Apple's standard for purchasing fruit bags

Apple's standard for purchasing fruit bags
First, the type of bag
1, paper bag
(1) Double-layer paper bags: There are three types: one is a Japanese bag; the other is a Taiwan bag, and an imported bag such as a South Korean bag; and the third is a domestic bag represented by "Dian Da". The difference and quality of domestic bags and imported bags are getting closer and closer. Double-layer paper bags can be divided into one-time removal and two-time bag removal. Double-layer bag with one-time removal, the inner bag is black, and the inner and outer bags are glued together; the double-layered paper bag with two sexes is different in color on both sides, the outer layer is mostly grayish white, the inner surface layer is black; the inner layer bag is divided into wax coating and Super calendering, generally red, the inner coat is not sticky, suitable for red varieties, the fruit of the double-layer paper bag is delicate, the base color is white, the color is bright and uniform, and it can be exported or supplied to the high-end market.

(2) Single-layer paper bag: divided into blackout bag, wood pulp primary color bag and book newspaper bag. Single-layer shading bag, suitable for the production of high-end red varieties, the effect is worse than double-layer paper bags; wood pulp primary color bags, suitable for non-red apple varieties (used in pears, peaches, grapes, etc.). In order to prevent fruit rust and improve the smoothness of the fruit surface, a single-layer paper bag can be selected, which is lower in cost and relatively higher in efficiency than the double-layer paper bag. The book newspaper bag is generally used by the fruit farmers for self-use, which can prevent the pollution of the liquid medicine and prevent pests and diseases.

2, plastic film bag
It is a unique creation in China. The advantage is that the bag price is low, which can effectively prevent rotten fruit disease and heartworm, and does not need to remove the bag when harvesting, the internal quality of the fruit is high, and the disadvantage is that the appearance quality is not as good as the paper bag fruit.

Second, the quality requirements of the bag
High quality fruit bags are the basis for successful bagging. It is necessary to purchase a fruit bag with a registered trademark, a high-quality brand name, a manufacturer's guarantee, and a good local application.

(1) Paper bag: Double-layer paper bag requires the outer bag paper to withstand wind, sun, rain, good breathability, no water seepage, good light-shielding, soft paper, good glue at the bottom of the mouth, good quality of the inner bag. Evenly waxed, not easy to wax after sun exposure; the mouth of the bag should be tied, the inner and outer bags are separated from each other. The identification method is: first look at whether there is a trademark manufacturer; second, look at the water resistance and air permeability of the paper bag. Good paper bags soaked in water for more than 8 hours, not easy to break; three look at the paper bag specifications. The preferred paper bag size is 19.5 cm x 15 cm for the outer bag and 16.5 cm x 14.5 cm for the inner bag. Fourth, look at the appearance quality of the paper bag, do not open the glue, do not drop the wire, the vent hole, the drainage port is moderate.

(2) Plastic film bag: It is required to use polyethylene micro film with anti-aging agent, anti-causal agent, pest repellent, according to scientific formula, bag length 19.5-21 cm, width 16-17 cm, thickness 0.005-0.006 cm Each bag weighs 36-40 grams; the upper mouth of the bag is fully open or half sealed, and there are three 2-3 cm drain holes at the bottom and the middle of the bag. There are several venting holes on the bag, and the bag mouth is easy to open. Paste the fruit surface, the thickness is even, and the anti-aging time is more than 5 months. Years of trials have shown that translucent milky white bags have the least amount of sunburn.

Third, choose the bag
According to the characteristics of the above different fruit bags, combined with different apple varieties and production purposes, the desired fruit bags can be determined.

1. Choose bags according to market demand. The premise of bag selection is to look at the needs of the market, and advocate the whole garden, the whole tree, the whole fruit bagging, the high-grade fruit set good bag, the mid-range fruit set mid-range bag, and the general fruit set low-grade bag. In order to produce export fruits, it is necessary to use brand-name double-layer paper bags; to produce superior grade fruit, you can use medium-grade double-layer paper bags; to produce first-grade fruit, low-grade double-layer paper bags, single-layer paper bags and plastic film bags are available. If the cultivation conditions, technical level and economic ability are poor, the plastic film bag and the single-layer paper bag can be sleeved.

2, look at the variety of bags. Golden and green apple varieties such as golden crowns do not need to be colored. The purpose of bagging is to improve the smoothness of fruit surface and prevent fruit rust. It should be matched with plastic film bags and plastic film bags; Qinguan apple can be plastic film bags; The red variety, such as the new red star apple should be combined with the single-layer shading bag and the plastic film bag; the red Fuji apple with more difficult coloring should use high and middle-grade double-layer paper bags, and the single-layer shading bag combined with the plastic film bag. . On a red Fuji apple tree, the top and bottom of the canopy, the best strong fruit double-layer paper bag on the sunny side, the single-layer shading bag with direct sunlight in the south and southwest direction, the inner crown of the canopy and the lower back of the canopy A full set of plastic film bags.

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