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Injection-molded object

一种注射模塑、成型体的技术，应用在运输和包装、薄料处理等方向，能够解决机械强度下降、高阻燃性能、不能满足等问题

Inactive Publication Date: 2006-04-26
SONY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese Patent Laid-Open No. 8-252823 discloses that in order to impart flame retardancy to biodegradable plastics, aluminum hydroxide or magnesium hydroxide is added, but in order to obtain sufficient flame retardancy, a large amount of magnesium hydroxide must be added to cause mechanical strength. decline
[0006] In addition, Japanese Patent Application Laid-Open No. 2000-319532 discloses a flame-retardant resin composition that uses silicon oxide as a non-halogen and non-phosphorus flame retardant to dissolve it in the resin, but because it cannot meet the high flame retardant Inflammability, so it cannot be used in household appliances, OA equipment, etc., and the mechanical and physical properties are not sufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] "Nature Works 6000D" (L-lactic acid / D-lactic acid = 95.8 / 4.2, weight average molecular weight 160,000) manufactured by Rikido Dou Co., Ltd. was used as the lactic acid resin, and "Pyrolaser-HG" manufactured by Ishizuka Glass Co., Ltd. was used. "(Aluminum hydroxide surface-treated with stearic acid, silane coupling agent and ammonium nitrate, w-Na 2O=0.05) as metal hydroxide. "Nature Works 6000D" and "Pyrolaser-HG" were dry-blended at a mass ratio of 100:25, and dried at 60°C for 12 hours with a vacuum dryer. The moisture content of this mixture was measured at 180° C. with a Karl Fischer moisture meter, and it was confirmed that the moisture content was 0.5% or less. Then, the mixture was blended at 180° C. using a 40 mmφ small co-direction twin-screw extruder manufactured by Mitsubishi Heavy Industries, Ltd. to form pellets. The obtained pellets were dried at 60° C. for 12 hours using a vacuum dryer. The moisture content was measured at 180° C. with a Karl Fischer ...

Embodiment 2

[0104] Except for the "BW103ST" manufactured by Nippon Light Metal Co., Ltd. (aluminum hydroxide surface-treated with a silane coupling agent, w-Na 2 O=0.05) As the metal hydroxide in Example 1, except that the mass ratio of "NatureWorks 6000D" and "BW103ST" was changed to 100:10, the same operation as in Example 1 was made into injection molding body.

[0105] The obtained injection molded article was evaluated in the same manner as in Example 1. The results are shown in Table 2.

Embodiment 3

[0107] Except changing the mass ratio of the compounding quantity of "Nature Works 6000D" and "BW103ST" in Example 2 to 100:25, it carried out similarly to Example 2, and produced the injection molding molding.

[0108] The obtained injection molded article was evaluated in the same manner as in Example 1. The results are shown in Table 2.

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Abstract

The present invention provides injection molded object having biodegradability and excellent flame retardance and mechanical strength. The injection molded object includes a lactic acid based resin; and a metal hydroxide in a ratio of 5 to 40 mass parts per 100 mass parts of the lactic acid based resin. The metal hydroxide is surface-treated, and Na2O (w-Na2O) present on a surface of grains of the metal hydroxide is 0.1 mass% or less based on the total mass of the metal hydroxide. Preferably, the injection molded object contains an aliphatic polyester other than the lactic acid based resin or an aromatic-aliphatic polyester in a ratio of 20 to 80 mass parts per 100 mass parts of the lactic acid based resin.

Description

technical field [0001] The present invention relates to an injection molded article having biodegradability and flame retardancy. Background technique [0002] Some people point out that the existing plastics exist stably in the natural environment for a long time and have a small volumetric proportion, which shortens the lifespan of the land for waste burial, or damages the natural landscape and the living environment of wild animals and plants. Therefore, it is necessary to seek materials that can degrade and disappear at any time in the natural environment and do not have a bad impact on the natural environment. Currently attracting attention as such materials are biodegradable resins. Biodegradable resins are known to be biodegraded by hydrolysis or microbial action in soil and water, and finally become harmless degradation products. In addition, it is known that biodegradable resins treated with organic fertilizers (composted) are easy to discard. [0003] Examples o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/00C08J5/00B29B7/88B29K67/00C08K3/00C08K3/22C08K9/02C08L67/02C08L101/16
CPCY10T428/2998C08L67/04C08L67/02C08K3/0033C08K3/22Y10T428/2991C08K9/00C08K3/013C08L2666/18B29C45/00
Inventor 大桥晓弘田中一也加藤幸男高木润
Owner SONY CORP
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