Acid-proof and acid removing multifunctional compound packaging material

Abstract

The invention relates to an acid-proof and acid removing multifunctional compound packaging material, which is used for preventing gathering of acid substances such as various films, magnetic tapes, literary works and the like, avoiding vicious circle and removing produced acid substances. The compound packaging material consists of three layers of materials, wherein an outer layer is a plastic compound film for preventing external harmful substances from eroding a packaged substance; a middle layer is qualitative filter paper (called an acid absorbing layer) which is treated with an indicator-containing alkaline solution and is used for absorbing acid substances released by the packaging material; and an inner layer is neutral paper for isolating the acid absorbing layer from the packaged substance and avoiding possible damage of the acid absorbing layer on the packaged substance (figures are shown in the specifications).

Description

Technical field [0001] The invention relates to a kind of anti-acid and acid-removing multifunctional composite material (hereinafter referred to as composite materials). Background technique [0002] In order to prevent the "vinegar syndrome" caused by the hydrolysis of the cellulose acetate film base, which seriously affects the life of the acetate film base, Kodak Company uses molecular sieves to absorb the acidic substances released from the film base. 7~14% of film itself; The 2nd, needs to seal with polyester bag, is not easy to use. The "Keep well film protection sheet" invented by Fujifilm has a very limited acid absorption capacity, and can only be used for newly developed films. It is powerless for acid-produced films and is expensive. Contents of the invention [0003] In order to overcome the disadvantages of inconvenient application of existing materials, small amount of acid absorption, and high price, the invention provides an acid-proof and acid-removing ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of inconvenient application of existing materials, small amount of acid absorption, and high price, the invention provides an acid-proof and acid-removing multifunctional composite material. The advantages of the composite material are: 1) not only prevents the Such as the accumulation of acidic substances, it can also remove the acidic substances that have been produced; 2) It can not only prevent acid and deacidify the packaging, but also prevent external harmful substances from harming the packaged objects; 3) By observing the change of the color of the composite packaging material , you can clearly know the change of the acid absorption capacity of the composite packaging material, so as to replace the new composite material in time; 4) The acid absorption capacity is large, and the effective use time is long; 5) Cheap

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