3 Specialty High Temperature Conveyor Belts for Extreme Temperature Applications

When it comes to applications involving extreme temperatures it is important to give special consideration to the type of conveyor belt being used. High temperatures can cause serious damage to a conveyor belt making selecting the correct thickness of the cover a necessity.

At Sparks Belting, we have 3 specially designed high temperature belts to withstand extreme high or low heat.

1. The SR 25 Red Silicone Belt

SR 25 Conveyor Belt- Sparks Belting

The SR 25 is a thin yet strong belt that is ideal for heat sealing machines, shrink tunnels, automatic weighing and feed conveyors, and food applications. It is made with fiberglass which gives it a very high heat resistance being able to withstand temperatures of -70° to 450° F. The silicone in the belt creates excellent release properties.  The SR 25 high temperature belt should be used on a small diameter pulley.       

2. Multi-Temp Conveyor Belt

Multi-Temp Conveyor Belt- Sparks Belting

The Multi-Temp belt is made from a butyl rubber compound which give this belt it’s high temperature resistance. However, this belt is usually recommended for extreme low temperature applications where cold rooms or freezers are involved. The Multi-Temp conveyor belt can withstand temperatures ranging from -60°-300° F and is considered to be a step up from the SR 25 as it can be utilized on larger diameter pulleys.

3. Tev Tex Conveyor Belt

Tev Tex Conveyor Belt- Sparks Belting

The Tev Tex conveyor belt comes in a 2 ply as well as a 3 ply version and can withstand temperatures of 0°-250° F.  These belts are made out of a Buna-N rubber compound with a Teflon surface cover. The Teflon cover on the Tev Tex belts allows for superior release and easy cleaning of sticky products such as candy, glue, chemicals, and hot plastics. Do not use conveyors with scrapers or where pulleys cause the belt to severely back-bend as this can damage the Teflon.

These 3 specialty belts are designed for extreme temperature applications. 

What Are Plies and Ply Adhesion?

Some conveyor belting is manufactured with one ply of fabric. This fabric layer can be coated with rubber, polymer or elastomer. Yet, most conveyor belting is manufactured using two or more plies of fabric that are adhered to each other by using inner layers of rubber, polymer or elastomer.

In addition, there can be top or bottom surface covers of rubber, polymer or elastomer.

While ply adhesion is defined as the force required to separate two adjoining plies, the reality is that ply adhesion is the force required to pull apart the adhesion that joins the plies. This is measured in pounds per inch or newtons per millimeter.

Conveyor belts operate on equipment that requires flexing over pulleys on the conveyor. This repeated flexing action will stress the ply adhesion of conveyor belts. As a result, it is important for the belt to have adequate ply adhesion to resist ply separation.

(the bottom ply bends over a smaller radius)

The test for ply adhesion is a “pull test” and can be accomplished with a simple clamping device and a fish scale. The test for ply adhesion is usually done on 1” wide x 8” long samples. Multiple samples of the product should be tested and tests should be conducted on the samples from both directions in order to achieve statistical measurements. Belt manufacturing processes can produce different measurements depending on direction of pull

In general terms, ply adhesion of less than 13-lbs per inch of width is considered unacceptably low. Ply adhesion of more than 50-lbs per inch of width is considered very high and can create challenges in belt fabrications where the plies need to be separated manually.

Synthetic fabrics (i.e. polyester, nylon) are often treated with RFL (resorcinol formaldehyde latex) during manufacturing in order to increase the ply adhesion because, without this treatment, the synthetic fabrics are too smooth and too resistant to effectively absorb the polymer, elastomer or rubber in a manner that achieves acceptable ply adhesion. Cotton, by contrast, is coarser and more absorbent, therefore not requiring RFL treatment to achieve acceptable ply adhesion.

Examples of Minimum Adhesion Standards in Sparks’ Belts

  • 14-lbs/inch Untreated Polyester- Poly Flake, Sno Cone, TevTex 22M & 32M
  • 18-lbs/inch Untreated Cotton/Nylon – HSW, 144 TevTex
  • 18-lbs/inch Untreated Cotton Polyester – 28 NOS, Nytop
  • 22-lbs/inch RFL Treated Polyester Econo- Rough Black, Food King 3W
  • RFL Treated Polyester/Nylon- 3XLN, 143 Ruff Tex, 415-N, Food King 1W

How V-Guide Strips Can Help with Belt Tracking

Dotted V Guide Strips

To assist with positive tracking, a guide strip(s) is often used on the pulley side of conveyor belts. V–guides are the most common shapes used. However, square and rectangular shapes are also available. In addition, Sparks has designed and developed round dot-guides for traveling over very small pulleys.

.Tracking assistance is often required on:

  • Short, wide conveyors
  • Conveyors with side-loading
  • Reversing conveyors

Guide strips will not guarantee tracking success on a conveyor or conveyor belt that is poorly manufactured or lacking dimensional accuracy. The conveyor system and conveyor belt should be manufactured to reasonably track by normal means so that the use of guide strips can further ensure trackability.

The conveyor pulleys, bed and/or idler rollers should have an opening that is 1/4” wider and 1/16” deeper than the guide strip on the conveyor belt. Or conversely, the guide strip furnished on the conveyor belt should be 1/4” narrower and 1/16” shallower than the opening in the pulley, bed and/or idler rollers of the conveyor system. Guide strips are intended to improve tracking. They are not designed to drive the belt!

In general, a larger pulley is required when guide strips are used in conjunction with the belt. Smaller sized guide strips will operate over smaller pulleys better than larger guide strips. Guide strips made of softer durometer materials (i.e. PVC) will operate over smaller pulleys better than harder durometer materials (i.e. Polyurethane). Notched or segmented guide strips will navigate smaller pulleys better than solid guide strips.

Guide strips can be supplied down the center of the bottom of the conveyor belt or off-center to reduce wandering (side to side movement).

While it seems logical that two guides are better than one, it isn’t always true! Two guide strips require more precision in the conveyor design and in the placement of the guides on the belt. However, when two guide strips are required, the critical dimension is the center to center distance of the guide strips from each other. This is far more accurate (due to width tolerances in belting) than measuring from each edge of the belt to the center of each guide strip!

The Purpose of Textiles in Conveyor Belting

Conveyor belts are the driving force in conveying operations. There are many different types and materials for the abundance of applications in the market. However, there are a few different textiles that serve an important purpose in conveyor belting.

Purpose of Textiles in Conveyor Belting

  • Provides Strength for Tensioning
  • Provides Strength for Handling the Load
  • Adds Rigidity or Stiffness, “Gives it Body”
  • Improves Mechanical Fastener Retention
  • Improves Wear Against the Conveyor Bed
  • Reduces Sliding Drag on Product or Conveyor Bed

Types of Textiles/Fibers Used in Conveyor Belting

Natural:

Cotton & Wool

Solid woven cotton is often used in baking applications where belts must “breathe”, absorb, and/or handle warm products. It is also used in applications to handle warm, green rubber products. Cotton is used in length, width, or in both directions of multiple plied conveyor belting to increase the bulk of the overall product on applications which require resistance to impact without requiring high strength.  Most commonly, it is placed either on the top or bottom ply of multiple plied belts to provide lower drag against the conveyor bed or some conveyed products – like cartons.

Characteristics & Properties

  • Moderate Strength
  • High Bulk – a course, thick fiber
  • High absorbing
  • Low modulus – high elongation
  • Low cut and abrasion resistance
  • Moderate temperature resistance
  • Low mildew resistance

Man-Made:

Synthetic – Aramid, Nylon, Polyester 

Nylon:

A nylon core is used to provide high strength as required in some flour, paper, box, and wood applications for conveying products or transmission of power. It is used as the width fiber (fill yarn) in conveyor belting to increase rip resistance and fastener retention as well as to resist abrasion from building material products.

Characteristics & Properties

  • High Strength
  • High Elasticity – Stretch and Shrink
  • Moderately Absorbing
  • Moderate elongation
  • High Cut and Abrasion Resistance
  • High Mildew Resistance

Polyester: 

Solid woven polyester is used as a durable and low cost option for general conveyance, with specific uses in parcel, package, and baggage applications. Polyester is used in the length (warp), width (fill), or in both directions of the weave as an inexpensive carcass for multiple plied conveyor belting. Spun polyester generates less noise and is used when higher speeds are used on long(er) slider bed applications.

Characteristics & Properties

  • High Strength
  • Low Elasticity – Stretch and Shrink
  • Moderately Absorbing
  • Moderate Elongation
  • Moderate Cut and Abrasion Resistance
  • Low Temperature Resistance
  • High Mildew Resistance

Aramid (Kevlar):

Kevlar is used in glass applications where belts must withstand hot temperatures and retard flames, in heavy applications near industrial furnaces or conveying hot products being discharged from heat processes, and in heavy applications where resistance to high or heavy impact is important.

Characteristics & Properties

  • High Strength
  • High Bulk – A Coarse, Thick Fiber
  • High Modulus – Low Elongation
  • High Flame Resistance
  • High Impact Resistance
  • High Temperature Resistance

Blending of Textiles

A blend of textiles is often used to gain the benefits of a variety of features that provide solutions and enhance belt 

PVC & PU & PVK & PE conveyer belt

We can customize PVC & PU & PVK & PE conveyer belt according to your requirements 

 

Item Heat Resistant Rough Top Portable Conveyer Belt with Best Price
Thickness 0.5-12mm
Width ≤3000mm
Material PVC/PU/PVK/PE
Color Green, white, petrol green, black, grey, dark grey, dark green, sky blue, orange, yellow, transparent, etc
Pattern Smooth, diamond, saw tooth, both way saw tooth, rough top, matt, squire rough top, stripe, dot, lozenge, checker, golf, wave rough top, herringbone, treadmill, mini-grip, crescent, tape, majiang, solid-woven, sort tooth, etc.
No. of Plies 1ply, 2plies, 3plies, 4plies, and so on
Coating’s Feature Antistatic, thicker, harder, deeper, softer, fire-resistant, oil-resitant, cold-resistant, etc.
Fabric’s Feature Flexible, kevlai, felt, low-noise, jogger, cotton
Working Temperature -25/+80 ℃

PU Food conveyor belt

PU Conveyor Belt is produced under advanced technology with improved production material properties. These are designed for changing industrial environmental requirements. It is more efficient & effective compared to PVC Conveyor Belts.

PU Conveyor Belt Origin

We offer imported long-lasting machine friendly PU Belt. PU Conveyor is available in different thicknesses (1, 1.5, 1.75, 2 mm & more) in 1, 2 & 3 ply options. Our PU Conveyor is imported from Switzerland | Germany | Spain | India & China as well.

PU Conveyor Belt Installation

We are conveyor belt stockiest & supplier in Lahore Pakistan from decades. We have installed PU belt in various industries especially in food industries. Industries should install PU Belt if belt carrying products passes closely from heat, cold or cooling heating tunnel. At this place PVC Conveyor is failed or gives small life span. So, it is better to pay little more in one time then to repeated paying less. Replacing also stops production for some time. Most of industries are shifting from PVC to PU. It gives longest life & minor repairs. It is light weight which makes it easy to install.

PU Conveyor Belt Quality

Two types of surfaces are available i.e., Plain MAT and Finished with polyester bottom including inside layer of PU. We can install Carriers Sidewall Conveyor as per specified customer’s requirements like height, width, gap between carriers and offer Belting Joint too.

  • FDA & EU Approved and available in Halal Content too
  • Friendly to products
  • Sealed Edges | Bonded Plies
  • Oil Resistant
  • Durable & Reliable Belt
  • Minor Conveying Costs
  • Easily Clean & Efficient at work
  • Good Abrasion Resistance
  • Suited for both small and large pulley diameter
  • Classically designed for Heat and Cold environment
  • More Shafts grips to reduce slippage
  • Presently available in White, Blue & Green color

Folder Gluer Machine Feeder Belts

Folder Gluer Machine Feeder Belts

Folder Gluer Belts…

Perfect offers Folder Gluer & feeder belts for packaging & gluing machines, box folding & corrugated cardboard industry. These belts exhibit:

  • High co-efficient of friction for exceptional gripping
  • High dimensional stability
  • High resistance to abrasion, oil & solvents.
Technical Specifications
Grade Construction Traction Layer Total Elongation Min Pulley
  Top Cover Bottom Cover   Thickness at 1 % strain Dia
  Material Colour Material Colour   mm N/mm mm
PT-30 NBR Light Green NBR Yellow Polyamide 3.00
3.7
30.00
PT-40 NBR Light Green NBR Yellow Polyamide 4.00
3.9
40.00
PT-50 NBR Light Green NBR Yellow Polyamide 5.00
7.0
60.00
PT-60 NBR Light Green NBR Yellow Polyamide 6.00
7.0
60.00

NBR:    Nitrile Butyl Rubber

We also offer Customized Belts Grades.
All above products can also be supplied in Toray Polyamide Sheet imported from Japan.

 

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