How to make powder-free PE plastic bags easy to open

PE plastic bags are widely used and produced on a large scale in the market. The production process of seemingly simple PE plastic bags is not simple. To make powder-free, easy-opening PE plastic bags, attention must be paid to various related processes. Below, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will share its experience in producing powder-free, easy-opening PE plastic bags to explain the production process of PE plastic bags.

I. Film Blowing Process

1. Raw Material Ratio

According to the various requirements of PE bags, different proportions of raw materials are formulated. For example: anti-static, anti-rust, antioxidant, conductive, biodegradable, etc., various auxiliary additives are added. Different grades of PE materials are changed according to different requirements such as transparency, toughness, tear strength, vacuum, etc.; according to special requirements, emphasizing high transparency, high tear strength, powder-free, and good opening properties, the proportions of various raw materials are changed.

2. Electronic Treatment

In the film blowing process, those that need to be printed must be electronically treated. At this time, attention should be paid to the intensity of the electronic treatment to ensure that the electronic treatment strength (dyne value) of the PE plastic bag tube material is sufficient to ensure ink adhesion.

3. Special Requirements

During the film blowing process, various different operations such as single-side opening, double-side opening, folding, point-breaking, embossing, and inflation are performed according to the special requirements of the film material.

II. Printing Process

1. Printing Ink

Different ink properties such as water-based ink, quick-drying ink, invisible ink, color-changing ink, anti-counterfeiting ink, induction ink, conductive ink, low-electron ink, and matte ink are selected according to the corresponding ink.

2. Printing Plate

According to the fine requirements of the printing content, the rotogravure (copper plate) printing effect will be better.

3. Printing Method

Select single-color printing, single-color double-sided printing, single-sided multicolor printing, and double-sided multicolor printing according to the fineness and complexity of the printing content.

4. Special Requirements

According to the special requirements of the printed pattern, different inks or additives are selected for color change, anti-counterfeiting, conductivity, and anti-adhesion.

III. Bag Making Process

1. Bag Type

According to the type of PE plastic bag, it is divided into gusset bags, flat bags, irregular bags, three-dimensional bags, vest bags, self-adhesive bags, wire bags, roll bags, handle bags, etc. Different types use different bag-making machine models, and the methods and auxiliary tools used are also different.

2. Special Requirements

Destructive adhesive strips need to be added to PE self-adhesive bags; glue needs to be applied to PE bags; card heads need to be added to PE bags; point-breaking needs to be added to PE bags; air vents need to be punched in PE bags, etc., using various different auxiliary tools.

3. Packaging Requirements

According to the different packaging requirements of customers, different packaging methods are used, such as: cannot be disassembled, carton packaging, packaging in a specific quantity, packaging in a specific way, etc.