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BOPP 珠光膜

BOPP 珠光膜 BOPP 珠光膜 BOPP 珠光膜 BOPP 珠光膜
产品名称:BOPP 珠光膜
产品编号:3919109900
详细说明:
 BOPP white opaque film (BOPP pearlized film)  pearlBOPPfilm

Pearl film in the actual selection process, a particulate CaCO3 masterbatch uniformly dispersed in the homopolymer PP to form many holes when the PP stretching, it is these holes refract light to form a pearl effect. BOPP film has a white pearl pearl color, can reflect more light, and its gas barrier properties, water blocking BOPP film than other varieties of fine.
Pearl BOPP film applications
Thickness of 35μm-sided sealing type BOPP pearl film can be directly used ice cream, ice cream and other cold drinks packaging, can also be used for candy pillow packing, chocolate, soap protective packaging. The thickness of the double-sided sealing BOPP pearl film 30μm widely used in biscuits, sweets, candy, snacks and other packaging.

Principle pearl BOPP film
Pearl film is incorporated pearlescent pigment in the plastic particles produced out of a two-way stretch after heat setting BOPP film. A typical use of BOPP film is a pearl pearl film A / B / A3 layer co-extruded biaxially stretching method of production, in which B is a pearlescent blended masterbatch polypropylene, A is a pearl film with surface properties vary the PP copolymer, having good heat sealability. Biaxially stretched at below the melting point the material B, A be the material above the melting point.
Since B inorganic compound containing more pearlescent pigment particles, the result is a two-way stretch: Polypropylene molecules were oriented along the direction of the external force, and the distance between the pearlescent pigment granule pulled a large, void formation, the B-layer into a mechanical foaming foams. Therefore, pearl film A / B / A structure is a two-way stretch foam BOPP film, BOPP film than the average proportion of small, only 0.7 to 0.75, while the average proportion of BOPP film is about 0.9.
A material layer pearl BOPP film has the effect of protecting B material layer, and gives the film a certain degree of heat sealing pearl, so pearl film A / B / A sealing structure is good. And only B material produced pearl film, the film can only rely on porosity and small amounts of non-oriented PP molecules slight heat sealing, heat sealing the film after pearl tear easily be peeled off.
Pearl BOPP film performance parameters

Item  Single-digit  Test Method  Target range  

Thickness: μm 22um-120um
Density   g / cm3  
GB / T 6343
22um-50um  ≤0.70  
70um-120um  ≤0.62
 
Tensile  Strength
MD
MPa
GB / T 13022
≥75
TD
≥140
Gloss 
%
GB / T 2410
≥50
Heat seal strength
MPa
ZBY28004 / 86
≥1.5 (35μ or less)
≥1.8 (35μ-40μ)
≥2.0 (40μ more)
Surface
Tension
Single surface
mN / m
GB 12026
38
Duplex
35 Face / main surface 38
Whiteness %
GB / T 2913
≥85
Corona treatment values
mN / m---≥38

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