JPH06326B2 - Method for producing inorganic extrudate - Google Patents
Method for producing inorganic extrudateInfo
- Publication number
- JPH06326B2 JPH06326B2 JP8411187A JP8411187A JPH06326B2 JP H06326 B2 JPH06326 B2 JP H06326B2 JP 8411187 A JP8411187 A JP 8411187A JP 8411187 A JP8411187 A JP 8411187A JP H06326 B2 JPH06326 B2 JP H06326B2
- Authority
- JP
- Japan
- Prior art keywords
- surface layer
- synthetic resin
- inorganic
- resin particles
- molded body
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 229920003002 synthetic resin Polymers 0.000 claims description 24
- 239000000057 synthetic resin Substances 0.000 claims description 24
- 239000002344 surface layer Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 22
- 239000004568 cement Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 229910010272 inorganic material Inorganic materials 0.000 claims description 10
- 239000011147 inorganic material Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 235000012438 extruded product Nutrition 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 11
- 239000002585 base Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 8
- 230000001788 irregular Effects 0.000 description 7
- 239000011324 bead Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 235000002597 Solanum melongena Nutrition 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は無機質押出成形体の製造方法に関し、更に詳し
くは合成樹脂粒を混入した無機質材料を押出成形し養生
硬化する場合に表面平滑な成形体を得ることのできる新
規な方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a method for producing an inorganic extrusion-molded article, and more specifically, a molding with a smooth surface when extrusion-molding an inorganic material mixed with synthetic resin particles to cure and cure. It relates to a new way in which the body can be obtained.
＜従来技術＞ セメントや石膏等の無機質材料を主成分としつつこれに
発泡スチロール微細粒等の軽量合成樹脂粒を混入して得
た混練物を押出成形し、後オートクレーブ養生して硬化
成形体を得ることが知られている。合成樹脂粒が混入さ
れることにより成形体の軽量化が達成されると共に、オ
ートクレーブ養生時における高熱で該合成樹脂粒が溶融
し成形体内部が多孔質化されるため、断熱性や遮音性が
向上される。また溶融した合成樹脂が成形体内部の独立
気泡の内面に被着含浸されるため、基材との密着性が向
上され強度発現が大となり、防水性が良好となる。<Prior art> A kneaded product obtained by mixing inorganic synthetic materials such as cement and gypsum with light-weight synthetic resin particles such as styrofoam fine particles is extruded and then cured by autoclave to obtain a cured molded article. It is known. The weight reduction of the molded body is achieved by mixing the synthetic resin particles, and the synthetic resin particles are melted by the high heat during autoclave curing and the inside of the molded body is made porous, so that the heat insulating property and the sound insulating property are improved. Be improved. Further, since the molten synthetic resin is adhered and impregnated on the inner surface of the closed cells inside the molded body, the adhesion with the base material is improved, the strength is enhanced, and the waterproof property is improved.
＜発明が解決しようとする問題点＞ このように軽量合成樹脂粒を混入して得られる押出成形
体は概ね満足すべき特性を発揮するものの、尚且つ実施
的には厄介な問題を有するものであった。即ち、一般に
押出成形機から吐出された直後の成形体は成形圧から解
放されて膨張するものであるが、特に発泡体の如き圧縮
変形性の大きな合成樹脂粒が混入されている場合には、
成形中には圧縮され偏平状とされていたものが成形圧か
らの解放の結果復元し、成形体表面を隆起させ不規則な
凹凸面を形成させる。また中実ビーズの如き比較的圧縮
変形しにくい合成樹脂粒が用いられている場合において
も、成形機から吐出直後いわゆるスプリングバック現象
がビーズ周囲において大きく現れ、表面近くに存在する
ビーズが表面を隆起させて同様に不規則な凹凸面を形成
させる。この結果、参考図に示すように成形体Ａの表面
は不規則な凹凸状を呈し、合成樹脂粒Ｂは成形体内部に
散在するものの、その表面近くにおいては極く薄い基材
表層Ｃ１や比較的厚い表層Ｃ２に被覆された状態として
混在している。この状態のままで成形体をオートクレー
ブに投入した場合、合成樹脂粒が高熱によって溶融され
て多孔質化するが、その家庭において、合成樹脂粒の収
縮に伴って極く薄い表層Ｃ１は破壊されてクレーター状
の凹部Ｄを形成し、一方比較的厚い表層Ｃ２はそのまま
硬化されて凸部Ｅを形成して、極めて表面平滑性の劣る
成形体となる。このような成形体を得た後に表面処理す
ることは工程の複雑化・煩雑化をもたらすだけでなく、
不均一な凹凸面を平滑面とするには多量のモルタルを必
要以上の塗厚で塗工しなければならないという欠点を有
していた。また樹脂塗料を塗布する場合には不規則凹凸
面をなくすることは困難であり、意匠性を向上させるこ
とができなかった。<Problems to be Solved by the Invention> Although the extruded product obtained by mixing the lightweight synthetic resin particles in this way exhibits generally satisfactory properties, it still has a problem in practice. there were. That is, generally, the molded body immediately after being discharged from the extruder is released from the molding pressure and expands. However, in particular, when synthetic resin particles having large compressive deformability such as foam are mixed,
What was compressed and made flat during molding is restored as a result of release from molding pressure, and the surface of the molded body is raised to form an irregular surface. In addition, even when synthetic resin particles such as solid beads that are relatively hard to compress and deform are used, a so-called springback phenomenon appears immediately around the beads immediately after discharge from the molding machine, and beads near the surface rise up on the surface. Then, an irregular uneven surface is similarly formed. As a result, as shown in the reference diagram, the surface of the molded body A has irregular irregularities, and the synthetic resin particles B are scattered inside the molded body, but near the surface thereof, a very thin base material surface layer C 1 or It is mixed as a state of being covered by a relatively thick surface layer C 2 . When the molded body is put into the autoclave in this state, the synthetic resin particles are melted by high heat and become porous, but in the household, the extremely thin surface layer C 1 is destroyed due to the shrinkage of the synthetic resin particles. To form a crater-shaped concave portion D, while the relatively thick surface layer C 2 is cured as it is to form a convex portion E, resulting in a molded article having extremely poor surface smoothness. Surface treatment after obtaining such a molded body not only makes the process complicated and complicated, but also
There was a drawback that a large amount of mortar had to be applied with an unnecessarily large coating thickness in order to make the uneven uneven surface smooth. Further, it is difficult to eliminate the irregular asperity surface when the resin coating is applied, and the designability cannot be improved.
＜問題点を解決するための手段＞ 上記問題点を解決するために創案された本発明は、無機
質材料を主成分としこれに合成樹脂粒を混入せしめて調
製した混練物を押出成形するに当たり、押出成形機から
吐出された成形体の表層部に、セメント粉状物又はセメ
ントスラリーを主体とする表層組成物を散布もしくは塗
布し、その後該成形体をオートクレーブ養生して上記無
機質材料を養生硬化せしめると共に上記表層組成物をも
養生硬化せしめ、表面平滑な成形体を形成することを特
徴とする無機質押出成形体の製造方法である。<Means for Solving Problems> The present invention, which was devised to solve the above problems, includes extrusion-molding a kneaded material prepared by mixing an inorganic material as a main component with synthetic resin particles, The surface layer portion of the molded product discharged from the extruder is sprayed or applied with a surface layer composition mainly composed of cement powder or cement slurry, and then the molded product is autoclaved to cure and cure the inorganic material. At the same time, the surface layer composition is also cured and cured to form a molded product having a smooth surface, which is a method for producing an inorganic extruded product.
＜発明の具体的な説明＞ 無機質材料を主成分としこれに合成樹脂粒を混入せしめ
て混練物を調製する。<Detailed Description of the Invention> A kneaded product is prepared by mixing an inorganic material as a main component with synthetic resin particles.
無機質材料はセメント、石膏等の水硬性材料、珪酸カル
シウム水和物を反応生成せしめる珪酸質原料と石灰質原
料等であり、後のオートクレーブ養生によって硬化して
最終製品である押出成形体の基材をなす原料である。Inorganic materials are hydraulic materials such as cement and gypsum, and siliceous and calcareous raw materials that react with calcium silicate hydrate to form the base material of the extruded product that is cured by subsequent autoclave curing. It is a raw material of eggplant.
合成樹脂粒はポリエチレン、ポリスチレン、ポリプロピ
レン、アクリル、ビニル系等の合成樹脂の発泡体、未発
泡体、中実ビーズ等ものを適宜選択して用いることがで
きるが、脱公害的見地からは産業廃棄物である発泡スチ
ロールの微細粉砕粒を用いることが好ましい。As the synthetic resin particles, polyethylene, polystyrene, polypropylene, acrylic, vinyl-based synthetic resin foams, non-foams, solid beads, etc. can be appropriately selected and used, but from the viewpoint of decontamination, industrial waste. It is preferable to use finely crushed styrene foam particles.
混練物には、更に必要に応じて、アスベスト、合成繊
維、炭素繊維、木質繊維、耐アルカリ性ガラス繊維等の
強化繊維材、メチルセルロース等の成形助剤、空気連行
剤等を添加混入することができる。If necessary, the kneaded product may further contain asbestos, synthetic fibers, carbon fibers, wood fibers, reinforcing fiber materials such as alkali-resistant glass fibers, molding aids such as methylcellulose, air entraining agents and the like. .
以上のような原材料に適量の水を加えて得られた混練物
を押出成形機に投入して成形する。押出成形機から吐出
されると、成形圧からの解放の結果合成樹脂粒が成形体
表面を不規則に隆起させるが、本発明ではその不規則表
面上にセメント粉状物又はセメントスラリーを主体とす
る組成物を散布もしくは塗布する。押出成形機からの吐
出直後の成形体は多くの水分を含有しており、単にセメ
ント粉状物を相当量成形体表面に散布するだけでも、そ
の含有水分を吸収してセメントペーストとなり、表面に
層状に付着する。The kneaded product obtained by adding an appropriate amount of water to the above raw materials is put into an extruder and molded. When discharged from the extrusion molding machine, the synthetic resin particles as a result of release from the molding pressure cause the surface of the molded body to rise irregularly, but in the present invention, mainly cement powder or cement slurry is formed on the irregular surface. The composition is sprayed or applied. Immediately after being discharged from the extrusion molding machine, the molded body contains a large amount of water, and even by simply spraying a considerable amount of cement powder on the surface of the molded body, it absorbs the contained water and becomes a cement paste, Adheres in layers.
表層組成物にはウレタン系、アクリル系、エポキシ系等
の適宜樹脂を液状もしくは粉状で添加することができ、
このように樹脂添加して表層とすることにより防水性を
向上させることができる。To the surface layer composition, an appropriate resin such as urethane type, acrylic type and epoxy type can be added in liquid or powder form,
By thus adding the resin to form the surface layer, the waterproof property can be improved.
また表層組成物にはセメントに加えて珪酸質原料を混入
することができ、この場合には後のオートクレーブ養生
によって一部珪酸カルシウム水和物を生成せしめる硬化
体となる。Further, a siliceous raw material can be mixed in the surface layer composition in addition to cement, and in this case, it becomes a hardened body which partially forms calcium silicate hydrate by the subsequent autoclave curing.
更に表層組成物に顔料、染料等を添加混入して着色する
ことによりそのままで装飾板として用いることができ、
或いは表層を白色に着色しておけばその後の着色を任意
且つ容易に行うことができる。Furthermore, it can be used as a decorative plate as it is by adding a pigment, a dye or the like to the surface layer composition and coloring it.
Alternatively, if the surface layer is colored white, the subsequent coloring can be performed arbitrarily and easily.
表層組成物を散布ないし塗布された成形体は、次いで、
オートクレーブ養生により養生硬化される。このとき、
無機質材料が硬化されて成形体基材となると共に、その
表層組成物も同時に硬化されて平滑な表層を形成する。The molded body on which the surface layer composition is sprayed or applied is then
Cured by autoclave curing. At this time,
The inorganic material is cured to form a molded body substrate, and the surface layer composition is simultaneously cured to form a smooth surface layer.
基材の表面は吐出直後成形圧から解放されて不規則・不
均一な凹凸面となるが、該凹凸面は表層に被覆され、平
滑な表面を提供する。The surface of the base material is released from the molding pressure immediately after discharge to form an irregular and uneven uneven surface, and the uneven surface is covered with a surface layer to provide a smooth surface.
オートクレーブ養生を混入した合成樹脂粒の溶融温度以
上で行えば、該合成樹脂粒の溶融痕が成形体内部に独立
気泡として多数散在することとなり、軽量性、断熱性、
遮音性等に優れた多孔質成形体を製造することができ
る。If it is carried out at a temperature not lower than the melting temperature of the synthetic resin particles mixed with autoclave curing, a large number of melting traces of the synthetic resin particles will be scattered inside the molded body as closed cells, resulting in lightness, heat insulation,
It is possible to manufacture a porous molded body having excellent sound insulation and the like.
以上のようにして得られた本発明による押出成形体の一
例を断面図として示すのが第１図である。即ち、成形体
１は、硬化された無機質材料から成る基材２中に合成樹
脂粒の溶融痕である独立気泡孔３が多数散在され、且つ
基材２の表面にはセメントペーストより成る表層４が基
材１の不規則凹凸面を均一に被覆するよう所定厚に被覆
形成されている。FIG. 1 shows a cross-sectional view of an example of the extruded product according to the present invention obtained as described above. That is, in the molded body 1, a large number of closed cell pores 3 which are melting marks of synthetic resin particles are scattered in a base material 2 made of a cured inorganic material, and a surface layer 4 made of cement paste on the surface of the base material 2. Is formed in a predetermined thickness so as to uniformly cover the irregular surface of the base material 1.
＜発明の効果＞ 本発明によれば、合成樹脂粒を無機質材料に混入して得
た混練物を押出成形する場合にも表面平滑な成形体を得
ることができ、その後の表面処理を必要とせずに意匠性
・装飾性に優れた内外装用建材を製造することができ
る。<Effects of the Invention> According to the present invention, a molded product having a smooth surface can be obtained even when a kneaded product obtained by mixing synthetic resin particles into an inorganic material is extrusion-molded, and the subsequent surface treatment is required. It is possible to manufacture interior / exterior building materials that are excellent in design and decorativeness.
第１図は本発明により製造された押出成形体の一例を示
す断面図である。 符号の説明 １…成形体 ２…基材 ３…独立気泡孔 ４…表層FIG. 1 is a cross-sectional view showing an example of an extrusion-molded body produced by the present invention. DESCRIPTION OF SYMBOLS 1 ... Molded body 2 ... Base material 3 ... Closed-cell pores 4 ... Surface layer
Claims (4)
を混入せしめて調製した混練物を押出成形するに当た
り、押出成形機から吐出された成形体の表層部に、セメ
ント粉状物又はセメントスラリーを主体とする表層組成
物を散布もしくは塗布し、その後該成形体をオートクレ
ーブ養生して上記無機質材料を養生硬化せしめると共に
上記表層組成物をも養生硬化せしめ、表面平滑な成形体
を形成することを特徴とする無機質押出成形体の製造方
法。1. When a kneaded product prepared by mixing synthetic resin particles into an inorganic material as a main component and extruding the kneaded product, a cement powder or cement is added to the surface layer of a molded product discharged from an extruder. A surface layer composition mainly composed of a slurry is sprayed or applied, and then the molded body is subjected to autoclave curing to cure and cure the inorganic material, and at the same time, the surface layer composition is also cured to form a molded body having a smooth surface. A method for producing an inorganic extruded body, comprising:
の溶融温度以上の温度条件で行い、該合成樹脂粒を溶融
せしめることを特徴とする、特許請求の範囲第１項に記
載の無機質押出成形体の製造方法。2. The inorganic extrusion molded article according to claim 1, wherein the autoclave curing is carried out under a temperature condition which is equal to or higher than the melting temperature of the synthetic resin particles to melt the synthetic resin particles. Manufacturing method.
ていることを特徴とする、特許請求の範囲第１項に記載
の無機質押出成形体の製造方法。3. The method for producing an inorganic extruded product according to claim 1, wherein a synthetic resin is added and mixed into the surface layer composition.
れていることを特徴とする、特許請求の範囲第１項に記
載の無機質押出成形体の製造方法。4. The method for producing an inorganic extruded product according to claim 1, wherein a siliceous raw material is added and mixed into the surface layer composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8411187A JPH06326B2 (en) | 1987-04-06 | 1987-04-06 | Method for producing inorganic extrudate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8411187A JPH06326B2 (en) | 1987-04-06 | 1987-04-06 | Method for producing inorganic extrudate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63249603A JPS63249603A (en) | 1988-10-17 |
| JPH06326B2 true JPH06326B2 (en) | 1994-01-05 |
Family
ID=13821412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8411187A Expired - Lifetime JPH06326B2 (en) | 1987-04-06 | 1987-04-06 | Method for producing inorganic extrudate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06326B2 (en) |
-
1987
- 1987-04-06 JP JP8411187A patent/JPH06326B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63249603A (en) | 1988-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4031684A (en) | Decorative precast concrete boards and process for producing the same | |
| US3184371A (en) | Foamed silicate structures | |
| US3679539A (en) | Lightweight building units | |
| KR101489477B1 (en) | Artificiality molding product manufaturing method | |
| US4339362A (en) | Hardening composition containing cellulose powder, latex, magnesite and magnesium chloride | |
| US20050182160A1 (en) | Polymer Modified Bricks | |
| CN100370089C (en) | Hard polyurethane foam board composite energy-saving wall and its construction process | |
| TWI784032B (en) | Method for producing cured polymeric skins | |
| JPH06326B2 (en) | Method for producing inorganic extrudate | |
| KR20090075653A (en) | Building exterior cast stone and manufacturing method | |
| CN208056619U (en) | A kind of multi-layer fireproofing thermal insulation board and the heat insulation decoration integrated plate comprising multi-layer fireproofing thermal insulation board and self-heat conserving cast-in-situ template | |
| CN201133042Y (en) | Non-plastering and combined light insulated wall board | |
| JPH0637044B2 (en) | Method for producing inorganic extrudate | |
| CN201133051Y (en) | Wall buttcover plate | |
| JPH0274577A (en) | Light-weight artificial stone | |
| KR940001708B1 (en) | Composite prefab concrete panel and manufacturing method | |
| JP3333027B2 (en) | Manufacturing method of precast panel with tile-like decorative board | |
| JPH07195322A (en) | Manufacture of sandstone-like light aerated concrete precast panel | |
| JPS63100079A (en) | Extrusion formed product and manufacture | |
| JPH0345576A (en) | Production of light-weight cement molding | |
| JPS63100078A (en) | Extrusion formed product and manufacture | |
| JPH0568422B2 (en) | ||
| KR101729936B1 (en) | Method of manufacturing urethane mold for cubic effect and method of manufacturing table using the same | |
| KR200320735Y1 (en) | A fireproof panel make use of waste plastic | |
| KR20200039089A (en) | Method of manufacturing interior board and Interior board having unevenness pattern using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 14 Free format text: PAYMENT UNTIL: 20080105 |