September 17, 2019
What is the valve bag and what are the characteristics of the valve
Valve bag is a small bulk packaging container, which is convenient,
clean and well sealed. It is one of the most popular packaging forms
in the world. It is a new type of environmental protection packaging
product, especially suitable for export packaging.
When used, the material can be fed from the top or bottom valve ports,
and special filling equipment is adopted. After filling, the shape of
the body is formed, and the packing is neat and beautiful.
Valve bag features: Valve bag has the characteristics of improving
packaging efficiency, convenient transportation, strong firmness, low
breakage rate and so on.
Valve bag classification: Valve bags can be divided into the following
categories according to the material used:
valve bag is made of plastic woven bag (abbreviated as base cloth) and
tape casting method (cloth/film/paper composite is three in one).
Kraft paper valve bags are made of kraft paper. (Kraft paper is mainly
divided into imported kraft paper and domestic kraft paper.) The
number of layers of kraft paper varies from one layer to six layers
according to its use, and can be coated or added with PE plastic film
in the middle.
PE valve bag: commonly weighing bag valve bag, made of
polyethylene film, the thickness of the film is generally between 8
and 20 wires.
Low melting point valve bag: made of low melting point polyethylene
film. The thickness of the film is generally between 8 and 20 wires.
It is suitable for large-scale production in the pipeline of chemical
enterprises. It can reduce pollution and labor intensity of workers.
Composite valve bag: It is a new type of material with printability of
paper and moisture resistance and firmness of plastics.
Printing of valve bags: generally one to four colours, up to eight colours.
valve bag filling process