The Doll Forum

Nintrovert47 wrote: ↑Tue Mar 12, 2024 9:47 pm Styrenic thermoplastic elastomer (TPS, TPE-S) also known as Styrenic Block Copolymers (SBC) are usually described as SBS or SEBS based compounds. They are tri-blocks copolymers containing an elastomeric midblock and polystyrene endblocks. The rubber midblock is typically a polydiene (either polybutadiene or polyisoprene), resulting in the well-known families of SBS and SIS polymers. These products are the first generation of styrenic block copolymers and discovered by Shell Chemical in 1950s.

To improve thermo-oxidative and UV stability, the polybutadiene or polyisoprene rubber block of an SBS or SIS polymer can be hydrogenated to form a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a styrene-ethylene-propylene-styrene block copolymer (SEPS). The double-bonds of SBS which are vulnerable to external influence are then broken. The SEBS polymers demonstrate excellent weatherability, thermal stability and high tensile strength, as well as the characteristics of a non-polar olefinic mid-block. These products are known as second generation of SBC. PHOENIX™ of Phon Tech are compounds mostly based of SEBS or SEPS polymers, some based of SBS polymers.

People are putting this stuff in their mouths, after all.
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Bigdog22 wrote: ↑Fri Mar 08, 2024 9:31 am Is S-TPE butt soft like regular TPE and/or Ultra Soft TPE or does is it more firm like Silicone?

homersexual wrote: ↑Wed Mar 13, 2024 5:26 pm

Nintrovert47 wrote: ↑Tue Mar 12, 2024 9:47 pm Styrenic thermoplastic elastomer (TPS, TPE-S) also known as Styrenic Block Copolymers (SBC) are usually described as SBS or SEBS based compounds. They are tri-blocks copolymers containing an elastomeric midblock and polystyrene endblocks. The rubber midblock is typically a polydiene (either polybutadiene or polyisoprene), resulting in the well-known families of SBS and SIS polymers. These products are the first generation of styrenic block copolymers and discovered by Shell Chemical in 1950s.

To improve thermo-oxidative and UV stability, the polybutadiene or polyisoprene rubber block of an SBS or SIS polymer can be hydrogenated to form a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a styrene-ethylene-propylene-styrene block copolymer (SEPS). The double-bonds of SBS which are vulnerable to external influence are then broken. The SEBS polymers demonstrate excellent weatherability, thermal stability and high tensile strength, as well as the characteristics of a non-polar olefinic mid-block. These products are known as second generation of SBC. PHOENIX™ of Phon Tech are compounds mostly based of SEBS or SEPS polymers, some based of SBS polymers.

So this is an older material addition? If so, is there any information on safety? I cannot find any detailed information from WM regarding the safety of their materials, new or current, but on another site for another brand they show a full range of testing for their TPE, I think including lead content (there wasn't any iirc). I'm very interested in this development and would like to see more direct information on it's composition and any levels (or lack thereof) of potentially unsafe components.

People are putting this stuff in their mouths, after all.

ottar wrote: ↑Wed Mar 20, 2024 11:16 am Do you make S-TPE torsos? For example, an S-TPE torso of the WM 163H?

NoFrillsmoreFrills wrote: ↑Wed Mar 20, 2024 2:37 pm How do I know if it is really S- TPE. How can I control that . I just have to take your word for it, a binding guarantee would be customer-friendly and create trust.

ottar wrote: ↑Wed Mar 20, 2024 11:16 am Do you make S-TPE torsos? For example, an S-TPE torso of the WM 163H?

WM dolls wrote: ↑Mon Mar 25, 2024 4:25 am

All WM TPE dolls can be made with S-TPE, including this WM163H.