JPH0768550A - Recycling of soft urethane foam - Google Patents
Recycling of soft urethane foamInfo
- Publication number
- JPH0768550A JPH0768550A JP24051893A JP24051893A JPH0768550A JP H0768550 A JPH0768550 A JP H0768550A JP 24051893 A JP24051893 A JP 24051893A JP 24051893 A JP24051893 A JP 24051893A JP H0768550 A JPH0768550 A JP H0768550A
- Authority
- JP
- Japan
- Prior art keywords
- urethane foam
- recycling
- molded product
- soft urethane
- flexible urethane
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軟質ウレタンフォーム
の処理に係り、特に使用済みの軟質ウレタンフォームを
他の成形品として利用できる軟質ウレタンフォームのリ
サイクル方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the treatment of flexible urethane foam, and more particularly to a method of recycling flexible urethane foam which can be used as another molded article.
【０００２】[0002]
【従来の技術】軟質ウレタンフォームは、椅子やクッシ
ョン、その他のパッド等として使用され、使用済みにな
ると廃棄され、土中に埋められたり、焼却されている。
特に焼却処理が行われると、高温を発するために特別な
炉を用意しなければならないばかりか、環境問題を引き
起こすことにもなる。2. Description of the Related Art Flexible urethane foam is used as chairs, cushions, other pads, etc., and when it is used, it is discarded, buried in the soil, or incinerated.
Especially when incineration is performed, not only a special furnace has to be prepared to generate high temperature, but also an environmental problem is caused.
【０００３】そこで、現在、軟質ウレタンフォームのリ
サイクル方法が考えられており、その一例として軟質ウ
レタンフォームを荒く粉砕し、得られたチップを液状の
接着剤で固めたものが知られており、椅子の詰物の補助
材料やカーペットの下敷きとして利用されている。Therefore, at present, a method for recycling soft urethane foam is being considered. As one example, a method is known in which soft urethane foam is roughly crushed and the resulting chips are solidified with a liquid adhesive. It is used as an auxiliary material for padding and as an underlay for carpets.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記のもの
は、チップに接着剤が含浸し接着層が形成されるため、
通常のウレタンと比較して密度が高く、硬さのばらつき
も大きな、耐久性の低いものしか得ることはできない。
さらに、これらのチップは表面積が大きいこと、膨潤度
が高いこと等により多量の接着剤が必要となる。However, in the above-mentioned one, since the chip is impregnated with the adhesive and the adhesive layer is formed,
Only urethane with a higher density, greater variation in hardness, and lower durability than ordinary urethane can be obtained.
Further, since these chips have a large surface area and a high degree of swelling, a large amount of adhesive is required.
【０００５】また、椅子等に使用される軟質ウレタンフ
ォームは、その表面に布等の繊維材が接着されたものが
多く、繊維材の付いたままの軟質ウレタンフォームに、
前記と同様の処理が施され、使用に供されることもあ
る。これは軟質ウレタンフォームだけのものと比較し
て、硬さのばらつきがさらに増大し、耐久性も低いた
め、より低級品として扱われているのが現状である。Many flexible urethane foams used for chairs and the like have a fiber material such as cloth adhered to the surface thereof.
It may be subjected to the same treatment as described above and used. Compared with the soft urethane foam alone, the hardness is further increased and the durability is low, so that it is currently treated as a lower grade product.
【０００６】本発明は、軟質ウレタンフォームをリサイ
クルするに当り、軟質ウレタンフォームだけでなく、軟
質ウレタンフォームに繊維材が付いたものをも、再処理
により品質の安定した耐久性の高い成形品として回収し
得るリサイクル方法を提供することを目的とするもので
ある。In the present invention, when recycling a flexible urethane foam, not only the flexible urethane foam but also the flexible urethane foam with a fiber material is treated as a molded product having stable quality and high durability. It is intended to provide a recycling method that can be collected.
【０００７】[0007]
【課題を解決するための手段】本発明の軟質ウレタンフ
ォームのリサイクル方法は、軟質ウレタンフォームを主
成分とする細粒度の粉砕物と低融点ポリエステル短繊維
を均一に混合し、この混合物を、成形器内にほぼ均等に
充填し、前記成形器内で、低融点ポリエステル短繊維の
軟化温度より高い温度で加熱加圧して成形品を得ること
を特徴としている。The method for recycling a flexible urethane foam of the present invention is to uniformly mix a pulverized product having a fine particle size and a low melting point polyester short fiber, the flexible urethane foam as a main component, and molding the mixture. It is characterized in that it is filled almost evenly in the container and heated and pressed at a temperature higher than the softening temperature of the low melting point polyester short fibers in the molding device to obtain a molded product.
【０００８】[0008]
【作用】低融点ポリエステル短繊維と均一に混合するこ
とが可能となる程度に、軟質ウレタンフォームまたは軟
質ウレタンフォームに繊維材の付いた被処理体を細粒度
の粉砕物に加工する。次に、両方を混合した混合物を、
成形器にほぼ均等に充填し、低融点ポリエステル短繊維
の軟化温度より高い温度で加熱加圧することにより、低
融点ポリエステル短繊維が溶け、低融点ポリエステル短
繊維同志および低融点ポリエステル短繊維と被処理体の
粉砕物が一体となり、均質で品質の安定した耐久性の高
い成形品を得ることができる。The soft urethane foam or the object to be treated with the fiber material attached to the soft urethane foam is processed into a fine-grained pulverized product to the extent that it can be uniformly mixed with the low melting point polyester short fibers. Next, the mixture which mixed both,
By filling the molding machine almost evenly and heating and pressing at a temperature higher than the softening temperature of the low melting point polyester short fibers, the low melting point polyester short fibers melt and the low melting point polyester short fibers and the low melting point polyester short fibers are treated. A crushed product of the body is integrated, and a highly durable molded product with uniform quality and stable quality can be obtained.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面に基づいて説明
すると、１は、椅子の背当てであり、軟質ウレタンフォ
ーム３に布等の繊維材２が貼られたままの被処理体であ
る。４は、投入口５の下方内部にカッター６を有する粉
砕機であり、ダクト７を介してブロア８内に連通されて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a backrest of a chair, which is an object to be treated with a fibrous material 2 such as cloth attached to a flexible urethane foam 3. is there. Reference numeral 4 denotes a crusher having a cutter 6 inside the charging port 5 and is communicated with a blower 8 via a duct 7.
【００１０】このブロア８は、ダクト９を介してサイク
ロン１０に連通され、サイクロン１０下方にはホッパー
１１、さらにはスクリューフィーダ１２に繋がってお
り、その出口付近には、排出される粉砕物１３の量を測
定し、排出量を制御する計量機１４が取付けられてい
る。The blower 8 is connected to a cyclone 10 through a duct 9, and is connected to a hopper 11 below the cyclone 10 and a screw feeder 12, and a crushed material 13 to be discharged is discharged near its outlet. A weighing machine 14 is attached which measures the quantity and controls the quantity discharged.
【００１１】また、１５は、低融点ポリエステル短繊維
であり、バインダーとしての役目をする繊維材である。
１６は、スクリューフィーダ１７の投入口であり、スク
リューフィーダ１７の出口付近には、排出される低融点
ポリエステル短繊維１５の量を測定し、排出量を制御す
る計量機１８が取付けられている。Numeral 15 is a low-melting polyester short fiber, which is a fiber material serving as a binder.
Reference numeral 16 is an input port of the screw feeder 17, and a measuring machine 18 for measuring the amount of the low melting point polyester short fibers 15 discharged and controlling the discharge amount is attached near the outlet of the screw feeder 17.
【００１２】それぞれの計量機１４、１８はダクト１
９、２０を介して、内部に混合羽根２２を有する混練混
合機２１の一端に連通されており、この混練混合機２１
における他端は、ダクト２３を介してスクリューフィー
ダ２４に連通されている。またスクリューフィーダ２４
の出口付近には計量機２５が取付けられており、この計
量機２５は、計量された所定量の混合物２９を型枠２
６、２７から成る成形器２８に供給する機能を有してい
る。Each of the weighing machines 14 and 18 is a duct 1
It is connected to one end of a kneading mixer 21 having a mixing blade 22 inside through 9 and 20.
The other end of is connected to the screw feeder 24 via the duct 23. Also screw feeder 24
A weighing machine 25 is attached near the outlet of the weighing machine 25.
It has a function of supplying a molding machine 28 composed of 6, 27.
【００１３】次に、この実施例に基づく軟質ウレタンフ
ォームのリサイクル方法を説明すると、まず軟質ウレタ
ンフォーム３に布等の繊維材２が貼られたままの被処理
体１が粉砕機４に投入されることにより、この被処理体
１は高回転数のカッター６で細粒度の粉砕物１３に加工
される。Next, the method of recycling the soft urethane foam based on this embodiment will be described. First, the object 1 to be treated with the fibrous material 2 such as cloth stuck to the soft urethane foam 3 is put into the crusher 4. By doing so, the object 1 to be processed is processed into the finely ground pulverized material 13 by the cutter 6 having a high rotation speed.
【００１４】粉砕物１３は、ブロア８によりダクトを介
してサイクロン１０、ホッパー１１、そしてスクリュー
フィーダ１２へと送られ、スクリューフィーダ１２中で
撹拌され、繊維材２の付いた軟質ウレタンフォームの粉
砕物、繊維材２のみ、さらには軟質ウレタンフォームの
みの粉砕物であるほぼ３種類の粉砕物１３が均等に計量
機１４へと送られる。The crushed product 13 is sent to the cyclone 10, the hopper 11, and the screw feeder 12 through the duct by the blower 8 and is agitated in the screw feeder 12, and the crushed product of the soft urethane foam with the fiber material 2 is added thereto. The pulverized product 13 of the fibrous material 2 and the pulverized product of only the soft urethane foam are sent to the weighing machine 14 evenly.
【００１５】これと同時に、スクリューフィーダ１７に
投入された低融点ポリエステル短繊維１５はスクリュー
フィダ１７により計量機１８へと送られる。At the same time, the low melting point polyester short fibers 15 fed into the screw feeder 17 are sent to the weighing machine 18 by the screw feeder 17.
【００１６】計量機１４、１８は、両者の予め定められ
た混合比に基づいて所定量をダクト１９、２０を介して
混練混合機２１に送り出し、ここで、粉砕物１３と低融
点ポリエステル短繊維１５は均一に混練され、ダクト２
３を介してスクリューフィダ２４、計量機２５へと送ら
れる。さらに計量機２５は成形器２８の型枠に応じて調
整された１回分の混合物２９を送り出す。The weighing machines 14 and 18 send out a predetermined amount to the kneading / mixing machine 21 through the ducts 19 and 20 based on a predetermined mixing ratio of the two, where the pulverized material 13 and the low melting point polyester short fibers are used. 15 is uniformly kneaded, and duct 2
Then, it is sent to the screw feeder 24 and the weighing machine 25 via 3. Furthermore, the weighing machine 25 sends out a mixture 29 of one batch adjusted according to the mold of the molding machine 28.
【００１７】成形器２８は、この混合物２９を型枠２
６、２７間に挟み、ホットプレス、すなわち加熱温度１
００℃〜１４０℃を加えるとともに、１〜４００kg／cm
2の範囲で加圧する。この加熱温度は１００℃〜１４０
℃が最適とされ、低融点ポリエステル短繊維１５が軟化
するが、軟質ウレタンフォーム３は流動化しない温度に
なっている。また、加圧力は高いほど密度が増し、強度
が上がる傾向にあるが、密度を高めると、熱伝導率が上
がり、保温力の点で低下するので、最終成形品の用途に
応じた加圧力を選択することになる。The molding machine 28 applies this mixture 29 to the mold 2
It is sandwiched between 6 and 27 and hot pressed, that is, heating temperature 1
1 ~ 400kg / cm with addition of 00 ℃ ~ 140 ℃
Pressurize in the range of 2 . This heating temperature is 100 ° C-140
C is optimum, and the low melting point polyester short fibers 15 are softened, but the soft urethane foam 3 is at a temperature at which it does not fluidize. Also, the higher the pressing force, the higher the density and the higher the strength.However, if the density is increased, the thermal conductivity will increase and the heat retention will decrease. Will be selected.
【００１８】こうしてホットプレス処理された予備成形
品３０は、図２に示されるようにコンベア３１で搬送さ
れ、その工程中に冷却ファン３２によって冷却され、台
座３４上で切断刃３３によって所定の形状に切断加工さ
れ、最終成形品３５が得られる。ここで、成形品３５の
用途に応じて研磨、溝切り等の最終加工を施すこともで
きる。The preformed product 30 thus hot-pressed is conveyed by a conveyor 31 as shown in FIG. 2, cooled by a cooling fan 32 during the process, and cut into a predetermined shape by a cutting blade 33 on a pedestal 34. The final molded product 35 is obtained by cutting. Here, final processing such as polishing and grooving can be performed depending on the intended use of the molded product 35.
【００１９】この成形品３５は、各種製品の部材として
利用でき、例えば断熱材、芯材として、すなわちパーテ
ィションのボード、パーティションの裏張り、またカー
ペットの裏打ち材等に使用することができる。The molded product 35 can be used as a member of various products, and can be used as, for example, a heat insulating material or a core material, that is, a partition board, a partition lining, or a carpet lining material.
【００２０】また、上述のようにリサイクルして一度利
用された成形品を、再度別の粉砕機で粉砕し、混練混合
機２１に混合すると、再度形成品の含有物として再利用
することができる。Further, the molded product which has been recycled and used once as described above is crushed by another crusher again and mixed in the kneading / mixing machine 21 so that it can be reused again as a content of the molded product. .
【００２１】さらにこの成形品は、適当な溶剤を用いて
バインダーである低融点ポリエステル短繊維を溶かし、
粉沫に戻した後、混練混合機２１に混合すると、再度形
成品の含有物として再利用できる。Further, this molded product is prepared by dissolving the low melting point polyester short fibers as a binder using an appropriate solvent,
When the mixture is mixed in the kneading and mixing machine 21 after returning to powder, it can be reused again as the inclusion of the formed product.
【００２２】なお、布等の繊維材２が付いたままの被処
理体１を利用すると、繊維材２がこの成形体３５内に残
留するため強度が向上する傾向も確認されている。It has been confirmed that when the object 1 to be treated with the fiber material 2 such as cloth attached thereto is used, the fiber material 2 remains in the molded body 35, so that the strength is improved.
【００２３】加熱温度を軟質ウレタンフォームの流化温
度以上に上げたとしても所定の性能を有する成形品が得
られるが、流動化温度より低い場合は軟質ウレタンフォ
ームの熱分解が起こらず、シアン化水素の発生が防止で
きる。Even if the heating temperature is raised above the fluidization temperature of the flexible urethane foam, a molded article having a predetermined performance can be obtained. However, when the heating temperature is lower than the fluidization temperature, thermal decomposition of the flexible urethane foam does not occur and hydrogen cyanide Occurrence can be prevented.
【００２４】以上、実施例を図面により説明してきた
が、具体的な構成は実施例に限られるものではなく、本
発明の要旨を逸脱しない範囲における変更や追加があっ
ても本発明に含まれる。Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and modifications and additions within the scope of the present invention are included in the present invention. .
【００２５】[0025]
【発明の効果】本発明は次の効果を奏する。The present invention has the following effects.
【００２６】（ａ）粉砕物と低融点ポリエステル短繊維
と均一に混合した混合物を、低融点ポリエステル短繊維
の軟化温度より高い温度で加熱加圧することにより、均
質で品質の安定した耐久性の高い成形品を得ることがで
きる。（請求項１） （ｂ）成形器内での加熱温度が、低融点ポリエステル短
繊維の軟化温度より高く、軟質ウレタンフォームの流動
化温度より低い条件で成形が可能なため、成形時間の短
縮と省エネルギー化が実現できる。（請求項２） （ｃ）軟質ウレタンフォームの流動化温度より低い加熱
温度で成形が行われるため、軟質ウレタンフォームの熱
分解がおこらず、シアン化水素の発生が防止できる。
（請求項２）(A) A mixture obtained by uniformly mixing the pulverized product and the low-melting point polyester short fibers is heated and pressed at a temperature higher than the softening temperature of the low-melting point polyester short fiber, so that it is homogeneous, stable in quality, and highly durable. A molded product can be obtained. (Claim 1) (b) Since the heating temperature in the molding machine is higher than the softening temperature of the low melting point polyester short fibers and lower than the fluidization temperature of the flexible urethane foam, the molding time can be shortened. Energy saving can be realized. (Claim 2) (c) Since molding is performed at a heating temperature lower than the fluidization temperature of the flexible urethane foam, thermal decomposition of the flexible urethane foam does not occur, and generation of hydrogen cyanide can be prevented.
(Claim 2)
【図１】本発明に利用されるリサイクル装置の一部分を
示す概念図である。FIG. 1 is a conceptual diagram showing a part of a recycling device used in the present invention.
【図２】図１のリサイクル装置の他部分を示す概念図で
ある。FIG. 2 is a conceptual diagram showing another part of the recycling device of FIG.
１ 被処理体 ２ 繊維
材 ３ 軟質ウレタンフォーム ４ 粉砕
機 ５ 投入口 ６ カッ
ター ７ ダクト ８ ブロ
ア ９ ダクト １０ サイ
クロン １１ ホッパー １２ ス
クリューフィーダ １３ 粉砕物 １４ 計
量機 １５ 低融点ポリエステル短繊維 １６ 投
入口 １７ スクリューフィーダ １８ 計
量機 １９ ダクト ２０ ダ
クト ２１ 混練混合機 ２２ 混
合羽根 ２３ ダクト ２４ ス
クリューフィーダ ２５ 計量機 ２６ 型
枠 ２７ 型枠 ２８ 成
形器 ２９ 混合物 ３０ 予
備成形品 ３１ コンベア ３２ 冷
却判ファン ３３ 切断刃 ３４ 台
座 ３５ 成形品1 Object to be treated 2 Fiber material 3 Soft urethane foam 4 Crusher 5 Input port 6 Cutter 7 Duct 8 Blower 9 Duct 10 Cyclone 11 Hopper 12 Screw feeder 13 Crushed material 14 Weighing machine 15 Low melting point polyester short fiber 16 Input port 17 Screw feeder 18 Measuring Machine 19 Duct 20 Duct 21 Kneading Mixer 22 Mixing Blade 23 Duct 24 Screw Feeder 25 Measuring Machine 26 Formwork 27 Formwork 28 Molding Machine 29 Mixture 30 Preforms 31 Conveyor 32 Cooling Fan 33 Cutting Blade 34 Pedestal 35 Forming Goods
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 105:12 105:26 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display area B29K 105: 12 105: 26
Claims (4)
度の粉砕物と低融点ポリエステル短繊維を均一に混合
し、この混合物を、成形器にほぼ均等に充填し、前記成
形器で、低融点ポリエステル短繊維の軟化温度より高い
温度で加熱加圧して成形品を得る軟質ウレタンフォーム
のリサイクル方法。1. A fine-grained pulverized product containing a flexible urethane foam as a main component and a low-melting point polyester short fiber are uniformly mixed, and the mixture is evenly filled into a molding machine, and the molding machine has a low melting point. A method for recycling soft urethane foam, which obtains a molded product by heating and pressing at a temperature higher than the softening temperature of polyester short fibers.
化温度よりは低い温度である請求項１に記載の軟質ウレ
タンフォームのリサイクル方法。2. The method for recycling flexible urethane foam according to claim 1, wherein the heating temperature is lower than the fluidization temperature of the flexible urethane foam.
とにより、リサイクルできるようにした請求項１または
２に記載の軟質ウレタンフォームのリサイクル方法。3. The method for recycling a flexible urethane foam according to claim 1, wherein the molded product is crushed and mixed into the mixture so as to be recycled.
成形品を粉沫に戻した後、前記混合物に混入することに
より、リサイクルできるようにした請求項１または２に
記載の軟質ウレタンフォームのリサイクル方法。4. A binder of a molded product is dissolved with a solvent,
The method for recycling a flexible urethane foam according to claim 1 or 2, wherein the molded product is made into a powder and then mixed into the mixture so that it can be recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24051893A JP2745191B2 (en) | 1993-08-31 | 1993-08-31 | Recycling method of flexible urethane foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24051893A JP2745191B2 (en) | 1993-08-31 | 1993-08-31 | Recycling method of flexible urethane foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0768550A true JPH0768550A (en) | 1995-03-14 |
| JP2745191B2 JP2745191B2 (en) | 1998-04-28 |
Family
ID=17060723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24051893A Expired - Fee Related JP2745191B2 (en) | 1993-08-31 | 1993-08-31 | Recycling method of flexible urethane foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2745191B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015033823A (en) * | 2013-08-09 | 2015-02-19 | 東芝環境ソリューション株式会社 | Waste disposal treatment system and waste disposal treatment method using waste disposal treatment system |
| KR102348295B1 (en) * | 2021-01-06 | 2022-01-11 | 주식회사 디아이티그린 | apparatus for mixing staple fibers and waste urethane powder in sound-absorbing panel manufacturing system using staple fiber and waste urethane powder |
-
1993
- 1993-08-31 JP JP24051893A patent/JP2745191B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015033823A (en) * | 2013-08-09 | 2015-02-19 | 東芝環境ソリューション株式会社 | Waste disposal treatment system and waste disposal treatment method using waste disposal treatment system |
| KR102348295B1 (en) * | 2021-01-06 | 2022-01-11 | 주식회사 디아이티그린 | apparatus for mixing staple fibers and waste urethane powder in sound-absorbing panel manufacturing system using staple fiber and waste urethane powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2745191B2 (en) | 1998-04-28 |
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|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980106 |
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| LAPS | Cancellation because of no payment of annual fees |