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Food-grade polypropylene composite material and preparation method and application thereof

A composite material, food-grade technology, applied in the field of new materials, can solve the problems of non-compliance with hygienic standards, poor environmental performance, poor degradation performance, etc., and achieve the effects of low cost, improved performance, and easy degradation.

Active Publication Date: 2010-09-01
富岭科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the degradation performance of the composite material is poor, and the environmental protection performance of the tableware produced by it is poor, which does not meet the hygienic standard.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Under the conditions of GMP and HACCP, take 78Kg of food-grade additive calcium carbonate with a particle size of 800 mesh, 1.2Kg of food-grade paraffin, 0.8Kg of food-grade calcium stearate, and 20Kg of polypropylene resin that meets the standard of 21CFR177.1520 and put them into high-speed mixing machine, at a temperature of 75-125°C, stir at a speed of 475-950r / min for 15-30min before use.

[0034] The above-mentioned mixture is granulated with a twin-screw extruder, and the screw temperature is 180-230° C. to obtain master batches.

[0035] The prepared 75Kg masterbatch is mixed with 75Kg polypropylene resin, and injection molded into tableware with an injection molding machine. In the finished tableware, the content of calcium carbonate is 39wt%, and the total content of polypropylene is 60wt%.

[0036] Tableware products are subjected to migration tests according to the food simulants used by the US FDA, and all performance indicators are up to standard.

Embodiment 2

[0038] Under the conditions of GMP and HACCP, 26.5Kg of 600-mesh food-grade additive calcium carbonate, 0.3Kg of food-grade calcium stearate, 0.2Kg of food-grade stearic acid, and 73Kg of polypropylene resin meeting the 21CFR177.1520 standard were taken. Put 0.1Kg of food-grade colorant titanium dioxide into a high-speed mixer, stir at a speed of 475-950r / min for 10-25min at a temperature of 75-105°C and set aside for use.

[0039] The above-mentioned mixture is granulated with a twin-screw extruder, and the screw temperature is 180-230° C. to obtain master batches.

[0040] The prepared masterbatch is used to prepare tableware, the content of calcium carbonate in the finished tableware is 26.5wt%, and the total content of polypropylene is 73wt%.

[0041] The migration test of the product is carried out according to the food simulants used by the US FDA, and all performance indicators are up to the standard.

Embodiment 3

[0043] Under the conditions of GMP and HACCP, take 22.5Kg particle size of 1000 mesh food-grade additive calcium carbonate, 0.5Kg food-grade hydrocarbon wax, 77Kg polypropylene resin conforming to 21CFR177.1520 standard, 0.05Kg food-grade colorant ultramarine blue, put into In a high-speed mixer, stir at a speed of 475-950r / min for 10-20min at a temperature of 65-100°C before use.

[0044] The prepared mixture was prepared into tableware, and the calcium carbonate content in the finished tableware was 22.5wt%, and the total content of polypropylene was 77wt%.

[0045] The products are subjected to migration tests according to the food simulant used by the US FDA, and all performance indicators are up to standard.

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Abstract

The invention relates to a food-grade polypropylene composite material, a preparation method and an application thereof. The composite material is composed of the following components in mass percentage: 48-78wt% of polypropylene, 20-50wt% of food-grade additive calcium carbonate; 0.5-2wt% of food-grade processing aid and 0-1.0wt% of food-grade coloring agent, wherein the food-level standard is as follows: the content is 98.0-100% calculated by dry basis, the loss on drying is less than or equal to 2.0%, the content of acid insoluble matter is less than or equal to 0.2%, the content of fluoride is less than or equal to 0.005%, the content of alkali metals and magnesium salt is less than or equal to 1.0%, the content of arsenic metals is less than or equal to 3.0mg / kg, and the content of lead metals is less than or equal to 3.0mg / kg. The food-grade polypropylene composite material and the prepared tableware in the invention have favorable mechanical property and lower cost; and compared with the traditional tableware, the tableware filled with food-grade additive calcium carbonate are more in accordance with the hygienic standard and are easily degraded.

Description

technical field [0001] The invention relates to a polyolefin composite material, in particular to a food-grade polypropylene composite material and its preparation method and application; it belongs to the technical field of new materials. Background technique [0002] Polypropylene is usually a translucent colorless solid, odorless and non-toxic. Due to its regular structure and high crystallization, its melting point is as high as 167°C. It is heat-resistant and its products can be sterilized by steam. The density is 0.90g / cm 3 , is the lightest general-purpose plastic. Corrosion resistance, tensile strength can reach 30MPa, strength, rigidity and transparency are better than polyethylene. [0003] Polypropylene is a polymer material prepared from petroleum. Petroleum is the main energy source for human beings to survive at present, and the petroleum resources on the earth are limited after all. Therefore, saving petroleum resources is the concern of all countries in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/02C08K3/26C08J3/22A47G19/00
Inventor 陈启早胡新福
Owner 富岭科技股份有限公司
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