PVA High Strength & Modulus Fiber

PVA high - strength & high - modulus fiber taking polyvinyl alcohol as its major raw materials is produced by a special process. It is of high strength, high modulus, acidproof, alkaliproof, abrasion resistance and sunlight resistance which are possessed by PVA fiber, thus it is much better than the other products in general. With these excellent properties, it has a wide application in industry fabric, building reinforcing materials, package materials, ropes and meshes .

 

  1. Applications:
  2. ?/FONT> Concrete reinforcing materials used for buildings.

    ?Ideal replacement of asbestos and glass fiber.

    ?Reinforcing materials for upholstery.

    ?High strength fishing meshes, cables, safety nets.

    ?High strength fabric used in industry.

    ?Modern package reinforcing materials.

     

  3. Specifications and properties:

Item

 

Property

High strength & modulus

.

High strength & modulus

.

Super-short staple fiber . for building

materials

Super-short staple fiber . for building materials

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

Modulus (CN/dtex)

> 240

> 240

>200

>150

Breaking elongation (%)

< 7_1.5

<7_1.5

 

 

Reduction in hot water

< 2

< 3

 

 

Acid proof

Good

good

good

good

Alkali resistance

Good

good

good

good

Ultraviolet resistance

Good

good

good

good

Electric conductivity

Low

low

low

low

Thermal conductivity

Low

low

low

low

 

 

C. Fiber breaking elongation comparisons

 

Fiber

Vinylon

(high strength)

Vinylon

(usual)

Nylon

PP fiber

Polyester (usual)

Polyester (high strength)

Breaking elongation %

7

15

20 - 40

15 - 35

14 - 25

10 - 14

 

D. Alkali resistance comparisons:

 

Test condition

Fiber strength loss ratio (%)

Density %

Temperature

Duration time (hr)

Vinylon-high

strength

Viscose fiber yarn

Nylon 6

Polyester

1

20

10

0

12

0

1

1

100

100

7

29

25

71

40

20

10

0

100

18

4

 

  1. Sunshine resistance comparisons:

 

Exposed in the sunshine(hour)

Fiber strength loss ratio ( % )

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. Applications in asbestos cement products of PVA high strength & modulus fiber:

 

Shortcomings of the main reinforcing materials:

  1. ASBESTOS ?harmful to the health and environment

?/FONT> As a reinforcing material, asbestos has a small tenacity and is easy to break.

?It has the property of acid resistant but not alkali proof.

  1. GLASS FIBER - costly and hard to be popularized.

 

AN IDEAL REPLACEMENT OF ASBESTOS AND GLASS FIBER:

Advantages:

?/FONT> Good physical and chemical properties.

?Excellent mechanics properties to improve board?toughness and anti-

shock ability and to reduce break rate.

?With adequate supply , good quality and good dispersing properties.

?Being suitable for all types of cement with good alkali & acid resistant properties.

?Raising the boardís anti-crook temperature and reducing the product volume.

?Improving the circumstances.

?No need to change original equipment.

 

  1. Suggested formula:

 

  1. Small corrugated tile: :

Unit

Cement

Asbestos

Vinylon

Paper pulp

Sepiolite

Additive

agent

Ratio of the replacement by asbestos

Quantity of the replacement by asbestos

KG

250

26

4.7

6

proper amount

proper amount

1: 4.5

-

%

87.2

9.1

1.64

2.1

-

-

-

40

 

 

2) Cement plate

Unit

Cement

Asbestos

Vinylon

Sepiolite

Paper pulp

Quantity of replace asbestos

KG

250

15

4.7

30

6

-

%

81.78

4.91

1.54

9.81

1.96

70

 

H. Applications in building concrete of PVA high strength & high modulus fiber:

  1. Structural tortoise-cracking in concrete:
  2. In the concrete industry, the only reason for tortoise-cracking is that the inner stress to the concrete surpasses the strength it can bear. People have tried to reinforce the structural strength of the concrete products to offset the stress from outside, but they canít control it effectively, for quite a long time, due to the inner stress caused by shrinkage. During the period of molding, the tortoise-cracking forms within 24 hours after it is molded because of the shrinkage caused by the dryness inside the concrete.

  3. Effective method:
  4. Mixing PVA high strength & high modulus fiber into the primary or secondary reinforcing materials can improve the building material's anti-draw ability and toughness, increase the concreteís ability of tension resistance, reduce the water loss rate, improve the concrete materialís ability of anti-breaking and reduce effectively tortoise-cracking. Thus it is an ideal reinforcing material in the building industry.

  5. Purposes of using the fiber:
  6. ?/FONT> Prevent the tortoise-cracking.

    ?Increasing the tenacity, anti-breaking ability and abrasion resistance.

    ?Raising the weary resistance of anti-elasticity.

    ?Reducing the water osmosis.

    ?Extending the life cycle of the concrete.

  7. Advantages:

?/FONT> With good dispersing ability, it can be dispersed uniformly in every part of the product.

?It is suitable for concrete which canít have metal in it.

?It does not corrode and does not have chemical reactions.

?With excellent ability of anti-alkali, it is suitable for any type of the cement.

?It doesnít affect the surface property of the concrete.

?It can decrease the labor strength and improve the working environment.

?It is easy and safe to use without any need to add any equipment.

 

I. SUGGESTED MIXING QUANTITY:

    1. Used in the lime: 300g fiber/m3 building materials .
    2. Used for the upholstery: 300 g fiber/m3 .
    3. Used as the concrete reinforcing material: 600 g fiber/ m3 concrete.

 

 

 

 

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Email: [email protected]

 

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