480°C
Endless Felt Belts · Rubber
Sanforizing Rubber Belt
Rated to 130°C
An endless natural rubber belt for the compression unit of sanforizing machines.
Rated to 130°C, hardness 40±2. Made to your machine size.
Sanforizing rubber belt
Sanforizing rubber belts for compressive shrinking machines
The rubber belt squeezes woven fabric so it shrinks before it is ever washed.
This endless belt is made from 100% natural rubber, Malaysian ribbed smoked sheet.
It runs in the compression unit of rubber-belt sanforizing machines, and is also called a zero-zero shrinking belt.
130°C
Maximum temperature
40±2
Hardness
50–72mm
Thickness
6–9 months
Service life
Specifications
Sanforizing rubber belt specifications
Every belt is made to your machine.
Thickness can be adjusted.
| Type | Endless rubber belt |
|---|---|
| Material | 100% natural rubber (Malaysian ribbed smoked sheet) |
| Temperature | Up to 130°C |
| Hardness | 40±2 |
| Inner diameter | 1262mm |
| Circumference | 3962mm |
| Width | 1500–2300mm |
| Thickness | 50–72mm, or to order |
| Tension | 2.3% (305mm → 312mm) |
| Pressure | Under 2.5 bar |
| Grinding interval | Every 500,000–1,000,000 metres of fabric |
| Service life | 6 months or about 10 million yards at high load; up to 9 months at low load |
| Application | Rubber-belt sanforizing (compressive shrinking) machines |
| Size | Made to order |
| Brand | PD |
| Origin | Guangdong, China |
Send us your machine size
Give us the roller diameter, working width and fabric you run. We come back with the belt size and price within one working day.
Why this belt
Why choose our sanforizing rubber belt
01
Even shrinkage
The belt is built endless, so there is no joint to print a line across the cloth. Every metre of fabric meets the same rubber surface, so the shrinkage is the same from selvedge to selvedge. That is what keeps residual shrinkage inside tolerance from one batch to the next.
02
Takes steam and pressure
In the compression unit the belt takes hot steam and squeeze at the same time. Vulcanised natural rubber at 40±2 hardness holds its shape under that load, up to 130°C and under 2.5 bar. It recovers between cycles instead of flattening out, so the squeeze stays the same all shift.
03
Regrindable
The running surface is ground true again rather than scrapped. Grind every 500,000 to 1,000,000 metres of fabric and the belt keeps shrinking evenly. On that schedule a belt runs about 6 months at high load and up to 9 months at lighter load.
Application
Where sanforizing rubber belts run
The belt runs in the compression unit of rubber-belt sanforizing machines.
It pre-shrinks cotton and blended woven fabric.
It is especially suited to denim and heavy fabric.
Running and care
Getting the most from a rubber belt
01
Set the tension
Stretch the belt 2.3%: a 305mm mark becomes 312mm.
Keep the pressure under 2.5 bar.
Too little tension and the belt slips. Too much and it stretches out of shape.
02
Regrind on schedule
Grind the surface every 500,000 to 1,000,000 metres of fabric.
A true surface keeps the shrinkage even.
Grinding also takes off the glaze that builds up on the running surface.
03
Plan the replacement
At high load a belt lasts about 6 months, or 10 million yards.
At low load it can run up to 9 months.
Order the next belt before the old one runs out, so the line is not left waiting.
Need a replacement belt on a deadline?
Tell us when the line stops. We quote the belt, the grinding interval and the delivery date together.
Our factory
How a sanforizing rubber belt is made
Nine steps, from raw natural rubber to the crate.
Grinding and polishing are the steps that decide how the belt runs.
01
Plasticising
Raw natural rubber is plasticised until it softens and mixes evenly.
02
Rubber build-up
The rubber is built up layer by layer to the thickness you order.
03
Rubber filtering
The compound is filtered, so no hard specks are left in the belt.
04
Vulcanising
Heat and pressure vulcanise the belt and set the hardness at 40±2.
05
Grinding
The running surface is ground true, so thickness is even across the width.
06
Polishing
Polishing finishes the surface, so the fabric comes off it unmarked.
07
Inspection
We check thickness, hardness, width and circumference before release.
08
Packing
The belt is wrapped and crated for sea freight.
09
Delivery
We ship to your port and send the documents.
Quality
ISO 9001 certified felt factory
We work to an ISO 9001 quality system.
QC staff check the raw fibre and every production step.
Certificates are on file and we can send copies with your quote.
If you need a test report with an order, ask for it before production starts.
Packing
How rubber belts are shipped
Each belt ships in a wooden crate.
The crate protects it from knocks and crushing in transit.
Tell us if your forwarder needs different packing and we will pack to that.
Support
Help before and after you order
01
Made to your machine
Send us the machine make, the roller diameter and your working width. We build the belt endless to that size, with the thickness anywhere from 50 to 72mm. Tell us the fabric you run and we confirm the thickness before production starts.
02
Matched to the heat
A rubber belt only shrinks evenly if it is tensioned right. We send the 2.3% stretch figure and the 2.5 bar pressure limit with every belt, so your team can set it up the first time. If your compression unit works to different figures, tell us and we check them against the belt.
03
Help with fitting
Ask us how to measure the old belt and how to fit the new one. We go through the steps before the change, from cooling the machine down to cleaning the rollers. We can also plan the next replacement with you, so the line is never left waiting on a belt.
FAQ
Sanforizing rubber belt FAQ
What do you need to quote?
The machine make, the belt width, inner diameter and thickness.
Add your delivery address for shipping.
How often should the belt be ground?
Every 500,000 to 1,000,000 metres of fabric.
How long does a belt last?
About 6 months, or 10 million yards, at high load.
Up to 9 months at low load.
How do I change the belt?
Turn off the power and steam and let the machine cool.
Loosen the compression unit, remove the old belt and clean the rollers before fitting the new one.
How does ordering work?
We send a quote and an invoice. Production starts when payment arrives.
The balance is paid before shipment.
Which payment methods do you accept?
T/T, PayPal, Western Union and L/C.
Ask us if you need another method.
PD FELT · Foshan, China
Need a custom Sanforizing Rubber Belt?
Tell us the machine, the position on the line and the temperature. We make the felt to your drawing.