What should be noted when using plastic woven bags
Most of the plastic woven bags in our daily lives are white. White woven bags are also a type of plastic woven bag. Compared to other colored woven bags, white woven bags have better quality.
Undoubtedly, woven bags have brought convenience to our lives, but assuming we are not careful about details during use, it will affect the quality of woven bags. So what details should be paid attention to when using it? Let's learn about it together in the following article.
Firstly, due to the large load-bearing capacity of plastic woven bags, the packaged products are generally heavy. Assuming a person cannot move or drag on the ground. Due to the conflict between woven bags and the ground, not only will the soil on the ground be carried into the interior of the woven bag, but the bag fibers may also crack, accelerating the rate of bag damage.
When using plastic woven bags to package products for long-distance transportation, it is necessary to cover some waterproof cloth or other moisture-proof cloth on the woven bags to prevent direct sunlight and rainwater corrosion, and accelerate the aging rate of the products.
Beer wrap and heat shrink film manufacturers commonly use PE shrink film, PVC shrink film, PP shrink film, POF co extruded shrink film in the market. In the family of heat shrink packaging films, POF three-layer co extruded heat shrink film is a new generation product that has gradually emerged and been accepted by people in recent years. The main component of heat shrink film for packaging beer is a single-layer environmentally friendly toxin detection type heat shrink packaging material produced by co extrusion blow molding process using PE as the main raw material.
The drying process of PE protective film adhesive refers to the process of evaporating the solvent or moisture in the adhesive layer coated on the substrate to cure the adhesive. Due to the time required for solvents or water to evaporate, drying is a relatively slow step in the production process of protective films. The drying speed not only determines the production speed but also greatly affects the quality of the product.
Once the adhesive of the PE protective film is applied, the solvent will quickly evaporate before entering the drying oven. However, due to the heat absorption caused by evaporation, the surface temperature of the adhesive layer decreases, resulting in a decrease in evaporation rate. When the protective film enters the oven, the heat absorbed by solvent evaporation is supplemented by the heat conducted from the outside. When the heat reaches equilibrium, the surface temperature of the adhesive layer and the evaporation rate of the solvent can also remain constant.
The viscosity and other rheological properties of PE protective film adhesive are also factors that affect the coating process of protective film. The greater the deviation of the rheological properties of the adhesive from Newtonian fluid, the more likely various quality problems are to occur during the coating operation, especially when the adhesive exhibits the properties of an expanding body. Due to the rapid increase in viscosity with the increase of coating speed during the coating process, a large mechanical force is required to unfold the adhesive. Therefore, the faster the coating speed, the less likely it is to obtain a uniform coating.
