JP2958642B1 - Method for producing vinyl chloride regenerated resin - Google Patents
Method for producing vinyl chloride regenerated resinInfo
- Publication number
- JP2958642B1 JP2958642B1 JP10283314A JP28331498A JP2958642B1 JP 2958642 B1 JP2958642 B1 JP 2958642B1 JP 10283314 A JP10283314 A JP 10283314A JP 28331498 A JP28331498 A JP 28331498A JP 2958642 B1 JP2958642 B1 JP 2958642B1
- Authority
- JP
- Japan
- Prior art keywords
- resin
- vinyl chloride
- group
- plasticizer
- material pieces
- 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
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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
【要約】
【課題】加熱温度を上げたり加熱時間を長くすることな
く、溶融温度帯の異なる原料塩化ビニル製品を原料とし
た塩化ビニル系再生樹脂の製造方法を提供すること。
【解決手段】押出機11の主射出部12の第1のシリン
ダ17内に硬質塩化ビニル系樹脂を主体とした第1群の
樹脂材料片を投入し、副射出部13の第2のシリンダ3
2内に軟質塩化ビニル系樹脂を主体とした第2群の樹脂
材料片を投入する。それぞれのシリンダ17,32内で
投入した材料片を混練して別個に溶融させ、合流させて
混練し塩化ビニル系再生樹脂としてダイ16から押し出
す。An object of the present invention is to provide a method for producing a vinyl chloride-based regenerated resin from a raw material of a vinyl chloride product having a different melting temperature range without increasing a heating temperature or elongating a heating time. A first group of resin material pieces mainly composed of hard vinyl chloride resin is charged into a first cylinder (17) of a main injection part (12) of an extruder (11), and a second cylinder (3) of a sub injection part (13) is provided.
A second group of resin material pieces mainly composed of a soft vinyl chloride resin is charged into the inside of the resin material 2. The material pieces charged in the respective cylinders 17 and 32 are kneaded and melted separately, merged and kneaded, and extruded from the die 16 as a vinyl chloride-based regenerated resin.
Description
【0001】[0001]
【発明の属する技術分野】 本発明は、塩化ビニル系樹
脂製品を溶融させ混練して塩化ビニル系再生樹脂を製造
する製造方法に関するものである。The present invention relates to a method for producing a vinyl chloride-based regenerated resin by melting and kneading a vinyl chloride-based resin product.
【0002】[0002]
【従来の技術】 塩化ビニル系樹脂は可塑剤の適用で軟
質から硬質までいろいろな硬度の製品を製造することが
でき、大量生産に向きコストが安いため各種製品に幅広
く使用されている。このような塩化ビニル系樹脂は一般
にパウダー状の塩化ビニル樹脂原料(これを原料レジン
という)に副材料として可塑剤、安定剤、増量剤、顔料
等を混合した後、混練してペレット状或いはパウダー状
に加工した樹脂(以下これを塩化ビニル系樹脂という)
を改めて成型装置に投入し用途に応じてカレンダ加工、
押出し加工、射出成型等によって成型品を得るようにな
っている。このように成型された製品は原料レジンの重
合度や可塑剤の配合率の違いによって硬質と軟質の塩化
ビニル系樹脂製品に大別されることとなる。ところで、
近年環境汚染を防止する観点から合成樹脂の再利用が求
められており、塩化ビニル系樹脂製品も例外ではない。
そのため、使用済みの塩化ビニル系樹脂製品を押出機等
で再度融かし塩化ビニル系再生樹脂を得るようにし、こ
れを使用して再びいわゆる塩化ビニル製の再加工品を作
っている。2. Description of the Related Art Vinyl chloride resins can be used to produce products of various hardnesses from soft to hard by applying a plasticizer, and are widely used in various products because of their low cost and suitable for mass production. Such a vinyl chloride resin is generally mixed with a powdery vinyl chloride resin raw material (this is referred to as a raw material resin), as a secondary material, with a plasticizer, a stabilizer, a bulking agent, a pigment, etc., and then kneaded to form a pellet or powder. Shaped resin (hereinafter referred to as vinyl chloride resin)
Again into the molding machine, and calendar processing according to the application,
A molded product is obtained by extrusion, injection molding, or the like. Products molded in this way are roughly classified into hard and soft vinyl chloride resin products depending on the degree of polymerization of the raw resin and the mixing ratio of the plasticizer. by the way,
In recent years, reuse of synthetic resins has been required from the viewpoint of preventing environmental pollution, and vinyl chloride resin products are no exception.
Therefore, a used vinyl chloride resin product is melted again by an extruder or the like to obtain a vinyl chloride regenerated resin, which is used to produce a so-called reprocessed product made of vinyl chloride again.
【0003】[0003]
【発明が解決しようとする課題】ところが、上記のよう
に塩化ビニル系樹脂は可塑剤の適用で軟質から硬質まで
幅広い製品が製造可能であるため、再生塩化ビニル製品
の原料としての塩化ビニル系樹脂製品(以下原料塩化ビ
ニル製品という)をまったく分別せずに使用する場合に
は次のような不具合が生じてしまう。However, as described above, a wide range of products from soft to hard can be produced by applying a plasticizer to the vinyl chloride resin, so that the vinyl chloride resin is used as a raw material of a recycled vinyl chloride product. If a product (hereinafter referred to as a raw vinyl chloride product) is used without any separation, the following problems occur.
【0004】軟質と硬質の原料塩化ビニル製品を薄手の
ものであればそのまま、厚手のものであれば粉砕あるい
は細かく裁断して細片化し、例えば押出機内で溶融させ
る。すると、軟質の原料塩化ビニル製品は可塑剤が多く
含まれているため装置内での流動性がよく早く溶解する
傾向にある。一方、硬質の原料塩化ビニル製品は可塑剤
が少ないため溶解しにくい傾向にある。そのため両原料
塩化ビニル製品が混交した状態で先に軟質の原料塩化ビ
ニル製品が溶融すると硬質の原料塩化ビニル製品はあた
かもこの溶解した軟質の原料塩化ビニル製品中に浮遊す
るような状態となる。すると、硬質の原料塩化ビニル製
品は容易に溶解せずかえって条件によってはその溶解能
は硬質の原料塩化ビニル製品単体での溶解能と比べても
劣る場合があった。[0004] If the soft and hard raw vinyl chloride product is thin, it is cut as it is, and if it is thick, it is pulverized or cut into small pieces and melted in, for example, an extruder. Then, since the soft raw material vinyl chloride product contains a large amount of a plasticizer, the flowability in the device tends to be good and to be dissolved quickly. On the other hand, hard raw vinyl chloride products tend to be difficult to dissolve due to the small amount of plasticizer. Therefore, if the soft raw vinyl chloride product is melted first in a state where both raw vinyl chloride products are mixed, the hard raw vinyl chloride product will be in a state as if floating in the dissolved soft raw vinyl chloride product. As a result, the hard raw vinyl chloride product was not easily dissolved, and depending on the conditions, the dissolving ability was sometimes inferior to that of the hard raw vinyl chloride product alone.
【0005】この場合には混練時間を増やすことで、つ
まり加熱時間を長くすることで硬質の原料塩化ビニル製
品も最終的には溶解させることができるのであるが、長
時間の加熱は樹脂の劣化や樹脂が分解して脱塩素化を招
来することとなり望ましくない。また、加熱温度を上げ
ることも考えられるが同様に樹脂の劣化や分解を招来す
ることとなる。更に、硬質の原料塩化ビニル製品を上記
原料レジンのようにパウダー状或いはごく小粒のペレッ
ト状として軟質の原料塩化ビニル製品に混入すれば溶け
やすくてよいのであるが、硬質の原料塩化ビニル製品を
わざわざパウダー状やペレット状としなくてはならず非
常に手間であるしコスト的に見合うものではない。In this case, by increasing the kneading time, that is, by lengthening the heating time, the hard raw vinyl chloride product can be finally dissolved, but the prolonged heating deteriorates the resin. And the resin is decomposed to cause dechlorination, which is not desirable. It is also conceivable to increase the heating temperature, but similarly, it causes deterioration and decomposition of the resin. Furthermore, if the hard raw vinyl chloride product is mixed with the soft raw vinyl chloride product in the form of powder or very small pellets as in the above-mentioned raw resin, it can be easily dissolved. It must be in the form of powder or pellets, which is very troublesome and not cost-effective.
【0006】本発明は、このような従来の技術に存在す
る問題点に着目してなされたものである。その目的とす
るところは、加熱温度を上げたり加熱時間を長くするこ
となく、溶融温度帯の異なる原料塩化ビニル製品を原料
として塩化ビニル系再生樹脂を製造する製造方法を提供
することにある。The present invention has been made by paying attention to such problems existing in the prior art. It is an object of the present invention to provide a production method for producing a vinyl chloride-based regenerated resin from raw vinyl chloride products having different melting temperatures without increasing the heating temperature or the heating time.
【0007】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、請求項1に記載の発明では、異なる温度帯域で溶
融する複数の群に分別された塩化ビニル系樹脂を主体と
した樹脂材料片を各群毎に別個の加熱室内で加熱しなが
ら混練装置にて混練して溶融させるとともに、溶融した
各群の溶融材料を合流させて混練装置にて加熱下で混練
してほぼ均質な塩化ビニル系再生樹脂を製造するように
したことを要旨とする。請求項2に記載の発明では、硬
質塩化ビニル系樹脂を主体とした第1群の樹脂材料片を
第1の加熱室内に導入し加熱下で混練装置にて混練して
溶融させるとともに、軟質塩化ビニル系樹脂を主体とし
た第2群の樹脂材料片を第2の加熱室内に導入し加熱下
で混練装置にて混練して溶融させ、溶融した両材料を合
流させて両材料を混練装置にて加熱下で混練してほぼ均
質な塩化ビニル系再生樹脂を製造するようにしたことを
要旨とする。In order to achieve the above object, according to the first aspect of the present invention, a resin material mainly composed of a vinyl chloride resin divided into a plurality of groups which melts in different temperature zones. While heating the pieces in separate heating chambers for each group, they are kneaded and melted by a kneading device, and the molten materials of each group are combined and kneaded under heating by a kneading device to obtain substantially uniform chloride. The gist of the present invention is to manufacture a vinyl-based recycled resin. According to the second aspect of the present invention, a first group of resin material pieces mainly composed of a hard vinyl chloride resin is introduced into a first heating chamber, kneaded and melted by a kneading device under heating, and soft A second group of resin material pieces mainly composed of a vinyl resin is introduced into a second heating chamber, kneaded and melted by a kneading device under heating, and the two melted materials are combined to form a kneading device. The gist of the present invention is to produce a substantially homogeneous vinyl chloride regenerated resin by kneading under heating.
【0008】ここに原料塩化ビニル製品としては原料レ
ジンを基に新たに製造された製品と既に一度再生された
製品のいずれをも含む。原料塩化ビニル製品としては、
まず基本的に原料レジンに副材料として可塑剤、安定
剤、増量剤、顔料等を混合して得られた塩化ビニル系樹
脂をカレンダ加工、押出し加工、射出成型等によって得
られた成型品が挙げられる。塩化ビニル系樹脂の原料レ
ジンとしては、塩化ビニルの重合体だけでなく他のコモ
ノマー(スチレン、メチルアクリレート、アクリロニト
リル、塩化ビニリデン、無水マレイン酸、イソブチレ
ン、2-クロロアセテート、酢酸ビニル等)との共重合
体も含まれる。原料レジンの重合度は様々であり、低重
合度(700〜900程度)、中重合度(1000〜1
500程度)、高重合度(2000〜3000程度)の
各重合体が製品の用途に応じて広く分布する。更に、塩
化ビニルとの相溶性のよいプラスチック改質剤としてA
BS(アクリロニトリル・ブタジエン・スチレン三元重
合体)、MBS(メチルメタクレール・ブタジエン・ス
チレン三元重合体)、塩素化ポリエチレン等が添加され
ることもある。Here, the raw vinyl chloride product includes both a product newly manufactured based on a raw resin and a product which has already been recycled. As a raw material PVC product,
Firstly, molded products obtained by calendering, extruding, injection molding, etc., a vinyl chloride resin obtained by mixing a plasticizer, a stabilizer, a bulking agent, a pigment, etc. as a secondary material in a raw material resin are listed. Can be As raw material resin for vinyl chloride resin, not only vinyl chloride polymer but also other comonomers (styrene, methyl acrylate, acrylonitrile, vinylidene chloride, maleic anhydride, isobutylene, 2-chloroacetate, vinyl acetate, etc.) Polymers are also included. The degree of polymerization of the raw resin varies, and the degree of polymerization is low (about 700 to 900), medium degree (1000 to 1).
Each polymer having a high degree of polymerization (about 500) and a high degree of polymerization (about 2000 to 3000) is widely distributed depending on the use of the product. Further, as a plastic modifier having good compatibility with vinyl chloride, A
BS (acrylonitrile-butadiene-styrene terpolymer), MBS (methylmethclair-butadiene-styrene terpolymer), chlorinated polyethylene, and the like may be added.
【0009】副材料としての可塑剤としては、例えばジ
オクチルアジペート(DOA)のようなアジピン酸エス
テル系、ジデシルフタレート(DDP)、ジオクチルフ
タレート(DOP)、ジブチルフタレート(DBP)等
のフタル酸エステル系、トリクレジルホスフェート(T
CP)のようなリン酸エステル系、更にエポキシ化植物
油、ニトリル系合成ゴム等が挙げられる。副材料として
の安定剤としては、例えば鉛塩系(鉛白、二塩基性亜リ
ン酸等)、金属石鹸(鉛、カドミウム、亜鉛等の金属と
ステアリン酸、ウラリン酸等との石鹸)、有機スズ安定
剤、エポキシ安定剤、有機亜リン酸化合物等が挙げられ
る。副材料としての増量剤としては、例えば炭酸カルシ
ウム、クレー、シリカ等が挙げられる。その他、副材料
としては滑剤や顔料、場合によっては難燃剤や発泡剤や
防かび剤が混入される。Examples of the plasticizer as an auxiliary material include adipate esters such as dioctyl adipate (DOA), and phthalate esters such as didecyl phthalate (DDP), dioctyl phthalate (DOP) and dibutyl phthalate (DBP). , Tricresyl phosphate (T
Examples thereof include phosphate esters such as CP), epoxidized vegetable oils, and nitrile-based synthetic rubbers. As a stabilizer as an auxiliary material, for example, a lead salt (lead white, dibasic phosphorous acid, etc.), metal soap (soap with a metal such as lead, cadmium, zinc, etc. and stearic acid, uraric acid, etc.), organic Examples include tin stabilizers, epoxy stabilizers, and organic phosphite compounds. Examples of the extender as an auxiliary material include calcium carbonate, clay, and silica. In addition, a lubricant and a pigment, and in some cases, a flame retardant, a foaming agent, and a fungicide are mixed as auxiliary materials.
【0010】原料塩化ビニル製品はこのような諸材料を
含むが、その熱可塑性に影響するのは塩化ビニルの重合
度と可塑剤の配合割合である。特に可塑剤の配合割合は
大きく可塑性に影響する。塩化ビニルは熱可塑性、加熱
によって分子間力が小さくなり流動性が現れる。そのた
め重合度が高くなる程分子間力は大きく流動性は劣る傾
向にある。一方、可塑剤は分子間力を弱める働きがあ
り、可塑剤を加えると流動性が増すこととなる。また、
可塑剤の配合割合が増すと流動温度が下がることとな
る。一方、この可塑剤の添加割合が増えることでと製品
自体が柔らかく可撓性を有するようになる。尚、可塑剤
を加えない状態において塩化ビニル樹脂の流動温度以上
に加熱すると加熱分解の危険性があるため、この点でも
可塑剤を加える必要が生じる。The starting vinyl chloride product contains such materials, but the thermoplasticity thereof is affected by the degree of polymerization of vinyl chloride and the blending ratio of the plasticizer. Particularly, the mixing ratio of the plasticizer greatly affects the plasticity. Vinyl chloride has thermoplasticity, and the intermolecular force is reduced by heating, and fluidity appears. Therefore, as the degree of polymerization increases, the intermolecular force tends to increase and the fluidity tends to deteriorate. On the other hand, the plasticizer has a function of weakening the intermolecular force, and the addition of the plasticizer increases the fluidity. Also,
As the blending ratio of the plasticizer increases, the flow temperature decreases. On the other hand, if the addition ratio of the plasticizer increases, the product itself becomes soft and flexible. If the plasticizer is heated to a temperature higher than the flowing temperature of the vinyl chloride resin without adding a plasticizer, there is a risk of thermal decomposition. Therefore, it is necessary to add a plasticizer also in this regard.
【0011】このような可塑剤の性質から、原料塩化ビ
ニル製品を異なる温度帯域で溶融する複数の群に分別す
る場合にはいくつかの方法が考えられる。第1の分別方
法として原料塩化ビニル製品毎に溶解温度を前もって測
定し、溶解温度にしたがって複数の群に分別するように
する方法である。第2の分別方法として一般に大別され
ている軟質製品と硬質製品について硬質塩化ビニル系樹
脂を主体とした第1群の樹脂材料片と、軟質塩化ビニル
系樹脂を主体とした第2群の樹脂材料片とに分別し、各
群毎の溶解温度を測定する方法である。第1の分別方法
は複数種類の原料塩化ビニル製品がそれぞれ大量に得ら
れる場合に有効であり、溶融する温度帯域もかなり限定
的に定めることが可能となる。第2の分別方法は塩化ビ
ニル系樹脂製品において一般に可塑剤の配合量によって
大別されている軟質製品と硬質製品に区別するものであ
り個々の製品の溶融する温度帯域を測定する必要はない
ものの、第1の分別方法よりも溶融する温度帯域に幅が
でる。Due to the nature of such a plasticizer, several methods are conceivable for separating the raw vinyl chloride product into a plurality of groups which are melted in different temperature zones. As a first sorting method, a melting temperature is measured in advance for each raw vinyl chloride product, and the product is separated into a plurality of groups according to the melting temperature. As a second sorting method, a first group of resin material pieces mainly composed of a hard vinyl chloride resin and a second group resin mainly composed of a soft vinyl chloride resin for soft products and hard products which are generally roughly classified. This is a method of measuring the melting temperature of each group by separating the material into material pieces. The first fractionation method is effective when a plurality of types of raw material vinyl chloride products are obtained in large quantities, and the temperature range in which melting is performed can be determined quite limited. The second fractionation method distinguishes between a soft product and a hard product, which are generally classified by the amount of a plasticizer in a vinyl chloride resin product, and it is not necessary to measure the melting temperature range of each product. The temperature zone where the melting is performed is wider than in the first sorting method.
【0012】上記のように第1群の樹脂材料片と第2群
の樹脂材料片とに分別溶融する場合に溶解温度がごく近
い複数の組成の塩化ビニル系樹脂製品同士であればあえ
て分別しなくともよい。多少溶融する温度帯域に幅がで
るものの一緒に溶融させることは可能である。逆にいえ
ば、同一群中に溶解温度が他の樹脂に比べてかなり高い
塩化ビニル系樹脂製品が混ざることはその樹脂製品を溶
かすために長時間の加熱又は高温での加熱を行わなけれ
ばならず樹脂劣化や分解が生じる。そのため同一群中に
複数の組成の塩化ビニル系樹脂製品同士を含める場合に
は溶解温度が近いものでまとめる必要がある。逆に、溶
解温度が異なり一緒に溶解させると上記のような不具合
が生じるようであればその塩化ビニル系樹脂製品は別の
群として別個に溶融させる必要がある。上記のように溶
解温度は可塑剤の配合割合に対して負の相関関係にある
ため、可塑剤の配合割合の近いもの同士まとめて1つの
群としてもよい。この時、可塑剤の配合割合の高いもの
(軟質塩化ビニル系樹脂)は可塑剤の配合割合がかなり
違っても1群としやすく、可塑剤の配合割合の低いもの
(硬質塩化ビニル系樹脂)は可塑剤の配合割合が近いも
のでなければ1群としにくい傾向にある。また、可塑剤
と硬度との関係は重要である。可塑剤が少ないほど塩化
ビニル系樹脂製品は高硬度となり可塑剤が含まれていく
程に徐々に可撓性を有していく。但し可撓性は純粋に硬
度だけの問題ではなく、製品の形状、塩化ビニルの重合
度等も要因となる。[0012] As described above, when the first and second resin material pieces are separately separated and melted, if the polyvinyl chloride resin products having a plurality of compositions whose melting temperatures are very close to each other, they are deliberately separated. It is not necessary. It is possible to melt together with a certain temperature zone that has a certain temperature range. Conversely, if a vinyl chloride resin product whose melting temperature is significantly higher than other resins is mixed in the same group, it must be heated for a long time or at a high temperature to melt the resin product. Resin degradation and decomposition occur. Therefore, when vinyl chloride resin products having a plurality of compositions are included in the same group, it is necessary to put together products having similar dissolution temperatures. Conversely, if the above-mentioned problems occur if the melting temperatures are different and they are melted together, the vinyl chloride resin products need to be separately melted as a separate group. As described above, since the dissolution temperature has a negative correlation with the mixing ratio of the plasticizer, those having similar mixing ratios of the plasticizer may be grouped into one group. At this time, those having a high plasticizer compounding ratio (soft vinyl chloride resin) are easily combined into one group even if the plasticizer compounding ratio is considerably different, and those having a low plasticizer compounding ratio (hard vinyl chloride resin) Unless the blending ratio of the plasticizer is close, it tends to be difficult to form a group. The relationship between the plasticizer and the hardness is important. The less the plasticizer, the higher the hardness of the vinyl chloride resin product becomes, and the more the plasticizer is included, the more gradually the product becomes flexible. However, flexibility is not only a matter of pure hardness, but also depends on the shape of the product, the degree of polymerization of vinyl chloride, and the like.
【0013】一般に可塑剤の添加量が0以上10重量パ
ーセント未満のものを硬質塩化ビニル系樹脂とし、10
以上30重量パーセント未満のものを半硬質塩化ビニル
系樹脂とし、30重量パーセント以上のものを軟質塩化
ビニル系樹脂とする。但し、軟質か硬質かは相対的要素
が大きく、なおかつ形状的要素も加わるため必ずしもこ
の一般的定義にはよらない。例えば、上記軟質塩化ビニ
ル系樹脂とされる可塑剤の添加量であっても可塑剤の添
加量が非常に多いものから見れば30重量パーセント以
上の可塑剤を含有しており、なおかつかさばる形状の製
品であれば硬質或いは半硬質塩化ビニル系樹脂と称する
こともある。また、硬質〜半硬質間、及び半硬質〜軟質
間の線引きは微妙であり、特に上記可塑剤の添加量の数
値が絶対的なものではない。更に、原料レジンの重合度
によっては可塑剤の量が少なくとも軟質塩化ビニル系樹
脂に分類されることも、逆に可塑剤の量が多くとも硬質
或いは半硬質塩化ビニル系樹脂に分類されることもあ
る。本発明において重要なことは、原料塩化ビニル製品
において所定の温度領域で溶融する所定範囲の可塑剤添
加量の群とそれとは異なる所定の温度領域で溶融する所
定範囲の可塑剤添加量の群とに分けることである。In general, a plasticizer containing 0 to less than 10% by weight of a plasticizer is defined as a hard vinyl chloride resin.
Those having less than 30% by weight are semi-rigid vinyl chloride resins, and those having 30% by weight or more are soft vinyl chloride resins. However, whether the material is soft or hard is not always based on this general definition because a relative element is large and a shape element is added. For example, even if the amount of the plasticizer to be the above-mentioned soft vinyl chloride resin is included, the plasticizer contains 30% by weight or more of the plasticizer when viewed from the very large amount of the plasticizer, and the bulky shape If it is a product, it may be called a hard or semi-hard vinyl chloride resin. The drawing between hard and semi-hard and between semi-hard and soft is delicate, and the numerical value of the amount of the plasticizer added is not absolute. Further, depending on the degree of polymerization of the raw resin, the amount of the plasticizer may be at least classified as a soft vinyl chloride resin, or conversely, the amount of the plasticizer may be classified as a hard or semi-hard vinyl chloride resin at most. is there. What is important in the present invention is that, in the raw material vinyl chloride product, a group of a predetermined range of plasticizer addition amount that melts in a predetermined temperature range and a group of a predetermined range of plasticizer addition amount that melts in a predetermined temperature range different from that. It is divided into.
【0014】一般的に軟質塩化ビニル系樹脂に含まれる
製品として例えばフィルム、シート等が挙げられる。フ
ィルム、シート等の例として食品包装用フィルム、温室
用シート、農業用シート、車両用シート材、ホースチュ
ーブ、建材用発泡シート、床材、鞄、履き物、手袋等が
挙げられる。また、硬質熱可塑性樹脂材料としては、水
道用パイプ、工業用板材、アーケード等の建材、食品用
計量ケース、味付け海苔等食品用の容器、シャンプー等
非食品用の容器、軽量トレイ等各種工業製品の容器等が
挙げられる。これらは上記のように可塑剤の添加量によ
っては軟質塩化ビニル系樹脂であっても半硬質塩化ビニ
ル系樹脂に分類されることもあり、逆に硬質熱可塑性樹
脂材料であっても半硬質塩化ビニル系樹脂に分類される
こともあるため絶対的なものではない。Generally, products included in the soft vinyl chloride resin include, for example, films and sheets. Examples of films, sheets and the like include food packaging films, greenhouse sheets, agricultural sheets, vehicle sheet materials, hose tubes, foam sheets for building materials, flooring, bags, footwear, gloves, and the like. In addition, as the hard thermoplastic resin material, various industrial products such as water pipes, industrial board materials, building materials such as arcades, measuring cases for food, containers for foods such as seasoned laver, containers for non-foods such as shampoo, lightweight trays, and the like. And the like. Depending on the amount of the plasticizer added, these may be classified as soft vinyl chloride resins or semi-rigid vinyl chloride resins. It is not absolute because it is sometimes classified as a vinyl resin.
【0015】[0015]
【発明の効果】請求項1の発明では各郡毎に樹脂材料片
を別個に溶解してから混ぜるようにしているため、いず
れか溶解温度の高い樹脂材料片が溶けずに残ることがな
く均質な再生樹脂が得られるとともに、塩化ビニル系再
生樹脂の劣化も極力抑制することができる。請求項2の
発明では硬質塩化ビニル系樹脂と軟質塩化ビニル系樹脂
とをそれぞれ別個に溶解してから混ぜるようにしている
ため、硬質塩化ビニル系樹脂が溶けずに残ることがなく
均質な再生樹脂が得られるとともに、塩化ビニル系再生
樹脂の劣化も極力抑制することができる。According to the first aspect of the present invention, the resin material pieces are separately dissolved and then mixed for each group, so that any one of the resin material pieces having a high melting temperature does not remain without melting and is homogeneous. In addition to obtaining a regenerated resin, deterioration of the vinyl chloride-based regenerated resin can be suppressed as much as possible. According to the second aspect of the present invention, the hard vinyl chloride resin and the soft vinyl chloride resin are separately dissolved and then mixed, so that the hard vinyl chloride resin does not remain undissolved and is homogeneously recycled resin. And the deterioration of the vinyl chloride regenerated resin can be suppressed as much as possible.
【0016】[0016]
【発明の実施の形態】以下、本発明を具体化した実施の
形態を図1及び図2に基づいて説明する。本発明の混合
熱可塑性樹脂を製造する押出機11は主射出部12と副
射出部13とより構成されている。主射出部12におい
て第1の加熱室としての第1のシリンダ本体17は断面
円形の中空の管体であって、同第1のシリンダ本体17
の先端には押し出し成型用のダイ16が装着されてい
る。第1のシリンダ本体17の基部には第1のシリンダ
本体17内部に原料を導くホッパ22が装着されてい
る。第1のシリンダ本体17の外周には第1のシリンダ
本体17を加熱する複数のバンドヒータ18a〜18j
が装着されている。各バンドヒータ18a〜18jには
隣接位置に熱電対よりなる温度センサ19が配設されて
いる。第1のシリンダ本体17内には混練装置としての
スクリュ20が配設されている。スクリュ20の外周に
はスクリュ溝21が螺旋状に形成されている。スクリュ
20の先端は円錐状のスクリュヘッド23とされ、スク
リュ20の基端は図示しないスクリュ駆動軸を介して油
圧モータ25に接続されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The extruder 11 for producing the mixed thermoplastic resin of the present invention includes a main injection section 12 and a sub-injection section 13. In the main injection section 12, a first cylinder body 17 as a first heating chamber is a hollow tubular body having a circular cross section.
A die 16 for extrusion molding is attached to the tip of the. At the base of the first cylinder body 17, a hopper 22 for guiding the raw material into the first cylinder body 17 is mounted. A plurality of band heaters 18a to 18j for heating the first cylinder body 17 are provided on the outer periphery of the first cylinder body 17.
Is installed. A temperature sensor 19 composed of a thermocouple is disposed adjacent to each of the band heaters 18a to 18j. A screw 20 as a kneading device is provided in the first cylinder body 17. A screw groove 21 is spirally formed on the outer periphery of the screw 20. The distal end of the screw 20 is a conical screw head 23, and the proximal end of the screw 20 is connected to a hydraulic motor 25 via a screw drive shaft (not shown).
【0017】主射出部12に対して約30度の角度をも
って副射出部13が配設されている。第2の加熱室とし
ての第2のシリンダ本体32は断面円形の中空の管体で
あって、同第2のシリンダ本体32の先端は前記第1の
シリンダ本体17の側部中央付近に連通されている。本
実施の形態における両シリンダ本体17, 32のなす角
度は約30度であるがこの角度は変更可能である。The sub-injection unit 13 is disposed at an angle of about 30 degrees with respect to the main injection unit 12. The second cylinder body 32 as a second heating chamber is a hollow tubular body having a circular cross section, and the tip of the second cylinder body 32 is communicated with the vicinity of the center of the side of the first cylinder body 17. ing. Although the angle between the two cylinder bodies 17 and 32 in the present embodiment is about 30 degrees, this angle can be changed.
【0018】同シリンダ本体32の基部にはシリンダ本
体32内部に原料を導くホッパ33が装着されている。
シリンダ本体32の外周にはシリンダ本体32を加熱す
る複数のバンドヒータ35a〜35dが装着されてい
る。各バンドヒータ35a〜35dには隣接位置に熱電
対よりなる温度センサ36が配設されている。シリンダ
本体32内には混練装置としてのスクリュ37が配設さ
れている。スクリュ37の外周にはスクリュ溝38が螺
旋状に形成されている。スクリュ37の基端は図示しな
いスクリュ駆動軸を介して油圧モータ39に接続されて
いる。At the base of the cylinder body 32, a hopper 33 for guiding the raw material into the cylinder body 32 is mounted.
A plurality of band heaters 35a to 35d for heating the cylinder body 32 are mounted on the outer periphery of the cylinder body 32. A temperature sensor 36 composed of a thermocouple is disposed adjacent to each of the band heaters 35a to 35d. A screw 37 as a kneading device is provided in the cylinder main body 32. A screw groove 38 is spirally formed on the outer periphery of the screw 37. The proximal end of the screw 37 is connected to a hydraulic motor 39 via a screw drive shaft (not shown).
【0019】第1のシリンダ本体17において第1のシ
リンダ本体17と第2のシリンダ本体32との連結部よ
りも後方は第1群の樹脂材料片の混練を行う第1の混練
部41とされている。第2のシリンダ本体32は第2群
の樹脂材料片の混練を行う第2の混練部42とされてい
る。第1のシリンダ本体17において第1の混練部41
の前方は第1及び第2の混練部41, 42で混練され合
流した溶融樹脂の混練を行う第3の混練部43とされて
いる。第3の混練部43で混練された溶融樹脂はスクリ
ュ20の押し出し力によってダイ16から外部へ押し出
される。本実施の形態ではダイ16には断面円形状の複
数の押出用通路16aが形成されている。A first kneading portion 41 for kneading the first group of resin material pieces is provided behind the connecting portion between the first cylinder body 17 and the second cylinder body 32 in the first cylinder body 17. ing. The second cylinder main body 32 is a second kneading section 42 for kneading the second group of resin material pieces. The first kneading unit 41 in the first cylinder body 17
A third kneading section 43 for kneading the molten resin kneaded and joined at the first and second kneading sections 41 and 42 is provided in front of the first kneading section. The molten resin kneaded in the third kneading section 43 is pushed out of the die 16 by the pushing force of the screw 20. In the present embodiment, a plurality of extrusion passages 16 a having a circular cross section are formed in the die 16.
【0020】このような押出機11を使用して混合樹脂
を製造し、更に再生チューブ製品を成型する作用につい
て説明する。まず、第1及び第2のシリンダ本体17,
32の各バンドヒータ18a〜18j, 35a〜35d
を所定の温度で加熱させる。同時に油圧モータ25, 3
9を駆動させて各スクリュ20, 37を回転させる。そ
して、それぞれ異なる温度帯域で溶融する塩化ビニル系
樹脂を主体とした2群の樹脂材料片A,Bを用意しホッ
パ22, 33から投入していく。第1群の樹脂材料片A
を第1の混練部41で混練し、第2群の樹脂材料片Bを
第2の混練部42で混練する。樹脂材料片A, Bはバン
ドヒータ18a〜18j, 35a〜35dによって加熱
された第1及び第2の混練部41, 42において溶融さ
れるとともにスクリュ20, 37によりほぼ均質となる
ように混練されながら前方に運ばれる。各々単独の群で
混練された溶融樹脂は、更に第1のシリンダ本体17の
第3の混練部43で合流してスクリュ20により混練さ
れる。そして、ダイ16からチューブ状に外部へ押し出
される。押し出されたチューブ状の再生樹脂は冷却さ
れ、更にペレット状にカットされて再加工品として得ら
れる。The operation of producing a mixed resin using such an extruder 11 and molding a recycled tube product will be described. First, the first and second cylinder bodies 17,
32 band heaters 18a to 18j, 35a to 35d
Is heated at a predetermined temperature. At the same time, hydraulic motors 25, 3
9 is driven to rotate each screw 20, 37. Then, two groups of resin material pieces A and B mainly composed of a vinyl chloride resin that melts in different temperature zones are prepared, and are charged from the hoppers 22 and 33. First group of resin material pieces A
Are kneaded in the first kneading section 41, and the second group of resin material pieces B are kneaded in the second kneading section 42. The resin material pieces A and B are melted in the first and second kneading units 41 and 42 heated by the band heaters 18a to 18j and 35a to 35d, and are kneaded by the screws 20 and 37 so as to be substantially uniform. Carried forward. The molten resin kneaded in a single group is further joined in the third kneading section 43 of the first cylinder body 17 and kneaded by the screw 20. Then, it is pushed out of the die 16 into a tube shape. The extruded tubular resin is cooled, cut into pellets, and obtained as a reworked product.
【0021】[0021]
【実施例】第1群の樹脂材料片A及び第2群の樹脂材料
片Bとしてそれぞれ試料1〜5から選択された2種のを
使用した。本実施例における第1のシリンダ本体17及
び第2のシリンダ本体32の内径はそれぞれ100mm
とし、第1の混練部41の長さPは800mm、第2の
混練部42の長さQは800mm、第3の混練部43の
長さPは900mmに設計した。また、各スクリュ2
0、37は径90mmのものを使用し、スクリュ速度は
5〜20rpmとした。本実施例における押出機の最大
押し出し能力は150kg/hrであった。このような
条件の下、更にバンドヒータ18a〜18j, 35a〜
35dによって前もって十分第1及び第2のシリンダ本
体17、32を加熱した状態でスクリュ速度と第1のシ
リンダ本体17及び第2のシリンダ本体32への投入量
を調整しながら作業を行った。EXAMPLES Two types of resin material pieces A selected from samples 1 to 5 were used as a first group of resin material pieces A and a second group of resin material pieces B, respectively. The inner diameters of the first cylinder body 17 and the second cylinder body 32 in this embodiment are each 100 mm.
The length P of the first kneading section 41 was designed to be 800 mm, the length Q of the second kneading section 42 was set to 800 mm, and the length P of the third kneading section 43 was designed to be 900 mm. In addition, each screw 2
For 0 and 37, those having a diameter of 90 mm were used, and the screw speed was 5 to 20 rpm. The maximum extrusion capacity of the extruder in this example was 150 kg / hr. Under such conditions, the band heaters 18a to 18j, 35a to
The work was performed while the first and second cylinder bodies 17 and 32 were sufficiently heated in advance by 35d, while adjusting the screw speed and the amount of injection into the first cylinder body 17 and the second cylinder body 32.
【0022】また、本実施例ではバンドヒータ18a〜
18j, 35a〜35dの温度設定は可塑剤の含有量が
多いほど(硬度が低いほど)低く設定し、可塑剤の含有
量が少ないほど(硬度が高いほど)高く設定した。ま
た、投入位置(ホッパ22、33位置)から合流地点に
向かって徐々に高温となるように設定した。そして、合
流後はダイ16に向かって徐々に温度を下げていくよう
にした。また、第3の混練部43では第1及び第2の混
練部41, 42から送り出された溶融樹脂の配合割合に
応じて温度設定した。例えば、第1の混練部41におけ
るバンドヒータ18a〜18dでは合流地点直前(バン
ドヒータ18dの位置)では190度Cで加熱し、第2
の混練部42におけるバンドヒータ 35a〜35dで
は合流地点直前(バンドヒータ38dの位置)では15
0度Cで加熱しているものとする。この時、第1群の樹
脂材料片Aと第2群の樹脂材料片Bが均等の配合割合で
送り出されているのであれば、合流地点(バンドヒータ
18eの位置)での加熱温度は両者の中間温度、すなわ
ち170度Cに設定し以後徐々にダイ16方向に向かっ
て温度を下げるようにした。In the present embodiment, the band heaters 18a to 18a
The temperature setting of 18j, 35a to 35d was set lower as the content of the plasticizer was higher (the lower the hardness), and was set higher as the content of the plasticizer was lower (the higher the hardness). Further, the temperature was set so that the temperature gradually increased from the charging position (the positions of the hoppers 22 and 33) toward the junction. After the merging, the temperature was gradually lowered toward the die 16. In the third kneading section 43, the temperature was set in accordance with the mixing ratio of the molten resin sent from the first and second kneading sections 41 and 42. For example, the band heaters 18a to 18d in the first kneading unit 41 heat at 190 ° C. immediately before the merging point (the position of the band heater 18d),
In the band heaters 35a to 35d in the kneading section 42 of FIG.
It is assumed that heating is performed at 0 degree C. At this time, if the first group of resin material pieces A and the second group of resin material pieces B are sent out at an equal blending ratio, the heating temperature at the junction (the position of the band heater 18e) will be the same. The temperature was set to an intermediate temperature, that is, 170 ° C., and thereafter the temperature was gradually lowered toward the die 16.
【0023】また、本実施例では第1及び第2の混練部
41、42から送り出された溶融樹脂の配合割合が均等
ではない場合にはその割合に応じて合流地点の温度を設
定した。例えば、上記例で言えば、第1の混練部41か
ら25重量%、第2の混練部42から75重量%が合流
するのであれば、 190×0.25+150×0.75=160(度C) とする。In this embodiment, when the mixing ratio of the molten resin fed from the first and second kneading units 41 and 42 is not uniform, the temperature at the junction is set according to the mixing ratio. For example, in the above example, if 25% by weight from the first kneading section 41 and 75% by weight from the second kneading section 42 join, 190 × 0.25 + 150 × 0.75 = 160 (degrees C ).
【0024】[0024]
【表1】 [Table 1]
【0025】表1に試料1〜試料5及び比較試料1〜4
を示す。各試料の原料塩化ビニル製品として用意された
第1の材料片〜第3の材料片はいずれも出処の明確な可
塑剤の配合割合の均一な単一の使用済み製品を使用し
た。第1の材料片は使用済みホースを4〜6mm角に粉
砕したもので65〜74重量%(平均約70重量%程
度)の可塑剤が混入されている。硬度はスプリング式硬
度試験によって得られた硬さを採用した。硬さ約70H
s(JISA)とする。第2の材料片は使用済み農業用
シートをそのまま用い、26〜28重量%(平均約27
重量%程度)の可塑剤が混入されている。硬度は同じく
スプリング式硬度試験によって得られた硬さを採用し
た。硬さ約80Hs(JISA)とする。但し、同じ新
品のホース、農業用シートに対して使用済みのものでは
可塑剤が蒸発しているため正確な可塑剤量は得られず、
部位によっても蒸発量が異なるため上記値は幅のある値
となった。第3の材料片は使用済みパイプを4〜6mm
角程度に粉砕したもので可塑剤が混入されていなもので
ある。硬さ約100Hs(JISA)とする。Table 1 shows samples 1 to 5 and comparative samples 1 to 4.
Is shown. For each of the first to third material pieces prepared as the raw material vinyl chloride product of each sample, a single used product having a uniform mixing ratio of the plasticizer with a clear source was used. The first material piece is obtained by crushing a used hose into a 4 to 6 mm square, and contains 65 to 74% by weight (about 70% by weight on average) of a plasticizer. The hardness obtained by the spring type hardness test was adopted. Hardness about 70H
s (JISA). The second piece of material uses a used agricultural sheet as it is and is 26 to 28% by weight (about 27% on average).
(% By weight) of a plasticizer. As the hardness, a hardness obtained by a spring hardness test was also employed. The hardness is about 80 Hs (JISA). However, since the plasticizer has evaporated for the same new hose and used for agricultural sheets, the exact amount of plasticizer cannot be obtained.
Since the evaporation amount differs depending on the part, the above value has a wide value. The third piece of material is 4-6 mm of used pipe.
It is one that has been pulverized to a corner and does not contain a plasticizer. Hardness is about 100 Hs (JISA).
【0026】試料1〜試料5はこれら第1〜第3の材料
片をそのまま或いは可塑剤割合を調整するために原料レ
ジンを加えたものである。また、比較試料1〜4は第1
〜第3の材料片から選択された2又は3の材料片を複数
混ぜ合わせたものである。試料1〜試料5及び比較試料
1〜4について各試料をそれぞれ単独で溶解させ再生樹
脂を得た。その結果を◎:強度、外観とも良好、○:強
度、外観とも比較的良好、△:強度、外観が少し劣る、
×:強度、外観とも劣るで表示した。表1に示すように
試料1〜試料5で得られた再生樹脂の強度、外観はいず
れも良好であった。従って、可塑剤の含有量の同じ(或
いは極めて近い)使用済み塩化ビニル系樹脂では原料レ
ジンを使用した塩化ビニル系樹脂(つまり再生品ではな
いもの)と同様に加工することが可能である。Samples 1 to 5 are obtained by adding the raw resin to these first to third material pieces as they are or to adjust the ratio of the plasticizer. The comparative samples 1 to 4 are the first
A plurality of 2 or 3 material pieces selected from the third to third material pieces are mixed together. Each of the samples 1 to 5 and the comparative samples 1 to 4 was individually dissolved to obtain a regenerated resin. The results are as follows: :: good in strength and appearance, :: relatively good in strength and appearance, Δ: slightly poor in strength and appearance,
X: Inferior in both strength and appearance. As shown in Table 1, the strength and appearance of the recycled resins obtained in Samples 1 to 5 were all good. Therefore, a used vinyl chloride resin having the same (or very close) plasticizer content can be processed in the same manner as a vinyl chloride resin using a raw resin (that is, a non-recycled resin).
【0027】一方、比較試料1〜4では比較試料1につ
いて強度、外観が比較的良好であったに止まり、比較試
料2〜4はいずれも強度、外観とも劣る。従って、基本
的に異なる温度帯域で溶融する原料塩化ビニル製品を一
緒に混練することはできない。ここに、比較試料1につ
いて比較的良好であったのは可塑剤の性質に起因すると
考察される。表2のグラフに示すように可塑剤による軟
化効率は可塑剤配合割合の高い軟質塩化ビニル系樹脂ほ
ど劣る傾向にある。可塑剤は上記パイプの例で挙げたよ
うに0重量%では硬さ100Hs(JISA)を示す。
すなわち、極めて堅いガラスのような硬さを有する。と
ころが、農業用シートでは薄手であることもあるが可塑
剤は通常30重量%程度の含有率となりこの含有率では
硬さ80Hs(JISA)前後で十分な可撓性を有す
る。また、ホースでは農業用シートよりも肉厚となるた
めもう少し柔らかな硬さ70Hs(JISA)前後が求
められるがそのためには農業用シートの倍以上の通常7
0重量%程度の含有率が必要となる。On the other hand, in Comparative Samples 1 to 4, the strength and appearance of Comparative Sample 1 were relatively good, and Comparative Samples 2 to 4 were inferior in both strength and appearance. Therefore, it is not possible to knead together raw vinyl chloride products that melt in basically different temperature zones. Here, it is considered that the reason why the comparative sample 1 was relatively good is due to the properties of the plasticizer. As shown in the graph of Table 2, the softening efficiency by the plasticizer tends to be inferior for a soft vinyl chloride resin having a higher plasticizer compounding ratio. The plasticizer exhibits a hardness of 100 Hs (JISA) at 0% by weight as mentioned in the example of the pipe.
That is, it has the hardness of very hard glass. However, although the sheet for agricultural use may be thin, the content of the plasticizer is usually about 30% by weight, and the content is sufficiently flexible at a hardness of about 80 Hs (JISA). In addition, since the hose is thicker than the agricultural sheet, a slightly softer hardness of about 70 Hs (JISA) is required.
A content of about 0% by weight is required.
【0028】[0028]
【表2】 [Table 2]
【0029】すなわち、ある程度の柔らかさを得るまで
は可塑剤はそれほど多くなくともよいが、一旦柔らかく
なってからは軟化させるために可塑剤は多く必要となっ
てくる。そのため、2種類の使用済み塩化ビニル系樹脂
があったとして高硬度の場合には可塑剤の配合割合の差
は少なくとも一緒に溶融させることが困難となる傾向に
ある。一方、2種類の使用済み塩化ビニル系樹脂が軟質
塩化ビニル系樹脂であれば可塑剤含有量にかなり差があ
っても硬度に大きな差がないため一緒に溶融させること
が可能となる。硬度とその硬度において一緒に溶融され
ることが許される硬度の幅について表3のグラフに示
す。例えば、塩化ビニル系樹脂製品では硬さ100Hs
(JISA)では基本的に硬さ±4まで(+4はないた
め−4、つまり96Hs(JISA)まで)は同群とし
て扱っても再生樹脂の強度、外観は良好となる。また、
硬さ70Hs(JISA)では基本的に硬さ±12まで
は同群として扱っても再生樹脂の強度、外観は良好とな
る。このグラフは一般的な塩化ビニル系樹脂製品におけ
る傾向を示すもので、成分の配合割合によって多少変動
があるものの概ね類似の結果が得られた。That is, the plasticizer need not be so large until a certain degree of softness is obtained, but once softened, a large amount of plasticizer is required for softening. Therefore, if there are two types of used vinyl chloride resins and the hardness is high, the difference in the mixing ratio of the plasticizer tends to be difficult to melt at least together. On the other hand, if the two kinds of used vinyl chloride resins are soft vinyl chloride resins, even if there is a considerable difference in the content of the plasticizer, there is no great difference in the hardness, so that it is possible to melt them together. The graph of Table 3 shows the hardness and the range of the hardness that can be melted together at that hardness. For example, a vinyl chloride resin product has a hardness of 100 Hs
In the case of (JISA), the strength and appearance of the recycled resin are basically good even when treated as the same group up to a hardness of ± 4 (+4, that is, up to 96 Hs (JISA) because there is no +4). Also,
With a hardness of 70 Hs (JISA), the strength and appearance of the recycled resin are basically good even when treated as the same group up to a hardness of ± 12. This graph shows the tendency in a general vinyl chloride resin product, and almost similar results were obtained although there was some variation depending on the mixing ratio of the components.
【0030】[0030]
【表3】 [Table 3]
【0031】<実施例1>表4に示すように第1群の樹
脂材料片Aとして試料3を使用し第2群の樹脂材料片B
として試料1を用いた。配合割合は各々50%ずつとし
た。第1の混練部41の樹脂材料片を溶融させるための
バンドヒータ18a〜18d、第2の混練部42の樹脂
材料片を溶融させるための35a〜35d、第3の混練
部43の樹脂材料片を溶融させるためのバンドヒータ1
8f〜18jの設定は表5〜表7の通りである。 <実施例2>表4に示すように第1群の樹脂材料片Aと
して試料4を使用し第2群の樹脂材料片Bとして試料1
を用いた。配合割合は各々50%ずつとした。第1の混
練部41の樹脂材料片を溶融させるためのバンドヒータ
18a〜18d、第2の混練部42の樹脂材料片を溶融
させるための35a〜35d、第3の混練部43の樹脂
材料片を溶融させるためのバンドヒータ18f〜18j
の設定は表5〜表7の通りである。<Example 1> As shown in Table 4, a sample 3 was used as a first group of resin material pieces A, and a second group of resin material pieces B was used.
Was used as Sample 1. The mixing ratio was 50% each. Band heaters 18a to 18d for melting the resin material pieces of the first kneading section 41, 35a to 35d for melting the resin material pieces of the second kneading section 42, and the resin material pieces of the third kneading section 43 Band heater 1 for melting
Tables 5 to 7 show the settings of 8f to 18j. <Example 2> As shown in Table 4, sample 4 was used as the first group of resin material pieces A, and sample 1 was used as the second group of resin material pieces B.
Was used. The mixing ratio was 50% each. Band heaters 18a to 18d for melting the resin material pieces of the first kneading section 41, 35a to 35d for melting the resin material pieces of the second kneading section 42, and the resin material pieces of the third kneading section 43 Band heaters 18f to 18j for melting
Are as shown in Tables 5 to 7.
【0032】<実施例3>表4に示すように第1群の樹
脂材料片Aとして試料5を使用し第2群の樹脂材料片B
として試料1を用いた。配合割合は各々50%ずつとし
た。第1の混練部41の樹脂材料片を溶融させるための
バンドヒータ18a〜18d、第2の混練部42の樹脂
材料片を溶融させるための35a〜35d、第3の混練
部43の樹脂材料片を溶融させるためのバンドヒータ1
8f〜18jの設定は表5〜表7の通りである。 <実施例4>表4に示すように第1群の樹脂材料片Aと
して試料5を使用し第2群の樹脂材料片Bとして試料2
を用いた。配合割合は各々50%ずつとした。第1の混
練部41の樹脂材料片を溶融させるためのバンドヒータ
18a〜18d、第2の混練部42の樹脂材料片を溶融
させるための35a〜35d、第3の混練部43の樹脂
材料片を溶融させるためのバンドヒータ18f〜18j
の設定は表5〜表7の通りである。<Example 3> As shown in Table 4, a sample 5 was used as a first group of resin material pieces A, and a second group of resin material pieces B was used.
Was used as Sample 1. The mixing ratio was 50% each. Band heaters 18a to 18d for melting the resin material pieces of the first kneading section 41, 35a to 35d for melting the resin material pieces of the second kneading section 42, and the resin material pieces of the third kneading section 43 Band heater 1 for melting
Tables 5 to 7 show the settings of 8f to 18j. <Example 4> As shown in Table 4, sample 5 was used as the first group of resin material pieces A and sample 2 was used as the second group of resin material pieces B.
Was used. The mixing ratio was 50% each. Band heaters 18a to 18d for melting the resin material pieces of the first kneading section 41, 35a to 35d for melting the resin material pieces of the second kneading section 42, and the resin material pieces of the third kneading section 43 Band heaters 18f to 18j for melting
Are as shown in Tables 5 to 7.
【0033】<実施例5>表4に示すように第1群の樹
脂材料片Aとして試料4を使用し第2群の樹脂材料片B
として試料2を用いた。配合割合は各々50%ずつとし
た。第1の混練部41の樹脂材料片を溶融させるための
バンドヒータ18a〜18d、第2の混練部42の樹脂
材料片を溶融させるための35a〜35d、第3の混練
部43の樹脂材料片を溶融させるためのバンドヒータ1
8f〜18jの設定は表5〜表7の通りである。 <実施例6>表4に示すように第1群の樹脂材料片Aと
して試料4を使用し第2群の樹脂材料片Bとして試料2
を用いた。配合割合は第1群の樹脂材料片Aを25%、
第2群の樹脂材料片Bを75%とした。第1の混練部4
1の樹脂材料片を溶融させるためのバンドヒータ18a
〜18d、第2の混練部42の樹脂材料片を溶融させる
ための35a〜35d、第3の混練部43の樹脂材料片
を溶融させるためのバンドヒータ18f〜18jの設定
は表5〜表7の通りである。 <実施例7>表4に示すように第1群の樹脂材料片Aと
して試料4を使用し第2群の樹脂材料片Bとして試料1
を用いた。配合割合は第1群の樹脂材料片Aを25%、
第2群の樹脂材料片Bを75%とした。第1の混練部4
1の樹脂材料片を溶融させるためのバンドヒータ18a
〜18d、第2の混練部42の樹脂材料片を溶融させる
ための35a〜35d、第3の混練部43の樹脂材料片
を溶融させるためのバンドヒータ18f〜18jの設定
は表5〜表7の通りである。<Example 5> As shown in Table 4, a sample 4 was used as a first group of resin material pieces A, and a second group of resin material pieces B was used.
Was used as Sample 2. The mixing ratio was 50% each. Band heaters 18a to 18d for melting the resin material pieces of the first kneading section 41, 35a to 35d for melting the resin material pieces of the second kneading section 42, and the resin material pieces of the third kneading section 43 Band heater 1 for melting
Tables 5 to 7 show the settings of 8f to 18j. <Example 6> As shown in Table 4, sample 4 was used as the first group of resin material pieces A and sample 2 was used as the second group of resin material pieces B.
Was used. The mixing ratio is 25% for the first group of resin material pieces A,
The resin material piece B of the second group was 75%. First kneading unit 4
Band heater 18a for melting one resin material piece
Tables 18 to 18d, 35a to 35d for melting the resin material pieces of the second kneading section 42, and the band heaters 18f to 18j for melting the resin material pieces of the third kneading section 43 are shown in Tables 5 to 7. It is as follows. <Example 7> As shown in Table 4, sample 4 was used as the first group of resin material pieces A, and sample 1 was used as the second group of resin material pieces B.
Was used. The mixing ratio is 25% for the first group of resin material pieces A,
The resin material piece B of the second group was 75%. First kneading unit 4
Band heater 18a for melting one resin material piece
Tables 18 to 18d, 35a to 35d for melting the resin material pieces of the second kneading section 42, and the band heaters 18f to 18j for melting the resin material pieces of the third kneading section 43 are shown in Tables 5 to 7. It is as follows.
【0034】[0034]
【表4】 [Table 4]
【0035】[0035]
【表5】 [Table 5]
【0036】[0036]
【表6】 [Table 6]
【0037】[0037]
【表7】 [Table 7]
【0038】また、上記実施の形態の別例として次のよ
うに構成することも可能である。 ・上記各実施の形態では押出機11を使用して実施例に
ついて説明したが、その他の射出成型機やカレンダ加工
機に応用することも可能である。また上記押出機11の
ダイ16の代わりに他の成型品を成型するダイを用いて
もよい。 ・上記実施の形態では押出機11は一軸のスクリュ2
0、37を使用したが2軸以上のスクリュでもよい。ス
クリュ数が増すと樹脂送り出し速度が増すため、上記実
施例の設定は変更される。Further, as another example of the above embodiment, the following configuration is also possible. -In each of the above-described embodiments, the example is described using the extruder 11, but the present invention can be applied to other injection molding machines and calendar processing machines. Further, instead of the die 16 of the extruder 11, a die for molding another molded product may be used. In the above embodiment, the extruder 11 is a single screw 2
Although 0 and 37 are used, screws having two or more axes may be used. Since the resin feeding speed increases as the number of screws increases, the setting in the above embodiment is changed.
【0039】・第1群の樹脂材料片Aや第2群の樹脂材
料片Bとしては必ずしも単一の使用済み塩化ビニル系樹
脂でなくともよい。上記のように可塑剤の含有量につい
ては一緒に溶融させても不具合の生じないある程度の幅
が与えられているからである。更に、使用済み塩化ビニ
ル系樹脂にて構成される第1群の樹脂材料片Aや第2群
の樹脂材料片B中に原料レジンや可塑剤を混入すること
も可能である。これによって、可塑剤の配合割合を調整
して所望の再生樹脂製品を得ることが可能となる。 ・上記実施例では使用済み塩化ビニル系樹脂にて構成さ
れる第1群の樹脂材料片Aや第2群の樹脂材料片B中に
少量の可塑剤含有量の大きく異なる使用済み樹脂製品が
含まれても構わない。例えば、使用済み塩化ビニル系樹
脂品の分別作業中に誤って本来混ぜたくない使用済み樹
脂製品が混入されることがないわけではない。この量が
極めてわずかであって再生樹脂製品に強度、外観につい
て無視できる程度のものであれば構わない。 ・上記各ヒータの温度設定は一例であって、上記実施例
に限定はされない。その他、本発明の趣旨を逸脱しない
態様で実施することは自由である。The first group of resin material pieces A and the second group of resin material pieces B need not necessarily be a single used vinyl chloride resin. As described above, the content of the plasticizer is given a certain range that does not cause a problem even if the plasticizers are melted together. Further, it is also possible to mix a raw resin or a plasticizer into the first group of resin material pieces A and the second group of resin material pieces B composed of used vinyl chloride resin. This makes it possible to obtain a desired recycled resin product by adjusting the mixing ratio of the plasticizer. In the above embodiment, the first group of resin material pieces A and the second group of resin material pieces B composed of used vinyl chloride-based resin contain a small amount of used resin products having significantly different plasticizer contents. You can do it. For example, it does not mean that a used resin product that the user does not want to mix is mistakenly mixed during the sorting operation of the used vinyl chloride resin product. It is sufficient if this amount is extremely small and the strength and appearance of the recycled resin product can be ignored. -The temperature setting of each heater is an example, and is not limited to the above embodiment. In addition, the present invention can be freely implemented without departing from the gist of the present invention.
【0040】[0040]
【図1】 本発明の実施の形態の押出機の平面図。FIG. 1 is a plan view of an extruder according to an embodiment of the present invention.
11…押出機、17…第1のシリンダ本体、32…第2
のシリンダ本体、41…第1の混練部、42…第2の混
練部、43…第3の混練部。11 extruder, 17 first cylinder body, 32 second
, A first kneading section, 42 ... a second kneading section, 43 ... a third kneading section.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) B29B 17/00 B29B 7/42 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B29B 17/00 B29B 7/42
Claims (2)
別された塩化ビニル系樹脂を主体とした樹脂材料片を各
群毎に別個の加熱室内で加熱しながら混練装置にて混練
して溶融させるとともに、溶融した各群の溶融材料を合
流させて混練装置にて加熱下で混練してほぼ均質な塩化
ビニル系再生樹脂を製造する塩化ビニル系再生樹脂の製
造方法。1. A resin material piece mainly composed of a vinyl chloride resin which is separated into a plurality of groups which are melted in different temperature zones, and are kneaded by a kneading apparatus while being heated for each group in a separate heating chamber. A method of producing a vinyl chloride-based regenerated resin in which the molten materials of the respective groups are combined and kneaded under heating in a kneading apparatus to produce a substantially homogeneous vinyl chloride-based regenerated resin.
群の樹脂材料片を第1の加熱室内に導入し加熱下で混練
装置にて混練して溶融させるとともに、軟質塩化ビニル
系樹脂を主体とした第2群の樹脂材料片を第2の加熱室
内に導入し加熱下で混練装置にて混練して溶融させ、溶
融した両材料を合流させて両材料を混練装置にて加熱下
で混練してほぼ均質な塩化ビニル系再生樹脂を製造する
塩化ビニル系再生樹脂の製造方法。2. A first resin comprising a hard vinyl chloride resin as a main component.
The group of resin material pieces are introduced into the first heating chamber, kneaded and melted by a kneading device under heating, and the second group of resin material pieces mainly composed of soft vinyl chloride resin are added to the second heating chamber. Into a kneader, and knead and melt the mixture in a kneading machine under heating. The two melted materials are combined, and the two materials are kneaded in a kneading machine under heating to produce a substantially homogeneous vinyl chloride regenerated resin. Method for producing recycled resin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10283314A JP2958642B1 (en) | 1998-09-18 | 1998-09-18 | Method for producing vinyl chloride regenerated resin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10283314A JP2958642B1 (en) | 1998-09-18 | 1998-09-18 | Method for producing vinyl chloride regenerated resin |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2958642B1 true JP2958642B1 (en) | 1999-10-06 |
JP2000094447A JP2000094447A (en) | 2000-04-04 |
Family
ID=17663866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10283314A Expired - Fee Related JP2958642B1 (en) | 1998-09-18 | 1998-09-18 | Method for producing vinyl chloride regenerated resin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2958642B1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990083957A (en) * | 1999-09-02 | 1999-12-06 | 최욱 | The reproduction process of the waste plastics. |
JP4685263B2 (en) * | 2001-04-11 | 2011-05-18 | 株式会社東和コーポレーション | Plastic molding |
JP4309151B2 (en) * | 2003-02-25 | 2009-08-05 | 株式会社イノアックコーポレーション | Injection molding method and injection molding machine |
JP2007070383A (en) * | 2005-09-02 | 2007-03-22 | Kobelco Eco-Solutions Co Ltd | Method of treatment of vinyl chloride-based resin product and vinyl chloride-based resin composition obtained by the method of treatment |
-
1998
- 1998-09-18 JP JP10283314A patent/JP2958642B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2000094447A (en) | 2000-04-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5322866A (en) | Method of producing biodegradable starch-based product from unprocessed raw materials | |
US5362778A (en) | Extrudable polyvinyl alcohol compositions containing modified starches | |
JP6530418B2 (en) | Method of manufacturing plasticized PVC semi-finished product | |
JPH0725944B2 (en) | Polymer-based blend composition containing modified starch | |
CA2595964A1 (en) | Polyvinyl chloride molding composition | |
EP0735304A2 (en) | Extruded CPVC pipe | |
US10059814B2 (en) | Method for producing ready-to-use soft PVC films or profiles | |
US4581406A (en) | Fluoroelastomer containing polyethylene composition and process for extruding same | |
JPH06270223A (en) | Method and equipment for extrusion | |
JP2003055470A (en) | Biodegradable resin composition | |
JP2958642B1 (en) | Method for producing vinyl chloride regenerated resin | |
JP5349720B2 (en) | Multi-layer pellets with rubber core | |
EP0894594A2 (en) | Process for producing granulated material or molded product of vinyl chloride-based resin | |
US5221580A (en) | Granules of coated vinyl acetate/ethylene copolymer, process for producing them and their use as adhesives | |
KR101012173B1 (en) | Polyvinyl halide-uncrosslinked elastomer alloy | |
CN210999920U (en) | Single screw of extrusion reaction plastic extruder | |
US5658980A (en) | Vinyl chloride resin composition | |
US2502371A (en) | Polyvinyl chloride compositions | |
JPH10296820A (en) | Manufacture of water soluble resin molded product | |
JP2002113768A (en) | Method and apparatus for extrusion-molding molding of thermoplastic composite material | |
TW202102585A (en) | Composite plastic alloy manufacturing process method for producing a composite plastic alloy material blended with polyethylene and polyethylene terephthalate for manufacturing various daily necessities | |
JPH08188691A (en) | Vinyl chloride resin composition | |
JP3344761B2 (en) | Method for producing biodegradable resin foam | |
JPH0730211B2 (en) | Method for producing thermoplastic resin composition | |
JPS6227446A (en) | Polyolefin composition |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110730 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110730 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140730 Year of fee payment: 15 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |