How does polyvinyl alcohol material give black courier bag excellent wear resistance?
Publish Time: 2025-01-27
The application of polyvinyl alcohol (PVA) material in black courier bag is mainly to improve its wear resistance and other properties. Polyvinyl alcohol itself has good wear resistance, chemical corrosion resistance and barrier properties, which makes it widely used in packaging materials.
1. Characteristics of polyvinyl alcohol
Wear resistance: Polyvinyl alcohol has high wear resistance, which is due to the strong hydrogen bond force between its molecular chains, forming a dense structure that can resist external friction and wear.
Toughness: Polyvinyl alcohol has good toughness and can withstand impact and bending, reducing damage caused by external forces during transportation.
Adhesion: Polyvinyl alcohol has good adhesion properties and can be compounded with other materials to form a multi-layer structure, further improving the overall wear resistance and strength.
2. The production process of black courier bag
Raw material preparation: black courier bag is usually made of basic materials such as polyethylene (PE) or polypropylene (PP). In order to improve wear resistance, polyvinyl alcohol or other wear-resistant additives are added to it.
Coloring and additives: In order to make the courier bag appear black, carbon black or other black pigments are added. At the same time, in order to improve the wear resistance, polyvinyl alcohol or a composite material containing polyvinyl alcohol is added.
Mixing and extrusion: The base resin, polyvinyl alcohol, carbon black and other additives are mixed evenly, and then processed into a film through an extruder.
Bag making: The film is cut, heat-sealed and other processes are used to make courier bags.
3. The role of polyvinyl alcohol in black courier bag
Enhance wear resistance: The addition of polyvinyl alcohol can significantly improve the wear resistance of courier bags and reduce wear and damage caused by friction during transportation and use.
Improve barrier properties: Polyvinyl alcohol has good gas and water vapor barrier properties, which helps to protect the contents from the influence of the external environment.
Environmental protection: Polyvinyl alcohol is a biodegradable material that is more environmentally friendly than traditional plastics.
4. Practical application cases
Composite materials: Polyvinyl alcohol and polyethylene are compounded to form composite films. This material has both the softness and processability of polyethylene and the wear resistance and barrier properties of polyvinyl alcohol. It is widely used in the production of black courier bags.
Surface coating: A layer of polyvinyl alcohol is applied to the surface of the black courier bag to effectively improve its wear resistance and tear resistance.
Blending modification: Polyvinyl alcohol is blended with the base resin to form a homogeneous or heterogeneous blending system, thereby improving the wear resistance and other properties of the overall material.
By introducing polyvinyl alcohol material into the black courier bag, its wear resistance can be significantly improved, its service life can be extended, and better protection performance can be provided. The use of this material not only improves the quality of the packaging, but also conforms to the current trend of environmental protection and sustainable development. Therefore, the application of polyvinyl alcohol in black courier bags has important practical significance and market value.
