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The Woven Bag Is Widely Used In Industry
- Jun 07, 2017 -

Woven bags, also known as snakeskin bags. Is a kind of plastic, packaging, and its raw materials are generally polyethylene, polypropylene and other chemical plastic raw materials.

Weaving density refers to the number of 100mm × 100mm knitted fabric, the number of latitude and longitude yarn. The national standard GB / T8946-1998 stipulates that "the bag is flat, Woven Bag in the bag on the next two diagonally delineated 100mm × 100mm two blocks, the square outside the bag and the edge of the line away from 100mm, visual box by the number of latitude , The average value, when the count when the last point less than one, according to a meter. "National standards in the provisions of the weaving density at the same time, the provisions of the density tolerance. The weaving density depends primarily on the packaging product, which is determined by the user.

raw material

Plastic woven Glossary: woven bags mainly speaking: plastic woven bags are polypropylene (English name pp) as the main raw material, the extrusion, stretching into flat yarn, Woven Bag and then by weaving, preparation, bag made of.

parameter

Commonly used woven bag density is 36 × 36 root / 10cm ², 40 × 40 root / 10cm ², 48 × 48 root / 10cm ².

1. Weave density tolerance.

The weaving density tolerance refers to the number of strands that are more than the given standard weaving density or less.

2. Weaving bag unit area quality.

The weight per unit area of the woven bag is expressed in terms of the weight of the square meter, which is an important technical index of the woven bag. The weight of the square meter mainly depends on the weft density and the thickness of the flat yarn, the square meter weight affects the tensile strength of the woven bag, Woven Bag the load capacity, the square meter weight is the production enterprise control cost is a main link.

3. woven bag tensile load.

Tensile load, also known as tensile strength, tensile strength. For the woven bag to bear the warp and weft direction of the tensile load in two directions, Woven Bag so that the warp, zonal tensile load.

4. Width.

A variety of woven bag width directly affect the bagging process. Woven Bag For the tube cloth with a fold that the width, folding is equal to half the circumference of the circle.

Width of the width of all woven bags woven after the width of the volume, in the exhibition volume cutting, printing, sewing, made of the width of the bag should be slightly smaller than the width of the coiling, we call the width of retraction.

5. feel.

PP flat woven fabric feel more thick, very wide, rough some.

HDPE flat woven fabric feel soft, smooth, not dense.

In the PP flat wire material to add calcium masterbatch, feel very wide, PP less HDPE will make it more soft.

Flat wire narrow, weaving flat, soft to the touch, wide wire width, woven bags folded when the silk, feel rough.

species

Foreign production of raw materials for the polyethylene (PE), the main domestic production of polypropylene (PP), ethylene is produced by polymerization of a thermoplastic resin. Also included in the industry are copolymers of ethylene with minor amounts of alpha-olefins. Polyethylene odorless, non-toxic, feel like wax, with excellent low temperature performance (minimum temperature up to -70 ~ -100 ℃), good chemical stability, the ability of most of the acid-base erosion (intolerant with oxidative properties Acid), which is insoluble in general solvent at room temperature, has low water absorption, and has excellent electrical insulation performance. However, polyethylene is very sensitive to environmental stress (chemical and mechanical action) and has poor heat aging resistance. Woven Bag The properties of polyethylene vary depending on the variety, depending on the molecular structure and density. The products of different densities (0.91 to 0.96 g / cm3) can be obtained by different production methods. Polyethylene can be processed by general thermoplastics molding methods (see plastic processing). Widely used, mainly used to manufacture thin films, containers, pipes, monofilament, wire and cable, daily necessities, and can be used as television, radar and other high-frequency insulation materials. With the development of petrochemical industry, polyethylene production has been developing rapidly, the output of plastic production accounts for about 1 / 4. In 1983 the world's total polyethylene production capacity of 24.65Mt, under construction capacity of 3.16Mt.

The use of woven bags is very wide, mainly used for a variety of items into the packaging and packaging, widely used in industry;

Plastic woven bags are polypropylene resin as the main raw material, the extrusion, Woven Bag stretching into flat wire, and then by weaving, made of bags.

Composite plastic woven bag is a plastic woven bag as the substrate, made by the casting method.

For the packaging of powder or granular solid materials and flexible items. The composite plastic woven bag is divided into two kinds of bag and triple bag according to the main material.

Woven bags according to the sewing method is divided into sewing bottom bags, seam bottom bags, plug bags, adhesive sewing bags.

Woven bags according to the effective width of the bag is divided into 450,500,550,600,650,700 mm, special specifications agreed by the supply and demand sides.

As a result of product resources and price problems, China has 6 billion woven bags for cement packaging, accounting for more than 85% of bulk cement packaging.With the development and application of flexible container bags, plastic woven bag is widely used in the sea, In the packaging of agricultural products, plastic woven bags have been widely used in aquatic products packaging, poultry feed packaging, farm cover materials, crop cultivation shade, wind, hail shelters and other materials. Common products: feed Woven bags, chemical woven bags, putty powder woven bags, Woven Bag urea woven bags, vegetable mesh bags, fruit mesh bags, and so on.

Woven bag is a very wide range of products, weaving bags wholesale price is the focus of attention, but the quality is fundamental, the quality of woven bags affected by the great impact of raw materials, the following we have to look at the details of the raw material mixing process.

For the mixing of raw materials mixed with recycled bag particles, you need to first add the feed particles into the dry mixer for mixing. Recycled material particle mixing temperature is controlled at 80 ℃, to the temperature set when the number of cooling in the mixing box. And then add the new material into the dry mixer to stir the temperature to 500 degrees, add the filler to continue mixing, the masterbatch into powder. Need to add colored pigments in time to add the required coloring pigments, stirring about lmin release in the mix box with the recovery of particles to stir evenly. However, if the recovery of raw materials need to add paraffin wax, then the first recovery of material particles to about 70 degrees, the paraffin treatment into a small piece of people continue to stir.

For the raw material is powder mixed with the receipt of particles, you need to mix the feed particles to about 70 degrees before adding the filler to continue mixing, to the temperature set when placed in the mixing box and the subsequent release of the powder to stir evenly stand-by. These different raw materials on the wholesale price of woven bags have no small impact, so consumers in the purchase of products or when more attention to quality.