CN101440187A - PVC plastic sealing material and preparation thereof - Google Patents
PVC plastic sealing material and preparation thereof Download PDFInfo
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- CN101440187A CN101440187A CNA2008102188768A CN200810218876A CN101440187A CN 101440187 A CN101440187 A CN 101440187A CN A2008102188768 A CNA2008102188768 A CN A2008102188768A CN 200810218876 A CN200810218876 A CN 200810218876A CN 101440187 A CN101440187 A CN 101440187A
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Abstract
The invention discloses a PVC plastic sealing material, which is prepared from the following compositions by weight portion: 100 portions of PVC resin, 55 to 85 portions of plasticizer, 0.8 to 5 portions of calcium-zinc composite stabilizer, 30 to 70 portions of filler, 0 to 25 portions of thermoplastic elastomer, 0.01 to 0.05 portion of antibacterial agent, 0.5 to 1.5 portions of toner and 0.5 to 2 portions of composite synergist. The invention also discloses a method for preparing the PVC plastic sealing material, which comprises: adding the composite synergist into the filler and packaging the composite synergist in the filler; mixing and heating the PVC resin, the calcium-zinc composite stabilizer and the antibacterial agent in a high-speed kneader, adding the plasticizer and the filler into a mixture under the condition of temperature rise, stirring and heating the mixture, and obtaining a high-temperature mixture; and cooling the high-temperature mixture in a cold mixer, adding the thermoplastic elastomer into the mixture, preparing PVC granular materials when the mixture is cooled to a temperature of between 40 and 45 DEG C, and obtaining the PVC plastic sealing material after extruding. The sealing material not only has low cost but also has good physical and mechanical properties and surface property.
Description
Technical field
The present invention relates to a kind of plastic sealing material and preparation method thereof, especially a kind of plastic sealing material of PVC cheaply and preparation method thereof belongs to the sealing material technical field.
Background technology
Sealing material application at present is more extensive, and the PVC sealing system of prior art mainly comprises materials such as polyvinyl chloride resin powder, softening agent, calcium-zinc composite stabilizer, weighting agent, acrylonitrile-butadiene rubber powder, antiseptic-germicide and toner.Have the sealing material of technology to use the amount of weighting agent less now, the consumption of other auxiliary agents is higher, and the price of weighting agent is relatively cheap, and the price of other auxiliary agents exceeds much relatively, so the sealing material cost of prior art is higher.Under the fierce day by day environment of market competition, how reducing cost but do not reducing that to control product cost effectively under the principle of performance be the emphasis that manufacturer more and more pays close attention to.
Summary of the invention
The object of the present invention is to provide a kind of plastic sealing material of PVC cheaply.
Another object of the present invention provides the preparation method of above-mentioned sealing material.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of PVC plastic sealing material, make by the component of following parts by weight:
100 parts of polyvinyl chloride resins, softening agent 55-85 part, calcium-zinc composite stabilizer 0.8-5 part, weighting agent 30-70 part, thermoplastic elastomer 0-25 part, antiseptic-germicide 0.01-0.05 part, toner 0.5-1.5 part, composite synergist 0.5-2 part.
Described composite synergist is for being to make through chemosynthesis, be to have the organic group grafting of resistance of oxidation on the surface treatment molecule, collection coupler, dispersion agent, intramolecularly external lubricant, antioxidant etc. are combined with each other, the component that comprises following parts by weight: 30～40 parts in phenolic hydroxyl group ether, alcohol ester: 30～40 parts, fatty acid ester: 10～20 parts, 10～20 parts of lubricants.
As preferred version, the parts by weight of each component of PVC plastic sealing material of the present invention are: 100 parts of polyvinyl chloride resins, softening agent 65-80 part, calcium-zinc composite stabilizer 1.5-3.5 part, weighting agent 35-60 part, thermoplastic elastomer 3-15 part, antiseptic-germicide 0.02-0.03 part, toner 0.8-1.2 part, composite synergist 1-1.5 part.
The polymerization degree of described PVC is 1000～1300.
Described weighting agent is a light calcium carbonate; Described thermoplastic elastomer is an acrylonitrile-butadiene rubber powder; Described softening agent is a common plasticizers.
Sealing agent of the present invention is particularly useful for the sealing of refrigerator door, because gasket places between refrigerator body and the door body, and need life-time service under low temperature environment, compare with other PVC section bar, possess certain rubber performance and winter hardiness, add acrylonitrile-butadiene rubber powder, can make an envelope have enough elasticity and use it to obtain good low-temperature performance, and in use, can prevent an envelope plasticizer migration that aging (hardening) takes place; The adding softening agent can increase the toughness of material, improves the plasticity-of door envelope; For making an envelope product possess excellent mechanical intensity, hardness, improve the physicals of PVC plastic cement, select for use light calcium carbonate as weighting agent; Increasing calcium-zinc composite stabilizer in composition can increase the weathering resistance of product, makes door be enclosed in to rise in the course of processing when thermostable effect and user use not easy to change.
The preparation method of PVC sealing plastic material of the present invention may further comprise the steps:
(1) composite synergist is joined in the weighting agent, and it is wrapped in the middle of the weighting agent;
(2) with polyvinyl chloride resin, calcium-zinc composite stabilizer and antiseptic-germicide Hybrid Heating in the high speed kneader, and when being warming up to 60-80 ℃, add softening agent, add weighting agent when being heated to 95 ℃, be heated with stirring to 118 ℃ and obtain hot mixture;
(3) hot mixture is cooled to 50 ℃ in cold mixer and adds thermoplastic elastomers, make the PVC pellet when being cooled to 40-45 ℃, again through extrude the PVC plastic sealing material.
Compared with prior art, the present invention has following beneficial effect:
Added composite synergist in the component of the present invention, can be in the goods course of processing, make the packed height homodisperse, system viscosity reduces, processing fluidity is further improved, especially increased the consumption of former filler, therefore not only reduced production cost, also improved the physical and mechanical properties of goods and improved surface property.
Embodiment
Below further specify technical scheme of the present invention by specific embodiment.
Comparative Examples and embodiment component and parts by weight see Table 1, and the preparation method of Comparative Examples and embodiment PVC plastic sealing material is as follows:
(1) composite synergist is joined in the weighting agent, and it is wrapped in the middle of the weighting agent;
(2) with polyvinyl chloride resin, calcium-zinc composite stabilizer and antiseptic-germicide Hybrid Heating in the high speed kneader, and when being warming up to 70 ℃, add softening agent, add weighting agent when being heated to 95 ℃, be heated with stirring to 118 ℃ and obtain hot mixture;
(3) hot mixture is cooled to 50 ℃ in cold mixer and adds thermoplastic elastomer, make the PVC pellet by dual-screw pelletizer when being cooled to 45 ℃, obtain sealing material by the single screw extrusion machine extrusion moulding again.
The component of each embodiment of table 1 and weight part numerical table
| Comparative Examples 1 | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| The polyvinyl chloride resin powder | 100 | 100 | 100 | 100 |
| Softening agent | 76 | 70 | 75 | 80 |
| Calcium-zinc composite stabilizer | 1.2 | 1.2 | 1.3 | 1.8 |
| Weighting agent | 30 | 40 | 50 | 60 |
| Acrylonitrile-butadiene rubber powder | 6 | 6 | 8 | 10 |
| Antiseptic-germicide | 0.02 | 0.02 | 0.02 | 0.02 |
| Toner | 0.08 | 0.08 | 0.08 | 0.08 |
| Composite synergist | 0 | 0.6 | 1.0 | 1.2 |
Described composite synergist comprises the component of following parts by weight: 30 parts in phenolic hydroxyl group ether, and alcohol ester: 40 parts, fatty acid ester: 10 parts, 20 parts of lubricants.The performance of the PVC plastic sealing material that above Comparative Examples and embodiment are made is tested, and the results are shown in Table 2:
Table 2 PVC plastic sealing material The performance test results
| General requirement | Comparative Examples 1 | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Density (g/cm 3) | 1.1-1.3 | 1.29 | 1.2 | 1.22 | 1.25 |
| Shore hardness HS (A) | 70±4 | 71 | 70 | 69.4 | 69 |
| Tensile strength (Mpa) | ≥10 | 10.5 | 11.5 | 12.2 | 12.31 |
| Elongation at break (%) | ≥250 | 265 | 288 | 300 | 353 |
| Heating quality loss (%) | ≤3 | 0.8 | 0.53 | 0.7 | 0.91 |
From test result as can be seen, the tensile strength of the embodiment 1,2,3 of adding composite synergist, the Comparative Examples 1 that elongation at break does not more add composite synergist increase to some extent, and mechanical property increases.
From above embodiment and Comparative Examples more as can be seen, the present invention has increased the consumption of weighting agent effectively owing to added composite synergist, compare with the sealing material that does not use composite synergist, cost can reduce more than 20%, and composite synergist also makes the packed height homodisperse, system viscosity reduces, processing fluidity is further improved, therefore not only reduced production cost, also improve the physical and mechanical properties of goods and improved surface property, under market environment with keen competition, this technology has goodish economic benefit and application value.
Claims (7)
1. PVC plastic sealing material, make by the component of following parts by weight:
100 parts of polyvinyl chloride resins, softening agent 55-85 part, calcium-zinc composite stabilizer 0.8-5 part, weighting agent 30-70 part, thermoplastic elastomer 0-25 part, antiseptic-germicide 0.01-0.05 part, toner 0.5-1.5 part, composite synergist 0.5-2 part;
Described composite synergist comprises the component of following parts by weight: 30～40 parts in phenolic hydroxyl group ether, and alcohol ester: 30～40 parts, fatty acid ester: 10～20 parts, 10～20 parts of lubricants.
2. sealing material as claimed in claim 1, the parts by weight that it is characterized in that each component are: 100 parts of polyvinyl chloride resins, softening agent 65-80 part, calcium-zinc composite stabilizer 1.5-3.5 part, weighting agent 35-60 part, thermoplastic elastomer 3-15 part, antiseptic-germicide 0.02-0.03, toner 0.8-1.2 part, composite synergist 1-1.5 part.
3. sealing material as claimed in claim 1 or 2, the polymerization degree that it is characterized in that described PVC is 1000～1300.
4. sealing material as claimed in claim 1 or 2 is characterized in that described weighting agent is a light calcium carbonate.
5. sealing material as claimed in claim 1 or 2 is characterized in that described thermoplastic elastomer is an acrylonitrile-butadiene rubber powder.
6. sealing material as claimed in claim 1 or 2 is characterized in that described softening agent is a common plasticizers.
7. the preparation method of the described PVC plastic sealing material of claim 1 is characterized in that may further comprise the steps:
(1) composite synergist is joined in the weighting agent, and it is wrapped in the middle of the weighting agent;
(2) with polyvinyl chloride resin, calcium-zinc composite stabilizer and antiseptic-germicide Hybrid Heating in the high speed kneader, and when being warming up to 60-80 ℃, add softening agent, add weighting agent when being heated to 95 ℃, be heated with stirring to 118 ℃ and obtain hot mixture;
(3) hot mixture is cooled to 50 ℃ in cold mixer and adds thermoplastic elastomers, make the PVC pellet when being cooled to 40-45 ℃, again through extrude the PVC plastic sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102188768A CN101440187A (en) | 2008-11-04 | 2008-11-04 | PVC plastic sealing material and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102188768A CN101440187A (en) | 2008-11-04 | 2008-11-04 | PVC plastic sealing material and preparation thereof |
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| Publication Number | Publication Date |
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| CN101440187A true CN101440187A (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102188768A Pending CN101440187A (en) | 2008-11-04 | 2008-11-04 | PVC plastic sealing material and preparation thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923412A (en) * | 2014-04-04 | 2014-07-16 | 合肥美的电冰箱有限公司 | PVC (Polyvinyl Chloride) sealing strip and application thereof |
| CN104260308A (en) * | 2014-08-29 | 2015-01-07 | 辽宁程威塑料型材有限公司 | Co-extrusion forming method for plastic profile and sealing rubber strip |
| CN104292703A (en) * | 2014-10-30 | 2015-01-21 | 六安索伊电器制造有限公司 | PVC granules for refrigerator door seal and preparation method for PVC granules |
-
2008
- 2008-11-04 CN CNA2008102188768A patent/CN101440187A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923412A (en) * | 2014-04-04 | 2014-07-16 | 合肥美的电冰箱有限公司 | PVC (Polyvinyl Chloride) sealing strip and application thereof |
| CN103923412B (en) * | 2014-04-04 | 2016-05-18 | 合肥美的电冰箱有限公司 | PVC sealing strip and application thereof |
| CN104260308A (en) * | 2014-08-29 | 2015-01-07 | 辽宁程威塑料型材有限公司 | Co-extrusion forming method for plastic profile and sealing rubber strip |
| CN104292703A (en) * | 2014-10-30 | 2015-01-21 | 六安索伊电器制造有限公司 | PVC granules for refrigerator door seal and preparation method for PVC granules |
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Open date: 20090527 |