JPS6347128A - Method for maturing olefin-based high expansion molded body - Google Patents
Method for maturing olefin-based high expansion molded bodyInfo
- Publication number
- JPS6347128A JPS6347128A JP61190429A JP19042986A JPS6347128A JP S6347128 A JPS6347128 A JP S6347128A JP 61190429 A JP61190429 A JP 61190429A JP 19042986 A JP19042986 A JP 19042986A JP S6347128 A JPS6347128 A JP S6347128A
- Authority
- JP
- Japan
- Prior art keywords
- maturing
- temperature
- molded item
- shrinkage
- foam
- 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
- 238000000034 method Methods 0.000 title claims abstract description 13
- 150000001336 alkenes Chemical class 0.000 title claims description 9
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 title claims description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 230000032683 aging Effects 0.000 claims description 17
- 230000005070 ripening Effects 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims 1
- -1 polypropylene Polymers 0.000 abstract description 6
- 239000004743 Polypropylene Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 229920001155 polypropylene Polymers 0.000 abstract description 5
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract description 2
- 239000004703 cross-linked polyethylene Substances 0.000 abstract description 2
- 229920005672 polyolefin resin Polymers 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 10
- 239000006260 foam Substances 0.000 description 8
- 238000005187 foaming Methods 0.000 description 7
- 238000010097 foam moulding Methods 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 230000002431 foraging effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はオレフィン系高発泡成形体の熟成方法に関し、
特に収縮率の低いオレフィン系高発泡成形体を提供する
熟成方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for aging a highly foamed olefin-based molded product.
In particular, the present invention relates to a ripening method for providing a highly foamed olefin-based molded article with a low shrinkage rate.
（従来の技術及び解決すべき問題点）
発泡成形品を成型機より取りだした後オーブンまたは恒
温室等で４０〜６０℃で一昼夜加熱、乾燥、熟成させる
ことは従来より行、ｂｔ＋ている（例えば、特公昭６］
、−１１１８３号公報）。しかしながら、この熟成工程
を経た発泡成形品でもその後、かなりの収縮を呈し、特
に、高発泡倍率の成形品は熟成後においても約２０〜５
０程度の収縮率（注収縮率については後述する）を示す
。(Prior art and problems to be solved) It has been conventional practice to take out foam molded products from a molding machine and then heat them at 40 to 60°C overnight at 40 to 60°C, dry them, and age them (for example, , Tokko Sho 6]
, No.-11183). However, even foamed molded products that have gone through this aging process exhibit considerable shrinkage, and in particular, molded products with a high expansion ratio are approximately 20 to 50% shrinkage even after aging.
It exhibits a shrinkage rate of about 0 (note: the shrinkage rate will be described later).
本発明者らはこのような成形品の収縮率を減少せしめる
ため種々検討した結果、従来の熟成工程に加えて更に従
来の熟成温度より１０℃ないし３０℃高い温度に少なく
とも１時間放置することにより、発泡成形品のその後の
収縮が著しく改善されることを見出し本発明を完成した
もので、本発明の目的は収縮率の小さいオレフィン系高
発泡成形品を提供するにある。The inventors of the present invention have conducted various studies to reduce the shrinkage rate of such molded products, and found that in addition to the conventional aging process, the molded products are left at a temperature 10 to 30 degrees Celsius higher than the conventional aging temperature for at least one hour. discovered that the subsequent shrinkage of foamed molded products was significantly improved, and completed the present invention.The purpose of the present invention is to provide a highly foamed olefin-based molded product with a low shrinkage rate.
（問題点の解決手段）
すなわち、本発明は少なくとも発泡倍率３０倍を有する
オレフィン系高発泡成形体を成型機から取りだし熟成す
る方法において、該成形品を４０〜６０℃で一昼夜加熱
、乾燥、熟成する第一熟成工程およびこの第一熟成工程
を経た成形品を第−熟成工程の熟成温度より１０℃ない
し３０℃高い温度で更に少なくとも１時間放置する第二
熟成工程からなることを特徴とするオレフィン系高発泡
成形体の熟成方法である。本発明におけるオレフィン系
高発泡成形体とはポリエチレン、ポリプロピレン、α−
オレフィン等の脂肪族炭化水素の単独重合体、若しくは
これらとスチレン、α−メチルスチレン、Ｐ−メチルス
チレン等の芳香族炭化水素の共重合体、あるいはこれら
重合体を架橋したものものからなる樹脂粒子にブタン、
プロパン、ペンタン等の炭化水素、あるいはトリクロロ
モノフルオロメタン、ジクロロジフルオロメタン、ジク
ロロテトラフルオロエタン等のハロゲン化炭化水素等の
発泡剤を圧入して得た発泡性樹脂粒子を約１００〜１５
０℃の加熱水蒸気等で加熱発泡させて予備発泡粒子とし
、これを型内に充填して再加熱して粒子間を融着させて
得た発泡成形体をいい、発泡倍率とは発泡成形体体積を
発泡成形体重量で除した値であって、本発明の高発泡体
とは発泡倍率３０倍以上のものを指すのである。従来、
このような発泡成形体は４０〜６０℃の温度のオーブン
中で一昼夜放置して熟成を行っていたが、本発明ではこ
の従来の熟成工程を経たものについて、更に従来の熟成
温度より１０〜３０℃高い温度で少なくとも１時間放置
するものであって、第一熟成温度より１０℃以内の高い
温度で長時間放置しても、その収縮率は余り改善されず
、また３０℃より高い温度では発泡成形品の収縮率を大
きくするような悪い影響を与えることへなる、そしてこ
の第二熟成工程の熟成温度は発泡成形品を構成するオレ
フィン樹脂の種類によって異なるが、例えば架橋ポリエ
チレンの場合に７０℃近傍、ポリプロピレンの場合には
８０℃を越えない温度が望ましい。(Means for Solving Problems) That is, the present invention provides a method for taking out a highly foamed olefin molded product having an expansion ratio of at least 30 times from a molding machine and aging it, in which the molded product is heated at 40 to 60°C overnight, dried, and aged. and a second ripening step in which the molded product that has passed through the first ripening step is further left for at least 1 hour at a temperature 10°C to 30°C higher than the ripening temperature in the second ripening step. This is a method for aging highly foamed molded products. In the present invention, the olefin-based highly foamed molded product refers to polyethylene, polypropylene, α-
Resin particles made of homopolymers of aliphatic hydrocarbons such as olefins, copolymers of these with aromatic hydrocarbons such as styrene, α-methylstyrene, and P-methylstyrene, or crosslinked products of these polymers. butane,
Approximately 100 to 15
A foam molded product obtained by heating and foaming with heated steam at 0°C to obtain pre-expanded particles, which are then filled into a mold and reheated to fuse the particles.The expansion ratio refers to the foam molded product. It is the value obtained by dividing the volume by the weight of the foam molding, and the highly foamed product of the present invention refers to one with an expansion ratio of 30 times or more. Conventionally,
Such foamed molded products were aged by being left overnight in an oven at a temperature of 40 to 60°C, but in the present invention, products that have gone through this conventional aging process are further aged by 10 to 30°C above the conventional aging temperature. It is left for at least 1 hour at a temperature higher than the first aging temperature, and even if left for a long time at a temperature 10°C higher than the first aging temperature, the shrinkage rate will not improve much, and if the temperature is higher than 30°C, foaming will occur. This will have a negative effect such as increasing the shrinkage rate of the molded product.The aging temperature in this second aging step varies depending on the type of olefin resin that composes the foamed molded product, but for example, in the case of crosslinked polyethylene, it is 70°C. In the case of polypropylene, a temperature not exceeding 80° C. is desirable.
以下、本発明を実施例をもって更に具体的に説明する。Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例 １
ポリエチレン粒子に触媒を含有したスチレンモノマーを
吸収させ、且つ、グラフト重合したポリエチレン−スチ
レン共重合体樹脂粒子の予備発泡粒（平均倍率７５±２
倍）を空気で加圧することにより内圧を付与した後、発
泡成型機により発泡倍率７３〜７６倍の板物成形品（６
０Ｘ ４０ Ｘ ２．５国）を得た。Example 1 Pre-expanded particles of polyethylene-styrene copolymer resin particles (average magnification of 75±2
After applying internal pressure by pressurizing the foam with air, a foam molding machine is used to create a plate molded product with a foaming ratio of 73 to 76
0 x 40 x 2.5 countries).
この発泡成形品を成型機より取り出した直後、５０℃の
オーブンで１日間加熱し、オーブンより取り出した後、
成形品が冷却してから収縮率を測定したところ、収縮率
は２９．８であった。この収縮率とは発泡成形品の縦方
向と横方向の収縮率の平均値を１０００倍した値であり
、以下、収縮率はこの値をもって示す。成形後、１日後
から２日後の間に第二熟成工程を行った。すなわち、成
形品を７０℃で２時間加熱した。収縮率は１９．８であ
った。Immediately after taking out this foam molded product from the molding machine, it was heated in an oven at 50°C for one day, and after being taken out from the oven,
When the shrinkage rate of the molded article was measured after cooling, the shrinkage rate was 29.8. This shrinkage rate is a value obtained by multiplying the average value of the shrinkage rates of the foamed molded article in the vertical and horizontal directions by 1000, and hereinafter, the shrinkage rate will be expressed using this value. A second ripening step was performed between one and two days after molding. That is, the molded article was heated at 70° C. for 2 hours. The shrinkage rate was 19.8.
比較のため、第−熟成工程及び第二熟成工程の条件を種
々変えて収縮率を測定した。その結果を第１表に示す。For comparison, the shrinkage rate was measured while varying the conditions of the first ripening step and the second ripening step. The results are shown in Table 1.
第１表
４一
実施例２〜３
実施例１の発泡性ボエチレンースチレン共重合体樹脂粒
子を予備発泡した発泡粒子（６３倍）を空気で加圧する
ことにより内圧を付与したあと、発泡成形機を用いて発
泡倍率６０倍の板物成形品（３０Ｘ ４０×２．５印）
を得た。熟成条件を種々変えて収縮率を測定した。その
結果を第２表に示す。Table 1 4 - Examples 2 to 3 After applying internal pressure by pressurizing the foamed particles (63 times) obtained by pre-foaming the expandable boethylene-styrene copolymer resin particles of Example 1 with air, foam molding was performed. Formed plate products with a foaming ratio of 60 times using a machine (30X 40×2.5 marks)
I got it. The shrinkage rate was measured under various aging conditions. The results are shown in Table 2.
以下余白
以 ｌゝシ４・１−１
実施例４
ハロゲン化炭化水素を発泡剤として高圧下のオートクレ
ーブから樹脂粒子を分散媒と共に放出することにより得
たポリプロピレン発泡粒子を空気で加圧することにより
内圧を付与した後発泡成形機により発泡成形品を得た。Below is the margin. 4.1-1 Example 4 Polypropylene foam particles were obtained by releasing resin particles together with a dispersion medium from an autoclave under high pressure using a halogenated hydrocarbon as a blowing agent. By pressurizing the polypropylene foam particles with air, the internal pressure After applying this, a foam molded product was obtained using a foam molding machine.
成形品の発泡倍率と熟成条件を種々変えた場合の収縮率
を測定し、その結果を第３表に示す。The shrinkage rates of the molded products were measured when the expansion ratio and aging conditions were varied, and the results are shown in Table 3.
第３表
収縮率（Ｘｉ／１０００）
表中、（ｉ）、（ｉｊ）は第−熟成工程及び第；熟成工
程をそれぞれ表わす。Table 3 Shrinkage Rate (Xi/1000) In the table, (i) and (ij) represent the 1st-ripening step and the 1st-ripening step, respectively.
この結果より明らかなように、成形品の発泡倍率３０倍
程度では第二熟成工程を採用したことによる効果は余り
認められないが発泡倍率４０倍がら上＝７−
になるにつれて第二熟成工程による収縮率の低下が著し
い。As is clear from this result, when the foaming ratio of the molded product is about 30 times, the effect of adopting the second aging process is not so noticeable, but as the foaming ratio increases to 40 times and above = 7-, the second aging process becomes more effective. Significant decrease in shrinkage rate.
（効果）
以」二述べたように、本発明は第一熟成工程終了後、更
に温度を１０〜３０℃」二げて少なくとも１時間加熱す
る第二熟成工程を経ることによって発泡成形品の収縮回
復が促進され成形品の収縮率を低くする効果を奏するの
である。(Effects) As mentioned above, in the present invention, after the first aging step, the shrinkage of the foamed molded product is reduced by further increasing the temperature to 10 to 30°C and heating it for at least 1 hour. This has the effect of promoting recovery and lowering the shrinkage rate of the molded product.
Claims (1)
成形体を成型機から取りだし熟成する方法において、該
成形品を４０〜６０℃で一昼夜加熱、乾燥、熟成する第
一熟成工程およびこの第一熟成工程を経た成形品を第一
熟成工程の熟成温度より１０℃ないし３０℃高い温度で
更に少なくとも１時間放置する第二熟成工程からなるこ
とを特徴とするオレフィン系高発泡成形体の熟成方法A method of taking out a highly foamed olefin molded product having an expansion ratio of at least 30 times from a molding machine and aging it includes a first maturing step of heating, drying, and maturing the molded product at 40 to 60°C for a day and a night, and this first maturing step. A method for ripening a highly foamed olefin molded article, comprising a second ripening step in which the molded article is further left for at least 1 hour at a temperature 10° C. to 30° C. higher than the ripening temperature in the first ripening step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61190429A JPS6347128A (en) | 1986-08-15 | 1986-08-15 | Method for maturing olefin-based high expansion molded body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61190429A JPS6347128A (en) | 1986-08-15 | 1986-08-15 | Method for maturing olefin-based high expansion molded body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6347128A true JPS6347128A (en) | 1988-02-27 |
| JPH0464302B2 JPH0464302B2 (en) | 1992-10-14 |
Family
ID=16257980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61190429A Granted JPS6347128A (en) | 1986-08-15 | 1986-08-15 | Method for maturing olefin-based high expansion molded body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6347128A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999067471A3 (en) * | 1998-06-20 | 2000-08-03 | Mipo Chemicals Co Ltd | Method and apparatus for molding continuously a foamed plastic board |
| KR100419847B1 (en) * | 1997-09-09 | 2006-03-23 | 주식회사 삼양사 | Aging method of preform |
| WO2011086938A1 (en) | 2010-01-15 | 2011-07-21 | 株式会社カネカ | Expanded particle of noncrosslinked polyethylene-based resin and expansion molded article of noncrosslinked polyethylene-based resin |
| WO2013011951A1 (en) | 2011-07-15 | 2013-01-24 | 株式会社カネカ | Antistatic non-crosslinked foamed polyethylene resin particles and molded non-crosslinked foamed polyethylene resin body |
| CN108727678A (en) * | 2017-04-18 | 2018-11-02 | 株式会社Jsp | Composite molded product, its manufacturing method, automobile seat cushion core material |
| CN114234571A (en) * | 2021-11-17 | 2022-03-25 | 安徽墙煌彩铝科技有限公司 | Curing process for radiation refrigeration film-coated metal plate |
-
1986
- 1986-08-15 JP JP61190429A patent/JPS6347128A/en active Granted
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100419847B1 (en) * | 1997-09-09 | 2006-03-23 | 주식회사 삼양사 | Aging method of preform |
| WO1999067471A3 (en) * | 1998-06-20 | 2000-08-03 | Mipo Chemicals Co Ltd | Method and apparatus for molding continuously a foamed plastic board |
| WO2011086938A1 (en) | 2010-01-15 | 2011-07-21 | 株式会社カネカ | Expanded particle of noncrosslinked polyethylene-based resin and expansion molded article of noncrosslinked polyethylene-based resin |
| US8779019B2 (en) | 2010-01-15 | 2014-07-15 | Kaneka Corporation | Expanded particle of noncrosslinked polyethylene-based resin and expansion molded article of noncrosslinked polyethylene-based resin |
| US9193842B2 (en) | 2010-01-15 | 2015-11-24 | Kaneka Corporation | Method for producing noncrosslinked polyethylene resin expanded particle (first stage expanded particle) and re-expanded noncrosslinked polyethylene resin expanded particle |
| WO2013011951A1 (en) | 2011-07-15 | 2013-01-24 | 株式会社カネカ | Antistatic non-crosslinked foamed polyethylene resin particles and molded non-crosslinked foamed polyethylene resin body |
| US9688828B2 (en) | 2011-07-15 | 2017-06-27 | Kaneka Corporation | Antistatic non-crosslinked foamed polyethylene resin particles and molded non-crosslinked foamed polyethylene resin body |
| CN108727678A (en) * | 2017-04-18 | 2018-11-02 | 株式会社Jsp | Composite molded product, its manufacturing method, automobile seat cushion core material |
| CN114234571A (en) * | 2021-11-17 | 2022-03-25 | 安徽墙煌彩铝科技有限公司 | Curing process for radiation refrigeration film-coated metal plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0464302B2 (en) | 1992-10-14 |
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