Heat shrinkable film fracture nominal strain test method

Heat shrinkable film fracture nominal strain test method

Abstract: In addition to shrink labels, heat shrinkable films are now also used in the outer packaging of everyday goods. Because it can protect the packaged goods from impact, rain, moisture, rust, and the product can win the user with a beautifully printed outer packaging, and it can show the good image of the manufacturer.

Today, more and more packaging manufacturers use printed shrink film to replace traditional transparent film. Because the printing shrink film can improve the appearance of the product, which is conducive to the advertising of the product, the trademark brand can make a deep impression on the consumer.

Keywords: heat shrinkable film heat shrinkable film heat shrinkable meter PE heat shrinkable film polyethylene heat shrinkable film

Reference standard: GB/T 13519-2016 "Polyethylene heat shrinkable film for packaging"

GB / T 1040.3-2006 "Plastics - Determination of tensile properties - Part 3: Test conditions for films and sheets"

Text: Polyethylene heat shrinkable film, also known as PE heat shrinkable film, is made of polyethylene resin as the main raw material, and the film is produced by one-time blow molding. It is widely used in the whole collection packaging of wine, cans, mineral water, various beverages, cloth and other products. The product has good flexibility , strong impact resistance, tear resistance, not easy to break, not afraid of tide, shrinkage rate. Big.

According to the scope of application, it is divided into two types: transverse shrink film and longitudinal shrink film.

The transverse shrinkage film is mainly used for the lateral shrinkage rate and is applied to the outer packaging of the outer packaging of the tray stacking articles or the shaped articles such as the carton;

The longitudinal shrinkage film is mainly used for the outer shrinkage of a fixed shape article, such as a monomer or a combination.

Of course, there are other types of shrink film in the industry, such as OPS/PVC/POF/PET .

PVC shrink film: high transparency, good gloss, high shrinkage;

POF shrink film: high surface gloss, good toughness, high tear strength and uniform heat shrinkage;

OPS shrink film: high strength, high rigidity, stable shape, and good gloss and transparency;

PET shrink film: the body is transparent, tightly packed, good anti-scattering, non-recoverable, and has certain anti-counterfeiting functions.

Heat shrinkable polyester film is often used in the convenience food, beverage market, electronic appliances, metal products, especially shrinkage labels are its main application areas. Because with the rapid development of PET beverage bottles, beverage bottles such as cola, sprite, and various juices require PET heat shrinkable film to be used as a heat seal label. They are all polyester-based, environmentally friendly materials, and easy to recycle. use.

The nominal strain of the fracture refers to the elongation of the packaging film before and after the break. Whether the material breakage value and the ductility of the material can be known by the test, and whether the damage problem occurs. Jinan Saicheng Instrument, XLW-PC intelligent electronic tensile testing machine , can meet a variety of physical performance testing, multi-range selection, fixture width optional, real-time data viewing and saving and other functions

Fracture nominal strain /%

Determination of tensile properties of plastics according to GB/T 1040.3-2006 . Part 3 : Test conditions for films and sheets . The width is 15 mm , the initial distance of the clamp is 100 mm , and the test speed is ( 500 ± 50 ) mm/min .

In addition to the nominal strain requirements for fracture, polyethylene heat shrinkable film also requires thickness, tensile strength, right angle tear strength, shrinkage, friction coefficient, light transmittance, wetting tension, heat sealing strength, impact resistance and other properties. For testing, if you need more equipment, please call Jinan Saicheng Electronic Technology Co., Ltd.

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