Properties
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.
| 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) |
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| 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 | ||
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| 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 | ||
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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.
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
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.
