阅读说明：本技术 一种泡绵废料再利用制备泡泡绵的工艺 (Process for preparing foamed cotton by recycling foamed cotton waste ) 是由 龙永杰 于 2019-09-20 设计创作，主要内容包括：本发明涉及泡绵技术领域,具体涉及一种泡绵废料再利用制备泡泡绵的工艺,包括如下步骤：步骤A：将泡绵废料切割成三种不同粒径的颗粒废料；步骤B：将步骤A切割得到的颗粒废料分散均匀,然后加入发泡剂、抗菌剂、色剂、填料,混合搅拌,得到混合物；步骤C：将胶水喷入至步骤B得到的混合物中,搅拌均匀,然后加入至模压设备中进行模压、蒸汽发泡处理,制得发泡料；步骤D：将步骤C制得的发泡料进行裁剪,制得泡泡绵。本发明泡绵废料再利用制备泡泡绵的工艺操作简单,易于控制,生产效率高,能将废弃的泡绵边角料再利用,提高了资源利用率,降低了泡绵的生产成本。(The invention relates to the technical field of foamed plastic, in particular to a process for preparing foamed plastic by recycling foamed plastic waste, which comprises the following steps: step A: cutting the foamed waste into three granular wastes with different grain sizes; and B: b, uniformly dispersing the particle waste obtained by cutting in the step A, adding a foaming agent, an antibacterial agent, a color agent and a filler, and mixing and stirring to obtain a mixture; and C: b, spraying glue into the mixture obtained in the step B, uniformly stirring, adding into a mould pressing device, and carrying out mould pressing and steam foaming treatment to obtain a foaming material; step D: and D, cutting the foaming material prepared in the step C to prepare the foamed cotton. The process for preparing the foamed cotton by recycling the foamed cotton waste material has the advantages of simple operation, easy control and high production efficiency, can recycle the waste foamed cotton leftover materials, improves the resource utilization rate and reduces the production cost of the foamed cotton.)

1. A process for preparing foamed cotton by recycling foamed cotton waste is characterized by comprising the following steps: the method comprises the following steps:

step A: cutting the foamed waste into three granular wastes with different grain sizes;

and B: b, uniformly dispersing the particle waste obtained by cutting in the step A, adding a foaming agent, an antibacterial agent, a color agent and a filler, and mixing and stirring to obtain a mixture;

and C: b, spraying glue into the mixture obtained in the step B, uniformly stirring, adding into a mould pressing device, and carrying out mould pressing and steam foaming treatment to obtain a foaming material;

step D: and D, cutting the foaming material prepared in the step C to prepare the foamed cotton.

2. The process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 1, wherein the process comprises the following steps: in the step B, the mixing weight ratio of the particle waste, the foaming agent, the antibacterial agent, the coloring agent and the filler is 70-80:10-12:3-6:5-8: 18-20; in the step C, the mixing weight ratio of the mixture to the glue is 8-12: 1.

3. The process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 2, wherein the process comprises the following steps: the particle waste is a mixture of small particle waste, medium particle waste and large particle waste in a weight ratio of 5-8:3-6:2, the average particle size of the small particle waste is 1-3mm, the average particle size of the medium particle waste is 4-6mm, and the average particle size of the large particle waste is 10-12 mm.

4. The process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 1, wherein the process comprises the following steps: in the step B, each part of the foaming agent comprises 3-6 parts of azodicarbonamide, 1-2 parts of trihydrazino-s-triazine, 2-3 parts of ethanolamine and 1-2 parts of aluminum potassium sulfate; the antibacterial agent is a mixture consisting of 2, 4, 4-trichloro-2' -hydroxydiphenyl ether and ethylene oxide in a weight ratio of 2-4: 1; the colorant is at least one of lemon yellow, sunset yellow, indigo, brilliant blue, lac red and cranberry red; the filler is at least one of titanium dioxide, ferric oxide and mica powder.

5. The process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 1, wherein the process comprises the following steps: in the step C, the glue is a mixture of rosin resin and epoxy composite resin glue in a weight ratio of 1-2: 3-6; the rosin resin is KL1000W type liquid rosin resin.

6. The process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 1, wherein the process comprises the following steps: in the step C, the temperature of the steam foaming treatment is 200-260 ℃, and the time is 20-30 min; the pressure of the molding is 180-220 tons.

7. The process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 5, wherein the process comprises the following steps: the epoxy composite resin adhesive comprises the following raw materials in parts by weight:

8. the process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 7, wherein the process comprises the following steps: the epoxy resin is CYD-118 type bisphenol A liquid epoxy resin; the terpene resin is GT-30A type liquid terpene resin; the solvent is a mixture of cyclohexane, ethylene glycol and acetone in a weight ratio of 1:3: 2-2.5.

9. The process for preparing foamed plastic by recycling the foamed plastic waste material as claimed in claim 7, wherein the process comprises the following steps: the epoxy composite resin adhesive is prepared by the following steps:

step (1): adding epoxy resin, terpene resin and alumina into two-thirds of the total amount of solvent according to the weight parts, heating to 35-45 ℃, and stirring for 25-28min to obtain a material A;

step (2), adding the emulsifier OP-10 into the rest solvent according to the parts by weight, heating to 45-48 ℃, and uniformly stirring to obtain a material B;

and (3): adding the material B prepared in the step (2) into the material A prepared in the step (1), heating to 52-56 ℃, stirring for 30-40min, adding polybutene, continuously stirring for 18-20min at the temperature of 52-56 ℃, heating to 60 ℃, and keeping the temperature for 30-35min to prepare the epoxy composite resin adhesive for later use.

10. A bubble cotton is characterized in that:the foam is prepared by the process for preparing the foam by recycling the foam waste material as set forth in any one of claims 1 to 9, and the density of the foam is 300-450g/m²。

Technical Field

The invention relates to the technical field of foamed plastic, in particular to a process for preparing foamed plastic by recycling foamed plastic waste.

Background

With the rapid development of society, the usage amount of the foam material is greatly increased, and the foam material is widely applied to products such as cosmetic cotton, washing tools, sofa cushions, automobile cushions, child crash pads and the like due to the advantages of high softness, high elasticity, good water absorption and the like.

However, in the process of preparing the foamed cotton material product, the foamed cotton material basically needs to be cut, and the foamed cotton waste left after cutting becomes waste, which causes waste of resources, and for production enterprises, the recovery of the waste has an important influence on the production cost.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the process for preparing the foamed cotton by recycling the waste foamed cotton, which has the advantages of simple operation, easy control and high production efficiency, can recycle the waste foamed cotton leftover materials, improves the resource utilization rate and reduces the production cost of the foamed cotton.

The invention aims to provide a foam which is soft and comfortable, has high elasticity and a concave-convex surface feeling and is widely applied.

The purpose of the invention is realized by the following technical scheme: a process for preparing foamed cotton by recycling foamed cotton waste comprises the following steps:

step A: cutting the foamed waste into three granular wastes with different grain sizes;

and B: b, uniformly dispersing the particle waste obtained by cutting in the step A, adding a foaming agent, an antibacterial agent, a color agent and a filler, and mixing and stirring to obtain a mixture;

and C: b, spraying glue into the mixture obtained in the step B, uniformly stirring, adding into a mould pressing device, and carrying out mould pressing and steam foaming treatment to obtain a foaming material;

step D: and D, cutting the foaming material prepared in the step C to prepare the foamed cotton.

The process disclosed by the invention is simple to operate, easy to control and high in production efficiency, waste foam leftover materials can be recycled, the regenerated foam is prepared, the resource utilization rate is improved, and the production cost of the foam is reduced.

The waste material of the foam is cut into three particle waste materials with different particle sizes, so that the mixing dispersibility of the waste materials can be improved, and the particle waste materials with different particle sizes are mixed in the waste material of the foam, so that the prepared foam has a hand feeling with concave-convex surfaces; by adding the foaming agent, the subsequent foaming efficiency and effect of the mixture can be improved, the mixture is uniformly foamed, the foaming time is shortened, and the interior of the mixture can be foamed and molded; the adopted antibacterial agent can improve the antibacterial property of the product and prevent bacteria from attaching to the product to propagate; the adopted color agent can be used for mixing colors of the bubble cotton product according to requirements to prepare products with diversified colors; the adopted filler can improve the dispersibility of a mixture system and improve the texture of the foam, and is fine and uniform.

Preferably, in the step B, the mixing weight ratio of the particle waste, the foaming agent, the antibacterial agent, the color agent and the filler is 70-80:10-12:3-6:5-8: 18-20; in the step C, the mixing weight ratio of the mixture to the glue is 8-12: 1. According to the invention, through strictly controlling the consumption of each material, the dispersibility of each material can be improved, the foaming efficiency and effect of the mixture are improved, the antibacterial property is good, and the prepared bubbles are fine and smooth in texture, soft and comfortable, and good in tear resistance; the adhesive force in the foaming material can be improved by strictly controlling the adding amount of the glue, so that the granular material is not easy to loosen, the softness is good, the high-temperature resistance is good, the glue is not easy to harden after the foaming material is foamed at high temperature, and the soft texture of the foamed cotton is not influenced.

Preferably, the particulate waste is a mixture of small particulate waste, medium particulate waste and large particulate waste in a weight ratio of 5-8:3-6:2, the small particulate waste having an average particle size of 1-3mm, the medium particulate waste having an average particle size of 4-6mm, and the large particulate waste having an average particle size of 10-12 mm.

The invention can lead the dispersion of the bubble cotton product system to be better by strictly controlling the mixing proportion and the respective average particle size of the small particle waste, the medium particle waste and the large particle waste, and the particle waste with different particle sizes is mixed in the bubble cotton waste, thus leading the prepared bubble cotton to have the hand feeling of concave-convex surface.

Preferably, in the step B, each part of the foaming agent comprises 3-6 parts of azodicarbonamide, 1-2 parts of trihydrazino-s-triazine, 2-3 parts of ethanolamine and 1-2 parts of aluminum potassium sulfate.

By adopting the foaming agent, the subsequent foaming efficiency and effect of the mixture can be improved, the mixture is uniformly foamed, the foaming time is shortened, and the mixture can be foamed and molded in the interior. Wherein, the azodicarbonamide can make the foam hole that the foaming process produced even and compact, increase elasticity, intensity and the pliability of foam cotton.

Preferably, in the step B, the antibacterial agent is a mixture of 2, 4, 4-trichloro-2' -hydroxydiphenyl ether and ethylene oxide in a weight ratio of 2-4: 1. By adopting the antibacterial agent, the antibacterial property of the product can be improved, and bacteria are prevented from being attached to the product to propagate and breed.

Preferably, in the step B, the colorant is at least one of lemon yellow, sunset yellow, indigo, brilliant blue, lac red and cranberry red. Can color the bubble cotton product according to the requirement to prepare products with diversified colors.

Preferably, in the step B, the filler is at least one of titanium dioxide, iron oxide and mica powder. The filler adopted by the invention can improve the dispersibility of a mixture system and improve the texture of the prepared foamed sponge, and is fine and uniform. More preferably, the filler is a mixture of titanium dioxide, iron oxide and mica powder in a weight ratio of 2-4:1: 3-4.

Preferably, in the step C, the glue is a mixture of rosin resin and epoxy composite resin glue in a weight ratio of 1-2: 3-6; the rosin resin is KL1000W type liquid rosin resin.

The invention adopts the above types as glue, can bond the particle waste, the filler, the color agent, the foaming agent, the antibacterial agent and other raw materials into a mass to form a new foam structure, and then forms a new foam through the subsequent steam foaming and mould pressing treatment; the epoxy composite resin adhesive prepared by the invention has good compatibility with materials, can reduce the viscosity of a material system, improve the adhesiveness and the adhesive force, has strong temperature change resistance and chemical stability, still keeps excellent stability under various seasons and workshop operation conditions, is not easy to age, embrittle and fall off, and can obviously increase the adhesiveness of the adhesive to the system, improve the viscosity and cohesion of the adhesive and improve the dispersibility and adhesiveness of the adhesive to the materials by compounding the rosin resin; the KL1000W type liquid rosin resin has high compatibility with the composite resin adhesive, high heat resistance, low temperature resistance and improved weather resistance.

Preferably, in the step C, the temperature of the steam foaming treatment is 200-260 ℃ and the time is 20-30 min.

According to the invention, by strictly controlling the foaming temperature and time, a system formed by mixing the particle waste and other materials can be fully foamed and molded, and the inner center of the mixture can be fully foamed; if the foaming temperature is too high and the foaming time is too long, the energy consumption and the cost of production are increased, and if the foaming temperature is too low, the foaming at the center inside the mixture is easy to be incomplete, so that the foaming failure is caused, or the foaming time is prolonged, so that the energy consumption and the cost are increased; if the time is too short, the foaming at the center of the interior of the mix is incomplete.

Preferably, in the step C, the pressure for the die pressing is 180-220 tons.

The method can lead the prepared regenerated foamed sponge to have better density and high flexibility by strictly controlling the pressure of the mould pressing, lead the steam to be difficult to penetrate through the mixture if the pressure of the mould pressing is overlarge, lead the mixture to be difficult to be foamed completely by the steam, increase the temperature and time of the steam foaming, increase the energy consumption and the cost, and lead the density of the regenerated foamed sponge to be overhigh and reduce the flexibility of the regenerated foamed sponge if the pressure of the mould pressing is overlarge; and if the molding pressure is too low, the foamed cotton is difficult to form, the density is too low, and the bulk of large-particle waste materials after molding is not high, so that the surface concave-convex hand feeling of the foamed cotton is not obvious.

Preferably, the epoxy composite resin adhesive comprises the following raw materials in parts by weight:

preferably, the epoxy resin is CYD-118 type bisphenol A liquid epoxy resin; the terpene resin is GT-30A type liquid terpene resin; the solvent is a mixture of cyclohexane, ethylene glycol and acetone in a weight ratio of 1:3: 2-2.5.

According to the invention, the epoxy composite resin adhesive is prepared by adopting the raw materials, so that the prepared epoxy composite resin adhesive has better flexibility, high temperature resistance and processing formability, is not easy to harden, and can ensure that the soft texture of foam cotton cannot be influenced by the hardening of the traditional glue after foaming materials at high temperature. The terpene resin and the epoxy resin are compounded, so that the prepared composite resin adhesive has good compatibility with materials, can reduce the viscosity of a foaming material system, improve the adhesiveness and the adhesive force, has strong temperature change resistance and chemical stability, and is difficult to age, embrittle and fall off; the adopted alumina can reinforce the composite resin adhesive and improve the dispersibility of the composite resin adhesive and other materials in the foaming material; the polybutylene adopted by the method has better viscosity, so that the viscosity of the composite resin adhesive can be improved, and the dispersion uniformity of the composite resin adhesive to other materials is further improved; the emulsifying degree of the resin component can be improved by the emulsifier OP-10, so that the prepared composite resin adhesive has better tear strength, tensile strength, oxidation resistance, aging resistance and the like; the adopted solvent improves the spraying ductility of the composite resin glue, so that the glue is easy to uniformly spray in the mixture, and the solvent is easy to volatilize and remove in the steam foaming treatment process, thereby increasing the viscosity of the glue, and the mixture can be bonded into a group to form a new foamed cotton structure.

Preferably, the epoxy composite resin adhesive is prepared by the following steps:

step (1): adding epoxy resin, terpene resin and alumina into two-thirds of the total amount of solvent according to the weight parts, heating to 35-45 ℃, and stirring for 25-28min to obtain a material A;

step (2), adding the emulsifier OP-10 into the rest solvent according to the parts by weight, heating to 45-48 ℃, and uniformly stirring to obtain a material B;

and (3): adding the material B prepared in the step (2) into the material A prepared in the step (1), heating to 52-56 ℃, stirring for 30-40min, adding polybutene, continuously stirring for 18-20min at the temperature of 52-56 ℃, heating to 60 ℃, and keeping the temperature for 30-35min to prepare the epoxy composite resin adhesive for later use.

The epoxy resin and the terpene resin are dispersed by using most of the solvent, and the aluminum oxide is added to improve the dispersibility of the resin system and improve the high temperature resistance, the aging resistance and the strength of the resin system; meanwhile, the residual solvent is compatible with the emulsifier OP-10 to prepare the emulsifier solution, so that the dispersion compatibility of a subsequent emulsifier solution and a resin system of the material A can be improved, the temperature and the stirring time after the material B and the material A are mixed are controlled, the resin system is fully emulsified, the viscosity and the cohesion of the glue are improved, and finally, the polybutylene is added to adjust the viscosity of the composite resin glue, the heat is preserved at 60 ℃, so that the cohesion of the glue is further improved, the glue has certain fluidity and ductility, and the glue is easy to spray out to adhere to a mixture.

The other purpose of the invention is realized by the following technical scheme: the bubble cotton is prepared by the process for preparing the bubble cotton by recycling the bubble cotton waste, and the density of the bubble cotton is 300-450g/m². The bubble cotton prepared by the invention is soft and comfortable, has high elasticity and concave-convex surface feeling, and is widely applied.

The invention has the beneficial effects that: the process for preparing the foamed cotton by recycling the foamed cotton waste material has the advantages of simple operation, easy control and high production efficiency, can recycle the waste foamed cotton leftover materials, improves the resource utilization rate and reduces the production cost of the foamed cotton.

The bubble cotton prepared by the invention is soft and comfortable, has high elasticity and concave-convex surface feeling, and is widely applied.

Detailed Description

The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.