Coating compound production line
DATE：2021/5/12 9:17:09 / READ： / SOURCE：This station
Coating compound production line
Practical plastic packaging products manualProcessed meat and poultry include sausage, bacon, smoked meat, luncheon meat and processed poultry. Compared with fresh meat and poultry, these products are sold in smaller quantities. The central packaging of processed meat needs barrier packaging materials, which can prevent the discoloration and deterioration of oxygen- like The transmittance of oxygen should be 0.2ml/645cm2 . 24h.0.1MPa, Below 50% R.H. The oxygen permeability of PVDC coated cellophane developed and produced in 1950s is 1ml / 645cm2. zero Under 1mpa.24h, this material can be used in automatic packaging machine, which can save the cost of distribution chain from food factory to retail store and ensure the quality better. However, cellophane is brittle at low temperature and lacks pinhole resistance. Compared with plastic, cellophane is more expensive. Since 1960s, cellophane has been gradually replaced by plastic. The first was the use of cellophane / plastic laminates, which were soon replaced by cheaper all plastic. Coating compound production line www.handern.com
All kinds of processed meat have the following requirements for packaging materials.
(1) The effect of oxygen resistance on the quality of salted meat Frankfurter sausage and luncheon meat are fast food, and they are required to have a shelf life of more than 60 days. Therefore, they must have good oxygen resistance, heat seal must be reliable, vacuum packaging, and sometimes gas filling packaging are used to improve the shelf life and reduce the packaging cost;
(2) Transparent products must be visible to the buyers and can judge whether they are suitable or not. Therefore, transparency is very important;
(3) Excellent crack resistance Especially the cracking resistance at low temperature is more important;
(4) Products with excellent pinhole resistance There will be sharp corners, so pinhole resistance can prevent package cracking after falling（ 5) Good heat sealing property In the presence of fat and oil, it also has good heat sealing property and high thermal viscosity;
(6) Easy to open if production It is suggested that the packaging should be easy to open if the required oxygen resistance permits, so the use of easy to open structural materials should be considered at the expense of other properties;
(7) The packaging of reconstituted cooked food should have So it is important to restore the sealing performance after the package is opened. Coating compound production line www.handern.com
1. Packaging of Frankfurter
The horizontal molding filling heat sealing machine is used for packaging. The molding film is pulled into the mold cavity, and the vacuum is pulled down until it is consistent with the shape of the mold cavity. Then the top film is placed on the content and vacuumized for packaging. In this process, the product is in close contact with the packaging material to reduce the loss of moisture. The vacuum pumping must be well controlled to prevent the uneven surface of the packaging. The film is made of nylon 6 because of its good skin shape. The thickness of nylon 6 film is 0 025~0 The thickness of nylon 6 film is 0.025-0.05mm, and the top film can be nylon 6 or pet with the thickness of 0.025mm, which is coated by lamination or coextrusion. 05m lpbd was used as heat seal. If the printed rice film, pet is preferred, this material fresh period is 20 ~ 30 days ( Chapter 7 plastic packaging materials for various foods The fresh-keeping period of pork in the factory was 28 kg. Coating compound production line www.handern.com
Chemical treatment can reduce the growth of microorganisms and improve the fresh-keeping period. Beef is mostly packaged in 32kg. Studies have shown that different phosphate treatments can be used, and then put into EPS tray, and then polyolefin shrinkage agent can be used. For example, benzoic acid and citric acid can be used in the packaging of meat, which can be packaged into an inner package, and then the cover material composed of 0.5mm thick PRT heat sealing resin can be used in an appropriate proportion of Co, In thermoforming outer bracket, 0, 01mpet / o.08mmpe / double packaging system, with a fresh-keeping period of 14 days. In the super o: gas mixture gas heat sealing packaging, so as to form a supermarket, after the outer package is taken apart, it can have three days of preservation. Coating compound production line www.handern.com
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