JPH0423608Y2 - - Google Patents
Info
- Publication number
- JPH0423608Y2 JPH0423608Y2 JP6527689U JP6527689U JPH0423608Y2 JP H0423608 Y2 JPH0423608 Y2 JP H0423608Y2 JP 6527689 U JP6527689 U JP 6527689U JP 6527689 U JP6527689 U JP 6527689U JP H0423608 Y2 JPH0423608 Y2 JP H0423608Y2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- nonwoven fabric
- composite sheet
- wood
- polyolefin resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000853 adhesive Substances 0.000 claims description 28
- 230000001070 adhesive effect Effects 0.000 claims description 28
- 239000002131 composite material Substances 0.000 claims description 18
- 229920005672 polyolefin resin Polymers 0.000 claims description 18
- 239000004745 nonwoven fabric Substances 0.000 claims description 15
- 238000009415 formwork Methods 0.000 claims description 14
- 229920006026 co-polymeric resin Polymers 0.000 claims description 10
- 229920000098 polyolefin Polymers 0.000 claims description 7
- 239000002023 wood Substances 0.000 description 14
- 239000011120 plywood Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 208000028659 discharge Diseases 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JZLWSRCQCPAUDP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;urea Chemical compound NC(N)=O.NC1=NC(N)=NC(N)=N1 JZLWSRCQCPAUDP-UHFFFAOYSA-N 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Moulds, Cores, Or Mandrels (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案はコンクリート型枠に用いられる木質板
の表面にポリオレフイン系樹脂によるオーバーレ
イを形成し、型枠の脱型性の改善と転用回数の向
上をはかるべくした良質のコンクリート型枠用板
を製造するのに用いられるオーバーレイ用複合シ
ートに関するものである。[Detailed description of the invention] <Industrial application field> This invention forms an overlay of polyolefin resin on the surface of the wooden board used for concrete formwork, improving the demoldability of the formwork and increasing the number of times it can be reused. This invention relates to a composite sheet for overlay used in manufacturing high-quality concrete formwork boards designed to achieve the following.
〈従来の技術〉
コンクリート型枠の表面材料として優れた性能
を有するポリオレフイン系樹脂を型枠用板の表面
にオーバーレイするためのシートは従来から種々
提案されている。これらの従来型シートは木材と
の接着をはかるためポリオレフイン系樹脂の接着
側にコロナ放電加工、火炎処理、プライマー処理
等を施し、カーボン混入後コロナ放電加工、など
の処理を行なつた後に接着剤を用いて木材に貼着
するもの、或いは、接着剤に極性を有する共重合
ポリオレフイン系樹脂層を設けて木材に熱融着せ
しめるもの等がある。<Prior Art> Various sheets have been proposed in the past for overlaying a polyolefin resin, which has excellent performance as a surface material for concrete formwork, on the surface of a formwork board. These conventional sheets are made by applying corona discharge processing, flame treatment, primer treatment, etc. to the adhesive side of the polyolefin resin in order to adhere to wood, and then applying corona discharge treatment after carbon is mixed in, before applying adhesive. There are adhesives that are attached to wood using an adhesive, and adhesives that are heat-sealed to wood by providing a layer of a copolymerized polyolefin resin with polarity on the adhesive.
〈考案が解決しようとする問題点〉
本来ポリオレフイン系樹脂は無極性であるため
ポリオレフイン系以外の材料とは接着しない性質
を有している。そのため、前記の如く、ポリオレ
フイン系樹脂シートを木質基材上にオーバーレイ
するためには、シートの接着側にコロナ放電加工
を施して表面分子の一部に極性を付与し、その上
に接着材としてエポキシ変性アクリル樹脂系接着
剤などの高価な接着剤を用いる必要がある。しか
しながら、それでもなお且つ製品の接着強度の点
で不満足な部分があつた。又、ポリオレフイン系
樹脂シートと木質板との接着強度を確保するため
には、ホツトメルト型接着剤や、接着性ポリオレ
フイン系共重合樹脂を用いて熱融着させる方法も
あるが、この場合には木質板中の水分が蒸発し、
熱プレス解圧時には水蒸気がシートを押し上げて
表面にふくれが生じるなど製造工程上障害の多い
のが現状である。<Problems to be solved by the invention> Since polyolefin resins are originally non-polar, they have the property of not adhering to materials other than polyolefin resins. Therefore, as mentioned above, in order to overlay a polyolefin resin sheet on a wood base material, corona discharge machining is applied to the adhesive side of the sheet to impart polarity to some of the surface molecules, and then the adhesive It is necessary to use expensive adhesives such as epoxy-modified acrylic adhesives. However, there were still some areas where the adhesive strength of the product was unsatisfactory. In addition, in order to ensure the adhesive strength between the polyolefin resin sheet and the wooden board, there is a method of heat-sealing it using a hot melt adhesive or an adhesive polyolefin copolymer resin. The moisture in the board evaporates,
At present, there are many problems in the manufacturing process, such as water vapor pushing up the sheet during hot press decompression, causing blistering on the surface.
更に、前記従来方法はいずれも一旦製品化され
た合板、パーテイクルボードなどの木質板の上に
改めて二次加工としてポリオレフイン系樹脂シー
トをオーバーレイ加工するものであるが、これが
合板など木質板を製造する一次加工の段階でオー
バーレイ加工が可能となれば、製造工程について
大巾なコストダウンが見込まれるのであるが、従
来技術ではこのオーバーレイ加工の工程を、一次
加工のラインに組み入れることは不可能であつ
た。 Furthermore, in all of the above conventional methods, a polyolefin resin sheet is overlayed as a secondary process on a wood board such as plywood or particle board that has already been commercialized, but this is the process by which wood boards such as plywood are manufactured. If it were possible to perform overlay processing at the primary processing stage, it would be expected to significantly reduce costs in the manufacturing process, but with conventional technology, it is impossible to incorporate this overlay processing process into the primary processing line. It was hot.
又、従来方法によつて製造されたオーバーレイ
木質板、特に合板等は天然木をそのまま用いてい
るため、基材表面に割れや虫孔などが存在する。
日本農林規格のコンクリート型枠用合板１種の板
面の品質についても、巾1.5ミリの割れ、長径10
ミリの虫孔などの存在が認められており、この様
な凹部をそのままでオーバーレイすると、その部
分はポリオレフイン系樹脂シートだけのブリツジ
となり、物理的強度が弱くなると云う問題点があ
つた。 Furthermore, since overlay wood boards manufactured by conventional methods, especially plywood, are made of natural wood, cracks, insect holes, etc. are present on the surface of the base material.
Regarding the quality of the board surface of type 1 plywood for concrete formwork according to the Japanese Agricultural Standards, cracks with a width of 1.5 mm and major diameter of 10
The presence of millimeter-sized insect holes has been observed, and if such recesses were to be overlaid as they were, the problem would be that the area would become a bridge made only of polyolefin resin sheets, which would weaken the physical strength.
〈問題点を解決するための手段〉
前記問題点を解決するため、ポリオレフイン系
樹脂フイルムの裏面に不織布を接着性ポリオレフ
イン系共重合樹脂を介して接着すると共に、該不
織布層内に前記接着性ポリオレフイン系共重合樹
脂が含浸しているコンクリート型枠用板のオーバ
ーレイ用複合シートを考案したものである。<Means for Solving the Problems> In order to solve the above problems, a nonwoven fabric is adhered to the back side of a polyolefin resin film via an adhesive polyolefin copolymer resin, and the adhesive polyolefin is bonded within the nonwoven fabric layer. We have devised a composite sheet for overlaying concrete formwork boards that is impregnated with a copolymer resin.
〈作用〉
本考案になる複合シートは、本来分子構造上接
着が困難なポリオレフイン系樹脂フイルムと木質
板とを不織布の繊維によつて連結、接着する作用
をなすものである。また木工業界で広く用いられ
ている熱硬化型接着剤をそのまま使用することが
でき、熱圧着時に発生する水蒸気の殆どは不織布
の繊維に沿つて脱出するため蒸気圧が低くなり、
解圧時のパンクの発生を予防する作用がある。<Function> The composite sheet of the present invention has the function of connecting and bonding a polyolefin resin film, which is originally difficult to bond due to its molecular structure, and a wood board using nonwoven fabric fibers. In addition, thermosetting adhesives widely used in the woodworking industry can be used as is, and most of the water vapor generated during thermocompression bonding escapes along the fibers of the nonwoven fabric, resulting in lower vapor pressure.
It has the effect of preventing punctures during decompression.
〈実施例 １〉
複合シートの製造について第１図によつて説明
する。<Example 1> Manufacturing of a composite sheet will be explained with reference to FIG.
ポリオレフイン系樹脂フイルム１として昭和電
工株式会社製シヨウレツクス2010HF、厚さ40μ
のフイルムを用い、不織布２として旭化成株式会
社製エルタスＮ−5040、厚さ50g／m2のものを用
い、接着性ポリオレフイン系共重合樹脂３として
昭和電工製ERレジンER523Lを用い、Ｔダイ付
押出機４を通して温度240℃、吐出厚さ20μにな
るよう設定し、フイルム１と不織布２とをそれぞ
れ毎分15mの速さで繰出しつつフイルム上に前記
共重合樹脂３を吐出し、不織布２との間にはさみ
込みながら加圧ロール５及び冷却加圧ロール６と
の間で貼合、加圧すると、溶融状態の共重合樹脂
３はフイルム１とは完全に融着し、不織布２の繊
維の隙間に浸透しつつ冷却、固化し、冷却ロール
７によつて完全に冷却され、ポリオレフイン系樹
脂フイルムと不織布とが強固に一体化した複合シ
ート８となつて巻取ロール９に巻取られた。 As the polyolefin resin film 1, Shorex 2010HF manufactured by Showa Denko Co., Ltd., thickness 40μ
The nonwoven fabric 2 was Eltus N-5040 manufactured by Asahi Kasei Corporation, thickness 50 g/m 2 , and the adhesive polyolefin copolymer resin 3 was ER resin ER523L manufactured by Showa Denko, and extruded with a T-die. The copolymer resin 3 is discharged onto the film while feeding the film 1 and the nonwoven fabric 2 at a speed of 15 m/min, respectively, through the machine 4 at a temperature of 240°C and a discharge thickness of 20μ. When the copolymer resin 3 in a molten state is completely fused to the film 1 and bonded and pressurized between the pressure roll 5 and the cooled pressure roll 6 while being sandwiched between them, the copolymer resin 3 in a molten state is completely fused to the film 1, and the gaps between the fibers of the nonwoven fabric 2 are The composite sheet 8 was completely cooled by a cooling roll 7 and wound around a take-up roll 9 to form a composite sheet 8 in which the polyolefin resin film and nonwoven fabric were firmly integrated.
〈実施例 ２〉
不織布２として、三木特種製紙工業株式会社製
「MT−30」、厚さ30g／m2のものを用いた他は、
実施例１と同様にしてコンクリート型枠用板のオ
ーバーレイ用複合シートを得た。<Example 2> As the nonwoven fabric 2, "MT-30" manufactured by Miki Tokushu Paper Industries Co., Ltd. and having a thickness of 30 g/m 2 was used.
A composite sheet for overlaying a concrete form board was obtained in the same manner as in Example 1.
〈実施例 ３〉
ポリオレフイン系樹脂フイルム１として、昭和
電工株式会社製シヨウアロマーFA210、厚さ30μ
のフイルムを用い、不織布２として旭化成工業株
式会社製ベンリーゼ「WP−252」、厚さ25g／m2
のものを用い、押出温度を300℃とした他は実施
例１と同様にして比較的高い温度条件で使用可能
なコンクリート型枠用板のオーバーレイ用複合シ
ートを得た。<Example 3> As the polyolefin resin film 1, Showa Denko K.K.'s Showa Aroma FA210, thickness 30μ
As the nonwoven fabric 2, Bemliese "WP-252" manufactured by Asahi Kasei Industries, Ltd., thickness 25 g/m 2 was used.
A composite sheet for overlaying concrete formwork plates that can be used under relatively high temperature conditions was obtained in the same manner as in Example 1, except that the extrusion temperature was 300°C.
〈考案の効果〉
木質板１０として厚さ12ミリ５プライの市販の
コンクリート型枠用合板を用い、接着剤１１とし
てアイカ工業株式会社製メラミンユリア樹脂接着
剤UM−82に小麦粉20％を混合したものを該合板
上に200g／M2の割合で塗布し、前記実施例１に
よつて得た複合シート８の不織布２側を接着剤１
１に向けて載置し、冷却20分の後、温度105℃、
圧力５Kg／cm2の条件で５分間熱圧した後取り出し
たところ、解圧時の気泡は全く発生せず、複合シ
ートと合板とが強固に接着したコンクリート型枠
用オーバーレイ合板が得られた。<Effect of the invention> As the wood board 10, a commercially available plywood for concrete formwork with a thickness of 12 mm and 5 plies was used, and as the adhesive 11, melamine urea resin adhesive UM-82 manufactured by Aica Kogyo Co., Ltd. was mixed with 20% wheat flour. The nonwoven fabric 2 side of the composite sheet 8 obtained in Example 1 was coated with adhesive 1 on the plywood at a rate of 200 g/M 2 .
1, and after cooling for 20 minutes, the temperature was 105℃,
When the composite sheet was hot-pressed for 5 minutes at a pressure of 5 kg/cm 2 and then taken out, no air bubbles were generated upon decompression, and an overlay plywood for concrete formwork was obtained in which the composite sheet and the plywood were firmly bonded.
また、木質板１０として厚さ2.4ミリの南洋材
ラワンの単板に、接着剤アイカ工業株式会社製メ
ラミンユリア樹脂接着剤UM−82に小麦粉20％を
混合したものを、200g／M2の割合で塗布したの
ち、それぞれの繊維方向が直交するように交互に
５枚重ね、その上に同接着剤１１を同割合で塗布
してから、実施例３によつて得た複合シート８を
重ね、温度120℃、圧力15Kg／cm2の条件で４分間
熱圧して取り出したところ、解圧時に水蒸気によ
る気泡の発生もなく、優れた性能を有するコンク
リート型枠用合板が得られた。 In addition, as the wood board 10, a veneer of lauan, a South Sea wood with a thickness of 2.4 mm, was mixed with melamine urea resin adhesive UM-82 manufactured by Aica Kogyo Co., Ltd. and 20% wheat flour at a ratio of 200 g/M 2 . After coating, five sheets were stacked alternately so that the fiber directions were perpendicular to each other, and then the same adhesive 11 was coated in the same proportion on top of that, and then the composite sheet 8 obtained in Example 3 was stacked. When the plywood was hot-pressed for 4 minutes at a temperature of 120°C and a pressure of 15 kg/cm 2 and taken out, no air bubbles were generated due to water vapor during depressurization, and a plywood for concrete formwork with excellent performance was obtained.
このようにコンクリート型枠用木質板上にポリ
オレフイン系樹脂によるオーバーレイ加工をしよ
うとするとき、本考案に係る複合シートを用いる
ことによつて、高価な接着剤を用いることなく、
一般の木工用接着剤でも充分な接着強度が得られ
る。 When trying to overlay polyolefin resin on wooden boards for concrete formwork in this way, by using the composite sheet of the present invention, it is possible to do so without using expensive adhesives.
Sufficient adhesive strength can be obtained with general woodworking adhesives.
また、熱プレスを用いてオーバーレイを行う際
には発生する水蒸気が、不織布の繊維の周囲に沿
つて脱気される作用があるため、解圧時のふく
れ、パンクなどの心配がなく、作業が容易であ
る。 In addition, when overlaying is performed using a heat press, the water vapor generated is degassed around the fibers of the nonwoven fabric, so there is no need to worry about blistering or punctures when the pressure is released, making the work easier. It's easy.
更に、このオーバーレイ加工の工程を合板等の
木質板の製造工程のラインに組み入れることが可
能であるため、木質板の製造と同時にオーバーレ
イ加工が完了するので、製品の生産コストが大巾
に節減できると云う効果がある。 Furthermore, since this overlay processing process can be incorporated into the production line for wood boards such as plywood, the overlay processing can be completed at the same time as the wood boards are manufactured, resulting in a significant reduction in product production costs. There is an effect called.
第１図は本考案になる複合シートの製造方法の
一例を示す概略図、第２図は本考案複合シートの
拡大断面図、第３図は本考案の複合シートを用い
て製造したコンクリート型枠用板の一実施例の断
面図である。
１……ポリオレフイン系樹脂フイルム、２……
不織布、３……接着性ポリオレフイン系共重合樹
脂、８……複合シート。
Figure 1 is a schematic diagram showing an example of the method for manufacturing the composite sheet of the present invention, Figure 2 is an enlarged sectional view of the composite sheet of the present invention, and Figure 3 is a concrete formwork manufactured using the composite sheet of the present invention. It is a sectional view of one example of a use board. 1...Polyolefin resin film, 2...
Nonwoven fabric, 3... Adhesive polyolefin copolymer resin, 8... Composite sheet.
Claims (1)
を接着性ポリオレフイン系共重合樹脂を介して接
着すると共に、該不織布層内に前記接着性ポリオ
レフイン系共重合樹脂が含浸しているコンクリー
ト型枠用板のオーバーレイ用複合シート。 A composite for overlaying concrete formwork boards, in which a nonwoven fabric is adhered to the back side of a polyolefin resin film via an adhesive polyolefin copolymer resin, and the nonwoven fabric layer is impregnated with the adhesive polyolefin copolymer resin. sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6527689U JPH0423608Y2 (en) | 1989-06-03 | 1989-06-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6527689U JPH0423608Y2 (en) | 1989-06-03 | 1989-06-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH034005U JPH034005U (en) | 1991-01-16 |
| JPH0423608Y2 true JPH0423608Y2 (en) | 1992-06-02 |
Family
ID=31596958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6527689U Expired JPH0423608Y2 (en) | 1989-06-03 | 1989-06-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423608Y2 (en) |
-
1989
- 1989-06-03 JP JP6527689U patent/JPH0423608Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH034005U (en) | 1991-01-16 |
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