CN104492067A - PU (polyurethane) protective helmet for taekwondo and preparation process thereof - Google Patents
PU (polyurethane) protective helmet for taekwondo and preparation process thereof Download PDFInfo
- Publication number
- CN104492067A CN104492067A CN201510018014.0A CN201510018014A CN104492067A CN 104492067 A CN104492067 A CN 104492067A CN 201510018014 A CN201510018014 A CN 201510018014A CN 104492067 A CN104492067 A CN 104492067A
- Authority
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- China
- Prior art keywords
- protective helmet
- polyurethane
- cushion part
- mould
- product
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/08—Body-protectors for players or sportsmen, i.e. body-protecting accessories affording protection of body parts against blows or collisions
- A63B71/10—Body-protectors for players or sportsmen, i.e. body-protecting accessories affording protection of body parts against blows or collisions for the head
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
Abstract
The invention discloses a PU (polyurethane) protective helmet for taekwondo and a preparation process thereof. The PU protective helmet comprises a helmet body and an elastic cord, wherein the protective helmet body is an integral structure formed by PU, the left and right sides of the mandible of the protective helmet body are provided with stiffeners, and the elastic cord is connected between the two stiffeners. The preparation process comprises the steps as below: step 1, wiping a mould cavity; step 2, spraying a release agent in the mould cavity; step 3, carrying out die assembly; step 4, injecting a PU raw material into the mould cavity for foaming reaction; step 5, shaking a mould; and step 6, opening the mould and taking out a product after the PU is cured in the mould, and completing the overall preparation process of the product after product trimming and mould cleaning. According to the PU protective helmet provided by the invention, a connecting connection of the mandible of the protective helmet can be enhanced; furthermore, the process is integrally molded and formed by PU, therefore, the service life of the product can be prolonged, the buffer capacity of the product can be improved, the external impact energy can be absorbed better, and the safety of the head of a sportsman can be protected comprehensively.
Description
Technical field
The present invention relates to a kind of protective helmet, refer in particular to a kind of polyurethane protective helmet for tae kwon do and preparation technology thereof.
Background technology
As everyone knows, protective helmet be as protection head from or alleviate mechanicalness collision injury head tool, be widely used in Sports Field; especially in tae kwon do project; protective helmet plays very large protective effect to human body, and therefore, the quality requirement of tae kwon do protective helmet is more strict.
In prior art, main material for the protective helmet of tae kwon do is generally NBR acrylonitrile-butadiene rubber foam or EVA ethylene-vinyl acetate copolymer foam, although the foam cost of this two type is lower, be convenient to produce, but its resilience and buffer capacity poor, outside impact energy cannot be absorbed completely.Meanwhile, the lower jaw both sides of protective helmet are connected by elastic cord, and be only 1 ~ 3 centimetre for the foam width that elastic cord is fixing, when under the motion in fierceness, easily there is situation about rupturing in foam, causes protective helmet to damage, thus cause certain danger to sportsman.
In known production technology, normally first form separately independently sheet material, and then they are pasted together.In some cases, the sheet attaching using adhesive this to be made independently of one another together.In some cases, the sheet material made independently of one another has the shape of elasticity and/or complementation so that it can be connected together or not need adhesive to be pasted together each other.So not only produce very labor intensive, and this protective helmet is subject to the impact of sheet material cannot regulate thickness arbitrarily, is also difficult to absorb or be not enough to dissipating impact force, thus reduces the quality and performance of product.
In view of this, the present inventor's specialized designs a kind of polyurethane protective helmet for tae kwon do and preparation technology thereof, this case produces thus.
Summary of the invention
An object of the present invention is to provide a kind of polyurethane protective helmet for tae kwon do, with the linkage section of reinforcement protection helmet chin, extends the service life of product, improves the buffer capacity of product, absorb outside impact energy better.
Two of object of the present invention is the preparation technology providing a kind of polyurethane protective helmet for tae kwon do, with optimization processing technology.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of polyurethane protective helmet for tae kwon do, comprise protective helmet body and elastic cord, protective helmet body is polyurethane moulded integral structure, and the arranged on left and right sides of protective helmet body lower jaw is equipped with reinforced sheet, and elastic cord is connected between two reinforced sheets.
Described protective helmet body comprises hollow bulb, interface portion, upper cushion part, left cushion part and right cushion part, the corresponding face of hollow bulb is arranged on the front end of protective helmet body, the corresponding forehead portion of upper cushion part is arranged on the top of hollow bulb, interface portion extends to hindbrain place along the crown, and left cushion part and right cushion part lay respectively at the arranged on left and right sides in interface portion.
Described interface portion is interconnected respectively by a plurality of connection strap and upper cushion part, left cushion part and right cushion part, makes the top of protective helmet body form a plurality of hollow-out parts.
In described interface portion, compartment of terrain is laid with a plurality of ventilating opening.
Described left cushion part and right cushion part extend to hindbrain from cheek portion along the arranged on left and right sides of head respectively.
Described left cushion part and right cushion part are equipped with a plurality of exhaust outlet.
For a preparation technology for the polyurethane protective helmet of tae kwon do, it comprises the following steps:
Step 1, with clean calico by mold cavity wiped clean;
Step 2, sprays one deck mould release equably in mold cavity;
Step 3, matched moulds, by mold-locked;
Step 4, injected in mold cavity from perfusing hole by the raw material of polyurethane and carry out foamable reaction, and blocked by perfusing hole with plug immediately, the temperature of mold cavity controls at 30-60 DEG C;
Step 5, shakes mould;
Step 6, wait polyurethane in a mold after slaking die sinking take out product, then through deburring product and mold cleaning, just complete the preparation technology of whole product, the curing time is less than 25 minutes.
The raw material of described polyurethane comprises component A (PPG and auxiliary material) and B component (isocyanates), and the mass ratio of B component/component A is 0.2-0.6; Component A and B component hybrid reaction under temperature is the condition of 20-40 DEG C.
Described component A is formulated by following raw materials by weight portion: PPG 100 parts, chain extender 5-10 part, composite catalyst 1-2 part, surfactant 0.5-1 part, blowing agent 10-20 part.
After adopting such scheme, the present invention has following advantage:
One, protective helmet body of the present invention is polyurethane moulded integral structure, instead of known NBR foam or EVA foam material, considerably improve resilience and the buffer capacity of product, make each position of the protective head helmet can both absorb outside impact energy fully, the safety of Protection of the sportsman head in all directions;
Two, elastic cord of the present invention is connected to the arranged on left and right sides of protective helmet body lower jaw by reinforced sheet, strengthen the linkage section of chin, avoid foam under strenuous exercise and occur the situation of fracture, in the obvious service life extending product, further ensure that the security that sportsman uses;
Three, the present invention is that polyurethane Integral mold is molded, and technique is simple, easy to process, the each position of product is made to there is not gap, ensure that the fastness between each position, whole product has firmly durable, good looking appearance and reliable in quality, meet the advantages such as ergonomics requirement, in process of production, according to the actual needs, the thickness of product can be regulated arbitrarily, be conducive to the barrier propterty improving product key position like this, the perfect further quality of product.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of reinforced sheet of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is right view of the present invention;
Fig. 4 is the A-B place profile of Fig. 3;
Fig. 5 is the structural representation of mould of the present invention.
Label declaration
Protective helmet body 1, hollow bulb 11, interface portion 12, connection strap 121, hollow-out parts 122, ventilating opening 123, upper cushion part 13, left cushion part 14, right cushion part 15, exhaust outlet 151, reinforced sheet 2, installing hole 21, elastic cord 3, mould 4, front template 41, rear pattern plate 42, die shoe 43, core rod 44.
Detailed description of the invention
As shown in Figures 1 to 5, a kind of polyurethane protective helmet for tae kwon do that the present invention discloses, comprise protective helmet body 1 and elastic cord 3, protective helmet body 1 is polyurethane moulded integral structure, the arranged on left and right sides of protective helmet body 1 lower jaw is equipped with reinforced sheet 2, and elastic cord 3 is connected between two reinforced sheets 2.Polyurethane is current material, and polyurethane possesses the excellent properties such as the high and weatherability of degradable, good processability, resilience is good.
In order to the head of more fully Protection of the sportsman, the protective helmet body 1 of this embodiment comprises hollow bulb 11, interface portion 12, upper cushion part 13, left cushion part 14 and right cushion part 15, the corresponding face of hollow bulb 11 is arranged on the front end of protective helmet body 1, the corresponding forehead portion of upper cushion part 13 is arranged on the top of hollow bulb 11, interface portion 12 extends to hindbrain place along the crown, left cushion part 14 and right cushion part 15 lay respectively at the left side in interface portion 12, right both sides, thus enable this protective helmet for before sportsman's head, side, anterior anus and posterior fontanels provide general protection.
The interface portion 12 of this embodiment is interconnected with upper cushion part 13, left cushion part 14 and right cushion part 15 respectively by a plurality of connection strap 121, the top of protective helmet body 1 is made to form a plurality of hollow-out parts 122, so not only strengthen the connectivity between interface portion 12 and other cushion part, improve the quality of product, product is made to meet the requirement of ergonomics, and the hollow-out parts 122 at protective helmet body 1 top can be ventilated for head, avoid bringing discomfort because of head overheating to head.
In order to make brains top better to the air permeability at hindbrain place, in interface portion 12, compartment of terrain is laid with a plurality of ventilating opening 123, thus guarantees that the heat that motion produces can shed from ventilating opening 123 in time, and makes the profile of whole product more attractive in appearance.
Left cushion part 14 extends to hindbrain from cheek portion along the arranged on left and right sides of head respectively with right cushion part 15, thus increases the area of left cushion part 14 and right cushion part 15, also more comprehensive to the protection of head.Left cushion part 14 and right cushion part 15 are equipped with a plurality of exhaust outlet 151, and the heat of head both sides can be discharged from exhaust outlet 151, greatly reduces the heat of head.
In the present embodiment, the forehead place thickness of protective helmet body 1, hindbrain place thickness and temple place thickness are one times of other part thickness, such as going up the thickness that cushion part 13 corresponds to forehead position place is 24mm, the thickness that interface portion 12 corresponds to hindbrain position is 21mm, left cushion part 14, the thickness that right cushion part 15 corresponds to temple position is 23mm, like this can not only reducing human head forehead, hindbrain and temporal foreign impacts power, strengthen the barrier propterty of product, the safety of Protection of the sportsman head more all sidedly, and the overall structure of product meets the requirement of ergonomics, improve the comfortableness that sportsman wears.
The installing hole 21 installed for elastic cord 3 is offered in the junction that reinforced sheet 2 corresponds to elastic cord 3.The installation position of reinforced sheet 2 is equipped with multiple, can be specifically inner surface or outer surface that reinforced sheet 2 is fitted in the arranged on left and right sides of protective helmet body 1 lower jaw respectively; Also can be the arranged on left and right sides that reinforced sheet 2 is embedded in protective helmet body 1 lower jaw respectively, so not only strengthen linkage section, and the profile of protective helmet attractive in appearance.
The material of reinforced sheet 2 has multiple, can only want can reinforcement effect, the reinforced sheet 2 of this embodiment is that organic material or metal are made, organic material is preferably PVC polyvinyl chloride, PP polypropylene or ABS acrylonitrile-butadiene-styrene copolymer, PVC, PP or ABS all have good weatherability and stability, further for the reinforcement effect of reinforced sheet 2 provides guarantee; Metal is preferably aluminium flake, iron plate or alloy, and the hardness of aluminium flake and tensile strength are all comparatively large, is conducive to the structure strengthening reinforced sheet 2; Iron plate has good ductility and toughness, thus improves the performance of reinforced sheet 2; Alloy has that hardness is large, intensity is high and the advantage such as wearability is good, substantially improves the feature of reinforced sheet 2.
The present invention is for the preparation of the technique of the polyurethane protective helmet of tae kwon do, and it comprises the following steps:
Step 1, with clean calico by mould 4 die cavity wiped clean;
Step 2, sprays one deck mould release equably in mould 4 die cavity;
Step 3, matched moulds, locks mould 4;
Step 4, injected in mould 4 die cavity from perfusing hole by the raw material of polyurethane and carry out foamable reaction, and blocked by perfusing hole with plug immediately, the temperature of mould 4 die cavity controls at 30-60 DEG C;
Step 5, shakes mould, and the polyurethane of injection is trickled equably in mold cavity, to guarantee the even density at each position of product, and prevents from occurring bubble in product;
Step 6, wait polyurethane in mould 4 after slaking die sinking take out product, then clear up through deburring product and mould 4, just complete the preparation technology of whole product, the curing time is less than 25 minutes.
In order to make product have better performance indications, the raw material of polyurethane comprises component A (PPG and auxiliary material) and B component (isocyanates), and the mass ratio of B component/component A is 0.2-0.6; Component A and B component are obtained by reacting the polyurethane of this embodiment under temperature is the condition of 20-40 DEG C.Wherein, component A is formulated by following raw materials by weight portion: PPG 100 parts, chain extender 5-10 part, composite catalyst 1-2 part, surfactant 0.5-1 part, blowing agent 10-20 part.The protective helmet obtained by described polyurethane has following performance indications.
The performance indications of table 1 protective helmet
The structure of mould 4 has multiple.In the present embodiment, mould 4 comprises upper bolster and die shoe 43, and upper bolster is made up of front template 41 and rear pattern plate 42, forms die cavity between upper bolster and die shoe 43, is placed with core rod 44 in die cavity.This mould 4 construction is simple, and easy to use, the pattern of die cavity can adjust according to the process requirements of reality, thus makes product meticulousr and reliable.
Embodiment one:
Component A and B component are obtained by reacting the polyurethane of this embodiment under temperature is the condition of 40 DEG C.Wherein, component A is formulated by following raw materials by weight portion: PPG 100 parts (PPG (Mn=5000) 50 parts, polymer polyatomic alcohol 50 parts), chain extender 7 parts (ethylene glycol 3 parts, 1,4 butanediols 4 parts), composite catalyst 1.3 parts (amines catalyst 1.3 parts), 0.75 part, surfactant (0.75 part, silanes surfactant), blowing agent 10 parts (a fluorine dichloroethanes HCFC-141b 10 parts); B component is isocyanates, and the mass ratio of B component/component A is 0.35.
For the preparation of the technique of the polyurethane protective helmet of tae kwon do, it comprises the following steps:
Step 1, with clean calico by mould 4 die cavity wiped clean;
Step 2, sprays one deck mould release equably in mould 4 die cavity;
Step 3, matched moulds, locks mould 4;
Step 4, injected in mould 4 die cavity from perfusing hole by the raw material of polyurethane and carry out foamable reaction, and blocked by perfusing hole with plug immediately, the temperature of mould 4 die cavity controls at 30 DEG C;
Step 5, shakes mould;
Step 6, wait polyurethane in mould 4 after slaking die sinking take out product, then clear up through deburring product and mould 4, just complete the preparation technology of whole product, the curing time is 25 minutes.Test result is as follows:
The performance indications of table 2 protective helmet
Embodiment two:
Component A and B component are obtained by reacting the polyurethane of this embodiment under temperature is the condition of 25 DEG C.Wherein, component A is formulated by following raw materials by weight portion: PPG 100 parts (PEPA 80 parts, polymer polyatomic alcohol 20 parts), chain extender 6 parts (ethylene glycol 4 parts, trimethoxy benzyl ammonia TMP2 part), composite catalyst 1.3 parts (amines catalyst 1.3 parts), 0.6 part, surfactant (0.6 part, silanes surfactant), blowing agent 12 parts (HCFC-141b 12 parts); B component is isocyanates, and the mass ratio of B component/component A is 0.38.
For the preparation of the technique of the polyurethane protective helmet of tae kwon do, it comprises the following steps:
Step 1, with clean calico by mould 4 die cavity wiped clean;
Step 2, sprays one deck mould release equably in mould 4 die cavity;
Step 3, matched moulds, locks mould 4;
Step 4, injected in mould 4 die cavity from perfusing hole by the raw material of polyurethane and carry out foamable reaction, and blocked by perfusing hole with plug immediately, the temperature of mould 4 die cavity controls at 48 DEG C;
Step 5, shakes mould;
Step 6, wait polyurethane in mould 4 after slaking die sinking take out product, then clear up through deburring product and mould 4, just complete the preparation technology of whole product, the curing time is 10 minutes.Test result is as follows:
The performance indications of table 3 protective helmet
Embodiment three:
Component A and B component are obtained by reacting the polyurethane of this embodiment under temperature is the condition of 30 DEG C.Wherein, component A is formulated by following raw materials by weight portion: PPG 100 parts (PTMG (Mn=2000) 30 parts, PPG (Mn=6000) 70 parts), chain extender 8 parts (ethylene glycol 4 parts, MOCA 4 parts), composite catalyst 1.25 parts (amines catalyst 1.2 parts, metallic catalyst 0.05 part), 1 part, surfactant (silanes activating agent 0.9 part), blowing agent 15 parts (HCFC-141b 15 parts); B component is isocyanates, and the mass ratio of B component/component A is 0.42.
For the preparation of the technique of the polyurethane protective helmet of tae kwon do, it comprises the following steps:
Step 1, with clean calico by mould 4 die cavity wiped clean;
Step 2, sprays one deck mould release equably in mould 4 die cavity;
Step 3, matched moulds, locks mould 4;
Step 4, injected in mould 4 die cavity from perfusing hole by the raw material of polyurethane and carry out foamable reaction, and blocked by perfusing hole with plug immediately, the temperature of mould 4 die cavity controls at 60 DEG C;
Step 5, shakes mould;
Step 6, wait polyurethane in mould 4 after slaking die sinking take out product, then clear up through deburring product and mould 4, just complete the preparation technology of whole product, the curing time is 5 minutes.Test result is as follows:
The performance indications of table 4 protective helmet
The present invention has following advantage:
One, protective helmet body of the present invention is polyurethane moulded integral structure, instead of known NBR foam or EVA foam material, considerably improve resilience and the buffer capacity of product, make each position of the protective head helmet can both absorb outside impact energy fully, the safety of Protection of the sportsman head in all directions;
Two, elastic cord of the present invention is connected to the arranged on left and right sides of protective helmet body lower jaw by reinforced sheet, strengthen the linkage section of chin, avoid foam under strenuous exercise and occur the situation of fracture, in the obvious service life extending product, further ensure that the security that sportsman uses;
Three, the present invention is polyurethane integrated injection molding, technique is simple, easy to process, makes each position of product there is not gap, ensure that the fastness between each position, whole product has firmly durable, the advantage such as good looking appearance and reliable in quality, in process of production, can be according to the actual needs, the thickness of product can be regulated arbitrarily, be conducive to the barrier propterty improving product key position like this, the perfect further quality of product.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.
Claims (9)
1. the polyurethane protective helmet for tae kwon do, it is characterized in that: comprise protective helmet body and elastic cord, protective helmet body is polyurethane moulded integral structure, and the arranged on left and right sides of protective helmet body lower jaw is equipped with reinforced sheet, and elastic cord is connected between two reinforced sheets.
2. the polyurethane protective helmet as claimed in claim 1, it is characterized in that: described protective helmet body comprises hollow bulb, interface portion, upper cushion part, left cushion part and right cushion part, the corresponding face of hollow bulb is arranged on the front end of protective helmet body, the corresponding forehead portion of upper cushion part is arranged on the top of hollow bulb, interface portion extends to hindbrain place along the crown, and left cushion part and right cushion part lay respectively at the arranged on left and right sides in interface portion.
3. the polyurethane protective helmet as claimed in claim 2, is characterized in that: described interface portion is interconnected respectively by a plurality of connection strap and upper cushion part, left cushion part and right cushion part, makes the top of protective helmet body form a plurality of hollow-out parts.
4. the polyurethane protective helmet as claimed in claim 2, is characterized in that: in described interface portion, compartment of terrain is laid with a plurality of ventilating opening.
5. the polyurethane protective helmet as claimed in claim 2, is characterized in that: described left cushion part and right cushion part extend to hindbrain from cheek portion along the arranged on left and right sides of head respectively.
6. the polyurethane protective helmet as claimed in claim 2, is characterized in that: described left cushion part and right cushion part are equipped with a plurality of exhaust outlet.
7. the preparation technology of a kind of polyurethane protective helmet for tae kwon do as claimed in claim 1, is characterized in that: it comprises the following steps:
Step 1, with clean calico by mold cavity wiped clean;
Step 2, sprays one deck mould release equably in mold cavity;
Step 3, matched moulds, by mold-locked;
Step 4, injected in mold cavity from perfusing hole by the raw material of polyurethane and carry out foamable reaction, and blocked by perfusing hole with plug, the temperature of mold cavity controls at 30-60 DEG C;
Step 5, shakes mould;
Step 6, wait polyurethane in a mold after slaking die sinking take out product, then through deburring product and mold cleaning, just complete the preparation technology of whole product, the curing time is less than 25 minutes.
8. the preparation technology of a kind of polyurethane protective helmet for tae kwon do as claimed in claim 7, it is characterized in that: the raw material of described polyurethane comprises component A (PPG and auxiliary material) and B component (isocyanates), and the mass ratio of B component/component A is 0.2-0.6; Component A and B component hybrid reaction under temperature is the condition of 20-40 DEG C.
9. the preparation technology of a kind of polyurethane protective helmet for tae kwon do as claimed in claim 8, it is characterized in that: described component A is formulated by following raw materials by weight portion: PPG 100 parts, chain extender 5-10 part, composite catalyst 1-2 part, surfactant 0.5-1 part, blowing agent 10-20 part.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018014.0A CN104492067A (en) | 2015-01-14 | 2015-01-14 | PU (polyurethane) protective helmet for taekwondo and preparation process thereof |
| PCT/CN2015/081364 WO2016112622A1 (en) | 2015-01-14 | 2015-06-12 | Polyurethane protective helmet for taekwondo and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018014.0A CN104492067A (en) | 2015-01-14 | 2015-01-14 | PU (polyurethane) protective helmet for taekwondo and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104492067A true CN104492067A (en) | 2015-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510018014.0A Pending CN104492067A (en) | 2015-01-14 | 2015-01-14 | PU (polyurethane) protective helmet for taekwondo and preparation process thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104492067A (en) |
| WO (1) | WO2016112622A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016112622A1 (en) * | 2015-01-14 | 2016-07-21 | 谢方奎 | Polyurethane protective helmet for taekwondo and preparation process thereof |
| CN106039685A (en) * | 2016-07-26 | 2016-10-26 | 张涛 | Polyurethane protection helmet for Tae Kwon Do |
| CN110776614A (en) * | 2019-10-28 | 2020-02-11 | 肇庆博涵体育用品有限公司 | Soft-hard foam combination process for PU safety helmet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131524A (en) * | 1995-09-19 | 1996-09-25 | 林拯宏 | Safety helmet and its manufacture method |
| CN201911370U (en) * | 2011-02-16 | 2011-08-03 | 吴有红 | Safety helmet for horse riding |
| CN204395396U (en) * | 2015-01-14 | 2015-06-17 | 飞虎(厦门)聚氨酯制品有限公司 | A kind of polyurethane protective helmet for tae kwon do |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492067A (en) * | 2015-01-14 | 2015-04-08 | 飞虎(厦门)聚氨酯制品有限公司 | PU (polyurethane) protective helmet for taekwondo and preparation process thereof |
-
2015
- 2015-01-14 CN CN201510018014.0A patent/CN104492067A/en active Pending
- 2015-06-12 WO PCT/CN2015/081364 patent/WO2016112622A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131524A (en) * | 1995-09-19 | 1996-09-25 | 林拯宏 | Safety helmet and its manufacture method |
| CN201911370U (en) * | 2011-02-16 | 2011-08-03 | 吴有红 | Safety helmet for horse riding |
| CN204395396U (en) * | 2015-01-14 | 2015-06-17 | 飞虎(厦门)聚氨酯制品有限公司 | A kind of polyurethane protective helmet for tae kwon do |
Non-Patent Citations (1)
| Title |
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| 张玉龙: "《塑料配方与制备手册》", 31 December 2010 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016112622A1 (en) * | 2015-01-14 | 2016-07-21 | 谢方奎 | Polyurethane protective helmet for taekwondo and preparation process thereof |
| CN106039685A (en) * | 2016-07-26 | 2016-10-26 | 张涛 | Polyurethane protection helmet for Tae Kwon Do |
| CN110776614A (en) * | 2019-10-28 | 2020-02-11 | 肇庆博涵体育用品有限公司 | Soft-hard foam combination process for PU safety helmet |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016112622A1 (en) | 2016-07-21 |
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Application publication date: 20150408 |