Non-Heat-Shrink Mylar Tube for Stable Sleeve Assembly

WELLELE manufactures non-heat-shrink Mylar/PET film tubing for insulation, covering, separation and component protection without an intentional heat-recovery step. Non-shrink, stable and low-shrink constructions can be reviewed according to the film and application.

Reliable assembly depends on the minimum tube ID, complete component OD range, wall thickness, cut length, end condition, roundness, static behavior and packaging. For automatic insertion, these process details are often as important as the nominal material.

Non-Heat-Shrink Mylar Tube Key capabilities

  • Stable non-heat-shrink PET film sleeve construction
  • Custom ID, wall, length and length tolerance
  • Manual and automatic assembly review
  • Packaging for roundness, static and cut-end protection

Use heat shrink Mylar tube when:

When is a non-shrink sleeve the correct choice?

Requirement Direction Engineering focus
Direct sleeve installation without heating Use this product ID clearance and insertion method
Heat-sensitive component Use this product or another stable material Operating and assembly temperature
Automatic feeding Review samples and packaging Ovality, static, length and cut ends
The tube must grip after heating Use heat-shrink tubing Recovery and heating process
Bolt or fastener sleeve Review fit and retention Thread diameter, burrs and removal force

Assembly Risks to Review Before Production

Tube Cannot Be Installed

Likely Cause Check First Engineering Response
ID too large Component min OD Reduce ID or review fit
Part OD variation Min/max OD Define true OD range
No retention requirement defined Pull-off force
Vibration or transport movement Packaging/use condition Test sleeve movement

Tube Slides or Feels Loose

Likely Cause Check First Engineering Response
ID too large Component min OD Reduce ID or review fit
Part OD variation Min/max OD Define true OD range
No retention requirement defined Pull-off force Add retention target
Vibration or transport movement Packaging/use condition Test sleeve movement

Cut-End Lifting or Layer Opening

Likely Cause Check First Engineering Response
Cutting blade issue Blade condition Replace or adjust blade
Wall construction stress Tube structure Review winding/bonding
Short length instability Cut length Use support or fixture
Handling damage Packing Improve packing method
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Automatic Feeding Jams

Likely Cause Check First Engineering Response
Tube ovality Max/min ID Review packing and wall
Static or sticking Feeding method Change packaging or handling
Cut-end lifting End appearance Improve cut process
Length variation Length tolerance Tighten cutting control
Tube too soft Wall thickness Review wall build

What the customers see

For Bolt and Fastener Sleeve Applications

When non-heat-shrink Mylar tube is used as a bolt or fastener sleeve, sizing should be based on thread major diameter, protected length, installation force, retention requirement and removal force.

Parameter Why It Matters
Thread major diameter Controls sleeve ID
Thread profile Affects cutting or damage risk
Protected length Defines tube length
Retention force Prevents sleeve loss during transport
Removal force Prevents difficult removal
Burr condition Prevents film damage

Making the app managable

Fit Validation Before Production

For non-heat-shrink Mylar tube, sample validation focuses on assembly fit, cut-end condition, sleeve position, length coverage and packaging stability.

1. Review component drawing or sample
2. Confirm min/max component OD
3. Select trial tube ID and wall thickness
4. Cut sample lengths
5. Test manual or automatic assembly
6. Check fit, sleeve movement and end condition
7. Confirm production specification

Parameter Custom capability Why it matters
Material PET/polyester film; Mylar when traceable Insulation and document scope
Shrink behavior Non-shrink or controlled low-shrink options Dimensional stability in process
Inside diameter Custom Insertion clearance and looseness
Wall thickness Custom Stiffness, insulation and cut quality
Cut length Custom Coverage and automated positioning
Length tolerance Project specific Feeding and assembly repeatability
Roundness/ovality Can be specified Entry reliability after packaging
Cut end Clean/open/no lifting by agreement Prevents jams and component damage
Packaging Bag, tray, compartment or other custom form Controls deformation and static

It is a Mylar or polyester film-based tube used as a stable sleeve without intentional heat recovery after installation.

Use the full component OD range. The tube ID must allow installation over the maximum OD while avoiding excessive looseness over the minimum OD.

Yes, but ID consistency, cut length, cut-end quality, ovality, static behavior and packaging method should be reviewed.

Common causes include oversized ID, unmeasured component minimum OD, part variation or no defined retention requirement.

Possible causes include ovality, cut-end lifting, static, length variation, soft wall construction or unsuitable packaging.

Yes, selected non-heat-shrink Mylar tubing can be reviewed for bolt sleeves. Thread diameter, sleeve length, retention and removal force must be defined.

Select non-heat-shrink Mylar tube from the complete component dimensions, operating conditions, manufacturing process and acceptance criteria. Use samples to confirm fit and function before volume production

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