CN1989862B - Toe-cap for safety protection and its production method - Google Patents
Toe-cap for safety protection and its production method Download PDFInfo
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- CN1989862B CN1989862B CN200510112396A CN200510112396A CN1989862B CN 1989862 B CN1989862 B CN 1989862B CN 200510112396 A CN200510112396 A CN 200510112396A CN 200510112396 A CN200510112396 A CN 200510112396A CN 1989862 B CN1989862 B CN 1989862B
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Abstract
The invention involves a security protection toe-cap and its manufacturing method. The toe-cap is pressed by long fiber reinforced thermoplastic resin and fiber cloth, toe-cap top is reinforced and packed by fiber cloth partially, and the fiber weight content of toe-cap is 25-70%; the manufacturing method includes: first preparing the granulated material into small plates, heating the small plates until melting in the heater, moving the small plates into the die in temperature of 40degreeC~120degreeC, then pressing the plates into toe-cap in a certain pressure. Compared with prior technologies, the toe-cap fiber content in the invention and all types of reinforced objects are distributed rationally, the local area performance is higher, and it can meet higher security requirements and make it lighter.
Description
Technical field
The present invention relates to military project and labour protection toe-cap for safety protection and manufacture method thereof.Wherein, toe-cap or toe-case are to be used in the wear of foot, are used for the local toe cap of strengthening shoes on the structure, thus the security that improves shoes.
Background technology
Injured for preventing that tiptoe is subjected to unexpected strong bump, initial safety toes has the toe-cap that is made of a steel in using, yet, make the security protection toe-cap that is made of a steel, will increase the weight of protection toe-cap, increase people's live load.Simultaneously, for special force, the steel safety toes can not be by the safety detection in magnetic field, to counteract activity, for this reason, develop at present the toe-cap that the thermosetting that strengthened by the reinforcing fibre with glass fibre and so on and thermoplastic resin are made, thereby alleviate the weight of protective footwear with this, simultaneously, to special force, can be smoothly safety check by special place.
Because the charge that toe-cap made from the thermosetting resin of non-environmental protection or toe-case will be faced with environmental pollution, therefore, thermoplastic resin is trend place from now in the middle of developing as the material of safety toes.
Initial is that the thermoplastic resin that contains reinforcing fibre is made sheet material with the making material of thermoplas tic resin composite as such toe-cap, makes toe-cap by the sheet material mold pressing again.Specifically, be that the sheet material that will contain the thermoplastic resin of reinforcing fibre is cut into trapezoidal shape and carries out weighing according to toe-cap.At this moment, be difficult to sheet material is cut into fixing weight.Therefore, the weight of the sheet material that cuts out for adjusting applies to the sheet spare of the suitable shape of a slice the appropriate position on the sheet material usually, and for example by far-infrared heating stove the sheet material that forms is heated, and makes the material fusion softening.As shown in Figure 1, the sheet material 10 that will be under the soft state is placed in the depression 12 of a shaping dies or instrument 11b, exert pressure and the situation of heat under carry out the compression molded toe-cap that forms.
To cause following problem by the said method moulding:
(1) because the material of slabbing must carry out the plasticising processing by fusion once more, so material trends towards oxidation and hot deterioration;
When (2) being fed in a molding tool after sheet material is through cutting and hot melt effect, it must be forced to crooked to be placed in the mould.Therefore be difficult to realize automation and rationalization;
(3) use sheet material to come that sheet material is carried out the weight adjusting and can cause some problems like this, descend or change as the intensity that produces weld seam or toe-cap at the article that form.
For addressing the above problem, patent 02129732.0 is addressed a kind of preparation method who protects toe-cap.
A kind of preparation method who protects toe-cap that this patent is addressed is: the fiber particle material of placing long fiber reinforced thermoplastic resin in a plan shaping dies, intend toe-cap 1 to begin to take shape one applying under the situation of heat the described fiber particle material of extruding, see Fig. 2.The plan toe-cap that forms is placed in the position in the mould that is used to form protective shoe toecap, sees Fig. 3, and exert pressure and heat is seen Fig. 4 with the toe-cap of compression molded protective footwear to described plan toe-cap.
Method that this patent is addressed and prepared toe-cap thereof have the following disadvantages:
(1) long fibre is not orientated in toe-cap, and intensity is roughly even everywhere, but protects toe-cap, and especially military toe-cap is very high for the intensity and the impact property requirement of toe-cap tip position, and the toe-cap of this method preparation is difficult to satisfy the high standard toe-cap to performance demands;
(2) because the automatic weighing of long fibre is directly sent in the plan toe-cap mould, be not suitable for preparing the local toe-cap of strengthening;
(3) because fiber orientation isotropism is not suitable for adopting the local mode of strengthening again, so prepare the toe-cap of identical performance standard, needed glass volume content is higher, has increased the weight of toe-cap virtually;
(4) the same with preceding method, the described method of this patent has adopted post bake equally, does not solve the problem that material trends towards oxidation and hot deterioration, has the phenomenon that wastes energy too;
(5) therefore this method will, need be cooled off mould once more to the toe-cap mold heated to intending the toe-cap fusion, and toe-cap can will influence production efficiency like this with moulding, cause energy waste simultaneously.
Summary of the invention
An object of the present invention is to provide a kind of more high performance toe-cap for safety protection.Adopt the safety shoe of this toe-cap can avoid the problems referred to above, fiber content and all kinds of reinforce rationally distribute, and the regional area performance is higher, satisfy the requirement of greater security energy, make its weight lighter simultaneously.
Another object of the present invention provides a kind of production method of toe-cap for safety protection.This method can solve above-mentioned those such as wasting energy, can not local reinforcement etc. problem, thereby produce the toe-cap that more high-intensity protective footwear is used.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of toe-cap for safety protection is characterized in that, this toe-cap is formed by fiber reinforced thermoplastic resin and fiber cloth compacting, and local the enhancing and parcel done with fiber cloth in the toe-cap top, and the fibre weight content of toe-cap is between 25～70%.
Described long fibre is glass fibre or carbon fiber.
Described thermoplastic resin is one or more of polypropylene, nylon, PET (PET), Merlon.
Described long fiber length is greater than 20mm, and its maximum length equals the toe-cap width.
Described long fiber length is lack of alignment greater than 20mm during less than toe-cap appearance and size, and its size and toe-cap size be when similar, be unidirectional continuously or quadrature or interweave at an angle arrange continuously.
Described fiber cloth is one or more of glass fabric, carbon fiber, polypropylene fibre cloth or Fypro cloth.
A kind of production method of above-mentioned toe-cap for safety protection, it is characterized in that, fiber cloth with long fibre particulate material and an enhancing or package action, in heater, make sheet material after the fusion, again sheet material is cut into the polylith platelet, after the platelet heating and melting, place the toe-cap mould, the compression moulding toe-cap.
Described sheet material is with long fibre particulate material and fiber cloth shop layer, 1 under 5MPa pressure, 180～280 ℃ temperature compacted under.
The mode of heating of described heater can be the resistance heat air circulation, but preferentially selects the high Far-infrared Heating mode of the efficiency of heating surface.
The invention provides the toe-cap that a kind of safety shoe is used, this toe-cap with continuously/fiber reinforced thermoplastic resin makes, this thermoplastic resin also can be to strengthen or the sheet material of parcel by glass fabric or polymer fiber cloth are local.
In a preferred embodiment of the present invention, the fibrous plate of preparation toe-cap is the thermoplastic resin sheet material that three layers of quadrature continuous fiber strengthen, and the local enhancing of the fiber cloth of 300tex is used at the top of toe-cap, and fiber content is 65% in the toe-cap, this toe-cap is in light weight, shows high intensity.
The present invention also provides a kind of preparation methods that is used to prepare high strength security protection toe-cap. and this preparation method is, earlier the long fibre particulate material evenly is placed on the iron plate, pass through a heater together with iron plate, such as the Far-infrared Heating case, this heating cabinet is preferably with the chain transmitting device, by regulating the temperature in the heater compartment, generally between 180～280 ℃, and the transmission speed of material, just in time evenly fusion was put into cold moudling in the plate forming mould with material together with iron plate then when material was come out from the heater other end.
In a preferred embodiment of this method, more than the long fibre particulate material length 75mm, until can be the same with the length of sheet material long with width.With at least three layers of long fibre particulate material quadrature tilings, repave the local 300tex glass fabric of strengthening usefulness on two surfaces up and down, get final product sheet forming with said method.The fibre weight content of sheet material is 25～70%, and the thickness of sheet material is 2～8mm.And then, sheet material is cut into fritter sheet material according to certain weight requirements, be used for the moulding toe-cap.
The present invention also provides a kind of method of protective footwear with toe-cap that be used to produce, and the characteristics of this method are to comprise: the fritter sheet material that will cut and have certain mass is positioned in the heater compartment, and this heating cabinet is preferably with the chain transmitting device.Allow little sheet material pass through heater, make it complete fusion with certain speed.Be placed in the die cavity of toe-cap moulding with the artificial or manipulator little sheet material with complete fusion then, core rod down moves, and sheet material is imposed certain pressure, the final molding toe-cap.
In a preferred embodiment of this method, preparation length and width all are the sheet material of 150mm earlier, long fibre particulate material length is the same with the length and the width of sheet material, promptly the form with continuous fiber exists, in the upper and lower surface of sheet material the glass fabric of local booster action has been arranged, sheet material has been cut into the little sheet material of about 75 grams of weight.Little sheet material is positioned over one again and has in the far-infrared heater of chain transmitting device, the temperature of far-infrared heater can be regulated between 220～270 ℃, and little sheet material by heater, makes it complete fusion with certain speed.Be placed in the die cavity of toe-cap moulding with the little sheet material of manipulator with complete fusion then, mold temperature is between 40～120 ℃.Core rod down moves, and sheet material is imposed the pressure of 40MPa, and cooling and shaping behind the 2min through simple repairing, obtains final toe-cap after the taking-up.
Compared with prior art, toe-cap for safety protection fiber content of the present invention and all kinds of reinforce rationally distribute, and the regional area performance is higher, satisfy the requirement of greater security energy, make its weight lighter simultaneously, this toe-cap can satisfy Canada, US and European to the highest standard of safety toes; Simultaneously, the inventive method can solve above-mentioned such as wasting energy, can not local reinforcement etc. problem, thereby produce the toe-cap that more high-intensity protective footwear is used.
Description of drawings
Fig. 1 is a partial sectional view that schematically illustrates the example of the conventional procedures of using molded sheet to form toe-cap, and shown in it is compression molded situation before;
Fig. 2 is the stereogram that schematically illustrates example that can plan toe-cap used in this invention;
Fig. 3 is the partial sectional view that schematically illustrates the example of a step that is used to form the plan toe-cap of describing in the patent before this, and shown in it is situation before compression molded;
Fig. 4 is that cutaway view cuts open in the office that schematically illustrates the example of a step that is used for forming toe-cap of the present invention when compression molded;
Fig. 5 is the sheet material that schematically illustrates the continuous fiber enhancing of long fibre particulate material preparation;
Fig. 6 schematically illustrates the Far-infrared Heating device that has the chain transmitting device.
The specific embodiment
The toe-cap of safety shoe of the present invention by continuously/long fiber reinforced thermoplastic resin makes, in a kind of preferred approach of producing toe-cap, essential characteristic comprises: the long fibre particulate material of certain-length is made the sheet material that unidirectional continuous fiber strengthens or also have the local enhancing of glass fabric; Sheet material is heated to the degree of fusion; The sheet material of the fusion that obtains is placed in the toe-cap mould; Fused materials is applied certain pressure, thus compression molded one-tenth safety shoe head.
Specifically, be used to produce first feature according to the method for toe-cap of the present invention based on such actual conditions, the plan toe-cap directly made of the long fibre pellet of Shi Yonging perhaps uses the toe-cap of sheet forming all can not satisfy the high toe-cap of security requirement before this on performance before this.Method medium-length fibre particulate material described in the invention must be made sheet material earlier, the length of fiber can be the same with the length and the width of sheet material, and parallel orthogonal is arranged, upper and lower surface at sheet material can have local humidification or be used for wrapping up the polymer fiber cloth of preventing glass emergence on the surface, and such sheet material can satisfy more high performance requirement.
Second feature is based on such actual conditions, be molded into toe-cap and particulate material elder generation moulding plan toe-cap with common sheet material before this, it is different to be molded into toe-cap again, and the little sheet material of fusion directly is put into the die for molding toe-cap, can avoid the fusion seam and form intending the die cost that toe-cap is used.
In traditional method, the plasticising of sheet material generally by using a kind of far infrared system and device to realize, is handled for material being carried out plasticising, and this far infrared system and device can increase production cost greatly and spend the plenty of time.For addressing the above problem, patent 02129732.0 adopts the fiber grain material of long fiber reinforced thermoplastic resin, thinner because of it, so can directly heat plasticising within a short period of time in intending the toe-cap mould handles, but bringing thus such as increasing production efficiency, this patent just must make many plan toe-cap moulds, and directly fiber being placed the mold pressing of plan toe-cap, fiber is in disordered state, does not have problems such as local reinforcement.
In method described in the invention, the melt process of little sheet material is to be placed in the Far-infrared Heating casing that has chain circle transmission device, continuous mode of heating has like this improved production efficiency greatly, reduced the manufacturing expense of equipment, the more important thing is and to make the protective footwear that greater security requires.The protection toe-cap of this method preparation can not only satisfy the security requirement of each rank protective footwear head among JIS (Japanese Industrial Standards) T8101, can also satisfy the security requirement to each rank protective footwear of Canada that requirements at the higher level are arranged, US and European.
Describe the present invention hereinafter with reference to accompanying drawing.
In the production that is used for the toe-cap of safety shoe according to the present invention,,, determine the length of long fiber reinforced thermoplastic resin particle material at first according to the rank of safety toes to security requirement as hereinafter describing.If the JIS levels of the standard, the length of then guaranteeing the long fibre particulate material is more than 20mm, if Canada or Unite States Standard then make the length of long fibre particulate material the same with the board dimension that will make, and make the sheet material that continuous fiber strengthens, if the security protection toe-cap is a highest level in the European standard, then add layer of glass cloth, play local humidification on two surfaces up and down of sheet material.The thickness of fibrous plate is generally at 2～8mm, and concrete thickness determines that according to the toe-cap level of security usually, level of security is high more, and the sheet material desired thickness is thick more.Fig. 5 is the continuous fiber enhancing but does not have the local fiberboard that strengthens.
Then, according to the required weight of toe-cap, sheet material is cut into the platelet 2 of constant weight.Platelet is placed in the heater 4 of chain transmitting device 3, this heater can be recirculated hot air or far infra-red heater.The temperature of heater is between 180～280 ℃, and the transmission speed of chain is adjusted according to the thickness of sheet material and the temperature of heater, makes platelet reach the degree of complete fusion.Fig. 6 is the far-infrared heater that has the chain transmitting device that is placed with platelet.
After with the platelet heating and melting, platelet is put in the toe-cap compression mould, as shown in Figure 1 with artificial or manipulator.Core rod 13 down moves, and imposes the pressure of 25～120MPa for the fusion platelet, makes it final molding, and as shown in Figure 4,15 is to eject to use push rod among the figure.
Below will enumerate some embodiment, in an embodiment, the protection toe-cap is to use the fiber grain of long fiber reinforced thermoplastic resin of the present invention to prepare, and these embodiment have confirmed the physical characteristic that comprises intensity and further feature by the toe-cap proof that obtains.
Embodiment 1
The glass fabric of the layer overlay 300tex on corrosion resistant plate of elder generation, then with fiberglass reinforced acrylic resin particulate material (the LFT pellet that adopt outstanding thing outstanding company produce of length for the about 2mm of 150mm diameter, fibre weight content 65%), quadrature tiles three layers, spreads the glass fabric of one deck 300tex more in the above.The temperature that has the chain transmitting device that the material completed is put into the about 2m of length together with corrosion resistant plate is that transmission speed is 2m/min in 220 ℃ the Far-infrared Heating case.Then, the material that fusion is good is put in 50 tons the flat plate mold of platen-press, imposes the pressure of 25MPa, takes out the sheet material of moulding behind the 1min, and this board dimension is 150mm * 150mm * 5mm.
With the sheet material of above-mentioned forming with the disposable platelet that cuts into four 75mm * 75mm * 5mm of plate-punching machine, with platelet be put into above-mentioned far-infrared heater similar add heating and melting in the heat transfer apparatus, with manipulator four good platelets of fusion being put into one then goes out in the mould of four moulds, and under 100 ℃, carry out compression moldedly with the pressure of 80MPa, produce toe-cap.
Elder generation's layer overlay carbon cloth on corrosion resistant plate, then with fiberglass reinforced polyacrylic resin material material (the LFT product that adopt outstanding thing outstanding company produce of length for the about 2mm of 100mm diameter, fibre weight content 65%), one deck carbon cloth is spread in three layers of quadrature tilings more in the above.The temperature that has the chain transmitting device that the material completed is put into the about 2m of length together with corrosion resistant plate is that transmission speed is 2m/min in 220 ℃ the Far-infrared Heating case.Then, the material that fusion is good is put in 50 tons the flat plate mold of platen-press, imposes the pressure of 25MPa, takes out the sheet material of moulding behind the 1min.
With the sheet material of above-mentioned forming with the disposable platelet that cuts into four 75mm * 75mm * 5mm of plate-punching machine, with platelet be put into above-mentioned far-infrared heater similar add heating and melting in the heat transfer apparatus, with manipulator four good platelets of fusion being put into one then goes out in the mould of four moulds, and under 100 ℃, carry out compression moldedly with the pressure of 80MPa, produce toe-cap.
The glass fabric of the layer overlay 300tex on corrosion resistant plate of elder generation, then length (is adopted the outstanding LFT of company of outstanding thing for the reinforced nylon 6 resin particulate material of the carbon fiber of the about 2mm of 80mm diameter, fibre weight content 50%), quadrature tiles three layers, spreads the glass fabric of one deck 300tex more in the above.The temperature that has the chain transmitting device that the material completed is put into the about 2m of length together with corrosion resistant plate is that transmission speed is 2m/min in 270 ℃ the Far-infrared Heating case.Then, the material that fusion is good is put in 50 tons the flat plate mold of platen-press, imposes the pressure of 30MPa, takes out the sheet material of moulding behind the 2min.
The sheet material of above-mentioned forming is cut into the platelet of 75mm * 75mm * 5mm with plate-punching machine, with platelet be put into above-mentioned far-infrared heater similar add heating and melting in the heat transfer apparatus, with manipulator four good platelets of fusion being put into one then goes out in the mould of four moulds, and under 260 ℃, carry out compression moldedly with the pressure of 90MPa, produce toe-cap.
The glass fabric of the layer overlay 300tex on corrosion resistant plate of elder generation, then with fiberglass reinforced nylon 6 resin particulate material (the LFT pellet that adopt outstanding thing outstanding company produce of length for the about 3mm of 120mm diameter, fibre weight content 45%), quadrature tiles three layers, spreads the glass fabric of one deck 300tex more in the above.The temperature that has the chain transmitting device that the material completed is put into the about 2m of length together with corrosion resistant plate is that transmission speed is 2m/min in 270 ℃ the Far-infrared Heating case.Then, the material that fusion is good is put in 50 tons the flat plate mold of platen-press, imposes the pressure of 30MPa, takes out the sheet material of moulding behind the 2min.
The sheet material of above-mentioned forming is cut into the platelet of 70mm * 70mm * 5mm with plate-punching machine, with platelet be put into above-mentioned far-infrared heater similar add heating and melting in the heat transfer apparatus, with manipulator four good platelets of fusion being put into one then goes out in the mould of four moulds, and under 100 ℃, carry out compression moldedly with the pressure of 80MPa, produce toe-cap.
Comparing embodiment 1
Length is cut into the long fiber reinforced thermoplastic polypropylene resin of the about 2mm of diameter of 20mm, fibre weight content 50%, (at pressure is 4MPa by making these particles heating in intending the mould that is shaped carrying out plasticising processing, temperature is to continue 1 minute under 210 ℃ the condition), have the plan toe-cap of sweep with one of preliminary preparation.Then, resulting plan toe-cap is put into a toe-cap mould, and under the pressure of 40MPa, carry out with 135 ℃ compression molded, thereby produce toe-cap.
Comparing embodiment 2
By using thickness that the thermoplastic resin strengthened by glass fibre makes trapezoidal sheet material as 3.3mm, wherein this thermoplastic resin contains volume at polypropylene to account for 46% length is the glass fibre of 20mm, (fusion is softening: about 350 ℃ continue three minutes, compression molded: 1200kg/cm to make toe-cap with traditional sheet material forming technique
2, 120 ℃).
Then, the method for stipulating among the HS T8101 according to protective footwear that make for leather, the S level is when the clearance height at toe point place is compressed to 22mm, to carry out the test (standard that illustrates among the JIS is 1020kg) of compressive load with said method shaping toe-cap.
Provided the test result of four embodiment and two comparing embodiments in the table 1.
Table 1
Can see clearly that from the result shown in the table 1 intensity that the toe-cap that obtains in the comparing embodiment shows is lower.The toe-cap that is obtained by method of the present invention then presents the stable high compression load that does not disperse.
Although disclosed certain embodiments and comparing embodiment herein, under the prerequisite that does not break away from the present invention's spirit and inner characteristic, the present invention can also be implemented as other specific forms.Therefore; it only is illustrative and not restrictive that described embodiment and comparing embodiment are considered in all respects; protection scope of the present invention will be defined by claims; rather than point out by above-mentioned explanation; therefore, all fall into the meaning of such equivalents of claims and the variation in the scope all will be included in protection scope of the present invention.
Claims (8)
1. toe-cap for safety protection, comprise fiber reinforced thermoplastic resin, it is characterized in that, also comprise fiber cloth, described toe-cap is formed by fiber reinforced thermoplastic resin and fiber cloth compacting, wherein do local the enhancing and parcel at the toe-cap top with fiber cloth, the fibre weight content of toe-cap is between 25～70%; Long fiber length in the described fiber reinforced thermoplastic resin is continuously unidirectional or interweaves at an angle and arrange continuously greater than 20mm.
2. a kind of toe-cap for safety protection according to claim 1 is characterized in that, orthogonal thereto interweaving of described long fibre arranges continuously.
3. a kind of toe-cap for safety protection according to claim 1 is characterized in that, described long fibre is glass fibre or carbon fiber.
4. a kind of toe-cap for safety protection according to claim 1 is characterized in that, described thermoplastic resin is one or more of polypropylene, nylon, PET, Merlon.
5. a kind of toe-cap for safety protection according to claim 1 is characterized in that, described fiber cloth is one or more of glass fabric, carbon fiber, polypropylene fibre cloth or Fypro cloth.
6. the production method of a toe-cap for safety protection as claimed in claim 1, it is characterized in that, fiber cloth with long fiber reinforced thermoplastic resin particle material and an enhancing or package action, in heater, make sheet material after the fusion, again sheet material is cut into the polylith platelet, after the platelet heating and melting, place the toe-cap mould, the compression moulding toe-cap.
7. the production method of a kind of toe-cap for safety protection according to claim 6 is characterized in that, described sheet material is with long fiber reinforced thermoplastic resin particle material and fiber cloth shop layer, 1 under 5MPa pressure, 180～280 ℃ temperature compacted under.
8. the production method of a kind of toe-cap for safety protection according to claim 6 is characterized in that, the mode of heating of described heater is resistance heat air circulation mode of heating or Far-infrared Heating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510112396A CN1989862B (en) | 2005-12-30 | 2005-12-30 | Toe-cap for safety protection and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510112396A CN1989862B (en) | 2005-12-30 | 2005-12-30 | Toe-cap for safety protection and its production method |
Publications (2)
| Publication Number | Publication Date |
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| CN1989862A CN1989862A (en) | 2007-07-04 |
| CN1989862B true CN1989862B (en) | 2010-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510112396A Expired - Fee Related CN1989862B (en) | 2005-12-30 | 2005-12-30 | Toe-cap for safety protection and its production method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103405002A (en) * | 2013-06-28 | 2013-11-27 | 句容市百事特复合材料有限公司 | Composite glass fiber material with mixed reinforced form and safety toe cap made of composite glass fiber material |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560985A (en) * | 1991-04-03 | 1996-10-01 | Nitto Boseki Co., Ltd. | Molding sheet material and toe puff for safety shoe |
| CN1151935A (en) * | 1995-10-20 | 1997-06-18 | Ykk株式会社 | Process for producing molding sheet material fiber-reinforced modling sheet material produced by process and boxtoe of safety shoes made by use of material |
| CN1174780A (en) * | 1996-05-22 | 1998-03-04 | Ykk株式会社 | Fibre reinforced composite material and safety shoes head made of it |
| CN1201631A (en) * | 1997-06-11 | 1998-12-16 | 东洋纺织株式会社 | Lightweight lining at toecap of sefeguard boot |
| CN1343164A (en) * | 1999-03-10 | 2002-04-03 | 德信英国有限公司 | Laminar materials suitable for use in manufacture of shoes, method of making same and shoe stiffener materials including said laminar materials |
| CN2548443Y (en) * | 2002-04-28 | 2003-05-07 | 余英宗 | Safety toecap |
| CN1471875A (en) * | 2002-07-11 | 2004-02-04 | Ykk��ʽ���� | Safe toecap cover made of resin |
-
2005
- 2005-12-30 CN CN200510112396A patent/CN1989862B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560985A (en) * | 1991-04-03 | 1996-10-01 | Nitto Boseki Co., Ltd. | Molding sheet material and toe puff for safety shoe |
| CN1151935A (en) * | 1995-10-20 | 1997-06-18 | Ykk株式会社 | Process for producing molding sheet material fiber-reinforced modling sheet material produced by process and boxtoe of safety shoes made by use of material |
| CN1174780A (en) * | 1996-05-22 | 1998-03-04 | Ykk株式会社 | Fibre reinforced composite material and safety shoes head made of it |
| CN1201631A (en) * | 1997-06-11 | 1998-12-16 | 东洋纺织株式会社 | Lightweight lining at toecap of sefeguard boot |
| CN1343164A (en) * | 1999-03-10 | 2002-04-03 | 德信英国有限公司 | Laminar materials suitable for use in manufacture of shoes, method of making same and shoe stiffener materials including said laminar materials |
| CN2548443Y (en) * | 2002-04-28 | 2003-05-07 | 余英宗 | Safety toecap |
| CN1471875A (en) * | 2002-07-11 | 2004-02-04 | Ykk��ʽ���� | Safe toecap cover made of resin |
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| Publication number | Publication date |
|---|---|
| CN1989862A (en) | 2007-07-04 |
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