GB/T 17748-2016 English PDF (GBT17748-2016)

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GB/T 17748-2016: Aluminum-plastic composite panel for curtain wall
GB/T 17748-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.99
Q 18
Replacing GB/T 17748-2008
Aluminum-plastic composite panel for curtain wall
ISSUED ON. OCTOBER 13, 2016
IMPLEMENTED ON. SEPTEMBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Classification, specifications and marking ... 7 
5 Raw materials ... 8 
6 Requirements ... 8 
7 Test methods ... 11 
8 Inspection rules ... 26 
9 Marking, packaging, transportation, storage and accompanying documents
... 27 
Appendix A (Informative) Adhesive film ... 29 
Appendix B (Informative) Protective film ... 32 
Appendix C (Informative) Application guide for aluminum-plastic composite
panel ... 35 
Aluminum-plastic composite panel for curtain wall
1 Scope
This standard specifies the terms and definitions, classifications, specifications
and markings, raw materials, requirements, test methods, inspection rules,
signs, packaging, transportation, storage and accompanying documents for
aluminum-plastic composite panels (hereinafter referred to as “panels for
curtain wall”) for building curtain walls.
This standard is applicable to aluminum-plastic composite panels for building
curtain walls. For aluminum-plastic composite panels for other purposes, they
may make reference to this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 1457 Test method for climbing drum peel strength of sandwich
constructions
GB/T 1634.2 Plastics - Determination of temperature of deflection under load
- Part 2. Plastics, ebonite and long-fiber-reinforced composites
GB/T 1720 Method of test for adhesion of paint films
GB/T 1732 Determination of impact resistance of film
GB/T 1740 Determination of resistance to heat and humidity of paint films
GB/T 1766 Paints and varnishes - Rating schemes of degradation of coats
GB/T 1771 Paints and varnishes - Determination of resistance to neutral salt
spray (fog)
GB/T 2918 Plastics - Standard atmospheres for conditioning and testing
GB/T 3880.2 Wrought aluminum and aluminum alloy plates, sheets and
3.2
Aluminum-plastic composite panel for curtain wall
The aluminum-plastic composite panel which uses the flame-retardancy-
treated plastic as the core material, is used as the materials for curtain wall.
3.3
Wave
The non-decorative wavy lines or concave-convex on the decorative surface
of the product.
3.4
Spot
Local defects in the decorative surface of the product.
3.5
Bubble
Local bulging of the aluminum or decorative finish of the product.
3.6
Adhesive film
A composite film formed by co-extruding a functional polymer material
(referred to as a binder) and polyethylene in a production process of an
aluminum-plastic composite panel, which is used for bonding between a
core material and an aluminum material.
4 Classification, specifications and marking
4.1 Classification
It is divided as follows based on combustion performance.
- Flame-retardant type, codenamed FR;
- High-flame-retardant type, codenamed HFR.
4.2 Specifications
The common specifications of panels for curtain wall are as shown in Table 1.
Other specifications may be agreed between the supplier and the purchaser.
7.3 Aluminum thickness
Peel the aluminum material off from the specimen as a test piece. Use the
measuring instrument which has a minimum division value of 0.01 mm to
measure the thickness of the aluminum (excluding the thickness of the coatings,
etc.). The measuring point contains at least 5 places. four corners and the
center. Use the arithmetic mean and minimum value of all the measured values
as the test results.
7.4 Appearance
In the natural light that is not exposed to direct sunlight, erect the panels along
the same production direction side by side to form one plane, the angle between
the panel and the horizontal plane is 70° ± 10°, perform visual inspection at 3
m away from the center of the formed panel plane. For different defects which
are visually observed, use the straight ruler which has a minimum division value
of 1 mm to measure its maximum dimension. The personnel who takes and
arranges the specimen shall not participate in the visual test.
When there is any dispute about the result of visually-observed color difference,
it shall follow the provisions of GB/T 11942 to perform arbitration test of color
difference. During the test, it shall maintain the consistency of the production
direction of the test piece.
7.5 Allowable deviation of dimension
7.5.1 Length and width
Use a steel tape which has the minimum division value of 1 mm to measure the
length or width. Use the maximum difference between all measured values and
nominal values of length or width as the test result.
7.5.2 Thickness
Use a measuring instrument which has a minimum division value of 0.01 mm
to measure the thickness at least 20 mm inward from the edge of the panel.
The measuring point includes at least the four corners and the midpoints of four
edges. Use the maximum difference between all measured values and the
nominal value as the test result.
7.5.3 Diagonal difference
Use a steel tape which has the minimum division value of 1 mm to measure
and calculate the difference between the lengths of the two diagonals on the
same panel. Use the maximum value of all the measured differences as the test
result.
7.5.4 Edge straightness
Place the panel flatly on the platform, use the side of the 1000 mm long steel
ruler to lean against the edge of the panel. Then use the feeler gauge to
measure the maximum gap between the edge of the panel and the side of the
steel ruler. Use the maximum value of all the measured values on each side as
the test result.
7.5.5 Warpage
Place the concave surface of the panel upwards on the horizontal platform flatly,
use a 1000 long steel ruler to stand laterally on the panel. Then use the steel
ruler which has the minimum division value of 0.5 mm to measure the maximum
gap height between the steel ruler and the panel. Use the maximum value of all
the measured values is used as the test result.
7.6 Coating performance
7.6.1 Coating thickness
It is performed in accordance with the provisions of GB/T 4957. The measuring
point shall include at least 5 places. four corners and center. Use the minimum
and arithmetic mean of all the measured values as the test results.
7.6.2 Surface pencil hardness
It is performed in accordance with the provisions of GB/T 6739. After the test,
the surface of the test piece shall be free of furrows or scratches. Take the
minimum of all measured values as the test result.
7.6.3 Gloss deviation
It is performed in accordance with the provisions of GB/T 9754. The measuring
point shall include at least 5 places. four corners and center. During the test, it
shall maintain the consistency of the production direction of the test piece. Use
th...