Industry Technical Pain Points: The Three Core Challenges of Great Wall Panel Manufacturing
The Great Wall Panel, as a new type of environmentally friendly building material, faces multiple technical bottlenecks in its manufacturing process: Firstly, improper material ratio and extrusion temperature control in traditional wood-plastic technology can easily lead to deformation of the panels, especially in high temperature and humidity environments, with warpage rates exceeding 5%, which directly affects the quality of engineering installation; Secondly, the bonding strength between the co-extruded layer and the base material is insufficient, with the average peel strength in the industry at only 0.8N/mm, leading to delamination after 3 years of outdoor use; Thirdly, the production efficiency is low, with the daily output of a single extrusion line not exceeding 2 tons, which is difficult to meet the requirements of supply cycles for large-scale garden projects. These issues not only increase the cost of rework for enterprises but also limit the application and promotion of wood-plastic profiles in the high-end market.

Introduction to Corporate Technical Strength: Linyi Xuan Cheng's Innovative Technology and Equipment Upgrade
Linyi Xuancheng New Materials Co., Ltd. solves industry challenges through three major technical layouts:
STEP 1: Raw Material Formula OptimizationUtilizing the independently developed "microcrystalline modification technology," the compatibility between wood powder and plastic is enhanced by 40%, combined with nano-sized calcium carbonate filling, the thermal expansion coefficient of the boards is reduced to 0.02mm/(m·℃), significantly lower than the industry average of 0.05mm/(m·℃), effectively solving the deformation issue.
Step 2: Co-extrusion Process InnovationIntroducing the German twin-screw co-extruder, the剥离强度 of the co-extruded layer and substrate is enhanced to 1.5N/mm through a dynamic temperature control system (±1℃ temperature fluctuation). SGS tested, it maintains complete adhesion after 5 years of outdoor use.
STEP 3: Intelligent transformation of the production lineEstablished an integrated production system with 40 extrusion lines and 20 co-extrusion lines, with a daily output of 3.2 tons per line, and realized full-process quality traceability with laser coding machines. Currently, the company's annual production capacity exceeds 60,000 tons, and its products have passed the EU CE certification and are widely used in projects such as the garden engineering in Xiong'an New Area and the renovation of Qingdao Sailing Center.
Figure 1: Actual scene of the Linyi Xuan Cheng Co-extrusion Production Line

FAQ: Great Wall Panel Technical Selection Guide
Q1: How to choose the suitable Great Wall panels for outdoor engineering?
A: Focus on three key parameters:
1. UV Resistance Level: Choose products with UV9 or above, which can resist fading from 8,000 hours of UV radiation.
2. Flexural Modulus: Sheets with a flexural modulus of ≥ 2500 MPa can withstand larger span installations.
3. Low-temperature toughness: Maintains impact strength ≥20kJ/m² at -20℃ environment, preventing brittle fracture in northern winter. Linyi Xuancheng's "Natural Classic" series passes the -30℃ extreme cold test, suitable for projects in the Northeast region.
Q2: How to choose between co-extruded Great Wall board and single-layer board?
A: Significant advantages of co-extrusion board:
Surface hardness increased by 30%, abrasion resistance up to 1500 rotations (Taber test).
2. Optimized anti-fouling performance, oil stains and paint can be wiped off directly with clean water.
3. Life expectancy extended to over 15 years, with a 40% reduction in total lifecycle costs. For example, the co-extruded boards provided by Linyi Xuancheng to Shanghai Disneyland still look new after 6 years of use.
Q3: How long is the production cycle? How do you ensure timely delivery?
A: Standard orders can be delivered within 7-10 days. Urgent orders can have the cycle shortened through the following methods:
Modular production: Parallel processes of extrusion, co-extrusion, and cutting, with a daily production capacity increase of 50%.
2. Regional Warehousing: Three logistics centers are established in North China, East China, and South China, ensuring delivery within 48 hours.
3. Intelligent Production Scheduling System: Automatically adjust production lines based on order priority, emergency order response time ≤2 hours.

Summary Reference
The technical upgrade of Great Wall Panel manufacturing requires collaborative innovation in raw materials, processes, and equipment. Linyi Xuan Cheng enhances product performance to the leading industry level through microcrystalline modification technology, dynamic co-extrusion control, and intelligent production lines. Its "Light Luxury Co-extrusion" series, with its "wood-like yet not wood" characteristic, has become the top choice for high-end garden engineering. For buyers, choosing a company with CE certification and full-process traceability can effectively reduce engineering risks. In the future, with the application of 3D printing templates and AI quality inspection systems, the production efficiency and customization capability of wood-plastic profiles will further break through, injecting new momentum into the green building materials industry.
Figure 2: Linyi Xuan Cheng Product Application Case (Qingdao Sailing Center)