CN107351415B - Silica gel bonding process - Google Patents
Silica gel bonding process Download PDFInfo
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- CN107351415B CN107351415B CN201710282806.8A CN201710282806A CN107351415B CN 107351415 B CN107351415 B CN 107351415B CN 201710282806 A CN201710282806 A CN 201710282806A CN 107351415 B CN107351415 B CN 107351415B
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- jointed
- silica gel
- joint
- piece
- vulcanization
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a silica gel bonding process, which belongs to the field of silica gel products and comprises the following steps: coating a layer of adhesive on the joint surface of the to-be-jointed piece; then the joint piece to be jointed is put into an oven to be baked, so that the adhesive on the joint surface of the joint piece to be jointed is cured into a film; and (3) attaching the silica gel to the joint surface of the to-be-jointed piece, putting the silica gel and the to-be-jointed piece into a mold simultaneously, and performing vulcanization hot pressing molding to joint the silica gel to the to-be-jointed piece. The silica gel bonding process can firmly bond silica gel and other materials and is not easy to fall off.
Description
Technical Field
The invention relates to the field of silica gel products, in particular to a silica gel bonding process.
Background
Silica gel is a high-activity adsorption material, belongs to an amorphous substance, and has a chemical molecular formula of mSiO 2. nH 2O; except strong alkali and hydrofluoric acid, the paint does not react with any substance, is insoluble in water and any solvent, is nontoxic and tasteless, and has stable chemical properties. Different types of silica gel form different microporous structures due to different manufacturing processes. The chemical components and physical structure of silica gel determine that the silica gel has the characteristics that a plurality of other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical property, higher mechanical strength and the like.
Due to the characteristics of silica gel, silica gel is commonly used for manufacturing kitchen utensils and furniture articles; however, in general, the silicone rubber is combined with other materials (nylon or metal) to manufacture kitchen utensils or furniture, but the silicone rubber and the other materials are not easy to be jointed, so that the kitchen utensils or the furniture are easy to fall off and damage, and the service life is short.
Disclosure of Invention
In order to solve the above problems, the present invention provides a silica gel bonding process, which can firmly bond silica gel and other materials, and is not easy to fall off.
The technical scheme adopted by the invention is as follows: a silica gel bonding process, comprising the steps of:
A. coating a layer of adhesive on the joint surface of the to-be-jointed piece;
B. then the joint piece to be jointed is put into an oven to be baked, so that the adhesive on the joint surface of the joint piece to be jointed is cured into a film;
C. and (3) attaching the silica gel to the joint surface of the to-be-jointed piece, putting the silica gel and the to-be-jointed piece into a mold simultaneously, and performing vulcanization hot pressing molding to joint the silica gel to the to-be-jointed piece.
In the process, before the step A, an ester solvent is coated on the joint surface of the to-be-jointed piece to remove dirt on the to-be-jointed piece, so that the joint effect cannot be influenced by the dirt.
In the process, after the bonding surface of the to-be-bonded piece is coated with the ester solvent, the to-be-bonded piece volatilizes the ester solvent at normal temperature, and the volatilization time is 100-140 minutes; the ester solvent can take away dirt on the surface of the joint to be jointed.
In the above process, the components of the adhesive include mineral spirit, nonvolatile matter, polydimethylsiloxane and silane coupling agent; the solvent oil accounts for 70-90 percent, the nonvolatile matter accounts for 0-10 percent, the polydimethylsiloxane accounts for 5-10 percent, and the silane coupling agent accounts for 5-10 percent; the adhesive has good adhesion effect, long adhesion life, and water and oil resistance.
In the process, in the step B, the baking time of the joint to be jointed in the oven is 15-25 minutes, the baking temperature is 100-140 ℃, and the adhesive on the joint surface of the joint to be jointed can be ensured to be stably filmed without influencing the adhesive effect of the adhesive.
In the process, in the step C, the silica gel is attached to the joint surface of the joint to be jointed and then is parked for 1-3 days, so that the adhesive and the silica gel can fully act.
In the process, in the step C, before the silica gel and the to-be-jointed piece are simultaneously put into a die for vulcanization hot-pressing forming, a release agent is coated on the non-joint surface of the to-be-jointed piece, so that the silica gel is prevented from being adhered to the non-joint surface of the to-be-jointed piece, and the performance and the attractiveness of a product are prevented from being influenced.
In the process, in the step C, the vulcanization temperature of the vulcanization hot-press molding is not more than 200 ℃, the silica gel structure is not damaged, and the vulcanization effect is ensured.
In the process, after the silica gel is jointed on the part to be jointed in the step C, two-stage vulcanization is carried out, so that the mechanical property and the compression permanent deformation property of the silica gel are improved, and the silica gel is not easy to fall off the part to be jointed.
In the process, the initial temperature of the second-stage vulcanization is 5-15 ℃ lower than the vulcanization temperature of vulcanization hot-press molding; the vulcanization temperature of the second-stage vulcanization is gradually increased, and the maximum vulcanization temperature of the second-stage vulcanization is not more than 200 ℃; above-mentioned process makes the second-stage vulcanization effect better, treats that fastener and silica gel bonding effect are better.
The invention has the beneficial effects that: the silica gel bonding process has the following beneficial effects:
1. a layer of adhesive is coated on the joint surface of the to-be-jointed piece and is adhered by the adhesive, so that the joint effect of the silica gel and the to-be-jointed piece is good;
2. the adhesive on the joint surface of the joint piece is solidified into a film, and the adhesive forms a film, so that the joint between the silica gel and the joint piece has higher tension and better adhesion effect;
in a word, the silica gel bonding process can firmly bond silica gel and other materials, particularly nylon and metal, and is not easy to fall off, so that the reliability of the product is improved, and the service life is longer.
Detailed Description
The silica gel bonding process comprises the following steps:
A. coating a layer of adhesive on the joint surface of the to-be-jointed piece, wherein the adhesive needs to be uniformly coated on the joint surface of the to-be-jointed piece, and the thickness of the adhesive is kept consistent as much as possible;
B. then the joint piece to be jointed is put into an oven to be baked, so that the adhesive on the joint surface of the joint piece to be jointed is cured into a film;
C. and (3) attaching the silica gel to the joint surface of the to-be-jointed piece, putting the silica gel and the to-be-jointed piece into a mold simultaneously, and performing vulcanization hot pressing molding to joint the silica gel to the to-be-jointed piece.
Before step a, the bonding surface of the to-be-bonded member is coated with an ester solvent, and if necessary, the to-be-bonded member can be washed with the ester solvent to remove dirt on the to-be-bonded member, so that the bonding effect is not affected by the dirt. The ester solvent can be butyl acetate, ethyl acetate or amyl acetate. After coating an ester solvent on the joint surface of the joint to be jointed, volatilizing the ester solvent at normal temperature for 140 minutes, wherein the volatilization time is 100-140 minutes, and under the general condition, the ester solvent can be volatilized in 120 minutes; the ester solvent can take away dirt on the surface of the joint to be jointed.
The components of the adhesive comprise solvent oil, nonvolatile substances, polydimethylsiloxane and a silane coupling agent; the proportion of solvent oil is 80%, the proportion of nonvolatile matter is 5%, the proportion of polydimethylsiloxane is 7.5%, and the proportion of silane coupling agent is 7.5%; the adhesive has good adhesion effect, long adhesion life, and water and oil resistance.
In the step B, the baking time of the to-be-bonded member in the oven is 15 to 25 minutes, generally 20 minutes, specifically according to the type of the silica gel; the baking temperature is 100-140 ℃, the baking temperature is 120 ℃ in general, and the baking temperature is determined according to the type of silica gel; the process ensures that the adhesive on the joint surface of the to-be-jointed piece can be stably formed into a film without influencing the adhesive effect of the adhesive.
In the step C, the silica gel is attached to the joint surface of the joint to be jointed and then is parked for 1 to 3 days, so that the adhesive and the silica gel can fully act; the silica gel is particularly optimal after being attached to the joint surface of the joint member for 2 days, so that the adhesive can fully act with the silica gel, and the hardening and plasticity reduction of the sizing material of the silica gel can not be caused.
In the step C, before the silica gel and the to-be-joined member are simultaneously put into a mold and subjected to vulcanization hot press molding, a release agent is coated on the non-joint surface of the to-be-joined member; the position coated with the release agent can not be bonded by the silica gel, so that the silica gel is prevented from being bonded to the non-joint surface of the to-be-bonded piece to influence the performance and the attractiveness of the product.
In the step C, the vulcanization temperature of the vulcanization hot-press molding is not more than 200 ℃, the silica gel structure is not damaged, and the vulcanization effect is ensured; the vulcanization temperature of the vulcanization hot-pressing molding is more preferably 120 ℃, and the vulcanization effect is more preferably.
And D, after the silica gel is jointed on the part to be jointed in the step C, performing secondary vulcanization, and improving the mechanical property and the compression permanent deformation property of the silica gel, so that the silica gel is not easy to fall off the part to be jointed.
The initial temperature of the second-stage vulcanization is 5-15 ℃, preferably 10 ℃ lower than the vulcanization temperature of the vulcanization hot-press molding, and the vulcanization process can be continuously deepened under the action of waste heat or the continuous crosslinking phenomenon can be generated under the dynamic action. The vulcanization temperature of the second-stage vulcanization is gradually increased, and the maximum vulcanization temperature of the second-stage vulcanization is not more than 200 ℃; above-mentioned process makes the second-stage vulcanization effect better, treats that fastener and silica gel bonding effect are better.
The above examples are intended to illustrate rather than to limit the invention, and all equivalent changes and modifications made by the processes described in the claims of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The silica gel bonding process is characterized by comprising the following steps
A. Coating a layer of adhesive on the joint surface of the to-be-jointed piece;
B. then the joint piece to be jointed is put into an oven to be baked, so that the adhesive on the joint surface of the joint piece to be jointed is cured into a film;
C. attaching silica gel to the joint surface of the to-be-jointed piece, putting the silica gel and the to-be-jointed piece into a mold simultaneously, and performing vulcanization hot pressing molding to joint the silica gel to the to-be-jointed piece;
after the silica gel is jointed on the part to be jointed in the step C, secondary vulcanization is also carried out, wherein the silica gel is mSiO 2. nH 2O;
the components of the adhesive comprise solvent oil, nonvolatile substances, polydimethylsiloxane and a silane coupling agent; the solvent oil accounts for 70-90 percent, the nonvolatile matter accounts for 0-10 percent, the polydimethylsiloxane accounts for 5-10 percent, and the silane coupling agent accounts for 5-10 percent;
the initial temperature of the second-stage vulcanization is 5-15 ℃ lower than the vulcanization temperature of vulcanization hot-press molding; the vulcanization temperature of the secondary vulcanization is gradually increased, and the maximum vulcanization temperature of the secondary vulcanization is not more than 200 ℃.
2. The silicone bonding process of claim 1, wherein: before step A, coating ester solvent on the joint surface of the joint to be jointed.
3. The silicone bonding process of claim 2, wherein: after the bonding surface of the to-be-bonded piece is coated with the ester solvent, the to-be-bonded piece volatilizes the ester solvent at normal temperature, and the volatilization time is 100-140 minutes.
4. The silicone bonding process of claim 1, wherein: in the step B, the baking time of the joint to be bonded in the oven is 15-25 minutes, and the baking temperature is 100-140 ℃.
5. The silicone bonding process of claim 1, wherein: and C, attaching the silica gel to the joint surface of the joint to be jointed and then standing for 1-3 days.
6. The silicone bonding process according to claim 1 or 5, wherein: in step C, before the silica gel and the joint piece to be jointed are simultaneously put into a mould for vulcanization hot-pressing forming, a release agent is coated on the non-joint surface of the joint piece to be jointed.
7. The silicone bonding process of claim 1, wherein: in step C, the vulcanization temperature of the vulcanization hot-press molding is not more than 200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710282806.8A CN107351415B (en) | 2017-04-26 | 2017-04-26 | Silica gel bonding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710282806.8A CN107351415B (en) | 2017-04-26 | 2017-04-26 | Silica gel bonding process |
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| Publication Number | Publication Date |
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| CN107351415A CN107351415A (en) | 2017-11-17 |
| CN107351415B true CN107351415B (en) | 2021-02-02 |
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| CN201710282806.8A Active CN107351415B (en) | 2017-04-26 | 2017-04-26 | Silica gel bonding process |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108724552A (en) * | 2018-05-04 | 2018-11-02 | 苏州国泰科技发展有限公司 | The bonding process of liquid-state silicon gel and stainless steel adapting piece |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104441631A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method of easily worn silicon rubber ring and metal cementing part |
| CN105500572A (en) * | 2015-11-23 | 2016-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method for vulcanized fluororubber and metal composite parts |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101531881B (en) * | 2008-03-14 | 2012-04-18 | 上海橡胶制品研究所 | Bonding adhesive for bonding fluorocarbon silicone rubber with metals and preparation method thereof |
| CN102221116B (en) * | 2010-04-16 | 2013-03-20 | 上海新艺塑料厂有限公司 | Manufacturing method of fireproof conveying pipe |
| CN102756528B (en) * | 2011-04-25 | 2014-12-31 | 唐干 | Preparation method of metal-fluororubber composite sealing plate |
| CN104103213A (en) * | 2014-06-17 | 2014-10-15 | 东莞洛克橡塑制品有限公司 | Process for manufacturing thermal laminated silica gel trademark by die forming |
| CN106146942A (en) * | 2016-06-28 | 2016-11-23 | 江门市新会区天府密封科技有限公司 | Rubber-plastic foamed composite board of metal and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104441631A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method of easily worn silicon rubber ring and metal cementing part |
| CN105500572A (en) * | 2015-11-23 | 2016-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method for vulcanized fluororubber and metal composite parts |
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| CN107351415A (en) | 2017-11-17 |
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