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What is the temperature requirement of the PE protective film during the production process?

time:2021/2/26 9:44:06 browse:

PE protective film is a new type of packaging material in the logistics industry. It is also widely used in centralized packaging of various commodities. It is widely used in export, papermaking, hardware, plastic chemicals, building materials, food and medicine industries. In the production of PE protective film, there are great requirements for temperature. Let's talk about the temperature requirements of PE protective film in the production process?


PE protective film is to protect products from pollution, corrosion and scratches during production, processing, transportation, storage and use, and to protect the original smooth surface, thereby improving product quality and market competitiveness


The production process of PE protective film can be divided into the following two stages according to the temperature


1. Heating stage


On the premise of ensuring that the PE protective film blank is not affected by steam, as long as the steam is continuously and uniformly fed into the curing chamber for 1-1.5 hours, the heating time should be shortened as much as possible.


For example, under the humid and hot condition of 96-100°C, the constant temperature time in spring and autumn is 8 hours, in summer it is 7 hours, and in winter it is 10 hours. In the cooling stage, when the production volume is large and the solidification chamber space is insufficient, the door of the solidification chamber should be opened and a rapid cooling method should be adopted, which will increase the temperature difference stress between the solidification chambers. The surface and inside of the PE protective film will tension the surface and easily form micro-cracks. Therefore, the cooling rate must be controlled, and the cooling rate should not exceed 10°C per 30 minutes; the temperature difference between indoor and outdoor curing should not be greater than 30°C, and the finished PE protective film can be indoors.


2. Constant temperature table


The constant temperature stage is an important stage in which the strength of the green body increases due to hydration and hydrothermal synthesis. With the extension of the constant temperature time, more and more hydrates accumulate and the intensity becomes faster and faster. However, when the constant temperature reaches a certain time, the increase in intensity begins to slow down. Different ratios of raw materials, different production processes, produced from aerated billets, have corresponding optimal constant temperature times.


The above is the temperature requirement of PE protective film in production. In daily production, strictly controlling the production temperature of PE protective film is a necessary condition to ensure that PE protective film products have high tensile strength, large elongation, good self-adhesiveness, high transparency, and are widely used in various industries. . . Stainless steel plates, aluminum plates, aluminum alloy profiles, plastic steel profiles and doors and windows, aluminum composite panels, fluorocarbon panels, mirror panels, sandwich colored steel plates, fireproof panels, decorative panels, plexiglass panels, PS, PE, PVC panels, daylight panels ( Polycarbonate board), anti-theft doors, signs, coated glass, high-end furniture, high-end crafts, electrical cabinets, computer housings, car lamps, floors, home appliance housings, instrumentation and other fields that need to protect the surface of the product can be used.