JPH02160853A - Polyolefin sheet for decorative panel - Google Patents
Polyolefin sheet for decorative panelInfo
- Publication number
- JPH02160853A JPH02160853A JP29812389A JP29812389A JPH02160853A JP H02160853 A JPH02160853 A JP H02160853A JP 29812389 A JP29812389 A JP 29812389A JP 29812389 A JP29812389 A JP 29812389A JP H02160853 A JPH02160853 A JP H02160853A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- weight
- ethylene
- whitening
- propylene
- 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
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 7
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000005977 Ethylene Substances 0.000 claims abstract description 23
- 239000004698 Polyethylene Substances 0.000 claims abstract description 13
- -1 polyethylene Polymers 0.000 claims abstract description 8
- 229920000573 polyethylene Polymers 0.000 claims abstract description 5
- 229920001384 propylene homopolymer Polymers 0.000 claims abstract description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 11
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 8
- 229920005604 random copolymer Polymers 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000002087 whitening effect Effects 0.000 abstract description 20
- 239000000155 melt Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 4
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 abstract 2
- 239000004743 Polypropylene Substances 0.000 description 24
- 238000003466 welding Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000203 mixture Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 8
- 230000000704 physical effect Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000002537 cosmetic Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 239000011342 resin composition Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- USVVENVKYJZFMW-ONEGZZNKSA-N (e)-carboxyiminocarbamic acid Chemical compound OC(=O)\N=N\C(O)=O USVVENVKYJZFMW-ONEGZZNKSA-N 0.000 description 1
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、常温に於ける罫線加工後の折曲げ時のヒンジ
部に発生する白化現象（以下、罫線白化と略記する）が
極めて少なく、しかも溶接性の良好な化粧板用ポリオレ
フィン系シートに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cosmetic material with very little whitening phenomenon (hereinafter abbreviated as "rule whitening") that occurs at the hinge part when folded after crease processing at room temperature, and which has good weldability. This invention relates to a polyolefin sheet for plates.
ポリプロピレン（プロピレンのホモポリマー及び少量の
エチレンとの共重合体など）のシートはヒンジ特性が良
好であるので、ファイルケースなどのハードケースやレ
ターファイルなど化粧性を必要とする文具類や弱電機製
品の包装用品に使用されるようになってきた。Polypropylene sheets (propylene homopolymers, copolymers with a small amount of ethylene, etc.) have good hinge properties, so they can be used for stationery and light electrical products that require cosmetics, such as hard cases such as file cases and letter files. It has come to be used for packaging supplies.
これらの用途に使用する場合の性能とじては、
（１）一定レベル以上の剛性と耐衝撃性をもっこと、
（２）ヒンジ特性を持ち、罫線白化等により美粧性を損
わないこと。When used in these applications, the following properties are: (1) It must have rigidity and impact resistance above a certain level, (2) It must have hinge characteristics and do not impair its cosmetic appearance due to whitening of lines, etc.
（３）超音波又は熱風などによる溶接性の良好なこと などが要求される。(3) Good weldability using ultrasonic waves or hot air. etc. are required.
しかるにプロピレンホモポリマー（以下、ホモＰＰと略
称する）は耐衝撃性（特に低温時）が悪く、また、プロ
ピレン／エチレンランダムコポリマー（以下、ランダム
ＰＰと略称する）は剛性が低いため、いずれも上記用途
には不適当であった。さらにプロピレン／エチレンブロ
ックコポリマー（以下ブロックＰＰ略称する）は剛性と
耐衝撃性のバランスは良好であるが罫線が白化しやすい
点で商品価値が著しく低下する。However, propylene homopolymer (hereinafter abbreviated as homo-PP) has poor impact resistance (especially at low temperatures), and propylene/ethylene random copolymer (hereinafter abbreviated as random PP) has low rigidity, so both of the above It was unsuitable for this purpose. Furthermore, propylene/ethylene block copolymers (hereinafter abbreviated as block PP) have a good balance between rigidity and impact resistance, but the ruled lines tend to whiten, which significantly reduces commercial value.
罫線白化を防止するために、通常１００〜１６０℃に加
熱した刃を用いて罫線加工を行う方法（以下、熱罫線加
工という）が採用されてきた。しかしながら、この熱罫
線加工では鋼製の罫線刃と基盤のベニア板との間に熱膨
張率の差があるため、罫線刃と打抜刃（トムソン刃）と
を−緒に組込むと温度の上昇と下降を繰り返す間に隙間
を生じ、また温度の高い罫線刃で加工されたポリプロピ
レンシートは冷却時に収縮を起こす。従って罫線加工工
程と打抜き加工工程とは別個に行うことが必要であ１、
その結果として二工程の位置合わせに手間を要し、しか
も位置ずれなどのため寸法精度が低下するという問題が
あった。In order to prevent whitening of ruled lines, a method of performing ruled line processing using a blade heated to 100 to 160° C. (hereinafter referred to as "thermal creasing") has been adopted. However, in this thermal creasing process, there is a difference in thermal expansion coefficient between the steel creasing blade and the plywood board, so if the creasing blade and punching blade (Thomson blade) are assembled together, the temperature will rise. A gap is created during the repeated downward movement, and polypropylene sheets processed with a high-temperature creasing blade shrink when cooled. Therefore, it is necessary to perform the ruled line processing process and the punching process separately.
As a result, there was a problem in that alignment in two steps required time and effort, and dimensional accuracy decreased due to positional deviation.
一方、常温での罫線加工は一般に半円形断面の刃先を有
する０、２〜３．０ｍ／ｍ厚さの鋼製の罫線刃と市販の
トムソン刃とを一枚のベニア扱の基盤に同時に組み込ん
だ組刃型を使用し、これをシートに押出することによ１
、打抜きと罫押しのずれがなく、極めて精度の高い罫線
加工品が得られる。On the other hand, for crease processing at room temperature, a steel crease blade with a semicircular cross-section edge with a thickness of 0.2 to 3.0 m/m and a commercially available Thomson blade are generally assembled into a single veneer base at the same time. 1 by extruding it into a sheet using a double blade mold.
, there is no deviation between punching and creasing, and extremely accurate ruled products can be obtained.
常温罫線加工を行なうシートは剛性、耐衝撃性の点で市
場の要求を満たし、かつ罫線白化を生じない材質のもの
が望まれているが、このようなポリプロピレンシートは
従来見出されていない。It is desired that a sheet subjected to room-temperature creasing be made of a material that satisfies market requirements in terms of rigidity and impact resistance, and that does not cause whitening of the creasing, but such a polypropylene sheet has so far not been found.
また、上記用途の商品は罫線折曲げ加工後、シートを重
ね合わせて超音波溶接または熱風溶接などの溶接によっ
て接合する事が必要とされる。しかも、接合は均一にか
つ接合後の外観を損わないように行われる事が要求され
るが、超音波あるいは熱風溶接の場合に溶接温度が高す
ぎると、ホーン、アンビルなど熱治具の接触による跡が
外観上問題とされるような光沢（以下、テリという）と
なった１、あるいは凹部を生じたりするため、極力低温
で溶接可能とすることが望ましい。In addition, for products for the above-mentioned purposes, it is necessary to overlap the sheets and join them by welding such as ultrasonic welding or hot air welding after the ruled line bending process. Moreover, the welding must be done uniformly and without damaging the appearance after joining, but if the welding temperature is too high in the case of ultrasonic or hot air welding, contact with heat jigs such as horns and anvils may occur. It is desirable to be able to weld at as low a temperature as possible because the marks caused by the welding may become glossy (hereinafter referred to as "terry"), which is a problem in terms of appearance, or may cause recesses.
本発明の目的はシート形状からの常温罫線加工による罫
線白化が極めて少な（、低温溶接性が良好でかつ剛性や
耐衝撃性などの機械的特性がすぐれている、化粧箱とし
てのハードケースやレターファイル等の製作に用いられ
る化粧板用ポリオレフィンシートを提供することにある
。The object of the present invention is to produce a hard case for a decorative case or a letter case, which has extremely low whitening of ruled lines due to the processing of ruled lines at room temperature from a sheet shape. An object of the present invention is to provide a polyolefin sheet for decorative laminates used for manufacturing files and the like.
本発明に従って（Ａ）エチレン含有率が１０重量％以下
であるプロピレン／エチレンランダムコポリマー３０〜
８０重量％と、（Ｂ）密度が０、９４ｇ／ｃｃ以上であ
るポリエチレン１０〜５０重量％と、（Ｃ）プロピレン
ホモポリマー０〜４０重量％とよりなる樹脂組成物をシ
ート状に押出成形してなる化粧板用ポリオレフィンシー
トが提供される。According to the present invention (A) Propylene/ethylene random copolymer 30-30 having an ethylene content of 10% by weight or less
(B) 10 to 50 weight % of polyethylene having a density of 0.94 g/cc or more, and (C) 0 to 40 weight % of propylene homopolymer is extruded into a sheet shape. A polyolefin sheet for decorative laminates is provided.
本発明において、Ａ成分のプロピレン／エチレンランダ
ムコポリマー（以下ランダムＰＰと略称する）は単量体
（エチレン及びプロピレン）の混合物からの共重合体で
あ１、プロピレンの予備重合と単量体混合物の共重合に
よって得られたもの及び単量体混合物の供給比を変えて
多段重合を行って得られたものも含む。In the present invention, the propylene/ethylene random copolymer (hereinafter abbreviated as random PP) as component A is a copolymer made from a mixture of monomers (ethylene and propylene). It also includes those obtained by copolymerization and those obtained by performing multistage polymerization by changing the supply ratio of the monomer mixture.
エチレン含有量が１０重量％以下、好ましくは２〜５重
量％のランダムＰＰが使用される。エチレン含有量が１
０重量％よりも多い場合には、剛性が著しく低下し、レ
ターファイルやハードケース用として不適当である。Random PP with an ethylene content of less than 10% by weight, preferably from 2 to 5% by weight, is used. Ethylene content is 1
When the amount is more than 0% by weight, the rigidity is significantly reduced, making it unsuitable for use in letter files and hard cases.
ランダムＰＰの製造においては、物性バランスを向上さ
せるために多段重合法が採用されている。重合段階にお
いてエチレン／プロピレン単量体比が３７１〜１／３の
時、ゴム状物質（以下ゴム質と略称する）が生成される
。ランダムＰＰ中にこのゴム質が含まれると、剛性と耐
衝撃性とののバランスが良好になる。In the production of random PP, a multistage polymerization method is employed to improve the balance of physical properties. In the polymerization stage, when the ethylene/propylene monomer ratio is 371 to 1/3, a rubbery substance (hereinafter abbreviated as rubber) is produced. When this rubbery substance is included in the random PP, the balance between rigidity and impact resistance becomes better.
しかし、このゴム質の含有量が多（なると罫線白化が目
立つ傾向が見られる為、樹脂組成物に対する該ゴム質の
含有率が５重量％以下とする事が望ましい。However, if the content of this rubbery substance is large (because whitening of ruled lines tends to be noticeable), it is desirable that the content of this rubbery substance in the resin composition is 5% by weight or less.
本発明に使用する特に好ましい物性のランダムＰＰはプ
ロピレン単量体を予備重合し、エチレン混合比が１０重
量％以下のプロピレン／エチレン混合ガスを更に重合さ
せることによって得られる。Random PP having particularly preferable physical properties used in the present invention can be obtained by prepolymerizing propylene monomer and further polymerizing a propylene/ethylene mixed gas having an ethylene mixing ratio of 10% by weight or less.
また、Ｂ成分のポリエチレン（以下、ＰＥと略称する）
はエチレンホモポリマーの他にエチレンを主成分とする
プロピレン、ブテンなとのα−オレフィンとの共重合体
（α−オレフィンとの共重合の結果、全メチル基ｉ！１
１度がＯ−＆！Ｏ個／１０００カーボンのもの）を含む
ものである。また、密度は０．９４ｇ／ｃｃ以上のもの
を使用する。In addition, polyethylene (hereinafter abbreviated as PE) as component B
In addition to ethylene homopolymer, it is a copolymer of ethylene with α-olefin such as propylene and butene as the main component (as a result of copolymerization with α-olefin, all methyl groups i!1
1 degree is O-&! 0 pieces/1000 carbons). Further, the density of the material used is 0.94 g/cc or more.
密度が０．９４未満のものでは剛性が低く、目的とする
シートを得ることができない。If the density is less than 0.94, the rigidity is low and the desired sheet cannot be obtained.
さらに、Ａ成分のランダムＰＰ及びＣ成分のホモＰＰの
メルトインデックス（以下、ＭＩと略記する）は特に限
定されないが、０．３〜１０ｇ／１０ｍ１ｎであること
が好ましい、ＭＩが０．３ ｇ７１０ｍｉｎ未満の場合
には、他の樹脂との混線性が悪く、押出加工性が低下す
る。一方、１０ｇ／１０ｍ１ｎをこえると押出時のタレ
が太き（、シーテイング性が悪くなるばかシートの耐衝
撃性が低下し、製品とした場合に割れが生じやすい。ま
たＢ成分のＰＥのＭＩは同じ理由で０．２〜５ｇ／１０
ｍ１ｎであることが好ましい。Further, the melt index (hereinafter abbreviated as MI) of the random PP of the A component and the homo PP of the C component is not particularly limited, but is preferably 0.3 to 10 g/10 m1n, and the MI is less than 0.3 g710 min. In this case, crosstalk with other resins is poor, resulting in poor extrusion processability. On the other hand, if it exceeds 10g/10m1n, the sagging during extrusion will be thick (and the sheeting property will be poor), and the impact resistance of the sheet will be reduced, and cracks will easily occur when it is made into a product.Also, the MI of PE of component B is 0.2-5g/10 for the same reason
Preferably, it is m1n.
上記３種の樹脂の配合比はＡ成分のランダムＰＰが３０
〜８０重量％、好ましくは４０〜７５重量％；Ｂ成分の
ＰＥが１０〜５０重量％、好ましくは１５〜４０重量％
；Ｃ成分のホモＰＰが０〜４０重量％、好ましくば０〜
３５重量％の範囲である。The blending ratio of the above three resins is that the random PP of component A is 30
-80% by weight, preferably 40-75% by weight; PE of component B is 10-50% by weight, preferably 15-40% by weight
; HomoPP as component C is 0 to 40% by weight, preferably 0 to 40% by weight;
It is in the range of 35% by weight.
Ａ成分のランダムＰＰの配合比が３０％未満では白化防
止効果が不充分であ１、一方８ｏＭｓ％をこえると剛性
不足となる。Ｂ成分の配合比が１０％未満では耐衝撃性
が不足し、一方５０％をこえると溶接した場合の溶接強
度が弱くなりやすい他、ヒンジ耐折強度が低下する。If the blending ratio of random PP as component A is less than 30%, the anti-whitening effect will be insufficient (1), while if it exceeds 80Ms%, the rigidity will be insufficient. If the blending ratio of component B is less than 10%, the impact resistance will be insufficient, while if it exceeds 50%, the welding strength will tend to be weakened and the bending strength of the hinge will decrease.
Ｃ成分のホモＰＰの配合量が４０％を超えると耐衝撃性
が低下し、さらに超音波溶接や熱風溶接のための市販の
溶接機を用いた場合の一般的条件下での溶接強度が弱く
なる傾向がある。If the blending amount of C-component homo-PP exceeds 40%, the impact resistance will decrease, and furthermore, the welding strength will be weak under normal conditions when using a commercially available welding machine for ultrasonic welding or hot air welding. There is a tendency to
上記の樹脂組成物に更に顔料、各種安定剤、帯電防止剤
などを常法に従って添加することができる。Pigments, various stabilizers, antistatic agents, etc. can be further added to the above resin composition according to conventional methods.
また熱分解型の発泡剤（たとえばアゾジカルボン酸アミ
ド、ジニトロソペンタメチレンテトラミン及びアゾビス
イソブチロニトリルなど）及び発泡助剤（たとえば尿素
、酸化亜鉛、ステアリン酸亜鉛など）を添加して発泡シ
ートとすることも可能である。In addition, pyrolytic foaming agents (e.g., azodicarboxylic acid amide, dinitrosopentamethylenetetramine, azobisisobutyronitrile, etc.) and blowing aids (e.g., urea, zinc oxide, zinc stearate, etc.) are added to form foam sheets. It is also possible to do this.
組成物は通常押出機により加熱混練し、Ｔダイ、サーキ
ュラ−ダイなどのダイスより押出した後、ロール冷却又
は空冷によりシート形状とすることができ、その際に押
出ロールにより表面エンボス加工を施してもよい。シー
ト形状とするために使用する機械及び方法は通常のもの
でよく、特に制限されない。The composition is usually heated and kneaded using an extruder, extruded through a die such as a T-die or a circular die, and then formed into a sheet by cooling with rolls or air. Good too. The machine and method used to form the sheet shape may be conventional machines and are not particularly limited.
罫線加工方法は前記のようなトムソン刃と罫線刃を一枚
のベニヤ板に組み込んだ型を用い、通常の機械プレス（
ダイブレス、ビクトリアなど）あるいは油圧プレス等で
シートに罫線刃の長さ当り０、１〜２ ｔｏｎ／ｃｍ、
好ましくは０．５〜１ ｔｏｎ／ｃｍの力で押出する事
により行えばよい。The crease processing method uses a mold that incorporates the Thomson blade and the crease blade into a single plywood board, as described above, and uses a regular mechanical press (
0, 1 to 2 ton/cm per length of the creasing blade on the sheet using a hydraulic press, etc.) or a hydraulic press, etc.
Preferably, extrusion may be performed with a force of 0.5 to 1 ton/cm.
本発明によるシートは罫線白化が極めて少ない。従って
白化現象をきらう化粧箱としてのハードケースやレター
ファイルなどが、常温での打抜き加工及び罫線加工を同
時に行なうことにより容易にしかも寸法安定性の良い状
態で得られる。The sheet according to the present invention has extremely little whitening of ruled lines. Therefore, hard cases, letter files, etc., which are used as decorative cases and which do not suffer from the whitening phenomenon, can be easily obtained in a state with good dimensional stability by simultaneously carrying out the punching process and the ruled line process at room temperature.
化粧板用のシートの接合は通常超音波溶接や熱風溶接の
一般的な市販溶接機で行えることが要求される。超音波
溶接は、重ね合わせたシートをホーンとアンビルにより
押出し、超音波を発振させ、シート間の接合面を局部振
動による発熱で軟化、融解させて接合する方法である。The joining of sheets for decorative laminates is normally required to be performed using a general commercially available welding machine such as ultrasonic welding or hot air welding. Ultrasonic welding is a method of extruding stacked sheets using a horn and an anvil, oscillating ultrasonic waves, and softening and melting the joint surfaces between the sheets by heat generated by local vibrations, thereby joining them.
白化防止を目標として検討を進めた際に得られたシート
の中には低温溶融性が悪かった１、熱伝導率が大きすぎ
たりする為、通常の加熱条件では、製品の表面側にテリ
や凹が生じる為、外観を損うものが含まれていたが、本
発明によるシートの場合はかかる問題点も排除されてお
１、市販の超音波溶接機で、溶接による損傷なしに充分
な溶接強度が得られる。Some of the sheets obtained when conducting studies with the goal of preventing whitening had poor low-temperature melting properties1, and thermal conductivity was too high, so under normal heating conditions, the surface of the product would have terri and However, in the case of the sheet according to the present invention, this problem has been eliminated, and sufficient welding can be performed with a commercially available ultrasonic welding machine without damage due to welding. Provides strength.
また、熱風溶接は、２５０℃〜５００℃の熱風の風量の
調整を行ないつつ熱風吹出部へシートの被接着部を通過
させて軟化融解させた後、押出、接着させる方法である
。本発明によるシートはこの方法においても損傷なしに
充分な溶接強度が容易に得られるものであった。Hot air welding is a method in which the flow rate of hot air at 250° C. to 500° C. is adjusted, and the bonded portion of the sheet is passed through a hot air blowing section to soften and melt, and then extruded and bonded. The sheet according to the present invention could easily be welded to sufficient strength without being damaged by this method.
なお実施例において物性値の測定法は以下の方法に従っ
ている。In the Examples, physical property values were measured according to the following method.
ＰＰランダム共重合体中のエチレン含有量ニブレス成形
フィルムについて赤外吸収スペクトルの７２０，７２６
，７３０ｃｍ−’の各吸光度を測定し、常法により算出
する。Ethylene content in PP random copolymer: 720,726 in the infrared absorption spectrum for nibbles molded film
, 730 cm-' and calculated using a conventional method.
メチル基濃度ニ
ブレス成形フィルムについて赤外吸収スペクトルのメチ
ル量の変角振動による１ ３７８ｃｍ−’の吸収と、こ
れに重なるメチレン基の１３６９１３５３ｃｍ−’の吸
収を測定し、常法により算出する。Methyl group concentration The absorption at 1378 cm-' due to the bending vibration of the amount of methyl in the infrared absorption spectrum of the nibbles molded film and the overlapping absorption at 13691353 cm-' of the methylene group are measured and calculated by a conventional method.
密度：
成形シートについてＪＩＳ Ｋ−６７５８に準じて測定
する。Density: Measure the molded sheet according to JIS K-6758.
Ｍ 工 ： ＡＳＴＭ Ｄ−１２３８−６２Ｔに準じて測定する。M Engineering: Measured according to ASTM D-1238-62T.
岡１１・を生 ：
曲げ弾性率によって判断した。曲げ弾性率は、６ ｍ／
ｍ厚さのプレス成形シートについてＪＩＳ Ｋ−７２０
３に準じて測定する。Oka 11.0: Judged by flexural modulus. The bending modulus is 6 m/
JIS K-720 for m-thick press-formed sheets
Measure according to 3.
デュポン衝撃強さ：
０、８ｍ／ｍ厚さのシートについて東洋精機株式会社製
デュポン衝撃試験機を用いて測定する。先端の曲率半径
が１／２インチの撃芯を用い、２３℃での不破壊−破壊
エネルギー値で表わした。DuPont impact strength: Measured using a DuPont impact tester manufactured by Toyo Seiki Co., Ltd. on a sheet with a thickness of 0.8 m/m. A striking core with a radius of curvature of 1/2 inch at the tip was used, and the values were expressed as non-destructive-destructive energy values at 23°C.
罫線白化； 罫線白化の判定は目視により行なった。Whitening of lines; Judgment of ruled line whitening was performed visually.
０白化なし ○白化僅少
△白化目立つ Ｘ白化が著しい
以下に実施例及び比較例をもって本発明を具体的に説明
する。0 No whitening ○ Slight whitening △ Noticeable whitening X Significant whitening The present invention will be specifically explained below with reference to Examples and Comparative Examples.
実施例Ｉ
ＭＩが１．５ ｇ ／ ＬＯｍｉｎであるホモｐｐの３
０重量部と、ＭＩが１．５ ｇ ／ １０ｍ１ｎでエチ
レン含有率が４％であるランダムＰＰ（プロピレンを予
備重合し、エチレン混合比が６重量％のエチレン−プロ
ピレン混合ガスを更に重合して製造したランダムＰＰ）
の４０重量部と、密度が０．９６ｇ／ｃｃでＭＩがＯ−
３ｇ ／ １０ｍ１ｎであるＰＥ３０重量部とよりなる
樹脂組成物に対し、黒色顔料を０．６重量部添加し、ヘ
ンシェルミキサーにて充分撹拌した混合物を口径が４０
ｍｍφでＬ／Ｄが２２である押出機にて、シリンダー最
高温度２２０℃で加熱混練し、リップ長が１５０ｍｍで
あるＴダイより押出し、引取ロールにて冷却しながら成
形し、厚さ０．８ｍｍ、幅１２０ｍｍのシートサンプル
を作製した。Example I Homopp 3 with MI of 1.5 g/LOmin
0 parts by weight, random PP with an MI of 1.5 g/10 m1n and an ethylene content of 4% (manufactured by prepolymerizing propylene and further polymerizing an ethylene-propylene mixed gas with an ethylene mixing ratio of 6% by weight) Random PP)
with a density of 0.96 g/cc and an MI of O-
0.6 parts by weight of black pigment was added to a resin composition consisting of 30 parts by weight of PE with a diameter of 3g/10ml, and the mixture was thoroughly stirred using a Henschel mixer.
Using an extruder with mmφ and L/D of 22, the mixture was heated and kneaded at a maximum cylinder temperature of 220°C, extruded through a T-die with a lip length of 150 mm, and molded while cooling with a take-up roll to a thickness of 0.8 mm. A sheet sample with a width of 120 mm was prepared.
このシートの物性値は表１に示す通りであ１、化粧箱及
びレターファイル等に使用する為の市場要求値の目安で
ある曲げ弾性率８０００ ｋｇ／ｃｍ２及びデュポン衝
撃強さ１５〜２０ ｋｇ ａｍの数値を充分クリヤーす
るものであった。The physical properties of this sheet are as shown in Table 1.1 The sheet has a flexural modulus of 8000 kg/cm2 and a DuPont impact strength of 15 to 20 kg am, which are the standard values required by the market for use in cosmetic cases, letter files, etc. This value was sufficiently cleared.
厚さ０．８ｍｍで先端形状がほぼ半円形断面をもった市
販の罫線刃を常温で使用し、油圧式ダイブレスによりこ
のシートの罫線加工を行った。なお加工後のヒンジ厚さ
が０．２ｍｍとなるように調整した。罫線に沿って折曲
げたところ、白化は殆んど起らず良好であった。罫線部
の反復折曲げによる耐折試験では５ケのテストピースに
対する１万回の折曲げでも切断及び割れの発生は皆無で
あった。A commercially available creasing blade having a thickness of 0.8 mm and a tip having a substantially semicircular cross section was used at room temperature to crease the sheet using a hydraulic die press. The thickness of the hinge after processing was adjusted to 0.2 mm. When folded along the ruled lines, almost no whitening occurred and the result was good. In a folding durability test by repeatedly bending the ruled line portion, no breakage or cracking occurred even after 10,000 bends on 5 test pieces.
シートを重ね合せ、超音波溶接機を用いて溶接テストを
行った。アンビルは先端形状が１．５ｍｍφ×１０点の
ものを使用した。振幅５０μ、押出力５ ｋｇ／ｃｍ２
、発振時間０．３秒で２点当りの接合部剥離強さは４ｋ
ｇであ１、実用上充分な強さがあ１、しかも溶接部のホ
ーン（平滑面）側のテリも少な（、外観上商品価値を損
なうこともなかった。The sheets were stacked and a welding test was performed using an ultrasonic welder. The anvil used had a tip shape of 1.5 mmφ x 10 points. Amplitude 50μ, extrusion force 5 kg/cm2
, the peel strength of the joint at 2 points is 4k with an oscillation time of 0.3 seconds.
g, it has a strength of 1, which is sufficient for practical use, and the horn (smooth surface) side of the welded part has little warp (and does not impair commercial value in terms of appearance).
比較例１
樹脂組成ＭＩが１．５ ｇ ／ ｌｏｍｉｎでエチレン
含有率が８％であるプロピレン／エチレンブロックコポ
リマーの７５重量部と密度が０．９６ｇ／ｃｃでＭＩが
０、３ ｇ ／ １０ｍ１ｎであるＰＨの２５重量部と
した他は実施例１と同様であった。得られたシートにつ
いて同様の評価を行ったところ曲げ弾性率は１２、００
０ｋｇ／ｃｍ２でデュポン衝撃強さは４０〜４５ｋｇ・
ｃｍであ１、良好な物性バランスを示した。しかしこの
シートは常温に於ける罫線加工を行ったところ、折曲げ
時に、罫線白化が（つきつと表われ、見苦しい外観とな
った。Comparative Example 1 Resin composition: 75 parts by weight of a propylene/ethylene block copolymer with an MI of 1.5 g/lomin and an ethylene content of 8% and a density of 0.96 g/cc and an MI of 0.3 g/10 m1n The procedure was the same as in Example 1 except that the pH was 25 parts by weight. A similar evaluation was performed on the obtained sheet, and the bending elastic modulus was 12.00.
At 0 kg/cm2, the DuPont impact strength is 40 to 45 kg.
1 in cm, indicating a good balance of physical properties. However, when this sheet was subjected to crease processing at room temperature, whitening of the creases suddenly appeared during bending, resulting in an unsightly appearance.
実施例２〜８及び比較例２〜８
ホモＰＰ１ランダムＰＰ及びＰＨの成分及び組成比を表
１及び表２に示すように変える他は実施例１と同様にし
てサンプル試作及び評価を行った。なお、各々の成分の
概略の品質を表３に示した。Examples 2 to 8 and Comparative Examples 2 to 8 Samples were prepared and evaluated in the same manner as in Example 1, except that the components and composition ratios of homo PP1 random PP and PH were changed as shown in Tables 1 and 2. Note that the rough quality of each component is shown in Table 3.
各々の成分の組成比を本発明の範囲内で変えた実施例２
〜６は各々剛性、衝撃強さ等の物性が実用上問題のない
バランスのとれたものとなる。これに対し、ホモＰＰ単
独である比較例２では衝撃強さと溶接に問題があ１、ラ
ンダムＰＰ単独である比較例３では剛性が低い他、衝撃
強さの点でも、不充分である。又、両者の半々ブレンド
である比較例４では比較例２より物性バランスが改善さ
れているが衝撃強さが不足である。Example 2 in which the composition ratio of each component was changed within the scope of the present invention
- 6 have well-balanced physical properties such as rigidity and impact strength that pose no practical problems. On the other hand, Comparative Example 2, which is made of homo PP alone, has problems with impact strength and welding, and Comparative Example 3, which is made of random PP alone, has low rigidity and is also insufficient in terms of impact strength. Comparative Example 4, which is a 50/50 blend of the two, has an improved physical property balance than Comparative Example 2, but is insufficient in impact strength.
一方、ランダムＰＰとＰＥの４０対６０重量％ブレンド
である比較例５はＰＥ量が多い為衝撃強さは極めて良好
であるが耐折強さが弱くなりやすくなると共に溶接性で
も不良となる。ホモＰＰ５０部とランダムＰＰｌ０部及
びＰＥ４０部を使用した比較例６では溶接性の点で劣り
白化が目立った〇
ランダムＰＰにエチレン含有率８％のものを使用した実
施例７では実施例１と比較して若干剛性の低下が見られ
たが実用上問題はない。しかし、エチレン含有率が１０
％をこえるランダムＰＰを使用する場合（比較例７）は
、剛性が大幅に低下した。また密度が０．９５ｇ／ｃｃ
のＰＥを使用した実施例８では実用上差支えのない範囲
であるが実施例１と比較して剛性の低下が見られた。一
方密度が０．９３ｇ／ｃｃのものを使用する場合（比較
例８）は、剛性が大幅に低下し、不適当であった。On the other hand, in Comparative Example 5, which is a 40:60% by weight blend of random PP and PE, the impact strength is extremely good due to the large amount of PE, but the bending strength tends to be weak and the weldability is also poor. Comparative Example 6 using 50 parts of homo-PP, 10 parts of random PP, and 40 parts of PE had poor weldability and whitening was noticeable. Example 7 using random PP with an ethylene content of 8% was compared with Example 1. Although a slight decrease in rigidity was observed, there is no problem in practical use. However, the ethylene content is 10
When using random PP exceeding % (Comparative Example 7), the rigidity was significantly reduced. Also, the density is 0.95g/cc
In Example 8, in which PE was used, a decrease in rigidity was observed compared to Example 1, although it was within a practical range. On the other hand, when a material with a density of 0.93 g/cc was used (Comparative Example 8), the rigidity significantly decreased, which was inappropriate.
Claims (1)
ピレン／エチレンランダムコポリマー３０〜８０重量％
と、（Ｂ）密度が０．９４ｇ／ｃｃ以上であるポリエチ
レン１０〜５０重量％と、（Ｃ）プロピレンホモポリマ
ー０〜４０重量％とよりなる樹脂組成物をシート状に押
出成形してなる化粧板用ポリオレフィンシート。 ２、罫線加工によるヒンジ部を備えたハードケース又は
レターファイルの製作に用いられる、特許請求の範囲第
１項記載の化粧板用ポリオレフィンシート。[Claims] 1. (A) A propylene/ethylene random copolymer having an ethylene content of 10% by weight or less from 30 to 80% by weight
and (B) 10 to 50% by weight of polyethylene having a density of 0.94 g/cc or more, and (C) 0 to 40% by weight of propylene homopolymer. Polyolefin sheet for boards. 2. A polyolefin sheet for decorative laminate according to claim 1, which is used for manufacturing a hard case or a letter file having a hinge portion formed by ruled line processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29812389A JPH02160853A (en) | 1989-11-16 | 1989-11-16 | Polyolefin sheet for decorative panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29812389A JPH02160853A (en) | 1989-11-16 | 1989-11-16 | Polyolefin sheet for decorative panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02160853A true JPH02160853A (en) | 1990-06-20 |
| JPH043774B2 JPH043774B2 (en) | 1992-01-24 |
Family
ID=17855474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29812389A Granted JPH02160853A (en) | 1989-11-16 | 1989-11-16 | Polyolefin sheet for decorative panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02160853A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04214738A (en) * | 1990-12-12 | 1992-08-05 | Showa Denko Kk | Hollow molded article with hinge |
| JP2001114946A (en) * | 1999-10-19 | 2001-04-24 | Mitsubishi Chem Mkv Co | Decorative sheet film |
| US6815492B2 (en) | 2001-08-29 | 2004-11-09 | Shin-Etsu Chemical Co., Ltd. | Rubber parts for aircraft |
| KR100691464B1 (en) * | 2005-02-16 | 2007-03-09 | 삼성토탈 주식회사 | Polypropylene resin composition for decoration sheet |
| JPWO2015050263A1 (en) * | 2013-10-01 | 2017-03-09 | 住友化学株式会社 | Resin composition and heat dissipation component comprising the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070191554A1 (en) | 2006-02-13 | 2007-08-16 | Shin-Etsu Chemical Co., Ltd. | Curable fluoropolyether compositions and integral molded resin/rubber articles |
| JP5303864B2 (en) | 2007-05-21 | 2013-10-02 | 信越化学工業株式会社 | Curable fluoropolyether composition and integrally molded product of cured rubber and organic resin using the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516667U (en) * | 1978-07-18 | 1980-02-01 |
-
1989
- 1989-11-16 JP JP29812389A patent/JPH02160853A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516667U (en) * | 1978-07-18 | 1980-02-01 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04214738A (en) * | 1990-12-12 | 1992-08-05 | Showa Denko Kk | Hollow molded article with hinge |
| JP2001114946A (en) * | 1999-10-19 | 2001-04-24 | Mitsubishi Chem Mkv Co | Decorative sheet film |
| US6815492B2 (en) | 2001-08-29 | 2004-11-09 | Shin-Etsu Chemical Co., Ltd. | Rubber parts for aircraft |
| KR100691464B1 (en) * | 2005-02-16 | 2007-03-09 | 삼성토탈 주식회사 | Polypropylene resin composition for decoration sheet |
| JPWO2015050263A1 (en) * | 2013-10-01 | 2017-03-09 | 住友化学株式会社 | Resin composition and heat dissipation component comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH043774B2 (en) | 1992-01-24 |
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