CN-121991474-A - Compression-resistant PET plastic bottle composite material and preparation method thereof

Abstract

The invention discloses a compression-resistant PET plastic bottle composite material and a preparation method thereof, relates to the technical field of polyethylene terephthalate, and belongs to the patent publication number C08L67/02. The preparation method comprises the steps of calcining and activating basalt short fibers, processing the basalt short fibers by gamma-aminopropyl triethoxysilane to obtain amino-functionalized basalt short fibers, melting and extruding the amino-functionalized basalt short fibers and PBT to prepare coupled basalt short fiber reinforced master batches, preparing epoxy group ultrafine crosslinked microspheres by taking glycidyl methacrylate and divinylbenzene as monomers through microsuspension polymerization, mixing PET resin, the reinforced master batches, the epoxy group ultrafine crosslinked microspheres, calcium stearate and pentaerythritol stearate, and performing reactive extrusion. The PET plastic bottle composite material prepared by the invention has good compression resistance.

Inventors

• LUO FENG
• LIANG JIAFENG
• CHEN PENG

Assignees

• 广东新潮塑胶科技有限公司

Dates

Publication Date

20260508

Application Date

20260326

Claims (10)

1. 1. The preparation method of the compression-resistant PET plastic bottle composite material is characterized by comprising the following steps of: 1) Calcining the basalt short fiber to obtain an activated basalt short fiber; 2) Dispersing the activated basalt short fibers in absolute ethyl alcohol, adding gamma-aminopropyl triethoxysilane and glacial acetic acid for reaction, and obtaining amino functional basalt short fibers after suction filtration, washing and drying; 3) Mixing the amino-functionalized basalt short fibers with polybutylene terephthalate, and performing melt extrusion and granulating to obtain coupled basalt short fiber reinforced master batch; 4) Mixing glycidyl methacrylate, divinylbenzene, azodiisobutyronitrile, deionized water and sodium dodecyl sulfate for microsuspension polymerization, adding calcium chloride aqueous solution for demulsification after the reaction is finished, filtering out a solid product, and washing, drying and grinding to obtain epoxy ultrafine crosslinked microspheres; 5) And respectively drying and mixing polyethylene terephthalate resin, the coupling basalt short fiber reinforced master batch, the epoxy ultrafine crosslinking microsphere, calcium stearate and pentaerythritol stearate, and performing reactive extrusion, cooling and granulating on the mixture to obtain the compression-resistant PET plastic bottle composite material.
2. 2. The method for preparing the compression-resistant PET plastic bottle composite material according to claim 1, wherein in the step 1), the calcination temperature is 440-450 ℃ and the calcination time is 50-60 min.
3. 3. The method for preparing the compression-resistant PET plastic bottle composite material according to claim 1, wherein in the step 2), the addition amount of gamma-aminopropyl triethoxysilane is 3-5wt% of the activated basalt short fiber.
4. 4. The method for preparing the compression-resistant PET plastic bottle composite material according to claim 1, wherein in the step 2), the addition amount of glacial acetic acid is 0.5-0.8wt% of the activated basalt short fiber.
5. 5. The preparation method of the compression-resistant PET plastic bottle composite material according to claim 1, wherein in the step 3), the mass ratio of the amino-functionalized basalt short fiber to the polybutylene terephthalate is (15-20): 80.
6. 6. The method for preparing the compression-resistant PET plastic bottle composite material according to claim 1, wherein in the step 4), the mass ratio of glycidyl methacrylate to divinylbenzene is 8 (0.5-1.5).
7. 7. The method for preparing the compression-resistant PET plastic bottle composite material according to claim 1, wherein in the step 4), the reaction temperature of the microsuspension polymerization is 70-75 ℃ and the reaction time is 4-6 h.
8. 8. The preparation method of the compression-resistant PET plastic bottle composite material according to claim 1 is characterized in that in the step 5), the mass ratio of polyethylene terephthalate resin to coupled basalt short fiber reinforced masterbatch to epoxy-based ultrafine crosslinked microspheres is 100 (10-15): 2-5.
9. 9. The preparation method of the compression-resistant PET plastic bottle composite material according to claim 1, wherein in the step 5), the mass ratio of calcium stearate to pentaerythritol stearate is 5 (2-4).
10. 10. A compression resistant PET plastic bottle composite material, characterized in that it is prepared by the method of any one of the preceding claims 1 to 9.

Description

Compression-resistant PET plastic bottle composite material and preparation method thereof Technical Field The invention relates to the technical field of polyethylene terephthalate, belongs to the patent publication number C08L67/02, and particularly relates to a compression-resistant PET plastic bottle composite material and a preparation method thereof. Background In the fields of daily chemicals, cosmetic products and the like, products requiring internal pressure such as sun protection spraying and the like are mainly internally pressed aluminum cans at present, and the aluminum cans can meet the working pressure requirement required by the products after being filled with propellant by virtue of excellent pressure resistance, and meanwhile, the packaging containers have good sealing property and molding processability and have been dominant in the field for a long time. However, the internal pressure aluminum can has a plurality of non-negligible defects in the practical application process, and the sustainable development and application expansion of the internal pressure aluminum can are limited. Firstly, the manufacturing cost of the aluminum can is higher, the production process of the aluminum can involves a plurality of complex procedures such as aluminum plate rolling, can body integral stamping, inner wall coating and the like, the requirement on forming precision is extremely high, the die loss is high, the rejection rate is difficult to control, the comprehensive manufacturing cost is obviously higher than that of a plastic packaging container, and the cost disadvantage is more remarkable especially in the large-scale production of products such as small-capacity sun-proof spraying and the like. Secondly, aluminum resources belong to non-renewable resources, the consumption of the aluminum resources is increased due to excessive dependence on aluminum can packaging, the recycling of the aluminum cans has a certain foundation, but the recycling system is not fully constructed, the closed-loop utilization ratio of the recycled aluminum still has a lifting space, meanwhile, the energy consumption in the recycling and remelting process is higher, the current industry development trend of environmental protection low carbon and resource recycling is not met, and the environment-friendly management requirements of future such as European Union CBAM mechanisms are difficult to adapt. In addition, aluminum can's design flexibility is relatively poor, is difficult to realize diversified molding, color and printing effect, can't fully satisfy the high-end demand of beautiful appearance product to packing visual appeal, and aluminum can own weight is relatively great, is unfavorable for the transportation, the carrying of product, also can increase the carbon emission and the cost of commodity circulation link. Polyethylene terephthalate (PET) plastic is used as a common packaging material, has the advantages of light weight, high transparency, strong recoverability, convenient molding and processing, low cost, flexible appearance design and the like, and has basic mechanical properties as a pressure container. However, the conventional PET plastic has limited compression resistance, and particularly under the condition of bearing continuous internal pressure, the problems of deformation, leakage, even cracking and the like are easy to occur, and the means for improving the compression resistance of the PET bottle in the industry at present mainly depend on bottle type structural optimization (such as reinforcing ribs are added, the cross section shape is changed) and bottle blowing process adjustment (such as stretching ratio improvement and temperature gradient optimization), but the improvement range of the methods is limited. From the material modification point of view, the bearing capacity of the composite material body is improved by introducing the functional reinforcing component into the PET matrix, so that the composite material is an effective way for breaking through the bottleneck. However, the conventional method is often only improved in a certain dimension of rigidity or toughness, and the balance of the rigidity and the toughness is difficult to be achieved, and the comprehensive compression resistance of the plastic bottle in a complex stress state is truly determined by the coordination between the rigidity and the toughness. Therefore, the composite material capable of systematically improving the compression resistance of the PET plastic bottle from the material level and the preparation method thereof are developed, and the composite material has important practical significance and application value for promoting the cost reduction and synergy of the packaging industry and realizing green sustainable development. Disclosure of Invention The invention aims to provide a compression-resistant PET plastic bottle composite material and a preparation method thereof, so as to solve the