PVA Polyvinyl Alcohol 1788 1799 2488 2688 0588 088-20

• CAS No.: 9002-89-5
• Formula: [C2h4o]N
• EINECS: 209-183-3
• Material: PVA
• Usage: General Plastics, Engineering Plastics, Specialty Plastics
• Plastic Properties After Heated: Thermoplastic Plastics
• Model NO.: 1788 1799 2488 2688 0588 088 -20 BP26 BP24 BP20
• Plastic Forming Method: Blow Molding
• Color: White
• Appearance: Crystal Granular or Powder
• Model Number: 1788 1799 2488 2688 0588 088 -20 Bp26 Bp24 Bp20
• Application: Textile Agent, Paper, Glue, Adhesive etc
• Purity: 86-90%
• Transport Package: 25kg Bag or as Your Required
• Origin: China
• HS Code: 39053000
• Production Capacity: 2000 Metric Ton Per Month

Product Description

Product Properties
Polyvinyl alcohol (PVA) is a non-polluting water-soluble polymer, usually white or slight yellow floccule, flake, granular or powder solid. Its performance is between plastic and rubber. It has good adhesion, film-forming ability, insulation, oil resistance, abrasion resistance and gas barrier property, etc.

1).,Name: Polyvinyl alcohol
Abbreviation: PVA 
2),the molecular composition and structure:
( CH3CHCOOCH3 )x ( CH2CHOH )y
in which: x + y indicates the degree of polymerization, y / (x + y) that alcoholysis degree
3),The physical and chemical properties
The physical property
A,Solubility:
The Polyvinyl alcohol powder can be dissolved in water. PVA with Less than 95% alcoholysis degree can be dissolved in water at room temperature and PVA with more than 99.5% alcoholysis degree can only be dissolved in hot water above 95c.
B,Thermal Stability:
The heat can make PVA soften and there is no significant change below 40c  but 160c  or more, for a long time heated ,it will gradually be colored .when 220c above it is decomposed to produce water, acetic acid, a c etaldehyde and pr o pylene aldehyde.
C,Chemical Resistance:
PVA is almost free from weak acid, weak base, or the impact of organic solvents, oil is very high.
D,Storage Stability:
PVA is a low viscosity of the polymer, the solution is stable at room temperature. Aqueous solution in the storage process is not degenerate.
E,Film:
As the high adhesion between PVA molecular, PVA is easy to form a colorless, transparent film with good mechanical strength, smooth surface without tacky, and good solvent resistance. Monolayer has excellent light-admitting quality , high permeability rate, no charged, no absorption and good printing character . 
The Chemical Property
PVA can be seen as a linear polymer with a hydroxyl polymer. Hydroxyl of molecules which has high activity can be a typical chemical reaction of low-alcohol, such as esterification, etherification, ac e tal, etc and can also react with a number of inorganic compounds or organic compounds.
Spec:
 

TESTED ITEM            Unit                  PVA 2488                                  PVA 1799

                                                  Range of Insp   Result          Range of Insp.        Result

Appearence                 --                   --         White Flakes               --               White Flakes

Alcoholysis Degree     Mole(%)     87.0-89.0      88.5               99.0-100.0              99.6

Viscosity                     mPa.s         45.0-55.0      50.1                20.0-30.0               28.1

Volatile                        Wt(%)           ≤5.0             2.5                    ≤5.0                    2.6

Ash                               %                ≤0.5           0.28                    ≤0.5                    0.27

PH VALUE                    --               5.0-7.0         5.8                     5.0-7.0                 5.6

TESTED ITEM            Unit               PVA 0588                           PVA 2688

                                              Range of Insp   Result         Range of Insp   Result

Appearence                 --                   --         White Flakes          --        White Flakes

Alcoholysis Degree    Mole(%)     87.0-89.0   88.6               87.0-89.0        88.1

Viscosity                    mPa.s         4.5-6.5         5                 56.0-66.0         59.1

Volatile                      Wt(%)            ≤5.0         2.6                    ≤5.0              3

Ash                             %                 ≤0.5         0.3                    ≤0.5            0.29

PH VALUE                  --                5.0-7.0      5.9                  5.0-7.0           5.9

TESTED ITEM            Unit                  PVA 1788                        PVA 088-20

                                               Range of Insp    Result      Range of Insp.    Result

Appearence                  --                --          White Flakes          --           White Flakes

Alcoholysis Degree   Mole(%)   87.0-89.0         88.5           87.0-89.0           88.6

Viscosity                    mPa.s      20.0-28.0         24.1          20.0-26.0           23.1

Volatile                       Wt(%)          ≤5.0             2.5               ≤5.0                 2.4

Ash                              %               ≤0.5            0.28             ≤0.5                 0.26

PH VALUE                  --             5.0-7.0            5.8            5.0-7.0                5.3

Package, Transport and Storage:
 Appearance:Floc , Flake, Powder. 
A,12.5 kg, 20 kg, 25 kg plastic woven bag or paper bag, 750Kg ~ 1000Kg woven tons of bags.
B,Transport using a clean conveyance to prevent moisture, rain and sun and moving gently to prevent the package