PROBLEM TO BE SOLVED: To provide a method for producing a flexible urethane foam, even in the case a remolding time is reduced, appearance defects such as cell roughening caused by insufficient liquid flow are not generated.SOLUTION: Provided is a method for producing a flexible urethane foam by reacting an active hydrogen component (A) and organic isocyanate (B) in the presence of a foaming agent (C), a catalyst (D) and a foam regulation agent (E), satisfying the conditions of (1) to (6): the condition (1) that the cream time of free foaming is 6 s or lower; the condition (2) that the gel time of the free foaming is 12 s or lower; the condition (3) that the time (t1) reaching the height of 80% at the maximum in a rise height is 15 s or lower; the condition (4) that the rise height maximum arrival time (rise time: t2) is 24 s or lower; the condition (5) that the value of (t2)-(t1) is 6 s or lower; and the condition (6) that the settling rate of the obtained foam is 1% or higher and/or its permeability is 0.18 ft/min or higher.SELECTED DRAWING: None
【課題】 脱型時間を短縮した場合でも、液流れ不足によるセル荒れ等の外観不良の発生しない軟質ウレタンフォームの製造方法を得る。【解決手段】 活性水素成分(A)と有機イソシアネート(B)とを、発泡剤(C)、触媒(D)および整泡剤(E)の存在下に反応させて軟質ウレタンフォームを製造する方法であって、下記(1)〜(6)の条件を満たす軟質ウレタンフォームの製造方法。(1)フリー発泡のクリームタイムが6秒以下。(2)フリー発泡のゲルタイムが12秒以下。(3)ライズ高さ最大時の80%の高さに到達する時間(t1)が15秒以下。(4)ライズ高さ最大到達時間(ライズタイム:t2)が24秒以下。(5)(t2)−(t1)が6秒以下。(6)得られるフォームの、セトリング率が1%以上、および/または、通気度が0.18ft3/分以上。【選択図】 なし
METHOD FOR PRODUCING FLEXIBLE URETHANE FOAM
軟質ウレタンフォームの製造方法
2016-10-06
Patent
Electronic Resource
Japanese
IPC: | C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / A47C Stühle , CHAIRS / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B68G Verfahren, Ausrüstung oder Maschinen zum Verwenden in der Polsterei , METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING |
Dynamic response of flexible urethane foam after stress- relaxation
Automotive engineering | 1976
|Dynamic Response of Flexible Urethane Foam after Stress-Relaxation
SAE Technical Papers | 1976
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