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Preparation method, product and application of hot-melt self-adhesive adhesive in the production of self-adhesive bandages

A self-adhesive and hot-melt technology, applied in the direction of adhesives, adhesive types, heat-activated films/sheets, etc., can solve the problems of high emulsion prices, unfriendly environment, skin allergies, etc., and save equipment investment and production space , The preparation process is simple, the effect of low skin irritation

Active Publication Date: 2021-10-22
杭州高斯博医疗用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main systems of self-adhesive used for self-adhesive bandages on the market. One is the traditional natural latex as self-adhesive, which is characterized by convenient sources, good self-absorption of products, good air permeability, and skin contact. Comfortable, moderate cost, etc., but the disadvantage is that natural latex contains protein, which will cause skin allergies to some people, and due to the existence of protein, the products usually have peculiar smell, moldy and deteriorated during the storage period, and the quality of the products is unstable
The second is to use synthetic rubber as self-adhesive. Since the softening point of the directly obtained synthetic rubber is generally high, it is not suitable for direct coating. The use of synthetic rubber self-adhesive usually adopts solvent coating and emulsion coating. The method of coating is to directly dissolve the synthetic glue in the solvent for use, which has the characteristics of convenient use, rapid drying, high production efficiency, low processing cost, and good comprehensive performance of the product, but the disadvantage is that a large amount of organic solvents are needed in the production process , not friendly to the environment, poor operating environment, and there are potential safety hazards, relatively high costs and other disadvantages, especially environmental protection issues, has become a bottleneck that inhibits the survival of enterprises; emulsion coating is to convert solvent-based synthetic adhesives into water emulsions. It is characterized by safe operation process, environmental protection, low skin allergy to the bandage, and good comprehensive performance of the product, but the price of the emulsion is high, the processing cost of the product is high, and the production efficiency is not high

Method used

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  • Preparation method, product and application of hot-melt self-adhesive adhesive in the production of self-adhesive bandages
  • Preparation method, product and application of hot-melt self-adhesive adhesive in the production of self-adhesive bandages
  • Preparation method, product and application of hot-melt self-adhesive adhesive in the production of self-adhesive bandages

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Firstly, the polyisoprene rubber synthesized from the raw material is sliced, the double-roll mill is preheated, the roll temperature is kept between 55-65°C, the roll speed is controlled at 16-18r / min, and the speed ratio of the front and rear rolls is adjusted to 1. : 1.15~1.18, then add the sliced ​​rubber into the open mill for masticating, thin pass 3 times, after the plasticized rubber is chopped by a shredder, it is sealed and stored for later use.

[0055] Then, add 109.50kg of raw materials methyl methacrylate, 790.00kg of isooctyl acrylate, 100.00kg of dioctyl adipate, and 0.50kg of benzoyl peroxide into the reaction kettle with a reflux condenser, start the stirrer, and heat The temperature of the reaction system is 85-90°C, and the reaction is maintained at this temperature. When the reaction becomes viscous, the heating is stopped (about 3 hours), and the reaction is completed. When the temperature is lowered to below 40°C, the material can be discharged to ...

Embodiment 2

[0060] Firstly, the polyisoprene rubber and styrene-butadiene rubber synthesized by the raw materials are sliced ​​separately, the double-roll mill is preheated, the roller temperature is kept between 50-60°C, and the roller speed is controlled at 16-18r / min. Before and after adjustment The speed ratio of the rollers is 1:1.18~1.20, and then the sliced ​​rubber is added to the open mill for mastication. The polyisoprene rubber is thinly passed 3 times, and the styrene-butadiene rubber is thinly passed 5 times. The plasticized rubber is cut After shredding with a shredder, keep it sealed for future use.

[0061] Then, 99.00 kg of methyl methacrylate, 560.00 kg of isooctyl acrylate, 140.00 kg of dodecyl methacrylate, 200.00 kg of dioctyl phthalate, and 1.00 kg of azobisisobutyronitrile were added to the reflux In the reaction kettle of the condenser, start the agitator, heat the temperature of the reaction system to 90-95°C, and maintain the reaction at this temperature, stop he...

Embodiment 3

[0066] Firstly, the raw materials synthesized polyisoprene rubber, SIS rubber and EPDM rubber were sliced ​​separately, and the double-roll mill was preheated, the roller temperature was kept between 60-70°C, and the roller speed was controlled at 16-18r / min, adjust the speed ratio of the front and rear rollers to 1:1.20~1.25, and then add the sliced ​​rubber into the open mixer for mastication. The polyisoprene rubber and SIS rubber are thinly passed 3 times, and the EPDM rubber is thinly passed. It can be passed 5 times. After the plasticized rubber is chopped by a shredder, it is sealed and stored for later use.

[0067] Then, the raw materials methyl methacrylate 103.00kg, butyl acrylate 559.75kg, dodecyl methacrylate 186.50kg, dioctyl phthalate 100.00kg, dioctyl sebacate 50.00kg, di-t-butyl Add 0.25 kg of base peroxide, 0.50 kg of azobisisobutyronitrile, etc. into the reaction kettle with reflux condenser, start the agitator, heat the temperature of the reaction system t...

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Abstract

The invention discloses a preparation method of a hot-melt self-adhesive adhesive, which comprises the following steps: (1) using a thermoplastic polymer to make a mastic glue; (2) using an acrylate monomer to make a polyacrylate tackifier; (3) The plasticized rubber obtained in step (1), the polyacrylate tackifier obtained in step (2) and other components are mixed in proportion at 80-150° C. to obtain a hot-melt self-adhesive adhesive. The invention also discloses a hot-melt self-adhesive adhesive and its application in making self-adhesive bandages. Utilizing the method of the present invention to prepare self-adhesive adhesive and self-adhesive bandage has the advantages of convenient source of raw materials, simple production process, safe use of hot-melt self-adhesive adhesive, environmental friendliness, low cost, good comprehensive performance of bandage products, and low skin irritation, etc. Many advantages.

Description

technical field [0001] The invention belongs to the technical field of synthetic adhesives, and in particular relates to a preparation method and product of hot-melt self-adhesive and its application in the production of self-adhesive bandages. Background technique [0002] Self-adhesive adhesive, referred to as self-adhesive, is mainly used for the production of self-adhesive bandages. Self-adhesive bandages, also known as self-adhesive elastic bandages or self-adhesive elastic bandages, belong to medical sporting goods and are suitable for sports, training, outdoor sports, field operations, industrial operation protection, military injuries, surgical and orthopedic wound dressings, and limb immobilization. Limb sprains, soft tissue injuries, joint swelling and pain bandaging, orthopedic surgery, etc. Self-adhesive bandages are usually made of cotton yarn, cotton spandex core-spun yarn, medical intermediate self-adhesive and other materials. Among them, the performance of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/35C09J109/00C09J109/06C09J133/08C09J153/02C09J123/16C09J11/04C09J11/06C09J11/08C09J7/21
CPCC08K2003/2296C08K2003/265C08K2201/014C08L2205/02C08L2205/025C08L2205/035C09J11/04C09J11/06C09J11/08C09J109/00C09J7/21C09J7/35C09J2301/122C08L33/08C08K13/02C08K3/36C08K5/13C08K5/47C08K3/22C08L9/06C08K3/26C08L53/02C08L23/16C08K5/18C08K5/11
Inventor 来焱杨震铎何亚荣王杰
Owner 杭州高斯博医疗用品有限公司
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