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.