Full barrier film and vacuum full barrier chamber/bag, and production process thereof

Abstract

The invention relates to the field of water-gas isolation and safety in industries like food, drug safety, green building, aviation, spaceflight, energy, the war industry, scientific research and the manufacturing industry, and provides a full barrier film and a vacuum full barrier chamber / bag and a production process thereof. The film is prepared through compounding of pure aluminum glass fiber cloth, pure aluminum brown paper, multilayer polyvinylidene chloride (PVDC), polyvinyl alcohol (PVA for short), polyethylene terephthalate (PET), pure aluminum (Al) and high pressure polyethylene (LDPE), polypropylene (PP) or ethane-vinyl acetate copolymer (EVA). A multi-layer buffer structure has a full barrier effect on gas and water vapor and enables the leakage value of gas and water vapor to be zero. The full barrier film has significant influence in vacuum insulation, quality guaranteeing and efficiency guaranteeing of products like bags, bottles and boxes prepared from the full barrier film and exerts substantial effects; due to usage of a comprehensive compound manner, the full barrier film has strong structural capacity and excellent weatherability, can meet production requirements of hot forming and presents extremely excellent barrier performance and outstanding thermal deformation temperature when used in products and long-acting system engineering having extremely high barrier requirements.

Description

technical field [0001] The invention relates to the fields of high heat energy barrier energy saving and safety in food safety, drug safety, green building, aviation, aerospace, energy, military industry, scientific research, manufacturing industry and other industries, in particular to a composite film with full barrier and its ability to maintain vacuum for a long time. High degree of full barrier cavity / bag and production process. Background technique [0002] It can be seen from the relevant documents known to be used or published in the existing domestic and foreign markets that in many fields involving quality assurance and safety and high thermal energy barrier energy saving, high barrier materials are used to achieve barrier gas, water vapor, sound, microwave, Light, microorganisms, etc., these materials have different barrier properties. Even materials with very low barrier values ​​also have certain permeability. These materials are practical for projects with shor...

AI Technical Summary

Problems solved by technology

[0002] It can be seen from the relevant documents known to be used or published in the existing domestic and foreign markets that in many fields involving quality assurance and safety and high thermal energy barrier energy saving, high barrier materials are used to achieve barrier gas, water vapor, sound, microwave, Light, microorganisms, etc., these materials have different barrier properties. Even materials with very low barrier values ​​also have certain permeability. These materials are practical for projects with short barrier times, but they are not suitable for long-term barrier fields Difficult to be effective, on the contrary, it will mislead the application, resulting in adverse consequences, for example, the quality and safety of food, the efficacy and safety of medicines, vacuum insulation panels for energy-saving and fire-proof decoration of green buildings, vacuum insulation panels for refrigeration, heat preservation and energy-saving, high cold and high heat Walls such as movable warehouses used in harsh environments to block vacuum insulation panels, etc. The cavity / bag used in this type of product is made of glass fiber cloth, aluminum foil film, PET, PA, PVC, EVOH, PC, PE, PP, etc. It is made of composite materials, and some materials have certain high barrier properties. The composite methods include flow, glue, co-extrusion, heat fusion and other methods. The barrier films and cavities / bags formed by these methods are generally hidden in the short term and difficult to find. Defects of permeability: firstly, the material body has low density, and the objective reality of micropore permeability exists in different degrees; secondly, the composite film with improper adhesive method is easy to creep and deform under the influence of external environment, forming a shear force between materials. This will lead to a decrease in the structural strength of the membrane body, and in severe cases, delamination will occur, which is also the main reason for the decrease in the barrier effect. It is easy to cause micro-loosening of the cavity material applied to the vacuum, and it is difficult to ensure a permanent vacuum degree, and the thermal insulation effect will gradually decrease. , the mechanical structural force of the plate body also decreases, and the flatness of the plate surface will also be deformed, which in turn leads to a joint decrease in the source structural force of the engineering wall. Empty shells or layers will slowly fall off after a long time. It is difficult to achieve the same lifespan as the vacuum insulation board and the building material. In addition, it is easy to be infected with microorganisms in food and cause deterioration and odor. It is used in The drug loses its due effect, hidden harm to human health and safety