Preparation method for colored paper pulp moulded product

Abstract

The invention discloses a preparation method for a colored paper pulp moulded product. The method comprises the steps that bamboo fiber sizing agent is prepared, and an adhesive, a water-proofing agent and an anionic emulgator of corresponding weight parts are added and stirred into paper pulp suspension liquid; direct sun-proof black or direct sun-proof orange is diluted and added into the abovepaper pulp suspension liquid; finally the paper pulp suspension liquid is put into a mould machine for dehydration and subjected to hot press molding. The invention further discloses the colored paperpulp moulded product prepared by the above method. The moulded product is uniform in coloring, can be easily degraded in a natural environment and is an environmentally friendly colored paper pulp moulded product.

Description

technical field [0001] The invention relates to the field of pulp molding, in particular to a preparation method of colored pulp molding products. Background technique [0002] In recent years, with the increasing demand for manufacturing products, especially for outer packaging manufacturing products, the immature manufacturing process has also brought corresponding environmental problems, and people's growing awareness of environmental protection has made technicians In-depth research on the manufacture of renewable resources. [0003] Traditional pulp molding products are mostly used to make paper tableware, fruit and egg trays, and lining cushioning materials for product packaging instead of plastic. For the outer packaging of products with high appearance requirements, traditional materials such as plastics and iron boxes are still used, which are not environmentally friendly and costly. In the field of papermaking, the surface properties of paper are mostly improved ...

AI Technical Summary

Problems solved by technology

Due to the particularity of pulp molded products, the surface is uneven, and the surface of traditional pulp molded products is relatively rough, and the appearance is relatively poor compared to other types of packaging. This is related to the fiber characteristics of pulp. The rough fiber surface and easy water absorption , flammability and other properties make the prepared products have certain limitations in these aspects

[0004] As a fast-growing and high-yielding plant, bamboo fiber not only has a high survival rate and a short growth period, but also has strong wear resistance and moisture absorption, which is stronger than cotton fiber and viscose fiber, and has broad application prospects. Or renewable resources have super hygroscopicity in an instant, which also requires higher requirements for their water resistance to a certain extent

On the other hand, in order to improve the water repellency and oil repellency of the existing pulp molding products, the corresponding water repellent and oil repellant are added, and the above-mentioned products are in the process of natural degradation, due to the characteristics of the water repellent are weak. Cationic, when it is added to the pulp, it will adhere to the surface of the fiber due to electrostatic adsorption, forming a layer of film on the surface of the fiber, making the connection between the fiber and the fiber tighter, and inhibiting the breakage of the cellulose macromolecular chain to a certain extent. Therefore, as the amount of waterproofing agent is imposed, its tensile strength increases, its quality declines slowly in the natural environment, and its weight loss rate decreases; at the same time, there are grooves and cracks on the surface of the cavity in the bamboo fiber, and there are branches in the transverse direction, and the quality The light feature makes it have excellent dyeing property, but the color fastness to direct dyes is poor, and the fiber crystallization area grows during the dyeing process, and the structure becomes compact, so that the dyeing rate decreases and the dyeing rate is not enough Uniform, and also poses problems for natural degradation in the later period

Images