Composite extrusion began to appear in the 1960 s has been 40 years of history, especially since the 1980 s, in Europe, America, Japan and South Korea, composite extrusion has been in a high-speed development stage.
At present, in the United States and Europe, composite extrusion accounted for about 50% of the flexible packaging, particularly in Japan and Korea reached 70%.
Composite extrusion product covers almost all of the packaging;
, beverage, medicine, food, daily chemical products, protective film, protection film, even aerospace products, etc. , we all use dry type composite products in foreign countries are using composite extrusion, dry after not the toothpaste tube, aluminum composite paper-plastic products, aerospace products are also using composite extrusion, because abroad in extrusion composite resin, process, equipment, all aspects of the in-depth study and continuous innovation, composite extrusion is moving towards a higher level, become the mainstream the development of flexible packaging.
Composite extrusion in China compared with advanced countries, the development level of difference (
In most domestic equipment production speed is 100 m/min, width 1250 mm;
And the American equipment production speed of up to 800 m/min, width 1650 mm)
。
At present our country accounted for about 25% of the flexible packaging composite extrusion products, and most of the packing of the products is low.
Composite extrusion tortuous development course in our country is mainly decided by our national conditions: 1, money problems: flexible packaging enterprises in our country, the scale is compared commonly small, limited funding.
Domestic composite extrusion machine performance is not enough, can only buy imported, and JinKouJi tens of millions of yuan price is unsustainable, and therefore can only give up composite extrusion, to purchase dry compound machine;
2, composite extrusion product performance: packaging in our country have long stressed, strength and stiffness of the composite extrusion has obvious disadvantages in this respect.
In the 1990 s, the peel strength of the composite extrusion is in commonly 0.
6 n / 15 mm or so, only use pure LDPE extrusion for internal heat sealing layer, heat sealing strength, low tensile strength, thin film is more soft.
In recent years, with the innovation of extrusion compound process, peel strength, heat sealing material has made changes, heat sealing strength greatly increased, the tensile strength is increased, in addition to the stiffness, other aspects has basically reached the level of dry type composite.
3, dry compound solvent residues are present serious flaws, in the national standard of our country also has a regulation, but the index and require far abroad, but also can take only some large enterprises of solvent residue detection and control, most of the small and medium-sized enterprise has no testing.
Actually, these toxic substances harmful to human body harm is great, especially of
food packaging, is a large part of children's food, children's long-term eating food containing poisonous and harmful material packaging, great harm to their health.
At present, the personage inside course of study has started to pay attention to these problems, composite extrusion because without solvent residual, health performance is better, so more and more be taken seriously.
4, extrusion composite materials: petrochemical enterprise production technology in China, not in the production of special extrusion composite resin.
Like the EAA, EEA and EMA thermal bonding resin can't manufacture, composite extrusion with PP resin also failed to put into industrial production, even common LDPE resin performance is not very stable, the gap between batch and batch is bigger.
In recent years, the petrochemical enterprises and scientific research units to strengthen research, the problem of resin in solution (
At present the most main is imported, imported raw materials type)
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Changzhou food packaging material manufacturer co. , LTD. (
Hereinafter referred to as & other;
Changzhou food packaging manufacturer & throughout;
）
Osmanthus road 28 - is located in changzhou city, jiangsu province bell tower area
No. 2, is a company specializing in the production of supply composite bags, composite membrane, food packaging bags, aluminum foil bag, vacuum bag manufacturers.
Food packaging factory through the ISO quality management system certification, QS certification and BRC certification, has perfect testing equipment and advanced laboratory, all of this provides high quality products with strong guarantee.
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