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Sealing material and application thereof

A sealing and gasket technology, applied in sealing, other chemical processes, closing, etc., can solve the problems of high cost, complex production process, low strength, etc., and achieve the effect of low cost, strong pressure resistance and high strength

Inactive Publication Date: 2012-08-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The production methods of the bottle cap gaskets disclosed in the above two patents all adopt thermal lamination and calendering, and the production process is complicated and the cost is high.
[0006] No. USP08739488 patent discloses that hydrogenated styrene copolymer and conjugated diene, or its functionalized derivatives are used as raw materials to make gaskets, which have good heat resistance and sealing performance. This patent does not use linear low density polyethylene ( LLDPE), so the strength is relatively low

Method used

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  • Sealing material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: (production technology such as attached figure 1 )

[0021] Take by weighing 300 grams of styrene-butadiene-styrene block copolymer (SBS, number average molecular weight is 50000), 116.7 grams of linear low density polyethylene (LLDPE) and 583.3 grams of low density polyethylene (LDPE), mixing , mixed evenly, and then added to the hopper of the injection molding machine for injection molding and extrusion to obtain the finished gasket.

[0022] Apply the finished sealing gasket to the crown bottle cap, and then carry out the instantaneous pressure test of the crown bottle cap with the sealing gasket: take 10 crown bottle caps with the sealing gasket, press them on the one-way bottle cap with a sealing machine Valve and pressure gauge pressure-resistant device on the bottle mouth, the bottle mouth should meet the GBlosog regulations; after checking the seal is qualified, put it into the water tank, fill the bottle with carbon dioxide, start from 300kPa, st...

Embodiment 2

[0026] Take by weighing 1400 grams of styrene-butadiene-styrene block copolymer (SBS, number average molecular weight is 300000), 500 grams of linear low density polyethylene (LLDPE), 100 grams of low density polyethylene (LDPE), mixing , mixed evenly, and then added to the hopper of the injection molding machine for injection molding and extrusion to obtain the finished gasket.

[0027] Apply the finished sealing gasket to the crown bottle cap, and then carry out the instantaneous pressure test of the crown bottle cap with the sealing gasket: take 10 crown bottle caps with the sealing gasket, press them on the one-way bottle cap with a sealing machine Valve and pressure gauge pressure-resistant device on the bottle mouth, the bottle mouth should meet the GBlosog regulations; after checking the seal is qualified, put it into the water tank, fill the bottle with carbon dioxide, start from 300kPa, stop for 1min every time the pressure increases by 100kPa, and observe whether ther...

Embodiment 3

[0031] Take by weighing 1400 grams of styrene-butadiene-styrene block copolymer (SBS, number average molecular weight is 200000), 1300 grams of linear low density polyethylene (LLDPE), 100 grams of low density polyethylene (LDPE), mixing , mixed evenly, and then added to the hopper of the injection molding machine for injection molding and extrusion to obtain the finished gasket.

[0032] Apply the finished sealing gasket to the crown bottle cap, and then carry out the instantaneous pressure test of the crown bottle cap with the sealing gasket: take 10 crown bottle caps with the sealing gasket, press them on the one-way bottle cap with a sealing machine Valve and pressure gauge pressure-resistant device on the bottle mouth, the bottle mouth should meet the GBlosog regulations; after checking the seal is qualified, put it into the water tank, fill the bottle with carbon dioxide, start from 300kPa, stop for 1min every time the pressure increases by 100kPa, and observe whether the...

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Abstract

The invention discloses sealing material and carbonated beverage bottle cap sealing gasket produced from the same. The sealing material comprises the following components by weight percent: 30-70 percent of styrene-butadiene-styrene block copolymer and 30-70 percent of the polyolefin resin, wherein the polyolefin resin is prepared by mixing low-density polyethylene and linear low-density polyethylene which are at the mass ratio of 5-13:1. The sealing material is poisonless and tasteless, has good sealing performance, good resilience and good adhesiveness. The carbonated beverage bottle cap sealing gasket is produced with the high-productivity injecting and molding process, has excellent sealing performance, low cost and no peculiar smell, can meet the corresponding food safety requirementand is particularly suitable for the rapid and massive flow-line production. The production process of the invention involves no adhering process and no adhesive, thereby causing no chemical pollution and meeting the environmental protection requirement.

Description

technical field [0001] The invention belongs to the technical field of bottle cap sealing gasket production, in particular to a sealing material and its application. Background technique [0002] In daily life, carbonated drinks are loved by everyone, especially by the "young people" and children. The annual output of carbonated beverages is large, with an output of 6.6 million tons in 2003. A large part of this will be packed in reusable glass bottles to protect the environment and reduce costs, so the glass bottles for beverages need to be sealed. In this regard, people often use metal bottle caps to add gaskets for sealing. Since beverages are directly drinkable or edible, this requires the gasket to be non-toxic, tasteless and have excellent sealing performance. [0003] No. 92241875.6 patent discloses "two kinds of wine and beverage bottle cap gaskets. One is a high-foam double-sided double-layer film gasket, with low-density polyethylene high-foam as the base materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/10B65D53/00
Inventor 游革新姚文迪王宏王婧
Owner SOUTH CHINA UNIV OF TECH
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