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A kind of polymer coated natural latex tube and preparation method thereof

A technology of polymer coating and natural latex, which is applied in the field of polymer coating natural latex tubes and its preparation, can solve the problems of strong irritation of the human respiratory tract, highly toxic chlorine gas, and volatile hydrochloric acid, etc., and achieve surface and inner wall treatment processes Safety and environmental protection, smooth surface touch, good anti-sticking effect

Active Publication Date: 2021-02-02
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: hydrochloric acid is volatile and strongly stimulates the human respiratory tract; hydrochloric acid and bleaching water have a corrosive effect on equipment; chlorine gas is highly toxic and endangers human health

Method used

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  • A kind of polymer coated natural latex tube and preparation method thereof
  • A kind of polymer coated natural latex tube and preparation method thereof
  • A kind of polymer coated natural latex tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of preparation method of polymer coated natural latex tube, comprises the following steps:

[0046] Step 1: Prepare water-based polyurethane coating solution: mix the materials according to the following parts by weight, mechanically stir, the stirring speed is 90rpm, and the stirring time is 1.5h, then filter with a stainless steel screen with a pore size of 0.28mm and remove the foam for use:

[0047]

[0048]

[0049] Step 2: Immerse in water-based polyurethane coating liquid: the latex tube is pulled to the automatic dipping machine for natural latex tubes, and its surface is impregnated with water-based polyurethane coating liquid. During dipping, keep at 35°C, dipping time is 5s, drying and curing temperature is 120°C, and the time is 130s.

[0050] Step 3: Demoulding, leaching and pre-drying: Cut the latex tube at the joint of the silicone mold core and send it to a special demoulding tank. One end of the latex tube is driven by high-pressure tap water...

Embodiment 2

[0055] A kind of preparation method of polymer coated natural latex tube, comprises the following steps:

[0056] Step 1: Prepare water-based polyurethane coating solution: mix the materials according to the following weight parts, mechanically stir, stirring speed 80rpm, stirring time 2h, then filter with a stainless steel screen with a pore size of 0.28mm and remove foam for use:

[0057]

[0058] Step 2: Immerse the water-based polyurethane coating liquid: the latex tube is pulled to the automatic dipping machine for natural latex tubes, and its surface is impregnated with the water-based polyurethane coating liquid. During dipping, keep at 40°C, the dipping time is 3s, the drying and curing temperature is 130°C, and the time is 120s.

[0059] Step 3: Demoulding, leaching and pre-drying: Cut the latex tube at the joint of the silicone mold core and send it to a special demoulding tank. One end of the latex tube is driven by high-pressure tap water, and the other end is m...

Embodiment 3

[0064] A kind of preparation method of polymer coated natural latex tube, comprises the following steps:

[0065] Step 1: Prepare water-based polyurethane coating liquid: mix the materials according to the following weight parts, mechanically stir, stirring speed 100rpm, stirring time 1h, then filter with a stainless steel screen with a pore size of 0.28mm and remove foam for use:

[0066]

[0067] Step 2: Immerse the water-based polyurethane coating liquid: the latex tube is pulled to the automatic dipping machine for natural latex tubes, and its surface is impregnated with the water-based polyurethane coating liquid. During dipping, keep at 30°C, the dipping time is 8s, the drying and curing temperature is 120°C, and the time is 160s.

[0068] Step 3: Demoulding, leaching and pre-drying: Cut the latex tube at the joint of the silicone mold core and send it to a special demoulding tank. One end of the latex tube is driven by high-pressure tap water, and the other end is ma...

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Abstract

The invention discloses a high polymer coating natural emulsion tube and a preparation method thereof, and belongs to the technical field of natural emulsion tubes. The high polymer coating natural emulsion tube comprises a natural emulsion tube body, an emulsion tube surface coating and an inner wall coating. The emulsion tube surface coating is a waterborne polyurethane coating. The inner wall coating of the emulsion tube is an acrylic resin coating. The natural emulsion tube automatic impregnating machine is combined, the impregnating process is applied, operability is high, and industrialproduction is achieved; the surface and inner wall treatment process is safe and environment-friendly, and no sewage is discharged; and the surface and the inner wall of the obtained high polymer coating natural emulsion tube can avoid sticking, the surface is smooth when touched, the natural color of the emulsion tube is not influenced by the coatings, and the requirement that during pulling operation and use of manual demolding, stretching is achieved by 250%-300%, the surface coating does not fall off is met.

Description

technical field [0001] The invention relates to the technical field of natural latex tubes, in particular to a polymer-coated natural latex tube and a preparation method thereof. Background technique [0002] Natural latex tubes are used for medical assistance, connection of experimental instruments and assembly of fitness equipment, etc. It is necessary to carry out anti-adhesive treatment on the surface and inner wall to make the surface feel smooth. [0003] At present, the anti-sticking of the surface and inner wall of the natural latex tube adopts the chlorination treatment process, that is, the outer surface and inner wall of the dried natural latex tube are soaked in the mixed aqueous solution of industrial hydrochloric acid, bleaching water and tap water, and the chlorine gas produced by the chemical reaction It reacts with the outer surface and inner wall of the latex tube to form an anti-stick and smooth chlorinated rubber layer. The disadvantages of this process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L11/04F16S3/00C09D175/04C09D7/63C08J7/04C08J7/043C08L7/00C09D133/04B29C41/14B29C41/52B29C41/46B29C41/42B29C37/00B29C71/00
CPCB29C37/00B29C37/0092B29C41/14B29C41/42B29C41/46B29C41/52B29C71/0009B29C2037/90B29C2071/0045B29L2023/005C08J2307/00C08J2433/04C08J2475/04C09D175/04C09D7/63F16L11/04F16S3/00C08K5/54
Inventor 李志锋
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI