Insultab: Tubing Experts - 800.468.4822
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INSULTAB’S TUBING

Insultab’s Business Is Tubing and Only Tubing!

Insultab manufactures flexible, general purpose, non-shrinkable tubing and flexible and semi-rigid heat shrinkable tubing under the most stringent manufacturing controls.

HOW IS TUBING MADE?

EXTRUSION

Using Premium Grade 100% virgin materials, computerized mixers formulate precise compounds which will meet specific application requirements: multi-wall adhesive lined, standard and custom matched colors, standard and custom finishes, flame retardancy, UV resistance.

The compounds are heated to the melting point and extruded (pushed) through dies to form self-supporting, hollow tubes, similar to straws. The tubing is extruded in specific diameter sizes and wall thicknesses. The material is then cooled.The tubing now has a precise Inside Diameter (I.D.) size and a specific Wall Thickness. Non-shrinkable tubing is used in this form.

HOW IS HEAT SHRINKABLE TUBING MADE?

CROSS-LINKING - IRRADIATION

Extruded tubing has a specific Inside Diameter (I.D.) size. Heat shrinkable tubing is made of special compounds that impart a memory of the original, extruded I.D. size to the tubing. Radiation cross-linking converts the tubing’s compound from a thermoplastic (meltable) material to a thermoset (non-meltable) material. Cross-linking significantly improves the tubing’s physical properties: improved resistance to heat, flame and mechanical abrasion and extends the storage shelf–life of the tubing.

EXPANSION

Using proprietary expanding machinery, the tubing is reheated to a specific temperature and expanded from one to three times the original extruded I.D. size. During this process, as the diameter of the tubing is expanded, its wall thickness is reduced – similar to blowing up a balloon. Computerized monitoring equipment ensures that the measurements of the Inside Diameters, Outside Diameters and Wall Thicknesses meet exacting specifications.

Heat shrinkable tubing is sold in its Expanded I.D. (Inside Diameter) size.

Insultab manufactures tubing in Expanded I.D. sizes of 3/64" up to 4".

WE ARE THE RECOGNIZED EXPERTS AT EXPANDING LARGE DIAMETERS.

VALUE-ADDED SERVICES

CUSTOM CUT LENGTHS

On-line, high speed cutting, done during the manufacturing process as the material is coming off the extruders and expanders, provides perfectly straight lengths with no curvature.

Insultab’s in-house, engineered, close-tolerance cutting operations ensure square, burr-free cuts, with tight tolerances for automated assembly operations. Medical Grade heat shrinkable tubing products are custom cut in our Clean Room environment.

CLICK here to view cutting information and the CUT LENGTH TOLERANCE CHARTS

CUSTOM PRINTING

In-house, state-of-the-art printing equipment will brand and identify your tubing. We print one-sided or double-sided logos, company names, contact information, directions, cable capacities, part numbers, warnings, pictures, flow directions, cable capacities, dates, serial numbers, Military Specifications, and more, directly on your tubing and markers in a variety of ink colors.

  • We can print on any type and any size of heat shrinkable tubing and non-shrinkable tubing / sleeving
  • Our printing is extremely attractive, durable and will not rub off
  • We can print high resolution logos
  • Choose from standard or custom color inks
  • Our printing meets Mil-Spec
  • We have USP Class VI inks for printing on Medical Tubing and Medical Heat Shrinkable Tubing
  • We can print on either one side or both sides of the tubing
  • Our printing is economical and can be done very quickly
CUSTOM PACKAGING

Insultab products are either coiled onto standard size spools, cut to standard lengths or customized to meet specific requirements.

We will provide custom packaging according to customers’ requirements for:

  • Custom put-ups
  • Special spools
  • Bar coding for product identifying
  • Private labeling
STANDARD PACKAGING
  • Insultab’s standard products are available on standard size spools or cut to standard lengths, as shown on our products’ data sheets
  • We have standard kits, assortments and mini-spools made from a variety of tubing materials
  • Our warehouse maintains an unmatched on-the-shelf inventory of standard products which are available for immediate delivery

HOW DOES HEAT SHRINKABLE TUBING WORK?

Applying heat will activate the tubing’s ‘memory’ and cause the expanded tubing to ‘recover’ or shrink down. When fully recovered, the tubing will shrink down to the Recovered I.D.

  • Tubing with a 2:1 shrink ratio will shrink down approximately 50%
  • Tubing with a 3:1 shrink ratio will shrink down approximately 67%

As the tubing recovers, the thinner expanded tubing wall will thicken, similar to what happens when you let the air out of a balloon. If allowed to fully recover, the tubing wall will thicken to the ‘Total Recovered Wall Thickness Nominal’. If the tubing does not fully recover, the wall thickness will be less than the Nominal Recovered Wall Thickness. The thickness of the recovered wall will be proportional to the degree of recovery.

Longitudinal shrinkage, a small reduction in length, will also occur during the shrinking process.

OUR FRIENDLY AND EXPERIENCED CUSTOMER SERVICE REPRESENTATIVES WILL BE HAPPY TO IMMEDIATELY ASSIST YOU IN SELECTING THE SPECIFIC TUBING MATERIAL AND THE EXACT DIAMETER AND ‘CUT LENGTH’ SIZES FOR YOUR APPLICATION!