By using GOHSENX LL 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 Specification
Product Grade Volatile Matter Viscosity (cps) Saponification Degree (mol% ) Particle Size
LL-810 5.0 or less 7.5 ~ 9.5 45.0 ~ 51.0 All particles pass #7 mesh.
LL-920 5.0 or less 9.0 ~ 13.0 34.0 ~ 38.0 All particles pass #7 mesh.
LL-940 5.0 or less 20.0 ~ 28.0 34.0 ~ 38.0 All particles pass #7 mesh.
Viscosity: mixture solution of 10.0% methanol and water (1/1, volume ratio)
Solvent LL-810 LL-920 LL-940
Water Δ Δ Δ
Water/methanol=1/1 Ø Ø Ø
Methanol Ο ~ Δ Ο Ο
Ethanol Ο ~ Δ Ο Ο
Acetone Ο ~ Δ Ο Ο
Methyl acetate Δ Ο Ο
Toluene × × ×
Trichlene × Δ Δ

Solubility of GOHSENX LL SERIES products in water is low.

Solubility (High) Ø > Ο > Δ > × (Low)

Mechanical Properties
Product Grade Initial Young’s Modulus (109dyne/cm2) Yield Strength (kg/cm2) Rupture Strength (kg/cm2) Elongation (%)
LL-810 ~ 4.5 112 126 130
LL-920 ~ 5.0 125 140 145
LL-940 ~ 10.5 270 219 45 ~ 160
Measuring conditions: Film; 150-200μ×40mm×15mm
Humidity; 20 degree C×65% RH×7 days
Pull speed with autograph, 100 mm/min, 7 cycle
Thermal Properties
  LL-810 LL-920 LL-940
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 20 kg/cm 2, 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 GOHSENX LL PVOH is currently unavailable. However, because GOHSENX LL 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 GOHSENX LL 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, GOHSENX LL PVOH is considered to be physiologically inactive.


  • 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

GOHSENX LL 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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