How to control the size of the heat shrinkable tube
来源：发布时间：2019-07-08 10:12:48点击率：
In the production process, the heat-shrinkable tube expands the most difficult process to control, and what is the quality control method used?
Domestic professional manufacturer of heat shrinkable sleeves, in this high elastic state, if the material is applied externally, the melting temperature is between 115 and 135 °C; the initial flow temperature of polyethylene increases with the increase of the irradiation dose. High, for heat-shrinkable tubes, the irradiation dose is generally 100-150kGy. Since the heat-shrinkable tube substrate is a polyethylene multi-component blend system, the material can be in a high elastic state to obtain a high expansion ratio and heat shrinkage force. . As the temperature rises to the melting point, the uncrosslinked polymer transitions from the glassy state to the viscous flow state, and the crosslinked polymer does not viscous and exhibits a high elastic state, which is formed by the cross-linking reaction inside the material. The effect of a three-dimensional network structure. At this time, the corresponding initial flow temperature is about 180 ° C, so the preheating temperature of the heat shrinkable tube should be controlled between the two, that is, about 140 ° C, the material can be elastically deformed, that is, once the external force is eliminated, the material Can return to the shape before the force. Therefore, the precondition for the expansion process to be implemented is that the material is in a highly elastic state, that is, the material should be preheated to its melting temperature to the viscous temperature before expansion.
The PVC heat shrinkable sleeve has a special function of heat shrinkage and can be cut on behalf of customers. It is used for outer covering of various curtain rods, shower curtain rods, hanging rods, mop rods, broom handles, tool rods, telescopic rods, garden tools, struts and other tubular articles. It can also be used for the identification of copper busbars, joints and wiring harnesses of low-voltage indoor busbars, and insulation coating. High efficiency, low equipment investment, and low overall cost. It is used for lighting, LED pin wrapping, and packaging for guitar and bottle mouths. It is a new generation of packaging materials. It can be shrunk when heated above 98 °C, which is convenient to use. The product is divided into two series of 85 °C and 105 °C according to temperature resistance, the specification is Φ2-Φ200, and the product complies with the EU RoHS environmental protection directive. Used in electrolytic capacitors and inductors, the product has good high temperature resistance and no secondary shrinkage, which can be printed on its behalf. It is used for the unit and combination packaging of various rechargeable batteries, and is designed and printed on the basis of civilians, vehicles and military. PET heat shrinkable tube (polyester heat shrinkable tube) greatly exceeds pvc heat shrinkable sleeve from heat resistance, electrical insulation performance and mechanical properties. More importantly, the environmental performance of PET heat shrinkable tube is higher than EU RoHs directive standard. It can meet the environmental standards of Sony SS-00259. PET heat shrinkable sleeve is non-toxic, easy to recycle, has no toxic effects on the human body and the environment, and is more environmentally friendly. Contains no (Cd), lead (Pb), mercury (Hg), hexavalent chromium (CrVI), polybrominated biphenyls (PBBs), polybrominated biphenyls (PBBEs/PBDEs), polychlorinated biphenyls (PCBs), polychlorinated terphenyls (PCT) , Class 1 environmental management banned substances such as polychlorinated naphthalene (PCN), are electronic capacitors, inductors and other electronic components, high-end rechargeable batteries, toys and medical devices, can fully meet export requirements.
Domestic professional manufacturer of heat shrinkable sleeves, in this high elastic state, if the material is applied externally, the melting temperature is between 115 and 135 °C; the initial flow temperature of polyethylene increases with the increase of the irradiation dose. High, for heat-shrinkable tubes, the irradiation dose is generally 100-150kGy. Since the heat-shrinkable tube substrate is a polyethylene multi-component blend system, the material can be in a high elastic state to obtain a high expansion ratio and heat shrinkage force. . As the temperature rises to the melting point, the uncrosslinked polymer transitions from the glassy state to the viscous flow state, and the crosslinked polymer does not viscous and exhibits a high elastic state, which is formed by the cross-linking reaction inside the material. The effect of a three-dimensional network structure. At this time, the corresponding initial flow temperature is about 180 ° C, so the preheating temperature of the heat shrinkable tube should be controlled between the two, that is, about 140 ° C, the material can be elastically deformed, that is, once the external force is eliminated, the material Can return to the shape before the force. Therefore, the precondition for the expansion process to be implemented is that the material is in a highly elastic state, that is, the material should be preheated to its melting temperature to the viscous temperature before expansion.
The PVC heat shrinkable sleeve has a special function of heat shrinkage and can be cut on behalf of customers. It is used for outer covering of various curtain rods, shower curtain rods, hanging rods, mop rods, broom handles, tool rods, telescopic rods, garden tools, struts and other tubular articles. It can also be used for the identification of copper busbars, joints and wiring harnesses of low-voltage indoor busbars, and insulation coating. High efficiency, low equipment investment, and low overall cost. It is used for lighting, LED pin wrapping, and packaging for guitar and bottle mouths. It is a new generation of packaging materials. It can be shrunk when heated above 98 °C, which is convenient to use. The product is divided into two series of 85 °C and 105 °C according to temperature resistance, the specification is Φ2-Φ200, and the product complies with the EU RoHS environmental protection directive. Used in electrolytic capacitors and inductors, the product has good high temperature resistance and no secondary shrinkage, which can be printed on its behalf. It is used for the unit and combination packaging of various rechargeable batteries, and is designed and printed on the basis of civilians, vehicles and military. PET heat shrinkable tube (polyester heat shrinkable tube) greatly exceeds pvc heat shrinkable sleeve from heat resistance, electrical insulation performance and mechanical properties. More importantly, the environmental performance of PET heat shrinkable tube is higher than EU RoHs directive standard. It can meet the environmental standards of Sony SS-00259. PET heat shrinkable sleeve is non-toxic, easy to recycle, has no toxic effects on the human body and the environment, and is more environmentally friendly. Contains no (Cd), lead (Pb), mercury (Hg), hexavalent chromium (CrVI), polybrominated biphenyls (PBBs), polybrominated biphenyls (PBBEs/PBDEs), polychlorinated biphenyls (PCBs), polychlorinated terphenyls (PCT) , Class 1 environmental management banned substances such as polychlorinated naphthalene (PCN), are electronic capacitors, inductors and other electronic components, high-end rechargeable batteries, toys and medical devices, can fully meet export requirements.
