Preparation method for high-toughness plastic straight ruler

Abstract

The invention discloses a preparation method for a high-toughness plastic straight ruler and belongs to the field of study article preparation. The preparation method comprises the steps that bamboos are sliced into bamboo skins at first, the bamboo skins are soaked with biogas liquid, bamboo fibers are activated through enzymes produced by microorganisms in the biogas liquid, and then the bamboo skins are exposed under the sun to be aged, so that the binding force among the bamboo fibers is further reduced; the bamboo skins are mixed with an NaOH solution at a high temperature, and sliding and swelling of microfiber layers are facilitated; processing is conducted through liquid nitrogen, so that ice crystals are formed in fiber cells; grinding is conducted through a stone mill, so that the ice crystals in the cell walls are ruptured due to the pressure effect, and the fibers are separated into micro-nano fiber crystal whiskers which are mixed with special-shaped polyethylene powder obtained through polymerization under the electric field condition according to the proportion; and after injection molding and grinding are conducted, scales are printed, so that the high-toughness plastic straight ruler is obtained. The high-toughness plastic straight ruler obtained through the preparation method benefits from the high toughness of the bamboo fibers and is high in impact strength and not prone to being broken, the service life is greatly prolonged compared with that of a traditional plastic straight ruler, and large-scale application and popularization can be achieved.

Description

technical field [0001] The invention discloses a preparation method of a high-toughness plastic ruler, which belongs to the field of school supplies preparation. Background technique [0002] Ruler, used to measure length, is widely used in mathematics, surveying, engineering and other subjects. A ruler is a ruler-shaped gauge with precise straight edges. A ruler is also called a ruler. It is a very commonly used instrument for measuring length. This kind of stationery is the most common. At present, the most commonly used rulers are divided according to their materials: 1. Alloy rulers such as stainless steel. This kind of ruler has a long service life, but it is difficult to recover after bending and deformation, and the production cost is relatively high compared to other materials. High, the accuracy will decrease after wear and tear, and it cannot be repaired; 2. Wooden ruler, wooden ruler is light in weight and easy to carry, but its service life is limited, it is eas...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor toughness, brittleness, low impact resistance, easy stress fracture and short service life of traditional plastic rulers in the process of preparation and use, a method for preparing a high-toughness plastic ruler is provided. In the present invention, bamboo slices are firstly made into bamboo rafts, and then the bamboo rafts are soaked in biogas liquid, and the bamboo fibers are activated by enzymes produced by microorganisms in the biogas liquid, and then exposed to the sun for aging, so that the binding force between fibers is further reduced, and then NaOH solution is used to It is mixed with bamboo strips at high temperature to promote the sliding and swelling of the microfiber silk layer, and then treated with liquid nitrogen to form ice crystals in the fiber cells, and then ground by a stone mill, so that the ice crystals in the cell walls are broken by pressure and the fibers are separated into Micro-nano-scale fiber whiskers are mixed in proportion with special-shaped polyethylene powder obtained by polymerization under electric field conditions, injection molding, and printing scales after grinding to obtain high-toughness plastic rulers