JP2004149692A5

JP2004149692A5 -

Info

Publication number: JP2004149692A5
Application number: JP2002317450A
Authority: JP
Filing date: 2002-10-31
Publication date: 2005-06-09
Anticipated expiration: 2022-10-31

Description

（耐折回数）
厚さ約２５０μｍのシートを用い、ＭＩＴ耐揉疲労試験機（（株）東洋精機製作所）により、ＪＩＳＰ−８１１５に基づいて測定した。尚、耐折強さは耐折回数の常用対数である。 (Number of folds)
Using a sheet with a thickness of about 250 μm, the sheet was measured according to JIS P-8115 using a MIT corrosion resistant fatigue tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.). The folding resistance is a common logarithm of the number of foldings.

製造例２〜１１（乳酸系ポリエステルＰ−２〜Ｐ−１１の合成）
ジカルボン酸、ジオール、ラクタイドの種類、添加量を表１のように変えた以外は、製造例１と同様にして、乳酸系ポリエステル（Ｐ−２〜Ｐ−１１）を合成した。
各ポリマーの数平均分子量（Ｍｎ）、重量平均分子量（Ｍｗ）、ガラス転移点（Ｔｇ）についても表１〜３に示す。 Production Examples 2 to 11 (Synthesis of Lactic Acid-Based Polyester P-2 to P-11)
A lactic acid-based polyester (P-2 to P-11) was synthesized in the same manner as in Production Example 1 except that the kind of dicarboxylic acid, diol, and lactide and the addition amount thereof were changed as shown in Table 1.
The number average molecular weight (Mn), weight average molecular weight (Mw), and glass transition point (Tg) of each polymer are also shown in Tables 1 to 3.

一方、比較例においては、乳酸系ポリエステル及び透明核剤を添加しない場合は耐折回数は０回と堅くて脆く、また耐熱性が低い成形品しか得られない（比較例１）。また、乳酸系ポリエステルを添加しない場合は、耐熱性のある成形品が得られるが、耐折回数は３回と、樹脂の脆さは改善されていない（比較例２）。さらに、透明結晶核剤を添加しない場合は、耐折回数は５００回以上と脆さは改善されているが、耐熱性のある成形品は得られない（比較例３）。 On the other hand, in the comparative example, when the lactic acid-based polyester and the transparent nucleating agent are not added, only a molded product having a low number of folds, which is hard and brittle with zero folding resistance, is obtained (Comparative Example 1). In addition, when a lactic acid-based polyester is not added, a heat-resistant molded article is obtained, but the number of times of folding is three, and the brittleness of the resin is not improved (Comparative Example 2). Furthermore, when the transparent crystal nucleating agent is not added, although the number of times of folding is improved to 500 or more and the brittleness is improved, a heat-resistant molded article can not be obtained (Comparative Example 3).

Claims

Aliphatic carboxylic acid amide with respect to 100 parts by weight of a polymer component consisting of a lactic acid-based polyester having a lactic acid component (I) and a polyester component (II) in a weight ratio in the range of 10:90 to 90:10; A polylactic acid-based resin composition comprising 0.1 to 5 parts by weight of at least one selected from the group consisting of aliphatic carboxylic acid salts, aliphatic alcohols and aliphatic carboxylic acid esters.

The polylactic acid-based resin composition according to claim 1, wherein the content of polylactic acid in the polymer component is at most 99% by weight.

A reaction product obtained by reacting a lactic acid-based polyester with a lactic acid component (I) and a polyester component (II) consisting of a dicarboxylic acid (IIa) and a diol (IIb) in a weight ratio of 10:90 to 90:10. The polylactic acid-based resin composition according to claim 1 or 2.

At least one selected from the compound group consisting of aliphatic carboxylic acid amide, aliphatic carboxylic acid salt, aliphatic alcohol and aliphatic carboxylic acid ester is palmitic acid amide, stearic acid amide, erucic acid amide, behenic acid amide, ricinol Acid amide, hydroxystearic acid amide, N-oleyl palmitic acid amide, N-stearyl erucic acid amide, ethylene bis capric acid amide, ethylene bis lauric acid amide, ethylene bis erucic acid amide, ethylene bis oleic acid amide, m-xylylene Bisstearic acid amide, m-xylylene bis-12-hydroxystearic acid amide, sodium stearate, potassium stearate, zinc stearate, calcium montanate, ethylene glycol distearate and stearyla Call, polylactic acid resin composition according to any one of claims 1 to 3 is at least one selected from the group consisting of.

The ratio of aliphatic dicarboxylic acid to the total amount of dicarboxylic acid (IIa) is in the range of 30 to 100% by weight, and the ratio of aliphatic diol to the total amount of diol (IIb) in the range of 40 to 100% by weight The polylactic acid-based resin composition according to any one of claims 1 to 4.

When the haze value of a 0.3 mm-thick molded article is 15% or less and the temperature is lowered at a rate of 200 ° C. to 10 ° C./min with a differential scanning calorimeter, an exothermic peak accompanying crystallization of the resin is measured The polylactic acid-based resin composition according to any one of claims 1 to 5, characterized in that

A haze value of a molded article having a thickness of 0.3 mm comprising a polylactic acid-based resin composition according to any one of claims 1 to 20 is 20% or less, and a differential scanning calorimeter from 0 ° C to a melting point of 10 ° C / A molded article characterized by having a calorific value accompanying crystallization of a resin of 15 J / g or less, which is measured when the temperature is raised at a speed of a minute.

The molded article according to claim 7, which is in the form of a sheet.