Hongtai Industry Group Company is a Chinese aluminium composite panel (ACP) manufacturer. Since our beginning in 1995, we have been dedicated to producing and supplying high quality PVDF coating aluminium composite panels, mirror finish aluminium composite panels, wood grain aluminum composite panels, and fire resistant aluminum composite panels etc. These products can be used as aluminium composite decorative panels, industrial aluminium composite panels, bathroom wall panels, kitchen wall panels, etc. They are particularly suitable for external cladding of buildings, balconies, column covers, beams wraps, as well as signboards, billboards, exhibition stands, interior wall decorative panels, ceilings, etc. To offer customers high quality ACPs, we only use superior raw materials, such as high-strength, rust-proof aluminium alloy, PPG paint, Dupont bond material, Henkel film technology for surface treatment, Novacel protective film, and specialized modified PE core material. In addition, our aluminum composite panels are CE certified, and SGS approved, so please feel secure in using them.

Aluminium Composite Panel Materials
1. The Decorative Layer of Surface
The decorative layer for metal substrate mainly includes all kinds of coatings, surface transformation etc.
1) Paint Coating
Types:
Acryloyl (AC), Silicon Modified Polyester (SMPE), Polyester (PET), Polyester Amide (PA), SDPE, Epoxide, Urethane (PV), Polyvinylidene Fluoride (PVDF)

PVDF Coating
The structure combined fluorin-carbon short bond with hydrogen bond is the steadiest and firmest structure among all kinds of chemical structures at present. The electronegativeatom index of PVDF coating, which is the key criterion for judging stability and fastening of structure, reaches 105 kilo joule / mole. For common coatings, the index is just 83.2 kilo joule / mole.
There is an inorganic material whose constituent is SiO2 It is created by chemical method and composed of pure inorganic resin. As the energy of composing Silicon and Oxides is 101 kilo joule /more, this kind of unite cannot be damaged by ultraviolet radiation.
In addition, PVDF coating also provides outstanding contamination resistance, incombustibility, and environmental protection.

The Coating of ALUTILE Exterior Composite Curtain-Wall Panel
Generally speaking, the higher content of PVDF and better weather resistance, the poorer adhesive force. However, as ALUTILE aluminium composite panel chooses a scientific arrange in pairs or groups for PVDF coating, the percent of PVDF in prime paint is low and the adhesive force is good. Hence the prime paint can adhere to the base material very well. It creates a layer of thermoplastic PVDF coating, which features excellent Mek resistance.

Technical Data of ALUTILE PVDF Coating
1) General Properties

Dry Film Property	Test Method	Criteria
60°Gloss	ASTM D523-89	20%to75%
Formability(T-bend)	ECCA 11-19 ASTM D1737-62	2T, no cracking
Reverse Impact-Crosshatch	ECCA 11-5	No fall off
Pencil Hardness	ASTM D3363-92a	3H
Adhesion: Dry Wet Boiling Water	ASTM D3359, Method 837.8, 24hrs, 100℃,120min.	NO Change NO Change NO Change
Abrasion Resistance	ASTM D968-93 (Shakeout)	20 liters/mil as the criterion of AAMA, 70 liters/mil as the actual value
Chemical Resistance: HCI H2SO4 Mortar Detergent	ASTM D1308-79 ASTM D1308-79 AAMA 605.2-90 ASTM D2248-73	NO Change NO Change NO Change NO Change

The thickness of PVDF coating can be measured by the enlarged cross-section diagram. In order to reduce the cost, some inferior panels may be made by means of increasing the prime thickness and reducing the thickness of PVDF varnish paint.

2) Weatherability

Dry Film Property	Text Method	Criteria
Color Retention	ASTM D2244-93	Max.5 units after 4000 hrs.
Gloss Retention	ASTM D523-89	70% after 4000 hrs
Chalking	ASTM D4214-89	Max. 8 units after 4000 hrs.
Salt Spray	ASTM D-B117-90 ECCA 11-2	Blisters-10 Scribe-8 3000 hrs, aluminium 35℃
Humidity-Thermal	ASTM D2246-65	No blister No cracking 10 cycles: 24 hrs×100% RH, 37.8℃:2 hrs×18℃ 4 hrs. ×24℃
Humidity	ASTM D2247-94	No change 3000 hrs, aluminium 35℃

2) Sticking Film
A layer of decorative film (such as PVC, PE film) is sticking to the surface of base material. Because of their poor weathering resistance, some decorative films are unusable. PET film, a kind of high performance polyester film, adheres to the polyester coating on the surface of base material through continuous thermal plying method. The film comes in many kinds of styles, and can imitate all kinds of material, such as marble and nature lumber etc.

3) Conversion Coating
A kind of anti-corrosion conversion coating is created on the surface of metal by chemical method. With rapid development of technology, the performance of conversion coating is greatly improved. Especially for a kin of porcelain oxidation, there is a compact oxidation layer A1203 on the surface of aluminium.
With strong surface hardness, good weather resistance, scuff resistance and abrasion resistance, it is frequently used for decorating floor.

Hongtai Industry Group Company can supply the above curtain-wall materials with the several decoration coatings.

2. Protective Film
The protective film protects panel from mechanic damage and contamination when cutting, transiting, grooving and folding After installation of aluminium composite panels, protective film should be peeled off.
ALUTLE aluminium composite panels adopt the top-grade protective film supplied by French and German companies.
Basic film material: Double PE
Good retardation performance; better weathering resistance than PVC.
Structure type: Inner in black, exterior in white
High cost, excellent weathering resistance, stable bond performance. The glue rarely remains on the panel surface.
Glue type : Rubber
White exterior, black inner, black prevents ultraviolet radiation and white reflects ultraviolet radiation. The glue film is also featured by excellent retardation performance and protection.

How to determine the quality of protective film:
Film thickness > 0.08mm, black inner and milky white exterior
According to the graph, the transparency degree of protective film should be very low. Tearing off the film rubber layer only causes low voice.
The gloss of rubber layer is low.
The voice generally is high when tearing off the film with acryloyl layer, string is very short and the gloss of rubber layer is high.
This is only for reference. It can not be the final judgment, as it must be tested by advanced by advanced instrument.

3. High Molecular Adhesive FILM
Molecular structure of high molecular adhesive film
EAA*(ethylene-acrylic acid copolymer)

Adhesion principle of high molecular adhesive film
(Crylic acid polar branch can combine with polar metal surface to create hydrogen bond)
EAA*(ethylene-acrylic acid copolymer)

According to the test, the adhesive force reflects the proportion of acrylic acid copolymer unit in high molecular film for aluminium sheet (thickness 0.5mm).

The production methods of high molecular adhesive film: glue spraying, glue spreading, radioactive combination, blow molding and two-layer coextrusion etc.
ALUTLE nano rubber fire-resistant aluminium composite panel adopts two-layer high molecular adhesive film.

	Test Result	ALUTILE Standard	China National Standard
0.21mm Aluminium coil	6.6	≥6.0	≥5.0
0.50mm Aluminium coil	12	≥8.0	≥7.0

4. Core Materials
There are mainly two kinds of core materials for ALUTILE composite panel: Polyethylene core for aluminium composite panel, un-flammable Nano rubber-plastic core for fire-resistant aluminium composite panel.
1) Core Materials of ALUTILE Aluminium Composite Panel
ALUILE aluminium composite panel adopts polyethylene core materials: LDPE and LLDPE. This type of panel has excellent properties, such as easy processing, good chemical resistance and mechanic performance. So ALUTILE aluminium composite panel is unaffected in tropical or frigid atmosphere.
2) Core Material of ALUTILE Fire-Resistant Aluminium Composite Panel
It is a new-type core material that is independently developed by our company. It is alloy outcome of inorganic nano material and many kinds of high molecular material. With high oxygen index, it possesses excellent weathering resistance and mechanic performance. It can be applied in more fields and used in higher buildings due to improved dynamics strength, fatigue property and corrosion-resistance of folding position.