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.
| 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)
| 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)
| 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
| 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.
- 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.
- 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.
