CN-116834410-B - Environment-friendly lightweight blow molding container and preparation method thereof

CN116834410BCN 116834410 BCN116834410 BCN 116834410BCN-116834410-B

Abstract

The invention relates to an environment-friendly lightweight blow molding container which is provided with a multilayer coextrusion structure, wherein the multilayer coextrusion structure comprises at least one layer of foaming layer, an inner surface supporting layer and an outer surface supporting layer, the foaming layer is positioned between the inner surface supporting layer and the outer surface supporting layer, the foaming layer comprises, by weight, 100 parts of waste plastic crushed material PP, 1-3 parts of diallyl isocyanurate, 5-10 parts of acrylamide, 0.3-0.5 part of an initiator, 3-10 parts of a foaming substance and 0-15 parts of other auxiliary agents, the foaming substance comprises a supporting substance, and the supporting substance is a three-dimensional porous structure material. The foaming product has stable foam cells, is not easy to collapse and has better heat insulation effect.

Inventors

PAN KAI
ZHU ZHENGCHAO
ZHONG ZHIQIANG
ZHANG LIPING

Assignees

天津瑞杰塑料制品有限公司

Dates

Publication Date: 20260505
Application Date: 20230614

Claims (5)

1. The environment-friendly lightweight blow-molded container is characterized by comprising a multi-layer co-extrusion structure, wherein the multi-layer co-extrusion structure comprises at least one foaming layer, an inner surface supporting layer and an outer surface supporting layer, and the foaming layer is positioned between the inner surface supporting layer and the outer surface supporting layer; The foaming layer comprises the following components, by weight, 100 parts of waste plastic crushed material PP, 1-3 parts of diallyl isocyanurate, 5-10 parts of acrylamide, 0.3-0.5 part of initiator, 3-10 parts of foaming material and 0-15 parts of other auxiliary agents; The foaming material comprises a supporting material, a terpene compound and a foaming agent, wherein the mass ratio of the terpene compound to the foaming agent to the supporting material is (7-11): 3-5): 1-2; The support is a three-dimensional porous structure material, and the three-dimensional porous structure material is one or a random mixture ratio combination of a plurality of MOF and cage-type polysilsesquioxane; the preparation method comprises the following steps: (1) Uniformly mixing a terpene compound, a foaming agent and a support according to a proportion, and then extruding and granulating to obtain a foaming material; (2) Then, according to the proportion, carrying out melt reactive grafting on waste plastic crushed PP, diallyl isocyanurate and acrylamide under the action of an initiator, and then adding the foaming material and other auxiliary agents to blend so as to obtain a foaming layer material; Simultaneously preparing the material of the inner surface supporting layer and the material of the outer surface supporting layer for melt blending; Sequentially carrying out multilayer coextrusion on the material of the inner surface supporting layer, the material of the foaming layer and the material of the outer surface supporting layer, and then carrying out blow molding to obtain an environment-friendly lightweight blow-molded container; the extrusion temperature of the foaming material is 80-130 ℃, and the temperature of the melt reactive grafting is 150-195 ℃ and the time is 2-8min.
2. The environment-friendly lightweight blow molding container according to claim 1, wherein the terpene compound is one or more of camphene, pinene and limonene in any proportion, and the foaming agent is one or more of citric acid, sodium bicarbonate, azodibenzoyl, sodium carbonate and ammonium bicarbonate in any proportion.
3. The environment-friendly lightweight blow molding container as claimed in claim 1, wherein the other auxiliary agent comprises one or more of antistatic agent, antioxidant and ultraviolet inhibitor, and the initiator is one of DCP, DTBP, BIPB.
4. The environment-friendly lightweight blow molding container according to claim 3, wherein the antistatic agent is a mixture of conductive carbon black and laurylamine polyoxyethylene ether in a mass ratio of 1:0.1-0.15, and the addition amount of the antistatic agent in the material of the foaming layer is 1-3 parts by weight; The antioxidant is a mixture of 1010 antioxidant and 168 antioxidant according to the mass ratio of 6:4-5:5, and the adding amount of the antioxidant in the material of the foaming layer is 3-5 parts by weight; The ultraviolet resistance agent is one of UV-3808, UV-531 and UV-770, and the adding amount of the ultraviolet resistance agent in the material of the foaming layer is 3-5 parts by weight.
5. The environment-friendly lightweight blow molding container according to claim 1, wherein the materials of the inner surface supporting layer and the outer surface supporting layer comprise the following components, by weight, 100 parts of HDPE, 3-5 parts of color masterbatch and 3-5 parts of antioxidant, wherein the antioxidant is a mixture of 1010 antioxidant and 168 antioxidant in a mass ratio of 6:4-5:5.

Description

Environment-friendly lightweight blow molding container and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to an environment-friendly lightweight blow molding container and a preparation method thereof. Background The polypropylene has the advantages of light weight, abundant raw material sources, no toxicity, no smell and the like, thereby being widely applied. However, polypropylene is a high crystalline polymer, the melt strength and viscosity of which drop sharply at high temperature, resulting in collapse, rupture, coalescence, etc. of cells during foaming, and the effect of the foamed product is not ideal. The waste plastics are seriously polluted, and the post-treatment is carried out only by means of incineration, landfill and the like, so that the environment is polluted, the energy consumption is high, and the environment-friendly concept is not met. Compared with the new material, the waste plastic has the advantages that the molecular chain is broken due to thermal, oxygen and photodegradation, the performance is reduced, and the daily use cannot be satisfied. In order to improve the current situation, the waste plastics are subjected to grafting modification, and then are blended with the foaming composition and other assistants for extrusion, so that the environment-friendly lightweight blow molding container product is prepared. Disclosure of Invention The invention provides an environment-friendly lightweight blow molding container and a preparation method thereof. The foaming product has stable foam cells, is not easy to collapse and has better heat insulation effect. In order to achieve the above purpose, the invention is realized by the following technical scheme: The environment-friendly lightweight blow-molded container comprises a multilayer coextrusion structure, wherein the multilayer coextrusion structure comprises at least one foaming layer, an inner surface supporting layer and an outer surface supporting layer, and the foaming layer is positioned between the inner surface supporting layer and the outer surface supporting layer; The foaming layer comprises, by weight, 100 parts of waste plastic crushed material PP, 1-3 parts of diallyl isocyanurate, 5-10 parts of acrylamide, 0.3-0.5 part of an initiator, 3-10 parts of a foaming material and 0-15 parts of other auxiliary agents, wherein the foaming material comprises a support, and the support is a three-dimensional porous structure material. Further, the foam also comprises terpene compounds and a foaming agent, wherein the mass ratio of the terpene compounds to the foaming agent to the support is (7-11): 3-5): 1-2. Still further, the three-dimensional porous structure material is any ratio combination of one or more of MOF, ZIF and cage polysilsesquioxane, the terpene compound is any ratio combination of one or more of camphene, pinene and limonene, and the foaming agent is any ratio combination of one or more of citric acid, sodium bicarbonate, azodibenzoyl, sodium carbonate and ammonium bicarbonate. Further, the other auxiliary agents comprise one or more of antistatic agents, antioxidants and ultraviolet resistance agents, and the initiator is one of DCP, DTBP, BIPB; still further, the antistatic agent is a mixture of conductive carbon black and laurylamine polyoxyethylene ether according to the mass ratio of 1:0.1-0.15, and the addition amount of the antistatic agent in the material of the foaming layer is 1-3 parts by weight; the antioxidant is a mixture of 1010 antioxidant and 168 antioxidant according to the mass ratio of 6:4-5:5, and the adding amount of the antioxidant in the material of the foaming layer is 3-5 parts by weight; The ultraviolet resistance agent is one of UV-3808, UV-531 and UV-770, and the adding amount of the ultraviolet resistance agent in the material of the foaming layer is 3-5 parts by weight. Further, the materials of the inner surface supporting layer and the outer surface supporting layer respectively comprise, by weight, 100 parts of HDPE, 3-5 parts of color masterbatch and 3-5 parts of antioxidant, wherein the antioxidant is a mixture of 1010 antioxidant and 168 antioxidant according to a mass ratio of 6:4-5:5. The preparation method of the environment-friendly lightweight blow molding container comprises the following steps: (1) Uniformly mixing a terpene compound, a foaming agent and a support according to a proportion, and then extruding and granulating to obtain a foaming material; (2) Then, according to the proportion, carrying out melt reactive grafting on waste plastic crushed material PP, diallyl isocyanurate and acrylamide under the action of an initiator DCP, and then adding the foaming material and other auxiliary agents to blend so as to obtain a foaming layer material; Simultaneously preparing the material of the inner surface supporting layer and the material of the outer surface supporting layer for