The raw material
Plastic woven bag mainly speaking: plastic woven bag is polypropylene (English name pp) as the main raw material, by extrusion, stretch into flat silk, and then by weaving, weaving, bag.
The commonly used woven fabric density is 36 36 /10cm²
40 x 40 root / 10 cm & sup2;
48 x 48, root / 10 cm & sup2;
1. Weaving density tolerance.
The braided density tolerance refers to the number of flat threads more or less than the given standard braided density.
2. Quality per unit area of woven cloth.
The unit area weight of woven fabric is expressed in grams per square meter, which is an important technical index of woven fabric.
The gram weight per square meter mainly depends on the density of warp and weft and the thickness of flat silk.
3. Tensile load of woven fabric.
Tensile load is also called tensile strength, tensile strength.
For braided booker, the tensile load in both warp and weft directions is called warp and weft tensile load.
4. The width.
The width of woven fabric directly affects the bag-making process.
For tube fabric with folded width, folded is equal to half of the circumference.
The width retraction rate, the width of all woven fabric after winding, after rolling cutting, printing, sewing, the width of the bag is slightly less than the width when rolling, we call width retraction.
PP flat silk fabric feel thicker, quite wide, thick and hard.
HDPE flat wire fabric feels soft, smooth and not dense.
Add calcareous masterbatch in PP flat silk makings, feel is quite broad, add HDPE to make it less in PP some of softness.
Flat silk narrow, flat knitting, soft to the touch, flat silk width, woven cloth when folded silk, rough feel.
A thermoplastic resin prepared by polymerization of propylene.
There are three configurations of isotactic substance, irregular substance and interspecific substance. Industrial products are mainly composed of isotactic substance.
Polypropylene also includes copolymers of propylene and a small amount of ethylene.
Usually translucent colorless solid, non - toxic odor.
Because of its neat and high crystallization structure, therefore, melting point 167 ℃, heat resistant, products available steam sterilization is its outstanding advantages.
Density 0.90g/cm3, is the lightest universal plastic.
Corrosion resistance, tensile strength 30MPa, better strength, rigidity and transparency than polyethylene.
The disadvantage is low temperature impact resistance, easy aging, but can be modified and added antioxidants to overcome.
The color of woven bag is generally white or off-white, non-toxic and tasteless, which is generally less harmful to human body. Although it is made of various chemical plastics, it is more environmentally friendly and has a larger recycling capacity.
Woven bags are widely used, mainly for packaging and packaging of various items, and are widely used in industry.
Plastic woven bag is made of polypropylene resin as the main raw material, extruded, stretched into flat silk, and then woven and bag-making.
Composite plastic woven bag is made of plastic woven cloth as the base material by the method of flow.
Used for packing powder or granular solid materials and flexible articles.
Composite plastic woven bags are divided into two - in - one bags and three - in - one bags according to the main material composition.
According to the sewing method is divided into seam bottom bag, seam side bottom bag, pocket, adhesive sewing bag.
According to the effective width of the bag, it is divided into 450, 500, 550, 600, 650 and 700mm. The special specifications are agreed by the supplier and the supplier.