A recent AMI report states that heavy plastic bags are expected to account for nearly 60% of market share by 2020 and continue to make progress in plastic bag manufacturing and will further expand market share such as cement, food and pet food package.
Heavy duty bags are usually bags that can hold up to 25 kg of product. In 2010, when the number of heavy plastic bags exceeded that of paper bags, the share of plastic heavy bags has risen to nearly 55% and is expected to reach nearly 60% by 2020.
Plastic heavy-duty pouches have better "stacking capabilities" such as reducing storage space and shipping costs compared to upright and woven bags; plastic heavy-duty pouches are lighter than alternative pouches and therefore can significantly reduce the carbon footprint of the package .
In addition, plastic heavy-duty bags are 100% recyclable compared to plastic-lined paper bags and have a 100% sealing capacity for dust-free handling without spillage or waste.
The new law is more powerful
There have been some new technologies on the market in recent years, such as Starlinger's IC * STAR bag, which incorporates a new method for sealing polypropylene (PP) bags jointly developed with Statec Binder.
Unlike the stitching method, IC * STAR solves the sealing tape by hot air at the bottom of the bag in a continuous process without the use of adhesives. The structure of IC * STAR also virtually eliminates the need for stitching bags The wider width of the bag and the higher strength at the bottom of the bag allow the use of lighter weight fabrics, a combination of these two factors that reduces the cost of raw materials (in this case PP) and reduces the carbon footprint.
This method of closure allows the bag to be completely sealed, which is an important advantage, especially in the case of fine powder products that are dusty when packed through pinholes and, in some cases, may be hazardous to health.
The oil-free production process also makes it particularly suitable for packaged foods such as rice, coffee, salt, sugar or flour.
The plastic bag mouth remains open and, after automatic filling, can be sealed or stitched with another closure bar.
The IC * STAR bag is produced on the multilin KX Starlinger sack production line with the seal TEC bottom seal module developed by Starlinger and Statec Binder. The sealTEC module requires less maintenance than the sewing machine and requires replacement parts and The parts are much less coated and uncoated IC * STAR bags can be produced using this new method.
Production speed and then upgrade
In terms of production speed, Windmöller & Hölscher (W & H) notes that its new Conver Tex CL 140 machine far surpasses the backschill speeds of all other heat-sealed backpacks in the market. The first machine was commissioned in July 2016 To date, 24 hours of continuous production per day and 140 pieces of 65 g PP cement bags per minute have been produced.
The Conver Tex heat-sealed PP backpack eliminates the need for binders in this type of bag Over the past 10 years the backfill production has more than doubled: from 60 bags per minute up to 140 per minute .
With new technology, lighter plastic items can be processed into high-quality bags.
This new technology from Weide Hall, known as LS (Lighter & Stronger), high quality PP film with toughness of up to 7 g / den, coupled with micro-perforation index technology, can reduce 15 g or 20 for the production of cement bags weighing 65 g %the weight of.