阅读说明：本技术 一种食品级抗菌玻璃钢容器及其制备方法 (Food-grade antibacterial glass fiber reinforced plastic container and preparation method thereof ) 是由 沈和春 柯贤在 柯孙苗 郭永刚 庄荣东 时路宽 朱志彬 于 2021-02-08 设计创作，主要内容包括：本发明涉及玻璃钢技术领域,提供一种食品级抗菌玻璃钢容器及其制备方法,包括筒体和筒体两端的封头,所述筒体由内到外依次包括筒内衬层、筒体结构层和筒体外保护层,所述筒体内衬层包括筒体内衬里层、筒体内衬中间层和筒体内衬外层,所述筒体内衬里层由内衬树脂和玻璃纤维表面毡复合而成的,所述内衬树脂由食品级不饱和聚酯树脂、促进剂、固化剂、负氧离子粉、填料、助剂搅拌混合制得,所述筒体内衬中间层由内衬树脂和喷射纱复合而成,所述筒体内衬外层由无碱玻璃纤维布、内衬树脂和喷射纱复合而成,所述筒体结构层为浸润结构树脂的无碱玻璃纤维布缠绕在筒体内衬层外表面形成的。其解决了现有玻璃钢容器不具备抗菌性的问题。(The invention relates to the technical field of glass fiber reinforced plastic, and provides a food-grade antibacterial glass fiber reinforced plastic container and a preparation method thereof, which comprises a cylinder body and end sockets at two ends of the cylinder body, the barrel body sequentially comprises a barrel inner lining layer, a barrel body structure layer and a barrel body outer protection layer from inside to outside, the barrel inner lining layer comprises a barrel body inner lining layer, a barrel body inner lining middle layer and a barrel body inner lining outer layer, the lining layer in the cylinder body is compounded by lining resin and glass fiber surface felt, the lining resin is prepared by stirring and mixing food-grade unsaturated polyester resin, an accelerant, a curing agent, negative oxygen ion powder, a filler and an auxiliary agent, the middle layer of the cylinder liner is compounded by liner resin and jet yarn, the outer layer of the cylinder liner is compounded by alkali-free glass fiber cloth, the liner resin and the jet yarn, the cylinder structure layer is formed by winding alkali-free glass fiber cloth soaked with structural resin on the outer surface of the cylinder liner layer. Which solves the problem that the prior glass fiber reinforced plastic container has no antibacterial property.)

1. A food-grade antibacterial glass fiber reinforced plastic container is characterized in that: the end socket comprises a barrel body and end sockets, the barrel body sequentially comprises a barrel body inner liner layer, a barrel body structure layer and a barrel body outer protective layer from inside to outside, the end socket sequentially comprises an end socket inner liner layer, an end socket structure layer and an end socket outer protective layer from inside to outside, the barrel body structure layer and the end socket structure layer are of an integrated structure, the barrel body inner liner layer comprises a barrel body inner liner layer, a barrel body inner liner intermediate layer and a barrel body inner liner outer layer, the barrel body inner liner layer is formed by compounding inner liner resin and glass fiber surface felt, the inner liner resin is prepared by stirring and mixing food-grade unsaturated polyester resin, an accelerant, a curing agent, negative oxygen ion powder, a filler and an auxiliary agent, the barrel body inner liner intermediate layer is formed by compounding inner liner resin and jet yarns, the barrel body inner liner outer layer is formed, Liner resin and injection yarn are compound to form, the head inner liner includes that head inner liner layer, head inside liner intermediate level and head inside liner are outer, the head inner liner layer is formed by lining resin and the compound of glass fiber surface felt, head inside liner intermediate level is formed by lining resin and injection yarn complex, the head inside liner is outer to be formed by no alkali glass fiber cloth, lining resin and injection yarn complex, the barrel structure layer is formed on barrel inner liner surface for the no alkali glass fiber cloth winding of infiltration structure resin, the head structure layer is formed on head inner liner surface for the no alkali glass fiber cloth winding of infiltration structure resin, barrel outer protective layer and head outer protective layer are the gel coat resin layer.

2. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the jet yarn is chopped glass fiber roving.

3. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the mass ratio of the food-grade unsaturated polyester resin to the accelerator to the curing agent to the negative oxygen ion powder to the filler to the auxiliary agent is 70-90:0.2-0.3:2-4:0.8-2:15-25: 0.08-0.2.

4. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the food-grade unsaturated polyester resin is m-benzene type unsaturated polyester resin, and the viscosity is 350-600mpa & s.

5. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the structural resin is prepared from o-benzene type unsaturated polyester resin, an accelerator, a curing agent, a filler and an auxiliary agent according to a mass ratio of 70-90:0.2-0.3:2-4:15-25: 0.08-0.2.

6. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the curing agent is methyl ethyl ketone peroxide, and the accelerator is cobalt naphthenate or cobalt isooctanoate.

7. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the filler is white carbon black, and the auxiliary agent is one or a mixture of an antistatic agent and a leveling agent in any ratio.

8. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the gel coat resin layer is prepared from gel coat resin, a gel coat resin curing agent, an ultraviolet-resistant absorbent and a toughening agent.

9. The food grade antimicrobial glass fiber reinforced plastic container of claim 8, wherein: the mass ratio of the gel coat resin to the gel coat resin curing agent to the anti-ultraviolet absorbent to the toughening agent is 100:3-5:0.5-2: 0.4-1.2.

10. A food grade antimicrobial glass fiber reinforced plastic container as in claim 1, wherein: the thickness of the cylinder inner liner is 3-5mm, the thickness of the end socket inner liner is 3-5mm, the thickness of the cylinder structural layer and the end socket structural layer is 1-3mm, and the thickness of the cylinder outer protective layer and the end socket outer protective layer is 0.3-0.5 mm.

Technical Field

The invention relates to the technical field of glass fiber reinforced plastics, in particular to a food-grade antibacterial glass fiber reinforced plastic container and a preparation method thereof.

Background

Glass fiber reinforced plastic is a composite material with resin as a matrix and fiber as a reinforcing material, and containers produced by using the glass fiber reinforced plastic have the advantages of light weight, high specific strength, strong designability, good corrosion resistance, convenience in installation and maintenance and the like, so that more and more glass fiber reinforced plastic containers are widely applied to the fields of chemical industry, environmental protection, food, pharmacy and the like in recent years.

Chinese patent application No.: 201410156761.6 discloses a glass fiber reinforced plastic storage tank for storing mixed media, which comprises an inner liner layer, a reinforcing layer and an outer protective layer, wherein the inner surface of the inner liner layer is sequentially provided with an interface layer and an anti-swelling layer. The interface layer is made of epoxy resin curing liquid and reinforcing fibers, and the epoxy resin curing liquid is formed by mixing epoxy resin, an epoxy resin diluent and an epoxy resin curing agent. The anti-swelling layer is made of phenolic resin daub and reinforcing fibers, and the phenolic resin daub is formed by mixing phenolic resin, a diluent and quartz powder. The reinforcing fiber is 400g/m²The alkali-free glass fiber checkered cloth. The glass fiber reinforced plastic storage tank is provided with the interface layer and the anti-swelling layer in the inner lining layer, so that the swelling damage of the inner lining layer caused by a mixed medium containing an organic solvent in strong acid can be prevented, the inner lining layer cannot fall off or leak, the safety is high, the glass fiber reinforced plastic storage tank is not influenced by the content of the organic solvent and the use temperature, the use range is greatly enlarged, and the service life can reach more than 10 years.

At present people constantly promote food hygiene's attention degree, and traditional glass steel container does not possess antibacterial function, if when depositing the container as drinking water storage, food brewing, ultrapure water, produces the bacterium easily at the in-process of depositing, needs secondary disinfection processing side to drink, otherwise probably endangers healthy.

Disclosure of Invention

Therefore, in view of the above, the present invention provides a food grade antibacterial glass fiber reinforced plastic container and a preparation method thereof, which solve the problem that the existing glass fiber reinforced plastic container has no antibacterial property.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides a food level antibiotic glass steel container, includes the head at barrel and barrel both ends, the barrel is by interior shell liner, barrel structure layer and the outer protective layer of barrel of including in proper order outside to, the head is by interior shell liner, head structure layer and the outer protective layer of head of including in proper order outside to, barrel structure layer and head structure layer structure as an organic whole, barrel outer protective layer and head outer protective layer structure as an organic whole, the barrel inner liner includes barrel inner liner layer, barrel inside liner intermediate level and barrel inside liner skin, barrel inner liner layer is formed by lining resin and glass fiber surface felt complex, the lining resin is mixed by the stirring of food level unsaturated polyester resin, promoter, curing agent, negative oxygen ion powder, filler, auxiliary agent and is made, barrel inside liner intermediate level is formed by lining resin and jet yarn complex, barrel inside liner skin is by alkali-free glass fiber cloth, Liner resin and injection yarn are compound to form, the head inner liner includes that head inner liner layer, head inside liner intermediate level and head inside liner are outer, the head inner liner layer is formed by lining resin and the compound of glass fiber surface felt, head inside liner intermediate level is formed by lining resin and injection yarn complex, the head inside liner is outer to be formed by no alkali glass fiber cloth, lining resin and injection yarn complex, the barrel structure layer is formed on barrel inner liner surface for the no alkali glass fiber cloth winding of infiltration structure resin, the head structure layer is formed on head inner liner surface for the no alkali glass fiber cloth winding of infiltration structure resin, barrel outer protective layer and head outer protective layer are the gel coat resin layer.

The further improvement is that: the jet yarn is chopped glass fiber roving.

The further improvement is that: the mass ratio of the food-grade unsaturated polyester resin to the accelerator to the curing agent to the negative oxygen ion powder to the filler to the auxiliary agent is 70-90:0.2-0.3:2-4:0.8-2:15-25: 0.08-0.2.

The further improvement is that: the food-grade unsaturated polyester resin is m-benzene type unsaturated polyester resin, and the viscosity is 350-600mpa & s.

The further improvement is that: the structural resin is prepared from o-benzene type unsaturated polyester resin, an accelerator, a curing agent, a filler and an auxiliary agent according to a mass ratio of 70-90:0.2-0.3:2-4:15-25: 0.08-0.2.

The further improvement is that: the curing agent is methyl ethyl ketone peroxide, and the accelerator is cobalt naphthenate or cobalt isooctanoate.

The further improvement is that: the filler is white carbon black, and the auxiliary agent is one or a mixture of an antistatic agent and a leveling agent in any ratio.

The further improvement is that: the gel coat resin layer is prepared from gel coat resin, a gel coat resin curing agent, an ultraviolet-resistant absorbent and a toughening agent.

The further improvement is that: the mass ratio of the gel coat resin to the gel coat resin curing agent to the anti-ultraviolet absorbent to the toughening agent is 100:3-5:0.5-2: 0.4-1.2.

The further improvement is that: the thickness of the cylinder inner liner is 3-5mm, the thickness of the end socket inner liner is 3-5mm, the thickness of the cylinder structural layer and the end socket structural layer is 1-3mm, and the thickness of the cylinder outer protective layer and the end socket outer protective layer is 0.3-0.5 mm.

The further improvement is that: the content of structural resin in the cylinder structural layer and the end socket structural layer is 32-38%.

The further improvement is that: the winding mode of the cylinder structure layer and the end socket structure layer is alternatively performed by hoop winding and cross winding.

The invention also provides a preparation method of the food-grade antibacterial glass fiber reinforced plastic container, which comprises the following steps:

s1, preparing a cylinder body lining layer:

adding the filler, the negative oxygen ion powder, the coupling agent and the auxiliary agent into unsaturated polyester resin, stirring and mixing for 40-60min, adding the accelerator and the curing agent, continuously stirring and mixing for 10-20min, and then treating by ultrasonic waves to obtain lining resin;

uniformly coating a release agent on a cylinder mould, then spraying a layer of lining resin, then paving a glass fiber surface felt, and rolling by using a compression roller to remove bubbles to form a lining layer in the cylinder;

spraying lining resin and spraying yarns outside the lining layer of the cylinder body, and rolling by using a compression roller to remove bubbles to form a middle layer of the lining of the cylinder body;

winding a layer of alkali-free glass fiber cloth outside the middle layer of the cylinder liner, synchronously spraying lining resin and spraying yarns, and rolling by using a compression roller to remove bubbles to form an outer layer of the cylinder liner;

curing, demolding and finishing to obtain a cylinder inner liner;

s2, preparing an end socket inner liner:

preparing the end socket inner liner layer by the same method as the S1;

s3, assembling the inner lining layer of the cylinder body and the inner lining layer of the end socket:

butting the cylinder inner liner with the end socket inner liner by using an assembling ring, injecting lining resin into a gap at the butt joint, and coating the butt joint by using a glass fiber surface felt and the lining resin to obtain a semi-finished product of the glass fiber reinforced plastic container;

s4, preparation of a structural layer:

polishing and finishing the assembled semi-finished product of the glass fiber reinforced plastic container, and then winding alkali-free glass fiber cloth soaked with structural resin on the surface of the semi-finished product of the glass fiber reinforced plastic container to form a structural layer, wherein the outer surface of the inner liner of the cylinder body is a cylinder body structural layer, the outer surface of the inner liner of the end socket is an end socket structural layer, and the cylinder body structural layer and the end socket structural layer are of an integral structure;

s4, preparing an outer protective layer:

spraying gel coat resin on the outer surface of the structural layer to form an outer protective layer, wherein the outer surface of the cylinder structural layer is a cylinder outer protective layer, the outer surface of the end socket structural layer is an end socket outer protective layer, and the cylinder outer protective layer and the end socket outer protective layer are of an integral structure;

and (5) performing hydrostatic pressure test, and obtaining the food-grade antibacterial glass fiber reinforced plastic container after the test is qualified.

The further improvement is that: the ultrasonic output power is 800-.

By adopting the technical scheme, the invention has the beneficial effects that:

the inner liner layer is an important layer structure of the glass fiber reinforced plastic container, plays roles of corrosion resistance and leakage resistance, comprises an inner liner layer, an inner liner middle layer and an inner liner outer layer, and not only is the corrosion resistance and the leakage resistance of the equipment greatly improved, but also the mechanical strength is enhanced under the combined action of the structures. The lining resin is a key component for forming each layer structure of the lining layer, the raw material selection and the proportion of the lining resin are adjusted and optimized, and the high-activity negative oxygen ion powder is introduced, so that the added value of the negative oxygen ion powder is improved, and meanwhile, the glass fiber reinforced plastic container is endowed with good antibacterial property on the basis of having conventional advantages, and the application range of the glass fiber reinforced plastic container is widened. In addition, negative oxygen ions released by the negative oxygen ion powder can also play roles in purifying air, protecting health and the like, and the glass fiber reinforced plastic container prepared by the invention is particularly suitable for being used as a container for drinking water storage, food brewing and ultrapure water storage. The addition of the coupling agent can improve the adhesive property between the unsaturated polyester resin and the jet yarn and between the unsaturated polyester resin and the glass fiber fabric, so that the mechanical strength and the seepage resistance of the lining layer are improved; the addition of the white carbon black can play a role in reinforcement, and the mechanical properties of the inner liner such as tensile strength, toughness and the like are improved.

The barrel (or end enclosure) structure layer formed by winding the alkali-free glass fiber cloth soaked with the structural resin on the outer surface of the barrel (or end enclosure) lining layer is utilized, so that the overall strength and rigidity of the glass fiber reinforced plastic container are improved. Furthermore, the container can bear compressive stress and tensile stress in all directions by alternately winding in the circumferential direction and the cross direction, and the condition that the container is easy to damage and crack due to local weakness is avoided.

Detailed Description

The following detailed description will be provided for the embodiments of the present invention with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available.

Example one

The utility model provides an antibiotic glass steel container of food level, includes the head at barrel and barrel both ends, the barrel is by interior shell liner, tubular structure layer and the outer protective layer of barrel of including in proper order outside to, the head is by interior shell liner, shell structure layer and the outer protective layer of head of including in proper order outside to, tubular structure layer and shell structure layer structure as an organic whole, the outer protective layer of barrel and shell structure layer structure as an organic whole, the barrel inner liner includes liner layer, barrel inside lining intermediate level and barrel inside lining skin in the barrel, the liner layer is formed by lining resin and glass fiber surface felt complex in the barrel, the lining resin is made by each raw materials of following parts by weight: 70 parts of m-benzene unsaturated polyester resin, 0.2 part of cobalt naphthenate, 2 parts of methyl ethyl ketone peroxide, 0.8 part of negative oxygen ion powder, 15 parts of white carbon black, 0.15 part of silane coupling agent, 0.04 part of antistatic agent and 0.04 part of flatting agent, wherein the middle layer of the cylinder liner is formed by compounding lining resin and jet yarn, the outer layer of the cylinder liner is formed by compounding alkali-free glass fiber cloth, lining resin and jet yarn, the inner layer of the end socket comprises an inner lining layer of the end socket, the middle layer of the end socket liner and an outer layer of the end socket liner, the inner lining layer of the end socket is formed by compounding lining resin and glass fiber surface felt, the middle layer of the end socket liner is formed by compounding lining resin and jet yarn, the outer layer of the end socket liner is formed by compounding alkali-free glass fiber cloth, lining resin and jet yarn, and the cylinder structure layer is formed by winding the alkali-free glass fiber, the end socket structural layer is formed by winding alkali-free glass fiber cloth of soaking structural resin on the outer surface of the end socket lining layer, the content of the structural resin in the cylinder structural layer and the end socket structural layer is 32%, and the structural resin is prepared from the following raw materials in parts by weight: 70 parts of o-benzene unsaturated polyester resin, 0.2 part of cobalt naphthenate, 2 parts of methyl ethyl ketone peroxide, 15 parts of white carbon black, 0.15 part of silane coupling agent, 0.04 part of antistatic agent and 0.04 part of flatting agent, wherein the outer protective layer of the cylinder body and the outer protective layer of the end enclosure are gel coat resin layers which are prepared from the following raw materials in parts by weight: 100 parts of gel coat resin, 3 parts of curing agent (U.S. Shuojin curing agent kp-200), 0.5 part of ultraviolet-resistant absorbent and 0.4 part of polyvinyl butyral.

The m-benzene unsaturated polyester resin is Palatal A400-976A unsaturated polyester resin produced by Jinling Liangsi resin Co. The ortho-benzene unsaturated polyester resin is Palatal P65-901 unsaturated polyester resin produced by Jinling Liangsi resin Co.

The jet yarn is chopped glass fiber roving.

The thickness of barrel inner liner is 3mm, the thickness of head inner liner is 3mm, the thickness of barrel structural layer and head structural layer is 1mm, and the thickness of barrel outer protective layer and head outer protective layer is 0.3 mm.

A preparation method of a food-grade antibacterial glass fiber reinforced plastic container comprises the following steps:

s1, preparing a cylinder body lining layer:

adding white carbon black, negative oxygen ion powder, a silane coupling agent, an antistatic agent and a leveling agent into m-benzene unsaturated polyester resin, stirring and mixing for 40min, adding cobalt naphthenate and methyl ethyl ketone peroxide, continuously stirring and mixing for 10min, then treating for 20min by using ultrasonic waves, and obtaining lining resin with the ultrasonic wave output power of 800W;

uniformly coating a release agent on a cylinder mould, then spraying a layer of lining resin, then paving a glass fiber surface felt, and rolling by using a compression roller to remove bubbles to form a lining layer in the cylinder;

spraying lining resin and spraying yarns outside the lining layer of the cylinder body, and rolling by using a compression roller to remove bubbles to form a middle layer of the lining of the cylinder body;

winding a layer of alkali-free glass fiber cloth outside the middle layer of the cylinder liner, synchronously spraying lining resin and spraying yarns, and rolling by using a compression roller to remove bubbles to form an outer layer of the cylinder liner;

curing, demolding and finishing to obtain a cylinder inner liner;

s2, preparing an end socket inner liner:

preparing the end socket inner liner layer by the same method as the S1;

s3, assembling the inner lining layer of the cylinder body and the inner lining layer of the end socket:

butting the cylinder inner liner with the end socket inner liner by using an assembling ring, injecting lining resin into a gap at the butt joint, and coating the butt joint by using a glass fiber surface felt and the lining resin to obtain a semi-finished product of the glass fiber reinforced plastic container;

s4, preparation of a structural layer:

polishing and finishing the assembled semi-finished product of the glass fiber reinforced plastic container, and then winding alkali-free glass fiber cloth soaked with structural resin on the surface of the semi-finished product of the glass fiber reinforced plastic container to form a structural layer, wherein the outer surface of a cylinder liner layer is a cylinder structural layer, the outer surface of a head liner layer is a head structural layer, the cylinder structural layer and the head structural layer are of an integral structure, and the winding mode adopts annular winding and cross winding alternately;

s4, preparing an outer protective layer:

spraying gel coat resin on the outer surface of the structural layer to form an outer protective layer, wherein the outer surface of the cylinder structural layer is a cylinder outer protective layer, the outer surface of the end socket structural layer is an end socket outer protective layer, and the cylinder outer protective layer and the end socket outer protective layer are of an integral structure;

and (5) performing hydrostatic pressure test, and obtaining the food-grade antibacterial glass fiber reinforced plastic container after the test is qualified.

Example two

The utility model provides an antibiotic glass steel container of food level, includes the head at barrel and barrel both ends, the barrel is by interior shell liner, tubular structure layer and the outer protective layer of barrel of including in proper order outside to, the head is by interior shell liner, shell structure layer and the outer protective layer of head of including in proper order outside to, tubular structure layer and shell structure layer structure as an organic whole, the outer protective layer of barrel and shell structure layer structure as an organic whole, the barrel inner liner includes liner layer, barrel inside lining intermediate level and barrel inside lining skin in the barrel, the liner layer is formed by lining resin and glass fiber surface felt complex in the barrel, the lining resin is made by each raw materials of following parts by weight: 80 parts of m-benzene unsaturated polyester resin, 0.25 part of cobalt iso-octoate, 3 parts of methyl ethyl ketone peroxide, 1.5 parts of negative oxygen ion powder, 20 parts of white carbon black, 0.3 part of silane coupling agent, 0.1 part of antistatic agent and 0.05 part of flatting agent, wherein the middle layer of the cylinder liner is formed by compounding liner resin and jet yarn, the outer layer of the cylinder liner is formed by compounding alkali-free glass fiber cloth, liner resin and jet yarn, the inner liner layer of the end socket comprises an inner liner layer of the end socket, the middle layer of the end socket liner and an outer layer of the end socket liner, the inner liner layer of the end socket is formed by compounding liner resin and glass fiber surface felt, the middle layer of the end socket liner is formed by compounding the liner resin and the jet yarn, the outer layer of the end socket liner is formed by compounding alkali-free glass fiber cloth, the liner resin and the jet yarn, and the cylinder structure layer is formed by, the end socket structural layer is formed by winding alkali-free glass fiber cloth of soaking structural resin on the outer surface of the end socket lining layer, the content of the structural resin in the cylinder structural layer and the end socket structural layer is 35%, and the structural resin is prepared from the following raw materials in parts by weight: 80 parts of o-benzene unsaturated polyester resin, 0.25 part of cobalt iso-octoate, 3 parts of methyl ethyl ketone peroxide, 20 parts of white carbon black, 0.3 part of silane coupling agent, 0.1 part of antistatic agent and 0.05 part of leveling agent, wherein the outer protective layer of the cylinder body and the outer protective layer of the end enclosure are gel coat resin layers which are composed of the following raw materials in parts by weight: 100 parts of gel coat resin, 4 parts of gel coat resin curing agent (Aksu curing agent M-50), 1.2 parts of ultraviolet-resistant absorbent and 0.8 part of polyvinyl butyral.

The m-benzene unsaturated polyester resin is Palatal A400-976A unsaturated polyester resin produced by Jinling Liangsi resin Co. The ortho-benzene unsaturated polyester resin is Palatal P65-901 unsaturated polyester resin produced by Jinling Liangsi resin Co.

The jet yarn is chopped glass fiber roving.

The thickness of barrel inner liner is 4mm, the thickness of head inner liner is 4mm, the thickness of barrel structural layer and head structural layer is 2mm, and the thickness of barrel outer protective layer and head outer protective layer is 0.4 mm.

A preparation method of a food-grade antibacterial glass fiber reinforced plastic container comprises the following steps:

s1, preparing a cylinder body lining layer:

adding white carbon black, negative oxygen ion powder, a silane coupling agent, an antistatic agent and a leveling agent into unsaturated polyester resin, stirring and mixing for 50min, adding cobalt iso-octoate and methyl ethyl ketone peroxide, continuing stirring and mixing for 15min, then treating for 15min by using ultrasonic waves, and obtaining lining resin by using the ultrasonic waves with the output power of 900W;

uniformly coating a release agent on a cylinder mould, then spraying a layer of lining resin, then paving a layer of glass fiber surface felt, and rolling by using a compression roller to remove bubbles to form a lining layer in the cylinder;

synchronously spraying lining resin and spraying yarns outside the lining layer of the cylinder body, and rolling by using a press roller to remove bubbles to form a lining middle layer of the cylinder body;

winding a layer of alkali-free glass fiber cloth outside the middle layer of the cylinder liner, synchronously spraying lining resin and spraying yarns, and rolling by using a compression roller to remove bubbles to form an outer layer of the cylinder liner;

curing, demolding and finishing to obtain a cylinder inner liner;

s2, preparing an end socket inner liner:

preparing the end socket inner liner layer by the same method as the S1;

s3, assembling the inner lining layer of the cylinder body and the inner lining layer of the end socket:

butting the cylinder inner liner with the end socket inner liner by using an assembling ring, injecting lining resin into a gap at the butt joint, and coating the butt joint by using a glass fiber surface felt and the lining resin to obtain a semi-finished product of the glass fiber reinforced plastic container;

s4, preparation of a structural layer:

polishing and finishing the assembled semi-finished product of the glass fiber reinforced plastic container, and then winding alkali-free glass fiber cloth soaked with structural resin on the surface of the semi-finished product of the glass fiber reinforced plastic container to form a structural layer, wherein the outer surface of a cylinder liner layer is a cylinder structural layer, the outer surface of a head liner layer is a head structural layer, the cylinder structural layer and the head structural layer are of an integral structure, and the winding mode adopts annular winding and cross winding alternately;

s4, preparing an outer protective layer:

spraying gel coat resin on the outer surface of the structural layer to form an outer protective layer, wherein the outer surface of the cylinder structural layer is a cylinder outer protective layer, the outer surface of the end socket structural layer is an end socket outer protective layer, and the cylinder outer protective layer and the end socket outer protective layer are of an integral structure;

and (5) performing hydrostatic pressure test, and obtaining the food-grade antibacterial glass fiber reinforced plastic container after the test is qualified.

EXAMPLE III

The utility model provides an antibiotic glass steel container of food level, includes the head at barrel and barrel both ends, the barrel is by interior shell liner, tubular structure layer and the outer protective layer of barrel of including in proper order outside to, the head is by interior shell liner, shell structure layer and the outer protective layer of head of including in proper order outside to, tubular structure layer and shell structure layer structure as an organic whole, the outer protective layer of barrel and shell structure layer structure as an organic whole, the barrel inner liner includes liner layer, barrel inside lining intermediate level and barrel inside lining skin in the barrel, the liner layer is formed by lining resin and glass fiber surface felt complex in the barrel, the lining resin is made by each raw materials of following parts by weight: 90 parts of m-benzene unsaturated polyester resin, 0.3 part of cobalt naphthenate, 4 parts of methyl ethyl ketone peroxide, 2 parts of negative oxygen ion powder, 25 parts of white carbon black, 0.5 part of silane coupling agent, 0.06 part of antistatic agent and 0.14 part of flatting agent, wherein the barrel lining middle layer is formed by compounding lining resin and jet yarn, the barrel lining outer layer is formed by compounding alkali-free glass fiber cloth, lining resin and jet yarn, the head lining layer comprises a head lining layer, a head lining middle layer and a head lining outer layer, the head lining layer is formed by compounding lining resin and glass fiber surface felt, the head lining middle layer is formed by compounding lining resin and jet yarn, the head lining outer layer is formed by compounding alkali-free glass fiber cloth, lining resin and jet yarn, the barrel structure layer is formed by winding the alkali-free glass fiber cloth of soaking structure resin on the barrel lining outer surface, the end socket structural layer is formed by winding alkali-free glass fiber cloth of soaking structural resin on the outer surface of the end socket lining layer, the content of the structural resin in the cylinder structural layer and the end socket structural layer is 38%, and the structural resin is prepared from the following raw materials in parts by weight: 90 parts of o-benzene unsaturated polyester resin, 0.3 part of cobalt naphthenate, 4 parts of methyl ethyl ketone peroxide, 25 parts of white carbon black, 0.5 part of silane coupling agent, 0.06 part of antistatic agent and 0.14 part of flatting agent, wherein the outer protective layer of the cylinder body and the outer protective layer of the end enclosure are gel coat resin layers which are prepared from the following raw materials in parts by weight: 100 parts of gel coat resin, 5 parts of gel coat resin curing agent (Acksu curing agent V388), 2 parts of ultraviolet-resistant absorbent and 1.2 parts of polyvinyl butyral.

The m-benzene unsaturated polyester resin is Palatal A400-976A unsaturated polyester resin produced by Jinling Liangsi resin Co. The ortho-benzene unsaturated polyester resin is Palatal P65-901 unsaturated polyester resin produced by Jinling Liangsi resin Co.

The jet yarn is chopped glass fiber roving.

The thickness of barrel inner liner is 5mm, the thickness of head inner liner is 5mm, the thickness of barrel structural layer and head structural layer is 3mm, and the thickness of barrel outer protective layer and head outer protective layer is 0.5 mm.

A preparation method of a food-grade antibacterial glass fiber reinforced plastic container comprises the following steps:

s1, preparing a cylinder body lining layer:

adding a filler, negative oxygen ion powder, a coupling agent and an auxiliary agent into unsaturated polyester resin, stirring and mixing for 60min, adding cobalt naphthenate and methyl ethyl ketone peroxide, continuing stirring and mixing for 20min, then treating for 10min by using ultrasonic waves, and obtaining lining resin by using the ultrasonic wave output power of 1000W;

uniformly coating a release agent on a cylinder mould, then spraying a layer of lining resin, then paving a glass fiber surface felt, and rolling by using a compression roller to remove bubbles to form a lining layer in the cylinder;

spraying lining resin and spraying yarns outside the lining layer of the cylinder body, and rolling by using a compression roller to remove bubbles to form a middle layer of the lining of the cylinder body;

winding a layer of alkali-free glass fiber cloth outside the middle layer of the cylinder liner, synchronously spraying lining resin and spraying yarns, and rolling by using a compression roller to remove bubbles to form an outer layer of the cylinder liner;

curing, demolding and finishing to obtain a cylinder inner liner;

s2, preparing an end socket inner liner:

preparing the end socket inner liner layer by the same method as the S1;

s3, assembling the inner lining layer of the cylinder body and the inner lining layer of the end socket:

butting the cylinder inner liner with the end socket inner liner by using an assembling ring, injecting lining resin into a gap at the butt joint, and coating the butt joint by using a glass fiber surface felt and the lining resin to obtain a semi-finished product of the glass fiber reinforced plastic container;

s4, preparation of a structural layer:

polishing and finishing the assembled semi-finished product of the glass fiber reinforced plastic container, and then winding alkali-free glass fiber cloth soaked with structural resin on the surface of the semi-finished product of the glass fiber reinforced plastic container to form a structural layer, wherein the outer surface of a cylinder liner layer is a cylinder structural layer, the outer surface of a head liner layer is a head structural layer, the cylinder structural layer and the head structural layer are of an integral structure, and the winding mode adopts annular winding and cross winding alternately;

s4, preparing an outer protective layer:

spraying gel coat resin on the outer surface of the structural layer to form an outer protective layer, wherein the outer surface of the cylinder structural layer is a cylinder outer protective layer, the outer surface of the end socket structural layer is an end socket outer protective layer, and the cylinder outer protective layer and the end socket outer protective layer are of an integral structure;

and (5) performing hydrostatic pressure test, and obtaining the food-grade antibacterial glass fiber reinforced plastic container after the test is qualified.

The antibacterial performance of the food-grade antibacterial glass fiber reinforced plastic containers prepared in the embodiments is detected according to GB/T21866-2008, and the test results are shown in Table 1. The food grade antibacterial glass fiber reinforced plastic containers prepared in the embodiments are tested according to JC/T587-2012, and the test results are shown in Table 2.

TABLE 1

As can be seen from Table 1, the food-grade antibacterial glass fiber reinforced plastic container prepared by the invention has good antibacterial performance.

TABLE 2

Remarking: the inner diameter of the vessel was 2000mm and the length was 4900 mm.

The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.