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A kind of preparation method of heat-resistant bottle cap sealing material

A technology of sealing materials and sealing materials, which is applied in the field of polymers to achieve the effects of improving performance, improving mechanical strength, and extending shelf life

Active Publication Date: 2022-07-22
连云港市鼎尚包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a preparation method of heat-resistant bottle cap sealing material, which solves the defects and blanks of existing bottle cap sealing materials, and utilizes polyethylene, polypropylene and ethylene-propylene rubber to form polyethylene The organic framework structure based on polypropylene, combined with silica gel and fillers to form a silicon-oxygen system inorganic framework, forms a double framework, meets the current quality requirements for bottle caps, and can withstand pasteurization at 90°C / 15min and high pressure at 121°C / 30min steam sterilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of heat-resistant bottle cap sealing material:

[0025] The mass ratio of the sealing material is as follows:

[0026]30 parts of random copolymerized polypropylene,

[0027] 20 parts of linear low density polyethylene, and the molecular weight of polyethylene is between 10000-50000,

[0028] 20 parts of EPDM rubber,

[0029] 10 parts of silica gel, the silica gel adopts organic-inorganic composite silica gel, and the mass ratio of organic silicon and inorganic silica gel in the silica gel is 5:1. The preparation method of the organic-inorganic silica gel is as follows: a1, put the inorganic silica gel into the In anhydrous ethanol and ball milling for 1 hour, drying to obtain inorganic silica fine powder, the mass ratio of the inorganic silica gel and absolute ethanol is 10:1, the ball milling pressure is 0.9MP, the temperature is 20 ° C, the drying The temperature is 100°C; a2, put the inorganic silica gel fine powder into the reaction kettle a...

Embodiment 2

[0036] A preparation method of heat-resistant bottle cap sealing material:

[0037] The mass ratio of the sealing material is as follows:

[0038] 100 parts of random copolymerized polypropylene,

[0039] 70 parts of linear low density polyethylene, and the molecular weight of polyethylene is between 10000-50000,

[0040] 50 parts of EPDM rubber,

[0041] 30 parts of silica gel, the silica gel adopts organic-inorganic composite silica gel, and the mass ratio of organic silicon and inorganic silica gel in the silica gel is 5:3. The preparation method of the organic-inorganic silica gel is as follows: a1, the inorganic silica gel is put into dehydrated alcohol and ball-milled for 3h, and dried to obtain the inorganic silica gel fine powder, and the mass ratio of the inorganic silica gel to the dehydrated ethanol is 10: 3. The ball milling pressure is 1.3MP, the temperature is 40°C, and the drying temperature is 150°C; a2, the inorganic silica gel fine powder is put into the r...

Embodiment 3

[0048] A preparation method of heat-resistant bottle cap sealing material:

[0049] The mass ratio of the sealing material is as follows:

[0050] Isotactic homopolypropylene 60 parts,

[0051] 50 parts of linear low density polyethylene, and the molecular weight of polyethylene is between 10000-50000,

[0052] 40 parts of EPDM rubber,

[0053] 20 parts of silica gel, the silica gel adopts organic-inorganic composite silica gel, and the mass ratio of organic silicon and inorganic silica gel in the silica gel is 5:2. The preparation method of the organic-inorganic silica gel is as follows: a1, the inorganic silica gel is put into anhydrous ethanol and ball-milled for 1-3 hours, and dried to obtain the inorganic silica gel fine powder. The mass ratio of the inorganic silica gel to the dehydrated ethanol is: 10:2, the ball milling pressure is 1.2MP, the temperature is 30°C, and the drying temperature is 130°C; a2, the inorganic silica gel fine powder is put into the reaction k...

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Abstract

The invention belongs to the technical field of polymers, and in particular relates to a preparation method of a heat-resistant bottle cap sealing material. Polypropylene, polyethylene, ethylene-propylene rubber, silica gel, polyhydroxy compounds and fillers are added in proportion, and mixed and processed to obtain a heat-resistant bottle cap sealing material. Thermal cap sealing material. The invention utilizes polyethylene, polypropylene and ethylene-propylene rubber to form an organic frame structure based on polyethylene and polypropylene, and cooperates with silica gel and fillers to form a silicon-oxygen system inorganic frame, forming a double frame, which meets the current quality requirements of bottle caps and can withstand Pasteurization at 90°C / 15min and high pressure steam sterilization at 121°C / 30min.

Description

technical field [0001] The invention belongs to the technical field of polymers, and in particular relates to a preparation method of a heat-resistant bottle cap sealing material. Background technique [0002] At present, on glass bottles and plastic bottles used as beer bottles and beverage bottles, crown caps made of tinplate or injection-molded plastic caps are generally used as sealing caps, and a layer of soft and elastic sealing material is provided in the sealing area as a sealing gasket. . At present, the gaskets of crown cover and plastic cover are mainly made of soft polyvinyl chloride material and common polyolefin elastomer material. Soft polyvinyl chloride material is made of polyvinyl chloride resin, plasticizer, stabilizer, lubricant and other substances through high-speed mixer mixing, extruder plasticizing extrusion, dicing and packaging and other processes. Ordinary polyolefin elastomer material is made of polyethylene resin, thermoplastic elastomer and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/08C08L23/16C08L1/28C08K3/36C08K7/24C08K9/10C08K3/22
CPCC08L23/14C08L23/12C08K2003/2227C08L23/0815C08L23/16C08L1/284C08K3/36C08K7/24C08K9/10C08K3/22
Inventor 张启越姚江东杨海龙
Owner 连云港市鼎尚包装有限公司