Low-VOC (Volatile Organic Compounds) low-smell automobile double-wall heat shrink tube and preparation method thereof

A double-wall heat-shrinkable tube and low-odor technology, applied to electrical components, conductors, circuits, etc., can solve the problems that double-walled tubes cannot pass VOC and odor level tests, and achieve a good appearance effect

Inactive Publication Date: 2017-05-31
CHANGYUAN ELECTRONICS DONGGUAN +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The double-wall heat-shrinkable tube for automotive wiring harness is divided into two layers. The outer wall is made of polyolefin, and the inner layer is made of polya

Method used

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  • Low-VOC (Volatile Organic Compounds) low-smell automobile double-wall heat shrink tube and preparation method thereof
  • Low-VOC (Volatile Organic Compounds) low-smell automobile double-wall heat shrink tube and preparation method thereof
  • Low-VOC (Volatile Organic Compounds) low-smell automobile double-wall heat shrink tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] The preparation method of the low-VOC and low-odor automobile double-wall heat-shrinkable tube comprises the following steps:

[0042] Step 1: Preparation of Exterior Wall Masterbatch:

[0043] Each material is weighed by weight, but half of the deodorant masterbatch is weighed, and the resin, pellets and powder are put into the high-speed mixer in turn and stirred evenly;

[0044] The mixed materials are melted and extruded in a parallel twin-screw extruder with a vacuum port, drawn, cooled, and pelletized. The temperature is set to 90-170 ° C, and the temperature of the first and second stages of the extruder is set to a low temperature. At the boiling point of the liquid stripping agent, the vacuum degree is -0.03~-0.1MPa;

[0045] Stir the prepared granules and the other half of the deodorant masterbatch in a high-speed mixer evenly;

[0046]The uniformly mixed material is melted and extruded for the second time in a parallel twin-screw extruder with a vacuum port...

Example

[0052] Preparation Example 1:

[0053] The components are weighed according to the weights listed in the table below.

[0054]

[0055] Weigh each material by weight (half of the deodorant masterbatch is weighed), put resin, pellets and powder into the high-speed mixer in turn and stir evenly;

[0056] The mixed material is melted and extruded in a parallel twin-screw extruder with a vacuum port, drawn, cooled, and pelletized. The temperature of the first and second stages of the extruder is set to 90 °C, and the vacuum degree is -0.05MPa ;

[0057] Stir the granulated material and the other half of the deodorant masterbatch evenly in a high-speed mixer; the uniformly mixed material is extruded, granulated and dried for the second time, and the temperature of the first and second stages of the extruder is set to 90 ℃, the degree of vacuum is -0.05MPa.

[0058] The outer wall masterbatch and the inner wall hot-melt adhesive are co-extruded, and the pipe material is cross-...

Example

[0066] Preparation Example 2

[0067] The components are weighed according to the weights listed in the table below.

[0068]

[0069]

[0070] Weigh each material by weight (weigh half of the masterbatch for deodorization), put resin in turn in a high-speed mixer, and stir the pellets and powder evenly;

[0071] The mixed material is melted and extruded in a parallel twin-screw extruder with a vacuum port, drawn, cooled, and pelletized. The temperature of the first and second stages of the extruder is set to 90 °C, and the vacuum degree is -0.05MPa ;

[0072] Stir the granulated material and the other half of the deodorant masterbatch evenly in a high-speed mixer; the uniformly mixed material is extruded, granulated and dried for the second time, and the temperature of the first and second stages of the extruder is set to 90 ℃, the degree of vacuum is -0.05MPa.

[0073] The outer wall masterbatch and the inner wall hot-melt adhesive are co-extruded, and the pipe mate...

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Abstract

The invention discloses a low-VOC (Volatile Organic Compounds) low-smell automobile double-wall heat shrink tube. An inner wall material of the tube is modified dimer acid polyamide hot melt glue; the ring-and-ball softening point of the tube is 105-130 DEG C; the viscosity of the tube is 7000-14000MPa.S/200 DEG C; an outer wall material of the tube consists of the following components in parts by weight: 100 parts of vinyl resin, 10-40 parts of a thermoplastic elastomer, 40-120 parts of a flame retardant, 2-5 parts of a compatilizer, 0-6 parts of color master batch, 2-5 parts of a lubricant, 1-4 parts of an antioxidant and 5-30 parts of deodorization master batch; the vinyl resin is a commixture of two or more than two of the following substances: low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, an ethylene-ethyl acrylate copolymer, and an ethylene-vinyl acetate copolymer; the thermoplastic elastomer is a mixture of one or two of the following substances: an ethylene-octylene copolymer and an ethylene propylene terpolymer. In a use environment, the low-VOC low-smell automobile double-wall heat shrink tube disclosed by the invention releases a slight amount of organic gases and smell, and requirements of main engine plants on double-wall heat shrink tubes can be met.

Description

technical field [0001] The invention relates to a low-VOC (volatile organic compounds, volatile organic compounds, volatile organic compounds) low-odor double-wall heat-shrinkable tube for sealing, joints and bifurcated joints of automobile wiring harnesses and a preparation method thereof, belonging to the field of sealing and protection of automobile cables. Background technique [0002] As the public pays more attention to health and environmental issues, people pay more and more attention to the indoor air quality of automobiles. The pollution sources of indoor air in automobiles mainly come from the volatile components of various plastic products, such as toluene, xylene and aldehydes and ketones. People who inhale excessive amounts of such substances have the hazards of poisoning, carcinogenicity and teratogenicity. [0003] Each OEM has issued relevant test standards and requirements for VOC (volatile organic compounds, volatile organic compounds) and odor levels in t...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/17H01B7/28H01B7/282H01B7/295H01R4/72C08L23/06C08L23/08C08K13/02C08K5/03C08K3/22C08K5/5313C08K5/3492C08K3/26C08K3/34
CPCH01B7/0216C08K2201/011C08L23/06C08L23/0869C08L2203/18C08L2203/20C08L2205/025C08L2205/035C08L2207/04C08L2207/062C08L2207/066C08L2312/06H01B7/0275H01B7/17H01B7/28H01B7/2825H01B7/295H01R4/72C08L23/0815C08K13/02C08K5/03C08K3/2279C08K2003/2227C08L23/0853C08K5/5313C08K5/34928C08K3/26C08K3/346
Inventor 程炎波刘军曾志安鲁雪莲鲁尔军
Owner CHANGYUAN ELECTRONICS DONGGUAN
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