Cold Formed OPA/Al/PVC Sandwiched Foil For Blister Packs
About Cold Formed Alu Alu Foil ：
Cold formed aluminum foil is at the heart of alu alu OPA/Al/PVC sandwich foils used for pharmaceutical blister pack applications because of their inherently superior advantages. Aluminum, even in micron thickness, is the best vapor and light barrier besides providing aesthetic shine for pharmaceutical blister packs.
What is pharmaceutical Cold forming foil？
Pharmaceutical Cold forming foil is made of aluminum foil, nylon (oPA) and PVC films, by using dry bond lamination technology. As blisters are formed at room temperature, without heating, so it is called as cold forming blister laminated foil.
Cold forming foil is one type of triplex packaging material, between each two layers, there is adhesive for lamination. The adhesive we are using is imported from USA, to ensure good performance during cold forming process, such as no delamination and cracking.
|Name||Cold-Form Aluminum Foils|
|GSM||240g ~265g||281g ~300g|
|Specification||Width< 1000mm; Thickness: 0.14-0.16 mm; ID of core: 76 mm OD of core: 240-280mm, also can be according to customer’s requirements|
Warm advice ：
generally speaking: the light foil 25/50/60 & 25/45/60 is good enough for small blisters or doses, small round tablets or pills, etc. But the blister profile and distance between each one will affect the performance of cold forming.
Meanwhile the operating speed, mold condition would take into account. Do not worry, we Dirante will offer free sample to you for machine trial. It only takes 5-7days to prepare plain sample.
So it is best that you could share us the forming drawings, or send blister packs to us; if not available, the clear images of blister pack will be helpful to check and recommend the good foil to you.
There are regulations on how moisture-, oxygen- and light-resistant
blister packaging must be, but some products may require extra
resistance. While many different materials can be used to make blister
packs, they can be separated into two categories: cold-formable and
Cold-formable material is commonly pressed aluminum that is laminated with plastic. The aluminum is resistant to many outside forces and has high mechanical resistance; aluminum has a tendency to leech into other materials and to crack, but the plastic inclusion corrects these issues. Thermoformable materials are plastics that can be easily molded into any shape, but they are not as resistant to outside forces — especially light — because the plastic is transparent. If the product is a simple shape that needs high resistance, then cold-formable materials are likely best;
Cold Forming Blister Foil(Alu-Alu) is one kind of blister primary packaging material for solid pharmaceuticals, like tablet & capsule.
The foil produced in Dirante factory is three layers laminated: oPA / Alu / PVC, under using dry bond lamination technology.
The PVC film in alu -alu laminate is commonly used as the contact layer and seal to the lidding foil on pharmaceutical blisterpack (as neutral layer for the goods to be filled).
PVC is very stiff and does not tend to shrink or spring during cold forming. Once the cold forming process is complete, the PVC helps the cavity hold its shape. In short, it ensures the geometric stability after cold forming.
The nylon (oPA) film is mostly responsible for the multi - axial forming. Laminating the aluminum with the oPA film doubles the formability of the blister.
Cold Forming Blister Foil Specification：
|Name||Cold-Form Aluminum Foils|
|Structure||oPA 25-30 mic/ Alu 45-75 mic/ PVC 60 mic|
|Specification||Width: 60 - 1000 mm; |
Thickness: 130 - 200 mic;
Core ID: 76 mm, paper reel;
Roll OD: 260-300mm, also can be as your request
Technical data of ALU ALU are offered as follows：
|Opa layer thickness||23.0-27.0 /μm||25|
|Opa layer GSM||25.99-30.51||28.8|
|Aluminum foil GSM||124.2-145.8||133|
|PVC thickness PVC||56.0-63.6||60|
|Width (mm)||± 1.0||0|
|Pin Hole||Max 0 no./ SQM||0|
|Toxicity||Non Toxic||No found|
|WVTR||>=0.005 Gm/ m2.day||0.06|
|OTR||>=0.005 cc/ m2.day||0.09|
|Bonding Strength||PA / AL ≥ 8.0 N/15mm||Horizontal: No Peel-off|
|Vertical: No Peel-off|
|AL / PVC ≥ 7.0 N/15mm||Horizontal：11.6 N|
|No. of Joints||Max. 2 Per roll||<=2< td="">|
Blister packs are commonly used as unit-dose packaging for pharmaceutical tablets, capsules etc. The primary component of blister pack is a cavity or pocket made from a formable film, usually a thermoformed plastic or cold formed aluminum film. This usually has a lidding seal of aluminum foil.
Using different packaging materials and principles of forming, Blister Packs may be divided into two types: aluminum/plastic (thermoforming) blister pack, aluminum/aluminum (cold forming) blister pack.
Not suitable for light-sensitive drugs because of the transparency of PVC.
1.printing → 2.laminated → 3.Curing → 4.cutting → 5.Quality Inspection → 6.Package →7.Delivery