Heat-storing composition, and heat-storing fiber, sheet and film each made of the same
A composition and heat storage technology, applied in the direction of single-component synthetic polymer rayon, chemical characteristics of fibers, materials for heat exchange, etc., can solve problems such as unstable manufacturing, and reduce broken filaments, blur or thickness variation. Effect
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preparation example Construction
[0065] The production methods of the temperature regulators (A) and (B) are not particularly limited.
[0066] For example, the temperature regulator (A) can be produced by polymerizing a monomer that can form a crystalline unit or a monomer that can form a crystalline unit and a hydrophilic unit.
[0067] The aforementioned poly higher alpha olefins are preferably synthesized using a homogeneous catalyst called a metallocene catalyst. Metallocene catalysts are described in, for example, International Publication WO03 / 070790. Among these, C2 symmetric and C1 symmetric transition metal compounds that can synthesize isotactic polymers are particularly preferably used. Specifically, a catalyst containing the following (a) and (b) is preferable.
[0068] (a) Transition metal compound of two cross-linking type (two bridging type)
[0069] (b): a compound selected from (b-1) a compound capable of forming an ionic complex by reacting with the transition metal compound of the above...
Embodiment 1
[0131] (1) Preparation of heat storage composition
[0132] In extrusion granulator (manufactured by Ikegai Co.), drop into 1-hexadecene-1-octadecene copolymer [(C 16 h 32 ) m -(C 18 h 36 ) n ] (Mw=8500) 30% by mass and 70% by mass of polypropylene (produced by Prime Polymer Co., Ltd., Y2005GP) as a thermoplastic resin were melt-kneaded to obtain a granular composition. The granulation temperature at this time was 280 degreeC.
[0133] In this composition, observation of the dispersed state of the temperature regulator with a transmission electron microscope (TEM) revealed that the average particle diameter of the temperature regulator was 0.3 μm.
[0134] (2) Spinnability evaluation
[0135] The composition prepared in (1) above was melted with a kneading extruder (KCK-80, manufactured by Keishi Engineering Engineering Co., Ltd.), and extruded into a strand form from a die. Extrude at 240°C, and flow the wire vertically from a height of 2m to the bottom. Observe whet...
Embodiment 2～6 comparative example 1
[0146] Except having changed the molecular weight Mw of a temperature regulator as shown in Table 1, it carried out similarly to Example 1, and produced and evaluated the heat storage composition. The results are shown in Table 1. Table 2 shows the physical properties of the temperature regulators used in each example and the average particle diameter in the granular composition.
[0147] [Table 1]
[0148]
[0149] [Table 2]
[0150] Molecular weight (Mw) Melting point (°C) Latent heat (J / g) Average particle size (μm) Example 1 8500 27～29 70 0.3 Example 2 10000 27～29 70 0.5 Example 3 15000 27～29 70 0.75 Example 4 20000 27～29 70 1.04 Example 5 40000 27～29 70 5.2 Example 6 65000 27～29 70 6.1 Comparative example 1 100000 27～29 70 8.2
[0151] The evaluation of the temperature regulator was carried out by the following method.
[0152] (1) Melting point, latent heat
[0153] Using a differe...
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