Upgrades Of SMC Shower Trays And Bathroom Wall Panels

Driven by growing demand for prefabricated buildings, old housing renovations, hotel and indemnificatory housing projects, SMC (Sheet Molding Compound) shower trays and bathroom wall panels, the core components of integrated bathrooms, have witnessed comprehensive industrial breakthroughs and undergone profound technological iterations across multiple dimensions.

 

I.Upgraded Material Formulations

 

New-generation resin systems specially developed for sanitary SMC products have been fully upgraded:

Low-VOC eco-friendly base resin：Low-volatile unsaturated polyester is adopted to cut odors generated during production and finished products, with zero formaldehyde emission. It meets the bidding requirements for green building materials and LEED-certified prefabricated projects. Certain formulas incorporate bio-based resin and recycled glass fiber, slashing the product carbon footprint by over 30%.

 

Intrinsic antibacterial modification technology：Inorganic antibacterial agents are directly blended into the SMC sheet substrate, unlike post-sprayed coatings. The antibacterial layer will not peel off due to abrasion. It achieves a 99% antibacterial rate against Escherichia coli and Staphylococcus aureus, and inhibits the growth of common bathroom molds such as Aspergillus niger. It is ideal for high-traffic wet zones including hospitals, nursing homes and hotels.

 

Optimized reinforcement system：Improved glass fiber dispersion process delivers a stable flexural strength of ≥80 MPa, enhanced impact and crack resistance, and permanent deformation resistance for trays under long-term load. UV resistance and damp-heat aging resistance are also upgraded, extending the color retention lifespan to more than 10 years under outdoor and humid working conditions.

 

Balanced lightweight design with high strength：Filler ratios are optimized while maintaining structural strength. Shower trays and wall panels of identical dimensions are 15–22% lighter, lowering costs for transportation, hoisting and floor load-bearing. Direct installation is feasible for old house renovations without floor slab reinforcement.

 

 

II. Innovations in Compression Molding and Mold Technology

 

Molds and compression molding processes serve as core hardware supporting the upgrade of SMC shower trays and wall panels:

 

Nano-mirror polished molds

They deliver Class A smooth surfaces for sanitary ware, directly replicating textures such as imitation marble, terrazzo, sandstone and wood grain. No post-spray painting is required, eliminating paint peeling risks. Wall panels and trays can be matched in uniform color and texture to create a visually consistent bathroom space.

 

Integrated one-step compression molding

SMC shower trays: Flanged water retaining edges, drainage slopes and built-in anti-slip micro-textures are integrally molded, eliminating secondary bonding. The bowl-shaped integrated tray fundamentally eradicates water leakage at joints. Its wet static friction coefficient reaches ≥0.7, complying with anti-slip standards for elderly-friendly facilities.

SMC bathroom wall panels: Large-format whole panels are molded with pre-embedded hardware bases, cable troughs, access panels and storage recesses in one piece. Wall panels have evolved from simple flat decorative boards to functionally integrated panels.

 

III. Innovative Waterproof Assembly Structures

 

Embedded flanged tray structureSMC ：SMC trays are formed with raised upward flanges, into which the bottom ends of SMC wall panels are directly inserted and locked, matched with special sealing strips. This abandons simple glue-only sealing and reduces leakage risks caused by adhesive aging. The flange height is ≥36 mm to form a physical water retaining barrier.

 

Standardized modular quick-assembly joints：Male-female snap-in connections are used between wall panels to cut glue consumption. Complete sets of trays and wall panels are prefabricated in factories and installed via dry construction on site. A single bathroom unit only takes 4–6 hours to install, shortening construction duration by 70% compared with traditional tile laying. No cement mortar work is involved, and the bathroom can be put into use immediately after installation, making it highly suitable for tight-schedule projects such as hotel renovations, indemnificatory housing and makeshift medical facilities.

 

Supports customization in multiple sizes: Compatibility with customized multi-size products

Standard mold bases paired with partial mold modification support both mass engineering orders and non-standard household sizes. Irregular trays and curved corner wall panels can all be integrally compression-molded from SMC.

 

 

IV. Upgraded Surface Functional Performance

 

On top of the dense, non-absorbent base material, new-generation SMC trays and wall panels feature functional surface treatments:

Lotus-effect superhydrophobic surface：A micro-nano composite microstructure enables self-cleaning as water droplets roll off and wash away soap scum and stains. Residues of soy sauce and body wash can be wiped off effortlessly to reduce bathroom cleaning labor. The base material itself does not absorb water, inhibiting soap scum adhesion from the source.

High wear and chemical resistance：Martindale abrasion resistance reaches ≥50,000 cycles. Repeated wiping with daily bathroom cleaners will not damage the surface, which resists dulling after long-term use. It withstands acidic and alkaline bathing chemicals, fitting high-frequency commercial usage scenarios.

 

V. Technological Innovations and Product Upgrades

Manufacturers are upgrading the performance and appearance of SMC products via technological innovation to overcome traditional drawbacks:

 

• Visual upgrade for wall panels：To eliminate the cheap plastic and hollow visual feel common to conventional SMC materials, a fifth-generation wall panel named "Bosheng Ke-Gong Board" has been launched. It adopts imitation stone slab design with marble texture and supports personalized color customization.
• Patented anti-mold technology：Targeting mold growth on the decorative paper of traditional SMC wall panels, an enterprise published a new patent in February 2026. The composite structure combining nano-coating, transfer printing layer and thermal insulation filling layer prevents surface mold growth.

 

VI. Market Applications and Industry Trends

 

Expanding application scenarios：Complete sets of SMC trays and wall panels are widely applied in refined residential housing, indemnificatory housing, hotel renovations, medical and elderly care institutions, as well as bathroom modules for ships and RVs. The old housing renovation market sees remarkable growth: old bathrooms can be directly refitted by replacing tiles without wall demolition, generating less construction waste and shortening construction periods.

 

Two major development directions for the industry

Engineering sector: Standardization, cost reduction and efficiency improvement. Standardized molds and mass production of SMC sheets continuously lower the cost of integrated bathroom components, gradually replacing traditional wet tile construction. Green building material certification becomes a key bonus point for project bidding.

Household sector: Appearance aesthetics plus customized functions. Demand for stone-imitation, matte and solid-color finishes, anti-slip trays for the elderly and antibacterial wall panels rises rapidly.

 

Existing industry challenges： Low-cost inferior SMC products flood the market, featuring insufficient glass fiber content in sheets and overuse of recycled materials, which lead to yellowing, cracking and substandard anti-slip performance. The industry is promoting raw material grading, performance testing and standardized implementation to drive industrial upgrading.