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1. The importance of easy opening
The easy opening of packaging is one of the additional packaging functions that has become increasingly prominent as the market competition has intensified. How to provide consumers with thoughtful services has long been of concern to various manufacturers. For some areas (such as daily chemical products), the basic performance difference of various brand products is very small. It has become more and more difficult to compete with the market by simply relying on the performance of the products themselves. Effective competitive tools.
The appearance of small packaging is the result of market demand. It can provide consumers with simple, easy to carry, and moderately sized products. It is more suitable for travel, compared with large packaging, large weight, heavy carrying, and large amount of packaging. A small amount of food and beverage environment. For small packages, easy opening and sealing are two outstanding features. Easy opening is a magic weapon for small packaging to be favored by consumers.
Bag-shaped wrappers and bottle-shaped wrappers are the two most common forms of wrappers and are used in many areas of daily life, such as food packaging, pharmaceutical packaging, and daily chemical packaging.
2. Analysis of the easy opening of bag-shaped packaging
Bag-shaped packaging in the form of small packages has certain requirements for easy opening, such as facial tissue, small packaging of food and granules, puffed food (bag) packaging, instant noodle (bag) packaging, and various daily chemical packaging, etc. . The opening can be opened according to the easy opening provided by the edge of the bag (generally at the heat seal), or peeled off from the heat seal at one end of the bag, or opened with other tools such as scissors. Obviously, for small packages, it is ideal to open the package conveniently without the aid of additional tools, so that the small package can be easily carried and ready for use.
2.1 Easy opening at the heat seal
It is the most convenient way to open according to the easy opening of the edge of the bag. The easy opening of the triangle is the most common. This method has a small opening force and a short opening time. It is conceivable that if the easy opening of the bag is not able to achieve the desired opening effect, it will have a great impact on the image of a brand. Therefore, the packaging bag needs to be subjected to tearing and surface friction coefficient of the packaging material. The indicator is tested to ensure the opening effect when opening from the easy opening. The tear degree is the main indicator related to whether the package is easy to open, and whether the friction coefficient is reasonable is the main influencing factor to whether the surface of the material can be gripped by the consumer during the process of tearing the material. The amount of tearing force of the packaging material directly represents the force required by the consumer to open the package. Generally, this value should be appropriately selected so that the consumer can open the package without much force. Because the clamping force provided to the material during the tear test is large enough, there is no "slip" of the material during the test, but if the consumer actually opens the package, if the friction of the material surface The size and the tearing force of the material are not well matched. It is also common to open the slip phenomenon when the grip strength is not large enough to cause difficulty in opening. In the design of the package, the two indicators of the packaging material need to be comprehensively considered, and the simulation test under various grip conditions is carried out.
2.2 Peel off at the heat seal at one end of the bag
It is also a common way to open the heat seal at one end of the package. The primary requirement for heat sealing is better sealing, as the seal is the most prone to leaks. Common heat sealing methods include heat sealing rod sealing and electric sealing, different packaging materials, and different sealing methods. The opening at the heat-sealing end refers to an opening method of the heat-sealed end sealed by a heat-sealing rod, and an easy-opening effect can be achieved by using an easy-opening material, for example, an easy-opening material is commonly used for chocolate packaging.
The easy-opening film is a heat-sealable film, generally adopting a multi-layer composite structure. After the film is heat-sealed, the sealing has good sealing performance, and can effectively prevent leakage of contents and contamination of contents by external substances during storage and transportation of the product, and is convenient when the product needs to be taken out. The joint is peeled off. The selection of the heat-sealable layer of the easy-opening film is crucial for the performance of the easy-opening film, and a special adhesive or a special formulation can be used. In order to ensure the convenience of opening at the heat sealing end, it is necessary to control the heat sealing strength of the material within a reasonable range, and also consider the surface friction performance of the packaging material.
3. Analysis of easy opening of bottle-shaped packaging
Bottle-shaped packaging is widely used in beverage packaging, pharmaceutical packaging, cosmetic packaging, etc. Its packaging materials are mainly divided into three categories: paper-plastic composite materials, plastics, and glass. According to the different sealing methods, it can be divided into two types: bottle cap sealing and heat sealing. The corresponding opening mode mainly includes opening the cap and opening from the heat seal of the container mouth.
3.1 Open the cap
The cap-sealing bottle needs to be opened by opening the cap to achieve the opening of the package. Whether the bottle cap is easy to open can directly affect the consumer's confidence in a brand and affect the consumer's repurchase. Especially for casual drinks, if the opening force is too large, it will not meet the leisure style. At present, the opening of small packaging containers is mainly based on manpower, so the control of the opening strength is even more important. The index that indicates the opening force value of the cap is the torque force. The torque force is too large to bring the opening and locking of the cap. The torque is too small and will give the product transportation, display, and contents. Protection has an impact. The same as the tearing force of the test bag, the detecting device also provides sufficient clamping force to ensure the bottle body does not slip when detecting the opening and locking force of the bottle cap, so the surface of the container should be comprehensively considered in the design. Friction performance and opening force of the cap.
3.2 Open at the heat seal of the container mouth
Heat-sealed bottles are commonly used in coffee, jelly, and instant noodle packaging. The main way to open this package is to open it from the seal. Since the use of other opening methods may have a certain influence on the use of the contents of the heat-sealed packaging container, the application of the easy-opening material on such packaging containers is very extensive. Similar to the heat seal opening of the package, the heat seal strength between the material and the container, the friction coefficient of the material and the friction coefficient of the container wall should be comprehensively considered, and the test under various grip conditions should be simulated.
4, summary
The easy opening of the package can be considered by the test of tearing performance, friction performance, heat sealing performance and torque force. Of course, some information about the sales target must be added at the time of design. If the designed packaging is used for children, it is necessary to measure the size, shape, capacity, opening force, and related structure of the handle according to the strength of the child so that the child can be effective. Use the package.