JPS6058440A - Uncrosslinked polyethylene foam of low expansion ratio - Google Patents
Uncrosslinked polyethylene foam of low expansion ratioInfo
- Publication number
- JPS6058440A JPS6058440A JP16513683A JP16513683A JPS6058440A JP S6058440 A JPS6058440 A JP S6058440A JP 16513683 A JP16513683 A JP 16513683A JP 16513683 A JP16513683 A JP 16513683A JP S6058440 A JPS6058440 A JP S6058440A
- Authority
- JP
- Japan
- Prior art keywords
- density
- expansion ratio
- foam
- polyethylene
- low
- 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
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、改良された強度特性、耐熱性を有する非架橋
ポリエチレン低率発泡体に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to non-crosslinked polyethylene low modulus foams having improved strength properties and heat resistance.
従来、低率発泡体−３倍以下の発泡倍率−としては、高
圧法低密度ポリエチレン（以下、Ｉ（ＰＬＤＰＥと略す
）、ポリスチレンを基材とする発泡体が商品化されてい
るが、前者は耐熱性及び強靭性に、後者は強靭性に難点
があり、実用上多くの制約を受けている。Conventionally, foams based on high-pressure low-density polyethylene (hereinafter referred to as PLDPE) and polystyrene have been commercialized as low-modulus foams (with an expansion ratio of 3 times or less), but the former The latter has problems in heat resistance and toughness, and is subject to many practical restrictions.
また、線状低密度ポリエチレン（以下、ＬＬＤＰＦＩ：
と略す）は、ＨＰＬＤＰＥと比較して強靭性、耐熱性、
耐摩耗性に優れているが、その固有の溶融特性に基因す
る発泡成形性不良が克服されないために、非架橋低発泡
体として活用されていない。In addition, linear low density polyethylene (LLDPFI:
) has higher toughness, heat resistance,
Although it has excellent abrasion resistance, it has not been utilized as a non-crosslinked low foam material because the poor foam moldability caused by its unique melting properties cannot be overcome.
本発明者等は、上記の如き状況にある低発泡体において
、ＬＬＤＰＥを用い、架橋等の煩雑な工程を不要とした
経済性にも優れ、しかも始紡性、耐熱性に優れた低率発
泡体をうるべく、その溶融張力〔メルトインデックス測
定装置（Ａ Ｓ ＴＭ−ＤＩ２３ｇに準拠）を用い、ノ
ズル出口の溶融樹脂を一定速度（約７．ｓ５ｍ／分）に
て引き取る時に生ずる溶融体の張力をいう。〕に着目り
、ＨＰＬＤＰＥを配合した場合の検討を行った結果、図
面に示すようにＬＬＤＰＥ３［（量濃贋が２０係近傍で
溶融張力が極太値を示し、ＬＬＤＰＦＪが高濃度であっ
てもＬＬＤＰＥ単独に比べ溶融張力−（二昇効果が大き
いことを示している。溶融張力の大きい場合にセルの破
裂に起因する過発泡を防止する作用が生じ、均一発泡体
が得やすい傾向を有することを見出し、本発明を完成し
た。The present inventors used LLDPE to create a low-foaming product in the above-mentioned situation, which is economical because it does not require complicated processes such as crosslinking, and has low-rate foaming that has excellent starting properties and heat resistance. [Tension of the melt that occurs when drawing the molten resin at the nozzle outlet at a constant speed (approximately 7.s5 m/min) using a melt index measuring device (based on ASTM-DI23g)] means. ], and as a result of examining the case where HPLDPE is blended, we found that LLDPE3 [(The melt tension shows an extremely large value when the amount concentration is around 20 coefficients, and even if LLDPFJ is at a high concentration, LLDPE This shows that the melt tension - (two-rise effect) is larger than that of the melt tension alone.When the melt tension is large, there is an effect of preventing excessive foaming due to cell rupture, and it is easy to obtain a homogeneous foam. The present invention has been completed.
即ち、本発明は、線状低密度ポリエチレン１５〜７５重
量％と、高圧法低笛度ポリエチレン２５〜８５重量係と
からなる発泡倍率３以下の非架橋ポリエチレン低率発泡
体である、
本発明に用いられるＬＬＤＰＥとしては、その製造法に
は拘束されず、エチレンとαオレフィンとの共重合体で
あり、αオレフイン含率は２０重量％以下で、αオレフ
ィンとしてはブテン−１，ペンテン−１，ヘプテン−１
，４メチルインテン−１、ヘキセン−１，オクテン−１
等が挙げられる。That is, the present invention is a non-crosslinked polyethylene low-ratio foam with an expansion ratio of 3 or less, which is composed of 15-75% by weight of linear low-density polyethylene and 25-85% by weight of high-pressure low-density polyethylene. The LLDPE used is not restricted by its manufacturing method, and is a copolymer of ethylene and α-olefin, with an α-olefin content of 20% by weight or less, and the α-olefins include butene-1, pentene-1, heptene-1
, 4 methylintene-1, hexene-1, octene-1
etc.
発泡成形性、物性改良の観点からオクテン−１が特に好
ましい。Octene-1 is particularly preferred from the viewpoint of improving foam moldability and physical properties.
ＬＬＤＰＥの基本特性としてのメルトインデックス（以
下Ｍｌと省略）は０．１〜１０．如ましくは０．３〜３
．０である。The melt index (hereinafter abbreviated as Ml), which is a basic characteristic of LLDPE, is 0.1 to 10. It is 0.3~3
．． It is 0.
ＭＩＩＯ以上では、インフレジョン成形時のノ々プル形
成及び発泡成形性が低下し、又ＭＩ０．１以下では押出
成形性が著るしく低下する。If the MIIO is higher than that, no-pull formation during inflation molding and foaming moldability will be reduced, and if the MI is lower than 0.1, the extrusion moldability will be significantly lowered.
樹脂密度は０．９１５〜０．９４０が通用されるが、発
泡成形性、物性改良の面から特に０．９１５〜０．９３
０が好ましい。A resin density of 0.915 to 0.940 is commonly used, but from the viewpoint of foam moldability and improvement of physical properties, it is particularly 0.915 to 0.93.
0 is preferred.
本発明に用いられるＨＰＬＤＰＥはその製造法には拘束
されず、樹脂密度０．９１５〜０．９３０ ｇ−／ｃ、
ｒｄ。The HPLDPE used in the present invention is not restricted by its manufacturing method, and has a resin density of 0.915 to 0.930 g/c,
rd.
Ｍ Ｉ Ｏ，１〜３０ の通常押出成形に用いられるも
のである。It is commonly used for extrusion molding of MIO, 1 to 30.
酢ヒ含率１０重Ｊｉ％以下のエチレン−酢酸ビニル共重
合体も適用される。An ethylene-vinyl acetate copolymer having an arsenic content of 10% by weight or less is also applicable.
ＬＬＤＰＥとの配合時の組合せとし−ｒ、ＨＰＬＤＰＥ
のＭＩは配合組合せ相手組成であるＩ、ＬＤＰＥのＭＩ
、と同等以下とした方が、発泡成形性の向上により有効
である。When combined with LLDPE-r, HPLDPE
The MI of I is the combination partner composition, and the MI of LDPE
, it is more effective to improve foam moldability.
本発明に用いら１する化学発泡剤は特に制約はないが、
Ｎ！ 発生型高温分解タイプの発泡剤であるジアゾカー
２ンアミド系及びジニトロンベンタメチレンテトラミン
等が有用である。There are no particular restrictions on the chemical blowing agent used in the present invention, but
N! Diazocaramide-based foaming agents, dinitrone bentamethylenetetramine, etc., which are generating and high-temperature decomposition type blowing agents, are useful.
核形成剤、助剤との併用も可能である。It is also possible to use it in combination with a nucleating agent and an auxiliary agent.
本発明の低率発泡体は、ＬＬＤＰＥ１５〜７５重量係、
ＨＰＬＤＰＥ２５〜８５重量％及び化学発泡剤０．２〜
２ ＰＨＲをトライブレンド法による混合または公知の
溶融混合装置を用いて均一の混合体に造粒する方法によ
り混合したのち、溶融混合装置に投入し、環状金型より
連続的に押出しながら発泡させる。尚、化学発泡剤は、
マスターノマッチ化したものを用いてもよい。ＬＬＤＰ
Ｉが１５重量係未満では強度特性、耐熱性等が発揮され
ない。また、７５重景係を超える量では発泡成形性が不
良で均一な発泡体を得ることが困難である。The low ratio foam of the present invention has LLDPE 15 to 75 weight ratio,
25-85% by weight of HPLDPE and 0.2-85% chemical blowing agent
2. PHR is mixed by the triblend method or by granulation into a uniform mixture using a known melt mixing device, and then put into a melt mixing device and foamed while being continuously extruded from an annular mold. In addition, the chemical blowing agent is
A master no-matched version may also be used. LLDP
When I is less than 15% by weight, strength characteristics, heat resistance, etc. are not exhibited. Further, if the amount exceeds 75%, the foaming moldability is poor and it is difficult to obtain a uniform foam.
本発明の低率発泡体は、強靭性、耐摩耗性、耐熱性に優
れ、緩衝性を有するので、包装飼料として使用され、ま
た、ヒートシールも容易であるので袋物とし、でも有用
であり、さらに、収縮ラベルとして利用することも可能
である。The low-modulus foam of the present invention has excellent toughness, abrasion resistance, and heat resistance, and has cushioning properties, so it can be used as packaged feed, and since it can be easily heat-sealed, it is also useful as a bag. Furthermore, it can also be used as a shrink label.
以下、実施例及び比較例により本発明を説明する。The present invention will be explained below with reference to Examples and Comparative Examples.
実施例１〜１２及び比較例１〜１４
表−１に示すＬＬＤＰＥ％ＨＰＤＰＥ及び発泡剤を用い
、表−１に示す配合割合にょシ低率発泡体を。Examples 1 to 12 and Comparative Examples 1 to 14 Using the LLDPE%HPDPE and foaming agent shown in Table 1, a low percentage foam was produced at the blending ratio shown in Table 1.
製造し、溶融張カ、発泡成形性、発泡状況及びＡＳＴＭ
Ｄ１７０９による衝撃強度の測定を行った。Manufacturing, melt tension, foam moldability, foaming condition and ASTM
Impact strength was measured using D1709.
その結果を表−１に示す。The results are shown in Table-1.
なお、発泡はインフレーションフィルム成Ｍ装置（モダ
ンマシナリーＥＡ−ｓｏ）を用い、スクリューＬ／Ｄ＝
２８、圧縮比３５、グイとしてスパイラル型環状グイ１
００朋ψ、ギャップ１．ＯＢで実施した。Note that foaming was performed using a blown film forming device (Modern Machinery EA-so), with screw L/D=
28, compression ratio 35, spiral type annular gooey 1 as gooey
00 ψ, gap 1. It was conducted in OB.
（以下余白）(Margin below)
図面は、本発明の実施例及び比較例における樹脂配合割
合と溶融張力の関係を示すグンフである。
特許出願人 旭化成工業株式会社The drawings are diagrams showing the relationship between resin blending ratio and melt tension in Examples and Comparative Examples of the present invention. Patent applicant Asahi Kasei Industries, Ltd.
Claims (1)
密度ポリエチレン２５〜８５重ｉ％とからなる発泡倍率
３倍以下の非架橋ポリエチレン低率発泡体Non-crosslinked polyethylene low ratio foam with a foaming ratio of 3 times or less, consisting of linear low density polyethylene 15 to 75% by weight and high pressure processed low density polyethylene 25 to 85% by weight
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16513683A JPS6058440A (en) | 1983-09-09 | 1983-09-09 | Uncrosslinked polyethylene foam of low expansion ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16513683A JPS6058440A (en) | 1983-09-09 | 1983-09-09 | Uncrosslinked polyethylene foam of low expansion ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6058440A true JPS6058440A (en) | 1985-04-04 |
| JPS6330935B2 JPS6330935B2 (en) | 1988-06-21 |
Family
ID=15806578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16513683A Granted JPS6058440A (en) | 1983-09-09 | 1983-09-09 | Uncrosslinked polyethylene foam of low expansion ratio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058440A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60222222A (en) * | 1984-04-20 | 1985-11-06 | Japan Styrene Paper Co Ltd | Preparation of polyethylene extrusion foaming body |
| JPH02217220A (en) * | 1989-02-20 | 1990-08-30 | Sekisui Plastics Co Ltd | Production of polyethylene-based foam |
| FR2662538A1 (en) * | 1990-05-23 | 1991-11-29 | Framatome Sa | Device and method for decontaminating the internal surface of the wall of a nuclear reactor vessel |
| JP2007527449A (en) * | 2003-07-07 | 2007-09-27 | ダウ グローバル テクノロジーズ インコーポレイティド | Thin foamed polyethylene sheet |
| JP2011102379A (en) * | 2009-10-13 | 2011-05-26 | Sumitomo Chemical Co Ltd | Foamed sheet |
| WO2017036624A1 (en) * | 2015-09-02 | 2017-03-09 | Sika Technology Ag | Heat expandable foam |
| JP2020158588A (en) * | 2019-03-26 | 2020-10-01 | 株式会社カネカ | Polyethylene-based non-cross-linked extruded foam |
| WO2022196372A1 (en) * | 2021-03-15 | 2022-09-22 | 株式会社ジェイエスピー | Polyethylene resin foamed particle, and method for producing same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092967A (en) * | 1973-12-22 | 1975-07-24 | ||
| JPS5236159A (en) * | 1975-09-18 | 1977-03-19 | Sekisui Plastics | Process for producing polyolefin foam |
| JPS55127440A (en) * | 1979-02-22 | 1980-10-02 | Dow Chemical Co | Compression strength improved polyethylene blend foam |
-
1983
- 1983-09-09 JP JP16513683A patent/JPS6058440A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092967A (en) * | 1973-12-22 | 1975-07-24 | ||
| JPS5236159A (en) * | 1975-09-18 | 1977-03-19 | Sekisui Plastics | Process for producing polyolefin foam |
| JPS55127440A (en) * | 1979-02-22 | 1980-10-02 | Dow Chemical Co | Compression strength improved polyethylene blend foam |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60222222A (en) * | 1984-04-20 | 1985-11-06 | Japan Styrene Paper Co Ltd | Preparation of polyethylene extrusion foaming body |
| JPH0443934B2 (en) * | 1984-04-20 | 1992-07-20 | Jsp Corp | |
| JPH02217220A (en) * | 1989-02-20 | 1990-08-30 | Sekisui Plastics Co Ltd | Production of polyethylene-based foam |
| FR2662538A1 (en) * | 1990-05-23 | 1991-11-29 | Framatome Sa | Device and method for decontaminating the internal surface of the wall of a nuclear reactor vessel |
| KR101287732B1 (en) * | 2003-07-07 | 2013-07-18 | 다우 글로벌 테크놀로지스 엘엘씨 | Thin foamed polyethylene sheets |
| JP2007527449A (en) * | 2003-07-07 | 2007-09-27 | ダウ グローバル テクノロジーズ インコーポレイティド | Thin foamed polyethylene sheet |
| JP2011102379A (en) * | 2009-10-13 | 2011-05-26 | Sumitomo Chemical Co Ltd | Foamed sheet |
| WO2017036624A1 (en) * | 2015-09-02 | 2017-03-09 | Sika Technology Ag | Heat expandable foam |
| CN107922661A (en) * | 2015-09-02 | 2018-04-17 | Sika技术股份公司 | The foam of heat-swellable |
| EP3344689B1 (en) | 2015-09-02 | 2020-07-22 | Sika Technology AG | Heat expandable foam |
| US10899902B2 (en) | 2015-09-02 | 2021-01-26 | Sika Technology Ag | Heat expandable foam |
| JP2020158588A (en) * | 2019-03-26 | 2020-10-01 | 株式会社カネカ | Polyethylene-based non-cross-linked extruded foam |
| WO2022196372A1 (en) * | 2021-03-15 | 2022-09-22 | 株式会社ジェイエスピー | Polyethylene resin foamed particle, and method for producing same |
| JP2022141166A (en) * | 2021-03-15 | 2022-09-29 | 株式会社ジェイエスピー | Polyethylene-based resin foam particle, and method for producing polyethylene-based resin foam particle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6330935B2 (en) | 1988-06-21 |
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