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HOME > Speciality Grades > Low Saponification PVOH GOHSEFIMER L SERIES

Speciality Grades

Low Saponification PVOH GOHSEFIMER L SERIES

GOHSEFIMER L SERIES

GOHSEFIMER L SERIES resins were specifically developed as a suspending additive for the polymerization of vinyl chloride. GOHSEFIMER L SERIES resins can be used in conjunction with suspension agents such as GOHSENOL GH, KH, KP, or KZ type PVOH.

Properties
By using GOHSEFIMER L SERIES as an Auxiliary:
  • ・The workability of vinyl chloride resin (PVC) is improved.
  • ・A larger porosity is attained.
  • ・Uniformity in porosity improves.
  • ・Plasticizer absorbing speed increases.
  • ・Gelation speed increases.
  • ・Fish-eye occurrence significantly decreases.

The amount of residual vinyl chloride monomer (VCM) in the PVC will be greatly decreased. As a result, the product can be safely used as a food packaging forming material.

The product helps decrease the energy consumption of PVC manufacturing and forming processes.

  • ・The drying time of the manufacturing process is shorter, and the energy consumption in the VCM-removal column is decreased.
  • ・Furthermore, in the forming process, PVC is readily disintegrated into primary particles to lead to improved forming efficiency.

Technical Specifications
Product Grade Volatile Matter Viscosity(cps) Saponification Degree(mo1 % ) Particle Size
LL-02 3.0 or less 7.0~10.0 45.0~51.0 All particles pass #7 mesh.
L-5407 3.0 or less 9.0~13.0 30.0~38.0 All particles pass #7 mesh.
L-7514 3.0 or less 20.0~28.0 34.0~41.0 All particles pass #7 mesh.

Viscosity: mixture solution of 10.0% methanol and water (1/1, volume ratio)

Solubility
Solvent LL-02 L-5407 L-7514
Water
Water/methanol=1/1
Methanol ○~△
Ethanol ○~△
Acetone ○~△
Methyl acetate
Toluene × × ×
Trichlene ×

Solubility of GOHSEFIMER L SERIES products in water is low.
Solubility (High) ◎>○>△>× (Low)

Mechanical Properties
Product Grade Initial Young's Modulus
(109dyne/cm2,)
Yield Strength
(kg/cm2,)
Rupture Strength
(kg/cm2,)
Elongation
(%)
LL-02 ~4.5 112 126 130
L-5407 ~5.0 125 140 145
L-7514 ~10.5 270 219 45~160

Measuring conditions:
Film; 150~200μ×40mm×15mm
Humidity;20degree C×65 % RH×7days
Pull speed with autograph, 100mm/min,7 cycles

Thermal Properties
LL-02 L-5407 L-7514
Incipient fluidization temperature Approx. 100 degree C Approx. 100 degree C Approx. 110 degree C
Incipient fluidization viscosity 150ps 300ps 4000ps
Decomposition temperature 250 degree C or higher 250 degree C or higher 250 degree C or higher
Grass transition point Approx. 50 degree C Approx. 50 degree C Approx. 45 degree C

Measuring conditions:
Koka flow tester
Load 20kg/cm2,,heat increase rate 1 degree C/min,Orifice dia 1m/mΦ×10m/mL

Optical Properties
Refractive index(nD20): 1.494~1.521
Saponification degree 1.494 at 30.0 mol%
1.521 at 50.0 mol%
Physiological Properties
  • The physiological properties data for GOHSEFIMER L PVOH is currently unavailable. However, because GOHSEFIMER L SERIES products are low saponification PVOH, their physiological properties may be considered to be identical to those of polyvinyl alcohol.
    In a general sense, polyvinyl alcohol is physiologically harmless and has been approved as a cosmetic raw material (cosmetic standard) or drug additive (registered in Japanese Pharmaceutical Codex). It has also been approved as a coating resin for food wrapping by the FDA of America (No. 175300).
    In particular, the solubility of GOHSEFIMER L PVOH in water is significantly low compared to generic PVOH, and is therefore considered to be not readily absorbed in the human or animal mechanism.
  • ・Existing chemical substance registration number
    6-687
    Registered as a vinyl alcohol-vinyl acetate copolymer.
  • ・Already registered in our voluntary control standard on vinyl chloride food wrapper. In Japan, registered in the PL standard "3-A-II-9" of Japan Hygienic PVC Association (JHP).
    3: Chapter 3 List of usable additives
    A:Vinyl chloride polymer and polymer additives
  • ・:Polymer additives for vinyl chloride
    9:Polyvinyl alcohols that contain 50 wt% or more vinyl acetate in terms of polymer unit
    From these facts, GOHSEFIMER L PVOH is considered to be physiologically inactive.
Safety
・Explosivity: Assumed to be the same as generic GOHSENOL
(dust explosion approx. 520 degree C)
・Combustibility:Applies to special combustibility category (synthetic resins) according to the enforcement ordinance of the Fire Act.
Other Precautions
GOHSEFIMER L PVOH is a stable polymer compound, and does not usually putrefy, decompose or depolymerize.
However, owing to a lower glass transition point, conglutination can occur among its particles when stored under a high temperature/humidity, and under a heavy load. If storing in rainy or hot seasons, be very careful to avoid the above conditions.


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