Biodegradable polyester resin composition, and molded body, foamed body and molded container obtained from the biodegradable polyester resin composition
A biodegradable, polyester resin technology, applied in rigid containers, containers, transportation and packaging, etc., can solve the problems of difficult molding, unproposed operation method, and brittleness, etc., and achieve excellent foamability and heat resistance excellent effect
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Embodiment 1～3
[0187] Using a biaxial extrusion kneader (PCM-45 manufactured by Ikegai Co., Ltd., melting temperature-extrusion head temperature: 200°C, screw rotation speed 150rpm, discharge rate 25kg / h), as a biodegradable polyester resin ( To 100 parts by mass of polylactic acid (A-1) of A), polyether / olefin block copolymer resin (B1) PELESTAT 230 as copolymer resin (B) was added in the amount shown in Table 1, respectively. As a foaming nucleating agent, 2 parts by mass of talc (manufactured by Hayashi Kasei Co., Ltd., average particle diameter: 2.5 μm) was added. Using a liquid quantitative supply pump, inject PEGDM as the (meth)acrylate compound (C) and di-tert-butyl peroxide as the peroxide (D) from the middle of the mixer in the amounts shown in Table 1. (D-1) A solution (PEGDM / (D-1)=1 / 2 (mass ratio), concentration: 30% by mass) dissolved in plasticizer acetyl tricitrate was extruded and processed into pellets. The physical properties were evaluated after drying the obtained granula...
Embodiment 4～12、 comparative example 1～7
[0193] The biodegradable polyester resin (A), polyether / olefin block copolymer resin (B1), (meth)acrylate compound (C), and peroxide (D) were changed to the types shown in Table 1, quantity. Except for this, a resin composition was obtained in the same manner as in Example 1. Next, a foam sheet and a molded body were obtained. Table 1 shows the results of evaluating the physical properties of the obtained resin composition, foam sheet, and molded article.
[0194] As can be seen from Table 1, in Examples 1 to 3, it was confirmed that with the increase of the polyether / olefin block copolymer resin (B1) content, the IZOD impact strength and DuPont impact resistance of the resin composition were good, and the crystallization rate was high , the extensional viscosity is also high. When these resin compositions were subjected to foaming, there was no major problem in handling, and a uniform foam sheet having independent cells was obtained, and the tear strength and DuPont impact...
Embodiment 13
[0204] In the resin composition obtained in Example 2, an azodicarbonamide-based thermally decomposable foaming agent (VINYFOR AC#3, manufactured by Yonghe Chemical Co., Ltd.) was dry-mixed as a foaming agent to make it 1.5% by mass, and foaming was carried out. bubble test. That is, with a uniaxial 40mm diameter extrusion T-die testing machine (with 3.5 sections of a Sulzer type static mixer, a slit length of 500 mm, and a slit width of 1.5 mm), the melting temperature was 220° C. Film formation was carried out under the conditions of a die outlet temperature of 160° C., a screw rotation speed of 16 rpm, and a stretching speed of 3 m / min. The foaming state during film formation is extremely uniform, and the workability is good.
[0205]The expansion ratio of the obtained foam seat|seet was 4 times, and it comprised the independent type cell. Furthermore, the tear strength of the foam seat was 425 N / cm, the impact strength (DuPont impact resistance) was 20 cm, and it was a t...
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