What causes the deformation of the chemical plastic barrel when it is used

- May 23, 2020-

Mentioning the relevant knowledge of chemical plastic barrels, I believe that everyone is not unfamiliar, and its content has been described a lot in the above articles, but as a professional user, just mastering this knowledge is not enough. To further promote the user's understanding, the outstanding characteristics of the transparent raw materials used by the professional staff for their chemical plastic barrels are summarized as follows: The transparent chemical plastic barrels must first have high transparency, and secondly have certain strength and wear resistance, which can resist impact , The heat-resistant parts are better, the chemical resistance is better, and the water absorption rate is smaller. Only in this way can it meet the requirements of transparency and remain unchanged for a long time. In addition, during the use process, this chemical plastic bucket will also encounter common The problem is that the transparent plastic has a high light transmittance, which inevitably requires strict surface quality of plastic products. There must be no streaks, pores, or whitening. Haze, black spots, discoloration, poor gloss and other defects, so the raw materials and equipment are used throughout the injection process. The design of molds and even products must pay great attention and put forward strict and even special requirements. Transparent chemical plastic barrels must first have high transparency, followed by certain strength and abrasion resistance, impact resistance, heat resistance parts, chemical resistance, water absorption rate, and only then can it be used in To meet the requirements of transparency and not change for a long time, the following table lists the performance of pmma, pc and pet. Due to the variety of varieties, this is just an average, and the actual data for different varieties are different. The pet data (mechanical) is the data after stretching. 

In the process of use, this kind of chemical plastic buckets will also encounter common problems. Transparent plastics must have strict surface quality requirements for plastic products due to the high light transmittance. They must not have any markings, porosity, or whitening. Haze, black spots, discoloration, poor gloss and other defects, so the raw materials and equipment are used throughout the injection process. The design of molds and even products must pay great attention and put forward strict and even special requirements. Secondly, since most transparent plastics have high melting point and poor fluidity, in order to ensure the surface quality of the product, it is often necessary to make fine adjustments in process parameters such as high temperature, injection pressure, injection speed, etc. Will cause internal stress and cause product deformation and cracking.

The production of each product has its own application, and the plastic barrels for chemical industry we are talking about today are no exception. Their application can be used to set up liquids that will produce chemical reactions. At this time, we should do first. Take good precautions to confirm its response and whether it can withstand its temperature. Chemical plastic barrels can usually be equipped with liquids. At room temperature, salt, alkali, and other mixtures are no problem. Plastic barrels for chemical industry cannot be used to install strong oxidizing liquids. For example, sulfuric acid with a temperature higher than 60 degrees and a concentration higher than 75%, concentrated nitric acid higher than 30%, etc. In addition, the production of plastic barrels for chemical industry can also be used for the storage and transportation of various liquids. It has good characteristics for special dangerous goods packaging. It has the characteristics of not brittle, rust, light weight, etc., and is resistant to oil and strong It has excellent corrosion performance, and is mostly used for packaging dangerous goods that require heat insulation, moisture resistance, pressure resistance and corrosion resistance. It is precisely because it has such a wide range of application fields that it can have such a good development prospect.

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