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Method for preparing thermoplastic elastomer rubber tube of ethylene-propylene rubber/polypropylene

A thermoplastic elastic, ethylene propylene rubber technology, applied in the direction of tubular articles, applications, household appliances, etc., can solve the problems of difficult loading, low elasticity of PVC hoses, etc., to achieve good oil resistance and solve the effect of loading difficulties.

Active Publication Date: 2006-10-11
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low elasticity and difficult loading of the existing PVC rubber hose, and propose to use EPDM / PP material and use a plastic extruder to extrude, without vulcanization, and to produce EPDM+PP by one extrusion molding process hose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] To produce an EPDM+PP hose with an inner diameter of 12±0.5mm×15±0.5mm×1000±3mm, the steps are as follows:

[0012] 1. Dry

[0013] Dry the EPDM / PP pellets in an oven at 80°C for 2 hours to fully evaporate the moisture in the rubber compound.

[0014] 2. Extrusion process

[0015] First, select a single-screw plastic extruder with a ratio of length to diameter of 20:1. The temperature control of each stage of the extruder is as follows: the temperature of the head: 170°C, the temperature of the extrusion section: 160°C, and the temperature of the plasticizing section: 150°C, the temperature of the feeding section is: 145°C. And choose a 13mm needle and a 17mm mouth shape to ensure the size of the hose.

[0016] 3. Cooling process

[0017] After the rubber is extruded from the machine head, the temperature is high and it is difficult to form. It must be cooled to form. The temperature of the circulating water is controlled at 15°C, and the shape is cooled.

[0018] ...

Embodiment 2

[0020] To produce an EPDM+PP hose with an inner diameter of 12±0.5mm×15±0.5mm×1000±3mm, the steps are as follows:

[0021] 1. Dry

[0022] Bake EPDM / PP pellets in an oven at 50°C for 4 hours to fully evaporate the moisture in the rubber compound.

[0023] 2. Extrusion process

[0024] First, select a single-screw plastic extruder with a ratio of length to diameter of 38:1. The temperature control of each stage of the extruder is as follows: the temperature of the head: 220°C, the temperature of the extrusion section: 220°C, and the temperature of the plasticizing section: 210°C, the temperature of the feeding section is: 200°C. And choose a 13mm needle and a 17mm mouth shape to ensure the size of the hose.

[0025] 3. Cooling process

[0026] After the rubber material is extruded from the machine head, the temperature is high and it is difficult to form. It must be cooled to form. The temperature of the circulating water is controlled at 10°C, and the shape is cooled and s...

Embodiment 3

[0028] To produce an EPDM+PP hose with an inner diameter of 12±0.5mm×15±0.5mm×1000±3mm, the steps are as follows:

[0029] 1. Dry

[0030] Dry the EPDM / PP pellets in an oven at 100°C for 1 hour to fully evaporate the moisture in the rubber compound.

[0031] 2. Extrusion process

[0032] First choose a single-screw plastic extruder with a ratio of length to diameter of 30:1. The temperature control of each stage of the extruder is as follows: the temperature of the head: 145°C, the temperature of the extrusion section: 150°C, and the temperature of the plasticizing section: 150°C, the temperature of the feeding section is: 145°C. And choose a 13mm needle and a 17mm mouth shape to ensure the size of the hose.

[0033] 3. Cooling process

[0034] After the rubber is extruded from the machine head, the temperature is high and it is difficult to form. It must be cooled to form. The temperature of the circulating water is controlled at 25°C, and the shape is cooled.

[0035] C...

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Abstract

The invention discloses a method for preparing ethylen-propylene rubber / polypropylene thermoplastic flexible tube, which uses single-screw plastic extruder to mold tube. And said method comprises: (a) drying that drying rubber in 50-100Deg. C for 1-4 hours; (b) extruding: selecting single-screw plastic extruder whose length-diameter rate is 20-38:1; and the temperature at each step of extruder is: head temperature in 145-220Deg. C, extruding section in 145-220Deg. C, plastifying section in 140-210Deg. C, feeding section in 140-200Deg. C; and selecting pin and pourer according to the size of final tube; (c) cooling that when the plastic is extruded from the head, using cycle water to cool and mold it in 140-200Deg. C. the invention can avoid sulfuration, and prepare EPDM+PP tube in one molding process. And it can solve the defects of low flexibility and hard transportation of present PVC tube; and inventive tube has better original, anti-aging and anti-oil properties to meet the demand of vehicle industry.

Description

technical field [0001] The invention relates to the technical field of hoses, in particular to a preparation method of an ethylene-propylene rubber / polypropylene thermoplastic elastomer hose. Background technique [0002] The ethylene-propylene rubber / polypropylene (EPDM / PP) thermoplastic elastomer (TPE) prepared by dynamic vulcanization has excellent weather resistance, ozone resistance, ultraviolet resistance and good high temperature performance, electrical performance and impact resistance. Its oil resistance and solvent resistance are comparable to those of general-purpose neoprene rubber. At the same time, it can be processed without vulcanization. It can be processed with standard thermoplastic processing equipment. It has the advantages of simple processing, continuous production, and low processing cost. Due to the above advantages, it is widely used in the automotive industry and its usage is also increasing. However, as the sunroof ...

Claims

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Application Information

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IPC IPC(8): B29B13/06B29C48/09B29C48/32B29C48/625B29C48/92B29K9/00B29K23/00B29L23/00
CPCB29C48/397B29C48/92B29C2948/92704B29C48/09B29C48/625B29C48/9185B29C2948/92895B29C2948/92904
Inventor 薛俊芳张洪起李风海
Owner TIANJIN PENGYI GRP CO LTD
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