KR20230049425A - Footwear and clothing industry Ultra High Density Polyurethane Slab Foam production method - Google Patents

Abstract

The present invention provides a manufacturing method of UHD PUF foam, a special new material with ultra-high specific gravity for footwear and clothing industries, in which synthetic rubber materials (neoprene rubber, etc.), which have been used for a long time around the world in footwear, shoemaking, and special clothing industries, can be replaced with polyurethane slab foam, which has ultra-high specific gravity, bending resistance, resilience, and high rebound elastic characteristics. According to the present invention, the manufacturing method comprises: a raw material receiving process of receiving raw materials containing polyol and toluene diisocyanate and inspecting temperature, quantity, and receipt; a process of adding the raw materials to each tank and adding a compounding agent and additives, continuously and automatically measuring the raw materials stored in each tank using a precise, automatic chemical metering pump, and mixing the raw materials while a head rotates at high speed after arriving at a mixing/discharging machine along a sealed pipe; a process of manufacturing a foam block by discharging the mixed raw materials from the mixing/discharging machine and transferring the mixed raw materials to an open conveyor moving at a constant speed to foam; a process of cutting the foam block in a vertical direction to a certain length and then moving and stacking the cut foam block; a process of aging the cut foam block for more than 96 hours; a process of cutting the aged foam block in a horizontal direction to a thickness which meets customer requirements; and a process of packaging, loading, and shipping a cut product after screening for defects. Accordingly, costs can be reduced and the supply and demand problem of neoprene rubber can be solved.

Description

UHD PUF manufacturing method, a special new material for the footwear and clothing industry {Footwear and clothing industry Ultra High Density Polyurethane Slab Foam production method}

The present invention relates to a method for manufacturing UHD PUF, a new material for the footwear and apparel industry, and more specifically, synthetic rubber materials (Neoprene Rubber, etc.) , Polyurethane Slab Foam, a new special material with bending resistance, resilience, and high rebound elasticity (hereinafter referred to as "new material UHD PU Slab Foam", simply abbreviated as "new material UHD PUF") It is to provide a special new material UHD PUF manufacturing method.

In general, synthetic rubber has various unique physical and chemical properties that are different from each other depending on the type of material to be polymerized, the polymerization process, and the degree of polymerization, and a large difference occurs in manufacturing cost.

Therefore, when applying synthetic rubber to individual industrial fields, it is necessary to carefully consider the use of the product to be produced, technically analyze the advantages and disadvantages of each unique characteristic of various types of synthetic rubber, and apply it selectively through a test process.

That is, according to the type of polymeric material, there are various types of synthetic rubber as follows.

go. Styrene Butadien Rubber (SBR): It is a polymer obtained by emulsification polymerization so that the ratio of styrene and butadiene is about 1:3.

SBR is the most common synthetic rubber and is also called GR-S or Buna-S. Styrene and butadiene can be obtained in large quantities from the petrochemical industry.

The properties of SBR are almost the same as natural rubber, so it can be vulcanized with sulfur. In addition, high styrene rubber containing about 50% of styrene has particularly high hardness and is used for special purposes as rubber products with high hardness such as soles and heels.

And there is also solution SBR that is used as an emulsion as a polymer processing agent, paper sizing, or adhesive.

me. Polychloroprene Rubber (CR): It is a trans polymer of chloroprene and is also called Neoprene (DuPont's trade name) or Neoprene Rubber as it is well known.

Polymerization methods include solution polymerization and emulsification polymerization. Industrially, emulsification polymerization is widely used, and vulcanization is performed with magnesium oxide.

Heat resistance and weather resistance (耐候性), especially oil resistance is high, but cold resistance is a bit low. It is used as elastic rubber, and is also widely used as a bonding agent for metal-rubber, plastic-rubber, rubber-to-rubber, cloth-coated rubber-leather, etc. in automobiles and shoes.

all. Acrylonitrile-Butadiene Rubber (NBR): It is a copolymer obtained by emulsifying butadiene and acrylonitrile at a ratio of about 2:1.

As is well known, it is also called acrylonitrile butadiene rubber (NBR). It has the best oil resistance to hydrocarbons, and also has excellent heat resistance, ozone resistance and abrasion resistance.

Rubber obtained by mixing 40% or more of polyvinyl chloride with NBR is flame retardant and ozone resistant, and has been put into practical use, albeit on a small scale.

There is also a rubber that is an isoprene-acrylonitrile copolymer called isoprene-acrylonitrile rubber containing 26% of acrylonitrile, and its cold resistance is usually better than that of NBR.

la. Butyl rubber (Isoprene-Isobutylene Rubber, IIR): It is mainly composed of isobutylene polymer, and is copolymerized with about 5% isoprene so that it can be vulcanized with sulfur.

Also known as isoprene-isobutylene rubber. It has excellent aging resistance and ozone resistance because it has few unsaturated bonds, but it has low vulcanization limit and low rebound elasticity.

In addition, it is not used much in tire products because of its drawbacks such as low adhesiveness, but it is used for tire inner tubes and wire cables because of its characteristics such as low gas permeability.

mind. Butadiene Rubber (BR): It is made of a polymer having cis-1, 4 structures by polymerizing butadiene.

This polymerization method was invented in the United States and Italy over several years from 1956. Because it has a certain three-dimensional structure, it is also called stereospecific rubber (stereo rubber) like IR described below.

It is mechanically superior to SBR, and especially has high resilience, cold resistance, and abrasion resistance, and also has low exothermic properties, so it is produced for tires and is expected to dominate as a substitute for natural rubber in the future.

In addition, the trans-1, 4 structure has a use as a hard product such as a golf ball, and recently, rubber mixed with a cis-trans-vinyl structure is manufactured as a tire material that suppresses chipping.

bar. Isoprene Rubber (IR): Refers to 1, 4-polyisoprene, a component of natural rubber obtained by polymerizing isoprene, and is also called synthetic natural rubber.

Previously, only rubbers in which 1, 2, 3, and 4 structures of trans and cis were mixed had been synthesized, but a stereo rubber synthesis method using a Ziegler catalyst and the like was completed in 1954 in the United States. There is an advantage of obtaining a whiter color than natural rubber.

buy. Ethylene Propylene Rubber (EPR): It is a random copolymer copolymerized with 60-70% of ethylene and 30-40% of propylene.

Since it does not contain a double bond, it has excellent heat resistance and ozone resistance, but cannot be vulcanized with sulfur. Therefore, when a diene compound is added as a third component and ternary copolymerization is performed, it can be vulcanized in a ring shape.

This is known as EPDM, and it is excellent in various properties such as weatherability and dielectricity, but the price of the third component, the diene unit, is on the high side. It is used in the manufacture of wire and cable sheathing and conveyor belts.

ah. Polysulfide Rubber: A linear polymer produced by condensation polymerization of an alkaline polysulfide and a suitable alkali halide. Also known as Thiokol.

Various sodium polysulfide and organic dichloride are used as raw materials, and thus polysulfide rubbers with slightly different properties can be manufactured. Polysulfurized rubber is matured by linear growth reaction by mercaptan group-SH at the end of the molecule while other polymers are vulcanized by forming a net shape. It has excellent oil resistance and solvent resistance, hardly passes gas, has good aging resistance and ozone resistance, but has bad smell, and has poor heat resistance, abrasion resistance, and tensile strength. Therefore, it is mainly used for manufacturing gasoline hoses, oil tanks, diaphragms, gaskets, and the like. Liquid polysulfide rubber can be aged at room temperature to make tough and solvent-resistant rubber, and is used for the interior of various devices.

ruler. Silicone Rubber: It is a linear rubber-like polymer obtained by gas decomposition of dichlorosilane. It can be vulcanized with organic peroxides. It is easily vulcanized by introducing a vinyl group into the molecule. It has excellent heat and cold resistance, and good water resistance and electrical insulation, so it is used as a heat-resistant and electrical insulating material for various gaskets, seals, wire and cable sheaths, and conduits for hot fluids. .

car. Fluororubber: A generic term for synthetic rubber containing fluorine. There are many types, but fluorinated acrylate-based, fluorinated vinylidene-based, fluorinated polyester-based, etc. are representative.

It has very good heat resistance, but because it is expensive, it is used only for special applications that require heat resistance. In addition, there is a copolymer of tetrafluoroethylene and trifluoronitrosomethane in fluororubber, which is called nitroso rubber and has excellent solvent resistance, oil resistance and cold resistance.

card. Urethane Rubber: Like resin, it is produced by reacting polyester or polyether glycol with diisocyanate. Polyester glycol is prepared by reacting glycol such as ethylene·propylene·butylene with adipic acid and the like, and has a molecular weight of 1,000 to 2,000.

As the polyether glycol, glycols such as polyoxyethylene, polyoxypropylene, and polyoxytetrahydrofuran are used, and as the diisocyanate, toluene diisocyanate, 4,4-diphenylmethane diisocyanate, and the like are used.

Because of its excellent elasticity, oil resistance and solvent resistance, it is widely used in the manufacture of tire surfaces, small industrial wheels, and shoe heel surfaces. In many cases, carbon dioxide is generated during synthesis to make foam rubber.

get on. Acrylic Rubber: It is produced by polymerization of acrylic acid esters such as ethyl acrylate and butyl acrylate. It is common to copolymerize acrylic acid-2-chloroethyl acrylonitrile, etc. to improve processability.

Vulcanized with polyamine and sulfur. It has good heat resistance and oil resistance, but is weak against water and steam. As the amount of acrylonitrile and copolymer increases, oil resistance improves, but the properties at low temperatures deteriorate, so they are usually contained at about 12%.

As mentioned above, since synthetic rubber shows various differences in different physical and chemical properties and manufacturing (procurement) cost, in industries that want to produce products using it, essential properties and It is important to select technically by comprehensively considering auxiliary characteristics and costs.

In general, in related industries, procurement costs for each type of synthetic rubber, hardness, weather resistance, oil resistance, heat resistance, ozone resistance, chemical resistance, bending resistance, aging resistance, tensile strength, elongation, rebound elasticity, abrasion resistance, low heat generation, solvent resistance, content After technically analyzing differences in properties such as solvency, flame retardancy, cold resistance, adhesiveness, gas permeability, dielectric properties, and odor, and selecting them through various application tests, diaphragms, gaskets, seals, packings, rubber belts, conveyor belts, Rubber lining, tire and tire inner tube, wire cable sheath, heat-resistant and electrical insulating material, exterior or cathode ray tube high voltage terminal cover, rubber lining, tire, tire surface, industrial wheels, shoe outsole, shoe sole. It is widely used not only as a material for heels, but also as a bonding agent for metal-rubber, plastic-rubber, rubber-rubber, and cloth-coated rubber-leather in automobiles and shoes.

(1) Application cases and problems of synthetic rubber materials for shoe uppers in the footwear industry:

go. Symptoms and Problems:

Since the shoes worn by people often move or move from place to place, generally, as the period of use after purchase of shoes elapses, the initial satisfactory size, fit, fit, and sense of unity gradually decrease. ), especially in the instep, the left and right parts behind the instep, and the heel part.

This is because [immersion. tension ↔ restoration in situ] force repeatedly acts on the instep of the upper, the left and right parts of the back of the instep, and the heel during walking or jogging, so that the general upper material used there, such as fiber, synthetic leather, leather, etc. As a result of the long-term repetitive action of [immersion.tension ↔ restoration in place] force, the restoring force is gradually lost in the tensioned state due to fatigue, and the size, fit, fit, and unity felt at the beginning are lost. Of course, to compensate for this, tighten the shoelaces on the top of the foot or, in the case of heels, attach a belt that can be tightened and stretched to add a function that can be tightened and stretched when necessary, such as a waistband.

me. Application of synthetic rubber materials:

To compensate for this, in the shoe industry, synthetic rubber (e.g., Neoprene rubber, etc.), which has been introduced above for a long time and has high elasticity and excellent restoring power, is pulled out into a rectangular flat sheet (usually width x length x thickness (adjustable)). = 100mm x 200mm x 2.0mm) after slicing with a thin sheet, maintaining and supplementing the bending resistance, recovery, and resilience characteristics of the individual rubber sheet itself and improving the tensile strength and elongation of the material, while improving the surface of the material. Spandex with resilience and resilience on the front and back of individual rubber sheets to improve protection and contact with the human body is Spandex Fabric) Upper that is made into a three-layered Triflex Composite by coating-laminating with a nonwoven fabric material, etc., and the [immersion, tension ↔ restoration to original position] force of the shoe repeatedly acts. This composite material is used for the instep of the instep, the left and right parts of the back of the instep, and the heel.

all. Problems caused by the application of synthetic rubber materials:

What is noteworthy here is that in the footwear industry, Triflex laminated composite [Spandex Fabric-Neoprene Rubber-Spandex Fabric] using expensive neoprene rubber is used as a material for shoe uppers:

① Due to the flex resistance, resilience, and resilience of this composite, it appropriately tightens and releases the instep of the shoe, the left and right back of the instep, and the heel area during walking or jogging, with [embedding. tension ↔ restoration to original position] force. It is possible to achieve the intended purpose of maintaining the size, fit, fit, and sense of unity that you had at the beginning of purchasing shoes.

② In addition to the physical properties of this neoprene rubber material, such as flex resistance, recovery, and rebound elasticity, Neoprene Rubber itself has excellent heat resistance and weather resistance, which are unique chemical properties, and especially excellent oil resistance is not only a necessary characteristic for shoe uppers, but also pays high costs in the supply and demand process.

③ Neoprene rubber material is a material for shoe uppers, and it has the following fundamental and chronic problems except for flex resistance, resilience, and resilience. .

la. Chronic problems of synthetic rubber as a shoe upper material

① Due to the high specific gravity of synthetic rubber itself (mainly 200kg/m3), shoes that need to be lightweight become heavy.

② Substances that are necessarily added during the polymerization process of synthetic rubber (e.g., toluene and chlorine in the case of Neoprene Rubber) have been detected in the finished shoe product, and are expected to be designated as toxic substance use restrictions worldwide in the near future.

③ Frequent problems due to unstable market supply and demand

④ Supply and demand prices are high

⑤ Repulsive bad smell is generated in the rubber itself

⑥ Due to the lack of air permeability, sweat builds up when wearing for a long time or when walking or exercising, preventing the release of steam to the outside, causing discomfort and odor.

When a laminated composite using Neoprene Rubber, etc. is applied to the instep of the shoe upper, left and right parts behind the instep, and heel, these composites have properties such as resistance to flexion, resilience, and resilience. .Tension ↔ restoration in place] force repeatedly acts to appropriately tighten the instep of the upper, the left and right parts behind the instep, and the heel, so that the size, fit, fit, and unity that consumers had at the beginning of shoe purchase are continuously maintained even during wearing. However, since it is repeatedly tightened to prevent sweat and steam from escaping to the outside, it interferes with internal and external ventilation, causing discomfort and odor.

⑦ As each flat sheet is supplied (usually width x length x thickness (adjustable) = 100mm x 200mm x 2.0mm), spandex fabric, etc. is attached to the front and back of each sheet of Neoprene Rubber. Nonstop/Continuous production is not possible in the Triflex Composite processing process, resulting in increased processing cost and low yield.

(2) Application examples and problems of wetsuit material synthetic rubber:

In the case of wetsuits worn by people diving in the sea or water, the case is the same as for shoes. For a long time, synthetic rubber (for example, Neoprene Rubber, etc.) flat sheet (usual width x length x thickness (adjustable) = 100mm x 200mm x 2.0mm) is bonded to both sides of spandex woven fabric material, etc. on both sides. ) and processed into a three-layered Triflex Composite material, this material has been used as a material for wetsuits, and is mostly the same material as the material used for shoe uppers.

Of course, in addition to the excellent bending resistance and resilience characteristics of synthetic rubber materials, the advantages and characteristics of synthetic rubber itself (because it is expensive, it is selectively used in special industries), namely weather resistance, oil resistance, heat resistance, chemical resistance, abrasion resistance, In the case of characteristics such as low heat resistance, solvent resistance, and cold resistance, not only are they not most necessary properties or characteristics for wetsuits, but they are paying high costs for this, and have chronic and fundamental problems as follows, except for bending resistance and resilience characteristics However, it was not possible to solve the material to replace it, and in the case of wetsuits, the same material used for shoes was used, so it was necessary to develop alternative materials in the field of wetsuits as well.

go. Chronic problems of synthetic rubber as a wetsuit material synthetic rubber material

① Due to the high specific gravity of synthetic rubber itself (mainly 200kg/m3), the wetsuit that needs to be lightened is heavy.

② Substances essential to the synthetic rubber manufacturing process (e.g., toluene and chlorine in the case of Neoprene Rubber) are also detected in wetsuit products, and are expected to be designated as toxic substance use regulations worldwide in the near future.

③ Frequent problems in stable market supply and demand

④ Supply and demand prices are high

⑤ Repulsive bad smell occurs in rubber itself

⑥ Since it is supplied as an individual flat sheet (usually width x length x thickness (adjustable) = 100mm x 200mm x 2.0mm), 3 layers of laminated composite (Triflex) are applied by bonding and coating-laminating spandex woven fabric materials on both sides. Since nonstop/continuous processing was not possible in the composite process, it had problems such as increased processing cost and low yield.

KR Patent Publication 10-2011-0056568

Therefore, the manufacturing method of UHD PUF, a new material for the footwear and apparel industry provided by the present invention, uses synthetic rubber materials (Neoprene Rubber, etc.), which have been used in the footwear and shoemaking and special apparel industries, as Polyurethane, which has ultra-high specific gravity, bending resistance, resilience and high rebound elasticity. It is to provide a method for manufacturing UHD PUF, a special new material with high specific gravity for the footwear and clothing industry, which can be replaced with slab foam material.

In addition, the present invention provides a UHD PUF material, a special new material with high specific gravity with bending resistance, rebound resistance, weather resistance, heat resistance, and low heat generation, so that it can replace synthetic rubber, is free of toxic substances, has stable market supply and demand, and costs. It is inexpensive, does not generate an aversive bad odor, and does not generate unpleasant odor or odor due to breathability. Unlike the case of Neoprene Rubber, which processes individual flat sheets, continuous production and raw material yield are dramatically improved, reducing costs and Neoprene Rubber supply and demand problems. It is to provide a method for manufacturing UHD PUF, a special new material with high specific gravity, that can solve the problem.

The manufacturing method of UHD PUF, a special new material for the footwear and apparel industry of the present invention;

A raw material warehousing process of receiving raw materials including polyol, toluene diisocyanate, carbon black, silicon, and amine and inspecting temperature, quantity, and receipt;

The above raw materials are put into each tank to mix and add additives, and the raw materials stored in each tank are continuously and automatically metered by a precision, automatic chemical metering pump, continuously supplied along the sealed pipe and blended/discharger (head ) A step of blending while the head rotates at high speed;

manufacturing a foam block by transferring the blended raw materials to an open conveyor moving at a constant speed while blending/discharging from a blender/discharger rotating at high speed;

Step of moving and stacking the foam block after cutting it in a vertical direction to a certain length;

an aging step of aging the cut foam block for at least 96 hours;

a step of horizontally cutting the aged foam block to a continuous constant thickness that meets customer requirements;

It is characterized in that it includes a process of packaging, loading, and shipping after screening the cut product as defective.

In addition, during the foaming process, the foaming temperature is 27±5° C. and the pressure is 1±0.5 bar (under open atmospheric pressure).

The ultra-high specific gravity, special new material UHD PUF manufacturing method for the footwear and apparel industry provided by the present invention provides a number of effects as follows.

① Developed ultra-high specific gravity (approximately 100-170kg/m3) special new UHD PUF material with excellent bending resistance, rebound elasticity, weather resistance, heat resistance, and low heat generation properties of synthetic rubber (eg Neoprene Rubber, etc.), and synthetic rubber Replaced.

② No toxic substances subject to regulation that can be detected in finished shoes.

③ Stable market supply and demand.

④ Low supply cost and excellent fatigue compared to synthetic rubber.

⑤ No repulsive or bad smell in the material itself.

⑥ Air permeability is provided, so sweat and steam are emitted outside during long hours of wearing or walking or exercising, so there is no discomfort or odor.

⑦ Due to the characteristics of the continuous slab foam production process, it is possible to supply a continuous roll unit without a joint knot as long as the length requested by the consumer, so it is a 3-layer laminated composite by bonding and coating-laminating spandex woven fabric materials on both sides. (Triflex Composite) Nonstop/continuous production is possible in the processing process, and the yield of raw materials is dramatically improved.

In addition, it not only solves the chronic problems of synthetic rubber, but also contributes to cost reduction with the effect of lowering the weight of the product as a material with a lower weight than neoprene rubber, and can greatly contribute to solving the unstable neoprene rubber supply and demand problem.

1 is an overall process block diagram showing a preferred embodiment of a method for manufacturing UHD PUF, a special new material with high specific gravity for the footwear and apparel industry provided by the present invention.
Figure 2 is a photograph and block diagram of the entire process showing a preferred embodiment of the UHD PUF manufacturing method, a special new material with high specific gravity for the footwear and clothing industry provided by the present invention.

Hereinafter, specific details for the practice of the present invention will be described with reference to the accompanying drawings. In addition, in the description of the present invention, if it is determined that the related known function may unnecessarily obscure the subject matter of the present invention as an obvious matter to those skilled in the art, the detailed description thereof will be omitted.

As used herein, the terms "about," "substantially," and the like are used in a sense at or approximating that number when manufacturing and material tolerances inherent in the stated meaning are given, and do not convey an understanding of the present invention. Accurate or absolute figures are used to help prevent exploitation by unscrupulous infringers of the disclosed disclosure.

The manufacturing method of UHD PUF, a special new material with high specific gravity for the footwear and apparel industry provided by the present invention, can replace synthetic rubber materials, and has excellent bending resistance, rebound elasticity, weather resistance, and heat resistance of synthetic rubber (eg Neoprene Rubber, etc.) , It is characterized by providing ultra-high specific gravity (about 100-170kg/m3) special new material UHD PUF with low heat generation.

In addition, there are no regulated toxic substances that can be detected in the finished shoe product, stable market supply and demand is possible, and supply and demand costs are lower than synthetic rubber.

In addition, since the material itself does not generate an aversive bad smell and can be given air permeability, sweat and steam are emitted to the outside during long-term ignition, walking or exercise, so there is no discomfort or odor.

In addition, due to the continuous slab foam production process characteristics of a certain required thickness, it is possible to supply continuous roll units without joint knots as much as the length requested by the consumer, so spandex woven fabric materials are bonded to both sides and coated-laminated. Nonstop/continuous production is possible in the 3-ply layered composite (Triflex Composite) processing process, and the yield of raw materials is dramatically improved.

1 and 2 are overall process diagrams showing a preferred embodiment of a method for manufacturing UHD PUF, a special new material with high specific gravity for the footwear and apparel industry provided by the present invention, and the manufacturing method of the present invention will be described together with these drawings.

1. Receipt of raw materials

Several types of raw and subsidiary materials, such as polyol, toluene diisocyanate, carbon black, silicon, and amine, are received and inspected for temperature, quantity, and import.

The properties of the raw material are liquid, and the appearance, color lot No., solid content, viscosity, etc. are compared and measured with standard specifications and previous warehousing lots.

2. Formulation

Raw materials are blended in each tank, and additives are introduced.

Raw materials stored separately in each tank are continuously and automatically metered by precision and automatic chemical metering pumps installed in each tank, and simultaneously arrive at the mixer/discharger (head) along the sealed pipe, and the head rotates at high speed The mixing of raw materials takes place.

At this time, the blowing state, cell size adjustment, aging rate, etc. are adjusted with raw materials other than polyol and toluene diisocyanate, which are the main raw materials.

The blending temperature of raw materials is blended at 27±5°C, and blending is done instantaneously in the blender/discharge machine.

3. Foaming

Mixed raw materials are discharged from a mixer/discharger rotating at high speed and moved to an open conveyor moving at a constant speed, whereby foaming is performed to manufacture a foamed block.

When foaming, the temperature is 27±5℃ and the pressure is 1±0.5 bar (under open atmospheric pressure).

During the foaming operation, carefully manage the pin hole and the flow state of the raw material solution.

In other words, pay attention to sagging of the raw material solution by observing the pin hole of the mixing head discharge part and observing the curing speed, and pay attention to the overlapping of the liquid by looking at the conveyor speed.

4. UHD PUF processing process, a special new material with high specific gravity

(1) Cutting and stacking

Cut the foam block by length.

After cutting the foamed continuous foam blocks of the same lot in the vertical direction to a certain length (standard 50±2m), the cut individual foam blocks are moved to a hoist and loaded. Visually check and manage the appearance and surface condition of foam blocks for each lot.

(2) Aging

The cut foam block is aged for 96 hours or more.

The aging process is a process in which a product in a liquid state is solidified while maintaining shape stability, and is performed in an open state.

(3) foundation

The aged foam block is cut in the horizontal direction to the thickness that meets the customer's requirements.

(4) Packing and moving, loading and shipping

Visually check the appearance of each lot, such as contamination, wrinkles, and folds, select defects, and then pack the finished product.

Move the packaged finished product to the loading area and check for damage such as tearing of the packing material for each lot and appearance condition.

After loading by item and size by lot and final inspection, it is loaded onto the delivery vehicle and shipped.

The present invention configured as described above provides a special new UHD PUF material with excellent bending resistance, rebound resistance, weather resistance, heat resistance, and low heat generation, and can replace synthetic rubber such as Neoprene Rubber for shoe uppers. , There are no toxic substances subject to regulation that can be detected in the finished shoe product, stable market supply and demand is possible, and supply and demand costs are lower than synthetic rubber, and it is possible to realize lightweight products.

In addition, the material itself does not generate an aversive odor, and provides breathability, so that sweat and steam are emitted to the outside during long-term ignition, so there is no discomfort or odor.

In addition, due to the characteristics of the continuous slab foam production process, it is possible to supply continuous roll units without joint knots as much as the thickness and length requested by the consumer, so that spandex woven fabric materials are bonded to both sides and coated-laminated to form 3 layers. Nonstop/continuous production is possible in the cutting and processing process of Triflex Composite, and the yield of raw materials is dramatically improved.

As described above, in the detailed description of the present invention, the most preferred embodiment of the method for manufacturing UHD PUF, a special new material with high specific gravity for the footwear and clothing industry, has been described, but various modifications are possible within the scope of the present invention. will be. Therefore, the scope of protection of the present invention should not be limited to the above embodiments, but the scope of protection should be recognized from the techniques of the claims to be described later and from these techniques to equivalent technical means.

Claims (2)

A raw material warehousing process of receiving raw materials including polyol, toluene diisocyanate, carbon black, silicon, and amine and inspecting temperature, quantity, and receipt;
The above raw materials are put into each tank to mix and add additives, and the raw materials stored in each tank are continuously and automatically metered by a precision, automatic chemical metering pump, and simultaneously arrive at the mixer/discharger along the sealed pipe and rotate at high speed a step of blending by;
A foaming step of manufacturing a foam block by transferring the blended raw materials from a blender/discharger rotating at high speed and moving to an open conveyor moving at a constant speed to foam;
Step of moving and stacking the foam block after cutting it in a vertical direction to a certain length;
An aging step of solidifying the cut foam block by aging for 96 hours or more;
a step of horizontally cutting the aged foam block to a thickness that meets customer requirements;
A method for manufacturing UHD PUF, a special new material with high specific gravity for the footwear and clothing industry, comprising a step of packaging and shipping the cut finished product after screening for defects.
According to claim 1;
The mixing of the raw materials is performed at a temperature of 27 ± 5 ° C,
During the foaming process, the foaming temperature is 27 ± 5 ° C and the pressure is 1 ± 0.5 bar. UHD PUF manufacturing method, a special new material with high specific gravity for the footwear and clothing industry.

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