JPS6016896B2 - Method for manufacturing highly elastic polyurethane foam molded products - Google Patents

Method for manufacturing highly elastic polyurethane foam molded products

Info

Publication number
JPS6016896B2
JPS6016896B2 JP53089996A JP8999678A JPS6016896B2 JP S6016896 B2 JPS6016896 B2 JP S6016896B2 JP 53089996 A JP53089996 A JP 53089996A JP 8999678 A JP8999678 A JP 8999678A JP S6016896 B2 JPS6016896 B2 JP S6016896B2
Authority
JP
Japan
Prior art keywords
mold
gas
polyurethane foam
foam molded
highly elastic
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
Application number
JP53089996A
Other languages
Japanese (ja)
Other versions
JPS5517511A (en
Inventor
洋之 川井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ikeda Corp
Original Assignee
Ikeda Bussan Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ikeda Bussan Co Ltd filed Critical Ikeda Bussan Co Ltd
Priority to JP53089996A priority Critical patent/JPS6016896B2/en
Publication of JPS5517511A publication Critical patent/JPS5517511A/en
Publication of JPS6016896B2 publication Critical patent/JPS6016896B2/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/58Moulds
    • B29C44/588Moulds with means for venting, e.g. releasing foaming gas

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 本発明は、高弾性ポリウレタンフオーム成形物の製造方
法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a highly elastic polyurethane foam molded article.

詳しく述べると、車両、家具等の座席用クッション材等
に有用な高弾性ポリウレタンフオーム成形物の製造方法
に関するものである。高弾性ポIJウレタンフオーム(
highresilienceゆam、以下HRフオー
ムという。
More specifically, the present invention relates to a method for manufacturing a highly elastic polyurethane foam molded product useful for cushioning materials for seats in vehicles, furniture, and the like. High elasticity polyurethane foam (
High resilience form, hereinafter referred to as HR form.

)は、高い弾性ないし優れたクッション性を有している
ので、車両、航空機、家具等の座席用クッション材とし
て広く使用されている。その発泡工程は約80午○の比
較的低い温度で行なわれるが、常圧付近で行なうと得ら
れるフオーー成形物の密度にむらが生じ均一な製品が得
られないので、均一なフオーム成形物を得るためには発
泡圧を高くして成形型の内圧を一定に保つ必要がある。
したがって、第1図に示すように、使用される成形型1
としては密閉式が用いられており、ガス抜きのための微
細孔(通常、直径3肋以下)2が成形型1の上型(蓋体
)3に多数設けられ、しかもガスの放出が円滑に行なわ
れるように、横型となっている。しかしながら、このよ
うな成形型は、底要部が縦方向より長い、いわゆる横型
であるので、前記のごとき多数のガス抜き微細孔2を必
要とするが、この微細孔は極めて小さいので、生成した
フオーム4がつまるので、その都度掃除が必要となるば
かりでなく、これらの成形型は通常アルミニウム材等で
作られているので、掃除を繰返すうちに微細孔が大きく
なり、このための成形型は発泡時に所定の内圧を保てな
くなり、使用不能となる。
) has high elasticity or excellent cushioning properties and is therefore widely used as cushioning materials for seats in vehicles, aircraft, furniture, etc. The foaming process is carried out at a relatively low temperature of about 80 pm, but if it is carried out at around normal pressure, the density of the foam molded product obtained will be uneven and a uniform product cannot be obtained. In order to obtain this, it is necessary to increase the foaming pressure and keep the internal pressure of the mold constant.
Therefore, as shown in FIG.
A closed type is used for the mold, and a large number of fine holes (usually 3 holes or less in diameter) 2 for gas release are provided in the upper mold (lid) 3 of the mold 1, and the gas can be released smoothly. As it is done, it is horizontal. However, since such a mold is a so-called horizontal type in which the bottom part is longer than the vertical direction, it requires a large number of gas venting micropores 2 as described above, but since these micropores are extremely small, the generated Since the foam 4 gets clogged, not only does it have to be cleaned every time, but these molds are usually made of aluminum, etc., so as the cleaning is repeated, the micropores become larger, and the molds for this purpose need to be cleaned. When foaming, it becomes impossible to maintain the specified internal pressure, making it unusable.

したがって、成形型の寿命が短いという欠点があった。
このような微細孔の拡大を防止するために、第2図に示
すように、微細孔形成部のみに真ちゆう、砲金等の金属
ピース5を鋳込み、このピース5にガス抜き用微細孔2
を穿設する方法が提案されている。
Therefore, there was a drawback that the life of the mold was short.
In order to prevent the enlargement of such micropores, as shown in FIG.
A method has been proposed for drilling holes.

しかしながら、該方法におけるかかる成形型は、その製
作が極めて困難であるためコスト高とならざるを得ない
。かかる欠点を改善するために、第3図に示すようにガ
ス抜き孔2を大きく形成し、このガス抜き孔2を覆うよ
うに頂部6に微細孔7を備えた筒状体8を固着してなる
上型3の使用が提案されている。
However, such a mold in this method is extremely difficult to manufacture, and therefore costs are inevitably high. In order to improve this drawback, as shown in FIG. 3, the gas vent hole 2 is formed large, and a cylindrical body 8 having fine holes 7 is fixed to the top 6 so as to cover the gas vent hole 2. It has been proposed to use an upper mold 3 that is

しかしながら、このような成形型も同様に製作困難であ
り、コスト高とならざるを得ないばかりでなく、かかる
筒状体8は上型の周縁部付近のガス抜き孔2には取付け
ることができないという欠点がある。また、最近、自動
車座席用クッション材は薄物が多く使用されるようにな
ってきたが、薄物成形体の場合、パーティングラィンを
中央に取ると、発泡原液注入の際、成形型から流出する
ので、前記のごとき型を用いての薄物成形体の製造は困
難であった。
However, such a mold is also difficult to manufacture, and not only does it have to be costly, but also the cylindrical body 8 cannot be attached to the gas vent hole 2 near the periphery of the upper mold. There is a drawback. In addition, recently, thin materials have been increasingly used as cushioning materials for automobile seats, but in the case of thin molded materials, if the parting line is placed in the center, the foaming solution may flow out of the mold when injected. However, it has been difficult to produce thin molded articles using the molds described above.

さらに、前記のごとき横型の場合、発泡時に使用される
加熱炉に多大のスペースを要するという欠点があった。
本発明は、前記のごとき従来法の諸欠点を解消するため
になされたもので、左右の成形型よりなる縦型成形型の
頂部に比較的大きなガス通路を設け、該通路を覆うよう
にその周囲に頂部付近にガス抜き用微細孔を備えた椀状
体を固着して前記ガス通路に運通するガス貯蔵室を設け
てなる前記成形型にポリウレタン発泡原液を供給し、該
成形型内で加熱発泡させることを特徴とする高弾性ポリ
ウレタンフオーム成形物の製造方法である。
Furthermore, in the case of the horizontal type as described above, there was a drawback that a large amount of space was required for the heating furnace used during foaming.
The present invention was made in order to eliminate the various drawbacks of the conventional method as described above, and a relatively large gas passage is provided at the top of a vertical mold consisting of left and right molds, and a gas passage is provided so as to cover the passage. A polyurethane foaming stock solution is supplied to the mold, which has a bowl-shaped body with fine holes for degassing near the top and a gas storage chamber for communicating with the gas passage, and is heated in the mold. This is a method for producing a highly elastic polyurethane foam molded product, which is characterized by foaming.

本発明使用されるポリウレタン発泡原液とは、HRフオ
ームを生成する原料混合物であって、ポリイソシアネー
ト、ポリマーポリオール等によりなる組成物である。ポ
リィソシアネートとしては、2.4−トリレンジイソシ
アネート、65/35トリレンジイソシアネート、80
/20トリレンジイソシアネート、4,4′ーシフエニ
ルメタンジイソシアネート、ポリメチレンポリフエニル
イソシアネート、N,N′一(4,4′ージメチル−3
,3′ージフエニルジイソシアネート)ウレジオン、4
,4,4″ートリメチルー3,3′,3″ートリイソシ
アネート一2,4,6ートリフエニルシアヌレート、水
素化MD1、水素化トリレンジィソシアネート等がある
。ポリマーポリオールとしては、ポリエーテルポリオー
ルやポリエステルポリオ−ルに、アクリロニトリル、メ
タクリロニトリル、ブタジエン、スチレン、塩化ビニル
、塩化ビニリデン、クロロブレン、メチルメタクリレー
ト、エチルメタクリレート、メチルアクリレート、エチ
ルアクリレート、プチルアクリレート、酢酸ビニル等の
モノマ一をグラフト重合したもの、ポリエーテルポリオ
ールやポリエステルポリオールに、予め重合させたポリ
エチレン、ポリアクリロニトリル、ポリメタクリロニト
リル、ポリスチレン、ポリブタジエン、ポリ(プタジェ
ンースチレン)、ポリ塩化ビニル、ポリ塩化ビニリデン
、ポリクロロプレン、ポリメチルメタクリレート、ポリ
メチルアクリレート、ポリエチルアクリレート、ポリビ
ニルアルコール、ポリ酢酸ビニル等の重合体を無水条件
下でグラフト重合させたもの、ポリエーテルポリオール
中に前記のごときモノマーが溶解あるいは分散している
もの等がある。
The polyurethane foaming stock solution used in the present invention is a raw material mixture for producing HR foam, and is a composition consisting of polyisocyanate, polymer polyol, and the like. As the polyisocyanate, 2.4-tolylene diisocyanate, 65/35 tolylene diisocyanate, 80
/20 tolylene diisocyanate, 4,4'-cyphenylmethane diisocyanate, polymethylene polyphenyl isocyanate, N,N'-(4,4'-dimethyl-3
, 3'-diphenyl diisocyanate) uredione, 4
, 4,4''-trimethyl-3,3',3''-triisocyanate-2,4,6-triphenyl cyanurate, hydrogenated MD1, hydrogenated tolylene diisocyanate, and the like. Examples of polymer polyols include polyether polyols and polyester polyols, as well as acrylonitrile, methacrylonitrile, butadiene, styrene, vinyl chloride, vinylidene chloride, chlorobrene, methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, and vinyl acetate. Graft polymerization of monomers such as polyethylene, polyacrylonitrile, polymethacrylonitrile, polystyrene, polybutadiene, poly(butadiene-styrene), polyvinyl chloride, polychloride, etc., which have been prepolymerized with polyether polyol or polyester polyol. Polymers such as vinylidene, polychloroprene, polymethyl methacrylate, polymethyl acrylate, polyethyl acrylate, polyvinyl alcohol, and polyvinyl acetate are graft-polymerized under anhydrous conditions, and monomers such as those mentioned above are dissolved in polyether polyol or There are some things that are dispersed.

重合体−グラフトーポリオール組成物中のその重合体の
全含有量は約0.5〜約5の重量%であり、好ましくは
約5〜約30重量%である。前記ポリマーポリオールを
製造するのに好適なポリオールは、少なくともほぼ20
0の分子量を有し末端に水酸基を有するポリエステル、
ポリヒドロキシアルカン、ポリフエノール、ポリオキシ
アルキレンポリオール等であり、例えば末端に水酸基を
有するポリエステル、ポリヒドロキシアルカンのアルキ
レンオキシド付加物、トリアルカノールアミンのアルキ
レンオキシド付加物、アミンにアルキレンオキシドを付
加して得られるアルコール類、非還元性糖および糖誘導
体およびそのアルキレンオキシド付加物、リン酸または
ポリリン酸のアルキレンオキシド付加物、ポリフェノー
ルおよびそのアルキレンオキシド付加物、ポリテトラメ
チレングリコール等がある。
The total content of the polymer in the polymer-graft polyol composition is from about 0.5 to about 5% by weight, preferably from about 5 to about 30% by weight. Polyols suitable for making the polymer polyol include at least approximately 20
Polyester having a molecular weight of 0 and having a hydroxyl group at the end,
These include polyhydroxyalkanes, polyphenols, polyoxyalkylene polyols, etc., such as polyesters having a hydroxyl group at the end, alkylene oxide adducts of polyhydroxyalkanes, alkylene oxide adducts of trialkanolamines, and polyoxyalkylene oxides obtained by adding alkylene oxide to amines. Examples include alcohols, non-reducing sugars and sugar derivatives and their alkylene oxide adducts, phosphoric acid or polyphosphoric acid alkylene oxide adducts, polyphenols and their alkylene oxide adducts, polytetramethylene glycol, and the like.

この他に、触媒、発泡剤、気泡安定剤、必要により難燃
剤等も使用される。触媒としては、例えばトリメチルア
ミン、トリエチルアミン、Nーメチルモルホリン、N,
Nージメチルエタノールアミン、トリェチレンジアミン
等の第三級ァミン、トリアルキルホスフイン、ジアルキ
ルベンジルホスフィン等の第三級ホスフィン、塩化第二
鉄、塩化第二錫等の強酸の酸性金属塩、ジブチル錫ジア
セテート、ジブチル錫ジラウレート、ジブチル錫マレヱ
ート、スタンナスオクトェート等の有機錫化合物等があ
る。発泡剤としては、水、ジクロロジフルオロメタン(
R−12)、トリクロロモノフルオ。メタン(R−11
)、メチレンクロライド、1,1ージクロロ−1−フル
オロェタン等のハロゲン化アルカン等がある。これらの
ポリウレタン発泡原液を用いてワンショツト法、プレポ
リマー法等の任意の方法が用いられるが、通常ワンショ
ツト法が用いられる。
In addition, catalysts, blowing agents, foam stabilizers, flame retardants, etc. are also used if necessary. Examples of the catalyst include trimethylamine, triethylamine, N-methylmorpholine, N,
Tertiary amines such as N-dimethylethanolamine and triethylenediamine, tertiary phosphines such as trialkylphosphine and dialkylbenzylphosphine, acidic metal salts of strong acids such as ferric chloride and tin chloride, dibutyltin Examples include organic tin compounds such as diacetate, dibutyltin dilaurate, dibutyltin maleate, and stannous octoate. As a blowing agent, water, dichlorodifluoromethane (
R-12), trichloromonofluor. Methane (R-11
), methylene chloride, halogenated alkanes such as 1,1-dichloro-1-fluoroethane, and the like. Any method such as a one-shot method or a prepolymer method can be used using these polyurethane foaming stock solutions, but the one-shot method is usually used.

つぎに、自動車の座席用クッション材を例にとり、図面
を参照しながら本発明を詳細に説明する。すなわち、第
4図は、本発明方法を実施するための発泡成形型の概略
図であり、ほぼ中央部で縦割りにされて左右の成形型1
1,12よりなる縦型の成形型13の頂部14に比較的
大きなガス通路16を少なくとも1個所設け、この通路
15を覆うようにその周囲に、頂部付近にガス抜き用微
細孔16を備えた椀状体17を固着することにより前記
ガス通路15に蓮逸するガス貯蔵室18を設けてなるも
のである。この成形型13には、必要により原液注入孔
19が設けられている。しかして、前記ガス通路は、通
常直径約5〜3仇岬であり、好ましくは10〜2功ゆで
ある。また、ガス抜き用微細孔は、通常直径約1〜4肋
であり、好ましくは1.5〜2.5側である。この成形
型13に注入孔19よりHRフオーム用ポリウレタン発
泡原液を所定量注入し、栓(図示せず)をして成形型1
3を密閉する。
Next, the present invention will be described in detail with reference to the drawings, taking a cushioning material for a car seat as an example. That is, FIG. 4 is a schematic diagram of a foaming mold for carrying out the method of the present invention, which is vertically divided approximately at the center and forming molds 1 on the left and right.
At least one relatively large gas passage 16 is provided at the top 14 of a vertical mold 13 consisting of 1 and 12, and a gas venting fine hole 16 is provided around the top so as to cover this passage 15. A gas storage chamber 18 is provided which leaks into the gas passage 15 by fixing a bowl-shaped body 17. This mold 13 is provided with a stock solution injection hole 19 if necessary. Thus, the gas passageway usually has a diameter of about 5 to 3 mm, preferably about 10 to 2 mm. Further, the fine holes for degassing usually have a diameter of about 1 to 4 ribs, preferably on the 1.5 to 2.5 side. A predetermined amount of polyurethane foaming stock solution for HR foam is injected into the mold 13 through the injection hole 19, and a stopper (not shown) is inserted into the mold 13.
Seal 3.

ただし、この場合、ガス通路15およびガス抜き用微細
孔16は閉口したままである。ついで、この成形型13
を加熱炉に入れて、60〜150qo、好ましくは80
〜120qoの温度で3〜20分間、好ましくは8〜1
2分間加熱し、成形型の内圧のバランスを保ちながら発
泡を行なう。このときの内圧は、通常2〜15k9′め
である。発泡終了後、成形型3を分割して生成したHR
フオームの成形体20を得る。以上述べたように、本発
明に用いられる成形型13は、縦型構造であり、かつ該
成形型13の頂部14に比較的大きなガス通路15を設
け、さらにこの通路15を覆うようにその頂部にガス抜
き用微細孔16を備えた椀状体17を固着して空気貯蔵
室18が設けられているので、ガス通路15を1個所し
か設けなくても発泡中に発生したガスは上方のガス通路
15より空気貯蔵室18に入るのでガス抜きは楽にでき
、しかもガス通路15の径は大きいので、生成したフオ
ームのつまりは無くなり、型の掃除が容易にある。また
、空気貯蔵室18を設けたために成形型の内圧のバラン
スを保ちながら発泡成形することができる。まらに、ガ
ス通路15を通じ、フオームの一部が空気貯蔵室18に
侵入するが、製品を成形型13から取出した後に、その
部分だけ切除して仕上げればよいので、製品が簡単に得
られる。また、パーティングラィンを中央に取ることが
できるので、厚みの薄い物の成形発泡にも適する。した
がって、従来の型を使用したときのように、パーティン
グラインを中央に取っても発泡原液注入の際に成形型か
ら流出してしまう心配はない。また、本発明に用いられ
る成形型は縦型であるので、加熱発泡時の炉のスペース
は小さくてすむ。つぎに、実施例を挙げて本発明をさら
に詳細に説明する。
However, in this case, the gas passage 15 and the gas venting micropores 16 remain closed. Next, this mold 13
into a heating furnace to 60 to 150 qo, preferably 80 qo
3 to 20 minutes at a temperature of ~120 qo, preferably 8 to 1
Heat for 2 minutes and foam while maintaining the internal pressure balance of the mold. The internal pressure at this time is usually 2 to 15k9'. After foaming is completed, mold 3 is divided to generate HR.
A foam molded body 20 is obtained. As described above, the mold 13 used in the present invention has a vertical structure, and a relatively large gas passage 15 is provided at the top 14 of the mold 13, and the top part of the mold 13 is provided so as to cover the passage 15. Since the air storage chamber 18 is provided by fixing the bowl-shaped body 17 with the fine holes 16 for degassing, even if only one gas passage 15 is provided, the gas generated during foaming can be absorbed into the upper gas. Since the air enters the air storage chamber 18 from the passage 15, gas can be easily vented, and since the diameter of the gas passage 15 is large, there is no clogging of generated foam, and the mold can be easily cleaned. Further, since the air storage chamber 18 is provided, foam molding can be performed while maintaining the balance of the internal pressure of the mold. Occasionally, a part of the foam enters the air storage chamber 18 through the gas passage 15, but after taking out the product from the mold 13, only that part can be cut out and finished, so the product can be easily obtained. It will be done. In addition, since the parting line can be set at the center, it is suitable for molding and foaming thin objects. Therefore, unlike when using a conventional mold, there is no fear that the foaming solution will flow out of the mold even if the parting line is placed in the center during injection. Furthermore, since the mold used in the present invention is vertical, the space required for the furnace during heating and foaming is small. Next, the present invention will be explained in more detail by giving examples.

なお、下記実施例における部は、特にことわらない限り
重量部を意味する。実施例 1 第4図に示す装置(ガス通路15の直径15肌、ガス抜
き用微細孔16の直径2側である椀状体17を1個設け
たもの)を用いて、発泡原液注入孔19より、EP30
33(三井日曹ウレタン株式会社製ポリェーテル)6の
都、POP31−28(三井日曹ウレタン株式会社製ポ
リマーポリオール)4碇部、水3部、シリコン1部、ダ
ブコ3丸 Vを0.4部、カオライザーNo.1を0.
2部、トリェタノールアミン1部およびMDI/TD1
20/80をインデックス105に混合してなる液温2
5q0の発泡原液を45o0の前記タ装置(金型)に注
入した。
In addition, parts in the following examples mean parts by weight unless otherwise specified. Example 1 Using the device shown in FIG. 4 (having one bowl-shaped body 17 on the diameter 15 side of the gas passage 15 and the diameter 2 side of the gas venting micropores 16), the foaming stock solution injection hole 19 was used. From EP30
33 (polyether manufactured by Mitsui Nisso Urethane Co., Ltd.) 6 no Miyako, POP31-28 (polymer polyol manufactured by Mitsui Nisso Urethane Co., Ltd.) 4 parts of anchor, 3 parts of water, 1 part of silicone, 0.4 part of DABCO 3 round V , Kaolizer No. 1 to 0.
2 parts, 1 part trietanoamine and 1 part MDI/TD
Liquid temperature 2 made by mixing 20/80 with index 105
A 5q0 foaming stock solution was injected into the 45o0 machine (mold).

この注入孔19を密封したのち、加熱炉に入れ、120
q0で10分間加熱発泡させた。加熱終了後、金型を開
き自動車座席用クッション材を得た。得られたポリウレ
タン発泡体は、密度総k9/で、引張り強さ1.0k9
/地、伸び0率100%、引裂き強さ0.6k9/彬、
硬さ(ILD)12k9/314の、反駁強性60%、
圧縮永久歪4.0%であつた。実施例 2 実施例1と同様の装置を用いて、EP3033を70タ
部、POP31−28を3碇部、水2.7部シリコン1
.2郭、ダプコ34Vを0.3部、NIAXA−1(ァ
ミン系触媒)0.1部、ジェタノールアミン1部および
MDI/TD120/80をインデックス105に混合
してなる液温25qoの発泡原液を45℃の前記装置(
金O型)に注入した。
After sealing this injection hole 19, it is placed in a heating furnace and heated to 120
It was heated and foamed at q0 for 10 minutes. After heating, the mold was opened to obtain a cushioning material for automobile seats. The resulting polyurethane foam has a total density of k9/ and a tensile strength of 1.0k9
/ Ground, elongation 0% 100%, tear strength 0.6k9 / Akira,
Hardness (ILD) 12k9/314, refutation strength 60%,
The compression set was 4.0%. Example 2 Using the same apparatus as in Example 1, 70 parts of EP3033, 3 parts of POP31-28, 2.7 parts of water and 1 part of silicon were added.
.. A foaming stock solution with a liquid temperature of 25 qo was prepared by mixing 0.3 parts of DAPCO 34V, 0.1 part of NIAXA-1 (amine catalyst), 1 part of jetanolamine, and MDI/TD120/80 with index 105. Said apparatus at 45°C (
It was injected into gold O type).

この注入孔19を密封したのち、加熱炉に入れ、8ぴ○
で8分間加熱発泡させた。加熱終了後、金型を開き自動
車座席用クッション材を得た。得られたポリウレタン発
泡体は、密度42k9/で、引張り強さ1.2k9/地
、伸び率120%、引裂き強さ0.6k9′の、硬さ(
山D)9.5k9′地、反綾弾性63%、圧縮永久歪3
.5%であった。
After sealing this injection hole 19, put it in a heating furnace and
The mixture was heated and foamed for 8 minutes. After heating, the mold was opened to obtain a cushioning material for automobile seats. The resulting polyurethane foam had a density of 42k9/2, a tensile strength of 1.2k9/2, an elongation of 120%, a tear strength of 0.6k9', and a hardness (
Mountain D) 9.5k9' ground, anti-twill elasticity 63%, compression set 3
.. It was 5%.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のHRフオーム成形用型の概略を示す断面
図、第2図は従釆の型のガス抜き用微細孔を示す断面図
、第3図は従来の別の型の概略を示す断面図であり、ま
た第4図は本発明に用し、られるHRフオーム成形用型
の概略を示す断面図である。 11,12・・・左右型、13・・・成形型、14・・
・成形型頂部、15・・・ガス通路、16・・・ガス抜
き用微細孔、17・・・椀状体、18・・・空気貯蔵室
、19・・・発泡原液注入孔、20・・・発泡体。 第1図 第2図 第3図 第4図
Fig. 1 is a cross-sectional view schematically showing a conventional HR foam molding die, Fig. 2 is a cross-sectional view showing micropores for gas venting in a subordinate mold, and Fig. 3 is a schematic diagram of another conventional mold. FIG. 4 is a cross-sectional view schematically showing a mold for molding HR foam used in the present invention. 11, 12... Left and right molds, 13... Molding molds, 14...
・Top of mold, 15... Gas passage, 16... Fine holes for degassing, 17... Bowl-shaped body, 18... Air storage chamber, 19... Foaming solution injection hole, 20...・Foam. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】 1 左右の成形型よりなる縦型成形型の頂部に比較的大
きなガス通路を設け、該通路を覆うようにその周囲に頂
部付近にガス抜き用微細孔を備えた椀状体を固着して前
記ガス通路に連通するガス貯蔵室を設けてなる前記成形
型にポリウレタン発泡原液を供給し、該成形型内で加熱
発泡させることを特徴とする高弾性ポリウレタンフオー
ム成形物の製造方法。 2 発泡成形は60〜150℃の温度で行なわれる特許
請求の範囲第1項に記載の方法。 3 ガス貯蔵室は前記成形型の頂部に1個設けられてな
る特許請求の範囲第1項または第2項に記載の方法。
[Scope of Claims] 1. A vertical mold consisting of left and right molds, with a relatively large gas passage provided at the top, and a bowl-shaped gas vent provided around the gas passage near the top so as to cover the passage. Production of a highly elastic polyurethane foam molded product, characterized in that a polyurethane foaming stock solution is supplied to the mold, which is fixed to the mold and has a gas storage chamber communicating with the gas passage, and heated and foamed in the mold. Method. 2. The method according to claim 1, wherein the foam molding is carried out at a temperature of 60 to 150°C. 3. The method according to claim 1 or 2, wherein one gas storage chamber is provided at the top of the mold.
JP53089996A 1978-07-25 1978-07-25 Method for manufacturing highly elastic polyurethane foam molded products Expired JPS6016896B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53089996A JPS6016896B2 (en) 1978-07-25 1978-07-25 Method for manufacturing highly elastic polyurethane foam molded products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53089996A JPS6016896B2 (en) 1978-07-25 1978-07-25 Method for manufacturing highly elastic polyurethane foam molded products

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP58143716A Division JPS6017690B2 (en) 1983-08-08 1983-08-08 Manufacturing equipment for highly elastic polyurethane foam moldings

Publications (2)

Publication Number Publication Date
JPS5517511A JPS5517511A (en) 1980-02-07
JPS6016896B2 true JPS6016896B2 (en) 1985-04-30

Family

ID=13986207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53089996A Expired JPS6016896B2 (en) 1978-07-25 1978-07-25 Method for manufacturing highly elastic polyurethane foam molded products

Country Status (1)

Country Link
JP (1) JPS6016896B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5812735A (en) * 1981-07-15 1983-01-24 Ikeda Bussan Co Ltd Manufacture of head rest
JPS5872017U (en) * 1981-11-07 1983-05-16 日立化成工業株式会社 Low pressure molding mold
US4946363A (en) * 1988-07-20 1990-08-07 Union Carbide Chemicals And Plastics Company Inc. Mold and mold vent

Also Published As

Publication number Publication date
JPS5517511A (en) 1980-02-07

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