Preparation method and application of soft-base curing component material

Abstract

Provided are a preparation method and a use of a material for a soft foundation curing treatment member. The material for a soft foundation curing treatment member is a polypropylene composition. The polypropylene composition is prepared from the following raw materials in parts by weight: 90-95 parts of polypropylene, 1.5-2 parts of a composite light stabilizer, 1-2 parts of a composite antioxidant, 2-3 parts of ultrafine carbon black, 0.3-0.5 part of a coupling agent and 1-2 parts of a dispersing agent. The antioxidant and the light stabilizer in the formula of the polypropylene composition can have the maximum efficacy; when used as a packaging material thin preparation, the prepared polypropylene composition has an excellent super weather resistance, and can be aged for 1500 hours under UVB ultraviolet with a tensile strength and the elongation at break of polypropylene remaining at no less than 80%, i.e., after being used outdoors for 7-8 years, the mechanical properties of the preparation can also remain at no less than 80%, which is drastically improved when compared with an outdoor use time of about 1 year of a product currently available on the market.

Description

Technical field [0001] The invention belongs to the field of soft foundation curing treatment component materials, and particularly relates to a preparation method and application of a soft foundation curing treatment component material. Background technique [0002] The main structure of the soft base curing treatment member material is made of polypropylene base cloth. Polypropylene (PP for short) is a thermoplastic resin that can be made by polymerizing propylene. It not only has the advantages of good processability, good toughness, and good chemical stability, but also light weight and low cost, so it is widely used. Such as can be used in the packaging field. However, polypropylene is very sensitive to ultraviolet rays, and is insufficient in terms of weather resistance and heat resistance. It is prone to aging and degradation after the action of ultraviolet rays, heat, and oxygen, resulting in performance degradation and discoloration. These shortcomings limit the use of ...

AI Technical Summary

Problems solved by technology

However, polypropylene is very sensitive to ultraviolet rays, and is relatively insufficient in weather resistance and heat resistance. It is prone to aging and degradation after the action of ultraviolet rays, heat, and oxygen, resulting in performance degradation and discoloration. These shortcomings limit the use of PP, especially Restrict the application of PP in outdoor packaging products, especially for products that are placed outdoors for a long time with weather resistance requirements. The weather resistance of PP must be improved in order to expand the application field of PP

[0003] In the prior art, the weather resistance of polypropylene is generally improved by adding heat stabilizers and light stabilizers. The selected stabilizers are generally a single hindered amine light stabilizer, a single antioxidant or compounded with an appropriate amount of ultraviolet rays Absorbents, but often do not consider the synergistic effect between light stabilizers, the antagonistic effect between light stabilizers and some antioxidants, the compatibility of light stabilizers and resins, and the effect of light stabilizers on the mechanical properties of PP And the influence of color on the weather resistance of products, etc.

If the choice is not appropriate, the light stabilizer is mixed with other materials, which will cause the light stabilizer and antioxidant to be easily destroyed, thus affecting the antioxidant and the light stabilizer cannot exert the maximum effect, resulting in the weather resistance and heat resistance of the material. performance drops drastically

In addition, the PP currently used in the packaging field in China generally requires relatively short weather resistance, and generally only meets the standard of ASTM G-154, that is, it only meets the weather resistance of ultraviolet aging for 200h, and the product strength is retained by 50%. It can be used outdoors for about 1 year, which seriously limits the wider range of use of the product

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