A production process of polyurethane soft foam material with multi-color integrated

Abstract

A production process of polyurethane soft foam material with multi-colors integrated, comprising the following steps: providing raw materials for preparing the polyurethane soft foam material; providing a discharging mechanism, which comprises a colorant extruding part, a polyurethane raw material mixing chamber communicating with the colorant extruding part, and a swing discharging part arranged at the discharging end of the polyurethane raw material mixing chamber; mixing the polyurethane raw materials: inputting preselected colorants; opening the mixing switch of the polyurethane raw material mixing chamber while opening one of the at least two switches; opening the switch of the swing discharging part; opening one of the at least two switches at intervals so that the swing discharging part forms impact waves when swinging to foam and form the polyurethane soft foam material with multi-colors integrated. The production process can form various colors combined in various sequences to form a polyurethane foaming material with aesthetic appearance similar to rainbow.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite sponge manufacturing, in particular to a production process of polyurethane soft foam material with multiple colors integrated. BACKGROUND

[0002] Sponge is a kind of widely used porous material, which has elasticity, water absorption, and is divided into natural sponge and synthetic sponge according to the material. Natural sponge is mostly used for body cleaning or painting, while the application field of synthetic sponge is very wide, such as automobile, aviation, battery, furniture, etc. The color of polyurethane product after foaming is relatively single due to the limitation of process and material during the foaming process of polyurethane raw material, and the surface has no any texture and pattern.

[0003] Patent No. 201510383441.9, patent name: preparation method of polyurethane material with irregular texture, which includes the following steps:

[0004] 1) mixing of polyurethane raw material: mixing the polyurethane raw material uniformly in the raw material mixing chamber;

[0005] 2) premixing of colorant: mixing the colorant and diluent uniformly;

[0006] 3) mixing before foaming: before foaming of the polyurethane raw material, the colorant mixed with the diluent is extruded into the polyurethane raw material, and no stirring is performed, the colorant flows into the foaming equipment together with the polyurethane raw material;

[0007] 4) foaming: using foaming equipment and foaming process to produce polyurethane finished product with irregular texture.

[0008] Referring to the disclosure of patent No. 201510383441.9 Figure 2 , the colorant can be extruded into the polyurethane raw material below the raw material mixing chamber, the raw material outlet at the bottom of the mixing chamber 1 is connected with a mixing pipe 2, the circumferential surface of the mixing pipe 2 is vertically provided with at least two rows of colorant inlets 21 which are communicated with the inside of the mixing pipe 2, and the two rows of colorant inlets 21 are evenly staggered on the mixing pipe 2. The colorant inlets 21 are connected with a colorant storage tank through a hose, which stores the colorant mixed with the diluent.

[0009] When the polyurethane raw material in the mixing chamber 1 flows out of the raw material outlet, the colorant also flows from the colorant storage tank into the mixing pipe 2 and is extruded into the polyurethane raw material passing through the mixing pipe 2. Since the colorant and the polyurethane raw material are not stirred during mixing, the colorant cannot be fully mixed in the polyurethane raw material, and when foaming, due to the uneven distribution of the colorant, the foaming and forming polyurethane finished product has a certain irregular texture, as shown in Figs. 5 and 6 disclosed in patent No. 201510383441.9, realizing the polyurethane finished product with irregular texture.

[0010] The patent discloses a technology scheme which can produce polyurethane with irregular texture, but it can only produce one color of polyurethane, and because the colorant is arranged below the raw material mixing chamber and is not stirred in step 3), the colorant is not fully dispersed, so that the color of the produced polyurethane product is irregular and chaotic. At the same time, because it is not stirred and arranged below the raw material mixing chamber, the accumulated colorant cannot be fully attached to the polyurethane material, and the unattached colorant will contaminate the product cover, and the colorant in the polyurethane material will also form rotten bubbles and cavities. Because the colorant is filled in the polyurethane material before foaming, the diluent and colorant do not foam but partially gather into droplets, thereby hindering the formation of uniform cross-linked structure of polyurethane during the foaming process of polyurethane raw material, thus forming rotten bubbles and cavities, thereby greatly affecting the quality of the product, such as supportability. SUMMARY

[0011] Therefore, the present application provides a production process and preparation method of polyurethane soft foam material which can integrate multiple colors.

[0012] A production process of polyurethane soft foam material which can integrate multiple colors, comprising the following steps:

[0013] STEP 101: providing raw materials for preparing the polyurethane soft foam material, the raw materials of the polyurethane soft foam material being composed of polyurethane raw materials and colorants, based on 100 parts of the polyurethane raw materials, the colorants being 0.01-1 parts;

[0014] STEP 102: providing a discharging mechanism, the discharging mechanism comprising a colorant extruding part, a polyurethane raw material mixing chamber communicating with the colorant extruding part, and a swing discharging part arranged at the discharging end of the polyurethane raw material mixing chamber, the colorant extruding part being provided with at least two colorant input pipes and at least two switches arranged on the colorant input pipes respectively, the polyurethane raw material mixing chamber being located between the colorant extruding part and the swing discharging part;

[0015] STEP 103: mixing of polyurethane raw materials: uniformly mixing the polyether in the polyurethane raw material mixing chamber according to the qualified formula proportion;

[0016] STEP 104: inputting preselected colorants: inputting different colorants into different colorant extruding parts respectively;

[0017] STEP 105: opening the mixing switch of the polyurethane raw material mixing chamber while opening one of the at least two switches, so that the colorant enters the polyurethane raw material mixing chamber to mix with the polyurethane raw materials;

[0018] STEP 106: opening the switch of the swing head discharge part to make the raw material of the polyurethane soft foam material spray out;

[0019] STEP 107: opening one of the at least two switches at intervals to make the swing head discharge part form impact corrugation when swinging to foam the polyurethane soft foam material with multiple colors integrated.

[0020] Further, the colorant is 0.01 parts based on 100 parts of the polyurethane raw material.

[0021] Further, the colorant is 1 part based on 100 parts of the polyurethane raw material.

[0022] Further, the colorant is 0.5 parts based on 100 parts of the polyurethane raw material.

[0023] Further, the colorant has at least two colors.

[0024] Further, the switch can be a solenoid valve.

[0025] Further, the discharge mechanism further comprises a control module for controlling the on-off and on-off time of the switch arranged on the different colorant input pipes to obtain products with different color intervals.

[0026] Further, when switching different colorants, the switch of the previous colorant extrusion part is turned off, paused for a certain period of time, and then the switch of the next colorant extrusion part is turned on.

[0027] Compared with the prior art, the production process of the polyurethane soft foam material with multiple colors integrated provided by the present application can mix different colorants with the polyurethane raw material in the polyurethane raw material mixing chamber by arranging at least two colorant extrusion parts in front of the inlet of the polyurethane raw material mixing chamber, so that the colorants can be fully mixed without diluent, and there is no aggregated undispersed colorant, so that there is no blistering and cavitation, ensuring the quality of the product. At the same time, since each colorant extrusion part includes a switch, different colors of colorants can be extruded into the polyurethane raw material mixing chamber at different time periods by controlling the switch, so that not only different colors can be integrated, but also multiple colors can be combined in various orders to form a polyurethane foam material with aesthetic appearance similar to a rainbow. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The flowchart of the production process of the polyurethane soft foam material with multiple colors integrated provided by the present application.

[0029] Figure 2 TheFigure 1 The structure diagram of the discharging mechanism used in the production process of the polyurethane soft foam material with multi-colors integrated.

[0030] Figure 3 The schematic diagram of the polyurethane soft foam material prepared. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application are further described below. It should be understood that the description of the embodiments of the present application herein is not intended to limit the protection scope of the present application.

[0032] As shown in Figure 1 and The flow chart of the production process of the polyurethane soft foam material with multi-colors integrated provided by the present application is shown in Figure 2 The production process of the polyurethane soft foam material with multi-colors integrated includes the following steps:

[0033] STEP 101: providing the raw materials for preparing the polyurethane soft foam material, which is composed of polyurethane raw materials and colorants, based on 100 parts of the polyurethane raw materials, the colorants are 0.01-1 parts. The colorants have at least two colors. The polyurethane raw materials and each colorant can adopt the conventional formula based on polyether in the prior art. The colorants preferably adopt colorants with viscosity ≤2500 mPa.s (25℃) and strong adhesion. The colorants are preferably reactive colorants such as those produced by the American Milliken Company. Any diluent is not required in the raw materials of the polyurethane soft foam material.

[0034] STEP 102: providing a discharging mechanism, which includes a colorant extruding part 10, a polyurethane raw material mixing chamber 20 communicating with the colorant extruding part 10, and a swing discharging part 30 arranged at the discharging end of the polyurethane raw material mixing chamber 20. At least two colorant input pipes 11 are arranged on the colorant extruding part 10, and at least two switches 12 are arranged on the colorant input pipes 11 respectively. The switches 12 can be solenoid valves. The polyurethane raw material mixing chamber 20 is located between the colorant extruding part 10 and the swing discharging part 30.

[0035] STEP 103: mixing of polyurethane raw materials: uniformly mixing the polyether in the polyurethane raw material mixing chamber 20 according to the qualified formula proportion;

[0036] STEP 104: input of preselected colorants: inputting different colorants into different colorant extruding parts 10 respectively;

[0037] STEP 105: open the mixing switch of the polyurethane raw material mixing chamber 20, and open one of the at least two switches 12 to allow the colorant to enter the polyurethane raw material mixing chamber 20 to mix with the polyurethane raw material;

[0038] STEP 106: open the switch of the swing head discharging part 30 to allow the polyurethane soft foam material to be discharged;

[0039] STEP 107: open one of the at least two switches 12 at intervals to allow the swing head discharging part 30 to form impact corrugation when swinging to foam to form the polyurethane soft foam material with multiple colors integrated.

[0040] In STEP 101, in the present invention, the polyurethane material is made of raw materials in the following weight proportions: the colorant is 0.01 parts based on 100 parts of the polyurethane raw material.

[0041] The polyurethane material can also be made of raw materials in the following weight proportions: the colorant is 1 part based on 100 parts of the polyurethane raw material.

[0042] The polyurethane material can also be made of raw materials in the following weight proportions: the colorant is 0.5 parts based on 100 parts of the polyurethane raw material.

[0043] Meanwhile, in the colorant, it can include two, three, or more kinds, and the proportion of each colorant is arbitrary and set according to actual needs.

[0044] In STEP 102, the discharging mechanism should be set according to the requirements of the present invention, and it can be understood that the discharging mechanism also includes a control module for controlling the on-off and on-off time of the switches 12 provided on the different colorant input pipes 11, so as to obtain products with different color intervals. By the on-off time of the switches 12, i.e. the electromagnetic valve, it is possible to allow multiple colorants to appear in the product, so as to make products similar to a rainbow.

[0045] The control module is also used to control the switches of the polyurethane raw material mixing chamber 20 and the swing head discharging part 30 and the time of the switches.

[0046] The colorants of different colors must be squeezed into the polyurethane raw material above the polyurethane raw material mixing chamber 20 and mixed with the polyurethane raw material, i.e. the raw materials such as polyether and additives, in the polyurethane raw material mixing chamber 20. After high-speed stirring in the polyurethane raw material mixing chamber 20, the colorant has been completely dispersed in the polyurethane raw material, and there will be no aggregated colorant liquid in the foam, thereby solving the product defects of rotten foam or hollow in the prior art.

[0047] The swing head discharge part 30, in each time switching color material, the polyurethane material of the color behind impact the polyurethane material of the color before under the swing head action, form a kind of wave-shaped color block.For realizing the product effect, need after color material discharges, empty a time interval not to discharge color material, like this white polyurethane material will impact the polyurethane material of the color before, make the polyurethane material of the color before form wave pattern.When multiple colors, avoid color mixing, twice color material discharges interval also can appropriately leave a gap.

[0048] In STEP103, the polyurethane raw material can include polyether polyol, water, isocyanate, catalyst and the like, which are prior art, and will not be described in detail here.

[0049] In STEP104, when different color materials are extruded into different color material extrusion parts 10, because each color material extrusion part 10 is provided with a switch 12 such as a solenoid valve controlled by a control module, the color material extrusion part 10 will not make the color material enter the polyurethane raw material mixing chamber 20 without receiving instructions from the control module.

[0050] In STEP105, the polyurethane raw material is mixed with the color material to form a polyurethane raw material mixed with color material. Moreover, when different color materials are extruded into the polyurethane raw material mixing chamber 20, they will be mixed in the polyurethane raw material mixing chamber 20.

[0051] In STEP106, when the color material is mixed with the polyurethane raw material, the switch of the swing head discharge part 30 has been opened, at this time no color polyurethane raw material will be extruded first, then the polyurethane raw material mixed with color material is extruded. It is conceivable that when different color materials are switched, different color materials will be mixed in the polyurethane raw material mixing chamber 20 and extruded. It is understood that in order not to let different color materials mix or interfere with each other, when switching different color materials, the switch 12 of the previous color material extrusion part 10 should be closed for a certain period of time before the switch 12 of the next color material extrusion part 10 is opened.

[0052] In STEP107, because the swing head of the swing head discharge part 30 can hit the extruded material to the extruded material when swinging, a wave pattern can be formed, so that it has a certain degree of appreciation.

[0053] By the above steps, a polyurethane soft foam material with multiple colors can be prepared, as shown in Figure 3 .

[0054] Compared with the prior art, the production process of the polyurethane soft foam material with multiple colors integrated provided by the application can make the polyurethane raw material mixing chamber 20 mix different color materials with polyurethane raw materials respectively, so that the color materials can be fully mixed without diluent, and there is no aggregated undispersed color material, so as to avoid the formation of rotten bubbles and cavities, and ensure the quality of the product. At the same time, since each color material extrusion part 10 includes a switch 12, different colors of color materials can be extruded into the polyurethane raw material mixing chamber 20 at different time periods by controlling the switch 12, so that not only different colors can be integrated, but also multiple colors can be combined in various orders to form a polyurethane foaming material with aesthetic appearance similar to a rainbow.

[0055] The above is only the preferred embodiment of the application, and is not used to limit the protection scope of the application. Any modification, equivalent replacement or improvement within the spirit of the application is covered by the claim scope of the application.

Claims

1. A production process for a polyurethane soft foam material capable of integrating multiple colors, comprising the following steps: STEP 101: Providing raw materials for preparing the polyurethane flexible foam material. The raw materials for the polyurethane flexible foam material are composed of a polyurethane raw material and a colorant. Based on 100 parts of the polyurethane raw material, the colorant is 0.01 to 1 part. The colorant has at least two colors. The polyurethane raw material and each colorant adopt a conventional polyether-based formula. STEP 102: Provide a discharging mechanism, comprising a colorant extrusion unit, a polyurethane raw material mixing chamber connected to the colorant extrusion unit, and a swing-head discharging unit disposed at a discharging end of the polyurethane raw material mixing chamber. The colorant extrusion unit is provided with at least two colorant input tubes and at least two switches respectively disposed on the colorant input tubes. The polyurethane raw material mixing chamber is located between the colorant extrusion unit and the swing-head discharging unit. STEP 103: Mixing polyurethane raw materials: uniformly mix the polyether according to the qualified formula ratio in the polyurethane raw material mixing chamber; STEP 104: Input pre-selected pigments: Input different pigments into different pigment input tubes; STEP 105: while turning on the mixing switch of the polyurethane raw material mixing chamber, turn on at least one of the two switches to allow the colorant to enter the polyurethane raw material mixing chamber to be mixed with the polyurethane raw material; STEP 106: Turn on the switch of the swing head discharging part to spray out the raw material of the polyurethane soft foam material; STEP 107: Open at least one of the two switches at intervals so that the swing head discharge part forms shock ripples when swinging to foam and form a polyurethane soft foam material integrating multiple colors.

2. The production process of a polyurethane soft foam material capable of integrating multiple colors as claimed in claim 1, characterized in that: Based on 100 parts of polyurethane raw material, the colorant is 0.01 part.

3. The production process of the polyurethane soft foam material capable of integrating multiple colors as claimed in claim 1, characterized in that: Based on 100 parts of polyurethane raw material and 1 part of colorant.

4. The production process of a polyurethane soft foam material capable of integrating multiple colors as claimed in claim 1, characterized in that: Based on 100 parts of polyurethane raw material, the colorant is 0.5 parts.

5. The production process of the polyurethane soft foam material capable of integrating multiple colors as claimed in claim 1, characterized in that: The switch is a solenoid valve.

6. The process for producing a polyurethane soft foam material capable of integrating multiple colors as claimed in claim 1, characterized in that: The discharging mechanism further comprises a control module, which is used to control the on / off and on / off time of switches provided on different color material input tubes to obtain products with different color intervals.

7. The production process of a polyurethane soft foam material capable of integrating multiple colors as claimed in claim 6, characterized in that: When switching to different colorants, when turning off the switch of the previous colorant input tube, pause for a certain period of time and then turn on the switch of the next colorant input tube.

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