Officinal PVC/PE/PVDC coated film, in practical application process, PVDC has a good obstruct ability, but also has a large brittleness. Some foreign companies add PE between PVC and PVDC, the brittleness of PVDC have solved and the intermediate PE will have a great benefit in total toughness in packaging.
PVDC material itself is the latex character, has quite big brittleness after the solidification. In the coating process and post-processing, the pivotal technical is to reduce its brittleness, make it normally used in the room temperature environment. Before, the technical ability is too poor to do so. That is one of the technical difficulties of PVDC compound material
On the basis of oversea craft brother's experience, our technician first produces successfully in China. It mainly takes PVC film as the basal material, then coated PVDC(import from BASF in Germany). During the production processing, the temperature, coated quantity and times and other important considerations are checked strictly to make the final product meet the foreign products quality standards. The obstruct ability is 5 times higher than the common PVC.
Meantime it has a certain rigidity, flexible and can be widely used in packaging various solid medicine, especially for easy humidity absorb medicine.
According to the investigation, presently 80% medicine using such packaging materials, but the PVC film that widespread used in China could infiltrate the gas and liquor 6 months later in the room temperature condition. It has a great impact on the product. But if using PVDC, the period for protection to medicine can really reach at least 2 years.
A. Technology parameter
|
The examination result compilation
|
|
Item
|
Technology requirement
|
Result
|
Verdict
|
|
Facies
|
Should be colorless and transparent ,even equal ,unallowed corrugation ,oil spot , foreign matter,perforation ,impurity .the crystals not allowed appears above1.3 mm, not exceed three granules in 1.3mm and below 1.3mm per 100c㎡
|
Accord prescribe
|
Accord prescribe
|
|
Distinction
|
Infrared atlas
|
The result should be consistent when pvc and pvdc compare with the atlas, separately .
|
Accord prescribe
|
Accord prescribe
|
|
Color change
|
Pvdc surface appears orange, pvc surface color has no change
|
Accord prescribe
|
Accord prescribe
|
|
PVDC coated quantum
|
40g/㎡±7%
|
+0%
40g/㎡
-3.9%
|
Accord
|
|
Physics
capability
|
Vapor permeation quantity
|
≤0.8g/(㎡·24h)
|
0.3 g/(㎡·24h)
|
Accord
|
|
Oxygen permeation quantity
|
≤3.0cm3/(㎡·24h·0.1MPa)
|
1.6cm3/(㎡·24h·0.1MPa)
|
Accord
|
|
Elongate intensity
|
≥40MPa
|
lengthways:55Mpa
landscape :54 MPa
|
Accord
|
|
Strike intensity
|
Not exceed than two samples damaged out of five samples in landscape orientation and lengthways ,separately
|
landscape orientation : no damage
lengthways :no damage
|
Accord
|
|
Heat up extend and draw back
|
Within ±6%
|
Lengthways:-2.2%
landscape:+0.5%
|
Accord
|
|
|
Heat up conglutination intensity
|
≥6.0N/15mm
|
7.1N/15mm
|
Accord
|
|
Solvent remnant allowance
|
≤10mg/㎡
|
Not test out
|
Accord
|
|
Pvc monomer
|
≤1ug/g(subter-millionth)
|
＜1ug/g
|
Accord
|
|
Pvdcmonomer
|
≤3ug/g(subter-millionth)
|
＜0.1ug/g
|
Accord
|
|
Separate out of diffluence
|
Clear degree
|
Solution should be clear,if turbidity ,not allowed heavier than No2 Turbidity standard
|
Accord prescribe
|
Accord
|
|
Facility oxide
|
The tolerance of the Consumption Of The water steep and the blank solution ≤2.0ml
|
1.1ml
|
Accord
|
|
Heavy metal
|
Subter-millionth
|
Subter-millionth
|
Accord
|
|
Fixed matter
|
Water steep
|
≤30.0mg/100ml
|
5.2mg/100ml
|
Accord
|
|
65% Ethyl
Alcohol
solution
|
≤30.0mg/100ml
|
4.4mg/100ml
|
Accord
|
|
hexane solution
|
≤30.0mg/100ml
|
4.2mg/100ml
|
Accord
|
|
Animalcule
|
Amount of Microbe
|
≤1000/100cm2
|
≤30/100 cm2
|
Accord
|
|
Amount of Mildew
and Microzyme
|
≤100/100cm2
|
≤30/ 100 cm2
|
Accord
|
|
Amount of coliform
|
No check out
|
No check out
|
Accord
|
|
Abnormity toxicity
|
In order
|
Accord prescribe
|
Accord
|
B. Use parameter (our product is different from other supplier’s)
Blister temperature: 80℃ — 120℃, normally 5℃ higher than PVC , Sealing temperature 170℃ — 180℃
Negative pressure: 2.4
