Application of HDPE film in the field of packaging
DATE：2019/6/21 11:36:25 / READ： / SOURCE：This station
Application of HDPE film in the field of packaging
1) HDPE is one of the most widely used and widely consumed products in the packaging field. One of the reasons for the rapid growth in recent years is the rapid increase in supermarkets and retail goods. Compared with LDPE, HDPE micro-thin film has high strength and good tensile properties. The film with the same strength can be thinner than LDPE, so it can reduce raw material consumption and reduce cost. At present, the LDPE film packaging market is increasingly being replaced by HDPE film. In addition, HDPE has excellent oil and defense
Water, moisture resistance, high heat seal strength, good opening, and suitable for printing, etc., usually used as food packaging bags, general shopping bags and garbage bags.
2) In addition to the manufacture of various film bags, HDPE can also replace cellophane for candy packaging. Such as uniaxially stretched HDPE film for twisted packaging, which has good transparency, gloss, kink fixation, decoration, oil resistance, moisture resistance to packaging machinery and printing machine, etc., is used instead of cellophane One of the more suitable materials for candy packaging.
3) HDPE film is widely used in the preservation of fruits and vegetables. In the process of packaging fruits, it is usually sealed with a single piece of HDPE film and sealed with a hair dryer to make the HDPE film adhere to the surface of the fruit. Leave no gaps, or soak the fruits and vegetables for 24h with 1000mg/kg carbendazim and 250mg/kg solution. After the HDPE sealing treatment, the tangerines and sweet oranges are stored in the normal temperature store for more than 6 months, and the fresh-keeping effect is very good. They still have good color, aroma and taste, and fresh vegetables are kept fresh, with emphasis on inhibiting harvest. After the water evaporation and respiration of vegetables, HDPE film is used to package fresh vegetables for hibernation storage, which can prevent the reduction of freshness caused by evaporation and water loss, such as reducing the quality and inhibiting the breathing of vegetables, delaying the loss of ingredients and ripening, thus preserving Role, and the persimmon storage period can be as long as
46d (days), lotus root 25d.
4) HDPE has good heat resistance. After modification, it can be used as a sealing layer in the retort pouch of PET/AI foil sealing layer structure. This retort pouch can be sterilized at a temperature of 121-134 °C.
5) There is also a longitudinal and transverse tensile cross-composite film, the inner layer is a transversely stretched HDPE film, the outer layer is a longitudinally stretched HDPE film, and the middle layer is an adhesive. The cross-composite film can be used as a heavy packaging bag. Under the strength, the thickness can be reduced by half compared with the LDPE heavy-duty bag, and the elastic modulus is doubled, and the stiffness of the kraft paper can be packaged at temperatures up to 100 ° C. Currently, the bag has been used for sugar, salt, It can be used as a container bag, etc.
6) The application of HDPE fertilizer packaging bags is also an important aspect. In the past, chemical fertilizer packaging used polyethylene film single packaging. In the late 1970s, the outer polypropylene woven bag and the inner low-density polyethylene film double-layer packaging began. In the 1980s, HDPE inner pockets were used to replace LDPE bags.
1) HDPE is one of the most widely used and widely consumed products in the packaging field. One of the reasons for the rapid growth in recent years is the rapid increase in supermarkets and retail goods. Compared with LDPE, HDPE micro-thin film has high strength and good tensile properties. The film with the same strength can be thinner than LDPE, so it can reduce raw material consumption and reduce cost. At present, the LDPE film packaging market is increasingly being replaced by HDPE film. In addition, HDPE has excellent oil and defense
Water, moisture resistance, high heat seal strength, good opening, and suitable for printing, etc., usually used as food packaging bags, general shopping bags and garbage bags.
2) In addition to the manufacture of various film bags, HDPE can also replace cellophane for candy packaging. Such as uniaxially stretched HDPE film for twisted packaging, which has good transparency, gloss, kink fixation, decoration, oil resistance, moisture resistance to packaging machinery and printing machine, etc., is used instead of cellophane One of the more suitable materials for candy packaging.
3) HDPE film is widely used in the preservation of fruits and vegetables. In the process of packaging fruits, it is usually sealed with a single piece of HDPE film and sealed with a hair dryer to make the HDPE film adhere to the surface of the fruit. Leave no gaps, or soak the fruits and vegetables for 24h with 1000mg/kg carbendazim and 250mg/kg solution. After the HDPE sealing treatment, the tangerines and sweet oranges are stored in the normal temperature store for more than 6 months, and the fresh-keeping effect is very good. They still have good color, aroma and taste, and fresh vegetables are kept fresh, with emphasis on inhibiting harvest. After the water evaporation and respiration of vegetables, HDPE film is used to package fresh vegetables for hibernation storage, which can prevent the reduction of freshness caused by evaporation and water loss, such as reducing the quality and inhibiting the breathing of vegetables, delaying the loss of ingredients and ripening, thus preserving Role, and the persimmon storage period can be as long as
46d (days), lotus root 25d.
4) HDPE has good heat resistance. After modification, it can be used as a sealing layer in the retort pouch of PET/AI foil sealing layer structure. This retort pouch can be sterilized at a temperature of 121-134 °C.
5) There is also a longitudinal and transverse tensile cross-composite film, the inner layer is a transversely stretched HDPE film, the outer layer is a longitudinally stretched HDPE film, and the middle layer is an adhesive. The cross-composite film can be used as a heavy packaging bag. Under the strength, the thickness can be reduced by half compared with the LDPE heavy-duty bag, and the elastic modulus is doubled, and the stiffness of the kraft paper can be packaged at temperatures up to 100 ° C. Currently, the bag has been used for sugar, salt, It can be used as a container bag, etc.
6) The application of HDPE fertilizer packaging bags is also an important aspect. In the past, chemical fertilizer packaging used polyethylene film single packaging. In the late 1970s, the outer polypropylene woven bag and the inner low-density polyethylene film double-layer packaging began. In the 1980s, HDPE inner pockets were used to replace LDPE bags.
Author：admin