HDPE Self-Adhesive Waterproof Membrane Production Line

As an equipment solution from a Chinese waterproof membrane equipment manufacturer, Haiming Machinery's HDPE Self-Adhesive Waterproof Membrane Production Line is primarily used to produce polymer waterproof membranes that can form a reverse-adhesive structure with post-poured concrete. The entire line employs a composite process of HDPE extruded substrate and a non-bitumen-based self-adhesive layer, and can be configured with either a sand-surface or a release membrane structure according to different project requirements.

The production line utilizes automated batching, extrusion molding, corona treatment, precision coating, and online testing systems, making it suitable for large-scale production by waterproof material companies.

Production Process

Main Production Flow

The production process consists of multiple automated steps to ensure stable material thickness and uniform adhesive layer.

Raw material drying and preparation

Automatic batching and mixing system

HDPE substrate extrusion and three-roll calendaring

Cooling and shaping

Corona surface treatment

Hot-melt or non-asphalt adhesive coating

Sand spreading or release film laminatio

Composite pressing

Online inspection (thickness / pinhole / coating)

Edge trimming and tension control

Meter counting winding

Quality inspection and packaging

Process Options

1. Flat Extrusion + Coating Composite Line

Substrate and adhesive layer are manufactured separately.

High equipment compatibility.

Suitable for production of multiple product specifications.

Typical line speed: 10–20 m/min

2. One-Step Co-Extrusion Line

In-mold compounding in a dual extrusion system results in more stable interlayer bonding, making it suitable for large-scale, stable production. However, it also places higher demands on formulation and temperature control.

Main Equipment Configuration

Raw Material Handling System

Automatic feeding and batching system

Vacuum conveying for HDPE resin and additive

Dehumidifying dryer (moisture <0.02%)

Separate storage for base material and adhesive compounds

Typical materials include:

HDPE virgin resin

Carbon black (2–3%)

Antioxidant additives

SBS / SEBS modified adhesive compounds

Tackifier resins and plasticizers

Extrusion and Forming System

Main single or twin screw extruder (150/33 or 180/33)

Output capacity up to 500–800 kg/h

Flat die head extrusion system

Three-roll calendaring unit with temperature control

Corona treatment unit (30–50 kW)

Adhesive coating units can include:

Slot die coating system

Knife coating system

Coating thickness adjustment range:

0.3 – 1.2 mm

Composite and Finishing Section

Sand spreading device (30–60 mesh quartz sand)

Release film unwinding system

Hot pressing composite rollers

Cooling roller system

Automatic edge trimming

Quality inspection equipment includes:

Laser thickness measurement (dual layer detection)

Spark pinhole inspection (30kV)

Adhesive peel strength monitoring

Carbon black dispersion detection

Control system:

PLC control system

Touch screen interface

Production data recording and traceability

Technical Specifications

Application Areas

The HDPE self-adhesive waterproof membrane produced is mainly used in the following engineering scenarios:

Subway tunnel waterproofing

Underground utility tunnel projects

Basement floor slabs and side walls

Urban integrated utility tunnels

Water conservancy project waterproofing

Nuclear power plants and large underground structures

This waterproof membrane is typically used in pre-applied reverse-adhesive waterproofing systems.

Why Choose Haiming Machinery

Manufacturing Experience

Since its establishment in 2007, Haiming Machinery has been engaged in the research and development and manufacturing of waterproof membrane production equipment. Its products cover:

SBS waterproof membrane production lines

PVC waterproof membrane equipment

TPO waterproof membrane equipment

Non-asphalt waterproof membrane equipment

Geomembrane and geogrid production equipment

Factory and Production Capacity

The company's factory is located in Taitou Industrial Park, Shouguang, Shandong Province, and has the capability for complete line design, processing, and installation, providing equipment solutions for enterprises of different sizes.

Environmental Engineering

To address the dust and odor problems generated during the production of SBS waterproof membranes, the company has developed supporting:

Dust removal system

Odor treatment equipment

The treatment efficiency can reach over 90%.

FAQ

What type of adhesive is used in the membrane production?

The production line typically uses non-asphalt-based adhesive formulations, such as SBS or SEBS modified self-adhesive systems, suitable for underground waterproofing membranes.

Can the production line produce sand surface and film surface membranes?

Yes. The HDPE Self-Adhesive Waterproof Membrane Production Line can be configured with:

Sand surface system

Release film surface system for different waterproofing application methods.

What width membrane can the line produce? The standard production width is 2.0m, but the equipment can also be designed to produce 2–4m wide membranes upon request.

Is the production line fully automated? The entire line uses PLC control + HMI interface to achieve automated batching, extrusion, coating, inspection, and winding.