CN101006872A - Artificial flower and its production method - Google Patents

Abstract

The invention relates to an artificial flower made of polyether polyurethane and a manufacturing method thereof. The polyether polyurethane foaming product comprises the following components in percentage by weight: wherein, the component A is as follows: 10 to 99.5 percent of polyether, 0.5 to 30 percent of cross-linking agent, 0 to 15 percent of stabilizing agent, 0.1 to 20 percent of foaming agent and 0 to 10 percent of color paste; the component B comprises: the weight of the isocyanate is 15-90% of the total weight of the component A. Mixing the component A and the component B, and pouring the mixture into a hollow part of a flower model to obtain the simulated real flower. The artificial flower produced by using the polyether polyurethane is rich in elasticity and flexibility, is not easy to break and can be restored to the original shape even if being extruded by external force.

Description

Artificial flower and its production method

technical field

The invention relates to an artificial flower and its manufacturing process, in particular to an artificial flower made of polyurethane polyether foam material and its manufacturing process.

technical background

Artificial flowers are popular household daily necessities and have a wide world market. Usually used for gifts and interior decoration. At present, artificial flowers are generally made of plastic and cotton materials, which do not feel very natural. Artificial flowers made of plastic cannot bring people a feeling of bright colors and moistness like natural flowers. Moreover, plastic flowers are easily deformed and damaged during transportation, storage and use. Once deformed, these plastic flowers will not return to their shape. That is, they have no automatic recovery capability. Recycling used plastic flowers has a certain impact on the environment, such as polyethylene will pollute the environment. Most importantly, polyethylene artificial flowers are easily deformed in high temperature environments. Cotton flowers, in addition to making people feel unnatural in viewing, are also easy to fade and lose luster. Therefore, in order to meet the needs of the growing artificial flower market, we need to solve the above problems from a long-term perspective.

Contents of the invention

One object of this invention is to use polyurethane, especially polyether polyurethane foam, to replace plastic and cotton materials for artificial flowers. Polymers are composed of a series of organic units and polyurethane chains. Wherein the artificial flower comprises at least one simulated petal or one simulated tree leaf, and the weight of the polyurethane polyether foam in this part is at least 50% of the weight of the part; or the weight of the polyurethane polyether foam in the part is at least the weight of the part More than 70% of the weight; or the weight of the part of polyurethane polyether foam is at least more than 90% of the weight of the part.

Polyurethane polyether foam in artificial flowers is produced by reactants such as diisocyanates and polyhydroxy compounds under the catalysis of one or more catalysts. The above-mentioned diisocyanates can be aromatic or aliphatic compounds. The above-mentioned The polyol may be a polyether polyol. The diisocyanate reactant is a skinning type diisocyanate, or a high elastic type diisocyanate, or a mixture of a skinning type diisocyanate and a high elastic type diisocyanate.

The diisocyanate is MDI-50, and the polyether polyol can be polyoxypropylene diol or polyoxypropylene triol. The catalyst is triethylenediamine or dimethylaminoethyl. The reaction described requires the addition of one or more blowing agents. The foaming agent may be dichloromethane, fluorodichloroethane, water or a mixture of the aforementioned substances. The reactions described require the addition of one or more crosslinking agents. The crosslinking agent can be triethanolamine or diethanolamine. The reaction requires the addition of one or more stabilizers, which are silicone foam surfactants.

Polyurethane polyether flowers are more natural to watch, and can even be faked. Taking a sample of this invention as an example, the characteristics of polyurethane polyether flowers can be reflected in the infrared spectrogram Fig. 1, Fig. 2 and Fig. 3. Its infrared spectrum includes the following absorption peaks:

COC: 1100～1250cm ^-1

NH: 3200～3330cm ^-1

C＝O：1640～1755cm ^-1

CN: 1506～1566cm ^-1

Aryl group: 1570～1610cm ^-1 and 650～900cm ^-1

CH: 2800～2990cm ^-1 and 1350～1450cm ^-1

In a particular sample of this invention, the plastic flower was made of polyurethane polyether and its infrared spectrum included the following absorption peaks:

COC: 1100～1250cm ^-1

NH: 3313cm ^-1

C=O: 1728cm ^-1

CO: 1228cm ^-1

CN: 1536cm ^-1

However, according to the invention, the polyurethane polyether foam material for actually making the polyurethane polyether flower may be different from the above description in characteristics. But people in the industry know that the difference in added ingredients will lead to different infrared spectra. In fact, this invention is applicable to any artificial flower. These soft and flexible artificial flower materials are polyurethane polyethers, which are formed by forming polyurethane chains from polyols and isocyanates. In this application and claims, an "artificial flower" is an artificial article made of simulated petals or simulated plant leaves.

Another object of this invention is to provide a new material for the manufacture of artificial flowers, which can be composed of two groups of formulations. Group A components and Group B components, Group A includes 10%-99.5% polyether, 0.5%-30% crosslinking agent, 0%-15% stabilizer, 0%-20% catalyst, 0%- 30% water, 0.1%-20% foaming agent and 0%-10% color paste. Group B includes 15%-90% isocyanate. The weight percent of the components of Group B is calculated based on the total weight of the components of Group A.

Another object of this invention is to provide a manufacturing method for polyurethane polyether artificial flowers. This includes the step of mixing two sets of ingredients: Group A ingredients and Group B ingredients. Group A includes 10%-99.5% polyether, 0.5%-30% crosslinking agent, 0%-15% stabilizer, 0%-20% catalyst, 0%-30% water, 0.1%- 20% foaming agent, and 0%-10% color paste. Group B includes 15%-90% isocyanate. The weight percent of the components of Group B is calculated based on the total weight of the components of Group A.

The preferred formula for making petals is: Group A includes 70%-98.5% polyether, 0.5%-15% crosslinking agent, 0.1%-10% stabilizer, 0.1%-10% catalyst, 0.1%- 15% water, 0.1%-10% foaming agent, and 0.1%-5% color paste. The components of group B include 15%-50% of isocyanate; the weight percentage of the components of group B is calculated based on the total weight of the components of group A.

The preferred formula for making flower stems is: Group A includes 10%-78.5% polyether, 20%-40% grafted polyether, 0.5%-15% crosslinking agent, 0.1%-10% stabilizer, 0.1%-10% catalyst, 0.5%-10% water, 0.1%-5% foaming agent, and 0.1%-5% color paste. The components of group B include 15%-65% of isocyanate; the weight percentage of the components of group B is calculated based on the total weight of the components of group A.

To practice this invention, the chemicals used are as follows: "Polyether" is polyether polyol. The main chain of the compound is composed of numerous ether units (eg, -R-O-R), with two or more hydroxyl (base) hydroxyl groups at the chain end. Polyether polyols are widely used in various industrial fields to make polyurethane polyethers. Typical polyethers suitable for the practice of this invention are polyoxypropylene diols or polyoxypropylene triols. TEP-330N (commercially available) is a typical polyether polyol. The third petrochemical plant at No. 12 Dengzhong Road, Dongli District, Tianjin, China is one supplier of EP-330N; the other is Sinopec Shanghai Gaoqiao Petrochemical Company (3000 Pudong Street, Shanghai, China).

"Grafted polyether" refers to a modified polyether polyol. TPOP36-28 (commercially available) is a typical graft polyether that can be used in this invention (graft polyether is also available from the supplier of EP-330 described above). It is a modified polyether formed by grafting PPG, containing acrylonitrile and styrene. It can be mixed with different PPG to produce highly elastic foam (HR), semi-rigid foam and integral skin foam (ISN) and so on. Foam plastics can be designed with different hardnesses, and have the characteristics of low viscosity and easy processing. Typical quality control standards are: hydroxyl (base) hydroxide value = 25-29 mgKOH/g; water content ≤ 0.05%; PH = 6-9; viscosity ≤ 3500mpa.s/25°C.

The "isocyanates" in the application are diisocyanates, the familiar precursors used in the production of polyurethanes. The preferred diisocyanate for this invention is 1-isocyanato-4-(4-isocyanatobenzyl)benzene or methylene diphenyl diisocyanate (MDI), an aromatic diisocyanate that exists as three isomers , including 2,2'-MDI, 2,4'-MDI, and 4,4'-MDI. The typical isocyanate MDI-50 (available commercially) used in the example is introduced below, (suppliers such as Yantai Wan Hua (Wanhua) Polyurethane Co., Ltd., Address: No. 2, Xingfu South Road, Yantai, Shandong, China Post Code: 264002 Tel: 0086 535 6856091, Fax: 0086 53568371192). IMDI-50 comprises about 50% by weight of the 4,4'-isomer and about 50% by weight of the 2,4'-isomer. At room temperature, it produces a light yellow transparent liquid. Typical quality control standards are: color number ≤ 30 APHA; purity ≥ 99.5%; NCO capacity ≥ 33.3%; cyclohexane insoluble content ≤ 0.3%; hydrolyzed chlorine content ≤ 0.01%; density value at 25°C = 1.19g/ ^cm3

"Skinning isocyanate" or "skinning-like isocyanate" means any isocyanate capable of accelerating the skinning of surface foam. Artists with ordinary skills can choose the appropriate isocyanate according to the skinning effect. In the following example, the skinning isocyanate can meet the following quality standards: molecular weight equal to or greater than 250; functionality equal to or greater than 2.1; NCO capacity equal to or greater than 29. The Huntsman product "5005" is an example of a skinning isocyanate. Such as (supplier Huade Polymer Applied Materials Technology Co., Ltd., address: Longchi Development Zone, Fujian, China)

"Resilient isocyanate" means any isocyanate capable of imparting high resiliency to synthetic foams. An artisan with ordinary skill can select the appropriate isocyanate according to the effect of high elasticity. BASF product "MM-103C" is an example of the use of high elastic isocyanate, such as (supplier, Shanghai Anyu Chemical Co., Ltd., address: Hecheng Building, No. 36 Caobao Road, Xuhui District, Shanghai, China)

"Crosslinking agent" refers to a chemical substance that produces cross-links when polymerized to form polyether polyurethane. People with ordinary skills can choose the appropriate cross-linking agent according to the special purpose to produce polyether polyurethane. In general, the crosslinking agent acts as a catalyst in the process of forming polyether polyurethane, which not only speeds up the chemical reaction, but also ensures the completion of the reaction. The cross-linking agent mentioned below refers to triethanolamine, diethanolamine or a mixture of the two chemicals.

"Stabilizer" refers to a silicone foam surfactant that aids in foam formation and stabilization by increasing the solubility of reactants to speed up the reaction during polymerization. It can be used to adjust the elasticity and texture of synthetic polyether polyurethane foams. The stabilizer depicted in the example below is product No. Y-10366 from Foshan Lixin Chemical Co., Ltd., address: No. 38, Fen South Road, Chancheng District, Foshan, Guangdong, China.

"Blowing agent" is a volatile chemical substance, also called "foaming agent", which is added to the polymerization mixture reactant during the production of polyurethane. Blowing agent A substance that is easily volatilized, such as acetone or methylene chloride, or more complex fluorocarbons. People with ordinary skills can choose suitable foaming agents for special purposes to make polyether polyurethane. The examples below describe blowing agents that are methylene chloride (methylene chloride), 1,1-dichloro-1-fluoroethane, or a mixture of the two chemicals.

The catalysts described below are triethylenediamine (1,4-diazabicyclo(2,2,2)octane), bis(dimethylaminoethyl)bis(2-dimethylaminoethyl)ether(2,2'-oxybis (n,n,-dimethylethylamine) or a mixture of the two chemicals. These are the catalysts of choice, and a person of ordinary skill can use other catalysts with satisfactory results. Moreover, a person of ordinary skill can source Selection of suitable pigments (possibly based on pigments or dyes) will ensure that the synthetic polyether polyurethane flowers will be of the appropriate color when practicing the invention. Water soluble pigments are preferred.

The quality control standards of typical chemical substances in the examples described above are not limiting in this invention. They are listed for the purpose of elucidating the materials used in the examples.

The novelty of this invention is listed in the appendix. In order to better understand the invention, understand its advantages, uses and purposes, the following illustrations and descriptions are illustrated in graphic form:

Description of drawings

Figure 1 shows the results of thermogravimetric analysis of the artificial flower material of the present invention.

Figure 2 is the infrared spectrum of the white artificial flower material, as shown in Example 1.

Figure 3 is the infrared spectrum of the light yellow artificial flower material, as shown in Example 2.

Figure 4 is the infrared spectrum of the red artificial flower material, as shown in Example 3.

specific embodiment

The key feature of this invention is to use polyurethane polyether as the main raw material to make artificial flowers, and as far as the applicant knows, polyurethane polyether has never been used as the main material of artificial flowers before.

Polyurethane is mainly produced by the reaction of diisocyanate (aromatic type or aliphatic type) and polyol, especially polyethylene glycol or polyester polyol, with the participation of catalysts and additives that control the cellular structure. For example, in the case of foaming, surfactants can be used as additives. Altering or enhancing properties, especially density, by varying monomer types and adding specific additives can produce polyurethane polyethers of varying densities and hardness. Other additives can be used to improve the combustion performance, stability in certain chemical environments and other characteristics of polyurethane products. Because relevant knowledge and various polyurethane production technologies are widely known in the industry, the following highlights the typical features of polyurethane polyether products in the present invention. Other types of polyurethanes may be equally suitable for making the artificial flowers of this invention.

Example 1: White lilies (including stems)

Element:

As a typical example of this invention, the white lily is made as follows:

The ingredients for making petals are divided into Group A and Group B. Group A consists of the following materials: 80% polyether, 3% crosslinking agent, 2% stabilizer, 1.5% catalyst, 4% water, 4.2% foaming agent, 1.3% color paste. The components of group B are composed of the following materials: 18% of skin-forming isocyanate, 36% of elastic isocyanate, and the weight percentage of components of group B is calculated based on the total weight of components of group A. In this example, the weight of component A for making artificial lilies is 20 kg. In group B, the weight of skinning isocyanate is 3.6 kg, and that of elastic isocyanate is 7.2 kg.

The ingredients for making flower stems are also divided into Group A and Group B: Group A consists of the following materials: 50% polyether, 25% grafted polyether, 5% crosslinking agent, 3% stabilizer, 6% catalyst, 4% water, 3% foaming agent, 4% color paste. Group B ingredients consist of the following: 40% skinning isocyanate, 20% elastomeric isocyanate, the weight percentages of Group B ingredients are calculated based on the total weight of Group A ingredients, as described above.

The type of polyether used is EP-330N.

The model of grafted polyether is POP 36-28.

The skinning isocyanate is 5005 produced by Huntsman Company of the United States.

Elastic isocyanate is MM-103C produced by BASF, Germany.

The stabilizer is Y-10366 produced by American Gasification GE Company.

The color paste is produced by Perfectchem Co., Ltd. (website: http://www.perfectchem.com email: webmaster@perfectchem.com ).

The crosslinker is a composite of 50% triethanolamine and 50% diethanolamine.

The catalyst is triethylenediamine.

The blowing agent is a compound of 30% methylene chloride and 70% fluorodichloroethane.

Production process:

Put all the ingredients listed above (except the color paste) in a container and stir for 1-2 hours to combine well. Place the lily model in the oven for about 60 minutes. The temperature should be maintained at 50°C. When the temperature reaches the desired temperature, the inner surface of the model is sprayed with release agent and any number of colored paints (made from the selected color paste) and placed on the molding machine to assemble. Then pour or inject the well-mixed ingredients into the inner cavity of the model with a PU syringe to form a lily flower shape. The model is heated to 130°C and maintained at this temperature for about 3-10 minutes. The model is then opened and the formed replica of the lily is removed. Finally, the white color paste is sprayed on the surface of the flower head and flower stem, and then dried and heated to fix the shape, thus an artificial white lily is completed. Because the texture and softness of the petals closely resemble real flowers, artificial lilies look and feel like the real thing. Compared with the existing artificial silk flowers on the market, the artificial flowers of this invention are four times softer and will not be easily broken due to folding. In addition, the gloss and vivid color give the artificial flowers a real effect.

Example 2: Light yellow artificial flowers

Element:

Group A components: 70% polyether, 6% crosslinking agent, 4% stabilizer, 0.5% catalyst, 14% water, 4.2% foaming agent, 1.3% color paste.

Group B components: 10% skinning isocyanate, 45% elastic isocyanate, the weight percentage of group B components is calculated based on the total weight of group A components.

The use of the specific compound is the same as in Example 1, and the production process is also the same as in Example 1. But a yellow color paste was used, mixed with the ingredients of Group A.

Example 3: Red PU artificial flowers

Element:

Group A components: 90% polyether, 2% crosslinking agent, 3% stabilizer, 1% catalyst, 2% water, 1.2% foaming agent, 0.8% color paste.

Components of group B: 60% skin-forming isocyanate, the proportion of components in group B is determined by the total weight of group A.

The use of the specific compound is the same as in Example 1, and the production process is also the same as in Example 1. But a red color paste was used, mixed with the ingredients of Group A.

Example 4: Another Variation of Artificial Flowers

Use the same procedure as Example 1, but with a different recipe. Flowers: group A consists of the following components: 70% polyether, 5% crosslinking agent, 3% stabilizer, 3% catalyst, 7% water, 9% foaming agent, 3% color paste. Group B is composed of the following components: 15% skin-forming isocyanate, 25% elastic isocyanate, and the proportion of each component in group B is determined according to the total weight of group A.

Flower stem: A component: 50% polyether, 25% grafted polyether, 5% crosslinking agent, 3% stabilizer, 6% catalyst, 4% water, 3% foaming agent, 4% color paste. Group B components: 40% skinning isocyanate, 20% elastic isocyanate, the proportion of each component in group B is determined according to the total weight of group A.

The use of the specific compound is the same as in Example 1, and the production process is also the same as in Example 1. But a red color paste was used, mixed with the ingredients of Group A.

Example 5: Another Variation of Artificial Flowers

Use the same procedure as Example 1, but with a different recipe. Flowers: group A consists of the following components: 60% polyether, 8% crosslinking agent, 2% stabilizer, 1.5% catalyst, 8.5% water, 15% foaming agent, 5% color paste. Group B is composed of the following components: 50% elastic isocyanate, and the proportion of each component in group B is determined according to the total weight of group A.

Flower stem: A component: 78.5% polyether, 8% crosslinking agent, 0.1% stabilizer, 1.4% catalyst, 8.5% water, 2% foaming agent, 1.5% color paste. Components of group B: 45% skin-forming isocyanate, the proportion of each component in group B is determined by the total weight of group A.

The use of the specific compound is the same as in Example 1, and the production process is also the same as in Example 1.

As described in Examples 1-3, three sample flowers, white lilies, light yellow flowers and red flowers, have been made, and the following tests have been carried out according to the standards of the American Society for Testing and Materials:

Properties of artificial flowers made according to the invention

In order to prove that the artificial flower made by this invention is different from the character feature of the previous art flower, the sample made by the explanation of example 1-3 has been tested in the following manner.

(1) Qualitative analysis

testing sample White flowers (Example 1); Pale yellow flowers (Example 2); Red flowers (Example 3) test environment Temperature 23±3℃, relative humidity 50±5% Testing purposes Infrared qualitative measurement of raw material formulations Test Methods ASTM E 1252-98, Technical Standard for Qualitative Analysis of Red Spectrum test instrument NICOLET Magna-IR550, spectrometer, Nic-Plan↓ microscope

The following are the test results (infrared spectra in Figures 2, 3, and 4)

sample name Spectrum number Infrared Qualitative Results white flower FT-4139-05 Polyether polyurethane light yellow flowers FT-4140-05 Polyether polyurethane red flower FT-4141-05 Polyether Polyurethane

Infrared spectrum FT-4139-05 shows the following absorption peaks:

-NH: 3313cm ^-1 ; C=O: 1728cm ^-1 ; -CO-: 1094, 1228, 1014cm ^-1 ; -CN-: 1536cm ^-1 ; -CH/CH ₂ /CH ₃ : 2970, 2928, 2868, 1411, 1372cm ^-1 ; aryl structure of benzene ring: 1598, 1510, 1454, 819cm ^-1 . This result proves that the artificial flower is made of polyurethane polyether.

(2) Hardness test:

Using a standard instrument for measuring the hardness of plastic (ASTM D2240-05 standard test method, used for the determination of rubber properties, using PTC digital 511A hardness tester as the test tool), the test results are as follows:

sample Hardness (A) white flower 39 light yellow flowers 46 red flower 31

As shown above, the hardness of the artificial flower in this invention is lower than that of the PE material currently on the market, and this property reduces the possibility of the artificial flower being brittle.

(3) Elasticity measurement

Elasticity measurements were carried out using standard instrumental tests and the results were as follows:

sample Tensile strength (N) Maximum strain (%) maximum the smallest maximum the smallest white flower 30.62 35.45 73.42 105.31 light yellow flowers 25.90 17.88 100.75 79.17 red flower 5.80 4.98 75.52 64.99

As mentioned above, the maximum tension and tensile strength of artificial flowers in this invention are higher than those made of ordinary plastic or cotton, and are closer to real flowers in elasticity, weakness and feel. In the event of extrusion, impact or other external forces, the artificial flower in the invention can be restored to its original shape without permanent deformation.

(4) Temperature stability measurement

The flower samples were subjected to thermogravimetric analysis by gradually increasing the temperature (40°C/min) to 600°C. The results are shown in Figure 1 and as follows:

sample Thermal degradation temperature (℃) White 333.44 light yellow flowers 240.59 red flower 388.10

As shown in Figure 1, when the artificial flower is placed below 250°C, the raw material can withstand this temperature without signs of degradation. Thermal degradation starts when the temperature is higher than 300°C. When the temperature rises to 350°C, the raw material suddenly degrades into small molecules and loses weight. This result shows that the artificial flower has sufficient temperature stability under daily use, and will not melt or deform even under high temperature in summer.

The above tests show that this kind of artificial flower produced by polyether polyurethane is in sharp contrast with traditional flowers (traditional artificial flowers are made of plastic, the hardness is not suitable, lack of elasticity/softness, easy to break, no natural brilliance and liveliness of flowers). The artificial flowers (petals and leaves) in this invention all look and feel more like real flowers, even if they are squeezed by external force, they will return to their original shape. Flower buds and stems and leaves can also be made into the shape of veins, by which wires for support can also be selectively inserted. In addition, the flower stem can use crusting (self-crusting) isocyanate, whose surface is harder than the inner layer, like a real flower stem.

The thickness of the petals in this invention can reach 0.5MM, as thin as a cicada's wing. Even with this thinness, the flowers retain their shape. Producers can make all kinds of flowers according to personal preferences, and use them as decorations to bring happiness to people's lives. For example, the flower-shaped ornaments made of polyurethane polyether using the invention can be equipped on women's clothing or used as headgear and so on. As defined above, "artificial flower" means any artificially manufactured article resembling flower leaves or petals, which may be of various colors.

In addition, as the raw material of flowers, polyurethane polyether is stable and not easy to change. Various flavors, flavors, flame retardants and other additives can be added during breeding. Such additives can have a long-lasting effect in polyurethane polyethers.

Although the unique features of the invention applied to a specific article have been described above, one thing is clear to us. However, on the premise of not departing from the essence of the present invention, those skilled in this technology will make various deletions, replacements or changes to the above-mentioned items in terms of shape or details. The patent for invention is not limited to the items described in the above examples. According to the appended claims, the specific items can be modified and changed in various ways within the scope of the claims.

Claims (26)

1. Artificial flower, which includes at least one simulated petal or one simulated tree leaf, characterized in that: the artificial flower is made of polyether polyurethane. 2. The artificial flower according to claim 1, characterized in that: the weight of the polyurethane polyether foam in the part is at least 50% of the weight of the part. 3. The artificial flower according to claim 2, characterized in that: the weight of said part of polyurethane polyether foam is at least 70% of the weight of this part. 4. The artificial flower according to claim 3, characterized in that: the weight of said part of polyurethane polyether foam is at least 90% of the weight of this part. 5. The artificial flower according to any one of claims 1 to 4, characterized in that: polyurethane polyether foam is produced by diisocyanate and polyhydroxy compound reactants under the catalysis of a catalyst, and the above-mentioned diisocyanate It is an aromatic or aliphatic compound, and the above-mentioned polyhydroxy compound is a polyether polyol. 6. The artificial flower according to claim 5, characterized in that: the diisocyanate reactant is a mixture of crust-type diisocyanate, high-elasticity diisocyanate, or crust-type diisocyanate and high-elasticity type diisocyanate. 7. The artificial flower according to claim 5, characterized in that said diisocyanate is MDI-50, and said polyether polyol can be polyoxypropylene diol or polyoxypropylene triol. 8. According to the artificial flower among the claim 5, it is characterized in that described catalyst is triethylene diamine or bis ether (dimethylaminoethyl). 9. The artificial flower according to claim 5, characterized in that said reaction requires the addition of one or more foaming agents. 10. The artificial flower according to claim 9, characterized in that said blowing agent can be dichloromethane, fluorodichloroethane, water or a mixture of the aforementioned substances. 11. The artificial flower according to claim 5, characterized in that said reaction requires the addition of one or more cross-linking agents. 12. The artificial flower according to claim 11, characterized in that said cross-linking agent can be triethanolamine or diethanolamine. 13. The artificial flower according to claim 5, characterized in that said reaction requires the addition of one or more stabilizers. 14. The artificial flower according to claim 13, characterized in that said stabilizer is a silicone foam surfactant. 15. According to the artificial flower in claim 1, it is characterized in that the infrared spectrum properties of said part, the absorption peak is as follows: 1100-1250cm ^-1 ; 3200-3330cm ^-1 ; 1640-1755cm ^-1 ; 1506-1566cm ^-1 ; 1570-1610cm ^-1 ; 650-900cm ^-1 ; 2800-2990cm ^-1 ; and 1350-1450cm ^-1 . 16. According to the artificial flower in claim 15, it is characterized in that the infrared spectrum properties of said part, the absorption peak is as follows: 1100-1250cm ^-1 ; 3313cm ^-1 ; 1728cm ^-1 ; 1228cm ^-1 ; and 1536cm ^-1 . 17. The method for making artificial flowers according to claim 1, which specifically comprises the following steps: (1) Mixing components of component A and component B to obtain a mixture, component A contains 10% to 99.5% polyether, 0.5 %~30% cross-linking agent, 0%~15% stabilizer, 0%~20% catalyst, 0%~30% water, 0.1%~20% foaming agent, and 0%~10% color paste, composition B The component contains 15% to 90% isocyanate; the weight percentage of component B is calculated based on the total weight of component A; (2) put a hollow template in the oven and maintain a suitable temperature; (3 ) filling the inner space of the above template with the above mixture; (4) heating the above template to make the template reach a sufficient temperature, so as to carry out polymerization reaction and generate polyurethane polyether foam. 18. The production method according to claim 17, characterized in that the components of group A also contain grafted polyether, the weight of which is 20% to 40% of the total weight of the components of group A. 19. The production method according to claim 18, characterized in that the weight of the polyether is 10% to 75% of the total weight of the components of the A component; the weight of the cross-linking agent is 0.5% of the total weight of the components of the A component. % to 15%; the weight of the stabilizer is 0.1% to 10% of the total weight of the A component; the weight of the catalyst is 0.1% to 10% of the total weight of the A component; the weight of the water is the A component 0.5% to 10% of the total weight; the weight of the foaming agent is 0.1% to 5% of the total weight of the A component; the weight of the color paste is 0.1% to 5% of the A component. 20. The production method according to claim 17, characterized in that said polyether is polyoxypropylene diol or polyoxypropylene triol. 21. The method of claim 17, wherein said isocyanate is MDI-50. 22. The production method according to claim 17, characterized in that said catalyst is triethylenediamine or dimethylaminoethyl. 23. The production method according to claim 17, characterized in that said cross-linking agent can be triethanolamine or diethanolamine. 24. The production method according to claim 17, characterized in that said blowing agent can be dichloromethane, fluorodichloroethane, water or a mixture of the aforementioned substances. 25. The production method according to claim 17, characterized in that said stabilizer can be silicone foam surfactant. 26. The production method according to claim 17, characterized in that the temperature of each step must be kept between 120-140°C.

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