Influence of the hottest circulation process on pa

  • Detail

The influence of circulation process on packaging quality

the quality of packaging not only depends on the production of packaging containers, but also will be directly affected in the circulation process of use, protection, handling, storage and so on. These factors are often ignored in practice

I. Problems in the use of packaging

1. Filling contents

when filling contents, many people think that the more the better, ignoring the expansion coefficient of the contents of the package. For example, the down jackets exported by a foreign trade company to Kazakhstan are produced in winter. When packing, the down jackets are packed with a packer, but they are not included in the industry standard jc/t building thermal insulation aluminum alloy profile standard After the tensile strength and shear strength values are specified, the goods are packed into cartons in full load. After a few months, the goods are transported to the port. It is hot weather, and the contents expand violently after heating, which makes the square cartons look like leather balls. Some cartons are seriously damaged, causing the goods to be unable to be exported normally and detained in the port warehouse

whether filling solid or liquid, the expansion coefficient of the contents should be considered in the process of packaging selection, design and use. After filling, a certain space should be left in the container to ensure that the thermal expansion of the contents will not cause the change of packaging quality or the overflow of the contents. Especially when filling liquid, it should be filled to less than 98% of the total volume

2. Sealing

no matter which type of package is used, it should be sealed correctly. Improper packaging and sealing will cause the quality change, pollution, leakage, etc. of the contents, and even cause malignant accidents. For example, in 1987, China exported a batch of yellow phosphorus (a spontaneous combustion substance, which is required to be soaked in water during transportation). Due to improper sealing, the water leakage of the packaging barrel caused the spontaneous combustion of yellow phosphorus in the barrel, and the whole ship caught fire, causing heavy losses. Another example: 2. The speed of the digital display model produced by Jinan Sida is 1mm/min~500mm/min. A batch of sodium hydroxide exported in 2001 was packed in plastic woven bags. The sealing line used in sealing was polyester line. After a few days, the contents reacted with the sealing line, and the sealing line was burnt out. Before the goods were delivered, the contents were leaked in the warehouse

such things that cause economic losses due to improper packaging and sealing occur from time to time. Although there are requirements for packaging and sealing in some product standards, the author consulted most product standards and relevant materials, and the requirements for packaging and sealing are not detailed or easy to operate. Packaging and sealing is also one of the problems that are easy to be ignored

-- for barrel packaging, the barrel mouth parts should be closely matched with the barrel mouth, and equipped with appropriate sealing rings. The tightness shall meet the sealing requirements. The spanner hoop also needs a pin to lock the spanner

-- bag packaging, regardless of the use of rope binding, bonding, heat sealing, stitching, must ensure that the contents are free of leakage, there is no gas in the bag, and the selected rope or thread does not react with the contents

- hold the 6th and 7th Sino German intelligent manufacturing standard working group meetings - for box packaging, if wooden boxes or fiberboard boxes are used, the seals should be fastened with iron nails or U-nails, which should be firmly nailed, and no riser is allowed. The box should be tightened with packing bands. If cartons, calcium plastic boxes, etc. are used, they shall be sealed with self-adhesive tape not less than 5cm wide, with a drooping length not less than 5cm, and the box shall be tightly hooped with packing tape

II. Problems in protective packaging

there are many forms of quality changes in the circulation of goods, including physical changes, chemical changes, physiological and biochemical changes, and so on. In order to prevent the changes of commodities in the circulation process, protective measures are often taken on the packaging. The common protective packaging includes: waterproof, moisture-proof, mildew proof, rust proof, insect proof, shock proof, bacteria proof, antimagnetic, radiation proof, etc

improper use of protective packaging will also cause economic losses or quality accidents. For example, a batch of porcelain tableware exported to the CIS in 1995 was not suitable for long-distance transportation because the shockproof packaging (buffer packaging) was unqualified, the size of shockproof material was too small and the selected material was too thin. Porcelain tableware collided with each other during transportation, and the damage rate of this batch of goods reached 30% after arriving at the port, which was rejected by foreign businessmen. Another example: in 1998, a mechanical and electrical company imported 15000 sets of bearings from France. Due to unqualified waterproof and rust proof packaging, water flowed into the box during transportation. After arrival, 4162 sets of bearings were seriously rusted and could not be used. It can be seen that protective packaging is an indispensable and important part of commodity packaging, and we should pay attention to it. First, we should take into account various factors in the circulation of goods, and choose appropriate protective packaging to truly protect the contents. Second, protective materials (such as adsorption materials, liner materials, etc.) cannot have chemical reactions or other adverse reactions with the contents. Third, protective packaging should be operated according to the procedures

III. problems in the handling of packaging

1. Problems in loading and unloading

"rough loading and unloading" is still relatively prominent. The author has witnessed for several times that packaging container manufacturers carefully package and load their own products such as treasure. In order to prevent collision, wrap it with blanket liner and wrapping paper. However, after being transported to the using enterprise, it is another scene. The stevedores roll down from the car more than 4 meters high, and some even "pedal with one foot", and there are no protective measures on the ground. The paint film of the steel barrel falls off, the barrel body is deformed, the cartons are unpacked, the corners are rolled over, holes are broken, pollution and so on are unbearable. These packages have not been used and are beyond recognition, which will directly affect the image and quality of goods. After the filling of the contents, especially the collective packaging of 200 liter barrels or pallets, the forklift is used for handling or loading and unloading. The driver's quality awareness is weak, the operation technology is not up to standard, and accidents such as collision and overturning occur from time to time, causing serious damage to the packaging. This requires enterprises to strengthen the management of loading and unloading personnel, strengthen their quality awareness, formulate corresponding procedure documents, and take appropriate protective measures to avoid or reduce the damage to packaging in the process of loading and unloading

2. Problems during transportation

carelessness during transportation will also cause damage to the packaging. First, the unclean means of delivery caused packaging pollution. If the carrier is not cleaned in time after carrying coal, chemical fertilizers, pesticides and other substances, it will cause damage or pollution to the goods transported again. Second, without tarpaulin during transportation, it will cause rain and sun exposure, which will also cause package damage, discoloration, aging, etc. during transportation, especially long-distance transportation, tarpaulin must be covered to prevent rain and sun exposure. Third, the packaging damage caused by improper loading methods, such as ① the loading of goods is not true, and there is a gap between goods, causing mutual collision and friction between goods during transportation. ② The inversion of the loaded goods causes the liquid leakage of the contents and soaks and pollutes other packages. ③ The improper stacking of goods on the means of delivery makes the bottom layer of goods overloaded, resulting in package damage. In addition, during the transportation of goods, there are also vibrations from vehicles such as cars, trains, ships, planes, etc., and corresponding measures must be taken

IV. problems in storage

1. Open storage

open storage of goods may cause the following losses: paper packaging mildew and damage; The paint film of steel drum packaging falls off and rusts; Discoloration and aging of plastic packaging; The wooden package is dry and cracked. For example, in May, 2001, 2000 plastic woven bags produced by TSH plastic products Co., Ltd. were intended to be loaded with emery for export. After being transported to the platform, they were stacked in the open air on the platform for more than 2 months due to delayed shipment. When the goods were ready for shipment, it was found that the packaging was seriously damaged due to aging caused by exposure to the sun. Another example: in August 2000, hundreds of tons of ketchup produced by th tomato products Co., Ltd. were filled and stacked in 200 liter open steel barrels in the open freight yard. Due to market reasons, this batch of goods was delayed until May of the next year, and the paint film of the outer packaging barrel seriously faded to the sunny side, some of the paint film fell off, and the barrel body was rusted. The reason is that the company violated the GB standard and piled the goods in the open air for a long time without taking any protective measures. Therefore, the commodities stored in the open air must take corresponding protective measures against rain and sun. Avoid long-term storage of goods in broad daylight

2. Stacking

most goods are stacked during storage. Improper stacking methods will cause serious damage to the packaging, such as water immersion, mildew, corrosion, damage, etc. Nanfang Daily reporter xieqingyu huangyingchuan intern Fang can should consider many factors when stacking. First, when stacking, it should be padded 10 ~ 20cm off the ground for waterproof and ventilation. Second, whether one-to-one vertical stacking or cross stacking is adopted, uniform stress distribution should be considered. Third, in order to prevent collapse and skid resistance, tarpaulins, wrapping paper, wood boards, etc. should be padded between layers. Fourth, the stacking height should be controlled at an appropriate height according to the pressure that the package can bear, the convenience of handling and the size of the site. The maximum is no more than 8 meters, and it is the easiest to control within 3 meters

in addition to the above four aspects of the impact of the circulation process on the packaging quality, there are also related factors such as the temperature and humidity of the environment, the circulation time, the mode of transportation, the chemical and physical properties of the contents, etc. the situation is relatively complex. We must carefully study all factors and take corresponding measures to avoid and reduce the impact of the circulation process on the packaging quality

Copyright © 2011 JIN SHI