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What is PVDC?

PVDC, scientific name "polyvinylidene chloride", is a thermoplastic polymer with a softening temperature of 160~200 °C, with a linear polymer chain structure connected head to tail, symmetrical molecular structure and high crystallinity. For PVDC, due to its strong intermolecular cohesion and high crystallinity, the chlorine atom in the PVDC molecule is hydrophobic and does not form hydrogen bonds. Oxygen and moisture barrier properties, and its oxygen barrier properties are not affected by ambient humidity. That is to say, under any temperature or humidity conditions, PDVC has excellent ability to block water vapor, oxygen, odor and fragrance, currently recognized as the best plastic packaging material with comprehensive performance in terms of barrier properties.

Characters of PVDC

Polyvinyl chloride/polyvinylidene chloride (PVC/PVDC) pharmaceutical composite rigid films are used for blister packaging of solid medicines (tablets, capsules). Compared with PVC film, PVC/PVDC pharmaceutical composite rigid film has high moisture barrier and oxygen barrier properties, as references in Table-1.

Table-1 Barrier Properties of PVC Rigid Film and PVC/PVDC Composite Rigid Film

Materials	Thickness （mm）	Water Vapour Transmission Amount，g/（㎡·24h）	Oxygen Vapour Transmission Amount，cm3/（㎡·24h·0.1MPa）
PVC	0.25	≤2.5	≤30
PVC/PVDC（Coating Amount 40g/ ㎡）	0.25	≤0.28	≤0.86
PVC/PVDC（Coating Amount 60g/ ㎡）	0.25	≤0.24	≤0.5
PVC/PVDC（Coating Amount 90g/ ㎡）	0.25	≤0.21	≤0.33

Table-2 Barrier Performance Comparison of PVDC and Other Materials

Materials	Oxygen Resistance of PVDC（Times）	Water Resistance of PVDC（Times）	Odor Barrier of PVDC（Times）
LDPE	1700	20	/
PP	1000	/	17000
PET	20	/	/
PA	10	190	500
EVOH	/	76	1700
PVC	/	5~10
PE	/	/	17000

PVDC with Pharmacy Packaging

As a pharmaceutical high-barrier packaging material, PVDC coating composite material is most used for making pharmaceutical blister packaging, granules and powder composite packaging bags. The mechanical and certain physical properties of the coating material are determined by the base materials. Meanwhile, the barrier performance, fragrance retention, and oil resistance are determined by the coating layer. To find an appropriate package material, the procurement person only need to figure out what you want to pack, and under what kind of circumstance. The base material used in blister packaging is PVC sheet, and the base material used in composite packaging bags for granules and powders is BOPET or BOPP film.

Journey & Mission of Chunguang Group

Chunguang group founded in 2006, it is a high-tech company specializing in design, R&D, production and sales of pharmacy packaging. The main products include

PVC/PCTFE high moisture barrier laminated film 

PVC/PVDC, PVC/PE/PVDC high moisture, oxygen barrier coated film, PVC rigid film 

PVC/PE, PET/PE and other laminated series

Pharma PTP foil

Chunguang’s packing materials are widely used in pharmaceutical, food and other industries.

Chunguang group owns two factories. Shanghai factory owns D-lever dust-free workshop and laboratory, were designed and constructed strictly following the FDA standard. The FDA certification has been launched.The world's latest PVDC coating production line will be introduced. We will strive to become the world's leading pharma packaging company. Jiangxi factory owns D-lever dust-free workshop and laboratory were designed and constructed strictly following the GMP standard.

As members of Chunguang group, we will continue to implement our enterprise spirit of  “Absorption. Practicality Integrity Progressive, Magnanimous, Gratitude”, and management philosophy of “focus on pharmacy packing, care about health” and are committed to be “the leading brand packaging solution for solid oral preparation”!