Treatment method for whitening of inner surface of food grade glass fiber reinforced plastic container

Abstract

The invention discloses a treatment method for the whitening of the inner surface of a food grade glass fiber reinforced plastic container, which mainly comprises the following steps that: a top seal, a cylinder body and a bottom are manufactured by adopting a winding process, and then the operation of joint reinforcement is carried out on the head of the top seal and the cylinder body and the cylinder body and the bottom, wherein a manual hand-pasting reinforcement process is adopted for the operation of joint reinforcement. The treatment method for the whitening of the inner surface of the food grade glass fiber reinforced plastic container is characterized in that a process of jointing demoulding cloth is added after the manual hand-pasting reinforcement process is carried out. The concrete steps are as follows: a reinforcement-glass fiber reinforced plastic layer which is an outermost layer of a manual hand-pasting reinforcement is additionally pasted with a layer of chemical-fibre demoulding cloth which is not bonded with resin after being solidified with the resin, and then the chemical-fibre demoulding cloth is torn off after being stood and solidified completely so as to finish the process. According to the process, wax liquid does not need to be added into the resin, and solidifying treatment after heating also does not need to be carried out, so that the inner surface of the reinforcement which is fully solidified can be obtained, and the problem of whitening is thoroughly deracinated; and the chemical-fibre cloth is soft, so that the construction of areas, such as an arc face, a corner and the like, in the hand pasting process is convenient, the efficiency is high, and the quality of the inner surface of a product is better ensured.

Description

technical field [0001] The invention relates to a manufacturing process of a glass vessel, in particular to a method in which a glass fiber is used to manufacture a body through a winding process, and then spliced ​​to obtain a vessel. Background technique [0002] FRP products have the advantages of corrosion resistance, aging resistance and long service life. And it has the characteristics of light weight, high strength, anti-seepage, heat insulation, insulation, non-toxic and smooth surface. Containers made of FRP can be used to store various corrosive media, resistant to various acids, alkalis, salts and organic solvents, and can also be used for various food containers. Such as: vinegar, soy sauce and acidic food containers; food fermentation tanks, drying tanks; wine, alcohol and fatty food containers, etc., the product has a smooth surface, clean and easy to clean, anti-microbial corrosion, non-toxic and tasteless, low thermal conductivity , Effectively maintain con...

AI Technical Summary

Problems solved by technology

For container products, since the inner surface seam is a curved surface, the solution can only be solved by adding resin to the wax solution. For food-grade containers, the addition of wax solution increases the surface cleaning difficulty and even causes pollution. Therefore, some containers clearly stipulate that it is not allowed Add wax liquid. In addition, for some resins that are easily cured by oxygen and moisture, because the wax liquid cannot completely isolate the air, the surface with the wax liquid will not be whitened before cleaning, but after strict hot water, After repeated washing procedures with alkali and acid, the phenomenon of whitening still occurs at the seam reinforcement

Experiments have found that the whitening phenomenon can be reduced to a certain extent by cooperating with post-heating curing treatment, but it cannot completely eliminate the whitening phenomenon. Therefore, for some resins that are easily cured by oxygen and moisture, how to prevent the whitening phenomenon is a difficult problem

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