How to distinguish whether the plastic packaging bag is PE or PVC material?_ Guangdong Zhongxing Plastic And Paper Printing Co.,Ltd

How to distinguish whether the plastic packaging bag is PE or PVC material?

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We all know that there are many kinds of materials for plastic packaging bags, but the most common materials are PE and PVC. PE plastic packaging bags are mainly made of polyethylene, which has excellent low temperature resistance, good stability, and can withstand the erosion of most acids and alkalis. PVC plastic packaging bag is mainly made of polyvinyl chloride resin as the main raw material, which is a kind of plastic bag processed with PVC film. It has the characteristics of light weight, heat insulation, heat preservation, moisture resistance and flame retardant. So how do we distinguish whether the plastic packaging bag is PE or PVC? There are mainly the following 4 methods. Identification method:

1. Touch method

When you touch the surface of plastic packaging bags, generally PVC plastic bags are sticky and astringent, while PE plastic bags are milky white, translucent and smooth to the touch.

2. Jitter method

You can shake the packaging bag with your hands. If it can make a crisp sound, it is usually a PE plastic bag; if the sound is small and dull, it is a PVC plastic bag.

3. Combustion method

If conditions permit, the method of burning can also be used to identify PE and PVC materials. Generally speaking, the flame is blue, the upper end is yellow, and the paraffin odor when burning is the PE plastic packaging bag; it is difficult to burn, the flame is yellow, the upper end is green, and the pungent hydrochloric acid odor is the PVC plastic packaging bag.

4. Immersion method

First immerse the plastic packaging bag in water, press it into the water by hand, the PE plastic that can surface, and the PVC plastic that sinks to the bottom (the density of the PE plastic packaging bag is lower than that of water, and the density of the PVC plastic packaging bag is higher than that of water; normal temperature are about 0.92g/cm3 and 1.4g/cm3 respectively).

Regarding the question of how to identify whether the plastic packaging bag is made of PE or PVC, today's Zhitu packaging? The editor will introduce it here. I believe that through these four methods, it can help everyone quickly identify the material of the packaging bag.

The biggest difference between digital printing and traditional printing

The biggest difference between digital printing and traditional printing is that it saves the process of producing film and printing PS version, and directly completes the printing process from computer to paper. Its imaging principle is also different from offset printing. It is suitable for small batches, personalized prints. As few as a few, as many as a hundred. If you want to have several books that belong to you, such as souvenir albums, travel notes, photo albums, etc., digital printing is the most economical and ideal method. The working principle of the digital printing machine is that the charger charges a layer of electric charge on the surface of the recording drum, and the dot matrix information of the content (such as characters) to be printed by the printer controller is reflected on the surface of the charged recording drum in the form of a laser beam, so as to put When the recording drum rotates to the toner cartridge, the electric charge in the position where there are printing dots will attract the toner. When the recording drum with the toner shape is rotated to the rotating When the printing device is placed, the printing paper is between the recording drum and the transfer device, and the stronger reverse charge added to the transfer device will attract the toner with the font on the recording drum to the printing paper, and the heating part will The toner on the paper will be coagulated and dried, and the fonts on the printing paper will be kept firmly, and the printing process will be ended. There are three printing scales for digital printing: A4 (297mm×210mm), A3 (420mm×297mm) and SRA3 (450mm×320mm). Digital printing is suitable for printing paper with a thickness between 80g and 250g. Digital printing is suitable for a variety of documents, in addition to professional manufacturing software, work software and even print drafts can be used. Of course, the most standard is to provide electronic files in PDF format, which will make the printing process convenient and accurate. Digital printing can do: immediate waiting, copies are abnormal.

What is the difference between "pvc" and "pe"?

1. Application Polyethylene (PE) applications: plastic wrap, vest-style plastic bags, plastic food bags, pails, water bottles, etc. Polyvinyl chloride (PVC) applications: plastic wrap, plastic shoes and leather products, films, cables, plastic bags. 2. Features Polyethylene (PE) has a waxy texture to the touch, is lighter in weight and has a certain degree of transparency compared to the same plastic. Polyvinyl chloride (PVC) characteristics: hard plastic, commonly used in industrial fields.

The difference between PVC material and PE material, and the use of each material

1. Differences in application; Polyethylene (PE) applications: plastic wrap, vest-style plastic bags, plastic food bags, pails, water bottles, etc. Polyvinyl chloride (PVC) applications: plastic wrap, plastic shoes and leather products, films, cables, plastic bags. 2. Different characteristics; Polyethylene (PE) has a waxy texture to the touch, is lighter in weight and has a certain degree of transparency compared to the same plastic. Polyvinyl chloride (PVC) characteristics: hard plastic, commonly used in industrial fields. 3. Differences in material properties; Polyethylene, referred to as PE. It is a polymer of ethylene and is non-toxic. Easy to color, good chemical stability, cold resistance, radiation resistance, good electrical insulation. It is suitable for packaging materials for food and medicine, making tableware, medical equipment, and insulating materials for the electronic industry. Polyvinyl chloride, referred to as PVC. It is a polymer of vinyl chloride. Polyvinyl chloride (PVC) is a synthetic material with many advantages and is an ideal material for engineering plastics. Good chemical stability, acid and alkali resistance. Moisture resistance, aging resistance, flame retardant.

Is Polyethylene Toxic?

"Polyethylene itself is non-toxic. Polyethylene is mainly divided into high-density polyethylene, low-density polyethylene and linear low-density polyethylene. The surface of polyethylene is dull, milky white waxy granular, corrosion-resistant , the water absorption is relatively small, and the electrical insulation is relatively high. It is mainly divided into two production processes: high-pressure tube method and kettle type. It is mainly used for agricultural film and industrial packaging film products."

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