The utilization of recycled plastic will be improved in 2014.

The utilization of recycled plastic will be improved in 2014.

Currently, recycled plastics plastics industry has become a new trend in China, but there are some difficulties in obtaining recycled plastic, the quantity is still limited, but if every member of the supply chain can cooperate with each other, the use of recycled plastic in packaging industry will be increased in 2014.

Recycled plastics has great environmental advantages compared to conventional plastics.For example, energy demand of recycled polyester is lower 2/3 of virgin polyester, and reduce sulfur dioxide 2/3 and the nitrogen dioxide 1/2, water consumption is reduced by 10 times as well, while there is no need for garbage landfill treatment of virgin plastic. Recycled plastic has become the development trend of the industry.

Through technical innovation and industrial restructuring products, recycled plastic industry has made great progress in China, the direction is toward high-quality, multi-species, high-tech development, recycled plastics market environment has the early scale. In the textile, automotive, food and beverage packaging, electronics and other fields can be seen recycled plastic figure. In addition, a city daily consumption of plastic food bags and other plastic products amounted to 10 tons or more, there are a large number of rural recyclable waste plastics, China has formed a number of large-scale plastics recycling old trading center gathering and processing, recycled plastic industry outlook promising.

Of course, the recycled plastics industry is still in the development stage, there are still some problems. Due to extensive plastic renewable sources, including plastic film, plastic packaging, plastic containers, household plastic products, PP bags(or PP woven bags), plastic, wire, etc., of varying quality, in a unified process of recycling plastic, may be due to differences in raw materials, lead to a new product there is a big difference in
performance between batches. In addition, recycled plastics production chain is more complex due to the higher production costs, resulting in the price of 30% -50 % higher than virgin plastic prices, I believe that with the further development of technology, production prices will gradually decline.

Champoux consulting pointed out in the "2013-2017 China recycled plastic sheet market research report analyzes and development prospects": Recycled plastic has not been re-considered inferior product made ​​only as scrap or downgrade directly, although there poor stability, but because of its environmentally
friendly natural advantage, this makes it more and more popular, recycled plastics is becomming a treand of plastics industry.

Corona treatment of the surface of the plastic film.

Corona treatment of the surface of the plastic film.

Plastic films are often used as the liner of PP woven bags or PP bags, it's easy to create static friction when filling the goods in, then need to do a corona treatment, in corona treatment process, the base voltage is high enough to move the discharge action material (sheet or film) surface. When the film is generally carried out while the pre-treatment film to the film containing an anti-static agent and other additives, it is an advantage of this treatment. Film extrusion, before the storage process found on the film surface bloom additives, which make it difficult to achieve uniform treatment.

A method by which to make the thin film go through the two electrodes, wherein a high voltage is connected to the metal sheet, a high frequency motor. The other is the ground roll, separated by a narrow gap to the high voltage electrode. Metal electrode film to be processed should be more than a little  narrower, to prevent the discharge directly to the roller. Ozone generating discharge, the surface oxide film, it has polarity. The treatment level is determined by the motor output power and the extrusion speed.

Should avoid dealing with inadequate or over-treatment-which will make the surface chalking, brittle, difficult to heat sealing. Poor treatment effect over time, the treated surface treatment and cleaning of sensitive. Corona treatment at atmospheric pressure and high temperature work, and therefore, there will be very severe surface oxidation.

To determine whether the film is treated or not, a simple test method is to flow water through the surface of the film. If the film is not treated, the water will flow away, and after the liquid film will be processed for several minutes. In between these two extremes, there is often a portion of the film processing good, bad adhesion of the two places, so this method is only suitable test for determining whether the treated surface of the film, but can not be measured through the process.

This primitive improved peel adhesion test method was tested using the roll is pressure -sensitive adhesive tape in particular on the film surface, and then measuring the peel strength of the tension. The higher the treatment level, the higher the peel strength.
The surface chemical changes occur can be detected by XPS technique out, XPS can identify the presence of a corona discharge treatment on the polyolefin hydrocarbon, an ether group, an ester group, a hydrogen peroxide group, an aldehyde group, a carbonyl group or a carboxyl group.

Polyester (PET) bags, a new woven packaging bags.

PET is polyethylene terephthalate. It's a plastic resin and the most common type of polyester. Two monomers-modified ethylene glycol and purified terephthalic acid-are combined to form the polymer called polyethylene terephthalate. PET was discovered and patented in England in 1941.Polyester is
obtained by polycondensation of polyhydric alcohols and polybasic acid polymer in general. Mainly refers to polyethylene terephthalate (PET), the habits, including polyethylene terephthalate, polybutylene terephthalate (PBT) and poly aromatic esters and other linear thermoplastic resin. Is a kind of high performance, versatile engineering plastics. Also be made of polyester fibers and films.

A Chinese company used a special plastic timber (PET) as the material of woven bags which stirred the whole plastic woven bags industry. After six years of research, this company invented the special material for the production of raw materials woven ( has obtained national patents,as well as many countries and regions applied through PCT). The company introduced: The traditional woven polypropylene and polyethylene are used as a raw material, and the company developed special material is old as raw material bags. And this is extremely rich in raw materials, low prices, it 's the performance exceeded the performance of the current bags, but also greatly reduces the cost of raw materials.

This performance than woven polypropylene bags of superior performance, can be explained by the following points:

1.The tensile strength is 1.5 times that of polypropylene woven bags. The bulk bags could also be used as the material for high-intensity needs.
2.Transparency, gloss higher than polypropylene bags, feel very wide, flat and smooth surface. For the production of transparent bag.
3.Good temperature resistance, can reach 140 degrees. Duration of 48 hours, does not change its properties.
4.Toughness than polypropylene bags, no crack in the weaving of silk.
5.Anti-aging, 2 times that of polypropylene bags, can be used to produce tarpaulin and lawns.

Some experts predict: World production of woven polyethylene bags industry first, and then the production of PP woven bags(also know as PP bags) enhance product quality and applications, and polyester (PET) production of woven bags will surely elevate again product quality and applications.

The key technology to produce polyester (PET) is the equipment bags, with equipment of any enterprise can produce woven polyester (PET) bags. Recently

learned that domestic production of such equipment manufacturers, many years ago on the production of such equipment and exported to foreign countries.

Drying and storage of grain.

It’s important to care the drying and storage of grain.

When grain is stored on the ground, earth is crowned under the pile to aid in drainage. A vapor barrier, is also placed on the ground to keep ground moisture from wetting the grain. Check grain temperature and moisture. If the pile is on well-drained, gravel-covered soil, the vapor barrier probably isn't necessary.
If you are going to largely manage to fill each store with dry grain there's a reluctance to put in small pockets of relatively much wetter grain. This in ability to cut small amount of wet grain can cause significant delays. For example, suppose that you are close to finishing a farm and rain comes before you finish the last 10ac. You then have 10ac or so to cut before moving the combine and it's not feasible to come back for it at a later date. Suppose, also, that a day arrives where grain moisture hovers around 19-20% with the prospect of good fine dry weather from that day on wards. At the moment we would wait until the day after, cut the 10ac, and then spend a hour or so moving, which is an hour or two of wasted combining in good conditions. If a grain pile is covered, plastic tarp is generally adequate, although covering large piles of grain can pose a challenge. Whether the pile is covered or not, the top surface should be smooth in order to aid drainage. The cover should be placed to carry water away from the grain. Aeration helps control any condensation that might occur under the plastic cover.

Try to design the building so that it has a natural airflow. Make sure the building exterior is well-drained, weather-tight, rodent-proof and not physically damaged by the forces of the grain. If you detect any problems, correct them immediately. If necessary move the grain to a different storage facility.You can set up a thermal chimney to use solar energy to get the air moving. You can also use a double skin wall made of steel sheeting to use solar heat to help dry the crop. Once it is dry, then you can use a hermetically sealed bag or bags for longer term storage, but it must be dry before you seal the bags otherwise you will get moud and the crop will be destroyed. Don't assume that you can use standard kit from Europe or the USA. Much of this depends on reliable electricity supplies and that is something you probably don't have. If a drying fan stops due to a power cut in the middle of the drying process, it will cause real problems. Its vitally important to get things right.

What additives are usually used in plastic packaging bags?

In order to improve the performance of plastic bags, it need to add some additives its stability during the production process,commonly used additives are the following:

Heat stabilizer, can improve the thermal stability of the plastic material,then can improve its adaptability to different temperatures.

Plasticizers,can improve toughness and ductility of the packaging bags, not easy to be shredded.

Anti-static agents, on the surface properties of the bag make improvements to prevent the generation of static electricity.

Colorant,can change colors, improve the appearance, at the same time improving its optical properties.Wide variety of coloration products for packaging applications.Suitable for long-term coloration and visual appeal.

Anti-oxidants,can prevent the occurrence of aging and prolong bag's life.

Anti-scratch additives,are capable to bind effectively to the polymer matrix and to avoid migration.

Master batch fillers, effectively reduce production costs of plastic bags by filling in the material.

Additives help to improve surface properties of polymers like scratch resistance and surface smoothness. Higher output and better processing of compounds can easily be achieved by applying processing aids.Packaging is also an essential element of content protection, in particular for food and beverage,for example,flour is always packed in PP woven bags(or named PP bags).Therefore, packaging materials do contribute to aesthetic enhancement, convenience-in-use functionality, content protection and preservation and low additional costs for mass production.

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