Grade VMA: It is white powder,ketone soluble with colorless,transparent solution, and because of the carboxyl functional group, it has excellent adhesion on metal, especially on aluminum foil, the resin foil also has a good adhesion on PVC, ABS, paper, textiles, beton, etc. Moreover, it offers a desirable balance of chemical resistance, solubility, diaphaneity, film strength, and thermoplasticity. And it has excellent interbedded adhesion.
VMA Vinyl Resin Quality standard (XHQB-6)
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No.
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Item
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Index
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Test method
|
|
1
|
Appearance
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White powder
|
By visual
|
|
2
|
Whiteness
|
≥80
|
GB2913-82
|
|
3
|
Composition % by Wt
|
Vinyl Chloride 81±1%
|
GB/T7139-2002
|
|
Vinyl Acetate 17±1%
|
ISO1159-1978
|
|
Maleic Acid 2±0.2%
|
|
|
4
|
Reactive Functionality (Carboxyl %)
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2±0.2%
|
|
|
5
|
K Value
|
32-36
|
GB/T 3401-2007
|
|
6
|
Viscosity No. ml/g
|
30-34
|
GB/T 3401-2007
|
|
7
|
Glass Transition Temp ℃
|
About 70
|
GB11998-89
|
|
8
|
Average Molecular Wt
|
About 15000
|
Calculated by the Viscosity No.
|
|
9
|
% by wt, through 60 mesh
|
100%
|
GB/T6003.1
|
|
10
|
Apparent density (g/ml)
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≥0.5
|
GB20022-2005
|
|
11
|
Volatilization (%)
|
≤1%
|
GB/T2914-1999
|
|
12
|
Impurity Particle No. /100g
|
≤20
|
GB9348-88
|
|
13
|
25% resin in MEK/Toluene(50/50)
|
Colorless and Transparent or yellowish
|
By visual
|
Application:
VMA grade yields the good balance of solubility and viscosity properties needed for high-build, air-dry maintenance finishes,and it is often used to make coatings and adhesives applications where higher solids are desirable. It can be used in air-dry finishes, such as maintenance,marine,and metal coatings, interbedded adhesive,aluminum foli varnish,UV surface treatment,UV primer,thermal transfer adhesive, shoe adhesive, ink-jet and metal inks,etc.
Package, storage and transportation:
* In kraft bag, lined with pp bags of 25kgs net, with PE inner bag.
* Store in a dry and ventilated place, do not place in open-air, avoid storage in direct sunlight and caution against wet.
* Must be transported in clean vehicle with awning and keep away from moisture.
* It is NOT hazardous article, and the shelf life is one year from the production date.