阅读说明：本技术 一种玻璃钢板材及其制备工艺 (Glass fiber reinforced plastic plate and preparation process thereof ) 是由 不公告发明人 于 2018-06-26 设计创作，主要内容包括：本发明公开了一种玻璃钢板材及其制备工艺,属于玻璃钢板材生产技术领域,该玻璃钢板材包括无异味的胶衣层、基层,胶衣层与基层连接,基层包括玻璃纤维层和用于浸润玻璃纤维层的浸润层。本发明中的玻璃钢板材具有无异味且对人体无害、强度大、还可应用于食品领域的优点。(The invention discloses a glass fiber reinforced plastic plate and a preparation process thereof, belonging to the technical field of glass fiber reinforced plastic plate production. The glass fiber reinforced plastic plate has the advantages of no peculiar smell, no harm to human bodies, high strength and capability of being applied to the field of food.)

1. The glass fiber reinforced plastic plate is characterized by comprising a gel coat layer (1) without peculiar smell and a base layer (2), wherein the gel coat layer (1) is connected with the base layer (2), and the base layer (2) comprises a glass fiber layer and a soaking layer for soaking the glass fiber layer.

2. The glass fiber reinforced plastic plate as claimed in claim 1, wherein the gel coat layer (1) comprises the following components in parts by weight:

100 parts of unsaturated polyester resin;

0.5-1.0 part of curing agent CHP;

1.3-2.25 parts of an initiator;

the initiator in the gel coat layer (1) comprises at least one of initiator BPO, peroxide and cobalt accelerator.

3. The glass fiber reinforced plastic plate as claimed in claim 2, wherein the initiator of the gel coat layer (1) comprises 0.2-0.6 parts by weight of initiator BPO, 1.0-1.5 parts by weight of peroxide, and 0.1-0.15 parts by weight of cobalt accelerator; the peroxide comprises at least three of 35-45% of methyl ethyl ketone peroxide, 20-45% of dimethyl phthalate, 10-20% of diethylene glycol, 3-7% of methyl ethyl ketone and 1-5% of hydrogen peroxide by mass percentage.

4. The glass fiber reinforced plastic plate as claimed in claim 3, wherein the wetting layer comprises the following components in parts by weight:

100 parts of unsaturated polyester resin;

0.5-1.0 part of curing agent CHP;

1.3-2.25 parts of an initiator;

1-2 parts of vinyl monomer multipolymer;

the initiator in the wetting layer comprises at least one of initiator BPO, peroxide and cobalt accelerator.

5. The glass fiber reinforced plastic plate of claim 4, wherein the initiator in the wetting layer comprises 0.2-0.6 parts by weight of initiator BPO, 1.0-1.5 parts by weight of peroxide and 0.1-0.15 parts by weight of cobalt accelerator; the peroxide comprises at least three of 35-45% of methyl ethyl ketone peroxide, 20-45% of dimethyl phthalate, 10-20% of diethylene glycol, 3-7% of methyl ethyl ketone and 1-5% of hydrogen peroxide by mass percentage.

6. The glass fiber reinforced plastic plate as claimed in claim 1, wherein the thickness of the gel coat layer (1) is 0.2-0.6mm, and the thickness of the base layer (2) is 0.5-4.0 mm.

7. The glass fiber reinforced plastic sheet according to claim 1, wherein the unsaturated polyester resin comprises 28 to 34wt% of styrene.

8. The glass fiber reinforced plastic plate as claimed in claim 3 or 5, wherein the peroxide comprises 35-45% by weight of methyl ethyl ketone peroxide, 20-45% by weight of dimethyl phthalate, 10-20% by weight of diethylene glycol, 3-7% by weight of methyl ethyl ketone, and 1-5% by weight of hydrogen peroxide.

9. The glass fiber reinforced plastic sheet according to claim 1, wherein the glass fiber has a density of 2.4 to 2.7g/cm³。

10. The process for the preparation of a glass fiber reinforced plastic panel according to any one of claims 1 to 7, comprising the steps of:

step one, fully mixing unsaturated polyester resin, an accelerator BPO and a cobalt accelerator in a gel coat layer (1) according to parts by weight, adding peroxide, and fully mixing; adding a curing agent CHP, and fully mixing to form a first resin mixture;

step two, on the basis of the PET film, uniformly coating the first resin mixture obtained in the step one on the surface of the PET film through a feeding pump and a scraper, continuously baking the PET film and the first resin mixture coated on the PET film for 2.5-3min at the temperature of 80-130 ℃, and curing to form a gel coat layer (1);

step three, fully mixing the unsaturated polyester resin, the accelerator BPO, the cobalt accelerator and the defoaming agent in the wetting layer according to the parts by weight, adding peroxide, and fully mixing; adding a curing agent CHP, and fully mixing to form a second resin mixture;

step four, the second resin mixture obtained in the step three is spread on the surface of the gel coat layer (1) formed in the step two to form a wetting layer, the glass fibers are uniformly placed in the liquid wetting layer, and the glass fibers are fully wetted to form a base layer (2);

step five, uniformly covering a layer of PET film on the surface of the base layer (2) formed in the step four, continuously baking for 5-5.5min at the temperature of 80-130 ℃, curing to form a glass fiber reinforced plastic plate, and tearing off the PET film.

Technical Field

The invention relates to the technical field of glass fiber reinforced plastic plate production, in particular to a glass fiber reinforced plastic plate and a preparation process thereof.

Background

The traditional glass fiber reinforced plastic plate is manufactured by adopting unsaturated polyester resin. The unsaturated polyester resin contains more styrene, and the styrene can not completely generate crosslinking reaction with the unsaturated polyester resin in the process of manufacturing the glass fiber reinforced plastic plate, so that the styrene is remained in the formed glass fiber reinforced plastic plate, the smell of the glass fiber reinforced plastic plate is too big, the human health is not facilitated, the strength of the glass fiber reinforced plastic plate is not high enough, and the application of the glass fiber reinforced plastic plate in the field of food is also limited.

Therefore, the glass fiber reinforced plastic plate has low smell, no harm to human body, high strength and high commercial value, and may be used in food industry.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a glass fiber reinforced plastic plate which has the advantages of no peculiar smell, no harm to human bodies, high strength and capability of being applied to the field of food.

In order to achieve the first purpose, the invention provides the following technical scheme:

the glass fiber reinforced plastic plate comprises a gel coat layer without peculiar smell and a base layer, wherein the gel coat layer is connected with the base layer, and the base layer comprises a glass fiber layer and a soaking layer for soaking the glass fiber layer.

Through the technical scheme, the glass fiber layer is soaked in the soaking layer, so that the mechanical strength of the formed base layer is increased. And the gel coat layer is connected with the base layer, so that the overall mechanical property of the formed glass fiber reinforced plastic plate is improved. In addition, the gel coat layer and the base layer have no peculiar smell and are harmless to human bodies, and can be used in the field of foods.

More preferably: the gel coat layer comprises the following components in parts by weight:

100 parts of unsaturated polyester resin;

0.5-1.0 part of curing agent CHP;

1.3-2.25 parts of an initiator;

the initiator in the gel coat layer comprises at least one of initiator BPO, peroxide and cobalt accelerator.

Through the technical scheme, the unsaturated polyester resin contains a certain amount of styrene, and a crosslinking reaction can be formed between the unsaturated polyester resin and the styrene.

The curing agent CHP is cumene hydroperoxide which is colorless transparent liquid at normal temperature and can cure unsaturated polyester resin.

In the initiator, the initiator BPO is dibenzoyl peroxide, can be used as an initiator and a crosslinking agent, and has a curing effect on unsaturated polyester resin. The peroxide contains organic peroxide and inorganic peroxide, which can initiate the polymerization reaction of unsaturated polyester resin, and is helpful for improving the overall strength of the formed glass fiber reinforced plastic plate.

In the application, the curing agent CHP and the initiator are matched with each other, which is helpful for forming sufficient crosslinking reaction between styrene in the unsaturated polyester resin and the unsaturated polyester resin, and on one hand, the styrene is not easy to generate residue; on the other hand, the styrene fully generates a crosslinking reaction with the unsaturated polyester resin, which is beneficial to improving the curing effect and the mechanical strength of the formed glass fiber reinforced plastic plate.

More preferably: the initiator of the gel coat layer consists of 0.2 to 0.6 weight part of initiator BPO, 1.0 to 1.5 weight parts of peroxide and 0.1 to 0.15 weight part of cobalt accelerator; the peroxide comprises at least three of 35-45% of methyl ethyl ketone peroxide, 20-45% of dimethyl phthalate, 10-20% of diethylene glycol, 3-7% of methyl ethyl ketone and 1-5% of hydrogen peroxide by mass percentage.

Through the technical scheme, the initiator is formed by mutually matching the BPO, the peroxide and the cobalt accelerator in the range, so that the effect of the initiator is mainly further improved.

In the application, in the peroxide, the methyl ethyl ketone peroxide, the dimethyl phthalate, the diethylene glycol, the methyl ethyl ketone and the hydrogen peroxide have a good plasticizing effect on the unsaturated polyester resin, can initiate a polymerization reaction of the unsaturated polyester resin, and are beneficial to improving the overall strength of the formed glass fiber reinforced plastic plate. The components of the initiator in the mass percentage content range are matched with each other and combined randomly, so that the mixing effect of the unsaturated polyester resin and other components is further improved, the production and processing conditions are reduced, and the mechanical strength of the formed glass fiber reinforced plastic plate can be improved.

More preferably: the infiltration layer comprises the following components in parts by weight:

100 parts of unsaturated polyester resin;

0.5-1.0 part of curing agent CHP;

1.3-2.25 parts of an initiator;

1-2 parts of vinyl monomer multipolymer;

the initiator in the wetting layer comprises at least one of initiator BPO, peroxide and cobalt accelerator.

Through the technical scheme, the vinyl copolymer in the defoaming agent has a good lubricating effect on the glass fiber, so that the glass fiber is favorably soaked by the soaking layer, small bubbles are not easy to generate at the periphery of the glass fiber, the connection tightness between the glass fiber and the soaking layer is further improved, and the strength of the formed base layer is also improved.

The components and dosage range adopted in the wetting layer are the same as those adopted in the gel coat layer, and the base layer comprises a glass fiber layer and a wetting layer for wetting the glass fiber layer, so that the gel coat layer and the wetting layer can be connected more tightly, and the overall strength of the formed glass fiber reinforced plastic plate can be improved finally.

More preferably: the initiator in the infiltration layer consists of 0.2 to 0.6 weight part of initiator BPO, 1.0 to 1.5 weight parts of peroxide and 0.1 to 0.15 weight part of cobalt accelerator; the peroxide comprises at least three of 35-45% of methyl ethyl ketone peroxide, 20-45% of dimethyl phthalate, 10-20% of diethylene glycol, 3-7% of methyl ethyl ketone and 1-5% of hydrogen peroxide by mass percentage.

Through the technical scheme, in the application, the components of the initiator in the mass percentage content range are matched with each other and combined randomly, so that the mixing effect of the unsaturated polyester resin and other components is further improved, the production and processing conditions are reduced, and the mechanical strength of the formed glass fiber reinforced plastic plates can be improved.

The curing agent CHP in the wetting layer is matched with the initiator formed by the initiator BPO, the cobalt accelerator and the peroxide, which is beneficial to forming sufficient crosslinking reaction between the styrene in the unsaturated polyester resin and the unsaturated polyester resin, and on one hand, the styrene is not easy to generate residue; on the other hand, the styrene fully generates a crosslinking reaction with the unsaturated polyester resin, which is beneficial to improving the curing effect and the mechanical strength of the formed glass fiber reinforced plastic plate.

More preferably: the thickness of the gel coat layer is 0.2-0.6mm, and the thickness of the base layer is 0.5-4 mm.

Through the technical scheme, when the thickness of the gel coat layer and the base layer is within the range, the formed glass fiber reinforced plastic plate is moderate in thickness and can have better strength.

More preferably: the unsaturated polyester resin contains 28-34wt% of styrene.

Through the technical scheme, the unsaturated polyester resin containing the styrene in the range is selected, so that better crosslinking effect between the styrene and the unsaturated polyester resin can be realized, on one hand, the styrene can be fully reacted, the residue of the styrene is reduced to the maximum extent, and the obtained glass fiber reinforced plastic plate is free from peculiar smell and reaches the food safety level; on the other hand, the obtained glass fiber reinforced plastic plate has better mechanical strength, is safer in use and has longer service life.

More preferably: the peroxide consists of 35-45% of methyl ethyl ketone peroxide, 20-45% of dimethyl phthalate, 10-20% of diethylene glycol, 3-7% of methyl ethyl ketone and 1-5% of hydrogen peroxide in percentage by mass.

Through the technical scheme, the components in the mass percentage content range are matched with each other and combined randomly, so that the mixing effect of the unsaturated polyester resin and other components is further improved, the production and processing conditions are reduced, and the mechanical strength of the formed glass fiber reinforced plastic plate can be improved.

More preferably: the density of the glass fiber is 2.4-2.7g/cm³。

Through the technical scheme, the glass fiber is in the density range, and the formed glass fiber reinforced plastic plate has more excellent mechanical properties.

The second purpose of the invention is to provide a preparation process of a glass fiber reinforced plastic plate, which solves the problems of excessive odor and insufficient strength of the glass fiber reinforced plastic plate easily caused in the production process, and has the advantages of no peculiar smell, food grade achievement and high strength of the prepared glass fiber reinforced plastic plate.

In order to achieve the second purpose, the invention provides the following technical scheme:

a preparation process of a glass fiber reinforced plastic plate comprises the following steps:

step one, fully mixing unsaturated polyester resin, an accelerator BPO and a cobalt accelerator contained in a gel coat layer according to parts by weight, adding peroxide, and fully mixing; adding a curing agent CHP, and fully mixing to form a first resin mixture;

step two, on the basis of the PET film, uniformly coating the first resin mixture obtained in the step one on the surface of the PET film through a feeding pump and a scraper, continuously baking the PET film and the first resin mixture coated on the PET film for 2.5-3min at the temperature of 80-130 ℃, and curing to form a gel coat layer;

step three, fully mixing unsaturated polyester resin, an accelerator BPO, a cobalt accelerator and a defoaming agent contained in the wetting layer according to parts by weight, adding peroxide, and fully mixing; adding a curing agent CHP, and fully mixing to form a second resin mixture;

step four, the second resin mixture obtained in the step three is spread on the surface of the gel coat layer formed in the step two to form a soaking layer, the glass fibers are uniformly placed in the liquid soaking layer, and the glass fibers are fully soaked to form a base layer;

and step five, uniformly covering a layer of PET film on the surface of the base layer formed in the step four, continuously baking for 5-5.5min at the temperature of 80-130 ℃, curing to form a glass fiber reinforced plastic plate, and tearing off the PET film.

Through the technical scheme, in the first step, the unsaturated polyester resin, the accelerator BPO and the cobalt accelerator are mixed with each other at normal temperature, so that the unsaturated polyester resin and the styrene contained in the unsaturated polyester resin are promoted to react, and the crosslinking reaction can be carried out at a lower temperature. And peroxide is added, so that the crosslinking reaction of the unsaturated polyester resin and styrene can be further improved at a lower temperature in the mixing process. And adding a curing agent CHP, and then fully mixing to help the unsaturated polyester resin and the styrene to continuously and stably carry out crosslinking reaction, so that the styrene in the obtained first resin mixture is fully reacted, and the first resin mixture has no peculiar smell. The same procedure was used to prepare the second resin mixture in step three.

And in the second step, the first resin mixture is coated on a PET film and is fully cured to form a gel coat layer. In the fourth step, the glass fiber is fully and uniformly soaked by the second resin mixture to form a base layer, and the surface of the glass fiber is soaked by the second resin mixture, so that when a layer of PET film is covered, a product before the PET film is more completely crosslinked in a closed space, styrene gas does not overflow, and the formed glass fiber reinforced plastic plate is strong in integrity and free of peculiar smell.

According to the method, the PET film is coated outside the glass fiber reinforced plastic plate formed by the gel coat layer and the base layer, so that the formed glass fiber reinforced plastic plate is completely cured better in a closed environment, the smell is reduced, and after the product is cured, the PET film coated outside is removed.

In conclusion, the invention has the following beneficial effects:

the curing agent CHP is matched with at least one of the initiator BPO, the peroxide and the cobalt accelerator, so that the styrene in the unsaturated polyester resin and the unsaturated polyester resin form a sufficient crosslinking reaction at a lower processing temperature, on one hand, the styrene is not easy to be left, and the formed glass fiber reinforced plastic plate has no peculiar smell; on the other hand, the styrene fully generates crosslinking reaction with the unsaturated polyester resin, which is beneficial to improving the curing effect and the mechanical strength of the formed glass fiber reinforced plastic plate and saving electric energy.

Drawings

FIG. 1 is a schematic sectional view of a sheet material of a glass fiber reinforced plastic in example 1.

In the figure, 1, gel coat layer; 2. a base layer.

Detailed Description

The invention is described in detail below with reference to the figures and examples.