JPS6229203B2 - - Google Patents
Info
- Publication number
- JPS6229203B2 JPS6229203B2 JP7457878A JP7457878A JPS6229203B2 JP S6229203 B2 JPS6229203 B2 JP S6229203B2 JP 7457878 A JP7457878 A JP 7457878A JP 7457878 A JP7457878 A JP 7457878A JP S6229203 B2 JPS6229203 B2 JP S6229203B2
- Authority
- JP
- Japan
- Prior art keywords
- extruder
- molecular weight
- supply hopper
- saturated polyester
- material supply
- 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
- 239000000463 material Substances 0.000 claims description 37
- 229920006395 saturated elastomer Polymers 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 10
- 229920001225 polyester resin Polymers 0.000 claims description 10
- 239000004645 polyester resin Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000000704 physical effect Effects 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 238000006068 polycondensation reaction Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【発明の詳細な説明】
この発明は成形用原料樹脂である飽和ポリエス
テル樹脂の成形加工中における分子量向上手段の
提供に係わる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the provision of a means for improving the molecular weight of a saturated polyester resin, which is a raw material resin for molding, during the molding process.
飽和ポリエステル等の熱可塑性樹脂材料の成形
加工中の加熱加圧下における挙動は次記の如くで
ある。 The behavior of thermoplastic resin materials such as saturated polyester under heat and pressure during molding is as follows.
第１段階、可塑化材料が加熱によつて溶融軟化
（可塑化）して粘度が低下し流動可能な状態とな
る段階である。 The first stage is a stage in which the plasticized material is melted and softened (plasticized) by heating to reduce its viscosity and become fluid.
第２段階、賦形または金型充てん流動可能な状
態となつた材料が、圧力を加えられて金型キヤビ
テイのすみずみまで完全に充てんされて所望の形
状が与えられる（賦形）段階である。 The second stage is the shaping or mold filling stage, in which the material, now in a flowable state, is pressurized to completely fill every corner of the mold cavity to give it the desired shape (forming). .
第３段階、硬化所望の形を与えられた材料が冷
却による物理的な固化によつてそのままの状態で
固まる。 Third stage, hardening The material, which has been given the desired shape, is solidified in situ by physical solidification by cooling.
飽和ポリエステル樹脂にあつては、上述の材料
の加熱下にあつて重縮反応をおこす。 In the case of saturated polyester resin, a polycondensation reaction occurs when the above-mentioned material is heated.
この重縮合反応は段階的に進行し、分子量は反
応時間とともに増加するが、これは平衡反応であ
るので、水分の存在量で生成重縮合物の分子量は
規定される。 This polycondensation reaction proceeds in stages, and the molecular weight increases with reaction time, but since this is an equilibrium reaction, the molecular weight of the polycondensate produced is determined by the amount of water present.
飽和ポリエステル樹脂等の熱可塑性樹脂は周知
のように長鎖状高分子の集合団体であり、その最
終成形品の物性は基本的にはそれぞれの樹脂高分
子の重合度と結晶化度を中心とする固体構造に依
存しているのであつて、少なくとも成形加工工程
の中での高分子の解重合は起つても重合の促進は
行なわないことも特徴といえよう。 As is well known, thermoplastic resins such as saturated polyester resins are aggregates of long-chain polymers, and the physical properties of their final molded products are basically determined by the degree of polymerization and crystallinity of each resin polymer. It is also characteristic that polymerization is not promoted, even if depolymerization of the polymer occurs during the molding process.
したがつて配合原料樹脂としてはまず分子量
（重合度）をその分布の選定が重要である。 Therefore, it is important to first select the molecular weight (degree of polymerization) and distribution of the raw material resin.
低分子量分布の広すぎる場合や低重合物の含量
が多い場合は熱分解や配化劣化などの発生しやす
いことなど成形工程においても影響を及ぼす。 If the low molecular weight distribution is too wide or the content of low polymers is high, thermal decomposition and coordination deterioration are likely to occur, which will also affect the molding process.
ところで、飽和ポリエステル樹脂にあつては、
成形加工中に分子量の低下が起こり、物性が低下
するという現象がみられる。これは、材料中に含
有の水分（飽和ポリエステル樹脂は極めて吸湿性
が大）、空気中の湿気等により加水分解反応が生
じるためである。 By the way, regarding saturated polyester resin,
A phenomenon is observed in which molecular weight decreases during molding and physical properties deteriorate. This is because a hydrolysis reaction occurs due to moisture contained in the material (saturated polyester resin is extremely hygroscopic), moisture in the air, etc.
よつて、例え、分子量の大きなものを材料とし
て使用しても分子量の低下が起ることもあるし、
又、その材料に供すべきものとして、なるべく高
分子量のものをもつてくるにしてもIV値（分子
量と相対関係にある。）が0.6〜0.7の比較的低分
子量のものは１段の重合で生産可能であるが、こ
れ以上のものは２段重合となるためコスト高とな
つてしまう。よつて、材料として安価な低分子量
のもの若しくは再生材料を用いた場合には物性の
低下は避けられなく、実用化されていないのが現
状である。 Therefore, even if a material with a large molecular weight is used, a decrease in the molecular weight may occur.
Furthermore, even if one uses a material with a high molecular weight as much as possible, one with a relatively low molecular weight with an IV value (relative to molecular weight) of 0.6 to 0.7 cannot be used in one stage polymerization. Although it is possible to produce it, anything larger than this requires two-stage polymerization, resulting in high costs. Therefore, when inexpensive low molecular weight materials or recycled materials are used as materials, deterioration in physical properties is unavoidable, and the present situation is that they are not put to practical use.
本発明は叙上の事情に鑑みなされたもので、上
述の低分子量化の難点を解消し得て、安価な低分
子量の材料、再生材料であつても物性の低下を伴
なわずして使用することのできる飽和ポリエステ
ル樹脂の成形中における分子量向上手段を提供す
る。 The present invention has been made in view of the above circumstances, and can solve the above-mentioned difficulties in reducing the molecular weight, and can be used even with inexpensive low-molecular-weight materials and recycled materials without deterioration of physical properties. The present invention provides a means for improving the molecular weight of a saturated polyester resin during molding.
以下、本発明を図にもとづいて詳細に説明す
る。 Hereinafter, the present invention will be explained in detail based on the drawings.
本発明の要旨とするところは材料を本押出機に
導入するに際し、その前に当該材料をば真空雰囲
気内で加熱処理するものとした点にあり、その具
体的な実施例としては、第１図に示す如く、本押
出機１の前に予備押出機２を介在させ、当該予備
押出機２に接続している材料供給用ホツパー３を
真空ポンプ４で真空処理するものとしてもよい
し、又、第２図に示す如く、本押出機２の前に密
閉ベルへ搬送室５を介在させせ、当該室５並びに
これに接続する材料供給用ホツパー６を真空ポン
プ７，８でもつて真空処理するものとしてもよ
い。なを図中９は金型を示す。 The gist of the present invention is that before introducing the material into the extruder, the material is heat-treated in a vacuum atmosphere. As shown in the figure, a preliminary extruder 2 may be interposed in front of the main extruder 1, and a material supply hopper 3 connected to the preliminary extruder 2 may be vacuum-treated with a vacuum pump 4, or As shown in FIG. 2, a transfer chamber 5 is interposed in a closed bell in front of the extruder 2, and the chamber 5 and the material supply hopper 6 connected thereto are vacuum-processed using vacuum pumps 7 and 8. It can also be used as a thing. 9 in the figure indicates a mold.
かくすることにより、安価な低分子量の材料若
しくは再生材料よりなる飽和ポリエステル樹脂材
料は本押出機に導入される以前の加熱処理程並び
に本押出機にあつても真空作用を受けるため、材
料中に含有の水分、空気中の湿気はもとより化学
反応によつて生じる水分は直ちに強制的に除去さ
れていくために、特に、本押出機の前の加熱処理
工程で起こる縮重合反応にあつては、加水分解反
応が規制されることとなり、分子量の低下現象が
廻避される。 By doing this, the saturated polyester resin material made of inexpensive low molecular weight material or recycled material is subjected to a heat treatment process before being introduced into the main extruder, and is also subjected to a vacuum effect even in the main extruder, so that there is no damage in the material. In particular, in the case of the polycondensation reaction that occurs in the heat treatment process before the extruder, since the moisture contained, the moisture in the air, and the moisture generated by chemical reactions are immediately forcibly removed. The hydrolysis reaction is regulated and the phenomenon of molecular weight reduction is avoided.
この結果、縮重合反応は極めてすみやかに進行
するので、安価な低分子量の材料、再生材料であ
つても高分子量化し得、物性の低下を生じること
もない。 As a result, the polycondensation reaction proceeds extremely quickly, so that even inexpensive low-molecular-weight materials or recycled materials can be made to have a high molecular weight without causing any deterioration in physical properties.
第１図並びに第２図は本発明の実施例を示す要
領略示図である。
符号の説明、１……本押出機、２……予備押出
機、３……材料供給用ホツパー、４……真空ポン
プ、５……密閉ベルト搬送室、６……材料供給用
ホツパー、７，８……真空ポンプ。
FIG. 1 and FIG. 2 are schematic diagrams showing an embodiment of the present invention. Explanation of symbols: 1... Main extruder, 2... Pre-extruder, 3... Hopper for material supply, 4... Vacuum pump, 5... Sealed belt conveyance chamber, 6... Hopper for material supply, 7. 8...Vacuum pump.
Claims (1)
押出機に導入するに際し、その前に当該材料をば
材料供給用ホツパー内から真空雰囲気に晒らした
うえ、真空雰囲気内で加熱処理するものとしたこ
とを特徴とする飽和ポリエステル樹脂の成形加工
中おける分子量向上方法。 ２ 本押出機と材料供給用ホツパーとの間に予備
押出機を介在させると共に当該材料供給ホツパー
に真空装置を付設してなることを特徴とする安価
な低分子量の材料若しくは再生材料の飽和ポリエ
ステル樹脂の成形加工装置。 ３ 本押出機と材料供給用ホツパーとの間に密閉
ベルト搬送室を介在させると共に当該材料供給用
ホツパー並びに密閉ベルト搬送室に真空装置を付
設してなることを特徴とする安価な低分子量の材
料若しくは再生材料の飽和ポリエステル樹脂の成
形加工装置。[Claims] 1. When introducing an inexpensive low-molecular-weight material or recycled material into the extruder, the material is first exposed to a vacuum atmosphere from within the material supply hopper and then placed in a vacuum atmosphere. A method for improving the molecular weight during molding of a saturated polyester resin, characterized by subjecting it to heat treatment. 2. Saturated polyester resin of inexpensive low molecular weight material or recycled material, characterized in that a preliminary extruder is interposed between the main extruder and the material supply hopper, and a vacuum device is attached to the material supply hopper. molding processing equipment. 3. An inexpensive low-molecular-weight material, characterized in that a closed belt conveyance chamber is interposed between the extruder and the material supply hopper, and a vacuum device is attached to the material supply hopper and the closed belt conveyance chamber. Or molding equipment for saturated polyester resin made from recycled materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7457878A JPS552031A (en) | 1978-06-20 | 1978-06-20 | Method and apparatus for improving molecular weight in forming saturated synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7457878A JPS552031A (en) | 1978-06-20 | 1978-06-20 | Method and apparatus for improving molecular weight in forming saturated synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS552031A JPS552031A (en) | 1980-01-09 |
| JPS6229203B2 true JPS6229203B2 (en) | 1987-06-25 |
Family
ID=13551190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7457878A Granted JPS552031A (en) | 1978-06-20 | 1978-06-20 | Method and apparatus for improving molecular weight in forming saturated synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS552031A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4581443A (en) * | 1984-10-09 | 1986-04-08 | Celanese Corporation | Production of improved pellets from melt-processable polymer which is capable of forming and anisotropic melt |
| DE4034459A1 (en) * | 1990-10-30 | 1992-05-07 | Hoechst Ag | METHOD FOR TREATING THERMALLY STRESSED POLYESTER WASTE |
| JP4524545B2 (en) * | 2003-06-30 | 2010-08-18 | 東洋紡績株式会社 | Method for producing polyester resin varnish |
| CN102093590B (en) * | 2010-12-01 | 2012-05-30 | 宁波大发化纤有限公司 | Waste plastic conditioning and viscosity modifying system |
-
1978
- 1978-06-20 JP JP7457878A patent/JPS552031A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS552031A (en) | 1980-01-09 |
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