JIS K Test Methods for Flexible Polyurethane Foam. JIS K Flexible cellular polymeric materials – Determination of physical properties – Part 4: Compression set and fatigue characteristics. JIS K Flexible cellular polymeric materials – Determination of physical properties – Part 1: General rules.
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De Gruyter – Sciendo.
JIS K 6400 Foam Dynamic Roller Shear Compression Fatigue Lab Test Machine
The reaction rate of the compound having OH groups are generally primary OH groups, water, high in the order of secondary OH groups primary OH group is high. On the other hand, the vibration-absorbing polyurethane foam is generally due to the breathability of the polyurethane foam. The present invention pertains to a polyurethane foam which is obtained by foaming and molding a foamable raw liquid that comprises a polyol ingredient and a polyisocyanate ingredient.
On the other hand, by including a specific amount of a specific polyol in the polyol component, it is possible to finely bubbles polyurethane foam to be molded, is considered to easily closed jiss are formed.
JIS- KK This tester is used to repeatedly test compression residual strain of polyurethane foam and latex foam soft material according to the constant displacement method.
On the other hand, the seat pad for a vehicle, to determine the comfort of such comfortable feeling, is also high resilience requirements. The new tester meets the standards specified in the JIS K Hardness Test A and B requirements, in addition to those of conventional hardness and jks tests standards.
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The content of the specific polyol in the polyol component is preferably 65 to parts by mass with respect to the polyol component parts by weight, more preferably parts by weight, more preferably 65 to 75 parts by weight. Target value of the resonance frequency is less than 4 Hz, a target value of the vibration magnification is 2.
Resilience polyurethane foam has a weight average molecular weight of the various polyol contained in the polyol component, depending on the length or the like of k640 molecular chain, for example, it tends to be higher the impact resilience is high molecular weight. Moldability, from the viewpoint of reactivity, block of EO units is preferably in the molecular end.
Particularly suitable as a vehicle seat pad height of the vehicle interior, such as hybrid cars are limited. Available for data communication with PC by Ethernet connection.
We can comply with your demand for special sequence with addition and improvement of outer control PC software and program for inside part of tester.
According to the present invention, it is possible to provide a kk6400 foam and a seat pad to achieve both high resilience and high vibration absorption.
Therefore, the high resilience and high vibration absorption was characteristic of antinomy. Flexible polyurethane foam, process for its production, and seat for automobile using the flexible polyurethane foam.
The entire density overall density The density of the polyurethane foam, JIS K form overall apparent density was measured according to unit: Silicone surfactants for the production of open cell polyurethane flexible foams. The resulting polyurethane foam was evaluated by the following method. Particular polyol is not particularly limited as long as it has the above molecular weight properties, the ethylene oxide sometimes referred to as EO and polyether polyols obtained by ring-opening polymerization of propylene oxide sometimes referred to as PO it is preferable that.
Specific polyol used in forming the polyurethane foams of the present invention are relatively high molecular weight, since the weight average molecular weight per functional group is large, is considered to be high impact resilience can be obtained.
Urethane Foam Tester
Specifically, tetramethyl hexamethylene diamine, pentamethyldiethylenetriamine, dimethylcyclohexylamine, bis – dimethylaminoethyl ether, tetramethyl propylene diamine, trimethyl aminoethyl piperazine, tetramethylethylenediamine, dimethylbenzylamine, methylmorpholine, ethylmorpholine, triethylenediamine, amine catalyst and the like diethanolamine, may be mentioned stannous octoate, tin catalysts such as dibutyltin dilaurate.
Foaming stock solution, polyurethane foam according to claim 1 comprising a dimethylpolysiloxane. Seat pad of the present invention, in the foam molding of a polyurethane foam, as the mold, can be obtained by using a mold having a shape jie a desired seat pad.
Seat pad k66400 using the polyurethane foam according to any one of claims The curing time was seconds. Flexible polyurethane foam, process for its production, and seat for automobile employing it.
Then, by foaming the foaming stock solution in the mold and cured. Z, Z, Z This tester is used to evaluate the compressive strength k400 ring shaped paper board according to the ring crush method. By polyol component comprises a polymer polyol, water can be prevented from deterioration of impact resilience and hardness when used as blowing agents. Water from to generate carbon dioxide gas reacts with the polyisocyanate component, which acts as a blowing agent.
Specific polyol, the molecular interior is a block consisting of PO units, and more preferably a molecular end is a block consisting of EO units. In addition, the density of the polyurethane foam, refers to the overall density when measured in accordance with JIS K A weight average molecular weight of 4, to 10, the number of functional groups having a k400 average molecular weight per functional group is 1, to 4, of the polyol, one of claims 1 to 6, which is a 3 or 4 1 polyurethane foam according to item.
Polyurethane foams, depending on k64000 application, the mechanical properties, various properties such as heat insulation and vibration-absorbing properties are required.
Kind code of ref document: Wood’s structural use as load bearing uis in various construction applications requires stringent flexural testing. And finer cell diameter, cell by giving viscous effects associated with out of the air, the higher the vibration absorption of the polyurethane foam. A weight average molecular weight of 4, to 10, a weight average molecular weight per functional group is 1, to 4, of the polyol, according to any one of claims 1 to 5, which is a polyether polyol polyurethane foam.
This tester can also be used to check the strength of….