JP2932431B2 - Polypropylene composite sheet and blow molding method using the same - Google Patents
Polypropylene composite sheet and blow molding method using the sameInfo
- Publication number
- JP2932431B2 JP2932431B2 JP17786197A JP17786197A JP2932431B2 JP 2932431 B2 JP2932431 B2 JP 2932431B2 JP 17786197 A JP17786197 A JP 17786197A JP 17786197 A JP17786197 A JP 17786197A JP 2932431 B2 JP2932431 B2 JP 2932431B2
- Authority
- JP
- Japan
- Prior art keywords
- composite sheet
- polypropylene
- polyester
- hollow molded
- laminated
- 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
- 239000004743 Polypropylene Substances 0.000 title claims description 75
- 239000002131 composite material Substances 0.000 title claims description 68
- -1 Polypropylene Polymers 0.000 title claims description 21
- 229920001155 polypropylene Polymers 0.000 title claims description 20
- 238000000071 blow moulding Methods 0.000 title claims description 9
- 238000000465 moulding Methods 0.000 claims description 39
- 239000000835 fiber Substances 0.000 claims description 23
- 229920000728 polyester Polymers 0.000 claims description 22
- 229920000742 Cotton Polymers 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 11
- 238000007664 blowing Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリプロピレン複
合シートとこれを用いたブロー成形方法にに関するもの
である。TECHNICAL FIELD The present invention relates to a polypropylene composite sheet and a blow molding method using the same.
【０００２】[0002]
【従来の技術】従来、中空成形品の製造には、ポリエチ
レン化合物等からなるチューブ状の樹脂成形材が用いら
れ、その成形には押出機とプレス成形機を一体型に構成
したブロー成形機が使用されていた。2. Description of the Related Art Conventionally, in the production of a hollow molded article, a tubular resin molding material made of a polyethylene compound or the like has been used. Had been used.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述し
たように従来のブロー成形機は、押出機とプレス成形機
とにより構成されているため、真空成形機やプレス成形
機に比べ大きな設備投資を必要とするばかりでなく、樹
脂成形に限られているため、クロス、フィルム等の表皮
材との一体成形が不可能である等の問題点があった。However, as described above, a conventional blow molding machine is composed of an extruder and a press molding machine, and therefore requires a large capital investment compared to a vacuum molding machine and a press molding machine. In addition, the method is limited to resin molding, so that there is a problem that integral molding with a skin material such as a cloth or a film is impossible.
【０００４】[0004]
【課題を解決するための手段】上記問題点を解消する手
段として、プレス成形機を用いてブロー成形することが
考えられるが、プレス成形機を用いてブロー成形するに
は以下の条件を備えたポリプロピレン複合シート（以
下、ＰＰ複合シートと記す）を必要とする。As means for solving the above problems, blow molding using a press molding machine can be considered, but blow molding using a press molding machine is provided with the following conditions. A polypropylene composite sheet (hereinafter, referred to as a PP composite sheet) is required.
【０００５】１．溶融したＰＰ複合シートを積層した
際、ＰＰ複合シート相互が溶着せず、プレス箇所のみ完
全、且つ、強固に溶着すること。 ２．プレス成形による一次成形品内にエアーを吹き込ん
だ際、ＰＰ複合シートに穴や亀裂が生じないこと。[0005] 1. When the molten PP composite sheets are laminated, the PP composite sheets are not welded to each other, but are completely and firmly welded only at the pressed portion. 2. When air is blown into the primary molded product by press molding, no holes or cracks occur in the PP composite sheet.
【０００６】而して、上記の条件を備えたＰＰ複合シー
トは未だ開発されていない。[0006] Therefore, a PP composite sheet satisfying the above conditions has not yet been developed.
【０００７】例えば、タルク、炭カル等の無機フィラー
を含むＰＰ複合シートが各種上市されているが、該複合
シートは加熱溶融した状態で積層すると、積層したＰＰ
複合シート相互がたちどころに溶着し中空成形品の成形
には適さない。For example, various PP composite sheets containing an inorganic filler such as talc and charcoal are commercially available. When the composite sheets are laminated while being heated and melted, the laminated PP
The composite sheets are quickly welded to each other and are not suitable for forming hollow molded articles.
【０００８】また、木質繊維、ガラス繊維入りのＰＰ複
合シートは、溶融積層してもＰＰ複合シート相互が溶着
することはないが、繊維の材質が固く、しかも、繊維が
太いためにエアーを吹き込んだ際、たちどころに穴や亀
裂が生じ中空成形品の成形には適さない。[0008] Further, PP composite sheets containing wood fibers and glass fibers do not weld to each other even when they are melt-laminated, but air is blown in because the fiber material is hard and the fibers are thick. In such a case, holes and cracks are quickly formed, which is not suitable for forming a hollow molded product.
【０００９】さらに、ポリエステル繊維又はポリエステ
ルと木綿の混紡繊維を用いたＰＰ複合シート（当社：商
品名ハイパピア）が知られているが、このＰＰ複合シー
トはプレス成形機用のシートであり、やはり、ブロー成
形には適さなかった。Furthermore, a PP composite sheet using polyester fibers or a blend fiber of polyester and cotton (our company: Hypapia) is known. This PP composite sheet is a sheet for a press molding machine. It was not suitable for blow molding.
【００１０】[0010]
【課題を解決するための手段】本発明者等は、ポリエス
テル繊維又はポリエステルと木綿の混紡繊維が、木質繊
維やガラス繊維に比べ、繊維径が細く、且つ、短いこと
に着目し、種々実験研究を重ねた結果、ポリプロピレン
に対し、ポリエステル繊維又はポリエステルと木綿の混
紡繊維を２：１〜９：１の割合で含有させてＰＰ複合シ
ートを構成することにより、該ＰＰ複合シートを溶融積
層した際、ＰＰ複合シート相互は溶着せずプレス箇所の
み完全、且つ、強固に溶着し、しかも、ブロー成形時に
ＰＰ複合シートに穴や亀裂の生じることのないＰＰ複合
シートを開発し、このＰＰ複合シートを加熱溶融した
後、プレス成形機にセットした金型上に積層してプレス
成形機により一次成形すると共に、ＰＰ複合シート間に
一定時間空気を充填、通気させて中空成形品を成形する
方法を発明するに至ったものである。The inventors of the present invention have focused on the fact that polyester fibers or blended fibers of polyester and cotton have smaller and shorter fiber diameters than wood fibers and glass fibers. When the PP composite sheet is melt-laminated by forming the PP composite sheet by mixing polyester fiber or a blend fiber of polyester and cotton at a ratio of 2: 1 to 9: 1 with respect to polypropylene, The PP composite sheet is not welded to each other, and only the pressed portion is completely and firmly welded. Further, a PP composite sheet which does not cause holes or cracks in the PP composite sheet during blow molding has been developed. After being heated and melted, it is laminated on a mold set in a press molding machine, primary molded by the press molding machine, and filled with air for a certain time between PP composite sheets. And it has reached to invent a method of molding a hollow molded article by aeration.
【００１１】[0011]
【発明の実施の形態】以下、本発明のポリプロピレン複
合シートとこれを用いた中空成形品の成形方法について
説明する。図１乃至図４は本発明の成形方法を示す要部
切截断面図である。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a polypropylene composite sheet of the present invention and a method for molding a hollow molded article using the same will be described. 1 to 4 are cutaway sectional views of a main part showing a molding method of the present invention.
【００１２】本発明に係るポリプロピレン複合シート
は、ポリプロピレンに対し、ポリエステル繊維又はポリ
エステルと木綿の混紡繊維を２：１〜９：１の割合で溶
融複合化して構成されている。The polypropylene composite sheet according to the present invention is formed by melt-compounding polypropylene fibers with polyester fibers or a blend fiber of polyester and cotton at a ratio of 2: 1 to 9: 1.
【００１３】上述したポリプロピレン複合シート（以
下、前記と同様にＰＰ複合シートと記す）を用いて中空
成形品を成形するには、ＰＰ複合シートを加熱炉におい
て加熱溶融した後、該ＰＰ複合シートをプレス成形機に
セットした金型に積層してプレス成形機により一次成形
すると共に、ＰＰ複合シート間に一定時間空気を充填、
通気させて中空成形品を成形する。In order to form a hollow molded article using the above-described polypropylene composite sheet (hereinafter, referred to as a PP composite sheet as described above), the PP composite sheet is heated and melted in a heating furnace, and then the PP composite sheet is melted. While laminating on a mold set in a press molding machine and performing primary molding with the press molding machine, air is filled between PP composite sheets for a certain time,
The hollow molded article is formed by aeration.
【００１４】以下、具体的実施例を挙げて本発明を詳細
に説明する。Hereinafter, the present invention will be described in detail with reference to specific examples.
【００１５】[0015]
実施例１ ＭＦＲ５のポリプロピレン８５部に対し、ポリエステル
と木綿の混紡繊維を２：１〜９：１の割合で溶融複合化
し、押出機により厚さ５ｍｍのＰＰ複合シートを構成し
た。Example 1 A blend fiber of polyester and cotton was melt-combined in a ratio of 2: 1 to 9: 1 with 85 parts of MFR5 polypropylene, and a 5 mm-thick PP composite sheet was formed by an extruder.
【００１６】上記、ＰＰ複合シートを加熱炉内において
加熱溶融した後、図１に示すようにプレス成形機２にセ
ットされた上型３ａと下型３ｂとからなる金型３の下型
３ｂ上に２枚のＰＰ複合シート１ａ、１ｂを積層し、次
いで、ＰＰ複合シート１ａ、１ｂの両端部間にエアーノ
ズル４、４’を差し込むと共に、一方のノズル４’を閉
じた状態とし、プレス成形機２により一次成形を行い、
次いで、他方のエアーノズル４から一次成形品内に３Ｋ
ｇｆ／ｃｍ2 のエアーを約１５秒間吹き込んで二次成形
を行った後、前記エアーノズル４’を解放して３０秒間
中空成形品内にエアーを通気させて冷却し、中空成形品
を成形した。After the PP composite sheet has been heated and melted in a heating furnace, as shown in FIG. 1, the upper and lower dies 3a and 3b are set on a press molding machine 2 on a lower die 3b. , Two PP composite sheets 1a and 1b are laminated, and then air nozzles 4 and 4 'are inserted between both ends of the PP composite sheets 1a and 1b, and one nozzle 4' is closed, and press molding is performed. Performs primary molding by machine 2,
Next, 3K is injected into the primary molded product from the other air nozzle 4.
After secondary molding was performed by blowing air of gf / cm 2 for about 15 seconds, the air nozzle 4 ′ was released, and air was ventilated into the hollow molded product for 30 seconds to cool it, thereby forming a hollow molded product. .
【００１７】その結果、全ての成形品においてプレス成
形面が完全、且つ、強固に溶着し、しかも、中空部に穴
や亀裂は全くなく、強度的に優れた中空成形品が得られ
た。As a result, a hollow molded product excellent in strength was obtained, in which the press-formed surfaces of all the molded products were completely and firmly welded, and had no holes or cracks in the hollow portion.
【００１８】特に、ＭＦＲ５のポリプロピレン８５部に
対し、ポリエステルと木綿の混紡繊維を６：１の割合で
溶融複合化して、押出機により厚さ５ｍｍに形成したＰ
Ｐ複合シートは、曲げ弾性率１．８×１０4 Ｋｇｆ／ｃ
ｍ2 、アイゾットインパクト２４Ｋｇｆｃｍ／ｃｍと耐
衝撃性に優れ、このＰＰ複合シートを用いた中空成形品
は、構造上の剛性とＰＰ複合シートの耐衝撃性とがあい
まって強度的に非常に優れたものであった。In particular, a blend of polyester and cotton is melt-compounded at a ratio of 6: 1 to 85 parts of MFR5 polypropylene, and P is formed to a thickness of 5 mm by an extruder.
The P composite sheet has a flexural modulus of 1.8 × 10 4 Kgf / c.
m 2 , Izod impact of 24 Kgfcm / cm, which is excellent in impact resistance. A hollow molded article using this PP composite sheet is extremely excellent in strength due to the combination of structural rigidity and impact resistance of the PP composite sheet. Was something.
【００１９】実施例２ ＭＦＲ５のポリプロピレン８５部に対し、ポリエステル
繊維を２：１〜９：１の割合で溶融複合化し、押出機に
より厚さ５ｍｍのＰＰ複合シートを構成した。Example 2 Polyester fibers were melt-composited at a ratio of 2: 1 to 9: 1 with 85 parts of MFR5 polypropylene, and a 5 mm-thick PP composite sheet was formed by an extruder.
【００２０】上記、ＰＰ複合シートを加熱炉内で加熱溶
融した後、前記と同様の方法により中空成形品を成形し
た。After the above PP composite sheet was heated and melted in a heating furnace, a hollow molded article was formed in the same manner as described above.
【００２１】その結果、前述したと同様に、プレス成形
面が完全、且つ、強固に溶着し、しかも、穴や亀裂は全
くなく、強度的に優れた中空成形品が得られた。As a result, as described above, a hollow molded article excellent in strength was obtained in which the press-formed surface was completely and firmly welded, and had no holes or cracks.
【００２２】以上の実施例に対し、ＭＦＲ５のポリプロ
ピレン８５部に対し、ポリエステル繊維又はポリエステ
ルと木綿の混紡繊維を２：１以上の割合で溶融複合化し
たＰＰ複合シートは、成形性が悪く中空成形には適さな
かった。In contrast to the above examples, a PP composite sheet obtained by melt-compounding polyester fiber or a blended fiber of polyester and cotton at a ratio of 2: 1 or more to 85 parts of polypropylene of MFR5 has poor moldability and is hollow molded. Not suitable for
【００２３】また、ＭＦＲ５のポリプロピレン８５部に
対し、ポリエステル繊維又はポリエステルと木綿の混紡
繊維を９：１以下の割合で溶融複合化したＰＰ複合シー
トにあっては、加熱溶融して積層した際、ＰＰ複合シー
ト相互が溶着し中空成形品を成形することができなかっ
た。In the case of a PP composite sheet in which polyester fiber or a blend fiber of polyester and cotton is melt-composited at a ratio of 9: 1 or less with respect to 85 parts of MFR5 polypropylene, when heat-melted and laminated, The PP composite sheets were welded to each other and a hollow molded article could not be formed.
【００２４】実施例３ 前述した実施例１と同様にして厚さ５ｍｍのＰＰ複合シ
ートを構成し、該ＰＰ複合シートを加熱炉内において加
熱溶融した後、図２に示すように、プレス成形機２にセ
ットされた下型３ｂ上に３枚のＰＰ複合シート１ａ、１
ｂ、１ｃを積層し、ＰＰ複合シート１ａ，１ｂの一端部
間にエアーノズル４ａを差し込むと共に、ＰＰ複合シー
ト１ｂ、１ｃの両端部間にエアーノズル４ｂ、４ｂ’を
差し込んで、一方のエアーノズル４ｂ’を閉じた状態と
してプレス成形機２により一次成形を行い、次いで、Ｐ
Ｐ複合シート１ａ、１ｂ間に１Ｋｇｆ／ｃｍ2 のエアー
を約１〜２秒間吹き込んでエアーノズル４ａを閉じた状
態とした後、ＰＰ複合シート１ｂ、１ｃ間に３Ｋｇｆ／
ｃｍ2 のエアーを５秒間吹き込み、然る後、エアーノズ
ル４ｂ’を解放状態にして６０秒間エアーを通気させて
冷却し中空成形品を成形した。Example 3 A 5 mm-thick PP composite sheet was formed in the same manner as in the above-mentioned Example 1, and the PP composite sheet was heated and melted in a heating furnace. Then, as shown in FIG. The three PP composite sheets 1a, 1 on the lower mold 3b set to 2
b and 1c are stacked, and an air nozzle 4a is inserted between one end of the PP composite sheets 1a and 1b, and air nozzles 4b and 4b 'are inserted between both ends of the PP composite sheets 1b and 1c. 4b 'is closed, primary molding is performed by the press molding machine 2, and then P
After blowing 1 kgf / cm 2 of air between the P composite sheets 1a and 1b for about 1 to 2 seconds to close the air nozzle 4a, 3 kgf / cm 2 is applied between the PP composite sheets 1b and 1c.
Air of 2 cm 2 was blown in for 5 seconds, and then the air nozzle 4b 'was opened to allow air to flow for 60 seconds to cool and form a hollow molded article.
【００２５】その結果、従来の中空成形機では不可能で
あった２つの中空部を有する中空成形品が極めて容易に
得られ、しかも、３層のプレス成形面は全て完全、且
つ、強固に溶着し、中空部の穴や亀裂は全くみられなか
った。As a result, a hollow molded product having two hollow portions, which was impossible with a conventional hollow molding machine, can be obtained very easily, and all the three-layer press-formed surfaces are completely and strongly welded. However, no holes or cracks were found in the hollow part.
【００２６】実施例４ ＭＦＲ１０のポリプロピレン７０部に対し、ポリエステ
ルと木綿の混紡繊維を６：１の割合で溶融複合化し、押
出機により厚さ１．５ｍｍのＰＰ複合シートを構成し、
次いで、積層すべき一方のＰＰ複合シートの上面に不織
布をラミネートした。Example 4 70 parts of MFR10 polypropylene was melt-composited with a blended fiber of polyester and cotton at a ratio of 6: 1, and a 1.5 mm-thick PP composite sheet was formed by an extruder.
Next, a nonwoven fabric was laminated on the upper surface of one PP composite sheet to be laminated.
【００２７】上記、ＰＰ複合シートと上面に不織布をラ
ミネートしたＰＰ複合シートを共に加熱炉内で加熱溶融
した後、図３に示すように、プレス成形機２にセットさ
れた下型３ｂ上に不織布１ｄをラミネートしたＰＰ複合
シート１ａを上層としてＰＰ複合シート１ａ、１ｂを積
層し、積層したＰＰ複合シート１ａ、１ｂの両端部間に
エアーノズル４、４’を差し込むと共に、一方のエアー
ノズル４’を閉じた状態としてプレス成形機により一次
成形を行い、次いで、一次成形品内に３Ｋｇｆ／ｃｍ2
のエアーを５秒間吹き込んだ後、エアーノズル４’を開
放し２５秒間エアーを通気させて冷却し中空成形品を成
形した。After the above-mentioned PP composite sheet and the PP composite sheet having the nonwoven fabric laminated on the upper surface are both heated and melted in a heating furnace, the nonwoven fabric is placed on the lower mold 3b set in the press molding machine 2 as shown in FIG. The PP composite sheets 1a and 1b are laminated with the PP composite sheet 1a laminated with 1d as an upper layer, and the air nozzles 4 and 4 'are inserted between both ends of the laminated PP composite sheets 1a and 1b, and one air nozzle 4' Is closed, primary molding is performed by a press molding machine, and then 3 kgf / cm 2 is contained in the primary molded product.
After blowing air for 5 seconds, the air nozzle 4 'was opened and air was passed for 25 seconds to cool and form a hollow molded article.
【００２８】その結果、従来は同時加工が不可能であっ
た表皮材をラミネートした中空成形品の成形が極めて容
易に行えた。As a result, it was possible to extremely easily form a hollow molded product laminated with a skin material which could not be simultaneously processed in the past.
【００２９】実施例５ ＭＦＲ１０のポリプロピレン７０部に対し、ポリエステ
ルと木綿の混紡繊維及びタルク１５部を６：１の割合で
溶融複合化し、押出機により厚さ１．５ｍｍのＰＰ複合
シートを構成した。Example 5 A blend of polyester and cotton and 15 parts of talc were melt-combined with 70 parts of MFR10 polypropylene at a ratio of 6: 1, and a 1.5 mm-thick PP composite sheet was formed by an extruder. .
【００３０】上述のようにして構成されたＰＰ複合シー
トは、曲げ弾性率が３．６×１０4Ｋｇｆ／ｃｍ2 と剛
性に優れ、このＰＰ複合シートを用いて前述した方法に
より中空成形品を成形することにより、構造状の剛性と
ＰＰ複合シートの剛性とがあいまって、より一層剛性に
優れた中空成形品が得られ、ガラス繊維で強化したエポ
キシ樹脂成形品の代替としても使用し得るという結果が
得られた。The PP composite sheet constituted as described above has a flexural modulus of 3.6 × 10 4 Kgf / cm 2 and is excellent in rigidity, and a hollow molded article can be formed by using the PP composite sheet by the method described above. By molding, the rigidity of the structure and the rigidity of the PP composite sheet are combined, so that a hollow molded article with even higher rigidity can be obtained, and it can be used as an alternative to an epoxy resin molded article reinforced with glass fiber. The result was obtained.
【００３１】ＭＦＲ１０のポリプロピレン７５部に対
し、ポリエステルと木綿の混紡繊維を４：１の割合で溶
融複合化し、押出機により厚さ１．５ｍｍのＰＰ複合シ
ートを構成した。A mixed fiber of polyester and cotton was melt-compounded at a ratio of 4: 1 to 75 parts of polypropylene of MFR10, and a 1.5 mm-thick PP composite sheet was formed by an extruder.
【００３２】上記、ＰＰ複合シートを加熱炉内で加熱溶
融した後、図４に示すように、プレス成形機２にセット
された下型３ｂ上にＰＰ複合シート１ａ、１ｂを積層
し、前述したと同様の方法で中空成形品を成形した後、
プレス溶着面をカットして、成形品を成形した。After heating and melting the above-mentioned PP composite sheet in a heating furnace, as shown in FIG. 4, the PP composite sheets 1a and 1b are laminated on a lower mold 3b set in a press molding machine 2, and the above-described steps are performed. After molding a hollow molded article in the same manner as
The press-welded surface was cut to form a molded product.
【００３３】上述のように、中空成形品を成形した後、
その溶着面をカットして成形品を成形することにより、
ワンショットで同一形状又は形状の異なる成形品を複数
成形し得るものである。As described above, after forming the hollow molded article,
By cutting the welding surface to form a molded product,
A plurality of molded products having the same shape or different shapes can be formed in one shot.
【００３４】なお以上は、本発明のＰＰ複合シートと、
これを用いた成形方法について図示説明したが、本発明
に係るＰＰ複合シートは単体においてプレス成形や真空
成形にも適用し得ることは勿論である。The above is a description of the PP composite sheet of the present invention,
Although the forming method using this is illustrated and described, it is a matter of course that the PP composite sheet according to the present invention can be applied to press forming or vacuum forming as a single body.
【００３５】[0035]
【発明の効果】本発明によれば上述のように、ＰＰ複合
シートを溶融積層しても溶着することはなく、しかも、
プレス面においては完全、且つ、強固に溶着し、エアー
の吹き込みにより穴や亀裂が生じることはない。このこ
とから、プレス成形機による中空成形方法が可能であ
り、従って、設備費を大幅に削減できるばかりでなく、
２空室等を有する中空成形品は勿論のこと、不織布等を
外周面にラミネートした中空成形品の製造や、中空成形
品を成形した後、その溶着周面をカットすることにより
複数の成形品を同時に成形し得る等の優れた利点があ
る。According to the present invention, as described above, even if the PP composite sheets are melt-laminated, they do not adhere to each other.
It is completely and firmly welded on the press surface, and no holes or cracks are generated by blowing air. From this, a hollow molding method using a press molding machine is possible, and therefore, not only can the equipment cost be significantly reduced,
(2) A hollow molded product having a non-woven fabric or the like laminated on the outer peripheral surface, or a hollow molded product formed by laminating a hollow molded product, and then a plurality of molded products are cut by cutting the welded peripheral surface. Have excellent advantages such as that they can be molded simultaneously.
【図１】本発明の成形方法を示す要部欠截断面図。FIG. 1 is a fragmentary cross-sectional view showing a molding method of the present invention.
【図２】本発明の成形方法を示す要部欠截断面図。FIG. 2 is a fragmentary cross-sectional view showing a molding method according to the present invention.
【図３】本発明の成形方法を示す要部欠截断面図。FIG. 3 is a fragmentary cross-sectional view showing a molding method of the present invention.
【図４】本発明の成形方法を示す要部欠截断面図。FIG. 4 is a fragmentary sectional view showing a molding method according to the present invention.
１ａ、１ｂ、１ｃ ＰＰ複合シート ２ プレス成形機 ３ 金型 ４、４’ エアーノズル 1a, 1b, 1c PP composite sheet 2 Press molding machine 3 Mold 4, 4 'Air nozzle
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ //(Ｃ０８Ｌ 23/12 67:00） Ｂ２９Ｋ 23:00 105:12 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI // (C08L 23/12 67:00) B29K 23:00 105: 12
Claims (2)
維又はポリエステルと木綿の混紡繊維が２：１〜９：１
の割合で含有されていることを特徴とするポリプロピレ
ン複合シート。1. A polypropylene fiber comprising a polyester fiber or a blend of polyester and cotton in a ratio of 2: 1 to 9: 1.
A polypropylene composite sheet, characterized in that it is contained in a ratio of:
維又はポリエステルと木綿の混紡繊維を２：１〜９：１
の割合で含有したポリプロピレン複合シートを加熱溶融
した後、該複合シートをプレス成形機にセットした金型
に積層してプレス成形機により一次成形すると共に、複
合シート間に一定時間空気を充填、通気させて中空成形
品を成形することを特徴とするブロー成形方法。2. Polypropylene and polyester fiber or a mixed fiber of polyester and cotton in a ratio of 2: 1 to 9: 1.
After heating and melting the polypropylene composite sheet containing the composite sheet, the composite sheet is laminated on a mold set in a press molding machine, and is primarily molded by the press molding machine. A blow molding method characterized by forming a hollow molded article by performing the blow molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17786197A JP2932431B2 (en) | 1997-06-19 | 1997-06-19 | Polypropylene composite sheet and blow molding method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17786197A JP2932431B2 (en) | 1997-06-19 | 1997-06-19 | Polypropylene composite sheet and blow molding method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1110717A JPH1110717A (en) | 1999-01-19 |
| JP2932431B2 true JP2932431B2 (en) | 1999-08-09 |
Family
ID=16038368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17786197A Expired - Fee Related JP2932431B2 (en) | 1997-06-19 | 1997-06-19 | Polypropylene composite sheet and blow molding method using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2932431B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006224681A (en) * | 2006-04-24 | 2006-08-31 | Aitec:Kk | Multilayer panel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6607664B2 (en) * | 2014-06-23 | 2019-11-20 | 日産自動車株式会社 | Panel material for car luggage compartment |
| DE112016007233T5 (en) | 2016-09-16 | 2019-07-04 | Kasai Kogyo Co., Ltd. | Method for producing a web material and method for mixing a mixed starting material |
-
1997
- 1997-06-19 JP JP17786197A patent/JP2932431B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006224681A (en) * | 2006-04-24 | 2006-08-31 | Aitec:Kk | Multilayer panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1110717A (en) | 1999-01-19 |
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