PELESTAT 300 is a polymer-alloy type permanent antistatic agent for polyolefin resins (e.g. Polyethylene, polypropylene) which was developed by using an original Sanyo Chemical compatibilization technique. This product imparts a long-lasting antistatic property to polyolefin resins while causing practically no lowering of their physical properties and moldability. This product dry-blended with polyolefin can be directly molded into the final product, using appropriate molders such as an injection molding machine, an extrusion molding machine and a calender, without a kneading process because this product exhibits excellent dispersibility in polyolefin.

Functions: Anti-Static Agent

Chemical Family: Polyethers, Polyolefins

Compatible Polymers & Resins: Polyethylenes (PE), Polypropylenes (PP)

Processing Methods: Blown Film Extrusion, Dry Blending, Extrusion, Film Extrusion, Injection Molding

Features: Anti-Static, Good Moldability, Good Retention of Properties, Reduced Surface Resistivity

    Knowde Enhanced TDS

    Identification & Functionality

    Chemical Family
    Plastics & Elastomers Functions

    Features & Benefits

    Features

    PELESTAT 300 has the following features:

    • This product imparts excellent antistatic and antifouling properties to polyolefin when the amount added is between 5 and 15 wt %. 􀀁
    • This product exhibits a permanent antistatic property immediately after molding. The antistatic property in the resulting plastic minimally changes even after washing with water because it is a high-molecular-weight antistatic agent. In addition, it works even in low humidity due to its low dependency on humidity.
    • This product dry-blended with polyolefin can be directly molded into the final product without a kneading process. Moreover, this product minimally affects the mechanical properties and moldability of the polyolefin.

    Applications & Uses

    Compatible Polymers & Resins
    Application Methods

    1. General Procedure
    As shown in Figure 1, polyolefin and PELESTAT 300 are dry-blended using a blender.
    This blend is then molded into the final product using an appropriate molder (e.g., injection
    molding machine). Fillers and dispersants can be added during the dry-blending process if necessary.

    SANAM Corporation PELESTAT 300 Application Methods - 1

    a) normal flow process
    b) if kneading is required.

                              Figure 1. General Procedure for Application of PELESTAT 300

    2. Amount to be Used
    The standard amount of PELESTAT 300 is between 5 and 15 wt %.
    Determine the optimal amount by referring to the results of its performance tests.

    3. Kneading Conditions
    Use a high share rate kneader (e.g., a twin-screw extruder) if the kneading process is required. The standard kneading temperature is between 180 and 230 °C (356 – 446 °F). Determine the kneading temperature according to the resin applied.

    4. Drying of PELESTAT 300

    • This product can be immediately used after the factory sealed package is opened because this product is packed under moisture-proof conditions.
    • Drying is necessary when the factory sealed package is kept unsealed for several hours because this product has some hygroscopic properties. The following are examples of the conditions for drying.
    Drying under reduced pressure
    Vacuum Below 1300 Pa (0.2 psi)
    Temperature 70°C – 80°C (158°F – 176°F)
    Duration 2 – 4 hours

     

    Hot-air drying
    Duration 4 – 6 hours
    Temperature 85°C – 95°C (185°F – 203°F)

     SANAM Corporation PELESTAT 300 Application Methods - 2

                        Figure 2. Hygroscopic Properties of PELESTAT 300

    Precaution Against Mishandling

    • In the case of using resins at molding temperatures below 160 °C (320 °F), PELESTAT 300 may not fuse, possibly resulting in poor effectiveness. Furthermore, in case of using resins at molding temperatures above 240 °C (464 °F), this product may thermally decompose, possibly resulting in poor effectiveness. The recommended molding temperature is between 160 and 230 °C (320 – 446 °F).
    • Depending on the kind of resin, this product may have an influence on the resin's physical properties including mechanical properties. Test their influence on each other’s physical properties beforehand to ensure that there are no problems.
    Examples of Applications

    PELESTAT 300 has been used as a permanent antistatic agent in polyolefin in the following
    applications:

    • Various containers and storage cases for electric and electronic parts, etc.
    • Household electrical goods, office equipment, etc.
    • Floor materials, base materials for tapes, etc.􀀁

    Properties

    Physical Form
    Appearance
    Pale yellow pellet
    Typical Properties
    ValueUnitsTest Method / Conditions
    Melting Pointapprox. 135 (275)°C(°F)DSC, ASTM D 3418
    Melting Pointapprox. 163 (325)°C(°F)
    Surface resistivityapprox. 1 × 10^8ΩASTM D 257
    Thermal Degradation Temperatureapprox. 240 (464)°C(°F)
    Surface Resistivityapprox. 5 × 10^7ΩASTM D 257
    Thermal Degradation Temperature (The lowest temperature at which PELESTAT 300 begins to thermally decompose. (Measured using a thermal gravimeter in air)approx. 250 (482)°C(°F)

    Regulatory & Compliance

    Patent Registered

    USP 6,552,131

    Technical Details & Test Data

    Performance Tests

    The examples on pages 4 to 7 are the results of performance tests using polyolefin mixed with PELESTAT 300. This product imparts a permanent antistatic property to polyolefin that cannot be attained by any other conventional blend-type, low-molecular-weight antistatic agent. Furthermore, this product minimally affects the physical properties of polyolefin because this product is highly compatible with it.

    1. Application to PP
    A. Relationship Between Amount of PELESTAT 300 and Resulting Surface Resistivity
    PP containing PELESTAT 300 is highly antistatic when the concentration of this product is between 5 and 15 wt %. Refer to Figure 3 and determine the optimal amount according to the desired surface resistivity.

    SANAM Corporation PELESTAT 300 Performance Tests - 1

                                                               Amount of PELESTAT 300 (wt %)

                      Figure 3. Relationship Between Amount of PELESTAT 300 and Surface Resistivity

    Materials and Methods:
    Materials:Injection molding machine􀀁
    A predetermined amount of PELESTAT 300 was dry-blended with PP and the mixture was molded using an injection molding machine [nozzle temperature: approx. 220 °C (428 °F), mold temperature: approx. 50 °C (122 °F)] into samples 2 mm (approx. 0.08 inches) in thickness.

    Extrusion molding machine􀀁
    A predetermined amount of PELESTAT 300 was dry-blended with PP and the mixture was molded using an extrusion molding machine [die temperature: approx. 220 °C (428 °F)] into sample 100 μm (approx. 3.9 mils) in thickness.

    Method:
    Each sample was kept at 23°C(73°F), 50 % R.H. for 24 hours. Then, the surface resistivity of each was measured using a megohmmeter according to ASTM D 257.

    B. Effect on Surface Resistivity When Washed with Water (Evaluation of Durability of Antistatic Effect) The surface resistivity of the LDPE blended with PELESTAT 230 minimally changes, remaining antistatic even when washed with water. This product imparts a permanent antistatic property that cannot be attained by any other conventional blend-type, low-molecular-weight antistatic agent, which loses its antistatic property after being washed with water approximately three times.

    SANAM Corporation PELESTAT 300 Performance Tests - 2

                                                      Number of Washings with Water (times)

                           Figure 4.Effect on Surface Resistivity When Washed with Water

    Materials and Methods:
    Materials:

    • PELESTAT 300 (5 wt %) / PP
    • PELESTAT 300 (5 wt %) was dry-blended with the PP and the mixture was molded using an injection molding machine [nozzle temperature: approx. 220 °C (428 °F); mold temperature: approx. 50 °C (122 °F)] into samples 2 mm (approx. 0.08 inches) in thickness.
    • Conventional low-molecular-weight anionic antistatic agent (1 wt %) / PP
      A conventional blend-type, low-molecular-weight antistatic agent, a Sanyo Chemical product, was applied. After it was kneaded using a twin screw extruder at approx. 220 °C (428 °F), the kneaded material was molded into samples by using the method described above.

    Method:Each sample was submerged in water and their surfaces were rubbed with a cotton cloth. The samples were dried under reduced pressure [133 Pa (0.02 psi)] at 70 °C (158 °F) for 2 hours and were kept at 23 °C (73 °F), 50 % R.H. for 24 hours. The surface resistivity was measured using a megohmmeter according to ASTM D 257. This process was repeated according to the number of washings with water as described in Figure 4.

    C. Effect of Humidity on Surface Resistivity
    The surface resistivity of the PP blended with PELESTAT 300 minimally changes even in low humidity due to this product’s low dependency on humidity. Conversely, an LDPE blended with any other conventional low-molecular-weight antistatic agent loses its antistatic property in low humidity.

    SANAM Corporation PELESTAT 300 Performance Tests - 3

                                          Figure 5. Effect of Humidity on Surface Resistivity

    Materials and Methods:
    Materials: See Figure 4.
    Method:
    Each sample was kept at 23°C (73°F) at a predetermined humidity for 24 hours. Then, the surface resistivity of each was measured using a megohmmeter according to ASTM D 257.

    D. Effect on Resin Physical Properties
    As shown in Table 1, PELESTAT 300 minimally affects the PP physical properties.

    Property Method PELESTAT 300
    5 wt %) / PP
    PP
    Surface resistivity Ω ASTM D 257 2 × 10^12 > 10^16
    Melt flow rate
    (10 min, 190°C, 21.18 N) g
    ASTM D 1238 12 10
    Tensile strength MPa (psi) ASTM D 638 29 (4200) 28 (4,000)
    Fracture elongation  % ASTM D 638 300 280
    Flexural modulus MPa (psi) ASTM D 790 1,200 (174,000) 1,200 (174,000)
    Izod impact strength (notched) J/m (ft.Ibf/in) D 256 80 (1.5) 80 (1.5)
    Impact resistance Du Pont method J (ft.Ibf) (JIS K 5400) 20 (15) 20 (15)
    Deflection temp. under load
    (0.45 MPa) °C (°F )
    D 648 84 (183) 85 (185)

    Materials and Methods:
    Materials:
    Surface resistivity
    PELESTAT 300 (5 wt %) was dry-blended with the PP and the mixture was molded Under same conditions as described in Figure 4 into samples 2 mm (approx. 0.08 inches) in thickness.

    Melt flow rate
    The above molded materials were cut into pellets, and used as samples.
    Other mechanical properties
    Samples were prepared under the same conditions described in Figure 4 except that the
    predetermined size described in ASTM was applied.
    PP was also molded under the same conditions.
    Methods:
    See the methods described in Table 1.
    (The testing method for surface resistivity is described in Figure 3.)

    E. Dispersibility of PELESTAT 300 in PP
    As shown in Figure 6, PELESTAT 300 is finely dispersed in the PP.

     SANAM Corporation PELESTAT 300 Performance Tests - 4

    Figure 6. Transmission Electron Micrograph of Molding (TEM photo)
    Composed of PELESTAT 300 (5 wt %) and PP

    [Explanation of Photograph]
    Black stripes: PELESTAT 300
    Black particles: Ethylene-propylene rubber component of PP
    Figure 6 is a magnification (approx. 15,000 times) of a section of the PELESTAT 300
    5 wt %) / PP mixture described in Figure 4. This product (black stripes) is dispersed
    in PP (white portion) and works as a conductive network.

    2. Application to Linear Low Density Polyethylene LLDPE
    PELESTAT 300 imparts an excellent antistatic property to the LLDPE.
    This product is highly dispersive in LLDPE and minimally affects its physical properties.

              Table 2.   Effect of LLDPE Physical Properties

    Property Method
    ASTM No.
    PELESTAT 300
    (5 wt %) / LLDPE
    PP
    Surface resistivity Ω D257 5 × 10^12 > 10^16
    Melt flow rate
    (10 min, 190 °C, 21.18 N ) g
    D 1238 11 10
    Tensile strength MPa (psi) D638 8 (1,200) 8 (1,200)
    Fracture elongation % D638 230 240

    Materials and Methods:
    Materials:
    Surface resistivity
    PELESTAT 300 (5 wt %) was dry-blended with the LLDPE and the mixture was molded using an injection molding machine [nozzle temperature: approx. 200 °C (392 °F); mold temperature: approx. 50 °C (122 °F)] into samples 2 mm (approx. 0.08 inches) in thickness.
    Melt flow rate
    The above molded materials were cut into pellets, and used as samples.
    Other mechanical properties Samples were prepared under the same conditions described in Figure 4 except that the predetermined size described in ASTM was applied.
    LLDPE was also molded under the same conditions.

    Methods:
    See ASTM No. described in Table 2.
    (The testing method for surface resistivity is described in Figure 3.)

    Safety & Health

    Hazards Description

    PELESTAT 300 is a polyether-polyolefin block copolymer.
    This product is insoluble in water. This product has no flash point (by COC) below 230 °C (446 °F). UN dangerous goods regulations are not applied to this product.
    Vapor or fume from molten material causes eye and nose irritation. This product has low acute oral toxicity and has no acute dermal irritation. Acute oral toxicity (rat): LD50> 2,000 mg/kg (similar product) Acute dermal irritation (rabbit): Non-irritant (similar product) This product is for industrial use only.