GB 9962-1999Laminated glass (English PDF)

3.1 Laminated glass

It refers to the glass products produced by putting the interlayer in between one

layer of glass and one or more layers of glass or plastic materials.

3.2 Interlayer

It refers to the materials playing the roles of bonding and isolation between

glass or between glass and plastic materials, so as to ensure that the laminated

glass has resistance to impact, solar control and sound insulation.

3.3 Laminated glass of category I

It refers to the laminated glass making no requirements for the grape-shot bag

impact test.

3.4 Laminated glass of category II-1

It refers to the laminated glass with the grape-shot bag impact height of

1,200mm and conforming to the provisions of Section 5.11.

3.5 Laminated glass of category II-2

It refers to the laminated glass with the grape-shot bag impact height of 750mm

and conforming to the provisions of Section 5.11.

3.6 Laminated glass of category III

It refers to the laminated glass with the total thickness of not greater than 16mm

and conforming to the provisions of Section 5.11.

4.1 CLASSIFY in accordance with shapes.

For the multilayer products, the products with the total raw glass thicknesses of

greater than 24mm, and the products using tempered glass as raw glass, the

thickness tolerances shall be agreed by the supply and requisitioning parties.

5.3.3.1 Thickness deviation of dry laminated glass

The thickness deviation of dry laminated glass cannot exceed the sum OF the

tolerances of the raw glass sheets constituting laminated glass AND the

interlayer tolerances. When the total interlayer thickness is less than 2mm, the

tolerances shall not be taken into consideration. When the total interlayer

thickness is greater than 2mm, the tolerances shall be ± 0.2mm.

5.3.3.2 Thickness deviation of wet laminated glass

The thickness deviation of wet laminated glass cannot exceed the sum OF the

tolerances of the raw glass sheets constituting laminated glass AND the

interlayer tolerances.

For the interlayer tolerances, SEE Table 5.

Table 5 Wet Laminated Glass - Interlayer Tolerances

5.3.4 Diagonal deviation

For the products made of rectangular laminated glass, when the side length is

less than 2,400mm, the diagonal deviation shall not be greater than 4mm; when

the side length is greater than 2,400mm, the diagonal deviation shall be agreed

by the supply and requisitioning parties.

5.4 Flexibility

The flexibility of flat laminated glass shall not be greater than 0.3%. The

flexibility of the laminated glass made of wired glass or tempered glass shall be

agreed by the supply and requisitioning parties.

5.5 Visible light transmittance

The visible light transmittance shall be agreed by the supply and requisitioning

parties. TAKE three test samples for testing. The three test samples are

considered to be qualified when all of them conform to the requirements.

mm

Interlayer thickness d Tolerance delta

5.6 Visible light reflectance

The visible light reflectance shall be agreed by the supply and requisitioning

parties. TAKE three test samples for testing. The three test samples are

considered to be qualified when all of them conform to the requirements.

5.7 Heat resistance

The test samples are allowed to have cracks after the test. However, no bubbles

or other defects can generate in the sections that are 13mm beyond the edges

or cracks.

TAKE three test samples for testing. The three test samples are considered to

be qualified when all of them conform to the requirements. When one of them

fails to conform to the requirements, the three test samples are considered to

be unqualified. When the second test sample conforms to the requirements,

CONDUCT additional test to three new test samples. The three test samples

are considered to be qualified when all of them conform to the requirements.

5.8 Moisture resistance

After the test, no bubbles or other defects can generate in the sections that are

15mm beyond the original edges, 25mm beyond the new trimming, and 10mm

beyond the cracks.

TAKE three test samples for testing. The three test samples are considered to

be qualified when all of them conform to the requirements. When one of them

fails to conform to the requirements, the three test samples are considered to

be unqualified. When the second test sample conforms to the requirements,

CONDUCT additional test to three new test samples. The three test samples

are considered to be qualifi...

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