Selection of RPSexdoll materials must consider compatibility of materials, range of joint mobility and maintenance cost. Thermoplastic elastomer (TPE) has a surface friction coefficient of 0.6-0.8, where it is recommended to use Modal fiber (tensile strength ≥18N/5cm) or silk (density ≤30g/m²) material to avoid the use of dyes with color fastness <4 causing dyeing permeability >15%. Japanese Dollfie Dream official statistics show that clothing shoulder width should be 1.2-1.5cm more than the true doll size (±0.3cm tolerance error), or long-term usage would increase TPE material tensile deformation rate to 3.8%. For the silicone RPSexdoll, the pressure at the garment seam should be controlled to ≤0.4MPa, or the high-frequency friction (≥5 times/day) would increase the incidence of surface micro-cracks by 27%.
In functional design of clothing, the intelligent temperature control system unveiled at the 2023 Tokyo Doll Show proves that the integrated carbon fiber heating wire (power 8W/m²) can increase RPSexdoll body surface temperature from 20 ° C to 36 ° C in 10 minutes, and the power consumption is 0.015kWh/hour, which is 62% energy-saving compared with the traditional electric blanket. German Doll Sweet company statistics show that the use of magnetic buttons (300-500 gauss magnetic strength) instead of traditional zippers, can increase the effectiveness of removing and putting on 40%, and avoid metal parts scratch risk reduced by 89%. The report of the foundry test in Dongguan, China showed that the silver ion antibacterial fabric (≥50ppm concentration) was able to inhibit the microorganism growth rate by 92% and extend the service life of the doll’s internal skeleton by 23% (material stainless steel 304).
As for clothing maintenance costs, the risk of dye migration in dark clothes (color depth L* value ≤25) is 3.2 times that of light-colored clothes, it is recommended that each wearing time should not be more than 72 hours, and using neutral detergent below 30℃ when washing (pH 6.5-7.5), otherwise the hardness of the TPE surface will increase by 5 Shore A. According to a customer questionnaire survey conducted by RealDoll in the United States, the average budget for a single garment is 80−150, and using laser cutting technology (accuracy ±0.1mm) can increase the fabric utilization rate from 68% to 92%, reducing the scraps’ waste by $3.5/piece. It should be noted that when lace decorations (linear density ≥200D) come into contact with silicone, the generation of friction heat can reach up to 45 ° C, which may accelerate the material’s aging rate by 1.8 times.
Smart clothing technology, South Korea Synthetics Lab developed pressure sensing garment embedded 1200 micro sensor (0.1 N/cm squared resolution), real time clothes pressure distribution measurement of rpsexdoll when local load is above a safe limit (chest 1.2 kPa or less, Joint ≤2.5kPa) automatic alarm. The 3D weaving technology unveiled at CES 2024 achieves 300% garment ductility through a 600 needles/inch density, perfectly following the motion Angle of each part of the doll (such as the 140° maximum hip bend). The UK’s proprietary temperature and humidity control technology of Abyss Creations uses phase change materials (180J/g of heat storage density) to ensure the inside humidity of the garment is controlled within 45%-55%RH and prevents TPE water absorption and expanding rate from more than 0.7%.
From the perspective of market trends, the RPSexdoll clothing customization industry will be 230 million US dollars in 2023 and the smart clothes will occupy 18% from 5% in 2020. The Japanese company Doll House nano hydrophobic surface technology (contact Angle ≥150°) raises the liquid resistance permeability of clothing to 99%, and the cleaning cycle is extended from 3 days to 2 weeks when using the RPSexdoll. French Lucent Designs’ LED optical fiber clothing (luminous flux 800lm/m) can perform 256 color dynamic adjustment with the Bluetooth 5.0 module, but it should be noted that its working temperature should be controlled at -10℃ to 50℃, which may lead to the increase of the TPE softening and deformation rate by 1.3%. Cost-benefit analysis identifies that the use of modular clothing systems (50 basic + 20 functional components) is a cost-saver by 35% in terms of long-term maintenance costs over the traditional total design, and this is very much preferred for users who need intensive replacement cases.