20°C) Coolant temperature: 4°C Slit spacing: 1.5mm Slit length: 50mm Water tank liquid level: 3mm No boiling spots, haze spots, or curls were observed on the sheet thus obtained, and the total haze was 8 %
(internal haze 6%, external haze 2%), and had excellent transparency.
比較例
実施例において冷却液として水道水を用いたこ
と以外は実施例と同様にして行ないポリプロピレ
ンシートを得た。得られたシートにはヘイズ斑が
見られ、総ヘイズは28〜32%(内部ヘイズ20〜24
%、外部ヘイズ8〜12%)であつた。Comparative Example A polypropylene sheet was obtained in the same manner as in the example except that tap water was used as the cooling liquid. The resulting sheet showed haze spots, with a total haze of 28-32% (internal haze 20-24%).
%, external haze 8-12%).
第1図および第2図は本発明の方法を実施する
ために用いる装置の態様を示す説明図である。
1……T−ダイ、2……膜状熱可塑性樹脂、3
……粘性流体、4……スリツト、13,13′…
…無端ベルト。
FIGS. 1 and 2 are explanatory diagrams showing aspects of an apparatus used to carry out the method of the present invention. 1...T-die, 2...Membrane thermoplastic resin, 3
...Viscous fluid, 4...Slit, 13,13'...
...Endless belt.
Claims (1)
可塑性樹脂を、スリツト内を流下する粘度2〜
3000センチポイズの粘性流体に導入して該樹脂の
両面を冷却することを特徴とする熱可塑性樹脂シ
ートまたはフイルムの製造方法。 2 粘性流体が増粘剤を添加した水である特許請
求の範囲第1項記載の方法。[Claims] 1. A film-like thermoplastic resin extruded from a T-die in a molten state has a viscosity of 2 to 2 when flowing through a slit.
A method for producing a thermoplastic resin sheet or film, which comprises introducing the resin into a 3000 centipoise viscous fluid to cool both sides of the resin. 2. The method according to claim 1, wherein the viscous fluid is water to which a thickener has been added.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58024859A JPS59150726A (en) | 1983-02-18 | 1983-02-18 | Manufacture of thermoplastic resin sheet or film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58024859A JPS59150726A (en) | 1983-02-18 | 1983-02-18 | Manufacture of thermoplastic resin sheet or film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59150726A JPS59150726A (en) | 1984-08-29 |
JPS636345B2 true JPS636345B2 (en) | 1988-02-09 |
Family
ID=12149938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58024859A Granted JPS59150726A (en) | 1983-02-18 | 1983-02-18 | Manufacture of thermoplastic resin sheet or film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59150726A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61123512A (en) * | 1984-11-06 | 1986-06-11 | Idemitsu Petrochem Co Ltd | Polypropylene group resin sheet for drum vacuum forming |
JPS61189920A (en) * | 1985-02-20 | 1986-08-23 | Idemitsu Petrochem Co Ltd | Thermoforming polypropylene sheet and its manufacture |
JPS62179917A (en) * | 1986-02-04 | 1987-08-07 | Nippon Petrochem Co Ltd | Extrusion molding of polymeric material |
JPH0764008B2 (en) * | 1990-10-23 | 1995-07-12 | 出光石油化学株式会社 | Method for producing polypropylene resin sheet or film |
US6306327B1 (en) | 1995-11-14 | 2001-10-23 | Idemitsu Petrochemical Co., Ltd. | Producing method of a thermoplastic resin sheet and producing apparatus therefor |
-
1983
- 1983-02-18 JP JP58024859A patent/JPS59150726A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS59150726A (en) | 1984-08-29 |
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