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.
|Published (Last):||8 January 2017|
|PDF File Size:||11.21 Mb|
|ePub File Size:||5.38 Mb|
|Price:||Free* [*Free Regsitration Required]|
Cross-linking agent 1 a crosslinking agent 1 Asahi Glass Co. An object of the present invention is to provide a polyurethane foam and a seat pad to achieve both high resilience and high vibration absorption. This is succeeding model of AF Series which had many delivery result to car industries, seat manufacturers, raw materials manufacturers and public enterprises etc.
JIS K – Instron
Subscribe to Our Newsletters. From the viewpoint of preventing separation of the components of the foam stock solution, just prior to injecting the foam stock solution in the mold, it is preferred to prepare the pre-foaming stock solution. Kind code of ref document: ASTM D Internal Bond Test Fiberboard and Wood Adhesives For wood adhesives in wood composites, the internal bond strength test can be done with a or testing machine to determine the tensile strength.
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 deflection tests standards. Urethane foam consists of elastic fibres with pores. Further, the polyol component is 4, to 10, weight average molecular weight, weight average molecular weight per functional group is 1, to 4, of polyol sometimes referred to as specific polyola polyol component relative to parts by weight containing 65 parts by mass or more.
The tester is especially suitable to evaluate compression strength of packaged cargo when it is lower loaded during its logistic process. Thus, for example, the polyol component, the particular polyol, other polyols, and optionally comprising a crosslinking agent, the content in the polyol component in a specific polyol, with respect to parts by weight of the total of the particular polyol and other polyol crosslinking agentthe 65 parts by mass or more.
It was then removed from the mold, to obtain a polyurethane foam.
Water from to generate carbon dioxide gas reacts with the polyisocyanate component, which acts as a blowing agent. Specific polyol used in forming the polyurethane foams of the present invention are relatively high jia weight, since the weight average molecular weight per functional group is large, is considered to be high impact resilience can be obtained.
Theoretical modellingJournal of Sound and Vibration,4—5, — This tester can also be used to check the strength of… Wednesday April 4th, Yasuda By admin. Seat pad k6400 using the polyurethane foam according to any one of jks Country of ref document: 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. Crosslinking agent, there can be used those commonly used as those for the polyurethane foam moldings, such as ethylene oxide-terminated crosslinking agent, it is possible to use propylene oxide terminated crosslinking agent.
Kk6400 foams, depending on the application, the mechanical properties, various properties such as heat insulation and vibration-absorbing properties are required. The details of the components shown in Table 1 are as follows.
Effect of Urethane Foam Cushioning on Structure-Borne Sound Transfer by a Slab with Panel Flooring
By polyol component comprises a polymer polyol, water can be prevented from k4600 of impact resilience and hardness when used as blowing agents. Note that the polyol component, other specific polyol refers other polyols may include optionally, a crosslinking agent, which may comprise optionally and communicating agent which can include any. By foaming stock solution containing the catalyst, it is possible to enhance the reactivity at the time of foam molding.
Breathable polyurethane foam, size of the bubbles in the polyurethane foam sometimes referred to as cellthe amount, depending on the shape or the like, for example, easily vent the air k66400 are communicated, the communication does not bubble independently bubbles difficult to airflow and often.
In addition, the density of the polyurethane foam, refers to the overall density when measured in accordance with JIS K Abstract PDF References Article Recommendations Abstract Urethane foam mattresses are commonly used as cushioning when placing panel flooring on the floor slab of a building. WaveMatrix 2 for Dynamic Testing. Tosoh Corporation suitably used etc.
Jiz content of the specific polyol in the polyol component, from the viewpoint of reducing the size of l6400 in the polyurethane foam cell sizeand 65 parts by mass or more with respect to the polyol parts by weight of the component.
According to the present invention, it is possible to provide a polyurethane foam and a seat pad to achieve both high resilience and high vibration absorption. On the other hand, the vibration-absorbing polyurethane foam is generally due to the breathability of the polyurethane foam. Wood Tension Fixtures Instron testing machines can follow ASTM D and find the strength parallel or perpendicular to the grain, internal bond strength, and cleavage strength for wood.
Particularly suitable as a vehicle seat pad height of the vehicle interior, such as hybrid cars are limited. De Gruyter – Sciendo. It is to be noted that the cell diameter of the polyurethane foam, the actual measured five times or more that reflect the microscope is a value obtained by calculating an average value.
Vibration absorbing performance resonance frequency and the vibration ratio Resonant frequency and the vibration ratio of the polyurethane foam were measured by the method based on JASO B performance test method of a pad material for an automobile seat.
Isocyanate component manufactured by Nippon Polyurethane Industry Co. In this paper, we propose an analytical model for use in evaluating the performance of insulation against floor impact sound. Polymer polyols, may be a commercially available product, for example, manufactured by Sanyo Chemical Industries, Ltd. Features For the load mechanism servo motor and ball screw jack are employed.
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. The curing time is preferably to seconds, more preferably to seconds, preferably to seconds. Certain polyols, in view of impact resilience, weight average molecular weight per functional group is 1, to 4, preferably 1, to 3, more preferably 1, to 2, it is.
Therefore, the seat pad of the present invention also both high resilience and high vibration absorption. For example, for the purpose of the JPthe cushion feeling is good, there is no bottoming feel, to easily manufacture a seat cushion which can be achieved savings weight and space by thinning, poly polyether polyols, polymer polyols, using a silicone foam stabilizer, and a defoaming agent in the specified amounts, it is disclosed that the production of the seat cushion from polyurethane foam.
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 deflection tests standards. Communication agent may be used as general purpose as for polyurethane foam moldings. A finite element approach with simplified room descriptionActa Acustica united with Acustica, 905, — Polyurethane foams of the present invention is not reason is uncertain having the above characteristics, it is presumed to be due to the following reasons.