The birth of stretch film brings us a lot of convenience in our life. At present, stretch film should be very extensive, especially in product packaging and transportation. So do you know what external factors will affect the tensile film. Especially temperature and temperature have a great influence on the manufacturing of stretch film. In the manufacturing process of stretch film, the control stage of autoclave and gas filling block occupies a proper and important position. The maintenance of high temperature and high pressure steam can remove the free water from the membrane blank, and the particles of the blank are compressed and close to each other, which can reduce the thermal expansion damage caused by the rapid transpiration of water. So what’s the impact on the temperature of the stretched film? Today, qianghui technology’s stretched film manufacturer will give you a detailed explanation:
- In the heating stage, on the premise of ensuring that the stretch film blank is not affected by the steam, the heating time should be shortened as much as possible, and only 1.0-1.5 hours of steam should be fed into the maintenance room continuously and evenly.
- The constant temperature stage is an important stage in which the strength of green body increases due to hydration and hydrothermal composition. With the extension of constant temperature time, more and more hydrates gather, and the strength increases faster and faster. But when the constant temperature reaches a certain time, the increase of intensity begins to slow down.
There is a constant temperature time corresponding to the different material ratio, different production process and the produced aerated block blank. For example, under the humid and hot conditions of 96-100 ℃, the constant temperature time is 8 hours in spring and autumn, 7 hours in summer and 10 hours in winter. In the cooling stage, when the output is large and the space of the maintenance room is not enough, the door of the maintenance room should be opened to cool down quickly, which will lead to the temperature difference stress between the surface of the tensile film body and make the surface layer tensile and easy to form microcracks. Therefore, it is necessary to control the cooling rate. The cooling rate every 30 minutes should not exceed 10 ℃; the temperature difference in the watch of the maintenance room should not be greater than 30 ℃, and the product can only leave the room after stretching the film.
In fact, the influence of the stretching film on temperature is very severe, which can not be ignored every time. Different temperature environment will affect its quality and application. Therefore, in order to ensure the later application, we need to control the environmental control. Content editor will share with you here, the content is only for your reference! If you need to know about stretch film or purchase stretch film, for stretch film price consultation, welcome to inquire!
Shenzhen World Packing Industrial Limited
Top Stretch Wrap Film & Adhesive Tapes Manufacturer