PVA high - strength high

PVA high - strength high - modulus fiber

PVA high - strength high - modulus fiber mainly take polyvinyl alcohol as raw material. It ‘s good at acidproof, alkaliproof, abrasion resistance, sunlight resistance, with high strength and high modulus, its aggregate index is much better than common standard product. It’s mainly used in the field of industry fabric, building material reinforcement, package material, high property rope, net. Etc.

A. main usage: . concrete reinforce material used for building

.. ideal replacement of cement and glass fiber

.. reinforce material for inner wall decorate fiber

.. high strength fishing net,cable,safty net

.. high strength industry used fabric

.. modern package reinforce material

B. main specification and property:

item /property	high strength & modulus 1.	High strength & modulus 2.	Super fiber 1. For building material	super fiber 2. For building material
density (g/cm²)	1.26	1.26	1.26	1.26
titre (dtex)	2.0 ＋/－0.3	2.0＋/－0.3	1.7 - 3.0	1.7 - 3.0
length (mm)	2 - 65	2 - 65	2 - 65	2 - 65
tenacity (CN/dtex)	> 10.5	> 10.5	》8	》6
yang’s modulus (CN/dtex)	> 240	> 240	>200	>150
breaking elongation (%)	< 7+/-1.5	<7+/-1.5
reducing quantity of hot water	< 2	< 3
acid proof	good	good	good	good
alkali resistant	good	good	good	good
ultraviolet lay resistant	good	good	good	good
electric conductivity	low	low	low	low
heat conduction	low	low	low	low

C. fiber breaking elongation comparison


fiber	vinylon-high strength	vinylon-common standard	nylon	PP fiber	polyester (common standard)	polyester (high strength)
breaking elongation %	7	15	20 - 40	15 - 35	14 - 25	10 - 14

D. alkali resistance comparison:

test condition			fiber strength lossing rate (%)
density%	temperature℃	time(h)	vinylon-high	man-made yarn	nylon 6	PET
1	20	10	0	12	0	1
1	100	100	7	29	25	71
40	20	10	0	100	18	4

E. sunshine resistance comparison:

dry in the sun (hour)	fiber strength losing rate ( % )
dry in the sun (hour)	high strength vinylon	nylon 6	viscose fiber	cotton
100	3.05	19.6	4.26	3.67
300	7.93	41.2	7.45	30.73
500	10.98	65.09	25.00	38.53
700	11.16	74.51	63.30	49.54

F. USAGE IN ASBESTOS CEMENT PRODUCT OF PVA HIGH STRENGTH & MODULUS

SHORTCOMING OF THE MAIN REINFORCE MATERIAL:

1. ASBESTOS – harmful to health, polluting circumstances

o acting as a reinforce material, asbestos has a small tenacity,easy to break.

o with property of acid resistant but not alkali proof.

2. GLASS FIBER - high price

PVA HIGH STRENGTH & MODULUS FIBER IS THE IDEAL REPLACEMENT OF ASBESTOS AND GLASS FIBER:

advantage: a. good physical and chemical property.

a. excellent mechanics property, can obviously improve the board’s toughness and the anti-shock ability, reduce break rate.

a. with stable quality and good disperse property.

b. with good alkali & acid resistant property, suitable for each type of cement.

c. improve the board’s anti-crook temperature, reducing product volume.

d. improve environment.

e. no need to reform the original equipment, can used in the common process.

f. the product fits the international BG9772-88.

G. SUGGEST USAGE FORMULA:

1. small corrugated tile: :

unit	cement	asbestos	vinylon	pulp	sepiolite	addition	ratio of replace asbestos	quantity of replace asbestos
KG	250	26	4.7	6	just the right amount	just the right amout	1: 4.5	-
%	87.2	9.1	1.64	2.1	-	-	-	40

2) cement plate

unit	cement	asbestos	vinylon	sepiolite	pulp	quantity of replace asbestos
KG	250	15	4.7	30	6	-
%	81.78	4.91	1.54	9.81	1.96	70

H. USAGE IN THE BUILDING CONCRETE OF PVA HIGH STRENGTH&MODULUS

1. structure tortoise-crack in concrete

o in the concrete industry, the reason of tortoise-crack is of the inner pressure surpassed it should beard tenacity. To strength the structure tenacity can reduce the pressure coming outside, but can’t be controlled effectively because of the inner pressure when shrinkage. In the period of molding, the tortoise-crack happened and formed within 24 hours because of inner dry shrinkage coming from the concrete.

2. available method:

to mix the pva high-strength & modulus fiber as the main or next reinforce material can improve the building material’s anti-draw ability and toughness. It can increase the concrete’s ability of tension resistance, reducing water losing rate, improving the concrete material’s ability of anti-breaking, effectively controlling the tortoise crack.

3. purpose of using the fiber:

restrain tortoise crack

increase tenacity,anti-breaking,wear and tear.

Increase weary resistance of anti-elasticity.

Reduce water oozing.

Extend the concrete life.

4. good property:

good dispersing ability, can dispersed in each part evenly.

Suitable for the concrete place which can’t have metal.

No corrode, without chemical function.

Excellent ability of anti-alkali, suitable for any type of cement.

Doesn’t affect the concrete surface property.