Sealing rubber strip for vacuum bag used at room temperature to 200 DEG C and preparation method for sealing rubber strip
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A sealing strip and vacuum bag technology, which is applied in the field of vacuum bag sealing strip and its preparation, can solve the problems of sealing strip foaming, low temperature of sealing strip, low viscosity of sealing strip, etc., and achieve good adhesion Performance, high tensile and shear strength, and excellent sealing effect
Active Publication Date: 2015-11-11
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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Problems solved by technology
Solve the problem of low operating temperature of the existing sealant strips, enable long-term sealing at 200°C and provide a pressure of about 1atm; s
Method used
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Embodiment 2
[0075] 100 parts by mass of butyl rubber, 70 parts by mass of precipitated white carbon black (the white carbon black is first processed in an alcohol solution of 1% mass KH560, pulverized, and dried), 90 parts by mass of medium molecular weight aluminum-based polyisobutylene, and tertiary 7 parts by mass of butylphenolic resin, 3 parts by mass of stannous chloride, and 4 parts by mass of calcium oxide.
[0076] Put butyl rubber in a two-roller rubber mixing machine, adjust the roller distance to 1 mm, masticate for 10 minutes, add half of the filler, and mix evenly; Mix the vulcanization system and the other half of the filler, knead evenly; add polyisobutylene, knead evenly, and discharge; stop for 48 hours; heat the extruder to 60-80°C, extrude, and pack.
[0077]The vacuum bag prepared by the sealing strip can provide a pressure close to 1 atm, and the sealing strip will not leak for a long time from room temperature to 200°C; it is bonded with aluminum alloy (the thicknes...
Embodiment 3
[0079] 100 parts by mass of butyl rubber, 20 parts by mass of methylated silica, 50 parts by mass of kaolin, 100 parts by mass of medium molecular weight aluminum-based polyisobutylene, 1 part by mass of n-butyl titanate, 8 parts by mass of p-isooctyl phenolic resin 10 parts by mass of bromobutyl rubber, 3 parts by mass of zinc oxide, and 5 parts by mass of calcium oxide.
[0080] Put butyl rubber in a two-roller rubber mixing machine, adjust the roller distance to 1 mm, masticate for 10 minutes, add half of the filler, and mix evenly; Mix the vulcanization system and the other half of the filler, knead evenly; add polyisobutylene, knead evenly, and discharge; stop for 36 hours; heat the extruder to 60-80°C, extrude, and pack.
[0081] The vacuum bag prepared by the sealing strip can provide a pressure close to 1 atm, and the sealing strip will not leak for a long time from room temperature to 200°C; it is bonded with aluminum alloy (the thickness of the sealing strip is 2mm),...
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Abstract
The invention relates to a sealing rubber strip for a vacuum bag used at room temperature to 200 DEG C and a preparation method for the sealing rubber strip. By taking butyl rubber as a basic rubber material, tackifying resin, filler, a vulcanization system, a water absorbent and a coupling agent are added into the sealing rubber strip. The sealing rubber strip provided by the invention has the advantages that butyl rubber is the lowest in air permeability among all universal rubber and is good in air impermeability. The sealing rubber strip has a good heat-resisting performance, and the using temperature of the butyl rubber vulcanized by phenolic resin is ranged from room temperature to 200 DEG C; the sealing rubber strip is pressure-sensitive and can be sealed by finger pressing; the sealing rubber strip has a good adhesive performance on various sealing films and dies; the sealing rubber strip has relatively high tensile strength; the water absorbent is used to absorb water released from the high-temperature vulcanized phenolic resin, so that air bubbles generated by high-temperature vulcanization of the sealing rubber strip is avoided; the sealing rubber strip used is easy to removed, and the residual sealing rubber strip is not left on the die. The vacuum bag prepared by the sealing rubber strip can provide a pressure close to 1 atm and the sealing rubber strip can be used for sealing without leakage for a long time from room temperature to 200 DEG C; the sealing rubber strip is convenient to use.
Description
technical field [0001] The invention relates to a vacuum bag sealing strip used at room temperature to 200°C and a preparation method thereof, belonging to the field of polymer rubber materials. Background technique [0002] There are mainly two companies producing pressure-sensitive vacuum bag sealing strips abroad, Schinee and AEROVAC. The products have been serialized. For example, the maximum operating temperature of SM9151 is 204°C. The mold is peeled off and can be peeled off and repositioned multiple times, but the recipe and method of preparation are not published. [0003] Domestic research on high temperature and pressure sensitive butyl rubber vacuum bag sealing strips is less. [0004] Chinese patent CN101921551, High-temperature-resistant vacuum bag sealing tape, discloses a preparation method of high-temperature-resistant vacuum bag sealing tape, using butyl rubber, neoprene, polyisobutylene and nano-calcium carbonate as main materials, and then adding high-te...
Claims
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Application Information
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