Processing method of synthetic fiber spectacle case

Abstract

The invention relates to the field of spectacle case processing, in particular to a processing method of a synthetic fiber spectacle case, which comprises the following steps: step 1, fully stirring and mixing PET (Polyethylene Terephthalate) fiber and 4080 fiber in a container at normal temperature, with the weight ratio of the 4080 fiber being 25-30%; 2, a synthetic fiber cloth blank is formed through a needle punching method; step 3, applying 800-850g of pressure to each square meter of the synthetic fiber cloth blank, and performing hot-pressing shaping at the temperature of 90-110 DEG C; and step 4, baking and heating the shaped synthetic fiber cloth blank to 230-240 DEG C, then putting the synthetic fiber cloth blank into a forming die at 19-25 DEG C, pressing for 20-25 seconds, shaping into a box body, and then cooling the shaped synthetic fiber cloth blank in the die for 25-35 seconds to normal temperature. The synthetic fiber spectacle case has the beneficial effects that the synthetic fiber formed by mixing the PET fiber and the 4080 low-melting-point fiber is used for processing the spectacle case, so that the spectacle case has higher strength and certain flexibility, and the material of the synthetic fiber can effectively protect the mirror surface.

Description

Technical Field

[0001] The invention relates to the technical field of glasses case processing, and in particular to a processing method of a synthetic fiber glasses case. Background Art

[0002] Glasses cases are common items in people's lives. In order to facilitate the storage of glasses and prevent the glasses cases from being deformed or damaging the lenses during storage, special glasses cases are needed to store glasses. Glasses cases can be divided into plastic glasses cases, iron glasses cases, magic glasses cases, and EVA glasses cases according to different materials.

[0003] The invention patent with application number 201911293566.7 applied by our company involves a processing method for a new type of glasses case, including the following steps: Step 1: Take a certain amount of felt silk raw material; Step 2: Use needle punching method to produce felt cloth, and add a setting agent with a weight ratio of 5% during the processing; Step 3: Roll up the formed felt cloth into a coil; Step 4: Cut the coiled felt cloth into sheet felt cloth according to the product model; Step 5: Heat the sheet felt cloth to 90-110 degrees Celsius within 25-35 seconds; Step 6: Put the heated sheet felt cloth into the molding mold and press it for 20-25 seconds, and then cool the molded felt cloth to room temperature within 25-35 seconds; Step 7: Cut the molded felt cloth and sew it into a finished glasses case. By adopting the above scheme, the present invention overcomes the shortcomings of the prior art and provides a new processing method for glasses cases, and the glasses cases produced by the present invention will not wear the lenses during the storage and transportation of glasses.

[0004] The above invention can process finished glasses cases, which are processed by mixing the blanks of the glasses cases through the setting agent. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the different processing methods mentioned above from the prior art, a processing method is provided by using a synthetic fiber formed by mixing PET fiber and 4080 low-melting-point fiber to process a glasses case so that the glasses case has high strength while also having a certain degree of flexibility and the material can effectively protect the mirror surface.

[0006] To achieve the above purpose, the following technical scheme is adopted, a method for processing a synthetic fiber eyeglass case, comprising the following steps: Step 1: Take PET fiber and 4080 fiber and mix them thoroughly in a container at room temperature. The weight proportion of 4080 fiber is 25%-30%; Step 2: forming a synthetic fiber cloth blank by needle punching; Step 3: hot pressing the synthetic fiber cloth blank at 90-110 degrees Celsius; Step 4: After the shaped synthetic fiber cloth blank is baked and heated to 230-240 degrees Celsius, it is placed in a molding mold at 19-25 degrees Celsius and pressed for 20-25 seconds to shape it into a box body. Then, the shaped synthetic fiber cloth blank is cooled to room temperature in the mold for 25-35 seconds.

[0007] Using the above technical solution, PET fiber is the full name of polyethylene terephthalate fiber, commonly known as polyester, with a melting point between 255-260 degrees Celsius, and 4080 fiber is non-glue cotton, which can be extracted from petroleum, with a low melting point of about 130 degrees Celsius. Both materials are pollution-free materials, so there will be no harmful impact on the environment when producing eyeglass cases. First, the two fibers are roughly beaten to make the two fibers initially mixed, and then the two fibers are finely mixed to make the two fibers fully mixed. The fully mixed synthetic fiber has a certain fluffiness, so the hot pressing roller applies a force of 800-850g per square meter to the synthetic fiber cloth blank, and the temperature of the hot pressing roller is set at 90 degrees Celsius-110 degrees Celsius, which will not cause 4080 The melting of low-melting-point fibers can increase the stability of synthetic fibers while quickly shaping them. The temperature of the hot pressing roller surface at 90-110 degrees Celsius prevents the synthetic fiber cloth blank from rebounding after being flattened, so that it can be shaped at the set thickness. The shaped synthetic fiber cloth blank needs to be baked at a temperature between 230-240 degrees Celsius until it softens without melting. Then the softened synthetic fiber cloth blank is injected into a mold at 19-25 degrees Celsius (room temperature) and pressed for 20-25 seconds to shape it. After cooling for 25-35 seconds, the finished glasses case is made. This temperature makes the glasses case have a good shaping effect and a moderate cooling time. If a lower temperature is used, the processed glasses case may crack due to rapid heating and cooling. Thereby reducing the yield rate, so that the manufactured glasses case has elasticity and a certain hardness due to the distribution of 4080 fibers on PET fibers. Pressing time too long will cause the box body to deform, pressing time too short will cause the box body to be unable to form, insufficient cooling time will cause the box body to soften, and too long cooling time will affect the processing efficiency. By mixing 25%-35% of 4080 fibers into PET fibers and using a needle punching method to form PET fibers similar to felt cloth structure, it will not scratch the glasses. At the same time, the hardness of this synthetic fiber cloth blank is moderate. When the glasses case is processed in the mold, since the crease line needs to be processed between the box body and the box cover, when the weight ratio of 4080 fibers is greater than 3 When the weight ratio of 4080 fiber is less than 25% or when the stirring is uneven, the crease line is easy to agglomerate, and the folding force of the glasses case will be very large, which will cause the glasses case to be unable to close and the glasses case cannot be buckled. When the weight ratio of 4080 fiber is less than 25%, the body of the glasses case is easy to be too soft, and the glasses case is easy to be broken and deformed. Therefore, the weight ratio of 4080 fiber needs to be maintained between 25% and 35%, so as to ensure that the crease line is not easy to agglomerate while having a certain hardness to make the glasses case as a whole more resistant to deformation and not easy to be broken. You can take an appropriate amount of fiber to make a synthetic fiber cloth blank and process the crease line for preliminary testing. The box lid and the box body can be closed at the crease line to test the hardness of the box. The box surface is not deformed and is qualified if it needs to withstand a force of no more than 40N.At the same time, keeping the mold at a room temperature of 19-25 degrees Celsius can also allow the synthetic fiber cloth blank that becomes soft after baking to be cooled and shaped in a mold with a specific shape of the glasses case within 25-35 seconds, thereby achieving the required shape and high production efficiency.

[0008] A method for processing a synthetic fiber glasses case can be further configured as follows: the fiber fineness of the PET fiber material is 5D-7D.

[0009] By adopting the above technical solution, by limiting the fiber fineness of PET fiber within the range of 5D-7D, PET fiber can be better mixed with 4080 fiber, so that the processed synthetic fiber has moderate hardness, and the processed glasses case can be easily closed, so as to realize the one-piece molding of the glasses case, increase the overall strength of the glasses case, and is not easy to tear or break. First of all, there are many types of polyester staple fibers, including cotton type, spunlace non-woven type, medium and long type, non-woven type, etc., which are suitable for different application scenarios. 5-7D polyester staple fiber refers to polyester staple fiber with a diameter of 5-7 denier (Denier), where "D" is the unit of fineness of polyester fiber, indicating the weight of 9000 meters of fiber. 5-7D polyester staple fiber has moderate fineness, which is neither too coarse nor too thin, so it has the following advantages in the production of needle-punched non-woven fabrics: Wide adaptability: 5-7D polyester staple fiber can adapt to the production process of various needle-punched non-woven fabrics due to its moderate diameter, ensuring the quality and performance of the finished product.

[0010] Moderate strength: 5-7D polyester staple fiber has moderate strength, which can ensure the durability of non-woven fabrics without causing processing difficulties due to excessive toughness.

[0011] ‌Cost-effective‌: Compared with finer or coarser polyester staple fibers, 5-7D polyester staple fibers are more cost-effective and suitable for large-scale production and applications.

[0012] In summary, 5-7D polyester staple fiber is an ideal choice for making needle-punched polyester non-woven fabrics due to its moderate diameter and excellent performance. It is widely used in products such as eyeglass cases that require strength, durability and strong adaptability.

[0013] A method for processing a synthetic fiber glasses case can be further configured as follows: the thickness of the synthetic fiber cloth blank in step three is 3.7 mm to 4.2 mm.

[0014] By adopting the above technical scheme, a force of 800-850g is applied per square meter to produce synthetic fiber cloth blanks with a thickness of 3.7mm-4.2mm, and the crease lines can be processed well, so that the glasses case processed from the synthetic fiber cloth blanks with this thickness can easily close the box body and the box lid. If the synthetic fiber cloth blank is thicker than the above thickness, it is easy to cause the glasses case body and the box lid to always remain in an open state, and there is a large tension between the two. The force of the Velcro or button cannot close the two, resulting in failure to meet the requirements of the finished glasses case. At the same time, the use of synthetic fiber cloth blanks with a thickness of 3.7mm-4.2mm can keep the opening and closing force of the processed glasses case within the range of 550-900g, that is, the buttons only need to maintain the above force to achieve stable opening and closing.

[0015] The present invention is further described in detail below in conjunction with embodiments. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the protection examples of the present invention.

[0017] Embodiment: A method for processing a synthetic fiber eyeglass case, comprising the following steps: A method for processing a synthetic fiber glasses case, characterized in that it comprises the following steps: Step 1: Take PET fiber and 4080 fiber and mix them thoroughly in a container at room temperature. The weight proportion of 4080 fiber is 25%-30%; Step 2: forming a synthetic fiber cloth blank by needle punching; Step 3: hot pressing the synthetic fiber cloth blank at 90-110 degrees Celsius; Step 4: After the shaped synthetic fiber cloth blank is baked and heated to 230-240 degrees Celsius, it is placed in a molding mold at 19-25 degrees Celsius and pressed for 20-25 seconds to shape it into a box body, and then the shaped synthetic fiber cloth blank is cooled to room temperature in the mold for 25-35 seconds.

[0018] The fiber fineness of the PET fiber material is limited to 5D-7D, thereby increasing the degree of bonding with the 4080 fiber. The synthetic fiber cloth blank in step three is subjected to a force of 800-850g per square meter, thereby limiting the thickness of the synthetic fiber cloth blank to 3.7mm-4.2mm. The finished eyeglass case processed from the synthetic fiber cloth blank of this thickness can be easily processed with a crease line between the box body and the box cover, and the crease line is not prone to the situation where the box body and the box cover are opened due to the crease line agglomeration. At the same time, it also has good deformation resistance and is not easy to tear or break.

[0019] Three different 4080 fiber weight ratio test glasses cases were selected for testing. The test results are as follows: 1. If the weight ratio of 4080 fiber is greater than 35% or the synthetic fiber cloth blank that is not evenly stirred is formed into a glasses case, it will cause the crease line at the opening and closing end of the glasses case to agglomerate, making the glasses case unable to close.

[0020] 2. The synthetic fiber cloth blank with a weight ratio of 25%-35% of 4080 fiber and evenly stirred is formed into a glasses case. There will be no lumps at the crease lines of the glasses case, so the glasses case can be just covered, and the glasses case also has a certain degree of deformation resistance.

[0021] 3. The synthetic fiber cloth blank with a weight ratio of less than 25% of 4080 fiber is formed into a glasses case. Although the crease lines on the glasses case can be formed, the entire glasses case is relatively soft and therefore easily deformed.

[0022] The test was conducted on a finished glasses case that was pressed in a molding die for less than 20 seconds. The crease between the case body and the lid was too shallow, and the opening and closing force of the glasses case was too large, which was greater than the opening and closing force test data of a qualified glasses case. In daily life, the glasses case would always remain open and glasses would fall out.

[0023] The test showed that the crease between the case body and the lid of the test glasses case was too deep, and the opening and closing force of the glasses case was too small, which was less than the opening and closing force test data of the qualified glasses case. In daily life, the service life of the glasses case would be greatly reduced due to the crease line, and the glasses case could not withstand long-term opening and closing.

[0024] In order to test the strength of the glasses case made of the above materials, a portion of the synthetic fiber cloth blank with a fiber weight ratio of 25%-35% after mixing was taken and pressed in a molding mold for 20-25 seconds and cooled for 25-30 seconds to make a sample glasses case. The sample glasses case was subjected to the following four tests as shown in the following table: As shown in the test item No. 1 in the table, the synthetic fiber material mentioned above has a certain ability to resist deformation and can withstand a compressive force of at least 40N, and the compression depth is 15% of the total height of the sample, and the opening of the box will not be squeezed open due to the squeezing force. The test data of the test product is 56N, which is greater than 40N, and therefore it is judged to be qualified.

[0025] As shown in the test item No. 2 in the table, the glasses case made of the above-mentioned synthetic fiber material needs to be dyed into different colors according to the needs of users in daily production, and the color fastness is good or poor, which is directly related to the health and safety of the human body. Products with poor color fastness will cause the pigment on the fabric to fall off and fade when exposed to rain and sweat during use. When some people with sweaty hands hold the glasses case with their hands, the dye molecules and heavy metal ions therein may be absorbed by the human body through the skin and endanger the health of the human skin. The user placing the glasses case in the inner pocket or bag will also cause internal staining. The glasses case made of the synthetic fiber material passes the above test and has a color fastness of 4-5, can adapt to dyeing with commonly used dyes and will not fade due to dry or wet friction in daily life. Therefore, the above-mentioned synthetic fiber is suitable for use as the material of the glasses case, with high safety and strong versatility.

[0026] As shown in the test item No. 3 in the table, the glasses case made of the synthetic fiber material mentioned above has a certain elastic force for opening. This test is also to test whether the number of times the crease is used meets the standard. The crease needs to be opened and closed repeatedly for 3,000 times without cracking or deformation. The glasses case passed the test and was therefore judged to be qualified.

[0027] As shown in the test item No. 4 in the table, the glasses case made of the above-mentioned synthetic fiber material also needs to be tested as in the comparative document to test whether the glasses case will wear out the lenses during transportation and use. Therefore, a vibration box test is performed with a load of 100g and a frequency of 36 times / minute. It is qualified if there are no scratches after 100 frictions. Therefore, test item 4 is also judged to be qualified.

[0028] When the sample glasses case passes the above four tests, it is a qualified glasses case. It has appropriate extrusion resistance, high color fastness, repeated opening and closing will not affect the crease line, will not cause wear to the mirror surface, and can better protect the glasses.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for processing a synthetic fiber glasses case, characterized in that: The following steps are involved: Step 1: Take PET fiber and 4080 fiber and mix them thoroughly in a container at room temperature. The weight proportion of 4080 fiber is 25%-30%; Step 2: forming a synthetic fiber cloth blank by needle punching; Step 3: Apply 800-850g of pressure per square meter to the synthetic fiber cloth blank and heat press it at a temperature of 90-110 degrees Celsius to shape it; Step 4: After the shaped synthetic fiber cloth blank is baked and heated to 230-240 degrees Celsius, it is placed in a molding mold at 19-25 degrees Celsius and pressed for 20-25 seconds to shape it into a box body, and then the shaped synthetic fiber cloth blank is cooled to room temperature in the mold for 25-35 seconds.

2. The method for processing a synthetic fiber eyeglass case according to claim 1, characterized in that: The fiber fineness of the PET fiber material is 5D-7D.

3. A method for processing a synthetic fiber eyeglass case according to claim 1 or 2, characterized in that: The thickness of the synthetic fiber cloth blank in step three is 3.7 mm to 4.2 mm.