CN111925734A - Method for bonding helmet shell and helmet edge sealing ring - Google Patents
Method for bonding helmet shell and helmet edge sealing ring Download PDFInfo
- Publication number
- CN111925734A CN111925734A CN202010818209.4A CN202010818209A CN111925734A CN 111925734 A CN111925734 A CN 111925734A CN 202010818209 A CN202010818209 A CN 202010818209A CN 111925734 A CN111925734 A CN 111925734A
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- China
- Prior art keywords
- helmet
- adhesive
- sealing ring
- edge sealing
- shell
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J125/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Adhesives based on derivatives of such polymers
- C09J125/02—Homopolymers or copolymers of hydrocarbons
- C09J125/04—Homopolymers or copolymers of styrene
- C09J125/06—Polystyrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention relates to a method for bonding a helmet shell and a helmet edge sealing ring, which comprises the following steps: step S1: preparing a composite adhesive, namely mixing an epoxy vinyl ester resin adhesive, a polystyrene adhesive and a cis-butadiene adhesive according to a certain proportion, blending in a reaction kettle, and preparing the composite adhesive through an adhesive blending process; step S2: polishing the helmet shell, namely polishing the helmet edge from the lower edge of the helmet shell to the position 2cm away from the lower edge roughly; step S3: and coating and pressing, namely uniformly coating the composite adhesive on the position where the helmet shell is polished roughly and the inner groove of the helmet edge sealing ring, pressing the helmet shell and the helmet edge sealing ring together, and naturally drying for two hours. The three adhesives are compounded to prepare a new adhesive, and the helmet edge sealing ring can be effectively bonded on the aramid fiber woven fabric of the helmet shell by using the compound adhesive. The helmet edge sealing ring is prevented from being separated from the helmet shell, and the attractiveness and the overall protection performance of the helmet body are improved.
Description
Technical Field
The invention relates to the technical field of bulletproof helmets, in particular to a method for bonding a helmet shell and a helmet edge sealing ring.
Background
The bulletproof helmet is mainly used for preventing fragments and bullets from penetrating and can effectively protect the head of a human body. The bulletproof helmet consists of a helmet body, a suspension buffer system and a helmet cover, wherein the helmet body is formed by hot pressing a specially designed gum dipping aramid woven fabric in a die through multiple processes, a helmet edge sealing ring is adhered to the helmet edge, and a protective coating is sprayed on the surface of the helmet edge.
At present, two types of seal rings are mainly arranged along the helmet, one type of seal ring is formed by compression molding by taking vulcanized styrene butadiene rubber (butadiene styrene rubber is general synthetic rubber synthesized by taking butadiene and polystyrene as monomers) as a main raw material, and the other type of seal ring is formed by injection molding by taking unvulcanized modified styrene butadiene rubber as a main raw material.
The above prior art solutions have the following drawbacks: the former has better elasticity and is easy to be bonded, but has heavy mass and high cost, and increases the weight and cost burden of the helmet; the latter has poor elasticity, and is not easy to bond due to the plasticizer mixed in the components, but has light weight and low cost, and can effectively reduce the weight of the helmet and the cost. However, the unvulcanized modified styrene-butadiene rubber is not easy to bond, and the helmet edge sealing ring is easy to separate from the helmet shell under the stimulation of external force, so that the beauty and the integral protection performance of the helmet body are affected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the method for bonding the helmet shell and the helmet edge sealing ring, which can increase the bonding strength between the helmet shell and the helmet edge sealing ring by adopting the composite adhesive, and has the effects of preventing the helmet edge sealing ring from being separated from the helmet shell and improving the appearance of the helmet body and the overall protection performance.
The above object of the present invention is achieved by the following technical solutions:
a method for bonding a helmet shell and a helmet edge sealing ring comprises the following steps:
step S1: preparing a composite adhesive, namely mixing an epoxy vinyl ester resin adhesive, a polystyrene adhesive and a cis-butadiene adhesive according to a certain proportion, blending in a reaction kettle, and preparing the composite adhesive through an adhesive blending process;
step S2: polishing the helmet shell, namely polishing the inner side and the outer side of the helmet edge with the height of 2cm from the lower edge of the helmet shell to be rough;
step S3: and coating and pressing, namely uniformly coating the composite adhesive on the position where the helmet shell is polished roughly and the inner groove of the helmet edge sealing ring, pressing the helmet shell and the helmet edge sealing ring together, and naturally drying for two hours.
Through the technical scheme, the epoxy vinyl resin adhesive has strong adhesion to the porous material, can permeate into the aramid woven fabric of the helmet body, and is effectively adhered to the aramid woven fabric. The polystyrene and the butadiene have the same components as the main components of the helmet edge sealing ring, can be bonded with the helmet edge sealing ring in a cross-linking way, and has strong bonding strength. The epoxy vinyl resin adhesive has the bonding effect by forming a film after solvent water volatilizes, has the characteristics of strong universality, elastic adhesive film, moisture resistance, mildew resistance, aging resistance and the like, has low initial viscosity, good pourability, strong permeability, high consolidation strength and good chemical stability, and is not corroded by acid-base organic solvents and bacteria; the polystyrene adhesive has low viscosity and strong adhesive force, but has poor elasticity and solvent resistance; the butadiene adhesive has high viscosity and high toughness, but has low adhesive force and poor heat resistance. The three adhesives are compounded to prepare a new adhesive, and the helmet edge sealing ring can be effectively bonded on the aramid fiber woven fabric of the helmet shell by using the compound adhesive. And the lower edge of the helmet shell is polished to be rough before gluing, so that the adhesive force of the composite adhesive is further improved, the helmet edge sealing ring is prevented from being separated from the helmet shell, and the attractiveness and the overall protection performance of the helmet body are improved.
The present invention in a preferred example may be further configured to: in step S1, the mixing ratio of the epoxy vinyl ester resin adhesive, the polystyrene adhesive and the butadiene adhesive is 2:3: 2.
Through the technical scheme, the composite adhesive prepared by adopting the mixing proportion has stronger penetrability on the premise of ensuring the high-strength bonding force, so that the service life of the composite adhesive is prolonged. The whole preparation process is simple and convenient, the production period is short, the operation is easy, the industrial production is easy, the cost is low, and the method has good economic benefit and wide application prospect.
The present invention in a preferred example may be further configured to: when the composite adhesive is prepared, the blending temperature of the reaction kettle is set at 25 ℃, and the stirring time is 8-10 min.
Through the technical scheme, the composite adhesive is prepared at normal temperature, so that the activity of each atom in the three adhesives can be kept, and the three adhesives can be quickly compatible with each other. Meanwhile, the epoxy vinyl resin adhesive provides good adhesion for the composite adhesive, and the bonding firmness between the helmet shell and the helmet edge sealing ring is improved. Mixing and stirring for 8-10min to mix the components and ensure the bonding strength of the composite adhesive.
The present invention in a preferred example may be further configured to: the helmet edge sealing ring is formed by injection molding of modified styrene butadiene rubber.
Through the technical scheme, the helmet edge sealing ring which is formed by compression molding by taking the traditional vulcanized styrene butadiene rubber as the main raw material is heavy in weight, and compared with the helmet edge sealing ring which is formed by injection molding by taking the modified styrene butadiene rubber as the main raw material, the helmet edge sealing ring is 8-12 g in weight, so that the load of the helmet is increased, but the helmet edge sealing ring which is formed by injection molding by using the modified styrene butadiene rubber is difficult to bond, poor in elasticity and difficult to process. The novel composite adhesive has the advantages of low initial viscosity, short curing time, easiness in operation and the like, can be simultaneously bonded with aramid woven fabric and helmet edge sealing rings, is firm in bonding strength, and effectively solves the technical problem.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the three adhesives are compounded to prepare a new adhesive, and the helmet edge sealing ring can be effectively bonded on the aramid fiber woven fabric of the helmet shell by using the compound adhesive. And the lower edge of the helmet shell is polished to be rough before gluing, so that the adhesive force of the composite adhesive is further improved, the helmet edge sealing ring is prevented from being separated from the helmet shell, and the attractiveness and the overall protection performance of the helmet body are improved.
2. The composite adhesive is prepared at normal temperature, so that the activity of each atom in the three adhesives can be maintained, and the three adhesives can be quickly compatible with each other. Meanwhile, the epoxy vinyl resin adhesive provides good adhesion for the composite adhesive, and the bonding firmness between the helmet shell and the helmet edge sealing ring is improved. Mixing and stirring for 8-10min to mix the components and ensure the bonding strength of the composite adhesive.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the method for bonding a helmet shell and a helmet edge sealing ring disclosed by the invention comprises the following steps:
step S1: preparing a composite adhesive, namely mixing an epoxy vinyl ester resin adhesive, a polystyrene adhesive and a cis-butadiene adhesive according to a certain proportion, blending in a reaction kettle, and preparing the composite adhesive through an adhesive blending process;
step S2: polishing the helmet shell, namely polishing the helmet edge from the lower edge of the helmet shell to the position 2cm away from the lower edge roughly;
step S3: and coating and pressing, namely uniformly coating the composite adhesive on the position where the helmet shell is polished roughly and the inner groove of the helmet edge sealing ring, pressing the helmet shell and the helmet edge sealing ring together, and naturally drying for two hours.
Further, in step S1, the mixing ratio of the epoxy vinyl ester resin adhesive, the polystyrene adhesive and the butadiene adhesive is 2:3: 2. The composite adhesive prepared by adopting the mixing proportion has stronger penetrability on the premise of ensuring the high-strength bonding force, thereby prolonging the service life of the composite adhesive.
When the composite adhesive is prepared, the blending temperature of a reaction kettle is set at 25 ℃, and the stirring time is 8-10 min. The composite adhesive is prepared at normal temperature, so that the activity of each atom in the three adhesives can be maintained, and the three adhesives can be quickly compatible with each other. Meanwhile, the epoxy vinyl resin adhesive provides good adhesion for the composite adhesive, and the bonding firmness between the helmet shell and the helmet edge sealing ring is improved. Mixing and stirring for 8-10min to mix the components and ensure the bonding strength of the composite adhesive.
In order to make the specification disclosure more complete, the present invention provides the following experimental data for adhesives.
The original vulcanized styrene butadiene rubber has high elasticity, can be bonded by 502 and 602 glues in the market, is simple to operate, does not have a degumming phenomenon in the test of helmet use, bulletproof performance and dropping performance, and has excellent performance. Meanwhile, the vulcanized styrene-butadiene rubber is heavier in weight, about 30g, and is about 10g heavier than a helmet edge sealing ring made of modified styrene-butadiene rubber, so that the weight burden of the helmet is increased, the manufacturing cost is higher, and the cost is 6 yuan higher than that of the helmet edge sealing ring made of modified styrene-butadiene rubber.
In order to reduce the weight of the helmet under the condition of ensuring that the bulletproof performance is not reduced, unvulcanized styrene-butadiene rubber is adopted, modified styrene-butadiene rubber added with a plasticizer is adopted, the elasticity is reduced, the original glue is used, the bonding strength is poor, the helmet is naturally stored under the condition of no external force interference, the helmet edge sealing ring is separated from the helmet body, and then the composite adhesive prepared by blending epoxy vinyl ester resin glue, polystyrene glue and cis-butadiene adhesive is adopted for bonding.
The design principle is as follows: two kinds of glue are adopted, one is adhered to the helmet body, and the other is adhered to the helmet edge sealing ring.
The experimental scheme is as follows: different composite adhesives are obtained by adopting different types of adhesives and different proportions, and are coated on the groove part of the sealing ring of the helmet edge and the lower edge of the helmet body, the two are bonded together, and after the two are respectively kept stand for 12 hours, 24 hours, 48 hours and 72 hours, applying a balanced force opposite to the bonding direction of the helmet edge sealing ring and the helmet body at the position of the helmet edge sealing ring without glue, marking and recording the bonding position of the initial helmet edge sealing ring and the helmet body, marking and recording the bonding position of the helmet edge sealing ring and the helmet body at the moment after applying the force for 12h and 24h, determining whether the scheme meets the requirements by comparing the position change degrees, finally determining the composite adhesive obtained by mixing the epoxy vinyl ester resin adhesive, the polystyrene adhesive and the cis-butadiene adhesive according to the ratio of 2:3:2, it showed no change in position after 24h, even after 72h of application, so the protocol was confirmed to be the final protocol.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (4)
1. A method for bonding a helmet shell and a helmet edge sealing ring is characterized in that: the method comprises the following steps:
step S1: preparing a composite adhesive, namely mixing an epoxy vinyl ester resin adhesive, a polystyrene adhesive and a cis-butadiene adhesive according to a certain proportion, blending in a reaction kettle, and preparing the composite adhesive through an adhesive blending process;
step S2: polishing the helmet shell, namely polishing the inner side and the outer side of the helmet edge with the height of 2cm from the lower edge of the helmet shell to be rough;
step S3: and coating and pressing, namely uniformly coating the composite adhesive on the position where the helmet shell is polished roughly and the inner groove of the helmet edge sealing ring, pressing the helmet shell and the helmet edge sealing ring together, and naturally drying for two hours.
2. The method of claim 1, wherein the step of bonding the shell to the rim seal comprises: in step S1, the mixing ratio of the epoxy vinyl ester resin adhesive, the polystyrene adhesive and the butadiene adhesive is 2:3: 2.
3. The method of claim 1, wherein the step of bonding the shell to the rim seal comprises: when the composite adhesive is prepared, the blending temperature of the reaction kettle is set at 25 ℃, and the stirring time is 8-10 min.
4. The method of claim 1, wherein the step of bonding the shell to the rim seal comprises: the helmet edge sealing ring is formed by injection molding of modified styrene butadiene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010818209.4A CN111925734A (en) | 2020-08-14 | 2020-08-14 | Method for bonding helmet shell and helmet edge sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010818209.4A CN111925734A (en) | 2020-08-14 | 2020-08-14 | Method for bonding helmet shell and helmet edge sealing ring |
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| Publication Number | Publication Date |
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| CN111925734A true CN111925734A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010818209.4A Pending CN111925734A (en) | 2020-08-14 | 2020-08-14 | Method for bonding helmet shell and helmet edge sealing ring |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2066243U (en) * | 1990-05-31 | 1990-11-28 | 泰州市玻璃纤维厂 | Anti-violence helmet for policeman |
| CN1193724A (en) * | 1997-03-18 | 1998-09-23 | 李郁忠 | Bulletproof halmet of composite material |
| CN102559120A (en) * | 2011-12-30 | 2012-07-11 | 浙江天和树脂有限公司 | Temperature-resistant, corrosion-resistant and high-adhesion adhesive and preparation method thereof |
| CN104694063A (en) * | 2015-02-10 | 2015-06-10 | 北京化工大学 | High-performance double-bond-containing epoxy resin/liquid rubber adhesive |
| CN106497457A (en) * | 2015-09-07 | 2017-03-15 | 上海圳拓实业有限公司 | A kind of polystyrene gluing agent and preparation method thereof |
-
2020
- 2020-08-14 CN CN202010818209.4A patent/CN111925734A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2066243U (en) * | 1990-05-31 | 1990-11-28 | 泰州市玻璃纤维厂 | Anti-violence helmet for policeman |
| CN1193724A (en) * | 1997-03-18 | 1998-09-23 | 李郁忠 | Bulletproof halmet of composite material |
| CN102559120A (en) * | 2011-12-30 | 2012-07-11 | 浙江天和树脂有限公司 | Temperature-resistant, corrosion-resistant and high-adhesion adhesive and preparation method thereof |
| CN104694063A (en) * | 2015-02-10 | 2015-06-10 | 北京化工大学 | High-performance double-bond-containing epoxy resin/liquid rubber adhesive |
| CN106497457A (en) * | 2015-09-07 | 2017-03-15 | 上海圳拓实业有限公司 | A kind of polystyrene gluing agent and preparation method thereof |
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Application publication date: 20201113 |
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| RJ01 | Rejection of invention patent application after publication |