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The function and requirement of compound layer of compound packing bag

Categories: Company NewsRelease time: 2018-12-10 17:25:00 RSS subscription Font size:【 Large Middle Small

Composite packaging bag with a typical three-layer structure composite soft packaging materials as an example, the role of the outer substrate (surface layer) and requirements are shown in the table below

 
 
Outer substrate action
 
 
Required action
 
 
Mechanical strength tensile, tear resistance, impact resistance, friction resistance
Moisture resistance, gas resistance, incense protection, uv protection
Stable to light, oil, organic matter, heat and cold
Machinability friction, thermal shrinkage and crimp
Health and safety low taste, low odor, non-toxic
Other gloss, transparency, shading, whiteness, printability
 
 
The most important requirements for the outer material of composite packaging bags are high strength, good abrasion resistance, good luster, heat resistance, good barrier and good printing adaptability. The requirements and functions of intermediate layer materials (functional layer) are shown in the table below
 
 
Intermediate substrate action
 
Required action
 
Mechanical strength tensile, tensile, tear and impact resistance
 
Barrier water, air, incense
 
Machinability double-sided composite strength
 
Other transparent, avoid light
 
The most important requirement of composite packaging bag for the middle layer material is that it has certain strength, friendly barrier and double-sided compound. Requirements and functions of inner layer materials (sealing layer) are shown in the table below
 
Inner layer (seal layer) function
 
Required action
 
Mechanical strength tensile strength, impact resistance, pressure resistance, puncture resistance
 
Barrier fragrance, low adsorption
 
Stable to water, oil, heat, cold and stress cracking
 
Machinability friction coefficient, thermal viscosity, anti - sealing pollution, non - crimp
 
Health and safety low taste, low odor, non-toxic
 
Other transparency, non - transparency, anti - seepage, easy to tear
 
 
After fully understanding the requirements of customers, the functional design and mechanism design of composite packaging bags can be ca

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