What is the production method of paper-plastic composite bags?
Although the bag is an indispensable packaging products in modern production and life, but the performance of different types of bags is often different. But in the field of packaging bags is also the most popular and most prominent performance of the paper-plastic composite bags and plastic woven bag products. But for consumers it is often difficult to distinguish between the advantages and disadvantages. Here we take paper-plastic composite bag products as an example, Ningling Tim Goodwill Packaging Material Co.
Paper-plastic composite bags to our lives has brought a lot of convenience, paper-plastic composite bags are made of plastic and kraft paper composite and become, usually plastic layer of polypropylene or polyethylene as the substrate of the flat wire woven fabric, kraft paper is used in the refining of the composite special kraft paper, with high strength, waterproof good, beautiful appearance characteristics. It is one of the most popular packaging materials, widely used in plastic raw materials, cement, feed, chemical, fertiliser and other industries. However, in the reality of the production of paper-plastic composite bags on the production method of which are the most common, now there are small to introduce you one by one.
Dry composite method: dry composite method is also called dry lamination composite, the process is: in the base film coated with solvent-based adhesive, through the hot drying baking channel so that the solvent in the adhesive on the bonding layer of material completely evaporated, and then with the second layer of substrate by the heated and pressurised composite, total amount of composite not only suitable for composite between the plastic film is also composite between the and plastic film and aluminium foil, paper.
Hot melt composite method: this method is the hot melt adhesive heat dissolved into a flowing form after coating, and immediately pressure bonding other films for composite. Compared with dry lamination and wet lamination, its advantages are no need for hot oven drying, composite time is broken, energy saving, low cost, and no solvent pollution. Used in paper, plastic and aluminium foil, etc. Composite.
Coating method: This method refers to a method of coating the surface of the film with a fluid substance to form a tightly adherent skin film on the surface of the film. It can improve the film’s properties such as thermal adhesion, moisture resistance, gas insulation, ultraviolet absorption, and antistatic properties.
Wet laminating method: Wet laminating method is also called wet lamination laminating. The process is: the first layer of substrate surface coated with water-soluble or water-emulsion adhesive, in the wet state that is, with the second layer of substrate together through the composite device for extrusion composite, and then through the hot baking channel to remove solvents, so that the two layers of substrate composite together.
What is a three-layer kraft paper bag?
Before this we know the most is certainly a layer, we all know that kraft paper bags on our life to bring a lot of convenient places, environmental protection has a great help. Then we now come to understand what is different about the three-layer kraft paper bags and the characteristics of three-layer kraft paper bags.
Three-layer kraft paper bags are the latest generation of environmentally friendly materials, with waterproof, breathable, flexible, not easy to burn, non-toxic and non-irritating, colourful and other functional characteristics. The material’s ability to decompose by spontaneous combustion, if it is outdoors, the longest life is only 90 days, if it is indoors, it will decompose by spontaneous combustion within 5 years, there is another advantage is that it is non-toxic, odourless, and there is no substance left behind when burning, so it will not pollute the environment, so environmental protection is also derived from it.
Three-layer kraft paper bags are also widely used, according to the use of points, generally can be divided into leather, footwear with nonwovens, household decoration, home nonwovens, clothing with nonwovens, cloth packaging with nonwovens, industrial nonwovens, nonwovens for the defence industry, nonwovens for the automotive industry, nonwovens for the filtration materials, agricultural and horticultural nonwovens, as well as nonwovens used in other industries.
What are the characteristics of three-layer kraft paper bag products?
First, the quality is lighter. It is three-fifths of cotton, thin and light, with good fluffiness, and the feel is also quite good.
Second, soft. Composed of fine fibres, formed by point hot melt bonding, the finished product is soft to an appropriate degree.
Third, water pulling and air permeability. The products have good water pulling performance, composed of 100% fibre with many holes, the products have good air permeability, and it is easy to keep the cloth surface dry.
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