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Preparation method of heat-resistant bottle cap sealing material

A sealing material and sealing material technology, which is applied in the polymer field to achieve the effect of improving stability, good thermal conductivity and meeting sealing requirements

Active Publication Date: 2021-12-24
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 sealant:

[0025] The mass proportioning of described 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 and ball milling in absolute ethanol for 1 hour, drying to obtain inorganic silica gel fine powder, the mass ratio of the inorganic silica gel to absolute ethanol is 10:1, the ball milling pressure is 0.9MP, the temperature is 20°C, and the dried The temperature is 100°C; a2, put the inorganic silica gel fine powder into the reactor and l...

Embodiment 2

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

[0037] The mass proportioning of described 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, put the inorganic silica gel into absolute ethanol and ball mill it for 3h, dry to obtain the inorganic silica gel fine powder, and the mass ratio of the inorganic silica gel to the absolute ethanol is 10: 3. The ball milling pressure is 1.3MP, the temperature is 40°C, and the drying temperature is 150°C; a2, put the inorganic silica gel fine powder into the reaction ke...

Embodiment 3

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

[0049] The mass proportioning of described sealing material is as follows:

[0050] 60 parts of isotactic homopolypropylene,

[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, put the inorganic silica gel into absolute ethanol and perform ball milling for 1-3 hours, and dry to obtain fine inorganic silica gel powder. The mass ratio of the inorganic silica gel to absolute ethanol is 10:2, the ball milling pressure is 1.2MP, the temperature is 30°C, and the drying temperature is 130°C; a2, put the inorganic silica gel fine powder into the reaction kett...

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Abstract

The invention belongs to the technical field of macromolecules, and particularly relates to a preparation method of a heat-resistant bottle cap sealing material, polypropylene, polyethylene, ethylene propylene rubber, silica gel, a polyhydroxy compound and a filler are added according to the proportion, and the heat-resistant bottle cap sealing material is obtained after mixing and processing. Polyethylene, polypropylene and ethylene propylene rubber are utilized to form an organic frame structure based on polyethylene and polypropylene, silica gel and filler are matched to form a silica system inorganic frame, a double frame is formed, the current bottle cap quality requirement is met, and 90 DEG C / 15 min pasteurization and 121 DEG C / 30 min high-pressure steam sterilization can be borne.

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 as a sealing gasket . At present, the sealing gaskets of crown caps and plastic caps are mainly made of soft polyvinyl chloride materials and ordinary polyolefin elastomer materials. Soft polyvinyl chloride material is made of polyvinyl chloride resin, plasticizer, stabilizer, lubricant and other substances through high-speed mixer mixing, extruder plastic extrusion, pelletizing and packaging. Ordinary polyolefin elastomer materials are made of various materials such as polyethylene resin, thermoplastic elastomer and soft...

Claims

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Application Information

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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
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