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Heat Shrink Tubing

Heat shrink tube manufacturer

 

Professional heat shrink tube manufacturer, producing materials such as polyolefin (PO), polyvinyl chloride (PVC), fluororubber (FKM), polyvinylidene fluoride (PVDF), fluoropolymers (such as PTFE),PE,EVA,PET, silicone, etc. Our company has 10 heat shrink tube extruders, 5 heat shrink tube oil expansion machines, and 12 heat shrink tube dry expansion machines. Twenty multi-functional pipe cutting machines are set up to ensure production, with a daily output of over 500,000 meters. Complete certification. Environmental protection: "RoHS2.0" requiremen.Flame retardant grade: UL94 V-0. Special customization available. Applications: Halogen-free, environmentally friendly, flame retardant, soft. Mainly used for insulation protection of components, terminals and wire joints, wire harness binding, marking and identification, mechanical protection, etc

Heat shrink tube performance

 
01
 

Shrinkage performance

Shrinkage: usually radial shrinkage (common 2:1, 3:1, 4:1, up to 6:1), axial shrinkage is generally small (<10%).

For example, 2:1 indicates that the diameter shrinks to 50% of the original diameter after heating.

 
02
 

Electrical performance

nsulation strength: ≥15 kV/mm (high pressure heat shrink pipe can reach more than 20 kV/mm).Volume resistivity: ≥10¹² Ω·cm (quality materials can reach 10¹⁴ Ω·cm).Withstand voltage: from 600V to 35kV depending on the grade.

 
03
 

Mechanical properties

Tensile strength: ≥10 MPa (ordinary type) to ≥30 MPa (high performance type).Elongation at break: ≥100%~500% (reflecting flexibility).Wear resistance: Some of the tube surface is specially treated (such as polyamide coating) to enhance wear resistance.

More details can be found on the product details page, or contact a developer to send a solution for your product

 

202503311031451

 

 

First 123 Last
 

Heat Shrink Tubing

 

 

Heat shrink tubing is a thermoplastic tube that shrinks when exposed to heat. When placed around wire arrays and electrical components, heat shrink tubing collapses radially to fit the equipment’s contours, creating a protective layer. It may cover parts of individual wires or bundle entire arrays and protect against abrasion, low impact, cuts, moisture, and dust.

 

 

Performance

 

Property

Test Method

Standard

Tensile strength(Mpa)

ASTM-D 638

≥8.5Mpa

Breaking elongation

ASTM-D 638

≥250%

Operation temperature range

IEC 60216

-55ºC~200ºC

Heat aging/Breaking elongation

168hrs x 250ºC

≥200%

Heat shock

4hrs x 300ºC

No cracking

Disruptive strength

IEC 60243

≥15kV/mm

Volume resistivity

IEC 60093

1x 109Ω.cm

Flame resistance

UL 224 VW-1

Pass

 

 

 

Performance certification

 
   

 

 

 

Product features:

1. Harmful elements, halogen elements passed SGS test;
2. Organotin compounds (tributyltin/triphenyltin), Asbestos Aocompounds, and limit the release of substances - formaldehyde.
3. Use range :-55°C~ 125°C
4. Temperature 70°C, ultra thin type complete shrinkage temperature 110°C, normal type complete shrinkage temperature
120 degrees, axial shrinkage is less than 5%. Soft and flame retardant
6 complete specifications, 0.6mm to 180MM, and can be customized to special specifications
7. Easy to use, with oven and hot air gun heating can shrink
8. Environmental performance in line with SONY and EU ROHS environmental standards

 

Project

The test conditions

The technical requirements

 

 

 

Physical properties:

Tensile strength /MPa

/

≥10.4

Elongation at break /%

/

≥200

Tensile strength after heat aging/MPa

158ºCx168hr

≥7.3

Elongation at break after thermal aging /%

158°Cx168hr

≥100

Thermal shock

250ºCx4hr

≥Don't crack

Low softness

-30°Cx1hr

≥Don't crack

 

 

Electrical properties:

Withstand voltage 150 v, 300 v

UL224

1500V No breakdown

Withstand voltage 600 v

UL224

2500V No breakdown

Breakdown strength /KV/mm

/

≥15

Volume resistivity / ω.cm

/

≥1x1014

 

 

Chemical properties

Copper stability (elongation) /%

158°Cx168hr

≥100

Flame resistance

VW-0/VW-1

pass through

Test method:Standard for Extruded Electrical Tubing UL 224

​

1

Function: wire coat and insulation make the joint ofterminal block and wire insulateddivide the colors Water-proof Protection and insulation

2

Standard color: black, white, red, blue, yellow, green, brown, grey, orange and purple

3

Application: The outer layer of the dual wall heat shrinkable tube with glue has the function of insulation and flame retardant, and the inner layer of hot melt adhesive can buffer mechanical strain and seal performance. It is mainly used in various wiring harnesses, marine wires and cables, and metal pipes that need to be sealed, insulated, bundled and fixed where waterproof, moisture-proof and corrosion-resistant are required. Halogen-free environmentally friendly continuous identification sleeve, widely used in electronics, communications, automobiles, rail transit, construction, public facilities and other fields.

Common ratios for heat shrink tubing include

 

modular-1

2:1 Shrink Ratio

The tube will become half of the original size when any heat is applied. You can also look at this ratio as the original size of the tube is twice as large as the shrunken form.

modular-2

3:1 Shrink Ratio

With a three to one ratio, the tube will become a third of the original size when heat is applied. This means that the original size is three times larger than the shrunken form.

modular-3

4:1 Shrink Ratio

With this size, the tube will be a quarter of the original size when the proper amount of heat is applied. It also means the original size is four times bigger than when it is shrunk.

Heat Shrink Tubing Materials
 

Heat shrink tubing can be manufactured from a wide range of thermoplastic materials and is often combined with additives to enhance specific characteristics. Common materials used for heat shrink tubing include:

Polyolefin

Polyolefin is the most popular material for shrink tubing due to its thermal resistance. It is more expensive than PVC but capable of withstanding temperatures as high as 125-135°C. This property makes it ideal for manufacturing, industrial, and mechanical applications with high operating temperatures.

Adhesive-Lined Polyolefin

To provide a more secure tube that will not slip in critical conditions, manufacturers have created a polyolefin heat shrink tubing with an adhesive inner layer that melts and adheres to the wires and components inside the tube to fill voids and ensure a close fit. An added adhesive offers more support and increased protection from moisture and harsh conditions.

PVC

PVC is less expensive than polyolefin but has a lower temperature threshold of approximately 105°C. PVC is durable, strong, and highly abrasion-resistant. It can be manufactured with high clarity, bright colors, and flame-retardant qualities, making it a highly versatile and cost-effective option for low-temperature applications.

Packaging

Normal

Plastic bag & Carton &

PalletSpecial

Customized packing

 

 
 

Our Certificates

 

2

 

4

 

5

 

productcate-511-400

 

productcate-511-400

 

6

 

 

 

FAQ

 

Q: How to choose heat shrink tool and pay attention to the problem?

Answer. A uses an oven; B uses an industrial hotblower;C uses boling waer, After a lot ofexperiments, we found thatthe heatshrinkable tube producecbyour company shrinks quickly and can save energy for customers. lt is recommended to choose the oven (there are two ypes of sealed hermostat andtunnel oven). The temperature can be set at 120*c~150'c, and the shrink time of large quantities of casings together is about 3~5 minutes; use industriahot air blower The barrel shrinkage time is aeneraly more than 3 seconds, and the hot blower can exceed 200'c athioh temperalures. The blower mouthmust be more than 2cm away from the sleeve to avoid scorching the sleeve: The shrinkage method used in bolling water is mainly because somecustomers'products cannot be soaked in wate* to avoid customers Products are oxidized, such as wires for LCD appliances.A/B two heat shrinkagemethods. For longer sleeves, atention must be paid to the exhaust of the sleeve.it is bestto shrink from one end to the otherto avoid bubbling after theair seal shrinks.

Q: How to store and transport heat shrinkable materials?

Answer: The heat-shrinkable product should be kept away from direct sunlight or the ambient temperature exceeds 60'c during storage andtransportation. When the ambient temperature exceeds 60'c, the heat-shrinkable product may partially shrink

Q: How to accurately detect the inner diameter of the heat shrinkable tube?

Answer; The plug gauge (or mandrel is commonly used, Putthe plug gauge into thetube, There is no gap around itvisually. The mandrel should be easyto putin and outofthe tube.The outer diameler ofthe plug gauge is the inner diameler ofthe casing.The inner diameler value ofthe heatshrinkable ubis usually only kept one digit after the decimal point (in mm), and it is also usefu for proiection only equipment detection.An empirical formula formeasuring he inner diameter of a larger specification casing:inner diameter s folded diameter + 157 (where, folded diameter refers to the width ofthecasing when it is compressed in half

Q: How to accurately detect the wall thickness of the heat shrinkable tube?

Answer: The professional and accurate method uses wall thickness gauges or proiectors to check, which can avoid human error. Heat shrinkage itselhas a certain deqree offlexibility, lt is generally used to usea vernier caliners to measure, but the measurement process needs to be mastered and theweight ofthe method itwill obviously affect the test results. in the heat shrinkable tube wall thickness industry,the average wall thickness is calculated(average wall thickness = (highest point value + lowest point value)/2, and the concentricity rate of its wallthickness is 270%, concentric Rate=lowestDointyalue/hiahest point valuex100%)

Q: How to calculate the axial shrinkage rate of heat shrinkable tube?

Answer: The formula for calculating the shrinkage rate in the axial direction (length direction) ofthe casing: shrinkage rate = length before fulhcontractedlength)before shrinkagex100%.

As one of the most professional heat shrink tubing manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to wholesale heat shrink tubing for sale here from our factory. Contact us for customized service.

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