Definition of woven bag
Release time:
2023-09-06
The national standard GB/T8946-1998 stipulates that "the bag shall be flattened, and two squares of 100mm × 100mm shall be circled at the upper and lower diagonals of the bag. the outer edge of the square shall be 100mm apart from the edge line of the bag. the longitude and weft number of the squares shall be visually inspected and the average value shall be taken. when counting, when there is less than one ending point, it shall be counted as one." The national standard specifies the density of weaving and the density tolerance. The weaving density mainly depends on the packaging product and is determined by the user.
Raw material
Explanation of plastic woven terms: woven bags are mainly concerned: plastic woven bags are made of polypropylene (English name pp) as the main raw material, extruded and stretched into flat wire, and then woven, woven and made of bags.
Parameters
The commonly used woven fabric density is 36 × 36 pieces/10cm, 40 × 40 pieces/10cm, 48 × 48 pieces/10cm.
1. Weaving density tolerance.
Braiding density tolerance refers to the number of flat filaments that are more or less than a given standard braiding density.
2. Mass per unit area of woven cloth.
The weight per unit area of woven cloth is expressed in terms of the weight per square meter, which is an important technical index of woven cloth. The square meter gram weight mainly depends on the warp and weft density and the thickness of the flat wire, the square meter gram weight affects the tensile strength of the woven cloth, the load capacity, the square meter gram weight is a major link in the cost control of the production enterprise.
3. Woven cloth tensile load.
Tensile load is also called tensile strength, tensile strength. The woven Booker bears the tensile load in both the warp and weft directions, so it is called the warp and weft tensile load.
4. Width.
The width of various woven fabrics directly affects the bag making process. For cylinder cloth, the width is expressed by the folded longitude, which is equal to half of the circumference of the circle.
The width shrinkage rate, the width of all woven fabrics after weaving and winding, after cutting, printing and sewing, the width of the bag made should be slightly smaller than the width of the winding, which is called width shrinkage.
5. Feel.
PP flat silk braid feel thick, quite wide, hard some.
HDPE flat silk braid feel soft, lubrication, not dense.
Adding calcium masterbatch to PP flat wire material has a wide hand feeling. Adding less HDPE to PP will make it softer.
The flat wire is narrow, the woven is flat, the hand feels soft, the flat wire is wide, the folded wire is more when weaving the cloth, and the hand feels rough.
Previous: What are the classification of bags?
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The national standard GB/T8946-1998 stipulates that "the bag shall be flattened, and two squares of 100mm × 100mm shall be circled at the upper and lower diagonals of the bag. the outer edge of the square shall be 100mm apart from the edge line of the bag. the longitude and weft number of the squares shall be visually inspected and the average value shall be taken. when counting, when there is less than one ending point, it shall be counted as one." The national standard specifies the density of weaving and the density tolerance. The weaving density mainly depends on the packaging product and is determined by the user.
Due to product resources and price problems, China has 6 billion woven bags for cement packaging every year, accounting for more than 85% of bulk cement packaging. With the development and application of flexible container bags, plastic woven container bags are widely used in marine, transportation and packaging of industrial and agricultural products. In the packaging of agricultural products, plastic woven bags have been widely used in aquatic products packaging, poultry feed packaging, covering materials for farms, sunshade for crop planting, windproof, hail shelter and other materials. Common products: feed woven bags, chemical woven bags, putty powder woven bags, urea woven bags, vegetable mesh bags and other fruit eye bags, mesh bags
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