High-toughness polypropylene plastic, and preparation method and applications thereof

Abstract

The invention discloses a high-toughness polypropylene plastic, and belongs to the field of plastic rigid package, and more specifically relates to a high-toughness polypropylene plastic and a PP thinwall plastic container. The high-toughness polypropylene plastic is prepared from polypropylene, castor oil modified hyper branched polyurethane and acrylamide methyl substituted cellulose ester polymer. The high-toughness polypropylene plastic is high in fusion index, and toughness, possesses excellent tensile properties, and is suitable for thin wall injection moulding. The invention also discloses a preparation method of the high-toughness polypropylene plastic. The preparation method comprises following steps: A1, polypropylene, castor oil modified hyper branched polyurethane and the acrylamide methyl substituted cellulose ester polymer are introduced into a mixing machine for uniform stirring; A2, a mixture obtained in step A1 is subjected to extrusion granulation. The invention alsodiscloses applications of the high-toughness polypropylene plastic. The high-toughness polypropylene plastic is subjected to injection moulding, stretching, and blow moulding so as to obtain the PP thin wall plastic container which is high in toughness and excellent in resistance to dropping.

Description

technical field

[0001] The invention relates to the field of hard plastic packaging, more specifically, to a high-toughness polypropylene plastic. Background technique

[0002] With the rising international oil prices, the pursuit of lightweight and low cost has gradually become the main trend of plastic rigid packaging. Thin-wall injection molding has attracted people's attention from the perspective of resource conservation, energy conservation and emission reduction. However, thin-wall injection molding generally requires the use of high-melt index materials, and high-melt index polypropylene is brittle and has low toughness, resulting in poor impact resistance of the prepared PP thin-wall plastic containers.

[0003] Adding plasticizer can improve the flexibility of plastic products and improve impact resistance. Modified vegetable oil plasticizers such as epoxidized soybean oil and modified castor oil have become a hot spot in the field of plasticizer research because...

Examples

Embodiment 1～5 and comparative example 1

[0048] Embodiments 1 to 5 and comparative example 1 were prepared according to the above method, wherein the raw material addition amount of castor oil modified hyperbranched polyurethane is as shown in Table 1; the polypropylene plastics and PP plastics of embodiments 1 to 5 and comparative examples 1 to 2 The raw material addition of thin-walled plastic container is as shown in table 2;

[0049] Table 1 (raw material addition, unit: g)

[0050]

[0051] Table 2 (raw material addition, unit: g)

[0052]

technical field

[0001] The invention relates to the field of hard plastic packaging, more specifically, to a high-toughness polypropylene plastic. Background technique

[0002] With the rising international oil prices, the pursuit of lightweight and low cost has gradually become the main trend of plastic rigid packaging. Thin-wall injection molding has attracted people's attention from the perspective of resource conservation, energy conservation and emission reduction. However, thin-wall injection molding generally requires the use of high-melt index materials, and high-melt index polypropylene is brittle and has low toughness, resulting in poor impact resistance of the prepared PP thin-wall plastic containers.

[0003] Adding plasticizer can improve the flexibility of plastic products and improve impact resistance. Modified vegetable oil plasticizers such as epoxidized soybean oil and modified castor oil have become a hot spot in the field of plasticizer research because...

Examples

Embodiment 1～5 and comparative example 1

[0048] Embodiments 1 to 5 and comparative example 1 were prepared according to the above method, wherein the raw material addition amount of castor oil modified hyperbranched polyurethane is as shown in Table 1; the polypropylene plastics and PP plastics of embodiments 1 to 5 and comparative examples 1 to 2 The raw material addition of thin-walled plastic container is as shown in table 2;

[0049] Table 1 (raw material addition, unit: g)

[0050]

[0051] Table 2 (raw material addition, unit: g)

[0052]

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