What are the characteristics of the Gypsum board covering paper production line
2026-04-14
The Gypsum board covering paper production line is a special papermaking production line specialized in producing protective paper for the upper and lower surfaces of gypsum board. Its core features include high strength, low elongation, anti permeability, high uniformity, high-speed width, fully automatic, green and energy-saving, and adaptability to gypsum board composite technology.
1、 Process and equipment characteristics
Wide width, high speed, and large production capacity
The mainstream paper machine has a net width of 3.8-6.3m, a working speed of 400-1000m/min, and a daily production capacity of 500 tons per line, with an annual output of 50000-350000 tons.
Multi layer composite molding (surface layer+core layer+bottom layer)
Adopting a triple mesh/long mesh multi cylinder forming machine, layer by layer sizing and gradient dewatering. The surface layer is often made of bleached wood pulp to ensure whiteness and surface strength; The core/bottom layer uses recycled pulp (OCC, waste pulp) to reduce costs, with a strong overall structure and good uniformity.
Precision pulping and pulping control
Accurate mixing, double disc grinding and beating, strict control of tapping degree (25-65 ° SR), ensuring fiber interweaving strength and wet stability.
Strong pressing+multi-stage drying+precise sizing
Vacuum pressing+large roll diameter pressing, sufficient dehydration; Multi column drying cylinder zone temperature control ensures uniform moisture content (6-8%). Internal application of glue (neutral rosin+starch) enhances resistance to gypsum slurry penetration; Surface sizing (modified starch/acrylic acid lotion) enhances surface strength, anti pulverization, and improves surface adhesion.
Full process tension closed-loop control
The whole section variable frequency sub transmission ensures stable tension, no deformation or deviation of the paper web, and continuous paper feeding, ensuring smooth winding and consistent tightness.
High automation and intelligent control
DCS distributed control, QCS quality closed-loop (quantitative/moisture/thickness online detection), automatic roll changing, fault diagnosis, paper breakage alarm. From preparing the pulp to changing the brand with just one click, the entire process is unmanned, with one person monitoring multiple lines.
2、 Product quality advantage (performance of protective paper)
Extremely high dry/wet strength
Longitudinal dry tensile strength ≥ 350N/15mm, wet strength retention rate ≥ 65%, no paper decay, no permeability, and no foaming during composite.
Super stable size
The wet expansion rate is less than 0.2%, the drying shrinkage is controllable, the gypsum board does not warp or deform, and the surface is flat.
High uniformity, no needle holes, no wrinkles
Micro turbulent slurry distribution+vacuum dehydration, with uniform fiber distribution, consistent tightness, and moderate breathability.
Strong bonding with gypsum core
The surface is moderately rough with chemical affinity, and after composite, the paper and gypsum are integrated, with high peel strength and no cracking.
Flame retardant and environmentally friendly
Paper sheet flame retardant (B1 level), synergistic with gypsum A-level non combustible; Formaldehyde ≤ 0.05mg/m ³, no harmful substances.
3、 Production and cost advantages
High efficiency and low labor demand
Continuous high-speed stable operation, 24 hours non-stop; High automation and reduced labor by over 70%.
Flexible raw materials and controllable costs
Can be 100% recycled pulp (OCC/waste paper) or paired with virgin wood pulp; High end uses bleached pulp, low-end uses natural pulp, suitable for different grades.
Energy saving, low-carbon, green and environmentally friendly
Energy cascade utilization, reclaimed water recycling (recycling rate ≥ 80%), odor collection, ultra clean emission of flue gas, and comprehensive utilization of waste residue.
Quick changeover and adaptability to multiple varieties
Fast program switching, capable of producing regular paper, moisture resistant paper, fire-resistant paper, high white paper, grid construction paper, etc.
4、 Industry adaptability
Perfectly matched with gypsum board high-speed production line
The protective paper roll is large (diameter 1.25-3.6m), with few joints and stable paper supply, suitable for 100 meter gypsum board composite lines.
Meet the standards of high-end building materials
Compliant with GB/T 9775, suitable for high-end home decoration, hotels, hospitals, engineering, fireproof board, moisture resistant board, etc.
1、 Process and equipment characteristics
Wide width, high speed, and large production capacity
The mainstream paper machine has a net width of 3.8-6.3m, a working speed of 400-1000m/min, and a daily production capacity of 500 tons per line, with an annual output of 50000-350000 tons.
Multi layer composite molding (surface layer+core layer+bottom layer)
Adopting a triple mesh/long mesh multi cylinder forming machine, layer by layer sizing and gradient dewatering. The surface layer is often made of bleached wood pulp to ensure whiteness and surface strength; The core/bottom layer uses recycled pulp (OCC, waste pulp) to reduce costs, with a strong overall structure and good uniformity.
Precision pulping and pulping control
Accurate mixing, double disc grinding and beating, strict control of tapping degree (25-65 ° SR), ensuring fiber interweaving strength and wet stability.
Strong pressing+multi-stage drying+precise sizing
Vacuum pressing+large roll diameter pressing, sufficient dehydration; Multi column drying cylinder zone temperature control ensures uniform moisture content (6-8%). Internal application of glue (neutral rosin+starch) enhances resistance to gypsum slurry penetration; Surface sizing (modified starch/acrylic acid lotion) enhances surface strength, anti pulverization, and improves surface adhesion.
Full process tension closed-loop control
The whole section variable frequency sub transmission ensures stable tension, no deformation or deviation of the paper web, and continuous paper feeding, ensuring smooth winding and consistent tightness.
High automation and intelligent control
DCS distributed control, QCS quality closed-loop (quantitative/moisture/thickness online detection), automatic roll changing, fault diagnosis, paper breakage alarm. From preparing the pulp to changing the brand with just one click, the entire process is unmanned, with one person monitoring multiple lines.
2、 Product quality advantage (performance of protective paper)
Extremely high dry/wet strength
Longitudinal dry tensile strength ≥ 350N/15mm, wet strength retention rate ≥ 65%, no paper decay, no permeability, and no foaming during composite.
Super stable size
The wet expansion rate is less than 0.2%, the drying shrinkage is controllable, the gypsum board does not warp or deform, and the surface is flat.
High uniformity, no needle holes, no wrinkles
Micro turbulent slurry distribution+vacuum dehydration, with uniform fiber distribution, consistent tightness, and moderate breathability.
Strong bonding with gypsum core
The surface is moderately rough with chemical affinity, and after composite, the paper and gypsum are integrated, with high peel strength and no cracking.
Flame retardant and environmentally friendly
Paper sheet flame retardant (B1 level), synergistic with gypsum A-level non combustible; Formaldehyde ≤ 0.05mg/m ³, no harmful substances.
3、 Production and cost advantages
High efficiency and low labor demand
Continuous high-speed stable operation, 24 hours non-stop; High automation and reduced labor by over 70%.
Flexible raw materials and controllable costs
Can be 100% recycled pulp (OCC/waste paper) or paired with virgin wood pulp; High end uses bleached pulp, low-end uses natural pulp, suitable for different grades.
Energy saving, low-carbon, green and environmentally friendly
Energy cascade utilization, reclaimed water recycling (recycling rate ≥ 80%), odor collection, ultra clean emission of flue gas, and comprehensive utilization of waste residue.
Quick changeover and adaptability to multiple varieties
Fast program switching, capable of producing regular paper, moisture resistant paper, fire-resistant paper, high white paper, grid construction paper, etc.
4、 Industry adaptability
Perfectly matched with gypsum board high-speed production line
The protective paper roll is large (diameter 1.25-3.6m), with few joints and stable paper supply, suitable for 100 meter gypsum board composite lines.
Meet the standards of high-end building materials
Compliant with GB/T 9775, suitable for high-end home decoration, hotels, hospitals, engineering, fireproof board, moisture resistant board, etc.
