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Polyester resin foaming particle and its molding body

An expanded particle and polyester resin technology, which is applied in the field of polyester resin expanded particles and their molded bodies, can solve the problems of poor secondary foamability and reduced surface smoothness of the molded body.

Inactive Publication Date: 2005-06-22
JSP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if you want to obtain a density of 0.012 ~ 0.06g / cm 3 In the case of a molded product of expanded particles, there is a problem that the surface smoothness of the molded product is reduced due to poor secondary expandability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3、 comparative example 1、2

[0093] An aliphatic polyester resin ("Biono-レ#1001" manufactured by Showa Polymer Co., Ltd., with a melting point of 112°C and a Vicat softening temperature of 109°C and an MFR of (190°C) mainly composed of 1,4-butanediol and succinic acid was used. , load 21.18N) 1.5g / 10min, density 1.26g / cm 3 ) and talc powder ("Hifira-#12" manufactured by Matsumura Sangyo Co., Ltd., with an average particle size of 2.5 μm) as a foam regulator, and a phthalocyanine green pigment were melted and kneaded in an extruder, and then extruded into a monofilament , and then cut the monofilament to obtain resin particles with a diameter of about 1.5 mm, a length of about 1.6 mm, and an average weight of 2 or 3 mg. Phthalocyanine green pigments are added as a matrix compound, and added on the premise that the addition amount is 20ppm. In addition, talcum powder is added as a matrix compound, and its content is 1000ppm or 3000ppm (in comparative example 1, no talcum powder is added. In addition, in co...

Embodiment 4～11

[0100] In a unidirectional extruder, a fatty acid polyester resin (Biono-レ#1001) mainly composed of 1,4-butanediol and succinic acid, fatty acid additives such as fatty acid metal salts shown in Table 3, and After melt-kneading the phthalocyanine green pigment of the agent, it was extruded into a monofilament, and then the monofilament was cut to obtain resin particles with a diameter of about 1.5 mm, a length of about 1.6 mm, and an average weight of 3 mg. The fatty acid additives have the content shown in Table 3, are uniformly dispersed in the matrix material resin, and are added to the matrix material resin as a matrix compound. In addition, the phthalocyanine green pigment was added as a master compound so that the content in the matrix resin was 20 ppm.

[0101] Next, 100 parts by weight of the resin particles, 300 parts by weight of water, 0.5 parts by weight of aluminum oxide, 0.004 parts by weight of sodium dodecylbenzenesulfonate, and 1.5 parts by weight of Nipex wer...

Embodiment 12～14

[0105] As an organic peroxide, 1.5 parts by weight of Nippa-FF was changed to 0.75 parts by weight of water-diluted benzoyl peroxide (Nipa-BW manufactured by NOF Co., Ltd., benzoyl peroxide purity 75%) , except for the conditions shown in Tables 3 and 4, expanded particles and their molded bodies were obtained in the same manner as in Example 4. The physical properties of the obtained expanded particles and their molded products are shown in Tables 3 and 4 together. In the examples, the gel fractions of the expanded particles and the expanded particles after two-step foaming, and their molded products are almost the same.

[0106] In Examples 7, 8 and 14, the amine-based surfactant shown in the column of additives in Table 3 is a mixture of N,N-bis(2-hydroxyethyl)alkylamine and higher alcohol (Lion Co., Ltd. Made "A-Mostat 515").

[0107]

[0108] Internal pressure

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PUM

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Abstract

A polyester-based resin foamed particle with biodegradability and excellent practicability, characterized in that the base material resin is mainly composed of a polyester-based resin containing at least 35 mol% of aliphatic ester components in the main chain Composition, the apparent density is 0.015-0.09g / cm3, the average weight of each expanded particle is 1mg-less than 5mg, the average bubble film thickness of the expanded particle is 0.2-5μm, and the gel fraction is not less than 5% by weight . The expanded particle molded product obtained by using the expanded polyester resin particles has excellent dimensional stability and appearance, and has a high closed cell ratio, so it is also excellent in mechanical strength such as compression creep and cushioning properties, and is suitable for use as cushioning materials and packaging. Materials, various containers, etc.

Description

technical field [0001] The present invention relates to polyester-based resin expanded particles having biodegradability and excellent practicality, and a molded article thereof. Background technique [0002] In recent years, plastic foams characterized by light weight, cushioning properties, heat insulation, moldability, etc. are convenient objects, and are mainly used in packaging containers, cushioning materials, and the like in large quantities. On the other hand, plastics usually do not decompose, or take a long time to decompose. If such plastics are left in nature, they may cause natural environmental pollution such as garbage scattering, and become a social problem. Therefore, biodegradable plastics that are decomposed and processed in the natural environment are being studied, and some aliphatic polyesters, mixtures of starch and polyvinyl alcohol, etc. have been commercialized so far. However, most of the foams of these biodegradable resins are extruded foams, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/00C08L67/00
Inventor 筱原充常盘知生坂口正和所寿男佐佐木秀浩
Owner JSP CORP
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